FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/snowdec.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 306 394 77.7%
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 "snow_dwt.h"
26 #include "internal.h"
27 #include "snow.h"
28
29 #include "rangecoder.h"
30 #include "mathops.h"
31
32 #include "h263.h"
33
34 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){
35 21699 Plane *p= &s->plane[plane_index];
36 21699 const int mb_w= s->b_width << s->block_max_depth;
37 21699 const int mb_h= s->b_height << s->block_max_depth;
38 int x, y, mb_x;
39 21699 int block_size = MB_SIZE >> s->block_max_depth;
40
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21699 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;
41
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21699 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
42
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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];
43
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21699 int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;
44 21699 int ref_stride= s->current_picture->linesize[plane_index];
45 21699 uint8_t *dst8= s->current_picture->data[plane_index];
46 21699 int w= p->width;
47 21699 int h= p->height;
48
49
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21699 if(s->keyframe || (s->avctx->debug&512)){
50
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2664 if(mb_y==mb_h)
51 168 return;
52
53
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2496 if(add){
54
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18176 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
55 // DWTELEM * line = slice_buffer_get_line(sb, y);
56 15680 IDWTELEM * line = sb->line[y];
57
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3359552 for(x=0; x<w; x++){
58 // int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
59 3343872 int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));
60 3343872 v >>= FRAC_BITS;
61
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3343872 if(v&(~255)) v= ~(v>>31);
62 3343872 dst8[x + y*ref_stride]= v;
63 }
64 }
65 }else{
66 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){
67 // DWTELEM * line = slice_buffer_get_line(sb, y);
68 IDWTELEM * line = sb->line[y];
69 for(x=0; x<w; x++){
70 line[x] -= 128 << FRAC_BITS;
71 // buf[x + y*w]-= 128<<FRAC_BITS;
72 }
73 }
74 }
75
76 2496 return;
77 }
78
79
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729810 for(mb_x=0; mb_x<=mb_w; mb_x++){
80 710775 add_yblock(s, 1, sb, old_buffer, dst8, obmc,
81 710775 block_w*mb_x - block_w/2,
82 710775 block_h*mb_y - block_h/2,
83 block_w, block_h,
84 w, h,
85 w, ref_stride, obmc_stride,
86 mb_x - 1, mb_y - 1,
87 add, 0, plane_index);
88 }
89
90
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19035 if(s->avmv && mb_y < mb_h && plane_index == 0)
91 for(mb_x=0; mb_x<mb_w; mb_x++){
92 AVMotionVector *avmv = s->avmv + s->avmv_index;
93 const int b_width = s->b_width << s->block_max_depth;
94 const int b_stride= b_width;
95 BlockNode *bn= &s->block[mb_x + mb_y*b_stride];
96
97 if (bn->type)
98 continue;
99
100 s->avmv_index++;
101
102 avmv->w = block_w;
103 avmv->h = block_h;
104 avmv->dst_x = block_w*mb_x - block_w/2;
105 avmv->dst_y = block_h*mb_y - block_h/2;
106 avmv->motion_scale = 8;
107 avmv->motion_x = bn->mx * s->mv_scale;
108 avmv->motion_y = bn->my * s->mv_scale;
109 avmv->src_x = avmv->dst_x + avmv->motion_x / 8;
110 avmv->src_y = avmv->dst_y + avmv->motion_y / 8;
111 avmv->source= -1 - bn->ref;
112 avmv->flags = 0;
113 }
114 }
115
116 157912 static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
117 157912 const int w= b->width;
118 int y;
119 157912 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
120 157912 int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
121 157912 int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
122 157912 int new_index = 0;
123
124
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157912 if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){
125 130726 qadd= 0;
126 130726 qmul= 1<<QEXPSHIFT;
127 }
128
129 /* If we are on the second or later slice, restore our index. */
130
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157912 if (start_y != 0)
131 135784 new_index = save_state[0];
132
133
134
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533912 for(y=start_y; y<h; y++){
135 376000 int x = 0;
136 int v;
137
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376000 IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;
138 376000 memset(line, 0, b->width*sizeof(IDWTELEM));
139 376000 v = b->x_coeff[new_index].coeff;
