FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/snow.h
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 292 309 94.5%
Branches: 194 210 92.4%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef AVCODEC_SNOW_H
23 #define AVCODEC_SNOW_H
24
25 #include "libavutil/motion_vector.h"
26
27 #include "hpeldsp.h"
28 #include "me_cmp.h"
29 #include "qpeldsp.h"
30 #include "snow_dwt.h"
31
32 #include "rangecoder.h"
33 #include "mathops.h"
34
35 #include "mpegvideo.h"
36 #include "h264qpel.h"
37
38 #define FF_ME_ITER 3
39
40 #define MID_STATE 128
41
42 #define MAX_PLANES 4
43 #define QSHIFT 5
44 #define QROOT (1<<QSHIFT)
45 #define LOSSLESS_QLOG -128
46 #define FRAC_BITS 4
47 #define MAX_REF_FRAMES 8
48
49 #define LOG2_OBMC_MAX 8
50 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
51 typedef struct BlockNode{
52 int16_t mx; ///< Motion vector component X, see mv_scale
53 int16_t my; ///< Motion vector component Y, see mv_scale
54 uint8_t ref; ///< Reference frame index
55 uint8_t color[3]; ///< Color for intra
56 uint8_t type; ///< Bitfield of BLOCK_*
57 //#define TYPE_SPLIT 1
58 #define BLOCK_INTRA 1 ///< Intra block, inter otherwise
59 #define BLOCK_OPT 2 ///< Block needs no checks in this round of iterative motion estiation
60 //#define TYPE_NOCOLOR 4
61 uint8_t level; //FIXME merge into type?
62 }BlockNode;
63
64 static const BlockNode null_block= { //FIXME add border maybe
65 .color= {128,128,128},
66 .mx= 0,
67 .my= 0,
68 .ref= 0,
69 .type= 0,
70 .level= 0,
71 };
72
73 #define LOG2_MB_SIZE 4
74 #define MB_SIZE (1<<LOG2_MB_SIZE)
75 #define ENCODER_EXTRA_BITS 4
76 #define HTAPS_MAX 8
77
78 typedef struct x_and_coeff{
79 int16_t x;
80 uint16_t coeff;
81 } x_and_coeff;
82
83 typedef struct SubBand{
84 int level;
85 int stride;
86 int width;
87 int height;
88 int qlog; ///< log(qscale)/log[2^(1/6)]
89 DWTELEM *buf;
90 IDWTELEM *ibuf;
91 int buf_x_offset;
92 int buf_y_offset;
93 int stride_line; ///< Stride measured in lines, not pixels.
94 x_and_coeff * x_coeff;
95 struct SubBand *parent;
96 uint8_t state[/*7*2*/ 7 + 512][32];
97 }SubBand;
98
99 typedef struct Plane{
100 int width;
101 int height;
102 SubBand band[MAX_DECOMPOSITIONS][4];
103
104 int htaps;
105 int8_t hcoeff[HTAPS_MAX/2];
106 int diag_mc;
107 int fast_mc;
108
109 int last_htaps;
110 int8_t last_hcoeff[HTAPS_MAX/2];
111 int last_diag_mc;
112 }Plane;
113
114 typedef struct SnowContext{
115 AVClass *class;
116 AVCodecContext *avctx;
117 RangeCoder c;
118 MECmpContext mecc;
119 HpelDSPContext hdsp;
120 QpelDSPContext qdsp;
121 VideoDSPContext vdsp;
122 H264QpelContext h264qpel;
123 MpegvideoEncDSPContext mpvencdsp;
124 SnowDWTContext dwt;
125 AVFrame *input_picture; ///< new_picture with the internal linesizes
126 AVFrame *current_picture;
127 AVFrame *last_picture[MAX_REF_FRAMES];
128 uint8_t *halfpel_plane[MAX_REF_FRAMES][4][4];
129 AVFrame *mconly_picture;
130 // uint8_t q_context[16];
131 uint8_t header_state[32];
132 uint8_t block_state[128 + 32*128];
133 int keyframe;
134 int always_reset;
135 int version;
136 int spatial_decomposition_type;
137 int last_spatial_decomposition_type;
138 int temporal_decomposition_type;
139 int spatial_decomposition_count;
140 int last_spatial_decomposition_count;
141 int temporal_decomposition_count;
142 int max_ref_frames;
143 int ref_frames;
144 int16_t (*ref_mvs[MAX_REF_FRAMES])[2];
145 uint32_t *ref_scores[MAX_REF_FRAMES];
146 DWTELEM *spatial_dwt_buffer;
147 DWTELEM *temp_dwt_buffer;
148 IDWTELEM *spatial_idwt_buffer;
149 IDWTELEM *temp_idwt_buffer;
150 int *run_buffer;
151 int colorspace_type;
152 int chroma_h_shift;
153 int chroma_v_shift;
154 int spatial_scalability;
155 int qlog;
156 int last_qlog;
157 int lambda;
158 int lambda2;
159 int pass1_rc;
160 int mv_scale;
161 int last_mv_scale;
162 int qbias;
163 int last_qbias;
164 #define QBIAS_SHIFT 3
165 int b_width;
166 int b_height;
167 int block_max_depth;
168 int last_block_max_depth;
169 int nb_planes;
170 Plane plane[MAX_PLANES];
