FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/snowdec.c
Date: 2026-10-15 08:01:34
Exec Total Coverage
Lines: 401 501 80.0%
Functions: 13 13 100.0%
Branches: 289 402 71.9%
Line Branch Exec Source
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/emms.h"
22 #include "libavutil/intmath.h"
23 #include "libavutil/log.h"
24 #include "libavutil/mem.h"
25 #include "avcodec.h"
26 #include "codec_internal.h"
27 #include "decode.h"
28 #include "snow_dwt.h"
29 #include "snow.h"
30
31 #include "rangecoder.h"
32 #include "mathops.h"
33
34 404942 static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
35 {
36
2/2
✓ Branch 1 taken 184660 times.
✓ Branch 2 taken 220282 times.
 404942 if (get_rac(c, state + 0))
37 184660 return 0;
38 else {
39 int e;
40 unsigned a;
41 220282 e = 0;
42
3/4
✓ Branch 0 taken 401361 times.
✗ Branch 1 not taken.
✓ Branch 3 taken 181079 times.
✓ Branch 4 taken 220282 times.
 401361 while (get_rac(c, state + 1 + FFMIN(e, 9))) { //1..10
43 181079 e++;
44
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 181079 times.
 181079 if (e > 31)
45 ✗ return AVERROR_INVALIDDATA;
46 }
47
48 220282 a = 1;
49
2/2
✓ Branch 0 taken 181079 times.
✓ Branch 1 taken 220282 times.
 401361 for (int i = e - 1; i >= 0; i--)
50
1/2
✓ Branch 0 taken 181079 times.
✗ Branch 1 not taken.
 181079 a += a + get_rac(c, state + 22 + FFMIN(i, 9)); //22..31
51
52
5/6
✓ Branch 0 taken 219808 times.
✓ Branch 1 taken 474 times.
✓ Branch 2 taken 219808 times.
✗ Branch 3 not taken.
✓ Branch 5 taken 86121 times.
✓ Branch 6 taken 133687 times.
 220282 e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); //11..21
53 220282 return (a ^ e) - e;
54 }
55 }
56
57 16911791 static inline int get_symbol2(RangeCoder *c, uint8_t *state, int log2)
58 {
59
2/2
✓ Branch 0 taken 7098528 times.
✓ Branch 1 taken 9813263 times.
 16911791 int r = log2 >= 0 ? 1 << log2 : 1;
60 16911791 int v = 0;
61
62 av_assert2(log2 >= -4);
63
64
3/4
✓ Branch 0 taken 29334192 times.
✗ Branch 1 not taken.
✓ Branch 3 taken 12422401 times.
✓ Branch 4 taken 16911791 times.
 29334192 while (log2 < 28 && get_rac(c, state + 4 + log2)) {
65 12422401 v += r;
66 12422401 log2++;
67
2/2
✓ Branch 0 taken 9046645 times.
✓ Branch 1 taken 3375756 times.
 12422401 if (log2 > 0) r += r;
68 }
69
70
2/2
✓ Branch 0 taken 17602466 times.
✓ Branch 1 taken 16911791 times.
 34514257 for (int i = log2 - 1; i >= 0; i--)
71 17602466 v += get_rac(c, state + 31 - i) << i;
72
73 16911791 return v;
74 }
75
76 23760 static void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, int orientation)
77 {
78 23760 const int w = b->width;
79 23760 const int h = b->height;
80
81 int run, runs;
82 23760 x_and_coeff *xc = b->x_coeff;
83 23760 x_and_coeff *prev_xc = NULL;
84 23760 x_and_coeff *prev2_xc = xc;
85
2/2
✓ Branch 0 taken 17820 times.
✓ Branch 1 taken 5940 times.
 23760 x_and_coeff *parent_xc = parent ? parent->x_coeff : NULL;
86 23760 x_and_coeff *prev_parent_xc = parent_xc;
87
88 23760 runs = get_symbol2(&s->c, b->state[30], 0);
89
2/2
✓ Branch 0 taken 18439 times.
✓ Branch 1 taken 5321 times.
 23760 if (runs-- > 0) run = get_symbol2(&s->c, b->state[1], 3);
90 5321 else run = INT_MAX;
91
92
2/2
✓ Branch 0 taken 404798 times.
✓ Branch 1 taken 23760 times.
 428558 for (int y = 0; y < h; y++) {
93 404798 int v = 0;
94 404798 int lt = 0, t = 0, rt = 0;
95
96
4/4
✓ Branch 0 taken 381038 times.
✓ Branch 1 taken 23760 times.
✓ Branch 2 taken 216273 times.
✓ Branch 3 taken 164765 times.
 404798 if (y && prev_xc->x == 0)
97 216273 rt = prev_xc->coeff;
98
99
2/2
✓ Branch 0 taken 25574177 times.
✓ Branch 1 taken 404798 times.
 25978975 for (int x = 0; x < w; x++) {
100 25574177 int p = 0;
101 25574177 const int l = v;
102
103 25574177 lt= t; t= rt;
104
105
2/2
✓ Branch 0 taken 25110960 times.
✓ Branch 1 taken 463217 times.
 25574177 if (y) {
106
2/2
✓ Branch 0 taken 16288496 times.
✓ Branch 1 taken 8822464 times.
 25110960 if (prev_xc->x <= x)
107 16288496 prev_xc++;
108
2/2
✓ Branch 0 taken 16072223 times.
✓ Branch 1 taken 9038737 times.
 25110960 if (prev_xc->x == x + 1)
109 16072223 rt = prev_xc->coeff;
110 else
111 9038737 rt = 0;
112 }
113
2/2
✓ Branch 0 taken 25465484 times.
