FFmpeg: libavcodec/msmpeg4enc.c Source File

FFmpeg

[フレーム]

libavcodec

msmpeg4enc.c

Go to the documentation of this file.

1 /*

2 * MSMPEG4 encoder backend

5 *

6 * msmpeg4v1 & v2 stuff by Michael Niedermayer <michaelni@gmx.at>

7 *

8 * This file is part of FFmpeg.

9 *

10 * FFmpeg is free software; you can redistribute it and/or

11 * modify it under the terms of the GNU Lesser General Public

12 * License as published by the Free Software Foundation; either

13 * version 2.1 of the License, or (at your option) any later version.

14 *

15 * FFmpeg is distributed in the hope that it will be useful,

16 * but WITHOUT ANY WARRANTY; without even the implied warranty of

17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

18 * Lesser General Public License for more details.

19 *

20 * You should have received a copy of the GNU Lesser General Public

21 * License along with FFmpeg; if not, write to the Free Software

22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

23 */

25 /**

26 * @file

27 * MSMPEG4 encoder backend

28 */

30 #include <stdint.h>

31 #include <string.h>

33 #include "libavutil/attributes.h"

34 #include "libavutil/avutil.h"

35 #include "libavutil/mem.h"

36 #include "mpegvideo.h"

37 #include "h263.h"

38 #include "internal.h"

39 #include "mpeg4video.h"

40 #include "msmpeg4.h"

41 #include "msmpeg4data.h"

42 #include "put_bits.h"

43 #include "rl.h"

44 #include "vc1data.h"

46 static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2];

48 /* build the table which associate a (x,y) motion vector to a vlc */

49 static av_cold int init_mv_table(MVTable *tab)

50 {

51 int i, x, y;

53 tab->table_mv_index = av_malloc(sizeof(uint16_t) * 4096);

54 if (!tab->table_mv_index)

55 return AVERROR(ENOMEM);

57 /* mark all entries as not used */

58 for(i=0;i<4096;i++)

59 tab->table_mv_index[i] = tab->n;

61 for(i=0;i<tab->n;i++) {

62 x = tab->table_mvx[i];

63 y = tab->table_mvy[i];

64 tab->table_mv_index[(x << 6) | y] = i;

65 }

67 return 0;

68 }

70 void ff_msmpeg4_code012(PutBitContext *pb, int n)

71 {

72 if (n == 0) {

73 put_bits(pb, 1, 0);

74 } else {

75 put_bits(pb, 1, 1);

76 put_bits(pb, 1, (n >= 2));

77 }

78 }

80 static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){

81 int size=0;

82 int code;

83 int run_diff= intra ? 0 : 1;

85 code = get_rl_index(rl, last, run, level);

86 size+= rl->table_vlc[code][1];

87 if (code == rl->n) {

88 int level1, run1;

90 level1 = level - rl->max_level[last][run];

91 if (level1 < 1)

92 goto esc2;

93 code = get_rl_index(rl, last, run, level1);

94 if (code == rl->n) {

95 esc2:

96 size++;

97 if (level > MAX_LEVEL)

98 goto esc3;

99 run1 = run - rl->max_run[last][level] - run_diff;

100 if (run1 < 0)

101 goto esc3;

102 code = get_rl_index(rl, last, run1, level);

103 if (code == rl->n) {

104 esc3:

105 /* third escape */

106 size+=1+1+6+8;

107 } else {

108 /* second escape */

109 size+= 1+1+ rl->table_vlc[code][1];

110 }

111 } else {

112 /* first escape */

113 size+= 1+1+ rl->table_vlc[code][1];

114 }

115 } else {

116 size++;

117 }

118 return size;

119 }

120

121 av_cold int ff_msmpeg4_encode_init(MpegEncContext *s)

122 {

123 static int init_done=0;

124 int i, ret;

125

126 ff_msmpeg4_common_init(s);

127 if(s->msmpeg4_version>=4){

128 s->min_qcoeff= -255;

129 s->max_qcoeff= 255;

130 }

131

132 if (!init_done) {

133 /* init various encoding tables */

134 init_done = 1;

135 if ((ret = init_mv_table(&ff_mv_tables[0])) < 0)

136 return ret;

137 if ((ret = init_mv_table(&ff_mv_tables[1])) < 0)

138 return ret;

139 for(i=0;i<NB_RL_TABLES;i++)

140 ff_rl_init(&ff_rl_table[i], ff_static_rl_table_store[i]);

141

142 for(i=0; i<NB_RL_TABLES; i++){

143 int level;

144 for (level = 1; level <= MAX_LEVEL; level++) {

145 int run;

146 for(run=0; run<=MAX_RUN; run++){

147 int last;

148 for(last=0; last<2; last++){

149 rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0);

