FFmpeg: libavcodec/vp6.c Source File

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vp6.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 /**

22 * @file

23 * VP6 compatible video decoder

24 *

25 * The VP6F decoder accepts an optional 1 byte extradata. It is composed of:

26 * - upper 4 bits: difference between encoded width and visible width

27 * - lower 4 bits: difference between encoded height and visible height

28 */

30 #include <stdlib.h>

32 #include "avcodec.h"

33 #include "get_bits.h"

34 #include "huffman.h"

35 #include "internal.h"

37 #include "vp56.h"

38 #include "vp56data.h"

39 #include "vp6data.h"

41 #define VP6_MAX_HUFF_SIZE 12

43 static int vp6_parse_coeff(VP56Context *s);

44 static int vp6_parse_coeff_huffman(VP56Context *s);

46 static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)

47 {

48 VP56RangeCoder *c = &s->c;

49 int parse_filter_info = 0;

50 int coeff_offset = 0;

51 int vrt_shift = 0;

52 int sub_version;

53 int rows, cols;

54 int res = 0;

55 int ret;

56 int separated_coeff = buf[0] & 1;

58 s->frames[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);

59 ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);

61 if (s->frames[VP56_FRAME_CURRENT]->key_frame) {

62 sub_version = buf[1] >> 3;

63 if (sub_version > 8)

64 return AVERROR_INVALIDDATA;

65 s->filter_header = buf[1] & 0x06;

66 if (buf[1] & 1) {

67 avpriv_report_missing_feature(s->avctx, "Interlacing");

68 return AVERROR_PATCHWELCOME;

69 }

70 if (separated_coeff || !s->filter_header) {

71 coeff_offset = AV_RB16(buf+2) - 2;

72 buf += 2;

73 buf_size -= 2;

74 }

76 rows = buf[2]; /* number of stored macroblock rows */

77 cols = buf[3]; /* number of stored macroblock cols */

78 /* buf[4] is number of displayed macroblock rows */

79 /* buf[5] is number of displayed macroblock cols */

80 if (!rows || !cols) {

81 av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4);

82 return AVERROR_INVALIDDATA;

83 }

85 if (!s->macroblocks || /* first frame */

86 16*cols != s->avctx->coded_width ||

87 16*rows != s->avctx->coded_height) {

88 if (s->avctx->extradata_size == 0 &&

89 FFALIGN(s->avctx->width, 16) == 16 * cols &&

90 FFALIGN(s->avctx->height, 16) == 16 * rows) {

91 // We assume this is properly signalled container cropping,

92 // in an F4V file. Just set the coded_width/height, don't

93 // touch the cropped ones.

94 s->avctx->coded_width = 16 * cols;

95 s->avctx->coded_height = 16 * rows;

96 } else {

97 ret = ff_set_dimensions(s->avctx, 16 * cols, 16 * rows);

98 if (ret < 0)

99 return ret;

100

101 if (s->avctx->extradata_size == 1) {

102 s->avctx->width -= s->avctx->extradata[0] >> 4;

103 s->avctx->height -= s->avctx->extradata[0] & 0x0F;

104 }

105 }

106 res = VP56_SIZE_CHANGE;

107 }

108

109 ret = ff_vp56_init_range_decoder(c, buf+6, buf_size-6);

110 if (ret < 0)

111 goto fail;

112 vp56_rac_gets(c, 2);

113

114 parse_filter_info = s->filter_header;

115 if (sub_version < 8)

116 vrt_shift = 5;

117 s->sub_version = sub_version;

118 s->golden_frame = 0;

119 } else {

120 if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height)

121 return AVERROR_INVALIDDATA;

122

123 if (separated_coeff || !s->filter_header) {

124 coeff_offset = AV_RB16(buf+1) - 2;

125 buf += 2;

126 buf_size -= 2;

127 }

128 ret = ff_vp56_init_range_decoder(c, buf+1, buf_size-1);

129 if (ret < 0)

130 return ret;

131

132 s->golden_frame = vp56_rac_get(c);

133 if (s->filter_header) {

134 s->deblock_filtering = vp56_rac_get(c);

135 if (s->deblock_filtering)

136 vp56_rac_get(c);

137 if (s->sub_version > 7)

138 parse_filter_info = vp56_rac_get(c);

139 }

140 }

141

142 if (parse_filter_info) {

143 if (vp56_rac_get(c)) {

144 s->filter_mode = 2;

145 s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift;

146 s->max_vector_length = 2 << vp56_rac_gets(c, 3);

147 } else if (vp56_rac_get(c)) {

148 s->filter_mode = 1;

149 } else {

150 s->filter_mode = 0;

151 }

152 if (s->sub_version > 7)

153 s->filter_selection = vp56_rac_gets(c, 4);

154 else

155 s->filter_selection = 16;

156 }

157

158 s->use_huffman = vp56_rac_get(c);

159

160 s->parse_coeff = vp6_parse_coeff;

161 if (coeff_offset) {

162 buf += coeff_offset;

