1/* 2 * Copyright (c) 2003 The Libav Project 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/* 22 * How to use this decoder: 23 * SVQ3 data is transported within Apple Quicktime files. Quicktime files 24 * have stsd atoms to describe media trak properties. A stsd atom for a 25 * video trak contains 1 or more ImageDescription atoms. These atoms begin 26 * with the 4-byte length of the atom followed by the codec fourcc. Some 27 * decoders need information in this atom to operate correctly. Such 28 * is the case with SVQ3. In order to get the best use out of this decoder, 29 * the calling app must make the SVQ3 ImageDescription atom available 30 * via the AVCodecContext's extradata[_size] field: 31 * 32 * AVCodecContext.extradata = pointer to ImageDescription, first characters 33 * are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length 34 * AVCodecContext.extradata_size = size of ImageDescription atom memory 35 * buffer (which will be the same as the ImageDescription atom size field 36 * from the QT file, minus 4 bytes since the length is missing) 37 * 38 * You will know you have these parameters passed correctly when the decoder 39 * correctly decodes this file: 40 * http://samples.libav.org/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov 41 */ 42#include "internal.h" 43#include "dsputil.h" 44#include "avcodec.h" 45#include "mpegvideo.h" 46#include "h264.h" 47 48#include "h264data.h" //FIXME FIXME FIXME 49 50#include "h264_mvpred.h" 51#include "golomb.h" 52#include "rectangle.h" 53#include "vdpau_internal.h" 54 55#if CONFIG_ZLIB 56#include <zlib.h> 57#endif 58 59#include "svq1.h" 60 61/** 62 * @file 63 * svq3 decoder. 64 */ 65 66typedef struct { 67 H264Context h; 68 int halfpel_flag; 69 int thirdpel_flag; 70 int unknown_flag; 71 int next_slice_index; 72 uint32_t watermark_key; 73} SVQ3Context; 74 75#define FULLPEL_MODE 1 76#define HALFPEL_MODE 2 77#define THIRDPEL_MODE 3 78#define PREDICT_MODE 4 79 80/* dual scan (from some older h264 draft) 81 o-->o-->o o 82 | /| 83 o o o / o 84 | / | |/ | 85 o o o o 86 / 87 o-->o-->o-->o 88*/ 89static const uint8_t svq3_scan[16] = { 90 0+0*4, 1+0*4, 2+0*4, 2+1*4, 91 2+2*4, 3+0*4, 3+1*4, 3+2*4, 92 0+1*4, 0+2*4, 1+1*4, 1+2*4, 93 0+3*4, 1+3*4, 2+3*4, 3+3*4, 94}; 95 96static const uint8_t svq3_pred_0[25][2] = { 97 { 0, 0 }, 98 { 1, 0 }, { 0, 1 }, 99 { 0, 2 }, { 1, 1 }, { 2, 0 }, 100 { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 }, 101 { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 }, 102 { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 }, 103 { 2, 4 }, { 3, 3 }, { 4, 2 }, 104 { 4, 3 }, { 3, 4 }, 105 { 4, 4 } 106}; 107 108static const int8_t svq3_pred_1[6][6][5] = { 109 { { 2,-1,-1,-1,-1 }, { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, 110 { 2, 1,-1,-1,-1 }, { 1, 2,-1,-1,-1 }, { 1, 2,-1,-1,-1 } }, 111 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 4, 3 }, { 0, 1, 2, 4, 3 }, 112 { 0, 2, 1, 4, 3 }, { 2, 0, 1, 3, 4 }, { 0, 4, 2, 1, 3 } }, 113 { { 2, 0,-1,-1,-1 }, { 2, 1, 0, 4, 3 }, { 1, 2, 4, 0, 3 }, 114 { 2, 1, 0, 4, 3 }, { 2, 1, 4, 3, 0 }, { 1, 2, 4, 0, 3 } }, 115 { { 2, 0,-1,-1,-1 }, { 2, 0, 1, 4, 3 }, { 1, 2, 0, 4, 3 }, 116 { 2, 1, 0, 4, 3 }, { 2, 1, 3, 4, 0 }, { 2, 4, 1, 0, 3 } }, 117 { { 0, 2,-1,-1,-1 }, { 0, 2, 1, 3, 4 }, { 1, 2, 3, 0, 4 }, 118 { 2, 0, 1, 3, 4 }, { 2, 1, 3, 0, 4 }, { 2, 0, 4, 3, 1 } }, 119 { { 0, 2,-1,-1,-1 }, { 0, 2, 4, 1, 3 }, { 1, 4, 2, 0, 3 }, 120 { 4, 2, 0, 1, 3 }, { 2, 0, 1, 4, 3 }, { 4, 2, 1, 0, 3 } }, 121}; 122 123static const struct { uint8_t run; uint8_t level; } svq3_dct_tables[2][16] = { 124 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 }, 125 { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } }, 126 { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 }, 127 { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } } 128}; 129 130static const uint32_t svq3_dequant_coeff[32] = { 131 3881, 4351, 4890, 5481, 6154, 6914, 7761, 8718, 132 9781, 10987, 12339, 13828, 15523, 17435, 19561, 21873, 133 24552, 27656, 30847, 34870, 38807, 43747, 49103, 54683, 134 61694, 68745, 77615, 89113,100253,109366,126635,141533 135}; 136 137void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *output, DCTELEM *input, int qp){ 138 const int qmul = svq3_dequant_coeff[qp]; 139#define stride 16 140 int i; 141 int temp[16]; 142 static const uint8_t x_offset[4]={0, 