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snow.c
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1 /*
2  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/intmath.h"
22 #include "libavutil/log.h"
23 #include "libavutil/opt.h"
24 #include "avcodec.h"
25 #include "me_cmp.h"
26 #include "snow_dwt.h"
27 #include "internal.h"
28 #include "snow.h"
29 #include "snowdata.h"
30 
31 #include "rangecoder.h"
32 #include "mathops.h"
33 #include "h263.h"
34 
35 
36 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
37  int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
38  int y, x;
39  IDWTELEM * dst;
40  for(y=0; y<b_h; y++){
41  //FIXME ugly misuse of obmc_stride
42  const uint8_t *obmc1= obmc + y*obmc_stride;
43  const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
44  const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
45  const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
46  dst = slice_buffer_get_line(sb, src_y + y);
47  for(x=0; x<b_w; x++){
48  int v= obmc1[x] * block[3][x + y*src_stride]
49  +obmc2[x] * block[2][x + y*src_stride]
50  +obmc3[x] * block[1][x + y*src_stride]
51  +obmc4[x] * block[0][x + y*src_stride];
52 
53  v <<= 8 - LOG2_OBMC_MAX;
54  if(FRAC_BITS != 8){
55  v >>= 8 - FRAC_BITS;
56  }
57  if(add){
58  v += dst[x + src_x];
59  v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
60  if(v&(~255)) v= ~(v>>31);
61  dst8[x + y*src_stride] = v;
62  }else{
63  dst[x + src_x] -= v;
64  }
65  }
66  }
67 }
68 
69 int ff_snow_get_buffer(SnowContext *s, AVFrame *frame)
70 {
71  int ret, i;
72  int edges_needed = av_codec_is_encoder(s->avctx->codec);
73 
74  frame->width = s->avctx->width ;
75  frame->height = s->avctx->height;
76  if (edges_needed) {
77  frame->width += 2 * EDGE_WIDTH;
78  frame->height += 2 * EDGE_WIDTH;
79  }
80  if ((ret = ff_get_buffer(s->avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
81  return ret;
82  if (edges_needed) {
83  for (i = 0; frame->data[i]; i++) {
84  int offset = (EDGE_WIDTH >> (i ? s->chroma_v_shift : 0)) *
85  frame->linesize[i] +
86  (EDGE_WIDTH >> (i ? s->chroma_h_shift : 0));
87  frame->data[i] += offset;
88  }
89  frame->width = s->avctx->width;
90  frame->height = s->avctx->height;
91  }
92 
93  return 0;
94 }
95 
96 void ff_snow_reset_contexts(SnowContext *s){ //FIXME better initial contexts
97  int plane_index, level, orientation;
98 
99  for(plane_index=0; plane_index<3; plane_index++){
100  for(level=0; level<MAX_DECOMPOSITIONS; level++){
101  for(orientation=level ? 1:0; orientation<4; orientation++){
102  memset(s->plane[plane_index].band[level][orientation].state, MID_STATE, sizeof(s->plane[plane_index].band[level][orientation].state));
103  }
104  }
105  }
106  memset(s->header_state, MID_STATE, sizeof(s->header_state));
107  memset(s->block_state, MID_STATE, sizeof(s->block_state));
108 }
109 
110 int ff_snow_alloc_blocks(SnowContext *s){
111  int w= FF_CEIL_RSHIFT(s->avctx->width, LOG2_MB_SIZE);
112  int h= FF_CEIL_RSHIFT(s->avctx->height, LOG2_MB_SIZE);
113 
114  s->b_width = w;
115  s->b_height= h;
116 
117  av_free(s->block);
118  s->block= av_mallocz_array(w * h, sizeof(BlockNode) << (s->block_max_depth*2));
119  if (!s->block)
120  return AVERROR(ENOMEM);
121 
122  return 0;
123 }
124 
125 static av_cold void init_qexp(void){
126  int i;
127  double v=128;
128 
129  for(i=0; i<QROOT; i++){
130  ff_qexp[i]= lrintf(v);
131  v *= pow(2, 1.0 / QROOT);
132  }
133 }
134 static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy){
135  static const uint8_t weight[64]={
136  8,7,6,5,4,3,2,1,
137  7,7,0,0,0,0,0,1,
138  6,0,6,0,0,0,2,0,
139  5,0,0,5,0,3,0,0,
140  4,0,0,0,4,0,0,0,
141  3,0,0,5,0,3,0,0,
142  2,0,6,0,0,0,2,0,
143  1,7,0,0,0,0,0,1,
144  };
145 
146  static const uint8_t brane[256]={
147  0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x11,0x12,0x12,0x12,0x12,0x12,0x12,0x12,
148  0x04,0x05,0xcc,0xcc,0xcc,0xcc,0xcc,0x41,0x15,0x16,0xcc,0xcc,0xcc,0xcc,0xcc,0x52,
149  0x04,0xcc,0x05,0xcc,0xcc,0xcc,0x41,0xcc,0x15,0xcc,0x16,0xcc,0xcc,0xcc,0x52,0xcc,
