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adpcm: Avoid reading out of bounds in the IMA QT trellis encoder 

This was broken in 095be4fb - samples+ch (for the previous
non-planar case) equals &samples_p[ch][0]. The confusion
probably stemmed from the IMA WAV case where it originally
was &samples[avctx->channels + ch], which was correctly
changed into &samples_p[ch][1].

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2014-06-05 11:48:53 +03:00
parent 103243ca64
commit 3d79d0c93e
1 changed files with 1 additions and 1 deletions
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2
libavcodec/adpcmenc.c
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@ -549,7 +549,7 @@ static int adpcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
put_bits(&pb, 7, status->step_index);
if (avctx->trellis > 0) {
uint8_t buf[64];
adpcm_compress_trellis(avctx, &samples_p[ch][1], buf, status,
adpcm_compress_trellis(avctx, &samples_p[ch][0], buf, status,
64, 1);
for (i = 0; i < 64; i++)
put_bits(&pb, 4, buf[i ^ 1]);