FFmpeg: libavcodec/snowdec.c Source File

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libavcodec

snowdec.c

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1 /*

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 */

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"

29 #include "rangecoder.h"

30 #include "mathops.h"

32 #include "mpegvideo.h"

33 #include "h263.h"

35 static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer * sb, IDWTELEM * old_buffer, int plane_index, int add, int mb_y){

36 Plane *p= &s->plane[plane_index];

37 const int mb_w= s->b_width << s->block_max_depth;

38 const int mb_h= s->b_height << s->block_max_depth;

39 int x, y, mb_x;

40 int block_size = MB_SIZE >> s->block_max_depth;

41 int block_w = plane_index ? block_size>>s->chroma_h_shift : block_size;

42 int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;

43 const uint8_t *obmc = plane_index ? ff_obmc_tab[s->block_max_depth+s->chroma_h_shift] : ff_obmc_tab[s->block_max_depth];

44 int obmc_stride= plane_index ? (2*block_size)>>s->chroma_h_shift : 2*block_size;

45 int ref_stride= s->current_picture->linesize[plane_index];

46 uint8_t *dst8= s->current_picture->data[plane_index];

47 int w= p->width;

48 int h= p->height;

50 if(s->keyframe || (s->avctx->debug&512)){

51 if(mb_y==mb_h)

52 return;

54 if(add){

55 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){

56 // DWTELEM * line = slice_buffer_get_line(sb, y);

57 IDWTELEM * line = sb->line[y];

58 for(x=0; x<w; x++){

59 // int v= buf[x + y*w] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));

60 int v= line[x] + (128<<FRAC_BITS) + (1<<(FRAC_BITS-1));

61 v >>= FRAC_BITS;

62 if(v&(~255)) v= ~(v>>31);

63 dst8[x + y*ref_stride]= v;

64 }

65 }

66 }else{

67 for(y=block_h*mb_y; y<FFMIN(h,block_h*(mb_y+1)); y++){

68 // DWTELEM * line = slice_buffer_get_line(sb, y);

69 IDWTELEM * line = sb->line[y];

70 for(x=0; x<w; x++){

71 line[x] -= 128 << FRAC_BITS;

72 // buf[x + y*w]-= 128<<FRAC_BITS;

73 }

74 }

75 }

77 return;

78 }

80 for(mb_x=0; mb_x<=mb_w; mb_x++){

81 add_yblock(s, 1, sb, old_buffer, dst8, obmc,

82 block_w*mb_x - block_w/2,

83 block_h*mb_y - block_h/2,

84 block_w, block_h,

85 w, h,

86 w, ref_stride, obmc_stride,

87 mb_x - 1, mb_y - 1,

88 add, 0, plane_index);

89 }

91 if(s->avmv && mb_y < mb_h && plane_index == 0)

92 for(mb_x=0; mb_x<mb_w; mb_x++){

93 AVMotionVector *avmv = s->avmv + s->avmv_index;

94 const int b_width = s->b_width << s->block_max_depth;

95 const int b_stride= b_width;

96 BlockNode *bn= &s->block[mb_x + mb_y*b_stride];

98 if (bn->type)

99 continue;

100

101 s->avmv_index++;

102

103 avmv->w = block_w;

104 avmv->h = block_h;

105 avmv->dst_x = block_w*mb_x - block_w/2;

106 avmv->dst_y = block_h*mb_y - block_h/2;

107 avmv->motion_scale = 8;

108 avmv->motion_x = bn->mx * s->mv_scale;

109 avmv->motion_y = bn->my * s->mv_scale;

110 avmv->src_x = avmv->dst_x + avmv->motion_x / 8;

111 avmv->src_y = avmv->dst_y + avmv->motion_y / 8;

112 avmv->source= -1 - bn->ref;

113 avmv->flags = 0;

114 }

115 }

116

117 static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){

118 const int w= b->width;

119 int y;

120 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);

121 int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);

122 int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;

123 int new_index = 0;

124

125 if(b->ibuf == s->spatial_idwt_buffer || s->qlog == LOSSLESS_QLOG){

126 qadd= 0;

127 qmul= 1<<QEXPSHIFT;

128 }

129

130 /* If we are on the second or later slice, restore our index. */

131 if (start_y != 0)

132 new_index = save_state[0];

133

134

135 for(y=start_y; y<h; y++){

136 int x = 0;

137 int v;

138 IDWTELEM * line = slice_buffer_get_line(sb, y * b->stride_line + b->buf_y_offset) + b->buf_x_offset;

139 memset(line, 0, b->width*sizeof(IDWTELEM));

140 v = b->x_coeff[new_index].coeff;

141 x = b->x_coeff[new_index++].x;

142 while(x < w){

143 register int t= ( (v>>1)*qmul + qadd)>>QEXPSHIFT;

144 register int u= -(v&1);

145 line[x] = (t^u) - u;

146

147 v = b->x_coeff[new_index].coeff;

148 x = b->x_coeff[new_index++].x;

149 }

150 }

151

152 /* Save our variables for the next slice. */

153 save_state[0] = new_index;

154

155 return;

156 }

157

158 static int decode_q_branch(SnowContext *s, int level, int x, int y){

159 const int w= s->b_width << s->block_max_depth;

160 const int rem_depth= s->block_max_depth - level;

161 const int index= (x + y*w) << rem_depth;

162 int trx= (x+1)<<rem_depth;

163 const BlockNode *left = x ? &s->block[index-1] : &null_block;

164 const BlockNode *top = y ? &s->block[index-w] : &null_block;

165 const BlockNode *tl = y && x ? &s->block[index-w-1] : left;

166 const BlockNode *tr = y && trx<w && ((x&1)==0 || level==0) ? &s->block[index-w+(1<<rem_depth)] : tl; //FIXME use lt