✓ Branch 1 taken 108693 times.
 25574177 if (parent_xc) {
114
2/2
✓ Branch 0 taken 8537101 times.
✓ Branch 1 taken 16928383 times.
 25465484 if (x>>1 > parent_xc->x)
115 8537101 parent_xc++;
116
2/2
✓ Branch 0 taken 17518670 times.
✓ Branch 1 taken 7946814 times.
 25465484 if (x>>1 == parent_xc->x)
117 17518670 p = parent_xc->coeff;
118 }
119
2/2
✓ Branch 0 taken 24629633 times.
✓ Branch 1 taken 944544 times.
 25574177 if (/*ll|*/l|lt|t|rt|p) {
120 24629633 int context = av_log2(/*FFABS(ll) + */3*(l>>1) + (lt>>1) + (t&~1) + (rt>>1) + (p>>1));
121
122 24629633 v = get_rac(&s->c, &b->state[0][context]);
123
2/2
✓ Branch 0 taken 16278923 times.
✓ Branch 1 taken 8350710 times.
 24629633 if (v) {
124 16278923 v = 2*(get_symbol2(&s->c, b->state[context + 2], context-4) + 1);
125 16278923 v += get_rac(&s->c, &b->state[0][16 + 1 + 3 + ff_quant3bA[l&0xFF] + 3 * ff_quant3bA[t&0xFF]]);
126
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 16278923 times.
 16278923 if ((uint16_t)v != v) {
127 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
128 ✗ v = 1;
129 }
130 16278923 xc->x = x;
131 16278923 (xc++)->coeff = v;
132 }
133 } else {
134
2/2
✓ Branch 0 taken 304554 times.
✓ Branch 1 taken 639990 times.
 944544 if (!run) {
135
2/2
✓ Branch 0 taken 286115 times.
✓ Branch 1 taken 18439 times.
 304554 if (runs-- > 0) run = get_symbol2(&s->c, b->state[1], 3);
136 18439 else run = INT_MAX;
137 304554 v = 2 * (get_symbol2(&s->c, b->state[0 + 2], 0-4) + 1);
138 304554 v += get_rac(&s->c, &b->state[0][16 + 1 + 3]);
139
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 304554 times.
 304554 if ((uint16_t)v != v) {
140 ✗ av_log(s->avctx, AV_LOG_ERROR, "Coefficient damaged\n");
141 ✗ v = 1;
142 }
143
144 304554 xc->x = x;
145 304554 (xc++)->coeff = v;
146 } else {
147 int max_run;
148 639990 run--;
149 639990 v = 0;
150 av_assert2(run >= 0);
151
4/4
✓ Branch 0 taken 605642 times.
✓ Branch 1 taken 34348 times.
✓ Branch 2 taken 371736 times.
✓ Branch 3 taken 233906 times.
 639990 if (y) max_run = FFMIN(run, prev_xc->x - x - 2);
152
2/2
✓ Branch 0 taken 9534 times.
✓ Branch 1 taken 24814 times.
 34348 else max_run = FFMIN(run, w-x-1);
153
2/2
✓ Branch 0 taken 635408 times.
✓ Branch 1 taken 4582 times.
 639990 if (parent_xc)
154
2/2
✓ Branch 0 taken 147132 times.
✓ Branch 1 taken 488276 times.
 635408 max_run = FFMIN(max_run, 2*parent_xc->x - x - 1);
155 av_assert2(max_run >= 0 && max_run <= run);
156
157 639990 x += max_run;
158 639990 run -= max_run;
159 }
160 }
161 }
162 404798 (xc++)->x = w+1; //end marker
163 404798 prev_xc = prev2_xc;
164 404798 prev2_xc = xc;
165
166
2/2
✓ Branch 0 taken 387506 times.
✓ Branch 1 taken 17292 times.
 404798 if (parent_xc) {
167
2/2
✓ Branch 0 taken 193104 times.
✓ Branch 1 taken 194402 times.
 387506 if (y & 1) {
168
2/2
✓ Branch 0 taken 111590 times.
✓ Branch 1 taken 193104 times.
 304694 while (parent_xc->x != parent->width+1)
169 111590 parent_xc++;
170 193104 parent_xc++;
171 193104 prev_parent_xc= parent_xc;
172 } else {
173 194402 parent_xc= prev_parent_xc;
174 }
175 }
176 }
177
178 23760 (xc++)->x = w + 1; //end marker
179 23760 }
180
181 22719 static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){
182 22719 Plane *p= &s->plane[plane_index];
183 22719 const int mb_w= s->b_width << s->block_max_depth;
184 22719 const int mb_h= s->b_height << s->block_max_depth;
185 int x, y, mb_x;
186 22719 int block_size = MB_SIZE >> s->block_max_depth;
187
2/2
✓ Branch 0 taken 15146 times.
✓ Branch 1 taken 7573 times.
 22719 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
188
2/2
✓ Branch 0 taken 15146 times.
✓ Branch 1 taken 7573 times.
 22719 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
189
2/2
✓ Branch 0 taken 15146 times.
✓ Branch 1 taken 7573 times.
 22719 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
190
2/2
✓ Branch 0 taken 15146 times.
✓ Branch 1 taken 7573 times.
 22719 int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
191 22719 int ref_stride= s->current_picture->linesize[plane_index];
192 22719 uint8_t *dst8= s->current_picture->data[plane_index];
193 22719 int w= p->width;
194 22719 int h= p->height;
195
196
3/4
✓ Branch 0 taken 19935 times.
✓ Branch 1 taken 2784 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 19935 times.
