if(WITH_TIFF AND NOT TIFF_FOUND)
add_subdirectory(libtiff)
endif()
+if(WIN32)
+ add_subdirectory(ffmpeg)
+endif()
--- /dev/null
+project(opencv_ffmpeg)
+
+if(MSVC64 OR MINGW64)
+ set(FFMPEG_SUFFIX _64)
+endif()
+
+set(module_bare_name "opencv_ffmpeg${FFMPEG_SUFFIX}.dll")
+set(module_name "${CMAKE_CURRENT_SOURCE_DIR}/${module_bare_name}")
+
+get_target_property(bin_dir opencv_traincascade LOCATION)
+get_filename_component(bin_dir ${bin_dir} PATH)
+
+message(STATUS "ffmpeg output dir: ${bin_dir}")
+
+add_custom_target(opencv_ffmpeg ALL
+ COMMAND ${CMAKE_COMMAND} -E copy
+ ${module_name} ${bin_dir}/${module_bare_name}
+ COMMENT "Copying ${module_name} to the output directory")
+
+install(FILES ${module_name} DESTINATION bin COMPONENT main)
--- /dev/null
+#include "cap_ffmpeg_impl.hpp"
--- /dev/null
+gcc -Wall -shared -o opencv_ffmpeg.dll -O2 -x c++ -I../include -I../include/ffmpeg_ -I../../modules/highgui/src ffopencv.c -L../lib -lavformat -lavcodec -lavdevice -lswscale -lavutil -lwsock32
+set path=c:\apps\mingw64\bin;%path% & gcc -Wall -shared -o opencv_ffmpeg_64.dll -O2 -x c++ -I../include -I../include/ffmpeg_ -I../../modules/highgui/src ffopencv.c -L../lib -lavformat64 -lavcodec64 -lavdevice64 -lswscale64 -lavutil64 -lavcore64 -lwsock32
\ No newline at end of file
--- /dev/null
+The build script is to be fixed.
+Right now it assumes that 32-bit MinGW is in the system path and
+64-bit mingw is installed to c:\Apps\MinGW64.
+
+It is important that gcc is used, not g++!
+Otherwise the produced DLL will likely be dependent on libgcc_s_dw2-1.dll or similar DLL.
+While we want to make the DLLs with minimum dependencies: Win32 libraries + msvcrt.dll.
+
+ffopencv.c is really a C++ source, hence -x c++ is used.
set(CMAKE_VERBOSE_MAKEFILE 1)
endif()
+if (WIN32)
+ if(${CMAKE_GENERATOR} MATCHES "(MinGW)|(MSYS)")
+ set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "")
+ endif()
+endif()
+
# --------------------------------------------------------------
# Indicate CMake 2.7 and above that we don't want to mix relative
# and absolute paths in linker lib lists.
set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries (.dll/.so) instead of static ones (.lib/.a)")
# ----------------------------------------------------------------------------
+# Include debug info into debug libs?
+# Default: yes
+# ----------------------------------------------------------------------------
+set(BUILD_WITH_DEBUG_INFO ON CACHE BOOL "Include debug info into debug libs")
+
+# ----------------------------------------------------------------------------
# Get actual OpenCV version number from sources
# ----------------------------------------------------------------------------
FILE(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/modules/core/include/opencv2/core/version.hpp" OPENCV_VERSION_PARTS REGEX "#define CV_.+OR_VERSION[ ]+[0-9]+" )
# Use statically or dynamically linked CRT?
# Default: dynamic
# ----------------------------------------------------------------------------
-if(MSVC AND NOT BUILD_SHARED_LIBS)
- option (BUILD_WITH_STATIC_CRT "Enables use of staticaly linked CRT" OFF)
+if(WIN32 AND NOT BUILD_SHARED_LIBS)
+ option (BUILD_WITH_STATIC_CRT "Enables use of staticaly linked CRT" ON)
endif()
if(MSVC)
endif()
endforeach(flag_var)
endif(BUILD_WITH_STATIC_CRT)
+
+ if(NOT BUILD_WITH_DEBUG_INFO)
+ string(REPLACE "/debug" "" CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/DEBUG" "" CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL:YES" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL " "/INCREMENTAL:NO " CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG}")
+
+ string(REPLACE "/debug" "" CMAKE_MODULE_LINKER_FLAGS_DEBUG "${CMAKE_MODULE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/DEBUG" "" CMAKE_MODULE_LINKER_FLAGS_DEBUG "${CMAKE_MODULE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL:YES" "/INCREMENTAL:NO" CMAKE_MODULE_LINKER_FLAGS_DEBUG "${CMAKE_MODULE_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL " "/INCREMENTAL:NO " CMAKE_MODULE_LINKER_FLAGS_DEBUG "${CMAKE_MODULE_LINKER_FLAGS_DEBUG}")
+
+ string(REPLACE "/debug" "" CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/DEBUG" "" CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL:YES" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}")
+ string(REPLACE "/INCREMENTAL " "/INCREMENTAL:NO " CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}")
+
+ string(REPLACE "/Zi" "" CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}")
+ string(REPLACE "/Zi" "" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}")
+ endif()
+
endif(MSVC)
# ----------------------------------------------------------------------------
else()
get_filename_component(_TBB_LIB_PATH "${TBB_INCLUDE_DIR}/../lib" ABSOLUTE)
- if(${CMAKE_SYSTEM_PROCESSOR} MATCHES amd64*|x86_64*)
+ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES amd64*|x86_64* OR MSVC64)
set(_TBB_LIB_PATH "${_TBB_LIB_PATH}/intel64")
- endif()
- if(${CMAKE_SYSTEM_PROCESSOR} MATCHES x86*|i386*|i686*)
+ elseif(${CMAKE_SYSTEM_PROCESSOR} MATCHES x86*|i386*|i686*)
set(_TBB_LIB_PATH "${_TBB_LIB_PATH}/ia32")
endif()
# set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} /D _BIND_TO_CURRENT_CRT_VERSION=1 /D _BIND_TO_CURRENT_VCLIBS_VERSION=1")
#endif()
- set(EXTRA_EXE_LINKER_FLAGS_RELEASE "${EXTRA_EXE_LINKER_FLAGS_RELEASE} /debug")
+ if(BUILD_WITH_DEBUG_INFO)
+ set(EXTRA_EXE_LINKER_FLAGS_RELEASE "${EXTRA_EXE_LINKER_FLAGS_RELEASE} /debug")
+ endif()
# Remove unreferenced functions: function level linking
set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} /Gy")
- set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /Zi")
+ if(BUILD_WITH_DEBUG_INFO)
+ set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /Zi")
+ endif()
endif()
if(CMAKE_COMPILER_IS_GNUCXX)
# High level of warnings.
set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wall")
+ if(BUILD_WITH_STATIC_CRT)
+ set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -static-libstdc++")
+ endif()
+
# The -Wno-long-long is required in 64bit systems when including sytem headers.
if(${CMAKE_SYSTEM_PROCESSOR} MATCHES x86_64*)
set(EXTRA_C_FLAGS "${EXTRA_C_FLAGS} -Wno-long-long")
endif()
set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} -DNDEBUG")
- set(EXTRA_C_FLAGS_DEBUG "${EXTRA_C_FLAGS_DEBUG} -O0 -ggdb3 -DDEBUG -D_DEBUG")
+ set(EXTRA_C_FLAGS_DEBUG "${EXTRA_C_FLAGS_DEBUG} -O0 -DDEBUG -D_DEBUG")
+ if(BUILD_WITH_DEBUG_INFO)
+ set(EXTRA_C_FLAGS_DEBUG "${EXTRA_C_FLAGS_DEBUG} -ggdb3")
+ endif()
endif()
if(MSVC)
- if(ENABLE_SSE)
- set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /arch:SSE")
- endif()
- if(ENABLE_SSE2)
- set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /arch:SSE2")
+ # 64-bit MSVC compiler uses SSE/SSE2 by default
+ if(NOT MSVC64)
+ if(ENABLE_SSE)
+ set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /arch:SSE")
+ endif()
+ if(ENABLE_SSE2)
+ set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /arch:SSE2")
+ endif()
endif()
if(ENABLE_SSE3)
set(EXTRA_C_FLAGS_RELEASE "${EXTRA_C_FLAGS_RELEASE} /arch:SSE3")
# CPack target
# ----------------------------------------------------------------------------
-set(BUILD_PACKAGE OFF CACHE BOOL "Build a installer with the SDK")
+set(BUILD_PACKAGE ON CACHE BOOL "Enables 'make package_source' command")
if(BUILD_PACKAGE)
configure_file(
include(${CMAKE_BINARY_DIR}/.cpack/Package.cmake)
set(root_files README)
- file(GLOB root_src_files *.in *.cmake CMakeLists.txt)
+ file(GLOB root_src_files *.in *.cmake *.rst CMakeLists.txt)
if (NOT WIN32)
install(FILES ${root_files}
COMPONENT src
)
- if(CMAKE_INSTALL_DEBUG_LIBRARIES)
- foreach(m calib3d core contrib features2d ffmpeg flann gpu highgui imgproc legacy ml objdetect video)
- install(FILES ${EXECUTABLE_OUTPUT_PATH}/Debug/opencv_${m}${OPENCV_DLLVERSION}d.dll
- DESTINATION bin COMPONENT main)
- install(FILES ${LIBRARY_OUTPUT_PATH}/Debug/opencv_${m}${OPENCV_DLLVERSION}d.lib
- DESTINATION lib COMPONENT main)
- endforeach()
- endif()
-
install(DIRECTORY data samples DESTINATION "." COMPONENT main PATTERN ".svn" EXCLUDE)
install(DIRECTORY 3rdparty android modules doc DESTINATION "." COMPONENT src PATTERN ".svn" EXCLUDE)
- #install(DIRECTORY doc DESTINATION doc COMPONENT src FILES_MATCHING PATTERN "*.rst" "*.tex")
- #install(DIRECTORY doc/pics DESTINATION doc COMPONENT src PATTERN ".svn" EXCLUDE)
- #install(DIRECTORY doc/latex2sphinx DESTINATION doc COMPONENT src PATTERN ".svn" EXCLUDE)
-
- # install TBB dlls
- if(WIN32 AND HAVE_TBB)
- string(REGEX REPLACE "/lib" "/bin" TBB_DLL_DIR "${TBB_LIB_DIR}")
- install(PROGRAMS "${TBB_DLL_DIR}/tbb.dll" DESTINATION bin COMPONENT main)
- install(PROGRAMS "${TBB_DLL_DIR}/tbb_debug.dll" DESTINATION bin COMPONENT main)
- endif()
endif()
endif()
# (c) Copyrights 2008 Hartmut Seichter, HIT Lab NZ
#
-if(MSVC)
- set(CMAKE_INSTALL_DEBUG_LIBRARIES 1)
-endif()
-#if(ENABLE_OPENMP)
-# set(CMAKE_INSTALL_OPENMP_LIBRARIES 1)
-#endif()
-include(InstallRequiredSystemLibraries)
-
set(CPACK_PACKAGE_NAME "OpenCV")
set(CPACK_PACKAGE_VENDOR "OpenCV project opencvlibrary.sourceforge.net")
set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "OpenCV SDK for ${CMAKE_GENERATOR} is an All-In-One package for developing computer vision applications")
-#set(CPACK_PACKAGE_DESCRIPTION_FILE "${CMAKE_SOURCE_DIR}/README")
set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/doc/license.txt")
set(CPACK_PACKAGE_VERSION_MAJOR "${OPENCV_VERSION_MAJOR}")
set(CPACK_COMPONENT_main_DISPLAY_NAME "Binaries and the Documentation")
set(CPACK_COMPONENT_src_DISPLAY_NAME "The source code")
-#set(CPACK_COMPONENT_py_DISPLAY_NAME "Python Bindings")
set(CPACK_ALL_INSTALL_TYPES Full)
set(CPACK_COMPONENT_MAIN_INSTALL_TYPES Full)
set(CPACK_COMPONENT_SRC_INSTALL_TYPES Full)
-#set(CPACK_COMPONENT_py_INSTALL_TYPES Full)
set(CPACK_SOURCE_IGNORE_FILES
"/\\\\.svn/"
if(NOT WIN32)
set(CPACK_SOURCE_IGNORE_FILES
"/lib/"
+ "\\\\.dll$"
"${CPACK_SOURCE_IGNORE_FILES}")
endif()
add_subdirectory(features2d)
add_subdirectory(flann)
-if(MSVC OR MINGW)
- add_subdirectory(ffmpeg)
-endif()
-
if(BUILD_TESTS)
add_subdirectory(ts)
endif()
----
Copies one array to another.
-.. cfunction:: void cvCopy(const CvArr* src, CvArr* dst, const CvArr* mask=NULL)
+.. ocv:cfunction:: void cvCopy(const CvArr* src, CvArr* dst, const CvArr* mask=NULL)
.. ocv:pyoldfunction:: cv.Copy(src, dst, mask=None)-> None
:param src: The source array
----------------
Makes OpenCV use IPL functions for allocating IplImage and IplROI structures.
-.. cfunction:: void cvSetIPLAllocators( Cv_iplCreateImageHeader create_header, Cv_iplAllocateImageData allocate_data, Cv_iplDeallocate deallocate, Cv_iplCreateROI create_roi, Cv_iplCloneImage clone_image )
+.. ocv:cfunction:: void cvSetIPLAllocators( Cv_iplCreateImageHeader create_header, Cv_iplAllocateImageData allocate_data, Cv_iplDeallocate deallocate, Cv_iplCreateROI create_roi, Cv_iplCloneImage clone_image )
Normally, the function is not called directly. Instead, a simple macro ``CV_TURN_ON_IPL_COMPATIBILITY()`` is used that calls ``cvSetIPLAllocators`` and passes there pointers to IPL allocation functions. ::
+++ /dev/null
-project(opencv_ffmpeg)
-
-include_directories("${CMAKE_CURRENT_SOURCE_DIR}")
-include_directories(
- "${CMAKE_SOURCE_DIR}/3rdparty/include"
- "${CMAKE_SOURCE_DIR}/3rdparty/include/ffmpeg_"
- )
-include_directories(
- "${CMAKE_SOURCE_DIR}/modules/highgui/src"
- "${CMAKE_SOURCE_DIR}/modules/core/include"
- "${CMAKE_SOURCE_DIR}/modules/imgproc/include"
- "${CMAKE_SOURCE_DIR}/modules/highgui/include"
- )
-link_directories("${CMAKE_SOURCE_DIR}/3rdparty/lib")
-
-set(the_target opencv_ffmpeg)
-add_library(${the_target} SHARED ffopencv.cpp ffopencv.h)
-
-add_dependencies(${the_target} opencv_core)
-target_link_libraries(${the_target} opencv_core)
-
-if (NOT MSVC)
- #target_link_libraries(${the_target}
- # ${CMAKE_SOURCE_DIR}/3rdparty/lib/libgcc_.a
- # ${CMAKE_SOURCE_DIR}/3rdparty/lib/libmingwex_.a)
- if(WIN32 AND MINGW64)
- target_link_libraries(${the_target} ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavformat64.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavcodec64.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavdevice64.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavutil64.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libswscale64.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavcore64.a
- libws2_32.a)
- else()
- target_link_libraries(${the_target} ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavformat.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavcodec.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libavutil.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libswscale.a
- ${CMAKE_SOURCE_DIR}/3rdparty/lib/libwsock32_.a)
- endif()
-endif ()
-
-set_target_properties(${the_target} PROPERTIES
- DEBUG_POSTFIX "${OPENCV_DEBUG_POSTFIX}"
- VERSION ${OPENCV_VERSION}
- OUTPUT_NAME "${the_target}${OPENCV_DLLVERSION}"
- DEFINE_SYMBOL "CVAPI_EXPORTS"
- ARCHIVE_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
- RUNTIME_OUTPUT_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}
- )
-
-if(ENABLE_SOLUTION_FOLDERS)
- set_target_properties(${the_target} PROPERTIES FOLDER "modules")
-endif()
-
-if (MSVC)
- set_target_properties(${the_target} PROPERTIES
- LINK_FLAGS "/NODEFAULTLIB:libc /DEBUG"
- )
-endif ()
-
-install(TARGETS ${the_target}
- RUNTIME DESTINATION bin COMPONENT main
- ARCHIVE DESTINATION lib COMPONENT main
- LIBRARY DESTINATION lib COMPONENT main
- )
+++ /dev/null
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2000, Intel Corporation, all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-//M*/
-
-/****************************************************************************************\
- Licensing notice:
- As the project ffopencv links ffmpeg libraries statically, its source code
- (ffopencv.cpp and ffopencv.h, but not cvcap_ffmpeg.cpp (!)), as well as the produced
- ffopencv*.dll are subjects to the Lesser GNU Public License:
- -----------------------------------------------------------
-
- GNU LESSER GENERAL PUBLIC LICENSE
- Version 2.1, February 1999
-
- Copyright (C) 1991, 1999 Free Software Foundation, Inc.
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.
-
-[This is the first released version of the Lesser GPL. It also counts
- as the successor of the GNU Library Public License, version 2, hence
- the version number 2.1.]
-
- Preamble
-
- The licenses for most software are designed to take away your
-freedom to share and change it. By contrast, the GNU General Public
-Licenses are intended to guarantee your freedom to share and change
-free software--to make sure the software is free for all its users.
-
- This license, the Lesser General Public License, applies to some
-specially designated software packages--typically libraries--of the
-Free Software Foundation and other authors who decide to use it. You
-can use it too, but we suggest you first think carefully about whether
-this license or the ordinary General Public License is the better
-strategy to use in any particular case, based on the explanations below.
-
- When we speak of free software, we are referring to freedom of use,
-not price. Our General Public Licenses are designed to make sure that
-you have the freedom to distribute copies of free software (and charge
-for this service if you wish); that you receive source code or can get
-it if you want it; that you can change the software and use pieces of
-it in new free programs; and that you are informed that you can do
-these things.
-
- To protect your rights, we need to make restrictions that forbid
-distributors to deny you these rights or to ask you to surrender these
-rights. These restrictions translate to certain responsibilities for
-you if you distribute copies of the library or if you modify it.
-
- For example, if you distribute copies of the library, whether gratis
-or for a fee, you must give the recipients all the rights that we gave
-you. You must make sure that they, too, receive or can get the source
-code. If you link other code with the library, you must provide
-complete object files to the recipients, so that they can relink them
-with the library after making changes to the library and recompiling
-it. And you must show them these terms so they know their rights.
-
- We protect your rights with a two-step method: (1) we copyright the
-library, and (2) we offer you this license, which gives you legal
-permission to copy, distribute and/or modify the library.
-
- To protect each distributor, we want to make it very clear that
-there is no warranty for the free library. Also, if the library is
-modified by someone else and passed on, the recipients should know
-that what they have is not the original version, so that the original
-author's reputation will not be affected by problems that might be
-introduced by others.
-
- Finally, software patents pose a constant threat to the existence of
-any free program. We wish to make sure that a company cannot
-effectively restrict the users of a free program by obtaining a
-restrictive license from a patent holder. Therefore, we insist that
-any patent license obtained for a version of the library must be
-consistent with the full freedom of use specified in this license.
-
- Most GNU software, including some libraries, is covered by the
-ordinary GNU General Public License. This license, the GNU Lesser
-General Public License, applies to certain designated libraries, and
-is quite different from the ordinary General Public License. We use
-this license for certain libraries in order to permit linking those
-libraries into non-free programs.
-
- When a program is linked with a library, whether statically or using
-a shared library, the combination of the two is legally speaking a
-combined work, a derivative of the original library. The ordinary
-General Public License therefore permits such linking only if the
-entire combination fits its criteria of freedom. The Lesser General
-Public License permits more lax criteria for linking other code with
-the library.
-
- We call this license the "Lesser" General Public License because it
-does Less to protect the user's freedom than the ordinary General
-Public License. It also provides other free software developers Less
-of an advantage over competing non-free programs. These disadvantages
-are the reason we use the ordinary General Public License for many
-libraries. However, the Lesser license provides advantages in certain
-special circumstances.
-
- For example, on rare occasions, there may be a special need to
-encourage the widest possible use of a certain library, so that it becomes
-a de-facto standard. To achieve this, non-free programs must be
-allowed to use the library. A more frequent case is that a free
-library does the same job as widely used non-free libraries. In this
-case, there is little to gain by limiting the free library to free
-software only, so we use the Lesser General Public License.
-
- In other cases, permission to use a particular library in non-free
-programs enables a greater number of people to use a large body of
-free software. For example, permission to use the GNU C Library in
-non-free programs enables many more people to use the whole GNU
-operating system, as well as its variant, the GNU/Linux operating
-system.
-
- Although the Lesser General Public License is Less protective of the
-users' freedom, it does ensure that the user of a program that is
-linked with the Library has the freedom and the wherewithal to run
-that program using a modified version of the Library.
-
- The precise terms and conditions for copying, distribution and
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-"work based on the library" and a "work that uses the library". The
-former contains code derived from the library, whereas the latter must
-be combined with the library in order to run.
-
- GNU LESSER GENERAL PUBLIC LICENSE
- TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
-
- 0. This License Agreement applies to any software library or other
-program which contains a notice placed by the copyright holder or
-other authorized party saying it may be distributed under the terms of
-this Lesser General Public License (also called "this License").
-Each licensee is addressed as "you".
-
- A "library" means a collection of software functions and/or data
-prepared so as to be conveniently linked with application programs
-(which use some of those functions and data) to form executables.
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- The "Library", below, refers to any such software library or work
-which has been distributed under these terms. A "work based on the
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-straightforwardly into another language. (Hereinafter, translation is
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- "Source code" for a work means the preferred form of the work for
-making modifications to it. For a library, complete source code means
-all the source code for all modules it contains, plus any associated
-interface definition files, plus the scripts used to control compilation
-and installation of the library.
-
- Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope. The act of
-running a program using the Library is not restricted, and output from
-such a program is covered only if its contents constitute a work based
-on the Library (independent of the use of the Library in a tool for
-writing it). Whether that is true depends on what the Library does
-and what the program that uses the Library does.
