FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/snow.h
Date: 2022-11-28 23:49:43
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 SNOW_MAX_PLANES 4
39
40 #define FF_ME_ITER 3
41
42 #define MID_STATE 128
43
44 #define MAX_PLANES 4
45 #define QSHIFT 5
46 #define QROOT (1<<QSHIFT)
47 #define LOSSLESS_QLOG -128
48 #define FRAC_BITS 4
49 #define MAX_REF_FRAMES 8
50
51 #define LOG2_OBMC_MAX 8
52 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
53 typedef struct BlockNode{
54 int16_t mx; ///< Motion vector component X, see mv_scale
55 int16_t my; ///< Motion vector component Y, see mv_scale
56 uint8_t ref; ///< Reference frame index
57 uint8_t color[3]; ///< Color for intra
58 uint8_t type; ///< Bitfield of BLOCK_*
59 //#define TYPE_SPLIT 1
60 #define BLOCK_INTRA 1 ///< Intra block, inter otherwise
61 #define BLOCK_OPT 2 ///< Block needs no checks in this round of iterative motion estiation
62 //#define TYPE_NOCOLOR 4
63 uint8_t level; //FIXME merge into type?
64 }BlockNode;
65
66 static const BlockNode null_block= { //FIXME add border maybe
67 .color= {128,128,128},
68 .mx= 0,
69 .my= 0,
70 .ref= 0,
71 .type= 0,
72 .level= 0,
73 };
74
75 #define LOG2_MB_SIZE 4
76 #define MB_SIZE (1<<LOG2_MB_SIZE)
77 #define ENCODER_EXTRA_BITS 4
78 #define HTAPS_MAX 8
79
80 typedef struct x_and_coeff{
81 int16_t x;
82 uint16_t coeff;
83 } x_and_coeff;
84
85 typedef struct SubBand{
86 int level;
87 int stride;
88 int width;
89 int height;
90 int qlog; ///< log(qscale)/log[2^(1/6)]
91 DWTELEM *buf;
92 IDWTELEM *ibuf;
93 int buf_x_offset;
94 int buf_y_offset;
95 int stride_line; ///< Stride measured in lines, not pixels.
96 x_and_coeff * x_coeff;
97 struct SubBand *parent;
98 uint8_t state[/*7*2*/ 7 + 512][32];
99 }SubBand;
100
101 typedef struct Plane{
102 int width;
103 int height;
104 SubBand band[MAX_DECOMPOSITIONS][4];
105
106 int htaps;
107 int8_t hcoeff[HTAPS_MAX/2];
108 int diag_mc;
109 int fast_mc;
110
111 int last_htaps;
112 int8_t last_hcoeff[HTAPS_MAX/2];
113 int last_diag_mc;
114 }Plane;
115
116 typedef struct SnowContext{
117 AVClass *class;
118 AVCodecContext *avctx;
119 RangeCoder c;
120 MECmpContext mecc;
121 HpelDSPContext hdsp;
122 QpelDSPContext qdsp;
123 VideoDSPContext vdsp;
124 H264QpelContext h264qpel;
125 MpegvideoEncDSPContext mpvencdsp;
126 SnowDWTContext dwt;
127 AVFrame *input_picture; ///< new_picture with the internal linesizes
128 AVFrame *current_picture;
129 AVFrame *last_picture[MAX_REF_FRAMES];
130 AVFrame *mconly_picture;
131 // uint8_t q_context[16];
132 uint8_t header_state[32];
133 uint8_t block_state[128 + 32*128];
134 int keyframe;
135 int always_reset;
136 int version;
137 int spatial_decomposition_type;
138 int last_spatial_decomposition_type;
139 int temporal_decomposition_type;
140 int spatial_decomposition_count;
141 int last_spatial_decomposition_count;
142 int temporal_decomposition_count;
143 int max_ref_frames;
144 int ref_frames;
145 int16_t (*ref_mvs[MAX_REF_FRAMES])[2];
146 uint32_t *ref_scores[MAX_REF_FRAMES];
147 DWTELEM *spatial_dwt_buffer;
148 DWTELEM *temp_dwt_buffer;
149 IDWTELEM *spatial_idwt_buffer;
150 IDWTELEM *temp_idwt_buffer;
151 int *run_buffer;
152 int colorspace_type;
153 int chroma_h_shift;
154 int chroma_v_shift;
155 int spatial_scalability;
156 int qlog;
157 int last_qlog;
158 int lambda;
159 int lambda2;
160 int pass1_rc;
161 int mv_scale;
162 int last_mv_scale;
163 int qbias;
164 int last_qbias;
165 #define QBIAS_SHIFT 3
166 int b_width;
167 int b_height;
168 int block_max_depth;
169 int last_block_max_depth;
170 int nb_planes;
171 Plane plane[MAX_PLANES];
172 BlockNode *block;
173 #define ME_CACHE_SIZE 1024
174 unsigned me_cache[ME_CACHE_SIZE];
175 unsigned me_cache_generation;
176 slice_buffer sb;
177 int memc_only;
