FFmpeg
snow.c
Go to the documentation of this file.
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= AV_CEIL_RSHIFT(s->avctx->width, LOG2_MB_SIZE);
112  int h= AV_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  if (!FF_ALLOCZ_TYPED_ARRAY(s->spatial_idwt_buffer, width * height) ||
491  !FF_ALLOCZ_TYPED_ARRAY(s->spatial_dwt_buffer, width * height) || //FIXME this does not belong here
492  !FF_ALLOCZ_TYPED_ARRAY(s->temp_dwt_buffer, width) ||
493  !FF_ALLOCZ_TYPED_ARRAY(s->temp_idwt_buffer, width) ||
494  !FF_ALLOCZ_TYPED_ARRAY(s->run_buffer, ((width + 1) >> 1) * ((height + 1) >> 1)))
495  return AVERROR(ENOMEM);
496 
497  for(i=0; i<MAX_REF_FRAMES; i++) {
498  for(j=0; j<MAX_REF_FRAMES; j++)
499  ff_scale_mv_ref[i][j] = 256*(i+1)/(j+1);
500  s->last_picture[i] = av_frame_alloc();
501  if (!s->last_picture[i])
502  return AVERROR(ENOMEM);
503  }
504 
505  s->mconly_picture = av_frame_alloc();
506  s->current_picture = av_frame_alloc();
507  if (!s->mconly_picture || !s->current_picture)
508  return AVERROR(ENOMEM);
509 
510  return 0;
511 }
512 
513 int ff_snow_common_init_after_header(AVCodecContext *avctx) {
514  SnowContext *s = avctx->priv_data;
515  int plane_index, level, orientation;
516  int ret, emu_buf_size;
517 
518  if(!s->scratchbuf) {
519  if ((ret = ff_get_buffer(s->avctx, s->mconly_picture,
520  AV_GET_BUFFER_FLAG_REF)) < 0)
521  return ret;
522  emu_buf_size = FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256) * (2 * MB_SIZE + HTAPS_MAX - 1);
523  if (!FF_ALLOCZ_TYPED_ARRAY(s->scratchbuf, FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256) * 7 * MB_SIZE) ||
524  !FF_ALLOCZ_TYPED_ARRAY(s->emu_edge_buffer, emu_buf_size))
525  return AVERROR(ENOMEM);
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 = AV_CEIL_RSHIFT(w, s->chroma_h_shift);
539  h = AV_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  return AVERROR(ENOMEM);
575  }
576  w= (w+1)>>1;
577  h= (h+1)>>1;
578  }
579  }
580 
581  return 0;
582 }
583 
584 #define USE_HALFPEL_PLANE 0
585 
586 static int halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame){
587  int p,x,y;
588 
589  for(p=0; p < s->nb_planes; p++){
590  int is_chroma= !!p;
591  int w= is_chroma ? AV_CEIL_RSHIFT(s->avctx->width, s->chroma_h_shift) : s->avctx->width;
592  int h= is_chroma ? AV_CEIL_RSHIFT(s->avctx->height, s->chroma_v_shift) : s->avctx->height;
593  int ls= frame->linesize[p];
594  uint8_t *src= frame->data[p];
595 
596  halfpel[1][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
597  halfpel[2][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
598  halfpel[3][p] = av_malloc_array(ls, (h + 2 * EDGE_WIDTH));
599  if (!halfpel[1][p] || !halfpel[2][p] || !halfpel[3][p]) {
600  av_freep(&halfpel[1][p]);
601  av_freep(&halfpel[2][p]);
602  av_freep(&halfpel[3][p]);
603  return AVERROR(ENOMEM);
604  }
605  halfpel[1][p] += EDGE_WIDTH * (1 + ls);
606  halfpel[2][p] += EDGE_WIDTH * (1 + ls);
607  halfpel[3][p] += EDGE_WIDTH * (1 + ls);
608 
609  halfpel[0][p]= src;
610  for(y=0; y<h; y++){
611  for(x=0; x<w; x++){
612  int i= y*ls + x;
613 
614  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;
615  }
616  }
617  for(y=0; y<h; y++){
618  for(x=0; x<w; x++){
619  int i= y*ls + x;
620 
621  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;
622  }
623  }
624  src= halfpel[1][p];
625  for(y=0; y<h; y++){
626  for(x=0; x<w; x++){
627  int i= y*ls + x;
628 
629  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;
630  }
631  }
632 
633 //FIXME border!