150  0x04,0xcc,0xcc,0x05,0xcc,0x41,0xcc,0xcc,0x15,0xcc,0xcc,0x16,0xcc,0x52,0xcc,0xcc,
151  0x04,0xcc,0xcc,0xcc,0x41,0xcc,0xcc,0xcc,0x15,0xcc,0xcc,0xcc,0x16,0xcc,0xcc,0xcc,
152  0x04,0xcc,0xcc,0x41,0xcc,0x05,0xcc,0xcc,0x15,0xcc,0xcc,0x52,0xcc,0x16,0xcc,0xcc,
153  0x04,0xcc,0x41,0xcc,0xcc,0xcc,0x05,0xcc,0x15,0xcc,0x52,0xcc,0xcc,0xcc,0x16,0xcc,
154  0x04,0x41,0xcc,0xcc,0xcc,0xcc,0xcc,0x05,0x15,0x52,0xcc,0xcc,0xcc,0xcc,0xcc,0x16,
155  0x44,0x45,0x45,0x45,0x45,0x45,0x45,0x45,0x55,0x56,0x56,0x56,0x56,0x56,0x56,0x56,
156  0x48,0x49,0xcc,0xcc,0xcc,0xcc,0xcc,0x85,0x59,0x5A,0xcc,0xcc,0xcc,0xcc,0xcc,0x96,
157  0x48,0xcc,0x49,0xcc,0xcc,0xcc,0x85,0xcc,0x59,0xcc,0x5A,0xcc,0xcc,0xcc,0x96,0xcc,
158  0x48,0xcc,0xcc,0x49,0xcc,0x85,0xcc,0xcc,0x59,0xcc,0xcc,0x5A,0xcc,0x96,0xcc,0xcc,
159  0x48,0xcc,0xcc,0xcc,0x49,0xcc,0xcc,0xcc,0x59,0xcc,0xcc,0xcc,0x96,0xcc,0xcc,0xcc,
160  0x48,0xcc,0xcc,0x85,0xcc,0x49,0xcc,0xcc,0x59,0xcc,0xcc,0x96,0xcc,0x5A,0xcc,0xcc,
161  0x48,0xcc,0x85,0xcc,0xcc,0xcc,0x49,0xcc,0x59,0xcc,0x96,0xcc,0xcc,0xcc,0x5A,0xcc,
162  0x48,0x85,0xcc,0xcc,0xcc,0xcc,0xcc,0x49,0x59,0x96,0xcc,0xcc,0xcc,0xcc,0xcc,0x5A,
163  };
164 
165  static const uint8_t needs[16]={
166  0,1,0,0,
167  2,4,2,0,
168  0,1,0,0,
169  15
170  };
171 
172  int x, y, b, r, l;
173  int16_t tmpIt [64*(32+HTAPS_MAX)];
174  uint8_t tmp2t[3][64*(32+HTAPS_MAX)];
175  int16_t *tmpI= tmpIt;
176  uint8_t *tmp2= tmp2t[0];
177  const uint8_t *hpel[11];
178  av_assert2(dx<16 && dy<16);
179  r= brane[dx + 16*dy]&15;
180  l= brane[dx + 16*dy]>>4;
181 
182  b= needs[l] | needs[r];
183  if(p && !p->diag_mc)
184  b= 15;
185 
186  if(b&5){
187  for(y=0; y < b_h+HTAPS_MAX-1; y++){
188  for(x=0; x < b_w; x++){
189  int a_1=src[x + HTAPS_MAX/2-4];
190  int a0= src[x + HTAPS_MAX/2-3];
191  int a1= src[x + HTAPS_MAX/2-2];
192  int a2= src[x + HTAPS_MAX/2-1];
193  int a3= src[x + HTAPS_MAX/2+0];
194  int a4= src[x + HTAPS_MAX/2+1];
195  int a5= src[x + HTAPS_MAX/2+2];
196  int a6= src[x + HTAPS_MAX/2+3];
197  int am=0;
198  if(!p || p->fast_mc){
199  am= 20*(a2+a3) - 5*(a1+a4) + (a0+a5);
200  tmpI[x]= am;
201  am= (am+16)>>5;
202  }else{
203  am= p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6);
204  tmpI[x]= am;
205  am= (am+32)>>6;
206  }
207 
208  if(am&(~255)) am= ~(am>>31);
209  tmp2[x]= am;
210  }
211  tmpI+= 64;
212  tmp2+= 64;
213  src += stride;
214  }
215  src -= stride*y;
216  }
217  src += HTAPS_MAX/2 - 1;
218  tmp2= tmp2t[1];
219 
220  if(b&2){
221  for(y=0; y < b_h; y++){
222  for(x=0; x < b_w+1; x++){
223  int a_1=src[x + (HTAPS_MAX/2-4)*stride];
224  int a0= src[x + (HTAPS_MAX/2-3)*stride];
225  int a1= src[x + (HTAPS_MAX/2-2)*stride];
226  int a2= src[x + (HTAPS_MAX/2-1)*stride];
227  int a3= src[x + (HTAPS_MAX/2+0)*stride];
228  int a4= src[x + (HTAPS_MAX/2+1)*stride];
229  int a5= src[x + (HTAPS_MAX/2+2)*stride];
230  int a6= src[x + (HTAPS_MAX/2+3)*stride];
231  int am=0;
232  if(!p || p->fast_mc)
233  am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 16)>>5;
234  else
235  am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 32)>>6;
236 
237  if(am&(~255)) am= ~(am>>31);
238  tmp2[x]= am;
239  }
240  src += stride;
241  tmp2+= 64;
242  }
243  src -= stride*y;
244  }
245  src += stride*(HTAPS_MAX/2 - 1);
246  tmp2= tmp2t[2];
247  tmpI= tmpIt;
248  if(b&4){
249  for(y=0; y < b_h; y++){
250  for(x=0; x < b_w; x++){
251  int a_1=tmpI[x + (HTAPS_MAX/2-4)*64];
252  int a0= tmpI[x + (HTAPS_MAX/2-3)*64];
253  int a1= tmpI[x + (HTAPS_MAX/2-2)*64];
254  int a2= tmpI[x + (HTAPS_MAX/2-1)*64];
255  int a3= tmpI[x + (HTAPS_MAX/2+0)*64];
256  int a4= tmpI[x + (HTAPS_MAX/2+1)*64];
257  int a5= tmpI[x + (HTAPS_MAX/2+2)*64];
258  int a6= tmpI[x + (HTAPS_MAX/2+3)*64];
259  int am=0;
260  if(!p || p->fast_mc)
261  am= (20*(a2+a3) - 5*(a1+a4) + (a0+a5) + 512)>>10;
262  else
263  am= (p->hcoeff[0]*(a2+a3) + p->hcoeff[1]*(a1+a4) + p->hcoeff[2]*(a0+a5) + p->hcoeff[3]*(a_1+a6) + 2048)>>12;
264  if(am&(~255)) am= ~(am>>31);
265  tmp2[x]= am;
266  }
