diff options
Diffstat (limited to 'services/audioflinger/Threads.h')
| -rw-r--r-- | services/audioflinger/Threads.h | 186 |
1 files changed, 166 insertions, 20 deletions
diff --git a/services/audioflinger/Threads.h b/services/audioflinger/Threads.h index 7de6872..802b784 100644 --- a/services/audioflinger/Threads.h +++ b/services/audioflinger/Threads.h @@ -28,7 +28,8 @@ public: MIXER, // Thread class is MixerThread DIRECT, // Thread class is DirectOutputThread DUPLICATING, // Thread class is DuplicatingThread - RECORD // Thread class is RecordThread + RECORD, // Thread class is RecordThread + OFFLOAD // Thread class is OffloadThread }; ThreadBase(const sp<AudioFlinger>& audioFlinger, audio_io_handle_t id, @@ -125,10 +126,9 @@ public: audio_channel_mask_t channelMask() const { return mChannelMask; } audio_format_t format() const { return mFormat; } // Called by AudioFlinger::frameCount(audio_io_handle_t output) and effects, - // and returns the normal mix buffer's frame count. - size_t frameCount() const { return mNormalFrameCount; } - // Return's the HAL's frame count i.e. fast mixer buffer size. - size_t frameCountHAL() const { return mFrameCount; } + // and returns the [normal mix] buffer's frame count. + virtual size_t frameCount() const = 0; + size_t frameSize() const { return mFrameSize; } // Should be "virtual status_t requestExitAndWait()" and override same // method in Thread, but Thread::requestExitAndWait() is not yet virtual. @@ -184,6 +184,8 @@ public: void lockEffectChains_l(Vector< sp<EffectChain> >& effectChains); // unlock effect chains after process void unlockEffectChains(const Vector< sp<EffectChain> >& effectChains); + // get a copy of mEffectChains vector + Vector< sp<EffectChain> > getEffectChains_l() const { return mEffectChains; }; // set audio mode to all effect chains void setMode(audio_mode_t mode); // get effect module with corresponding ID on specified audio session @@ -235,8 +237,8 @@ protected: effect_uuid_t mType; // effect type UUID }; - void acquireWakeLock(); - void acquireWakeLock_l(); + void acquireWakeLock(int uid = -1); + void acquireWakeLock_l(int uid = -1); void releaseWakeLock(); void releaseWakeLock_l(); void setEffectSuspended_l(const effect_uuid_t *type, @@ -249,6 +251,8 @@ protected: // check if some effects must be suspended when an effect chain is added void checkSuspendOnAddEffectChain_l(const sp<EffectChain>& chain); + String16 getWakeLockTag(); + virtual void preExit() { } friend class AudioFlinger; // for mEffectChains @@ -259,11 +263,13 @@ protected: Condition mWaitWorkCV; const sp<AudioFlinger> mAudioFlinger; + + // updated by PlaybackThread::readOutputParameters() or + // RecordThread::readInputParameters() uint32_t mSampleRate; size_t mFrameCount; // output HAL, direct output, record - size_t mNormalFrameCount; // normal mixer and effects audio_channel_mask_t mChannelMask; - uint16_t mChannelCount; + uint32_t mChannelCount; size_t mFrameSize; audio_format_t mFormat; @@ -290,6 +296,7 @@ protected: Vector<String8> mNewParameters; status_t mParamStatus; + // vector owns each ConfigEvent *, so must delete after removing Vector<ConfigEvent *> mConfigEvents; // These fields are written and read by thread itself without lock or barrier, @@ -328,11 +335,19 @@ public: enum mixer_state { MIXER_IDLE, // no active tracks MIXER_TRACKS_ENABLED, // at least one active track, but no track has any data ready - MIXER_TRACKS_READY // at least one active track, and at least one track has data + MIXER_TRACKS_READY, // at least one active track, and at least one track has data + MIXER_DRAIN_TRACK, // drain currently playing track + MIXER_DRAIN_ALL, // fully drain the hardware // standby mode does not have an enum value // suspend by audio policy manager is orthogonal to mixer state }; + // retry count before removing active track in case of underrun on offloaded thread: + // we need to make sure that AudioTrack client has enough time to send large buffers +//FIXME may be more appropriate if expressed in time units. Need to revise how underrun is handled + // for offloaded tracks + static const int8_t kMaxTrackRetriesOffload = 20; + PlaybackThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, audio_io_handle_t id, audio_devices_t device, type_t type); virtual ~PlaybackThread(); @@ -350,8 +365,10 @@ protected: // Code snippets that were lifted up out of threadLoop() virtual void threadLoop_mix() = 0; virtual void threadLoop_sleepTime() = 