1*stride, 4*stride, 5*stride}; 143 144 for(i=0; i<4; i++){ 145 const int z0 = 13*(input[4*i+0] + input[4*i+2]); 146 const int z1 = 13*(input[4*i+0] - input[4*i+2]); 147 const int z2 = 7* input[4*i+1] - 17*input[4*i+3]; 148 const int z3 = 17* input[4*i+1] + 7*input[4*i+3]; 149 150 temp[4*i+0] = z0+z3; 151 temp[4*i+1] = z1+z2; 152 temp[4*i+2] = z1-z2; 153 temp[4*i+3] = z0-z3; 154 } 155 156 for(i=0; i<4; i++){ 157 const int offset= x_offset[i]; 158 const int z0= 13*(temp[4*0+i] + temp[4*2+i]); 159 const int z1= 13*(temp[4*0+i] - temp[4*2+i]); 160 const int z2= 7* temp[4*1+i] - 17*temp[4*3+i]; 161 const int z3= 17* temp[4*1+i] + 7*temp[4*3+i]; 162 163 output[stride* 0+offset] = ((z0 + z3)*qmul + 0x80000) >> 20; 164 output[stride* 2+offset] = ((z1 + z2)*qmul + 0x80000) >> 20; 165 output[stride* 8+offset] = ((z1 - z2)*qmul + 0x80000) >> 20; 166 output[stride*10+offset] = ((z0 - z3)*qmul + 0x80000) >> 20; 167 } 168} 169#undef stride 170 171void ff_svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, 172 int dc) 173{ 174 const int qmul = svq3_dequant_coeff[qp]; 175 int i; 176 177 if (dc) { 178 dc = 13*13*((dc == 1) ? 1538*block[0] : ((qmul*(block[0] >> 3)) / 2)); 179 block[0] = 0; 180 } 181 182 for (i = 0; i < 4; i++) { 183 const int z0 = 13*(block[0 + 4*i] + block[2 + 4*i]); 184 const int z1 = 13*(block[0 + 4*i] - block[2 + 4*i]); 185 const int z2 = 7* block[1 + 4*i] - 17*block[3 + 4*i]; 186 const int z3 = 17* block[1 + 4*i] + 7*block[3 + 4*i]; 187 188 block[0 + 4*i] = z0 + z3; 189 block[1 + 4*i] = z1 + z2; 190 block[2 + 4*i] = z1 - z2; 191 block[3 + 4*i] = z0 - z3; 192 } 193 194 for (i = 0; i < 4; i++) { 195 const int z0 = 13*(block[i + 4*0] + block[i + 4*2]); 196 const int z1 = 13*(block[i + 4*0] - block[i + 4*2]); 197 const int z2 = 7* block[i + 4*1] - 17*block[i + 4*3]; 198 const int z3 = 17* block[i + 4*1] + 7*block[i + 4*3]; 199 const int rr = (dc + 0x80000); 200 201 dst[i + stride*0] = av_clip_uint8( dst[i + stride*0] + (((z0 + z3)*qmul + rr) >> 20) ); 202 dst[i + stride*1] = av_clip_uint8( dst[i + stride*1] + (((z1 + z2)*qmul + rr) >> 20) ); 203 dst[i + stride*2] = av_clip_uint8( dst[i + stride*2] + (((z1 - z2)*qmul + rr) >> 20) ); 204 dst[i + stride*3] = av_clip_uint8( dst[i + stride*3] + (((z0 - z3)*qmul + rr) >> 20) ); 205 } 206} 207 208static inline int svq3_decode_block(GetBitContext *gb, DCTELEM *block, 209 int index, const int type) 210{ 211 static const uint8_t *const scan_patterns[4] = 212 { luma_dc_zigzag_scan, zigzag_scan, svq3_scan, chroma_dc_scan }; 213 214 int run, level, sign, vlc, limit; 215 const int intra = (3 * type) >> 2; 216 const uint8_t *const scan = scan_patterns[type]; 217 218 for (limit = (16 >> intra); index < 16; index = limit, limit += 8) { 219 for (; (vlc = svq3_get_ue_golomb(gb)) != 0; index++) { 220 221 if (vlc == INVALID_VLC) 222 return -1; 223 224 sign = (vlc & 0x1) - 1; 225 vlc = (vlc + 1) >> 1; 226 227 if (type == 3) { 228 if (vlc < 3) { 229 run = 0; 230 level = vlc; 231 } else if (vlc < 4) { 232 run = 1; 233 level = 1; 234 } else { 235 run = (vlc & 0x3); 236 level = ((vlc + 9) >> 2) - run; 237 } 238 } else { 239 if (vlc < 16) { 240 run = svq3_dct_tables[intra][vlc].run; 241 level = svq3_dct_tables[intra][vlc].level; 242 } else if (intra) { 243 run = (vlc & 0x7); 244 level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1))); 245 } else { 246 run = (vlc & 0xF); 247 level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0))); 248 } 249 } 250 251 if ((index += run) >= limit) 252 return -1; 253 254 block[scan[index]] = (level ^ sign) - sign; 255 } 256 257 if (type != 2) { 258 break; 259 } 260 } 261 262 return 0; 263} 264 265static inline void svq3_mc_dir_part(MpegEncContext *s, 266 int x, int y, int width, int height, 267 int mx, int my, int dxy, 268 int thirdpel, int dir, int avg) 269{ 270 const Picture *pic = (dir == 0) ? &s->last_picture : &s->next_picture; 271 uint8_t *src, *dest; 272 int i, emu = 0; 273 int blocksize = 2 - (width>>3); //16->0, 8->1, 4->2 274 275 mx += x; 276 my += y; 277 278 if (mx < 0 || mx >= (s->h_edge_pos - width - 1) || 279 my < 0 || my >= (s->v_edge_pos - height - 1)) { 280 281 if ((s->flags & CODEC_FLAG_EMU_EDGE)) { 282 emu = 1; 283 } 284 285 mx = av_clip (mx, -16, (s->h_edge_pos - width + 15)); 286 my = av_clip (my, -16, (s->v_edge_pos - height + 15)); 287 } 288 289 /* form component predictions */ 290 dest = s->current_picture.f.data[0] + x + y*s->linesize; 291 src = pic->f.data[0] + mx + my*s->linesize; 292 293 if (emu) { 294 s->dsp.emulated_edge_mc(s->edge_emu_buffer, src, s->linesize, (width + 1), (height + 1), 295 mx, my, s->h_edge_pos, s->v_edge_pos); 296 src = s->edge_emu_buffer; 297 } 298 if (thirdpel) 299 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->linesize, width, height); 300 else 301 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->linesize, height); 302 303 if (!