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fftools/ffmpeg_filter: split finding an unused stream into a function

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Avoids filtering code from digging in demuxer internals.
This commit is contained in:
Anton Khirnov 2023-05-11 10:40:58 +02:00
parent 8c0f516133
commit ede6794d6a
3 changed files with 16 additions and 7 deletions
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5
fftools/ffmpeg.h
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@ -882,6 +882,11 @@ int ifile_get_packet(InputFile *f, AVPacket **pkt);
void ist_output_add(InputStream *ist, OutputStream *ost);
void ist_filter_add(InputStream *ist, InputFilter *ifilter, int is_simple);
/**
* Find an unused input stream of given type.
*/
InputStream *ist_find_unused(enum AVMediaType type);
/* iterate over all input streams in all input files;
* pass NULL to start iteration */
InputStream *ist_iter(InputStream *prev);

10
fftools/ffmpeg_demux.c
View File

@ -130,6 +130,16 @@ static Demuxer *demuxer_from_ifile(InputFile *f)
return (Demuxer*)f;
}
InputStream *ist_find_unused(enum AVMediaType type)
{
for (InputStream *ist = ist_iter(NULL); ist; ist = ist_iter(ist)) {
if (ist->par->codec_type == type && ist->discard &&
ist->user_set_discard != AVDISCARD_ALL)
return ist;
}
return NULL;
}
static void report_new_stream(Demuxer *d, const AVPacket *pkt)
{
AVStream *st = d->f.ctx->streams[pkt->stream_index];

8
fftools/ffmpeg_filter.c
View File

@ -420,13 +420,7 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
exit_program(1);
}
} else {
/* find the first unused stream of corresponding type */
for (ist = ist_iter(NULL); ist; ist = ist_iter(ist)) {
if (ist->user_set_discard == AVDISCARD_ALL)
continue;
if (ist->dec_ctx->codec_type == type && ist->discard)
break;
}
ist = ist_find_unused(type);
if (!ist) {
av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
"unlabeled input pad %d on filter %s\n", in->pad_idx,