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author | Ho Ming Shun <cyph1984@gmail.com> | 2021-09-24 17:04:35 +0800 |
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committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2021-12-12 16:54:43 +0100 |
commit | b54377b3a7cd427bc121af003f12c36a32169a74 (patch) | |
tree | 481e489af43c65ecc2ee9675b5c9ed28851aed16 /libavcodec/snowdec.c | |
parent | 996b13fac4810efc35ff988f523f0c88a3b57ec9 (diff) | |
download | ffmpeg-b54377b3a7cd427bc121af003f12c36a32169a74.tar.gz |
avcodec/mmaldec: use decoupled dataflow
MMAL is an fundamentally an asynchronous decoder, which was a bad fit
for the legacy dataflow API. Often multiple packets are enqueued before
a flood of frames are returned from MMAL.
The previous lockstep dataflow meant that any delay in returning packets
from the VPU would cause ctx->queue_decoded_frames to grow with no way
of draining the queue.
Testing this with mpv streaming from a live RTSP source visibly reduced
latency introduced by frames waiting in queue_decoded_frames from
roughly 2s to 0.
Tested-by: Cameron Gutman <aicommander@gmail.com>
Signed-off-by: Ho Ming Shun <cyph1984@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Diffstat (limited to 'libavcodec/snowdec.c')
0 files changed, 0 insertions, 0 deletions