| 1 | /* |
| 2 | * MPEG4 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 "mpegutils.h" |
| 27 | #include "mpegvideo.h" |
| 28 | #include "h263.h" |
| 29 | #include "mpeg4video.h" |
| 30 | |
| 31 | /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC |
| 32 | * differences in mpeg4. Unified in the sense that the specification specifies |
| 33 | * this encoding in several steps. */ |
| 34 | static uint8_t uni_DCtab_lum_len[512]; |
| 35 | static uint8_t uni_DCtab_chrom_len[512]; |
| 36 | static uint16_t uni_DCtab_lum_bits[512]; |
| 37 | static uint16_t uni_DCtab_chrom_bits[512]; |
| 38 | |
| 39 | /* Unified encoding tables for run length encoding of coefficients. |
| 40 | * Unified in the sense that the specification specifies the encoding in several steps. */ |
| 41 | static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2]; |
| 42 | static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2]; |
| 43 | static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2]; |
| 44 | static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2]; |
| 45 | |
| 46 | //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level)) |
| 47 | //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64) |
| 48 | #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level)) |
| 49 | |
| 50 | /* mpeg4 |
| 51 | * inter |
| 52 | * max level: 24/6 |
| 53 | * max run: 53/63 |
| 54 | * |
| 55 | * intra |
| 56 | * max level: 53/16 |
| 57 | * max run: 29/41 |
| 58 | */ |
| 59 | |
| 60 | /** |
| 61 | * Return the number of bits that encoding the 8x8 block in block would need. |
| 62 | * @param[in] block_last_index last index in scantable order that refers to a non zero element in block. |
| 63 | */ |
| 64 | static inline int get_block_rate(MpegEncContext *s, int16_t block[64], |
| 65 | int block_last_index, uint8_t scantable[64]) |
| 66 | { |
| 67 | int last = 0; |
| 68 | int j; |
| 69 | int rate = 0; |
| 70 | |
| 71 | for (j = 1; j <= block_last_index; j++) { |
| 72 | const int index = scantable[j]; |
| 73 | int level = block[index]; |
| 74 | if (level) { |
| 75 | level += 64; |
| 76 | if ((level & (~127)) == 0) { |
| 77 | if (j < block_last_index) |
| 78 | rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; |
| 79 | else |
| 80 | rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; |
| 81 | } else |
| 82 | rate += s->ac_esc_length; |
| 83 | |
| 84 | last = j; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | return rate; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Restore the ac coefficients in block that have been changed by decide_ac_pred(). |
| 93 | * This function also restores s->block_last_index. |
| 94 | * @param[in,out] block MB coefficients, these will be restored |
| 95 | * @param[in] dir ac prediction direction for each 8x8 block |
| 96 | * @param[out] st scantable for each 8x8 block |
| 97 | * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order |
| 98 | */ |
| 99 | static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], |
| 100 | const int dir[6], uint8_t *st[6], |
| 101 | const int zigzag_last_index[6]) |
| 102 | { |
| 103 | int i, n; |
| 104 | memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6); |
| 105 | |
| 106 | for (n = 0; n < 6; n++) { |
| 107 | int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; |
| 108 | |
| 109 | st[n] = s->intra_scantable.permutated; |
| 110 | if (dir[n]) { |
| 111 | /* top prediction */ |
| 112 | for (i = 1; i < 8; i++) |
| 113 | block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8]; |
| 114 | } else { |
| 115 | /* left prediction */ |
| 116 | for (i = 1; i < 8; i++) |
| 117 | block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i]; |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4. |
| 124 | * This function will also update s->block_last_index and s->ac_val. |
| 125 | * @param[in,out] block MB coefficients, these will be updated if 1 is returned |
| 126 | * @param[in] dir ac prediction direction for each 8x8 block |
| 127 | * @param[out] st scantable for each 8x8 block |
| 128 | * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order |
| 129 | */ |
| 130 | static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], |
| 131 | const int dir[6], uint8_t *st[6], |
| 132 | int zigzag_last_index[6]) |
| 133 | { |
| 134 | int score = 0; |
| 135 | int i, n; |
| 136 | int8_t *const qscale_table = s->current_picture.qscale_table; |
| 137 | |
| 138 | memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6); |
| 139 | |
| 140 | for (n = 0; n < 6; n++) { |
| 141 | int16_t *ac_val, *ac_val1; |
| 142 | |
| 143 | score -= get_block_rate(s, block[n], s->block_last_index[n], |
| 144 | s->intra_scantable.permutated); |
| 145 | |
| 146 | ac_val = s->ac_val[0][0] + s->block_index[n] * 16; |
| 147 | ac_val1 = ac_val; |
| 148 | if (dir[n]) { |
| 149 | const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; |
| 150 | /* top prediction */ |
| 151 | ac_val -= s->block_wrap[n] * 16; |
| 152 | if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) { |
| 153 | /* same qscale */ |
| 154 | for (i = 1; i < 8; i++) { |
| 155 | const int level = block[n][s->idsp.idct_permutation[i]]; |
| 156 | block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8]; |
| 157 | ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; |
| 158 | ac_val1[i + 8] = level; |
| 159 | } |
| 160 | } else { |
| 161 | /* different qscale, we must rescale */ |
| 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 - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); |
| 165 | ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]]; |
| 166 | ac_val1[i + 8] = level; |
| 167 | } |
| 168 | } |
| 169 | st[n] = s->intra_h_scantable.permutated; |
| 170 | } else { |
| 171 | const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; |
| 172 | /* left prediction */ |
| 173 | ac_val -= 16; |
| 174 | if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) { |
| 175 | /* same qscale */ |
| 176 | for (i = 1; i < 8; i++) { |
| 177 | const int level = block[n][s->idsp.idct_permutation[i << 3]]; |
| 178 | block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i]; |