-
- 1. You may copy and distribute verbatim copies of the Library's
-complete source code as you receive it, in any medium, provided that
-you conspicuously and appropriately publish on each copy an
-appropriate copyright notice and disclaimer of warranty; keep intact
-all the notices that refer to this License and to the absence of any
-warranty; and distribute a copy of this License along with the
-Library.
-
- You may charge a fee for the physical act of transferring a copy,
-and you may at your option offer warranty protection in exchange for a
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-above, provided that you also meet all of these conditions:
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- a) The modified work must itself be a software library.
-
- b) You must cause the files modified to carry prominent notices
- stating that you changed the files and the date of any change.
-
- c) You must cause the whole of the work to be licensed at no
- charge to all third parties under the terms of this License.
-
- d) If a facility in the modified Library refers to a function or a
- table of data to be supplied by an application program that uses
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- is invoked, then you must make a good faith effort to ensure that,
- in the event an application does not supply such function or
- table, the facility still operates, and performs whatever part of
- its purpose remains meaningful.
-
- (For example, a function in a library to compute square roots has
- a purpose that is entirely well-defined independent of the
- application. Therefore, Subsection 2d requires that any
- application-supplied function or table used by this function must
- be optional: if the application does not supply it, the square
- root function must still compute square roots.)
-
-These requirements apply to the modified work as a whole. If
-identifiable sections of that work are not derived from the Library,
-and can be reasonably considered independent and separate works in
-themselves, then this License, and its terms, do not apply to those
-sections when you distribute them as separate works. But when you
-distribute the same sections as part of a whole which is a work based
-on the Library, the distribution of the whole must be on the terms of
-this License, whose permissions for other licensees extend to the
-entire whole, and thus to each and every part regardless of who wrote
-it.
-
-Thus, it is not the intent of this section to claim rights or contest
-your rights to work written entirely by you; rather, the intent is to
-exercise the right to control the distribution of derivative or
-collective works based on the Library.
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-\****************************************************************************************/
-
-#define CV_NO_VIDEO_CAPTURE_CPP_API 1
-
-#if _MSC_VER >= 1200
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-#endif
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-#include "precomp.hpp"
-#include "ffopencv.h"
-
-#if defined _MSC_VER && _MSC_VER >= 1200
-
-#if !defined(_MT) || defined(_DLL) || defined(_MSC_VER)
-extern "C" { __declspec(dllexport) unsigned int __lc_codepage = 0; }
-#endif
-#ifdef _M_X64
-#pragma comment(lib, "libgcc64.a")
-#pragma comment(lib, "libmingwex64.a")
-#else
-#pragma comment(lib, "libgcc_.a")
-#pragma comment(lib, "libmingwex_.a")
-#pragma comment(lib, "libcoldname_.a")
-#endif
-
-#ifdef _M_X64
-#pragma comment(lib, "libavformat64.a")
-#pragma comment(lib, "libavcodec64.a")
-#pragma comment(lib, "libavutil64.a")
-#pragma comment(lib, "libavcore64.a")
-#pragma comment(lib, "libswscale64.a")
-#pragma comment(lib, "libwsock3264.a")
-#else
-#pragma comment(lib, "libavformat.a")
-#pragma comment(lib, "libavcodec.a")
-#pragma comment(lib, "libavutil.a")
-#pragma comment(lib, "libswscale.a")
-#pragma comment(lib, "libwsock32_.a")
-#endif
-
-
-#endif
-
-#undef __STDC_CONSTANT_MACROS
-#define __STDC_CONSTANT_MACROS 1
-
-#undef snprintf
-#define snprintf _snprintf
-
-#ifdef _MSC_VER
-#include "msc_stdint.h"
-#endif
-#include "errno.h"
-
-#include "cap_ffmpeg.cpp"
-
-void cvReleaseCapture_FFMPEG(CvCapture** capture)
-{
- if( capture && *capture )
- {
- delete *capture;
- *capture = 0;
- }
-}
-
-int cvSetCaptureProperty_FFMPEG(CvCapture* capture, int prop_id, double value)
-{
- return capture->setProperty(prop_id, value);
-}
-
-double cvGetCaptureProperty_FFMPEG(CvCapture* capture, int prop_id)
-{
- return capture->getProperty(prop_id);
-}
-
-int cvGrabFrame_FFMPEG(CvCapture* capture)
-{
- return capture->grabFrame();
-}
-
-IplImage* cvRetrieveFrame_FFMPEG(CvCapture* capture, int streamIdx)
-{
- return capture->retrieveFrame(streamIdx);
-}
-
-void cvReleaseVideoWriter_FFMPEG( CvVideoWriter** writer )
-{
- if( writer && *writer )
- {
- delete *writer;
- *writer = 0;
- }
-}
-
-int cvWriteFrame_FFMPEG( CvVideoWriter* writer, const IplImage* image )
-{
- return writer->writeFrame(image);
-}
-
+++ /dev/null
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 2000, Intel Corporation, all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-//M*/
-
-/****************************************************************************************\
- Licensing notice:
- As the project ffopencv links ffmpeg libraries statically, its source code
- (ffopencv.cpp and ffopencv.h, but not cvcap_ffmpeg.cpp (!)), as well as the produced
- ffopencv*.dll are subjects to the Lesser GNU Public License:
- -----------------------------------------------------------
-
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-That's all there is to it!
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-\****************************************************************************************/
-
-#ifndef _FFOPENCV_H_
-#define _FFOPENCV_H_
-
-#define CV_NO_CVV_IMAGE
-
-#include "highgui.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-CVAPI(CvCapture*) cvCreateFileCapture_FFMPEG( const char* filename );
-CVAPI(void) cvReleaseCapture_FFMPEG(CvCapture** capture);
-CVAPI(int) cvSetCaptureProperty_FFMPEG(CvCapture* capture, int prop_id, double value);
-CVAPI(double) cvGetCaptureProperty_FFMPEG(CvCapture* capture, int prop_id);
-CVAPI(int) cvGrabFrame_FFMPEG(CvCapture* capture);
-CVAPI(IplImage*) cvRetrieveFrame_FFMPEG(CvCapture* capture, int);
-CVAPI(CvVideoWriter*) cvCreateVideoWriter_FFMPEG( const char * filename, int fourcc,
- double fps, CvSize frameSize, int is_color );
-CVAPI(void) cvReleaseVideoWriter_FFMPEG( CvVideoWriter** writer );
-CVAPI(int) cvWriteFrame_FFMPEG( CvVideoWriter* writer, const IplImage* image );
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-#endif /* _FFOPENCV_H_ */
set(highgui_srcs
src/cap.cpp
src/cap_images.cpp
+ src/cap_ffmpeg.cpp
src/loadsave.cpp
src/precomp.cpp
src/utils.cpp
if(NOT HAVE_QT)
set(highgui_srcs ${highgui_srcs} src/window_w32.cpp)
endif()
- set(highgui_srcs ${highgui_srcs} src/cap_vfw.cpp src/cap_cmu.cpp src/cap_w32.cpp src/cap_dshow.cpp)
+ set(highgui_srcs ${highgui_srcs} src/cap_vfw.cpp src/cap_cmu.cpp src/cap_dshow.cpp)
if(HAVE_MIL)
set(highgui_srcs ${highgui_srcs} src/cap_mil.cpp)
endif()
endif()
if(HAVE_FFMPEG)
- set(highgui_srcs ${highgui_srcs} src/cap_ffmpeg.cpp)
if(BZIP2_LIBRARIES)
set(HIGHGUI_LIBRARIES ${HIGHGUI_LIBRARIES} ${BZIP2_LIBRARIES})
endif()
{
CvCapture * result = 0;
- #ifdef WIN32
if (! result)
- result = cvCreateFileCapture_Win32 (filename);
- #endif
+ result = cvCreateFileCapture_FFMPEG_proxy (filename);
- #ifdef HAVE_FFMPEG
- if (! result)
- result = cvCreateFileCapture_FFMPEG (filename);
- #endif
-
#ifdef HAVE_XINE
if (! result)
result = cvCreateFileCapture_XINE (filename);
if(!fourcc || !fps)
result = cvCreateVideoWriter_Images(filename);
- #ifdef WIN32
if(!result)
- result = cvCreateVideoWriter_Win32(filename, fourcc, fps, frameSize, is_color);
- #endif
+ result = cvCreateVideoWriter_FFMPEG_proxy (filename, fourcc, fps, frameSize, is_color);
/* #ifdef HAVE_XINE
if(!result)
result = cvCreateVideoWriter_XINE(filename, fourcc, fps, frameSize, is_color);
#endif
*/
- #ifdef HAVE_FFMPEG
- if(!result)
- result = cvCreateVideoWriter_FFMPEG(filename, fourcc, fps, frameSize, is_color);
- #endif
#ifdef HAVE_QUICKTIME
if(!result)
#include "precomp.hpp"
-#if defined _MSC_VER && _MSC_VER >= 1200
-#pragma warning( disable: 4244 4510 4512 4610 )
-#endif
-
-extern "C" {
-#if !defined(WIN32) || defined(__MINGW32__)
-// some versions of FFMPEG assume a C99 compiler, and don't define INT64_C
-#if !defined INT64_C || !defined UINT64_C
-#define INT64_C
-#define UINT64_C
-#define __STDC_CONSTANT_MACROS
-// force re-inclusion of stdint.h to get INT64_C macro
-#undef _STDINT_H
-#include <stdint.h>
-#endif
-#include <errno.h>
-#endif
-
-#ifdef WIN32
- #define HAVE_FFMPEG_SWSCALE 1
- #include <libavformat/avformat.h>
- #include <libavcodec/avcodec.h>
- #include <libswscale/swscale.h>
-#else
-
-// if the header path is not specified explicitly, let's deduce it
-#if !defined HAVE_FFMPEG_AVCODEC_H && !defined HAVE_LIBAVCODEC_AVCODEC_H
-
-#if defined(HAVE_GENTOO_FFMPEG)
- #define HAVE_LIBAVCODEC_AVCODEC_H 1
- #define HAVE_LIBAVFORMAT_AVFORMAT_H 1
- #if defined(HAVE_FFMPEG_SWSCALE)
- #define HAVE_LIBSWSCALE_SWSCALE_H 1
- #endif
-#elif defined HAVE_FFMPEG
- #define HAVE_FFMPEG_AVCODEC_H 1
- #define HAVE_FFMPEG_AVFORMAT_H 1
- #if defined(HAVE_FFMPEG_SWSCALE)
- #define HAVE_FFMPEG_SWSCALE_H 1
- #endif
-#endif
-
-#endif
-
-#if defined(HAVE_FFMPEG_AVCODEC_H)
- #include <ffmpeg/avcodec.h>
-#endif
-#if defined(HAVE_FFMPEG_AVFORMAT_H)
- #include <ffmpeg/avformat.h>
-#endif
-#if defined(HAVE_FFMPEG_SWSCALE_H)
- #include <ffmpeg/swscale.h>
-#endif
-
-#if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
- #include <libavformat/avformat.h>
-#endif
-#if defined(HAVE_LIBAVCODEC_AVCODEC_H)
- #include <libavcodec/avcodec.h>
-#endif
-#if defined(HAVE_LIBSWSCALE_SWSCALE_H)
- #include <libswscale/swscale.h>
-#endif
-
-#endif
-
-}
-
-#if defined _MSC_VER && _MSC_VER >= 1200
-#pragma warning( default: 4244 4510 4512 4610 )
-#endif
-
-#ifdef NDEBUG
-#define CV_WARN(message)
+#ifdef HAVE_FFMPEG
+#include "cap_ffmpeg_impl.hpp"
#else
-#define CV_WARN(message) fprintf(stderr, "warning: %s (%s:%d)\n", message, __FILE__, __LINE__)
-#endif
-
-
-#ifndef MKTAG
-#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
-#endif
-
-/* PIX_FMT_RGBA32 macro changed in newer ffmpeg versions */
-#ifndef PIX_FMT_RGBA32
-#define PIX_FMT_RGBA32 PIX_FMT_RGB32
-#endif
-
-
-
-char * FOURCC2str( int fourcc )
-{
- char * mystr=(char*)malloc(5);
- mystr[0]=(char)((fourcc )&255);
- mystr[1]=(char)((fourcc>> 8)&255);
- mystr[2]=(char)((fourcc>>16)&255);
- mystr[3]=(char)((fourcc>>24)&255);
- mystr[4]=0;
- return mystr;
-}
-
-
-// required to look up the correct codec ID depending on the FOURCC code,
-// this is just a snipped from the file riff.c from ffmpeg/libavformat
-typedef struct AVCodecTag {
- int id;
- unsigned int tag;
-} AVCodecTag;
-
-const AVCodecTag codec_bmp_tags[] = {
- { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
- { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
- { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
- { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
- { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
- { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
-
- { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
- { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
- { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
- { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
-
- /* added based on MPlayer */
- { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
- { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
-
- { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
- { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
- { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
- { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
- { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
- { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
- { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
-
- /* added based on MPlayer */
- { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
- { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
- { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
- { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
- { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
- { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
-
- { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
-
- { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
- { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
-
- /* added based on MPlayer */
- { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
- { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
- { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
- { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
- { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
- { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
- { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
-
- { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
-
- /* added based on MPlayer */
- { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
-
- { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
-
- { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
-
- /* added based on MPlayer */
- { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
- { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
- { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
- { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
- { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
- { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
- { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
- { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
- { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
- { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
- { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
- { CODEC_ID_MPEG1VIDEO, 0x10000001 },
- { CODEC_ID_MPEG2VIDEO, 0x10000002 },
- { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
- { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
- { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
- { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
- { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
- { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
- { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
- { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
- { CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
- { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') },
- { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
- { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
- { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
- { CODEC_ID_RAWVIDEO, 0 },
- { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
- { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
- { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
- { CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
- { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
- { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
- { CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
- { CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
- { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
- { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
- { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
- { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
- { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
- { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
- { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
- { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
- { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
- { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
- { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
- { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
- { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
- { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
- { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
- { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
- { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
- { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
- { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
- { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
- { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
- { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
- { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
- { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
- { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
- { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
- { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
- { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
- { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
- { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
- { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
- { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
- { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
- { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
-#if LIBAVCODEC_VERSION_INT>0x000409
- { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
- { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
- { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
- { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
- { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
-#endif
-#if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0)
- { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
- { CODEC_ID_JPEGLS,MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
- { CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
- { CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
- { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
- { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
- { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
-#endif
-#if LIBAVCODEC_VERSION_INT>((51<<16)+(11<<8)+0)
- { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
- { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
- { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
- { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
- { CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
- { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
- { CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
-#endif
-#if LIBAVCODEC_VERSION_INT>=((51<<16)+(49<<8)+0)
-// this tag seems not to exist in older versions of FFMPEG
- { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
-#endif
- { CODEC_ID_NONE, 0 },
-};
-
-
-class CvCapture_FFMPEG : public CvCapture
-{
-public:
- CvCapture_FFMPEG() { init(); }
- virtual ~CvCapture_FFMPEG() { close(); }
-
- virtual bool open( const char* filename );
- virtual void close();
-
- virtual double getProperty(int);
- virtual bool setProperty(int, double);
- virtual bool grabFrame();
- virtual IplImage* retrieveFrame(int);
-
-protected:
- void init();
- bool reopen();
- bool slowSeek( int framenumber );
-
- AVFormatContext * ic;
- int video_stream;
- AVStream * video_st;
- AVFrame * picture;
- int64_t picture_pts;
- AVFrame rgb_picture;
- AVPacket packet;
- IplImage frame;
-#if defined(HAVE_FFMPEG_SWSCALE)
- struct SwsContext *img_convert_ctx;
+#include "cap_ffmpeg_api.hpp"
#endif
-/*
- 'filename' contains the filename of the videosource,
- 'filename==NULL' indicates that ffmpeg's seek support works
- for the particular file.
- 'filename!=NULL' indicates that the slow fallback function is used for seeking,
- and so the filename is needed to reopen the file on backward seeking.
-*/
- char * filename;
-};
-
-
-void CvCapture_FFMPEG::init()
-{
- ic = 0;
- video_stream = -1;
- video_st = 0;
- picture = 0;
- picture_pts = 0;
- memset( &rgb_picture, 0, sizeof(rgb_picture) );
- memset( &frame, 0, sizeof(frame) );
- filename = 0;
- packet.data = NULL;
-#if defined(HAVE_FFMPEG_SWSCALE)
- img_convert_ctx = 0;
-#endif
-}
+static CvCreateFileCapture_Plugin icvCreateFileCapture_FFMPEG_p = 0;
+static CvReleaseCapture_Plugin icvReleaseCapture_FFMPEG_p = 0;
+static CvGrabFrame_Plugin icvGrabFrame_FFMPEG_p = 0;
+static CvRetrieveFrame_Plugin icvRetrieveFrame_FFMPEG_p = 0;
+static CvSetCaptureProperty_Plugin icvSetCaptureProperty_FFMPEG_p = 0;
+static CvGetCaptureProperty_Plugin icvGetCaptureProperty_FFMPEG_p = 0;
+static CvCreateVideoWriter_Plugin icvCreateVideoWriter_FFMPEG_p = 0;
+static CvReleaseVideoWriter_Plugin icvReleaseVideoWriter_FFMPEG_p = 0;
+static CvWriteFrame_Plugin icvWriteFrame_FFMPEG_p = 0;
-void CvCapture_FFMPEG::close()
+static void
+icvInitFFMPEG(void)
{
- if( picture )
- av_free(picture);
-
- if( video_st )
- {
-#if LIBAVFORMAT_BUILD > 4628
- avcodec_close( video_st->codec );
-#else
- avcodec_close( &video_st->codec );
-#endif
- video_st = NULL;
- }
-
- if( ic )
+ static int ffmpegInitialized = 0;
+ if( !ffmpegInitialized )
{
- av_close_input_file(ic);
- ic = NULL;
- }
-
- if( rgb_picture.data[0] )
- cvFree( &rgb_picture.data[0] );
-
- // free last packet if exist
- if (packet.data) {
- av_free_packet (&packet);
- }
-
-
- init();
-}
-
-
-/*
- Used to reopen a video if the slower fallback function for seeking is used.
-*/
-bool CvCapture_FFMPEG::reopen()
-{
- if ( filename==NULL ) return false;
-
-#if LIBAVFORMAT_BUILD > 4628
- avcodec_close( video_st->codec );
-#else
- avcodec_close( &video_st->codec );
-#endif
- av_close_input_file(ic);
-
- // reopen video
- av_open_input_file(&ic, filename, NULL, 0, NULL);
- av_find_stream_info(ic);
-#if LIBAVFORMAT_BUILD > 4628
- AVCodecContext *enc = ic->streams[video_stream]->codec;
-#else
- AVCodecContext *enc = &ic->streams[video_stream]->codec;
-#endif
- AVCodec *codec = avcodec_find_decoder(enc->codec_id);
- avcodec_open(enc, codec);
- video_st = ic->streams[video_stream];
-
- // reset framenumber to zero
- picture_pts=0;
-
- return true;
-}
-
-#ifndef AVSEEK_FLAG_FRAME
- #define AVSEEK_FLAG_FRAME 0
-#endif
-
-bool CvCapture_FFMPEG::open( const char* _filename )
-{
- unsigned i;
- bool valid = false;
-
- close();
-
- /* register all codecs, demux and protocols */
- av_register_all();
-
-#ifndef _DEBUG
- // av_log_level = AV_LOG_QUIET;
-#endif
-
- int err = av_open_input_file(&ic, _filename, NULL, 0, NULL);
- if (err < 0) {
- CV_WARN("Error opening file");
- goto exit_func;
- }
- err = av_find_stream_info(ic);
- if (err < 0) {
- CV_WARN("Could not find codec parameters");
- goto exit_func;
- }
- for(i = 0; i < ic->nb_streams; i++) {
-#if LIBAVFORMAT_BUILD > 4628
- AVCodecContext *enc = ic->streams[i]->codec;
-#else
- AVCodecContext *enc = &ic->streams[i]->codec;
+ #if defined WIN32 || defined _WIN32
+ const char* module_name = "opencv_ffmpeg"
+ #if (defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__)
+ "_64"
+ #endif
+ ".dll";
+
+ static HMODULE icvFFOpenCV = LoadLibrary( module_name );
+ if( icvFFOpenCV )
+ {
+ icvCreateFileCapture_FFMPEG_p =
+ (CvCreateFileCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateFileCapture_FFMPEG");
+ icvReleaseCapture_FFMPEG_p =
+ (CvReleaseCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseCapture_FFMPEG");
+ icvGrabFrame_FFMPEG_p =
+ (CvGrabFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvGrabFrame_FFMPEG");
+ icvRetrieveFrame_FFMPEG_p =
+ (CvRetrieveFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvRetrieveFrame_FFMPEG");
+ icvSetCaptureProperty_FFMPEG_p =
+ (CvSetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvSetCaptureProperty_FFMPEG");
+ icvGetCaptureProperty_FFMPEG_p =
+ (CvGetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvGetCaptureProperty_FFMPEG");
+ icvCreateVideoWriter_FFMPEG_p =
+ (CvCreateVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateVideoWriter_FFMPEG");
+ icvReleaseVideoWriter_FFMPEG_p =
+ (CvReleaseVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseVideoWriter_FFMPEG");
+ icvWriteFrame_FFMPEG_p =
+ (CvWriteFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvWriteFrame_FFMPEG");
+
+#if 0
+ if( icvCreateFileCapture_FFMPEG_p != 0 &&
+ icvReleaseCapture_FFMPEG_p != 0 &&
+ icvGrabFrame_FFMPEG_p != 0 &&
+ icvRetrieveFrame_FFMPEG_p != 0 &&
+ icvSetCaptureProperty_FFMPEG_p != 0 &&
+ icvGetCaptureProperty_FFMPEG_p != 0 &&
+ icvCreateVideoWriter_FFMPEG_p != 0 &&
+ icvReleaseVideoWriter_FFMPEG_p != 0 &&
+ icvWriteFrame_FFMPEG_p != 0 )
+ {
+ printf("Successfully initialized ffmpeg plugin!\n");
+ }
+ else
+ {
+ printf("Failed to load FFMPEG plugin: module handle=%p\n", icvFFOpenCV);
+ }
#endif
-
- if( CODEC_TYPE_VIDEO == enc->codec_type && video_stream < 0) {
- AVCodec *codec = avcodec_find_decoder(enc->codec_id);
- if (!codec ||
- avcodec_open(enc, codec) < 0)
- goto exit_func;
- video_stream = i;
- video_st = ic->streams[i];
- picture = avcodec_alloc_frame();
-
- rgb_picture.data[0] = (uint8_t*)cvAlloc(
- avpicture_get_size( PIX_FMT_BGR24,
- enc->width, enc->height ));
- avpicture_fill( (AVPicture*)&rgb_picture, rgb_picture.data[0],
- PIX_FMT_BGR24, enc->width, enc->height );
-
- cvInitImageHeader( &frame, cvSize( enc->width,
- enc->height ), 8, 3, 0, 4 );
- cvSetData( &frame, rgb_picture.data[0],
- rgb_picture.linesize[0] );
- break;
}
- }
-
- if(video_stream >= 0) valid = true;
-
- // perform check if source is seekable via ffmpeg's seek function av_seek_frame(...)
