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(content::VideoCaptureState) 17 18 IPC_STRUCT_TRAITS_BEGIN(media::VideoCaptureParams) 19 IPC_STRUCT_TRAITS_MEMBER(requested_format) 20 IPC_STRUCT_TRAITS_MEMBER(allow_resolution_change) 21 IPC_STRUCT_TRAITS_END() 22 23 // TODO(nick): device_id in these messages is basically just a route_id. We 24 // should shift to IPC_MESSAGE_ROUTED and use MessageRouter in the filter impls. 25 26 // Notify the renderer process about the state update such as 27 // Start/Pause/Stop. 28 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_StateChanged, 29 int /* device id */, 30 content::VideoCaptureState /* new state */) 31 32 // Tell the renderer process that a new buffer is allocated for video capture. 33 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_NewBuffer, 34 int /* device id */, 35 base::SharedMemoryHandle /* handle */, 36 int /* length */, 37 int /* buffer_id */) 38 39 // Tell the renderer process that it should release a buffer previously 40 // allocated by VideoCaptureMsg_NewBuffer. 41 IPC_MESSAGE_CONTROL2(VideoCaptureMsg_FreeBuffer, 42 int /* device id */, 43 int /* buffer_id */) 44 45 // Tell the renderer process that a buffer is available from video capture. 46 IPC_MESSAGE_CONTROL4(VideoCaptureMsg_BufferReady, 47 int /* device id */, 48 int /* buffer_id */, 49 base::Time /* timestamp */, 50 media::VideoCaptureFormat /* resolution */) 51 52 // Start a video capture as |device_id|, a new id picked by the renderer 53 // process. The session to be started is determined by |params.session_id|. 54 IPC_MESSAGE_CONTROL3(VideoCaptureHostMsg_Start, 55 int /* device_id */, 56 media::VideoCaptureSessionId, /* session_id */ 57 media::VideoCaptureParams /* params */) 58 59 // Pause the video capture specified by |device_id|. 60 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Pause, 61 int /* device_id */) 62 63 // Close the video capture specified by |device_id|. 64 IPC_MESSAGE_CONTROL1(VideoCaptureHostMsg_Stop, 65 int /* device_id */) 66 67 // Tell the browser process that the renderer has finished reading from 68 // a buffer previously delivered by VideoCaptureMsg_BufferReady. 69 IPC_MESSAGE_CONTROL2(VideoCaptureHostMsg_BufferReady, 70 int /* device_id */, 71 int /* buffer_id */) 72