[Chromecast] Add IPC code on brower process side

chromecast/browser/media/media_pipeline_host.h

+// 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_MEDIA_PIPELINE_HOST_H_
+#define CHROMECAST_BROWSER_MEDIA_MEDIA_PIPELINE_HOST_H_
+
+#include <map>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/threading/thread_checker.h"
+#include "base/time/time.h"
+#include "chromecast/common/media/cma_ipc_common.h"
+#include "chromecast/media/cma/pipeline/load_type.h"
+#include "media/base/pipeline_status.h"
+
+namespace base {
+class SharedMemory;
+class SingleThreadTaskRunner;
+}
+
+namespace media {
+class AudioDecoderConfig;
+class VideoDecoderConfig;
+}
+
+namespace chromecast {
+namespace media {
+struct AvPipelineClient;
+struct MediaPipelineClient;
+class MediaPipelineImpl;
+struct VideoPipelineClient;
+
+class MediaPipelineHost {
+ public:
+  MediaPipelineHost();
+  ~MediaPipelineHost();
+
+  void Initialize(LoadType load_type,
+                  const MediaPipelineClient& client);
+
+  void SetAvPipe(TrackId track_id,
+                 scoped_ptr<base::SharedMemory> shared_mem,
+                 const base::Closure& pipe_read_activity_cb,
+                 const base::Closure& av_pipe_set_cb);
+  void AudioInitialize(TrackId track_id,
+                       const AvPipelineClient& client,
+                       const ::media::AudioDecoderConfig& config,
+                       const ::media::PipelineStatusCB& status_cb);
+  void VideoInitialize(TrackId track_id,
+                       const VideoPipelineClient& client,
+                       const ::media::VideoDecoderConfig& config,
+                       const ::media::PipelineStatusCB& status_cb);
+  void StartPlayingFrom(base::TimeDelta time);
+  void Flush(const ::media::PipelineStatusCB& status_cb);
+  void Stop();
+
+  void SetPlaybackRate(float playback_rate);
+  void SetVolume(TrackId track_id, float playback_rate);
+  void SetCdm(int render_process_id, int render_frame_id, int cdm_id);
+
+  void NotifyPipeWrite(TrackId track_id);
+
+ private:
+  base::ThreadChecker thread_checker_;
+
+  scoped_ptr<MediaPipelineImpl> media_pipeline_;
+
+  // The shared memory for a track id must be valid until Stop is invoked on
+  // that track id.
+  struct MediaTrackHost;
+  typedef std::map<TrackId, MediaTrackHost*> MediaTrackMap;
+  MediaTrackMap media_track_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPipelineHost);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_BROWSER_MEDIA_MEDIA_PIPELINE_HOST_H_
+