140 376000 x = b->x_coeff[new_index++].x;
141
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16873440 while(x < w){
142 16497440 register int t= (int)( (v>>1)*(unsigned)qmul + qadd)>>QEXPSHIFT;
143 16497440 register int u= -(v&1);
144 16497440 line[x] = (t^u) - u;
145
146 16497440 v = b->x_coeff[new_index].coeff;
147 16497440 x = b->x_coeff[new_index++].x;
148 }
149 }
150
151 /* Save our variables for the next slice. */
152 157912 save_state[0] = new_index;
153
154 157912 return;
155 }
156
157 250860 static int decode_q_branch(SnowContext *s, int level, int x, int y){
158 250860 const int w= s->b_width << s->block_max_depth;
159 250860 const int rem_depth= s->block_max_depth - level;
160 250860 const int index= (x + y*w) << rem_depth;
161 250860 int trx= (x+1)<<rem_depth;
162
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250860 const BlockNode *left = x ? &s->block[index-1] : &null_block;
163
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250860 const BlockNode *top = y ? &s->block[index-w] : &null_block;
164
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250860 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;
165
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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
166 250860 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;
167 int res;
168
169
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250860 if(s->keyframe){
170 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);
171 8708 return 0;
172 }
173
174
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439291 if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){
175 int type, mx, my;
176 197139 int l = left->color[0];
177 197139 int cb= left->color[1];
178 197139 int cr= left->color[2];
179 197139 unsigned ref = 0;
180 197139 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);
181 197139 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));
182 197139 int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));
183
184 197139 type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;
185
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197139 if(type){
186 int ld, cbd, crd;
187 44 pred_mv(s, &mx, &my, 0, left, top, tr);
188 44 ld = get_symbol(&s->c, &s->block_state[32], 1);
189
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44 if (ld < -255 || ld > 255) {
190 return AVERROR_INVALIDDATA;
191 }
192 44 l += ld;
193
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44 if (s->nb_planes > 2) {
194 44 cbd = get_symbol(&s->c, &s->block_state[64], 1);
195 44 crd = get_symbol(&s->c, &s->block_state[96], 1);
196
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44 if (cbd < -255 || cbd > 255 || crd < -255 || crd > 255) {
197 return AVERROR_INVALIDDATA;
198 }
199 44 cb += cbd;
200 44 cr += crd;
201 }
202 }else{
203
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197095 if(s->ref_frames > 1)
204 ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);
205
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197095 if (ref >= s->ref_frames) {
206 av_log(s->avctx, AV_LOG_ERROR, "Invalid ref\n");
207 return AVERROR_INVALIDDATA;
208 }
209 197095 pred_mv(s, &mx, &my, ref, left, top, tr);
210
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197095 mx+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);
211
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197095 my+= (unsigned)get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);
212 }
213 197139 set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);
214 }else{
215
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90026 if ((res = decode_q_branch(s, level+1, 2*x+0, 2*y+0)) < 0 ||
216
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90026 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+0)) < 0 ||
217
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90026 (res = decode_q_branch(s, level+1, 2*x+0, 2*y+1)) < 0 ||
218 45013 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+1)) < 0)
219 return res;
220 }
221 242152 return 0;
222 }
223
224 1537 static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){
225 1537 const int w= b->width;
226 1537 const int qlog= av_clip(s->qlog + (int64_t)b->qlog, 0, QROOT*16);
227 1537 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
228 1537 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
229 int x,y;
230
231
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1537 if(s->qlog == LOSSLESS_QLOG) return;
232
233
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2149 for(y=start_y; y<end_y; y++){
234 // DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));