| 179 | ac_val1[i] = level; |
| 180 | ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; |
| 181 | } |
| 182 | } else { |
| 183 | /* different qscale, we must rescale */ |
| 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 - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); |
| 187 | ac_val1[i] = level; |
| 188 | ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]]; |
| 189 | } |
| 190 | } |
| 191 | st[n] = s->intra_v_scantable.permutated; |
| 192 | } |
| 193 | |
| 194 | for (i = 63; i > 0; i--) // FIXME optimize |
| 195 | if (block[n][st[n][i]]) |
| 196 | break; |
| 197 | s->block_last_index[n] = i; |
| 198 | |
| 199 | score += get_block_rate(s, block[n], s->block_last_index[n], st[n]); |
| 200 | } |
| 201 | |
| 202 | if (score < 0) { |
| 203 | return 1; |
| 204 | } else { |
| 205 | restore_ac_coeffs(s, block, dir, st, zigzag_last_index); |
| 206 | return 0; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * modify mb_type & qscale so that encoding is actually possible in mpeg4 |
| 212 | */ |
| 213 | void ff_clean_mpeg4_qscales(MpegEncContext *s) |
| 214 | { |
| 215 | int i; |
| 216 | int8_t *const qscale_table = s->current_picture.qscale_table; |
| 217 | |
| 218 | ff_clean_h263_qscales(s); |
| 219 | |
| 220 | if (s->pict_type == AV_PICTURE_TYPE_B) { |
| 221 | int odd = 0; |
| 222 | /* ok, come on, this isn't funny anymore, there's more code for |
| 223 | * handling this mpeg4 mess than for the actual adaptive quantization */ |
| 224 | |
| 225 | for (i = 0; i < s->mb_num; i++) { |
| 226 | int mb_xy = s->mb_index2xy[i]; |
| 227 | odd += qscale_table[mb_xy] & 1; |
| 228 | } |
| 229 | |
| 230 | if (2 * odd > s->mb_num) |
| 231 | odd = 1; |
| 232 | else |
| 233 | odd = 0; |
| 234 | |
| 235 | for (i = 0; i < s->mb_num; i++) { |
| 236 | int mb_xy = s->mb_index2xy[i]; |
| 237 | if ((qscale_table[mb_xy] & 1) != odd) |
| 238 | qscale_table[mb_xy]++; |
| 239 | if (qscale_table[mb_xy] > 31) |
| 240 | qscale_table[mb_xy] = 31; |
| 241 | } |
| 242 | |
| 243 | for (i = 1; i < s->mb_num; i++) { |
| 244 | int mb_xy = s->mb_index2xy[i]; |
| 245 | if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] && |
| 246 | (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) { |
| 247 | s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR; |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * Encode the dc value. |
| 255 | * @param n block index (0-3 are luma, 4-5 are chroma) |
| 256 | */ |
| 257 | static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n) |
| 258 | { |
| 259 | #if 1 |
| 260 | /* DC will overflow if level is outside the [-255,255] range. */ |
| 261 | level += 256; |
| 262 | if (n < 4) { |
| 263 | /* luminance */ |
| 264 | put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); |
| 265 | } else { |
| 266 | /* chrominance */ |
| 267 | put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); |
| 268 | } |
| 269 | #else |
| 270 | int size, v; |
| 271 | /* find number of bits */ |
| 272 | size = 0; |
| 273 | v = abs(level); |
| 274 | while (v) { |
| 275 | v >>= 1; |
| 276 | size++; |
| 277 | } |
| 278 | |
| 279 | if (n < 4) { |
| 280 | /* luminance */ |
| 281 | put_bits(s, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]); |
| 282 | } else { |
| 283 | /* chrominance */ |
| 284 | put_bits(s, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]); |
| 285 | } |
| 286 | |
| 287 | /* encode remaining bits */ |
| 288 | if (size > 0) { |
| 289 | if (level < 0) |
| 290 | level = (-level) ^ ((1 << size) - 1); |
| 291 | put_bits(s, size, level); |
| 292 | if (size > 8) |
| 293 | put_bits(s, 1, 1); |
| 294 | } |
| 295 | #endif |
| 296 | } |
| 297 | |
| 298 | static inline int mpeg4_get_dc_length(int level, int n) |
| 299 | { |
| 300 | if (n < 4) |
| 301 | return uni_DCtab_lum_len[level + 256]; |
| 302 | else |
| 303 | return uni_DCtab_chrom_len[level + 256]; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * Encode an 8x8 block. |
| 308 | * @param n block index (0-3 are luma, 4-5 are chroma) |
| 309 | */ |
| 310 | static inline void mpeg4_encode_block(MpegEncContext *s, |
| 311 | int16_t *block, int n, int intra_dc, |
| 312 | uint8_t *scan_table, PutBitContext *dc_pb, |
| 313 | PutBitContext *ac_pb) |
| 314 | { |
| 315 | int i, last_non_zero; |
| 316 | uint32_t *bits_tab; |
| 317 | uint8_t *len_tab; |
| 318 | const int last_index = s->block_last_index[n]; |
| 319 | |
| 320 | if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away |
| 321 | /* mpeg4 based DC predictor */ |
| 322 | mpeg4_encode_dc(dc_pb, intra_dc, n); |
| 323 | if (last_index < 1) |
| 324 | return; |
| 325 | i = 1; |
| 326 | bits_tab = uni_mpeg4_intra_rl_bits; |
| 327 | len_tab = uni_mpeg4_intra_rl_len; |
| 328 | } else { |
| 329 | if (last_index < 0) |
| 330 | return; |
| 331 | i = 0; |
| 332 | bits_tab = uni_mpeg4_inter_rl_bits; |
| 333 | len_tab = uni_mpeg4_inter_rl_len; |
| 334 | } |
| 335 | |
| 336 | /* AC coefs */ |
| 337 | last_non_zero = i - 1; |
| 338 | for (; i < last_index; i++) { |
| 339 | int level = block[scan_table[i]]; |
| 340 | if (level) { |
| 341 | int run = i - last_non_zero - 1; |
| 342 | level += 64; |
| 343 | if ((level & (~127)) == 0) { |
| 344 | const int index = UNI_MPEG4_ENC_INDEX(0, run, level); |
| 345 | put_bits(ac_pb, len_tab[index], bits_tab[index]); |
| 346 | } else { // ESC3 |
| 347 | put_bits(ac_pb, |
| 348 | 7 + 2 + 1 + 6 + 1 + 12 + 1, |
| 349 | (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) + |
| 350 | (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); |
| 351 | } |
| 352 | last_non_zero = i; |
| 353 | } |
| 354 | } |
| 355 | /* if (i <= last_index) */ { |
| 356 | int level = block[scan_table[i]]; |
| 357 | int run = i - last_non_zero - 1; |
| 358 | level += 64; |
| 359 | if ((level & (~127)) == 0) { |
| 360 | const int index = UNI_MPEG4_ENC_INDEX(1, run, level); |
| 361 | put_bits(ac_pb, len_tab[index], bits_tab[index]); |
| 362 | } else { // ESC3 |
| 363 | put_bits(ac_pb, |
| 364 | 7 + 2 + 1 + 6 + 1 + 12 + 1, |
| 365 | (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) + |
| 366 | (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | static int mpeg4_get_block_length(MpegEncContext *s, |
