Added stub MediaSourcePlayer for developing behind the flag

media/base/android/media_source_player.h

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Copyright 2015 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 MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 
-#include <jni.h>
-#include <map>
-#include <string>
-#include <vector>
-
 #include "base/android/scoped_java_ref.h"
-#include "base/callback.h"
-#include "base/cancelable_callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
-#include "base/time/default_tick_clock.h"
-#include "base/time/time.h"
 #include "media/base/android/demuxer_android.h"
-#include "media/base/android/media_codec_bridge.h"
-#include "media/base/android/media_decoder_job.h"
-#include "media/base/android/media_drm_bridge.h"
 #include "media/base/android/media_player_android.h"
 #include "media/base/media_export.h"
-#include "media/base/time_delta_interpolator.h"
 
 namespace media {
 
-class AudioDecoderJob;
-class VideoDecoderJob;
+class MediaSourcePlayerImpl;
 
-// This class handles media source extensions on Android. It uses Android
-// MediaCodec to decode audio and video streams in two separate threads.
-class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid,
-                                       public DemuxerAndroidClient {
+// Returns the task runner for the media thread
+scoped_refptr<base::SingleThreadTaskRunner> GetMediaTaskRunner();
+
+// This class handles media source extensions on Android.
+class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid {
  public:
   // Constructs a player with the given ID and demuxer. |manager| must outlive
   // the lifetime of this object.
   MediaSourcePlayer(int player_id,
                     MediaPlayerManager* manager,
                     const RequestMediaResourcesCB& request_media_resources_cb,
                     scoped_ptr<DemuxerAndroid> demuxer,
                     const GURL& frame_url);
   ~MediaSourcePlayer() override;
 
   // MediaPlayerAndroid implementation.
   void SetVideoSurface(gfx::ScopedJavaSurface surface) override;
   void Start() override;
   void Pause(bool is_media_related_action) override;
   void SeekTo(base::TimeDelta timestamp) override;
   void Release() override;
   void SetVolume(double volume) override;
   int GetVideoWidth() override;
   int GetVideoHeight() override;
   base::TimeDelta GetCurrentTime() override;
   base::TimeDelta GetDuration() override;
   bool IsPlaying() override;
   bool CanPause() override;
   bool CanSeekForward() override;
   bool CanSeekBackward() override;
   bool IsPlayerReady() override;
   void SetCdm(BrowserCdm* cdm) override;
 
-  // DemuxerAndroidClient implementation.
-  void OnDemuxerConfigsAvailable(const DemuxerConfigs& params) override;
-  void OnDemuxerDataAvailable(const DemuxerData& params) override;
-  void OnDemuxerSeekDone(base::TimeDelta actual_browser_seek_time) override;
-  void OnDemuxerDurationChanged(base::TimeDelta duration) override;
 
  private:
-  friend class MediaSourcePlayerTest;
+  MediaSourcePlayerImpl* impl_;
 