235
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1228 IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
236
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4912 for(x=0; x<w; x++){
237 3684 int i= line[x];
238
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3684 if(i<0){
239 1591 line[x]= -((-i*(unsigned)qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias
240
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2093 }else if(i>0){
241 974 line[x]= (( i*(unsigned)qmul + qadd)>>(QEXPSHIFT));
242 }
243 }
244 }
245 }
246
247 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){
248 1537 const int w= b->width;
249 int x,y;
250
251 1537 IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning
252 IDWTELEM * prev;
253
254
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1537 if (start_y != 0)
255
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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;
256
257
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5691 for(y=start_y; y<end_y; y++){
258 4154 prev = line;
259 // line = slice_buffer_get_line_from_address(sb, src + (y * stride));
260
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4154 line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;
261
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32324 for(x=0; x<w; x++){
262
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28170 if(x){
263
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24016 if(use_median){
264 if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);
265 else line[x] += line[x - 1];
266 }else{
267
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24016 if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);
268 4615 else line[x] += line[x - 1];
269 }
270 }else{
271
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4154 if(y) line[x] += prev[x];
272 }
273 }
274 }
275 1537 }
276
277 56 static void decode_qlogs(SnowContext *s){
278 int plane_index, level, orientation;
279
280
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224 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
281
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1008 for(level=0; level<s->spatial_decomposition_count; level++){
282
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3528 for(orientation=level ? 1:0; orientation<4; orientation++){
283 int q;
284
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2688 if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;
285
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1792 else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;
286 1232 else q= get_symbol(&s->c, s->header_state, 1);
287 2688 s->plane[plane_index].band[level][orientation].qlog= q;
288 }
289 }
290 }
291 56 }
292
293 #define GET_S(dst, check) \
294 tmp= get_symbol(&s->c, s->header_state, 0);\
295 if(!(check)){\
296 av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\
297 return AVERROR_INVALIDDATA;\
298 }\
299 dst= tmp;
300
301 461 static int decode_header(SnowContext *s){
302 int plane_index, tmp;
303 uint8_t kstate[32];
304
305 461 memset(kstate, MID_STATE, sizeof(kstate));
306
307 461 s->keyframe= get_rac(&s->c, kstate);
308
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461 if(s->keyframe || s->always_reset){
309 56 ff_snow_reset_contexts(s);
310 56 s->spatial_decomposition_type=
311 56 s->qlog=
312 56 s->qbias=
313 56 s->mv_scale=
314 56 s->block_max_depth= 0;
315 }
316
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461 if(s->keyframe){
317
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56 GET_S(s->version, tmp <= 0U)
318 56 s->always_reset= get_rac(&s->c, s->header_state);
319 56 s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);
320 56 s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);
321
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56 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
322 56 s->colorspace_type= get_symbol(&s->c, s->header_state, 0);
323
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56 if (s->colorspace_type == 1) {
324 s->avctx->pix_fmt= AV_PIX_FMT_GRAY8;
325 s->nb_planes = 1;
326
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56 } else if(s->colorspace_type == 0) {
327 56 s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);
328 56 s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);
329
330
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56 if(s->chroma_h_shift == 1 && s->chroma_v_shift==1){
331 56 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
332 }else if(s->chroma_h_shift == 0 && s->chroma_v_shift==0){
333 s->avctx->pix_fmt= AV_PIX_FMT_YUV444P;