267  tmpI+= 64;
268  tmp2+= 64;
269  }
270  }
271 
272  hpel[ 0]= src;
273  hpel[ 1]= tmp2t[0] + 64*(HTAPS_MAX/2-1);
274  hpel[ 2]= src + 1;
275 
276  hpel[ 4]= tmp2t[1];
277  hpel[ 5]= tmp2t[2];
278  hpel[ 6]= tmp2t[1] + 1;
279 
280  hpel[ 8]= src + stride;
281  hpel[ 9]= hpel[1] + 64;
282  hpel[10]= hpel[8] + 1;
283 
284 #define MC_STRIDE(x) (needs[x] ? 64 : stride)
285 
286  if(b==15){
287  int dxy = dx / 8 + dy / 8 * 4;
288  const uint8_t *src1 = hpel[dxy ];
289  const uint8_t *src2 = hpel[dxy + 1];
290  const uint8_t *src3 = hpel[dxy + 4];
291  const uint8_t *src4 = hpel[dxy + 5];
292  int stride1 = MC_STRIDE(dxy);
293  int stride2 = MC_STRIDE(dxy + 1);
294  int stride3 = MC_STRIDE(dxy + 4);
295  int stride4 = MC_STRIDE(dxy + 5);
296  dx&=7;
297  dy&=7;
298  for(y=0; y < b_h; y++){
299  for(x=0; x < b_w; x++){
300  dst[x]= ((8-dx)*(8-dy)*src1[x] + dx*(8-dy)*src2[x]+
301  (8-dx)* dy *src3[x] + dx* dy *src4[x]+32)>>6;
302  }
303  src1+=stride1;
304  src2+=stride2;
305  src3+=stride3;
306  src4+=stride4;
307  dst +=stride;
308  }
309  }else{
310  const uint8_t *src1= hpel[l];
311  const uint8_t *src2= hpel[r];
312  int stride1 = MC_STRIDE(l);
313  int stride2 = MC_STRIDE(r);
314  int a= weight[((dx&7) + (8*(dy&7)))];
315  int b= 8-a;
316  for(y=0; y < b_h; y++){
317  for(x=0; x < b_w; x++){
318  dst[x]= (a*src1[x] + b*src2[x] + 4)>>3;
319  }
320  src1+=stride1;
321  src2+=stride2;
322  dst +=stride;
323  }
324  }
325 }
326 
327 void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride, int sx, int sy, int b_w, int b_h, const BlockNode *block, int plane_index, int w, int h){
328  if(block->type & BLOCK_INTRA){
329  int x, y;
330  const unsigned color = block->color[plane_index];
331  const unsigned color4 = color*0x01010101;
332  if(b_w==32){
333  for(y=0; y < b_h; y++){
334  *(uint32_t*)&dst[0 + y*stride]= color4;
335  *(uint32_t*)&dst[4 + y*stride]= color4;
336  *(uint32_t*)&dst[8 + y*stride]= color4;
337  *(uint32_t*)&dst[12+ y*stride]= color4;
338  *(uint32_t*)&dst[16+ y*stride]= color4;
339  *(uint32_t*)&dst[20+ y*stride]= color4;
340  *(uint32_t*)&dst[24+ y*stride]= color4;
341  *(uint32_t*)&dst[28+ y*stride]= color4;
342  }
343  }else if(b_w==16){
344  for(y=0; y < b_h; y++){
345  *(uint32_t*)&dst[0 + y*stride]= color4;
346  *(uint32_t*)&dst[4 + y*stride]= color4;
347  *(uint32_t*)&dst[8 + y*stride]= color4;
348  *(uint32_t*)&dst[12+ y*stride]= color4;
349  }
350  }else if(b_w==8){
351  for(y=0; y < b_h; y++){
352  *(uint32_t*)&dst[0 + y*stride]= color4;
353  *(uint32_t*)&dst[4 + y*stride]= color4;
354  }
355  }else if(b_w==4){
356  for(y=0; y < b_h; y++){
357  *(uint32_t*)&dst[0 + y*stride]= color4;
358  }
359  }else{
360  for(y=0; y < b_h; y++){
361  for(x=0; x < b_w; x++){
362  dst[x + y*stride]= color;
363  }
364  }
365  }
366  }else{
367  uint8_t *src= s->last_picture[block->ref]->data[plane_index];
368  const int scale= plane_index ? (2*s->mv_scale)>>s->chroma_h_shift : 2*s->mv_scale;
369  int mx= block->mx*scale;
370  int my= block->my*scale;
371  const int dx= mx&15;
372  const int dy= my&15;
373  const int tab_index= 3 - (b_w>>2) + (b_w>>4);
374  sx += (mx>>4) - (HTAPS_MAX/2-1);
375  sy += (my>>4) - (HTAPS_MAX/2-1);
376  src += sx + sy*stride;
377  if( (unsigned)sx >= FFMAX(w - b_w - (HTAPS_MAX-2), 0)
378  || (unsigned)sy >= FFMAX(h - b_h - (HTAPS_MAX-2), 0)){
379  s->vdsp.emulated_edge_mc(tmp + MB_SIZE, src,
380  stride, stride,
381  b_w+HTAPS_MAX-1, b_h+HTAPS_MAX-1,
382  sx, sy, w, h);
383  src= tmp + MB_SIZE;
384  }
385 
386  av_assert2(s->chroma_h_shift == s->chroma_v_shift); // only one mv_scale
387 
388  av_assert2((tab_index>=0 && tab_index<4) || b_w==32);
389  if( (dx&3) || (dy&3)
390  || !(b_w == b_h || 2*b_w == b_h || b_w == 2*b_h)
391  || (b_w&(b_w-1))
392  || b_w == 1
393  || b_h == 1
394  || !s->plane[plane_index].fast_mc )
395  mc_block(&s->plane[plane_index], dst, src, stride, b_w, b_h, dx, dy);
396  else if(b_w==32){
397  int y;
398  for(y=0; y<b_h; y+=16){
