1/* 2 * Interface to xvidcore for MPEG-4 encoding 3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * Interface to xvidcore for MPEG-4 compliant encoding. 25 * @author Adam Thayer (krevnik@comcast.net) 26 */ 27 28#include <stdio.h> 29#include <string.h> 30#include <xvid.h> 31 32#include "libavutil/avassert.h" 33#include "libavutil/file.h" 34#include "libavutil/internal.h" 35#include "libavutil/intreadwrite.h" 36#include "libavutil/mathematics.h" 37#include "libavutil/mem.h" 38#include "libavutil/opt.h" 39 40#include "avcodec.h" 41#include "codec_internal.h" 42#include "encode.h" 43#include "mpegutils.h" 44#include "packet_internal.h" 45 46#if HAVE_UNISTD_H 47#include <unistd.h> 48#endif 49 50#if HAVE_IO_H 51#include <io.h> 52#endif 53 54/** 55 * Buffer management macros. 56 */ 57#define BUFFER_SIZE 1024 58#define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x)) 59#define BUFFER_CAT(x) (&((x)[strlen(x)])) 60 61/** 62 * Structure for the private Xvid context. 63 * This stores all the private context for the codec. 64 */ 65struct xvid_context { 66 AVClass *class; 67 void *encoder_handle; /**< Handle for Xvid encoder */ 68 int xsize; /**< Frame x size */ 69 int ysize; /**< Frame y size */ 70 int vop_flags; /**< VOP flags for Xvid encoder */ 71 int vol_flags; /**< VOL flags for Xvid encoder */ 72 int me_flags; /**< Motion Estimation flags */ 73 int qscale; /**< Do we use constant scale? */ 74 int quicktime_format; /**< Are we in a QT-based format? */ 75 char *twopassbuffer; /**< Character buffer for two-pass */ 76 char *old_twopassbuffer; /**< Old character buffer (two-pass) */ 77 char *twopassfile; /**< second pass temp file name */ 78 int twopassfd; 79 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */ 80 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */ 81 int lumi_aq; /**< Lumi masking as an aq method */ 82 int variance_aq; /**< Variance adaptive quantization */ 83 int ssim; /**< SSIM information display mode */ 84 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */ 85 int gmc; 86 int me_quality; /**< Motion estimation quality. 0: fast 6: best. */ 87 int mpeg_quant; /**< Quantization type. 0: H.263, 1: MPEG */ 88}; 89 90/** 91 * Structure for the private first-pass plugin. 92 */ 93struct xvid_ff_pass1 { 94 int version; /**< Xvid version */ 95 struct xvid_context *context; /**< Pointer to private context */ 96}; 97 98static int xvid_encode_close(AVCodecContext *avctx); 99static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 100 const AVFrame *picture, int *got_packet); 101 102 103/* 104 * Xvid 2-Pass Kludge Section 105 * 106 * Xvid's default 2-pass doesn't allow us to create data as we need to, so 107 * this section spends time replacing the first pass plugin so we can write 108 * statistic information as libavcodec requests in. We have another kludge 109 * that allows us to pass data to the second pass in Xvid without a custom 110 * rate-control plugin. 111 */ 112 113/** 114 * Initialize the two-pass plugin and context. 115 * 116 * @param param Input construction parameter structure 117 * @param handle Private context handle 118 * @return Returns XVID_ERR_xxxx on failure, or 0 on success. 119 */ 120static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle) 121{ 122 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *) param->param; 123 char *log = x->context->twopassbuffer; 124 125 /* Do a quick bounds check */ 126 if (!log) 127 return XVID_ERR_FAIL; 128 129 /* We use snprintf() */ 130 /* This is because we can safely prevent a buffer overflow */ 131 log[0] = 0; 132 snprintf(log, BUFFER_REMAINING(log), 133 "# ffmpeg 2-pass log file, using xvid codec\n"); 134 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log), 135 "# Do not modify. libxvidcore version: %d.