167 int s_context= 2*left->level + 2*top->level + tl->level + tr->level;

168 int res;

169

170 if(s->keyframe){

171 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);

172 return 0;

173 }

174

175 if(level==s->block_max_depth || get_rac(&s->c, &s->block_state[4 + s_context])){

176 int type, mx, my;

177 int l = left->color[0];

178 int cb= left->color[1];

179 int cr= left->color[2];

180 unsigned ref = 0;

181 int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref);

182 int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx));

183 int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my));

184

185 type= get_rac(&s->c, &s->block_state[1 + left->type + top->type]) ? BLOCK_INTRA : 0;

186

187 if(type){

188 pred_mv(s, &mx, &my, 0, left, top, tr);

189 l += get_symbol(&s->c, &s->block_state[32], 1);

190 if (s->nb_planes > 2) {

191 cb+= get_symbol(&s->c, &s->block_state[64], 1);

192 cr+= get_symbol(&s->c, &s->block_state[96], 1);

193 }

194 }else{

195 if(s->ref_frames > 1)

196 ref= get_symbol(&s->c, &s->block_state[128 + 1024 + 32*ref_context], 0);

197 if (ref >= s->ref_frames) {

198 av_log(s->avctx, AV_LOG_ERROR, "Invalid ref\n");

199 return AVERROR_INVALIDDATA;

200 }

201 pred_mv(s, &mx, &my, ref, left, top, tr);

202 mx+= get_symbol(&s->c, &s->block_state[128 + 32*(mx_context + 16*!!ref)], 1);

203 my+= get_symbol(&s->c, &s->block_state[128 + 32*(my_context + 16*!!ref)], 1);

204 }

205 set_blocks(s, level, x, y, l, cb, cr, mx, my, ref, type);

206 }else{

207 if ((res = decode_q_branch(s, level+1, 2*x+0, 2*y+0)) < 0 ||

208 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+0)) < 0 ||

209 (res = decode_q_branch(s, level+1, 2*x+0, 2*y+1)) < 0 ||

210 (res = decode_q_branch(s, level+1, 2*x+1, 2*y+1)) < 0)

211 return res;

212 }

213 return 0;

214 }

215

216 static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y){

217 const int w= b->width;

218 const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);

219 const int qmul= ff_qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);

220 const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;

221 int x,y;

222

223 if(s->qlog == LOSSLESS_QLOG) return;

224

225 for(y=start_y; y<end_y; y++){

226 // DWTELEM * line = slice_buffer_get_line_from_address(sb, src + (y * stride));

227 IDWTELEM * line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;

228 for(x=0; x<w; x++){

229 int i= line[x];

230 if(i<0){

231 line[x]= -((-i*qmul + qadd)>>(QEXPSHIFT)); //FIXME try different bias

232 }else if(i>0){

233 line[x]= (( i*qmul + qadd)>>(QEXPSHIFT));

234 }

235 }

236 }

237 }

238

239 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){

240 const int w= b->width;

241 int x,y;

242

243 IDWTELEM * line=0; // silence silly "could be used without having been initialized" warning

244 IDWTELEM * prev;

245

246 if (start_y != 0)

247 line = slice_buffer_get_line(sb, ((start_y - 1) * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;

248

249 for(y=start_y; y<end_y; y++){

250 prev = line;

251 // line = slice_buffer_get_line_from_address(sb, src + (y * stride));

252 line = slice_buffer_get_line(sb, (y * b->stride_line) + b->buf_y_offset) + b->buf_x_offset;

253 for(x=0; x<w; x++){

254 if(x){

255 if(use_median){

256 if(y && x+1<w) line[x] += mid_pred(line[x - 1], prev[x], prev[x + 1]);

257 else line[x] += line[x - 1];

258 }else{

259 if(y) line[x] += mid_pred(line[x - 1], prev[x], line[x - 1] + prev[x] - prev[x - 1]);

260 else line[x] += line[x - 1];

261 }

262 }else{

263 if(y) line[x] += prev[x];

264 }

265 }

266 }

267 }

268

269 static void decode_qlogs(SnowContext *s){

270 int plane_index, level, orientation;

271

272 for(plane_index=0; plane_index < s->nb_planes; plane_index++){

273 for(level=0; level<s->spatial_decomposition_count; level++){

274 for(orientation=level ? 1:0; orientation<4; orientation++){

275 int q;

276 if (plane_index==2) q= s->plane[1].band[level][orientation].qlog;

277 else if(orientation==2) q= s->plane[plane_index].band[level][1].qlog;

278 else q= get_symbol(&s->c, s->header_state, 1);

279 s->plane[plane_index].band[level][orientation].qlog= q;

280 }

281 }

282 }

283 }

284

285 #define GET_S(dst, check) \

286 tmp= get_symbol(&s->c, s->header_state, 0);\

287 if(!(check)){\

288 av_log(s->avctx, AV_LOG_ERROR, "Error " #dst " is %d\n", tmp);\

289 return AVERROR_INVALIDDATA;\

290 }\

291 dst= tmp;

292

293 static int decode_header(SnowContext *s){

294 int plane_index, tmp;

295 uint8_t kstate[32];

296

297 memset(kstate, MID_STATE, sizeof(kstate));

298

299 s->keyframe= get_rac(&s->c, kstate);

300 if(s->keyframe || s->always_reset){

301 ff_snow_reset_contexts(s);

302 s->spatial_decomposition_type=

303 s->qlog=

304 s->qbias=

305 s->mv_scale=

306 s->block_max_depth= 0;

307 }

308 if(s->keyframe){

309 GET_S(s->version, tmp <= 0U)

310 s->always_reset= get_rac(&s->c, s->header_state);

