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enable multichannel output in dca decoder.

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Subject: [Ffmpeg-devel] [PATCH] DTS multichannel
Date: Wed, 25 Apr 2007 16:25:18 -0400

Originally committed as revision 8874 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2007-05-02 20:31:32 +00:00
parent c95d406d32
commit cc82662662
1 changed files with 19 additions and 3 deletions
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22
libavcodec/dca.c
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@ -285,7 +285,8 @@ static int dca_parse_frame_header(DCAContext * s)
s->dialog_norm = get_bits(&s->gb, 4);
/* FIXME: channels mixing levels */
s->output = DCA_STEREO;
s->output = s->amode;
if(s->lfe) s->output |= DCA_LFE;
#ifdef TRACE
av_log(s->avctx, AV_LOG_DEBUG, "frame type: %i\n", s->frame_type);
@ -1143,10 +1144,25 @@ static int dca_decode_frame(AVCodecContext * avctx,
}
//set AVCodec values with parsed data
avctx->sample_rate = s->sample_rate;
avctx->channels = 2; //FIXME
avctx->bit_rate = s->bit_rate;
channels = dca_channels[s->output];
channels = s->prim_channels + !!s->lfe;
if(avctx->channels == 0) {
avctx->channels = channels;
} else if(channels < avctx->channels) {
av_log(avctx, AV_LOG_WARNING, "DTS source channels are less than "
"specified: output to %d channels.\n", channels);
avctx->channels = channels;
}
if(avctx->channels == 2) {
s->output = DCA_STEREO;
} else if(avctx->channels != channels) {
av_log(avctx, AV_LOG_ERROR, "Cannot downmix DTS to %d channels.\n",
avctx->channels);
return -1;
}
channels = avctx->channels;
if(*data_size < (s->sample_blocks / 8) * 256 * sizeof(int16_t) * channels)
return -1;
*data_size = 0;