| 372 | int16_t *block, int n, |
| 373 | int intra_dc, uint8_t *scan_table) |
| 374 | { |
| 375 | int i, last_non_zero; |
| 376 | uint8_t *len_tab; |
| 377 | const int last_index = s->block_last_index[n]; |
| 378 | int len = 0; |
| 379 | |
| 380 | if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away |
| 381 | /* mpeg4 based DC predictor */ |
| 382 | len += mpeg4_get_dc_length(intra_dc, n); |
| 383 | if (last_index < 1) |
| 384 | return len; |
| 385 | i = 1; |
| 386 | len_tab = uni_mpeg4_intra_rl_len; |
| 387 | } else { |
| 388 | if (last_index < 0) |
| 389 | return 0; |
| 390 | i = 0; |
| 391 | len_tab = uni_mpeg4_inter_rl_len; |
| 392 | } |
| 393 | |
| 394 | /* AC coefs */ |
| 395 | last_non_zero = i - 1; |
| 396 | for (; i < last_index; i++) { |
| 397 | int level = block[scan_table[i]]; |
| 398 | if (level) { |
| 399 | int run = i - last_non_zero - 1; |
| 400 | level += 64; |
| 401 | if ((level & (~127)) == 0) { |
| 402 | const int index = UNI_MPEG4_ENC_INDEX(0, run, level); |
| 403 | len += len_tab[index]; |
| 404 | } else { // ESC3 |
| 405 | len += 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| 406 | } |
| 407 | last_non_zero = i; |
| 408 | } |
| 409 | } |
| 410 | /* if (i <= last_index) */ { |
| 411 | int level = block[scan_table[i]]; |
| 412 | int run = i - last_non_zero - 1; |
| 413 | level += 64; |
| 414 | if ((level & (~127)) == 0) { |
| 415 | const int index = UNI_MPEG4_ENC_INDEX(1, run, level); |
| 416 | len += len_tab[index]; |
| 417 | } else { // ESC3 |
| 418 | len += 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | return len; |
| 423 | } |
| 424 | |
| 425 | static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], |
| 426 | int intra_dc[6], uint8_t **scan_table, |
| 427 | PutBitContext *dc_pb, |
| 428 | PutBitContext *ac_pb) |
| 429 | { |
| 430 | int i; |
| 431 | |
| 432 | if (scan_table) { |
| 433 | if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) { |
| 434 | for (i = 0; i < 6; i++) |
| 435 | skip_put_bits(&s->pb, |
| 436 | mpeg4_get_block_length(s, block[i], i, |
| 437 | intra_dc[i], scan_table[i])); |
| 438 | } else { |
| 439 | /* encode each block */ |
| 440 | for (i = 0; i < 6; i++) |
| 441 | mpeg4_encode_block(s, block[i], i, |
| 442 | intra_dc[i], scan_table[i], dc_pb, ac_pb); |
| 443 | } |
| 444 | } else { |
| 445 | if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) { |
| 446 | for (i = 0; i < 6; i++) |
| 447 | skip_put_bits(&s->pb, |
| 448 | mpeg4_get_block_length(s, block[i], i, 0, |
| 449 | s->intra_scantable.permutated)); |
| 450 | } else { |
| 451 | /* encode each block */ |
| 452 | for (i = 0; i < 6; i++) |
| 453 | mpeg4_encode_block(s, block[i], i, 0, |
| 454 | s->intra_scantable.permutated, dc_pb, ac_pb); |
| 455 | } |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64], |
| 460 | int motion_x, int motion_y, int mb_type) |
| 461 | { |
| 462 | int cbp = 0, i; |
| 463 | |
| 464 | if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { |
| 465 | int score = 0; |
| 466 | const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); |
| 467 | |
| 468 | for (i = 0; i < 6; i++) { |
| 469 | if (s->coded_score[i] < 0) { |
| 470 | score += s->coded_score[i]; |
| 471 | cbp |= 1 << (5 - i); |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | if (cbp) { |
| 476 | int zero_score = -6; |
| 477 | if ((motion_x | motion_y | s->dquant | mb_type) == 0) |
| 478 | zero_score -= 4; // 2 * MV + mb_type + cbp bit |
| 479 | |
| 480 | zero_score *= lambda; |
| 481 | if (zero_score <= score) |
| 482 | cbp = 0; |
| 483 | } |
| 484 | |
| 485 | for (i = 0; i < 6; i++) { |
| 486 | if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) { |
| 487 | s->block_last_index[i] = -1; |
| 488 | s->bdsp.clear_block(s->block[i]); |
| 489 | } |
| 490 | } |
| 491 | } else { |
| 492 | for (i = 0; i < 6; i++) { |
| 493 | if (s->block_last_index[i] >= 0) |
| 494 | cbp |= 1 << (5 - i); |
| 495 | } |
| 496 | } |
| 497 | return cbp; |
| 498 | } |
| 499 | |
| 500 | // FIXME this is duplicated to h263.c |
| 501 | static const int dquant_code[5] = { 1, 0, 9, 2, 3 }; |
| 502 | |
| 503 | void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], |
| 504 | int motion_x, int motion_y) |
| 505 | { |
| 506 | int cbpc, cbpy, pred_x, pred_y; |
| 507 | PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; |
| 508 | PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; |
| 509 | PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; |
| 510 | const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0; |
| 511 | |
| 512 | if (!s->mb_intra) { |
| 513 | int i, cbp; |
| 514 | |
| 515 | if (s->pict_type == AV_PICTURE_TYPE_B) { |
| 516 | /* convert from mv_dir to type */ |
| 517 | static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 }; |
| 518 | int mb_type = mb_type_table[s->mv_dir]; |
| 519 | |
| 520 | if (s->mb_x == 0) { |
| 521 | for (i = 0; i < 2; i++) |
| 522 | s->last_mv[i][0][0] = |
| 523 | s->last_mv[i][0][1] = |
| 524 | s->last_mv[i][1][0] = |
| 525 | s->last_mv[i][1][1] = 0; |
| 526 | } |
| 527 | |
| 528 | av_assert2(s->dquant >= -2 && s->dquant <= 2); |
| 529 | av_assert2((s->dquant & 1) == 0); |
| 530 | av_assert2(mb_type >= 0); |
| 531 | |
| 532 | /* nothing to do if this MB was skipped in the next P Frame */ |
| 533 | if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ... |
| 534 | s->skip_count++; |
| 535 | s->mv[0][0][0] = |
| 536 | s->mv[0][0][1] = |
| 537 | s->mv[1][0][0] = |
| 538 | s->mv[1][0][1] = 0; |
| 539 | s->mv_dir = MV_DIR_FORWARD; // doesn't matter |
| 540 | s->qscale -= s->dquant; |
| 541 | // s->mb_skipped = 1; |
| 542 | |
| 543 | return; |
| 544 | } |
| 545 | |
| 546 | cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type); |
| 547 | |
| 548 | if ((cbp | motion_x | motion_y | mb_type) == 0) { |
| 549 | /* direct MB with MV={0,0} */ |
| 550 | av_assert2(s->dquant == 0); |
| 551 | |
| 552 | put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ |
| 553 | |
| 554 | if (interleaved_stats) { |
| 555 | s->misc_bits++; |
| 556 | s->last_bits++; |
| 557 | } |
| 558 | s->skip_count++; |