(s->flags & CODEC_FLAG_GRAY)) { 304 mx = (mx + (mx < (int) x)) >> 1; 305 my = (my + (my < (int) y)) >> 1; 306 width = (width >> 1); 307 height = (height >> 1); 308 blocksize++; 309 310 for (i = 1; i < 3; i++) { 311 dest = s->current_picture.f.data[i] + (x >> 1) + (y >> 1) * s->uvlinesize; 312 src = pic->f.data[i] + mx + my * s->uvlinesize; 313 314 if (emu) { 315 s->dsp.emulated_edge_mc(s->edge_emu_buffer, src, s->uvlinesize, (width + 1), (height + 1), 316 mx, my, (s->h_edge_pos >> 1), (s->v_edge_pos >> 1)); 317 src = s->edge_emu_buffer; 318 } 319 if (thirdpel) 320 (avg ? s->dsp.avg_tpel_pixels_tab : s->dsp.put_tpel_pixels_tab)[dxy](dest, src, s->uvlinesize, width, height); 321 else 322 (avg ? s->dsp.avg_pixels_tab : s->dsp.put_pixels_tab)[blocksize][dxy](dest, src, s->uvlinesize, height); 323 } 324 } 325} 326 327static inline int svq3_mc_dir(H264Context *h, int size, int mode, int dir, 328 int avg) 329{ 330 int i, j, k, mx, my, dx, dy, x, y; 331 MpegEncContext *const s = (MpegEncContext *) h; 332 const int part_width = ((size & 5) == 4) ? 4 : 16 >> (size & 1); 333 const int part_height = 16 >> ((unsigned) (size + 1) / 3); 334 const int extra_width = (mode == PREDICT_MODE) ? -16*6 : 0; 335 const int h_edge_pos = 6*(s->h_edge_pos - part_width ) - extra_width; 336 const int v_edge_pos = 6*(s->v_edge_pos - part_height) - extra_width; 337 338 for (i = 0; i < 16; i += part_height) { 339 for (j = 0; j < 16; j += part_width) { 340 const int b_xy = (4*s->mb_x + (j >> 2)) + (4*s->mb_y + (i >> 2))*h->b_stride; 341 int dxy; 342 x = 16*s->mb_x + j; 343 y = 16*s->mb_y + i; 344 k = ((j >> 2) & 1) + ((i >> 1) & 2) + ((j >> 1) & 4) + (i & 8); 345 346 if (mode != PREDICT_MODE) { 347 pred_motion(h, k, (part_width >> 2), dir, 1, &mx, &my); 348 } else { 349 mx = s->next_picture.f.motion_val[0][b_xy][0] << 1; 350 my = s->next_picture.f.motion_val[0][b_xy][1] << 1; 351 352 if (dir == 0) { 353 mx = ((mx * h->frame_num_offset) / h->prev_frame_num_offset + 1) >> 1; 354 my = ((my * h->frame_num_offset) / h->prev_frame_num_offset + 1) >> 1; 355 } else { 356 mx = ((mx * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1) >> 1; 357 my = ((my * (h->frame_num_offset - h->prev_frame_num_offset)) / h->prev_frame_num_offset + 1) >> 1; 358 } 359 } 360 361 /* clip motion vector prediction to frame border */ 362 mx = av_clip(mx, extra_width - 6*x, h_edge_pos - 6*x); 363 my = av_clip(my, extra_width - 6*y, v_edge_pos - 6*y); 364 365 /* get (optional) motion vector differential */ 366 if (mode == PREDICT_MODE) { 367 dx = dy = 0; 368 } else { 369 dy = svq3_get_se_golomb(&s->gb); 370 dx = svq3_get_se_golomb(&s->gb); 371 372 if (dx == INVALID_VLC || dy == INVALID_VLC) { 373 av_log(h->s.avctx, AV_LOG_ERROR, "invalid MV vlc\n"); 374 return -1; 375 } 376 } 377 378 /* compute motion vector */ 379 if (mode == THIRDPEL_MODE) { 380 int fx, fy; 381 mx = ((mx + 1)>>1) + dx; 382 my = ((my + 1)>>1) + dy; 383 fx = ((unsigned)(mx + 0x3000))/3 - 0x1000; 384 fy = ((unsigned)(my + 0x3000))/3 - 0x1000; 385 dxy = (mx - 3*fx) + 4*(my - 3*fy); 386 387 svq3_mc_dir_part(s, x, y, part_width, part_height, fx, fy, dxy, 1, dir, avg); 388 mx += mx; 389 my += my; 390 } else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) { 391 mx = ((unsigned)(mx + 1 + 0x3000))/3 + dx - 0x1000; 392 my = ((unsigned)(my + 1 + 0x3000))/3 + dy - 0x1000; 393 dxy = (mx&1) + 2*(my&1); 394 395 svq3_mc_dir_part(s, x, y, part_width, part_height, mx>>1, my>>1, dxy, 0, dir, avg); 396 mx *= 3; 397 my *= 3; 398 } else { 399 mx = ((unsigned)(mx + 3 + 0x6000))/6 + dx - 0x1000; 400 my = ((unsigned)(my + 3 + 0x6000))/6 + dy - 0x1000; 401 402 svq3_mc_dir_part(s, x, y, part_width, part_height, mx, my, 0, 0, dir, avg); 403 mx *= 6; 404 my *= 6; 405 } 406 407 /* update mv_cache */ 408 if (mode != PREDICT_MODE) { 409 int32_t mv = pack16to32(mx,my); 410 411 if (part_height == 8 && i < 8) { 