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 "gpu/command_buffer/common/mailbox_holder.h"
  10 #include "ipc/ipc_message_macros.h"
  11 #include "media/video/capture/video_capture_types.h"
  12
  13 #undef IPC_MESSAGE_EXPORT
  14 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
  15 #define IPC_MESSAGE_START VideoCaptureMsgStart
  16
  17 IPC_ENUM_TRAITS_MAX_VALUE(content::VideoCaptureState,
  18                           content::VIDEO_CAPTURE_STATE_LAST)
  19
  20 IPC_STRUCT_TRAITS_BEGIN(media::VideoCaptureParams)
  21   IPC_STRUCT_TRAITS_MEMBER(requested_format)
  22   IPC_STRUCT_TRAITS_MEMBER(allow_resolution_change)
  23 IPC_STRUCT_TRAITS_END()
  24
  25 // TODO(nick): device_id in these messages is basically just a route_id. We
  26 // should shift to IPC_MESSAGE_ROUTED and use MessageRouter in the filter impls.
  27
  28 // Notify the renderer process about the state update such as
  29 // Start/Pause/Stop.
  30 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_StateChanged,
  31                      int /* device id */,
  32                      content::VideoCaptureState /* new state */)
  33
  34 // Tell the renderer process that a new buffer is allocated for video capture.
  35 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_NewBuffer,
  36                      int /* device id */,
  37                      base::SharedMemoryHandle /* handle */,
  38                      int /* length */,
  39                      int /* buffer_id */)
  40
  41 // Tell the renderer process that it should release a buffer previously
  42 // allocated by VideoCaptureMsg_NewBuffer.
  43 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_FreeBuffer,
  44                      int /* device id */,
  45                      int /* buffer_id */)
  46
  47 // Tell the renderer process that a buffer is available from video capture.
  48 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_BufferReady,
  49                      int /* device id */,
  50                      int /* buffer_id */,
  51                      media::VideoCaptureFormat /* format */,
  52                      base::TimeTicks /* timestamp */)
  53
  54 // Tell the renderer process that a texture mailbox buffer is available from
  55 // video capture.
  56 IPC_MESSAGE_CONTROL5(VideoCaptureMsg_MailboxBufferReady,
  57                      int /* device_id */,
  58                      int /* buffer_id */,
  59                      gpu::MailboxHolder /* mailbox_holder */,
  60                      media::VideoCaptureFormat /* format */,
  61                      base::TimeTicks /* timestamp */)
  62
  63 // Notify the renderer about a device's supported formats; this is a response
  64 // to a VideoCaptureHostMsg_GetDeviceSupportedFormats request.
  65 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_DeviceSupportedFormatsEnumerated,
  66                      int /* device_id */,
  67                      media::VideoCaptureFormats /* supported_formats */)
  68
  69 // Notify the renderer about a device's format(s) in use; this is a response
  70 // to a VideoCaptureHostMsg_GetDeviceFormatInUse request.
  71 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_DeviceFormatsInUseReceived,
  72                      int /* device_id */,
  73                      media::VideoCaptureFormats /* formats_in_use */)
  74
  75 // Start a video capture as |device_id|, a new id picked by the renderer
  76 // process. The session to be started is determined by |params.session_id|.
  77 IPC_MESSAGE_CONTROL3(VideoCaptureHostMsg_Start,
  78                      int /* device_id */,
  79                      media::VideoCaptureSessionId, /* session_id */
  80                      media::VideoCaptureParams /* params */)
  81
  82 // Pause the video capture specified by |device_id|.
  83 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Pause,
  84                      int /* device_id */)
  85
  86 // Close the video capture specified by |device_id|.
  87 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Stop,
  88                      int /* device_id */)
  89
  90 // Tell the browser process that the renderer has finished reading from
  91 // a buffer previously delivered by VideoCaptureMsg_BufferReady.
  92 IPC_MESSAGE_CONTROL3(VideoCaptureHostMsg_BufferReady,
  93                      int /* device_id */,
  94                      int /* buffer_id */,
  95                      uint32 /* syncpoint */)
  96
  97 // Get the formats supported by a device referenced by |capture_session_id|.
  98 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_GetDeviceSupportedFormats,
  99                      int /* device_id */,
 100                      media::VideoCaptureSessionId /* session_id */)
 101
 102 // Get the format(s) in use by a device referenced by |capture_session_id|.
 103 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_GetDeviceFormatsInUse,
 104                      int /* device_id */,
 105                      media::VideoCaptureSessionId /* session_id */)