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fftools/ffmpeg: refactor disabling decoder threading for attached pictures

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* as this decision is based on demuxing information, move it from the
  decoder to the demuxer
* as the issue being addressed is latency added by frame threading, we
  only need to disable frame threading, not all threading
This commit is contained in:
Anton Khirnov 2024-01-17 10:53:19 +01:00
parent 474ca6c71e
commit a938f47916
2 changed files with 5 additions and 3 deletions
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3
fftools/ffmpeg_dec.c
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@ -960,9 +960,6 @@ int dec_open(InputStream *ist, Scheduler *sch, unsigned sch_idx,
if (!av_dict_get(*dec_opts, "threads", NULL, 0))
av_dict_set(dec_opts, "threads", "auto", 0);
/* Attached pics are sparse, therefore we would not want to delay their decoding till EOF. */
if (ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC)
av_dict_set(dec_opts, "threads", "1", 0);
av_dict_set(dec_opts, "flags", "+copy_opaque", AV_DICT_MULTIKEY);

5
fftools/ffmpeg_demux.c
View File

@ -1259,6 +1259,11 @@ static int ist_add(const OptionsContext *o, Demuxer *d, AVStream *st)
if (o->bitexact)
av_dict_set(&ist->decoder_opts, "flags", "+bitexact", AV_DICT_MULTIKEY);
/* Attached pics are sparse, therefore we would not want to delay their decoding
* till EOF. */
if (ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC)
av_dict_set(&ist->decoder_opts, "thread_type", "-frame", 0);
switch (par->codec_type) {
case AVMEDIA_TYPE_VIDEO:
MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);