150 }

151 }

152 }

153 }

154 }

155

156 return 0;

157 }

158

159 static void find_best_tables(MpegEncContext * s)

160 {

161 int i;

162 int best = 0, best_size = INT_MAX;

163 int chroma_best = 0, best_chroma_size = INT_MAX;

164

165 for(i=0; i<3; i++){

166 int level;

167 int chroma_size=0;

168 int size=0;

169

170 if(i>0){// ;)

171 size++;

172 chroma_size++;

173 }

174 for(level=0; level<=MAX_LEVEL; level++){

175 int run;

176 for(run=0; run<=MAX_RUN; run++){

177 int last;

178 const int last_size= size + chroma_size;

179 for(last=0; last<2; last++){

180 int inter_count = s->ac_stats[0][0][level][run][last] + s->ac_stats[0][1][level][run][last];

181 int intra_luma_count = s->ac_stats[1][0][level][run][last];

182 int intra_chroma_count= s->ac_stats[1][1][level][run][last];

183

184 if(s->pict_type==AV_PICTURE_TYPE_I){

185 size += intra_luma_count *rl_length[i ][level][run][last];

186 chroma_size+= intra_chroma_count*rl_length[i+3][level][run][last];

187 }else{

188 size+= intra_luma_count *rl_length[i ][level][run][last]

189 +intra_chroma_count*rl_length[i+3][level][run][last]

190 +inter_count *rl_length[i+3][level][run][last];

191 }

192 }

193 if(last_size == size+chroma_size) break;

194 }

195 }

196 if(size<best_size){

197 best_size= size;

198 best= i;

199 }

200 if(chroma_size<best_chroma_size){

201 best_chroma_size= chroma_size;

202 chroma_best= i;

203 }

204 }

205

206 if(s->pict_type==AV_PICTURE_TYPE_P) chroma_best= best;

207

208 memset(s->ac_stats, 0, sizeof(int)*(MAX_LEVEL+1)*(MAX_RUN+1)*2*2*2);

209

210 s->rl_table_index = best;

211 s->rl_chroma_table_index= chroma_best;

212

213 if(s->pict_type != s->last_non_b_pict_type){

214 s->rl_table_index= 2;

215 if(s->pict_type==AV_PICTURE_TYPE_I)

216 s->rl_chroma_table_index= 1;

217 else

218 s->rl_chroma_table_index= 2;

219 }

220

221 }

222

223 /* write MSMPEG4 compatible frame header */

224 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number)

225 {

226 find_best_tables(s);

227

228 avpriv_align_put_bits(&s->pb);

229 put_bits(&s->pb, 2, s->pict_type - 1);

230

231 put_bits(&s->pb, 5, s->qscale);

232 if(s->msmpeg4_version<=2){

233 s->rl_table_index = 2;

234 s->rl_chroma_table_index = 2;

235 }

236

237 s->dc_table_index = 1;

238 s->mv_table_index = 1; /* only if P-frame */

239 s->use_skip_mb_code = 1; /* only if P-frame */

240 s->per_mb_rl_table = 0;

241 if(s->msmpeg4_version==4)

242 s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE && s->pict_type==AV_PICTURE_TYPE_P);

243 ff_dlog(s, "%d %"PRId64" %d %d %d\n", s->pict_type, s->bit_rate,

244 s->inter_intra_pred, s->width, s->height);

245

246 if (s->pict_type == AV_PICTURE_TYPE_I) {

247 s->slice_height= s->mb_height/1;

248 put_bits(&s->pb, 5, 0x16 + s->mb_height/s->slice_height);

249

250 if(s->msmpeg4_version==4){

251 ff_msmpeg4_encode_ext_header(s);

252 if(s->bit_rate>MBAC_BITRATE)

253 put_bits(&s->pb, 1, s->per_mb_rl_table);

254 }

255

256 if(s->msmpeg4_version>2){

257 if(!s->per_mb_rl_table){

258 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);

259 ff_msmpeg4_code012(&s->pb, s->rl_table_index);

260 }

261

262 put_bits(&s->pb, 1, s->dc_table_index);

263 }

264 } else {

265 put_bits(&s->pb, 1, s->use_skip_mb_code);

266

267 if(s->msmpeg4_version==4 && s->bit_rate>MBAC_BITRATE)

268 put_bits(&s->pb, 1, s->per_mb_rl_table);

269

270 if(s->msmpeg4_version>2){

271 if(!s->per_mb_rl_table)

272 ff_msmpeg4_code012(&s->pb, s->rl_table_index);

273

274 put_bits(&s->pb, 1, s->dc_table_index);

275

276 put_bits(&s->pb, 1, s->mv_table_index);

277 }

278 }

279

280 s->esc3_level_length= 0;

281 s->esc3_run_length= 0;