163 buf_size -= coeff_offset;

164 if (buf_size < 0) {

165 ret = AVERROR_INVALIDDATA;

166 goto fail;

167 }

168 if (s->use_huffman) {

169 s->parse_coeff = vp6_parse_coeff_huffman;

170 init_get_bits(&s->gb, buf, buf_size<<3);

171 } else {

172 ret = ff_vp56_init_range_decoder(&s->cc, buf, buf_size);

173 if (ret < 0)

174 goto fail;

175 s->ccp = &s->cc;

176 }

177 } else {

178 s->ccp = &s->c;

179 }

180

181 return res;

182 fail:

183 if (res == VP56_SIZE_CHANGE)

184 ff_set_dimensions(s->avctx, 0, 0);

185 return ret;

186 }

187

188 static void vp6_coeff_order_table_init(VP56Context *s)

189 {

190 int i, pos, idx = 1;

191

192 s->modelp->coeff_index_to_pos[0] = 0;

193 for (i=0; i<16; i++)

194 for (pos=1; pos<64; pos++)

195 if (s->modelp->coeff_reorder[pos] == i)

196 s->modelp->coeff_index_to_pos[idx++] = pos;

197 }

198

199 static void vp6_default_models_init(VP56Context *s)

200 {

201 VP56Model *model = s->modelp;

202

203 model->vector_dct[0] = 0xA2;

204 model->vector_dct[1] = 0xA4;

205 model->vector_sig[0] = 0x80;

206 model->vector_sig[1] = 0x80;

207

208 memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats));

209 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));

210 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));

211 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));

212 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder));

213

214 vp6_coeff_order_table_init(s);

215 }

216

217 static void vp6_parse_vector_models(VP56Context *s)

218 {

219 VP56RangeCoder *c = &s->c;

220 VP56Model *model = s->modelp;

221 int comp, node;

222

223 for (comp=0; comp<2; comp++) {

224 if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][0]))

225 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);

226 if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][1]))

227 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);

228 }

229

230 for (comp=0; comp<2; comp++)

231 for (node=0; node<7; node++)

232 if (vp56_rac_get_prob_branchy(c, vp6_pdv_pct[comp][node]))

233 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);

234

235 for (comp=0; comp<2; comp++)

236 for (node=0; node<8; node++)

237 if (vp56_rac_get_prob_branchy(c, vp6_fdv_pct[comp][node]))

238 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7);

239 }

240

241 /* nodes must ascend by count, but with descending symbol order */

242 static int vp6_huff_cmp(const void *va, const void *vb)

243 {

244 const Node *a = va, *b = vb;

245 return (a->count - b->count)*16 + (b->sym - a->sym);

246 }

247

248 static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],

249 const uint8_t *map, unsigned size, VLC *vlc)

250 {

251 Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];

252 int a, b, i;

253

254 /* first compute probabilities from model */

255 tmp[0].count = 256;

256 for (i=0; i<size-1; i++) {

257 a = tmp[i].count * coeff_model[i] >> 8;

258 b = tmp[i].count * (255 - coeff_model[i]) >> 8;

259 nodes[map[2*i ]].count = a + !a;

260 nodes[map[2*i+1]].count = b + !b;

261 }

262

263 ff_free_vlc(vlc);

264 /* then build the huffman tree according to probabilities */

265 return ff_huff_build_tree(s->avctx, vlc, size, FF_HUFFMAN_BITS,

266 nodes, vp6_huff_cmp,

267 FF_HUFFMAN_FLAG_HNODE_FIRST);

268 }

269

270 static int vp6_parse_coeff_models(VP56Context *s)

271 {

272 VP56RangeCoder *c = &s->c;

273 VP56Model *model = s->modelp;

274 int def_prob[11];

275 int node, cg, ctx, pos;

276 int ct; /* code type */

277 int pt; /* plane type (0 for Y, 1 for U or V) */

278

279 memset(def_prob, 0x80, sizeof(def_prob));

280

281 for (pt=0; pt<2; pt++)

282 for (node=0; node<11; node++)

283 if (vp56_rac_get_prob_branchy(c, vp6_dccv_pct[pt][node])) {

284 def_prob[node] = vp56_rac_gets_nn(c, 7);

285 model->coeff_dccv[pt][node] = def_prob[node];

286 } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) {

287 model->coeff_dccv[pt][node] = def_prob[node];

288 }

289

290 if (vp56_rac_get(c)) {

291 for (pos=1; pos<64; pos++)

292 if (vp56_rac_get_prob_branchy(c, vp6_coeff_reorder_pct[pos]))

293 model->coeff_reorder[pos] = vp56_rac_gets(c, 4);

294 vp6_coeff_order_table_init(s);

295 }

296

297 for (cg=0; cg<2; cg++)

298 for (node=0; node<14; node++)

299 if (vp56_rac_get_prob_branchy(c, vp6_runv_pct[cg][node]))

300 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7);

