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reducing minimum supported picture size

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Originally committed as revision 4535 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-08-21 22:17:41 +00:00
parent 49f1a34937
commit cc884a3506
1 changed files with 24 additions and 12 deletions
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36
libavcodec/snow.c
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@ -2470,7 +2470,9 @@ static always_inline void add_yblock_buffered(SnowContext *s, slice_buffer * sb,
BlockNode *lb= lt+b_stride;
BlockNode *rb= lb+1;
uint8_t *block[4];
uint8_t tmp[src_stride*(b_h+5)]; //FIXME align
int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
uint8_t tmp[src_stride*7*MB_SIZE]; //FIXME align
uint8_t *ptmp;
int x,y;
if(b_x<0){
@ -2505,18 +2507,21 @@ static always_inline void add_yblock_buffered(SnowContext *s, slice_buffer * sb,
if(b_w<=0 || b_h<=0) return;
assert(src_stride > 7*MB_SIZE);
assert(src_stride > 2*MB_SIZE + 5);
// old_dst += src_x + src_y*dst_stride;
dst8+= src_x + src_y*src_stride;
// src += src_x + src_y*src_stride;
block[0]= tmp+3*MB_SIZE;
ptmp= tmp + 3*tmp_step;
block[0]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[0], src, tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
if(same_block(lt, rt)){
block[1]= block[0];
}else{
block[1]= tmp + 4*MB_SIZE;
block[1]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[1], src, tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
}
@ -2525,7 +2530,8 @@ assert(src_stride > 7*MB_SIZE);
}else if(same_block(rt, lb)){
block[2]= block[1];
}else{
block[2]= tmp+5*MB_SIZE;
block[2]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[2], src, tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
}
@ -2536,7 +2542,7 @@ assert(src_stride > 7*MB_SIZE);
}else if(same_block(lb, rb)){
block[3]= block[2];
}else{
block[3]= tmp+6*MB_SIZE;
block[3]= ptmp;
pred_block(s, block[3], src, tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
}
#if 0
@ -2623,7 +2629,9 @@ static always_inline void add_yblock(SnowContext *s, DWTELEM *dst, uint8_t *dst8
BlockNode *lb= lt+b_stride;
BlockNode *rb= lb+1;
uint8_t *block[4];
uint8_t tmp[src_stride*(b_h+5)]; //FIXME align
int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
uint8_t tmp[src_stride*7*MB_SIZE]; //FIXME align
uint8_t *ptmp;
int x,y;
if(b_x<0){
@ -2658,18 +2666,21 @@ static always_inline void add_yblock(SnowContext *s, DWTELEM *dst, uint8_t *dst8
if(b_w<=0 || b_h<=0) return;
assert(src_stride > 7*MB_SIZE);
assert(src_stride > 2*MB_SIZE + 5);
dst += src_x + src_y*dst_stride;
dst8+= src_x + src_y*src_stride;
// src += src_x + src_y*src_stride;
block[0]= tmp+3*MB_SIZE;
ptmp= tmp + 3*tmp_step;
block[0]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[0], src, tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
if(same_block(lt, rt)){
block[1]= block[0];
}else{
block[1]= tmp + 4*MB_SIZE;
block[1]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[1], src, tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
}
@ -2678,7 +2689,8 @@ assert(src_stride > 7*MB_SIZE);
}else if(same_block(rt, lb)){
block[2]= block[1];
}else{
block[2]= tmp+5*MB_SIZE;
block[2]= ptmp;
ptmp+=tmp_step;
pred_block(s, block[2], src, tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
}
@ -2689,7 +2701,7 @@ assert(src_stride > 7*MB_SIZE);
}else if(same_block(lb, rb)){
block[3]= block[2];
}else{
block[3]= tmp+6*MB_SIZE;
block[3]= ptmp;
pred_block(s, block[3], src, tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
}
#if 0