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alsdec: channel sorting

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2012-12-21 12:51:08 +00:00
parent 29707f5ba6
commit ae27b70b9d
1 changed files with 13 additions and 3 deletions
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16
libavcodec/alsdec.c
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@ -355,11 +355,16 @@ static av_cold int read_specific_config(ALSDecContext *ctx)
if (!(sconf->chan_pos = av_malloc(avctx->channels * sizeof(*sconf->chan_pos))))
return AVERROR(ENOMEM);
for (i = 0; i < avctx->channels; i++)
for (i = 0; i < avctx->channels; i++) {
sconf->chan_pos[i] = get_bits(&gb, chan_pos_bits);
if (sconf->chan_pos[i] >= avctx->channels) {
av_log(avctx, AV_LOG_WARNING, "Invalid original channel position.\n");
sconf->chan_sort = 0;
break;
}
}
align_get_bits(&gb);
// TODO: use this to actually do channel sorting
} else {
sconf->chan_sort = 0;
}
@ -430,7 +435,6 @@ static int check_specific_config(ALSDecContext *ctx)
MISSING_ERR(sconf->floating, "Floating point decoding", AVERROR_PATCHWELCOME);
MISSING_ERR(sconf->rlslms, "Adaptive RLS-LMS prediction", AVERROR_PATCHWELCOME);
MISSING_ERR(sconf->chan_sort, "Channel sorting", 0);
return error;
}
@ -1480,9 +1484,15 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
{ \
int##bps##_t *dest = (int##bps##_t*)ctx->frame.data[0]; \
shift = bps - ctx->avctx->bits_per_raw_sample; \
if (!sconf->chan_sort) { \
for (sample = 0; sample < ctx->cur_frame_length; sample++) \
for (c = 0; c < avctx->channels; c++) \
*dest++ = ctx->raw_samples[c][sample] << shift; \
} else { \
for (sample = 0; sample < ctx->cur_frame_length; sample++) \
for (c = 0; c < avctx->channels; c++) \
*dest++ = ctx->raw_samples[sconf->chan_pos[c]][sample] << shift; \
} \
}
if (ctx->avctx->bits_per_raw_sample <= 16) {