| 559 | return; |
| 560 | } |
| 561 | |
| 562 | put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ |
| 563 | put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge |
| 564 | put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :) |
| 565 | if (cbp) |
| 566 | put_bits(&s->pb, 6, cbp); |
| 567 | |
| 568 | if (cbp && mb_type) { |
| 569 | if (s->dquant) |
| 570 | put_bits(&s->pb, 2, (s->dquant >> 2) + 3); |
| 571 | else |
| 572 | put_bits(&s->pb, 1, 0); |
| 573 | } else |
| 574 | s->qscale -= s->dquant; |
| 575 | |
| 576 | if (!s->progressive_sequence) { |
| 577 | if (cbp) |
| 578 | put_bits(&s->pb, 1, s->interlaced_dct); |
| 579 | if (mb_type) // not direct mode |
| 580 | put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD); |
| 581 | } |
| 582 | |
| 583 | if (interleaved_stats) |
| 584 | s->misc_bits += get_bits_diff(s); |
| 585 | |
| 586 | if (!mb_type) { |
| 587 | av_assert2(s->mv_dir & MV_DIRECT); |
| 588 | ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); |
| 589 | s->b_count++; |
| 590 | s->f_count++; |
| 591 | } else { |
| 592 | av_assert2(mb_type > 0 && mb_type < 4); |
| 593 | if (s->mv_type != MV_TYPE_FIELD) { |
| 594 | if (s->mv_dir & MV_DIR_FORWARD) { |
| 595 | ff_h263_encode_motion_vector(s, |
| 596 | s->mv[0][0][0] - s->last_mv[0][0][0], |
| 597 | s->mv[0][0][1] - s->last_mv[0][0][1], |
| 598 | s->f_code); |
| 599 | s->last_mv[0][0][0] = |
| 600 | s->last_mv[0][1][0] = s->mv[0][0][0]; |
| 601 | s->last_mv[0][0][1] = |
| 602 | s->last_mv[0][1][1] = s->mv[0][0][1]; |
| 603 | s->f_count++; |
| 604 | } |
| 605 | if (s->mv_dir & MV_DIR_BACKWARD) { |
| 606 | ff_h263_encode_motion_vector(s, |
| 607 | s->mv[1][0][0] - s->last_mv[1][0][0], |
| 608 | s->mv[1][0][1] - s->last_mv[1][0][1], |
| 609 | s->b_code); |
| 610 | s->last_mv[1][0][0] = |
| 611 | s->last_mv[1][1][0] = s->mv[1][0][0]; |
| 612 | s->last_mv[1][0][1] = |
| 613 | s->last_mv[1][1][1] = s->mv[1][0][1]; |
| 614 | s->b_count++; |
| 615 | } |
| 616 | } else { |
| 617 | if (s->mv_dir & MV_DIR_FORWARD) { |
| 618 | put_bits(&s->pb, 1, s->field_select[0][0]); |
| 619 | put_bits(&s->pb, 1, s->field_select[0][1]); |
| 620 | } |
| 621 | if (s->mv_dir & MV_DIR_BACKWARD) { |
| 622 | put_bits(&s->pb, 1, s->field_select[1][0]); |
| 623 | put_bits(&s->pb, 1, s->field_select[1][1]); |
| 624 | } |
| 625 | if (s->mv_dir & MV_DIR_FORWARD) { |
| 626 | for (i = 0; i < 2; i++) { |
| 627 | ff_h263_encode_motion_vector(s, |
| 628 | s->mv[0][i][0] - s->last_mv[0][i][0], |
| 629 | s->mv[0][i][1] - s->last_mv[0][i][1] / 2, |
| 630 | s->f_code); |
| 631 | s->last_mv[0][i][0] = s->mv[0][i][0]; |
| 632 | s->last_mv[0][i][1] = s->mv[0][i][1] * 2; |
| 633 | } |
| 634 | s->f_count++; |
| 635 | } |
| 636 | if (s->mv_dir & MV_DIR_BACKWARD) { |
| 637 | for (i = 0; i < 2; i++) { |
| 638 | ff_h263_encode_motion_vector(s, |
| 639 | s->mv[1][i][0] - s->last_mv[1][i][0], |
| 640 | s->mv[1][i][1] - s->last_mv[1][i][1] / 2, |
| 641 | s->b_code); |
| 642 | s->last_mv[1][i][0] = s->mv[1][i][0]; |
| 643 | s->last_mv[1][i][1] = s->mv[1][i][1] * 2; |
| 644 | } |
| 645 | s->b_count++; |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | if (interleaved_stats) |
| 651 | s->mv_bits += get_bits_diff(s); |
| 652 | |
| 653 | mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb); |
| 654 | |
| 655 | if (interleaved_stats) |
| 656 | s->p_tex_bits += get_bits_diff(s); |
| 657 | } else { /* s->pict_type==AV_PICTURE_TYPE_B */ |
| 658 | cbp = get_p_cbp(s, block, motion_x, motion_y); |
| 659 | |
| 660 | if ((cbp | motion_x | motion_y | s->dquant) == 0 && |
| 661 | s->mv_type == MV_TYPE_16X16) { |
| 662 | /* check if the B frames can skip it too, as we must skip it |
| 663 | * if we skip here why didn't they just compress |
| 664 | * the skip-mb bits instead of reusing them ?! */ |
| 665 | if (s->max_b_frames > 0) { |
| 666 | int i; |
| 667 | int x, y, offset; |
| 668 | uint8_t *p_pic; |
| 669 | |
| 670 | x = s->mb_x * 16; |
| 671 | y = s->mb_y * 16; |
| 672 | |
| 673 | offset = x + y * s->linesize; |
| 674 | p_pic = s->new_picture.f->data[0] + offset; |
| 675 | |
| 676 | s->mb_skipped = 1; |
| 677 | for (i = 0; i < s->max_b_frames; i++) { |
| 678 | uint8_t *b_pic; |
| 679 | int diff; |
| 680 | Picture *pic = s->reordered_input_picture[i + 1]; |
| 681 | |
| 682 | if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B) |
| 683 | break; |
| 684 | |
| 685 | b_pic = pic->f->data[0] + offset; |
| 686 | if (!pic->shared) |
| 687 | b_pic += INPLACE_OFFSET; |
| 688 | |
| 689 | if (x + 16 > s->width || y + 16 > s->height) { |
| 690 | int x1, y1; |
| 691 | int xe = FFMIN(16, s->width - x); |
| 692 | int ye = FFMIN(16, s->height - y); |
| 693 | diff = 0; |
| 694 | for (y1 = 0; y1 < ye; y1++) { |
| 695 | for (x1 = 0; x1 < xe; x1++) { |
| 696 | diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]); |
| 697 | } |
| 698 | } |
| 699 | diff = diff * 256 / (xe * ye); |
| 700 | } else { |
| 701 | diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16); |
| 702 | } |
| 703 | if (diff > s->qscale * 70) { // FIXME check that 70 is optimal |
| 704 | s->mb_skipped = 0; |
| 705 | break; |
| 706 | } |
| 707 | } |
| 708 | } else |
| 709 | s->mb_skipped = 1; |
| 710 | |
| 711 | if (s->mb_skipped == 1) { |
| 712 | /* skip macroblock */ |
| 713 | put_bits(&s->pb, 1, 1); |
| 714 | |
| 715 | if (interleaved_stats) { |
| 716 | s->misc_bits++; |
| 717 | s->last_bits++; |
| 718 | } |
| 719 | s->skip_count++; |
| 720 | |
| 721 | return; |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | put_bits(&s->pb, 1, 0); /* mb coded */ |
| 726 | cbpc = cbp & 3; |
| 727 | cbpy = cbp >> 2; |
| 728 | cbpy ^= 0xf; |
| 729 | if (s->mv_type == MV_TYPE_16X16) { |
| 730 | if (s->dquant) |
| 731 | cbpc += 8; |
| 732 | put_bits(&s->pb, |
| 733 | ff_h263_inter_MCBPC_bits[cbpc], |
| 734 | ff_h263_inter_MCBPC_code[cbpc]); |
| 735 | |
| 736 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 737 | if (s->dquant) |
| 738 | put_bits(pb2, 2, dquant_code[s->dquant + 2]); |
| 739 | |
| 740 | if (!s->progressive_sequence) { |
| 741 | if (cbp) |
| 742 | put_bits(pb2, 1, s->interlaced_dct); |
