1 // Copyright (c) 2013 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 MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_ 6 #define MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_ 7 8 #include <jni.h> 9 #include <map> 10 #include <string> 11 #include <vector> 12 13 #include "base/android/scoped_java_ref.h" 14 #include "base/callback.h" 15 #include "base/cancelable_callback.h" 16 #include "base/memory/scoped_ptr.h" 17 #include "base/memory/weak_ptr.h" 18 #include "base/threading/thread.h" 19 #include "base/time/default_tick_clock.h" 20 #include "base/time/time.h" 21 #include "media/base/android/demuxer_android.h" 22 #include "media/base/android/media_codec_bridge.h" 23 #include "media/base/android/media_decoder_job.h" 24 #include "media/base/android/media_drm_bridge.h" 25 #include "media/base/android/media_player_android.h" 26 #include "media/base/clock.h" 27 #include "media/base/media_export.h" 28 29 namespace media { 30 31 class AudioDecoderJob; 32 class VideoDecoderJob; 33 34 // This class handles media source extensions on Android. It uses Android 35 // MediaCodec to decode audio and video streams in two separate threads. 36 class MEDIA_EXPORT MediaSourcePlayer : public MediaPlayerAndroid, 37 public DemuxerAndroidClient { 38 public: 39 // Constructs a player with the given ID and demuxer. |manager| must outlive 40 // the lifetime of this object. 41 MediaSourcePlayer(int player_id, 42 MediaPlayerManager* manager, 43 const RequestMediaResourcesCB& request_media_resources_cb, 44 const ReleaseMediaResourcesCB& release_media_resources_cb, 45 scoped_ptr<DemuxerAndroid> demuxer, 46 const GURL& frame_url); 47 virtual ~MediaSourcePlayer(); 48 49 // MediaPlayerAndroid implementation. 50 virtual void SetVideoSurface(gfx::ScopedJavaSurface surface) OVERRIDE; 51 virtual void Start() OVERRIDE; 52 virtual void Pause(bool is_media_related_action ALLOW_UNUSED) OVERRIDE; 53 virtual void SeekTo(base::TimeDelta timestamp) OVERRIDE; 54 virtual void Release() OVERRIDE; 55 virtual void SetVolume(double volume) OVERRIDE; 56 virtual int GetVideoWidth() OVERRIDE; 57 virtual int GetVideoHeight() OVERRIDE; 58 virtual base::TimeDelta GetCurrentTime() OVERRIDE; 59 virtual base::TimeDelta GetDuration() OVERRIDE; 60 virtual bool IsPlaying() OVERRIDE; 61 virtual bool CanPause() OVERRIDE; 62 virtual bool CanSeekForward() OVERRIDE; 63 virtual bool CanSeekBackward() OVERRIDE; 64 virtual bool IsPlayerReady() OVERRIDE; 65 virtual void SetCdm(BrowserCdm* cdm) OVERRIDE; 66 virtual bool IsSurfaceInUse() const OVERRIDE; 67 68 // DemuxerAndroidClient implementation. 69 virtual void OnDemuxerConfigsAvailable(const DemuxerConfigs& params) OVERRIDE; 70 virtual void OnDemuxerDataAvailable(const DemuxerData& params) OVERRIDE; 71 virtual void OnDemuxerSeekDone( 72 base::TimeDelta actual_browser_seek_time) OVERRIDE; 73 virtual void OnDemuxerDurationChanged(base::TimeDelta duration) OVERRIDE; 74 75 private: 76 friend class MediaSourcePlayerTest; 77 78 // Update the current timestamp. 79 void UpdateTimestamps(base::TimeDelta current_presentation_timestamp, 80 base::TimeDelta max_presentation_timestamp); 81 82 // Helper function for starting media playback. 83 void StartInternal(); 84 85 // Playback is completed for one channel. 86 void PlaybackCompleted(bool is_audio); 87 88 // Called when the decoder finishes its task. 89 void MediaDecoderCallback( 90 bool is_audio, MediaCodecStatus status, 91 base::TimeDelta current_presentation_timestamp, 92 base::TimeDelta max_presentation_timestamp); 93 94 // Gets MediaCrypto object from |drm_bridge_|. 