634  }
635  return 0;
636 }
637 
638 void ff_snow_release_buffer(AVCodecContext *avctx)
639 {
640  SnowContext *s = avctx->priv_data;
641  int i;
642 
643  if(s->last_picture[s->max_ref_frames-1]->data[0]){
644  av_frame_unref(s->last_picture[s->max_ref_frames-1]);
645  for(i=0; i<9; i++)
646  if(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3]) {
647  av_free(s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] - EDGE_WIDTH*(1+s->current_picture->linesize[i%3]));
648  s->halfpel_plane[s->max_ref_frames-1][1+i/3][i%3] = NULL;
649  }
650  }
651 }
652 
653 int ff_snow_frame_start(SnowContext *s){
654  AVFrame *tmp;
655  int i, ret;
656 
657  ff_snow_release_buffer(s->avctx);
658 
659  tmp= s->last_picture[s->max_ref_frames-1];
660  for(i=s->max_ref_frames-1; i>0; i--)
661  s->last_picture[i] = s->last_picture[i-1];
662  memmove(s->halfpel_plane+1, s->halfpel_plane, (s->max_ref_frames-1)*sizeof(void*)*4*4);
663  if(USE_HALFPEL_PLANE && s->current_picture->data[0]) {
664  if((ret = halfpel_interpol(s, s->halfpel_plane[0], s->current_picture)) < 0)
665  return ret;
666  }
667  s->last_picture[0] = s->current_picture;
668  s->current_picture = tmp;
669 
670  if(s->keyframe){
671  s->ref_frames= 0;
672  }else{
673  int i;
674  for(i=0; i<s->max_ref_frames && s->last_picture[i]->data[0]; i++)
675  if(i && s->last_picture[i-1]->key_frame)
676  break;
677  s->ref_frames= i;
678  if(s->ref_frames==0){
679  av_log(s->avctx,AV_LOG_ERROR, "No reference frames\n");
680  return AVERROR_INVALIDDATA;
681  }
682  }
683  if ((ret = ff_snow_get_buffer(s, s->current_picture)) < 0)
684  return ret;
685 
686  s->current_picture->key_frame= s->keyframe;
687 
688  return 0;
689 }
690 
691 av_cold void ff_snow_common_end(SnowContext *s)
692 {
693  int plane_index, level, orientation, i;
694 
695  av_freep(&s->spatial_dwt_buffer);
696  av_freep(&s->temp_dwt_buffer);
697  av_freep(&s->spatial_idwt_buffer);
698  av_freep(&s->temp_idwt_buffer);
699  av_freep(&s->run_buffer);
700 
701  s->m.me.temp= NULL;
702  av_freep(&s->m.me.scratchpad);
703  av_freep(&s->m.me.map);
704  av_freep(&s->m.me.score_map);
705  av_freep(&s->m.sc.obmc_scratchpad);
706 
707  av_freep(&s->block);
708  av_freep(&s->scratchbuf);
709  av_freep(&s->emu_edge_buffer);
710 
711  for(i=0; i<MAX_REF_FRAMES; i++){
712  av_freep(&s->ref_mvs[i]);
713  av_freep(&s->ref_scores[i]);
714  if(s->last_picture[i] && s->last_picture[i]->data[0]) {
715  av_assert0(s->last_picture[i]->data[0] != s->current_picture->data[0]);
716  }
717  av_frame_free(&s->last_picture[i]);
718  }
719 
720  for(plane_index=0; plane_index < MAX_PLANES; plane_index++){
721  for(level=MAX_DECOMPOSITIONS-1; level>=0; level--){
722  for(orientation=level ? 1 : 0; orientation<4; orientation++){
723  SubBand *b= &s->plane[plane_index].band[level][orientation];
724 
725  av_freep(&b->x_coeff);
726  }
727  }
728  }
729  av_frame_free(&s->mconly_picture);
730  av_frame_free(&s->current_picture);
731 }
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:52
ff_me_cmp_init
av_cold void ff_me_cmp_init(MECmpContext *c, AVCodecContext *avctx)
Definition: me_cmp.c:1035
SnowContext::m
MpegEncContext m
Definition: snow.h:183
SnowContext::mv_scale
int mv_scale
Definition: snow.h:160
ff_videodsp_init
av_cold void ff_videodsp_init(VideoDSPContext *ctx, int bpc)
Definition: videodsp.c:38
NULL
#define NULL
Definition: coverity.c:32
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:535
ff_snow_frame_start
int ff_snow_frame_start(SnowContext *s)
Definition: snow.c:653
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
SnowContext::avctx
AVCodecContext * avctx
Definition: snow.h:116
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:308
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:2038
av_codec_is_encoder
int av_codec_is_encoder(const AVCodec *codec)
Definition: utils.c:95
ret
ret
Definition: filter_design.txt:187
SnowContext::run_buffer
int * run_buffer
Definition: snow.h:150
BLOCK_INTRA
#define BLOCK_INTRA
Intra block, inter otherwise.
