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Introduce optional pull-based API for video data

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This commit is contained in:
Cameron Gutman 2021-06-13 15:14:38 -05:00
commit 68c784445c
6 changed files with 81 additions and 19 deletions
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51
src/VideoDepacketizer.c
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@ -117,7 +117,7 @@ static void freeDecodeUnitList(PLINKED_BLOCKING_QUEUE_ENTRY entry) {
nextEntry = entry->flink;
// Complete this with a failure status
completeQueuedDecodeUnit((PQUEUED_DECODE_UNIT)entry->data, DR_CLEANUP);
LiCompleteVideoFrame(entry->data, DR_CLEANUP);
entry = nextEntry;
}
@ -181,16 +181,53 @@ static bool getSpecialSeq(PBUFFER_DESC current, PBUFFER_DESC candidate) {
return false;
}
// Get the first decode unit available
bool getNextQueuedDecodeUnit(PQUEUED_DECODE_UNIT* qdu) {
int err = LbqWaitForQueueElement(&decodeUnitQueue, (void**)qdu);
return (err == LBQ_SUCCESS);
bool LiWaitForNextVideoFrame(VIDEO_FRAME_HANDLE* frameHandle, PDECODE_UNIT* decodeUnit) {
PQUEUED_DECODE_UNIT qdu;
int err = LbqWaitForQueueElement(&decodeUnitQueue, (void**)&qdu);
if (err != LBQ_SUCCESS) {
return false;
}
*frameHandle = qdu;
*decodeUnit = &qdu->decodeUnit;
return true;
}
bool LiPollNextVideoFrame(VIDEO_FRAME_HANDLE* frameHandle, PDECODE_UNIT* decodeUnit) {
PQUEUED_DECODE_UNIT qdu;
int err = LbqPollQueueElement(&decodeUnitQueue, (void**)&qdu);
if (err != LBQ_SUCCESS) {
return false;
}
*frameHandle = qdu;
*decodeUnit = &qdu->decodeUnit;
return true;
}
bool LiPeekNextVideoFrame(PDECODE_UNIT* decodeUnit) {
PQUEUED_DECODE_UNIT qdu;
int err = LbqPeekQueueElement(&decodeUnitQueue, (void**)&qdu);
if (err != LBQ_SUCCESS) {
return false;
}
*decodeUnit = &qdu->decodeUnit;
return true;
}
// Cleanup a decode unit by freeing the buffer chain and the holder
void completeQueuedDecodeUnit(PQUEUED_DECODE_UNIT qdu, int drStatus) {
void LiCompleteVideoFrame(VIDEO_FRAME_HANDLE handle, int drStatus) {
PQUEUED_DECODE_UNIT qdu = handle;
PLENTRY_INTERNAL lastEntry;
if (qdu->decodeUnit.frameType == FRAME_TYPE_IDR) {
notifyKeyFrameReceived();
}
if (drStatus == DR_NEED_IDR) {
Limelog("Requesting IDR frame on behalf of DR\n");
requestDecoderRefresh();
@ -353,7 +390,7 @@ static void reassembleFrame(int frameNumber) {
}
else {
// Submit the frame to the decoder
submitFrame(qdu);
LiCompleteVideoFrame(qdu, VideoCallbacks.submitDecodeUnit(&qdu->decodeUnit));
}
// Notify the control connection