FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/snowdec.c
Date: 2022-07-05 19:52:29
Exec Total Coverage
Lines: 305 393 77.6%
Branches: 211 312 67.6%

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/intmath.h"
22 #include "libavutil/log.h"
23 #include "libavutil/opt.h"
24 #include "avcodec.h"
25 #include "codec_internal.h"
26 #include "snow_dwt.h"
27 #include "snow.h"
28
29 #include "rangecoder.h"
30 #include "mathops.h"
31
32 21699 static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){
33 21699 Plane *p= &s->plane[plane_index];
34 21699 const int mb_w= s->b_width << s->block_max_depth;
35 21699 const int mb_h= s->b_height << s->block_max_depth;
36 int x, y, mb_x;
37 21699 int block_size = MB_SIZE >> s->block_max_depth;
38
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21699 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
39
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21699 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
40
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21699 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];
41
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21699 int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
42 21699 int ref_stride= s->current_picture->linesize[plane_index];
43 21699 uint8_t *dst8= s->current_picture->data[plane_index];
44 21699 int w= p->width;
45 21699 int h= p->height;
46
47
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21699 if(s->keyframe || (s->avctx->debug&512)){
48
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2664 if(mb_y==mb_h)
49 168 return;
50
51
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2496 if(add){
52
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18176 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
53 // DWTELEM * line = slice_buffer_get_line(sb, y);
54 15680 IDWTELEM * line = sb->line[y];
55
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3359552 for(x=0; x<w; x++){
56 // int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
57 3343872 int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
58 3343872 v >>= FRAC_BITS;
59
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3343872 if(v&(~255)) v= ~(v>>31);
60 3343872 dst8[x + y*ref_stride]= v;
61 }
62 }
63 }else{
64 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
65 // DWTELEM * line = slice_buffer_get_line(sb, y);
66 IDWTELEM * line = sb->line[y];
67 for(x=0; x<w; x++){
68 line[x] -= 128 << FRAC_BITS;
69 // buf[x + y*w]-= 128<<FRAC_BITS;
70 }
71 }
72 }
73
74 2496 return;
75 }
76
77
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729810 for(mb_x=0; mb_x<=mb_w; mb_x++){
78 710775 add_yblock(s, 1, sb, old_buffer, dst8, obmc,
79 710775 block_w*mb_x - block_w/2,
80 710775 block_h*mb_y - block_h/2,
81 block_w, block_h,
82 w, h,
83 w, ref_stride, obmc_stride,
84 mb_x - 1, mb_y - 1,
85 add, 0, plane_index);
86 }
87
88
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19035 if(s->avmv && mb_y < mb_h && plane_index == 0)
89 for(mb_x=0; mb_x<mb_w; mb_x++){
90 AVMotionVector *avmv = s->avmv + s->avmv_index;
91 const int b_width = s->b_width << s->block_max_depth;
92 const int b_stride= b_width;
93 BlockNode *bn= &s->block[mb_x + mb_y*b_stride];
94
95 if (bn->type)
96 continue;
97
98 s->avmv_index++;
99
100 avmv->w = block_w;
101 avmv->h = block_h;
102 avmv->dst_x = block_w*mb_x - block_w/2;
103 avmv->dst_y = block_h*mb_y - block_h/2;
104 avmv->motion_scale = 8;
105 avmv->motion_x = bn->mx * s->mv_scale;
106 avmv->motion_y = bn->my * s->mv_scale;
107 avmv->src_x = avmv->dst_x + avmv->motion_x / 8;
108 avmv->src_y = avmv->dst_y + avmv->motion_y / 8;
109 avmv->source= -1 - bn->ref;
110 avmv->flags = 0;
111 }
112 }
113
114 157912 static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
115 157912 const int w= b->width;
116 int y;
117 157912 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
118 157912 int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
119 157912 int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
120 157912 int new_index = 0;
121
122
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157912 if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
123 130726 qadd= 0;
124 130726 qmul= 1<<QEXPSHIFT;
125 }
126
127 /* If we are on the second or later slice, restore our index. */
128
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157912 if (start_y != 0)
129 135784 new_index = save_state[0];
130
131
132
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533912 for(y=start_y; y<h; y++){
133 376000 int x = 0;
134 int v;
135
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376000 IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
