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LibVideo: Allow the VP9 decoder to queue multiple frames

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Frames will now be queued for retrieval by the user of the decoder.
When the end of the current queue is reached, a DecoderError of
category NeedsMoreInput will be emitted, allowing the caller to react
by displaying what was previously retrieved for sending more samples.
This commit is contained in:
Zaggy1024 2022-11-03 19:18:38 -05:00 • committed by Andrew Kaster
parent 993385f18d
commit 72ed286e16
5 changed files with 76 additions and 39 deletions
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25
Userland/Libraries/LibVideo/PlaybackManager.cpp
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@ -195,6 +195,11 @@ void PlaybackManager::restart_playback()
on_decoder_error(result.release_error());
}
void PlaybackManager::post_decoder_error(DecoderError error)
{
m_main_loop.post_event(*this, make<DecoderErrorEvent>(error));
}
bool PlaybackManager::decode_and_queue_one_sample()
{
if (m_frame_queue->size() >= FRAME_BUFFER_COUNT)
@ -215,9 +220,25 @@ bool PlaybackManager::decode_and_queue_one_sample()
})
auto frame_sample = TRY_OR_ENQUEUE_ERROR(m_demuxer->get_next_video_sample_for_track(m_selected_video_track));
OwnPtr<VideoFrame> decoded_frame = nullptr;
while (!decoded_frame) {
TRY_OR_ENQUEUE_ERROR(m_decoder->receive_sample(frame_sample->data()));
TRY_OR_ENQUEUE_ERROR(m_decoder->receive_sample(frame_sample->data()));
auto decoded_frame = TRY_OR_ENQUEUE_ERROR(m_decoder->get_decoded_frame());
while (true) {
auto frame_result = m_decoder->get_decoded_frame();
if (frame_result.is_error()) {
if (frame_result.error().category() == DecoderErrorCategory::NeedsMoreInput)
break;
post_decoder_error(frame_result.release_error());
return false;
}
decoded_frame = frame_result.release_value();
VERIFY(decoded_frame);
}
}
auto& cicp = decoded_frame->cicp();
cicp.adopt_specified_values(frame_sample->container_cicp());