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avcodec/mpegaudiodec_template: disable CRC checking for layers 1 and 2

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Layers 1 and 2 use lengths in bits which are not a multiple of 8,
and our CRC works on a per-byte basis.

Based on b48397e7b8

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2020-08-03 10:40:10 -03:00
parent 9afd1f6ff2
commit 08f60a35b4
1 changed files with 1 additions and 1 deletions
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2
libavcodec/mpegaudiodec_template.c
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@ -1568,7 +1568,7 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples,
if (s->error_protection) {
uint16_t crc = get_bits(&s->gb, 16);
if (s->err_recognition & AV_EF_CRCCHECK) {
if (s->err_recognition & AV_EF_CRCCHECK && s->layer == 3) {
const int sec_len = s->lsf ? ((s->nb_channels == 1) ? 9 : 17) :
((s->nb_channels == 1) ? 17 : 32);
const AVCRC *crc_tab = av_crc_get_table(AV_CRC_16_ANSI);