282 }

283

284 void ff_msmpeg4_encode_ext_header(MpegEncContext * s)

285 {

286 unsigned fps = s->avctx->time_base.den / s->avctx->time_base.num / FFMAX(s->avctx->ticks_per_frame, 1);

287 put_bits(&s->pb, 5, FFMIN(fps, 31)); //yes 29.97 -> 29

288

289 put_bits(&s->pb, 11, FFMIN(s->bit_rate/1024, 2047));

290

291 if(s->msmpeg4_version>=3)

292 put_bits(&s->pb, 1, s->flipflop_rounding);

293 else

294 av_assert0(s->flipflop_rounding==0);

295 }

296

297 void ff_msmpeg4_encode_motion(MpegEncContext * s,

298 int mx, int my)

299 {

300 int code;

301 MVTable *mv;

302

303 /* modulo encoding */

304 /* WARNING : you cannot reach all the MVs even with the modulo

305 encoding. This is a somewhat strange compromise they took !!! */

306 if (mx <= -64)

307 mx += 64;

308 else if (mx >= 64)

309 mx -= 64;

310 if (my <= -64)

311 my += 64;

312 else if (my >= 64)

313 my -= 64;

314

315 mx += 32;

316 my += 32;

317 mv = &ff_mv_tables[s->mv_table_index];

318

319 code = mv->table_mv_index[(mx << 6) | my];

320 put_bits(&s->pb,

321 mv->table_mv_bits[code],

322 mv->table_mv_code[code]);

323 if (code == mv->n) {

324 /* escape : code literally */

325 put_bits(&s->pb, 6, mx);

326 put_bits(&s->pb, 6, my);

327 }

328 }

329

330 void ff_msmpeg4_handle_slices(MpegEncContext *s){

331 if (s->mb_x == 0) {

332 if (s->slice_height && (s->mb_y % s->slice_height) == 0) {

333 if(s->msmpeg4_version < 4){

334 ff_mpeg4_clean_buffers(s);

335 }

336 s->first_slice_line = 1;

337 } else {

338 s->first_slice_line = 0;

339 }

340 }

341 }

342

343 static void msmpeg4v2_encode_motion(MpegEncContext * s, int val)

344 {

345 int range, bit_size, sign, code, bits;

346

347 if (val == 0) {

348 /* zero vector */

349 code = 0;

350 put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]);

351 } else {

352 bit_size = s->f_code - 1;

353 range = 1 << bit_size;

354 if (val <= -64)

355 val += 64;

356 else if (val >= 64)

357 val -= 64;

358

359 if (val >= 0) {

360 sign = 0;

361 } else {

362 val = -val;

363 sign = 1;

364 }

365 val--;

366 code = (val >> bit_size) + 1;

367 bits = val & (range - 1);

368

369 put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign);

370 if (bit_size > 0) {

371 put_bits(&s->pb, bit_size, bits);

372 }

373 }

374 }

375

376 void ff_msmpeg4_encode_mb(MpegEncContext * s,

377 int16_t block[6][64],

378 int motion_x, int motion_y)

379 {

380 int cbp, coded_cbp, i;

381 int pred_x, pred_y;

382 uint8_t *coded_block;

383

384 ff_msmpeg4_handle_slices(s);

385

386 if (!s->mb_intra) {

387 /* compute cbp */

388 cbp = 0;

389 for (i = 0; i < 6; i++) {

390 if (s->block_last_index[i] >= 0)

391 cbp |= 1 << (5 - i);

392 }

393 if (s->use_skip_mb_code && (cbp | motion_x | motion_y) == 0) {

394 /* skip macroblock */

395 put_bits(&s->pb, 1, 1);

396 s->last_bits++;

397 s->misc_bits++;

398 s->skip_count++;

399

400 return;

401 }

402 if (s->use_skip_mb_code)

403 put_bits(&s->pb, 1, 0); /* mb coded */

404

405 if(s->msmpeg4_version<=2){

406 put_bits(&s->pb,

407 ff_v2_mb_type[cbp&3][1],

408 ff_v2_mb_type[cbp&3][0]);

409 if((cbp&3) != 3) coded_cbp= cbp ^ 0x3C;

410 else coded_cbp= cbp;

411

412 put_bits(&s->pb,

413 ff_h263_cbpy_tab[coded_cbp>>2][1],

414 ff_h263_cbpy_tab[coded_cbp>>2][0]);

415

416 s->misc_bits += get_bits_diff(s);

417

418 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);

419 msmpeg4v2_encode_motion(s, motion_x - pred_x);

420 msmpeg4v2_encode_motion(s, motion_y - pred_y);

421 }else{

422 put_bits(&s->pb,

423 ff_table_mb_non_intra[cbp + 64][1],

424 ff_table_mb_non_intra[cbp + 64][0]);

