1/* 2 * MPEG-4 encoder 3 * Copyright (c) 2000,2001 Fabrice Bellard 4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "libavutil/attributes.h" 24#include "libavutil/log.h" 25#include "libavutil/opt.h" 26#include "libavutil/thread.h" 27#include "codec_internal.h" 28#include "mpegutils.h" 29#include "mpegvideo.h" 30#include "h263.h" 31#include "h263enc.h" 32#include "mpeg4video.h" 33#include "mpeg4videodata.h" 34#include "mpeg4videoenc.h" 35#include "mpegvideoenc.h" 36#include "profiles.h" 37#include "version.h" 38 39/* The uni_DCtab_* tables below contain unified bits+length tables to encode DC 40 * differences in MPEG-4. Unified in the sense that the specification specifies 41 * this encoding in several steps. */ 42static uint8_t uni_DCtab_lum_len[512]; 43static uint8_t uni_DCtab_chrom_len[512]; 44static uint16_t uni_DCtab_lum_bits[512]; 45static uint16_t uni_DCtab_chrom_bits[512]; 46 47/* Unified encoding tables for run length encoding of coefficients. 48 * Unified in the sense that the specification specifies the encoding in several steps. */ 49static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2]; 50static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2]; 51static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2]; 52static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2]; 53 54//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level)) 55//#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64) 56#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level)) 57 58/* MPEG-4 59 * inter 60 * max level: 24/6 61 * max run: 53/63 62 * 63 * intra 64 * max level: 53/16 65 * max run: 29/41 66 */ 67 68/** 69 * Return the number of bits that encoding the 8x8 block in block would need. 70 * @param[in] block_last_index last index in scantable order that refers to a non zero element in block. 71 */ 72static inline int get_block_rate(MpegEncContext *s, int16_t block[64], 73 int block_last_index, uint8_t scantable[64]) 74{ 75 int last = 0; 76 int j; 77 int rate = 0; 78 79 for (j = 1; j <= block_last_index; j++) { 80 const int index = scantable[j]; 81 int level = block[index]; 82 if (level) { 83 level += 64; 84 if ((level & (~127)) == 0) { 85 if (j < block_last_index) 86 rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; 87 else 88 rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; 89 } else 90 rate += s->ac_esc_length; 91 92 last = j; 93 } 94 } 95 96 return rate; 97} 98 99/** 100 * Restore the ac coefficients in block that have been changed by decide_ac_pred(). 101 * This function also restores s->block_last_index. 102 * @param[in,out] block MB coefficients, these will be restored 103 * @param[in] dir ac prediction direction for each 8x8 block 104 * @param[out] st scantable for each 8x8 block 105 * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order 106 */ 107static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], 108 const int dir[6], uint8_t *st[6], 109 const int zigzag_last_index[6]) 110{ 111 int i, n; 112 memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6); 113 114 for (n = 0; n < 6; n++) { 115 int16_t *ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16; 116 117 st[n] = s->intra_scantable.permutated; 118 if (dir[n]) { 119 /* top prediction */ 120 for (i = 1; i < 8; i++) 121 block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8]; 122 } else { 123 /* left prediction */ 124 for (i = 1; i < 8; i++) 125 block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i]; 126 } 127 } 128} 129 130/** 131 * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4. 132 * This function will also update s->block_last_index and s->ac_val. 133 * @param[in,out] block MB coefficients, these will be updated if 1 is returned 134 * @param[in] dir ac prediction direction for each 8x8 block 135 * @param[out] st scantable for each 8x8 block 136 * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order 137 */ 138static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], 139 const int dir[6], uint8_t *st[6], 140 int zigzag_last_index[6]) 141{ 142 int score = 0; 143 int i, n; 144 int8_t *const qscale_table = s->current_picture.qscale_table; 145 146 memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6); 147 148 for (n = 0; n < 6; n++) { 149 int16_t *ac_val, *ac_val1; 150 151 score -= get_block_rate(s, block[n], s->block_last_index[n], 152 s->intra_scantable.permutated); 153 154 ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16; 155 ac_val1 = ac_val; 156 if (dir[n]) { 157 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; 158 /* top prediction */ 159 ac_val -= s->block_wrap[n] * 16; 160 if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) { 161 /* same qscale */ 162 for (i = 1; i < 8; i++) { 163 const int level = block[n][s->idsp.idct_permutation[i]]; 164 block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8]; 165 ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; 166 ac_val1[i + 8] = level; 167 } 168 } else { 169 /* different qscale, we must rescale */ 170 for (i = 1; i < 8; i++) { 171 const int level = block[n][s->idsp.idct_permutation[i]]; 172 