+static int match_streams(AVFormatContext *avf)
+{
+ ConcatContext *cat = avf->priv_data;
+ ConcatStream *map;
+ int i, ret;
+
+ if (cat->cur_file->nb_streams >= cat->avf->nb_streams)
+ return 0;
+ map = av_realloc(cat->cur_file->streams,
+ cat->avf->nb_streams * sizeof(*map));
+ if (!map)
+ return AVERROR(ENOMEM);
+ cat->cur_file->streams = map;
+
+ for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++)
+ map[i].out_stream_index = -1;
+ switch (cat->stream_match_mode) {
+ case MATCH_ONE_TO_ONE:
+ ret = match_streams_one_to_one(avf);
+ break;
+ case MATCH_EXACT_ID:
+ ret = match_streams_exact_id(avf);
+ break;
+ default:
+ ret = AVERROR_BUG;
+ }
+ if (ret < 0)
+ return ret;