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flacdec: set channel_layout based on channel count 

Channel layouts are specified in the FLAC format description at
http://flac.sourceforge.net/format.html

fixes Bug 209
This commit is contained in:
Justin Ruggles 2012-02-09 22:44:10 -05:00
parent 3798205a77
commit 62d5f9e5ca
1 changed files with 13 additions and 0 deletions
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13
libavcodec/flacdec.c
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@ -33,6 +33,7 @@
#include <limits.h>
#include "libavutil/audioconvert.h"
#include "libavutil/crc.h"
#include "avcodec.h"
#include "internal.h"
@ -62,6 +63,15 @@ typedef struct FLACContext {
int32_t *decoded[FLAC_MAX_CHANNELS]; ///< decoded samples
} FLACContext;
static const int64_t flac_channel_layouts[6] = {
AV_CH_LAYOUT_MONO,
AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_SURROUND,
AV_CH_LAYOUT_QUAD,
AV_CH_LAYOUT_5POINT0,
AV_CH_LAYOUT_5POINT1
};
static void allocate_buffers(FLACContext *s);
int avpriv_flac_is_extradata_valid(AVCodecContext *avctx,
@ -120,6 +130,9 @@ static av_cold int flac_decode_init(AVCodecContext *avctx)
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
if (avctx->channels <= FF_ARRAY_ELEMS(flac_channel_layouts))
avctx->channel_layout = flac_channel_layouts[avctx->channels - 1];
return 0;
}