301

302 for (ct=0; ct<3; ct++)

303 for (pt=0; pt<2; pt++)

304 for (cg=0; cg<6; cg++)

305 for (node=0; node<11; node++)

306 if (vp56_rac_get_prob_branchy(c, vp6_ract_pct[ct][pt][cg][node])) {

307 def_prob[node] = vp56_rac_gets_nn(c, 7);

308 model->coeff_ract[pt][ct][cg][node] = def_prob[node];

309 } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) {

310 model->coeff_ract[pt][ct][cg][node] = def_prob[node];

311 }

312

313 if (s->use_huffman) {

314 for (pt=0; pt<2; pt++) {

315 if (vp6_build_huff_tree(s, model->coeff_dccv[pt],

316 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]))

317 return -1;

318 if (vp6_build_huff_tree(s, model->coeff_runv[pt],

319 vp6_huff_run_map, 9, &s->runv_vlc[pt]))

320 return -1;

321 for (ct=0; ct<3; ct++)

322 for (cg = 0; cg < 6; cg++)

323 if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],

324 vp6_huff_coeff_map, 12,

325 &s->ract_vlc[pt][ct][cg]))

326 return -1;

327 }

328 memset(s->nb_null, 0, sizeof(s->nb_null));

329 } else {

330 /* coeff_dcct is a linear combination of coeff_dccv */

331 for (pt=0; pt<2; pt++)

332 for (ctx=0; ctx<3; ctx++)

333 for (node=0; node<5; node++)

334 model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);

335 }

336 return 0;

337 }

338

339 static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)

340 {

341 VP56RangeCoder *c = &s->c;

342 VP56Model *model = s->modelp;

343 int comp;

344

345 *vect = (VP56mv) {0,0};

346 if (s->vector_candidate_pos < 2)

347 *vect = s->vector_candidate[0];

348

349 for (comp=0; comp<2; comp++) {

350 int i, delta = 0;

351

352 if (vp56_rac_get_prob_branchy(c, model->vector_dct[comp])) {

353 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4};

354 for (i=0; i<sizeof(prob_order); i++) {

355 int j = prob_order[i];

356 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j;

357 }

358 if (delta & 0xF0)

359 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3;

360 else

361 delta |= 8;

362 } else {

363 delta = vp56_rac_get_tree(c, ff_vp56_pva_tree,

364 model->vector_pdv[comp]);

365 }

366

367 if (delta && vp56_rac_get_prob_branchy(c, model->vector_sig[comp]))

368 delta = -delta;

369

370 if (!comp)

371 vect->x += delta;

372 else

373 vect->y += delta;

374 }

375 }

376

377 /**

378 * Read number of consecutive blocks with null DC or AC.

379 * This value is < 74.

380 */

381 static unsigned vp6_get_nb_null(VP56Context *s)

382 {

383 unsigned val = get_bits(&s->gb, 2);

384 if (val == 2)

385 val += get_bits(&s->gb, 2);

386 else if (val == 3) {

387 val = get_bits1(&s->gb) << 2;

388 val = 6+val + get_bits(&s->gb, 2+val);

389 }

390 return val;

391 }

392

393 static int vp6_parse_coeff_huffman(VP56Context *s)

394 {

395 VP56Model *model = s->modelp;

396 uint8_t *permute = s->idct_scantable;

397 VLC *vlc_coeff;

398 int coeff, sign, coeff_idx;

399 int b, cg, idx;

400 int pt = 0; /* plane type (0 for Y, 1 for U or V) */

401

402 for (b=0; b<6; b++) {

403 int ct = 0; /* code type */

404 if (b > 3) pt = 1;

405 vlc_coeff = &s->dccv_vlc[pt];

406

407 for (coeff_idx = 0;;) {

408 int run = 1;

409 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {

410 s->nb_null[coeff_idx][pt]--;

411 if (coeff_idx)

412 break;

413 } else {

414 if (get_bits_left(&s->gb) <= 0)

415 return AVERROR_INVALIDDATA;

416 coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 3);

417 if (coeff == 0) {

418 if (coeff_idx) {

419 int pt = (coeff_idx >= 6);

420 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 3);

421 if (run >= 9)

422 run += get_bits(&s->gb, 6);

423 } else

424 s->nb_null[0][pt] = vp6_get_nb_null(s);

425 ct = 0;

426 } else if (coeff == 11) { /* end of block */

427 if (coeff_idx == 1) /* first AC coeff ? */

428 s->nb_null[1][pt] = vp6_get_nb_null(s);

429 break;

430 } else {

431 int coeff2 = ff_vp56_coeff_bias[coeff];

432 if (coeff > 4)

433 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);

434 ct = 1 + (coeff2 > 1);

435 sign = get_bits1(&s->gb);

436 coeff2 = (coeff2 ^ -sign) + sign;

437 if (coeff_idx)

438 coeff2 *= s->dequant_ac;

439 idx = model->coeff_index_to_pos[coeff_idx];

440 s->block_coeff[b][permute[idx]] = coeff2;