| 743 | put_bits(pb2, 1, 0); |
| 744 | } |
| 745 | |
| 746 | if (interleaved_stats) |
| 747 | s->misc_bits += get_bits_diff(s); |
| 748 | |
| 749 | /* motion vectors: 16x16 mode */ |
| 750 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| 751 | |
| 752 | ff_h263_encode_motion_vector(s, |
| 753 | motion_x - pred_x, |
| 754 | motion_y - pred_y, |
| 755 | s->f_code); |
| 756 | } else if (s->mv_type == MV_TYPE_FIELD) { |
| 757 | if (s->dquant) |
| 758 | cbpc += 8; |
| 759 | put_bits(&s->pb, |
| 760 | ff_h263_inter_MCBPC_bits[cbpc], |
| 761 | ff_h263_inter_MCBPC_code[cbpc]); |
| 762 | |
| 763 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 764 | if (s->dquant) |
| 765 | put_bits(pb2, 2, dquant_code[s->dquant + 2]); |
| 766 | |
| 767 | av_assert2(!s->progressive_sequence); |
| 768 | if (cbp) |
| 769 | put_bits(pb2, 1, s->interlaced_dct); |
| 770 | put_bits(pb2, 1, 1); |
| 771 | |
| 772 | if (interleaved_stats) |
| 773 | s->misc_bits += get_bits_diff(s); |
| 774 | |
| 775 | /* motion vectors: 16x8 interlaced mode */ |
| 776 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| 777 | pred_y /= 2; |
| 778 | |
| 779 | put_bits(&s->pb, 1, s->field_select[0][0]); |
| 780 | put_bits(&s->pb, 1, s->field_select[0][1]); |
| 781 | |
| 782 | ff_h263_encode_motion_vector(s, |
| 783 | s->mv[0][0][0] - pred_x, |
| 784 | s->mv[0][0][1] - pred_y, |
| 785 | s->f_code); |
| 786 | ff_h263_encode_motion_vector(s, |
| 787 | s->mv[0][1][0] - pred_x, |
| 788 | s->mv[0][1][1] - pred_y, |
| 789 | s->f_code); |
| 790 | } else { |
| 791 | av_assert2(s->mv_type == MV_TYPE_8X8); |
| 792 | put_bits(&s->pb, |
| 793 | ff_h263_inter_MCBPC_bits[cbpc + 16], |
| 794 | ff_h263_inter_MCBPC_code[cbpc + 16]); |
| 795 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 796 | |
| 797 | if (!s->progressive_sequence && cbp) |
| 798 | put_bits(pb2, 1, s->interlaced_dct); |
| 799 | |
| 800 | if (interleaved_stats) |
| 801 | s->misc_bits += get_bits_diff(s); |
| 802 | |
| 803 | for (i = 0; i < 4; i++) { |
| 804 | /* motion vectors: 8x8 mode*/ |
| 805 | ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
| 806 | |
| 807 | ff_h263_encode_motion_vector(s, |
| 808 | s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x, |
| 809 | s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y, |
| 810 | s->f_code); |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | if (interleaved_stats) |
| 815 | s->mv_bits += get_bits_diff(s); |
| 816 | |
| 817 | mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb); |
| 818 | |
| 819 | if (interleaved_stats) |
| 820 | s->p_tex_bits += get_bits_diff(s); |
| 821 | |
| 822 | s->f_count++; |
| 823 | } |
| 824 | } else { |
| 825 | int cbp; |
| 826 | int dc_diff[6]; // dc values with the dc prediction subtracted |
| 827 | int dir[6]; // prediction direction |
| 828 | int zigzag_last_index[6]; |
| 829 | uint8_t *scan_table[6]; |
| 830 | int i; |
| 831 | |
| 832 | for (i = 0; i < 6; i++) |
| 833 | dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1); |
| 834 | |
| 835 | if (s->flags & CODEC_FLAG_AC_PRED) { |
| 836 | s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); |
| 837 | } else { |
| 838 | for (i = 0; i < 6; i++) |
| 839 | scan_table[i] = s->intra_scantable.permutated; |
| 840 | } |
| 841 | |
| 842 | /* compute cbp */ |
| 843 | cbp = 0; |
| 844 | for (i = 0; i < 6; i++) |
| 845 | if (s->block_last_index[i] >= 1) |
| 846 | cbp |= 1 << (5 - i); |
| 847 | |
| 848 | cbpc = cbp & 3; |
| 849 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
| 850 | if (s->dquant) |
| 851 | cbpc += 4; |
| 852 | put_bits(&s->pb, |
| 853 | ff_h263_intra_MCBPC_bits[cbpc], |
| 854 | ff_h263_intra_MCBPC_code[cbpc]); |
| 855 | } else { |
| 856 | if (s->dquant) |
| 857 | cbpc += 8; |
| 858 | put_bits(&s->pb, 1, 0); /* mb coded */ |
| 859 | put_bits(&s->pb, |
| 860 | ff_h263_inter_MCBPC_bits[cbpc + 4], |
| 861 | ff_h263_inter_MCBPC_code[cbpc + 4]); |
| 862 | } |
| 863 | put_bits(pb2, 1, s->ac_pred); |
| 864 | cbpy = cbp >> 2; |
| 865 | put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 866 | if (s->dquant) |
| 867 | put_bits(dc_pb, 2, dquant_code[s->dquant + 2]); |
| 868 | |
| 869 | if (!s->progressive_sequence) |
| 870 | put_bits(dc_pb, 1, s->interlaced_dct); |
| 871 | |
| 872 | if (interleaved_stats) |
| 873 | s->misc_bits += get_bits_diff(s); |
| 874 | |
| 875 | mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb); |
| 876 | |
| 877 | if (interleaved_stats) |
| 878 | s->i_tex_bits += get_bits_diff(s); |
| 879 | s->i_count++; |
| 880 | |
| 881 | /* restore ac coeffs & last_index stuff |
| 882 | * if we messed them up with the prediction */ |
| 883 | if (s->ac_pred) |
| 884 | restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); |
| 885 | } |
| 886 | } |
| 887 | |
| 888 | /** |
| 889 | * add mpeg4 stuffing bits (01...1) |
| 890 | */ |
| 891 | void ff_mpeg4_stuffing(PutBitContext *pbc) |
| 892 | { |
| 893 | int length; |
| 894 | put_bits(pbc, 1, 0); |
| 895 | length = (-put_bits_count(pbc)) & 7; |
| 896 | if (length) |
| 897 | put_bits(pbc, length, (1 << length) - 1); |
| 898 | } |
| 899 | |
| 900 | /* must be called before writing the header */ |
| 901 | void ff_set_mpeg4_time(MpegEncContext *s) |
| 902 | { |
| 903 | if (s->pict_type == AV_PICTURE_TYPE_B) { |
| 904 | ff_mpeg4_init_direct_mv(s); |
| 905 | } else { |
| 906 | s->last_time_base = s->time_base; |
| 907 | s->time_base = FFUDIV(s->time, s->avctx->time_base.den); |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | static void mpeg4_encode_gop_header(MpegEncContext *s) |
| 912 | { |
| 913 | int hours, minutes, seconds; |
| 914 | int64_t time; |
| 915 | |
| 916 | put_bits(&s->pb, 16, 0); |
| 917 | put_bits(&s->pb, 16, GOP_STARTCODE); |
| 918 | |
| 919 | time = s->current_picture_ptr->f->pts; |
| 920 | if (s->reordered_input_picture[1]) |
| 921 | time = FFMIN(time, s->reordered_input_picture[1]->f->pts); |
| 922 | time = time * s->avctx->time_base.num; |
| 923 | s->last_time_base = FFUDIV(time, s->avctx->time_base.den); |
| 924 | |
| 925 | seconds = FFUDIV(time, s->avctx->time_base.den); |
| 926 | minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60); |