- err = av_seek_frame(ic, video_stream, 10, 0);
- if (err < 0)
- {
- filename=(char*)malloc(strlen(_filename)+1);
- strcpy(filename, _filename);
- // reopen videofile to 'seek' back to first frame
- reopen();
- }
- else
- {
- // seek seems to work, so we don't need the filename,
- // but we still need to seek back to filestart
- filename=NULL;
- int64_t ts = video_st->first_dts;
- int flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_BACKWARD;
- av_seek_frame(ic, video_stream, ts, flags);
- }
-exit_func:
-
- if( !valid )
- close();
-
- return valid;
-}
-
-
-bool CvCapture_FFMPEG::grabFrame()
-{
- bool valid = false;
- static bool bFirstTime = true;
- int got_picture;
-
- // First time we're called, set packet.data to NULL to indicate it
- // doesn't have to be freed
- if (bFirstTime) {
- bFirstTime = false;
- packet.data = NULL;
- }
-
- if( !ic || !video_st )
- return false;
-
- // free last packet if exist
- if (packet.data != NULL) {
- av_free_packet (&packet);
- }
-
- // get the next frame
- while (!valid) {
- int ret = av_read_frame(ic, &packet);
- if (ret == AVERROR(EAGAIN))
- continue;
- if (ret < 0)
- break;
+ #elif defined HAVE_FFMPEG
+ icvCreateFileCapture_FFMPEG_p = (CvCreateFileCapture_Plugin)cvCreateFileCapture_FFMPEG;
+ icvReleaseCapture_FFMPEG_p = (CvReleaseCapture_Plugin)cvReleaseCapture_FFMPEG;
+ icvGrabFrame_FFMPEG_p = (CvGrabFrame_Plugin)cvGrabFrame_FFMPEG;
+ icvRetrieveFrame_FFMPEG_p = (CvRetrieveFrame_Plugin)cvRetrieveFrame_FFMPEG;
+ icvSetCaptureProperty_FFMPEG_p = (CvSetCaptureProperty_Plugin)cvSetCaptureProperty_FFMPEG;
+ icvGetCaptureProperty_FFMPEG_p = (CvGetCaptureProperty_Plugin)cvGetCaptureProperty_FFMPEG;
+ icvCreateVideoWriter_FFMPEG_p = (CvCreateVideoWriter_Plugin)cvCreateVideoWriter_FFMPEG;
+ icvReleaseVideoWriter_FFMPEG_p = (CvReleaseVideoWriter_Plugin)cvReleaseVideoWriter_FFMPEG;
+ icvWriteFrame_FFMPEG_p = (CvWriteFrame_Plugin)cvWriteFrame_FFMPEG;
+ #endif
- if( packet.stream_index != video_stream ) {
- av_free_packet (&packet);
- continue;
- }
-
-#if LIBAVFORMAT_BUILD > 4628
- avcodec_decode_video(video_st->codec,
- picture, &got_picture,
- packet.data, packet.size);
-#else
- avcodec_decode_video(&video_st->codec,
- picture, &got_picture,
- packet.data, packet.size);
-#endif
-
- if (got_picture) {
- // we have a new picture, so memorize it
- picture_pts = packet.pts;
- valid = 1;
- }
+ ffmpegInitialized = 1;
}
-
- // return if we have a new picture or not
- return valid;
-}
-
-
-IplImage* CvCapture_FFMPEG::retrieveFrame(int)
-{
- if( !video_st || !picture->data[0] )
- return 0;
-
-#if !defined(HAVE_FFMPEG_SWSCALE)
-#if LIBAVFORMAT_BUILD > 4628
- img_convert( (AVPicture*)&rgb_picture, PIX_FMT_BGR24,
- (AVPicture*)picture,
- video_st->codec->pix_fmt,
- video_st->codec->width,
- video_st->codec->height );
-#else
- img_convert( (AVPicture*)&rgb_picture, PIX_FMT_BGR24,
- (AVPicture*)picture,
- video_st->codec.pix_fmt,
- video_st->codec.width,
- video_st->codec.height );
-#endif
-#else
- img_convert_ctx = sws_getContext(video_st->codec->width,
- video_st->codec->height,
- video_st->codec->pix_fmt,
- video_st->codec->width,
- video_st->codec->height,
- PIX_FMT_BGR24,
- SWS_BICUBIC,
- NULL, NULL, NULL);
-
- sws_scale(img_convert_ctx, picture->data,
- picture->linesize, 0,
- video_st->codec->height,
- rgb_picture.data, rgb_picture.linesize);
- sws_freeContext(img_convert_ctx);
-#endif
- return &frame;
}
-#if defined(__APPLE__)
-#define AV_NOPTS_VALUE_ ((int64_t)0x8000000000000000LL)
-#else
-#define AV_NOPTS_VALUE_ ((int64_t)AV_NOPTS_VALUE)
-#endif
-double CvCapture_FFMPEG::getProperty( int property_id )
+class CvCapture_FFMPEG_proxy : public CvCapture
{
- // if( !capture || !video_st || !picture->data[0] ) return 0;
- if( !video_st ) return 0;
-
- double frameScale = av_q2d (video_st->time_base) * av_q2d (video_st->r_frame_rate);
- int64_t timestamp;
- timestamp = picture_pts;
+public:
+ CvCapture_FFMPEG_proxy() { ffmpegCapture = 0; }
+ virtual ~CvCapture_FFMPEG_proxy() { close(); }
- switch( property_id )
+ virtual double getProperty(int propId)
{
- case CV_CAP_PROP_POS_MSEC:
- if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
- return (((double)video_st->parser->dts-1) *1000.0f) * av_q2d (video_st->time_base);
- if(video_st->cur_dts != AV_NOPTS_VALUE_)
- return ((video_st->cur_dts-video_st->first_dts) * 1000.0 * av_q2d (video_st->time_base));
- break;
- case CV_CAP_PROP_POS_FRAMES:
- if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
- return (double)video_st->parser->dts-1;
- if(video_st->cur_dts != AV_NOPTS_VALUE_)
- return((video_st->cur_dts-video_st->first_dts) * frameScale);
- break;
- case CV_CAP_PROP_POS_AVI_RATIO:
- if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
- return (double)(video_st->parser->dts-1)/(double)video_st->duration;
- if(video_st->cur_dts != AV_NOPTS_VALUE_ && video_st->duration != AV_NOPTS_VALUE_)
- return(((video_st->cur_dts-video_st->first_dts)+(1.0/frameScale)) / (double)video_st->duration);
- break;
- case CV_CAP_PROP_FRAME_COUNT:
- if(video_st->duration != AV_NOPTS_VALUE_)
- return (double)video_st->duration * frameScale;
- break;
- case CV_CAP_PROP_FRAME_WIDTH:
- return (double)frame.width;
- break;
- case CV_CAP_PROP_FRAME_HEIGHT:
- return (double)frame.height;
- break;
- case CV_CAP_PROP_FPS:
-#if LIBAVCODEC_BUILD > 4753
- return av_q2d (video_st->r_frame_rate);
-#else
- return (double)video_st->codec.frame_rate
- / (double)video_st->codec.frame_rate_base;
-#endif
- break;
- case CV_CAP_PROP_FOURCC:
-#if LIBAVFORMAT_BUILD > 4628
- return (double)video_st->codec->codec_tag;
-#else
- return (double)video_st->codec.codec_tag;
-#endif
- break;
+ return ffmpegCapture ? icvGetCaptureProperty_FFMPEG_p(ffmpegCapture, propId) : 0;
}
- return 0;
-}
-
-
-
-// this is a VERY slow fallback function, ONLY used if ffmpeg's av_seek_frame delivers no correct result!
-bool CvCapture_FFMPEG::slowSeek( int framenumber )
-{
- if ( framenumber>picture_pts )
+ virtual bool setProperty(int propId, double value)
{
- while ( picture_pts<framenumber )
- if ( !grabFrame() ) return false;
+ return ffmpegCapture ? icvSetCaptureProperty_FFMPEG_p(ffmpegCapture, propId, value)!=0 : false;
}
- else if ( framenumber<picture_pts )
+ virtual bool grabFrame()
{
- reopen();
- while ( picture_pts<framenumber )
- if ( !grabFrame() ) return false;
+ return ffmpegCapture ? icvGrabFrame_FFMPEG_p(ffmpegCapture)!=0 : false;
}
- return true;
-}
-
-
-bool CvCapture_FFMPEG::setProperty( int property_id, double value )
-{
- if( !video_st ) return false;
-
- switch( property_id )
+ virtual IplImage* retrieveFrame(int)
{
- case CV_CAP_PROP_POS_MSEC:
- case CV_CAP_PROP_POS_FRAMES:
- case CV_CAP_PROP_POS_AVI_RATIO:
- {
- int64_t timestamp = ic->streams[video_stream]->first_dts;
- AVRational time_base = ic->streams[video_stream]->time_base;
- AVRational frame_base = ic->streams[video_stream]->r_frame_rate;
- double timeScale = (time_base.den / (double)time_base.num) / (frame_base.num / frame_base.den);
- switch( property_id )
- {
- case CV_CAP_PROP_POS_FRAMES:
- timestamp += (int64_t)(value * timeScale);
- if(ic->start_time != AV_NOPTS_VALUE_)
- timestamp += ic->start_time;
- break;
-
- case CV_CAP_PROP_POS_MSEC:
- timestamp +=(int64_t)(value*(float(time_base.den)/float(time_base.num))/1000);
- if(ic->start_time != AV_NOPTS_VALUE_)
- timestamp += ic->start_time;
- break;
-
- case CV_CAP_PROP_POS_AVI_RATIO:
- timestamp += (int64_t)(value*ic->duration);
- if(ic->start_time != AV_NOPTS_VALUE_ && ic->duration != AV_NOPTS_VALUE_)
- timestamp += ic->start_time;
- break;
- }
-
- if ( filename )
- {
- // ffmpeg's seek doesn't work...
- if (!slowSeek((int)timestamp))
- {
- fprintf(stderr, "HIGHGUI ERROR: AVI: could not (slow) seek to position %0.3f\n",
- (double)timestamp / AV_TIME_BASE);
- return false;
- }
- }
- else
- {
- int flags = AVSEEK_FLAG_FRAME;
- if (timestamp < ic->streams[video_stream]->cur_dts)
- flags |= AVSEEK_FLAG_BACKWARD;
- int ret = av_seek_frame(ic, video_stream, timestamp, flags);
- if (ret < 0)
- {
- fprintf(stderr, "HIGHGUI ERROR: AVI: could not seek to position %0.3f\n",
- (double)timestamp / AV_TIME_BASE);
- return false;
- }
- }
- picture_pts=(int64_t)value;
- }
- break;
+ unsigned char* data = 0;
+ int step=0, width=0, height=0, cn=0;
+
+ if(!ffmpegCapture ||
+ !icvRetrieveFrame_FFMPEG_p(ffmpegCapture,&data,&step,&width,&height,&cn))
+ return 0;
+ cvInitImageHeader(&frame, cvSize(width, height), 8, cn);
+ cvSetData(&frame, data, step);
+ return &frame;
+ }
+ virtual bool open( const char* filename )
+ {
+ close();
- default:
- return false;
+ icvInitFFMPEG();
+ if( !icvCreateFileCapture_FFMPEG_p )
+ return false;
+ ffmpegCapture = icvCreateFileCapture_FFMPEG_p( filename );
+ return ffmpegCapture != 0;
+ }
+ virtual void close()
+ {
+ if( ffmpegCapture && icvReleaseCapture_FFMPEG_p )
+ icvReleaseCapture_FFMPEG_p( &ffmpegCapture );
+ assert( ffmpegCapture == 0 );
+ ffmpegCapture = 0;
}
-
- return true;
-}
-
-
-
-CvCapture* cvCreateFileCapture_FFMPEG( const char* filename )
-{
- CvCapture_FFMPEG* capture = new CvCapture_FFMPEG;
- if( capture->open( filename ))
- return capture;
- delete capture;
- return 0;
-}
-
-
-///////////////// FFMPEG CvVideoWriter implementation //////////////////////////
-class CvVideoWriter_FFMPEG : public CvVideoWriter
-{
-public:
- CvVideoWriter_FFMPEG() { init(); }
- virtual ~CvVideoWriter_FFMPEG() { close(); }
-
- virtual bool open( const char* filename, int fourcc,
- double fps, CvSize frameSize, bool isColor );
- virtual void close();
- virtual bool writeFrame( const IplImage* image );
protected:
- void init();
-
- AVOutputFormat *fmt;
- AVFormatContext *oc;
- uint8_t * outbuf;
- uint32_t outbuf_size;
- FILE * outfile;
- AVFrame * picture;
- AVFrame * input_picture;
- uint8_t * picbuf;
- AVStream * video_st;
- int input_pix_fmt;
- IplImage * temp_image;
-#if defined(HAVE_FFMPEG_SWSCALE)
- struct SwsContext *img_convert_ctx;
-#endif
+ void* ffmpegCapture;
+ IplImage frame;
};
-static const char * icvFFMPEGErrStr(int err)
-{
- switch(err) {
- case AVERROR_NUMEXPECTED:
- return "Incorrect filename syntax";
- case AVERROR_INVALIDDATA:
- return "Invalid data in header";
- case AVERROR_NOFMT:
- return "Unknown format";
- case AVERROR_IO:
- return "I/O error occurred";
- case AVERROR_NOMEM:
- return "Memory allocation error";
- default:
- break;
- }
- return "Unspecified error";
-}
-
-/* function internal to FFMPEG (libavformat/riff.c) to lookup codec id by fourcc tag*/
-extern "C" {
- enum CodecID codec_get_bmp_id(unsigned int tag);
-}
-
-void CvVideoWriter_FFMPEG::init()
-{
- fmt = 0;
- oc = 0;
- outbuf = 0;
- outbuf_size = 0;
- outfile = 0;
- picture = 0;
- input_picture = 0;
- picbuf = 0;
- video_st = 0;
- input_pix_fmt = 0;
- temp_image = 0;
-#if defined(HAVE_FFMPEG_SWSCALE)
- img_convert_ctx = 0;
-#endif
-}
-/**
- * the following function is a modified version of code
- * found in ffmpeg-0.4.9-pre1/output_example.c
- */
-static AVFrame * icv_alloc_picture_FFMPEG(int pix_fmt, int width, int height, bool alloc)
+CvCapture* cvCreateFileCapture_FFMPEG_proxy(const char * filename)
{
- AVFrame * picture;
- uint8_t * picture_buf;
- int size;
-
- picture = avcodec_alloc_frame();
- if (!picture)
- return NULL;
- size = avpicture_get_size( (PixelFormat) pix_fmt, width, height);
- if(alloc){
- picture_buf = (uint8_t *) cvAlloc(size);
- if (!picture_buf)
- {
- av_free(picture);
- return NULL;
- }
- avpicture_fill((AVPicture *)picture, picture_buf,
- (PixelFormat) pix_fmt, width, height);
- }
- else {
- }
- return picture;
-}
-
-/* add a video output stream to the container */
-static AVStream *icv_add_video_stream_FFMPEG(AVFormatContext *oc,
- CodecID codec_id,
- int w, int h, int bitrate,
- double fps, int pixel_format)
-{
- AVCodecContext *c;
- AVStream *st;
- int frame_rate, frame_rate_base;
- AVCodec *codec;
-
-
- st = av_new_stream(oc, 0);
- if (!st) {
- CV_WARN("Could not allocate stream");
- return NULL;
- }
-
-#if LIBAVFORMAT_BUILD > 4628
- c = st->codec;
-#else
- c = &(st->codec);
-#endif
-
-#if LIBAVFORMAT_BUILD > 4621
- c->codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_VIDEO);
-#else
- c->codec_id = oc->oformat->video_codec;
-#endif
-
- if(codec_id != CODEC_ID_NONE){
- c->codec_id = codec_id;
- }
-
- //if(codec_tag) c->codec_tag=codec_tag;
- codec = avcodec_find_encoder(c->codec_id);
-
- c->codec_type = CODEC_TYPE_VIDEO;
-
- /* put sample parameters */
- c->bit_rate = bitrate;
-
- /* resolution must be a multiple of two */
- c->width = w;
- c->height = h;
-
- /* time base: this is the fundamental unit of time (in seconds) in terms
- of which frame timestamps are represented. for fixed-fps content,
- timebase should be 1/framerate and timestamp increments should be
- identically 1. */
- frame_rate=cvRound(fps);
- frame_rate_base=1;
- while (fabs((double)frame_rate/frame_rate_base) - fps > 0.001){
- frame_rate_base*=10;
- frame_rate=cvRound(fps*frame_rate_base);
- }
-#if LIBAVFORMAT_BUILD > 4752
- c->time_base.den = frame_rate;
- c->time_base.num = frame_rate_base;
- /* adjust time base for supported framerates */
- if(codec && codec->supported_framerates){
- const AVRational *p= codec->supported_framerates;
- AVRational req = {frame_rate, frame_rate_base};
- const AVRational *best=NULL;
- AVRational best_error= {INT_MAX, 1};
- for(; p->den!=0; p++){
- AVRational error= av_sub_q(req, *p);
- if(error.num <0) error.num *= -1;
- if(av_cmp_q(error, best_error) < 0){
- best_error= error;
- best= p;
- }
- }
- c->time_base.den= best->num;
- c->time_base.num= best->den;
- }
+ CvCapture_FFMPEG_proxy* result = new CvCapture_FFMPEG_proxy;
+ if( result->open( filename ))
+ return result;
+ delete result;
+#if defined WIN32 || defined _WIN32
+ return cvCreateFileCapture_VFW(filename);
#else
- c->frame_rate = frame_rate;
- c->frame_rate_base = frame_rate_base;
-#endif
-
- c->gop_size = 12; /* emit one intra frame every twelve frames at most */
- c->pix_fmt = (PixelFormat) pixel_format;
-
- if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
- c->max_b_frames = 2;
- }
- if (c->codec_id == CODEC_ID_MPEG1VIDEO || c->codec_id == CODEC_ID_MSMPEG4V3){
- /* needed to avoid using macroblocks in which some coeffs overflow
- this doesnt happen with normal video, it just happens here as the
- motion of the chroma plane doesnt match the luma plane */
- /* avoid FFMPEG warning 'clipping 1 dct coefficients...' */
- c->mb_decision=2;
- }
-#if LIBAVCODEC_VERSION_INT>0x000409
- // some formats want stream headers to be seperate
- if(oc->oformat->flags & AVFMT_GLOBALHEADER)
- {
- c->flags |= CODEC_FLAG_GLOBAL_HEADER;
- }
-#endif
-
- return st;
+ return 0;
+#endif
}
-int icv_av_write_frame_FFMPEG( AVFormatContext * oc, AVStream * video_st, uint8_t * outbuf, uint32_t outbuf_size, AVFrame * picture ){
- CV_FUNCNAME("icv_av_write_frame_FFMPEG");
-#if LIBAVFORMAT_BUILD > 4628
- AVCodecContext * c = video_st->codec;
-#else
- AVCodecContext * c = &(video_st->codec);
-#endif
- int out_size;
- int ret;
-
- __BEGIN__;
-
- if (oc->oformat->flags & AVFMT_RAWPICTURE) {
- /* raw video case. The API will change slightly in the near
- futur for that */
- AVPacket pkt;
- av_init_packet(&pkt);
-
- pkt.flags |= PKT_FLAG_KEY;
- pkt.stream_index= video_st->index;
- pkt.data= (uint8_t *)picture;
- pkt.size= sizeof(AVPicture);
-
- ret = av_write_frame(oc, &pkt);
- } else {
- /* encode the image */
- out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
- /* if zero size, it means the image was buffered */
- if (out_size > 0) {
- AVPacket pkt;
- av_init_packet(&pkt);
-
-#if LIBAVFORMAT_BUILD > 4752
- pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st->time_base);
-#else
- pkt.pts = c->coded_frame->pts;
-#endif
- if(c->coded_frame->key_frame)
- pkt.flags |= PKT_FLAG_KEY;
- pkt.stream_index= video_st->index;
- pkt.data= outbuf;
- pkt.size= out_size;
-
- /* write the compressed frame in the media file */
- ret = av_write_frame(oc, &pkt);
- } else {
- ret = 0;
- }
- }
- if (ret != 0) {
- CV_ERROR(CV_StsError, "Error while writing video frame");
- }
-
- __END__;
- return CV_StsOk;
-}
-
-/// write a frame with FFMPEG
-bool CvVideoWriter_FFMPEG::writeFrame( const IplImage * image )
+class CvVideoWriter_FFMPEG_proxy : public CvVideoWriter
{
- bool ret = false;
-
- CV_FUNCNAME("CvVideoWriter_FFMPEG::writerFrame");
-
- __BEGIN__;
-
- // typecast from opaque data type to implemented struct
-#if LIBAVFORMAT_BUILD > 4628
- AVCodecContext *c = video_st->codec;
-#else
- AVCodecContext *c = &(video_st->codec);
-#endif
+public:
+ CvVideoWriter_FFMPEG_proxy() { ffmpegWriter = 0; }
+ virtual ~CvVideoWriter_FFMPEG_proxy() { close(); }
-#if LIBAVFORMAT_BUILD < 5231
- // It is not needed in the latest versions of the ffmpeg
- if( c->codec_id == CODEC_ID_RAWVIDEO && image->origin != IPL_ORIGIN_BL )
+ virtual bool writeFrame( const IplImage* image )
{
- if( !temp_image )
- temp_image = cvCreateImage( cvGetSize(image),
- image->depth, image->nChannels );
- cvFlip( image, temp_image, 0 );
- image = temp_image;
- }
-#endif
+ if(!ffmpegWriter)
+ return false;
+ CV_Assert(image->depth == 8);
- // check parameters
- if (input_pix_fmt == PIX_FMT_BGR24) {
- if (image->nChannels != 3 || image->depth != IPL_DEPTH_8U) {
- CV_ERROR(CV_StsUnsupportedFormat, "cvWriteFrame() needs images with depth = IPL_DEPTH_8U and nChannels = 3.");
- }
- }
- else if (input_pix_fmt == PIX_FMT_GRAY8) {
- if (image->nChannels != 1 || image->depth != IPL_DEPTH_8U) {
- CV_ERROR(CV_StsUnsupportedFormat, "cvWriteFrame() needs images with depth = IPL_DEPTH_8U and nChannels = 1.");
- }
+ return icvWriteFrame_FFMPEG_p(ffmpegWriter, (const uchar*)image->imageData,
+ image->widthStep, image->width, image->height, image->nChannels, image->origin) !=0;
}
- else {
- assert(false);
+ virtual bool open( const char* filename, int fourcc, double fps, CvSize frameSize, bool isColor )
+ {
+ close();
+ icvInitFFMPEG();
+ if( !icvCreateVideoWriter_FFMPEG_p )
+ return false;
+ ffmpegWriter = icvCreateVideoWriter_FFMPEG_p( filename, fourcc, fps, frameSize.width, frameSize.height, isColor );
+ return ffmpegWriter != 0;
}
- // check if buffer sizes match, i.e. image has expected format (size, channels, bitdepth, alignment)
-#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(37<<8)+0)
- assert (image->imageSize == avpicture_get_size( (PixelFormat)input_pix_fmt, image->width, image->height ));
-#else
- assert (image->imageSize == avpicture_get_size( input_pix_fmt, image->width, image->height ));
-#endif
-
- if ( c->pix_fmt != input_pix_fmt ) {
- assert( input_picture );
- // let input_picture point to the raw data buffer of 'image'
- avpicture_fill((AVPicture *)input_picture, (uint8_t *) image->imageData,
- (PixelFormat)input_pix_fmt, image->width, image->height);
-
-#if !defined(HAVE_FFMPEG_SWSCALE)
- // convert to the color format needed by the codec
- if( img_convert((AVPicture *)picture, c->pix_fmt,
- (AVPicture *)input_picture, (PixelFormat)input_pix_fmt,
- image->width, image->height) < 0){
- CV_ERROR(CV_StsUnsupportedFormat, "FFMPEG::img_convert pixel format conversion from BGR24 not handled");
- }
-#else
- img_convert_ctx = sws_getContext(image->width,
- image->height,
- PIX_FMT_BGR24,
- c->width,
- c->height,
- c->pix_fmt,
- SWS_BICUBIC,
- NULL, NULL, NULL);
-
- if ( sws_scale(img_convert_ctx, input_picture->data,
- input_picture->linesize, 0,
- image->height,
- picture->data, picture->linesize) < 0 )
- {
- CV_ERROR(CV_StsUnsupportedFormat, "FFMPEG::img_convert pixel format conversion from BGR24 not handled");
- }
- sws_freeContext(img_convert_ctx);
-#endif
- }
- else{
- avpicture_fill((AVPicture *)picture, (uint8_t *) image->imageData,
- (PixelFormat)input_pix_fmt, image->width, image->height);
- }
-
- ret = icv_av_write_frame_FFMPEG( oc, video_st, outbuf, outbuf_size, picture) >= 0;
-
- __END__;
- return ret;
-}
-
-/// close video output stream and free associated memory
-void CvVideoWriter_FFMPEG::close()
-{
- unsigned i;
-
- // nothing to do if already released
- if ( !picture )
- return;
-
- /* no more frame to compress. The codec has a latency of a few
- frames if using B frames, so we get the last frames by
- passing the same picture again */
- // TODO -- do we need to account for latency here?
