Added basic tutorial 8

diff --git a/gst-sdk/tutorials/basic-tutorial-8.c b/gst-sdk/tutorials/basic-tutorial-8.c
new file mode 100644 (file)
index 0000000..48e3e81
--- /dev/null
+++ b/gst-sdk/tutorials/basic-tutorial-8.c
@@ -0,0 +1,231 @@
+#include <gst/gst.h>
+#include <string.h>
+#include <math.h>
+  
+#define CHUNK_SIZE 1024   /* Amount of bytes we are sending in each buffer */
+#define SAMPLE_RATE 44100 /* Samples per second we are sending */
+#define AUDIO_CAPS "audio/x-raw-int,channels=1,rate=%d,signed=(boolean)true,width=16,depth=16,endianness=1234"
+  
+/* Structure to contain all our information, so we can pass it to callbacks */
+typedef struct _CustomData {
+  GstElement *pipeline, *app_source, *tee, *audio_queue, *audio_convert1, *audio_sink;
+  GstElement *video_queue, *audio_convert2, *visual, *video_convert, *video_sink;
+  GstElement *app_queue, *app_sink;
+  
+  gint time;             /* For timestamp generation */
+  gfloat a, b, c, d;     /* For waveform generation */
+  
+  guint sourceid;        /* To control the GSource */
+  
+  GMainLoop *main_loop;  /* GLib's Main Loop */
+} CustomData;
+  
+/* This method is called by the idle GSource in the mainloop, to feed CHUNK_SIZE bytes into appsrc.
+ * The ide handler is added to the mainloop when appsrc requests us to start sending data (need-data signal)
+ *  and is removed when appsrc has enough data (enough-data signal).
+ */
+static gboolean push_data (CustomData *data) {
+  GstBuffer *buffer;
+  GstFlowReturn ret;
+  int i;
+  gshort *raw;
+  gint num_samples = CHUNK_SIZE / 2; /* Because each sample is 16 bits */
+  gfloat freq;
+  
+  /* Create a new empty buffer */
+  buffer = gst_buffer_new_and_alloc (CHUNK_SIZE);
+  
+  /* Set its timestamp and duration */
+  GST_BUFFER_TIMESTAMP (buffer) = GST_SECOND * data->time / SAMPLE_RATE;
+  GST_BUFFER_DURATION (buffer) = GST_SECOND * CHUNK_SIZE / SAMPLE_RATE;
+  
+  /* Generate some psychodelic waveforms */
+  raw = (gshort *)GST_BUFFER_DATA (buffer);
+  data->c += data->d;
+  data->d -= data->c / 1000;
+  freq = 1100 + 1000 * data->d;
+  for (i = 0; i < num_samples; i++) {
+    data->a += data->b;
+    data->b -= data->a / freq;
+    raw[i] = (gshort)(500 * data->a);
+  }
+  data->time += num_samples;
+  
+  /* Push the buffer into the appsrc */
+  g_signal_emit_by_name (data->app_source, "push-buffer", buffer, &ret);
+  
+  /* Free the buffer now that we are done with it */
+  gst_buffer_unref (buffer);
+  
+  if (ret != GST_FLOW_OK) {
+    /* We got some error, stop sending data */
+    return FALSE;
+  }
+  
+  return TRUE;
+}
+  
+/* This signal callback triggers when appsrc needs data. Here, we add an idle handler
+ * to the mainloop to start pushing data into the appsrc */
+static void start_feed (GstElement *playbin, guint size, CustomData *data) {
+  if (data->sourceid == 0) {
+    g_print ("Start feeding\n");
+    data->sourceid = g_idle_add ((GSourceFunc) push_data, data);
+  }
+}
+  
+/* This callback triggers when appsrc has enough data and we can stop sending.