412 AV_WN32A(h->mv_cache[dir][scan8[k] + 1*8], mv); 413 414 if (part_width == 8 && j < 8) { 415 AV_WN32A(h->mv_cache[dir][scan8[k] + 1 + 1*8], mv); 416 } 417 } 418 if (part_width == 8 && j < 8) { 419 AV_WN32A(h->mv_cache[dir][scan8[k] + 1], mv); 420 } 421 if (part_width == 4 || part_height == 4) { 422 AV_WN32A(h->mv_cache[dir][scan8[k]], mv); 423 } 424 } 425 426 /* write back motion vectors */ 427 fill_rectangle(s->current_picture.f.motion_val[dir][b_xy], 428 part_width >> 2, part_height >> 2, h->b_stride, 429 pack16to32(mx, my), 4); 430 } 431 } 432 433 return 0; 434} 435 436static int svq3_decode_mb(SVQ3Context *svq3, unsigned int mb_type) 437{ 438 H264Context *h = &svq3->h; 439 int i, j, k, m, dir, mode; 440 int cbp = 0; 441 uint32_t vlc; 442 int8_t *top, *left; 443 MpegEncContext *const s = (MpegEncContext *) h; 444 const int mb_xy = h->mb_xy; 445 const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride; 446 447 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; 448 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; 449 h->topright_samples_available = 0xFFFF; 450 451 if (mb_type == 0) { /* SKIP */ 452 if (s->pict_type == AV_PICTURE_TYPE_P || s->next_picture.f.mb_type[mb_xy] == -1) { 453 svq3_mc_dir_part(s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 0, 0); 454 455 if (s->pict_type == AV_PICTURE_TYPE_B) { 456 svq3_mc_dir_part(s, 16*s->mb_x, 16*s->mb_y, 16, 16, 0, 0, 0, 0, 1, 1); 457 } 458 459 mb_type = MB_TYPE_SKIP; 460 } else { 461 mb_type = FFMIN(s->next_picture.f.mb_type[mb_xy], 6); 462 if (svq3_mc_dir(h, mb_type, PREDICT_MODE, 0, 0) < 0) 463 return -1; 464 if (svq3_mc_dir(h, mb_type, PREDICT_MODE, 1, 1) < 0) 465 return -1; 466 467 mb_type = MB_TYPE_16x16; 468 } 469 } else if (mb_type < 8) { /* INTER */ 470 if (svq3->thirdpel_flag && svq3->halfpel_flag == !get_bits1 (&s->gb)) { 471 mode = THIRDPEL_MODE; 472 } else if (svq3->halfpel_flag && svq3->thirdpel_flag == !get_bits1 (&s->gb)) { 473 mode = HALFPEL_MODE; 474 } else { 475 mode = FULLPEL_MODE; 476 } 477 478 /* fill caches */ 479 /* note ref_cache should contain here: 480 ???????? 481 ???11111 482 N??11111 483 N??11111 484 N??11111 485 */ 486 487 for (m = 0; m < 2; m++) { 488 if (s->mb_x > 0 && h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - 1]+6] != -1) { 489 for (i = 0; i < 4; i++) { 490 AV_COPY32(h->mv_cache[m][scan8[0] - 1 + i*8], s->current_picture.f.motion_val[m][b_xy - 1 + i*h->b_stride]); 491 } 492 } else { 493 for (i = 0; i < 4; i++) { 494 AV_ZERO32(h->mv_cache[m][scan8[0] - 1 + i*8]); 495 } 496 } 497 if (s->mb_y > 0) { 498 memcpy(h->mv_cache[m][scan8[0] - 1*8], s->current_picture.f.motion_val[m][b_xy - h->b_stride], 4*2*sizeof(int16_t)); 499 memset(&h->ref_cache[m][scan8[0] - 1*8], (h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1, 4); 500 501 if (s->mb_x < (s->mb_width - 1)) { 502 AV_COPY32(h->mv_cache[m][scan8[0] + 4 - 1*8], s->current_picture.f.motion_val[m][b_xy - h->b_stride + 4]); 503 h->ref_cache[m][scan8[0] + 4 - 1*8] = 504 (h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride + 1]+6] == -1 || 505 h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride ] ] == -1) ? PART_NOT_AVAILABLE : 1; 506 }else 507 h->ref_cache[m][scan8[0] + 4 - 1*8] = PART_NOT_AVAILABLE; 508 if (s->mb_x > 0) { 509 AV_COPY32(h->mv_cache[m][scan8[0] - 1 - 1*8], s->current_picture.f.motion_val[m][b_xy - h->b_stride - 1]); 510 h->ref_cache[m][scan8[0] - 1 - 1*8] = (h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride - 1]+3] == -1) ? PART_NOT_AVAILABLE : 1; 511 }else 512 h->ref_cache[m][scan8[0] - 1 - 1*8] = PART_NOT_AVAILABLE; 513 }else 514 memset(&h->ref_cache[m][scan8[0] - 1*8 - 1], PART_NOT_AVAILABLE, 8); 515 516 if (s->pict_type != AV_PICTURE_TYPE_B) 517 break; 518 } 519 520 /* decode motion vector(s) and form prediction(s) */ 521 if (s->pict_type == AV_PICTURE_TYPE_P) { 522 if (svq3_mc_dir(h, (mb_type - 1), mode, 0, 0) < 0) 523 return -1; 524 } else { /* AV_PICTURE_TYPE_B */ 525 if (mb_type != 2) { 526 if (svq3_mc_dir(h, 0, mode, 0, 0) < 0) 527 return -1; 528 } else { 529 for (i = 0; i < 4; i++) { 530 memset(s->current_picture.f.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); 531 } 532 } 533 if (mb_type != 1) { 534 if (svq3_mc_dir(h, 0, mode, 1, (mb_type == 3)) < 0) 535 return -1; 536 } else { 537 for (i = 0; i < 4; i++) { 538 memset(s->current_picture.f.