95 base::android::ScopedJavaLocalRef<jobject> GetMediaCrypto(); 96 97 // Callback to notify that MediaCrypto is ready in |drm_bridge_|. 98 void OnMediaCryptoReady(); 99 100 // Handle pending events if all the decoder jobs are not currently decoding. 101 void ProcessPendingEvents(); 102 103 // Flush the decoders and clean up all the data needs to be decoded. 104 void ClearDecodingData(); 105 106 // Called to decode more data. 107 void DecodeMoreAudio(); 108 void DecodeMoreVideo(); 109 110 // Functions check whether audio/video is present. 111 bool HasVideo(); 112 bool HasAudio(); 113 114 // Functions that check whether audio/video stream has reached end of output 115 // or are not present in player configuration. 116 bool AudioFinished(); 117 bool VideoFinished(); 118 119 // Determine seekability based on duration. 120 bool Seekable(); 121 122 // Called when the |decoder_starvation_callback_| times out. 123 void OnDecoderStarved(); 124 125 // Starts the |decoder_starvation_callback_| task with the timeout value. 126 // |current_presentation_timestamp| - The presentation timestamp used for 127 // starvation timeout computations. It represents the current timestamp of 128 // rendered data. 129 // |max_presentation_timestamp| - The presentation timestamp if all the 130 // decoded data are rendered. 131 void StartStarvationCallback( 132 base::TimeDelta current_presentation_timestamp, 133 base::TimeDelta max_presentation_timestamp); 134 135 // Schedules a seek event in |pending_events_| and calls StopDecode() on all 136 // the MediaDecoderJobs. Sets clock to |seek_time|, and resets 137 // |pending_seek_|. There must not already be a seek event in 138 // |pending_events_|. 139 void ScheduleSeekEventAndStopDecoding(base::TimeDelta seek_time); 140 141 // Schedules a browser seek event. We must not currently be processing any 142 // seek. Note that there is possibility that browser seek of renderer demuxer 143 // may unexpectedly stall due to lack of buffered data at or after the browser 144 // seek time. 145 // TODO(wolenetz): Instead of doing hack browser seek, replay cached data 146 // since last keyframe. See http://crbug.com/304234. 147 void BrowserSeekToCurrentTime(); 148 149 // Helper function to determine whether a protected surface is needed for 150 // video playback. 151 bool IsProtectedSurfaceRequired(); 152 153 // Called when a MediaDecoderJob finishes prefetching data. Once all 154 // MediaDecoderJobs have prefetched data, then this method updates 155 // |start_time_ticks_| and |start_presentation_timestamp_| so that video can 156 // resync with audio and starts decoding. 157 void OnPrefetchDone(); 158 159 // Called when the demuxer config changes. 160 void OnDemuxerConfigsChanged(); 161 162 // Called when new decryption key becomes available. 163 void OnKeyAdded(); 164 165 // Called when the CDM is detached. 166 void OnCdmUnset(); 167 168 // Test-only method to setup hook for the completion of the next decode cycle. 169 // This callback state is cleared when it is next run. 170 // Prevent usage creep by only calling this from the 171 // ReleaseWithOnPrefetchDoneAlreadyPosted MediaSourcePlayerTest. 172 void set_decode_callback_for_testing(const base::Closure& test_decode_cb) { 173 decode_callback_for_testing_ = test_decode_cb; 174 } 175 176 // Please keep this in sync with |kPendingEventNames| in GetEventName(). 177 enum PendingEventFlags { 178 NO_EVENT_PENDING = 0, 179 PREFETCH_DONE_EVENT_PENDING = 1 << 0, 180 SEEK_EVENT_PENDING = 1 << 1, 181 DECODER_CREATION_EVENT_PENDING = 1 << 2, 182 PREFETCH_REQUEST_EVENT_PENDING = 1 << 3, 183 }; 184 185 static const char* GetEventName(PendingEventFlags event); 186 bool IsEventPending(PendingEventFlags event) const; 187 void SetPendingEvent(PendingEventFlags event); 188 void ClearPendingEvent(PendingEventFlags event); 189 190 // If the player is previously waiting for audio or video decoder job, retry 191 // creating the decoders identified by |audio| and |video|. 