-
- /* write the trailer, if any */
- av_write_trailer(oc);
-
- // free pictures
-#if LIBAVFORMAT_BUILD > 4628
- if( video_st->codec->pix_fmt != input_pix_fmt){
-#else
- if( video_st->codec.pix_fmt != input_pix_fmt){
-#endif
- cvFree(&(picture->data[0]));
- }
- av_free(picture);
-
- if (input_picture) {
- av_free(input_picture);
+ virtual void close()
+ {
+ if( ffmpegWriter && icvReleaseVideoWriter_FFMPEG_p )
+ icvReleaseVideoWriter_FFMPEG_p( &ffmpegWriter );
+ assert( ffmpegWriter == 0 );
+ ffmpegWriter = 0;
}
- /* close codec */
-#if LIBAVFORMAT_BUILD > 4628
- avcodec_close(video_st->codec);
-#else
- avcodec_close(&(video_st->codec));
-#endif
-
- av_free(outbuf);
-
- /* free the streams */
- for(i = 0; i < oc->nb_streams; i++) {
- av_freep(&oc->streams[i]->codec);
- av_freep(&oc->streams[i]);
- }
-
- if (!(fmt->flags & AVFMT_NOFILE)) {
- /* close the output file */
-
-
-#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(49<<8)+0)
- url_fclose(oc->pb);
-#else
- url_fclose(&oc->pb);
-#endif
-
- }
-
- /* free the stream */
- av_free(oc);
-
- cvReleaseImage( &temp_image );
+protected:
+ void* ffmpegWriter;
+};
- init();
-}
-/// Create a video writer object that uses FFMPEG
-bool CvVideoWriter_FFMPEG::open( const char * filename, int fourcc,
- double fps, CvSize frameSize, bool is_color )
+CvVideoWriter* cvCreateVideoWriter_FFMPEG_proxy( const char* filename, int fourcc,
+ double fps, CvSize frameSize, int isColor )
{
- CodecID codec_id = CODEC_ID_NONE;
- int err, codec_pix_fmt, bitrate_scale=64;
-
- close();
-
- // check arguments
- assert (filename);
- assert (fps > 0);
- assert (frameSize.width > 0 && frameSize.height > 0);
-
- // tell FFMPEG to register codecs
- av_register_all ();
+ CvVideoWriter_FFMPEG_proxy* result = new CvVideoWriter_FFMPEG_proxy;
- /* auto detect the output format from the name and fourcc code. */
- fmt = guess_format(NULL, filename, NULL);
- if (!fmt)
- return false;
-
- /* determine optimal pixel format */
- if (is_color) {
- input_pix_fmt = PIX_FMT_BGR24;
- }
- else {
- input_pix_fmt = PIX_FMT_GRAY8;
- }
-
- /* Lookup codec_id for given fourcc */
-#if LIBAVCODEC_VERSION_INT<((51<<16)+(49<<8)+0)
- if( (codec_id = codec_get_bmp_id( fourcc )) == CODEC_ID_NONE )
- return false;
-#else
- const struct AVCodecTag * tags[] = { codec_bmp_tags, NULL};
- if( (codec_id = av_codec_get_id(tags, fourcc)) == CODEC_ID_NONE )
- return false;
-#endif
-
- // alloc memory for context
- oc = av_alloc_format_context();
- assert (oc);
-
- /* set file name */
- oc->oformat = fmt;
- snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
-
- /* set some options */
- oc->max_delay = (int)(0.7*AV_TIME_BASE); /* This reduces buffer underrun warnings with MPEG */
-
- // set a few optimal pixel formats for lossless codecs of interest..
- switch (codec_id) {
-#if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0)
- case CODEC_ID_JPEGLS:
- // BGR24 or GRAY8 depending on is_color...
- codec_pix_fmt = input_pix_fmt;
- break;
-#endif
- case CODEC_ID_HUFFYUV:
- codec_pix_fmt = PIX_FMT_YUV422P;
- break;
- case CODEC_ID_MJPEG:
- case CODEC_ID_LJPEG:
- codec_pix_fmt = PIX_FMT_YUVJ420P;
- bitrate_scale = 128;
- break;
- case CODEC_ID_RAWVIDEO:
- codec_pix_fmt = input_pix_fmt;
- break;
- default:
- // good for lossy formats, MPEG, etc.
- codec_pix_fmt = PIX_FMT_YUV420P;
- break;
- }
-
- // TODO -- safe to ignore output audio stream?
- video_st = icv_add_video_stream_FFMPEG(oc, codec_id,
- frameSize.width, frameSize.height, frameSize.width*frameSize.height*bitrate_scale,
- fps, codec_pix_fmt);
-
-
- /* set the output parameters (must be done even if no
- parameters). */
- if (av_set_parameters(oc, NULL) < 0) {
- CV_Error(CV_StsBadArg, "Invalid output format parameters");
- }
-
- dump_format(oc, 0, filename, 1);
-
- /* now that all the parameters are set, we can open the audio and
- video codecs and allocate the necessary encode buffers */
- if (!video_st){
- CV_Error(CV_StsBadArg, "Couldn't open video stream");
- }
-
- AVCodec *codec;
- AVCodecContext *c;
-
-#if LIBAVFORMAT_BUILD > 4628
- c = (video_st->codec);
+ if( result->open( filename, fourcc, fps, frameSize, isColor != 0 ))
+ return result;
+ delete result;
+#if defined WIN32 || defined _WIN32
+ return cvCreateVideoWriter_VFW(filename, fourcc, fps, frameSize, isColor);
#else
- c = &(video_st->codec);
-#endif
-
- c->codec_tag = fourcc;
- /* find the video encoder */
- codec = avcodec_find_encoder(c->codec_id);
- if (!codec) {
- CV_Error(CV_StsBadArg, "codec not found");
- }
-
- c->bit_rate_tolerance = c->bit_rate;
-
- /* open the codec */
- if ( (err=avcodec_open(c, codec)) < 0) {
- char errtext[256];
- sprintf(errtext, "Could not open codec '%s': %s", codec->name, icvFFMPEGErrStr(err));
- CV_Error(CV_StsBadArg, errtext);
- }
-
- outbuf = NULL;
-
- if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
- /* allocate output buffer */
- /* assume we will never get codec output with more than 4 bytes per pixel... */
- outbuf_size = frameSize.width*frameSize.height*4;
- outbuf = (uint8_t *) av_malloc(outbuf_size);
- }
-
- bool need_color_convert;
- need_color_convert = (c->pix_fmt != input_pix_fmt);
-
- /* allocate the encoded raw picture */
- picture = icv_alloc_picture_FFMPEG(c->pix_fmt, c->width, c->height, need_color_convert);
- if (!picture) {
- CV_Error(CV_StsNoMem, "Could not allocate picture");
- }
-
- /* if the output format is not our input format, then a temporary
- picture of the input format is needed too. It is then converted
- to the required output format */
- input_picture = NULL;
- if ( need_color_convert ) {
- input_picture = icv_alloc_picture_FFMPEG(input_pix_fmt, c->width, c->height, false);
- if (!input_picture) {
- CV_Error(CV_StsNoMem, "Could not allocate picture");
- }
- }
-
- /* open the output file, if needed */
- if (!(fmt->flags & AVFMT_NOFILE)) {
- if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
- CV_Error(CV_StsBadArg, "Couldn't open output file for writing");
- }
- }
-
- /* write the stream header, if any */
- av_write_header( oc );
-
- return true;
-}
-
-CvVideoWriter* cvCreateVideoWriter_FFMPEG( const char* filename, int fourcc, double fps,
- CvSize frameSize, int isColor )
-{
- CvVideoWriter_FFMPEG* writer = new CvVideoWriter_FFMPEG;
- if( writer->open( filename, fourcc, fps, frameSize, isColor != 0 ))
- return writer;
- delete writer;
return 0;
+#endif
}
--- /dev/null
+#ifndef __OPENCV_FFMPEG_H__
+#define __OPENCV_FFMPEG_H__
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#if defined WIN32 || defined _WIN32
+#define OPENCV_FFMPEG_API __declspec(dllexport)
+#else
+#define OPENCV_FFMPEG_API
+#endif
+
+enum
+{
+ CV_FFMPEG_CAP_PROP_POS_MSEC=0,
+ CV_FFMPEG_CAP_PROP_POS_FRAMES=1,
+ CV_FFMPEG_CAP_PROP_POS_AVI_RATIO=2,
+ CV_FFMPEG_CAP_PROP_FRAME_WIDTH=3,
+ CV_FFMPEG_CAP_PROP_FRAME_HEIGHT=4,
+ CV_FFMPEG_CAP_PROP_FPS=5,
+ CV_FFMPEG_CAP_PROP_FOURCC=6,
+ CV_FFMPEG_CAP_PROP_FRAME_COUNT=7
+};
+
+
+OPENCV_FFMPEG_API struct CvCapture_FFMPEG* cvCreateFileCapture_FFMPEG(const char* filename);
+OPENCV_FFMPEG_API int cvSetCaptureProperty_FFMPEG(struct CvCapture_FFMPEG* cap,
+ int prop, double value);
+OPENCV_FFMPEG_API double cvGetCaptureProperty_FFMPEG(struct CvCapture_FFMPEG* cap, int prop);
+OPENCV_FFMPEG_API int cvGrabFrame_FFMPEG(struct CvCapture_FFMPEG* cap);
+OPENCV_FFMPEG_API int cvRetrieveFrame_FFMPEG(CvCapture_FFMPEG* capture, unsigned char** data,
+ int* step, int* width, int* height, int* cn);
+OPENCV_FFMPEG_API void cvReleaseCapture_FFMPEG(struct CvCapture_FFMPEG** cap);
+
+OPENCV_FFMPEG_API struct CvVideoWriter_FFMPEG* cvCreateVideoWriter_FFMPEG(const char* filename,
+ int fourcc, double fps, int width, int height, int isColor );
+
+OPENCV_FFMPEG_API int cvWriteFrame_FFMPEG(struct CvVideoWriter_FFMPEG* writer, const unsigned char* data,
+ int step, int width, int height, int cn, int origin);
+
+OPENCV_FFMPEG_API void cvReleaseVideoWriter_FFMPEG(struct CvVideoWriter_FFMPEG** writer);
+
+typedef void* (*CvCreateFileCapture_Plugin)( const char* filename );
+typedef void* (*CvCreateCameraCapture_Plugin)( int index );
+typedef int (*CvGrabFrame_Plugin)( void* capture_handle );
+typedef int (*CvRetrieveFrame_Plugin)( void* capture_handle, unsigned char** data, int* step,
+ int* width, int* height, int* cn );
+typedef int (*CvSetCaptureProperty_Plugin)( void* capture_handle, int prop_id, double value );
+typedef double (*CvGetCaptureProperty_Plugin)( void* capture_handle, int prop_id );
+typedef void (*CvReleaseCapture_Plugin)( void** capture_handle );
+typedef void* (*CvCreateVideoWriter_Plugin)( const char* filename, int fourcc,
+ double fps, int width, int height, int iscolor );
+typedef int (*CvWriteFrame_Plugin)( void* writer_handle, const unsigned char* data, int step,
+ int width, int height, int cn, int origin);
+typedef void (*CvReleaseVideoWriter_Plugin)( void** writer );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
--- /dev/null
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+// By downloading, copying, installing or using the software you agree to this license.
+// If you do not agree to this license, do not download, install,
+// copy or use the software.
