| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| // VideoCaptureHost serves video capture related messages from |
| // VideoCaptureMessageFilter which lives inside the render process. |
| // |
| // This class is owned by RenderProcessHostImpl, and instantiated on UI |
| // thread, but all other operations and method calls happen on IO thread. |
| // |
| // Here's an example of a typical IPC dialog for video capture: |
| // |
| // Renderer VideoCaptureHost |
| // | | |
| // | VideoCaptureHostMsg_Start > | |
| // | < VideoCaptureMsg_StateChanged | |
| // | (VIDEO_CAPTURE_STATE_STARTED) | |
| // | < VideoCaptureMsg_NewBuffer(1) | |
| // | < VideoCaptureMsg_NewBuffer(2) | |
| // | < VideoCaptureMsg_NewBuffer(3) | |
| // | | |
| // | < VideoCaptureMsg_BufferReady(1) | |
| // | < VideoCaptureMsg_BufferReady(2) | |
| // | VideoCaptureHostMsg_BufferReady(1) > | |
| // | < VideoCaptureMsg_BufferReady(3) | |
| // | VideoCaptureHostMsg_BufferReady(2) > | |
| // | < VideoCaptureMsg_BufferReady(1) | |
| // | VideoCaptureHostMsg_BufferReady(3) > | |
| // | < VideoCaptureMsg_BufferReady(2) | |
| // | VideoCaptureHostMsg_BufferReady(1) > | |
| // | ... | |
| // | < VideoCaptureMsg_BufferReady(3) | |
| // | | |
| // | ... (resolution change) | |
| // | < VideoCaptureMsg_FreeBuffer(1) | Buffers are re-allocated |
| // | < VideoCaptureMsg_NewBuffer(4) | at a larger size, as |
| // | < VideoCaptureMsg_BufferReady(4) | needed. |
| // | VideoCaptureHostMsg_BufferReady(2) > | |
| // | < VideoCaptureMsg_FreeBuffer(2) | |
| // | < VideoCaptureMsg_NewBuffer(5) | |
| // | < VideoCaptureMsg_BufferReady(5) | |
| // | ... | |
| // | | |
| // | < VideoCaptureMsg_BufferReady | |
| // | VideoCaptureHostMsg_Stop > | |
| // | VideoCaptureHostMsg_BufferReady > | |
| // | < VideoCaptureMsg_StateChanged | |
| // | (VIDEO_CAPTURE_STATE_STOPPED) | |
| // v v |
| |
| #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_ |
| |
| #include <map> |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/sequenced_task_runner_helpers.h" |
| #include "content/browser/renderer_host/media/video_capture_controller.h" |
| #include "content/common/content_export.h" |
| #include "content/public/browser/browser_message_filter.h" |
| #include "ipc/ipc_message.h" |
| |
| namespace content { |
| class MediaStreamManager; |
| |
| class CONTENT_EXPORT VideoCaptureHost |
| : public BrowserMessageFilter, |
| public VideoCaptureControllerEventHandler { |
| public: |
| explicit VideoCaptureHost(MediaStreamManager* media_stream_manager); |
| |
| // BrowserMessageFilter implementation. |
| void OnChannelClosing() override; |
| void OnDestruct() const override; |
| bool OnMessageReceived(const IPC::Message& message) override; |
| |
| // VideoCaptureControllerEventHandler implementation. |
| void OnError(const VideoCaptureControllerID& id) override; |
| void OnBufferCreated(const VideoCaptureControllerID& id, |
| base::SharedMemoryHandle handle, |
| int length, |
| int buffer_id) override; |
| void OnBufferDestroyed(const VideoCaptureControllerID& id, |
| int buffer_id) override; |
| void OnBufferReady(const VideoCaptureControllerID& id, |
| int buffer_id, |
| const media::VideoCaptureFormat& format, |
| const gfx::Rect& visible_rect, |
| base::TimeTicks timestamp) override; |
| void OnMailboxBufferReady(const VideoCaptureControllerID& id, |
| int buffer_id, |
| const gpu::MailboxHolder& mailbox_holder, |
| const media::VideoCaptureFormat& format, |
| base::TimeTicks timestamp) override; |
| void OnEnded(const VideoCaptureControllerID& id) override; |
| |
| private: |
| friend class BrowserThread; |
| friend class base::DeleteHelper<VideoCaptureHost>; |
| friend class MockVideoCaptureHost; |
| friend class VideoCaptureHostTest; |