 22719 if(s->keyframe || (s->avctx->debug&512)){
197
2/2
✓ Branch 0 taken 180 times.
✓ Branch 1 taken 2604 times.
 2784 if(mb_y==mb_h)
198 180 return;
199
200
1/2
✓ Branch 0 taken 2604 times.
✗ Branch 1 not taken.
 2604 if(add){
201
2/2
✓ Branch 0 taken 16832 times.
✓ Branch 1 taken 2604 times.
 19436 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
202 // DWTELEM * line = slice_buffer_get_line(sb, y);
203 16832 IDWTELEM * line = sb->line[y];
204
2/2
✓ Branch 0 taken 3495936 times.
✓ Branch 1 taken 16832 times.
 3512768 for(x=0; x<w; x++){
205 // int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
206 3495936 int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
207 3495936 v >>= FRAC_BITS;
208
2/2
✓ Branch 0 taken 139 times.
✓ Branch 1 taken 3495797 times.
 3495936 if(v&(~255)) v= ~(v>>31);
209 3495936 dst8[x + y*ref_stride]= v;
210 }
211 }
212 }else{
213 ✗ for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
214 // DWTELEM * line = slice_buffer_get_line(sb, y);
215 ✗ IDWTELEM * line = sb->line[y];
216 ✗ for(x=0; x<w; x++){
217 ✗ line[x] -= 128 << FRAC_BITS;
218 // buf[x + y*w]-= 128<<FRAC_BITS;
219 }
220 }
221 }
222
223 2604 return;
224 }
225
226
2/2
✓ Branch 0 taken 721575 times.
✓ Branch 1 taken 19935 times.
 741510 for(mb_x=0; mb_x<=mb_w; mb_x++){
227 721575 add_yblock(s, 1, sb, old_buffer, dst8, obmc,
228 721575 block_w*mb_x - block_w/2,
229 721575 block_h*mb_y - block_h/2,
230 block_w, block_h,
231 w, h,
232 w, ref_stride, obmc_stride,
233 mb_x - 1, mb_y - 1,
234 add, 0, plane_index);
235 }
236
237
1/6
✗ Branch 0 not taken.
✓ Branch 1 taken 19935 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 19935 if(s->avmv && mb_y < mb_h && plane_index == 0)
238 ✗ for(mb_x=0; mb_x<mb_w; mb_x++){
239 ✗ AVMotionVector *avmv = s->avmv + s->avmv_index;
240 ✗ const int b_width = s->b_width << s->block_max_depth;
241 ✗ const int b_stride= b_width;
242 ✗ BlockNode *bn= &s->block[mb_x + mb_y*b_stride];
243
244 ✗ if (bn->type)
245 ✗ continue;
246
247 ✗ s->avmv_index++;
248
249 ✗ avmv->w = block_w;
250 ✗ avmv->h = block_h;
251 ✗ avmv->dst_x = block_w*mb_x - block_w/2;
252 ✗ avmv->dst_y = block_h*mb_y - block_h/2;
253 ✗ avmv->motion_scale = 8;
254 ✗ avmv->motion_x = bn->mx * s->mv_scale;
255 ✗ avmv->motion_y = bn->my * s->mv_scale;
256 ✗ avmv->src_x = avmv->dst_x + avmv->motion_x / 8;
257 ✗ avmv->src_y = avmv->dst_y + avmv->motion_y / 8;
258 ✗ avmv->source= -1 - bn->ref;
259 ✗ avmv->flags = 0;
260 }
261 }
262
263 165106 static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
264 165106 const int w= b->width;
265 int y;
266 165106 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
267 165106 int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
268 165106 int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
269 165106 int new_index = 0;
270
271
4/4
✓ Branch 0 taken 163467 times.
✓ Branch 1 taken 1639 times.
✓ Branch 2 taken 129189 times.
✓ Branch 3 taken 34278 times.
 165106 if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
272 130828 qadd= 0;
273 130828 qmul= 1<<QEXPSHIFT;
274 }
275
276 /* If we are on the second or later slice, restore our index. */
277
2/2
✓ Branch 0 taken 141346 times.
✓ Branch 1 taken 23760 times.
 165106 if (start_y != 0)
278 141346 new_index = save_state[0];
279
280
281
2/2
✓ Branch 0 taken 404798 times.
✓ Branch 1 taken 165106 times.
 569904 for(y=start_y; y<h; y++){
282 404798 int x = 0;
283 int v;
284
2/2
✓ Branch 0 taken 280179 times.
✓ Branch 1 taken 124619 times.
 404798 IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
285 404798 memset(line, 0, b->width*sizeof(IDWTELEM));
286 404798 v = b->x_coeff[new_index].coeff;
287 404798 x = b->x_coeff[new_index++].x;
288
2/2
✓ Branch 0 taken 16583477 times.
✓ Branch 1 taken 404798 times.
 16988275 while(x < w){
289 16583477 register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT;
290 16583477 register int u= -(v&1);
291 16583477 line[x] = (t^u) - u;
292
293 16583477 v = b->x_coeff[new_index].coeff;
294 16583477 x = b->x_coeff[new_index++].x;
295 }
296 }
297
298 /* Save our variables for the next slice. */
299 165106 save_state[0] = new_index;
300
301 165106 return;
302 }
303
304 254226 static int decode_q_branch(SnowContext *s, int level, int x, int y){
305 254226 const int w= s->b_width << s->block_max_depth;
306 254226 const int rem_depth= s->block_max_depth - level;
307 254226 const int index= (x + y*w) << rem_depth;
308 254226 int trx= (x+1)<<rem_depth;
309
2/2
✓ Branch 0 taken 245738 times.