| 927 | hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60); |
| 928 | hours = FFUMOD(hours , 24); |
| 929 | |
| 930 | put_bits(&s->pb, 5, hours); |
| 931 | put_bits(&s->pb, 6, minutes); |
| 932 | put_bits(&s->pb, 1, 1); |
| 933 | put_bits(&s->pb, 6, seconds); |
| 934 | |
| 935 | put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP)); |
| 936 | put_bits(&s->pb, 1, 0); // broken link == NO |
| 937 | |
| 938 | ff_mpeg4_stuffing(&s->pb); |
| 939 | } |
| 940 | |
| 941 | static void mpeg4_encode_visual_object_header(MpegEncContext *s) |
| 942 | { |
| 943 | int profile_and_level_indication; |
| 944 | int vo_ver_id; |
| 945 | |
| 946 | if (s->avctx->profile != FF_PROFILE_UNKNOWN) { |
| 947 | profile_and_level_indication = s->avctx->profile << 4; |
| 948 | } else if (s->max_b_frames || s->quarter_sample) { |
| 949 | profile_and_level_indication = 0xF0; // adv simple |
| 950 | } else { |
| 951 | profile_and_level_indication = 0x00; // simple |
| 952 | } |
| 953 | |
| 954 | if (s->avctx->level != FF_LEVEL_UNKNOWN) |
| 955 | profile_and_level_indication |= s->avctx->level; |
| 956 | else |
| 957 | profile_and_level_indication |= 1; // level 1 |
| 958 | |
| 959 | if (profile_and_level_indication >> 4 == 0xF) |
| 960 | vo_ver_id = 5; |
| 961 | else |
| 962 | vo_ver_id = 1; |
| 963 | |
| 964 | // FIXME levels |
| 965 | |
| 966 | put_bits(&s->pb, 16, 0); |
| 967 | put_bits(&s->pb, 16, VOS_STARTCODE); |
| 968 | |
| 969 | put_bits(&s->pb, 8, profile_and_level_indication); |
| 970 | |
| 971 | put_bits(&s->pb, 16, 0); |
| 972 | put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE); |
| 973 | |
| 974 | put_bits(&s->pb, 1, 1); |
| 975 | put_bits(&s->pb, 4, vo_ver_id); |
| 976 | put_bits(&s->pb, 3, 1); // priority |
| 977 | |
| 978 | put_bits(&s->pb, 4, 1); // visual obj type== video obj |
| 979 | |
| 980 | put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME |
| 981 | |
| 982 | ff_mpeg4_stuffing(&s->pb); |
| 983 | } |
| 984 | |
| 985 | static void mpeg4_encode_vol_header(MpegEncContext *s, |
| 986 | int vo_number, |
| 987 | int vol_number) |
| 988 | { |
| 989 | int vo_ver_id; |
| 990 | |
| 991 | if (!CONFIG_MPEG4_ENCODER) |
| 992 | return; |
| 993 | |
| 994 | if (s->max_b_frames || s->quarter_sample) { |
| 995 | vo_ver_id = 5; |
| 996 | s->vo_type = ADV_SIMPLE_VO_TYPE; |
| 997 | } else { |
| 998 | vo_ver_id = 1; |
| 999 | s->vo_type = SIMPLE_VO_TYPE; |
| 1000 | } |
| 1001 | |
| 1002 | put_bits(&s->pb, 16, 0); |
| 1003 | put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */ |
| 1004 | put_bits(&s->pb, 16, 0); |
| 1005 | put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */ |
| 1006 | |
| 1007 | put_bits(&s->pb, 1, 0); /* random access vol */ |
| 1008 | put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */ |
| 1009 | if (s->workaround_bugs & FF_BUG_MS) { |
| 1010 | put_bits(&s->pb, 1, 0); /* is obj layer id= no */ |
| 1011 | } else { |
| 1012 | put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ |
| 1013 | put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ |
| 1014 | put_bits(&s->pb, 3, 1); /* is obj layer priority */ |
| 1015 | } |
| 1016 | |
| 1017 | s->aspect_ratio_info = ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); |
| 1018 | |
| 1019 | put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */ |
| 1020 | if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { |
| 1021 | av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den, |
| 1022 | s->avctx->sample_aspect_ratio.num, s->avctx->sample_aspect_ratio.den, 255); |
| 1023 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); |
| 1024 | put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); |
| 1025 | } |
| 1026 | |
| 1027 | if (s->workaround_bugs & FF_BUG_MS) { |
| 1028 | put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */ |
| 1029 | } else { |
| 1030 | put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ |
| 1031 | put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ |
| 1032 | put_bits(&s->pb, 1, s->low_delay); |
| 1033 | put_bits(&s->pb, 1, 0); /* vbv parameters= no */ |
| 1034 | } |
| 1035 | |
| 1036 | put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ |
| 1037 | put_bits(&s->pb, 1, 1); /* marker bit */ |
| 1038 | |
| 1039 | put_bits(&s->pb, 16, s->avctx->time_base.den); |
| 1040 | if (s->time_increment_bits < 1) |
| 1041 | s->time_increment_bits = 1; |
| 1042 | put_bits(&s->pb, 1, 1); /* marker bit */ |
| 1043 | put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ |
| 1044 | put_bits(&s->pb, 1, 1); /* marker bit */ |
| 1045 | put_bits(&s->pb, 13, s->width); /* vol width */ |
| 1046 | put_bits(&s->pb, 1, 1); /* marker bit */ |
| 1047 | put_bits(&s->pb, 13, s->height); /* vol height */ |
| 1048 | put_bits(&s->pb, 1, 1); /* marker bit */ |
| 1049 | put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1); |
| 1050 | put_bits(&s->pb, 1, 1); /* obmc disable */ |
| 1051 | if (vo_ver_id == 1) |
| 1052 | put_bits(&s->pb, 1, 0); /* sprite enable */ |
| 1053 | else |
| 1054 | put_bits(&s->pb, 2, 0); /* sprite enable */ |
| 1055 | |
| 1056 | put_bits(&s->pb, 1, 0); /* not 8 bit == false */ |
| 1057 | put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/ |
| 1058 | |
| 1059 | if (s->mpeg_quant) { |
| 1060 | ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); |
| 1061 | ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); |
| 1062 | } |
| 1063 | |
| 1064 | if (vo_ver_id != 1) |
| 1065 | put_bits(&s->pb, 1, s->quarter_sample); |
| 1066 | put_bits(&s->pb, 1, 1); /* complexity estimation disable */ |
| 1067 | put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */ |
| 1068 | put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0); |
| 1069 | if (s->data_partitioning) |
| 1070 | put_bits(&s->pb, 1, 0); /* no rvlc */ |
| 1071 | |
| 1072 | if (vo_ver_id != 1) { |
| 1073 | put_bits(&s->pb, 1, 0); /* newpred */ |
| 1074 | put_bits(&s->pb, 1, 0); /* reduced res vop */ |
| 1075 | } |
| 1076 | put_bits(&s->pb, 1, 0); /* scalability */ |
| 1077 | |
| 1078 | ff_mpeg4_stuffing(&s->pb); |
| 1079 | |
| 1080 | /* user data */ |
| 1081 | if (!(s->flags & CODEC_FLAG_BITEXACT)) { |
