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mp3dec: perform I/S and M/S only when frame mode is joint stereo.

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Looks like some LAME versions produce dual stereo mode MP3s with
flags for intensity and middle stereo set. In this mode those flags
should be ignored like the reference decoder and derived ones do.
This commit is contained in:
Kostya Shishkov
2012-03-29 12:08:07 +02:00
parent f704eb612b
commit a05c41acd1
1 changed files with 1 additions and 1 deletions
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libavcodec/mpegaudiodec.c
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@ -1533,7 +1533,7 @@ static int mp_decode_layer3(MPADecodeContext *s)
huffman_decode(s, g, exponents, bits_pos + g->part2_3_length); huffman_decode(s, g, exponents, bits_pos + g->part2_3_length);
} /* ch */ } /* ch */
if (s->nb_channels == 2) if (s->mode == MPA_JSTEREO)
compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]); compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]);
for (ch = 0; ch < s->nb_channels; ch++) { for (ch = 0; ch < s->nb_channels; ch++) {