✓ Branch 1 taken 8488 times.
 254226 const BlockNode *left = x ? &s->block[index-1] : &null_block;
310
2/2
✓ Branch 0 taken 242936 times.
✓ Branch 1 taken 11290 times.
 254226 const BlockNode *top = y ? &s->block[index-w] : &null_block;
311
4/4
✓ Branch 0 taken 242936 times.
✓ Branch 1 taken 11290 times.
✓ Branch 2 taken 235058 times.
✓ Branch 3 taken 7878 times.
 254226 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
312
8/8
✓ Branch 0 taken 242936 times.
✓ Branch 1 taken 11290 times.
✓ Branch 2 taken 234942 times.
✓ Branch 3 taken 7994 times.
✓ Branch 4 taken 113610 times.
✓ Branch 5 taken 121332 times.
✓ Branch 6 taken 30303 times.
✓ Branch 7 taken 83307 times.
 254226 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
313 254226 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
314 int res;
315
316
2/2
✓ Branch 0 taken 9104 times.
✓ Branch 1 taken 245122 times.
 254226 if(s->keyframe){
317 9104 set_blocks(s, level, x, y, null_block.color[0], null_block.color[1], null_block.color[2], null_block.mx, null_block.my, null_block.ref, BLOCK_INTRA);
318 9104 return 0;
319 }
320
321
4/4
✓ Branch 0 taken 53460 times.
✓ Branch 1 taken 191662 times.
✓ Branch 3 taken 8447 times.
✓ Branch 4 taken 45013 times.
 445231 if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
322 int type, mx, my;
323 200109 int l = left->color[0];
324 200109 int cb= left->color[1];
325 200109 int cr= left->color[2];
326 200109 unsigned ref = 0;
327 200109 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
328 200109 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
329 200109 int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
330
331 200109 type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
332
2/2
✓ Branch 0 taken 57 times.
✓ Branch 1 taken 200052 times.
 200109 if(type){
333 int ld, cbd, crd;
334 57 pred_mv(s, &mx, &my, 0, left, top, tr);
335 57 ld = get_symbol(&s->c, &s->block_state[32], 1);
336
2/4
✓ Branch 0 taken 57 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 57 times.
 57 if (ld < -255 || ld > 255) {
337 ✗ return AVERROR_INVALIDDATA;
338 }
339 57 l += ld;
340
1/2
✓ Branch 0 taken 57 times.
✗ Branch 1 not taken.
 57 if (s->nb_planes > 2) {
341 57 cbd = get_symbol(&s->c, &s->block_state[64], 1);
342 57 crd = get_symbol(&s->c, &s->block_state[96], 1);
343
4/8
✓ Branch 0 taken 57 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 57 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 57 times.
✗ Branch 5 not taken.
✗ Branch 6 not taken.
✓ Branch 7 taken 57 times.
 57 if (cbd < -255 || cbd > 255 || crd < -255 || crd > 255) {
344 ✗ return AVERROR_INVALIDDATA;
345 }
346 57 cb += cbd;
347 57 cr += crd;
348 }
349 }else{
350
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 200052 times.
 200052 if(s->ref_frames > 1)
351 ✗ ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
352
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 200052 times.
 200052 if (ref >= s->ref_frames) {
353 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid ref\n");
354 ✗ return AVERROR_INVALIDDATA;
355 }
356 200052 pred_mv(s, &mx, &my, ref, left, top, tr);
357
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 200052 times.
 200052 mx+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
358
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 200052 times.
 200052 my+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
359 }
360 200109 set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
361 }else{
362
2/4
✓ Branch 1 taken 45013 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 45013 times.
✗ Branch 4 not taken.
 90026 if ((res = decode_q_branch(s, level+1, 2*x+0, 2*y+0)) < 0 ||
363
1/2
✓ Branch 1 taken 45013 times.
✗ Branch 2 not taken.
 90026 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+0)) < 0 ||
364
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 45013 times.
 90026 (res = decode_q_branch(s, level+1, 2*x+0, 2*y+1)) < 0 ||
365 45013 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+1)) < 0)
366 ✗ return res;
367 }
368 245122 return 0;
369 }
370
371 1639 static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
372 1639 const int w= b->width;
373 1639 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
374 1639 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
375 1639 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
376 int x,y;
377
378
2/2
✓ Branch 0 taken 616 times.
✓ Branch 1 taken 1023 times.
 1639 if(s->qlog == LOSSLESS_QLOG) return;
379
380
2/2
✓ Branch 0 taken 1602 times.
✓ Branch 1 taken 1023 times.
 2625 for(y=start_y; y<end_y; y++){
381 // DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
382
1/2
✓ Branch 0 taken 1602 times.
✗ Branch 1 not taken.
 1602 IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
383
2/2
✓ Branch 0 taken 5316 times.
✓ Branch 1 taken 1602 times.
 6918 for(x=0; x<w; x++){
384 5316 int i= line[x];
385
2/2
✓ Branch 0 taken 2022 times.
✓ Branch 1 taken 3294 times.
 5316 if(i<0){
386 2022 line[x]= -((-i*(unsigned)qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
387
2/2
✓ Branch 0 taken 1456 times.
✓ Branch 1 taken 1838 times.
 3294 }else if(i>0){
388 1456 line[x]= (( i*(unsigned)qmul + qadd)>>(QEXPSHIFT));
389 }
390 }
391 }
392 }
393
394 1639 static void correlate_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int inverse, int use_median, int start_y, int end_y){
395 1639 const int w= b->width;
396 int x,y;
397
398 1639 IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
399 IDWTELEM * prev;
400
401
2/2
✓ Branch 0 taken 154 times.
