Pipe::Pipe(size_t maxFrames, const NBAIO_Format& format, void *buffer) :
NBAIO_Sink(format),
// TODO fifo now supports non-power-of-2 buffer sizes, so could remove the roundup
mMaxFrames(roundup(maxFrames)),
mBuffer(buffer == NULL ? malloc(mMaxFrames * Format_frameSize(format)) : buffer),
mFifo(mMaxFrames, Format_frameSize(format), mBuffer, false /*throttlesWriter*/),
mFifoWriter(mFifo),
mReaders(0),
mFreeBufferInDestructor(buffer == NULL)
{
}
// This is a default implementation; it is expected that subclasses will optimize this.
ssize_t NBAIO_Source::readVia(readVia_t via, size_t total, void *user,
int64_t readPTS, size_t block)
{
if (!mNegotiated) {
return (ssize_t) NEGOTIATE;
}
static const size_t maxBlock = 32;
size_t frameSize = Format_frameSize(mFormat);
ALOG_ASSERT(frameSize > 0 && frameSize <= 8);
// double guarantees alignment for stack similar to what malloc() gives for heap
if (block == 0 || block > maxBlock) {
block = maxBlock;
}
double buffer[((frameSize * block) + sizeof(double) - 1) / sizeof(double)];
size_t accumulator = 0;
while (accumulator < total) {
size_t count = total - accumulator;
if (count > block) {
count = block;
}
ssize_t ret = read(buffer, count, readPTS);
if (ret > 0) {
ALOG_ASSERT((size_t) ret <= count);
size_t maxRet = ret;
ret = via(user, buffer, maxRet, readPTS);
if (ret > 0) {
ALOG_ASSERT((size_t) ret <= maxRet);
accumulator += ret;
continue;
}
}
return accumulator > 0 ? accumulator : ret;
}
return accumulator;
}
void FastCapture::onWork()
{
const FastCaptureState * const current = (const FastCaptureState *) mCurrent;
FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) mDumpState;
const FastCaptureState::Command command = mCommand;
const size_t frameCount = current->mFrameCount;
if ((command & FastCaptureState::READ) /*&& isWarm*/) {
ALOG_ASSERT(mInputSource != NULL);
ALOG_ASSERT(mReadBuffer != NULL);
dumpState->mReadSequence++;
ATRACE_BEGIN("read");
ssize_t framesRead = mInputSource->read(mReadBuffer, frameCount,
AudioBufferProvider::kInvalidPTS);
ATRACE_END();
dumpState->mReadSequence++;
if (framesRead >= 0) {
LOG_ALWAYS_FATAL_IF((size_t) framesRead > frameCount);
mTotalNativeFramesRead += framesRead;
dumpState->mFramesRead = mTotalNativeFramesRead;
mReadBufferState = framesRead;
} else {
dumpState->mReadErrors++;
mReadBufferState = 0;
}
// FIXME rename to attemptedIO
mAttemptedWrite = true;
}
if (command & FastCaptureState::WRITE) {
ALOG_ASSERT(mPipeSink != NULL);
ALOG_ASSERT(mReadBuffer != NULL);
if (mReadBufferState < 0) {
unsigned channelCount = Format_channelCount(mFormat);
memset(mReadBuffer, 0, frameCount * Format_frameSize(mFormat));
mReadBufferState = frameCount;
}
if (mReadBufferState > 0) {
ssize_t framesWritten = mPipeSink->write(mReadBuffer, mReadBufferState);
// FIXME This supports at most one fast capture client.
// To handle multiple clients this could be converted to an array,
// or with a lot more work the control block could be shared by all clients.
audio_track_cblk_t* cblk = current->mCblk;
if (cblk != NULL && framesWritten > 0) {
int32_t rear = cblk->u.mStreaming.mRear;
android_atomic_release_store(framesWritten + rear, &cblk->u.mStreaming.mRear);
cblk->mServer += framesWritten;
int32_t old = android_atomic_or(CBLK_FUTEX_WAKE, &cblk->mFutex);
if (!(old & CBLK_FUTEX_WAKE)) {
// client is never in server process, so don't use FUTEX_WAKE_PRIVATE
(void) syscall(__NR_futex, &cblk->mFutex, FUTEX_WAKE, 1);
}
}
}
}
}
MonoPipe::MonoPipe(size_t reqFrames, const NBAIO_Format& format, bool writeCanBlock) :
NBAIO_Sink(format),
mUpdateSeq(0),
mReqFrames(reqFrames),
mMaxFrames(roundup(reqFrames)),
mBuffer(malloc(mMaxFrames * Format_frameSize(format))),
mFront(0),
mRear(0),
mWriteTsValid(false),
// mWriteTs
mSetpoint((reqFrames * 11) / 16),
mWriteCanBlock(writeCanBlock),
mIsShutdown(false),
// mTimestampShared
mTimestampMutator(&mTimestampShared),
mTimestampObserver(&mTimestampShared)
{
uint64_t N, D;
mNextRdPTS = AudioBufferProvider::kInvalidPTS;
mSamplesToLocalTime.a_zero = 0;
mSamplesToLocalTime.b_zero = 0;
mSamplesToLocalTime.a_to_b_numer = 0;
mSamplesToLocalTime.a_to_b_denom = 0;
D = Format_sampleRate(format);
(void) pthread_once(&cacheOnceControl, cacheOnceInit);
if (!cacheValid) {
// log has already been done
return;
}
N = cacheN;
LinearTransform::reduce(&N, &D);
static const uint64_t kSignedHiBitsMask = ~(0x7FFFFFFFull);
