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avcodec/mlpdec: skip decoding substreams if their channels are not to be used

This commit is contained in:
Paul B Mahol 2021-09-06 23:56:48 +02:00
parent 114634a51a
commit 17130321f3
1 changed files with 7 additions and 0 deletions
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7
libavcodec/mlpdec.c
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@ -1249,6 +1249,12 @@ static int read_access_unit(AVCodecContext *avctx, void* data,
for (substr = 0; substr <= m->max_decoded_substream; substr++) {
SubStream *s = &m->substream[substr];
if (substr != m->max_decoded_substream &&
m->substream[m->max_decoded_substream].min_channel == 0 &&
m->substream[m->max_decoded_substream].max_channel == avctx->channels - 1)
goto skip_substr;
init_get_bits(&gb, buf, substream_data_len[substr] * 8);
m->matrix_changed = 0;
@ -1322,6 +1328,7 @@ next_substr:
av_log(m->avctx, AV_LOG_ERROR,
"No restart header present in substream %d.\n", substr);
skip_substr:
buf += substream_data_len[substr];
}