%d.%d\n\n", 136 XVID_VERSION_MAJOR(XVID_VERSION), 137 XVID_VERSION_MINOR(XVID_VERSION), 138 XVID_VERSION_PATCH(XVID_VERSION)); 139 140 *handle = x->context; 141 return 0; 142} 143 144/** 145 * Destroy the two-pass plugin context. 146 * 147 * @param ref Context pointer for the plugin 148 * @param param Destroy context 149 * @return Returns 0, success guaranteed 150 */ 151static int xvid_ff_2pass_destroy(struct xvid_context *ref, 152 xvid_plg_destroy_t *param) 153{ 154 /* Currently cannot think of anything to do on destruction */ 155 /* Still, the framework should be here for reference/use */ 156 if (ref->twopassbuffer) 157 ref->twopassbuffer[0] = 0; 158 return 0; 159} 160 161/** 162 * Enable fast encode mode during the first pass. 163 * 164 * @param ref Context pointer for the plugin 165 * @param param Frame data 166 * @return Returns 0, success guaranteed 167 */ 168static int xvid_ff_2pass_before(struct xvid_context *ref, 169 xvid_plg_data_t *param) 170{ 171 int motion_remove; 172 int motion_replacements; 173 int vop_remove; 174 175 /* Nothing to do here, result is changed too much */ 176 if (param->zone && param->zone->mode == XVID_ZONE_QUANT) 177 return 0; 178 179 /* We can implement a 'turbo' first pass mode here */ 180 param->quant = 2; 181 182 /* Init values */ 183 motion_remove = ~XVID_ME_CHROMA_PVOP & 184 ~XVID_ME_CHROMA_BVOP & 185 ~XVID_ME_EXTSEARCH16 & 186 ~XVID_ME_ADVANCEDDIAMOND16; 187 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE | 188 XVID_ME_SKIP_DELTASEARCH | 189 XVID_ME_FASTREFINE16 | 190 XVID_ME_BFRAME_EARLYSTOP; 191 vop_remove = ~XVID_VOP_MODEDECISION_RD & 192 ~XVID_VOP_FAST_MODEDECISION_RD & 193 ~XVID_VOP_TRELLISQUANT & 194 ~XVID_VOP_INTER4V & 195 ~XVID_VOP_HQACPRED; 196 197 param->vol_flags &= ~XVID_VOL_GMC; 198 param->vop_flags &= vop_remove; 199 param->motion_flags &= motion_remove; 200 param->motion_flags |= motion_replacements; 201 202 return 0; 203} 204 205/** 206 * Capture statistic data and write it during first pass. 207 * 208 * @param ref Context pointer for the plugin 209 * @param param Statistic data 210 * @return Returns XVID_ERR_xxxx on failure, or 0 on success 211 */ 212static int xvid_ff_2pass_after(struct xvid_context *ref, 213 xvid_plg_data_t *param) 214{ 215 char *log = ref->twopassbuffer; 216 const char *frame_types = " ipbs"; 217 char frame_type; 218 219 /* Quick bounds check */ 220 if (!log) 221 return XVID_ERR_FAIL; 222 223 /* Convert the type given to us into a character */ 224 if (param->type < 5 && param->type > 0) 225 frame_type = frame_types[param->type]; 226 else 227 return XVID_ERR_FAIL; 228 229 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log), 230 "%c %d %d %d %d %d %d\n", 231 frame_type, param->stats.quant, param->stats.kblks, 232 param->stats.mblks, param->stats.ublks, 233 param->stats.length, param->stats.hlength); 234 235 return 0; 236} 237 238/** 239 * Dispatch function for our custom plugin. 240 * This handles the dispatch for the Xvid plugin. It passes data 241 * on to other functions for actual processing. 242 * 243 * @param ref Context pointer for the plugin 244 * @param cmd The task given for us to complete 245 * @param p1 First parameter (varies) 246 * @param p2 Second parameter (varies) 247 * @return Returns XVID_ERR_xxxx on failure, or 0 on success 248 */ 249static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) 250{ 251 switch (cmd) { 252 case XVID_PLG_INFO: 253 case XVID_PLG_FRAME: 254 return 0; 255 case XVID_PLG_BEFORE: 256 return xvid_ff_2pass_before(ref, p1); 257 case XVID_PLG_CREATE: 258 return xvid_ff_2pass_create(p1, p2); 259 case XVID_PLG_AFTER: 260 return xvid_ff_2pass_after(ref, p1); 261 case XVID_PLG_DESTROY: 262 return xvid_ff_2pass_destroy(ref, p1); 263 default: 264 return XVID_ERR_FAIL; 265 } 266} 267 268/** 269 * Routine to create a global VO/VOL header for MP4 container. 