216
int ff_snow_common_init(AVCodecContext *avctx);
217
int ff_snow_common_init_after_header(AVCodecContext *avctx);
218
void ff_snow_common_end(SnowContext *s);
219
void ff_snow_release_buffer(AVCodecContext *avctx);
220
void ff_snow_reset_contexts(SnowContext *s);
221
int ff_snow_alloc_blocks(SnowContext *s);
222
int ff_snow_frame_start(SnowContext *s);
223
void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, int stride,
224
int sx, int sy, int b_w, int b_h, BlockNode *block,
225
int plane_index, int w, int h);
226
/* common inline functions */
227
//XXX doublecheck all of them should stay inlined
229
static inline void snow_set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){
230
const int w= s->b_width << s->block_max_depth;
231
const int rem_depth= s->block_max_depth - level;
232
const int index= (x + y*w) << rem_depth;
233
const int block_w= 1<<rem_depth;
246
for(j=0; j<block_w; j++){
247
for(i=0; i<block_w; i++){
248
s->block[index + i + j*w]= block;
253
static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
254
const BlockNode *left, const BlockNode *top, const BlockNode *tr){
255
if(s->ref_frames == 1){
256
*mx = mid_pred(left->mx, top->mx, tr->mx);
257
*my = mid_pred(left->my, top->my, tr->my);
259
const int *scale = scale_mv_ref[ref];
260
*mx = mid_pred((left->mx * scale[left->ref] + 128) >>8,
261
(top ->mx * scale[top ->ref] + 128) >>8,
262
(tr ->mx * scale[tr ->ref] + 128) >>8);
263
*my = mid_pred((left->my * scale[left->ref] + 128) >>8,
264
(top ->my * scale[top ->ref] + 128) >>8,
265
(tr ->my * scale[tr ->ref] + 128) >>8);
269
static av_always_inline int same_block(BlockNode *a, BlockNode *b){
270
if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
271
return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
273
return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA));
277
//FIXME name cleanup (b_w, block_w, b_width stuff)
278
//XXX should we really inline it?
279
static av_always_inline void add_yblock(SnowContext *s, int sliced, slice_buffer *sb, IDWTELEM *dst, uint8_t *dst8, const uint8_t *obmc, int src_x, int src_y, int b_w, int b_h, int w, int h, int dst_stride, int src_stride, int obmc_stride, int b_x, int b_y, int add, int offset_dst, int plane_index){
280
const int b_width = s->b_width << s->block_max_depth;
281
const int b_height= s->b_height << s->block_max_depth;
282
const int b_stride= b_width;
283
BlockNode *lt= &s->block[b_x + b_y*b_stride];
285
BlockNode *lb= lt+b_stride;
288
int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
289
uint8_t *tmp = s->scratchbuf;
296
}else if(b_x + 1 >= b_width){
303
}else if(b_y + 1 >= b_height){
308
if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
311
if(!sliced && !offset_dst)
314
}else if(src_x + b_w > w){
318
obmc -= src_y*obmc_stride;
320
if(!sliced && !offset_dst)
321
dst -= src_y*dst_stride;
323
}else if(src_y + b_h> h){
327
if(b_w<=0 || b_h<=0) return;
329
assert(src_stride > 2*MB_SIZE + 5);
331
if(!sliced && offset_dst)
332
dst += src_x + src_y*dst_stride;
333
dst8+= src_x + src_y*src_stride;
334
// src += src_x + src_y*src_stride;
336
ptmp= tmp + 3*tmp_step;
339
ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
341
if(same_block(lt, rt)){
346
ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
349
if(same_block(lt, lb)){
351
}else if(same_block(rt, lb)){
356
ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
359
if(same_block(lt, rb) ){
361
}else if(same_block(rt, rb)){
363
}else if(same_block(lb, rb)){
367
ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
370
s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
372
for(y=0; y<b_h; y++){
373
//FIXME ugly misuse of obmc_stride
374
const uint8_t *obmc1= obmc + y*obmc_stride;
375
const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
376
const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
377
const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
378
for(x=0; x<b_w; x++){
379
int v= obmc1[x] * block[3][x + y*src_stride]
380
+obmc2[x] * block[2][x + y*src_stride]
381
+obmc3[x] * block[1][x + y*src_stride]
382
+obmc4[x] * block[0][x + y*src_stride];
384
v <<= 8 - LOG2_OBMC_MAX;
389
v += dst[x + y*dst_stride];
390
v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
391
if(v&(~255)) v= ~(v>>31);
392
dst8[x + y*src_stride] = v;
394
dst[x + y*dst_stride] -= v;
401
static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
402
Plane *p= &s->plane[plane_index];
403
const int mb_w= s->b_width << s->block_max_depth;
404
const int mb_h= s->b_height << s->block_max_depth;
