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avcodec/imc: only check remaining bits in case bits will be read

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-12-04 18:17:17 +01:00
parent 291747581e
commit cbf09545f2
1 changed files with 7 additions and 6 deletions
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3
libavcodec/imc.c
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@ -803,14 +803,15 @@ static void imc_get_coeffs(AVCodecContext *avctx,
cw_len = chctx->CWlengthT[j]; cw_len = chctx->CWlengthT[j];
cw = 0; cw = 0;
if (cw_len && (!chctx->bandFlagsBuf[i] || !chctx->skipFlags[j])) {
if (get_bits_count(&q->gb) + cw_len > 512) { if (get_bits_count(&q->gb) + cw_len > 512) {
av_log(avctx, AV_LOG_WARNING, av_log(avctx, AV_LOG_WARNING,
"Potential problem on band %i, coefficient %i" "Potential problem on band %i, coefficient %i"
": cw_len=%i\n", i, j, cw_len); ": cw_len=%i\n", i, j, cw_len);
} }
if (cw_len && (!chctx->bandFlagsBuf[i] || !chctx->skipFlags[j]))
cw = get_bits(&q->gb, cw_len); cw = get_bits(&q->gb, cw_len);
}
chctx->codewords[j] = cw; chctx->codewords[j] = cw;
} }