Definition: snow.h:58
a0
#define a0
Definition: regdef.h:46
rangecoder.h
Range coder.
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
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:59
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:513
SubBand::stride
ptrdiff_t stride
Definition: cfhd.h:107
SnowContext::keyframe
int keyframe
Definition: snow.h:133
ff_snow_reset_contexts
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:119
SnowContext::mecc
MECmpContext mecc
Definition: snow.h:118
BlockNode
Definition: snow.h:51
SubBand::width
int width
Definition: cfhd.h:109
HTAPS_MAX
#define HTAPS_MAX
Definition: snow.h:76
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
BlockNode::ref
uint8_t ref
Reference frame index.
Definition: snow.h:54
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ff_dwt_init
av_cold void ff_dwt_init(SnowDWTContext *c)
Definition: snow_dwt.c:850
a3
#define a3
Definition: regdef.h:49
SnowContext::b_height
int b_height
Definition: snow.h:166
MpegEncContext::sc
ScratchpadContext sc
Definition: mpegvideo.h:202
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
uint8_t
uint8_t
Definition: audio_convert.c:194
BlockNode::mx
int16_t mx
Motion vector component X, see mv_scale.
Definition: snow.h:52
av_cold
#define av_cold
Definition: attributes.h:88
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:190
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
opt.h
AVOptions.
color
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:92
SnowContext::ref_scores
uint32_t * ref_scores[MAX_REF_FRAMES]
Definition: snow.h:145
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:84
height
#define height
BlockNode::my
int16_t my
Motion vector component Y, see mv_scale.
Definition: snow.h:53
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:638
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SubBand
Definition: cfhd.h:106
SnowContext::block
BlockNode * block
Definition: snow.h:171
EDGE_WIDTH
#define EDGE_WIDTH
Definition: mpegpicture.h:33
src
#define src
Definition: vp8dsp.c:254
mca
#define mca(dx, dy, b_w)
Definition: snow.c:415
SnowContext::dwt
SnowDWTContext dwt
Definition: snow.h:124
AVFrame::width
int width
Definition: frame.h:366
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
SnowContext::ref_mvs
int16_t(*[MAX_REF_FRAMES] ref_mvs)[2]
Definition: snow.h:144
MB_SIZE
#define MB_SIZE
Definition: cinepakenc.c:54
Plane::band
SubBand band[DWT_LEVELS_3D][4]
Definition: cfhd.h:127
halfpel_interpol
static int halfpel_interpol(SnowContext *s, uint8_t *halfpel[4][4], AVFrame *frame)
Definition: snow.c:586
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
Plane::diag_mc
int diag_mc
Definition: snow.h:106
r
const char * r
Definition: vf_curves.c:114
mcfh
#define mcfh(dx, dy)
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
H264QpelContext::put_h264_qpel_pixels_tab
qpel_mc_func put_h264_qpel_pixels_tab[4][16]
Definition: h264qpel.h:28
SnowContext::emu_edge_buffer
uint8_t * emu_edge_buffer
Definition: snow.h:186
BlockNode::color
uint8_t color[3]
Color for intra.