block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); 173 ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; 174 ac_val1[i + 8] = level; 175 } 176 } 177 st[n] = s->intra_h_scantable.permutated; 178 } else { 179 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; 180 /* left prediction */ 181 ac_val -= 16; 182 if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) { 183 /* same qscale */ 184 for (i = 1; i < 8; i++) { 185 const int level = block[n][s->idsp.idct_permutation[i << 3]]; 186 block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i]; 187 ac_val1[i] = level; 188 ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; 189 } 190 } else { 191 /* different qscale, we must rescale */ 192 for (i = 1; i < 8; i++) { 193 const int level = block[n][s->idsp.idct_permutation[i << 3]]; 194 block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); 195 ac_val1[i] = level; 196 ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; 197 } 198 } 199 st[n] = s->intra_v_scantable.permutated; 200 } 201 202 for (i = 63; i > 0; i--) // FIXME optimize 203 if (block[n][st[n][i]]) 204 break; 205 s->block_last_index[n] = i; 206 207 score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); 208 } 209 210 if (score < 0) { 211 return 1; 212 } else { 213 restore_ac_coeffs(s, block, dir, st, zigzag_last_index); 214 return 0; 215 } 216} 217 218/** 219 * modify mb_type & qscale so that encoding is actually possible in MPEG-4 220 */ 221void ff_clean_mpeg4_qscales(MpegEncContext *s) 222{ 223 int i; 224 int8_t *const qscale_table = s->current_picture.qscale_table; 225 226 ff_clean_h263_qscales(s); 227 228 if (s->pict_type == AV_PICTURE_TYPE_B) { 229 int odd = 0; 230 /* ok, come on, this isn't funny anymore, there's more code for 231 * handling this MPEG-4 mess than for the actual adaptive quantization */ 232 233 for (i = 0; i < s->mb_num; i++) { 234 int mb_xy = s->mb_index2xy[i]; 235 odd += qscale_table[mb_xy] & 1; 236 } 237 238 if (2 * odd > s->mb_num) 239 odd = 1; 240 else 241 odd = 0; 242 243 for (i = 0; i < s->mb_num; i++) { 244 int mb_xy = s->mb_index2xy[i]; 245 if ((qscale_table[mb_xy] & 1) != odd) 246 qscale_table[mb_xy]++; 247 if (qscale_table[mb_xy] > 31) 248 qscale_table[mb_xy] = 31; 249 } 250 251 for (i = 1; i < s->mb_num; i++) { 252 int mb_xy = s->mb_index2xy[i]; 253 if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] && 254 (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) { 255 s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR; 256 } 257 } 258 } 259} 260 261/** 262 * Encode the dc value. 263 * @param n block index (0-3 are luma, 4-5 are chroma) 264 */ 265static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n) 266{ 267 /* DC will overflow if level is outside the [-255,255] range. */ 268 level += 256; 269 if (n < 4) { 270 /* luminance */ 271 put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); 272 } else { 273 /* chrominance */ 274 put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); 275 } 276} 277 278static inline int mpeg4_get_dc_length(int level, int n) 279{ 280 if (n < 4) 281 return uni_DCtab_lum_len[level + 256]; 282 else 283 return uni_DCtab_chrom_len[level + 256]; 284} 285 286/** 287 * Encode an 8x8 block. 288 * @param n block index (0-3 are luma, 4-5 are chroma) 289 */ 290static inline void mpeg4_encode_block(MpegEncContext *s, 291 int16_t *block, int n, int intra_dc, 292 uint8_t *scan_table, PutBitContext *dc_pb, 293 PutBitContext *ac_pb) 294{ 295 int i, last_non_zero; 296 uint32_t *bits_tab; 297 uint8_t *len_tab; 298 const int last_index = s->block_last_index[n]; 299 300 if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away 301 /* MPEG-4 based DC predictor */ 302 mpeg4_encode_dc(dc_pb, intra_dc, n); 303 if (last_index < 1) 304 return; 305 i = 1; 306 bits_tab = uni_mpeg4_intra_rl_bits; 307 len_tab = uni_mpeg4_intra_rl_len; 308 } else { 309 if (last_index < 0) 310 return; 311 i = 0; 312 bits_tab = uni_mpeg4_inter_rl_bits; 313 len_tab = uni_mpeg4_inter_rl_len; 314 } 315 316 /* AC coefs */ 317 last_non_zero = i - 1; 318 for (; i < last_index; i++) { 319 int level = block[scan_table[i]]; 320 if (level) { 321 int run = i - last_non_zero - 1; 322 level += 64; 323 if ((level & (~127)) == 0) { 324 const int index = UNI_MPEG4_ENC_INDEX(0, run, level); 325 put_bits(ac_pb, len_tab[index], bits_tab[index]); 326 } else { // ESC3 327 put_bits(ac_pb, 328 7 + 2 + 1 + 6 + 1 + 12 + 1, 329 (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) + 330 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); 331 } 332 last_non_zero = i; 333 } 334 } 335 /* if (i <= last_index) */ { 336 int level = block[scan_table[i]]; 337 int run = i - last_non_zero - 1; 338 level += 64; 339 if ((level & (~127)) == 0) { 340 const int index = UNI_MPEG4_ENC_INDEX(1, run, level); 341 put_bits(ac_pb, len_tab[index], bits_tab[index]); 342 } else { // ESC3 343 put_bits(ac_pb, 344 7 + 2 + 1 + 6 + 1 + 12 + 1, 345 (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) + 346 (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); 347 } 348 } 349} 350 351static int mpeg4_get_block_length(MpegEncContext *s, 352 int16_t *block, int