425

426 s->misc_bits += get_bits_diff(s);

427

428 /* motion vector */

429 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);

430 ff_msmpeg4_encode_motion(s, motion_x - pred_x,

431 motion_y - pred_y);

432 }

433

434 s->mv_bits += get_bits_diff(s);

435

436 for (i = 0; i < 6; i++) {

437 ff_msmpeg4_encode_block(s, block[i], i);

438 }

439 s->p_tex_bits += get_bits_diff(s);

440 } else {

441 /* compute cbp */

442 cbp = 0;

443 coded_cbp = 0;

444 for (i = 0; i < 6; i++) {

445 int val, pred;

446 val = (s->block_last_index[i] >= 1);

447 cbp |= val << (5 - i);

448 if (i < 4) {

449 /* predict value for close blocks only for luma */

450 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);

451 *coded_block = val;

452 val = val ^ pred;

453 }

454 coded_cbp |= val << (5 - i);

455 }

456

457 if(s->msmpeg4_version<=2){

458 if (s->pict_type == AV_PICTURE_TYPE_I) {

459 put_bits(&s->pb,

460 ff_v2_intra_cbpc[cbp&3][1], ff_v2_intra_cbpc[cbp&3][0]);

461 } else {

462 if (s->use_skip_mb_code)

463 put_bits(&s->pb, 1, 0); /* mb coded */

464 put_bits(&s->pb,

465 ff_v2_mb_type[(cbp&3) + 4][1],

466 ff_v2_mb_type[(cbp&3) + 4][0]);

467 }

468 put_bits(&s->pb, 1, 0); /* no AC prediction yet */

469 put_bits(&s->pb,

470 ff_h263_cbpy_tab[cbp>>2][1],

471 ff_h263_cbpy_tab[cbp>>2][0]);

472 }else{

473 if (s->pict_type == AV_PICTURE_TYPE_I) {

474 put_bits(&s->pb,

475 ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);

476 } else {

477 if (s->use_skip_mb_code)

478 put_bits(&s->pb, 1, 0); /* mb coded */

479 put_bits(&s->pb,

480 ff_table_mb_non_intra[cbp][1],

481 ff_table_mb_non_intra[cbp][0]);

482 }

483 put_bits(&s->pb, 1, 0); /* no AC prediction yet */

484 if(s->inter_intra_pred){

485 s->h263_aic_dir=0;

486 put_bits(&s->pb, ff_table_inter_intra[s->h263_aic_dir][1], ff_table_inter_intra[s->h263_aic_dir][0]);

487 }

488 }

489 s->misc_bits += get_bits_diff(s);

490

491 for (i = 0; i < 6; i++) {

492 ff_msmpeg4_encode_block(s, block[i], i);

493 }

494 s->i_tex_bits += get_bits_diff(s);

495 s->i_count++;

496 }

497 }

498

499 static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr)

500 {

501 int sign, code;

502 int pred, av_uninit(extquant);

503 int extrabits = 0;

504

505 int16_t *dc_val;

506 pred = ff_msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);

507

508 /* update predictor */

509 if (n < 4) {

510 *dc_val = level * s->y_dc_scale;

511 } else {

512 *dc_val = level * s->c_dc_scale;

513 }

514

515 /* do the prediction */

516 level -= pred;

517

518 if(s->msmpeg4_version<=2){

519 if (n < 4) {

520 put_bits(&s->pb,

521 ff_v2_dc_lum_table[level + 256][1],

522 ff_v2_dc_lum_table[level + 256][0]);

523 }else{

524 put_bits(&s->pb,

525 ff_v2_dc_chroma_table[level + 256][1],

526 ff_v2_dc_chroma_table[level + 256][0]);

527 }

528 }else{

529 sign = 0;

530 if (level < 0) {

531 level = -level;

532 sign = 1;

533 }

534 code = level;

535 if (code > DC_MAX)

536 code = DC_MAX;

537 else if( s->msmpeg4_version>=6 ) {

538 if( s->qscale == 1 ) {

539 extquant = (level + 3) & 0x3;

540 code = ((level+3)>>2);

541 } else if( s->qscale == 2 ) {

542 extquant = (level + 1) & 0x1;

543 code = ((level+1)>>1);

544 }

545 }

546

547 if (s->dc_table_index == 0) {

548 if (n < 4) {

549 put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);

550 } else {

551 put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);

552 }

553 } else {

554 if (n < 4) {

555 put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);

556 } else {

557 put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);

558 }

559 }

560

561 if(s->msmpeg4_version>=6 && s->qscale<=2)

562 extrabits = 3 - s->qscale;

563

564 if (code == DC_MAX)

565 put_bits(&s->pb, 8 + extrabits, level);

566 else if(extrabits > 0)//== VC1 && s->qscale<=2

567 put_bits(&s->pb, extrabits, extquant);