✓ Branch 1 taken 1485 times.
 1639 if (start_y != 0)
402
1/2
✓ Branch 0 taken 154 times.
✗ Branch 1 not taken.
 154 line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
403
404
2/2
✓ Branch 0 taken 4528 times.
✓ Branch 1 taken 1639 times.
 6167 for(y=start_y; y<end_y; y++){
405 4528 prev = line;
406 // line = slice_buffer_get_line_from_address(sb, src + (y * stride));
407
1/2
✓ Branch 0 taken 4528 times.
✗ Branch 1 not taken.
 4528 line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
408
2/2
✓ Branch 0 taken 29802 times.
✓ Branch 1 taken 4528 times.
 34330 for(x=0; x<w; x++){
409
2/2
✓ Branch 0 taken 25274 times.
✓ Branch 1 taken 4528 times.
 29802 if(x){
410
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 25274 times.
 25274 if(use_median){
411 ✗ if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
412 ✗ else line[x] += line[x - 1];
413 }else{
414
2/2
✓ Branch 0 taken 20353 times.
✓ Branch 1 taken 4921 times.
 25274 if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
415 4921 else line[x] += line[x - 1];
416 }
417 }else{
418
2/2
✓ Branch 0 taken 3043 times.
✓ Branch 1 taken 1485 times.
 4528 if(y) line[x] += prev[x];
419 }
420 }
421 }
422 1639 }
423
424 60 static void decode_qlogs(SnowContext *s){
425 int plane_index, level, orientation;
426
427
2/2
✓ Branch 0 taken 180 times.
✓ Branch 1 taken 60 times.
 240 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
428
2/2
✓ Branch 0 taken 900 times.
✓ Branch 1 taken 180 times.
 1080 for(level=0; level<s->spatial_decomposition_count; level++){
429
2/2
✓ Branch 0 taken 2880 times.
✓ Branch 1 taken 900 times.
 3780 for(orientation=level ? 1:0; orientation<4; orientation++){
430 int q;
431
2/2
✓ Branch 0 taken 960 times.
✓ Branch 1 taken 1920 times.
 2880 if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
432
2/2
✓ Branch 0 taken 600 times.
✓ Branch 1 taken 1320 times.
 1920 else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
433 1320 else q= get_symbol(&s->c, s->header_state, 1);
434 2880 s->plane[plane_index].band[level][orientation].qlog= q;
435 }
436 }
437 }
438 60 }
439
440 #define GET_S(dst, check) \
441 tmp= get_symbol(&s->c, s->header_state, 0);\
442 if(!(check)){\
443 av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
444 return AVERROR_INVALIDDATA;\
445 }\
446 dst= tmp;
447
448 495 static int decode_header(SnowContext *s){
449 int plane_index, tmp;
450 uint8_t kstate[32];
451
452 495 memset(kstate, MID_STATE, sizeof(kstate));
453
454 495 s->keyframe= get_rac(&s->c, kstate);
455
3/4
✓ Branch 0 taken 435 times.
✓ Branch 1 taken 60 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 435 times.
 495 if(s->keyframe || s->always_reset){
456 60 ff_snow_reset_contexts(s);
457 60 s->spatial_decomposition_type=
458 60 s->qlog=
459 60 s->qbias=
460 60 s->mv_scale=
461 60 s->block_max_depth= 0;
462 }
463
2/2
✓ Branch 0 taken 60 times.
✓ Branch 1 taken 435 times.
 495 if(s->keyframe){
464
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 60 times.
 60 GET_S(s->version, tmp <= 0U)
465 60 s->always_reset= get_rac(&s->c, s->header_state);
466 60 s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
467 60 s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
468
2/4
✓ Branch 1 taken 60 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 60 times.
 60 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
469 60 s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
470
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 60 times.
 60 if (s->colorspace_type == 1) {
471 ✗ s->avctx->pix_fmt= AV_PIX_FMT_GRAY8;
472 ✗ s->nb_planes = 1;
473
1/2
✓ Branch 0 taken 60 times.
✗ Branch 1 not taken.
 60 } else if(s->colorspace_type == 0) {
474 60 s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
475 60 s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
476
477
2/4
✓ Branch 0 taken 60 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 60 times.
✗ Branch 3 not taken.
 60 if(s->chroma_h_shift == 1 && s->chroma_v_shift==1){
478 60 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
479 ✗ }else if(s->chroma_h_shift == 0 && s->chroma_v_shift==0){
480 ✗ s->avctx->pix_fmt= AV_PIX_FMT_YUV444P;
481 ✗ }else if(s->chroma_h_shift == 2 && s->chroma_v_shift==2){
482 ✗ s->avctx->pix_fmt= AV_PIX_FMT_YUV410P;
483 } else {
484 ✗ av_log(s->avctx, AV_LOG_ERROR,
485 "unsupported color subsample mode %d %d\n",
486 s->chroma_h_shift, s->chroma_v_shift);
487 ✗ s->chroma_h_shift = s->chroma_v_shift = 1;
488 ✗ s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
489 ✗ return AVERROR_INVALIDDATA;
490 }
491 60 s->nb_planes = 3;
492 } else {
493 ✗ av_log(s->avctx, AV_LOG_ERROR, "unsupported color space\n");
494 ✗ s->chroma_h_shift = s->chroma_v_shift = 1;
495 ✗ s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
496 ✗ return AVERROR_INVALIDDATA;
497 }
498
499
500 60 s->spatial_scalability= get_rac(&s->c, s->header_state);
501 // s->rate_scalability= get_rac(&s->c, s->header_state);
502
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 60 times.