n, 353 int intra_dc, uint8_t *scan_table) 354{ 355 int i, last_non_zero; 356 uint8_t *len_tab; 357 const int last_index = s->block_last_index[n]; 358 int len = 0; 359 360 if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away 361 /* MPEG-4 based DC predictor */ 362 len += mpeg4_get_dc_length(intra_dc, n); 363 if (last_index < 1) 364 return len; 365 i = 1; 366 len_tab = uni_mpeg4_intra_rl_len; 367 } else { 368 if (last_index < 0) 369 return 0; 370 i = 0; 371 len_tab = uni_mpeg4_inter_rl_len; 372 } 373 374 /* AC coefs */ 375 last_non_zero = i - 1; 376 for (; i < last_index; i++) { 377 int level = block[scan_table[i]]; 378 if (level) { 379 int run = i - last_non_zero - 1; 380 level += 64; 381 if ((level & (~127)) == 0) { 382 const int index = UNI_MPEG4_ENC_INDEX(0, run, level); 383 len += len_tab[index]; 384 } else { // ESC3 385 len += 7 + 2 + 1 + 6 + 1 + 12 + 1; 386 } 387 last_non_zero = i; 388 } 389 } 390 /* if (i <= last_index) */ { 391 int level = block[scan_table[i]]; 392 int run = i - last_non_zero - 1; 393 level += 64; 394 if ((level & (~127)) == 0) { 395 const int index = UNI_MPEG4_ENC_INDEX(1, run, level); 396 len += len_tab[index]; 397 } else { // ESC3 398 len += 7 + 2 + 1 + 6 + 1 + 12 + 1; 399 } 400 } 401 402 return len; 403} 404 405static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], 406 int intra_dc[6], uint8_t **scan_table, 407 PutBitContext *dc_pb, 408 PutBitContext *ac_pb) 409{ 410 int i; 411 412 if (scan_table) { 413 if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) { 414 for (i = 0; i < 6; i++) 415 skip_put_bits(&s->pb, 416 mpeg4_get_block_length(s, block[i], i, 417 intra_dc[i], scan_table[i])); 418 } else { 419 /* encode each block */ 420 for (i = 0; i < 6; i++) 421 mpeg4_encode_block(s, block[i], i, 422 intra_dc[i], scan_table[i], dc_pb, ac_pb); 423 } 424 } else { 425 if (s->avctx->flags2 & AV_CODEC_FLAG2_NO_OUTPUT) { 426 for (i = 0; i < 6; i++) 427 skip_put_bits(&s->pb, 428 mpeg4_get_block_length(s, block[i], i, 0, 429 s->intra_scantable.permutated)); 430 } else { 431 /* encode each block */ 432 for (i = 0; i < 6; i++) 433 mpeg4_encode_block(s, block[i], i, 0, 434 s->intra_scantable.permutated, dc_pb, ac_pb); 435 } 436 } 437} 438 439static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64], 440 int motion_x, int motion_y, int mb_type) 441{ 442 int cbp = 0, i; 443 444 if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { 445 int score = 0; 446 const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); 447 448 for (i = 0; i < 6; i++) { 449 if (s->coded_score[i] < 0) { 450 score += s->coded_score[i]; 451 cbp |= 1 << (5 - i); 452 } 453 } 454 455 if (cbp) { 456 int zero_score = -6; 457 if ((motion_x | motion_y | s->dquant | mb_type) == 0) 458 zero_score -= 4; // 2 * MV + mb_type + cbp bit 459 460 zero_score *= lambda; 461 if (zero_score <= score) 462 cbp = 0; 463 } 464 465 for (i = 0; i < 6; i++) { 466 if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) { 467 s->block_last_index[i] = -1; 468 s->bdsp.clear_block(s->block[i]); 469 } 470 } 471 } else { 472 for (i = 0; i < 6; i++) { 473 if (s->block_last_index[i] >= 0) 474 cbp |= 1 << (5 - i); 475 } 476 } 477 return cbp; 478} 479 480// FIXME this is duplicated to h263.c 481static const int dquant_code[5] = { 1, 0, 9, 2, 3 }; 482 483void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], 484 int motion_x, int motion_y) 485{ 486 int cbpc, cbpy, pred_x, pred_y; 487 PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; 488 PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; 489 PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; 490 const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; 491 492 if (!s->mb_intra) { 493 int i, cbp; 494 495 if (s->pict_type == AV_PICTURE_TYPE_B) { 496 /* convert from mv_dir to type */ 497 static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 }; 498 int mb_type = mb_type_table[s->mv_dir]; 499 500 if (s->mb_x == 0) { 501 for (i = 0; i < 2; i++) 502 s->last_mv[i][0][0] = 503 s->last_mv[i][0][1] = 504 s->last_mv[i][1][0] = 505 s->last_mv[i][1][1] = 0; 506 } 507 508 av_assert2(s->dquant >= -2 && s->dquant <= 2); 509 av_assert2((s->dquant & 1) == 0); 510 av_assert2(mb_type >= 0); 511 512 /* nothing to do if this MB was skipped in the next P-frame */ 513 if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ... 514 s->skip_count++; 515 s->mv[0][0][0] = 516 s->mv[0][0][1] = 517 s->mv[1][0][0] = 518 s->mv[1][0][1] = 0; 519 s->mv_dir = MV_DIR_FORWARD; // doesn't matter 520 s->qscale -= s->dquant; 521// s->mb_skipped = 1; 522 523 return; 524 } 525 526 cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type); 527 528 if ((cbp | motion_x | motion_y | mb_type) == 0) { 529 /* direct MB with MV={0,0} */ 530 av_assert2(s->dquant == 0); 531 532 put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ 533 534 if (interleaved_stats) { 535 s->misc_bits++; 536 s->last_bits++; 537 } 538 s->skip_count++; 539 return; 540 } 541 542 put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ 543 put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge 544 put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :) 