178 int no_bitstream;
179 int intra_penalty;
180 int motion_est;
181 int iterative_dia_size;
182 int scenechange_threshold;
183
184 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)
185
186 uint8_t *scratchbuf;
187 uint8_t *emu_edge_buffer;
188
189 AVMotionVector *avmv;
190 unsigned avmv_size;
191 int avmv_index;
192 uint64_t encoding_error[SNOW_MAX_PLANES];
193
194 int pred;
195 }SnowContext;
196
197 /* Tables */
198 extern const uint8_t * const ff_obmc_tab[4];
199 extern const uint8_t ff_qexp[QROOT];
200 extern int ff_scale_mv_ref[MAX_REF_FRAMES][MAX_REF_FRAMES];
201
202 /* C bits used by mmx/sse2/altivec */
203
204 248 static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
205 248 (*i) = (width) - 2;
206
207
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248 if (width & 1){
208 low[(*i)+1] = low[((*i)+1)>>1];
209 (*i)--;
210 }
211 248 }
212
213 static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){
214 for (; (*i)>=0; (*i)-=2){
215 low[(*i)+1] = high[(*i)>>1];
216 low[*i] = low[(*i)>>1];
217 }
218 }
219
220 744 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){
221
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5736 for(; i<w; i++){
222 4992 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
223 }
224
225
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744 if((width^lift_high)&1){
226 496 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
227 }
228 744 }
229
230 248 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
231
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1912 for(; i<w; i++){
232 1664 dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
233 }
234
235
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248 if(width&1){
236 dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
237 }
238 248 }
239
240 /* common code */
241
242 int ff_snow_common_init(AVCodecContext *avctx);
243 int ff_snow_common_init_after_header(AVCodecContext *avctx);
244 void ff_snow_common_end(SnowContext *s);
245 void ff_snow_release_buffer(AVCodecContext *avctx);
246 void ff_snow_reset_contexts(SnowContext *s);
247 int ff_snow_alloc_blocks(SnowContext *s);
248 int ff_snow_frame_start(SnowContext *s);
249 void ff_snow_pred_block(SnowContext *s, uint8_t *dst, uint8_t *tmp, ptrdiff_t stride,
250 int sx, int sy, int b_w, int b_h, const BlockNode *block,
251 int plane_index, int w, int h);
252 int ff_snow_get_buffer(SnowContext *s, AVFrame *frame);
253 /* common inline functions */
254 //XXX doublecheck all of them should stay inlined
255
256 1565346 static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
257 const BlockNode *left, const BlockNode *top, const BlockNode *tr){
258
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1565346 if(s->ref_frames == 1){
259 1565346 *mx = mid_pred(left->mx, top->mx, tr->mx);
260 1565346 *my = mid_pred(left->my, top->my, tr->my);
261 }else{
262 const int *scale = ff_scale_mv_ref[ref];
263 *mx = mid_pred((left->mx * scale[left->ref] + 128) >>8,
264 (top ->mx * scale[top ->ref] + 128) >>8,
265 (tr ->mx * scale[tr ->ref] + 128) >>8);
266 *my = mid_pred((left->my * scale[left->ref] + 128) >>8,
267 (top ->my * scale[top ->ref] + 128) >>8,
268 (tr ->my * scale[tr ->ref] + 128) >>8);
269 }
270 1565346 }
271
272 12015986 static av_always_inline int same_block(BlockNode *a, BlockNode *b){
273
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12015986 if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
274 86127 return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
275 }else{
276 11929859 return !((a->mx - b->mx) | (a->my - b->my) | (a->ref - b->ref) | ((a->type ^ b->type)&BLOCK_INTRA));
277 }
278 }
279
280 //FIXME name cleanup (b_w, block_w, b_width stuff)
281 //XXX should we really inline it?
