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fftools/ffmpeg_opt: add helpers to match stream groups

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Will be used to check for specifiers that match a given stream group and not
a stream within one.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer
2025-10-18 20:46:14 -03:00
parent 7b18beb477
commit ba0dc3d49e
4 changed files with 174 additions and 0 deletions
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71
fftools/cmdutils.c
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@@ -1350,6 +1350,77 @@ int check_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
return ret;
}
unsigned stream_group_specifier_match(const StreamSpecifier *ss,
const AVFormatContext *s, const AVStreamGroup *stg,
void *logctx)
{
int start_stream_group = 0, nb_stream_groups;
int nb_matched = 0;
if (ss->idx >= 0)
return 0;
switch (ss->stream_list) {
case STREAM_LIST_STREAM_ID:
case STREAM_LIST_ALL:
case STREAM_LIST_PROGRAM:
return 0;
case STREAM_LIST_GROUP_ID:
// <n-th> stream with given ID makes no sense and should be impossible to request
av_assert0(ss->idx < 0);
// return early if we know for sure the stream does not match
if (stg->id != ss->list_id)
return 0;
start_stream_group = stg->index;
nb_stream_groups = stg->index + 1;
break;
case STREAM_LIST_GROUP_IDX:
start_stream_group = ss->list_id >= 0 ? 0 : stg->index;
nb_stream_groups = stg->index + 1;
break;
default: av_assert0(0);
}
for (int i = start_stream_group; i < nb_stream_groups; i++) {
const AVStreamGroup *candidate = s->stream_groups[i];
if (ss->meta_key) {
const AVDictionaryEntry *tag = av_dict_get(candidate->metadata,
ss->meta_key, NULL, 0);
if (!tag)
continue;
if (ss->meta_val && strcmp(tag->value, ss->meta_val))
continue;
}
if (ss->usable_only) {
switch (candidate->type) {
case AV_STREAM_GROUP_PARAMS_TILE_GRID: {
const AVStreamGroupTileGrid *tg = candidate->params.tile_grid;
if (!tg->coded_width || !tg->coded_height || !tg->nb_tiles ||
!tg->width || !tg->height || !tg->nb_tiles)
continue;
break;
}
default:
continue;
}
}
if (ss->disposition &&
(candidate->disposition & ss->disposition) != ss->disposition)
continue;
if (stg == candidate)
return ss->list_id < 0 || ss->list_id == nb_matched;
nb_matched++;
}
return 0;
}
int filter_codec_opts(const AVDictionary *opts, enum AVCodecID codec_id,
AVFormatContext *s, AVStream *st, const AVCodec *codec,
AVDictionary **dst, AVDictionary **opts_used)