+ * We remove the idle handler from the mainloop */
+static void stop_feed (GstElement *playbin, CustomData *data) {
+  if (data->sourceid != 0) {
+    g_print ("Stop feeding\n");
+    g_source_remove (data->sourceid);
+    data->sourceid = 0;
+  }
+}
+  
+/* The appsink has received a buffer */
+static void new_buffer (GstElement *sink, CustomData *data) {
+  GstBuffer *buffer;
+  
+  /* Retrieve the buffer */
+  g_signal_emit_by_name (sink, "pull-buffer", &buffer);
+  if (buffer) {
+    /* The only thing we do in this example is print a * to indicate a received buffer */
+    g_print ("*");
+    gst_buffer_unref (buffer);
+  }
+}
+  
+/* This function is called when an error message is posted on the bus */
+static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
+  GError *err;
+  gchar *debug_info;
+  
+  /* Print error details on the screen */
+  gst_message_parse_error (msg, &err, &debug_info);
+  g_printerr ("Error received from element %s: %s\n", GST_OBJECT_NAME (msg->src), err->message);
+  g_printerr ("Debugging information: %s\n", debug_info ? debug_info : "none");
+  g_clear_error (&err);
+  g_free (debug_info);
+  
+  g_main_loop_quit (data->main_loop);
+}
+  
+int main(int argc, char *argv[]) {
+  CustomData data;
+  GstPadTemplate *tee_src_pad_template;
+  GstPad *tee_audio_pad, *tee_video_pad, *tee_app_pad;
+  GstPad *queue_audio_pad, *queue_video_pad, *queue_app_pad;
+  gchar *audio_caps_text;
+  GstCaps *audio_caps;
+  GstBus *bus;
+  
+  /* Initialize cumstom data structure */
+  memset (&data, 0, sizeof (data));
+  data.b = 1; /* For waveform generation */
+  data.d = 1;
+  
+  /* Initialize GStreamer */
+  gst_init (&argc, &argv);
+  
+  /* Create the elements */
+  data.app_source = gst_element_factory_make ("appsrc", "audio_source");
+  data.tee = gst_element_factory_make ("tee", "tee");
+  data.audio_queue = gst_element_factory_make ("queue", "audio_queue");
+  data.audio_convert1 = gst_element_factory_make ("audioconvert", "audio_convert1");
+  data.audio_sink = gst_element_factory_make ("autoaudiosink", "audio_sink");
+  data.video_queue = gst_element_factory_make ("queue", "video_queue");
+  data.audio_convert2 = gst_element_factory_make ("audioconvert", "audio_convert2");
+  data.visual = gst_element_factory_make ("wavescope", "visual");
+  data.video_convert = gst_element_factory_make ("ffmpegcolorspace", "csp");
+  data.video_sink = gst_element_factory_make ("autovideosink", "video_sink");
+  data.app_queue = gst_element_factory_make ("queue", "app_queue");
+  data.app_sink = gst_element_factory_make ("appsink", "app_sink");
+  
+  /* Create the empty pipeline */
+  data.pipeline = gst_pipeline_new ("test-pipeline");
+  
+  if (!data.pipeline || !data.app_source || !data.tee || !data.audio_queue || !data.audio_convert1 || !data.audio_sink ||
+      !data.video_queue || !data.audio_convert2 || !data.visual || !data.video_convert || !data.video_sink || !data.app_queue || !data.app_sink) {
+    g_printerr ("Not all elements could be created.\n");
+    return -1;
+  }
+  
+  /* Configure wavescope */
+  g_object_set (data.visual, "shader", 0, "style", 0, NULL);
+  
+  /* Configure appsrc */
+  audio_caps_text = g_strdup_printf (AUDIO_CAPS, SAMPLE_RATE);
+  audio_caps = gst_caps_from_string (audio_caps_text);
+  g_object_set (data.app_source, "caps", audio_caps, NULL);
+  g_signal_connect (data.app_source, "need-data", G_CALLBACK (start_feed), &data);
+  g_signal_connect (data.app_source, "enough-data", G_CALLBACK (stop_feed), &data);
+  
+  /* Configure appsink */
+  g_object_set (data.app_sink, "emit-signals", TRUE, "caps", audio_caps, NULL);
+  g_signal_connect (data.app_sink, "new-buffer", G_CALLBACK (new_buffer), &data);
+  gst_caps_unref (audio_caps);
+  g_free (audio_caps_text);
+  
+  /* Link all elements that can be automatically linked because they have "Always" pads */
+  gst_bin_add_many (GST_BIN (data.pipeline), data.app_source, data.tee, data.audio_queue, data.audio_convert1,
+      data.audio_sink, data.video_queue, data.audio_convert2, data.visual, data.video_convert, data.video_sink, data.app_queue,
+      data.app_sink, NULL);
+  if (gst_element_link_many (data.app_source, data.tee, NULL) != TRUE ||
+      gst_element_link_many (data.audio_queue, data.audio_convert1, data.audio_sink, NULL) != TRUE ||
+      gst_element_link_many (data.video_queue, data.audio_convert2, data.visual, data.video_convert, data.video_sink, NULL) != TRUE ||