 60 GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
503 60 s->max_ref_frames++;
504
505 60 decode_qlogs(s);
506 }
507
508
2/2
✓ Branch 0 taken 435 times.
✓ Branch 1 taken 60 times.
 495 if(!s->keyframe){
509
2/2
✓ Branch 1 taken 49 times.
✓ Branch 2 taken 386 times.
 435 if(get_rac(&s->c, s->header_state)){
510
2/2
✓ Branch 0 taken 98 times.
✓ Branch 1 taken 49 times.
 147 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
511 98 int htaps, i, sum=0;
512 98 Plane *p= &s->plane[plane_index];
513 98 p->diag_mc= get_rac(&s->c, s->header_state);
514 98 htaps= get_symbol(&s->c, s->header_state, 0);
515
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 98 times.
 98 if((unsigned)htaps >= HTAPS_MAX/2 - 1)
516 ✗ return AVERROR_INVALIDDATA;
517 98 htaps = htaps*2 + 2;
518 98 p->htaps= htaps;
519
2/2
✓ Branch 0 taken 294 times.
✓ Branch 1 taken 98 times.
 392 for(i= htaps/2; i; i--){
520 294 unsigned hcoeff = get_symbol(&s->c, s->header_state, 0);
521
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 294 times.
 294 if (hcoeff > 127)
522 ✗ return AVERROR_INVALIDDATA;
523 294 p->hcoeff[i]= hcoeff * (1-2*(i&1));
524 294 sum += p->hcoeff[i];
525 }
526 98 p->hcoeff[0]= 32-sum;
527 }
528 49 s->plane[2].diag_mc= s->plane[1].diag_mc;
529 49 s->plane[2].htaps = s->plane[1].htaps;
530 49 memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
531 }
532
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 435 times.
 435 if(get_rac(&s->c, s->header_state)){
533 ✗ GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
534 ✗ decode_qlogs(s);
535 }
536 }
537
538 495 s->spatial_decomposition_type+= (unsigned)get_symbol(&s->c, s->header_state, 1);
539
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if(s->spatial_decomposition_type > 1U){
540 ✗ av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported\n", s->spatial_decomposition_type);
541 ✗ return AVERROR_INVALIDDATA;
542 }
543 495 if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
544
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){
545 ✗ av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);
546 ✗ return AVERROR_INVALIDDATA;
547 }
548
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (s->avctx->width > 65536-4) {
549 ✗ av_log(s->avctx, AV_LOG_ERROR, "Width %d is too large\n", s->avctx->width);
550 ✗ return AVERROR_INVALIDDATA;
551 }
552
553
554 495 s->qlog += (unsigned)get_symbol(&s->c, s->header_state, 1);
555 495 s->mv_scale += (unsigned)get_symbol(&s->c, s->header_state, 1);
556 495 s->qbias += (unsigned)get_symbol(&s->c, s->header_state, 1);
557 495 s->block_max_depth+= (unsigned)get_symbol(&s->c, s->header_state, 1);
558
3/6
✓ Branch 0 taken 495 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 495 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 495 times.
 495 if(s->block_max_depth > 1 || s->block_max_depth < 0 || s->mv_scale > 256U){
559 ✗ av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);
560 ✗ s->block_max_depth= 0;
561 ✗ s->mv_scale = 0;
562 ✗ return AVERROR_INVALIDDATA;
563 }
564
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (FFABS(s->qbias) > 127) {
565 ✗ av_log(s->avctx, AV_LOG_ERROR, "qbias %d is too large\n", s->qbias);
566 ✗ s->qbias = 0;
567 ✗ return AVERROR_INVALIDDATA;
568 }
569
570 495 return 0;
571 }
572
573 495 static int decode_blocks(SnowContext *s){
574 int x, y;
575 495 int w= s->b_width;
576 495 int h= s->b_height;
577 int res;
578
579
2/2
✓ Branch 0 taken 4306 times.
✓ Branch 1 taken 495 times.
 4801 for(y=0; y<h; y++){
580
2/2
✓ Branch 0 taken 74174 times.
✓ Branch 1 taken 4306 times.
 78480 for(x=0; x<w; x++){
581
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 74174 times.
 74174 if (s->c.bytestream >= s->c.bytestream_end)
582 ✗ return AVERROR_INVALIDDATA;
583
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 74174 times.
 74174 if ((res = decode_q_branch(s, 0, x, y)) < 0)
584 ✗ return res;
585 }
586 }
587 495 return 0;
588 }
589
590 495 static int decode_frame(AVCodecContext *avctx, AVFrame *picture,
591 int *got_frame, AVPacket *avpkt)
592 {
593 495 const uint8_t *buf = avpkt->data;
594 495 int buf_size = avpkt->size;
595 495 SnowContext *s = avctx->priv_data;
596 495 RangeCoder * const c= &s->c;
597 int bytes_read;
598 int level, orientation, plane_index;
599 int res;
600
601 495 ff_init_range_decoder(c, buf, buf_size);
602 495 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
603
604 495 s->current_picture->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
605
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 495 times.
 495 if ((res = decode_header(s)) < 0)
606 ✗ return res;
607
608
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (avctx->debug & 2048) {
609 ✗ av_frame_unref(s->mconly_picture);
610 ✗ res = ff_get_buffer(avctx, s->mconly_picture, AV_GET_BUFFER_FLAG_REF);
611 ✗ if (res < 0)
612 ✗ return res;
613 }
614
615
3/4
✓ Branch 0 taken 473 times.
✓ Branch 1 taken 22 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 473 times.