441 }

442 }

443 coeff_idx+=run;

444 if (coeff_idx >= 64)

445 break;

446 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);

447 vlc_coeff = &s->ract_vlc[pt][ct][cg];

448 }

449 }

450 return 0;

451 }

452

453 static int vp6_parse_coeff(VP56Context *s)

454 {

455 VP56RangeCoder *c = s->ccp;

456 VP56Model *model = s->modelp;

457 uint8_t *permute = s->idct_scantable;

458 uint8_t *model1, *model2, *model3;

459 int coeff, sign, coeff_idx;

460 int b, i, cg, idx, ctx;

461 int pt = 0; /* plane type (0 for Y, 1 for U or V) */

462

463 if (c->end <= c->buffer && c->bits >= 0) {

464 av_log(s->avctx, AV_LOG_ERROR, "End of AC stream reached in vp6_parse_coeff\n");

465 return AVERROR_INVALIDDATA;

466 }

467

468 for (b=0; b<6; b++) {

469 int ct = 1; /* code type */

470 int run = 1;

471

472 if (b > 3) pt = 1;

473

474 ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc

475 + s->above_blocks[s->above_block_idx[b]].not_null_dc;

476 model1 = model->coeff_dccv[pt];

477 model2 = model->coeff_dcct[pt][ctx];

478

479 coeff_idx = 0;

480 for (;;) {

481 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob_branchy(c, model2[0])) {

482 /* parse a coeff */

483 if (vp56_rac_get_prob_branchy(c, model2[2])) {

484 if (vp56_rac_get_prob_branchy(c, model2[3])) {

485 idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1);

486 coeff = ff_vp56_coeff_bias[idx+5];

487 for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--)

488 coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i;

489 } else {

490 if (vp56_rac_get_prob_branchy(c, model2[4]))

491 coeff = 3 + vp56_rac_get_prob(c, model1[5]);

492 else

493 coeff = 2;

494 }

495 ct = 2;

496 } else {

497 ct = 1;

498 coeff = 1;

499 }

500 sign = vp56_rac_get(c);

501 coeff = (coeff ^ -sign) + sign;

502 if (coeff_idx)

503 coeff *= s->dequant_ac;

504 idx = model->coeff_index_to_pos[coeff_idx];

505 s->block_coeff[b][permute[idx]] = coeff;

506 run = 1;

507 } else {

508 /* parse a run */

509 ct = 0;

510 if (coeff_idx > 0) {

511 if (!vp56_rac_get_prob_branchy(c, model2[1]))

512 break;

513

514 model3 = model->coeff_runv[coeff_idx >= 6];

515 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3);

516 if (!run)

517 for (run=9, i=0; i<6; i++)

518 run += vp56_rac_get_prob(c, model3[i+8]) << i;

519 }

520 }

521 coeff_idx += run;

522 if (coeff_idx >= 64)

523 break;

524 cg = vp6_coeff_groups[coeff_idx];

525 model1 = model2 = model->coeff_ract[pt][ct][cg];

526 }

527

528 s->left_block[ff_vp56_b6to4[b]].not_null_dc =

529 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];

530 }

531 return 0;

532 }

533

534 static int vp6_block_variance(uint8_t *src, ptrdiff_t stride)

535 {

536 int sum = 0, square_sum = 0;

537 int y, x;

538

539 for (y=0; y<8; y+=2) {

540 for (x=0; x<8; x+=2) {

541 sum += src[x];

542 square_sum += src[x]*src[x];

543 }

544 src += 2*stride;

545 }

546 return (16*square_sum - sum*sum) >> 8;

547 }

548

549 static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, ptrdiff_t stride,

550 int delta, const int16_t *weights)

551 {

552 int x, y;

553

554 for (y=0; y<8; y++) {

555 for (x=0; x<8; x++) {

556 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0]

557 + src[x ] * weights[1]

558 + src[x+delta ] * weights[2]

559 + src[x+2*delta] * weights[3] + 64) >> 7);

560 }

561 src += stride;

562 dst += stride;

563 }

564 }

565

566 static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,

567 ptrdiff_t stride, int h_weight, int v_weight)

568 {

569 uint8_t *tmp = s->edge_emu_buffer+16;

570 s->h264chroma.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);

571 s->h264chroma.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);

572 }

573

574 static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,

575 int offset1, int offset2, ptrdiff_t stride,

576 VP56mv mv, int mask, int select, int luma)

577 {

578 int filter4 = 0;

579 int x8 = mv.x & mask;

580 int y8 = mv.y & mask;

581

582 if (luma) {

583 x8 *= 2;

584 y8 *= 2;

585 filter4 = s->filter_mode;

586 if (filter4 == 2) {

587 if (s->max_vector_length &&

588 (FFABS(mv.x) > s->max_vector_length ||

589 FFABS(mv.y) > s->max_vector_length)) {

590 filter4 = 0;

591 } else if (s->sample_variance_threshold

592 && (vp6_block_variance(src+offset1, stride)