171 BlockNode *block;
172 #define ME_CACHE_SIZE 1024
173 unsigned me_cache[ME_CACHE_SIZE];
174 unsigned me_cache_generation;
175 slice_buffer sb;
176 int memc_only;
177 int no_bitstream;
178 int intra_penalty;
179 int motion_est;
180 int iterative_dia_size;
181 int scenechange_threshold;
182
183 MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to eventually make the motion estimation independent of MpegEncContext, so this will be removed then (FIXME/XXX)
184
185 uint8_t *scratchbuf;
186 uint8_t *emu_edge_buffer;
187
188 AVMotionVector *avmv;
189 int avmv_index;
190 uint64_t encoding_error[AV_NUM_DATA_POINTERS];
191
192 int pred;
193 }SnowContext;
194
195 /* Tables */
196 extern const uint8_t * const ff_obmc_tab[4];
197 extern const uint8_t ff_qexp[QROOT];
198 extern int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES];
199
200 /* C bits used by mmx/sse2/altivec */
201
202 248 static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
203 248 (*i) = (width) - 2;
204
205
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 248 if (width & 1){
206 ✗ low[(*i)+1] = low[((*i)+1)>>1];
207 ✗ (*i)--;
208 }
209 248 }
210
211 static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){
212 for (; (*i)>=0; (*i)-=2){
213 low[(*i)+1] = high[(*i)>>1];
214 low[*i] = low[(*i)>>1];
215 }
216 }
217
218 744 static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
219
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 5736 for(; i<w; i++){
220 4992 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
221 }
222
223
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 744 if((width^lift_high)&1){
224 496 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
225 }
226 744 }
227
228 248 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
229
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 1912 for(; i<w; i++){
230 1664 dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
231 }
232
233
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 248 if(width&1){
234 ✗ dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
235 }
236 248 }
237
238 /* common code */
239
240 int ff_snow_common_init(AVCodecContext *avctx);
241 int ff_snow_common_init_after_header(AVCodecContext *avctx);
242 void ff_snow_common_end(SnowContext *s);
243 void ff_snow_release_buffer(AVCodecContext *avctx);
244 void ff_snow_reset_contexts(SnowContext *s);
245 int ff_snow_alloc_blocks(SnowContext *s);
246 int ff_snow_frame_start(SnowContext *s);
247 void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride,
248 int sx, int sy, int b_w, int b_h, const BlockNode *block,
249 int plane_index, int w, int h);
250 int ff_snow_get_buffer(SnowContext *s, AVFrame *frame);
251 /* common inline functions */
252 //XXX doublecheck all of them should stay inlined
253
254 1565346 static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
255 const BlockNode *left, const BlockNode *top, const BlockNode *tr){
256
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 1565346 if(s->ref_frames == 1){
257 1565346 *mx = mid_pred(left->mx, top->mx, tr->mx);
258 1565346 *my = mid_pred(left->my, top->my, tr->my);
259 }else{
260 ✗ const int *scale = ff_scale_mv_ref[ref];
261 ✗ *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8,
262 ✗ (top ->mx * scale[top ->ref] + 128) >>8,
263 ✗ (tr ->mx * scale[tr ->ref] + 128) >>8);
264 ✗ *my = mid_pred((left->my * scale[left->ref] + 128) >>8,
265 ✗ (top ->my * scale[top ->ref] + 128) >>8,
266 ✗ (tr ->my * scale[tr ->ref] + 128) >>8);
267 }
268 1565346 }
269
270 12015986 static av_always_inline int same_block(BlockNode *a, BlockNode *b){
271
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 12015986 if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
272 86127 return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
273 }else{
274 11929859 return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA));
275 }
276 }
277
278 //FIXME name cleanup (b_w, block_w, b_width stuff)
279 //XXX should we really inline it?
