diff options
Diffstat (limited to 'services/audioflinger/Threads.cpp')
-rw-r--r-- | services/audioflinger/Threads.cpp | 84 |
1 files changed, 56 insertions, 28 deletions
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp index 7e71613..c096bdd 100644 --- a/services/audioflinger/Threads.cpp +++ b/services/audioflinger/Threads.cpp @@ -5593,6 +5593,7 @@ reacquire_wakelock: continue; } + // TODO: This code probably should be moved to RecordTrack. // TODO: Update the activeTrack buffer converter in case of reconfigure. enum { @@ -5609,24 +5610,14 @@ reacquire_wakelock: size_t framesOut = activeTrack->mSink.frameCount; LOG_ALWAYS_FATAL_IF((status == OK) != (framesOut > 0)); - int32_t front = activeTrack->mRsmpInFront; - ssize_t filled = rear - front; + // check available frames and handle overrun conditions + // if the record track isn't draining fast enough. + bool hasOverrun; size_t framesIn; - - if (filled < 0) { - // should not happen, but treat like a massive overrun and re-sync - framesIn = 0; - activeTrack->mRsmpInFront = rear; - overrun = OVERRUN_TRUE; - } else if ((size_t) filled <= mRsmpInFrames) { - framesIn = (size_t) filled; - } else { - // client is not keeping up with server, but give it latest data - framesIn = mRsmpInFrames; - activeTrack->mRsmpInFront = front = rear - framesIn; + activeTrack->mResamplerBufferProvider->sync(&framesIn, &hasOverrun); + if (hasOverrun) { overrun = OVERRUN_TRUE; } - if (framesOut == 0 || framesIn == 0) { break; } @@ -5942,8 +5933,7 @@ status_t AudioFlinger::RecordThread::start(RecordThread::RecordTrack* recordTrac // was initialized to some value closer to the thread's mRsmpInFront, then the track could // see previously buffered data before it called start(), but with greater risk of overrun. - recordTrack->mRsmpInFront = mRsmpInRear; - recordTrack->mRsmpInUnrel = 0; + recordTrack->mResamplerBufferProvider->reset(); // clear any converter state as new data will be discontinuous recordTrack->mRecordBufferConverter->reset(); recordTrack->mState = TrackBase::STARTING_2; @@ -6121,12 +6111,52 @@ void AudioFlinger::RecordThread::dumpTracks(int fd, const Vector<String16>& args write(fd, result.string(), result.size()); } + +void AudioFlinger::RecordThread::ResamplerBufferProvider::reset() +{ + sp<ThreadBase> threadBase = mRecordTrack->mThread.promote(); + RecordThread *recordThread = (RecordThread *) threadBase.get(); + mRsmpInFront = recordThread->mRsmpInRear; + mRsmpInUnrel = 0; +} + +void AudioFlinger::RecordThread::ResamplerBufferProvider::sync( + size_t *framesAvailable, bool *hasOverrun) +{ + sp<ThreadBase> threadBase = mRecordTrack->mThread.promote(); + RecordThread *recordThread = (RecordThread *) threadBase.get(); + const int32_t rear = recordThread->mRsmpInRear; + const int32_t front = mRsmpInFront; + const ssize_t filled = rear - front; + + size_t framesIn; + bool overrun = false; + if (filled < 0) { + // should not happen, but treat like a massive overrun and re-sync + framesIn = 0; + mRsmpInFront = rear; + overrun = true; + } else if ((size_t) filled <= recordThread->mRsmpInFrames) { + framesIn = (size_t) filled; + } else { + // client is not keeping up with server, but give it latest data + framesIn = recordThread->mRsmpInFrames; + mRsmpInFront = /* front = */ rear - framesIn; + overrun = true; + } + if (framesAvailable != NULL) { + *framesAvailable = framesIn; + } + if (hasOverrun != NULL) { + *hasOverrun = overrun; + } +} + // AudioBufferProvider interface status_t AudioFlinger::RecordThread::ResamplerBufferProvider::getNextBuffer( AudioBufferProvider::Buffer* buffer, int64_t pts __unused) { - RecordTrack *activeTrack = mRecordTrack; - sp<ThreadBase> threadBase = activeTrack->mThread.promote(); + sp<ThreadBase> threadBase = mRecordTrack->mThread.promote(); if (threadBase == 0) { buffer->frameCount = 0; buffer->raw = NULL; @@ -6134,7 +6164,7 @@ status_t AudioFlinger::RecordThread::ResamplerBufferProvider::getNextBuffer( } RecordThread *recordThread = (RecordThread *) threadBase.get(); int32_t rear = recordThread->mRsmpInRear; - int32_t front = activeTrack->mRsmpInFront; + int32_t front = mRsmpInFront; ssize_t filled = rear - front; // FIXME should not be P2 (don't want to increase latency) // FIXME if client not keeping up, discard @@ -6151,17 +6181,16 @@ status_t AudioFlinger::RecordThread::ResamplerBufferProvider::getNextBuffer( part1 = ask; } if (part1 == 0) { - // Higher-level should keep mRsmpInBuffer full, and not call resampler if empty - LOG_ALWAYS_FATAL("RecordThread::getNextBuffer() starved"); + // out of data is fine since the resampler will return a short-count. buffer->raw = NULL; buffer->frameCount = 0; - activeTrack->mRsmpInUnrel = 0; + mRsmpInUnrel = 0; return NOT_ENOUGH_DATA; } buffer->raw = recordThread->mRsmpInBuffer + front * recordThread->mChannelCount; buffer->frameCount = part1; - activeTrack->mRsmpInUnrel = part1; + mRsmpInUnrel = part1; return NO_ERROR; } @@ -6169,14 +6198,13 @@ status_t AudioFlinger::RecordThread::ResamplerBufferProvider::getNextBuffer( void AudioFlinger::RecordThread::ResamplerBufferProvider::releaseBuffer( AudioBufferProvider::Buffer* buffer) { - RecordTrack *activeTrack = mRecordTrack; size_t stepCount = buffer->frameCount; if (stepCount == 0) { return; } - ALOG_ASSERT(stepCount <= activeTrack->mRsmpInUnrel); - activeTrack->mRsmpInUnrel -= stepCount; - activeTrack->mRsmpInFront += stepCount; + ALOG_ASSERT(stepCount <= mRsmpInUnrel); + mRsmpInUnrel -= stepCount; + mRsmpInFront += stepCount; buffer->raw = NULL; buffer->frameCount = 0; } |