Definition: snow.h:55
SnowContext::ref_frames
int ref_frames
Definition: snow.h:143
ff_hpeldsp_init
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
SubBand::x_coeff
x_and_coeff * x_coeff
Definition: snow.h:94
USE_HALFPEL_PLANE
#define USE_HALFPEL_PLANE
Definition: snow.c:584
b
#define b
Definition: input.c:41
mc_block
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
width
#define width
init_qexp
static av_cold void init_qexp(void)
Definition: snow.c:125
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:699
w
uint8_t w
Definition: llviddspenc.c:38
SnowContext::scratchbuf
uint8_t * scratchbuf
Definition: snow.h:185
a2
#define a2
Definition: regdef.h:48
SnowContext::plane
Plane plane[MAX_PLANES]
Definition: snow.h:170
MAX_PLANES
#define MAX_PLANES
Definition: ffv1.h:49
SnowContext::b_width
int b_width
Definition: snow.h:165
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:255
s
#define s(width, name)
Definition: cbs_vp9.c:257
MpegEncContext::me
MotionEstContext me
Definition: mpegvideo.h:282
SnowContext::chroma_h_shift
int chroma_h_shift
Definition: snow.h:152
SnowContext::vdsp
VideoDSPContext vdsp
Definition: snow.h:121
SnowContext::halfpel_plane
uint8_t * halfpel_plane[MAX_REF_FRAMES][4][4]
Definition: snow.h:128
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:381
SnowContext::block_state
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
src1
#define src1
Definition: h264pred.c:139
a5
#define a5
Definition: regdef.h:51
ff_snow_get_buffer
int ff_snow_get_buffer(SnowContext *s, AVFrame *frame)
Definition: snow.c:69
avcodec.h
Libavcodec external API header.
LOG2_OBMC_MAX
#define LOG2_OBMC_MAX
Definition: snow.h:49
SnowContext::spatial_decomposition_count
int spatial_decomposition_count
Definition: snow.h:139
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
AVCodecContext
main external API structure.
Definition: avcodec.h:526
Plane::hcoeff
int8_t hcoeff[HTAPS_MAX/2]
Definition: snow.h:105
QROOT
#define QROOT
Definition: snow.h:44
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
ff_snow_alloc_blocks
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: decode.c:1854
SubBand::ibuf
uint8_t * ibuf
Definition: diracdec.c:98
SubBand::parent
struct SubBand * parent
Definition: diracdec.c:99
SnowContext::nb_planes
int nb_planes
Definition: snow.h:169
SubBand::buf_y_offset
int buf_y_offset
Definition: snow.h:92
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:1560
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:566
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
SnowContext::current_picture
AVFrame * current_picture
Definition: snow.h:126
level
uint8_t level
Definition: svq3.c:209
MAX_DECOMPOSITIONS
#define MAX_DECOMPOSITIONS
Definition: dirac_dwt.h:30
stride
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:104
MID_STATE
#define MID_STATE
Definition: snow.h:40
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:122
slice_buffer_get_line
#define slice_buffer_get_line(slice_buf, line_num)
Definition: snow_dwt.h:89
LOG2_MB_SIZE
#define LOG2_MB_SIZE
Definition: snow.h:73
SnowContext::spatial_dwt_buffer
DWTELEM * spatial_dwt_buffer
Definition: snow.h:146
SubBand::state
uint8_t state[7+512][32]
Definition: snow.h:96
MotionEstContext::map
uint32_t * map
map to avoid duplicate evaluations
Definition: motion_est.h:58
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:553
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:91
ScratchpadContext::obmc_scratchpad
uint8_t * obmc_scratchpad
Definition: mpegpicture.h:38
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:386
SubBand::height
int height
Definition: cfhd.h:111
Plane::fast_mc
int fast_mc
Definition: snow.h:107
Plane::width
int width
Definition: cfhd.h:115
ff_snow_common_end
av_cold void ff_snow_common_end(SnowContext *s)
Definition: snow.c:691
ff_qexp
uint8_t ff_qexp[QROOT]
Definition: snowdata.h:128
SubBand::buf
DWTELEM * buf
Definition: snow.h:89
AVFrame::height
int height
Definition: frame.h:366
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
MAX_REF_FRAMES
#define MAX_REF_FRAMES
Definition: snow.h:47
MotionEstContext::temp
uint8_t * temp
Definition: motion_est.h:56
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
FF_ALLOCZ_TYPED_ARRAY
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem)
Definition: internal.h:141
BlockNode::type
uint8_t type
Bitfield of BLOCK_*.
Definition: snow.h:56
stride
#define stride
slice_buffer
Used to minimize the amount of memory used in order to optimize cache performance.
Definition: snow_dwt.h:44
SnowContext::last_picture
AVFrame * last_picture[MAX_REF_FRAMES]
Definition: snow.h:127
Plane::height
int height
Definition: cfhd.h:116
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
x_and_coeff
Definition: snow.h:78
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:509
i
int i
Definition: input.c:407
Plane
Definition: cfhd.h:114
SubBand::level
int level
Definition: diracdec.c:91
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:190
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
SubBand::stride_line
int stride_line
Stride measured in lines, not pixels.
Definition: snow.h:93
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
Generated on Mon Aug 10 2020 19:21:45 for FFmpeg by   doxygen 1.8.11