136 376000 memset(line, 0, b->width*sizeof(IDWTELEM));
137 376000 v = b->x_coeff[new_index].coeff;
138 376000 x = b->x_coeff[new_index++].x;
139
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16873440 while(x < w){
140 16497440 register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT;
141 16497440 register int u= -(v&1);
142 16497440 line[x] = (t^u) - u;
143
144 16497440 v = b->x_coeff[new_index].coeff;
145 16497440 x = b->x_coeff[new_index++].x;
146 }
147 }
148
149 /* Save our variables for the next slice. */
150 157912 save_state[0] = new_index;
151
152 157912 return;
153 }
154
155 250860 static int decode_q_branch(SnowContext *s, int level, int x, int y){
156 250860 const int w= s->b_width << s->block_max_depth;
157 250860 const int rem_depth= s->block_max_depth - level;
158 250860 const int index= (x + y*w) << rem_depth;
159 250860 int trx= (x+1)<<rem_depth;
160
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250860 const BlockNode *left = x ? &s->block[index-1] : &null_block;
161
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250860 const BlockNode *top = y ? &s->block[index-w] : &null_block;
162
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250860 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
163
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250860 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt
164 250860 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
165 int res;
166
167
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250860 if(s->keyframe){
168 8708 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);
169 8708 return 0;
170 }
171
172
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439291 if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
173 int type, mx, my;
174 197139 int l = left->color[0];
175 197139 int cb= left->color[1];
176 197139 int cr= left->color[2];
177 197139 unsigned ref = 0;
178 197139 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
179 197139 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
180 197139 int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
181
182 197139 type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
183
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197139 if(type){
184 int ld, cbd, crd;
185 44 pred_mv(s, &mx, &my, 0, left, top, tr);
186 44 ld = get_symbol(&s->c, &s->block_state[32], 1);
187
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44 if (ld < -255 || ld > 255) {
188 return AVERROR_INVALIDDATA;
189 }
190 44 l += ld;
191
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44 if (s->nb_planes > 2) {
192 44 cbd = get_symbol(&s->c, &s->block_state[64], 1);
193 44 crd = get_symbol(&s->c, &s->block_state[96], 1);
194
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44 if (cbd < -255 || cbd > 255 || crd < -255 || crd > 255) {
195 return AVERROR_INVALIDDATA;
196 }
197 44 cb += cbd;
198 44 cr += crd;
199 }
200 }else{
201
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197095 if(s->ref_frames > 1)
202 ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
203
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197095 if (ref >= s->ref_frames) {
204 av_log(s->avctx, AV_LOG_ERROR, "Invalid ref\n");
205 return AVERROR_INVALIDDATA;
206 }
207 197095 pred_mv(s, &mx, &my, ref, left, top, tr);
208
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197095 mx+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
209
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197095 my+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
210 }
211 197139 set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
212 }else{
213
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90026 if ((res = decode_q_branch(s, level+1, 2*x+0, 2*y+0)) < 0 ||
214
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90026 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+0)) < 0 ||
215
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90026 (res = decode_q_branch(s, level+1, 2*x+0, 2*y+1)) < 0 ||
216 45013 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+1)) < 0)
217 return res;
218 }
219 242152 return 0;
220 }
221
222 1537 static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
223 1537 const int w= b->width;
224 1537 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
225 1537 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
226 1537 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
227 int x,y;
228
229
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1537 if(s->qlog == LOSSLESS_QLOG) return;
230
231
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2149 for(y=start_y; y<end_y; y++){