593 < s->sample_variance_threshold)) {

594 filter4 = 0;

595 }

596 }

597 }

598

599 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) {

600 offset1 = offset2;

601 }

602

603 if (filter4) {

604 if (!y8) { /* left or right combine */

605 vp6_filter_hv4(dst, src+offset1, stride, 1,

606 vp6_block_copy_filter[select][x8]);

607 } else if (!x8) { /* above or below combine */

608 vp6_filter_hv4(dst, src+offset1, stride, stride,

609 vp6_block_copy_filter[select][y8]);

610 } else {

611 s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,

612 vp6_block_copy_filter[select][x8],

613 vp6_block_copy_filter[select][y8]);

614 }

615 } else {

616 if (!x8 || !y8) {

617 s->h264chroma.put_h264_chroma_pixels_tab[0](dst, src + offset1, stride, 8, x8, y8);

618 } else {

619 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);

620 }

621 }

622 }

623

624 static av_cold void vp6_decode_init_context(VP56Context *s);

625

626 static av_cold int vp6_decode_init(AVCodecContext *avctx)

627 {

628 VP56Context *s = avctx->priv_data;

629 int ret;

630

631 if ((ret = ff_vp56_init(avctx, avctx->codec->id == AV_CODEC_ID_VP6,

632 avctx->codec->id == AV_CODEC_ID_VP6A)) < 0)

633 return ret;

634 ff_vp6dsp_init(&s->vp56dsp);

635

636 vp6_decode_init_context(s);

637

638 if (s->has_alpha) {

639 s->alpha_context = av_mallocz(sizeof(VP56Context));

640 ff_vp56_init_context(avctx, s->alpha_context,

641 s->flip == -1, s->has_alpha);

642 ff_vp6dsp_init(&s->alpha_context->vp56dsp);

643 vp6_decode_init_context(s->alpha_context);

644 }

645

646 return 0;

647 }

648

649 static av_cold void vp6_decode_init_context(VP56Context *s)

650 {

651 s->deblock_filtering = 0;

652 s->vp56_coord_div = vp6_coord_div;

653 s->parse_vector_adjustment = vp6_parse_vector_adjustment;

654 s->filter = vp6_filter;

655 s->default_models_init = vp6_default_models_init;

656 s->parse_vector_models = vp6_parse_vector_models;

657 s->parse_coeff_models = vp6_parse_coeff_models;

658 s->parse_header = vp6_parse_header;

659 }

660

661 static av_cold void vp6_decode_free_context(VP56Context *s);

662

663 static av_cold int vp6_decode_free(AVCodecContext *avctx)

664 {

665 VP56Context *s = avctx->priv_data;

666

667 ff_vp56_free(avctx);

668 vp6_decode_free_context(s);

669

670 if (s->alpha_context) {

671 ff_vp56_free_context(s->alpha_context);

672 vp6_decode_free_context(s->alpha_context);

673 av_freep(&s->alpha_context);

674 }

675

676 return 0;

677 }

678

679 static av_cold void vp6_decode_free_context(VP56Context *s)

680 {

681 int pt, ct, cg;

682

683 for (pt=0; pt<2; pt++) {

684 ff_free_vlc(&s->dccv_vlc[pt]);

685 ff_free_vlc(&s->runv_vlc[pt]);

686 for (ct=0; ct<3; ct++)

687 for (cg=0; cg<6; cg++)

688 ff_free_vlc(&s->ract_vlc[pt][ct][cg]);

689 }

690 }

691

692 AVCodec ff_vp6_decoder = {

693 .name = "vp6",

694 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),

695 .type = AVMEDIA_TYPE_VIDEO,

696 .id = AV_CODEC_ID_VP6,

697 .priv_data_size = sizeof(VP56Context),

698 .init = vp6_decode_init,

699 .close = vp6_decode_free,

700 .decode = ff_vp56_decode_frame,

701 .capabilities = AV_CODEC_CAP_DR1,

702 };

703

704 /* flash version, not flipped upside-down */

705 AVCodec ff_vp6f_decoder = {

706 .name = "vp6f",

707 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),

708 .type = AVMEDIA_TYPE_VIDEO,

709 .id = AV_CODEC_ID_VP6F,

710 .priv_data_size = sizeof(VP56Context),

711 .init = vp6_decode_init,

712 .close = vp6_decode_free,

713 .decode = ff_vp56_decode_frame,

714 .capabilities = AV_CODEC_CAP_DR1,

715 };

716

717 /* flash version, not flipped upside-down, with alpha channel */

718 AVCodec ff_vp6a_decoder = {

719 .name = "vp6a",

720 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),

721 .type = AVMEDIA_TYPE_VIDEO,

722 .id = AV_CODEC_ID_VP6A,

723 .priv_data_size = sizeof(VP56Context),

724 .init = vp6_decode_init,

725 .close = vp6_decode_free,

726 .decode = ff_vp56_decode_frame,

727 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS,

728 };

ff_vp56_free

av_cold int ff_vp56_free(AVCodecContext *avctx)

