RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

cleanup 

Originally committed as revision 2651 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-01-02 03:02:34 +00:00
parent 7485d118f2
commit 34e0a29d36
1 changed files with 14 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
libavcodec/mpegvideo.c
View File

@ -4758,41 +4758,28 @@ static int dct_quantize_trellis_c(MpegEncContext *s,
for(i=0; i<=last_non_zero - start_i; i++){
int level_index, run, j;
const int dct_coeff= block[ scantable[i + start_i] ];
const int dct_coeff= ABS(block[ scantable[i + start_i] ]);
const int zero_distoration= dct_coeff*dct_coeff;
int best_score=256*256*256*120;
for(level_index=0; level_index < coeff_count[i]; level_index++){
int distoration;
int level= coeff[level_index][i];
const int alevel= ABS(level);
int unquant_coeff;
assert(level);
if(s->out_format == FMT_H263){
if(level>0){
unquant_coeff= level*qmul + qadd;
}else{
unquant_coeff= level*qmul - qadd;
}
unquant_coeff= alevel*qmul + qadd;
}else{ //MPEG1
j= s->dsp.idct_permutation[ scantable[i + start_i] ]; //FIXME optimize
if(s->mb_intra){
if (level < 0) {
unquant_coeff = (int)((-level) * qscale * s->intra_matrix[j]) >> 3;
unquant_coeff = -((unquant_coeff - 1) | 1);
} else {
unquant_coeff = (int)( level * qscale * s->intra_matrix[j]) >> 3;
unquant_coeff = (int)( alevel * qscale * s->intra_matrix[j]) >> 3;
unquant_coeff = (unquant_coeff - 1) | 1;
}
}else{
if (level < 0) {
unquant_coeff = ((((-level) << 1) + 1) * qscale * ((int) s->inter_matrix[j])) >> 4;
unquant_coeff = -((unquant_coeff - 1) | 1);
} else {
unquant_coeff = ((( level << 1) + 1) * qscale * ((int) s->inter_matrix[j])) >> 4;
unquant_coeff = ((( alevel << 1) + 1) * qscale * ((int) s->inter_matrix[j])) >> 4;
unquant_coeff = (unquant_coeff - 1) | 1;
}
}
unquant_coeff<<= 3;
}
@ -4880,7 +4867,7 @@ static int dct_quantize_trellis_c(MpegEncContext *s,
s->coded_score[n] = last_score;
dc= block[0];
dc= ABS(block[0]);
last_non_zero= last_i - 1 + start_i;
memset(block + start_i, 0, (64-start_i)*sizeof(DCTELEM));
@ -4893,32 +4880,22 @@ static int dct_quantize_trellis_c(MpegEncContext *s,
for(i=0; i<coeff_count[0]; i++){
int level= coeff[i][0];
int unquant_coeff, score, distoration;
int alevel= ABS(level);
int unquant_coeff, score, distortion;
if(s->out_format == FMT_H263){
if(level>0){
unquant_coeff= (level*qmul + qadd)>>3;
}else{
unquant_coeff= (level*qmul - qadd)>>3;
}
unquant_coeff= (alevel*qmul + qadd)>>3;
}else{ //MPEG1
if (level < 0) {
unquant_coeff = ((((-level) << 1) + 1) * qscale * ((int) s->inter_matrix[0])) >> 4;
unquant_coeff = -((unquant_coeff - 1) | 1);
} else {
unquant_coeff = ((( level << 1) + 1) * qscale * ((int) s->inter_matrix[0])) >> 4;
unquant_coeff = (unquant_coeff - 1) | 1;
}
unquant_coeff = ((( alevel << 1) + 1) * qscale * ((int) s->inter_matrix[0])) >> 4;
unquant_coeff = (unquant_coeff - 1) | 1;
}
unquant_coeff = (unquant_coeff + 4) >> 3;
unquant_coeff<<= 3 + 3;
distoration= (unquant_coeff - dc) * (unquant_coeff - dc);
distortion= (unquant_coeff - dc) * (unquant_coeff - dc);
level+=64;
if((level&(~127)) == 0)
score= distoration + last_length[UNI_AC_ENC_INDEX(0, level)]*lambda;
else
score= distoration + esc_length*lambda;
if((level&(~127)) == 0) score= distortion + last_length[UNI_AC_ENC_INDEX(0, level)]*lambda;
else score= distortion + esc_length*lambda;
if(score < best_score){
best_score= score;