399  s->h264qpel.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + y*stride, src + 3 + (y+3)*stride,stride);
400  s->h264qpel.put_h264_qpel_pixels_tab[0][dy+(dx>>2)](dst + 16 + y*stride, src + 19 + (y+3)*stride,stride);
401  }
402  }else if(b_w==b_h)
403  s->h264qpel.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst,src + 3 + 3*stride,stride);
404  else if(b_w==2*b_h){
405  s->h264qpel.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst ,src + 3 + 3*stride,stride);
406  s->h264qpel.put_h264_qpel_pixels_tab[tab_index+1][dy+(dx>>2)](dst+b_h,src + 3 + b_h + 3*stride,stride);
407  }else{
408  av_assert2(2*b_w==b_h);
409  s->h264qpel.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst ,src + 3 + 3*stride ,stride);
410  s->h264qpel.put_h264_qpel_pixels_tab[tab_index ][dy+(dx>>2)](dst+b_w*stride,src + 3 + 3*stride+b_w*stride,stride);
411  }
412  }
413 }
414 
415 #define mca(dx,dy,b_w)\
416 static void mc_block_hpel ## dx ## dy ## b_w(uint8_t *dst, const uint8_t *src, ptrdiff_t stride, int h){\
417  av_assert2(h==b_w);\
418  mc_block(NULL, dst, src-(HTAPS_MAX/2-1)-(HTAPS_MAX/2-1)*stride, stride, b_w, b_w, dx, dy);\
419 }
420 
421 mca( 0, 0,16)
422 mca( 8, 0,16)
423 mca( 0, 8,16)
424 mca( 8, 8,16)
425 mca( 0, 0,8)
426 mca( 8, 0,8)
427 mca( 0, 8,8)
428 mca( 8, 8,8)
429 
430 av_cold int ff_snow_common_init(AVCodecContext *avctx){
431  SnowContext *s = avctx->priv_data;
432  int width, height;
433  int i, j;
434 
435  s->avctx= avctx;
436  s->max_ref_frames=1; //just make sure it's not an invalid value in case of no initial keyframe
437  s->spatial_decomposition_count = 1;
438 
439  ff_me_cmp_init(&s->mecc, avctx);
440  ff_hpeldsp_init(&s->hdsp, avctx->flags);
441  ff_videodsp_init(&s->vdsp, 8);
442  ff_dwt_init(&s->dwt);
443  ff_h264qpel_init(&s->h264qpel, 8);
444 
445 #define mcf(dx,dy)\
446  s->qdsp.put_qpel_pixels_tab [0][dy+dx/4]=\
447  s->qdsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
448  s->h264qpel.put_h264_qpel_pixels_tab[0][dy+dx/4];\
449  s->qdsp.put_qpel_pixels_tab [1][dy+dx/4]=\
450  s->qdsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\
451  s->h264qpel.put_h264_qpel_pixels_tab[1][dy+dx/4];
452 
453  mcf( 0, 0)
454  mcf( 4, 0)
455  mcf( 8, 0)
456  mcf(12, 0)
457  mcf( 0, 4)
458  mcf( 4, 4)
459  mcf( 8, 4)
460  mcf(12, 4)
461  mcf( 0, 8)
462  mcf( 4, 8)
463  mcf( 8, 8)
464  mcf(12, 8)
465  mcf( 0,12)
466  mcf( 4,12)
467  mcf( 8,12)
468  mcf(12,12)
469 
470 #define mcfh(dx,dy)\
471  s->hdsp.put_pixels_tab [0][dy/4+dx/8]=\
472  s->hdsp.put_no_rnd_pixels_tab[0][dy/4+dx/8]=\
473  mc_block_hpel ## dx ## dy ## 16;\
474  s->hdsp.put_pixels_tab [1][dy/4+dx/8]=\
475  s->hdsp.put_no_rnd_pixels_tab[1][dy/4+dx/8]=\
476  mc_block_hpel ## dx ## dy ## 8;
477 
478  mcfh(0, 0)
479  mcfh(8, 0)
480  mcfh(0, 8)
481  mcfh(8, 8)
482 
483  init_qexp();
484 
485 // dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);
486 
487  width= s->avctx->width;
488  height= s->avctx->height;
489 
490  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->spatial_idwt_buffer, width, height * sizeof(IDWTELEM), fail);
491  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->spatial_dwt_buffer, width, height * sizeof(DWTELEM), fail); //FIXME this does not belong here
492  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_dwt_buffer, width, sizeof(DWTELEM), fail);
493  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_idwt_buffer, width, sizeof(IDWTELEM), fail);
494  FF_ALLOC_ARRAY_OR_GOTO(avctx, s->run_buffer, ((width + 1) >> 1), ((height + 1) >> 1) * sizeof(*s->run_buffer), fail);
495 
496  for(i=0; i<MAX_REF_FRAMES; i++) {
497  for(j=0; j<MAX_REF_FRAMES; j++)
498  ff_scale_mv_ref[i][j] = 256*(i+1)/(j+1);
499  s->last_picture[i] = av_frame_alloc();
500  if (!s->last_picture[i])
501  goto fail;
502  }
503 
504  s->mconly_picture = av_frame_alloc();
505  s->current_picture = av_frame_alloc();
506  if (!s->mconly_picture || !s->current_picture)
507  goto fail;
508 
509  return 0;
510 fail:
511  return AVERROR(ENOMEM);
512 }
513 
514 int ff_snow_common_init_after_header(AVCodecContext *avctx) {
