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Add low-latency stream signaling to VideoFrame and VCMTiming

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This is the first CL out of three to make the low-latency stream signaling
explicit. At the moment this is done by setting the render time to 0.
There's a dependency between Chromium and WebRTC which is why this is
split into three CLs to not break any existing functionality.

Bug: chromium:1327251
Change-Id: Ie6b268746d587a99334485db77181fb2c6e9b567
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/264502
Reviewed-by: Evan Shrubsole <eshr@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Johannes Kron <kron@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37225}
This commit is contained in:
Johannes Kron
2022-06-15 12:27:23 +02:00
committed by WebRTC LUCI CQ
parent ca0c54dd96
commit bbf639e930
10 changed files with 189 additions and 53 deletions
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15
modules/video_coding/generic_decoder.cc
View File

@ -104,17 +104,14 @@ void VCMDecodedFrameCallback::Decoded(VideoFrame& decodedImage,
decodedImage.set_ntp_time_ms(frameInfo->ntp_time_ms);
decodedImage.set_packet_infos(frameInfo->packet_infos);
decodedImage.set_rotation(frameInfo->rotation);
absl::optional<int> max_composition_delay_in_frames =
_timing->MaxCompositionDelayInFrames();
if (max_composition_delay_in_frames) {
VideoFrame::RenderParameters render_parameters = _timing->RenderParameters();
if (render_parameters.max_composition_delay_in_frames) {
// Subtract frames that are in flight.
*max_composition_delay_in_frames -= timestamp_map_size;
*max_composition_delay_in_frames =
std::max(0, *max_composition_delay_in_frames);
decodedImage.set_max_composition_delay_in_frames(
max_composition_delay_in_frames);
render_parameters.max_composition_delay_in_frames =
std::max(0, *render_parameters.max_composition_delay_in_frames -
timestamp_map_size);
}
decodedImage.set_render_parameters(render_parameters);
RTC_DCHECK(frameInfo->decodeStart);
const Timestamp now = _clock->CurrentTime();