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Multiply table by -1. This avoid doing this calculation (that was introduced 

in my last commit) in real time.

Originally committed as revision 15195 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-09-04 15:04:08 +00:00
parent e4b8f1fa77
commit 1775c7fac6
2 changed files with 10 additions and 10 deletions
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2
libavcodec/aac.c
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@ -635,7 +635,7 @@ static int decode_tns(AACContext * ac, TemporalNoiseShaping * tns,
tmp2_idx = 2*coef_compress + coef_res; tmp2_idx = 2*coef_compress + coef_res;
for (i = 0; i < tns->order[w][filt]; i++) for (i = 0; i < tns->order[w][filt]; i++)
tns->coef[w][filt][i] = -tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)]; tns->coef[w][filt][i] = tns_tmp2_map[tmp2_idx][get_bits(gb, coef_len)];
} }
} }
} }

18
libavcodec/aacdectab.h
View File

@ -178,24 +178,24 @@ static const uint8_t tns_max_bands_128[] = {
* @{ * @{
*/ */
static const float tns_tmp2_map_1_3[4] = { static const float tns_tmp2_map_1_3[4] = {
0.00000000, 0.43388373, -0.64278758, -0.34202015, 0.00000000, -0.43388373, 0.64278758, 0.34202015,
}; };
static const float tns_tmp2_map_0_3[8] = { static const float tns_tmp2_map_0_3[8] = {
0.00000000, 0.43388373, 0.78183150, 0.97492790, 0.00000000, -0.43388373, -0.78183150, -0.97492790,
-0.98480773, -0.86602539, -0.64278758, -0.34202015, 0.98480773, 0.86602539, 0.64278758, 0.34202015,
}; };
static const float tns_tmp2_map_1_4[8] = { static const float tns_tmp2_map_1_4[8] = {
0.00000000, 0.20791170, 0.40673664, 0.58778524, 0.00000000, -0.20791170, -0.40673664, -0.58778524,
-0.67369562, -0.52643216, -0.36124167, -0.18374951, 0.67369562, 0.52643216, 0.36124167, 0.18374951,
}; };
static const float tns_tmp2_map_0_4[16] = { static const float tns_tmp2_map_0_4[16] = {
0.00000000, 0.20791170, 0.40673664, 0.58778524, 0.00000000, -0.20791170, -0.40673664, -0.58778524,
0.74314481, 0.86602539, 0.95105654, 0.99452192, -0.74314481, -0.86602539, -0.95105654, -0.99452192,
-0.99573416, -0.96182561, -0.89516330, -0.79801720, 0.99573416, 0.96182561, 0.89516330, 0.79801720,
-0.67369562, -0.52643216, -0.36124167, -0.18374951, 0.67369562, 0.52643216, 0.36124167, 0.18374951,
}; };
static const float *tns_tmp2_map[4] = { static const float *tns_tmp2_map[4] = {