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aacsbr: Fix memory corruption.

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Fixes Ticket760 and Ticket761
Bug Found by: Diana Elena Muscalu

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-12-15 03:59:29 +01:00
parent 7fff64e00d
commit 944f5b2779
1 changed files with 1 additions and 1 deletions
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2
libavcodec/aacsbr.c
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@ -1187,7 +1187,7 @@ static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
const float *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us;
float *v;
for (i = 0; i < 32; i++) {
if (*v_off == 0) {
if (*v_off < 128 >> div) {
int saved_samples = (1280 - 128) >> div;
memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(float));
*v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - (128 >> div);