-  // Update the current timestamp.
-  void UpdateTimestamps(base::TimeDelta current_presentation_timestamp,
-                        base::TimeDelta max_presentation_timestamp);
-
-  // Helper function for starting media playback.
-  void StartInternal();
-
-  // Playback is completed for one channel.
-  void PlaybackCompleted(bool is_audio);
-
-  // Called when the decoder finishes its task.
-  void MediaDecoderCallback(
-        bool is_audio, MediaCodecStatus status,
-        base::TimeDelta current_presentation_timestamp,
-        base::TimeDelta max_presentation_timestamp);
-
-  bool IsPrerollFinished(bool is_audio) const;
-
-  // Gets MediaCrypto object from |drm_bridge_|.
-  base::android::ScopedJavaLocalRef<jobject> GetMediaCrypto();
-
-  // Callback to notify that MediaCrypto is ready in |drm_bridge_|.
-  void OnMediaCryptoReady();
-
-  // Handle pending events if all the decoder jobs are not currently decoding.
-  void ProcessPendingEvents();
-
-  // Flush the decoders and clean up all the data needs to be decoded.
-  void ClearDecodingData();
-
-  // Called to decode more data.
-  void DecodeMoreAudio();
-  void DecodeMoreVideo();
-
-  // Functions check whether audio/video is present.
-  bool HasVideo() const;
-  bool HasAudio() const;
-
-  // Functions that check whether audio/video stream has reached end of output
-  // or are not present in player configuration.
-  bool AudioFinished();
-  bool VideoFinished();
-
-  // Determine seekability based on duration.
-  bool Seekable();
-
-  // Called when the |decoder_starvation_callback_| times out.
-  void OnDecoderStarved();
-
-  // Starts the |decoder_starvation_callback_| task with the timeout value.
-  // |current_presentation_timestamp| - The presentation timestamp used for
-  // starvation timeout computations. It represents the current timestamp of
-  // rendered data.
-  // |max_presentation_timestamp| - The presentation timestamp if all the
-  // decoded data are rendered.
-  void StartStarvationCallback(
-      base::TimeDelta current_presentation_timestamp,
-      base::TimeDelta max_presentation_timestamp);
-
-  // Schedules a seek event in |pending_events_| and calls StopDecode() on all
-  // the MediaDecoderJobs. Sets clock to |seek_time|, and resets
-  // |pending_seek_|. There must not already be a seek event in
-  // |pending_events_|.
-  void ScheduleSeekEventAndStopDecoding(base::TimeDelta seek_time);
-
-  // Schedules a browser seek event. We must not currently be processing any
-  // seek. Note that there is possibility that browser seek of renderer demuxer
-  // may unexpectedly stall due to lack of buffered data at or after the browser
-  // seek time.
-  // TODO(wolenetz): Instead of doing hack browser seek, replay cached data
-  // since last keyframe. See http://crbug.com/304234.
-  void BrowserSeekToCurrentTime();
-
-  // Called when a MediaDecoderJob finishes prefetching data. Once all
-  // MediaDecoderJobs have prefetched data, then this method updates
-  // |start_time_ticks_| and |start_presentation_timestamp_| so that video can
-  // resync with audio and starts decoding.
-  void OnPrefetchDone();
-
-  // Called when the demuxer config changes.
-  void OnDemuxerConfigsChanged();
-
-  // Called when new decryption key becomes available.
-  void OnKeyAdded();
-
-  // Called to resume playback after NO_KEY is received, but a new key is
-  // available.
-  void ResumePlaybackAfterKeyAdded();
-
-  // Called when the CDM is detached.
-  void OnCdmUnset();
-
-  // Test-only method to setup hook for the completion of the next decode cycle.
-  // This callback state is cleared when it is next run.
-  // Prevent usage creep by only calling this from the
-  // ReleaseWithOnPrefetchDoneAlreadyPosted MediaSourcePlayerTest.
-  void set_decode_callback_for_testing(const base::Closure& test_decode_cb) {
-    decode_callback_for_testing_ = test_decode_cb;
-  }
-
-  // Please keep this in sync with |kPendingEventNames| in GetEventName().
-  enum PendingEventFlags {
-    NO_EVENT_PENDING = 0,
-    PREFETCH_DONE_EVENT_PENDING = 1 << 0,
-    SEEK_EVENT_PENDING = 1 << 1,
-    DECODER_CREATION_EVENT_PENDING = 1 << 2,
-    PREFETCH_REQUEST_EVENT_PENDING = 1 << 3,
-  };
-
-  static const char* GetEventName(PendingEventFlags event);
-  bool IsEventPending(PendingEventFlags event) const;
-  void SetPendingEvent(PendingEventFlags event);
-  void ClearPendingEvent(PendingEventFlags event);
-
-  // If the player is previously waiting for audio or video decoder job, retry
-  // creating the decoders identified by |audio| and |video|.
-  void RetryDecoderCreation(bool audio, bool video);
-
-  scoped_ptr<DemuxerAndroid> demuxer_;
-
-  // Pending event that the player needs to do.
-  unsigned pending_event_;
-
-  // Stats about the media.
-  base::TimeDelta duration_;
-  bool playing_;
-
-  // base::TickClock used by |interpolator_|.
-  base::DefaultTickClock default_tick_clock_;
-
-  // Tracks the most recent media time update and provides interpolated values
-  // as playback progresses.
-  TimeDeltaInterpolator interpolator_;
-
-  // Timestamps for providing simple A/V sync. When start decoding an audio
-  // chunk, we record its presentation timestamp and the current system time.
-  // Then we use this information to estimate when the next audio/video frame
-  // should be rendered.
-  // TODO(qinmin): Need to fix the problem if audio/video lagged too far behind
-  // due to network or decoding problem.
-  base::TimeTicks start_time_ticks_;
-  base::TimeDelta start_presentation_timestamp_;
-
-  // Flag that is true if doing a hack browser seek or false if doing a
-  // regular seek. Only valid when |SEEK_EVENT_PENDING| is pending.
-  // TODO(wolenetz): Instead of doing hack browser seek, replay cached data
-  // since last keyframe. See http://crbug.com/304234.
-  bool doing_browser_seek_;
-
-  // If already doing a browser seek when a regular seek request arrives,
-  // these fields remember the regular seek so OnDemuxerSeekDone() can trigger
-  // it when the browser seek is done. These are only valid when
-  // |SEEK_EVENT_PENDING| is pending.
-  bool pending_seek_;
-  base::TimeDelta pending_seek_time_;
-
-  // Decoder jobs.
-  scoped_ptr<AudioDecoderJob, MediaDecoderJob::Deleter> audio_decoder_job_;
-  scoped_ptr<VideoDecoderJob, MediaDecoderJob::Deleter> video_decoder_job_;
-
-  // Track the most recent preroll target. Decoder re-creation needs this to
-  // resume any in-progress preroll.
-  base::TimeDelta preroll_timestamp_;
-
-  // A cancelable task that is posted when the audio decoder starts requesting
-  // new data. This callback runs if no data arrives before the timeout period
-  // elapses.
-  base::CancelableClosure decoder_starvation_callback_;
-
-  MediaDrmBridge* drm_bridge_;
-  int cdm_registration_id_;
-
-  // No decryption key available to decrypt the encrypted buffer. In this case,
-  // the player should pause. When a new key is added (OnKeyAdded()), we should
-  // try to start playback again.
-  bool is_waiting_for_key_;
-
-  // Indicates the situation where new key is added during pending decode
-  // (this variable can only be set when *_decoder_job_->is_decoding()). If this
-  // variable is true and MEDIA_CODEC_NO_KEY is returned then we need to try
-  // decoding again in case the newly added key is the correct decryption key.
-  bool key_added_while_decode_pending_;
-
-  // Indicates whether the player is waiting for audio or video decoder to be
-  // created. This could happen if video surface is not available or key is
-  // not added.
-  bool is_waiting_for_audio_decoder_;
-  bool is_waiting_for_video_decoder_;
-
-  // Test-only callback for hooking the completion of the next decode cycle.
-  base::Closure decode_callback_for_testing_;
-
-  // Whether audio or video decoder is in the process of prerolling.
-  bool prerolling_;
-
-  // Weak pointer passed to media decoder jobs for callbacks.
-  base::WeakPtr<MediaSourcePlayer> weak_this_;
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<MediaSourcePlayer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaSourcePlayer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_