Chromecast: adds a media pipeline feeding data to CMA device backends.

chromecast/media/cma/pipeline/media_pipeline.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_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_H_
+#define CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_H_
+
+#include "base/basictypes.h"
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "media/base/pipeline_status.h"
+
+namespace media {
+class AudioDecoderConfig;
+class BrowserCdm;
+class VideoDecoderConfig;
+}
+
+namespace chromecast {
+namespace media {
+class AudioPipeline;
+class CodedFrameProvider;
+struct MediaPipelineClient;
+class VideoPipeline;
+
+class MediaPipeline {
+ public:
+  MediaPipeline() {}
+  virtual ~MediaPipeline() {}
+
+  // Set the media pipeline client.
+  virtual void SetClient(const MediaPipelineClient& client) = 0;
+
+  // Set the CDM to use for decryption.
+  // The CDM is refered by its id.
+  virtual void SetCdm(int cdm_id) = 0;
+
+  // Return the audio/video pipeline owned by the MediaPipeline.
+  virtual AudioPipeline* GetAudioPipeline() const = 0;
+  virtual VideoPipeline* GetVideoPipeline() const = 0;
+
+  // Create an audio/video pipeline.
+  // MediaPipeline owns the resulting audio/video pipeline.
+  // Only one audio and one video pipeline can be created.
+  virtual void InitializeAudio(
+      const ::media::AudioDecoderConfig& config,
+      scoped_ptr<CodedFrameProvider> frame_provider,
+      const ::media::PipelineStatusCB& status_cb) = 0;
+  virtual void InitializeVideo(
+      const ::media::VideoDecoderConfig& config,
+      scoped_ptr<CodedFrameProvider> frame_provider,
+      const ::media::PipelineStatusCB& status_cb) = 0;
+
+  // Control the media pipeline state machine.
+  virtual void StartPlayingFrom(base::TimeDelta time) = 0;
+  virtual void Flush(const ::media::PipelineStatusCB& status_cb) = 0;
+  virtual void Stop() = 0;
+
+  // Set the playback rate.
+  virtual void SetPlaybackRate(float playback_rate) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaPipeline);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_CMA_PIPELINE_MEDIA_PIPELINE_H_