280 2357745 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){
281 2357745 const int b_width = s->b_width << s->block_max_depth;
282 2357745 const int b_height= s->b_height << s->block_max_depth;
283 2357745 const int b_stride= b_width;
284 2357745 BlockNode *lt= &s->block[b_x + b_y*b_stride];
285 2357745 BlockNode *rt= lt+1;
286 2357745 BlockNode *lb= lt+b_stride;
287 2357745 BlockNode *rb= lb+1;
288 uint8_t *block[4];
289 // When src_stride is large enough, it is possible to interleave the blocks.
290 // Otherwise the blocks are written sequentially in the tmp buffer.
291
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 2357745 int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
292 2357745 uint8_t *tmp = s->scratchbuf;
293 uint8_t *ptmp;
294 int x,y;
295
296
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 2357745 if(b_x<0){
297 70551 lt= rt;
298 70551 lb= rb;
299
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 2287194 }else if(b_x + 1 >= b_width){
300 68187 rt= lt;
301 68187 rb= lb;
302 }
303
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 2357745 if(b_y<0){
304 106485 lt= lb;
305 106485 rt= rb;
306
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 2251260 }else if(b_y + 1 >= b_height){
307 98685 lb= lt;
308 98685 rb= rt;
309 }
310
311
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 2357745 if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
312 70551 obmc -= src_x;
313 70551 b_w += src_x;
314
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 70551 if(!sliced && !offset_dst)
315 13446 dst -= src_x;
316 70551 src_x=0;
317 }
318
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 2357745 if(src_x + b_w > w){
319 68187 b_w = w - src_x;
320 }
321
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 2357745 if(src_y<0){
322 106485 obmc -= src_y*obmc_stride;
323 106485 b_h += src_y;
324
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 106485 if(!sliced && !offset_dst)
325 29940 dst -= src_y*dst_stride;
326 106485 src_y=0;
327 }
328
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 2357745 if(src_y + b_h> h){
329 98685 b_h = h - src_y;
330 }
331
332
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 2357745 if(b_w<=0 || b_h<=0) return;
333
334
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 2357745 if(!sliced && offset_dst)
335 1421550 dst += src_x + src_y*dst_stride;
336 2357745 dst8+= src_x + src_y*src_stride;
337 // src += src_x + src_y*src_stride;
338
339 2357745 ptmp= tmp + 3*tmp_step;
340 2357745 block[0]= ptmp;
341 2357745 ptmp+=tmp_step;
342 2357745 ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
343
344
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 2357745 if(same_block(lt, rt)){
345 785313 block[1]= block[0];
346 }else{
347 1572432 block[1]= ptmp;
348 1572432 ptmp+=tmp_step;
349 1572432 ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
350 }
351
352
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 2357745 if(same_block(lt, lb)){
353 792018 block[2]= block[0];
354
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 1565727 }else if(same_block(rt, lb)){
355 198012 block[2]= block[1];
356 }else{
357 1367715 block[2]= ptmp;
358 1367715 ptmp+=tmp_step;
359 1367715 ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
360 }
361
362
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 2357745 if(same_block(lt, rb) ){
363 442506 block[3]= block[0];
364
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 1915239 }else if(same_block(rt, rb)){
365 472239 block[3]= block[1];
366
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 1443000 }else if(same_block(lb, rb)){
367 365625 block[3]= block[2];
368 }else{
369 1077375 block[3]= ptmp;
370 1077375 ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
371 }
372
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 2357745 if(sliced){
373 710775 s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
374 }else{
375
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 11394170 for(y=0; y<b_h; y++){
376 //FIXME ugly misuse of obmc_stride
377 9747200 const uint8_t *obmc1= obmc + y*obmc_stride;
378 9747200 const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
379 9747200 const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
