generic-library/ffmpeg
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Set channel layout for True Audio files.

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This is not documented (and possibly not originally intended),
but it's what the current reference decoder does.
This commit is contained in:
Carl Eugen Hoyos 2011-04-29 10:46:45 +02:00
parent d2ee3c913d
commit d804784db5
1 changed files with 12 additions and 0 deletions
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12
libavcodec/tta.c
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@ -205,6 +205,16 @@ static int tta_get_unary(GetBitContext *gb)
return ret;
}
static const int64_t tta_channel_layouts[7] = {
AV_CH_LAYOUT_STEREO,
AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
AV_CH_LAYOUT_QUAD,
0,
AV_CH_LAYOUT_5POINT1_BACK,
AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
AV_CH_LAYOUT_7POINT1_WIDE
};
static av_cold int tta_decode_init(AVCodecContext * avctx)
{
TTAContext *s = avctx->priv_data;
@ -234,6 +244,8 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
}
s->is_float = (s->flags == FORMAT_FLOAT);
avctx->channels = s->channels = get_bits(&s->gb, 16);
if (s->channels > 1 && s->channels < 9)
avctx->channel_layout = tta_channel_layouts[s->channels-2];
avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
s->bps = (avctx->bits_per_coded_sample + 7) / 8;
avctx->sample_rate = get_bits_long(&s->gb, 32);