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using pointers so the code could eventually be used for P frames

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a few const modifiers to make gcc happier

Originally committed as revision 3120 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-05-08 14:15:45 +00:00
parent bab97b2f6c
commit 0d8e09f8bf
1 changed files with 29 additions and 12 deletions
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41
libavcodec/svq1.c
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@ -67,6 +67,7 @@ typedef struct SVQ1Context {
AVCodecContext *avctx;
DSPContext dsp;
AVFrame picture;
AVFrame ref_picture[2];
PutBitContext pb;
GetBitContext gb;
@ -1318,7 +1319,23 @@ static int encode_block(SVQ1Context *s, uint8_t *src, int stride, int level, int
int h= 2<<((level+1)>>1);
int size=w*h;
int16_t block[7][256];
const int intra= 1;
const int8_t *codebook_sum, *codebook;
const uint16_t (*mean_vlc)[2];
const uint8_t (*multistage_vlc)[2];
if(intra){
codebook_sum= svq1_intra_codebook_sum[level];
codebook= svq1_intra_codebooks[level];
mean_vlc= svq1_intra_mean_vlc;
multistage_vlc= svq1_intra_multistage_vlc[level];
}else{
codebook_sum= svq1_inter_codebook_sum[level];
codebook= svq1_inter_codebooks[level];
mean_vlc= svq1_inter_mean_vlc;
multistage_vlc= svq1_inter_multistage_vlc[level];
}
best_score=0;
for(y=0; y<h; y++){
for(x=0; x<w; x++){
@ -1338,14 +1355,14 @@ static int encode_block(SVQ1Context *s, uint8_t *src, int stride, int level, int
int best_vector_score= INT_MAX;
int best_vector_sum=-99, best_vector_mean=-99;
const int stage= count-1;
int8_t *vector;
const int8_t *vector;
for(i=0; i<16; i++){
int sum= svq1_intra_codebook_sum[level][stage*16 + i];
int sum= codebook_sum[stage*16 + i];
int sqr=0;
int diff, mean, score;
vector = svq1_intra_codebooks[level] + stage*size*16 + i*size;
vector = codebook + stage*size*16 + i*size;
for(j=0; j<size; j++){
int v= vector[j];
@ -1364,15 +1381,15 @@ static int encode_block(SVQ1Context *s, uint8_t *src, int stride, int level, int
}
}
assert(best_vector_mean != -99);
vector= svq1_intra_codebooks[level] + stage*size*16 + best_vector[stage]*size;
vector= codebook + stage*size*16 + best_vector[stage]*size;
for(j=0; j<size; j++){
block[stage+1][j] = block[stage][j] - vector[j];
}
block_sum[stage+1]= block_sum[stage] - best_vector_sum;
best_vector_score +=
lambda*(+ 1 + 4*count
+ svq1_intra_multistage_vlc[level][1+count][1]
+ svq1_intra_mean_vlc[best_vector_mean][1]);
+ multistage_vlc[1+count][1]
+ mean_vlc[best_vector_mean][1]);
if(best_vector_score < best_score){
best_score= best_vector_score;
@ -1414,10 +1431,10 @@ static int encode_block(SVQ1Context *s, uint8_t *src, int stride, int level, int
/* output the encoding */
put_bits(&s->reorder_pb[level],
svq1_intra_multistage_vlc[level][1 + best_count][1],
svq1_intra_multistage_vlc[level][1 + best_count][0]);
put_bits(&s->reorder_pb[level], svq1_intra_mean_vlc[best_mean][1],
svq1_intra_mean_vlc[best_mean][0]);
multistage_vlc[1 + best_count][1],
multistage_vlc[1 + best_count][0]);
put_bits(&s->reorder_pb[level], mean_vlc[best_mean][1],
mean_vlc[best_mean][0]);
for (i = 0; i < best_count; i++){
assert(best_vector[i]>=0 && best_vector[i]<16);
@ -1653,7 +1670,7 @@ static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
*p = *pict;
p->pict_type = I_TYPE;
p->key_frame = 1;
p->key_frame = p->pict_type == I_TYPE;
svq1_write_header(s, p->pict_type);
svq1_encode_plane(s, s->picture.data[0], s->frame_width, s->frame_height,