Definition: vp56.c:811

AVCodecContext::codec

const struct AVCodec * codec

Definition: avcodec.h:1527

val

const char const char void * val

Definition: avisynth_c.h:771

vp6_coeff_order_table_init

static void vp6_coeff_order_table_init(VP56Context *s)

Definition: vp6.c:188

VP56Model::coeff_ract

uint8_t coeff_ract[2][3][6][11]

Definition: vp56.h:114

vp6_ract_pct

static const uint8_t vp6_ract_pct[3][2][6][11]

Definition: vp6data.h:95

const char * s

Definition: avisynth_c.h:768

vp6_decode_init

static av_cold int vp6_decode_init(AVCodecContext *avctx)

Definition: vp6.c:626

AVERROR_INVALIDDATA

#define AVERROR_INVALIDDATA

Invalid data found when processing input.

Definition: error.h:59

FF_HUFFMAN_FLAG_HNODE_FIRST

#define FF_HUFFMAN_FLAG_HNODE_FIRST

Definition: huffman.h:38

vp6_runv_pct

static const uint8_t vp6_runv_pct[2][14]

Definition: vp6data.h:90

vp6_build_huff_tree

static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[], const uint8_t *map, unsigned size, VLC *vlc)

Definition: vp6.c:248

VP56Model::coeff_index_to_pos

uint8_t coeff_index_to_pos[64]

Definition: vp56.h:107

VP56_FRAME_CURRENT

Definition: vp56.h:42

vp56.h

VP5 and VP6 compatible video decoder (common features)

vp6_block_copy_filter

static const int16_t vp6_block_copy_filter[17][8][4]

Definition: vp6data.h:151

get_bits

static unsigned int get_bits(GetBitContext *s, int n)

Read 1-25 bits.

Definition: get_bits.h:269

vp6_def_fdv_vector_model

static const uint8_t vp6_def_fdv_vector_model[2][8]

Definition: vp6data.h:33

ff_set_dimensions

int ff_set_dimensions(AVCodecContext *s, int width, int height)

Check that the provided frame dimensions are valid and set them on the codec context.

Definition: utils.c:104

ff_vp56_coeff_bias

const uint8_t ff_vp56_coeff_bias[]

Definition: vp56data.c:67

VP56Model::coeff_dccv

uint8_t coeff_dccv[2][11]

Definition: vp56.h:113

ff_huff_build_tree

int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits, Node *nodes, HuffCmp cmp, int flags)

nodes size must be 2*nb_codes first nb_codes nodes.count must be set

Definition: huffman.c:157

init

static av_cold int init(AVCodecContext *avctx)

Definition: avrndec.c:35

VP56Model::mb_types_stats

uint8_t mb_types_stats[3][10][2]

Definition: vp56.h:119

VP56Model::vector_sig

uint8_t vector_sig[2]

Definition: vp56.h:108

VP56Model::vector_fdv

uint8_t vector_fdv[2][8]

Definition: vp56.h:112

vp6_parse_coeff

static int vp6_parse_coeff(VP56Context *s)

Definition: vp6.c:453

vp6_filter_diag2

static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src, ptrdiff_t stride, int h_weight, int v_weight)

Definition: vp6.c:566

const char * b

Definition: vf_curves.c:113

VP56_SIZE_CHANGE

#define VP56_SIZE_CHANGE

Definition: vp56.h:71

av_mallocz

void * av_mallocz(size_t size)

Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...

Definition: mem.c:236

run

uint8_t run

Definition: svq3.c:206

AV_RB16

uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16

Definition: bytestream.h:87

src

#define src

Definition: vp8dsp.c:254

vp6_huff_coeff_map

static const uint8_t vp6_huff_coeff_map[]

Definition: vp6data.h:304

ff_vp56_init

av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)

Definition: vp56.c:752

AVCodec

AVCodec.

Definition: avcodec.h:3408

vp6_decode_free_context

static av_cold void vp6_decode_free_context(VP56Context *s)

Definition: vp6.c:679

decode

static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)

Definition: decode_audio.c:42

AV_CODEC_ID_VP6

Definition: avcodec.h:309

Node

Definition: huffman.h:32

vp6_def_runv_coeff_model

static const uint8_t vp6_def_runv_coeff_model[2][14]

Definition: vp6data.h:54

VP56mv::y

int16_t y

Definition: vp56.h:68

uint8_t

Definition: audio_convert.c:194

av_cold

#define av_cold

Definition: attributes.h:82

delta

float delta

Definition: vorbis_enc_data.h:457

vp6_def_coeff_reorder

static const uint8_t vp6_def_coeff_reorder[]

Definition: vp6data.h:43

vp6_parse_coeff_models

static int vp6_parse_coeff_models(VP56Context *s)

Definition: vp6.c:270

ff_vp56_init_context

av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, int flip, int has_alpha)