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); 539 } 540 } 541 } 542 543 mb_type = MB_TYPE_16x16; 544 } else if (mb_type == 8 || mb_type == 33) { /* INTRA4x4 */ 545 memset(h->intra4x4_pred_mode_cache, -1, 8*5*sizeof(int8_t)); 546 547 if (mb_type == 8) { 548 if (s->mb_x > 0) { 549 for (i = 0; i < 4; i++) { 550 h->intra4x4_pred_mode_cache[scan8[0] - 1 + i*8] = h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - 1]+6-i]; 551 } 552 if (h->intra4x4_pred_mode_cache[scan8[0] - 1] == -1) { 553 h->left_samples_available = 0x5F5F; 554 } 555 } 556 if (s->mb_y > 0) { 557 h->intra4x4_pred_mode_cache[4+8*0] = h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride]+0]; 558 h->intra4x4_pred_mode_cache[5+8*0] = h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride]+1]; 559 h->intra4x4_pred_mode_cache[6+8*0] = h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride]+2]; 560 h->intra4x4_pred_mode_cache[7+8*0] = h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride]+3]; 561 562 if (h->intra4x4_pred_mode_cache[4+8*0] == -1) { 563 h->top_samples_available = 0x33FF; 564 } 565 } 566 567 /* decode prediction codes for luma blocks */ 568 for (i = 0; i < 16; i+=2) { 569 vlc = svq3_get_ue_golomb(&s->gb); 570 571 if (vlc >= 25){ 572 av_log(h->s.avctx, AV_LOG_ERROR, "luma prediction:%d\n", vlc); 573 return -1; 574 } 575 576 left = &h->intra4x4_pred_mode_cache[scan8[i] - 1]; 577 top = &h->intra4x4_pred_mode_cache[scan8[i] - 8]; 578 579 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]]; 580 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]]; 581 582 if (left[1] == -1 || left[2] == -1){ 583 av_log(h->s.avctx, AV_LOG_ERROR, "weird prediction\n"); 584 return -1; 585 } 586 } 587 } else { /* mb_type == 33, DC_128_PRED block type */ 588 for (i = 0; i < 4; i++) { 589 memset(&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_PRED, 4); 590 } 591 } 592 593 write_back_intra_pred_mode(h); 594 595 if (mb_type == 8) { 596 ff_h264_check_intra4x4_pred_mode(h); 597 598 h->top_samples_available = (s->mb_y == 0) ? 0x33FF : 0xFFFF; 599 h->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF; 600 } else { 601 for (i = 0; i < 4; i++) { 602 memset(&h->intra4x4_pred_mode_cache[scan8[0] + 8*i], DC_128_PRED, 4); 603 } 604 605 h->top_samples_available = 0x33FF; 606 h->left_samples_available = 0x5F5F; 607 } 608 609 mb_type = MB_TYPE_INTRA4x4; 610 } else { /* INTRA16x16 */ 611 dir = i_mb_type_info[mb_type - 8].pred_mode; 612 dir = (dir >> 1) ^ 3*(dir & 1) ^ 1; 613 614 if ((h->intra16x16_pred_mode = ff_h264_check_intra_pred_mode(h, dir, 0)) == -1){ 615 av_log(h->s.avctx, AV_LOG_ERROR, "check_intra_pred_mode = -1\n"); 616 return -1; 617 } 618 619 cbp = i_mb_type_info[mb_type - 8].cbp; 620 mb_type = MB_TYPE_INTRA16x16; 621 } 622 623 if (!IS_INTER(mb_type) && s->pict_type != AV_PICTURE_TYPE_I) { 624 for (i = 0; i < 4; i++) { 625 memset(s->current_picture.f.motion_val[0][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); 626 } 627 if (s->pict_type == AV_PICTURE_TYPE_B) { 628 for (i = 0; i < 4; i++) { 629 memset(s->current_picture.f.motion_val[1][b_xy + i*h->b_stride], 0, 4*2*sizeof(int16_t)); 630 } 631 } 632 } 633 if (!IS_INTRA4x4(mb_type)) { 634 memset(h->intra4x4_pred_mode+h->mb2br_xy[mb_xy], DC_PRED, 8); 635 } 636 if (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B) { 637 memset(h->non_zero_count_cache + 8, 0, 14*8*sizeof(uint8_t)); 638 s->dsp.clear_blocks(h->mb+ 0); 639 s->dsp.clear_blocks(h->mb+384); 640 } 641 642 if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B)) { 643 if ((vlc = svq3_get_ue_golomb(&s->gb)) >= 48){ 644 av_log(h->s.avctx, AV_LOG_ERROR, "cbp_vlc=%d\n", vlc); 645 return -1; 646 } 647 648 cbp = IS_INTRA(mb_type) ? golomb_to_intra4x4_cbp[vlc] : golomb_to_inter_cbp[vlc]; 649 } 650 if (IS_INTRA16x16(mb_type) || (s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) { 651 s->qscale += svq3_get_se_golomb(&s->gb); 652 653 if (s->qscale > 31u){ 654 av_log(h->s.avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale); 655 return -1; 656 } 657 } 658 if (IS_INTRA16x16(mb_type)) { 659 AV_ZERO128(h->mb_luma_dc[0]+0); 660 AV_ZERO128(h->mb_luma_dc[0]+8); 661 if (svq3_decode_block(&s->gb, h->mb_luma_dc, 0, 1)){ 662 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding intra luma dc\n"); 663 return -1; 664 } 665 } 666 667 if (cbp) { 668 const int index = IS_INTRA16x16(mb_type) ? 