status_t Camera3OutputStream::getBufferLocked(camera3_stream_buffer *buffer) {
ATRACE_CALL();
status_t res;
if ((res = getBufferPreconditionCheckLocked()) != OK) {
return res;
}
ANativeWindowBuffer* anb;
int fenceFd;
res = mConsumer->dequeueBuffer(mConsumer.get(), &anb, &fenceFd);
if (res != OK) {
ALOGE("%s: Stream %d: Can't dequeue next output buffer: %s (%d)",
__FUNCTION__, mId, strerror(-res), res);
return res;
}
/**
* FenceFD now owned by HAL except in case of error,
* in which case we reassign it to acquire_fence
*/
handoutBufferLocked(*buffer, &(anb->handle), /*acquireFence*/fenceFd,
/*releaseFence*/-1, CAMERA3_BUFFER_STATUS_OK);
return OK;
}
status_t Camera3ZslStream::getInputBufferLocked(camera3_stream_buffer *buffer) {
ATRACE_CALL();
status_t res;
// TODO: potentially register from inputBufferLocked
// this should be ok, registerBuffersLocked only calls getBuffer for now
// register in output mode instead of input mode for ZSL streams.
if (mState == STATE_IN_CONFIG || mState == STATE_IN_RECONFIG) {
ALOGE("%s: Stream %d: Buffer registration for input streams"
" not implemented (state %d)",
__FUNCTION__, mId, mState);
return INVALID_OPERATION;
}
if ((res = getBufferPreconditionCheckLocked()) != OK) {
return res;
}
ANativeWindowBuffer* anb;
int fenceFd;
assert(mProducer != 0);
sp<PinnedBufferItem> bufferItem;
{
List<sp<RingBufferConsumer::PinnedBufferItem> >::iterator it, end;
it = mInputBufferQueue.begin();
end = mInputBufferQueue.end();
// Need to call enqueueInputBufferByTimestamp as a prerequisite
if (it == end) {
ALOGE("%s: Stream %d: No input buffer was queued",
__FUNCTION__, mId);
return INVALID_OPERATION;
}
bufferItem = *it;
mInputBufferQueue.erase(it);
}
anb = bufferItem->getBufferItem().mGraphicBuffer->getNativeBuffer();
assert(anb != NULL);
fenceFd = bufferItem->getBufferItem().mFence->dup();
/**
* FenceFD now owned by HAL except in case of error,
* in which case we reassign it to acquire_fence
*/
handoutBufferLocked(*buffer, &(anb->handle), /*acquireFence*/fenceFd,
/*releaseFence*/-1, CAMERA3_BUFFER_STATUS_OK);
mBuffersInFlight.push_back(bufferItem);
return OK;
}
status_t Camera3InputStream::getInputBufferLocked(
camera3_stream_buffer *buffer) {
ATRACE_CALL();
status_t res;
// FIXME: will not work in (re-)registration
if (mState == STATE_IN_CONFIG || mState == STATE_IN_RECONFIG) {
ALOGE("%s: Stream %d: Buffer registration for input streams"
" not implemented (state %d)",
__FUNCTION__, mId, mState);
return INVALID_OPERATION;
}
if ((res = getBufferPreconditionCheckLocked()) != OK) {
return res;
}
ANativeWindowBuffer* anb;
int fenceFd;
assert(mConsumer != 0);
BufferItem bufferItem;
res = mConsumer->acquireBuffer(&bufferItem, /*waitForFence*/false);
if (res != OK) {
ALOGE("%s: Stream %d: Can't acquire next output buffer: %s (%d)",
__FUNCTION__, mId, strerror(-res), res);
return res;
}
anb = bufferItem.mGraphicBuffer->getNativeBuffer();
assert(anb != NULL);
fenceFd = bufferItem.mFence->dup();
/**
* FenceFD now owned by HAL except in case of error,
* in which case we reassign it to acquire_fence
*/
handoutBufferLocked(*buffer, &(anb->handle), /*acquireFence*/fenceFd,
/*releaseFence*/-1, CAMERA3_BUFFER_STATUS_OK, /*output*/false);
mBuffersInFlight.push_back(bufferItem);
return OK;
}
status_t Camera3OutputStream::getBufferLocked(camera3_stream_buffer *buffer) {
ATRACE_CALL();
status_t res;
if ((res = getBufferPreconditionCheckLocked()) != OK) {
return res;
}
ANativeWindowBuffer* anb;
int fenceFd;
/**
* Release the lock briefly to avoid deadlock for below scenario:
* Thread 1: StreamingProcessor::startStream -> Camera3Stream::isConfiguring().
* This thread acquired StreamingProcessor lock and try to lock Camera3Stream lock.
* Thread 2: Camera3Stream::returnBuffer->StreamingProcessor::onFrameAvailable().
* This thread acquired Camera3Stream lock and bufferQueue lock, and try to lock
* StreamingProcessor lock.
* Thread 3: Camera3Stream::getBuffer(). This thread acquired Camera3Stream lock
* and try to lock bufferQueue lock.
* Then there is circular locking dependency.
*/
sp<ANativeWindow> currentConsumer = mConsumer;
mLock.unlock();
res = currentConsumer->dequeueBuffer(currentConsumer.get(), &anb, &fenceFd);
mLock.lock();
if (res != OK) {
ALOGE("%s: Stream %d: Can't dequeue next output buffer: %s (%d)",
__FUNCTION__, mId, strerror(-res), res);
return res;
}
/**
* FenceFD now owned by HAL except in case of error,
* in which case we reassign it to acquire_fence
*/
handoutBufferLocked(*buffer, &(anb->handle), /*acquireFence*/fenceFd,
/*releaseFence*/-1, CAMERA3_BUFFER_STATUS_OK, /*output*/true);
return OK;
}
