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bink: permute Bink version 'b' quant matrices by inverse scan order 

This fixes visual glitches in Bink version 'b' files, as the quantization
tables were not being permuted.

Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 2315392174)
This commit is contained in:
Peter Ross 2011-02-13 09:36:29 +00:00 committed by Michael Niedermayer
parent a093650b6c
commit f20886e464
1 changed files with 9 additions and 4 deletions
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13
libavcodec/bink.c
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@ -1210,6 +1210,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
*/
static av_cold void binkb_calc_quant()
{
uint8_t inv_bink_scan[64];
double s[64];
int i, j;
@ -1228,17 +1229,21 @@ static av_cold void binkb_calc_quant()
}
}
for (i = 0; i < 64; i++)
inv_bink_scan[bink_scan[i]] = i;
for (j = 0; j < 16; j++) {
for (i = 0; i < 64; i++) {
int k = inv_bink_scan[i];
if (s[i] == 1.0) {
binkb_intra_quant[j][i] = (1L << 12) * binkb_intra_seed[i] *
binkb_intra_quant[j][k] = (1L << 12) * binkb_intra_seed[i] *
binkb_num[j]/binkb_den[j];
binkb_inter_quant[j][i] = (1L << 12) * binkb_inter_seed[i] *
binkb_inter_quant[j][k] = (1L << 12) * binkb_inter_seed[i] *
binkb_num[j]/binkb_den[j];
} else {
binkb_intra_quant[j][i] = (1L << 12) * binkb_intra_seed[i] * s[i] *
binkb_intra_quant[j][k] = (1L << 12) * binkb_intra_seed[i] * s[i] *
binkb_num[j]/(double)binkb_den[j];
binkb_inter_quant[j][i] = (1L << 12) * binkb_inter_seed[i] * s[i] *
binkb_inter_quant[j][k] = (1L << 12) * binkb_inter_seed[i] * s[i] *
binkb_num[j]/(double)binkb_den[j];
}
}