232 // DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
233
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1228 IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
234
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4912 for(x=0; x<w; x++){
235 3684 int i= line[x];
236
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3684 if(i<0){
237 1591 line[x]= -((-i*(unsigned)qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
238
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2093 }else if(i>0){
239 974 line[x]= (( i*(unsigned)qmul + qadd)>>(QEXPSHIFT));
240 }
241 }
242 }
243 }
244
245 1537 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){
246 1537 const int w= b->width;
247 int x,y;
248
249 1537 IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
250 IDWTELEM * prev;
251
252
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1537 if (start_y != 0)
253
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154 line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
254
255
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5691 for(y=start_y; y<end_y; y++){
256 4154 prev = line;
257 // line = slice_buffer_get_line_from_address(sb, src + (y * stride));
258
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4154 line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
259
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32324 for(x=0; x<w; x++){
260
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28170 if(x){
261
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24016 if(use_median){
262 if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
263 else line[x] += line[x - 1];
264 }else{
265
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24016 if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
266 4615 else line[x] += line[x - 1];
267 }
268 }else{
269
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4154 if(y) line[x] += prev[x];
270 }
271 }
272 }
273 1537 }
274
275 56 static void decode_qlogs(SnowContext *s){
276 int plane_index, level, orientation;
277
278
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224 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
279
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1008 for(level=0; level<s->spatial_decomposition_count; level++){
280
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3528 for(orientation=level ? 1:0; orientation<4; orientation++){
281 int q;
282
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2688 if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
283
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1792 else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
284 1232 else q= get_symbol(&s->c, s->header_state, 1);
285 2688 s->plane[plane_index].band[level][orientation].qlog= q;
286 }
287 }
288 }
289 56 }
290
291 #define GET_S(dst, check) \
292 tmp= get_symbol(&s->c, s->header_state, 0);\
293 if(!(check)){\
294 av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
295 return AVERROR_INVALIDDATA;\
296 }\
297 dst= tmp;
298
299 461 static int decode_header(SnowContext *s){
300 int plane_index, tmp;
301 uint8_t kstate[32];
302
303 461 memset(kstate, MID_STATE, sizeof(kstate));
304
305 461 s->keyframe= get_rac(&s->c, kstate);
306
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461 if(s->keyframe || s->always_reset){
307 56 ff_snow_reset_contexts(s);
308 56 s->spatial_decomposition_type=
309 56 s->qlog=
310 56 s->qbias=
311 56 s->mv_scale=
312 56 s->block_max_depth= 0;
313 }
314
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461 if(s->keyframe){
315
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56 GET_S(s->version, tmp <= 0U)
316 56 s->always_reset= get_rac(&s->c, s->header_state);
317 56 s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
318 56 s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
319
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56 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
320 56 s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
321
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56 if (s->colorspace_type == 1) {
322 s->avctx->pix_fmt= AV_PIX_FMT_GRAY8;
323 s->nb_planes = 1;
324
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56 } else if(s->colorspace_type == 0) {
325 56 s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
326 56 s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
327
328
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56 if(s->chroma_h_shift == 1 && s->chroma_v_shift==1){
329 56 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
330 }else if(s->chroma_h_shift == 0 && s->chroma_v_shift==0){
