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Code Issues Releases Activity

optimizations

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Originally committed as revision 1869 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-05-13 13:38:09 +00:00
parent d04fdff161
commit f7a8c179a7
2 changed files with 37 additions and 18 deletions
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4
libavcodec/h264.c
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@ -319,6 +319,8 @@ static inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t v
*(uint16_t*)(p + 1*stride)=
*(uint16_t*)(p + 2*stride)=
*(uint16_t*)(p + 3*stride)= size==4 ? val : val*0x0101;
}else if(w==4 && h==1){
*(uint32_t*)(p + 0*stride)= size==4 ? val : val*0x01010101;
}else if(w==4 && h==2){
*(uint32_t*)(p + 0*stride)=
*(uint32_t*)(p + 1*stride)= size==4 ? val : val*0x01010101;
@ -3197,7 +3199,7 @@ static int decode_mb(H264Context *h){
const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
int mb_type, partition_count, cbp;
memset(h->mb, 0, sizeof(int16_t)*24*16); //FIXME avoid if allready clear (move after skip handlong?
s->dsp.clear_blocks(h->mb); //FIXME avoid if allready clear (move after skip handlong?
tprintf("pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);

51
libavcodec/svq3.c
View File

@ -43,6 +43,15 @@
* svq3 decoder.
*/
/* dual scan (from some older h264 draft)
o-->o-->o o
| /|
o o o / o
| / | |/ |
o o o o
/
o-->o-->o-->o
*/
static const uint8_t svq3_scan[16]={
0+0*4, 1+0*4, 2+0*4, 2+1*4,
2+2*4, 3+0*4, 3+1*4, 3+2*4,
@ -446,17 +455,22 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
}
/* fill caches */
memset (h->ref_cache[0], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
/* note ref_cache[0] should contain here:
????????
???11111
N??11111
N??11111
N??11111
N
*/
if (s->mb_x > 0) {
for (i=0; i < 4; i++) {
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - 1 + i*h->b_stride];
h->ref_cache[0][scan8[0] - 1 + i*8] = 1;
}
} else {
for (i=0; i < 4; i++) {
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 + i*8] = 0;
h->ref_cache[0][scan8[0] - 1 + i*8] = 1;
}
}
if (s->mb_y > 0) {
@ -466,12 +480,15 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
if (s->mb_x < (s->mb_width - 1)) {
*(uint32_t *) h->mv_cache[0][scan8[0] + 4 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride + 4];
h->ref_cache[0][scan8[0] + 4 - 1*8] = 1;
}
}else
h->ref_cache[0][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE;
if (s->mb_x > 0) {
*(uint32_t *) h->mv_cache[0][scan8[0] - 1 - 1*8] = *(uint32_t *) s->current_picture.motion_val[0][b_xy - h->b_stride - 1];
h->ref_cache[0][scan8[0] - 1 - 1*8] = 1;
}
}
}else
h->ref_cache[0][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE;
}else
memset (&h->ref_cache[0][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8);
/* decode motion vector(s) and form prediction(s) */
part_width = ((mb_type & 5) == 5) ? 4 : 8 << (mb_type & 1);
@ -510,14 +527,7 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
}
/* update mv_cache */
for (l=0; l < part_height; l+=4) {
for (m=0; m < part_width; m+=4) {
k = scan8[0] + ((m + j) >> 2) + ((l + i) << 1);
h->mv_cache [0][k][0] = mx;
h->mv_cache [0][k][1] = my;
h->ref_cache[0][k] = 1;
}
}
fill_rectangle(h->mv_cache[0][scan8[k]], part_width>>2, part_height>>2, 8, (mx&0xFFFF)+(my<<16), 4);
svq3_mc_dir_part (s, x, y, part_width, part_height, mx, my);
}
@ -592,8 +602,8 @@ static int svq3_decode_mb (H264Context *h, unsigned int mb_type) {
memset (h->intra4x4_pred_mode[mb_xy], DC_PRED, 8);
}
if (!IS_SKIP(mb_type)) {
memset (h->mb, 0, 24*16*sizeof(DCTELEM));
memset (h->non_zero_count_cache, 0, 8*6*sizeof(uint8_t));
memset (h->non_zero_count_cache + 8, 0, 4*9*sizeof(uint8_t));
s->dsp.clear_blocks(h->mb);
}
if (IS_INTRA16x16(mb_type) || (s->pict_type != I_TYPE && s->adaptive_quant && cbp)) {
@ -743,6 +753,13 @@ static int svq3_decode_frame (AVCodecContext *avctx,
frame_start (h);
for(i=0; i<4; i++){
int j;
for(j=-1; j<4; j++)
h->ref_cache[0][scan8[0] + 8*i + j]= 1;
h->ref_cache[0][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE;
}
for (s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
for (s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
int mb_type = svq3_get_ue_golomb (&s->gb);