 495 if (s->current_picture->data[0] && s->current_picture->format != avctx->pix_fmt) {
616 ✗ av_log(avctx, AV_LOG_ERROR, "pixel format changed\n");
617 ✗ return AVERROR_PATCHWELCOME;
618 }
619
620
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 495 times.
 495 if ((res=ff_snow_common_init_after_header(avctx)) < 0)
621 ✗ return res;
622
623 // realloc slice buffer for the case that spatial_decomposition_count changed
624 495 ff_slice_buffer_destroy(&s->sb);
625
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,
626 495 (MB_SIZE >> s->block_max_depth) +
627 495 s->spatial_decomposition_count * 11 + 1,
628 s->plane[0].width,
629 s->spatial_idwt_buffer)) < 0)
630 ✗ return res;
631
632
2/2
✓ Branch 0 taken 1485 times.
✓ Branch 1 taken 495 times.
 1980 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
633 1485 Plane *p= &s->plane[plane_index];
634
2/4
✓ Branch 0 taken 1419 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 1419 times.
✗ Branch 3 not taken.
 2904 p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
635
1/2
✓ Branch 0 taken 1419 times.
✗ Branch 1 not taken.
 1419 && p->hcoeff[1]==-10
636
3/4
✓ Branch 0 taken 1419 times.
✓ Branch 1 taken 66 times.
✓ Branch 2 taken 1419 times.
✗ Branch 3 not taken.
 2904 && p->hcoeff[2]==2;
637 }
638
639 495 ff_snow_alloc_blocks(s);
640
641
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 495 times.
 495 if ((res = ff_snow_frames_prepare(s)) < 0)
642 ✗ return res;
643
644 495 s->current_picture->width = s->avctx->width;
645 495 s->current_picture->height = s->avctx->height;
646 495 res = ff_get_buffer(s->avctx, s->current_picture, AV_GET_BUFFER_FLAG_REF);
647
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (res < 0)
648 ✗ return res;
649
650
2/2
✓ Branch 0 taken 60 times.
✓ Branch 1 taken 435 times.
 495 s->current_picture->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
651
652 //keyframe flag duplication mess FIXME
653
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if(avctx->debug&FF_DEBUG_PICT_INFO)
654 ✗ av_log(avctx, AV_LOG_ERROR,
655 "keyframe:%d qlog:%d qbias: %d mvscale: %d "
656 "decomposition_type:%d decomposition_count:%d\n",
657 s->keyframe, s->qlog, s->qbias, s->mv_scale,
658 s->spatial_decomposition_type,
659 s->spatial_decomposition_count
660 );
661
662
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_MVS) {
663 size_t size;
664 ✗ res = av_size_mult(s->b_width * s->b_height, sizeof(AVMotionVector) << (s->block_max_depth*2), &size);
665 ✗ if (res)
666 ✗ return res;
667 ✗ av_fast_malloc(&s->avmv, &s->avmv_size, size);
668 ✗ if (!s->avmv)
669 ✗ return AVERROR(ENOMEM);
670 } else {
671 495 s->avmv_size = 0;
672 495 av_freep(&s->avmv);
673 }
674 495 s->avmv_index = 0;
675
676
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 495 times.
 495 if ((res = decode_blocks(s)) < 0)
677 ✗ return res;
678
679
2/2
✓ Branch 0 taken 1485 times.
✓ Branch 1 taken 495 times.
 1980 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
680 1485 Plane *p= &s->plane[plane_index];
681 1485 int w= p->width;
682 1485 int h= p->height;
683 int x, y;
684 int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
685
686
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1485 times.
 1485 if(s->avctx->debug&2048){
687 ✗ memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
688 ✗ predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
689
690 ✗ for(y=0; y<h; y++){
691 ✗ for(x=0; x<w; x++){
692 ✗ int v= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x];
693 ✗ s->mconly_picture->data[plane_index][y*s->mconly_picture->linesize[plane_index] + x]= v;
694 }
695 }
696 }
697
698
2/2
✓ Branch 0 taken 7425 times.
✓ Branch 1 taken 1485 times.
 8910 for(level=0; level<s->spatial_decomposition_count; level++){
699
2/2
✓ Branch 0 taken 23760 times.
✓ Branch 1 taken 7425 times.
 31185 for(orientation=level ? 1 : 0; orientation<4; orientation++){
700 23760 SubBand *b= &p->band[level][orientation];
701 23760 unpack_coeffs(s, b, b->parent, orientation);
702 }
703 }
704
705 {
706 1485 const int mb_h= s->b_height << s->block_max_depth;
707 1485 const int block_size = MB_SIZE >> s->block_max_depth;
708
2/2
✓ Branch 0 taken 990 times.
✓ Branch 1 taken 495 times.
 1485 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
709 int mb_y;
710 DWTCompose cs[MAX_DECOMPOSITIONS];
711 1485 int yd=0, yq=0;
712 int y;
713 int end_y;
714
715 1485 ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
716
2/2
✓ Branch 0 taken 22719 times.
✓ Branch 1 taken 1485 times.
 24204 for(mb_y=0; mb_y<=mb_h; mb_y++){
717
718 22719 int slice_starty = block_h*mb_y;
719 22719 int slice_h = block_h*(mb_y+1);
720
721
3/4
✓ Branch 0 taken 19935 times.
✓ Branch 1 taken 2784 times.
✓ Branch 2 taken 19935 times.
✗ Branch 3 not taken.
 22719 if (!(s->keyframe || s->avctx->debug&512)){
722 19935 slice_starty = FFMAX(0, slice_starty - (block_h >> 1));
723 19935 slice_h -= (block_h >> 1);
724 }
725
726
2/2
✓ Branch 0 taken 113595 times.
✓ Branch 1 taken 22719 times.