380 9747200 const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
381
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 81568352 for(x=0; x<b_w; x++){
382 71821152 int v= obmc1[x] * block[3][x + y*src_stride]
383 71821152 +obmc2[x] * block[2][x + y*src_stride]
384 71821152 +obmc3[x] * block[1][x + y*src_stride]
385 71821152 +obmc4[x] * block[0][x + y*src_stride];
386
387 71821152 v <<= 8 - LOG2_OBMC_MAX;
388 if(FRAC_BITS != 8){
389 71821152 v >>= 8 - FRAC_BITS;
390 }
391
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 71821152 if(add){
392 23846400 v += dst[x + y*dst_stride];
393 23846400 v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
394
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 23846400 if(v&(~255)) v= ~(v>>31);
395 23846400 dst8[x + y*src_stride] = v;
396 }else{
397 47974752 dst[x + y*dst_stride] -= v;
398 }
399 }
400 }
401 }
402 }
403
404 42300 static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
405 42300 Plane *p= &s->plane[plane_index];
406 42300 const int mb_w= s->b_width << s->block_max_depth;
407 42300 const int mb_h= s->b_height << s->block_max_depth;
408 int x, y, mb_x;
409 42300 int block_size = MB_SIZE >> s->block_max_depth;
410
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 42300 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
411
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 42300 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
412
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 42300 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
413
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 42300 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
414 42300 int ref_stride= s->current_picture->linesize[plane_index];
415 42300 uint8_t *dst8= s->current_picture->data[plane_index];
416 42300 int w= p->width;
417 42300 int h= p->height;
418 av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares
419
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 42300 if(s->keyframe || (s->avctx->debug&512)){
420
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 4230 if(mb_y==mb_h)
421 270 return;
422
423
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 3960 if(add){
424
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 14460 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
425
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 2662080 for(x=0; x<w; x++){
426 2649600 int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
427 2649600 v >>= FRAC_BITS;
428
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 2649600 if(v&(~255)) v= ~(v>>31);
429 2649600 dst8[x + y*ref_stride]= v;
430 }
431 }
432 }else{
433
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 14460 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
434
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 2662080 for(x=0; x<w; x++){
435 2649600 buf[x + y*w]-= 128<<FRAC_BITS;
436 }
437 }
438 }
439
440 3960 return;
441 }
442
443
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 1459620 for(mb_x=0; mb_x<=mb_w; mb_x++){
444 1421550 add_yblock(s, 0, NULL, buf, dst8, obmc,
445 1421550 block_w*mb_x - block_w/2,
446 1421550 block_h*mb_y - block_h/2,
447 block_w, block_h,
448 w, h,
449 w, ref_stride, obmc_stride,
450 mb_x - 1, mb_y - 1,
451 add, 1, plane_index);
452 }
453 }
454
455 2700 static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
456 2700 const int mb_h= s->b_height << s->block_max_depth;
457 int mb_y;
458
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 45000 for(mb_y=0; mb_y<=mb_h; mb_y++)
459 42300 predict_slice(s, buf, plane_index, add, mb_y);
460 2700 }
461
462 452314 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){
463 452314 const int w= s->b_width << s->block_max_depth;
464 452314 const int rem_depth= s->block_max_depth - level;
465 452314 const int index= (x + y*w) << rem_depth;
466 452314 const int block_w= 1<<rem_depth;
467 452314 const int block_h= 1<<rem_depth; //FIXME "w!=h"
468 BlockNode block;
469 int i,j;
470
471 452314 block.color[0]= l;
472 452314 block.color[1]= cb;
473 452314 block.color[2]= cr;
474 452314 block.mx= mx;
475 452314 block.my= my;
476 452314 block.ref= ref;
477 452314 block.type= type;
478 452314 block.level= level;
479
480
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 934986 for(j=0; j<block_h; j++){
