1 /* 2 ** 3 ** Copyright 2012, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #ifndef INCLUDING_FROM_AUDIOFLINGER_H 19 #error This header file should only be included from AudioFlinger.h 20 #endif 21 22 // playback track 23 class Track : public TrackBase, public VolumeProvider { 24 public: 25 Track( PlaybackThread *thread, 26 const sp<Client>& client, 27 audio_stream_type_t streamType, 28 uint32_t sampleRate, 29 audio_format_t format, 30 audio_channel_mask_t channelMask, 31 size_t frameCount, 32 void *buffer, 33 size_t bufferSize, 34 const sp<IMemory>& sharedBuffer, 35 audio_session_t sessionId, 36 uid_t uid, 37 audio_output_flags_t flags, 38 track_type type, 39 audio_port_handle_t portId = AUDIO_PORT_HANDLE_NONE); 40 virtual ~Track(); 41 virtual status_t initCheck() const; 42 43 static void appendDumpHeader(String8& result); 44 void appendDump(String8& result, bool active); 45 virtual status_t start(AudioSystem::sync_event_t event = 46 AudioSystem::SYNC_EVENT_NONE, 47 audio_session_t triggerSession = AUDIO_SESSION_NONE); 48 virtual void stop(); 49 void pause(); 50 51 void flush(); 52 void destroy(); 53 int name() const { return mName; } 54 55 virtual uint32_t sampleRate() const; 56 57 audio_stream_type_t streamType() const { 58 return mStreamType; 59 } 60 bool isOffloaded() const 61 { return (mFlags & AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD) != 0; } 62 bool isDirect() const { return (mFlags & AUDIO_OUTPUT_FLAG_DIRECT) != 0; } 63 bool isOffloadedOrDirect() const { return (mFlags 64 & (AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD 65 | AUDIO_OUTPUT_FLAG_DIRECT)) != 0; } 66 67 status_t setParameters(const String8& keyValuePairs); 68 status_t attachAuxEffect(int EffectId); 69 void setAuxBuffer(int EffectId, int32_t *buffer); 70 int32_t *auxBuffer() const { return mAuxBuffer; } 71 void setMainBuffer(int16_t *buffer) { mMainBuffer = buffer; } 72 int16_t *mainBuffer() const { return mMainBuffer; } 73 int auxEffectId() const { return mAuxEffectId; } 74 virtual status_t getTimestamp(AudioTimestamp& timestamp); 75 void signal(); 76 77 // implement FastMixerState::VolumeProvider interface 78 virtual gain_minifloat_packed_t getVolumeLR(); 79 80 virtual status_t setSyncEvent(const sp<SyncEvent>& event); 81 82 virtual bool isFastTrack() const { return (mFlags & AUDIO_OUTPUT_FLAG_FAST) != 0; } 83 84 // implement volume handling. 85 VolumeShaper::Status applyVolumeShaper( 86 const sp<VolumeShaper::Configuration>& configuration, 87 const sp<VolumeShaper::Operation>& operation); 88 sp<VolumeShaper::State> getVolumeShaperState(int id); 89 sp<VolumeHandler> getVolumeHandler() { return mVolumeHandler; } 90 91 protected: 92 // for numerous 93 friend class PlaybackThread; 94 friend class MixerThread; 95 friend class DirectOutputThread; 96 friend class OffloadThread; 97 98 DISALLOW_COPY_AND_ASSIGN(Track); 99 100 // AudioBufferProvider interface 101 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer); 102 // releaseBuffer() not overridden 103 104 // ExtendedAudioBufferProvider interface 105 virtual size_t framesReady() const; 106 virtual int64_t framesReleased() const; 107 virtual void onTimestamp(const ExtendedTimestamp ×tamp); 108 109 bool isPausing() const { return mState == PAUSING; } 110 bool isPaused() const { return mState == PAUSED; } 111 bool isResuming() const { return mState == RESUMING; } 112 bool isReady() const; 113 void setPaused() { mState = PAUSED; } 114 void reset(); 115 bool isFlushPending() const { return mFlushHwPending; } 116 void flushAck(); 117 bool isResumePending(); 118 void resumeAck(); 119 void updateTrackFrameInfo(int64_t trackFramesReleased, int64_t sinkFramesWritten, 120 const ExtendedTimestamp &timeStamp); 121 122 sp<IMemory> sharedBuffer() const { return mSharedBuffer; } 123 124 // framesWritten is cumulative, never reset, and is shared all tracks 125 // audioHalFrames is derived from output latency 126 // FIXME parameters not needed, could get them from the thread 127 bool presentationComplete(int64_t framesWritten, size_t audioHalFrames); 128 void signalClientFlag(int32_t flag); 129 130 public: 131 void triggerEvents(AudioSystem::sync_event_t type); 132 virtual void invalidate(); 133 void disable(); 134 135 int fastIndex() const { return mFastIndex; } 136 137 protected: 138 139 // FILLED state is used for suppressing volume ramp at begin of playing 140 enum {FS_INVALID, FS_FILLING, FS_FILLED, FS_ACTIVE}; 141 mutable uint8_t mFillingUpStatus; 142 int8_t mRetryCount; 143 144 // see comment at AudioFlinger::PlaybackThread::Track::~Track