Channel layouts are specified in the FLAC format description at
http://flac.sourceforge.net/format.html
---
libavcodec/flacdec.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/libavcodec/flacdec.c b/libavcodec/flacdec.c
index 58eb66d..9dd4427 100644
--- a/libavcodec/flacdec.c
+++ b/libavcodec/flacdec.c
@@ -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;
}
--
1.7.1
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