545 if (cbp) 546 put_bits(&s->pb, 6, cbp); 547 548 if (cbp && mb_type) { 549 if (s->dquant) 550 put_bits(&s->pb, 2, (s->dquant >> 2) + 3); 551 else 552 put_bits(&s->pb, 1, 0); 553 } else 554 s->qscale -= s->dquant; 555 556 if (!s->progressive_sequence) { 557 if (cbp) 558 put_bits(&s->pb, 1, s->interlaced_dct); 559 if (mb_type) // not direct mode 560 put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); 561 } 562 563 if (interleaved_stats) 564 s->misc_bits += get_bits_diff(s); 565 566 if (!mb_type) { 567 av_assert2(s->mv_dir & MV_DIRECT); 568 ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); 569 } else { 570 av_assert2(mb_type > 0 && mb_type < 4); 571 if (s->mv_type != MV_TYPE_FIELD) { 572 if (s->mv_dir & MV_DIR_FORWARD) { 573 ff_h263_encode_motion_vector(s, 574 s->mv[0][0][0] - s->last_mv[0][0][0], 575 s->mv[0][0][1] - s->last_mv[0][0][1], 576 s->f_code); 577 s->last_mv[0][0][0] = 578 s->last_mv[0][1][0] = s->mv[0][0][0]; 579 s->last_mv[0][0][1] = 580 s->last_mv[0][1][1] = s->mv[0][0][1]; 581 } 582 if (s->mv_dir & MV_DIR_BACKWARD) { 583 ff_h263_encode_motion_vector(s, 584 s->mv[1][0][0] - s->last_mv[1][0][0], 585 s->mv[1][0][1] - s->last_mv[1][0][1], 586 s->b_code); 587 s->last_mv[1][0][0] = 588 s->last_mv[1][1][0] = s->mv[1][0][0]; 589 s->last_mv[1][0][1] = 590 s->last_mv[1][1][1] = s->mv[1][0][1]; 591 } 592 } else { 593 if (s->mv_dir & MV_DIR_FORWARD) { 594 put_bits(&s->pb, 1, s->field_select[0][0]); 595 put_bits(&s->pb, 1, s->field_select[0][1]); 596 } 597 if (s->mv_dir & MV_DIR_BACKWARD) { 598 put_bits(&s->pb, 1, s->field_select[1][0]); 599 put_bits(&s->pb, 1, s->field_select[1][1]); 600 } 601 if (s->mv_dir & MV_DIR_FORWARD) { 602 for (i = 0; i < 2; i++) { 603 ff_h263_encode_motion_vector(s, 604 s->mv[0][i][0] - s->last_mv[0][i][0], 605 s->mv[0][i][1] - s->last_mv[0][i][1] / 2, 606 s->f_code); 607 s->last_mv[0][i][0] = s->mv[0][i][0]; 608 s->last_mv[0][i][1] = s->mv[0][i][1] * 2; 609 } 610 } 611 if (s->mv_dir & MV_DIR_BACKWARD) { 612 for (i = 0; i < 2; i++) { 613 ff_h263_encode_motion_vector(s, 614 s->mv[1][i][0] - s->last_mv[1][i][0], 615 s->mv[1][i][1] - s->last_mv[1][i][1] / 2, 616 s->b_code); 617 s->last_mv[1][i][0] = s->mv[1][i][0]; 618 s->last_mv[1][i][1] = s->mv[1][i][1] * 2; 619 } 620 } 621 } 622 } 623 624 if (interleaved_stats) 625 s->mv_bits += get_bits_diff(s); 626 627 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); 628 629 if (interleaved_stats) 630 s->p_tex_bits += get_bits_diff(s); 631 } else { /* s->pict_type==AV_PICTURE_TYPE_B */ 632 cbp = get_p_cbp(s, block, motion_x, motion_y); 633 634 if ((cbp | motion_x | motion_y | s->dquant) == 0 && 635 s->mv_type == MV_TYPE_16X16) { 636 /* Check if the B-frames can skip it too, as we must skip it 637 * if we skip here why didn't they just compress 638 * the skip-mb bits instead of reusing them ?! */ 639 if (s->max_b_frames > 0) { 640 int i; 641 int x, y, offset; 642 uint8_t *p_pic; 643 644 x = s->mb_x * 16; 645 y = s->mb_y * 16; 646 647 offset = x + y * s->linesize; 648 p_pic = s->new_picture->data[0] + offset; 649 650 s->mb_skipped = 1; 651 for (i = 0; i < s->max_b_frames; i++) { 652 uint8_t *b_pic; 653 int diff; 654 Picture *pic = s->reordered_input_picture[i + 1]; 655 656 if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B) 657 break; 658 659 b_pic = pic->f->data[0] + offset; 660 if (!pic->shared) 661 b_pic += INPLACE_OFFSET; 662 663 if (x + 16 > s->width || y + 16 > s->height) { 664 int x1, y1; 665 int xe = FFMIN(16, s->width - x); 666 int ye = FFMIN(16, s->height - y); 667 diff = 0; 668 for (y1 = 0; y1 < ye; y1++) { 669 for (x1 = 0; x1 < xe; x1++) { 670 diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]); 671 } 672 } 673 diff = diff * 256 / (xe * ye); 674 } else { 675 diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16); 676 } 677 if (diff > s->qscale * 70) { // FIXME check that 70 is optimal 678 s->mb_skipped = 0; 679 break; 680 } 681 } 682 } else 683 s->mb_skipped = 1; 684 685 if (s->mb_skipped == 1) { 686 /* skip macroblock */ 687 put_bits(&s->pb, 1, 1); 688 689 if (interleaved_stats) { 690 s->misc_bits++; 691 s->last_bits++; 692 } 693 s->skip_count++; 694 695 return; 696 } 697 } 698 699 put_bits(&s->pb, 1, 0); /* mb coded */ 700 cbpc = cbp & 3; 701 cbpy = cbp >> 2; 702 cbpy ^= 0xf; 703 if (s->mv_type == MV_TYPE_16X16) { 704 if (s->dquant) 705 cbpc += 8; 706 put_bits(&s->pb, 707 ff_h263_inter_MCBPC_bits[cbpc], 708 ff_h263_inter_MCBPC_code[cbpc]); 709 710 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 711 if (s->dquant) 712 put_bits(pb2, 2, dquant_code[s->dquant + 2]); 713 714 if (!s->progressive_sequence) { 715 if (cbp) 716 put_bits(pb2, 1, s->interlaced_dct); 717 put_bits(pb2, 1, 0); 718 } 719 720 if (interleaved_stats) 721 s->misc_bits += get_bits_diff(s); 722 723 /* motion vectors: 16x16 mode */ 724 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); 725 726 ff_h263_encode_motion_vector(s, 727 motion_x - pred_x, 728 motion_y - pred_y, 729 s->f_code); 730 } else if (s->mv_type == MV_TYPE_FIELD) { 731 if (s->dquant) 732 cbpc += 8; 733 put_bits(&s->pb, 734 ff_h263_inter_MCBPC_bits[cbpc], 