+//
+//
+// Intel License Agreement
+// For Open Source Computer Vision Library
+//
+// Copyright (C) 2000, Intel Corporation, all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// * Redistribution's of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// * Redistribution's in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+//
+// * The name of Intel Corporation may not be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "cap_ffmpeg_api.hpp"
+#include <assert.h>
+
+#if defined _MSC_VER && _MSC_VER >= 1200
+#pragma warning( disable: 4244 4510 4512 4610 )
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !defined(WIN32) || defined(__MINGW32__)
+// some versions of FFMPEG assume a C99 compiler, and don't define INT64_C
+#if !defined INT64_C || !defined UINT64_C
+#define INT64_C
+#define UINT64_C
+#define __STDC_CONSTANT_MACROS
+// force re-inclusion of stdint.h to get INT64_C macro
+#undef _STDINT_H
+#include <stdint.h>
+#endif
+#include <errno.h>
+#endif
+
+#ifdef WIN32
+ #define HAVE_FFMPEG_SWSCALE 1
+ #include <libavformat/avformat.h>
+ #include <libavcodec/avcodec.h>
+ #include <libswscale/swscale.h>
+#else
+
+// if the header path is not specified explicitly, let's deduce it
+#if !defined HAVE_FFMPEG_AVCODEC_H && !defined HAVE_LIBAVCODEC_AVCODEC_H
+
+#if defined(HAVE_GENTOO_FFMPEG)
+ #define HAVE_LIBAVCODEC_AVCODEC_H 1
+ #define HAVE_LIBAVFORMAT_AVFORMAT_H 1
+ #if defined(HAVE_FFMPEG_SWSCALE)
+ #define HAVE_LIBSWSCALE_SWSCALE_H 1
+ #endif
+#elif defined HAVE_FFMPEG
+ #define HAVE_FFMPEG_AVCODEC_H 1
+ #define HAVE_FFMPEG_AVFORMAT_H 1
+ #if defined(HAVE_FFMPEG_SWSCALE)
+ #define HAVE_FFMPEG_SWSCALE_H 1
+ #endif
+#endif
+
+#endif
+
+#if defined(HAVE_FFMPEG_AVCODEC_H)
+ #include <ffmpeg/avcodec.h>
+#endif
+#if defined(HAVE_FFMPEG_AVFORMAT_H)
+ #include <ffmpeg/avformat.h>
+#endif
+#if defined(HAVE_FFMPEG_SWSCALE_H)
+ #include <ffmpeg/swscale.h>
+#endif
+
+#if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
+ #include <libavformat/avformat.h>
+#endif
+#if defined(HAVE_LIBAVCODEC_AVCODEC_H)
+ #include <libavcodec/avcodec.h>
+#endif
+#if defined(HAVE_LIBSWSCALE_SWSCALE_H)
+ #include <libswscale/swscale.h>
+#endif
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#if defined _MSC_VER && _MSC_VER >= 1200
+#pragma warning( default: 4244 4510 4512 4610 )
+#endif
+
+#ifdef NDEBUG
+#define CV_WARN(message)
+#else
+#define CV_WARN(message) fprintf(stderr, "warning: %s (%s:%d)\n", message, __FILE__, __LINE__)
+#endif
+
+
+#ifndef MKTAG
+#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
+#endif
+
+/* PIX_FMT_RGBA32 macro changed in newer ffmpeg versions */
+#ifndef PIX_FMT_RGBA32
+#define PIX_FMT_RGBA32 PIX_FMT_RGB32
+#endif
+
+
+
+char * FOURCC2str( int fourcc )
+{
+ char * mystr=(char*)malloc(5);
+ mystr[0]=(char)((fourcc )&255);
+ mystr[1]=(char)((fourcc>> 8)&255);
+ mystr[2]=(char)((fourcc>>16)&255);
+ mystr[3]=(char)((fourcc>>24)&255);
+ mystr[4]=0;
+ return mystr;
+}
+
+
+// required to look up the correct codec ID depending on the FOURCC code,
+// this is just a snipped from the file riff.c from ffmpeg/libavformat
+typedef struct AVCodecTag {
+ int id;
+ unsigned int tag;
+} AVCodecTag;
+
+const AVCodecTag codec_bmp_tags[] = {
+ { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },
+ { CODEC_ID_H264, MKTAG('h', '2', '6', '4') },
+ { CODEC_ID_H264, MKTAG('X', '2', '6', '4') },
+ { CODEC_ID_H264, MKTAG('x', '2', '6', '4') },
+ { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
+ { CODEC_ID_H264, MKTAG('V', 'S', 'S', 'H') },
+
+ { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
+ { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
+ { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
+ { CODEC_ID_H261, MKTAG('H', '2', '6', '1') },
+
+ /* added based on MPlayer */
+ { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
+ { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
+
+ { CODEC_ID_MPEG4, MKTAG('F', 'M', 'P', '4') },
+ { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
+ { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
+ { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
+ { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
+ { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
+ { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
+
+ /* added based on MPlayer */
+ { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
+ { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
+ { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
+ { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
+ { CODEC_ID_MPEG4, MKTAG('W', 'V', '1', 'F') },
+ { CODEC_ID_MPEG4, MKTAG('S', 'E', 'D', 'G') },
+
+ { CODEC_ID_MPEG4, MKTAG('R', 'M', 'P', '4') },
+
+ { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
+ { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
+
+ /* added based on MPlayer */
+ { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
+ { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
+
+ { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
+
+ /* added based on MPlayer */
+ { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
+
+ { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
+
+ { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
+
+ /* added based on MPlayer */
+ { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
+ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
+ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
+ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
+ { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
+ { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
+ { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
+ { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', 'g', '2') },
+ { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'P', 'E', 'G') },
+ { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
+ { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
+ { CODEC_ID_MPEG1VIDEO, 0x10000001 },
+ { CODEC_ID_MPEG2VIDEO, 0x10000002 },
+ { CODEC_ID_MPEG2VIDEO, MKTAG('D', 'V', 'R', ' ') },
+ { CODEC_ID_MPEG2VIDEO, MKTAG('M', 'M', 'E', 'S') },
+ { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
+ { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
+ { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
+ { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
+ { CODEC_ID_MJPEG, MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - decoder */
+ { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') },
+ { CODEC_ID_MJPEG, MKTAG('I', 'J', 'P', 'G') },
+ { CODEC_ID_MJPEG, MKTAG('A', 'V', 'R', 'n') },
+ { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
+ { CODEC_ID_FFVHUFF, MKTAG('F', 'F', 'V', 'H') },
+ { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
+ { CODEC_ID_RAWVIDEO, 0 },
+ { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
+ { CODEC_ID_RAWVIDEO, MKTAG('Y', 'U', 'Y', '2') },
+ { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
+ { CODEC_ID_RAWVIDEO, MKTAG('Y', 'V', '1', '2') },
+ { CODEC_ID_RAWVIDEO, MKTAG('U', 'Y', 'V', 'Y') },
+ { CODEC_ID_RAWVIDEO, MKTAG('I', 'Y', 'U', 'V') },
+ { CODEC_ID_RAWVIDEO, MKTAG('Y', '8', '0', '0') },
+ { CODEC_ID_RAWVIDEO, MKTAG('H', 'D', 'Y', 'C') },
+ { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
+ { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
+ { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
+ { CODEC_ID_VP3, MKTAG('V', 'P', '3', '0') },
+ { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
+ { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
+ { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
+ { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
+ { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
+ { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },
+ { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },
+ { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },
+ { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },
+ { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },
+ { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },
+ { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },
+ { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },
+ { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },
+ { CODEC_ID_TRUEMOTION1, MKTAG('D', 'U', 'C', 'K') },
+ { CODEC_ID_MSZH, MKTAG('M', 'S', 'Z', 'H') },
+ { CODEC_ID_ZLIB, MKTAG('Z', 'L', 'I', 'B') },
+ { CODEC_ID_SNOW, MKTAG('S', 'N', 'O', 'W') },
+ { CODEC_ID_4XM, MKTAG('4', 'X', 'M', 'V') },
+ { CODEC_ID_FLV1, MKTAG('F', 'L', 'V', '1') },
+ { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') },
+ { CODEC_ID_TSCC, MKTAG('t', 's', 'c', 'c') },
+ { CODEC_ID_ULTI, MKTAG('U', 'L', 'T', 'I') },
+ { CODEC_ID_VIXL, MKTAG('V', 'I', 'X', 'L') },
+ { CODEC_ID_QPEG, MKTAG('Q', 'P', 'E', 'G') },
+ { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '0') },
+ { CODEC_ID_QPEG, MKTAG('Q', '1', '.', '1') },
+ { CODEC_ID_WMV3, MKTAG('W', 'M', 'V', '3') },
+ { CODEC_ID_LOCO, MKTAG('L', 'O', 'C', 'O') },
+ { CODEC_ID_THEORA, MKTAG('t', 'h', 'e', 'o') },
+#if LIBAVCODEC_VERSION_INT>0x000409
+ { CODEC_ID_WNV1, MKTAG('W', 'N', 'V', '1') },
+ { CODEC_ID_AASC, MKTAG('A', 'A', 'S', 'C') },
+ { CODEC_ID_INDEO2, MKTAG('R', 'T', '2', '1') },
+ { CODEC_ID_FRAPS, MKTAG('F', 'P', 'S', '1') },
+ { CODEC_ID_TRUEMOTION2, MKTAG('T', 'M', '2', '0') },
+#endif
+#if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0)
+ { CODEC_ID_FLASHSV, MKTAG('F', 'S', 'V', '1') },
+ { CODEC_ID_JPEGLS,MKTAG('M', 'J', 'L', 'S') }, /* JPEG-LS custom FOURCC for avi - encoder */
+ { CODEC_ID_VC1, MKTAG('W', 'V', 'C', '1') },
+ { CODEC_ID_VC1, MKTAG('W', 'M', 'V', 'A') },
+ { CODEC_ID_CSCD, MKTAG('C', 'S', 'C', 'D') },
+ { CODEC_ID_ZMBV, MKTAG('Z', 'M', 'B', 'V') },
+ { CODEC_ID_KMVC, MKTAG('K', 'M', 'V', 'C') },
+#endif
+#if LIBAVCODEC_VERSION_INT>((51<<16)+(11<<8)+0)
+ { CODEC_ID_VP5, MKTAG('V', 'P', '5', '0') },
+ { CODEC_ID_VP6, MKTAG('V', 'P', '6', '0') },
+ { CODEC_ID_VP6, MKTAG('V', 'P', '6', '1') },
+ { CODEC_ID_VP6, MKTAG('V', 'P', '6', '2') },
+ { CODEC_ID_VP6F, MKTAG('V', 'P', '6', 'F') },
+ { CODEC_ID_JPEG2000, MKTAG('M', 'J', '2', 'C') },
+ { CODEC_ID_VMNC, MKTAG('V', 'M', 'n', 'c') },
+#endif
+#if LIBAVCODEC_VERSION_INT>=((51<<16)+(49<<8)+0)
+// this tag seems not to exist in older versions of FFMPEG
+ { CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') },
+#endif
+ { CODEC_ID_NONE, 0 },
+};
+
+
+struct Image_FFMPEG
+{
+ unsigned char* data;
+ int step;
+ int width;
+ int height;
+ int cn;
+};
+
+
+inline void _opencv_ffmpeg_free(void** ptr)
+{
+ if(*ptr) free(*ptr);
+ *ptr = 0;
+}
+
+
+struct CvCapture_FFMPEG
+{
+ bool open( const char* filename );
+ void close();
+
+ double getProperty(int);
+ bool setProperty(int, double);
+ bool grabFrame();
+ bool retrieveFrame(int, unsigned char** data, int* step, int* width, int* height, int* cn);
+
+ void init();
+ bool reopen();
+ bool slowSeek( int framenumber );
+
+ AVFormatContext * ic;
+ int video_stream;
+ AVStream * video_st;
+ AVFrame * picture;
+ int64_t picture_pts;
+ AVFrame rgb_picture;
+ AVPacket packet;
+ Image_FFMPEG frame;
+#if defined(HAVE_FFMPEG_SWSCALE)
+ struct SwsContext *img_convert_ctx;
+#endif
+/*
+ 'filename' contains the filename of the videosource,
+ 'filename==NULL' indicates that ffmpeg's seek support works
+ for the particular file.
+ 'filename!=NULL' indicates that the slow fallback function is used for seeking,
+ and so the filename is needed to reopen the file on backward seeking.
+*/
+ char * filename;
+};
+
+
+void CvCapture_FFMPEG::init()
+{
+ ic = 0;
+ video_stream = -1;
+ video_st = 0;
+ picture = 0;
+ picture_pts = 0;
+ memset( &rgb_picture, 0, sizeof(rgb_picture) );
+ memset( &frame, 0, sizeof(frame) );
+ filename = 0;
+ packet.data = NULL;
+#if defined(HAVE_FFMPEG_SWSCALE)
+ img_convert_ctx = 0;
+#endif
+}
+
+
+void CvCapture_FFMPEG::close()
+{
+ if( picture )
+ av_free(picture);
+
+ if( video_st )
+ {
+#if LIBAVFORMAT_BUILD > 4628
+ avcodec_close( video_st->codec );
+#else
+ avcodec_close( &video_st->codec );
+#endif
+ video_st = NULL;
+ }
+
+ if( ic )
+ {
+ av_close_input_file(ic);
+ ic = NULL;
+ }
+
+ if( rgb_picture.data[0] )
+ {
+ free( rgb_picture.data[0] );
+ rgb_picture.data[0] = 0;
+ }
+
+ // free last packet if exist
+ if (packet.data) {
+ av_free_packet (&packet);
+ }
+
+
+ init();
+}
+
+
+/*
+ Used to reopen a video if the slower fallback function for seeking is used.
+*/
+bool CvCapture_FFMPEG::reopen()
+{
+ if ( filename==NULL ) return false;
+
+#if LIBAVFORMAT_BUILD > 4628
+ avcodec_close( video_st->codec );
+#else
+ avcodec_close( &video_st->codec );
+#endif
+ av_close_input_file(ic);
+
+ // reopen video
+ av_open_input_file(&ic, filename, NULL, 0, NULL);
+ av_find_stream_info(ic);
+#if LIBAVFORMAT_BUILD > 4628
+ AVCodecContext *enc = ic->streams[video_stream]->codec;
+#else
+ AVCodecContext *enc = &ic->streams[video_stream]->codec;
+#endif
+ AVCodec *codec = avcodec_find_decoder(enc->codec_id);
+ avcodec_open(enc, codec);
+ video_st = ic->streams[video_stream];
+
+ // reset framenumber to zero
+ picture_pts=0;
+
+ return true;
+}
+
+#ifndef AVSEEK_FLAG_FRAME
+ #define AVSEEK_FLAG_FRAME 0
+#endif
+
+bool CvCapture_FFMPEG::open( const char* _filename )
+{
+ unsigned i;
+ bool valid = false;
+
+ close();
+
+ /* register all codecs, demux and protocols */
+ av_register_all();
+
+#ifndef _DEBUG
+ // av_log_level = AV_LOG_QUIET;
+#endif
+
+ int err = av_open_input_file(&ic, _filename, NULL, 0, NULL);
+ if (err < 0) {
+ CV_WARN("Error opening file");
+ goto exit_func;
+ }
+ err = av_find_stream_info(ic);
+ if (err < 0) {
+ CV_WARN("Could not find codec parameters");
+ goto exit_func;
+ }
+ for(i = 0; i < ic->nb_streams; i++) {
+#if LIBAVFORMAT_BUILD > 4628
+ AVCodecContext *enc = ic->streams[i]->codec;
+#else
+ AVCodecContext *enc = &ic->streams[i]->codec;
+#endif
+
+ if( CODEC_TYPE_VIDEO == enc->codec_type && video_stream < 0) {
+ AVCodec *codec = avcodec_find_decoder(enc->codec_id);
+ if (!codec ||
+ avcodec_open(enc, codec) < 0)
+ goto exit_func;
+ video_stream = i;
+ video_st = ic->streams[i];
+ picture = avcodec_alloc_frame();
+
+ rgb_picture.data[0] = (uint8_t*)malloc(
+ avpicture_get_size( PIX_FMT_BGR24,
+ enc->width, enc->height ));
+ avpicture_fill( (AVPicture*)&rgb_picture, rgb_picture.data[0],
+ PIX_FMT_BGR24, enc->width, enc->height );
+
+ frame.width = enc->width;
+ frame.height = enc->height;
+ frame.cn = 3;
+ frame.step = rgb_picture.linesize[0];
+ frame.data = rgb_picture.data[0];
+ break;
+ }
+ }
+
+ if(video_stream >= 0) valid = true;
+
+ // perform check if source is seekable via ffmpeg's seek function av_seek_frame(...)
+ err = av_seek_frame(ic, video_stream, 10, 0);
+ if (err < 0)
+ {
+ filename=(char*)malloc(strlen(_filename)+1);
+ strcpy(filename, _filename);
+ // reopen videofile to 'seek' back to first frame
+ reopen();
+ }
+ else
+ {
+ // seek seems to work, so we don't need the filename,
+ // but we still need to seek back to filestart
+ filename=NULL;
+ int64_t ts = video_st->first_dts;
+ int flags = AVSEEK_FLAG_FRAME | AVSEEK_FLAG_BACKWARD;
+ av_seek_frame(ic, video_stream, ts, flags);
+ }
+exit_func:
+
+ if( !valid )
+ close();
+
+ return valid;
+}
+
+
+bool CvCapture_FFMPEG::grabFrame()
+{
+ bool valid = false;
+ static bool bFirstTime = true;
+ int got_picture;
+
+ // First time we're called, set packet.data to NULL to indicate it
+ // doesn't have to be freed
+ if (bFirstTime) {
+ bFirstTime = false;
+ packet.data = NULL;
+ }
+
+ if( !ic || !video_st )
+ return false;
+
+ // free last packet if exist
+ if (packet.data != NULL) {
+ av_free_packet (&packet);
+ }
+
+ // get the next frame
+ while (!valid) {
+ int ret = av_read_frame(ic, &packet);
+ if (ret == AVERROR(EAGAIN))
+ continue;
+ if (ret < 0)
+ break;
+
+ if( packet.stream_index != video_stream ) {
+ av_free_packet (&packet);
+ continue;
+ }
+
+#if LIBAVFORMAT_BUILD > 4628
+ avcodec_decode_video(video_st->codec,
+ picture, &got_picture,
+ packet.data, packet.size);
+#else
+ avcodec_decode_video(&video_st->codec,
+ picture, &got_picture,
+ packet.data, packet.size);
+#endif
+
+ if (got_picture) {
+ // we have a new picture, so memorize it
+ picture_pts = packet.pts;
+ valid = 1;
+ }
+ }
+
+ // return if we have a new picture or not
+ return valid;
+}
+
+
+bool CvCapture_FFMPEG::retrieveFrame(int, unsigned char** data, int* step, int* width, int* height, int* cn)
+{
+ if( !video_st || !picture->data[0] )
+ return false;
+
+#if !defined(HAVE_FFMPEG_SWSCALE)
+#if LIBAVFORMAT_BUILD > 4628
+ img_convert( (AVPicture*)&rgb_picture, PIX_FMT_BGR24,
+ (AVPicture*)picture,
+ video_st->codec->pix_fmt,
+ video_st->codec->width,
+ video_st->codec->height );
+#else
+ img_convert( (AVPicture*)&rgb_picture, PIX_FMT_BGR24,
+ (AVPicture*)picture,
+ video_st->codec.pix_fmt,
+ video_st->codec.width,
+ video_st->codec.height );
+#endif
+#else
+ img_convert_ctx = sws_getContext(video_st->codec->width,
+ video_st->codec->height,
+ video_st->codec->pix_fmt,
+ video_st->codec->width,
+ video_st->codec->height,
+ PIX_FMT_BGR24,
+ SWS_BICUBIC,
+ NULL, NULL, NULL);
+
+ sws_scale(img_convert_ctx, picture->data,
+ picture->linesize, 0,
+ video_st->codec->height,
+ rgb_picture.data, rgb_picture.linesize);
+ sws_freeContext(img_convert_ctx);
+#endif
+ *data = frame.data;
+ *step = frame.step;
+ *width = frame.width;
+ *height = frame.height;
+ *cn = frame.cn;
+
+ return true;
+}
+
+#if defined(__APPLE__)
+#define AV_NOPTS_VALUE_ ((int64_t)0x8000000000000000LL)
+#else
+#define AV_NOPTS_VALUE_ ((int64_t)AV_NOPTS_VALUE)
+#endif
+
+double CvCapture_FFMPEG::getProperty( int property_id )
+{
+ // if( !capture || !video_st || !picture->data[0] ) return 0;
+ if( !video_st ) return 0;
+
+ double frameScale = av_q2d (video_st->time_base) * av_q2d (video_st->r_frame_rate);
+ int64_t timestamp;
+ timestamp = picture_pts;
+
+ switch( property_id )
+ {
+ case CV_FFMPEG_CAP_PROP_POS_MSEC:
+ if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
+ return (((double)video_st->parser->dts-1) *1000.0f) * av_q2d (video_st->time_base);
+ if(video_st->cur_dts != AV_NOPTS_VALUE_)
+ return ((video_st->cur_dts-video_st->first_dts) * 1000.0 * av_q2d (video_st->time_base));
+ break;
+ case CV_FFMPEG_CAP_PROP_POS_FRAMES:
+ if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
+ return (double)video_st->parser->dts-1;
+ if(video_st->cur_dts != AV_NOPTS_VALUE_)
+ return((video_st->cur_dts-video_st->first_dts) * frameScale);
+ break;
+ case CV_FFMPEG_CAP_PROP_POS_AVI_RATIO:
+ if(video_st->parser && video_st->parser->dts != AV_NOPTS_VALUE_)
+ return (double)(video_st->parser->dts-1)/(double)video_st->duration;
+ if(video_st->cur_dts != AV_NOPTS_VALUE_ && video_st->duration != AV_NOPTS_VALUE_)
+ return(((video_st->cur_dts-video_st->first_dts)+(1.0/frameScale)) / (double)video_st->duration);
+ break;
+ case CV_FFMPEG_CAP_PROP_FRAME_COUNT:
+ if(video_st->duration != AV_NOPTS_VALUE_)
+ return (double)video_st->duration * frameScale;
+ break;
+ case CV_FFMPEG_CAP_PROP_FRAME_WIDTH:
+ return (double)frame.width;
+ break;
+ case CV_FFMPEG_CAP_PROP_FRAME_HEIGHT:
+ return (double)frame.height;
+ break;
+ case CV_FFMPEG_CAP_PROP_FPS:
+#if LIBAVCODEC_BUILD > 4753
+ return av_q2d (video_st->r_frame_rate);
+#else
+ return (double)video_st->codec.frame_rate
+ / (double)video_st->codec.frame_rate_base;
+#endif
+ break;
+ case CV_FFMPEG_CAP_PROP_FOURCC:
+#if LIBAVFORMAT_BUILD > 4628
+ return (double)video_st->codec->codec_tag;
+#else
+ return (double)video_st->codec.codec_tag;
+#endif
+ break;
+ }
+ return 0;
+}
+
+
+
+// this is a VERY slow fallback function, ONLY used if ffmpeg's av_seek_frame delivers no correct result!
+bool CvCapture_FFMPEG::slowSeek( int framenumber )
+{
+ if ( framenumber>picture_pts )
+ {
+ while ( picture_pts<framenumber )
+ if ( !grabFrame() ) return false;
+ }
+ else if ( framenumber<picture_pts )
+ {
+ reopen();
+ while ( picture_pts<framenumber )
+ if ( !grabFrame() ) return false;
+ }
+ return true;
+}
+
+
+bool CvCapture_FFMPEG::setProperty( int property_id, double value )
+{
+ if( !video_st ) return false;
+
+ switch( property_id )
+ {
+ case CV_FFMPEG_CAP_PROP_POS_MSEC:
+ case CV_FFMPEG_CAP_PROP_POS_FRAMES:
+ case CV_FFMPEG_CAP_PROP_POS_AVI_RATIO:
+ {
+ int64_t timestamp = ic->streams[video_stream]->first_dts;
+ AVRational time_base = ic->streams[video_stream]->time_base;
+ AVRational frame_base = ic->streams[video_stream]->r_frame_rate;
+ double timeScale = (time_base.den / (double)time_base.num) / (frame_base.num / frame_base.den);
+ switch( property_id )
+ {
+ case CV_FFMPEG_CAP_PROP_POS_FRAMES:
+ timestamp += (int64_t)(value * timeScale);
+ if(ic->start_time != AV_NOPTS_VALUE_)
+ timestamp += ic->start_time;
+ break;
+
+ case CV_FFMPEG_CAP_PROP_POS_MSEC:
+ timestamp +=(int64_t)(value*(float(time_base.den)/float(time_base.num))/1000);
+ if(ic->start_time != AV_NOPTS_VALUE_)
+ timestamp += ic->start_time;
+ break;
+
+ case CV_FFMPEG_CAP_PROP_POS_AVI_RATIO:
+ timestamp += (int64_t)(value*ic->duration);
+ if(ic->start_time != AV_NOPTS_VALUE_ && ic->duration != AV_NOPTS_VALUE_)
+ timestamp += ic->start_time;
+ break;
+ }
+
+ if ( filename )
+ {
+ // ffmpeg's seek doesn't work...
