GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/snow.h Lines: 292 309 94.5 %
Date: 2020-09-25 23:16:12 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 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
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
5736
    for(; i<w; i++){
220
4992
        dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
221
    }
222
223
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
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
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
1929303
static inline void pred_mv(SnowContext *s, int *mx, int *my, int ref,
255
                           const BlockNode *left, const BlockNode *top, const BlockNode *tr){
256
1929303
    if(s->ref_frames == 1){
257
1929303
        *mx = mid_pred(left->mx, top->mx, tr->mx);
258
1929303
        *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
1929303
}
269
270
16154477
static av_always_inline int same_block(BlockNode *a, BlockNode *b){
271

16154477
    if((a->type&BLOCK_INTRA) && (b->type&BLOCK_INTRA)){
272
1029639
        return !((a->color[0] - b->color[0]) | (a->color[1] - b->color[1]) | (a->color[2] - b->color[2]));
273
    }else{
274
15124838
        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
3083760
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
3083760
    const int b_width = s->b_width  << s->block_max_depth;
282
3083760
    const int b_height= s->b_height << s->block_max_depth;
283
3083760
    const int b_stride= b_width;
284
3083760
    BlockNode *lt= &s->block[b_x + b_y*b_stride];
285
3083760
    BlockNode *rt= lt+1;
286
3083760
    BlockNode *lb= lt+b_stride;
287
3083760
    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
3083760
    int tmp_step= src_stride >= 7*MB_SIZE ? MB_SIZE : MB_SIZE*src_stride;
292
3083760
    uint8_t *tmp = s->scratchbuf;
293
    uint8_t *ptmp;
294
    int x,y;
295
296
3083760
    if(b_x<0){
297
80121
        lt= rt;
298
80121
        lb= rb;
299
3003639
    }else if(b_x + 1 >= b_width){
300
77757
        rt= lt;
301
77757
        rb= lb;
302
    }
303
3083760
    if(b_y<0){
304
118404
        lt= lb;
305
118404
        rt= rb;
306
2965356
    }else if(b_y + 1 >= b_height){
307
110604
        lb= lt;
308
110604
        rb= rt;
309
    }
310
311
3083760
    if(src_x<0){ //FIXME merge with prev & always round internal width up to *16
312
80121
        obmc -= src_x;
313
80121
        b_w += src_x;
314

80121
        if(!sliced && !offset_dst)
315
13446
            dst -= src_x;
316
80121
        src_x=0;
317
    }
318
3083760
    if(src_x + b_w > w){
319
77757
        b_w = w - src_x;
320
    }
321
3083760
    if(src_y<0){
322
118404
        obmc -= src_y*obmc_stride;
323
118404
        b_h += src_y;
324

118404
        if(!sliced && !offset_dst)
325
29940
            dst -= src_y*dst_stride;
326
118404
        src_y=0;
327
    }
328
3083760
    if(src_y + b_h> h){
329
110604
        b_h = h - src_y;
330
    }
331
332