735 ff_h263_inter_MCBPC_code[cbpc]); 736 737 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 738 if (s->dquant) 739 put_bits(pb2, 2, dquant_code[s->dquant + 2]); 740 741 av_assert2(!s->progressive_sequence); 742 if (cbp) 743 put_bits(pb2, 1, s->interlaced_dct); 744 put_bits(pb2, 1, 1); 745 746 if (interleaved_stats) 747 s->misc_bits += get_bits_diff(s); 748 749 /* motion vectors: 16x8 interlaced mode */ 750 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); 751 pred_y /= 2; 752 753 put_bits(&s->pb, 1, s->field_select[0][0]); 754 put_bits(&s->pb, 1, s->field_select[0][1]); 755 756 ff_h263_encode_motion_vector(s, 757 s->mv[0][0][0] - pred_x, 758 s->mv[0][0][1] - pred_y, 759 s->f_code); 760 ff_h263_encode_motion_vector(s, 761 s->mv[0][1][0] - pred_x, 762 s->mv[0][1][1] - pred_y, 763 s->f_code); 764 } else { 765 av_assert2(s->mv_type == MV_TYPE_8X8); 766 put_bits(&s->pb, 767 ff_h263_inter_MCBPC_bits[cbpc + 16], 768 ff_h263_inter_MCBPC_code[cbpc + 16]); 769 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 770 771 if (!s->progressive_sequence && cbp) 772 put_bits(pb2, 1, s->interlaced_dct); 773 774 if (interleaved_stats) 775 s->misc_bits += get_bits_diff(s); 776 777 for (i = 0; i < 4; i++) { 778 /* motion vectors: 8x8 mode*/ 779 ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); 780 781 ff_h263_encode_motion_vector(s, 782 s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x, 783 s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y, 784 s->f_code); 785 } 786 } 787 788 if (interleaved_stats) 789 s->mv_bits += get_bits_diff(s); 790 791 mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); 792 793 if (interleaved_stats) 794 s->p_tex_bits += get_bits_diff(s); 795 } 796 } else { 797 int cbp; 798 int dc_diff[6]; // dc values with the dc prediction subtracted 799 int dir[6]; // prediction direction 800 int zigzag_last_index[6]; 801 uint8_t *scan_table[6]; 802 int i; 803 804 for (i = 0; i < 6; i++) 805 dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); 806 807 if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) { 808 s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); 809 } else { 810 for (i = 0; i < 6; i++) 811 scan_table[i] = s->intra_scantable.permutated; 812 } 813 814 /* compute cbp */ 815 cbp = 0; 816 for (i = 0; i < 6; i++) 817 if (s->block_last_index[i] >= 1) 818 cbp |= 1 << (5 - i); 819 820 cbpc = cbp & 3; 821 if (s->pict_type == AV_PICTURE_TYPE_I) { 822 if (s->dquant) 823 cbpc += 4; 824 put_bits(&s->pb, 825 ff_h263_intra_MCBPC_bits[cbpc], 826 ff_h263_intra_MCBPC_code[cbpc]); 827 } else { 828 if (s->dquant) 829 cbpc += 8; 830 put_bits(&s->pb, 1, 0); /* mb coded */ 831 put_bits(&s->pb, 832 ff_h263_inter_MCBPC_bits[cbpc + 4], 833 ff_h263_inter_MCBPC_code[cbpc + 4]); 834 } 835 put_bits(pb2, 1, s->ac_pred); 836 cbpy = cbp >> 2; 837 put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); 838 if (s->dquant) 839 put_bits(dc_pb, 2, dquant_code[s->dquant + 2]); 840 841 if (!s->progressive_sequence) 842 put_bits(dc_pb, 1, s->interlaced_dct); 843 844 if (interleaved_stats) 845 s->misc_bits += get_bits_diff(s); 846 847 mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); 848 849 if (interleaved_stats) 850 s->i_tex_bits += get_bits_diff(s); 851 s->i_count++; 852 853 /* restore ac coeffs & last_index stuff 854 * if we messed them up with the prediction */ 855 if (s->ac_pred) 856 restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); 857 } 858} 859 860/** 861 * add MPEG-4 stuffing bits (01...1) 862 */ 863void ff_mpeg4_stuffing(PutBitContext *pbc) 864{ 865 int length; 866 put_bits(pbc, 1, 0); 867 length = (-put_bits_count(pbc)) & 7; 868 if (length) 869 put_bits(pbc, length, (1 << length) - 1); 870} 871 872/* must be called before writing the header */ 873void ff_set_mpeg4_time(MpegEncContext *s) 874{ 875 if (s->pict_type == AV_PICTURE_TYPE_B) { 876 ff_mpeg4_init_direct_mv(s); 877 } else { 878 s->last_time_base = s->time_base; 879 s->time_base = FFUDIV(s->time, s->avctx->time_base.den); 880 } 881} 882 883static void mpeg4_encode_gop_header(MpegEncContext *s) 884{ 885 int64_t hours, minutes, seconds; 886 int64_t time; 887 888 put_bits(&s->pb, 16, 0); 889 put_bits(&s->pb, 16, GOP_STARTCODE); 890 891 time = s->current_picture_ptr->f->pts; 892 if (s->reordered_input_picture[1]) 893 time = FFMIN(time, s->reordered_input_picture[1]->f->pts); 894 time = time * s->avctx->time_base.num; 895 s->last_time_base = FFUDIV(time, s->avctx->time_base.den); 896 897 seconds = FFUDIV(time, s->avctx->time_base.den); 898 minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60); 899 hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60); 900 hours = FFUMOD(hours , 24); 901 902 put_bits(&s->pb, 5, hours); 903 put_bits(&s->pb, 6, minutes); 904 put_bits(&s->pb, 1, 1); 905 put_bits(&s->pb, 6, seconds); 906 907 put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP)); 908 put_bits(&s->pb, 1, 0); // broken link == NO 909 910 ff_mpeg4_stuffing(&s->pb); 911} 912 913static void mpeg4_encode_visual_object_header(MpegEncContext *s) 914{ 915 int profile_and_level_indication; 916 int vo_ver_id; 917 918 if (s->avctx->profile != FF_PROFILE_UNKNOWN) { 919 profile_and_level_indication = s->avctx->profile << 4; 920 } else if (s->max_b_frames || s->quarter_sample) { 921 profile_and_level_indication = 0xF0; // adv simple 922 } else { 923 profile_and_level_indication = 0x00; // simple 924 } 925 926 if (s->avctx->level != FF_LEVEL_UNKNOWN) 927 profile_and_level_indication |= s->avctx->level; 928 else 929 profile_and_level_indication |= 1; // level 1 930 931 if (profile_and_level_indication >> 4 == 0xF) 932 vo_ver_id = 5; 933 else 934 vo_ver_id = 1; 935 936 // FIXME levels 937 938 put_bits(&s->pb, 16, 0); 939 put_bits(&s->pb, 16, VOS_STARTCODE); 940 941 put_bits(&s->pb, 8, profile_and_level_indication); 942 943 put_bits(&s->pb, 16, 0); 944 put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); 945 946 put_bits(&s->pb, 1, 1); 947 put_bits(&s->pb, 4, vo_ver_id); 948 put_bits(&s->pb, 3, 1); // priority 949 950 put_bits(&s->pb, 4, 1); // visual obj type== video obj 951 952 put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME 953 954 ff_mpeg4_stuffing(&s->pb); 955} 956 957static void mpeg4_encode_vol_header(MpegEncContext *s, 958 int vo_number, 959 int vol_number) 960{ 961 int vo_ver_id, vo_type, aspect_ratio_info; 962 963 if (s->max_b_frames || s->quarter_sample) { 964 vo_ver_id = 5; 965 vo_type = ADV_SIMPLE_VO_TYPE; 966 } else { 967 vo_ver_id = 1; 968 vo_type = SIMPLE_VO_TYPE; 969 } 970 971 put_bits(&s->pb, 16, 0); 972 put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ 973 put_bits(&s->pb, 16, 0); 974 put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ 975 976 put_bits(&s->pb, 1, 0); /* random access vol */ 977 put_bits(&s->pb, 8, vo_type); /* video obj type indication */ 978 if (s->workaround_bugs & FF_BUG_MS) { 979 put_bits(&s->pb, 1, 0); /* is obj layer id= no */ 980 } else { 981 put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ 982 put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ 983 put_bits(&s->pb, 3, 1); /* is obj layer priority */ 984 } 985 986 aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); 987 988 put_bits(&s->pb, 4, aspect_ratio_info); /* aspect ratio info */ 989 if (aspect_ratio_info == FF_ASPECT_EXTENDED) { 990 av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den, 991 s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255); 992 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); 993 put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); 994 } 995 996 if (s->workaround_bugs & FF_BUG_MS) { 997 put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ 998 } else { 999 put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ 1000 put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ 1001 put_bits(&s->pb, 1, s->low_delay); 1002 put_bits(&s->pb, 1, 0); /* vbv parameters= no */ 1003 } 1004 1005 put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ 1006 put_bits(&s->pb, 1, 1); /* marker bit */ 1007 1008 put_bits(&s->pb, 16, s->avctx->time_base.den); 1009 if (s->time_increment_bits < 1) 1010 s->time_increment_bits = 1; 1011 put_bits(&s->pb, 1, 1); /* marker bit */ 1012 put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ 1013 put_bits(&s->pb, 1, 1); /* marker bit */ 1014 put_bits(&s->pb, 13, s->width); /* vol width */ 1015 put_bits(&s->pb, 1, 1); /* marker bit */ 1016 put_bits(&s->pb, 13, s->height); /* vol height */ 1017 put_bits(&s->pb, 1, 1); /* marker bit */ 1018 put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); 1019 put_bits(&s->pb, 1, 1); /* obmc disable */ 1020 if (vo_ver_id == 1) 1021 put_bits(&s->pb, 1, 0); /* sprite enable */ 1022 else 1023 put_bits(&s->pb, 2, 0); /* sprite enable */ 1024 1025 put_bits(&s->pb, 1, 0); /* not 8 bit == false */ 1026 put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */ 1027 1028 if (s->mpeg_quant) { 1029 ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); 1030 ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); 1031 } 1032 1033 if (vo_ver_id != 1) 1034 put_bits(&s->pb, 1, s->quarter_sample); 1035 put_bits(&s->pb, 1, 1); /* complexity estimation disable */ 1036 put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */ 1037 put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); 1038 if (s->data_partitioning) 1039 put_bits(&s->pb, 1, 0); /* no rvlc */ 1040 1041 if (vo_ver_id != 1) { 1042 put_bits(&s->pb, 1, 0); /* newpred */ 1043 put_bits(&s->pb, 1, 0); /* reduced res vop */ 1044 } 1045 put_bits(&s->pb, 1, 0); /* scalability */ 1046 1047 ff_mpeg4_stuffing(&s->pb); 1048 1049 /* user data */ 1050 if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) { 1051 put_bits(&s->pb, 16, 0); 1052 put_bits(&s->pb, 16, 0x1B2); /* user_data */ 1053 ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0); 1054 } 1055} 1056 1057/* write MPEG-4 VOP header */ 1058int ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number) 1059{ 1060 uint64_t time_incr; 1061 int64_t time_div, time_mod; 1062 1063 if (s->pict_type == AV_PICTURE_TYPE_I) { 1064 if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) { 1065 if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy 1066 mpeg4_encode_visual_object_header(s); 1067 if (s->avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy 1068 mpeg4_encode_vol_header(s, 0, 0); 1069 } 1070 if (!