334 }else if(s->chroma_h_shift == 2 && s->chroma_v_shift==2){
335 s->avctx->pix_fmt= AV_PIX_FMT_YUV410P;
336 } else {
337 av_log(s, AV_LOG_ERROR, "unsupported color subsample mode %d %d\n", s->chroma_h_shift, s->chroma_v_shift);
338 s->chroma_h_shift = s->chroma_v_shift = 1;
339 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
340 return AVERROR_INVALIDDATA;
341 }
342 56 s->nb_planes = 3;
343 } else {
344 av_log(s, AV_LOG_ERROR, "unsupported color space\n");
345 s->chroma_h_shift = s->chroma_v_shift = 1;
346 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;
347 return AVERROR_INVALIDDATA;
348 }
349
350
351 56 s->spatial_scalability= get_rac(&s->c, s->header_state);
352 // s->rate_scalability= get_rac(&s->c, s->header_state);
353
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56 GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)
354 56 s->max_ref_frames++;
355
356 56 decode_qlogs(s);
357 }
358
359
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461 if(!s->keyframe){
360
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405 if(get_rac(&s->c, s->header_state)){
361
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135 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){
362 90 int htaps, i, sum=0;
363 90 Plane *p= &s->plane[plane_index];
364 90 p->diag_mc= get_rac(&s->c, s->header_state);
365 90 htaps= get_symbol(&s->c, s->header_state, 0);
366
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90 if((unsigned)htaps >= HTAPS_MAX/2 - 1)
367 return AVERROR_INVALIDDATA;
368 90 htaps = htaps*2 + 2;
369 90 p->htaps= htaps;
370
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360 for(i= htaps/2; i; i--){
371 270 unsigned hcoeff = get_symbol(&s->c, s->header_state, 0);
372
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270 if (hcoeff > 127)
373 return AVERROR_INVALIDDATA;
374 270 p->hcoeff[i]= hcoeff * (1-2*(i&1));
375 270 sum += p->hcoeff[i];
376 }
377 90 p->hcoeff[0]= 32-sum;
378 }
379 45 s->plane[2].diag_mc= s->plane[1].diag_mc;
380 45 s->plane[2].htaps = s->plane[1].htaps;
381 45 memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));
382 }
383
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405 if(get_rac(&s->c, s->header_state)){
384 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)
385 decode_qlogs(s);
386 }
387 }
388
389 461 s->spatial_decomposition_type+= (unsigned)get_symbol(&s->c, s->header_state, 1);
390
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461 if(s->spatial_decomposition_type > 1U){
391 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported\n", s->spatial_decomposition_type);
392 return AVERROR_INVALIDDATA;
393 }
394 461 if(FFMIN(s->avctx-> width>>s->chroma_h_shift,
395
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461 s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){
396 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);
397 return AVERROR_INVALIDDATA;
398 }
399
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461 if (s->avctx->width > 65536-4) {
400 av_log(s->avctx, AV_LOG_ERROR, "Width %d is too large\n", s->avctx->width);
401 return AVERROR_INVALIDDATA;
402 }
403
404
405 461 s->qlog += (unsigned)get_symbol(&s->c, s->header_state, 1);
406 461 s->mv_scale += (unsigned)get_symbol(&s->c, s->header_state, 1);
407 461 s->qbias += (unsigned)get_symbol(&s->c, s->header_state, 1);
408 461 s->block_max_depth+= (unsigned)get_symbol(&s->c, s->header_state, 1);
409
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461 if(s->block_max_depth > 1 || s->block_max_depth < 0 || s->mv_scale > 256U){
410 av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);
411 s->block_max_depth= 0;
412 s->mv_scale = 0;
413 return AVERROR_INVALIDDATA;
414 }
415
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461 if (FFABS(s->qbias) > 127) {
416 av_log(s->avctx, AV_LOG_ERROR, "qbias %d is too large\n", s->qbias);
417 s->qbias = 0;
418 return AVERROR_INVALIDDATA;
419 }
420
421 461 return 0;
422 }
423
424 461 static int decode_blocks(SnowContext *s){
425 int x, y;
426 461 int w= s->b_width;
427 461 int h= s->b_height;
428 int res;
429
430
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4461 for(y=0; y<h; y++){
431
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74808 for(x=0; x<w; x++){
432
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70808 if (s->c.bytestream >= s->c.bytestream_end)
433 return AVERROR_INVALIDDATA;
434
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70808 if ((res = decode_q_branch(s, 0, x, y)) < 0)
435 return res;
436 }
437 }
438 461 return 0;
439 }
440
441 461 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
