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cbp_table cleanup 

Originally committed as revision 3627 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-10-23 19:12:21 +00:00
parent 9af1ec8e9a
commit 3981c385cc
1 changed files with 33 additions and 110 deletions
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143
libavcodec/h264.c
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@ -307,6 +307,8 @@ typedef struct H264Context{
/* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
uint16_t *cbp_table;
int top_cbp;
int left_cbp;
/* chroma_pred_mode for i4x4 or i16x16, else 0 */
uint8_t *chroma_pred_mode_table;
int last_qscale_diff;
@ -513,6 +515,8 @@ static inline void fill_caches(H264Context *h, int mb_type){
h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][10];
h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
h->top_cbp= h->cbp_table[top_xy];
}else{
h->non_zero_count_cache[4+8*0]=
h->non_zero_count_cache[5+8*0]=
@ -523,7 +527,10 @@ static inline void fill_caches(H264Context *h, int mb_type){
h->non_zero_count_cache[2+8*0]=
h->non_zero_count_cache[1+8*3]=
h->non_zero_count_cache[2+8*3]= 64;
h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
if(IS_INTRA(mb_type)) h->top_cbp= 0x1C0;
else h->top_cbp= 0;
}
if(left_type[0]){
@ -531,11 +538,15 @@ static inline void fill_caches(H264Context *h, int mb_type){
h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][5];
h->non_zero_count_cache[0+8*1]= h->non_zero_count[left_xy[0]][9]; //FIXME left_block
h->non_zero_count_cache[0+8*4]= h->non_zero_count[left_xy[0]][12];
h->left_cbp= h->cbp_table[left_xy[0]]; //FIXME interlacing
}else{
h->non_zero_count_cache[3+8*1]=
h->non_zero_count_cache[3+8*2]=
h->non_zero_count_cache[0+8*1]=
h->non_zero_count_cache[0+8*4]= 64;
h->non_zero_count_cache[0+8*4]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
if(IS_INTRA(mb_type)) h->left_cbp= 0x1C0;//FIXME interlacing
else h->left_cbp= 0;
}
if(left_type[1]){
@ -547,7 +558,7 @@ static inline void fill_caches(H264Context *h, int mb_type){
h->non_zero_count_cache[3+8*3]=
h->non_zero_count_cache[3+8*4]=
h->non_zero_count_cache[0+8*2]=
h->non_zero_count_cache[0+8*5]= 64;
h->non_zero_count_cache[0+8*5]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
}
#if 1
@ -4012,21 +4023,11 @@ static int decode_cabac_mb_cbp_luma( H264Context *h) {
return cbp;
}
static int decode_cabac_mb_cbp_chroma( H264Context *h) {
MpegEncContext * const s = &h->s;
const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
int ctx;
int cbp_a, cbp_b;
/* No need to test for skip */
if( s->mb_x > 0 )
cbp_a = (h->cbp_table[mb_xy-1]>>4)&0x03;
else
cbp_a = -1;
if( s->mb_y > 0 )
cbp_b = (h->cbp_table[mb_xy-s->mb_stride]>>4)&0x03;
else
cbp_b = -1;
cbp_a = (h->left_cbp>>4)&0x03;
cbp_b = (h-> top_cbp>>4)&0x03;
ctx = 0;
if( cbp_a > 0 ) ctx++;
@ -4037,10 +4038,7 @@ static int decode_cabac_mb_cbp_chroma( H264Context *h) {
ctx = 4;
if( cbp_a == 2 ) ctx++;
if( cbp_b == 2 ) ctx += 2;
if( get_cabac( &h->cabac, &h->cabac_state[77 + ctx] ) )
return 2;
else
return 1;
return 1 + get_cabac( &h->cabac, &h->cabac_state[77 + ctx] );
}
static int decode_cabac_mb_dqp( H264Context *h) {
MpegEncContext * const s = &h->s;
