1/*
2 * libjingle
3 * Copyright 2012, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef TALK_APP_WEBRTC_VIDEOTRACKRENDERERS_H_
29#define TALK_APP_WEBRTC_VIDEOTRACKRENDERERS_H_
30
31#include <vector>
32
33#include "talk/app/webrtc/mediastreaminterface.h"
34#include "talk/media/base/videorenderer.h"
35#include "webrtc/base/criticalsection.h"
36
37namespace webrtc {
38
39// Class used for rendering cricket::VideoFrames to multiple renderers of type
40// VideoRendererInterface.
41// Each VideoTrack owns a VideoTrackRenderers instance.
42// The class is thread safe. Rendering to the added VideoRendererInterfaces is
43// done on the same thread as the cricket::VideoRenderer.
44class VideoTrackRenderers : public cricket::VideoRenderer {
45 public:
46  VideoTrackRenderers();
47  ~VideoTrackRenderers();
48
49  // Implements cricket::VideoRenderer
50  virtual bool SetSize(int width, int height, int reserved);
51  virtual bool RenderFrame(const cricket::VideoFrame* frame);
52
53  void AddRenderer(VideoRendererInterface* renderer);
54  void RemoveRenderer(VideoRendererInterface* renderer);
55  void SetEnabled(bool enable);
56
57 private:
58  struct RenderObserver {
59    explicit RenderObserver(VideoRendererInterface* renderer)
60        : renderer_(renderer),
61          size_set_(false) {
62    }
63    VideoRendererInterface* renderer_;
64    bool size_set_;
65  };
66
67  int width_;
68  int height_;
69  bool enabled_;
70  std::vector<RenderObserver> renderers_;
71
72  rtc::CriticalSection critical_section_;  // Protects the above variables
73};
74
75}  // namespace webrtc
76
77#endif  // TALK_APP_WEBRTC_VIDEOTRACKRENDERERS_H_
78