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/*
**
** Copyright 2012, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#ifndef INCLUDING_FROM_AUDIOFLINGER_H
#error This header file should only be included from AudioFlinger.h
#endif
// playback track
class Track : public TrackBase, public VolumeProvider {
public:
Track( PlaybackThread *thread,
const sp<Client>& client,
audio_stream_type_t streamType,
uint32_t sampleRate,
audio_format_t format,
audio_channel_mask_t channelMask,
size_t frameCount,
const sp<IMemory>& sharedBuffer,
int sessionId,
IAudioFlinger::track_flags_t flags);
virtual ~Track();
static void appendDumpHeader(String8& result);
void dump(char* buffer, size_t size);
virtual status_t start(AudioSystem::sync_event_t event =
AudioSystem::SYNC_EVENT_NONE,
int triggerSession = 0);
virtual void stop();
void pause();
void flush();
void destroy();
int name() const { return mName; }
audio_stream_type_t streamType() const {
return mStreamType;
}
status_t attachAuxEffect(int EffectId);
void setAuxBuffer(int EffectId, int32_t *buffer);
int32_t *auxBuffer() const { return mAuxBuffer; }
void setMainBuffer(int16_t *buffer) { mMainBuffer = buffer; }
int16_t *mainBuffer() const { return mMainBuffer; }
int auxEffectId() const { return mAuxEffectId; }
// implement FastMixerState::VolumeProvider interface
virtual uint32_t getVolumeLR();
virtual status_t setSyncEvent(const sp<SyncEvent>& event);
protected:
// for numerous
friend class PlaybackThread;
friend class MixerThread;
friend class DirectOutputThread;
Track(const Track&);
Track& operator = (const Track&);
// AudioBufferProvider interface
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer,
int64_t pts = kInvalidPTS);
// releaseBuffer() not overridden
virtual size_t framesReady() const;
bool isPausing() const { return mState == PAUSING; }
bool isPaused() const { return mState == PAUSED; }
bool isResuming() const { return mState == RESUMING; }
bool isReady() const;
void setPaused() { mState = PAUSED; }
void reset();
bool isOutputTrack() const {
return (mStreamType == AUDIO_STREAM_CNT);
}
sp<IMemory> sharedBuffer() const { return mSharedBuffer; }
// framesWritten is cumulative, never reset, and is shared all tracks
// audioHalFrames is derived from output latency
// FIXME parameters not needed, could get them from the thread
bool presentationComplete(size_t framesWritten, size_t audioHalFrames);
public:
void triggerEvents(AudioSystem::sync_event_t type);
void invalidate();
bool isInvalid() const { return mIsInvalid; }
virtual bool isTimedTrack() const { return false; }
bool isFastTrack() const { return (mFlags & IAudioFlinger::TRACK_FAST) != 0; }
protected:
// FILLED state is used for suppressing volume ramp at begin of playing
enum {FS_INVALID, FS_FILLING, FS_FILLED, FS_ACTIVE};
mutable uint8_t mFillingUpStatus;
int8_t mRetryCount;
const sp<IMemory> mSharedBuffer;
bool mResetDone;
const audio_stream_type_t mStreamType;
int mName; // track name on the normal mixer,
// allocated statically at track creation time,
// and is even allocated (though unused) for fast tracks
// FIXME don't allocate track name for fast tracks
int16_t *mMainBuffer;
int32_t *mAuxBuffer;
int mAuxEffectId;
bool mHasVolumeController;
size_t mPresentationCompleteFrames; // number of frames written to the
// audio HAL when this track will be fully rendered
// zero means not monitoring
private:
IAudioFlinger::track_flags_t mFlags;
// The following fields are only for fast tracks, and should be in a subclass
int mFastIndex; // index within FastMixerState::mFastTracks[];
// either mFastIndex == -1 if not isFastTrack()
// or 0 < mFastIndex < FastMixerState::kMaxFast because
// index 0 is reserved for normal mixer's submix;
// index is allocated statically at track creation time
// but the slot is only used if track is active
FastTrackUnderruns mObservedUnderruns; // Most recently observed value of
// mFastMixerDumpState.mTracks[mFastIndex].mUnderruns
uint32_t mUnderrunCount; // Counter of total number of underruns, never reset
volatile float mCachedVolume; // combined master volume and stream type volume;
// 'volatile' means accessed without lock or
// barrier, but is read/written atomically
bool mIsInvalid; // non-resettable latch, set by invalidate()
}; // end of Track
class TimedTrack : public Track {
public:
static sp<TimedTrack> create(PlaybackThread *thread,
const sp<Client>& client,
audio_stream_type_t streamType,
uint32_t sampleRate,
audio_format_t format,
audio_channel_mask_t channelMask,
size_t frameCount,
const sp<IMemory>& sharedBuffer,
int sessionId);
virtual ~TimedTrack();
class TimedBuffer {
public:
TimedBuffer();
TimedBuffer(const sp<IMemory>& buffer, int64_t pts);
const sp<IMemory>& buffer() const { return mBuffer; }
int64_t pts() const { return mPTS; }
uint32_t position() const { return mPosition; }
void setPosition(uint32_t pos) { mPosition = pos; }
private:
sp<IMemory> mBuffer;
int64_t mPTS;
uint32_t mPosition;
};
// Mixer facing methods.