331 s->avctx->pix_fmt= AV_PIX_FMT_YUV444P;
332 }else if(s->chroma_h_shift == 2 && s->chroma_v_shift==2){
333 s->avctx->pix_fmt= AV_PIX_FMT_YUV410P;
334 } else {
335 av_log(s, AV_LOG_ERROR, "unsupported color subsample mode %d %d\n", s->chroma_h_shift, s->chroma_v_shift);
336 s->chroma_h_shift = s->chroma_v_shift = 1;
337 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
338 return AVERROR_INVALIDDATA;
339 }
340 56 s->nb_planes = 3;
341 } else {
342 av_log(s, AV_LOG_ERROR, "unsupported color space\n");
343 s->chroma_h_shift = s->chroma_v_shift = 1;
344 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
345 return AVERROR_INVALIDDATA;
346 }
347
348
349 56 s->spatial_scalability= get_rac(&s->c, s->header_state);
350 // s->rate_scalability= get_rac(&s->c, s->header_state);
351
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56 GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
352 56 s->max_ref_frames++;
353
354 56 decode_qlogs(s);
355 }
356
357
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461 if(!s->keyframe){
358
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405 if(get_rac(&s->c, s->header_state)){
359
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135 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
360 90 int htaps, i, sum=0;
361 90 Plane *p= &s->plane[plane_index];
362 90 p->diag_mc= get_rac(&s->c, s->header_state);
363 90 htaps= get_symbol(&s->c, s->header_state, 0);
364
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90 if((unsigned)htaps >= HTAPS_MAX/2 - 1)
365 return AVERROR_INVALIDDATA;
366 90 htaps = htaps*2 + 2;
367 90 p->htaps= htaps;
368
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360 for(i= htaps/2; i; i--){
369 270 unsigned hcoeff = get_symbol(&s->c, s->header_state, 0);
370
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270 if (hcoeff > 127)
371 return AVERROR_INVALIDDATA;
372 270 p->hcoeff[i]= hcoeff * (1-2*(i&1));
373 270 sum += p->hcoeff[i];
374 }
375 90 p->hcoeff[0]= 32-sum;
376 }
377 45 s->plane[2].diag_mc= s->plane[1].diag_mc;
378 45 s->plane[2].htaps = s->plane[1].htaps;
379 45 memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
380 }
381
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405 if(get_rac(&s->c, s->header_state)){
382 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
383 decode_qlogs(s);
384 }
385 }
386
387 461 s->spatial_decomposition_type+= (unsigned)get_symbol(&s->c, s->header_state, 1);
388
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461 if(s->spatial_decomposition_type > 1U){
389 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported\n", s->spatial_decomposition_type);
390 return AVERROR_INVALIDDATA;
391 }
392 461 if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
393
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461 s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){
394 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);
395 return AVERROR_INVALIDDATA;
396 }
397
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461 if (s->avctx->width > 65536-4) {
398 av_log(s->avctx, AV_LOG_ERROR, "Width %d is too large\n", s->avctx->width);
399 return AVERROR_INVALIDDATA;
400 }
401
402
403 461 s->qlog += (unsigned)get_symbol(&s->c, s->header_state, 1);
404 461 s->mv_scale += (unsigned)get_symbol(&s->c, s->header_state, 1);
405 461 s->qbias += (unsigned)get_symbol(&s->c, s->header_state, 1);
406 461 s->block_max_depth+= (unsigned)get_symbol(&s->c, s->header_state, 1);
407
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461 if(s->block_max_depth > 1 || s->block_max_depth < 0 || s->mv_scale > 256U){
408 av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);
409 s->block_max_depth= 0;
410 s->mv_scale = 0;
411 return AVERROR_INVALIDDATA;
412 }
413
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461 if (FFABS(s->qbias) > 127) {
414 av_log(s->avctx, AV_LOG_ERROR, "qbias %d is too large\n", s->qbias);
415 s->qbias = 0;
416 return AVERROR_INVALIDDATA;
417 }
418
419 461 return 0;
420 }
421
422 461 static int decode_blocks(SnowContext *s){
423 int x, y;
424 461 int w= s->b_width;
425 461 int h= s->b_height;
426 int res;
427
428
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4461 for(y=0; y<h; y++){
429
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74808 for(x=0; x<w; x++){
430
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70808 if (s->c.bytestream >= s->c.bytestream_end)
431 return AVERROR_INVALIDDATA;
432
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70808 if ((res = decode_q_branch(s, 0, x, y)) < 0)
433 return res;
434 }
435 }
436 461 return 0;
437 }
438
439 461 static int decode_frame(AVCodecContext *avctx, AVFrame *picture,
