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Code Issues Releases Activity

avcodec/wmalosslessdec: fix decoding of raw pcm tiles

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
2016-04-30 19:48:57 +02:00
parent 675cfb2f86
commit a67816bcce
1 changed files with 21 additions and 18 deletions
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39
libavcodec/wmalosslessdec.c
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@@ -172,8 +172,6 @@ typedef struct WmallDecodeCtx {
int lpc_order;
int lpc_scaling;
int lpc_intbits;
int channel_coeffs[WMALL_MAX_CHANNELS][WMALL_BLOCK_MAX_SIZE];
} WmallDecodeCtx;
/** Get sign of integer (1 for positive, -1 for negative and 0 for zero) */
@@ -897,14 +895,17 @@ static int decode_subframe(WmallDecodeCtx *s)
s->quant_stepsize = get_bits(&s->gb, 8) + 1;
reset_codec(s);
} else if (!s->cdlms[0][0].order) {
}
rawpcm_tile = get_bits1(&s->gb);
if (!rawpcm_tile && !s->cdlms[0][0].order) {
av_log(s->avctx, AV_LOG_DEBUG,
"Waiting for seekable tile\n");
av_frame_unref(s->frame);
return -1;
}
rawpcm_tile = get_bits1(&s->gb);
for (i = 0; i < s->num_channels; i++)
s->is_channel_coded[i] = 1;
@@ -943,9 +944,9 @@ static int decode_subframe(WmallDecodeCtx *s)
bits * s->num_channels * subframe_len, get_bits_count(&s->gb));
for (i = 0; i < s->num_channels; i++)
for (j = 0; j < subframe_len; j++)
s->channel_coeffs[i][j] = get_sbits_long(&s->gb, bits);
s->channel_residues[i][j] = get_sbits_long(&s->gb, bits);
} else {
for (i = 0; i < s->num_channels; i++)
for (i = 0; i < s->num_channels; i++) {
if (s->is_channel_coded[i]) {
decode_channel_residues(s, i, subframe_len);
if (s->seekable_tile)
@@ -956,19 +957,21 @@ static int decode_subframe(WmallDecodeCtx *s)
} else {
memset(s->channel_residues[i], 0, sizeof(**s->channel_residues) * subframe_len);
}
}
if (s->do_mclms)
revert_mclms(s, subframe_len);
if (s->do_inter_ch_decorr)
revert_inter_ch_decorr(s, subframe_len);
if (s->do_ac_filter)
revert_acfilter(s, subframe_len);
}
/* Dequantize */
if (s->quant_stepsize != 1)
for (i = 0; i < s->num_channels; i++)
for (j = 0; j < subframe_len; j++)
s->channel_residues[i][j] *= s->quant_stepsize;
if (s->do_mclms)
revert_mclms(s, subframe_len);
if (s->do_inter_ch_decorr)
revert_inter_ch_decorr(s, subframe_len);
if (s->do_ac_filter)
revert_acfilter(s, subframe_len);
/* Dequantize */
if (s->quant_stepsize != 1)
for (i = 0; i < s->num_channels; i++)
for (j = 0; j < subframe_len; j++)
s->channel_residues[i][j] *= s->quant_stepsize;
}
/* Write to proper output buffer depending on bit-depth */
for (i = 0; i < s->channels_for_cur_subframe; i++) {