311 s->temporal_decomposition_type= get_symbol(&s->c, s->header_state, 0);

312 s->temporal_decomposition_count= get_symbol(&s->c, s->header_state, 0);

313 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)

314 s->colorspace_type= get_symbol(&s->c, s->header_state, 0);

315 if (s->colorspace_type == 1) {

316 s->avctx->pix_fmt= AV_PIX_FMT_GRAY8;

317 s->nb_planes = 1;

318 } else if(s->colorspace_type == 0) {

319 s->chroma_h_shift= get_symbol(&s->c, s->header_state, 0);

320 s->chroma_v_shift= get_symbol(&s->c, s->header_state, 0);

321

322 if(s->chroma_h_shift == 1 && s->chroma_v_shift==1){

323 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;

324 }else if(s->chroma_h_shift == 0 && s->chroma_v_shift==0){

325 s->avctx->pix_fmt= AV_PIX_FMT_YUV444P;

326 }else if(s->chroma_h_shift == 2 && s->chroma_v_shift==2){

327 s->avctx->pix_fmt= AV_PIX_FMT_YUV410P;

328 } else {

329 av_log(s, AV_LOG_ERROR, "unsupported color subsample mode %d %d\n", s->chroma_h_shift, s->chroma_v_shift);

330 s->chroma_h_shift = s->chroma_v_shift = 1;

331 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;

332 return AVERROR_INVALIDDATA;

333 }

334 s->nb_planes = 3;

335 } else {

336 av_log(s, AV_LOG_ERROR, "unsupported color space\n");

337 s->chroma_h_shift = s->chroma_v_shift = 1;

338 s->avctx->pix_fmt= AV_PIX_FMT_YUV420P;

339 return AVERROR_INVALIDDATA;

340 }

341

342

343 s->spatial_scalability= get_rac(&s->c, s->header_state);

344 // s->rate_scalability= get_rac(&s->c, s->header_state);

345 GET_S(s->max_ref_frames, tmp < (unsigned)MAX_REF_FRAMES)

346 s->max_ref_frames++;

347

348 decode_qlogs(s);

349 }

350

351 if(!s->keyframe){

352 if(get_rac(&s->c, s->header_state)){

353 for(plane_index=0; plane_index<FFMIN(s->nb_planes, 2); plane_index++){

354 int htaps, i, sum=0;

355 Plane *p= &s->plane[plane_index];

356 p->diag_mc= get_rac(&s->c, s->header_state);

357 htaps= get_symbol(&s->c, s->header_state, 0)*2 + 2;

358 if((unsigned)htaps > HTAPS_MAX || htaps==0)

359 return AVERROR_INVALIDDATA;

360 p->htaps= htaps;

361 for(i= htaps/2; i; i--){

362 p->hcoeff[i]= get_symbol(&s->c, s->header_state, 0) * (1-2*(i&1));

363 sum += p->hcoeff[i];

364 }

365 p->hcoeff[0]= 32-sum;

366 }

367 s->plane[2].diag_mc= s->plane[1].diag_mc;

368 s->plane[2].htaps = s->plane[1].htaps;

369 memcpy(s->plane[2].hcoeff, s->plane[1].hcoeff, sizeof(s->plane[1].hcoeff));

370 }

371 if(get_rac(&s->c, s->header_state)){

372 GET_S(s->spatial_decomposition_count, 0 < tmp && tmp <= MAX_DECOMPOSITIONS)

373 decode_qlogs(s);

374 }

375 }

376

377 s->spatial_decomposition_type+= get_symbol(&s->c, s->header_state, 1);

378 if(s->spatial_decomposition_type > 1U){

379 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_type %d not supported\n", s->spatial_decomposition_type);

380 return AVERROR_INVALIDDATA;

381 }

382 if(FFMIN(s->avctx-> width>>s->chroma_h_shift,

383 s->avctx->height>>s->chroma_v_shift) >> (s->spatial_decomposition_count-1) <= 1){

384 av_log(s->avctx, AV_LOG_ERROR, "spatial_decomposition_count %d too large for size\n", s->spatial_decomposition_count);

385 return AVERROR_INVALIDDATA;

386 }

387

388

389 s->qlog += get_symbol(&s->c, s->header_state, 1);

390 s->mv_scale += get_symbol(&s->c, s->header_state, 1);

391 s->qbias += get_symbol(&s->c, s->header_state, 1);

392 s->block_max_depth+= get_symbol(&s->c, s->header_state, 1);

393 if(s->block_max_depth > 1 || s->block_max_depth < 0){

394 av_log(s->avctx, AV_LOG_ERROR, "block_max_depth= %d is too large\n", s->block_max_depth);

395 s->block_max_depth= 0;

396 return AVERROR_INVALIDDATA;

397 }

398

399 return 0;

400 }

401

402 static av_cold int decode_init(AVCodecContext *avctx)

403 {

404 int ret;

405

406 if ((ret = ff_snow_common_init(avctx)) < 0) {

407 return ret;

408 }

409

410 return 0;

411 }

412

413 static int decode_blocks(SnowContext *s){

414 int x, y;

415 int w= s->b_width;

416 int h= s->b_height;

417 int res;

418

419 for(y=0; y<h; y++){

420 for(x=0; x<w; x++){

421 if ((res = decode_q_branch(s, 0, x, y)) < 0)

422 return res;

423 }

424 }

425 return 0;

426 }

427

428 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,

429 AVPacket *avpkt)

430 {

431 const uint8_t *buf = avpkt->data;

432 int buf_size = avpkt->size;

433 SnowContext *s = avctx->priv_data;

434 RangeCoder * const c= &s->c;

435 int bytes_read;

436 AVFrame *picture = data;

437 int level, orientation, plane_index;