440 int *got_frame, AVPacket *avpkt)
441 {
442 461 const uint8_t *buf = avpkt->data;
443 461 int buf_size = avpkt->size;
444 461 SnowContext *s = avctx->priv_data;
445 461 RangeCoder * const c= &s->c;
446 int bytes_read;
447 int level, orientation, plane_index;
448 int res;
449
450 461 ff_init_range_decoder(c, buf, buf_size);
451 461 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
452
453 461 s->current_picture->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
454
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461 if ((res = decode_header(s)) < 0)
455 return res;
456
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461 if ((res=ff_snow_common_init_after_header(avctx)) < 0)
457 return res;
458
459 // realloc slice buffer for the case that spatial_decomposition_count changed
460 461 ff_slice_buffer_destroy(&s->sb);
461
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461 if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,
462 461 (MB_SIZE >> s->block_max_depth) +
463 461 s->spatial_decomposition_count * 11 + 1,
464 s->plane[0].width,
465 s->spatial_idwt_buffer)) < 0)
466 return res;
467
468
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1844 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
469 1383 Plane *p= &s->plane[plane_index];
470
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2706 p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
471
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1323 && p->hcoeff[1]==-10
472
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2706 && p->hcoeff[2]==2;
473 }
474
475 461 ff_snow_alloc_blocks(s);
476
477
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461 if((res = ff_snow_frame_start(s)) < 0)
478 return res;
479
480
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461 s->current_picture->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
481
482 //keyframe flag duplication mess FIXME
483
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461 if(avctx->debug&FF_DEBUG_PICT_INFO)
484 av_log(avctx, AV_LOG_ERROR,
485 "keyframe:%d qlog:%d qbias: %d mvscale: %d "
486 "decomposition_type:%d decomposition_count:%d\n",
487 s->keyframe, s->qlog, s->qbias, s->mv_scale,
488 s->spatial_decomposition_type,
489 s->spatial_decomposition_count
490 );
491
492
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461 if (s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_MVS) {
493 size_t size;
494 res = av_size_mult(s->b_width * s->b_height, sizeof(AVMotionVector) << (s->block_max_depth*2), &size);
495 if (res)
496 return res;
497 av_fast_malloc(&s->avmv, &s->avmv_size, size);
498 if (!s->avmv)
499 return AVERROR(ENOMEM);
500 } else {
501 461 s->avmv_size = 0;
502 461 av_freep(&s->avmv);
503 }
504 461 s->avmv_index = 0;
505
506
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461 if ((res = decode_blocks(s)) < 0)
507 return res;
508
509
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1844 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
510 1383 Plane *p= &s->plane[plane_index];
511 1383 int w= p->width;
512 1383 int h= p->height;
513 int x, y;
514 int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
515
516
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1383 if(s->avctx->debug&2048){
517 memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
518 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
519
520 for(y=0; y<h; y++){
521 for(x=0; x<w; x++){
522 int v= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x];
523 s->mconly_picture->data[plane_index][y*s->mconly_picture->linesize[plane_index] + x]= v;
524 }
525 }
526 }
527
528
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8298 for(level=0; level<s->spatial_decomposition_count; level++){
529
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29043 for(orientation=level ? 1 : 0; orientation<4; orientation++){
530 22128 SubBand *b= &p->band[level][orientation];
531 22128 unpack_coeffs(s, b, b->parent, orientation);
532 }
533 }
534
535 {
536 1383 const int mb_h= s->b_height << s->block_max_depth;
537 1383 const int block_size = MB_SIZE >> s->block_max_depth;
538
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1383 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
539 int mb_y;
540 DWTCompose cs[MAX_DECOMPOSITIONS];
541 1383 int yd=0, yq=0;
542 int y;
543 int end_y;
544
545 1383 ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
546
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23082 for(mb_y=0; mb_y<=mb_h; mb_y++){
547
548 21699 int slice_starty = block_h*mb_y;
549 21699 int slice_h = block_h*(mb_y+1);
550
551