3083760
    if(b_w<=0 || b_h<=0) return;
333
334

3083760
    if(!sliced && offset_dst)
335
2147565
        dst += src_x + src_y*dst_stride;
336
3083760
    dst8+= src_x + src_y*src_stride;
337
//    src += src_x + src_y*src_stride;
338
339
3083760
    ptmp= tmp + 3*tmp_step;
340
3083760
    block[0]= ptmp;
341
3083760
    ptmp+=tmp_step;
342
3083760
    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
3083760
    if(same_block(lt, rt)){
345
846306
        block[1]= block[0];
346
    }else{
347
2237454
        block[1]= ptmp;
348
2237454
        ptmp+=tmp_step;
349
2237454
        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
3083760
    if(same_block(lt, lb)){
353
874395
        block[2]= block[0];
354
2209365
    }else if(same_block(rt, lb)){
355
208647
        block[2]= block[1];
356
    }else{
357
2000718
        block[2]= ptmp;
358
2000718
        ptmp+=tmp_step;
359
2000718
        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
3083760
    if(same_block(lt, rb) ){
363
481845
        block[3]= block[0];
364
2601915
    }else if(same_block(rt, rb)){
365
528783
        block[3]= block[1];
366
2073132
    }else if(same_block(lb, rb)){
367
396921
        block[3]= block[2];
368
    }else{
369
1676211
        block[3]= ptmp;
370
1676211
        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
3083760
    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
16697081
        for(y=0; y<b_h; y++){
376
            //FIXME ugly misuse of obmc_stride
377
14324096
            const uint8_t *obmc1= obmc + y*obmc_stride;
378
14324096
            const uint8_t *obmc2= obmc1+ (obmc_stride>>1);
379
14324096
            const uint8_t *obmc3= obmc1+ obmc_stride*(obmc_stride>>1);
380
14324096
            const uint8_t *obmc4= obmc3+ (obmc_stride>>1);
381
122225888
            for(x=0; x<b_w; x++){
382
107901792
                int v=   obmc1[x] * block[3][x + y*src_stride]
383
107901792
                        +obmc2[x] * block[2][x + y*src_stride]
384
107901792
                        +obmc3[x] * block[1][x + y*src_stride]
385
107901792
                        +obmc4[x] * block[0][x + y*src_stride];
386
387
107901792
                v <<= 8 - LOG2_OBMC_MAX;
388
                if(FRAC_BITS != 8){
389
107901792
                    v >>= 8 - FRAC_BITS;
390
                }
391
107901792
                if(add){
392
59927040
                    v += dst[x + y*dst_stride];
393
59927040
                    v = (v + (1<<(FRAC_BITS-1))) >> FRAC_BITS;
394
59927040
                    if(v&(~255)) v= ~(v>>31);
395
59927040
                    dst8[x + y*src_stride] = v;
396
                }else{
397
47974752
                    dst[x + y*dst_stride] -= v;
398
                }
399
            }
400
        }
401
    }
402
}
403
404
51870
static av_always_inline void predict_slice(SnowContext *s, IDWTELEM *buf, int plane_index, int add, int mb_y){
405
51870
    Plane *p= &s->plane[plane_index];
406
51870
    const int mb_w= s->b_width  << s->block_max_depth;
407
51870
    const int mb_h= s->b_height << s->block_max_depth;
408
    int x, y, mb_x;
409
51870
    int block_size = MB_SIZE >> s->block_max_depth;
410
51870
    int block_w    = plane_index ? block_size>>s->chroma_h_shift : block_size;
411
51870
    int block_h    = plane_index ? block_size>>s->chroma_v_shift : block_size;
412
51870
    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
51870
    const int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
414
51870
    int ref_stride= s->current_picture->linesize[plane_index];
415
51870
    uint8_t *dst8= s->current_picture->data[plane_index];
416
51870
    int w= p->width;
417
51870
    int h= p->height;
418
    av_assert2(s->chroma_h_shift == s->chroma_v_shift); // obmc params assume squares
419