282 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){
283 2357745 const int b_width = s->b_width << s->block_max_depth;
284 2357745 const int b_height= s->b_height << s->block_max_depth;
285 2357745 const int b_stride= b_width;
286 2357745 BlockNode *lt= &s->block[b_x + b_y*b_stride];
287 2357745 BlockNode *rt= lt+1;
288 2357745 BlockNode *lb= lt+b_stride;
289 2357745 BlockNode *rb= lb+1;
290 uint8_t *block[4];
291 // When src_stride is large enough, it is possible to interleave the blocks.
292 // Otherwise the blocks are written sequentially in the tmp buffer.
293
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2357745 int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
294 2357745 uint8_t *tmp = s->scratchbuf;
295 uint8_t *ptmp;
296 int x,y;
297
298
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2357745 if(b_x<0){
299 70551 lt= rt;
300 70551 lb= rb;
301
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2287194 }else if(b_x + 1 >= b_width){
302 68187 rt= lt;
303 68187 rb= lb;
304 }
305
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2357745 if(b_y<0){
306 106485 lt= lb;
307 106485 rt= rb;
308
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2251260 }else if(b_y + 1 >= b_height){
309 98685 lb= lt;
310 98685 rb= rt;
311 }
312
313
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2357745 if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
314 70551 obmc -= src_x;
315 70551 b_w += src_x;
316
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70551 if(!sliced && !offset_dst)
317 13446 dst -= src_x;
318 70551 src_x=0;
319 }
320
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2357745 if(src_x + b_w > w){
321 68187 b_w = w - src_x;
322 }
323
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2357745 if(src_y<0){
324 106485 obmc -= src_y*obmc_stride;
325 106485 b_h += src_y;
326
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106485 if(!sliced && !offset_dst)
327 29940 dst -= src_y*dst_stride;
328 106485 src_y=0;
329 }
330
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2357745 if(src_y + b_h> h){
331 98685 b_h = h - src_y;
332 }
333
334
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2357745 if(b_w<=0 || b_h<=0) return;
335
336
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2357745 if(!sliced && offset_dst)
337 1421550 dst += src_x + src_y*dst_stride;
338 2357745 dst8+= src_x + src_y*src_stride;
339 // src += src_x + src_y*src_stride;
340
341 2357745 ptmp= tmp + 3*tmp_step;
342 2357745 block[0]= ptmp;
343 2357745 ptmp+=tmp_step;
344 2357745 ff_snow_pred_block(s, block[0], tmp, src_stride, src_x, src_y, b_w, b_h, lt, plane_index, w, h);
345
346
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2357745 if(same_block(lt, rt)){
347 785313 block[1]= block[0];
348 }else{
349 1572432 block[1]= ptmp;
350 1572432 ptmp+=tmp_step;
351 1572432 ff_snow_pred_block(s, block[1], tmp, src_stride, src_x, src_y, b_w, b_h, rt, plane_index, w, h);
352 }
353
354
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2357745 if(same_block(lt, lb)){
355 792018 block[2]= block[0];
356
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1565727 }else if(same_block(rt, lb)){
357 198012 block[2]= block[1];
358 }else{
359 1367715 block[2]= ptmp;
360 1367715 ptmp+=tmp_step;
361 1367715 ff_snow_pred_block(s, block[2], tmp, src_stride, src_x, src_y, b_w, b_h, lb, plane_index, w, h);
362 }
363
364
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2357745 if(same_block(lt, rb) ){
365 442506 block[3]= block[0];
366
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1915239 }else if(same_block(rt, rb)){
367 472239 block[3]= block[1];
368
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1443000 }else if(same_block(lb, rb)){
369 365625 block[3]= block[2];
370 }else{
371 1077375 block[3]= ptmp;
372 1077375 ff_snow_pred_block(s, block[3], tmp, src_stride, src_x, src_y, b_w, b_h, rb, plane_index, w, h);
373 }
374
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2357745 if(sliced){
375 710775 s->dwt.inner_add_yblock(obmc, obmc_stride, block, b_w, b_h, src_x,src_y, src_stride, sb, add, dst8);
376 }else{
377
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11394170 for(y=0; y<b_h; y++){
378 //FIXME ugly misuse of obmc_stride
379 9747200 const uint8_t *obmc1= obmc + y*obmc_stride;
380 9747200 const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
