size_t StaticAudioTrackServerProxy::framesReady()
{
// Can't call pollPosition() from multiple threads.
if (!mFramesReadyIsCalledByMultipleThreads) {
(void) pollPosition();
}
return mFramesReadySafe;
}
size_t StaticAudioTrackServerProxy::framesReady()
{
// FIXME
// This is racy if called by normal mixer thread,
// as we're reading 2 independent variables without a lock.
// Can't call mObserver.poll(), as we might be called from wrong thread.
// If looping is enabled, should return a higher number (since includes non-contiguous).
size_t position = mPosition;
if (!mFramesReadyIsCalledByMultipleThreads) {
ssize_t positionOrStatus = pollPosition();
if (positionOrStatus >= 0) {
position = (size_t) positionOrStatus;
}
}
size_t end = mEnd;
return position < end ? end - position : 0;
}
status_t StaticAudioTrackServerProxy::obtainBuffer(Buffer* buffer, bool ackFlush __unused)
{
if (mIsShutdown) {
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
buffer->mNonContig = 0;
mUnreleased = 0;
return NO_INIT;
}
ssize_t positionOrStatus = pollPosition();
if (positionOrStatus < 0) {
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
buffer->mNonContig = 0;
mUnreleased = 0;
return (status_t) positionOrStatus;
}
size_t position = (size_t) positionOrStatus;
size_t end = mState.mLoopCount != 0 ? mState.mLoopEnd : mFrameCount;
size_t avail;
if (position < end) {
avail = end - position;
size_t wanted = buffer->mFrameCount;
if (avail < wanted) {
buffer->mFrameCount = avail;
} else {
avail = wanted;
}
buffer->mRaw = &((char *) mBuffers)[position * mFrameSize];
} else {
avail = 0;
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
}
// As mFramesReady is the total remaining frames in the static audio track,
// it is always larger or equal to avail.
LOG_ALWAYS_FATAL_IF(mFramesReady < (int64_t) avail);
buffer->mNonContig = mFramesReady == INT64_MAX ? SIZE_MAX : clampToSize(mFramesReady - avail);
mUnreleased = avail;
return NO_ERROR;
}
status_t StaticAudioTrackServerProxy::obtainBuffer(Buffer* buffer, bool ackFlush)
{
if (mIsShutdown) {
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
buffer->mNonContig = 0;
mUnreleased = 0;
return NO_INIT;
}
ssize_t positionOrStatus = pollPosition();
if (positionOrStatus < 0) {
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
buffer->mNonContig = 0;
mUnreleased = 0;
return (status_t) positionOrStatus;
}
size_t position = (size_t) positionOrStatus;
size_t avail;
if (position < mEnd) {
avail = mEnd - position;
size_t wanted = buffer->mFrameCount;
if (avail < wanted) {
buffer->mFrameCount = avail;
} else {
avail = wanted;
}
buffer->mRaw = &((char *) mBuffers)[position * mFrameSize];
} else {
avail = 0;
buffer->mFrameCount = 0;
buffer->mRaw = NULL;
}
buffer->mNonContig = 0; // FIXME should be > 0 for looping
mUnreleased = avail;
return NO_ERROR;
}