@ -4156,105 +4154,28 @@ static int decode_cabac_mb_mvd( H264Context *h, int list, int n, int l ) {
static int get_cabac_cbf_ctx( H264Context *h, int cat, int idx ) {
MpegEncContext * const s = &h->s;
const int mb_xy = s->mb_x + s->mb_y*s->mb_stride;
int mba_xy = -1;
int mbb_xy = -1;
int nza = -1;
int nzb = -1;
int nza, nzb;
int ctx = 0;
if( cat == 0 ) {
if( s->mb_x > 0 ) {
mba_xy = mb_xy - 1;
if( IS_INTRA16x16(s->current_picture.mb_type[mba_xy] ) )
nza = h->cbp_table[mba_xy]&0x100;
}
if( s->mb_y > 0 ) {
mbb_xy = mb_xy - s->mb_stride;
if( IS_INTRA16x16(s->current_picture.mb_type[mbb_xy] ) )
nzb = h->cbp_table[mbb_xy]&0x100;
}
nza = h->left_cbp&0x100;
nzb = h-> top_cbp&0x100;
} else if( cat == 1 || cat == 2 ) {
int i8x8a, i8x8b;
int x, y;
x = block_idx_x[idx];
y = block_idx_y[idx];
if( x > 0 )
mba_xy = mb_xy;
else if( s->mb_x > 0 )
mba_xy = mb_xy - 1;
if( y > 0 )
mbb_xy = mb_xy;
else if( s->mb_y > 0 )
mbb_xy = mb_xy - s->mb_stride;
/* No need to test for skip */
if( mba_xy >= 0 ) {
i8x8a = block_idx_xy[(x-1)&0x03][y]/4;
if( !IS_INTRA_PCM(s->current_picture.mb_type[mba_xy] ) &&
((h->cbp_table[mba_xy]&0x0f)>>i8x8a))
nza = h->non_zero_count_cache[scan8[idx] - 1];
}
if( mbb_xy >= 0 ) {
i8x8b = block_idx_xy[x][(y-1)&0x03]/4;
if( !IS_INTRA_PCM(s->current_picture.mb_type[mbb_xy] ) &&
((h->cbp_table[mbb_xy]&0x0f)>>i8x8b))
nzb = h->non_zero_count_cache[scan8[idx] - 8];
}
nza = h->non_zero_count_cache[scan8[idx] - 1];
nzb = h->non_zero_count_cache[scan8[idx] - 8];
} else if( cat == 3 ) {
if( s->mb_x > 0 ) {
mba_xy = mb_xy - 1;
if( !IS_INTRA_PCM(s->current_picture.mb_type[mba_xy] ) &&
(h->cbp_table[mba_xy]&0x30) )
nza = (h->cbp_table[mba_xy]>>(6+idx))&0x01;
}
if( s->mb_y > 0 ) {
mbb_xy = mb_xy - s->mb_stride;
if( !IS_INTRA_PCM(s->current_picture.mb_type[mbb_xy] ) &&
(h->cbp_table[mbb_xy]&0x30) )
nzb = (h->cbp_table[mbb_xy]>>(6+idx))&0x01;
}
} else if( cat == 4 ) {
int idxc = idx % 4 ;
if( idxc == 1 || idxc == 3 )
mba_xy = mb_xy;
else if( s->mb_x > 0 )
mba_xy = mb_xy -1;
if( idxc == 2 || idxc == 3 )
mbb_xy = mb_xy;
else if( s->mb_y > 0 )
mbb_xy = mb_xy - s->mb_stride;
if( mba_xy >= 0 &&
!IS_INTRA_PCM(s->current_picture.mb_type[mba_xy] ) &&
(h->cbp_table[mba_xy]&0x30) == 0x20 )
nza = h->non_zero_count_cache[scan8[16+idx] - 1];
if( mbb_xy >= 0 &&
!IS_INTRA_PCM(s->current_picture.mb_type[mbb_xy] ) &&
(h->cbp_table[mbb_xy]&0x30) == 0x20 )
nzb = h->non_zero_count_cache[scan8[16+idx] - 8];
nza = (h->left_cbp>>(6+idx))&0x01;
nzb = (h-> top_cbp>>(6+idx))&0x01;
} else {
assert(cat == 4);
nza = h->non_zero_count_cache[scan8[16+idx] - 1];
nzb = h->non_zero_count_cache[scan8[16+idx] - 8];
}
if( ( mba_xy < 0 && IS_INTRA( s->current_picture.mb_type[mb_xy] ) ) ||
( mba_xy >= 0 && IS_INTRA_PCM(s->current_picture.mb_type[mba_xy] ) ) ||
nza > 0 )
if( nza > 0 )
ctx++;
if( ( mbb_xy < 0 && IS_INTRA( s->current_picture.mb_type[mb_xy] ) ) ||
( mbb_xy >= 0 && IS_INTRA_PCM(s->current_picture.mb_type[mbb_xy] ) ) ||
nzb > 0 )
if( nzb > 0 )
ctx += 2;
return ctx + 4 * cat;
@ -4463,7 +4384,9 @@ decode_intra_mb:
if(IS_INTRA_PCM(mb_type)) {
/* TODO */
h->cbp_table[mb_xy] = 0xf +4*2;
assert(0);
h->cbp_table[mb_xy] = 0xf +4*2; //FIXME ?!
h->cbp_table[mb_xy] |= 0x1C0;
h->chroma_pred_mode_table[mb_xy] = 0;
s->current_picture.qscale_table[mb_xy]= s->qscale;
return -1;