381 9747200 const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
382 9747200 const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
383
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81568352 for(x=0; x<b_w; x++){
384 71821152 int v= obmc1[x] * block[3][x + y*src_stride]
385 71821152 +obmc2[x] * block[2][x + y*src_stride]
386 71821152 +obmc3[x] * block[1][x + y*src_stride]
387 71821152 +obmc4[x] * block[0][x + y*src_stride];
388
389 71821152 v <<= 8 - LOG2_OBMC_MAX;
390 if(FRAC_BITS != 8){
391 71821152 v >>= 8 - FRAC_BITS;
392 }
393
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71821152 if(add){
394 23846400 v += dst[x + y*dst_stride];
395 23846400 v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
396
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23846400 if(v&(~255)) v= ~(v>>31);
397 23846400 dst8[x + y*src_stride] = v;
398 }else{
399 47974752 dst[x + y*dst_stride] -= v;
400 }
401 }
402 }
403 }
404 }
405
406 42300 static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
407 42300 Plane *p= &s->plane[plane_index];
408 42300 const int mb_w= s->b_width << s->block_max_depth;
409 42300 const int mb_h= s->b_height << s->block_max_depth;
410 int x, y, mb_x;
411 42300 int block_size = MB_SIZE >> s->block_max_depth;
412
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42300 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
413
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42300 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
414
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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];
415
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42300 const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
416 42300 int ref_stride= s->current_picture->linesize[plane_index];
417 42300 uint8_t *dst8= s->current_picture->data[plane_index];
418 42300 int w= p->width;
419 42300 int h= p->height;
420 av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares
421
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42300 if(s->keyframe || (s->avctx->debug&512)){
422
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4230 if(mb_y==mb_h)
423 270 return;
424
425
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3960 if(add){
426
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14460 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
427
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2662080 for(x=0; x<w; x++){
428 2649600 int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
429 2649600 v >>= FRAC_BITS;
430
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2649600 if(v&(~255)) v= ~(v>>31);
431 2649600 dst8[x + y*ref_stride]= v;
432 }
433 }
434 }else{
435
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14460 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
436
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2662080 for(x=0; x<w; x++){
437 2649600 buf[x + y*w]-= 128<<FRAC_BITS;
438 }
439 }
440 }
441
442 3960 return;
443 }
444
445
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1459620 for(mb_x=0; mb_x<=mb_w; mb_x++){
446 1421550 add_yblock(s, 0, NULL, buf, dst8, obmc,
447 1421550 block_w*mb_x - block_w/2,
448 1421550 block_h*mb_y - block_h/2,
449 block_w, block_h,
450 w, h,
451 w, ref_stride, obmc_stride,
452 mb_x - 1, mb_y - 1,
453 add, 1, plane_index);
454 }
455 }
456
457 2700 static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
458 2700 const int mb_h= s->b_height << s->block_max_depth;
459 int mb_y;
460
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45000 for(mb_y=0; mb_y<=mb_h; mb_y++)
461 42300 predict_slice(s, buf, plane_index, add, mb_y);
462 2700 }
463
464 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){
465 452314 const int w= s->b_width << s->block_max_depth;
466 452314 const int rem_depth= s->block_max_depth - level;
467 452314 const int index= (x + y*w) << rem_depth;
468 452314 const int block_w= 1<<rem_depth;
469 452314 const int block_h= 1<<rem_depth; //FIXME "w!=h"
470 BlockNode block;
471 int i,j;
472
473 452314 block.color[0]= l;
474 452314 block.color[1]= cb;
475 452314 block.color[2]= cr;
476 452314 block.mx= mx;
477 452314 block.my= my;
478 452314 block.ref= ref;
479 452314 block.type= type;
480 452314 block.level= level;
481
482
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934986 for(j=0; j<block_h; j++){