438 int res;

439

440 ff_init_range_decoder(c, buf, buf_size);

441 ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);

442

443 s->current_picture->pict_type= AV_PICTURE_TYPE_I; //FIXME I vs. P

444 if ((res = decode_header(s)) < 0)

445 return res;

446 if ((res=ff_snow_common_init_after_header(avctx)) < 0)

447 return res;

448

449 // realloc slice buffer for the case that spatial_decomposition_count changed

450 ff_slice_buffer_destroy(&s->sb);

451 if ((res = ff_slice_buffer_init(&s->sb, s->plane[0].height,

452 (MB_SIZE >> s->block_max_depth) +

453 s->spatial_decomposition_count * 11 + 1,

454 s->plane[0].width,

455 s->spatial_idwt_buffer)) < 0)

456 return res;

457

458 for(plane_index=0; plane_index < s->nb_planes; plane_index++){

459 Plane *p= &s->plane[plane_index];

460 p->fast_mc= p->diag_mc && p->htaps==6 && p->hcoeff[0]==40

461 && p->hcoeff[1]==-10

462 && p->hcoeff[2]==2;

463 }

464

465 ff_snow_alloc_blocks(s);

466

467 if((res = ff_snow_frame_start(s)) < 0)

468 return res;

469

470 s->current_picture->pict_type = s->keyframe ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;

471

472 //keyframe flag duplication mess FIXME

473 if(avctx->debug&FF_DEBUG_PICT_INFO)

474 av_log(avctx, AV_LOG_ERROR,

475 "keyframe:%d qlog:%d qbias: %d mvscale: %d "

476 "decomposition_type:%d decomposition_count:%d\n",

477 s->keyframe, s->qlog, s->qbias, s->mv_scale,

478 s->spatial_decomposition_type,

479 s->spatial_decomposition_count

480 );

481

482 av_assert0(!s->avmv);

483 if (s->avctx->flags2 & AV_CODEC_FLAG2_EXPORT_MVS) {

484 s->avmv = av_malloc_array(s->b_width * s->b_height, sizeof(AVMotionVector) << (s->block_max_depth*2));

485 }

486 s->avmv_index = 0;

487

488 if ((res = decode_blocks(s)) < 0)

489 return res;

490

491 for(plane_index=0; plane_index < s->nb_planes; plane_index++){

492 Plane *p= &s->plane[plane_index];

493 int w= p->width;

494 int h= p->height;

495 int x, y;

496 int decode_state[MAX_DECOMPOSITIONS][4][1]; /* Stored state info for unpack_coeffs. 1 variable per instance. */

497

498 if(s->avctx->debug&2048){

499 memset(s->spatial_dwt_buffer, 0, sizeof(DWTELEM)*w*h);

500 predict_plane(s, s->spatial_idwt_buffer, plane_index, 1);

501

502 for(y=0; y<h; y++){

503 for(x=0; x<w; x++){

504 int v= s->current_picture->data[plane_index][y*s->current_picture->linesize[plane_index] + x];

505 s->mconly_picture->data[plane_index][y*s->mconly_picture->linesize[plane_index] + x]= v;

506 }

507 }

508 }

509

510 {

511 for(level=0; level<s->spatial_decomposition_count; level++){

512 for(orientation=level ? 1 : 0; orientation<4; orientation++){

513 SubBand *b= &p->band[level][orientation];

514 unpack_coeffs(s, b, b->parent, orientation);

515 }

516 }

517 }

518

519 {

520 const int mb_h= s->b_height << s->block_max_depth;

521 const int block_size = MB_SIZE >> s->block_max_depth;

522 const int block_h = plane_index ? block_size>>s->chroma_v_shift : block_size;

523 int mb_y;

524 DWTCompose cs[MAX_DECOMPOSITIONS];

525 int yd=0, yq=0;

526 int y;

527 int end_y;

528

529 ff_spatial_idwt_buffered_init(cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count);

530 for(mb_y=0; mb_y<=mb_h; mb_y++){

531

532 int slice_starty = block_h*mb_y;

533 int slice_h = block_h*(mb_y+1);

534

535 if (!(s->keyframe || s->avctx->debug&512)){

536 slice_starty = FFMAX(0, slice_starty - (block_h >> 1));

537 slice_h -= (block_h >> 1);

538 }

539

540 for(level=0; level<s->spatial_decomposition_count; level++){

541 for(orientation=level ? 1 : 0; orientation<4; orientation++){

542 SubBand *b= &p->band[level][orientation];

543 int start_y;

544 int end_y;

545 int our_mb_start = mb_y;

546 int our_mb_end = (mb_y + 1);

547 const int extra= 3;

548 start_y = (mb_y ? ((block_h * our_mb_start) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra: 0);

549 end_y = (((block_h * our_mb_end) >> (s->spatial_decomposition_count - level)) + s->spatial_decomposition_count - level + extra);

550 if (!(s->keyframe || s->avctx->debug&512)){

551 start_y = FFMAX(0, start_y - (block_h >> (1+s->spatial_decomposition_count - level)));

552 end_y = FFMAX(0, end_y - (block_h >> (1+s->spatial_decomposition_count - level)));

553 }

554 start_y = FFMIN(b->height, start_y);

555 end_y = FFMIN(b->height, end_y);

556

557 if (start_y != end_y){

558 if (orientation == 0){

559 SubBand * correlate_band = &p->band[0][0];

560 int correlate_end_y = FFMIN(b->height, end_y + 1);

561 int correlate_start_y = FFMIN(b->height, (start_y ? start_y + 1 : 0));

562 decode_subband_slice_buffered(s, correlate_band, &s->sb, correlate_start_y, correlate_end_y, decode_state[0][0]);