481
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 1026060 for(i=0; i<block_w; i++){
482 543388 s->block[index + i + j*w]= block;
483 }
484 }
485 452314 }
486
487 275940 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){
488 275940 SnowContext *s = c->avctx->priv_data;
489 275940 const int offset[3]= {
490 275940 y*c-> stride + x,
491 275940 ((y*c->uvstride + x)>>s->chroma_h_shift),
492 275940 ((y*c->uvstride + x)>>s->chroma_h_shift),
493 };
494 int i;
495
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 1103760 for(i=0; i<3; i++){
496 827820 c->src[0][i]= src [i];
497 827820 c->ref[0][i]= ref [i] + offset[i];
498 }
499 av_assert2(!ref_index);
500 275940 }
501
502
503 /* bitstream functions */
504
505 extern const int8_t ff_quant3bA[256];
506
507 #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0
508
509 1400980 static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
510 int i;
511
512
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 1400980 if(v){
513 1122246 const int a= FFABS(v);
514 1122246 const int e= av_log2(a);
515 1122246 const int el= FFMIN(e, 10);
516 1122246 put_rac(c, state+0, 0);
517
518
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 4580369 for(i=0; i<el; i++){
519 3458123 put_rac(c, state+1+i, 1); //1..10
520 }
521
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 1122246 for(; i<e; i++){
522 ✗ put_rac(c, state+1+9, 1); //1..10
523 }
524
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 1122246 put_rac(c, state+1+FFMIN(i,9), 0);
525
526
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 1122246 for(i=e-1; i>=el; i--){
527 ✗ put_rac(c, state+22+9, (a>>i)&1); //22..31
528 }
529
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 4580369 for(; i>=0; i--){
530 3458123 put_rac(c, state+22+i, (a>>i)&1); //22..31
531 }
532
533
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 1122246 if(is_signed)
534 1121841 put_rac(c, state+11 + el, v < 0); //11..21
535 }else{
536 278734 put_rac(c, state+0, 1);
537 }
538 1400980 }
539
540 398667 static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
541
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 398667 if(get_rac(c, state+0))
542 181336 return 0;
543 else{
544 int i, e;
545 unsigned a;
546 217331 e= 0;
547
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 396432 while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
548 179101 e++;
549
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 179101 if (e > 31)
550 ✗ return AVERROR_INVALIDDATA;
551 }
552
553 217331 a= 1;
554
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 396432 for(i=e-1; i>=0; i--){
555
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 179101 a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
556 }
557
558
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 217331 e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21
559 217331 return (a^e)-e;
560 }
561 }
562
563 16306397 static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){
564 int i;
565
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 16306397 int r= log2>=0 ? 1<<log2 : 1;
566
567 av_assert2(v>=0);
568 av_assert2(log2>=-4);
569
570
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 28198970 while(v >= r){
571 11892573 put_rac(c, state+4+log2, 1);
572 11892573 v -= r;
573 11892573 log2++;
574
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 11892573 if(log2>0) r+=r;
575 }
576 16306397 put_rac(c, state+4+log2, 0);
577
578
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 32945372 for(i=log2-1; i>=0; i--){
579 16638975 put_rac(c, state+31-i, (v>>i)&1);
580 }
581 16306397 }
582
583 16813073 static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){
584 int i;
585
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 16813073 int r= log2>=0 ? 1<<log2 : 1;
586 16813073 int v=0;
587
588 av_assert2(log2>=-4);
589
590
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 29171987 while(log2<28 && get_rac(c, state+4+log2)){
591 12358914 v+= r;
592 12358914 log2++;
593
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 12358914 if(log2>0) r+=r;
594 }
595
596
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 34324391 for(i=log2-1; i>=0; i--){
597 17511318 v+= get_rac(c, state+31-i)<<i;
598 }
599
600 16813073 return v;
