src/remoting/client/plugin/media_source_video_renderer.h

   1 // Copyright 2014 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 #ifndef REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_
   6 #define REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "remoting/client/chromoting_stats.h"
  14 #include "remoting/client/video_renderer.h"
  15 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
  16 #include "third_party/webrtc/modules/desktop_capture/desktop_region.h"
  17
  18 namespace remoting {
  19
  20 // VideoRenderer implementation that packs data into a WebM stream that can be
  21 // passed to <video> tag using MediaSource API.
  22 class MediaSourceVideoRenderer : public VideoRenderer {
  23  public:
  24   class Delegate {
  25    public:
  26     Delegate() {}
  27     virtual ~Delegate() {}
  28
  29     // Called when stream size changes.
  30     virtual void OnMediaSourceSize(const webrtc::DesktopSize& size,
  31                                    const webrtc::DesktopVector& dpi) = 0;
  32
  33     // Called when desktop shape changes.
  34     virtual void OnMediaSourceShape(const webrtc::DesktopRegion& shape) = 0;
  35
  36     // Called when the MediaSource needs to be reset (e.g. because screen size
  37     // has changed).
  38     virtual void OnMediaSourceReset(const std::string& format) = 0;
  39
  40     // Called when new data becomes available.
  41     virtual void OnMediaSourceData(uint8_t* buffer, size_t buffer_size,
  42                                    bool keyframe) = 0;
  43   };
  44
  45   explicit MediaSourceVideoRenderer(Delegate* delegate);
  46   ~MediaSourceVideoRenderer() override;
  47
  48   // VideoRenderer interface.
  49   void Initialize(const protocol::SessionConfig& config) override;
  50   ChromotingStats* GetStats() override;
  51   void ProcessVideoPacket(scoped_ptr<VideoPacket> packet,
  52                           const base::Closure& done) override;
  53
  54  private:
  55   // Helper class used to generate WebM stream.
  56   class VideoWriter;
  57
  58   Delegate* delegate_;
  59
  60   std::string format_string_;
  61   const char* codec_id_;
  62
  63   scoped_ptr<VideoWriter> writer_;
  64   webrtc::DesktopVector frame_dpi_;
  65   webrtc::DesktopRegion desktop_shape_;
  66
  67   ChromotingStats stats_;
  68   int64 latest_sequence_number_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(MediaSourceVideoRenderer);
  71 };
  72
  73 }  // namespace remoting
  74
  75 #endif  // REMOTING_CLIENT_PLUGIN_MEDIA_SOURCE_VIDEO_RENDERER_H_