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Perform dequantization of channel coefficients

This commit is contained in:
Mashiat Sarker Shakkhar 2011-12-23 13:21:33 +06:00
parent cf6284b273
commit 70dd5a603c
1 changed files with 7 additions and 2 deletions
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9
libavcodec/wmalosslessdec.c
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@ -1052,10 +1052,11 @@ static int decode_subframe(WmallDecodeCtx *s)
{
int offset = s->samples_per_frame;
int subframe_len = s->samples_per_frame;
int i;
int i, j;
int total_samples = s->samples_per_frame * s->num_channels;
int rawpcm_tile;
int padding_zeroes;
int quant_stepsize = s->quant_stepsize;
s->subframe_offset = get_bits_count(&s->gb);
@ -1155,7 +1156,6 @@ static int decode_subframe(WmallDecodeCtx *s)
if(rawpcm_tile) {
int bits = s->bits_per_sample - padding_zeroes;
int j;
dprintf(s->avctx, "RAWPCM %d bits per sample. total %d bits, remain=%d\n", bits,
bits * s->num_channels * subframe_len, get_bits_count(&s->gb));
for(i = 0; i < s->num_channels; i++) {
@ -1182,6 +1182,11 @@ static int decode_subframe(WmallDecodeCtx *s)
if(s->do_ac_filter)
revert_acfilter(s, subframe_len);
/* Dequantize */
for (i = 0; i < s->num_channels; i++)
for (j = 0; j < subframe_len; j++)
s->channel_residues[i][j] *= quant_stepsize;
/** handled one subframe */
for (i = 0; i < s->channels_for_cur_subframe; i++) {