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Setup correct channel value when downmixing is required. 

Patch by Nick Brereton

Originally committed as revision 24554 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Nick Brereton 2010-07-27 21:44:09 +00:00 committed by Benjamin Larsson
parent af0554e530
commit 08634e7bda
1 changed files with 6 additions and 5 deletions
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11
libavcodec/dca.c
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@ -1348,7 +1348,7 @@ static int dca_decode_frame(AVCodecContext * avctx,
avctx->channel_layout = dca_core_channel_layout[s->amode];
if (s->xch_present && (!avctx->request_channels ||
avctx->request_channels > num_core_channels)) {
avctx->request_channels > num_core_channels + !!s->lfe)) {
avctx->channel_layout |= CH_BACK_CENTER;
if (s->lfe) {
avctx->channel_layout |= CH_LOW_FREQUENCY;
@ -1357,6 +1357,8 @@ static int dca_decode_frame(AVCodecContext * avctx,
s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
}
} else {
channels = num_core_channels + !!s->lfe;
s->xch_present = 0; /* disable further xch processing */
if (s->lfe) {
avctx->channel_layout |= CH_LOW_FREQUENCY;
s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
@ -1364,8 +1366,8 @@ static int dca_decode_frame(AVCodecContext * avctx,
s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
}
if (s->prim_channels > 0 &&
s->channel_order_tab[s->prim_channels - 1] < 0)
if (channels > !!s->lfe &&
s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
return -1;
if (avctx->request_channels == 2 && s->prim_channels > 2) {
@ -1384,8 +1386,7 @@ static int dca_decode_frame(AVCodecContext * avctx,
unset. Ideally during the first probe for channels the crc should be checked
and only set avctx->channels when the crc is ok. Right now the decoder could
set the channels based on a broken first frame.*/
if (!avctx->channels)
avctx->channels = channels;
avctx->channels = channels;
if (*data_size < (s->sample_blocks / 8) * 256 * sizeof(int16_t) * channels)
return -1;