1 : 0; 669 const int type = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1); 670 671 for (i = 0; i < 4; i++) { 672 if ((cbp & (1 << i))) { 673 for (j = 0; j < 4; j++) { 674 k = index ? ((j&1) + 2*(i&1) + 2*(j&2) + 4*(i&2)) : (4*i + j); 675 h->non_zero_count_cache[ scan8[k] ] = 1; 676 677 if (svq3_decode_block(&s->gb, &h->mb[16*k], index, type)){ 678 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding block\n"); 679 return -1; 680 } 681 } 682 } 683 } 684 685 if ((cbp & 0x30)) { 686 for (i = 1; i < 3; ++i) { 687 if (svq3_decode_block(&s->gb, &h->mb[16*16*i], 0, 3)){ 688 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding chroma dc block\n"); 689 return -1; 690 } 691 } 692 693 if ((cbp & 0x20)) { 694 for (i = 1; i < 3; i++) { 695 for (j = 0; j < 4; j++) { 696 k = 16*i + j; 697 h->non_zero_count_cache[ scan8[k] ] = 1; 698 699 if (svq3_decode_block(&s->gb, &h->mb[16*k], 1, 1)){ 700 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding chroma ac block\n"); 701 return -1; 702 } 703 } 704 } 705 } 706 } 707 } 708 709 h->cbp= cbp; 710 s->current_picture.f.mb_type[mb_xy] = mb_type; 711 712 if (IS_INTRA(mb_type)) { 713 h->chroma_pred_mode = ff_h264_check_intra_pred_mode(h, DC_PRED8x8, 1); 714 } 715 716 return 0; 717} 718 719static int svq3_decode_slice_header(AVCodecContext *avctx) 720{ 721 SVQ3Context *svq3 = avctx->priv_data; 722 H264Context *h = &svq3->h; 723 MpegEncContext *s = &h->s; 724 const int mb_xy = h->mb_xy; 725 int i, header; 726 727 header = get_bits(&s->gb, 8); 728 729 if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) { 730 /* TODO: what? */ 731 av_log(avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header); 732 return -1; 733 } else { 734 int length = (header >> 5) & 3; 735 736 svq3->next_slice_index = get_bits_count(&s->gb) + 8*show_bits(&s->gb, 8*length) + 8*length; 737 738 if (svq3->next_slice_index > s->gb.size_in_bits) { 739 av_log(avctx, AV_LOG_ERROR, "slice after bitstream end\n"); 740 return -1; 741 } 742 743 s->gb.size_in_bits = svq3->next_slice_index - 8*(length - 1); 744 skip_bits(&s->gb, 8); 745 746 if (svq3->watermark_key) { 747 uint32_t header = AV_RL32(&s->gb.buffer[(get_bits_count(&s->gb)>>3)+1]); 748 AV_WL32(&s->gb.buffer[(get_bits_count(&s->gb)>>3)+1], header ^ svq3->watermark_key); 749 } 750 if (length > 0) { 751 memcpy((uint8_t *) &s->gb.buffer[get_bits_count(&s->gb) >> 3], 752 &s->gb.buffer[s->gb.size_in_bits >> 3], (length - 1)); 753 } 754 skip_bits_long(&s->gb, 0); 755 } 756 757 if ((i = svq3_get_ue_golomb(&s->gb)) == INVALID_VLC || i >= 3){ 758 av_log(h->s.avctx, AV_LOG_ERROR, "illegal slice type %d \n", i); 759 return -1; 760 } 761 762 h->slice_type = golomb_to_pict_type[i]; 763 764 if ((header & 0x9F) == 2) { 765 i = (s->mb_num < 64) ? 6 : (1 + av_log2 (s->mb_num - 1)); 766 s->mb_skip_run = get_bits(&s->gb, i) - (s->mb_x + (s->mb_y * s->mb_width)); 767 } else { 768 skip_bits1(&s->gb); 769 s->mb_skip_run = 0; 770 } 771 772 h->slice_num = get_bits(&s->gb, 8); 773 s->qscale = get_bits(&s->gb, 5); 774 s->adaptive_quant = get_bits1(&s->gb); 775 776 /* unknown fields */ 777 skip_bits1(&s->gb); 778 779 if (svq3->unknown_flag) { 780 skip_bits1(&s->gb); 781 } 782 783 skip_bits1(&s->gb); 784 skip_bits(&s->gb, 2); 785 786 while (get_bits1(&s->gb)) { 787 skip_bits(&s->gb, 8); 788 } 789 790 /* reset intra predictors and invalidate motion vector references */ 791 if (s->mb_x > 0) { 792 memset(h->intra4x4_pred_mode+h->mb2br_xy[mb_xy - 1 ]+3, -1, 4*sizeof(int8_t)); 793 memset(h->intra4x4_pred_mode+h->mb2br_xy[mb_xy - s->mb_x] , -1, 8*sizeof(int8_t)*s->mb_x); 794 } 795 if (s->mb_y > 0) { 796 memset(h->intra4x4_pred_mode+h->mb2br_xy[mb_xy - s->mb_stride], -1, 8*sizeof(int8_t)*(s->mb_width - s->mb_x)); 797 798 if (s->mb_x > 0) { 799 h->intra4x4_pred_mode[h->mb2br_xy[mb_xy - s->mb_stride - 1]+3] = -1; 800 } 801 } 802 803 return 0; 804} 805 806static av_cold int svq3_decode_init(AVCodecContext *avctx) 807{ 808 SVQ3Context *svq3 = avctx->priv_data; 809 H264Context *h = &svq3->h; 810 MpegEncContext *s = &h->s; 811 int m; 812 unsigned char *extradata; 813 unsigned char *extradata_end; 814 unsigned int size; 815 int marker_found = 0; 816 817 if (ff_h264_decode_init(avctx) < 0) 818 return -1; 819 820 s->flags = avctx->flags; 821 s->flags2 = avctx->flags2; 822 s->unrestricted_mv = 1; 823 h->is_complex=1; 824 avctx->pix_fmt = avctx->codec->pix_fmts[0]; 825 826 if (!s->context_initialized) { 827 h->chroma_qp[0] = h->chroma_qp[1] = 4; 828 829 svq3->halfpel_flag = 1; 830 svq3->thirdpel_flag = 1; 831 svq3->unknown_flag = 0; 832 833 /* prowl for the "SEQH" marker in the extradata */ 834 extradata = (unsigned char *)avctx->extradata; 835 extradata_end = avctx->extradata + avctx->extradata_size; 836 if (extradata) { 837 for (m = 0; m + 8 < avctx->extradata_size; m++) { 838 if (!memcmp(extradata, "SEQH", 4)) { 839 marker_found = 1; 840 break; 841 } 842 extradata++; 843 } 844 } 845 846 /* if a match was found, parse the extra data */ 847 if (marker_found) { 848 849 GetBitContext gb; 850 int frame_size_code; 851 852 size = AV_RB32(&extradata[4]); 853 if (size > extradata_end - extradata - 8) 854 return AVERROR_INVALIDDATA; 855 init_get_bits(&gb, extradata + 8, size*8); 856 857 /* 'frame size code' and optional 'width, height' */ 858 frame_size_code = get_bits(&gb, 3); 859 switch (frame_size_code) { 860 case 0: avctx->width = 160; avctx->height = 120; break; 861 case 1: avctx->width = 128; avctx->height = 96; break; 862 case 2: avctx->width = 176; avctx->height = 144; break; 863 case 3: avctx->width = 352; avctx->height = 288; break; 864 case 4: avctx->width = 704; avctx->height = 576; break; 865 case 5: avctx->width = 240; avctx->height = 180; break; 866 case 6: avctx->width = 320; avctx->height = 240; break; 867 case 7: 868 avctx->width = get_bits(&gb, 12); 869 avctx->height = get_bits(&gb, 12); 870 break; 871 } 872 873 svq3->halfpel_flag = get_bits1(&gb); 874 svq3->thirdpel_flag = get_bits1(&gb); 875 876 /* unknown fields */ 877 skip_bits1(&gb); 878 skip_bits1(&gb); 879 skip_bits1(&gb); 880 skip_bits1(&gb); 881 882 s->low_delay = get_bits1(&gb); 883 884 /* unknown field */ 885 skip_bits1(&gb); 886 887 while (get_bits1(&gb)) { 888 skip_bits(&gb, 8); 889 } 890 891 svq3->unknown_flag = get_bits1(&gb); 892 avctx->has_b_frames = !s->low_delay; 893 if (svq3->unknown_flag) { 894#if CONFIG_ZLIB 895 unsigned watermark_width = svq3_get_ue_golomb(&gb); 896 unsigned watermark_height = svq3_get_ue_golomb(&gb); 897 int u1 = svq3_get_ue_golomb(&gb); 898 int u2 = get_bits(&gb, 8); 899 int u3 = get_bits(&gb, 2); 900 int u4 = svq3_get_ue_golomb(&gb); 901 unsigned long buf_len = watermark_width*watermark_height*4; 902 int offset = (get_bits_count(&gb)+7)>>3; 903 uint8_t *buf; 904 905 if ((uint64_t)watermark_width*4 > UINT_MAX/watermark_height) 906 return -1; 907 908 buf = av_malloc(buf_len); 909 av_log(avctx, AV_LOG_DEBUG, "watermark size: %dx%d\n", watermark_width, watermark_height); 910 av_log(avctx, AV_LOG_DEBUG, "u1: %x u2: %x u3: %x compressed data size: %d offset: %d\n", u1, u2, u3, u4, offset); 911 if (uncompress(buf, &buf_len, extradata + 8 + offset, size - offset) != Z_OK) { 912 av_log(avctx, AV_LOG_ERROR, "could not uncompress watermark logo\n"); 913 av_free(buf); 914 return -1; 915 } 916 svq3->watermark_key = ff_svq1_packet_checksum(buf, buf_len, 0); 917 svq3->watermark_key = svq3->watermark_key << 16 | svq3->watermark_key; 918 av_log(avctx, AV_LOG_DEBUG, "watermark key %#x\n", svq3->watermark_key); 919 av_free(buf); 920#else 921 av_log(avctx, AV_LOG_ERROR, "this svq3 file contains watermark which need zlib support compiled in\n"); 922 return -1; 923#endif 924 } 925 } 926 927 s->width = avctx->width; 928 s->height = avctx->height; 929 930 if (MPV_common_init(s) < 0) 931 return -1; 932 933 h->b_stride = 4*s->mb_width; 934 935 if (ff_h264_alloc_tables(h) < 0) { 936 av_log(avctx, AV_LOG_ERROR, "svq3 memory allocation failed\n"); 937 return AVERROR(ENOMEM); 938 } 939 } 940 941 return 0; 942} 943 944static int svq3_decode_frame(AVCodecContext *avctx, 945 void *data, int *data_size, 946 AVPacket *avpkt) 947{ 948 const uint8_t *buf = avpkt->data; 949 SVQ3Context *svq3 = avctx->priv_data; 950 H264Context *h = &svq3->h; 951 MpegEncContext *s = &h->s; 952 int buf_size = avpkt->size; 953 int m, mb_type; 954 955 /* special case for last picture */ 956 if (buf_size == 0) { 957 if (s->next_picture_ptr && !s->low_delay) { 958 *(AVFrame *) data = *(AVFrame *) &s->next_picture; 959 s->next_picture_ptr = NULL; 960 *data_size = sizeof(AVFrame); 961 } 962 return 0; 963 } 964 965 init_get_bits (&s->gb, buf, 8*buf_size); 966 967 s->mb_x = s->mb_y = h->mb_xy = 0; 968 969 if (svq3_decode_slice_header(avctx)) 970 return -1; 971 972 s->pict_type = h->slice_type; 973 s->picture_number = h->slice_num; 974 975 if (avctx->debug&FF_DEBUG_PICT_INFO){ 976 av_log(h->s.avctx, AV_LOG_DEBUG, "%c hpel:%d, tpel:%d aqp:%d qp:%d, slice_num:%02X\n", 977 av_get_picture_type_char(s->pict_type), svq3->halfpel_flag, svq3->thirdpel_flag, 978 s->adaptive_quant, s->qscale, h->slice_num); 979 } 980 981 /* for skipping the frame */ 982 s->current_picture.f.pict_type = s->pict_type; 983 s->current_picture.f.key_frame = (s->pict_type == AV_PICTURE_TYPE_I); 984 985 /* Skip B-frames if we do not have reference frames. */ 986 if (s->last_picture_ptr == NULL && s->pict_type == AV_PICTURE_TYPE_B) 987 return 0; 988 if ( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B) 989 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I) 990 || avctx->skip_frame >= AVDISCARD_ALL) 991 return 0; 992 993 if (s->next_p_frame_damaged) { 994 if (s->pict_type == AV_PICTURE_TYPE_B) 995 return 0; 996 else 997 s->next_p_frame_damaged = 0; 998 } 999 1000 if (ff_h264_frame_start(h) < 0) 1001 return -1; 1002 1003 if (s->pict_type == AV_PICTURE_TYPE_B) { 1004 h->frame_num_offset = (h->slice_num - h->prev_frame_num); 1005 1006 if (h->frame_num_offset < 0) { 1007 h->frame_num_offset += 256; 1008 } 1009 if (h->frame_num_offset == 0 || h->frame_num_offset >= h->prev_frame_num_offset) { 1010 av_log(h->s.avctx, AV_LOG_ERROR, "error in B-frame picture id\n"); 1011 return -1; 1012 } 1013 } else { 1014 h->prev_frame_num = h->frame_num; 1015 h->frame_num = h->slice_num; 1016 h->prev_frame_num_offset = (h->frame_num - h->prev_frame_num); 1017 1018 if (h->prev_frame_num_offset < 0) { 1019 h->prev_frame_num_offset += 256; 1020 } 1021 } 1022 1023 for (m = 0; m < 2; m++){ 1024 int i; 1025 for (i = 0; i < 4; i++){ 1026 int j; 1027 for (j = -1; j < 4; j++) 1028 h->ref_cache[m][scan8[0] + 8*i + j]= 1; 1029 if (i < 3) 1030 h->ref_cache[m][scan8[0] + 8*i + j]= PART_NOT_AVAILABLE; 1031 } 1032 } 1033 1034 for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) { 1035 for (s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) { 1036 h->mb_xy = s->mb_x + s->mb_y*s->mb_stride; 1037 1038 if ( (get_bits_count(&s->gb) + 7) >= s->gb.size_in_bits && 1039 ((get_bits_count(&s->gb) & 7) == 0 || show_bits(&s->gb, (-get_bits_count(&s->gb) & 7)) == 0)) { 1040 1041 skip_bits(&s->gb, svq3->next_slice_index - get_bits_count(&s->gb)); 1042 s->gb.size_in_bits = 8*buf_size; 1043 1044 if (svq3_decode_slice_header(avctx)) 1045 return -1; 1046 1047 /* TODO: support s->mb_skip_run */ 1048 } 1049 1050 mb_type = svq3_get_ue_golomb(&s->gb); 1051 1052 if (s->pict_type == AV_PICTURE_TYPE_I) { 1053 mb_type += 8; 1054 } else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4) { 1055 mb_type += 4; 1056 } 1057 if ((unsigned)mb_type > 33 || svq3_decode_mb(svq3, mb_type)) { 1058 av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y); 1059 return -1; 1060 } 1061 1062 if (mb_type != 0) { 1063 ff_h264_hl_decode_mb (h); 1064 } 1065 1066 if (s->pict_type != AV_PICTURE_TYPE_B && !s->low_delay) { 1067 s->current_picture.f.mb_type[s->mb_x + s->mb_y * s->mb_stride] = 1068 (s->pict_type == AV_PICTURE_TYPE_P && mb_type < 8) ? (mb_type - 1) : -1; 1069 } 1070 } 1071 1072 ff_draw_horiz_band(s, 16*s->mb_y, 16); 1073 } 1074 1075 MPV_frame_end(s); 1076 1077 if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { 1078 *(AVFrame *) data = *(AVFrame *) &s->current_picture; 1079 } else { 1080 *(AVFrame *) data = *(AVFrame *) &s->last_picture; 1081 } 1082 1083 /* Do not output the last pic after seeking. */ 1084 if (s->last_picture_ptr || s->low_delay) { 1085 *data_size = sizeof(AVFrame); 1086 } 1087 1088 return buf_size; 1089} 1090 1091static int svq3_decode_end(AVCodecContext *avctx) 1092{ 1093 SVQ3Context *svq3 = avctx->priv_data; 1094 H264Context *h = &svq3->h; 1095 MpegEncContext *s = &h->s; 1096 1097 ff_h264_free_context(h); 1098 1099 MPV_common_end(s); 1100 1101 return 0; 1102} 1103 1104AVCodec ff_svq3_decoder = { 1105 .name = "svq3", 1106 .type = AVMEDIA_TYPE_VIDEO, 1107 .id = CODEC_ID_SVQ3, 1108 .priv_data_size = sizeof(SVQ3Context), 1109 .init = svq3_decode_init, 1110 .close = svq3_decode_end, 1111 .decode = svq3_decode_frame, 1112 .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_DELAY, 1113 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3"), 1114 .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_NONE}, 1115}; 1116