| 1082 | put_bits(&s->pb, 16, 0); |
| 1083 | put_bits(&s->pb, 16, 0x1B2); /* user_data */ |
| 1084 | avpriv_put_string(&s->pb, LIBAVCODEC_IDENT, 0); |
| 1085 | } |
| 1086 | } |
| 1087 | |
| 1088 | /* write mpeg4 VOP header */ |
| 1089 | void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number) |
| 1090 | { |
| 1091 | int time_incr; |
| 1092 | int time_div, time_mod; |
| 1093 | |
| 1094 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
| 1095 | if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) { |
| 1096 | if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy |
| 1097 | mpeg4_encode_visual_object_header(s); |
| 1098 | if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy |
| 1099 | mpeg4_encode_vol_header(s, 0, 0); |
| 1100 | } |
| 1101 | if (!(s->workaround_bugs & FF_BUG_MS)) |
| 1102 | mpeg4_encode_gop_header(s); |
| 1103 | } |
| 1104 | |
| 1105 | s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; |
| 1106 | |
| 1107 | put_bits(&s->pb, 16, 0); /* vop header */ |
| 1108 | put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */ |
| 1109 | put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */ |
| 1110 | |
| 1111 | time_div = FFUDIV(s->time, s->avctx->time_base.den); |
| 1112 | time_mod = FFUMOD(s->time, s->avctx->time_base.den); |
| 1113 | time_incr = time_div - s->last_time_base; |
| 1114 | av_assert0(time_incr >= 0); |
| 1115 | while (time_incr--) |
| 1116 | put_bits(&s->pb, 1, 1); |
| 1117 | |
| 1118 | put_bits(&s->pb, 1, 0); |
| 1119 | |
| 1120 | put_bits(&s->pb, 1, 1); /* marker */ |
| 1121 | put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */ |
| 1122 | put_bits(&s->pb, 1, 1); /* marker */ |
| 1123 | put_bits(&s->pb, 1, 1); /* vop coded */ |
| 1124 | if (s->pict_type == AV_PICTURE_TYPE_P) { |
| 1125 | put_bits(&s->pb, 1, s->no_rounding); /* rounding type */ |
| 1126 | } |
| 1127 | put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ |
| 1128 | if (!s->progressive_sequence) { |
| 1129 | put_bits(&s->pb, 1, s->current_picture_ptr->f->top_field_first); |
| 1130 | put_bits(&s->pb, 1, s->alternate_scan); |
| 1131 | } |
| 1132 | // FIXME sprite stuff |
| 1133 | |
| 1134 | put_bits(&s->pb, 5, s->qscale); |
| 1135 | |
| 1136 | if (s->pict_type != AV_PICTURE_TYPE_I) |
| 1137 | put_bits(&s->pb, 3, s->f_code); /* fcode_for */ |
| 1138 | if (s->pict_type == AV_PICTURE_TYPE_B) |
| 1139 | put_bits(&s->pb, 3, s->b_code); /* fcode_back */ |
| 1140 | } |
| 1141 | |
| 1142 | static av_cold void init_uni_dc_tab(void) |
| 1143 | { |
| 1144 | int level, uni_code, uni_len; |
| 1145 | |
| 1146 | for (level = -256; level < 256; level++) { |
| 1147 | int size, v, l; |
| 1148 | /* find number of bits */ |
| 1149 | size = 0; |
| 1150 | v = abs(level); |
| 1151 | while (v) { |
| 1152 | v >>= 1; |
| 1153 | size++; |
| 1154 | } |
| 1155 | |
| 1156 | if (level < 0) |
| 1157 | l = (-level) ^ ((1 << size) - 1); |
| 1158 | else |
| 1159 | l = level; |
| 1160 | |
| 1161 | /* luminance */ |
| 1162 | uni_code = ff_mpeg4_DCtab_lum[size][0]; |
| 1163 | uni_len = ff_mpeg4_DCtab_lum[size][1]; |
| 1164 | |
| 1165 | if (size > 0) { |
| 1166 | uni_code <<= size; |
| 1167 | uni_code |= l; |
| 1168 | uni_len += size; |
| 1169 | if (size > 8) { |
| 1170 | uni_code <<= 1; |
| 1171 | uni_code |= 1; |
| 1172 | uni_len++; |
| 1173 | } |
| 1174 | } |
| 1175 | uni_DCtab_lum_bits[level + 256] = uni_code; |
| 1176 | uni_DCtab_lum_len[level + 256] = uni_len; |
| 1177 | |
| 1178 | /* chrominance */ |
| 1179 | uni_code = ff_mpeg4_DCtab_chrom[size][0]; |
| 1180 | uni_len = ff_mpeg4_DCtab_chrom[size][1]; |
| 1181 | |
| 1182 | if (size > 0) { |
| 1183 | uni_code <<= size; |
| 1184 | uni_code |= l; |
| 1185 | uni_len += size; |
| 1186 | if (size > 8) { |
| 1187 | uni_code <<= 1; |
| 1188 | uni_code |= 1; |
| 1189 | uni_len++; |
| 1190 | } |
| 1191 | } |
| 1192 | uni_DCtab_chrom_bits[level + 256] = uni_code; |
| 1193 | uni_DCtab_chrom_len[level + 256] = uni_len; |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, |
| 1198 | uint8_t *len_tab) |
| 1199 | { |
| 1200 | int slevel, run, last; |
| 1201 | |
| 1202 | av_assert0(MAX_LEVEL >= 64); |
| 1203 | av_assert0(MAX_RUN >= 63); |
| 1204 | |
| 1205 | for (slevel = -64; slevel < 64; slevel++) { |
| 1206 | if (slevel == 0) |
| 1207 | continue; |
| 1208 | for (run = 0; run < 64; run++) { |
| 1209 | for (last = 0; last <= 1; last++) { |
| 1210 | const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64); |
| 1211 | int level = slevel < 0 ? -slevel : slevel; |
| 1212 | int sign = slevel < 0 ? 1 : 0; |
| 1213 | int bits, len, code; |
| 1214 | int level1, run1; |
| 1215 | |
| 1216 | len_tab[index] = 100; |
| 1217 | |
| 1218 | /* ESC0 */ |
| 1219 | code = get_rl_index(rl, last, run, level); |
| 1220 | bits = rl->table_vlc[code][0]; |
| 1221 | len = rl->table_vlc[code][1]; |
| 1222 | bits = bits * 2 + sign; |
| 1223 | len++; |
| 1224 | |
| 1225 | if (code != rl->n && len < len_tab[index]) { |
| 1226 | bits_tab[index] = bits; |
| 1227 | len_tab[index] = len; |
| 1228 | } |
| 1229 | /* ESC1 */ |
| 1230 | bits = rl->table_vlc[rl->n][0]; |
| 1231 | len = rl->table_vlc[rl->n][1]; |
| 1232 | bits = bits * 2; |
| 1233 | len++; // esc1 |
| 1234 | level1 = level - rl->max_level[last][run]; |
| 1235 | if (level1 > 0) { |
| 1236 | code = get_rl_index(rl, last, run, level1); |
| 1237 | bits <<= rl->table_vlc[code][1]; |
| 1238 | len += rl->table_vlc[code][1]; |
| 1239 | bits += rl->table_vlc[code][0]; |
| 1240 | bits = bits * 2 + sign; |
| 1241 | len++; |
| 1242 | |
| 1243 | if (code != rl->n && len < len_tab[index]) { |
| 1244 | bits_tab[index] = bits; |
| 1245 | len_tab[index] = len; |
| 1246 | } |
| 1247 | } |
| 1248 | /* ESC2 */ |
| 1249 | bits = rl->table_vlc[rl->n][0]; |
| 1250 | len = rl->table_vlc[rl->n][1]; |
| 1251 | bits = bits * 4 + 2; |
| 1252 | len += 2; // esc2 |
| 1253 | run1 = run - rl->max_run[last][level] - 1; |
| 1254 | if (run1 >= 0) { |
| 1255 | code = get_rl_index(rl, last, run1, level); |
| 1256 | bits <<= rl->table_vlc[code][1]; |
| 1257 | len += rl->table_vlc[code][1]; |
| 1258 | bits += rl->table_vlc[code][0]; |