+ if (!slowSeek((int)timestamp))
+ {
+ fprintf(stderr, "HIGHGUI ERROR: AVI: could not (slow) seek to position %0.3f\n",
+ (double)timestamp / AV_TIME_BASE);
+ return false;
+ }
+ }
+ else
+ {
+ int flags = AVSEEK_FLAG_FRAME;
+ if (timestamp < ic->streams[video_stream]->cur_dts)
+ flags |= AVSEEK_FLAG_BACKWARD;
+ int ret = av_seek_frame(ic, video_stream, timestamp, flags);
+ if (ret < 0)
+ {
+ fprintf(stderr, "HIGHGUI ERROR: AVI: could not seek to position %0.3f\n",
+ (double)timestamp / AV_TIME_BASE);
+ return false;
+ }
+ }
+ picture_pts=(int64_t)value;
+ }
+ break;
+
+ default:
+ return false;
+ }
+
+ return true;
+}
+
+
+///////////////// FFMPEG CvVideoWriter implementation //////////////////////////
+struct CvVideoWriter_FFMPEG
+{
+ bool open( const char* filename, int fourcc,
+ double fps, int width, int height, bool isColor );
+ void close();
+ bool writeFrame( const unsigned char* data, int step, int width, int height, int cn, int origin );
+
+ void init();
+
+ AVOutputFormat *fmt;
+ AVFormatContext *oc;
+ uint8_t * outbuf;
+ uint32_t outbuf_size;
+ FILE * outfile;
+ AVFrame * picture;
+ AVFrame * input_picture;
+ uint8_t * picbuf;
+ AVStream * video_st;
+ int input_pix_fmt;
+ Image_FFMPEG temp_image;
+#if defined(HAVE_FFMPEG_SWSCALE)
+ struct SwsContext *img_convert_ctx;
+#endif
+};
+
+static const char * icvFFMPEGErrStr(int err)
+{
+ switch(err) {
+ case AVERROR_NUMEXPECTED:
+ return "Incorrect filename syntax";
+ case AVERROR_INVALIDDATA:
+ return "Invalid data in header";
+ case AVERROR_NOFMT:
+ return "Unknown format";
+ case AVERROR_IO:
+ return "I/O error occurred";
+ case AVERROR_NOMEM:
+ return "Memory allocation error";
+ default:
+ break;
+ }
+ return "Unspecified error";
+}
+
+/* function internal to FFMPEG (libavformat/riff.c) to lookup codec id by fourcc tag*/
+extern "C" {
+ enum CodecID codec_get_bmp_id(unsigned int tag);
+}
+
+void CvVideoWriter_FFMPEG::init()
+{
+ fmt = 0;
+ oc = 0;
+ outbuf = 0;
+ outbuf_size = 0;
+ outfile = 0;
+ picture = 0;
+ input_picture = 0;
+ picbuf = 0;
+ video_st = 0;
+ input_pix_fmt = 0;
+ memset(&temp_image, 0, sizeof(temp_image));
+#if defined(HAVE_FFMPEG_SWSCALE)
+ img_convert_ctx = 0;
+#endif
+}
+
+/**
+ * the following function is a modified version of code
+ * found in ffmpeg-0.4.9-pre1/output_example.c
+ */
+static AVFrame * icv_alloc_picture_FFMPEG(int pix_fmt, int width, int height, bool alloc)
+{
+ AVFrame * picture;
+ uint8_t * picture_buf;
+ int size;
+
+ picture = avcodec_alloc_frame();
+ if (!picture)
+ return NULL;
+ size = avpicture_get_size( (PixelFormat) pix_fmt, width, height);
+ if(alloc){
+ picture_buf = (uint8_t *) malloc(size);
+ if (!picture_buf)
+ {
+ av_free(picture);
+ return NULL;
+ }
+ avpicture_fill((AVPicture *)picture, picture_buf,
+ (PixelFormat) pix_fmt, width, height);
+ }
+ else {
+ }
+ return picture;
+}
+
+/* add a video output stream to the container */
+static AVStream *icv_add_video_stream_FFMPEG(AVFormatContext *oc,
+ CodecID codec_id,
+ int w, int h, int bitrate,
+ double fps, int pixel_format)
+{
+ AVCodecContext *c;
+ AVStream *st;
+ int frame_rate, frame_rate_base;
+ AVCodec *codec;
+
+
+ st = av_new_stream(oc, 0);
+ if (!st) {
+ CV_WARN("Could not allocate stream");
+ return NULL;
+ }
+
+#if LIBAVFORMAT_BUILD > 4628
+ c = st->codec;
+#else
+ c = &(st->codec);
+#endif
+
+#if LIBAVFORMAT_BUILD > 4621
+ c->codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_VIDEO);
+#else
+ c->codec_id = oc->oformat->video_codec;
+#endif
+
+ if(codec_id != CODEC_ID_NONE){
+ c->codec_id = codec_id;
+ }
+
+ //if(codec_tag) c->codec_tag=codec_tag;
+ codec = avcodec_find_encoder(c->codec_id);
+
+ c->codec_type = CODEC_TYPE_VIDEO;
+
+ /* put sample parameters */
+ c->bit_rate = bitrate;
+
+ /* resolution must be a multiple of two */
+ c->width = w;
+ c->height = h;
+
+ /* time base: this is the fundamental unit of time (in seconds) in terms
+ of which frame timestamps are represented. for fixed-fps content,
+ timebase should be 1/framerate and timestamp increments should be
+ identically 1. */
+ frame_rate=(int)(fps+0.5);
+ frame_rate_base=1;
+ while (fabs((double)frame_rate/frame_rate_base) - fps > 0.001){
+ frame_rate_base*=10;
+ frame_rate=(int)(fps*frame_rate_base + 0.5);
+ }
+#if LIBAVFORMAT_BUILD > 4752
+ c->time_base.den = frame_rate;
+ c->time_base.num = frame_rate_base;
+ /* adjust time base for supported framerates */
+ if(codec && codec->supported_framerates){
+ const AVRational *p= codec->supported_framerates;
+ AVRational req = {frame_rate, frame_rate_base};
+ const AVRational *best=NULL;
+ AVRational best_error= {INT_MAX, 1};
+ for(; p->den!=0; p++){
+ AVRational error= av_sub_q(req, *p);
+ if(error.num <0) error.num *= -1;
+ if(av_cmp_q(error, best_error) < 0){
+ best_error= error;
+ best= p;
+ }
+ }
+ c->time_base.den= best->num;
+ c->time_base.num= best->den;
+ }
+#else
+ c->frame_rate = frame_rate;
+ c->frame_rate_base = frame_rate_base;
+#endif
+
+ c->gop_size = 12; /* emit one intra frame every twelve frames at most */
+ c->pix_fmt = (PixelFormat) pixel_format;
+
+ if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
+ c->max_b_frames = 2;
+ }
+ if (c->codec_id == CODEC_ID_MPEG1VIDEO || c->codec_id == CODEC_ID_MSMPEG4V3){
+ /* needed to avoid using macroblocks in which some coeffs overflow
+ this doesnt happen with normal video, it just happens here as the
+ motion of the chroma plane doesnt match the luma plane */
+ /* avoid FFMPEG warning 'clipping 1 dct coefficients...' */
+ c->mb_decision=2;
+ }
+#if LIBAVCODEC_VERSION_INT>0x000409
+ // some formats want stream headers to be seperate
+ if(oc->oformat->flags & AVFMT_GLOBALHEADER)
+ {
+ c->flags |= CODEC_FLAG_GLOBAL_HEADER;
+ }
+#endif
+
+ return st;
+}
+
+int icv_av_write_frame_FFMPEG( AVFormatContext * oc, AVStream * video_st, uint8_t * outbuf, uint32_t outbuf_size, AVFrame * picture )
+{
+
+#if LIBAVFORMAT_BUILD > 4628
+ AVCodecContext * c = video_st->codec;
+#else
+ AVCodecContext * c = &(video_st->codec);
+#endif
+ int out_size;
+ int ret;
+
+ if (oc->oformat->flags & AVFMT_RAWPICTURE) {
+ /* raw video case. The API will change slightly in the near
+ futur for that */
+ AVPacket pkt;
+ av_init_packet(&pkt);
+
+ pkt.flags |= PKT_FLAG_KEY;
+ pkt.stream_index= video_st->index;
+ pkt.data= (uint8_t *)picture;
+ pkt.size= sizeof(AVPicture);
+
+ ret = av_write_frame(oc, &pkt);
+ } else {
+ /* encode the image */
+ out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
+ /* if zero size, it means the image was buffered */
+ if (out_size > 0) {
+ AVPacket pkt;
+ av_init_packet(&pkt);
+
+#if LIBAVFORMAT_BUILD > 4752
+ pkt.pts = av_rescale_q(c->coded_frame->pts, c->time_base, video_st->time_base);
+#else
+ pkt.pts = c->coded_frame->pts;
+#endif
+ if(c->coded_frame->key_frame)
+ pkt.flags |= PKT_FLAG_KEY;
+ pkt.stream_index= video_st->index;
+ pkt.data= outbuf;
+ pkt.size= out_size;
+
+ /* write the compressed frame in the media file */
+ ret = av_write_frame(oc, &pkt);
+ } else {
+ ret = 0;
+ }
+ }
+ if (ret != 0) return -1;
+
+ return 0;
+}
+
+/// write a frame with FFMPEG
+bool CvVideoWriter_FFMPEG::writeFrame( const unsigned char* data, int step, int width, int height, int cn, int origin )
+{
+ bool ret = false;
+
+ // typecast from opaque data type to implemented struct
+#if LIBAVFORMAT_BUILD > 4628
+ AVCodecContext *c = video_st->codec;
+#else
+ AVCodecContext *c = &(video_st->codec);
+#endif
+
+#if LIBAVFORMAT_BUILD < 5231
+ // It is not needed in the latest versions of the ffmpeg
+ if( c->codec_id == CODEC_ID_RAWVIDEO && origin != 1 )
+ {
+ if( !temp_image.data )
+ {
+ temp_image.step = (width*cn + 3) & -4;
+ temp_image.width = width;
+ temp_image.height = height;
+ temp_image.cn = cn;
+ temp_image.data = malloc(temp_image.step*temp_image.height);
+ }
+ for( int y = 0; y < height; y++ )
+ memcpy(temp_image.data + y*temp_image.step, data + (height-1-y)*step, width*cn);
+ data = temp_image.data;
+ step = temp_image.step;
+ }
+#endif
+
+ // check parameters
+ if (input_pix_fmt == PIX_FMT_BGR24) {
+ if (cn != 3) {
+ return false;
+ }
+ }
+ else if (input_pix_fmt == PIX_FMT_GRAY8) {
+ if (cn != 1) {
+ return false;
+ }
+ }
+ else {
+ assert(false);
+ }
+
+ // check if buffer sizes match, i.e. image has expected format (size, channels, bitdepth, alignment)
+/*#if LIBAVCODEC_VERSION_INT >= ((52<<16)+(37<<8)+0)
+ assert (image->imageSize == avpicture_get_size( (PixelFormat)input_pix_fmt, image->width, image->height ));
+#else
+ assert (image->imageSize == avpicture_get_size( input_pix_fmt, image->width, image->height ));
+#endif*/
+
+ if ( c->pix_fmt != input_pix_fmt ) {
+ assert( input_picture );
+ // let input_picture point to the raw data buffer of 'image'
+ avpicture_fill((AVPicture *)input_picture, (uint8_t *) data,
+ (PixelFormat)input_pix_fmt, width, height);
+
+#if !defined(HAVE_FFMPEG_SWSCALE)
+ // convert to the color format needed by the codec
+ if( img_convert((AVPicture *)picture, c->pix_fmt,
+ (AVPicture *)input_picture, (PixelFormat)input_pix_fmt,
+ width, height) < 0){
+ return false;
+ }
+#else
+ img_convert_ctx = sws_getContext(width,
+ height,
+ PIX_FMT_BGR24,
+ c->width,
+ c->height,
+ c->pix_fmt,
+ SWS_BICUBIC,
+ NULL, NULL, NULL);
+
+ if ( sws_scale(img_convert_ctx, input_picture->data,
+ input_picture->linesize, 0,
+ height,
+ picture->data, picture->linesize) < 0 )
+ {
+ return false;
+ }
+ sws_freeContext(img_convert_ctx);
+#endif
+ }
+ else{
+ avpicture_fill((AVPicture *)picture, (uint8_t *) data,
+ (PixelFormat)input_pix_fmt, width, height);
+ }
+
+ ret = icv_av_write_frame_FFMPEG( oc, video_st, outbuf, outbuf_size, picture) >= 0;
+
+ return ret;
+}
+
+/// close video output stream and free associated memory
+void CvVideoWriter_FFMPEG::close()
+{
+ unsigned i;
+
+ // nothing to do if already released
+ if ( !picture )
+ return;
+
+ /* no more frame to compress. The codec has a latency of a few
+ frames if using B frames, so we get the last frames by
+ passing the same picture again */
+ // TODO -- do we need to account for latency here?
+
+ /* write the trailer, if any */
+ av_write_trailer(oc);
+
+ // free pictures
+#if LIBAVFORMAT_BUILD > 4628
+ if( video_st->codec->pix_fmt != input_pix_fmt){
+#else
+ if( video_st->codec.pix_fmt != input_pix_fmt){
+#endif
+ if(picture->data[0])
+ free(picture->data[0]);
+ picture->data[0] = 0;
+ }
+ av_free(picture);
+
+ if (input_picture) {
+ av_free(input_picture);
+ }
+
+ /* close codec */
+#if LIBAVFORMAT_BUILD > 4628
+ avcodec_close(video_st->codec);
+#else
+ avcodec_close(&(video_st->codec));
+#endif
+
+ av_free(outbuf);
+
+ /* free the streams */
+ for(i = 0; i < oc->nb_streams; i++) {
+ av_freep(&oc->streams[i]->codec);
+ av_freep(&oc->streams[i]);
+ }
+
+ if (!(fmt->flags & AVFMT_NOFILE)) {
+ /* close the output file */
+
+
+#if LIBAVCODEC_VERSION_INT >= ((51<<16)+(49<<8)+0)
+ url_fclose(oc->pb);
+#else
+ url_fclose(&oc->pb);
+#endif
+
+ }
+
+ /* free the stream */
+ av_free(oc);
+
+ if( temp_image.data )
+ {
+ free(temp_image.data);
+ temp_image.data = 0;
+ }
+
+ init();
+}
+
+/// Create a video writer object that uses FFMPEG
+bool CvVideoWriter_FFMPEG::open( const char * filename, int fourcc,
+ double fps, int width, int height, bool is_color )
+{
+ CodecID codec_id = CODEC_ID_NONE;
+ int err, codec_pix_fmt, bitrate_scale=64;
+
+ close();
+
+ // check arguments
+ assert (filename);
+ assert (fps > 0);
+ assert (width > 0 && height > 0);
+
+ // tell FFMPEG to register codecs
+ av_register_all ();
+
+ /* auto detect the output format from the name and fourcc code. */
+ fmt = guess_format(NULL, filename, NULL);
+ if (!fmt)
+ return false;
+
+ /* determine optimal pixel format */
+ if (is_color) {
+ input_pix_fmt = PIX_FMT_BGR24;
+ }
+ else {
+ input_pix_fmt = PIX_FMT_GRAY8;
+ }
+
+ /* Lookup codec_id for given fourcc */
+#if LIBAVCODEC_VERSION_INT<((51<<16)+(49<<8)+0)
+ if( (codec_id = codec_get_bmp_id( fourcc )) == CODEC_ID_NONE )
+ return false;
+#else
+ const struct AVCodecTag * tags[] = { codec_bmp_tags, NULL};
+ if( (codec_id = av_codec_get_id(tags, fourcc)) == CODEC_ID_NONE )
+ return false;
+#endif
+
+ // alloc memory for context
+ oc = av_alloc_format_context();
+ assert (oc);
+
+ /* set file name */
+ oc->oformat = fmt;
+ snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
+
+ /* set some options */
+ oc->max_delay = (int)(0.7*AV_TIME_BASE); /* This reduces buffer underrun warnings with MPEG */
+
+ // set a few optimal pixel formats for lossless codecs of interest..
+ switch (codec_id) {
+#if LIBAVCODEC_VERSION_INT>((50<<16)+(1<<8)+0)
+ case CODEC_ID_JPEGLS:
+ // BGR24 or GRAY8 depending on is_color...
+ codec_pix_fmt = input_pix_fmt;
+ break;
+#endif
+ case CODEC_ID_HUFFYUV:
+ codec_pix_fmt = PIX_FMT_YUV422P;
+ break;
+ case CODEC_ID_MJPEG:
+ case CODEC_ID_LJPEG:
+ codec_pix_fmt = PIX_FMT_YUVJ420P;
+ bitrate_scale = 128;
+ break;
+ case CODEC_ID_RAWVIDEO:
+ codec_pix_fmt = input_pix_fmt;
+ break;
+ default:
+ // good for lossy formats, MPEG, etc.
+ codec_pix_fmt = PIX_FMT_YUV420P;
+ break;
+ }
+
+ // TODO -- safe to ignore output audio stream?
+ video_st = icv_add_video_stream_FFMPEG(oc, codec_id,
+ width, height, width*height*bitrate_scale,
+ fps, codec_pix_fmt);
+
+
+ /* set the output parameters (must be done even if no
+ parameters). */
+ if (av_set_parameters(oc, NULL) < 0) {
+ return false;
+ }
+
+ dump_format(oc, 0, filename, 1);
+
+ /* now that all the parameters are set, we can open the audio and
+ video codecs and allocate the necessary encode buffers */
+ if (!video_st){
+ return false;
+ }
+
+ AVCodec *codec;
+ AVCodecContext *c;
+
+#if LIBAVFORMAT_BUILD > 4628
+ c = (video_st->codec);
+#else
+ c = &(video_st->codec);
+#endif
+
+ c->codec_tag = fourcc;
+ /* find the video encoder */
+ codec = avcodec_find_encoder(c->codec_id);
+ if (!codec) {
+ return false;
+ }
+
+ c->bit_rate_tolerance = c->bit_rate;
+
+ /* open the codec */
+ if ( (err=avcodec_open(c, codec)) < 0) {
+ char errtext[256];
+ sprintf(errtext, "Could not open codec '%s': %s", codec->name, icvFFMPEGErrStr(err));
+ return false;
+ }
+
+ outbuf = NULL;
+
+ if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
+ /* allocate output buffer */
+ /* assume we will never get codec output with more than 4 bytes per pixel... */
+ outbuf_size = width*height*4;
+ outbuf = (uint8_t *) av_malloc(outbuf_size);
+ }
+
+ bool need_color_convert;
+ need_color_convert = (c->pix_fmt != input_pix_fmt);
+
+ /* allocate the encoded raw picture */
+ picture = icv_alloc_picture_FFMPEG(c->pix_fmt, c->width, c->height, need_color_convert);
+ if (!picture) {
+ return false;
+ }
+
+ /* if the output format is not our input format, then a temporary
+ picture of the input format is needed too. It is then converted
+ to the required output format */
+ input_picture = NULL;
+ if ( need_color_convert ) {
+ input_picture = icv_alloc_picture_FFMPEG(input_pix_fmt, c->width, c->height, false);
+ if (!input_picture) {
+ return false;
+ }
+ }
+
+ /* open the output file, if needed */
+ if (!(fmt->flags & AVFMT_NOFILE)) {
+ if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
+ return false;
+ }
+ }
+
+ /* write the stream header, if any */
+ av_write_header( oc );
+
+ return true;
+}
+
+
+
+CvCapture_FFMPEG* cvCreateFileCapture_FFMPEG( const char* filename )
+{
+ CvCapture_FFMPEG* capture = (CvCapture_FFMPEG*)malloc(sizeof(*capture));
+ capture->init();
+ if( capture->open( filename ))
+ return capture;
+ capture->close();
+ free(capture);
+ return 0;
+}
+
+
+void cvReleaseCapture_FFMPEG(CvCapture_FFMPEG** capture)
+{
+ if( capture && *capture )
+ {
+ (*capture)->close();
+ free(*capture);
+ *capture = 0;
+ }
+}
+
+int cvSetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id, double value)
+{
+ return capture->setProperty(prop_id, value);
+}
+
+double cvGetCaptureProperty_FFMPEG(CvCapture_FFMPEG* capture, int prop_id)
+{
+ return capture->getProperty(prop_id);
+}
+
+int cvGrabFrame_FFMPEG(CvCapture_FFMPEG* capture)
+{
+ return capture->grabFrame();
+}
+
+int cvRetrieveFrame_FFMPEG(CvCapture_FFMPEG* capture, unsigned char** data, int* step, int* width, int* height, int* cn)
+{
+ return capture->retrieveFrame(0, data, step, width, height, cn);
+}
+
+
+
+CvVideoWriter_FFMPEG* cvCreateVideoWriter_FFMPEG( const char* filename, int fourcc, double fps,
+ int width, int height, int isColor )
+{
+ CvVideoWriter_FFMPEG* writer = (CvVideoWriter_FFMPEG*)malloc(sizeof(*writer));
+ writer->init();
+ if( writer->open( filename, fourcc, fps, width, height, isColor != 0 ))
+ return writer;
+ writer->close();
+ free(writer);
+ return 0;
+}
+
+
+void cvReleaseVideoWriter_FFMPEG( CvVideoWriter_FFMPEG** writer )
+{
+ if( writer && *writer )
+ {
+ (*writer)->close();
+ free(*writer);
+ *writer = 0;
+ }
+}
+
+
+int cvWriteFrame_FFMPEG( CvVideoWriter_FFMPEG* writer,
+ const unsigned char* data, int step,
+ int width, int height, int cn, int origin)
+{
+ return writer->writeFrame(data, step, width, height, cn, origin);
+}
+
+++ /dev/null
-/*M///////////////////////////////////////////////////////////////////////////////////////
-//
-// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
-//
-// By downloading, copying, installing or using the software you agree to this license.
-// If you do not agree to this license, do not download, install,
-// copy or use the software.
-//
-//
-// Intel License Agreement
-// For Open Source Computer Vision Library
-//
-// Copyright (C) 2000, Intel Corporation, all rights reserved.
-// Third party copyrights are property of their respective owners.
-//
-// Redistribution and use in source and binary forms, with or without modification,
-// are permitted provided that the following conditions are met:
-//
-// * Redistribution's of source code must retain the above copyright notice,
-// this list of conditions and the following disclaimer.
-//
-// * Redistribution's in binary form must reproduce the above copyright notice,
-// this list of conditions and the following disclaimer in the documentation
-// and/or other materials provided with the distribution.
-//
-// * The name of Intel Corporation may not be used to endorse or promote products
-// derived from this software without specific prior written permission.
-//
-// This software is provided by the copyright holders and contributors "as is" and
-// any express or implied warranties, including, but not limited to, the implied
-// warranties of merchantability and fitness for a particular purpose are disclaimed.
-// In no event shall the Intel Corporation or contributors be liable for any direct,
-// indirect, incidental, special, exemplary, or consequential damages
-// (including, but not limited to, procurement of substitute goods or services;
-// loss of use, data, or profits; or business interruption) however caused
-// and on any theory of liability, whether in contract, strict liability,
-// or tort (including negligence or otherwise) arising in any way out of
-// the use of this software, even if advised of the possibility of such damage.