515  SnowContext *s = avctx->priv_data;
516  int plane_index, level, orientation;
517  int ret, emu_buf_size;
518 
519  if(!s->scratchbuf) {
520  if ((ret = ff_get_buffer(s->avctx, s->mconly_picture,
521  AV_GET_BUFFER_FLAG_REF)) < 0)
522  return ret;
523  FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->scratchbuf, FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256), 7*MB_SIZE, fail);
524  emu_buf_size = FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256) * (2 * MB_SIZE + HTAPS_MAX - 1);
525  FF_ALLOC_OR_GOTO(avctx, s->emu_edge_buffer, emu_buf_size, fail);
526  }
527 
528  if(s->mconly_picture->format != avctx->pix_fmt) {
529  av_log(avctx, AV_LOG_ERROR, "pixel format changed\n");
530  return AVERROR_INVALIDDATA;
531  }
532 
533  for(plane_index=0; plane_index < s->nb_planes; plane_index++){
534  int w= s->avctx->width;
535  int h= s->avctx->height;
536 
537  if(plane_index){
538  w = FF_CEIL_RSHIFT(w, s->chroma_h_shift);
539  h = FF_CEIL_RSHIFT(h, s->chroma_v_shift);
540  }
541  s->plane[plane_index].width = w;
542  s->plane[plane_index].height= h;
543 
544  for(level=s->spatial_decomposition_count-1; level>=0; level--){
545  for(orientation=level ? 1 : 0; orientation<4; orientation++){
546  SubBand *b= &s->plane[plane_index].band[level][orientation];
547 
548  b->buf= s->spatial_dwt_buffer;
549  b->level= level;
550  b->stride= s->plane[plane_index].width << (s->spatial_decomposition_count - level);
551  b->width = (w + !(orientation&1))>>1;
552  b->height= (h + !(orientation>1))>>1;
553 
554  b->stride_line = 1 << (s->spatial_decomposition_count - level);
555  b->buf_x_offset = 0;
556  b->buf_y_offset = 0;
557 
558  if(orientation&1){
559  b->buf += (w+1)>>1;
560  b->buf_x_offset = (w+1)>>1;
561  }
562  if(orientation>1){
563  b->buf += b->stride>>1;
564  b->buf_y_offset = b->stride_line >> 1;
565  }
566  b->ibuf= s->spatial_idwt_buffer + (b->buf - s->spatial_dwt_buffer);
567 
568  if(level)
569  b->parent= &s->plane[plane_index].band[level-1][orientation];
570  //FIXME avoid this realloc
571  av_freep(&b->x_coeff);
572  b->x_coeff=av_mallocz_array(((b->width+1) * b->height+1), sizeof(x_and_coeff));
573  if (!b->x_coeff)
574  goto fail;
575  }
576  w= (w+1)>>1;
577  h= (h+1)>>1;
578  }
579  }
580 
581  return 0;
582 fail:
583  return AVERROR(ENOMEM);
584 }
585 
586 #define USE_HALFPEL_PLANE 0
587 
588 static int halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame){
589  int p,x,y;
590 
591  for(p=0; p < s->nb_planes; p++){
592  int is_chroma= !!p;
593  int w= is_chroma ? FF_CEIL_RSHIFT(s->avctx->width, s->chroma_h_shift) : s->avctx->width;
594  int h= is_chroma ? FF_CEIL_RSHIFT(s->avctx->height, s->chroma_v_shift) : s->avctx->height;
595  int ls= frame->linesize[p];
596  uint8_t *src= frame->data[p];
597 
598  halfpel[1][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
599  halfpel[2][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
600  halfpel[3][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
601  if (!halfpel[1][p] || !halfpel[2][p] || !halfpel[3][p]) {
602  av_freep(&halfpel[1][p]);
603  av_freep(&halfpel[2][p]);
604  av_freep(&halfpel[3][p]);
605  return AVERROR(ENOMEM);
606  }
607  halfpel[1][p] += EDGE_WIDTH * (1 + ls);
608  halfpel[2][p] += EDGE_WIDTH * (1 + ls);
609  halfpel[3][p] += EDGE_WIDTH * (1 + ls);
610 
611  halfpel[0][p]= src;
612  for(y=0; y<h; y++){
613  for(x=0; x<w; x++){
614  int i= y*ls + x;
615 
616  halfpel[1][p][i]= (20*(src[i] + src[i+1]) - 5*(src[i-1] + src[i+2]) + (src[i-2] + src[i+3]) + 16 )>>5;
617  }
618  }
619  for(y=0; y<h; y++){
620  for(x=0; x<w; x++){
621  int i= y*ls + x;
622 
623  halfpel[2][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;
624  }
625  }
626  src= halfpel[1][p];
627  for(y=0; y<h; y++){
628  for(x=0; x<w; x++){
629  int i= y*ls + x;
630 
631  halfpel[3][p][i]= (20*(src[i] + src[i+ls]) - 5*(src[i-ls] + src[i+2*ls]) + (src[i-2*ls] + src[i+3*ls]) + 16 )>>5;
632  }
633  }
634 
635 //FIXME border!