568

569 if (level != 0) {

570 put_bits(&s->pb, 1, sign);

571 }

572 }

573 }

574

575 /* Encoding of a block; very similar to MPEG-4 except for a different

576 * escape coding (same as H.263) and more VLC tables. */

577 void ff_msmpeg4_encode_block(MpegEncContext * s, int16_t * block, int n)

578 {

579 int level, run, last, i, j, last_index;

580 int last_non_zero, sign, slevel;

581 int code, run_diff, dc_pred_dir;

582 const RLTable *rl;

583 const uint8_t *scantable;

584

585 if (s->mb_intra) {

586 msmpeg4_encode_dc(s, block[0], n, &dc_pred_dir);

587 i = 1;

588 if (n < 4) {

589 rl = &ff_rl_table[s->rl_table_index];

590 } else {

591 rl = &ff_rl_table[3 + s->rl_chroma_table_index];

592 }

593 run_diff = s->msmpeg4_version>=4;

594 scantable= s->intra_scantable.permutated;

595 } else {

596 i = 0;

597 rl = &ff_rl_table[3 + s->rl_table_index];

598 if(s->msmpeg4_version<=2)

599 run_diff = 0;

600 else

601 run_diff = 1;

602 scantable= s->inter_scantable.permutated;

603 }

604

605 /* recalculate block_last_index for M$ wmv1 */

606 if(s->msmpeg4_version>=4 && s->msmpeg4_version<6 && s->block_last_index[n]>0){

607 for(last_index=63; last_index>=0; last_index--){

608 if(block[scantable[last_index]]) break;

609 }

610 s->block_last_index[n]= last_index;

611 }else

612 last_index = s->block_last_index[n];

613 /* AC coefs */

614 last_non_zero = i - 1;

615 for (; i <= last_index; i++) {

616 j = scantable[i];

617 level = block[j];

618 if (level) {

619 run = i - last_non_zero - 1;

620 last = (i == last_index);

621 sign = 0;

622 slevel = level;

623 if (level < 0) {

624 sign = 1;

625 level = -level;

626 }

627

628 if(level<=MAX_LEVEL && run<=MAX_RUN){

629 s->ac_stats[s->mb_intra][n>3][level][run][last]++;

630 }

631

632 s->ac_stats[s->mb_intra][n > 3][40][63][0]++; //esc3 like

633

634 code = get_rl_index(rl, last, run, level);

635 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);

636 if (code == rl->n) {

637 int level1, run1;

638

639 level1 = level - rl->max_level[last][run];

640 if (level1 < 1)

641 goto esc2;

642 code = get_rl_index(rl, last, run, level1);

643 if (code == rl->n) {

644 esc2:

645 put_bits(&s->pb, 1, 0);

646 if (level > MAX_LEVEL)

647 goto esc3;

648 run1 = run - rl->max_run[last][level] - run_diff;

649 if (run1 < 0)

650 goto esc3;

651 code = get_rl_index(rl, last, run1+1, level);

652 if (s->msmpeg4_version == 4 && code == rl->n)

653 goto esc3;

654 code = get_rl_index(rl, last, run1, level);

655 if (code == rl->n) {

656 esc3:

657 /* third escape */

658 put_bits(&s->pb, 1, 0);

659 put_bits(&s->pb, 1, last);

660 if(s->msmpeg4_version>=4){

661 if(s->esc3_level_length==0){

662 s->esc3_level_length=8;

663 s->esc3_run_length= 6;

664 //ESCLVLSZ + ESCRUNSZ

665 if(s->qscale<8)

666 put_bits(&s->pb, 6 + (s->msmpeg4_version>=6), 3);

667 else

668 put_bits(&s->pb, 8, 3);

669 }

670 put_bits(&s->pb, s->esc3_run_length, run);

671 put_bits(&s->pb, 1, sign);

672 put_bits(&s->pb, s->esc3_level_length, level);

673 }else{

674 put_bits(&s->pb, 6, run);

675 put_sbits(&s->pb, 8, slevel);

676 }

677 } else {

678 /* second escape */

679 put_bits(&s->pb, 1, 1);

680 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);

681 put_bits(&s->pb, 1, sign);

682 }

683 } else {

684 /* first escape */

685 put_bits(&s->pb, 1, 1);

686 put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);

687 put_bits(&s->pb, 1, sign);

688 }

689 } else {

690 put_bits(&s->pb, 1, sign);

691 }

692 last_non_zero = i;

693 }

694 }

695 }

MpegEncContext::inter_intra_pred

int inter_intra_pred

Definition: mpegvideo.h:444

val

const char const char void * val

Definition: avisynth_c.h:771

const char * s

Definition: avisynth_c.h:768

MpegEncContext::esc3_level_length

int esc3_level_length

Definition: mpegvideo.h:440

ff_v2_dc_lum_table

uint32_t ff_v2_dc_lum_table[512][2]