563 correlate_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, 1, 0, correlate_start_y, correlate_end_y);

564 dequantize_slice_buffered(s, &s->sb, correlate_band, correlate_band->ibuf, correlate_band->stride, start_y, end_y);

565 }

566 else

567 decode_subband_slice_buffered(s, b, &s->sb, start_y, end_y, decode_state[level][orientation]);

568 }

569 }

570 }

571

572 for(; yd<slice_h; yd+=4){

573 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);

574 }

575

576 if(s->qlog == LOSSLESS_QLOG){

577 for(; yq<slice_h && yq<h; yq++){

578 IDWTELEM * line = slice_buffer_get_line(&s->sb, yq);

579 for(x=0; x<w; x++){

580 line[x] <<= FRAC_BITS;

581 }

582 }

583 }

584

585 predict_slice_buffered(s, &s->sb, s->spatial_idwt_buffer, plane_index, 1, mb_y);

586

587 y = FFMIN(p->height, slice_starty);

588 end_y = FFMIN(p->height, slice_h);

589 while(y < end_y)

590 ff_slice_buffer_release(&s->sb, y++);

591 }

592

593 ff_slice_buffer_flush(&s->sb);

594 }

595

596 }

597

598 emms_c();

599

600 ff_snow_release_buffer(avctx);

601

602 if(!(s->avctx->debug&2048))

603 res = av_frame_ref(picture, s->current_picture);

604 else

605 res = av_frame_ref(picture, s->mconly_picture);

606 if (res >= 0 && s->avmv_index) {

607 AVFrameSideData *sd;

608

609 sd = av_frame_new_side_data(picture, AV_FRAME_DATA_MOTION_VECTORS, s->avmv_index * sizeof(AVMotionVector));

610 if (!sd)

611 return AVERROR(ENOMEM);

612 memcpy(sd->data, s->avmv, s->avmv_index * sizeof(AVMotionVector));

613 }

614

615 av_freep(&s->avmv);

616

617 if (res < 0)

618 return res;

619

620 *got_frame = 1;

621

622 bytes_read= c->bytestream - c->bytestream_start;

623 if(bytes_read ==0) av_log(s->avctx, AV_LOG_ERROR, "error at end of frame\n"); //FIXME

624

625 return bytes_read;

626 }

627

628 static av_cold int decode_end(AVCodecContext *avctx)

629 {

630 SnowContext *s = avctx->priv_data;

631

632 ff_slice_buffer_destroy(&s->sb);

633

634 ff_snow_common_end(s);

635

636 return 0;

637 }

638

639 AVCodec ff_snow_decoder = {

640 .name = "snow",

641 .long_name = NULL_IF_CONFIG_SMALL("Snow"),

642 .type = AVMEDIA_TYPE_VIDEO,

643 .id = AV_CODEC_ID_SNOW,

644 .priv_data_size = sizeof(SnowContext),

645 .init = decode_init,

646 .close = decode_end,

647 .decode = decode_frame,

648 .capabilities = AV_CODEC_CAP_DR1 /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/,

649 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |

650 FF_CODEC_CAP_INIT_CLEANUP,

651 };

FF_CODEC_CAP_INIT_CLEANUP

#define FF_CODEC_CAP_INIT_CLEANUP

The codec allows calling the close function for deallocation even if the init function returned a fai...

Definition: internal.h:48

SnowContext::version

int version

Definition: snow.h:134

SnowContext::mv_scale

int mv_scale

Definition: snow.h:159

predict_plane

static av_always_inline void predict_plane(SnowContext *s, IDWTELEM *buf, int plane_index, int add)

Definition: snow.h:478

ff_snow_frame_start

int ff_snow_frame_start(SnowContext *s)

Definition: snow.c:655

QSHIFT

#define QSHIFT

Definition: snow.h:42

const char * s

Definition: avisynth_c.h:631

AVERROR_INVALIDDATA

#define AVERROR_INVALIDDATA

Invalid data found when processing input.

Definition: error.h:59

SnowContext::avctx

AVCodecContext * avctx

Definition: snow.h:115

SnowContext::block_max_depth

int block_max_depth

Definition: snow.h:166

SnowContext::mconly_picture

AVFrame * mconly_picture

Definition: snow.h:128

SnowContext::chroma_v_shift

int chroma_v_shift

Definition: snow.h:152

AVFrame

This structure describes decoded (raw) audio or video data.

Definition: frame.h:181

Definition: vp9dsp_template.c:2093

data

ptrdiff_t const GLvoid * data

Definition: opengl_enc.c:101

htaps

static const double htaps[HTAPS]

The 2nd half (48 coeffs) of a 96-tap symmetric lowpass filter.

Definition: dsd_tablegen.h:54

AV_PIX_FMT_YUV444P

planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)

Definition: pixfmt.h:68

AVMotionVector::src_x

int16_t src_x

Absolute source position.

Definition: motion_vector.h:38

init

static av_cold int init(AVCodecContext *avctx)

Definition: avrndec.c:35

SnowContext::always_reset

int always_reset

Definition: snow.h:133

BLOCK_INTRA

#define BLOCK_INTRA

Definition: snow.h:57

snow.h

ff_slice_buffer_destroy

void ff_slice_buffer_destroy(slice_buffer *buf)

Definition: snow_dwt.c:103

rangecoder.h

Range coder.

AVPacket::size

int size

Definition: avcodec.h:1468

const char * b

Definition: vf_curves.c:109

av_log2

int av_log2(unsigned v)

Definition: intmath.c:26

decode_end

static av_cold int decode_end(AVCodecContext *avctx)

Definition: snowdec.c:628

AVCodecContext::pix_fmt

enum AVPixelFormat pix_fmt

Pixel format, see AV_PIX_FMT_xxx.