636  }
637  return 0;
638 }
639 
640 void ff_snow_release_buffer(AVCodecContext *avctx)
641 {
642  SnowContext *s = avctx->priv_data;
643  int i;
644 
645  if(s->last_picture[s->max_ref_frames-1]->data[0]){
646  av_frame_unref(s->last_picture[s->max_ref_frames-1]);
647  for(i=0; i<9; i++)
648  if(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3]) {
649  av_free(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] - EDGE_WIDTH*(1+s->current_picture->linesize[i%3]));
650  s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] = NULL;
651  }
652  }
653 }
654 
655 int ff_snow_frame_start(SnowContext *s){
656  AVFrame *tmp;
657  int i, ret;
658 
659  ff_snow_release_buffer(s->avctx);
660 
661  tmp= s->last_picture[s->max_ref_frames-1];
662  for(i=s->max_ref_frames-1; i>0; i--)
663  s->last_picture[i] = s->last_picture[i-1];
664  memmove(s->halfpel_plane+1, s->halfpel_plane, (s->max_ref_frames-1)*sizeof(void*)*4*4);
665  if(USE_HALFPEL_PLANE && s->current_picture->data[0]) {
666  if((ret = halfpel_interpol(s, s->halfpel_plane[0], s->current_picture)) < 0)
667  return ret;
668  }
669  s->last_picture[0] = s->current_picture;
670  s->current_picture = tmp;
671 
672  if(s->keyframe){
673  s->ref_frames= 0;
674  }else{
675  int i;
676  for(i=0; i<s->max_ref_frames && s->last_picture[i]->data[0]; i++)
677  if(i && s->last_picture[i-1]->key_frame)
678  break;
679  s->ref_frames= i;
680  if(s->ref_frames==0){
681  av_log(s->avctx,AV_LOG_ERROR, "No reference frames\n");
682  return AVERROR_INVALIDDATA;
683  }
684  }
685  if ((ret = ff_snow_get_buffer(s, s->current_picture)) < 0)
686  return ret;
687 
688  s->current_picture->key_frame= s->keyframe;
689 
690  return 0;
691 }
692 
693 av_cold void ff_snow_common_end(SnowContext *s)
694 {
695  int plane_index, level, orientation, i;
696 
697  av_freep(&s->spatial_dwt_buffer);
698  av_freep(&s->temp_dwt_buffer);
699  av_freep(&s->spatial_idwt_buffer);
700  av_freep(&s->temp_idwt_buffer);
701  av_freep(&s->run_buffer);
702 
703  s->m.me.temp= NULL;
704  av_freep(&s->m.me.scratchpad);
705  av_freep(&s->m.me.map);
706  av_freep(&s->m.me.score_map);
707  av_freep(&s->m.sc.obmc_scratchpad);
708 
709  av_freep(&s->block);
710  av_freep(&s->scratchbuf);
711  av_freep(&s->emu_edge_buffer);
712 
713  for(i=0; i<MAX_REF_FRAMES; i++){
714  av_freep(&s->ref_mvs[i]);
715  av_freep(&s->ref_scores[i]);
716  if(s->last_picture[i] && s->last_picture[i]->data[0]) {
717  av_assert0(s->last_picture[i]->data[0] != s->current_picture->data[0]);
718  }
719  av_frame_free(&s->last_picture[i]);
720  }
721 
722  for(plane_index=0; plane_index < MAX_PLANES; plane_index++){
723  for(level=MAX_DECOMPOSITIONS-1; level>=0; level--){
724  for(orientation=level ? 1 : 0; orientation<4; orientation++){
725  SubBand *b= &s->plane[plane_index].band[level][orientation];
726 
727  av_freep(&b->x_coeff);
728  }
729  }
730  }
731  av_frame_free(&s->mconly_picture);
732  av_frame_free(&s->current_picture);
733 }
MotionEstContext::scratchpad
uint8_t * scratchpad
data area for the ME algo, so that the ME does not need to malloc/free.
Definition: motion_est.h:46
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:936
SnowContext::m
MpegEncContext m
Definition: snow.h:182
SnowContext::mv_scale
int mv_scale
Definition: snow.h:160
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1511
ff_snow_frame_start
int ff_snow_frame_start(SnowContext *s)
Definition: snow.c:655
v
float v
Definition: avf_showspectrum.c:96
s
const char * s
Definition: avisynth_c.h:631
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
SnowContext::avctx
AVCodecContext * avctx
Definition: snow.h:115
SnowContext::block_max_depth
int block_max_depth
Definition: snow.h:167
SnowContext::mconly_picture
AVFrame * mconly_picture
Definition: snow.h:129
SnowContext::chroma_v_shift
int chroma_v_shift
Definition: snow.h:153
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
FF_ALLOCZ_ARRAY_OR_GOTO
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:156
ff_snow_inner_add_yblock
void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t **block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer *sb, int add, uint8_t *dst8)
Definition: snow.c:36
h
h
Definition: vp9dsp_template.c:2093
SnowContext::run_buffer
int * run_buffer
Definition: snow.h:150
BLOCK_INTRA
#define BLOCK_INTRA
Definition: snow.h:57
a0
#define a0
Definition: regdef.h:46
rangecoder.h
Range coder.
