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Add request_channels member to AVCodecContext so we now have a proper 

way to tell the decoder how many output channels we would like.

Originally committed as revision 10199 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2007-08-23 20:28:28 +00:00
parent 0e6b14c2a7
commit b1ec601f7f
3 changed files with 11 additions and 2 deletions
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11
libavcodec/avcodec.h
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@ -33,8 +33,8 @@
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVCODEC_VERSION_INT ((51<<16)+(41<<8)+0)
#define LIBAVCODEC_VERSION 51.41.0
#define LIBAVCODEC_VERSION_INT ((51<<16)+(42<<8)+0)
#define LIBAVCODEC_VERSION 51.42.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@ -2123,6 +2123,13 @@ typedef struct AVCodecContext {
* - decoding: unused
*/
int64_t timecode_frame_start;
/**
* Decoder should decode to this many channels if it can (0 for default)
* - encoding: unused
* - decoding: Set by user.
*/
int request_channels;
} AVCodecContext;
/**

1
libavcodec/dca.c
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@ -1158,6 +1158,7 @@ static int dca_decode_frame(AVCodecContext * avctx,
avctx->bit_rate = s->bit_rate;
channels = s->prim_channels + !!s->lfe;
avctx->channels = avctx->request_channels;
if(avctx->channels == 0) {
avctx->channels = channels;
} else if(channels < avctx->channels) {

1
libavcodec/utils.c
View File

@ -753,6 +753,7 @@ static const AVOption options[]={
{"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), FF_OPT_TYPE_INT, 0, 0, INT_MAX, V|E},
{"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
{"non_linear_q", "use non linear quantizer", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NON_LINEAR_QUANT, INT_MIN, INT_MAX, V|E, "flags2"},
{"request_channels", "set desired number of audio channels", OFFSET(request_channels), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|D},
{NULL},
};