442 AVPacket *avpkt)
443 {
444 461 const uint8_t *buf = avpkt->data;
445 461 int buf_size = avpkt->size;
446 461 SnowContext *s = avctx->priv_data;
447 461 RangeCoder * const c= &s->c;
448 int bytes_read;
449 461 AVFrame *picture = data;
450 int level, orientation, plane_index;
451 int res;
452
453 461 ff_init_range_decoder(c, buf, buf_size);
454 461 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
455
456 461 s->current_picture->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P
457
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461 if ((res = decode_header(s)) < 0)
458 return res;
459
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461 if ((res=ff_snow_common_init_after_header(avctx)) < 0)
460 return res;
461
462 // realloc slice buffer for the case that spatial_decomposition_count changed
463 461 ff_slice_buffer_destroy(&s->sb);
464
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461 if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,
465 461 (MB_SIZE >> s->block_max_depth) +
466 461 s->spatial_decomposition_count * 11 + 1,
467 s->plane[0].width,
468 s->spatial_idwt_buffer)) < 0)
469 return res;
470
471
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1844 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
472 1383 Plane *p= &s->plane[plane_index];
473
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2706 p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40
474
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1323 && p->hcoeff[1]==-10
475
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2706 && p->hcoeff[2]==2;
476 }
477
478 461 ff_snow_alloc_blocks(s);
479
480
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461 if((res = ff_snow_frame_start(s)) < 0)
481 return res;
482
483
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461 s->current_picture->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
484
485 //keyframe flag duplication mess FIXME
486
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461 if(avctx->debug&FF_DEBUG_PICT_INFO)
487 av_log(avctx, AV_LOG_ERROR,
488 "keyframe:%d qlog:%d qbias: %d mvscale: %d "
489 "decomposition_type:%d decomposition_count:%d\n",
490 s->keyframe, s->qlog, s->qbias, s->mv_scale,
491 s->spatial_decomposition_type,
492 s->spatial_decomposition_count
493 );
494
495
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461 if (s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_MVS) {
496 size_t size;
497 res = av_size_mult(s->b_width * s->b_height, sizeof(AVMotionVector) << (s->block_max_depth*2), &size);
498 if (res)
499 return res;
500 av_fast_malloc(&s->avmv, &s->avmv_size, size);
501 if (!s->avmv)
502 return AVERROR(ENOMEM);
503 } else {
504 461 s->avmv_size = 0;
505 461 av_freep(&s->avmv);
506 }
507 461 s->avmv_index = 0;
508
509
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461 if ((res = decode_blocks(s)) < 0)
510 return res;
511
512
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1844 for(plane_index=0; plane_index < s->nb_planes; plane_index++){
513 1383 Plane *p= &s->plane[plane_index];
514 1383 int w= p->width;
515 1383 int h= p->height;
516 int x, y;
517 int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */
518
519
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1383 if(s->avctx->debug&2048){
520 memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);
521 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);
522
523 for(y=0; y<h; y++){
524 for(x=0; x<w; x++){
525 int v= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x];
526 s->mconly_picture->data[plane_index][y*s->mconly_picture->linesize[plane_index] + x]= v;
527 }
528 }
529 }
530
531
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8298 for(level=0; level<s->spatial_decomposition_count; level++){
532
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29043 for(orientation=level ? 1 : 0; orientation<4; orientation++){
533 22128 SubBand *b= &p->band[level][orientation];
534 22128 unpack_coeffs(s, b, b->parent, orientation);
535 }
536 }
537
538 {
539 1383 const int mb_h= s->b_height << s->block_max_depth;
540 1383 const int block_size = MB_SIZE >> s->block_max_depth;
541
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1383 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;
542 int mb_y;
543 DWTCompose cs[MAX_DECOMPOSITIONS];
544 1383 int yd=0, yq=0;
545 int y;
546 int end_y;
547
548 1383 ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);
549
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23082 for(mb_y=0; mb_y<=mb_h; mb_y++){
550
551 21699 int slice_starty = block_h*mb_y;
552 21699 int slice_h = block_h*(mb_y+1);
553
554