b
const char * b
Definition: vf_curves.c:109
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1722
mcf
#define mcf(dx, dy)
a1
#define a1
Definition: regdef.h:47
SnowContext::max_ref_frames
int max_ref_frames
Definition: snow.h:142
MotionEstContext::score_map
uint32_t * score_map
map to store the scores
Definition: motion_est.h:53
obmc4
static const uint8_t obmc4[16]
Definition: snowdata.h:96
ff_snow_common_init_after_header
int ff_snow_common_init_after_header(AVCodecContext *avctx)
Definition: snow.c:514
SnowContext::keyframe
int keyframe
Definition: snow.h:133
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void ff_snow_reset_contexts(SnowContext *s)
Definition: snow.c:96
IDWTELEM
short IDWTELEM
Definition: dirac_dwt.h:27
SnowContext::hdsp
HpelDSPContext hdsp
Definition: snow.h:118
SnowContext::mecc
MECmpContext mecc
Definition: snow.h:117
BlockNode
Definition: snow.h:50
SubBand::width
int width
Definition: diracdec.c:101
HTAPS_MAX
#define HTAPS_MAX
Definition: snow.h:75
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int av_codec_is_encoder(const AVCodec *codec)
Definition: utils.c:174
BlockNode::ref
uint8_t ref
Definition: snow.h:53
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
VideoDSPContext::emulated_edge_mc
void(* emulated_edge_mc)(uint8_t *dst, const uint8_t *src, ptrdiff_t dst_linesize, ptrdiff_t src_linesize, int block_w, int block_h, int src_x, int src_y, int w, int h)
Copy a rectangular area of samples to a temporary buffer and replicate the border samples...
Definition: videodsp.h:63
ff_dwt_init
av_cold void ff_dwt_init(SnowDWTContext *c)
Definition: snow_dwt.c:850
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#define a3
Definition: regdef.h:49
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int b_height
Definition: snow.h:166
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ScratchpadContext sc
Definition: mpegvideo.h:209
uint8_t
uint8_t
Definition: audio_convert.c:194
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int16_t mx
Definition: snow.h:51
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#define av_cold
Definition: attributes.h:74
FRAC_BITS
#define FRAC_BITS
Definition: g729postfilter.c:33
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
opt.h
AVOptions.
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:94
SnowContext::ref_scores
uint32_t * ref_scores[MAX_REF_FRAMES]
Definition: snow.h:145
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static AVFrame * frame
Definition: demuxing_decoding.c:53
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int16_t my
Definition: snow.h:52
snow_dwt.h
lrintf
#define lrintf(x)
Definition: libm_mips.h:70
ff_snow_release_buffer
void ff_snow_release_buffer(AVCodecContext *avctx)
Definition: snow.c:640
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SnowContext::block
BlockNode * block
Definition: snow.h:171
EDGE_WIDTH
#define EDGE_WIDTH
Definition: mpegpicture.h:33
mca
#define mca(dx, dy, b_w)
Definition: snow.c:415
SnowContext::dwt
SnowDWTContext dwt
Definition: snow.h:123
AVFrame::width
int width
width and height of the video frame
Definition: frame.h:220
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
SnowContext::ref_mvs
int16_t(*[MAX_REF_FRAMES] ref_mvs)[2]
Definition: snow.h:144
MB_SIZE
#define MB_SIZE
Definition: cinepakenc.c:86
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static int halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame)
Definition: snow.c:588
AVERROR
#define AVERROR(e)
Definition: error.h:43
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void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
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int diag_mc
Definition: snow.h:105
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const char * r
Definition: vf_curves.c:107
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#define mcfh(dx, dy)
SubBand::stride
int stride
Definition: diracdec.c:100
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static const uint8_t offset[127][2]
Definition: vf_spp.c:92
FFMAX
#define FFMAX(a, b)
Definition: common.h:79
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Libavcodec external API header.
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#define fail()
Definition: checkasm.h:57
H264QpelContext::put_h264_qpel_pixels_tab
qpel_mc_func put_h264_qpel_pixels_tab[4][16]
Definition: h264qpel.h:28
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uint8_t * emu_edge_buffer
Definition: snow.h:185
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uint8_t color[3]
Definition: snow.h:54
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int ref_frames
Definition: snow.h:143
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av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
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x_and_coeff * x_coeff
Definition: snow.h:93
USE_HALFPEL_PLANE
#define USE_HALFPEL_PLANE
Definition: snow.c:586
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av_cold void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:38
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float y
Definition: avf_showspectrum.c:96
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static void mc_block(Plane *p, uint8_t *dst, const uint8_t *src, int stride, int b_w, int b_h, int dx, int dy)
Definition: snow.c:134
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static av_cold void init_qexp(void)
Definition: snow.c:125
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1681
FF_CEIL_RSHIFT
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
SnowContext::scratchbuf
uint8_t * scratchbuf
Definition: snow.h:184
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#define a2
Definition: regdef.h:48
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Plane plane[MAX_PLANES]
Definition: snow.h:170
MAX_PLANES
#define MAX_PLANES
Definition: ffv1.h:50
SnowContext::b_width
int b_width
Definition: snow.h:165
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MotionEstContext me
Definition: mpegvideo.h:290
SnowContext::chroma_h_shift
int chroma_h_shift
Definition: snow.h:152
SnowContext::vdsp
VideoDSPContext vdsp
Definition: snow.h:120
SnowContext::halfpel_plane
uint8_t * halfpel_plane[MAX_REF_FRAMES][4][4]
Definition: snow.h:128
Plane::band
SubBand band[MAX_DWT_LEVELS][4]
Definition: diracdec.c:134
me_cmp.h
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:232
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uint8_t block_state[128+32 *128]
Definition: snow.h:132
ff_scale_mv_ref
int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES]
Definition: snowdata.h:129
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#define src1
Definition: h264pred.c:139
a5
#define a5
Definition: regdef.h:51
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int ff_snow_get_buffer(SnowContext *s, AVFrame *frame)
Definition: snow.c:69
src
AVS_Value src
Definition: avisynth_c.h:482
LOG2_OBMC_MAX
#define LOG2_OBMC_MAX
Definition: snow.h:48
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int spatial_decomposition_count
Definition: snow.h:139
DWTELEM
int DWTELEM
Definition: dirac_dwt.h:26
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
AVCodecContext
main external API structure.