Definition: vp56.c:758

VP6_MAX_HUFF_SIZE

#define VP6_MAX_HUFF_SIZE

Definition: vp6.c:41

int pt

Definition: rtp.c:35

get_bits.h

bitstream reader API header.

size

ptrdiff_t size

Definition: opengl_enc.c:101

vp6_dccv_pct

static const uint8_t vp6_dccv_pct[2][11]

Definition: vp6data.h:74

vp56_rac_get_tree

static av_always_inline int vp56_rac_get_tree(VP56RangeCoder *c, const VP56Tree *tree, const uint8_t *probs)

Definition: vp56.h:365

VP56Model::coeff_reorder

uint8_t coeff_reorder[64]

Definition: vp56.h:106

FFALIGN

#define FFALIGN(x, a)

Definition: macros.h:48

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:28

AV_CODEC_ID_VP6A

Definition: avcodec.h:324

get_bits_left

static int get_bits_left(GetBitContext *gb)

Definition: get_bits.h:596

AVCodec::id

enum AVCodecID id

Definition: avcodec.h:3422

AV_LOG_ERROR

#define AV_LOG_ERROR

Something went wrong and cannot losslessly be recovered.

Definition: log.h:176

mask

static const uint16_t mask[17]

Definition: lzw.c:38

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:186

vp56_rac_get

static av_always_inline int vp56_rac_get(VP56RangeCoder *c)

Definition: vp56.h:289

AVCodec::name

const char * name

Name of the codec implementation.

Definition: avcodec.h:3415

ff_vp56_init_dequant

void ff_vp56_init_dequant(VP56Context *s, int quantizer)

Definition: vp56.c:34

ff_vp6_decoder

AVCodec ff_vp6_decoder

Definition: vp6.c:692

vp6_filter

static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src, int offset1, int offset2, ptrdiff_t stride, VP56mv mv, int mask, int select, int luma)

Definition: vp6.c:574

ff_vp56_b6to4

const uint8_t ff_vp56_b6to4[]

Definition: vp56data.c:29

fail

#define fail()

Definition: checkasm.h:116

VLC

Definition: vlc.h:26

VP56RangeCoder::end

const uint8_t * end

Definition: vp56.h:90

vp6_huff_cmp

static int vp6_huff_cmp(const void *va, const void *vb)

Definition: vp6.c:242

vp6_parse_vector_models

static void vp6_parse_vector_models(VP56Context *s)

Definition: vp6.c:217

ff_vp56_init_range_decoder

int ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size)

Definition: vp56rac.c:40

vp56data.h

VP5 and VP6 compatible video decoder (common data)

vp56_rac_gets_nn

static av_unused int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)

Definition: vp56.h:352

vp6_decode_init_context

static av_cold void vp6_decode_init_context(VP56Context *s)

Definition: vp6.c:649

vp6_filter_hv4

static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, ptrdiff_t stride, int delta, const int16_t *weights)

Definition: vp6.c:549

FF_HUFFMAN_BITS

#define FF_HUFFMAN_BITS

Definition: huffman.h:40

ff_vp6f_decoder

AVCodec ff_vp6f_decoder

Definition: vp6.c:705

FFMIN

#define FFMIN(a, b)

Definition: common.h:96

vp6data.h

VP6 compatible video decoder.

vp6_default_models_init

static void vp6_default_models_init(VP56Context *s)

Definition: vp6.c:199

vp6_huff_run_map

static const uint8_t vp6_huff_run_map[]

Definition: vp6data.h:308

ctx

AVFormatContext * ctx

Definition: movenc.c:48

ff_vp56_decode_frame

int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

Definition: vp56.c:544

ff_vp56_coeff_bit_length

const uint8_t ff_vp56_coeff_bit_length[]

Definition: vp56data.c:68

FFABS

#define FFABS(a)

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

Definition: common.h:72

get_vlc2

static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)

Parse a vlc code.

Definition: get_bits.h:563

vp6_block_variance

static int vp6_block_variance(uint8_t *src, ptrdiff_t stride)

Definition: vp6.c:534

vp56_rac_get_prob

#define vp56_rac_get_prob

Definition: vp56.h:254

vp6_pcr_tree

static const VP56Tree vp6_pcr_tree[]

Definition: vp6data.h:290

VP56Model::coeff_runv

uint8_t coeff_runv[2][14]

Definition: vp56.h:117

comp

static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)

Definition: eamad.c:83

AVERROR_PATCHWELCOME

#define AVERROR_PATCHWELCOME

Not yet implemented in FFmpeg, patches welcome.

Definition: error.h:62

AV_CODEC_CAP_SLICE_THREADS

#define AV_CODEC_CAP_SLICE_THREADS

Codec supports slice-based (or partition-based) multithreading.