Definition: avcodec.h:1752

SnowContext::max_ref_frames

int max_ref_frames

Definition: snow.h:141

decode_frame

static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

Definition: snowdec.c:428

mpegvideo.h

mpegvideo header.

ff_snow_common_init_after_header

int ff_snow_common_init_after_header(AVCodecContext *avctx)

Definition: snow.c:514

ff_spatial_idwt_buffered_slice

void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs, slice_buffer *slice_buf, IDWTELEM *temp, int width, int height, int stride_line, int type, int decomposition_count, int y)

Definition: snow_dwt.c:658

SnowContext::keyframe

int keyframe

Definition: snow.h:132

AVCodec

AVCodec.

Definition: avcodec.h:3392

ff_snow_reset_contexts

void ff_snow_reset_contexts(SnowContext *s)

Definition: snow.c:96

set_blocks

static void set_blocks(SnowContext *s, int level, int x, int y, int l, int cb, int cr, int mx, int my, int ref, int type)

Definition: snow.h:485

IDWTELEM

short IDWTELEM

Definition: dirac_dwt.h:27

SubBand::qlog

int qlog

log(qscale)/log[2^(1/6)]

Definition: snow.h:87

BlockNode

Definition: snow.h:50

SubBand::width

int width

Definition: cfhd.h:48

HTAPS_MAX

#define HTAPS_MAX

Definition: snow.h:75

BlockNode::level

uint8_t level

Definition: snow.h:60

BlockNode::ref

uint8_t ref

Definition: snow.h:53

av_assert0

#define av_assert0(cond)

assert() equivalent, that is always enabled.

Definition: avassert.h:37

static double cb(void *priv, double x, double y)

Definition: vf_geq.c:97

FF_CODEC_CAP_INIT_THREADSAFE

#define FF_CODEC_CAP_INIT_THREADSAFE

The codec does not modify any global variables in the init function, allowing to call the init functi...

Definition: internal.h:40

SnowContext::b_height

int b_height

Definition: snow.h:165

uint8_t

Definition: audio_convert.c:194

BlockNode::mx

int16_t mx

Definition: snow.h:51

av_cold

#define av_cold

Definition: attributes.h:82

get_rac

static int get_rac(RangeCoder *c, uint8_t *const state)

Definition: rangecoder.h:115

FRAC_BITS

#define FRAC_BITS

Definition: g729postfilter.c:33

opt.h

AVOptions.

FF_DEBUG_PICT_INFO

#define FF_DEBUG_PICT_INFO

Definition: avcodec.h:2764

AVMotionVector::dst_x

int16_t dst_x

Absolute destination position.

Definition: motion_vector.h:42

av_frame_ref

int av_frame_ref(AVFrame *dst, const AVFrame *src)

Set up a new reference to the data described by the source frame.

Definition: frame.c:375

AVFrameSideData

Structure to hold side data for an AVFrame.

Definition: frame.h:144

BlockNode::my

int16_t my

Definition: snow.h:52

AVPacket::data

uint8_t * data

Definition: avcodec.h:1467

AVMotionVector::source

int32_t source

Where the current macroblock comes from; negative value when it comes from the past, positive value when it comes from the future.

Definition: motion_vector.h:30

snow_dwt.h

SnowContext

Definition: snow.h:113

null_block

static const BlockNode null_block

Definition: snow.h:63

ff_snow_release_buffer

void ff_snow_release_buffer(AVCodecContext *avctx)

Definition: snow.c:640

QEXPSHIFT

#define QEXPSHIFT

Definition: snow.h:530

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:28

SubBand

Definition: cfhd.h:43

SnowContext::block

BlockNode * block

Definition: snow.h:170

#define U(x)

Definition: vp56_arith.h:37

SnowContext::dwt

SnowDWTContext dwt

Definition: snow.h:123

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

MB_SIZE

#define MB_SIZE

Definition: cinepakenc.c:86

ff_spatial_idwt_buffered_init

void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width, int height, int stride_line, int type, int decomposition_count)

Definition: snow_dwt.c:639

SnowContext::avmv_index

int avmv_index

Definition: snow.h:188

AVERROR

#define AVERROR(e)

Definition: error.h:43

NULL_IF_CONFIG_SMALL

#define NULL_IF_CONFIG_SMALL(x)

Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...

Definition: internal.h:176

AVMotionVector::w

uint8_t w

Width and height of the block.

Definition: motion_vector.h:34

Plane::diag_mc

int diag_mc

Definition: snow.h:105

pred_mv

static void pred_mv(DiracBlock *block, int stride, int x, int y, int ref)

Definition: diracdec.c:1247

SnowContext::avmv

AVMotionVector * avmv

Definition: snow.h:187

ff_obmc_tab

const uint8_t *const ff_obmc_tab[4]

Definition: snowdata.h:123

line

Definition: graph2dot.c:48

SubBand::stride

int stride

Definition: cfhd.h:46

AVCodec::name

const char * name

Name of the codec implementation.

Definition: avcodec.h:3399

h263.h

FFMAX

#define FFMAX(a, b)

Definition: common.h:94

RangeCoder::bytestream

uint8_t * bytestream

Definition: rangecoder.h:43

BlockNode::color

uint8_t color[3]

Definition: snow.h:54

SnowContext::ref_frames

int ref_frames

Definition: snow.h:142

SubBand::x_coeff

x_and_coeff * x_coeff

Definition: snow.h:93

Plane::htaps

int htaps

Definition: snow.h:103

decode_init

static av_cold int decode_init(AVCodecContext *avctx)

Definition: snowdec.c:402

SnowContext::qlog

int qlog

Definition: snow.h:154

ff_slice_buffer_flush

void ff_slice_buffer_flush(slice_buffer *buf)

Definition: snow_dwt.c:91

get_symbol

static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)

Definition: ffv1dec.c:65

Plane::band

SubBand band[DWT_LEVELS][4]

Definition: cfhd.h:68

AV_PICTURE_TYPE_I

Intra.