(s->workaround_bugs & FF_BUG_MS)) 1071 mpeg4_encode_gop_header(s); 1072 } 1073 1074 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; 1075 1076 put_bits(&s->pb, 16, 0); /* vop header */ 1077 put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ 1078 put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ 1079 1080 time_div = FFUDIV(s->time, s->avctx->time_base.den); 1081 time_mod = FFUMOD(s->time, s->avctx->time_base.den); 1082 time_incr = time_div - s->last_time_base; 1083 1084 // This limits the frame duration to max 1 hour 1085 if (time_incr > 3600) { 1086 av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr); 1087 return AVERROR(EINVAL); 1088 } 1089 while (time_incr--) 1090 put_bits(&s->pb, 1, 1); 1091 1092 put_bits(&s->pb, 1, 0); 1093 1094 put_bits(&s->pb, 1, 1); /* marker */ 1095 put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ 1096 put_bits(&s->pb, 1, 1); /* marker */ 1097 put_bits(&s->pb, 1, 1); /* vop coded */ 1098 if (s->pict_type == AV_PICTURE_TYPE_P) { 1099 put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ 1100 } 1101 put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ 1102 if (!s->progressive_sequence) { 1103 put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first); 1104 put_bits(&s->pb, 1, s->alternate_scan); 1105 } 1106 // FIXME sprite stuff 1107 1108 put_bits(&s->pb, 5, s->qscale); 1109 1110 if (s->pict_type != AV_PICTURE_TYPE_I) 1111 put_bits(&s->pb, 3, s->f_code); /* fcode_for */ 1112 if (s->pict_type == AV_PICTURE_TYPE_B) 1113 put_bits(&s->pb, 3, s->b_code); /* fcode_back */ 1114 1115 return 0; 1116} 1117 1118static av_cold void init_uni_dc_tab(void) 1119{ 1120 int level, uni_code, uni_len; 1121 1122 for (level = -256; level < 256; level++) { 1123 int size, v, l; 1124 /* find number of bits */ 1125 size = 0; 1126 v = abs(level); 1127 while (v) { 1128 v >>= 1; 1129 size++; 1130 } 1131 1132 if (level < 0) 1133 l = (-level) ^ ((1 << size) - 1); 1134 else 1135 l = level; 1136 1137 /* luminance */ 1138 uni_code = ff_mpeg4_DCtab_lum[size][0]; 1139 uni_len = ff_mpeg4_DCtab_lum[size][1]; 1140 1141 if (size > 0) { 1142 uni_code <<= size; 1143 uni_code |= l; 1144 uni_len += size; 1145 if (size > 8) { 1146 uni_code <<= 1; 1147 uni_code |= 1; 1148 uni_len++; 1149 } 1150 } 1151 uni_DCtab_lum_bits[level + 256] = uni_code; 1152 uni_DCtab_lum_len[level + 256] = uni_len; 1153 1154 /* chrominance */ 1155 uni_code = ff_mpeg4_DCtab_chrom[size][0]; 1156 uni_len = ff_mpeg4_DCtab_chrom[size][1]; 1157 1158 if (size > 0) { 1159 uni_code <<= size; 1160 uni_code |= l; 1161 uni_len += size; 1162 if (size > 8) { 1163 uni_code <<= 1; 1164 uni_code |= 1; 1165 uni_len++; 1166 } 1167 } 1168 uni_DCtab_chrom_bits[level + 256] = uni_code; 1169 uni_DCtab_chrom_len[level + 256] = uni_len; 1170 } 1171} 1172 1173static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, 1174 uint8_t *len_tab) 1175{ 1176 int slevel, run, last; 1177 1178 av_assert0(MAX_LEVEL >= 64); 1179 av_assert0(MAX_RUN >= 63); 1180 1181 for (slevel = -64; slevel < 64; slevel++) { 1182 if (slevel == 0) 1183 continue; 1184 for (run = 0; run < 64; run++) { 1185 for (last = 0; last <= 1; last++) { 1186 const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64); 1187 int level = slevel < 0 ? -slevel : slevel; 1188 int sign = slevel < 0 ? 1 : 0; 1189 int bits, len, code; 1190 int level1, run1; 1191 1192 len_tab[index] = 100; 1193 1194 /* ESC0 */ 1195 code = get_rl_index(rl, last, run, level); 1196 bits = rl->table_vlc[code][0]; 1197 len = rl->table_vlc[code][1]; 1198 bits = bits * 2 + sign; 1199 len++; 1200 1201 if (code != rl->n && len < len_tab[index]) { 1202 bits_tab[index] = bits; 1203 len_tab[index] = len; 1204 } 1205 /* ESC1 */ 1206 bits = rl->table_vlc[rl->n][0]; 1207 len = rl->table_vlc[rl->n][1]; 1208 bits = bits * 2; 1209 len++; // esc1 1210 level1 = level - rl->max_level[last][run]; 1211 if (level1 > 0) { 1212 code = get_rl_index(rl, last, run, level1); 1213 bits <<= rl->table_vlc[code][1]; 1214 len += rl->table_vlc[code][1]; 1215 bits += rl->table_vlc[code][0]; 1216 bits = bits * 2 + sign; 1217 len++; 1218 1219 if (code != rl->n && len < len_tab[index]) { 1220 bits_tab[index] = bits; 1221 len_tab[index] = len; 1222 } 1223 } 1224 /* ESC2 */ 1225 bits = rl->table_vlc[rl->n][0]; 1226 len = rl->table_vlc[rl->n][1]; 1227 bits = bits * 4 + 2; 1228 len += 2; // esc2 1229 run1 = run - rl->max_run[last][level] - 1; 1230 if (run1 >= 0) { 1231 code = get_rl_index(rl, last, run1, level); 1232 bits <<= rl->table_vlc[code][1]; 1233 len += rl->table_vlc[code][1]; 1234 bits += rl->table_vlc[code][0]; 1235 bits = bits * 2 + sign; 1236 len++; 1237 1238 if (code != rl->n && len < len_tab[index]) { 1239 bits_tab[index] = bits; 1240 len_tab[index] = len; 1241 } 1242 } 1243 /* ESC3 */ 1244 bits = rl->table_vlc[rl->n][0]; 1245 len = rl->table_vlc[rl->n][1]; 1246 bits = bits * 4 + 3; 1247 len += 2; // esc3 1248 bits = bits * 2 + last; 1249 len++; 1250 bits = bits * 64 + run; 1251 len += 6; 1252 bits = bits * 2 + 1; 1253 len++; // marker 1254 