Definition: msmpeg4data.c:34

PutBitContext

Definition: put_bits.h:35

ff_table_mb_non_intra

const uint32_t ff_table_mb_non_intra[128][2]

Definition: msmpeg4data.c:63

put_sbits

static void put_sbits(PutBitContext *pb, int n, int32_t value)

Definition: put_bits.h:240

mpeg4video.h

put_bits

static void put_bits(Jpeg2000EncoderContext *s, int val, int n)

put n times val bit

Definition: j2kenc.c:207

ff_table0_dc_lum

const uint32_t ff_table0_dc_lum[120][2]

Definition: msmpeg4data.c:100

mem.h

Memory handling functions.

ff_v2_dc_chroma_table

uint32_t ff_v2_dc_chroma_table[512][2]

Definition: msmpeg4data.c:35

MpegEncContext::msmpeg4_version

int msmpeg4_version

0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8

Definition: mpegvideo.h:438

AVRational::num

int num

Numerator.

Definition: rational.h:59

avpriv_align_put_bits

void avpriv_align_put_bits(PutBitContext *s)

Pad the bitstream with zeros up to the next byte boundary.

Definition: bitstream.c:48

avutil.h

Convenience header that includes libavutil's core.

MpegEncContext::min_qcoeff

int min_qcoeff

minimum encodable coefficient

Definition: mpegvideo.h:308

mpegvideo.h

mpegvideo header.

NB_RL_TABLES

#define NB_RL_TABLES

Definition: msmpeg4data.h:60

ScanTable::permutated

uint8_t permutated[64]

Definition: idctdsp.h:33

run

uint8_t run

Definition: svq3.c:206

rl_length

static uint8_t rl_length[NB_RL_TABLES][MAX_LEVEL+1][MAX_RUN+1][2]

Definition: msmpeg4enc.c:46

MpegEncContext::qscale

int qscale

QP.

Definition: mpegvideo.h:204

RLTable

RLTable.

Definition: rl.h:39

ff_msmpeg4_common_init

av_cold void ff_msmpeg4_common_init(MpegEncContext *s)

Definition: msmpeg4.c:109

ff_h263_pred_motion

int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)

Definition: h263.c:307

attributes.h

Macro definitions for various function/variable attributes.

AVCodecContext::time_base

AVRational time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...

Definition: avcodec.h:1640

block

static int16_t block[64]

Definition: dct.c:115

ff_mpeg4_clean_buffers

void ff_mpeg4_clean_buffers(MpegEncContext *s)

Definition: mpeg4video.c:45

ff_msmpeg4_encode_picture_header

void ff_msmpeg4_encode_picture_header(MpegEncContext *s, int picture_number)

Definition: msmpeg4enc.c:224

av_assert0

#define av_assert0(cond)

assert() equivalent, that is always enabled.

Definition: avassert.h:37

MpegEncContext::esc3_run_length

int esc3_run_length

Definition: mpegvideo.h:441

RLTable::max_run

int8_t * max_run[2]

encoding & decoding

Definition: rl.h:47

vc1data.h

VC-1 tables.

init_mv_table

static av_cold int init_mv_table(MVTable *tab)

Definition: msmpeg4enc.c:49

ff_v2_intra_cbpc

const uint8_t ff_v2_intra_cbpc[4][2]

Definition: msmpeg4data.c:1791

uint8_t

Definition: audio_convert.c:194

av_cold

#define av_cold

Definition: attributes.h:82

av_malloc

#define av_malloc(s)

Definition: tableprint_vlc.h:31

MpegEncContext::c_dc_scale

int c_dc_scale

Definition: mpegvideo.h:84

ff_static_rl_table_store

uint8_t ff_static_rl_table_store[NB_RL_TABLES][2][2 *MAX_RUN+MAX_LEVEL+3]

Definition: msmpeg4data.c:36

MpegEncContext::misc_bits

int misc_bits

cbp, mb_type

Definition: mpegvideo.h:352

MBAC_BITRATE

#define MBAC_BITRATE

Definition: msmpeg4.h:38

msmpeg4data.h

MSMPEG4 data tables.

MVTable

Definition: msmpeg4data.h:39

RLTable::max_level

int8_t * max_level[2]

encoding & decoding

Definition: rl.h:46

ff_dlog

#define ff_dlog(a,...)