| |
| ~VideoCaptureHost() override; |
| |
| // IPC message: Start capture on the VideoCaptureDevice referenced by |
| // |session_id|. |device_id| is an id created by VideoCaptureMessageFilter |
| // to identify a session between a VideoCaptureMessageFilter and a |
| // VideoCaptureHost. |
| void OnStartCapture(int device_id, |
| media::VideoCaptureSessionId session_id, |
| const media::VideoCaptureParams& params); |
| void OnControllerAdded( |
| int device_id, |
| const base::WeakPtr<VideoCaptureController>& controller); |
| void DoControllerAddedOnIOThread( |
| int device_id, |
| const base::WeakPtr<VideoCaptureController>& controller); |
| |
| // IPC message: Stop capture on device referenced by |device_id|. |
| void OnStopCapture(int device_id); |
| |
| // IPC message: Pause capture on device referenced by |device_id|. |
| void OnPauseCapture(int device_id); |
| |
| void OnResumeCapture(int device_id, |
| media::VideoCaptureSessionId session_id, |
| const media::VideoCaptureParams& params); |
| |
| // IPC message: Receive an empty buffer from renderer. Send it to device |
| // referenced by |device_id|. |
| void OnReceiveEmptyBuffer(int device_id, int buffer_id, uint32 sync_point); |
| |
| // IPC message: Get supported formats referenced by |capture_session_id|. |
| // |device_id| is needed for message back-routing purposes. |
| void OnGetDeviceSupportedFormats( |
| int device_id, |
| media::VideoCaptureSessionId capture_session_id); |
| |
| // IPC message: Get a device's currently in use format(s), referenced by |
| // |capture_session_id|. |device_id| is needed for message back-routing |
| // purposes. |
| void OnGetDeviceFormatsInUse( |
| int device_id, |
| media::VideoCaptureSessionId capture_session_id); |
| |
| // Sends a newly created buffer to the VideoCaptureMessageFilter. |
| void DoSendNewBufferOnIOThread( |
| const VideoCaptureControllerID& controller_id, |
| base::SharedMemoryHandle handle, |
| int length, |
| int buffer_id); |
| |
| void DoSendFreeBufferOnIOThread( |
| const VideoCaptureControllerID& controller_id, |
| int buffer_id); |
| |
| // Sends a filled buffer to the VideoCaptureMessageFilter. |
| void DoSendFilledBufferOnIOThread( |
| const VideoCaptureControllerID& controller_id, |
| int buffer_id, |
| const media::VideoCaptureFormat& format, |
| const gfx::Rect& visible_rect, |
| base::TimeTicks timestamp); |
| |
| // Sends a filled texture mailbox buffer to the VideoCaptureMessageFilter. |
| void DoSendFilledMailboxBufferOnIOThread( |
| const VideoCaptureControllerID& controller_id, |
| int buffer_id, |
| const gpu::MailboxHolder& mailbox_holder, |
| const media::VideoCaptureFormat& format, |
| base::TimeTicks timestamp); |
| |
| // Handles error coming from VideoCaptureDevice. |
| void DoHandleErrorOnIOThread(const VideoCaptureControllerID& controller_id); |
| |
| void DoEndedOnIOThread(const VideoCaptureControllerID& controller_id); |
| |
| // Deletes the controller and notifies the VideoCaptureManager. |on_error| is |
| // true if this is triggered by VideoCaptureControllerEventHandler::OnError. |
| void DeleteVideoCaptureControllerOnIOThread( |
| const VideoCaptureControllerID& controller_id, bool on_error); |
| |
| MediaStreamManager* media_stream_manager_; |
| |
| typedef std::map<VideoCaptureControllerID, |
| base::WeakPtr<VideoCaptureController> > EntryMap; |
| |
| // A map of VideoCaptureControllerID to the VideoCaptureController to which it |
| // is connected. An entry in this map holds a null controller while it is in |
| // the process of starting. |
| EntryMap entries_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VideoCaptureHost); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_HOST_H_ |