bits = bits * 4096 + (slevel & 0xfff); 1255 len += 12; 1256 bits = bits * 2 + 1; 1257 len++; // marker 1258 1259 if (len < len_tab[index]) { 1260 bits_tab[index] = bits; 1261 len_tab[index] = len; 1262 } 1263 } 1264 } 1265 } 1266} 1267 1268static av_cold void mpeg4_encode_init_static(void) 1269{ 1270 init_uni_dc_tab(); 1271 1272 ff_mpeg4_init_rl_intra(); 1273 1274 init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); 1275 init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); 1276} 1277 1278static av_cold int encode_init(AVCodecContext *avctx) 1279{ 1280 static AVOnce init_static_once = AV_ONCE_INIT; 1281 MpegEncContext *s = avctx->priv_data; 1282 int ret; 1283 1284 if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) { 1285 av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n"); 1286 return AVERROR(EINVAL); 1287 } 1288 1289 if ((ret = ff_mpv_encode_init(avctx)) < 0) 1290 return ret; 1291 1292 ff_thread_once(&init_static_once, mpeg4_encode_init_static); 1293 1294 s->min_qcoeff = -2048; 1295 s->max_qcoeff = 2047; 1296 s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; 1297 s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64; 1298 s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; 1299 s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64; 1300 s->luma_dc_vlc_length = uni_DCtab_lum_len; 1301 s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1; 1302 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; 1303 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; 1304 1305 if (s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) { 1306 s->avctx->extradata = av_malloc(1024); 1307 if (!s->avctx->extradata) 1308 return AVERROR(ENOMEM); 1309 init_put_bits(&s->pb, s->avctx->extradata, 1024); 1310 1311 if (!(s->workaround_bugs & FF_BUG_MS)) 1312 mpeg4_encode_visual_object_header(s); 1313 mpeg4_encode_vol_header(s, 0, 0); 1314 1315// ff_mpeg4_stuffing(&s->pb); ? 1316 flush_put_bits(&s->pb); 1317 s->avctx->extradata_size = put_bytes_output(&s->pb); 1318 } 1319 return 0; 1320} 1321 1322void ff_mpeg4_init_partitions(MpegEncContext *s) 1323{ 1324 uint8_t *start = put_bits_ptr(&s->pb); 1325 uint8_t *end = s->pb.buf_end; 1326 int size = end - start; 1327 int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start; 1328 int tex_size = (size - 2 * pb_size) & (~3); 1329 1330 set_put_bits_buffer_size(&s->pb, pb_size); 1331 init_put_bits(&s->tex_pb, start + pb_size, tex_size); 1332 init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size); 1333} 1334 1335void ff_mpeg4_merge_partitions(MpegEncContext *s) 1336{ 1337 const int pb2_len = put_bits_count(&s->pb2); 1338 const int tex_pb_len = put_bits_count(&s->tex_pb); 1339 const int bits = put_bits_count(&s->pb); 1340 1341 if (s->pict_type == AV_PICTURE_TYPE_I) { 1342 put_bits(&s->pb, 19, DC_MARKER); 1343 s->misc_bits += 19 + pb2_len + bits - s->last_bits; 1344 s->i_tex_bits += tex_pb_len; 1345 } else { 1346 put_bits(&s->pb, 17, MOTION_MARKER); 1347 s->misc_bits += 17 + pb2_len; 1348 s->mv_bits += bits - s->last_bits; 1349 s->p_tex_bits += tex_pb_len; 1350 } 1351 1352 flush_put_bits(&s->pb2); 1353 flush_put_bits(&s->tex_pb); 1354 1355 set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); 1356 ff_copy_bits(&s->pb, s->pb2.buf, pb2_len); 1357 ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); 1358 s->last_bits = put_bits_count(&s->pb); 1359} 1360 1361void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) 1362{ 1363 int mb_num_bits = av_log2(s->mb_num - 1) + 1; 1364 1365 put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); 1366 put_bits(&s->pb, 1, 1); 1367 1368 put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width); 1369 put_bits(&s->pb, s->quant_precision, s->qscale); 1370 put_bits(&s->pb, 1, 0); /* no HEC */ 1371} 1372 1373#define OFFSET(x) offsetof(MpegEncContext, x) 1374#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 1375static const AVOption options[] = { 1376 { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, 1377 { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, 1378 { "mpeg_quant", "Use MPEG quantizers instead of H.263", 1379 OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE }, 1380 FF_MPV_COMMON_BFRAME_OPTS 1381 FF_MPV_COMMON_OPTS 1382 FF_MPV_COMMON_MOTION_EST_OPTS 1383 FF_MPEG4_PROFILE_OPTS 1384 { NULL }, 1385}; 1386 1387static const AVClass mpeg4enc_class = { 1388 .class_name = "MPEG4 encoder", 1389 .item_name = av_default_item_name, 1390 .option = options, 1391 .version = LIBAVUTIL_VERSION_INT, 1392}; 1393 1394const FFCodec ff_mpeg4_encoder = { 1395 .p.name = "mpeg4", 1396 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), 1397 .p.type = AVMEDIA_TYPE_VIDEO, 1398 .p.id = AV_CODEC_ID_MPEG4, 1399 .priv_data_size = sizeof(MpegEncContext), 1400 .init = encode_init, 1401 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture), 1402 .close = ff_mpv_encode_end, 1403 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, 1404 .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS, 1405 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, 1406 .p.priv_class = &mpeg4enc_class, 1407}; 1408