192 void RetryDecoderCreation(bool audio, bool video); 193 194 scoped_ptr<DemuxerAndroid> demuxer_; 195 196 // Pending event that the player needs to do. 197 unsigned pending_event_; 198 199 // Stats about the media. 200 base::TimeDelta duration_; 201 bool playing_; 202 203 // base::TickClock used by |clock_|. 204 base::DefaultTickClock default_tick_clock_; 205 206 // Reference clock. Keeps track of current playback time. 207 Clock clock_; 208 209 // Timestamps for providing simple A/V sync. When start decoding an audio 210 // chunk, we record its presentation timestamp and the current system time. 211 // Then we use this information to estimate when the next audio/video frame 212 // should be rendered. 213 // TODO(qinmin): Need to fix the problem if audio/video lagged too far behind 214 // due to network or decoding problem. 215 base::TimeTicks start_time_ticks_; 216 base::TimeDelta start_presentation_timestamp_; 217 218 // Flag that is true if doing a hack browser seek or false if doing a 219 // regular seek. Only valid when |SEEK_EVENT_PENDING| is pending. 220 // TODO(wolenetz): Instead of doing hack browser seek, replay cached data 221 // since last keyframe. See http://crbug.com/304234. 222 bool doing_browser_seek_; 223 224 // If already doing a browser seek when a regular seek request arrives, 225 // these fields remember the regular seek so OnDemuxerSeekDone() can trigger 226 // it when the browser seek is done. These are only valid when 227 // |SEEK_EVENT_PENDING| is pending. 228 bool pending_seek_; 229 base::TimeDelta pending_seek_time_; 230 231 // Decoder jobs. 232 scoped_ptr<AudioDecoderJob, MediaDecoderJob::Deleter> audio_decoder_job_; 233 scoped_ptr<VideoDecoderJob, MediaDecoderJob::Deleter> video_decoder_job_; 234 235 // Track the most recent preroll target. Decoder re-creation needs this to 236 // resume any in-progress preroll. 237 base::TimeDelta preroll_timestamp_; 238 239 // A cancelable task that is posted when the audio decoder starts requesting 240 // new data. This callback runs if no data arrives before the timeout period 241 // elapses. 242 base::CancelableClosure decoder_starvation_callback_; 243 244 MediaDrmBridge* drm_bridge_; 245 int cdm_registration_id_; 246 247 // No decryption key available to decrypt the encrypted buffer. In this case, 248 // the player should pause. When a new key is added (OnKeyAdded()), we should 249 // try to start playback again. 250 bool is_waiting_for_key_; 251 252 // Indicates whether the player is waiting for audio or video decoder to be 253 // created. This could happen if video surface is not available or key is 254 // not added. 255 bool is_waiting_for_audio_decoder_; 256 bool is_waiting_for_video_decoder_; 257 258 // Test-only callback for hooking the completion of the next decode cycle. 259 base::Closure decode_callback_for_testing_; 260 261 // Whether |surface_| is currently used by the player. 262 bool is_surface_in_use_; 263 264 // Weak pointer passed to media decoder jobs for callbacks. 265 // NOTE: Weak pointers must be invalidated before all other member variables. 266 base::WeakPtrFactory<MediaSourcePlayer> weak_factory_; 267 base::WeakPtr<MediaSourcePlayer> weak_this_; 268 269 DISALLOW_COPY_AND_ASSIGN(MediaSourcePlayer); 270 }; 271 272 } // namespace media 273 274 #endif // MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_ 275