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aacenc: Only apply M/S if common_window is set.

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Originally committed as revision 24998 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse 2010-08-30 23:43:03 +00:00
parent 4ca31edcfe
commit 76dfe4ebc5
1 changed files with 1 additions and 1 deletions
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2
libavcodec/aacenc.c
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@ -313,7 +313,7 @@ static void adjust_frame_information(AACEncContext *apc, ChannelElement *cpe, in
for (g = 0; g < ics->num_swb; g++) {
sum = 0;
//apply M/S
if (!ch && cpe->ms_mask[w + g]) {
if (cpe->common_window && !ch && cpe->ms_mask[w + g]) {
for (i = 0; i < ics->swb_sizes[g]; i++) {
cpe->ch[0].coeffs[start+i] = (cpe->ch[0].coeffs[start+i] + cpe->ch[1].coeffs[start+i]) / 2.0;
cpe->ch[1].coeffs[start+i] = cpe->ch[0].coeffs[start+i] - cpe->ch[1].coeffs[start+i];