Definition: avutil.h:266

AVFrame::pict_type

enum AVPictureType pict_type

Picture type of the frame.

Definition: frame.h:252

SubBand::ibuf

uint8_t * ibuf

Definition: cfhd.h:53

FFMIN

#define FFMIN(a, b)

Definition: common.h:96

unpack_coeffs

static void unpack_coeffs(SnowContext *s, SubBand *b, SubBand *parent, int orientation)

Definition: snow.h:625

AVMotionVector::motion_x

int32_t motion_x

Motion vector src_x = dst_x + motion_x / motion_scale src_y = dst_y + motion_y / motion_scale.

Definition: motion_vector.h:53

LOSSLESS_QLOG

#define LOSSLESS_QLOG

Definition: snow.h:44

mathops.h

x_and_coeff::x

int16_t x

Definition: snow.h:78

AV_FRAME_DATA_MOTION_VECTORS

Motion vectors exported by some codecs (on demand through the export_mvs flag set in the libavcodec A...

Definition: frame.h:96

SnowContext::plane

Plane plane[MAX_PLANES]

Definition: snow.h:169

add_yblock

static av_always_inline void add_yblock(SnowContext *s, int sliced, slice_buffer *sb, IDWTELEM *dst, uint8_t *dst8, const uint8_t *obmc, int src_x, int src_y, int b_w, int b_h, int w, int h, int dst_stride, int src_stride, int obmc_stride, int b_x, int b_y, int add, int offset_dst, int plane_index)

Definition: snow.h:303

SnowContext::b_width

int b_width

Definition: snow.h:164

ff_build_rac_states

void ff_build_rac_states(RangeCoder *c, int factor, int max_p)

Definition: rangecoder.c:64

FFABS

#define FFABS(a)

Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...

Definition: common.h:72

src

#define src

Definition: vp9dsp.c:530

SnowContext::chroma_h_shift

int chroma_h_shift

Definition: snow.h:151

correlate_slice_buffered

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)

Definition: snowdec.c:239

AVCodecContext::height

int height

Definition: avcodec.h:1711

intmath.h

predict_slice_buffered

static av_always_inline void predict_slice_buffered(SnowContext *s, slice_buffer *sb, IDWTELEM *old_buffer, int plane_index, int add, int mb_y)

Definition: snowdec.c:35

SnowContext::block_state

uint8_t block_state[128+32 *128]

Definition: snow.h:131

SnowContext::qbias

int qbias

Definition: snow.h:161

avcodec.h

Libavcodec external API header.

AVMotionVector::src_y

int16_t src_y

Definition: motion_vector.h:38

SnowContext::spatial_decomposition_count

int spatial_decomposition_count

Definition: snow.h:138

RangeCoder

Definition: mss3.c:61

DWTELEM

int DWTELEM

Definition: dirac_dwt.h:26

AVFrame::linesize

int linesize[AV_NUM_DATA_POINTERS]

For video, size in bytes of each picture line.

Definition: frame.h:209

AVCodecContext::debug

int debug

debug

Definition: avcodec.h:2763

ff_slice_buffer_init

int ff_slice_buffer_init(slice_buffer *buf, int line_count, int max_allocated_lines, int line_width, IDWTELEM *base_buffer)

Definition: snow_dwt.c:28

AVCodecContext

main external API structure.

Definition: avcodec.h:1532

Plane::hcoeff

int8_t hcoeff[HTAPS_MAX/2]

Definition: snow.h:104

AV_CODEC_ID_SNOW

Definition: avcodec.h:314

QROOT

#define QROOT

Definition: snow.h:43

ff_snow_alloc_blocks

int ff_snow_alloc_blocks(SnowContext *s)

Definition: snow.c:110

AVFrameSideData::data

uint8_t * data

Definition: frame.h:146

decode_subband_slice_buffered

static void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer *sb, int start_y, int h, int save_state[1])

Definition: snowdec.c:117

SubBand::parent

struct SubBand * parent

Definition: diracdec.c:96

buf

void * buf

Definition: avisynth_c.h:553

type

GLint GLenum type

Definition: opengl_enc.c:105

ff_snow_decoder

AVCodec ff_snow_decoder

Definition: snowdec.c:639

AV_PIX_FMT_YUV410P

planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)

Definition: pixfmt.h:69

av_frame_new_side_data

AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, int size)

Add a new side data to a frame.

Definition: frame.c:601

index

int index

Definition: gxfenc.c:89

ff_init_range_decoder

av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size)

Definition: rangecoder.c:54

SnowContext::nb_planes

int nb_planes

Definition: snow.h:168

mid_pred

#define mid_pred

Definition: mathops.h:95

SubBand::buf_y_offset

int buf_y_offset

Definition: snow.h:91

AVMotionVector::motion_y

int32_t motion_y

Definition: motion_vector.h:53

SnowContext::header_state

uint8_t header_state[32]

Definition: snow.h:130

decode_qlogs

static void decode_qlogs(SnowContext *s)

Definition: snowdec.c:269

SnowContext::spatial_scalability

int spatial_scalability

Definition: snow.h:153

ff_snow_common_init

int ff_snow_common_init(AVCodecContext *avctx)

decode_header

static int decode_header(SnowContext *s)

Definition: snowdec.c:293

x_and_coeff::coeff

uint16_t coeff

Definition: snow.h:79

AVMotionVector::h

uint8_t h

Definition: motion_vector.h:34

SnowContext::spatial_decomposition_type

int spatial_decomposition_type

Definition: snow.h:135

AVFrame::data

uint8_t * data[AV_NUM_DATA_POINTERS]

pointer to the picture/channel planes.