Definition: avcodec.h:1019

static const int8_t mv[256][2]

Definition: 4xm.c:77

vp56_rac_get_prob_branchy

static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)

Definition: vp56.h:271

ff_vp6dsp_init

void ff_vp6dsp_init(VP56DSPContext *s)

avcodec.h

Libavcodec external API header.

vp6_coeff_reorder_pct

static const uint8_t vp6_coeff_reorder_pct[]

Definition: vp6data.h:79

ff_vp56_pc_tree

const VP56Tree ff_vp56_pc_tree[]

Definition: vp56data.c:59

AVCodecContext

main external API structure.

Definition: avcodec.h:1518

vp6_fdv_pct

static const uint8_t vp6_fdv_pct[2][8]

Definition: vp6data.h:69

vp6_coord_div

static const uint8_t vp6_coord_div[]

Definition: vp6data.h:302

permute

static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])

Definition: proresdec2.c:40

vp6_get_nb_null

static unsigned vp6_get_nb_null(VP56Context *s)

Read number of consecutive blocks with null DC or AC.

Definition: vp6.c:381

vp6_sig_dct_pct

static const uint8_t vp6_sig_dct_pct[2][2]

Definition: vp6data.h:59

buf

void * buf

Definition: avisynth_c.h:690

ff_vp56_coeff_parse_table

const uint8_t ff_vp56_coeff_parse_table[6][11]

Definition: vp56data.c:31

VP56RangeCoder::bits

int bits

Definition: vp56.h:87

VP56Model::coeff_dcct

uint8_t coeff_dcct[2][36][5]

Definition: vp56.h:116

get_bits1

static unsigned int get_bits1(GetBitContext *s)

Definition: get_bits.h:321

vp6_parse_header

static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)

Definition: vp6.c:46

vp6_decode_free

static av_cold int vp6_decode_free(AVCodecContext *avctx)

Definition: vp6.c:663

init_get_bits

static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)

Initialize GetBitContext.

Definition: get_bits.h:433

huffman.h

huffman tree builder and VLC generator

map

const VDPAUPixFmtMap * map

Definition: hwcontext_vdpau.c:83

Node::sym

int16_t sym

Definition: huffman.h:33

avpriv_report_missing_feature

void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2

Log a generic warning message about a missing feature.

VP56mv

Definition: vp56.h:66

ff_vp56_free_context

av_cold int ff_vp56_free_context(VP56Context *s)

Definition: vp56.c:817

vp6_dccv_lc

static const int vp6_dccv_lc[3][5][2]

Definition: vp6data.h:134

ff_vp56_pva_tree

const VP56Tree ff_vp56_pva_tree[]

Definition: vp56data.c:49

stride

GLint GLenum GLboolean GLsizei stride

Definition: opengl_enc.c:105

VP56mv::x

int16_t x

Definition: vp56.h:67

internal.h

common internal api header.

static double c[64]

Definition: vsrc_mptestsrc.c:87

vp6_parse_vector_adjustment

static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)

Definition: vp6.c:339

VP56RangeCoder

Definition: vp56.h:85

AVCodecContext::priv_data

void * priv_data

Definition: avcodec.h:1545

vp6_coeff_groups

static const uint8_t vp6_coeff_groups[]

Definition: vp6data.h:140

vp6_def_pdv_vector_model

static const uint8_t vp6_def_pdv_vector_model[2][7]

Definition: vp6data.h:38

vp6_parse_coeff_huffman

static int vp6_parse_coeff_huffman(VP56Context *s)

Definition: vp6.c:393

VLC::table

VLC_TYPE(* table)[2]

code, bits

Definition: vlc.h:28

VP56Model::vector_pdv

uint8_t vector_pdv[2][7]

Definition: vp56.h:111

coeff

static const double coeff[2][5]

Definition: vf_owdenoise.c:72

Node::count

uint32_t count

Definition: huffman.h:35

VP56RangeCoder::buffer

const uint8_t * buffer

Definition: vp56.h:89

av_freep

#define av_freep(p)

Definition: tableprint_vlc.h:35

AVMEDIA_TYPE_VIDEO

Definition: avutil.h:201

VP56Model

Definition: vp56.h:105

stride

#define stride

ff_vp56_def_mb_types_stats

const uint8_t ff_vp56_def_mb_types_stats[3][10][2]

Definition: vp56data.c:40

AV_CODEC_ID_VP6F

Definition: avcodec.h:310

ff_vp6a_decoder

AVCodec ff_vp6a_decoder

Definition: vp6.c:718

ff_free_vlc

void ff_free_vlc(VLC *vlc)

Definition: bitstream.c:354

AV_CODEC_CAP_DR1

#define AV_CODEC_CAP_DR1

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

Definition: avcodec.h:959

vp6_pdv_pct

static const uint8_t vp6_pdv_pct[2][7]

Definition: vp6data.h:64

VP56Model::vector_dct

uint8_t vector_dct[2]

Definition: vp56.h:109

Definition: h264pred_template.c:468

vp56_rac_gets

static int vp56_rac_gets(VP56RangeCoder *c, int bits)

Definition: vp56.h:313

tmp

static uint8_t tmp[11]

Definition: aes_ctr.c:26

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