Definition: tableprint_vlc.h:29

ff_table0_dc_chroma

const uint32_t ff_table0_dc_chroma[120][2]

Definition: msmpeg4data.c:133

MpegEncContext::mb_height

int mb_height

number of MBs horizontally & vertically

Definition: mpegvideo.h:129

size

ptrdiff_t size

Definition: opengl_enc.c:101

MpegEncContext::max_qcoeff

int max_qcoeff

maximum encodable coefficient

Definition: mpegvideo.h:309

msmpeg4_encode_dc

static void msmpeg4_encode_dc(MpegEncContext *s, int level, int n, int *dir_ptr)

Definition: msmpeg4enc.c:499

MAX_LEVEL

#define MAX_LEVEL

Definition: rl.h:36

MpegEncContext::flipflop_rounding

int flipflop_rounding

Definition: mpegvideo.h:437

find_best_tables

static void find_best_tables(MpegEncContext *s)

Definition: msmpeg4enc.c:159

MpegEncContext::i_count

int i_count

Definition: mpegvideo.h:348

get_bits_diff

static int get_bits_diff(MpegEncContext *s)

Definition: mpegvideo.h:754

MpegEncContext::last_non_b_pict_type

int last_non_b_pict_type

used for MPEG-4 gmc B-frames & ratecontrol

Definition: mpegvideo.h:215

ff_msmp4_mb_i_table

const uint16_t ff_msmp4_mb_i_table[64][2]

Definition: msmpeg4data.c:43

ff_msmpeg4_encode_mb

void ff_msmpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)

Definition: msmpeg4enc.c:376

MpegEncContext::rl_chroma_table_index

int rl_chroma_table_index

Definition: mpegvideo.h:432

AVERROR

#define AVERROR(e)

Definition: error.h:43

MpegEncContext::per_mb_rl_table

int per_mb_rl_table

Definition: mpegvideo.h:439

h263.h

rl.h

rl header.

FFMAX

#define FFMAX(a, b)

Definition: common.h:94

MpegEncContext::mb_intra

int mb_intra

Definition: mpegvideo.h:290

RLTable::n

int n

number of entries of table_vlc minus 1

Definition: rl.h:40

MpegEncContext::i_tex_bits

int i_tex_bits

Definition: mpegvideo.h:346

ff_v2_mb_type

const uint8_t ff_v2_mb_type[8][2]

Definition: msmpeg4data.c:1786

AV_PICTURE_TYPE_I

Intra.

Definition: avutil.h:274

ff_msmpeg4_pred_dc

int ff_msmpeg4_pred_dc(MpegEncContext *s, int n, int16_t **dc_val_ptr, int *dir_ptr)

Definition: msmpeg4.c:193

FFMIN

#define FFMIN(a, b)

Definition: common.h:96

MpegEncContext::mb_y

int mb_y

Definition: mpegvideo.h:288

MVTable::table_mvx

const uint8_t * table_mvx

Definition: msmpeg4data.h:43

RLTable::table_vlc

const uint16_t(* table_vlc)[2]

Definition: rl.h:42

MpegEncContext::mb_x

int mb_x

Definition: mpegvideo.h:288

MpegEncContext::width

int width

Definition: mpegvideo.h:100

MpegEncContext::skip_count

int skip_count

Definition: mpegvideo.h:351

MVTable::table_mv_bits

const uint8_t * table_mv_bits

Definition: msmpeg4data.h:42

msmpeg4.h

MpegEncContext::p_tex_bits

int p_tex_bits

Definition: mpegvideo.h:347

MpegEncContext::ac_stats

int(* ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2]

[mb_intra][isChroma][level][run][last]

Definition: mpegvideo.h:443

ff_msmpeg4_encode_init

av_cold int ff_msmpeg4_encode_init(MpegEncContext *s)

Definition: msmpeg4enc.c:121

MpegEncContext::block_last_index

int block_last_index[12]

last non zero coefficient in block

Definition: mpegvideo.h:86

int n

Definition: avisynth_c.h:684

AVCodecContext::ticks_per_frame

int ticks_per_frame

For some codecs, the time base is closer to the field rate than the frame rate.

Definition: avcodec.h:1649

ff_table1_dc_chroma

const uint32_t ff_table1_dc_chroma[120][2]

Definition: msmpeg4data.c:201

MVTable::table_mv_index

uint16_t * table_mv_index

Definition: msmpeg4data.h:45

pred

static const float pred[4]

Definition: siprdata.h:259

static const int8_t mv[256][2]

Definition: 4xm.c:77

MpegEncContext::first_slice_line

int first_slice_line

used in MPEG-4 too to handle resync markers

Definition: mpegvideo.h:436

ff_msmpeg4_encode_block

void ff_msmpeg4_encode_block(MpegEncContext *s, int16_t *block, int n)

Definition: msmpeg4enc.c:577

MpegEncContext::intra_scantable

ScanTable intra_scantable

Definition: mpegvideo.h:91

MpegEncContext::height

int height

picture size. must be a multiple of 16

Definition: mpegvideo.h:100

ff_msmpeg4_encode_ext_header

void ff_msmpeg4_encode_ext_header(MpegEncContext *s)

