[Chromecast] Add IPC code on brower process side

chromecast/browser/media/cma_message_filter_host.h

Index: chromecast/browser/media/cma_message_filter_host.h
diff --git a/chromecast/browser/media/cma_message_filter_host.h b/chromecast/browser/media/cma_message_filter_host.h
new file mode 100644
index 0000000000000000000000000000000000000000..763727c5888227aedaa755d59ecf52b4a7bf465f
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+++ b/chromecast/browser/media/cma_message_filter_host.h
@@ -0,0 +1,126 @@
+// Copyright 2014 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.
+
+#ifndef CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_
+#define CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_
+
+#include <map>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/shared_memory.h"
+#include "base/memory/weak_ptr.h"
+#include "chromecast/common/media/cma_ipc_common.h"
+#include "chromecast/media/cma/pipeline/load_type.h"
+#include "content/public/browser/browser_message_filter.h"
+#include "content/public/browser/browser_thread.h"
+#include "media/base/buffering_state.h"
+#include "media/base/pipeline_status.h"
+
+namespace base {
+class CancelableSyncSocket;
+class SingleThreadTaskRunner;
+}
+
+namespace gfx {
+class PointF;
+class Size;
+}
+
+namespace media {
+class AudioDecoderConfig;
+class BrowserCdm;
+class VideoDecoderConfig;
+}
+
+namespace chromecast {
+namespace media {
+
+class MediaPipelineHost;
+
+class CmaMessageFilterHost
+    : public content::BrowserMessageFilter {
+ public:
+  explicit CmaMessageFilterHost(int render_process_id);
+
+  // content::BrowserMessageFilter implementation.
+  void OnChannelClosing() override;
+  void OnDestruct() const override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+
+ private:
+  typedef std::map<int, MediaPipelineHost*> MediaPipelineMap;
+
+  friend class content::BrowserThread;
+  friend class base::DeleteHelper<CmaMessageFilterHost>;
+  ~CmaMessageFilterHost() override;
+
+  void DeleteEntries();
+  MediaPipelineHost* LookupById(int media_id);
+
+  // Handling of incoming IPC messages.
+  void CreateMedia(int media_id, LoadType load_type);
+  void DestroyMedia(int media_id);
+  void SetCdm(int media_id, int render_frame_id, int cdm_id);
+  void CreateAvPipe(int media_id, TrackId track_id, size_t shared_mem_size);
+  void OnAvPipeSet(int media_id,
+                   TrackId track_id,
+                   base::SharedMemoryHandle foreign_memory_handle,
+                   scoped_ptr<base::CancelableSyncSocket> foreign_socket);
+  void AudioInitialize(int media_id,
+                       TrackId track_id,
+                       const ::media::AudioDecoderConfig& config);
+  void VideoInitialize(int media_id,
+                       TrackId track_id,
+                       const ::media::VideoDecoderConfig& config);
+  void StartPlayingFrom(int media_id, base::TimeDelta time);
+  void Flush(int media_id);
+  void Stop(int media_id);
+  void SetPlaybackRate(int media_id, float playback_rate);
+  void SetVolume(int media_id, TrackId track_id, float volume);
+  void NotifyPipeWrite(int media_id, TrackId track_id);
+  void NotifyExternalSurface(int surface_id,
+                             const gfx::PointF& p0, const gfx::PointF& p1,
+                             const gfx::PointF& p2, const gfx::PointF& p3);
+
+  // Audio/Video callbacks.
+  void OnMediaStateChanged(int media_id,
+                           ::media::PipelineStatus status);
+  void OnTrackStateChanged(int media_id,
+                           TrackId track_id,
+                           ::media::PipelineStatus status);
+  void OnPipeReadActivity(int media_id, TrackId track_id);
+  void OnTimeUpdate(int media_id,
+                    base::TimeDelta media_time,
+                    base::TimeDelta max_media_time,
+                    base::TimeTicks stc);
+  void OnBufferingNotification(int media_id, ::media::BufferingState state);
+  void OnEos(int media_id, TrackId track_id);
+  void OnPlaybackError(int media_id, TrackId track_id,
+                       ::media::PipelineStatus status);
+  void OnStatisticsUpdated(int media_id,
+                           TrackId track_id,
+                           const ::media::PipelineStatistics& stats);
+  void OnNaturalSizeChanged(int media_id,
+                            TrackId track_id,
+                            const gfx::Size& size);
+
+  // Render process ID correponding to this message filter.
+  const int process_id_;
+
+  // List of media pipeline and message loop media pipelines are running on.
+  MediaPipelineMap media_pipelines_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  base::WeakPtr<CmaMessageFilterHost> weak_this_;
+  base::WeakPtrFactory<CmaMessageFilterHost> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(CmaMessageFilterHost);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_BROWSER_MEDIA_CMA_MESSAGE_FILTER_HOST_H_
+