src/content/common/media/video_capture_messages.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/shared_memory.h"
   6 #include "content/common/content_export.h"
   7 #include "content/common/media/video_capture.h"
   8 #include "content/public/common/common_param_traits.h"
   9 #include "ipc/ipc_message_macros.h"
  10 #include "media/video/capture/video_capture_types.h"
  11
  12 #undef IPC_MESSAGE_EXPORT
  13 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
  14 #define IPC_MESSAGE_START VideoCaptureMsgStart
  15
  16 IPC_ENUM_TRAITS_MAX_VALUE(content::VideoCaptureState,
  17                           content::VIDEO_CAPTURE_STATE_LAST)
  18
  19 IPC_STRUCT_TRAITS_BEGIN(media::VideoCaptureParams)
  20   IPC_STRUCT_TRAITS_MEMBER(requested_format)
  21   IPC_STRUCT_TRAITS_MEMBER(allow_resolution_change)
  22 IPC_STRUCT_TRAITS_END()
  23
  24 // TODO(nick): device_id in these messages is basically just a route_id. We
  25 // should shift to IPC_MESSAGE_ROUTED and use MessageRouter in the filter impls.
  26
  27 // Notify the renderer process about the state update such as
  28 // Start/Pause/Stop.
  29 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_StateChanged,
  30                      int /* device id */,
  31                      content::VideoCaptureState /* new state */)
  32
  33 // Tell the renderer process that a new buffer is allocated for video capture.
  34 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_NewBuffer,
  35                      int /* device id */,
  36                      base::SharedMemoryHandle /* handle */,
  37                      int /* length */,
  38                      int /* buffer_id */)
  39
  40 // Tell the renderer process that it should release a buffer previously
  41 // allocated by VideoCaptureMsg_NewBuffer.
  42 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_FreeBuffer,
  43                      int /* device id */,
  44                      int /* buffer_id */)
  45
  46 // Tell the renderer process that a buffer is available from video capture.
  47 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_BufferReady,
  48                      int /* device id */,
  49                      int /* buffer_id */,
  50                      base::TimeTicks /* timestamp */,
  51                      media::VideoCaptureFormat /* resolution */)
  52
  53 // Notify the renderer about a device's supported formats; this is a response
  54 // to a VideoCaptureHostMsg_GetDeviceSupportedFormats request.
  55 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_DeviceSupportedFormatsEnumerated,
  56                      int /* device_id */,
  57                      media::VideoCaptureFormats /* supported_formats */)
  58
  59 // Notify the renderer about a device's format(s) in use; this is a response
  60 // to a VideoCaptureHostMsg_GetDeviceFormatInUse request.
  61 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_DeviceFormatsInUseReceived,
  62                      int /* device_id */,
  63                      media::VideoCaptureFormats /* formats_in_use */)
  64
  65 // Start a video capture as |device_id|, a new id picked by the renderer
  66 // process. The session to be started is determined by |params.session_id|.
  67 IPC_MESSAGE_CONTROL3(VideoCaptureHostMsg_Start,
  68                      int /* device_id */,
  69                      media::VideoCaptureSessionId, /* session_id */
  70                      media::VideoCaptureParams /* params */)
  71
  72 // Pause the video capture specified by |device_id|.
  73 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Pause,
  74                      int /* device_id */)
  75
  76 // Close the video capture specified by |device_id|.
  77 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Stop,
  78                      int /* device_id */)
  79
  80 // Tell the browser process that the renderer has finished reading from
  81 // a buffer previously delivered by VideoCaptureMsg_BufferReady.
  82 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_BufferReady,
  83                      int /* device_id */,
  84                      int /* buffer_id */)
  85
  86 // Get the formats supported by a device referenced by |capture_session_id|.
  87 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_GetDeviceSupportedFormats,
  88                      int /* device_id */,
  89                      media::VideoCaptureSessionId /* session_id */)
  90
  91 // Get the format(s) in use by a device referenced by |capture_session_id|.
  92 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_GetDeviceFormatsInUse,
  93                      int /* device_id */,
  94                      media::VideoCaptureSessionId /* session_id */)