Definition: msmpeg4enc.c:284

MVTable::table_mv_code

const uint16_t * table_mv_code

Definition: msmpeg4data.h:41

ff_rl_init

av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])

Definition: rl.c:39

MpegEncContext::mv_bits

int mv_bits

Definition: mpegvideo.h:344

DC_MAX

#define DC_MAX

Definition: msmpeg4.h:40

ff_table1_dc_lum

const uint32_t ff_table1_dc_lum[120][2]

Definition: msmpeg4data.c:168

msmpeg4v2_encode_motion

static void msmpeg4v2_encode_motion(MpegEncContext *s, int val)

Definition: msmpeg4enc.c:343

MpegEncContext::slice_height

int slice_height

in macroblocks

Definition: mpegvideo.h:435

MpegEncContext::use_skip_mb_code

int use_skip_mb_code

Definition: mpegvideo.h:434

ff_mv_tables

MVTable ff_mv_tables[2]

Definition: msmpeg4data.c:1773

MpegEncContext::f_code

int f_code

forward MV resolution

Definition: mpegvideo.h:238

ff_h263_cbpy_tab

const uint8_t ff_h263_cbpy_tab[16][2]

Definition: h263data.c:84

ff_msmpeg4_code012

void ff_msmpeg4_code012(PutBitContext *pb, int n)

Definition: msmpeg4enc.c:70

MpegEncContext::pict_type

int pict_type

AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...

Definition: mpegvideo.h:212

II_BITRATE

#define II_BITRATE

Definition: msmpeg4.h:37

ff_rl_table

RLTable ff_rl_table[NB_RL_TABLES]

Definition: msmpeg4data.c:601

MVTable::n

int n

Definition: msmpeg4data.h:40

level

uint8_t level

Definition: svq3.c:207

MpegEncContext

MpegEncContext.

Definition: mpegvideo.h:81

MAX_RUN

#define MAX_RUN

Definition: rl.h:35

MpegEncContext::avctx

struct AVCodecContext * avctx

Definition: mpegvideo.h:98

MpegEncContext::pb

PutBitContext pb

bit output

Definition: mpegvideo.h:151

ff_msmpeg4_handle_slices

void ff_msmpeg4_handle_slices(MpegEncContext *s)

Definition: msmpeg4enc.c:330

ff_msmpeg4_encode_motion

void ff_msmpeg4_encode_motion(MpegEncContext *s, int mx, int my)

Definition: msmpeg4enc.c:297

internal.h

common internal api header.

AVRational::den

int den

Denominator.

Definition: rational.h:60

get_rl_index

static int get_rl_index(const RLTable *rl, int last, int run, int level)

Definition: rl.h:76

MpegEncContext::last_bits

int last_bits

temp var used for calculating the above vars

Definition: mpegvideo.h:353

MpegEncContext::y_dc_scale

int y_dc_scale

Definition: mpegvideo.h:84

MpegEncContext::bit_rate

int64_t bit_rate

wanted bit rate

Definition: mpegvideo.h:103

MpegEncContext::rl_table_index

int rl_table_index

Definition: mpegvideo.h:431

tab

static const struct twinvq_data tab

Definition: twinvq_data.h:11135

av_uninit

#define av_uninit(x)

Definition: attributes.h:148

MVTable::table_mvy

const uint8_t * table_mvy

Definition: msmpeg4data.h:44

MpegEncContext::inter_scantable

ScanTable inter_scantable

if inter == intra then intra should be used to reduce the cache usage

Definition: mpegvideo.h:90

ff_msmpeg4_coded_block_pred

int ff_msmpeg4_coded_block_pred(MpegEncContext *s, int n, uint8_t **coded_block_ptr)

Definition: msmpeg4.c:153

get_size_of_code

static int get_size_of_code(MpegEncContext *s, RLTable *rl, int last, int run, int level, int intra)

Definition: msmpeg4enc.c:80

MpegEncContext::mv_table_index

int mv_table_index

Definition: mpegvideo.h:430

MpegEncContext::h263_aic_dir

int h263_aic_dir

AIC direction: 0 = left, 1 = top.

Definition: mpegvideo.h:376

ff_table_inter_intra

const uint8_t ff_table_inter_intra[4][2]

Definition: msmpeg4data.c:1844

MpegEncContext::dc_table_index

int dc_table_index

Definition: mpegvideo.h:433

AV_PICTURE_TYPE_P

Predicted.

Definition: avutil.h:275

ff_mvtab

const uint8_t ff_mvtab[33][2]

Definition: h263data.c:90

put_bits.h

bitstream writer API

Generated on Sun May 13 2018 02:03:53 for FFmpeg by doxygen 1.8.6