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21699 if (!(s->keyframe || s->avctx->debug&512)){
555 19035 slice_starty = FFMAX(0, slice_starty - (block_h >> 1));
556 19035 slice_h -= (block_h >> 1);
557 }
558
559
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130194 for(level=0; level<s->spatial_decomposition_count; level++){
560
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455679 for(orientation=level ? 1 : 0; orientation<4; orientation++){
561 347184 SubBand *b= &p->band[level][orientation];
562 int start_y;
563 int end_y;
564 347184 int our_mb_start = mb_y;
565 347184 int our_mb_end = (mb_y + 1);
566 347184 const int extra= 3;
567
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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);
568 347184 end_y = (((block_h * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);
569
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347184 if (!(s->keyframe || s->avctx->debug&512)){
570 304560 start_y = FFMAX(0, start_y - (block_h >> (1+s->spatial_decomposition_count - level)));
571 304560 end_y = FFMAX(0, end_y - (block_h >> (1+s->spatial_decomposition_count - level)));
572 }
573 347184 start_y = FFMIN(b->height, start_y);
574 347184 end_y = FFMIN(b->height, end_y);
575
576
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347184 if (start_y != end_y){
577
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157912 if (orientation == 0){
578 1537 SubBand * correlate_band = &p->band[0][0];
579 1537 int correlate_end_y = FFMIN(b->height, end_y + 1);
580
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1537 int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));
581 1537 decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);
582 1537 correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);
583 1537 dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);
584 }
585 else
586 156375 decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);
587 }
588 }
589 }
590
591
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55556 for(; yd<slice_h; yd+=4){
592 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);
593 }
594
595
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21699 if(s->qlog == LOSSLESS_QLOG){
596
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105798 for(; yq<slice_h && yq<h; yq++){
597
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88704 IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);
598
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23506560 for(x=0; x<w; x++){
599 23417856 line[x] *= 1<<FRAC_BITS;
600 }
601 }
602 }
603
604 21699 predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);
605
606 21699 y = FFMIN(p->height, slice_starty);
607 21699 end_y = FFMIN(p->height, slice_h);
608
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149699 while(y < end_y)
609 128000 ff_slice_buffer_release(&s->sb, y++);
610 }
611
612 1383 ff_slice_buffer_flush(&s->sb);
613 }
614
615 }
616
617 461 emms_c();
618
619 461 ff_snow_release_buffer(avctx);
620
621
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461 if(!(s->avctx->debug&2048))
622 461 res = av_frame_ref(picture, s->current_picture);
623 else
624 res = av_frame_ref(picture, s->mconly_picture);
625
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461 if (res >= 0 && s->avmv_index) {
626 AVFrameSideData *sd;
627
628 sd = av_frame_new_side_data(picture, AV_FRAME_DATA_MOTION_VECTORS, s->avmv_index * sizeof(AVMotionVector));
629 if (!sd)
630 return AVERROR(ENOMEM);
631 memcpy(sd->data, s->avmv, s->avmv_index * sizeof(AVMotionVector));
632 }
633
634
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461 if (res < 0)
635 return res;
636
637 461 *got_frame = 1;
638
639 461 bytes_read= c->bytestream - c->bytestream_start;
640
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461 if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME
641
642 461 return bytes_read;
643 }
644
645 20 static av_cold int decode_end(AVCodecContext *avctx)
646 {
647 20 SnowContext *s = avctx->priv_data;
648
649 20 ff_slice_buffer_destroy(&s->sb);
650
651 20 ff_snow_common_end(s);
652
653 20 s->avmv_size = 0;
654 20 av_freep(&s->avmv);
655
656 20 return 0;
657 }
658
659 const AVCodec ff_snow_decoder = {
660 .name = "snow",
661 .long_name = NULL_IF_CONFIG_SMALL("Snow"),
662 .type = AVMEDIA_TYPE_VIDEO,
663 .id = AV_CODEC_ID_SNOW,
664 .priv_data_size = sizeof(SnowContext),
665 .init = ff_snow_common_init,
666 .close = decode_end,
667 .decode = decode_frame,
668 .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,
669 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
670 FF_CODEC_CAP_INIT_CLEANUP,
671 };
672