static const uint64_t kUnsignedHiBitsMask = ~(0xFFFFFFFFull);
if ((N & kSignedHiBitsMask) || (D & kUnsignedHiBitsMask)) {
ALOGE("Cannot reduce sample rate to local clock frequency ratio to fit"
" in a 32/32 bit rational. (max reduction is 0x%016" PRIx64 "/0x%016" PRIx64
"). getNextWriteTimestamp calls will be non-functional", N, D);
return;
}
mSamplesToLocalTime.a_to_b_numer = static_cast<int32_t>(N);
mSamplesToLocalTime.a_to_b_denom = static_cast<uint32_t>(D);
}
MonoPipe::MonoPipe(size_t reqFrames, NBAIO_Format format, bool writeCanBlock) :
NBAIO_Sink(format),
mUpdateSeq(0),
mReqFrames(reqFrames),
mMaxFrames(roundup(reqFrames)),
mBuffer(malloc(mMaxFrames * Format_frameSize(format))),
mFront(0),
mRear(0),
mWriteTsValid(false),
// mWriteTs
mSetpoint((reqFrames * 11) / 16),
mWriteCanBlock(writeCanBlock),
mIsShutdown(false)
{
CCHelper tmpHelper;
status_t res;
uint64_t N, D;
mNextRdPTS = AudioBufferProvider::kInvalidPTS;
mSamplesToLocalTime.a_zero = 0;
mSamplesToLocalTime.b_zero = 0;
mSamplesToLocalTime.a_to_b_numer = 0;
mSamplesToLocalTime.a_to_b_denom = 0;
D = Format_sampleRate(format);
if (OK != (res = tmpHelper.getLocalFreq(&N))) {
ALOGE("Failed to fetch local time frequency when constructing a"
" MonoPipe (res = %d). getNextWriteTimestamp calls will be"
" non-functional", res);
return;
}
LinearTransform::reduce(&N, &D);
static const uint64_t kSignedHiBitsMask = ~(0x7FFFFFFFull);
static const uint64_t kUnsignedHiBitsMask = ~(0xFFFFFFFFull);
if ((N & kSignedHiBitsMask) || (D & kUnsignedHiBitsMask)) {
ALOGE("Cannot reduce sample rate to local clock frequency ratio to fit"
" in a 32/32 bit rational. (max reduction is 0x%016llx/0x%016llx"
"). getNextWriteTimestamp calls will be non-functional", N, D);
return;
}
mSamplesToLocalTime.a_to_b_numer = static_cast<int32_t>(N);
mSamplesToLocalTime.a_to_b_denom = static_cast<uint32_t>(D);
}
void FastCapture::onStateChange()
{
const FastCaptureState * const current = (const FastCaptureState *) mCurrent;
const FastCaptureState * const previous = (const FastCaptureState *) mPrevious;
FastCaptureDumpState * const dumpState = (FastCaptureDumpState *) mDumpState;
const size_t frameCount = current->mFrameCount;
bool eitherChanged = false;
// check for change in input HAL configuration
NBAIO_Format previousFormat = mFormat;
if (current->mInputSourceGen != mInputSourceGen) {
mInputSource = current->mInputSource;
mInputSourceGen = current->mInputSourceGen;
if (mInputSource == NULL) {
mFormat = Format_Invalid;
mSampleRate = 0;
} else {
mFormat = mInputSource->format();
mSampleRate = Format_sampleRate(mFormat);
unsigned channelCount = Format_channelCount(mFormat);
ALOG_ASSERT(channelCount >= 1 && channelCount <= FCC_8);
}
dumpState->mSampleRate = mSampleRate;
eitherChanged = true;
}
// check for change in pipe
if (current->mPipeSinkGen != mPipeSinkGen) {
mPipeSink = current->mPipeSink;
mPipeSinkGen = current->mPipeSinkGen;
eitherChanged = true;
}
// input source and pipe sink must be compatible
if (eitherChanged && mInputSource != NULL && mPipeSink != NULL) {
ALOG_ASSERT(Format_isEqual(mFormat, mPipeSink->format()));
}
if ((!Format_isEqual(mFormat, previousFormat)) || (frameCount != previous->mFrameCount)) {
// FIXME to avoid priority inversion, don't free here
free(mReadBuffer);
mReadBuffer = NULL;
if (frameCount > 0 && mSampleRate > 0) {
// FIXME new may block for unbounded time at internal mutex of the heap
// implementation; it would be better to have normal capture thread allocate for
// us to avoid blocking here and to prevent possible priority inversion
size_t bufferSize = frameCount * Format_frameSize(mFormat);
(void)posix_memalign(&mReadBuffer, 32, bufferSize);
memset(mReadBuffer, 0, bufferSize); // if posix_memalign fails, will segv here.
mPeriodNs = (frameCount * 1000000000LL) / mSampleRate; // 1.00
mUnderrunNs = (frameCount * 1750000000LL) / mSampleRate; // 1.75
mOverrunNs = (frameCount * 500000000LL) / mSampleRate; // 0.50
mForceNs = (frameCount * 950000000LL) / mSampleRate; // 0.95
mWarmupNsMin = (frameCount * 750000000LL) / mSampleRate; // 0.75
mWarmupNsMax = (frameCount * 1250000000LL) / mSampleRate; // 1.25
} else {
mPeriodNs = 0;
mUnderrunNs = 0;
mOverrunNs = 0;
mForceNs = 0;
mWarmupNsMin = 0;
mWarmupNsMax = LONG_MAX;
}
mReadBufferState = -1;
dumpState->mFrameCount = frameCount;
}
}