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21699 if (!(s->keyframe || s->avctx->debug&512)){
552 19035 slice_starty = FFMAX(0, slice_starty - (block_h >> 1));
553 19035 slice_h -= (block_h >> 1);
554 }
555
556
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130194 for(level=0; level<s->spatial_decomposition_count; level++){
557
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455679 for(orientation=level ? 1 : 0; orientation<4; orientation++){
558 347184 SubBand *b= &p->band[level][orientation];
559 int start_y;
560 int end_y;
561 347184 int our_mb_start = mb_y;
562 347184 int our_mb_end = (mb_y + 1);
563 347184 const int extra= 3;
564
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347184 start_y = (mb_y ? ((block_h * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);
565 347184 end_y = (((block_h * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
566
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347184 if (!(s->keyframe || s->avctx->debug&512)){
567 304560 start_y = FFMAX(0, start_y - (block_h >> (1+s->spatial_decomposition_count - level)));
568 304560 end_y = FFMAX(0, end_y - (block_h >> (1+s->spatial_decomposition_count - level)));
569 }
570 347184 start_y = FFMIN(b->height, start_y);
571 347184 end_y = FFMIN(b->height, end_y);
572
573
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347184 if (start_y != end_y){
574
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157912 if (orientation == 0){
575 1537 SubBand * correlate_band = &p->band[0][0];
576 1537 int correlate_end_y = FFMIN(b->height, end_y + 1);
577
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1537 int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
578 1537 decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
579 1537 correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
580 1537 dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
581 }
582 else
583 156375 decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
584 }
585 }
586 }
587
588
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55556 for(; yd<slice_h; yd+=4){
589 33857 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);
590 }
591
592
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21699 if(s->qlog == LOSSLESS_QLOG){
593
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105798 for(; yq<slice_h && yq<h; yq++){
594
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88704 IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
595
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23506560 for(x=0; x<w; x++){
596 23417856 line[x] *= 1<<FRAC_BITS;
597 }
598 }
599 }
600
601 21699 predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
602
603 21699 y = FFMIN(p->height, slice_starty);
604 21699 end_y = FFMIN(p->height, slice_h);
605
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149699 while(y < end_y)
606 128000 ff_slice_buffer_release(&s->sb, y++);
607 }
608
609 1383 ff_slice_buffer_flush(&s->sb);
610 }
611
612 }
613
614 461 emms_c();
615
616 461 ff_snow_release_buffer(avctx);
617
618
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461 if(!(s->avctx->debug&2048))
619 461 res = av_frame_ref(picture, s->current_picture);
620 else
621 res = av_frame_ref(picture, s->mconly_picture);
622
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461 if (res >= 0 && s->avmv_index) {
623 AVFrameSideData *sd;
624
625 sd = av_frame_new_side_data(picture, AV_FRAME_DATA_MOTION_VECTORS, s->avmv_index * sizeof(AVMotionVector));
626 if (!sd)
627 return AVERROR(ENOMEM);
628 memcpy(sd->data, s->avmv, s->avmv_index * sizeof(AVMotionVector));
629 }
630
631
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461 if (res < 0)
632 return res;
633
634 461 *got_frame = 1;
635
636 461 bytes_read= c->bytestream - c->bytestream_start;
637
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461 if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
638
639 461 return bytes_read;
640 }
641
642 20 static av_cold int decode_end(AVCodecContext *avctx)
643 {
644 20 SnowContext *s = avctx->priv_data;
645
646 20 ff_slice_buffer_destroy(&s->sb);
647
648 20 ff_snow_common_end(s);
649
650 20 s->avmv_size = 0;
651 20 av_freep(&s->avmv);
652
653 20 return 0;
654 }
655
656 const FFCodec ff_snow_decoder = {
657 .p.name = "snow",
658 .p.long_name = NULL_IF_CONFIG_SMALL("Snow"),
659 .p.type = AVMEDIA_TYPE_VIDEO,
660 .p.id = AV_CODEC_ID_SNOW,
661 .priv_data_size = sizeof(SnowContext),
662 .init = ff_snow_common_init,
663 .close = decode_end,
664 FF_CODEC_DECODE_CB(decode_frame),
665 .p.capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
666 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
667 FF_CODEC_CAP_INIT_CLEANUP,
668 };
669