+      gst_element_link_many (data.app_queue, data.app_sink, NULL) != TRUE) {
+    g_printerr ("Elements could not be linked.\n");
+    gst_object_unref (data.pipeline);
+    return -1;
+  }
+  
+  /* Manually link the Tee, which has "Request" pads */
+  tee_src_pad_template = gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (data.tee), "src%d");
+  tee_audio_pad = gst_element_request_pad (data.tee, tee_src_pad_template, NULL, NULL);
+  g_print ("Obtained request pad %s for audio branch.\n", gst_pad_get_name (tee_audio_pad));
+  queue_audio_pad = gst_element_get_static_pad (data.audio_queue, "sink");
+  tee_video_pad = gst_element_request_pad (data.tee, tee_src_pad_template, NULL, NULL);
+  g_print ("Obtained request pad %s for video branch.\n", gst_pad_get_name (tee_video_pad));
+  queue_video_pad = gst_element_get_static_pad (data.video_queue, "sink");
+  tee_app_pad = gst_element_request_pad (data.tee, tee_src_pad_template, NULL, NULL);
+  g_print ("Obtained request pad %s for app branch.\n", gst_pad_get_name (tee_app_pad));
+  queue_app_pad = gst_element_get_static_pad (data.app_queue, "sink");
+  if (gst_pad_link (tee_audio_pad, queue_audio_pad) != GST_PAD_LINK_OK ||
+      gst_pad_link (tee_video_pad, queue_video_pad) != GST_PAD_LINK_OK ||
+      gst_pad_link (tee_app_pad, queue_app_pad) != GST_PAD_LINK_OK) {
+    g_printerr ("Tee could not be linked\n");
+    gst_object_unref (data.pipeline);
+    return -1;
+  }
+  gst_object_unref (queue_audio_pad);
+  gst_object_unref (queue_video_pad);
+  gst_object_unref (queue_app_pad);
+  
+  /* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
+  bus = gst_element_get_bus (data.pipeline);
+  gst_bus_add_signal_watch (bus);
+  g_signal_connect (G_OBJECT (bus), "message::error", (GCallback)error_cb, &data);
+  gst_object_unref (bus);
+  
+  /* Start playing the pipeline */
+  gst_element_set_state (data.pipeline, GST_STATE_PLAYING);
+  
+  /* Create a GLib Main Loop and set it to run */
+  data.main_loop = g_main_loop_new (NULL, FALSE);
+  g_main_loop_run (data.main_loop);
+  
+  /* Release the request pads from the Tee, and unref them */
+  gst_element_release_request_pad (data.tee, tee_audio_pad);
+  gst_element_release_request_pad (data.tee, tee_video_pad);
+  gst_element_release_request_pad (data.tee, tee_app_pad);
+  gst_object_unref (tee_audio_pad);
+  gst_object_unref (tee_video_pad);
+  gst_object_unref (tee_app_pad);
+  
+  /* Free resources */
+  gst_element_set_state (data.pipeline, GST_STATE_NULL);
+  gst_object_unref (data.pipeline);
+  return 0;
+}

diff --git a/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj b/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj
new file mode 100644 (file)
index 0000000..9d1d4eb
--- /dev/null
+++ b/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj
@@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="utf-8"?>\r
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">\r
+  <ItemGroup Label="ProjectConfigurations">\r
+    <ProjectConfiguration Include="Debug|Win32">\r
+      <Configuration>Debug</Configuration>\r
+      <Platform>Win32</Platform>\r
+    </ProjectConfiguration>\r
+    <ProjectConfiguration Include="Release|Win32">\r
+      <Configuration>Release</Configuration>\r
+      <Platform>Win32</Platform>\r
+    </ProjectConfiguration>\r
+  </ItemGroup>\r
+  <PropertyGroup Label="Globals">\r
+    <ProjectGuid>{12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}</ProjectGuid>\r
+    <Keyword>Win32Proj</Keyword>\r
+    <RootNamespace>basictutorial8</RootNamespace>\r
+  </PropertyGroup>\r
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />\r
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">\r
+    <ConfigurationType>Application</ConfigurationType>\r
+    <UseDebugLibraries>true</UseDebugLibraries>\r
+    <CharacterSet>Unicode</CharacterSet>\r
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+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">\r
+    <ConfigurationType>Application</ConfigurationType>\r
+    <UseDebugLibraries>false</UseDebugLibraries>\r
+    <WholeProgramOptimization>true</WholeProgramOptimization>\r
+    <CharacterSet>Unicode</CharacterSet>\r
+  </PropertyGroup>\r
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />\r
+  <ImportGroup Label="ExtensionSettings">\r
+  </ImportGroup>\r
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />\r