601 }
602
603 22128 static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){
604 22128 const int w= b->width;
605 22128 const int h= b->height;
606 int x,y;
607
608 int run, runs;
609 22128 x_and_coeff *xc= b->x_coeff;
610 22128 x_and_coeff *prev_xc= NULL;
611 22128 x_and_coeff *prev2_xc= xc;
612
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 22128 x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL;
613 22128 x_and_coeff *prev_parent_xc= parent_xc;
614
615 22128 runs= get_symbol2(&s->c, b->state[30], 0);
616
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 22128 if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
617 4892 else run= INT_MAX;
618
619
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 398128 for(y=0; y<h; y++){
620 376000 int v=0;
621 376000 int lt=0, t=0, rt=0;
622
623
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 376000 if(y && prev_xc->x == 0){
624 214402 rt= prev_xc->coeff;
625 }
626
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 25581367 for(x=0; x<w; x++){
627 25205367 int p=0;
628 25205367 const int l= v;
629
630 25205367 lt= t; t= rt;
631
632
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 25205367 if(y){
633
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 24753695 if(prev_xc->x <= x)
634 16207850 prev_xc++;
635
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 24753695 if(prev_xc->x == x + 1)
636 15993448 rt= prev_xc->coeff;
637 else
638 8760247 rt=0;
639 }
640
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 25205367 if(parent_xc){
641
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 25101348 if(x>>1 > parent_xc->x){
642 8437610 parent_xc++;
643 }
644
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 25101348 if(x>>1 == parent_xc->x){
645 17312556 p= parent_xc->coeff;
646 }
647 }
648
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 25205367 if(/*ll|*/l|lt|t|rt|p){
649 24345882 int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
650
651 24345882 v=get_rac(&s->c, &b->state[0][context]);
652
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 24345882 if(v){
653 16203935 v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
654 16203935 v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]);
655
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 16203935 if ((uint16_t)v != v) {
656 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
657 ✗ v = 1;
658 }
659 16203935 xc->x=x;
660 16203935 (xc++)->coeff= v;
661 }
662 }else{
663
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 859485 if(!run){
664
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 293505 if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
665 17236 else run= INT_MAX;
666 293505 v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
667 293505 v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
668
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 293505 if ((uint16_t)v != v) {
669 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
670 ✗ v = 1;
671 }
672
673 293505 xc->x=x;
674 293505 (xc++)->coeff= v;
675 }else{
676 int max_run;
677 565980 run--;
678 565980 v=0;
679 av_assert2(run >= 0);
680
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 565980 if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
681
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 31562 else max_run= FFMIN(run, w-x-1);
682
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 565980 if(parent_xc)
683
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 562134 max_run= FFMIN(max_run, 2*parent_xc->x - x - 1);
684 av_assert2(max_run >= 0 && max_run <= run);
685
686 565980 x+= max_run;
687 565980 run-= max_run;
688 }
689 }
690 }
691 376000 (xc++)->x= w+1; //end marker
692 376000 prev_xc= prev2_xc;
693 376000 prev2_xc= xc;
694
695
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 376000 if(parent_xc){
696
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 360000 if(y&1){
697
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 289280 while(parent_xc->x != parent->width+1)
698 109742 parent_xc++;
699 179538 parent_xc++;
700 179538 prev_parent_xc= parent_xc;
701 }else{
702 180462 parent_xc= prev_parent_xc;
703 }
704 }
705 }
706
707 22128 (xc++)->x= w+1; //end marker
708 22128 }
709
710 #endif /* AVCODEC_SNOW_H */
711