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avcodec/dcadec: Check dca_dmixtable index 

Found-by: Niels Möller <nisse@lysator.liu.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-06-04 22:13:39 +02:00
parent 47313bbb5f
commit 98ff07d1c6
1 changed files with 10 additions and 0 deletions
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10
libavcodec/dcadec.c
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@ -601,6 +601,12 @@ static int dca_parse_audio_coding_header(DCAContext *s, int base_channel,
if (get_bits1(&s->gb)) {
embedded_downmix = get_bits1(&s->gb);
coeff = get_bits(&s->gb, 6);
if (coeff<1 || coeff>61) {
av_log(s->avctx, AV_LOG_ERROR, "6bit coeff %d is out of range\n", coeff);
return AVERROR_INVALIDDATA;
}
scale_factor = -1.0f / dca_dmix_code((coeff<<2)-3);
s->xxch_dmix_sf[s->xxch_chset] = scale_factor;
@ -622,6 +628,10 @@ static int dca_parse_audio_coding_header(DCAContext *s, int base_channel,
coeff = get_bits(&s->gb, 7);
ichan = dca_xxch2index(s, 1 << i);
if ((coeff&63)<1 || (coeff&63)>61) {
av_log(s->avctx, AV_LOG_ERROR, "7bit coeff %d is out of range\n", coeff);
return AVERROR_INVALIDDATA;
}
s->xxch_dmix_coeff[j][ichan] = dca_dmix_code((coeff<<2)-3);
}
}