+    <Import Project="..\..\..\..\..\gstreamer-sdk\2012.5\x86\share\vs\2010\libs\gstreamer-0.10.props" />\r
+    <Import Project="..\..\..\..\..\gstreamer-sdk\2012.5\x86\share\vs\2010\msvc\x86.props" />\r
+  </ImportGroup>\r
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">\r
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />\r
+    <Import Project="..\..\..\..\..\gstreamer-sdk\2012.5\x86\share\vs\2010\libs\gstreamer-0.10.props" />\r
+    <Import Project="..\..\..\..\..\gstreamer-sdk\2012.5\x86\share\vs\2010\msvc\x86.props" />\r
+  </ImportGroup>\r
+  <PropertyGroup Label="UserMacros" />\r
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">\r
+    <LinkIncremental>true</LinkIncremental>\r
+  </PropertyGroup>\r
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">\r
+    <LinkIncremental>false</LinkIncremental>\r
+  </PropertyGroup>\r
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">\r
+    <ClCompile>\r
+      <PrecompiledHeader>\r
+      </PrecompiledHeader>\r
+      <WarningLevel>Level3</WarningLevel>\r
+      <Optimization>Disabled</Optimization>\r
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>\r
+    </ClCompile>\r
+    <Link>\r
+      <SubSystem>Console</SubSystem>\r
+      <GenerateDebugInformation>true</GenerateDebugInformation>\r
+    </Link>\r
+  </ItemDefinitionGroup>\r
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">\r
+    <ClCompile>\r
+      <WarningLevel>Level3</WarningLevel>\r
+      <PrecompiledHeader>\r
+      </PrecompiledHeader>\r
+      <Optimization>MaxSpeed</Optimization>\r
+      <FunctionLevelLinking>true</FunctionLevelLinking>\r
+      <IntrinsicFunctions>true</IntrinsicFunctions>\r
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>\r
+    </ClCompile>\r
+    <Link>\r
+      <SubSystem>Console</SubSystem>\r
+      <GenerateDebugInformation>true</GenerateDebugInformation>\r
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>\r
+    </Link>\r
+  </ItemDefinitionGroup>\r
+  <ItemGroup>\r
+    <ClCompile Include="..\..\..\..\gst-sdk\tutorials\basic-tutorial-8.c" />\r
+  </ItemGroup>\r
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />\r
+  <ImportGroup Label="ExtensionTargets">\r
+  </ImportGroup>\r
+</Project>
\ No newline at end of file

diff --git a/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj.filters b/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj.filters
new file mode 100644 (file)
index 0000000..368db13
--- /dev/null
+++ b/vs/2010/tutorials/basic-tutorial-8/basic-tutorial-8.vcxproj.filters
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>\r
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">\r
+  <ItemGroup>\r
+    <ClCompile Include="..\..\..\..\gst-sdk\tutorials\basic-tutorial-8.c" />\r
+  </ItemGroup>\r
+</Project>
\ No newline at end of file

diff --git a/vs/2010/tutorials/tutorials.sln b/vs/2010/tutorials/tutorials.sln
index 3e2720f..238a658 100644 (file)
--- a/vs/2010/tutorials/tutorials.sln
+++ b/vs/2010/tutorials/tutorials.sln
@@ -19,6 +19,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "basic-tutorial-6", "basic-t
 EndProject\r
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "basic-tutorial-7", "basic-tutorial-7\basic-tutorial-7.vcxproj", "{B1666543-AE05-46BF-9528-95916A02A9D4}"\r
 EndProject\r
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "basic-tutorial-8", "basic-tutorial-8\basic-tutorial-8.vcxproj", "{12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}"\r
+EndProject\r
 Global\r
        GlobalSection(SolutionConfigurationPlatforms) = preSolution\r
                Debug|Win32 = Debug|Win32\r
@@ -61,6 +63,10 @@ Global
                {B1666543-AE05-46BF-9528-95916A02A9D4}.Debug|Win32.Build.0 = Debug|Win32\r
                {B1666543-AE05-46BF-9528-95916A02A9D4}.Release|Win32.ActiveCfg = Release|Win32\r
                {B1666543-AE05-46BF-9528-95916A02A9D4}.Release|Win32.Build.0 = Release|Win32\r
+               {12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}.Debug|Win32.ActiveCfg = Debug|Win32\r
+               {12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}.Debug|Win32.Build.0 = Debug|Win32\r
+               {12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}.Release|Win32.ActiveCfg = Release|Win32\r
+               {12F59BBB-208F-4F78-BB9C-4A15D2A9AB2E}.Release|Win32.Build.0 = Release|Win32\r
        EndGlobalSection\r
        GlobalSection(SolutionProperties) = preSolution\r
                HideSolutionNode = FALSE\r