status_t Camera3Stream::returnBuffer(const camera3_stream_buffer &buffer,
nsecs_t timestamp) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
// Check if this buffer is outstanding.
if (!isOutstandingBuffer(buffer)) {
ALOGE("%s: Stream %d: Returning an unknown buffer.", __FUNCTION__, mId);
return BAD_VALUE;
}
/**
* TODO: Check that the state is valid first.
*
* <HAL3.2 IN_CONFIG and IN_RECONFIG in addition to CONFIGURED.
* >= HAL3.2 CONFIGURED only
*
* Do this for getBuffer as well.
*/
status_t res = returnBufferLocked(buffer, timestamp);
if (res == OK) {
fireBufferListenersLocked(buffer, /*acquired*/false, /*output*/true);
}
// Even if returning the buffer failed, we still want to signal whoever is waiting for the
// buffer to be returned.
mOutputBufferReturnedSignal.signal();
removeOutstandingBuffer(buffer);
return res;
}
status_t Camera3Stream::returnInputBuffer(const camera3_stream_buffer &buffer) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
status_t res = returnInputBufferLocked(buffer);
if (res == OK) {
fireBufferListenersLocked(buffer, /*acquired*/false, /*output*/false);
}
return res;
}
status_t Camera3Stream::getBuffer(camera3_stream_buffer *buffer) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
status_t res = getBufferLocked(buffer);
if (res == OK) {
fireBufferListenersLocked(*buffer, /*acquired*/true, /*output*/true);
}
return res;
}
status_t Camera3Stream::returnInputBuffer(const camera3_stream_buffer &buffer) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
// Check if this buffer is outstanding.
if (!isOutstandingBuffer(buffer)) {
ALOGE("%s: Stream %d: Returning an unknown buffer.", __FUNCTION__, mId);
return BAD_VALUE;
}
status_t res = returnInputBufferLocked(buffer);
if (res == OK) {
fireBufferListenersLocked(buffer, /*acquired*/false, /*output*/false);
mInputBufferReturnedSignal.signal();
}
removeOutstandingBuffer(buffer);
return res;
}
status_t Camera3Stream::getBuffer(camera3_stream_buffer *buffer) {
ATRACE_CALL();
Mutex::Autolock l(mLock);
status_t res = OK;
// This function should be only called when the stream is configured already.
if (mState != STATE_CONFIGURED) {
ALOGE("%s: Stream %d: Can't get buffers if stream is not in CONFIGURED state %d",
__FUNCTION__, mId, mState);
return INVALID_OPERATION;
}
// Wait for new buffer returned back if we are running into the limit.
if (getHandoutOutputBufferCountLocked() == camera3_stream::max_buffers) {
ALOGV("%s: Already dequeued max output buffers (%d), wait for next returned one.",
__FUNCTION__, camera3_stream::max_buffers);
res = mOutputBufferReturnedSignal.waitRelative(mLock, kWaitForBufferDuration);
if (res != OK) {
if (res == TIMED_OUT) {
ALOGE("%s: wait for output buffer return timed out after %lldms (max_buffers %d)",
__FUNCTION__, kWaitForBufferDuration / 1000000LL,
camera3_stream::max_buffers);
}
return res;
}
}
res = getBufferLocked(buffer);
if (res == OK) {
fireBufferListenersLocked(*buffer, /*acquired*/true, /*output*/true);
if (buffer->buffer) {
mOutstandingBuffers.push_back(*buffer->buffer);
}
}
return res;
}