-//
-//M*/
-
-#include "precomp.hpp"
-
-extern "C"
-{
-typedef void* (*CvCreateFileCapture_Plugin)( const char* filename );
-typedef void* (*CvCreateCameraCapture_Plugin)( int index );
-typedef int (*CvGrabFrame_Plugin)( void* capture_handle );
-typedef IplImage* (*CvRetrieveFrame_Plugin)( void* capture_handle, int );
-typedef int (*CvSetCaptureProperty_Plugin)( void* capture_handle, int prop_id, double value );
-typedef double (*CvGetCaptureProperty_Plugin)( void* capture_handle, int prop_id );
-typedef void (*CvReleaseCapture_Plugin)( void** capture_handle );
-typedef void* (*CvCreateVideoWriter_Plugin)( const char* filename, int fourcc,
- double fps, CvSize frameSize, int isColor );
-typedef int (*CvWriteFrame_Plugin)( void* writer_handle, const IplImage* frame );
-typedef void (*CvReleaseVideoWriter_Plugin)( void** writer );
-}
-
-static HMODULE icvFFOpenCV = 0;
-static CvCreateFileCapture_Plugin icvCreateFileCapture_FFMPEG_p = 0;
-static CvReleaseCapture_Plugin icvReleaseCapture_FFMPEG_p = 0;
-static CvGrabFrame_Plugin icvGrabFrame_FFMPEG_p = 0;
-static CvRetrieveFrame_Plugin icvRetrieveFrame_FFMPEG_p = 0;
-static CvSetCaptureProperty_Plugin icvSetCaptureProperty_FFMPEG_p = 0;
-static CvGetCaptureProperty_Plugin icvGetCaptureProperty_FFMPEG_p = 0;
-static CvCreateVideoWriter_Plugin icvCreateVideoWriter_FFMPEG_p = 0;
-static CvReleaseVideoWriter_Plugin icvReleaseVideoWriter_FFMPEG_p = 0;
-static CvWriteFrame_Plugin icvWriteFrame_FFMPEG_p = 0;
-
-static void
-icvInitFFMPEG(void)
-{
- static int ffmpegInitialized = 0;
- if( !ffmpegInitialized )
- {
-#ifdef __MINGW32__
-#define ffopencv_prefix "lib"
-#else
-#define ffopencv_prefix ""
-#endif
-#if defined(_DEBUG)
-#define ffopencv_suffix_dbg "d"
-#else
-#define ffopencv_suffix_dbg ""
-#endif
-#if defined EM64T
-#define ffopencv_suffix "_64"
-#else
-#define ffopencv_suffix ""
-#endif
-
-#define ffopencv_name_m2(a,b,c) ffopencv_prefix "opencv_ffmpeg" #a #b #c ffopencv_suffix ffopencv_suffix_dbg ".dll"
-#define ffopencv_name_m(a,b,c) ffopencv_name_m2(a,b,c)
- const char* ffopencv_name =
- ffopencv_name_m(CV_MAJOR_VERSION,CV_MINOR_VERSION,CV_SUBMINOR_VERSION);
-
- icvFFOpenCV = LoadLibrary( ffopencv_name );
- if( icvFFOpenCV )
- {
- icvCreateFileCapture_FFMPEG_p =
- (CvCreateFileCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateFileCapture_FFMPEG");
- icvReleaseCapture_FFMPEG_p =
- (CvReleaseCapture_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseCapture_FFMPEG");
- icvGrabFrame_FFMPEG_p =
- (CvGrabFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvGrabFrame_FFMPEG");
- icvRetrieveFrame_FFMPEG_p =
- (CvRetrieveFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvRetrieveFrame_FFMPEG");
- icvSetCaptureProperty_FFMPEG_p =
- (CvSetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvSetCaptureProperty_FFMPEG");
- icvGetCaptureProperty_FFMPEG_p =
- (CvGetCaptureProperty_Plugin)GetProcAddress(icvFFOpenCV, "cvGetCaptureProperty_FFMPEG");
- icvCreateVideoWriter_FFMPEG_p =
- (CvCreateVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvCreateVideoWriter_FFMPEG");
- icvReleaseVideoWriter_FFMPEG_p =
- (CvReleaseVideoWriter_Plugin)GetProcAddress(icvFFOpenCV, "cvReleaseVideoWriter_FFMPEG");
- icvWriteFrame_FFMPEG_p =
- (CvWriteFrame_Plugin)GetProcAddress(icvFFOpenCV, "cvWriteFrame_FFMPEG");
- }
- ffmpegInitialized = 1;
- }
-}
-
-
-class CvCapture_FFMPEG_proxy : public CvCapture
-{
-public:
- CvCapture_FFMPEG_proxy() { ffmpegCapture = 0; }
- virtual ~CvCapture_FFMPEG_proxy() { close(); }
-
- virtual double getProperty(int propId)
- {
- return ffmpegCapture ? icvGetCaptureProperty_FFMPEG_p(ffmpegCapture, propId) : 0;
- }
- virtual bool setProperty(int propId, double value)
- {
- return ffmpegCapture ? icvSetCaptureProperty_FFMPEG_p(ffmpegCapture, propId, value)!=0 : false;
- }
- virtual bool grabFrame()
- {
- return ffmpegCapture ? icvGrabFrame_FFMPEG_p(ffmpegCapture)!=0 : false;
- }
- virtual IplImage* retrieveFrame(int)
- {
- return ffmpegCapture ? icvRetrieveFrame_FFMPEG_p(ffmpegCapture,0) : 0;
- }
- virtual bool open( const char* filename )
- {
- close();
-
- icvInitFFMPEG();
- if( !icvCreateFileCapture_FFMPEG_p )
- return false;
- ffmpegCapture = icvCreateFileCapture_FFMPEG_p( filename );
- return ffmpegCapture != 0;
- }
- virtual void close()
- {
- if( ffmpegCapture && icvReleaseCapture_FFMPEG_p )
- icvReleaseCapture_FFMPEG_p( &ffmpegCapture );
- assert( ffmpegCapture == 0 );
- ffmpegCapture = 0;
- }
-
-protected:
- void* ffmpegCapture;
-};
-
-
-CvCapture* cvCreateFileCapture_Win32(const char * filename)
-{
- CvCapture_FFMPEG_proxy* result = new CvCapture_FFMPEG_proxy;
- if( result->open( filename ))
- return result;
- delete result;
- return cvCreateFileCapture_VFW(filename);
-}
-
-
-class CvVideoWriter_FFMPEG_proxy : public CvVideoWriter
-{
-public:
- CvVideoWriter_FFMPEG_proxy() { ffmpegWriter = 0; }
- virtual ~CvVideoWriter_FFMPEG_proxy() { close(); }
-
- virtual bool writeFrame( const IplImage* image )
- {
- return ffmpegWriter ? icvWriteFrame_FFMPEG_p(ffmpegWriter, image)!=0 : false;
- }
- virtual bool open( const char* filename, int fourcc, double fps, CvSize frameSize, bool isColor )
- {
- close();
- icvInitFFMPEG();
- if( !icvCreateVideoWriter_FFMPEG_p )
- return false;
- ffmpegWriter = icvCreateVideoWriter_FFMPEG_p( filename, fourcc, fps, frameSize, isColor );
- return ffmpegWriter != 0;
- }
-
- virtual void close()
- {
- if( ffmpegWriter && icvReleaseVideoWriter_FFMPEG_p )
- icvReleaseVideoWriter_FFMPEG_p( &ffmpegWriter );
- assert( ffmpegWriter == 0 );
- ffmpegWriter = 0;
- }
-
-protected:
- void* ffmpegWriter;
-};
-
-
-CvVideoWriter* cvCreateVideoWriter_Win32( const char* filename, int fourcc,
- double fps, CvSize frameSize, int isColor )
-{
- CvVideoWriter_FFMPEG_proxy* result = new CvVideoWriter_FFMPEG_proxy;
-
- if( result->open( filename, fourcc, fps, frameSize, isColor != 0 ))
- return result;
- delete result;
-
- return cvCreateVideoWriter_VFW(filename, fourcc, fps, frameSize, isColor);
-}
#define CV_CAP_GSTREAMER_V4L2 2
#define CV_CAP_GSTREAMER_FILE 3
-CvCapture * cvCreateCapture_GStreamer(int type, const char *filename);
-CVAPI(CvCapture*) cvCreateFileCapture_FFMPEG (const char* filename);
+CvCapture* cvCreateCapture_GStreamer(int type, const char *filename);
+CvCapture* cvCreateFileCapture_FFMPEG_proxy(const char* filename);
-CVAPI(CvVideoWriter*) cvCreateVideoWriter_FFMPEG ( const char* filename, int fourcc,
+CvVideoWriter* cvCreateVideoWriter_FFMPEG_proxy( const char* filename, int fourcc,
double fps, CvSize frameSize, int is_color );
CvCapture * cvCreateFileCapture_QT (const char * filename);
:param edges: Output edge map. It has the same size and type as ``image`` .
- :param threshold1: The first threshold for the hysteresis procedure.
+ :param threshold1: First threshold for the hysteresis procedure.
- :param threshold2: The second threshold for the hysteresis procedure.
+ :param threshold2: Second threshold for the hysteresis procedure.
:param apertureSize: Aperture size for the :ocv:func:`Sobel` operator.
where the derivatives are computed using the
:ocv:func:`Sobel` operator.
-After that it finds eigenvectors and eigenvalues of
+After that, it finds eigenvectors and eigenvalues of
:math:`M` and stores them in the destination image as
:math:`(\lambda_1, \lambda_2, x_1, y_1, x_2, y_2)` where
:ocv:func:`cornerMinEigenVal` and
:ocv:func:`cornerEigenValsAndVecs` , for each pixel
:math:`(x, y)` it calculates a
-:math:`2\times2` gradient covariation matrix
+:math:`2\times2` gradient covariance matrix
:math:`M^{(x,y)}` over a
:math:`\texttt{blockSize} \times \texttt{blockSize}` neighborhood. Then, it computes the following characteristic:
:param boderType: Pixel extrapolation method. See :ocv:func:`borderInterpolate` .
The function is similar to
-:ocv:func:`cornerEigenValsAndVecs` but it calculates and stores only the minimal eigenvalue of the covariation matrix of derivatives, that is,
+:ocv:func:`cornerEigenValsAndVecs` but it calculates and stores only the minimal eigenvalue of the covariance matrix of derivatives, that is,
:math:`\min(\lambda_1, \lambda_2)` in terms of the formulae in the
:ocv:func:`cornerEigenValsAndVecs` description.
:param criteria: Criteria for termination of the iterative process of corner refinement. That is, the process of corner position refinement stops either after ``criteria.maxCount`` iterations or when the corner position moves by less than ``criteria.epsilon`` on some iteration.
-The function iterates to find the sub-pixel accurate location of corners or radial saddle points, as shown on the picture below.
+The function iterates to find the sub-pixel accurate location of corners or radial saddle points, as shown on the figure below.
.. image:: pics/cornersubpix.png
The remaining corners are sorted by the quality measure in the descending order.
#.
- Then the function throws away each corner for which there is a stronger corner at a distance less than ``maxDistance``.
+ Function throws away each corner for which there is a stronger corner at a distance less than ``maxDistance``.
The function can be used to initialize a point-based tracker of an object.
-**Note**: If the function is called with different values ``A`` and ``B`` of the parameter ``qualityLevel`` , and ``A`` > {B}, the vector of returned corners with ``qualityLevel=A`` will be the prefix of the output vector with ``qualityLevel=B`` .
+.. note:: If the function is called with different values ``A`` and ``B`` of the parameter ``qualityLevel`` , and ``A`` > {B}, the vector of returned corners with ``qualityLevel=A`` will be the prefix of the output vector with ``qualityLevel=B`` .
.. seealso::
:param circles: Output vector of found circles. Each vector is encoded as a 3-element floating-point vector :math:`(x, y, radius)` .
- :param method: The detection method to use. Currently, the only implemented method is ``CV_HOUGH_GRADIENT`` , which is basically *21HT* , described in [Yuen90]_.
+ :param method: Detection method to use. Currently, the only implemented method is ``CV_HOUGH_GRADIENT`` , which is basically *21HT* , described in [Yuen90]_.
:param dp: Inverse ratio of the accumulator resolution to the image resolution. For example, if ``dp=1`` , the accumulator has the same resolution as the input image. If ``dp=2`` , the accumulator has half as big width and height.
:param minDist: Minimum distance between the centers of the detected circles. If the parameter is too small, multiple neighbor circles may be falsely detected in addition to a true one. If it is too large, some circles may be missed.
- :param param1: The first method-specific parameter. In case of ``CV_HOUGH_GRADIENT`` , it is the higher threshold of the two passed to the :ocv:func:`Canny` edge detector (the lower one is twice smaller).
+ :param param1: First method-specific parameter. In case of ``CV_HOUGH_GRADIENT`` , it is the higher threshold of the two passed to the :ocv:func:`Canny` edge detector (the lower one is twice smaller).
- :param param2: The second method-specific parameter. In case of ``CV_HOUGH_GRADIENT`` , it is the accumulator threshold for the circle centers at the detection stage. The smaller it is, the more false circles may be detected. Circles, corresponding to the larger accumulator values, will be returned first
+ :param param2: Second method-specific parameter. In case of ``CV_HOUGH_GRADIENT`` , it is the accumulator threshold for the circle centers at the detection stage. The smaller it is, the more false circles may be detected. Circles, corresponding to the larger accumulator values, will be returned first.
:param minRadius: Minimum circle radius.
:param maxRadius: Maximum circle radius.
-The function finds circles in a grayscale image using a modification of the Hough transform. Here is a short usage example: ::
+The function finds circles in a grayscale image using a modification of the Hough transform.
+
+Example: ::
#include <cv.h>
#include <highgui.h>
return 0;
}
-**Note**: Usually the function detects the centers of circles well. However, it may fail to find correct radii. You can assist to the function by specifying the radius range ( ``minRadius`` and ``maxRadius`` ) if you know it. Or, you may ignore the returned radius, use only the center, and find the correct radius using an additional procedure.
+.. note:: Usually the function detects the centers of circles well. However, it may fail to find correct radii. You can assist to the function by specifying the radius range ( ``minRadius`` and ``maxRadius`` ) if you know it. Or, you may ignore the returned radius, use only the center, and find the correct radius using an additional procedure.
.. seealso::
:param stn: For the multi-scale Hough transform, it is a divisor for the distance resolution ``theta``.
- :param method: The Hough transform variant, one of the following:
+ :param method: One of the following Hough transform variants:
* **CV_HOUGH_STANDARD** classical or standard Hough transform. Every line is represented by two floating-point numbers :math:`(\rho, \theta)` , where :math:`\rho` is a distance between (0,0) point and the line, and :math:`\theta` is the angle between x-axis and the normal to the line. Thus, the matrix must be (the created sequence will be) of ``CV_32FC2`` type
- * **CV_HOUGH_PROBABILISTIC** probabilistic Hough transform (more efficient in case if picture contains a few long linear segments). It returns line segments rather than the whole line. Each segment is represented by starting and ending points, and the matrix must be (the created sequence will be) of ``CV_32SC4`` type
+ * **CV_HOUGH_PROBABILISTIC** probabilistic Hough transform (more efficient in case if the picture contains a few long linear segments). It returns line segments rather than the whole line. Each segment is represented by starting and ending points, and the matrix must be (the created sequence will be) of the ``CV_32SC4`` type.
- * **CV_HOUGH_MULTI_SCALE** multi-scale variant of the classical Hough transform. The lines are encoded the same way as ``CV_HOUGH_STANDARD``
+ * **CV_HOUGH_MULTI_SCALE** multi-scale variant of the classical Hough transform. The lines are encoded the same way as ``CV_HOUGH_STANDARD``.
- :param param1: The first method-dependent parameter:
+ :param param1: First method-dependent parameter:
- * For the classical Hough transform it is not used (0).
+ * For the classical Hough transform, it is not used (0).
- * For the probabilistic Hough transform it is the minimum line length.
+ * For the probabilistic Hough transform, it is the minimum line length.
- * For the multi-scale Hough transform it is ``srn``.
+ * For the multi-scale Hough transform, it is ``srn``.
- :param param2: The second method-dependent parameter:
+ :param param2: Second method-dependent parameter:
- * For the classical Hough transform it is not used (0).
+ * For the classical Hough transform, it is not used (0).
- * For the probabilistic Hough transform it is the maximum gap between line segments lying on the same line to treat them as a single line segment (that is, to join them).
+ * For the probabilistic Hough transform, it is the maximum gap between line segments lying on the same line to treat them as a single line segment (that is, to join them).
- * For the multi-scale Hough transform it is ``stn``.
+ * For the multi-scale Hough transform, it is ``stn``.
The function implements the standard or standard multi-scale Hough transform algorithm for line detection. See http://homepages.inf.ed.ac.uk/rbf/HIPR2/hough.htm for a good explanation of Hough transform.
See also the example in :ocv:func:`HoughLinesP` description.
The function implements the probabilistic Hough transform algorithm for line detection, described in
[Matas00]_. See the line detection example below: ::
- /* This is a standalone program. Pass an image name as a first parameter
+ /* This is a standalone program. Pass an image name as the first parameter
of the program. Switch between standard and probabilistic Hough transform
by changing "#if 1" to "#if 0" and back */
#include <cv.h>
dilate(corners, dilated_corners, Mat(), 1);
Mat corner_mask = corners == dilated_corners;
-.. [Canny86] J. Canny. A Computational Approach to Edge Detection, IEEE Trans. on Pattern Analysis and Machine Intelligence, 8(6), pp. 679-698 (1986).
+.. [Canny86] J. Canny. *A Computational Approach to Edge Detection*, IEEE Trans. on Pattern Analysis and Machine Intelligence, 8(6), pp. 679-698 (1986).
-.. [Matas00] Matas, J. and Galambos, C. and Kittler, J.V., “Robust Detection of Lines Using the Progressive Probabilistic Hough Transform”. CVIU 78 1, pp 119-137 (2000)
+.. [Matas00] Matas, J. and Galambos, C. and Kittler, J.V., *Robust Detection of Lines Using the Progressive Probabilistic Hough Transform*. CVIU 78 1, pp 119-137 (2000)
-.. [Shi94] J. Shi and C. Tomasi. Good features to track. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pages 593-600, June 1994.
+.. [Shi94] J. Shi and C. Tomasi. *Good Features to Track*. Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, pages 593-600, June 1994.
-.. [Yuen90] Yuen, H. K. and Princen, J. and Illingworth, J. and Kittler, J., “Comparative study of Hough transform methods for circle finding”. Image Vision Comput. 8 1, pp 71–77 (1990)
\ No newline at end of file
+.. [Yuen90] Yuen, H. K. and Princen, J. and Illingworth, J. and Kittler, J., *Comparative study of Hough transform methods for circle finding*. Image Vision Comput. 8 1, pp 71–77 (1990)
\ No newline at end of file
:param narrays: Number of source arrays.
- :param channels: List of the ``dims`` channels used to compute the histogram. The first array channels are numerated from 0 to ``arrays[0].channels()-1`` , the second array channels are counted from ``arrays[0].channels()`` to ``arrays[0].channels() + arrays[1].channels()-1`` etc.
+ :param channels: List of the ``dims`` channels used to compute the histogram. The first array channels are numerated from 0 to ``arrays[0].channels()-1`` , the second array channels are counted from ``arrays[0].channels()`` to ``arrays[0].channels() + arrays[1].channels()-1``, and so on.
:param mask: Optional mask. If the matrix is not empty, it must be an 8-bit array of the same size as ``arrays[i]`` . The non-zero mask elements mark the array elements counted in the histogram.
:param hist: Output histogram, which is a dense or sparse ``dims`` -dimensional array.
- :param dims: Histogram dimensionality that must be positive and not greater than ``CV_MAX_DIMS`` (=32 in the current OpenCV version).
+ :param dims: Histogram dimensionality that must be positive and not greater than ``CV_MAX_DIMS`` (equal to 32 in the current OpenCV version).
:param histSize: Array of histogram sizes in each dimension.
:param narrays: Number of source arrays.
- :param channels: The list of channels that are used to compute the back projection. The number of channels must match the histogram dimensionality. The first array channels are numerated from 0 to ``arrays[0].channels()-1`` , the second array channels are counted from ``arrays[0].channels()`` to ``arrays[0].channels() + arrays[1].channels()-1`` and so on.
+ :param channels: The list of channels used to compute the back projection. The number of channels must match the histogram dimensionality. The first array channels are numerated from 0 to ``arrays[0].channels()-1`` , the second array channels are counted from ``arrays[0].channels()`` to ``arrays[0].channels() + arrays[1].channels()-1``, and so on.
:param hist: Input histogram that can be dense or sparse.
.. ocv:cfunction:: double cvCompareHist( const CvHistogram* hist1, const CvHistogram* hist2, int method )
.. ocv:pyoldfunction:: cv.CompareHist(hist1, hist2, method)->float
- :param H1: The first compared histogram.
+ :param H1: First compared histogram.
- :param H2: The second compared histogram of the same size as ``H1`` .
+ :param H2: Second compared histogram of the same size as ``H1`` .
+
:param method: Comparison method that could be one of the following:
* **CV_COMP_CORREL** Correlation
.. ocv:cfunction:: float cvCalcEMD2( const CvArr* signature1, const CvArr* signature2, int distType, CvDistanceFunction distFunc=NULL, const CvArr* cost=NULL, CvArr* flow=NULL, float* lowerBound=NULL, void* userdata=NULL )
.. ocv:pyoldfunction:: cv.CalcEMD2(signature1, signature2, distType, distFunc=None, cost=None, flow=None, lowerBound=None, userdata=None) -> float
- :param signature1: The first signature, a :math:`\texttt{size1}\times \texttt{dims}+1` floating-point matrix. Each row stores the point weight followed by the point coordinates. The matrix is allowed to have a single column (weights only) if the user-defined cost matrix is used.
+ :param signature1: First signature, a :math:`\texttt{size1}\times \texttt{dims}+1` floating-point matrix. Each row stores the point weight followed by the point coordinates. The matrix is allowed to have a single column (weights only) if the user-defined cost matrix is used.
- :param signature2: The second signature of the same format as ``signature1`` , though the number of rows may be different. The total weights may be different, in this case an extra "dummy" point is added to either ``signature1`` or ``signature2`` .
+ :param signature2: Second signature of the same format as ``signature1`` , though the number of rows may be different. The total weights may be different. In this case an extra "dummy" point is added to either ``signature1`` or ``signature2`` .
- :param distType: Used metric. ``CV_DIST_L1, CV_DIST_L2`` , and ``CV_DIST_C`` stand for one of the standard metrics; ``CV_DIST_USER`` means that a pre-calculated cost matrix ``cost`` is used.
+ :param distType: Used metric. ``CV_DIST_L1, CV_DIST_L2`` , and ``CV_DIST_C`` stand for one of the standard metrics. ``CV_DIST_USER`` means that a pre-calculated cost matrix ``cost`` is used.