| 1259 | bits = bits * 2 + sign; |
| 1260 | len++; |
| 1261 | |
| 1262 | if (code != rl->n && len < len_tab[index]) { |
| 1263 | bits_tab[index] = bits; |
| 1264 | len_tab[index] = len; |
| 1265 | } |
| 1266 | } |
| 1267 | /* ESC3 */ |
| 1268 | bits = rl->table_vlc[rl->n][0]; |
| 1269 | len = rl->table_vlc[rl->n][1]; |
| 1270 | bits = bits * 4 + 3; |
| 1271 | len += 2; // esc3 |
| 1272 | bits = bits * 2 + last; |
| 1273 | len++; |
| 1274 | bits = bits * 64 + run; |
| 1275 | len += 6; |
| 1276 | bits = bits * 2 + 1; |
| 1277 | len++; // marker |
| 1278 | bits = bits * 4096 + (slevel & 0xfff); |
| 1279 | len += 12; |
| 1280 | bits = bits * 2 + 1; |
| 1281 | len++; // marker |
| 1282 | |
| 1283 | if (len < len_tab[index]) { |
| 1284 | bits_tab[index] = bits; |
| 1285 | len_tab[index] = len; |
| 1286 | } |
| 1287 | } |
| 1288 | } |
| 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | static av_cold int encode_init(AVCodecContext *avctx) |
| 1293 | { |
| 1294 | MpegEncContext *s = avctx->priv_data; |
| 1295 | int ret; |
| 1296 | static int done = 0; |
| 1297 | |
| 1298 | if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) { |
| 1299 | av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n"); |
| 1300 | return AVERROR(EINVAL); |
| 1301 | } |
| 1302 | |
| 1303 | if ((ret = ff_mpv_encode_init(avctx)) < 0) |
| 1304 | return ret; |
| 1305 | |
| 1306 | if (!done) { |
| 1307 | done = 1; |
| 1308 | |
| 1309 | init_uni_dc_tab(); |
| 1310 | |
| 1311 | ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); |
| 1312 | |
| 1313 | init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); |
| 1314 | init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); |
| 1315 | } |
| 1316 | |
| 1317 | s->min_qcoeff = -2048; |
| 1318 | s->max_qcoeff = 2047; |
| 1319 | s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; |
| 1320 | s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64; |
| 1321 | s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; |
| 1322 | s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64; |
| 1323 | s->luma_dc_vlc_length = uni_DCtab_lum_len; |
| 1324 | s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1; |
| 1325 | s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; |
| 1326 | s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; |
| 1327 | |
| 1328 | if (s->flags & CODEC_FLAG_GLOBAL_HEADER) { |
| 1329 | s->avctx->extradata = av_malloc(1024); |
| 1330 | init_put_bits(&s->pb, s->avctx->extradata, 1024); |
| 1331 | |
| 1332 | if (!(s->workaround_bugs & FF_BUG_MS)) |
| 1333 | mpeg4_encode_visual_object_header(s); |
| 1334 | mpeg4_encode_vol_header(s, 0, 0); |
| 1335 | |
| 1336 | // ff_mpeg4_stuffing(&s->pb); ? |
| 1337 | flush_put_bits(&s->pb); |
| 1338 | s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3; |
| 1339 | } |
| 1340 | return 0; |
| 1341 | } |
| 1342 | |
| 1343 | void ff_mpeg4_init_partitions(MpegEncContext *s) |
| 1344 | { |
| 1345 | uint8_t *start = put_bits_ptr(&s->pb); |
| 1346 | uint8_t *end = s->pb.buf_end; |
| 1347 | int size = end - start; |
| 1348 | int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start; |
| 1349 | int tex_size = (size - 2 * pb_size) & (~3); |
| 1350 | |
| 1351 | set_put_bits_buffer_size(&s->pb, pb_size); |
| 1352 | init_put_bits(&s->tex_pb, start + pb_size, tex_size); |
| 1353 | init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size); |
| 1354 | } |
| 1355 | |
| 1356 | void ff_mpeg4_merge_partitions(MpegEncContext *s) |
| 1357 | { |
| 1358 | const int pb2_len = put_bits_count(&s->pb2); |
| 1359 | const int tex_pb_len = put_bits_count(&s->tex_pb); |
| 1360 | const int bits = put_bits_count(&s->pb); |
| 1361 | |
| 1362 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
| 1363 | put_bits(&s->pb, 19, DC_MARKER); |
| 1364 | s->misc_bits += 19 + pb2_len + bits - s->last_bits; |
| 1365 | s->i_tex_bits += tex_pb_len; |
| 1366 | } else { |
| 1367 | put_bits(&s->pb, 17, MOTION_MARKER); |
| 1368 | s->misc_bits += 17 + pb2_len; |
| 1369 | s->mv_bits += bits - s->last_bits; |
| 1370 | s->p_tex_bits += tex_pb_len; |
| 1371 | } |
| 1372 | |
| 1373 | flush_put_bits(&s->pb2); |
| 1374 | flush_put_bits(&s->tex_pb); |
| 1375 | |
| 1376 | set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); |
| 1377 | avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len); |
| 1378 | avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); |
| 1379 | s->last_bits = put_bits_count(&s->pb); |
| 1380 | } |
| 1381 | |
| 1382 | void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) |
| 1383 | { |
| 1384 | int mb_num_bits = av_log2(s->mb_num - 1) + 1; |
| 1385 | |
| 1386 | put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s), 0); |
| 1387 | put_bits(&s->pb, 1, 1); |
| 1388 | |
| 1389 | put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width); |
| 1390 | put_bits(&s->pb, s->quant_precision, s->qscale); |
| 1391 | put_bits(&s->pb, 1, 0); /* no HEC */ |
| 1392 | } |
| 1393 | |
| 1394 | #define OFFSET(x) offsetof(MpegEncContext, x) |
| 1395 | #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM |
| 1396 | static const AVOption options[] = { |
| 1397 | { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, |
| 1398 | { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, |
| 1399 | FF_MPV_COMMON_OPTS |
| 1400 | { NULL }, |
| 1401 | }; |
| 1402 | |
| 1403 | static const AVClass mpeg4enc_class = { |
| 1404 | .class_name = "MPEG4 encoder", |
| 1405 | .item_name = av_default_item_name, |
| 1406 | .option = options, |
| 1407 | .version = LIBAVUTIL_VERSION_INT, |
| 1408 | }; |
| 1409 | |
| 1410 | AVCodec ff_mpeg4_encoder = { |
| 1411 | .name = "mpeg4", |
| 1412 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), |
| 1413 | .type = AVMEDIA_TYPE_VIDEO, |
| 1414 | .id = AV_CODEC_ID_MPEG4, |
| 1415 | .priv_data_size = sizeof(MpegEncContext), |
| 1416 | .init = encode_init, |
| 1417 | .encode2 = ff_mpv_encode_picture, |
| 1418 | .close = ff_mpv_encode_end, |
| 1419 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
| 1420 | .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS, |
| 1421 | .priv_class = &mpeg4enc_class, |
| 1422 | }; |