 136314 for(level=0; level<s->spatial_decomposition_count; level++){
727
2/2
✓ Branch 0 taken 363504 times.
✓ Branch 1 taken 113595 times.
 477099 for(orientation=level ? 1 : 0; orientation<4; orientation++){
728 363504 SubBand *b= &p->band[level][orientation];
729 int start_y;
730 int end_y;
731 363504 int our_mb_start = mb_y;
732 363504 int our_mb_end = (mb_y + 1);
733 363504 const int extra= 3;
734
2/2
✓ Branch 0 taken 339744 times.
✓ Branch 1 taken 23760 times.
 363504 start_y = (mb_y ? ((block_h * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
735 363504 end_y = (((block_h * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
736
3/4
✓ Branch 0 taken 318960 times.
✓ Branch 1 taken 44544 times.
✓ Branch 2 taken 318960 times.
✗ Branch 3 not taken.
 363504 if (!(s->keyframe || s->avctx->debug&512)){
737 318960 start_y = FFMAX(0, start_y - (block_h >> (1+s->spatial_decomposition_count - level)));
738 318960 end_y = FFMAX(0, end_y - (block_h >> (1+s->spatial_decomposition_count - level)));
739 }
740 363504 start_y = FFMIN(b->height, start_y);
741 363504 end_y = FFMIN(b->height, end_y);
742
743
2/2
✓ Branch 0 taken 165106 times.
✓ Branch 1 taken 198398 times.
 363504 if (start_y != end_y){
744
2/2
✓ Branch 0 taken 1639 times.
✓ Branch 1 taken 163467 times.
 165106 if (orientation == 0){
745 1639 SubBand * correlate_band = &p->band[0][0];
746 1639 int correlate_end_y = FFMIN(b->height, end_y + 1);
747
2/2
✓ Branch 0 taken 154 times.
✓ Branch 1 taken 1485 times.
 1639 int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
748 1639 decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
749 1639 correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
750 1639 dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
751 }
752 else
753 163467 decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
754 }
755 }
756 }
757
758
2/2
✓ Branch 0 taken 36457 times.
✓ Branch 1 taken 22719 times.
 59176 for(; yd<slice_h; yd+=4){
759 36457 ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, s->temp_idwt_buffer, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
760 }
761
762
2/2
✓ Branch 0 taken 17094 times.
✓ Branch 1 taken 5625 times.
 22719 if(s->qlog == LOSSLESS_QLOG){
763
4/4
✓ Branch 0 taken 89166 times.
✓ Branch 1 taken 16632 times.
✓ Branch 2 taken 88704 times.
✓ Branch 3 taken 462 times.
 105798 for(; yq<slice_h && yq<h; yq++){
764
1/2
✓ Branch 0 taken 88704 times.
✗ Branch 1 not taken.
 88704 IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
765
2/2
✓ Branch 0 taken 23417856 times.
✓ Branch 1 taken 88704 times.
 23506560 for(x=0; x<w; x++){
766 23417856 line[x] *= 1<<FRAC_BITS;
767 }
768 }
769 }
770
771 22719 predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
772
773 22719 y = FFMIN(p->height, slice_starty);
774 22719 end_y = FFMIN(p->height, slice_h);
775
2/2
✓ Branch 0 taken 137792 times.
✓ Branch 1 taken 22719 times.
 160511 while(y < end_y)
776 137792 ff_slice_buffer_release(&s->sb, y++);
777 }
778
779 1485 ff_slice_buffer_flush(&s->sb);
780 }
781
782 }
783
784 495 emms_c();
785
786 495 av_frame_unref(s->last_picture[s->max_ref_frames - 1]);
787
788
1/2
✓ Branch 0 taken 495 times.
✗ Branch 1 not taken.
 495 if(!(s->avctx->debug&2048))
789 495 res = av_frame_ref(picture, s->current_picture);
790 else
791 ✗ res = av_frame_ref(picture, s->mconly_picture);
792
2/4
✓ Branch 0 taken 495 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 495 times.
 495 if (res >= 0 && s->avmv_index) {
793 AVFrameSideData *sd;
794
795 ✗ sd = av_frame_new_side_data(picture, AV_FRAME_DATA_MOTION_VECTORS, s->avmv_index * sizeof(AVMotionVector));
796 ✗ if (!sd)
797 ✗ return AVERROR(ENOMEM);
798 ✗ memcpy(sd->data, s->avmv, s->avmv_index * sizeof(AVMotionVector));
799 }
800
801
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if (res < 0)
802 ✗ return res;
803
804 495 *got_frame = 1;
805
806 495 bytes_read= c->bytestream - c->bytestream_start;
807
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 495 times.
 495 if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
808
809 495 return bytes_read;
810 }
811
812 22 static av_cold int decode_end(AVCodecContext *avctx)
813 {
814 22 SnowContext *s = avctx->priv_data;
815
816 22 ff_slice_buffer_destroy(&s->sb);
817
818 22 ff_snow_common_end(s);
819
820 22 s->avmv_size = 0;
821 22 av_freep(&s->avmv);
822
823 22 return 0;
824 }
825
826 const FFCodec ff_snow_decoder = {
827 .p.name = "snow",
828 CODEC_LONG_NAME("Snow"),
829 .p.type = AVMEDIA_TYPE_VIDEO,
830 .p.id = AV_CODEC_ID_SNOW,
831 .priv_data_size = sizeof(SnowContext),
832 .init = ff_snow_common_init,
833 .close = decode_end,
834 FF_CODEC_DECODE_CB(decode_frame),
835 .p.capabilities = AV_CODEC_CAP_DR1,
836 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
837 };
838