483
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1026060 for(i=0; i<block_w; i++){
484 543388 s->block[index + i + j*w]= block;
485 }
486 }
487 452314 }
488
489 275940 static inline void init_ref(MotionEstContext *c, const uint8_t *const src[3], uint8_t *const ref[3], uint8_t *const ref2[3], int x, int y, int ref_index){
490 275940 SnowContext *s = c->avctx->priv_data;
491 275940 const int offset[3]= {
492 275940 y*c-> stride + x,
493 275940 ((y*c->uvstride + x)>>s->chroma_h_shift),
494 275940 ((y*c->uvstride + x)>>s->chroma_h_shift),
495 };
496 int i;
497
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1103760 for(i=0; i<3; i++){
498 827820 c->src[0][i]= src [i];
499 827820 c->ref[0][i]= ref [i] + offset[i];
500 }
501 av_assert2(!ref_index);
502 275940 }
503
504
505 /* bitstream functions */
506
507 extern const int8_t ff_quant3bA[256];
508
509 #define QEXPSHIFT (7-FRAC_BITS+8) //FIXME try to change this to 0
510
511 1400980 static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
512 int i;
513
514
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1400980 if(v){
515 1122246 const int a= FFABS(v);
516 1122246 const int e= av_log2(a);
517 1122246 const int el= FFMIN(e, 10);
518 1122246 put_rac(c, state+0, 0);
519
520
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4580369 for(i=0; i<el; i++){
521 3458123 put_rac(c, state+1+i, 1); //1..10
522 }
523
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1122246 for(; i<e; i++){
524 put_rac(c, state+1+9, 1); //1..10
525 }
526
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1122246 put_rac(c, state+1+FFMIN(i,9), 0);
527
528
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1122246 for(i=e-1; i>=el; i--){
529 put_rac(c, state+22+9, (a>>i)&1); //22..31
530 }
531
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4580369 for(; i>=0; i--){
532 3458123 put_rac(c, state+22+i, (a>>i)&1); //22..31
533 }
534
535
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1122246 if(is_signed)
536 1121841 put_rac(c, state+11 + el, v < 0); //11..21
537 }else{
538 278734 put_rac(c, state+0, 1);
539 }
540 1400980 }
541
542 398667 static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
543
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398667 if(get_rac(c, state+0))
544 181336 return 0;
545 else{
546 int i, e;
547 unsigned a;
548 217331 e= 0;
549
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396432 while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
550 179101 e++;
551
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179101 if (e > 31)
552 return AVERROR_INVALIDDATA;
553 }
554
555 217331 a= 1;
556
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396432 for(i=e-1; i>=0; i--){
557
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179101 a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
558 }
559
560
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217331 e= -(is_signed && get_rac(c, state+11 + FFMIN(e,10))); //11..21
561 217331 return (a^e)-e;
562 }
563 }
564
565 16306397 static inline void put_symbol2(RangeCoder *c, uint8_t *state, int v, int log2){
566 int i;
567
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16306397 int r= log2>=0 ? 1<<log2 : 1;
568
569 av_assert2(v>=0);
570 av_assert2(log2>=-4);
571
572
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28198970 while(v >= r){
573 11892573 put_rac(c, state+4+log2, 1);
574 11892573 v -= r;
575 11892573 log2++;
576
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11892573 if(log2>0) r+=r;
577 }
578 16306397 put_rac(c, state+4+log2, 0);
579
580
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32945372 for(i=log2-1; i>=0; i--){
581 16638975 put_rac(c, state+31-i, (v>>i)&1);
582 }
583 16306397 }
584
585 16813073 static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2){
586 int i;
587
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16813073 int r= log2>=0 ? 1<<log2 : 1;
588 16813073 int v=0;
589
590 av_assert2(log2>=-4);
591
592
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29171987 while(log2<28 && get_rac(c, state+4+log2)){
593 12358914 v+= r;
594 12358914 log2++;
595
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12358914 if(log2>0) r+=r;
596 }
597
598
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34324391 for(i=log2-1; i>=0; i--){
