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Fix multi-channel encoding with libfaac.

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This commit is contained in:
Carl Eugen Hoyos 2012-01-25 03:51:49 +01:00
parent 749e5dc1fd
commit 7988dd1b9a
1 changed files with 10 additions and 0 deletions
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10
libavcodec/libfaac.c
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@ -31,6 +31,13 @@ typedef struct FaacAudioContext {
faacEncHandle faac_handle; faacEncHandle faac_handle;
} FaacAudioContext; } FaacAudioContext;
static const int channel_maps[][6] = {
{ 2, 0, 1 }, //< C L R
{ 2, 0, 1, 3 }, //< C L R Cs
{ 2, 0, 1, 3, 4 }, //< C L R Ls Rs
{ 2, 0, 1, 4, 5, 3 }, //< C L R Ls Rs LFE
};
static av_cold int Faac_encode_init(AVCodecContext *avctx) static av_cold int Faac_encode_init(AVCodecContext *avctx)
{ {
FaacAudioContext *s = avctx->priv_data; FaacAudioContext *s = avctx->priv_data;
@ -86,6 +93,9 @@ static av_cold int Faac_encode_init(AVCodecContext *avctx)
} }
faac_cfg->outputFormat = 1; faac_cfg->outputFormat = 1;
faac_cfg->inputFormat = FAAC_INPUT_16BIT; faac_cfg->inputFormat = FAAC_INPUT_16BIT;
if (avctx->channels > 2)
memcpy(faac_cfg->channel_map, channel_maps[avctx->channels-3],
avctx->channels * sizeof(int));
avctx->frame_size = samples_input / avctx->channels; avctx->frame_size = samples_input / avctx->channels;