0; - virtual void threadLoop_write(); + virtual ssize_t threadLoop_write(); + virtual void threadLoop_drain(); virtual void threadLoop_standby(); + virtual void threadLoop_exit(); virtual void threadLoop_removeTracks(const Vector< sp<Track> >& tracksToRemove); // prepareTracks_l reads and writes mActiveTracks, and returns @@ -359,6 +376,19 @@ protected: // is responsible for clearing or destroying this Vector later on, when it // is safe to do so. That will drop the final ref count and destroy the tracks. virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove) = 0; + void removeTracks_l(const Vector< sp<Track> >& tracksToRemove); + + void writeCallback(); + void resetWriteBlocked(uint32_t sequence); + void drainCallback(); + void resetDraining(uint32_t sequence); + + static int asyncCallback(stream_callback_event_t event, void *param, void *cookie); + + virtual bool waitingAsyncCallback(); + virtual bool waitingAsyncCallback_l(); + virtual bool shouldStandby_l(); + // ThreadBase virtuals virtual void preExit(); @@ -429,11 +459,23 @@ public: virtual status_t setSyncEvent(const sp<SyncEvent>& event); virtual bool isValidSyncEvent(const sp<SyncEvent>& event) const; + + // called with AudioFlinger lock held void invalidateTracks(audio_stream_type_t streamType); + virtual size_t frameCount() const { return mNormalFrameCount; } + + // Return's the HAL's frame count i.e. fast mixer buffer size. + size_t frameCountHAL() const { return mFrameCount; } + + status_t getTimestamp_l(AudioTimestamp& timestamp); protected: - int16_t* mMixBuffer; + // updated by readOutputParameters() + size_t mNormalFrameCount; // normal mixer and effects + + int16_t* mMixBuffer; // frame size aligned mix buffer + int8_t* mAllocMixBuffer; // mixer buffer allocation address // suspend count, > 0 means suspended. While suspended, the thread continues to pull from // tracks and mix, but doesn't write to HAL. A2DP and SCO HAL implementations can't handle @@ -486,8 +528,9 @@ private: PlaybackThread& operator = (const PlaybackThread&); status_t addTrack_l(const sp<Track>& track); - void destroyTrack_l(const sp<Track>& track); + bool destroyTrack_l(const sp<Track>& track); void removeTrack_l(const sp<Track>& track); + void broadcast_l(); void readOutputParameters(); @@ -535,6 +578,27 @@ private: // DUPLICATING only uint32_t writeFrames; + size_t mBytesRemaining; + size_t mCurrentWriteLength; + bool mUseAsyncWrite; + // mWriteAckSequence contains current write sequence on bits 31-1. The write sequence is + // incremented each time a write(), a flush() or a standby() occurs. + // Bit 0 is set when a write blocks and indicates a callback is expected. + // Bit 0 is reset by the async callback thread calling resetWriteBlocked(). Out of sequence + // callbacks are ignored. + uint32_t mWriteAckSequence; + // mDrainSequence contains current drain sequence on bits 31-1. The drain sequence is + // incremented each time a drain is requested or a flush() or standby() occurs. + // Bit 0 is set when the drain() command is called at the HAL and indicates a callback is + // expected. + // Bit 0 is reset by the async callback thread calling resetDraining(). Out of sequence + // callbacks are ignored. + uint32_t mDrainSequence; + // A condition that must be evaluated by prepareTrack_l() has changed and we must not wait + // for async write callback in the thread loop before evaluating it + bool mSignalPending; + sp<AsyncCallbackThread> mCallbackThread; + private: // The HAL output sink is treated as non-blocking, but current implementation is blocking sp<NBAIO_Sink> mOutputSink; @@ -558,7 +622,18 @@ public: protected: // accessed by both binder threads and within threadLoop(), lock on mutex needed unsigned mFastTrackAvailMask; // bit i set if fast track [i] is available + virtual void flushOutput_l(); +private: + // timestamp latch: + // D input is written by threadLoop_write while mutex is unlocked, and read while locked + // Q output is written while locked, and read while locked + struct { + AudioTimestamp mTimestamp; + uint32_t mUnpresentedFrames; + } mLatchD, mLatchQ; + bool mLatchDValid; // true means mLatchD is valid, and clock it into latch at next opportunity + bool mLatchQValid; // true means mLatchQ is valid }; class MixerThread : public PlaybackThread { @@ -584,7 +659,7 @@ protected: virtual void cacheParameters_l(); // threadLoop snippets - virtual void threadLoop_write(); + virtual ssize_t threadLoop_write(); virtual