for why this can't be const 145 sp<IMemory> mSharedBuffer; 146 147 bool mResetDone; 148 const audio_stream_type_t mStreamType; 149 int mName; // track name on the normal mixer, 150 // allocated statically at track creation time, 151 // and is even allocated (though unused) for fast tracks 152 // FIXME don't allocate track name for fast tracks 153 int16_t *mMainBuffer; 154 int32_t *mAuxBuffer; 155 int mAuxEffectId; 156 bool mHasVolumeController; 157 size_t mPresentationCompleteFrames; // number of frames written to the 158 // audio HAL when this track will be fully rendered 159 // zero means not monitoring 160 161 // access these three variables only when holding thread lock. 162 LinearMap<int64_t> mFrameMap; // track frame to server frame mapping 163 164 ExtendedTimestamp mSinkTimestamp; 165 166 sp<VolumeHandler> mVolumeHandler; // handles multiple VolumeShaper configs and operations 167 168 private: 169 // The following fields are only for fast tracks, and should be in a subclass 170 int mFastIndex; // index within FastMixerState::mFastTracks[]; 171 // either mFastIndex == -1 if not isFastTrack() 172 // or 0 < mFastIndex < FastMixerState::kMaxFast because 173 // index 0 is reserved for normal mixer's submix; 174 // index is allocated statically at track creation time 175 // but the slot is only used if track is active 176 FastTrackUnderruns mObservedUnderruns; // Most recently observed value of 177 // mFastMixerDumpState.mTracks[mFastIndex].mUnderruns 178 volatile float mCachedVolume; // combined master volume and stream type volume; 179 // 'volatile' means accessed without lock or 180 // barrier, but is read/written atomically 181 sp<AudioTrackServerProxy> mAudioTrackServerProxy; 182 bool mResumeToStopping; // track was paused in stopping state. 183 bool mFlushHwPending; // track requests for thread flush 184 audio_output_flags_t mFlags; 185 }; // end of Track 186 187 188 // playback track, used by DuplicatingThread 189 class OutputTrack : public Track { 190 public: 191 192 class Buffer : public AudioBufferProvider::Buffer { 193 public: 194 void *mBuffer; 195 }; 196 197 OutputTrack(PlaybackThread *thread, 198 DuplicatingThread *sourceThread, 199 uint32_t sampleRate, 200 audio_format_t format, 201 audio_channel_mask_t channelMask, 202 size_t frameCount, 203 uid_t uid); 204 virtual ~OutputTrack(); 205 206 virtual status_t start(AudioSystem::sync_event_t event = 207 AudioSystem::SYNC_EVENT_NONE, 208 audio_session_t triggerSession = AUDIO_SESSION_NONE); 209 virtual void stop(); 210 bool write(void* data, uint32_t frames); 211 bool bufferQueueEmpty() const { return mBufferQueue.size() == 0; } 212 bool isActive() const { return mActive; } 213 const wp<ThreadBase>& thread() const { return mThread; } 214 215 private: 216 217 status_t obtainBuffer(AudioBufferProvider::Buffer* buffer, 218 uint32_t waitTimeMs); 219 void clearBufferQueue(); 220 221 void restartIfDisabled(); 222 223 // Maximum number of pending buffers allocated by OutputTrack::write() 224 static const uint8_t kMaxOverFlowBuffers = 10; 225 226 Vector < Buffer* > mBufferQueue; 227 AudioBufferProvider::Buffer mOutBuffer; 228 bool mActive; 229 DuplicatingThread* const mSourceThread; // for waitTimeMs() in write() 230 sp<AudioTrackClientProxy> mClientProxy; 231 }; // end of OutputTrack 232 233 // playback track, used by PatchPanel 234 class PatchTrack : public Track, public PatchProxyBufferProvider { 235 public: 236 237 PatchTrack(PlaybackThread *playbackThread, 238 audio_stream_type_t streamType, 239 uint32_t sampleRate, 240 audio_channel_mask_t channelMask, 241 audio_format_t format, 242 size_t frameCount, 243 void *buffer, 244 size_t bufferSize, 245 audio_output_flags_t flags); 246 virtual ~PatchTrack(); 247 248 virtual status_t start(AudioSystem::sync_event_t event = 249 AudioSystem::SYNC_EVENT_NONE, 250 audio_session_t triggerSession = AUDIO_SESSION_NONE); 251 252 // AudioBufferProvider interface 253 virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer); 254 virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer); 255 256 // PatchProxyBufferProvider interface 257 virtual status_t obtainBuffer(Proxy::Buffer* buffer, 258 const struct timespec *timeOut = NULL); 259 virtual void releaseBuffer(Proxy::Buffer* buffer); 260 261 void setPeerProxy(PatchProxyBufferProvider *proxy) { mPeerProxy = proxy; } 262 263 private: 264 void restartIfDisabled(); 265 266 sp<ClientProxy> mProxy; 267 PatchProxyBufferProvider* mPeerProxy; 268 struct timespec mPeerTimeout; 269 }; // end of PatchTrack 270