Definition: avcodec.h:1502
Plane::hcoeff
int8_t hcoeff[HTAPS_MAX/2]
Definition: snow.h:104
QROOT
#define QROOT
Definition: snow.h:43
ff_snow_pred_block
void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride, int sx, int sy, int b_w, int b_h, const BlockNode *block, int plane_index, int w, int h)
Definition: snow.c:327
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int ff_snow_alloc_blocks(SnowContext *s)
Definition: snow.c:110
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:1040
SubBand::parent
struct SubBand * parent
Definition: diracdec.c:105
height
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
SnowContext::nb_planes
int nb_planes
Definition: snow.h:169
SubBand::buf_y_offset
int buf_y_offset
Definition: snow.h:91
SnowContext::temp_dwt_buffer
DWTELEM * temp_dwt_buffer
Definition: snow.h:147
SnowContext::header_state
uint8_t header_state[32]
Definition: snow.h:131
weight
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1299
ff_snow_common_init
int ff_snow_common_init(AVCodecContext *avctx)
av_frame_unref
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:464
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
SnowContext::current_picture
AVFrame * current_picture
Definition: snow.h:126
level
uint8_t level
Definition: svq3.c:150
MAX_DECOMPOSITIONS
#define MAX_DECOMPOSITIONS
Definition: dirac_dwt.h:30
FF_ALLOC_ARRAY_OR_GOTO
#define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
Definition: internal.h:147
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
MID_STATE
#define MID_STATE
Definition: snow.h:39
internal.h
common internal api header.
SnowContext::temp_idwt_buffer
IDWTELEM * temp_idwt_buffer
Definition: snow.h:149
SnowContext::h264qpel
H264QpelContext h264qpel
Definition: snow.h:121
FF_ALLOC_OR_GOTO
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)
Definition: internal.h:129
slice_buffer_get_line
#define slice_buffer_get_line(slice_buf, line_num)
Definition: snow_dwt.h:87
LOG2_MB_SIZE
#define LOG2_MB_SIZE
Definition: snow.h:72
SnowContext::spatial_dwt_buffer
DWTELEM * spatial_dwt_buffer
Definition: snow.h:146
SubBand::state
uint8_t state[7+512][32]
Definition: snow.h:95
MotionEstContext::map
uint32_t * map
map to avoid duplicate evaluations
Definition: motion_est.h:52
SnowContext::spatial_idwt_buffer
IDWTELEM * spatial_idwt_buffer
Definition: snow.h:148
a4
#define a4
Definition: regdef.h:50
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1544
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
MC_STRIDE
#define MC_STRIDE(x)
SubBand::buf_x_offset
int buf_x_offset
Definition: snow.h:90
ScratchpadContext::obmc_scratchpad
uint8_t * obmc_scratchpad
Definition: mpegpicture.h:38
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
SubBand::height
int height
Definition: diracdec.c:102
SubBand::ibuf
IDWTELEM * ibuf
Definition: diracdec.c:104
Plane::fast_mc
int fast_mc
Definition: snow.h:106
Plane::width
int width
Definition: diracdec.c:113
ff_snow_common_end
av_cold void ff_snow_common_end(SnowContext *s)
Definition: snow.c:693
av_mallocz_array
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:228
ff_qexp
uint8_t ff_qexp[QROOT]
Definition: snowdata.h:128
SubBand::buf
DWTELEM * buf
Definition: snow.h:88
AVFrame::height
int height
Definition: frame.h:220
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
MAX_REF_FRAMES
#define MAX_REF_FRAMES
Definition: snow.h:46
MotionEstContext::temp
uint8_t * temp
Definition: motion_est.h:50
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
BlockNode::type
uint8_t type
Definition: snow.h:55
stride
#define stride
slice_buffer
Used to minimize the amount of memory used in order to optimize cache performance.
Definition: snow_dwt.h:42
SnowContext::last_picture
AVFrame * last_picture[MAX_REF_FRAMES]
Definition: snow.h:127
Plane::height
int height
Definition: diracdec.c:114
x_and_coeff
Definition: snow.h:77
ff_h264qpel_init
av_cold void ff_h264qpel_init(H264QpelContext *c, int bit_depth)
Definition: h264qpel.c:49
AV_GET_BUFFER_FLAG_REF
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:1216
SubBand::level
int level
Definition: diracdec.c:98
a
a
Definition: h264pred_template.c:468
SubBand::stride_line
int stride_line
Stride measured in lines, not pixels.
Definition: snow.h:92
width
static int width
Definition: demuxing_decoding.c:39
block
static int16_t block[64]
Definition: dct-test.c:110
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