406
int block_size = MB_SIZE >> s->block_max_depth;
407
int block_w = plane_index ? block_size/2 : block_size;
408
const uint8_t *obmc = plane_index ? obmc_tab[s->block_max_depth+1] : obmc_tab[s->block_max_depth];
409
const int obmc_stride= plane_index ? block_size : 2*block_size;
410
int ref_stride= s->current_picture.linesize[plane_index];
411
uint8_t *dst8= s->current_picture.data[plane_index];
415
if(s->keyframe || (s->avctx->debug&512)){
420
for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
422
int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
424
if(v&(~255)) v= ~(v>>31);
425
dst8[x + y*ref_stride]= v;
429
for(y=block_w*mb_y; y<FFMIN(h,block_w*(mb_y+1)); y++){
431
buf[x + y*w]-= 128<<FRAC_BITS;
439
for(mb_x=0; mb_x<=mb_w; mb_x++){
440
add_yblock(s, 0, NULL, buf, dst8, obmc,
441
block_w*mb_x - block_w/2,
442
block_w*mb_y - block_w/2,
445
w, ref_stride, obmc_stride,
447
add, 1, plane_index);
451
static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
452
const int mb_h= s->b_height << s->block_max_depth;
454
for(mb_y=0; mb_y<=mb_h; mb_y++)
455
predict_slice(s, buf, plane_index, add, mb_y);
458
static inline void set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type){
459
const int w= s->b_width << s->block_max_depth;
460
const int rem_depth= s->block_max_depth - level;
461
const int index= (x + y*w) << rem_depth;
462
const int block_w= 1<<rem_depth;
475
for(j=0; j<block_w; j++){
476
for(i=0; i<block_w; i++){
477
s->block[index + i + j*w]= block;
482
static inline void init_ref(MotionEstContext *c, uint8_t *src[3], uint8_t *ref[3], uint8_t *ref2[3], int x, int y, int ref_index){
483
const int offset[3]= {
485
((y*c->uvstride + x)>>1),
486
((y*c->uvstride + x)>>1),
490
c->src[0][i]= src [i];
491
c->ref[0][i]= ref [i] + offset[i];
497
/* bitstream functions */
499
extern const int8_t quant3bA[256];
501
#define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0
503
static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
507
const int a= FFABS(v);
508
const int e= av_log2(a);
509
const int el= FFMIN(e, 10);
510
put_rac(c, state+0, 0);
513
put_rac(c, state+1+i, 1); //1..10
516
put_rac(c, state+1+9, 1); //1..10
518
put_rac(c, state+1+FFMIN(i,9), 0);
520
for(i=e-1; i>=el; i--){
521
put_rac(c, state+22+9, (a>>i)&1); //22..31
524
put_rac(c, state+22+i, (a>>i)&1); //22..31
528
put_rac(c, state+11 + el, v < 0); //11..21
530
put_rac(c, state+0, 1);
534
static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
535
if(get_rac(c, state+0))
540
while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
545
for(i=e-1; i>=0; i--){
546
a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
549
e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21
554
static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){
556
int r= log2>=0 ? 1<<log2 : 1;
562
put_rac(c, state+4+log2, 1);
567
put_rac(c, state+4+log2, 0);
569
for(i=log2-1; i>=0; i--){
570
put_rac(c, state+31-i, (v>>i)&1);
574
static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){
576
int r= log2>=0 ? 1<<log2 : 1;
581
while(get_rac(c, state+4+log2)){
587
for(i=log2-1; i>=0; i--){
588
v+= get_rac(c, state+31-i)<<i;
594
static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){
595
const int w= b->width;
596
const int h= b->height;
600
x_and_coeff *xc= b->x_coeff;
601
x_and_coeff *prev_xc= NULL;
602
x_and_coeff *prev2_xc= xc;
603
x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL;
604
x_and_coeff *prev_parent_xc= parent_xc;
606
runs= get_symbol2(&s->c, b->state[30], 0);
607
if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
614
if(y && prev_xc->x == 0){
626
if(prev_xc->x == x + 1)
632
if(x>>1 > parent_xc->x){
635
if(x>>1 == parent_xc->x){
639
if(/*ll|*/l|lt|t|rt|p){
640
int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
642
v=get_rac(&s->c, &b->state[0][context]);
644
v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
645
v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + quant3bA[l&0xFF] + 3*quant3bA[t&0xFF]]);
652
if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
654
v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
655
v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
664
if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
665
else max_run= FFMIN(run, w-x-1);
667
max_run= FFMIN(max_run, 2*parent_xc->x - x - 1);
673
(xc++)->x= w+1; //end marker
679
while(parent_xc->x != parent->width+1)
682
prev_parent_xc= parent_xc;
684
parent_xc= prev_parent_xc;
689
(xc++)->x= w+1; //end marker
78
692
#endif /* AVCODEC_SNOW_H */