599 17511318 v+= get_rac(c, state+31-i)<<i;
600 }
601
602 16813073 return v;
603 }
604
605 22128 static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation){
606 22128 const int w= b->width;
607 22128 const int h= b->height;
608 int x,y;
609
610 int run, runs;
611 22128 x_and_coeff *xc= b->x_coeff;
612 22128 x_and_coeff *prev_xc= NULL;
613 22128 x_and_coeff *prev2_xc= xc;
614
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22128 x_and_coeff *parent_xc= parent ? parent->x_coeff : NULL;
615 22128 x_and_coeff *prev_parent_xc= parent_xc;
616
617 22128 runs= get_symbol2(&s->c, b->state[30], 0);
618
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22128 if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
619 4892 else run= INT_MAX;
620
621
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398128 for(y=0; y<h; y++){
622 376000 int v=0;
623 376000 int lt=0, t=0, rt=0;
624
625
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376000 if(y && prev_xc->x == 0){
626 214402 rt= prev_xc->coeff;
627 }
628
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25581367 for(x=0; x<w; x++){
629 25205367 int p=0;
630 25205367 const int l= v;
631
632 25205367 lt= t; t= rt;
633
634
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25205367 if(y){
635
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24753695 if(prev_xc->x <= x)
636 16207850 prev_xc++;
637
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24753695 if(prev_xc->x == x + 1)
638 15993448 rt= prev_xc->coeff;
639 else
640 8760247 rt=0;
641 }
642
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25205367 if(parent_xc){
643
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25101348 if(x>>1 > parent_xc->x){
644 8437610 parent_xc++;
645 }
646
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25101348 if(x>>1 == parent_xc->x){
647 17312556 p= parent_xc->coeff;
648 }
649 }
650
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25205367 if(/*ll|*/l|lt|t|rt|p){
651 24345882 int context= av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
652
653 24345882 v=get_rac(&s->c, &b->state[0][context]);
654
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24345882 if(v){
655 16203935 v= 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
656 16203935 v+=get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3*ff_quant3bA[t&0xFF]]);
657
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16203935 if ((uint16_t)v != v) {
658 av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
659 v = 1;
660 }
661 16203935 xc->x=x;
662 16203935 (xc++)->coeff= v;
663 }
664 }else{
665
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859485 if(!run){
666
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293505 if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
667 17236 else run= INT_MAX;
668 293505 v= 2*(get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
669 293505 v+=get_rac(&s->c, &b->state[0][16 + 1 + 3]);
670
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293505 if ((uint16_t)v != v) {
671 av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
672 v = 1;
673 }
674
675 293505 xc->x=x;
676 293505 (xc++)->coeff= v;
677 }else{
678 int max_run;
679 565980 run--;
680 565980 v=0;
681 av_assert2(run >= 0);
682
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565980 if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
683
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31562 else max_run= FFMIN(run, w-x-1);
684
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565980 if(parent_xc)
685
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562134 max_run= FFMIN(max_run, 2*parent_xc->x - x - 1);
686 av_assert2(max_run >= 0 && max_run <= run);
687
688 565980 x+= max_run;
689 565980 run-= max_run;
690 }
691 }
692 }
693 376000 (xc++)->x= w+1; //end marker
694 376000 prev_xc= prev2_xc;
695 376000 prev2_xc= xc;
696
697
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376000 if(parent_xc){
698
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360000 if(y&1){
699
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289280 while(parent_xc->x != parent->width+1)
700 109742 parent_xc++;
701 179538 parent_xc++;
702 179538 prev_parent_xc= parent_xc;
703 }else{
704 180462 parent_xc= prev_parent_xc;
705 }
706 }
707 }
708
709 22128 (xc++)->x= w+1; //end marker
710 22128 }
711
712 #endif /* AVCODEC_SNOW_H */
713