Definition: frame.h:192

SnowContext::current_picture

AVFrame * current_picture

Definition: snow.h:125

level

uint8_t level

Definition: svq3.c:150

AVMotionVector::motion_scale

uint16_t motion_scale

Definition: motion_vector.h:54

MAX_DECOMPOSITIONS

#define MAX_DECOMPOSITIONS

Definition: dirac_dwt.h:30

decode

static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)

Definition: ccaption_dec.c:572

stride

GLint GLenum GLboolean GLsizei stride

Definition: opengl_enc.c:105

AV_PIX_FMT_YUV420P

planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)

Definition: pixfmt.h:63

AV_PIX_FMT_GRAY8

Y , 8bpp.

Definition: pixfmt.h:71

AVMotionVector::flags

uint64_t flags

Extra flag information.

Definition: motion_vector.h:47

MID_STATE

#define MID_STATE

Definition: snow.h:39

SnowContext::temporal_decomposition_type

int temporal_decomposition_type

Definition: snow.h:137

QBIAS_SHIFT

#define QBIAS_SHIFT

Definition: snow.h:163

internal.h

common internal api header.

slice_buffer::line

IDWTELEM ** line

For use by idwt and predict_slices.

Definition: snow_dwt.h:43

SnowContext::temp_idwt_buffer

IDWTELEM * temp_idwt_buffer

Definition: snow.h:148

slice_buffer_get_line

#define slice_buffer_get_line(slice_buf, line_num)

Definition: snow_dwt.h:87

static double c[64]

Definition: vsrc_mptestsrc.c:87

SnowContext::spatial_dwt_buffer

DWTELEM * spatial_dwt_buffer

Definition: snow.h:145

SnowContext::spatial_idwt_buffer

IDWTELEM * spatial_idwt_buffer

Definition: snow.h:147

RangeCoder::bytestream_start

uint8_t * bytestream_start

Definition: rangecoder.h:42

dequantize_slice_buffered

static void dequantize_slice_buffered(SnowContext *s, slice_buffer *sb, SubBand *b, IDWTELEM *src, int stride, int start_y, int end_y)

Definition: snowdec.c:216

AVCodecContext::priv_data

void * priv_data

Definition: avcodec.h:1574

DWTCompose

Definition: dirac_dwt.h:32

SubBand::buf_x_offset

int buf_x_offset

Definition: snow.h:90

SnowContext::colorspace_type

int colorspace_type

Definition: snow.h:150

log.h

SubBand::height

int height

Definition: cfhd.h:50

SnowContext::sb

slice_buffer sb

Definition: snow.h:174

AVMotionVector

Definition: motion_vector.h:24

Plane::fast_mc

int fast_mc

Definition: snow.h:106

AVCodecContext::flags2

int flags2

AV_CODEC_FLAG2_*.

Definition: avcodec.h:1634

Plane::width

int width

Definition: cfhd.h:57

ff_snow_common_end

av_cold void ff_snow_common_end(SnowContext *s)

Definition: snow.c:693

AVMotionVector::dst_y

int16_t dst_y

Definition: motion_vector.h:42

SnowContext::c

RangeCoder c

Definition: snow.h:116

AV_CODEC_FLAG2_EXPORT_MVS

#define AV_CODEC_FLAG2_EXPORT_MVS

Export motion vectors through frame side data.

Definition: avcodec.h:834

ff_qexp

uint8_t ff_qexp[QROOT]

Definition: snowdata.h:128

decode_blocks

static int decode_blocks(SnowContext *s)

Definition: snowdec.c:413

av_freep

#define av_freep(p)

Definition: tableprint_vlc.h:35

MAX_REF_FRAMES

#define MAX_REF_FRAMES

Definition: snow.h:46

ff_slice_buffer_release

void ff_slice_buffer_release(slice_buffer *buf, int line)

Definition: snow_dwt.c:78

AVMEDIA_TYPE_VIDEO

Definition: avutil.h:193

av_always_inline

#define av_always_inline

Definition: attributes.h:39

inverse

static uint32_t inverse(uint32_t v)

find multiplicative inverse modulo 2 ^ 32

Definition: asfcrypt.c:35

av_malloc_array

#define av_malloc_array(a, b)

Definition: tableprint_vlc.h:32

BlockNode::type

uint8_t type

Definition: snow.h:55

slice_buffer

Used to minimize the amount of memory used in order to optimize cache performance.

Definition: snow_dwt.h:42

Plane::height

int height

Definition: cfhd.h:58

static double cr(void *priv, double x, double y)

Definition: vf_geq.c:98

SnowContext::temporal_decomposition_count

int temporal_decomposition_count

Definition: snow.h:140

AVPacket

This structure stores compressed data.

Definition: avcodec.h:1444

decode_q_branch

static int decode_q_branch(SnowContext *s, int level, int x, int y)

Definition: snowdec.c:158

GET_S

#define GET_S(dst, check)

Definition: snowdec.c:285

AV_CODEC_CAP_DR1

#define AV_CODEC_CAP_DR1

Codec uses get_buffer() for allocating buffers and supports custom allocators.

Definition: avcodec.h:856

AV_PICTURE_TYPE_P

Predicted.

Definition: avutil.h:267

Plane

Definition: cfhd.h:56

SubBand::stride_line

int stride_line

Stride measured in lines, not pixels.

Definition: snow.h:92

width

static int width

Definition: demuxing_decoding.c:39

Generated on Mon Feb 15 2016 15:20:42 for FFmpeg by doxygen 1.8.6