virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-21 10:55:51 +02:00
Code Issues Releases Activity

subband_coef_noise -> subband_coef_sign

Browse Source 
Cosmetics patch by Ian Braithwaite ian .. braithwaite dot dk

Originally committed as revision 8417 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ian Braithwaite 2007-03-15 21:22:10 +00:00 committed by Benjamin Larsson
parent 8b5f8e18eb
commit baab295750
1 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
libavcodec/cook.c
View File

@ -539,26 +539,26 @@ static void inline expand_category(COOKContext *q, int* category,
* @param band current subband
* @param quant_value_table pointer to the array
* @param subband_coef_index array of indexes to quant_centroid_tab
* @param subband_coef_noise use random noise instead of predetermined value
* @param subband_coef_sign signs of coefficients
* @param mlt_buffer pointer to the mlt buffer
*/
static void scalar_dequant(COOKContext *q, int index, int band,
float* quant_value_table, int* subband_coef_index,
int* subband_coef_noise, float* mlt_buffer){
int* subband_coef_sign, float* mlt_buffer){
int i;
float f1;
for(i=0 ; i<SUBBAND_SIZE ; i++) {
if (subband_coef_index[i]) {
if (subband_coef_noise[i]) {
if (subband_coef_sign[i]) {
f1 = -quant_centroid_tab[index][subband_coef_index[i]];
} else {
f1 = quant_centroid_tab[index][subband_coef_index[i]];
}
} else {
/* noise coding if subband_coef_noise[i] == 0 */
/* noise coding if subband_coef_index[i] == 0 */
q->random_state = q->random_state * 214013 + 2531011; //typical RNG numbers
f1 = randsign[(q->random_state/0x1000000)&1] * dither_tab[index]; //>>31
}
@ -566,16 +566,16 @@ static void scalar_dequant(COOKContext *q, int index, int band,
}
}
/**
* Unpack the subband_coef_index and subband_coef_noise vectors.
* Unpack the subband_coef_index and subband_coef_sign vectors.
*
* @param q pointer to the COOKContext
* @param category pointer to the category array
* @param subband_coef_index array of indexes to quant_centroid_tab
* @param subband_coef_noise use random noise instead of predetermined value
* @param subband_coef_sign signs of coefficients
*/
static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index,
int* subband_coef_noise) {
int* subband_coef_sign) {
int i,j;
int vlc, vd ,tmp, result;
int ub;
@ -599,13 +599,13 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index,
for(j=0 ; j<vd ; j++){
if (subband_coef_index[i*vd + j]) {
if(get_bits_count(&q->gb) < q->bits_per_subpacket){
subband_coef_noise[i*vd+j] = get_bits1(&q->gb);
subband_coef_sign[i*vd+j] = get_bits1(&q->gb);
} else {
result=1;
subband_coef_noise[i*vd+j]=0;
subband_coef_sign[i*vd+j]=0;
}
} else {
subband_coef_noise[i*vd+j]=0;
subband_coef_sign[i*vd+j]=0;
}
}
}
@ -627,32 +627,32 @@ static void decode_vectors(COOKContext* q, int* category,
float* quant_value_table, float* mlt_buffer){
/* A zero in this table means that the subband coefficient is
random noise coded. */
int subband_coef_noise[SUBBAND_SIZE];
int subband_coef_index[SUBBAND_SIZE];
/* A zero in this table means that the subband coefficient is a
positive multiplicator. */
int subband_coef_index[SUBBAND_SIZE];
int subband_coef_sign[SUBBAND_SIZE];
int band, j;
int index=0;
for(band=0 ; band<q->total_subbands ; band++){
index = category[band];
if(category[band] < 7){
if(unpack_SQVH(q, category[band], subband_coef_index, subband_coef_noise)){
if(unpack_SQVH(q, category[band], subband_coef_index, subband_coef_sign)){
index=7;
for(j=0 ; j<q->total_subbands ; j++) category[band+j]=7;
}
}
if(index==7) {
memset(subband_coef_index, 0, sizeof(subband_coef_index));
memset(subband_coef_noise, 0, sizeof(subband_coef_noise));
memset(subband_coef_sign, 0, sizeof(subband_coef_sign));
}
scalar_dequant(q, index, band, quant_value_table, subband_coef_index,
subband_coef_noise, mlt_buffer);
subband_coef_sign, mlt_buffer);
}
if(q->total_subbands*SUBBAND_SIZE >= q->samples_per_channel){
return;
}
} /* FIXME: should this be removed, or moved into loop above? */
}