void threadLoop_standby(); virtual void threadLoop_mix(); virtual void threadLoop_sleepTime(); @@ -641,17 +716,81 @@ protected: virtual void threadLoop_mix(); virtual void threadLoop_sleepTime(); -private: // volumes last sent to audio HAL with stream->set_volume() float mLeftVolFloat; float mRightVolFloat; + DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, + audio_io_handle_t id, uint32_t device, ThreadBase::type_t type); + void processVolume_l(Track *track, bool lastTrack); + // prepareTracks_l() tells threadLoop_mix() the name of the single active track sp<Track> mActiveTrack; public: virtual bool hasFastMixer() const { return false; } }; +class OffloadThread : public DirectOutputThread { +public: + + OffloadThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, + audio_io_handle_t id, uint32_t device); + virtual ~OffloadThread(); + +protected: + // threadLoop snippets + virtual mixer_state prepareTracks_l(Vector< sp<Track> > *tracksToRemove); + virtual void threadLoop_exit(); + virtual void flushOutput_l(); + + virtual bool waitingAsyncCallback(); + virtual bool waitingAsyncCallback_l(); + virtual bool shouldStandby_l(); + +private: + void flushHw_l(); + +private: + bool mHwPaused; + bool mFlushPending; + size_t mPausedWriteLength; // length in bytes of write interrupted by pause + size_t mPausedBytesRemaining; // bytes still waiting in mixbuffer after resume + sp<Track> mPreviousTrack; // used to detect track switch +}; + +class AsyncCallbackThread : public Thread { +public: + + AsyncCallbackThread(const wp<PlaybackThread>& playbackThread); + + virtual ~AsyncCallbackThread(); + + // Thread virtuals + virtual bool threadLoop(); + + // RefBase + virtual void onFirstRef(); + + void exit(); + void setWriteBlocked(uint32_t sequence); + void resetWriteBlocked(); + void setDraining(uint32_t sequence); + void resetDraining(); + +private: + const wp<PlaybackThread> mPlaybackThread; + // mWriteAckSequence corresponds to the last write sequence passed by the offload thread via + // setWriteBlocked(). The sequence is shifted one bit to the left and the lsb is used + // to indicate that the callback has been received via resetWriteBlocked() + uint32_t mWriteAckSequence; + // mDrainSequence corresponds to the last drain sequence passed by the offload thread via + // setDraining(). The sequence is shifted one bit to the left and the lsb is used + // to indicate that the callback has been received via resetDraining() + uint32_t mDrainSequence; + Condition mWaitWorkCV; + Mutex mLock; +}; + class DuplicatingThread : public MixerThread { public: DuplicatingThread(const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread, @@ -671,7 +810,7 @@ protected: // threadLoop snippets virtual void threadLoop_mix(); virtual void threadLoop_sleepTime(); - virtual void threadLoop_write(); + virtual ssize_t threadLoop_write(); virtual void threadLoop_standby(); virtual void cacheParameters_l(); @@ -734,7 +873,7 @@ public: audio_channel_mask_t channelMask, size_t frameCount, int sessionId, - IAudioFlinger::track_flags_t flags, + IAudioFlinger::track_flags_t *flags, pid_t tid, status_t *status); @@ -744,7 +883,7 @@ public: // ask the thread to stop the specified track, and // return true if the caller should then do it's part of the stopping process - bool stop_l(RecordTrack* recordTrack); + bool stop(RecordTrack* recordTrack); void dump(int fd, const Vector<String16>& args); AudioStreamIn* clearInput(); @@ -775,6 +914,9 @@ public: static void syncStartEventCallback(const wp<SyncEvent>& event); void handleSyncStartEvent(const sp<SyncEvent>& event); + virtual size_t frameCount() const { return mFrameCount; } + bool hasFastRecorder() const { return false; } + private: void clearSyncStartEvent(); @@ -790,11 +932,14 @@ private: // is used together with mStartStopCond to indicate start()/stop() progress sp<RecordTrack> mActiveTrack; Condition mStartStopCond; + + // updated by RecordThread::readInputParameters() AudioResampler *mResampler; + // interleaved stereo pairs of fixed-point signed Q19.12 int32_t *mRsmpOutBuffer; - int16_t *mRsmpInBuffer; + int16_t *mRsmpInBuffer; // [mFrameCount * mChannelCount] size_t mRsmpInIndex; - size_t mInputBytes; + size_t mBufferSize; // stream buffer size for read() const uint32_t mReqChannelCount; const uint32_t mReqSampleRate; ssize_t mBytesRead; @@ -808,4 +953,5 @@ private: // For dumpsys const sp<NBAIO_Sink> mTeeSink; + int mClientUid; }; |