virtual bool isTimedTrack() const { return true; }
virtual size_t framesReady() const;
// AudioBufferProvider interface
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer,
int64_t pts);
virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
// Client/App facing methods.
status_t allocateTimedBuffer(size_t size,
sp<IMemory>* buffer);
status_t queueTimedBuffer(const sp<IMemory>& buffer,
int64_t pts);
status_t setMediaTimeTransform(const LinearTransform& xform,
TimedAudioTrack::TargetTimeline target);
private:
TimedTrack(PlaybackThread *thread,
const sp<Client>& client,
audio_stream_type_t streamType,
uint32_t sampleRate,
audio_format_t format,
audio_channel_mask_t channelMask,
size_t frameCount,
const sp<IMemory>& sharedBuffer,
int sessionId);
void timedYieldSamples_l(AudioBufferProvider::Buffer* buffer);
void timedYieldSilence_l(uint32_t numFrames,
AudioBufferProvider::Buffer* buffer);
void trimTimedBufferQueue_l();
void trimTimedBufferQueueHead_l(const char* logTag);
void updateFramesPendingAfterTrim_l(const TimedBuffer& buf,
const char* logTag);
uint64_t mLocalTimeFreq;
LinearTransform mLocalTimeToSampleTransform;
LinearTransform mMediaTimeToSampleTransform;
sp<MemoryDealer> mTimedMemoryDealer;
Vector<TimedBuffer> mTimedBufferQueue;
bool mQueueHeadInFlight;
bool mTrimQueueHeadOnRelease;
uint32_t mFramesPendingInQueue;
uint8_t* mTimedSilenceBuffer;
uint32_t mTimedSilenceBufferSize;
mutable Mutex mTimedBufferQueueLock;
bool mTimedAudioOutputOnTime;
CCHelper mCCHelper;
Mutex mMediaTimeTransformLock;
LinearTransform mMediaTimeTransform;
bool mMediaTimeTransformValid;
TimedAudioTrack::TargetTimeline mMediaTimeTransformTarget;
};
// playback track, used by DuplicatingThread
class OutputTrack : public Track {
public:
class Buffer : public AudioBufferProvider::Buffer {
public:
int16_t *mBuffer;
};
OutputTrack(PlaybackThread *thread,
DuplicatingThread *sourceThread,
uint32_t sampleRate,
audio_format_t format,
audio_channel_mask_t channelMask,
size_t frameCount);
virtual ~OutputTrack();
virtual status_t start(AudioSystem::sync_event_t event =
AudioSystem::SYNC_EVENT_NONE,
int triggerSession = 0);
virtual void stop();
bool write(int16_t* data, uint32_t frames);
bool bufferQueueEmpty() const { return mBufferQueue.size() == 0; }
bool isActive() const { return mActive; }
const wp<ThreadBase>& thread() const { return mThread; }
private:
enum {
NO_MORE_BUFFERS = 0x80000001, // same in AudioTrack.h, ok to be different value
};
status_t obtainBuffer(AudioBufferProvider::Buffer* buffer,
uint32_t waitTimeMs);
void clearBufferQueue();
// Maximum number of pending buffers allocated by OutputTrack::write()
static const uint8_t kMaxOverFlowBuffers = 10;
Vector < Buffer* > mBufferQueue;
AudioBufferProvider::Buffer mOutBuffer;
bool mActive;
DuplicatingThread* const mSourceThread; // for waitTimeMs() in write()
AudioTrackClientProxy* mClientProxy;
}; // end of OutputTrack