51870
    if(s->keyframe || (s->avctx->debug&512)){
420
4230
        if(mb_y==mb_h)
421
270
            return;
422
423
3960
        if(add){
424
14460
            for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
425
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
2649600
                    if(v&(~255)) v= ~(v>>31);
429
2649600
                    dst8[x + y*ref_stride]= v;
430
                }
431
            }
432
        }else{
433
14460
            for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
434
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
2195205
    for(mb_x=0; mb_x<=mb_w; mb_x++){
444
2147565
        add_yblock(s, 0, NULL, buf, dst8, obmc,
445
2147565
                   block_w*mb_x - block_w/2,
446
2147565
                   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
2874
static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add){
456
2874
    const int mb_h= s->b_height << s->block_max_depth;
457
    int mb_y;
458
54744
    for(mb_y=0; mb_y<=mb_h; mb_y++)
459
51870
        predict_slice(s, buf, plane_index, add, mb_y);
460
2874
}
461
462
693867
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
693867
    const int w= s->b_width << s->block_max_depth;
464
693867
    const int rem_depth= s->block_max_depth - level;
465
693867
    const int index= (x + y*w) << rem_depth;
466
693867
    const int block_w= 1<<rem_depth;
467
693867
    const int block_h= 1<<rem_depth; //FIXME "w!=h"
468
    BlockNode block;
469
    int i,j;
470
471
693867
    block.color[0]= l;
472
693867
    block.color[1]= cb;
473
693867
    block.color[2]= cr;
474
693867
    block.mx= mx;
475
693867
    block.my= my;
476
693867
    block.ref= ref;
477
693867
    block.type= type;
478
693867
    block.level= level;
479
480
1423125
    for(j=0; j<block_h; j++){
481
1529298
        for(i=0; i<block_w; i++){
482
800040
            s->block[index + i + j*w]= block;
483
        }
484
    }
485
693867
}
486
487
557820
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
557820
    SnowContext *s = c->avctx->priv_data;
489
557820
    const int offset[3]= {
490
557820
          y*c->  stride + x,
491
557820
        ((y*c->uvstride + x)>>s->chroma_h_shift),
492
557820
        ((y*c->uvstride + x)>>s->chroma_h_shift),
493
    };
494
    int i;
495
2231280
    for(i=0; i<3; i++){
496
1673460
        c->src[0][i]= src [i];
497
1673460
        c->ref[0][i]= ref [i] + offset[i];
498
    }
499
    av_assert2(!ref_index);
500
557820
}
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
2810756
static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
510
    int i;
511
512
2810756
    if(v){
513
2212871
        const int a= FFABS(v);
514
2212871
        const int e= av_log2(a);
515
2212871
        const int el= FFMIN(e, 10);
516
2212871
        put_rac(c, state+0, 0);
517
518
7535665
        for(i=0; i<el; i++){
519
5322794
            put_rac(c, state+1+i, 1);  //1..10
520
        }
521
2212871
        for(; i<e; i++){
522
            put_rac(c, state+1+9, 1);  //1..10
523
        }
524
2212871
        put_rac(c, state+1+FFMIN(i,9), 0);
525
526
2212871
        for(i=e-1; i>=el; i--){
527
            put_rac(c, state+22+9, (a>>i)&1); //22..31
528
        }
529
7535665
        for(; i>=0; i--){
530
5322794
            put_rac(c, state+22+i, (a>>i)&1); //22..31
531
        }
532
533
2212871
        if(is_signed)
534
2212448
            put_rac(c, state+11 + el, v < 0); //11..21
535
    }else{
536
597885
        put_rac(c, state+0, 1);
537
    }
538
2810756
}
539
540
398667
static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){
541
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

396432
        while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10
548
179101
            e++;
549
179101
            if (e > 31)
550
                return AVERROR_INVALIDDATA;
551
        }
552
553
217331
        a= 1;
554
396432
        for(i=e-1; i>=0; i--){
555
179101
            a += a + get_rac(c, state+22 + FFMIN(i,9)); //22..31
556
        }
557
558

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
16306397
    int r= log2>=0 ? 1<<log2 : 1;
566
567
    av_assert2(v>=0);
568
    av_assert2(log2>=-4);
569
570
28198970
    while(v >= r){
571
11892573
        put_rac(c, state+4+log2, 1);
572
11892573
        v -= r;
573
11892573
        log2++;
574
11892573
        if(log2>0) r+=r;
575
    }
576
16306397
    put_rac(c, state+4+log2, 0);
577
578
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
16813073
    int r= log2>=0 ? 1<<log2 : 1;
586
16813073
    int v=0;
587
588
    av_assert2(log2>=-4);
589
590

29171987
    while(log2<28 && get_rac(c, state+4+log2)){
591
12358914
        v+= r;
592
12358914
        log2++;
593
12358914
        if(log2>0) r+=r;
594
    }
595
596
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
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
22128
    if(runs-- > 0) run= get_symbol2(&s->c, b->state[1], 3);
617
4892
    else           run= INT_MAX;
618
619
398128
    for(y=0; y<h; y++){
620
376000
        int v=0;
621
376000
        int lt=0, t=0, rt=0;
622
623

376000
        if(y && prev_xc->x == 0){
624
214402
            rt= prev_xc->coeff;
625
        }
626
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
25205367
            if(y){
633
24753695
                if(prev_xc->x <= x)
634
16207850
                    prev_xc++;
635
24753695
                if(prev_xc->x == x + 1)
636
15993448
                    rt= prev_xc->coeff;
637
                else
638
8760247
                    rt=0;
639
            }
640
25205367
            if(parent_xc){
641
25101348
                if(x>>1 > parent_xc->x){
642
8437610
                    parent_xc++;
643
                }
644
25101348
                if(x>>1 == parent_xc->x){
645
17312556
                    p= parent_xc->coeff;
646
                }
647
            }
648
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
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
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
859485
                if(!run){
664
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
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

565980
                    if(y) max_run= FFMIN(run, prev_xc->x - x - 2);
681
31562
                    else  max_run= FFMIN(run, w-x-1);
682
565980
                    if(parent_xc)
683
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
376000
        if(parent_xc){
696
360000
            if(y&1){
697
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 */