- :param distFunc: custom distance function, supported by the old interface. ``CvDistanceFunction`` is defined as: ::
+ :param distFunc: Custom distance function supported by the old interface. ``CvDistanceFunction`` is defined as: ::
typedef float (CV_CDECL * CvDistanceFunction)( const float* a,
const float* b, void* userdata );
where ``a`` and ``b`` are point coordinates and ``userdata`` is the same as the last parameter.
- :param cost: The user-defined :math:`\texttt{size1}\times \texttt{size2}` cost matrix. Also, if a cost matrix is used, lower boundary ``lowerBound`` can not be calculated, because it needs a metric function.
+ :param cost: User-defined :math:`\texttt{size1}\times \texttt{size2}` cost matrix. Also, if a cost matrix is used, lower boundary ``lowerBound`` cannot be calculated because it needs a metric function.
- :param lowerBound: Optional input/output parameter: lower boundary of distance between the two signatures that is a distance between mass centers. The lower boundary may not be calculated if the user-defined cost matrix is used, the total weights of point configurations are not equal, or if the signatures consist of weights only (i.e. the signature matrices have a single column). The user **must** initialize ``*lowerBound`` . If the calculated distance between mass centers is greater or equal to ``*lowerBound`` (it means that the signatures are far enough) the function does not calculate EMD. In any case ``*lowerBound`` is set to the calculated distance between mass centers on return. Thus, if user wants to calculate both distance between mass centers and EMD, ``*lowerBound`` should be set to 0.
+ :param lowerBound: Optional input/output parameter: lower boundary of a distance between the two signatures that is a distance between mass centers. The lower boundary may not be calculated if the user-defined cost matrix is used, the total weights of point configurations are not equal, or if the signatures consist of weights only (the signature matrices have a single column). You **must** initialize ``*lowerBound`` . If the calculated distance between mass centers is greater or equal to ``*lowerBound`` (it means that the signatures are far enough), the function does not calculate EMD. In any case ``*lowerBound`` is set to the calculated distance between mass centers on return. Thus, if you want to calculate both distance between mass centers and EMD, ``*lowerBound`` should be set to 0.
- :param flow: The resultant :math:`\texttt{size1} \times \texttt{size2}` flow matrix: :math:`\texttt{flow}_{i,j}` is a flow from :math:`i` th point of ``signature1`` to :math:`j` th point of ``signature2`` .
+ :param flow: Resultant :math:`\texttt{size1} \times \texttt{size2}` flow matrix: :math:`\texttt{flow}_{i,j}` is a flow from :math:`i` -th point of ``signature1`` to :math:`j` -th point of ``signature2`` .
:param userdata: Optional pointer directly passed to the custom distance function.
Extra Histogram Functions (C API)
---------------------------------
-In the rest of the section additional C functions operating on ``CvHistogram`` are described.
+The rest of the section describes additional C functions operating on ``CvHistogram``.
CalcBackProjectPatch
--------------------
.. ocv:pyoldfunction:: cv.CalcBackProjectPatch(images, dst, patchSize, hist, method, factor)-> None
- :param images: Source images (though, you may pass CvMat** as well)
+ :param images: Source images (though, you may pass CvMat** as well).
- :param dst: Destination image
+ :param dst: Destination image.
- :param patch_size: Size of the patch slid though the source image
+ :param patch_size: Size of the patch slid though the source image.
- :param hist: Histogram
+ :param hist: Histogram.
- :param method: Comparison method, passed to :ocv:cfunc:`CompareHist` (see description of that function)
+ :param method: Comparison method passed to :ocv:cfunc:`CompareHist` (see the function description).
- :param factor: Normalization factor for histograms, will affect the normalization scale of the destination image, pass 1 if unsure
+ :param factor: Normalization factor for histograms that affects the normalization scale of the destination image. Pass 1 if not sure.
-The function calculates the back projection by comparing histograms of the source image patches with the given histogram. The function is similar to :ocv:func:`MatchTemplate`, but instead of comparing raster patch with all its possible positions within the search window, the function ``CalcBackProjectPatch`` compares histograms. Below is the diagram of the algorithm: ::
+The function calculates the back projection by comparing histograms of the source image patches with the given histogram. The function is similar to :ocv:func:`MatchTemplate`, but instead of comparing the raster patch with all its possible positions within the search window, the function ``CalcBackProjectPatch`` compares histograms. See the algorithm diagram below:
.. image:: pics/backprojectpatch.png
.. ocv:pyoldfunction:: cv.CalcProbDensity(hist1, hist2, dsthist, scale=255)-> None
- :param hist1: first histogram (the divisor)
+ :param hist1: First histogram (the divisor).
- :param hist2: second histogram
+ :param hist2: Second histogram.
- :param dsthist: destination histogram
+ :param dsthist: Destination histogram.
- :param scale: scale factor for the destination histogram
+ :param scale: Scale factor for the destination histogram.
-The function calculates the object probability density from the two histograms as:
+The function calculates the object probability density from two histograms as:
.. math::
.. ocv:cfunction:: void cvClearHist( CvHistogram* hist )
.. ocv:pyoldfunction:: cv.ClearHist(hist)-> None
- :param hist: Histogram
+ :param hist: Histogram.
-The function sets all of the histogram bins to 0 in the case of a dense histogram and removes all histogram bins in the case of a sparse array.
+The function sets all of the histogram bins to 0 in case of a dense histogram and removes all histogram bins in case of a sparse array.
CopyHist
.. ocv:cfunction:: void cvCopyHist( const CvHistogram* src, CvHistogram** dst )
- :param src: Source histogram
+ :param src: Source histogram.
- :param dst: Pointer to destination histogram
+ :param dst: Pointer to the destination histogram.
-The function makes a copy of the histogram. If the second histogram pointer ``*dst`` is NULL, a new histogram of the same size as ``src`` is created. Otherwise, both histograms must have equal types and sizes. Then the function copies the source histogram's bin values to the destination histogram and sets the same bin value ranges as in ``src``.
+The function makes a copy of the histogram. If the second histogram pointer ``*dst`` is NULL, a new histogram of the same size as ``src`` is created. Otherwise, both histograms must have equal types and sizes. Then the function copies the bin values of the source histogram to the destination histogram and sets the same bin value ranges as in ``src``.
.. _createhist:
.. ocv:pyoldfunction:: cv.CreateHist(dims, type, ranges, uniform=1) -> hist
- :param dims: Number of histogram dimensions
+ :param dims: Number of histogram dimensions.
- :param sizes: Array of the histogram dimension sizes
+ :param sizes: Array of the histogram dimension sizes.
- :param type: Histogram representation format: ``CV_HIST_ARRAY`` means that the histogram data is represented as a multi-dimensional dense array CvMatND; ``CV_HIST_SPARSE`` means that histogram data is represented as a multi-dimensional sparse array CvSparseMat
+ :param type: Histogram representation format. ``CV_HIST_ARRAY`` means that the histogram data is represented as a multi-dimensional dense array CvMatND. ``CV_HIST_SPARSE`` means that histogram data is represented as a multi-dimensional sparse array ``CvSparseMat``.
- :param ranges: Array of ranges for the histogram bins. Its meaning depends on the ``uniform`` parameter value. The ranges are used for when the histogram is calculated or backprojected to determine which histogram bin corresponds to which value/tuple of values from the input image(s)
+ :param ranges: Array of ranges for the histogram bins. Its meaning depends on the ``uniform`` parameter value. The ranges are used when the histogram is calculated or backprojected to determine which histogram bin corresponds to which value/tuple of values from the input image(s).
- :param uniform: Uniformity flag; if not 0, the histogram has evenly
+ :param uniform: Uniformity flag. If not zero, the histogram has evenly
spaced bins and for every :math:`0<=i<cDims` ``ranges[i]``
is an array of two numbers: lower and upper boundaries for the i-th
histogram dimension.
The whole range [lower,upper] is then split
- into ``dims[i]`` equal parts to determine the ``i-th`` input
+ into ``dims[i]`` equal parts to determine the ``i``-th input
tuple value ranges for every histogram bin. And if ``uniform=0`` ,
- then ``i-th`` element of ``ranges`` array contains ``dims[i]+1`` elements: :math:`\texttt{lower}_0, \texttt{upper}_0,
+ then the ``i``-th element of the ``ranges`` array contains ``dims[i]+1`` elements: :math:`\texttt{lower}_0, \texttt{upper}_0,
\texttt{lower}_1, \texttt{upper}_1 = \texttt{lower}_2,
...
\texttt{upper}_{dims[i]-1}`
where :math:`\texttt{lower}_j` and :math:`\texttt{upper}_j`
are lower and upper
- boundaries of ``i-th`` input tuple value for ``j-th``
+ boundaries of the ``i``-th input tuple value for the ``j``-th
bin, respectively. In either case, the input values that are beyond
- the specified range for a histogram bin are not counted by :ocv:cfunc:`CalcHist` and filled with 0 by :ocv:cfunc:`CalcBackProject`
+ the specified range for a histogram bin are not counted by :ocv:cfunc:`CalcHist` and filled with 0 by :ocv:cfunc:`CalcBackProject`.
-The function creates a histogram of the specified size and returns a pointer to the created histogram. If the array ``ranges`` is 0, the histogram bin ranges must be specified later via the function :ocv:cfunc:`SetHistBinRanges`. Though :ocv:cfunc:`CalcHist` and :ocv:cfunc:`CalcBackProject` may process 8-bit images without setting bin ranges, they assume thy are equally spaced in 0 to 255 bins.
+The function creates a histogram of the specified size and returns a pointer to the created histogram. If the array ``ranges`` is 0, the histogram bin ranges must be specified later via the function :ocv:cfunc:`SetHistBinRanges`. Though :ocv:cfunc:`CalcHist` and :ocv:cfunc:`CalcBackProject` may process 8-bit images without setting bin ranges, they assume they are equally spaced in 0 to 255 bins.
GetHistValue*D
.. ocv:cfunction:: float cvGetHistValue_nD(hist, idx)
- :param hist: Histogram
+ :param hist: Histogram.
- :param idx0: 0-th index
+ :param idx0: 0-th index.
- :param idx1: 1-st index
+ :param idx1: 1-st index.
- :param idx2: 2-nd index
+ :param idx2: 2-nd index.
- :param idx: Array of indices
+ :param idx: Array of indices.
::
..
-The macros ``GetHistValue`` return a pointer to the specified bin of the 1D, 2D, 3D or N-D histogram. In the case of a sparse histogram the function creates a new bin and sets it to 0, unless it exists already.
+The macros ``GetHistValue`` return a pointer to the specified bin of the 1D, 2D, 3D, or N-D histogram. In case of a sparse histogram, the function creates a new bin and sets it to 0, unless it exists already.
GetMinMaxHistValue
.. ocv:pyoldfunction:: cv.GetMinMaxHistValue(hist)-> (minValue, maxValue, minIdx, maxIdx)
- :param hist: Histogram
+ :param hist: Histogram.
- :param min_value: Pointer to the minimum value of the histogram
+ :param min_value: Pointer to the minimum value of the histogram.
- :param max_value: Pointer to the maximum value of the histogram
+ :param max_value: Pointer to the maximum value of the histogram.
- :param min_idx: Pointer to the array of coordinates for the minimum
+ :param min_idx: Pointer to the array of coordinates for the minimum.
- :param max_idx: Pointer to the array of coordinates for the maximum
+ :param max_idx: Pointer to the array of coordinates for the maximum.
-The function finds the minimum and maximum histogram bins and their positions. All of output arguments are optional. Among several extremas with the same value the ones with the minimum index (in lexicographical order) are returned. In the case of several maximums or minimums, the earliest in lexicographical order (extrema locations) is returned.
+The function finds the minimum and maximum histogram bins and their positions. All of output arguments are optional. Among several extremas with the same value the ones with the minimum index (in the lexicographical order) are returned. In case of several maximums or minimums, the earliest in the lexicographical order (extrema locations) is returned.
MakeHistHeaderForArray
.. ocv:cfunction:: CvHistogram* cvMakeHistHeaderForArray( int dims, int* sizes, CvHistogram* hist, float* data, float** ranges=NULL, int uniform=1 )
- :param dims: Number of histogram dimensions
+ :param dims: Number of the histogram dimensions.
- :param sizes: Array of the histogram dimension sizes
+ :param sizes: Array of the histogram dimension sizes.
- :param hist: The histogram header initialized by the function
+ :param hist: Histogram header initialized by the function.
- :param data: Array that will be used to store histogram bins
+ :param data: Array used to store histogram bins.
- :param ranges: Histogram bin ranges, see :ocv:cfunc:`CreateHist`
+ :param ranges: Histogram bin ranges. See :ocv:cfunc:`CreateHist` for details.
- :param uniform: Uniformity flag, see :ocv:cfunc:`CreateHist`
+ :param uniform: Uniformity flag. See :ocv:cfunc:`CreateHist` for details.
The function initializes the histogram, whose header and bins are allocated by the user. :ocv:cfunc:`ReleaseHist` does not need to be called afterwards. Only dense histograms can be initialized this way. The function returns ``hist``.
.. ocv:cfunction:: void cvNormalizeHist( CvHistogram* hist, double factor )
.. ocv:pyoldfunction:: cv.NormalizeHist(hist, factor)-> None
- :param hist: Pointer to the histogram
+ :param hist: Pointer to the histogram.
- :param factor: Normalization factor
+ :param factor: Normalization factor.
-The function normalizes the histogram bins by scaling them, such that the sum of the bins becomes equal to ``factor``.
+The function normalizes the histogram bins by scaling them so that the sum of the bins becomes equal to ``factor``.
QueryHistValue*D
.. ocv:pyoldfunction:: cv.QueryHistValue_3D(hist, idx0, idx1, idx2) -> float
.. ocv:pyoldfunction:: cv.QueryHistValueND(hist, idx) -> float
- :param hist: Histogram
+ :param hist: Histogram.
- :param idx0: 0-th index
+ :param idx0: 0-th index.
- :param idx1: 1-st index
+ :param idx1: 1-st index.
- :param idx2: 2-nd index
+ :param idx2: 2-nd index.
- :param idx: Array of indices
+ :param idx: Array of indices.
-The macros return the value of the specified bin of the 1D, 2D, 3D or N-D histogram. In the case of a sparse histogram the function returns 0, if the bin is not present in the histogram no new bin is created.
+The macros return the value of the specified bin of the 1D, 2D, 3D, or N-D histogram. In case of a sparse histogram, the function returns 0. If the bin is not present in the histogram, no new bin is created.
ReleaseHist
-----------
.. ocv:cfunction:: void cvReleaseHist( CvHistogram** hist )
- :param hist: Double pointer to the released histogram
+ :param hist: Double pointer to the released histogram.
The function releases the histogram (header and the data). The pointer to the histogram is cleared by the function. If ``*hist`` pointer is already ``NULL``, the function does nothing.
.. ocv:cfunction:: void cvSetHistBinRanges( CvHistogram* hist, float** ranges, int uniform=1 )
- :param hist: Histogram
+ :param hist: Histogram.
- :param ranges: Array of bin ranges arrays, see :ocv:cfunc:`CreateHist`
+ :param ranges: Array of bin ranges arrays. See :ocv:cfunc:`CreateHist` for details.
- :param uniform: Uniformity flag, see :ocv:cfunc:`CreateHist`
+ :param uniform: Uniformity flag. See :ocv:cfunc:`CreateHist` for details.
-The function is a stand-alone function for setting bin ranges in the histogram. For a more detailed description of the parameters ``ranges`` and ``uniform`` see the :ocv:cfunc:`CalcHist` function, that can initialize the ranges as well. Ranges for the histogram bins must be set before the histogram is calculated or the backproject of the histogram is calculated.
+This is a standalone function for setting bin ranges in the histogram. For a more detailed description of the parameters ``ranges`` and ``uniform``, see the :ocv:cfunc:`CalcHist` function that can initialize the ranges as well. Ranges for the histogram bins must be set before the histogram is calculated or the backproject of the histogram is calculated.
ThreshHist
.. ocv:cfunction:: void cvThreshHist( CvHistogram* hist, double threshold )
.. ocv:pyoldfunction:: cv.ThreshHist(hist, threshold)-> None
- :param hist: Pointer to the histogram
+ :param hist: Pointer to the histogram.
- :param threshold: Threshold level
+ :param threshold: Threshold level.
The function clears histogram bins that are below the specified threshold.
.. ocv:cfunction:: void cvCalcPGH( const CvSeq* contour, CvHistogram* hist )
.. ocv:pyoldfunction:: cv.CalcPGH(contour, hist)-> None
- :param contour: Input contour. Currently, only integer point coordinates are allowed
+ :param contour: Input contour. Currently, only integer point coordinates are allowed.
- :param hist: Calculated histogram; must be two-dimensional
+ :param hist: Calculated histogram. It must be two-dimensional.
The function calculates a 2D pair-wise geometrical histogram (PGH), described in [Iivarinen97]_ for the contour. The algorithm considers every pair of contour
edges. The angle between the edges and the minimum/maximum distances
-are determined for every pair. To do this each of the edges in turn
+are determined for every pair. To do this, each of the edges in turn
is taken as the base, while the function loops through all the other
edges. When the base edge and any other edge are considered, the minimum
and maximum distances from the points on the non-base edge and line of
between the calculated minimum and maximum distances are incremented
(that is, the histogram is transposed relatively to the definition in the original paper). The histogram can be used for contour matching.
-.. [RubnerSept98] Y. Rubner. C. Tomasi, L.J. Guibas. The Earth Mover’s Distance as a Metric for Image Retrieval. Technical Report STAN-CS-TN-98-86, Department of Computer Science, Stanford University, September 1998.
+.. [RubnerSept98] Y. Rubner. C. Tomasi, L.J. Guibas. *The Earth Mover’s Distance as a Metric for Image Retrieval*. Technical Report STAN-CS-TN-98-86, Department of Computer Science, Stanford University, September 1998.
-.. [Iivarinen97] Jukka Iivarinen, Markus Peura, Jaakko Srel, and Ari Visa. Comparison of Combined Shape Descriptors for Irregular Objects, 8th British Machine Vision Conference, BMVC'97. http://www.cis.hut.fi/research/IA/paper/publications/bmvc97/bmvc97.html
\ No newline at end of file
+.. [Iivarinen97] Jukka Iivarinen, Markus Peura, Jaakko Srel, and Ari Visa. *Comparison of Combined Shape Descriptors for Irregular Objects*, 8th British Machine Vision Conference, BMVC'97. http://www.cis.hut.fi/research/IA/paper/publications/bmvc97/bmvc97.html
\ No newline at end of file
:param dst: Destination image of the same size and depth as ``src`` .
- :param code: Color space conversion code. See the description below.
+ :param code: Color space conversion code. See the description below.
:param dstCn: Number of channels in the destination image. If the parameter is 0, the number of the channels is derived automatically from ``src`` and ``code`` .
``CV_DIST_L2`` :math:`(5\times 5)` a=1, b=1.4, c=2.1969 \
============== =================== ======================
-Typically, for a fast, coarse distance estimation ``CV_DIST_L2``,a
+Typically, for a fast, coarse distance estimation ``CV_DIST_L2``, a
:math:`3\times 3` mask is used. For a more accurate distance estimation ``CV_DIST_L2`` , a
:math:`5\times 5` mask or the precise algorithm is used.
Note that both the precise and the approximate algorithms are linear on the number of pixels.
:param mask: (For the second function only) Operation mask that should be a single-channel 8-bit image, 2 pixels wider and 2 pixels taller. The function uses and updates the mask, so you take responsibility of initializing the ``mask`` content. Flood-filling cannot go across non-zero pixels in the mask. For example, an edge detector output can be used as a mask to stop filling at edges. It is possible to use the same mask in multiple calls to the function to make sure the filled area does not overlap.
- **Note** : Since the mask is larger than the filled image, a pixel :math:`(x, y)` in ``image`` corresponds to the pixel :math:`(x+1, y+1)` in the ``mask`` .
+ .. note::
+ Since the mask is larger than the filled image, a pixel :math:`(x, y)` in ``image`` corresponds to the pixel :math:`(x+1, y+1)` in the ``mask`` .
+
:param seed: Starting point.
:param newVal: New value of the repainted domain pixels.
markers is set to a value of the "seed" components or to -1 at
boundaries between the regions.
-**Note**: Every two neighbor connected
+.. note:: Every two neighbor connected
components are not necessarily separated by a watershed boundary (-1's pixels); for
example, when such tangent components exist in the initial
marker image. Visual demonstration and usage example of the function
:param pt: Point to locate.
- :param edge: Output edge the point falls onto or right to.
+ :param edge: Output edge that the point belongs to or is located to the right of it.
:param vertex: Optional output vertex double pointer the input point coinsides with.
.. ocv:cfunction:: void cvMoments( const CvArr* array, CvMoments* moments, int binary=0 )
.. ocv:pyoldfunction:: cv.Moments(array, binary=0) -> moments
- :param array: A raster image (single-channel, 8-bit or floating-point 2D array) or an array ( :math:`1 \times N` or :math:`N \times 1` ) of 2D points (``Point`` or ``Point2f`` ).
+ :param array: Raster image (single-channel, 8-bit or floating-point 2D array) or an array ( :math:`1 \times N` or :math:`N \times 1` ) of 2D points (``Point`` or ``Point2f`` ).
:param binaryImage: If it is true, all non-zero image pixels are treated as 1's. The parameter is used for images only.
\texttt{nu} _{ji}= \frac{\texttt{mu}_{ji}}{\texttt{m}_{00}^{(i+j)/2+1}} .
-**Note**:
+.. note::
:math:`\texttt{mu}_{00}=\texttt{m}_{00}`,
:math:`\texttt{nu}_{00}=1`
:math:`\texttt{nu}_{10}=\texttt{mu}_{10}=\texttt{mu}_{01}=\texttt{mu}_{10}=0` , hence the values are not stored.
The function retrieves contours from the binary image using the algorithm
[Suzuki85]_. The contours are a useful tool for shape analysis and object detection and recognition. See ``squares.c`` in the OpenCV sample directory.
-**Note**:
+.. note::
Source ``image`` is modified by this function.
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