270 * What we do here is extract the header from the Xvid bitstream 271 * as it is encoded. We also strip the repeated headers from the 272 * bitstream when a global header is requested for MPEG-4 ISO 273 * compliance. 274 * 275 * @param avctx AVCodecContext pointer to context 276 * @param frame Pointer to encoded frame data 277 * @param header_len Length of header to search 278 * @param frame_len Length of encoded frame data 279 * @return Returns new length of frame data 280 */ 281static int xvid_strip_vol_header(AVCodecContext *avctx, AVPacket *pkt, 282 unsigned int header_len, 283 unsigned int frame_len) 284{ 285 int vo_len = 0, i; 286 287 for (i = 0; i < header_len - 3; i++) { 288 if (pkt->data[i] == 0x00 && 289 pkt->data[i + 1] == 0x00 && 290 pkt->data[i + 2] == 0x01 && 291 pkt->data[i + 3] == 0xB6) { 292 vo_len = i; 293 break; 294 } 295 } 296 297 if (vo_len > 0) { 298 /* We need to store the header, so extract it */ 299 if (!avctx->extradata) { 300 avctx->extradata = av_malloc(vo_len); 301 if (!avctx->extradata) 302 return AVERROR(ENOMEM); 303 memcpy(avctx->extradata, pkt->data, vo_len); 304 avctx->extradata_size = vo_len; 305 } 306 /* Less dangerous now, memmove properly copies the two 307 * chunks of overlapping data */ 308 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len); 309 pkt->size = frame_len - vo_len; 310 } 311 return 0; 312} 313 314/** 315 * Routine to correct a possibly erroneous framerate being fed to us. 316 * Xvid currently chokes on framerates where the ticks per frame is 317 * extremely large. This function works to correct problems in this area 318 * by estimating a new framerate and taking the simpler fraction of 319 * the two presented. 320 * 321 * @param avctx Context that contains the framerate to correct. 322 */ 323static void xvid_correct_framerate(AVCodecContext *avctx) 324{ 325 int frate, fbase; 326 int est_frate, est_fbase; 327 int gcd; 328 float est_fps, fps; 329 330 frate = avctx->time_base.den; 331 fbase = avctx->time_base.num; 332 333 gcd = av_gcd(frate, fbase); 334 if (gcd > 1) { 335 frate /= gcd; 336 fbase /= gcd; 337 } 338 339 if (frate <= 65000 && fbase <= 65000) { 340 avctx->time_base.den = frate; 341 avctx->time_base.num = fbase; 342 return; 343 } 344 345 fps = (float) frate / (float) fbase; 346 est_fps = roundf(fps * 1000.0) / 1000.0; 347 348 est_frate = (int) est_fps; 349 if (est_fps > (int) est_fps) { 350 est_frate = (est_frate + 1) * 1000; 351 est_fbase = (int) roundf((float) est_frate / est_fps); 352 } else 353 est_fbase = 1; 354 355 gcd = av_gcd(est_frate, est_fbase); 356 if (gcd > 1) { 357 est_frate /= gcd; 358 est_fbase /= gcd; 359 } 360 361 if (fbase > est_fbase) { 362 avctx->time_base.den = est_frate; 363 avctx->time_base.num = est_fbase; 364 av_log(avctx, AV_LOG_DEBUG, 365 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n", 366 est_fps, (((est_fps - fps) / fps) * 100.0)); 367 } else { 368 avctx->time_base.den = frate; 369 avctx->time_base.num = fbase; 370 } 371} 372 373static av_cold int xvid_encode_init(AVCodecContext *avctx) 374{ 375 int xerr, i, ret = -1; 376 int xvid_flags = avctx->flags; 377 struct xvid_context *x = avctx->priv_data; 378 uint16_t *intra, *inter; 379 int fd; 380 381 xvid_plugin_single_t single = { 0 }; 382 struct xvid_ff_pass1 rc2pass1 = { 0 }; 383 xvid_plugin_2pass2_t rc2pass2 = { 0 }; 384 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */ 385 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */ 386 xvid_plugin_ssim_t ssim = { 0 }; 387 xvid_gbl_init_t xvid_gbl_init = { 0 }; 388 xvid_enc_create_t xvid_enc_create = { 0 }; 389 xvid_enc_plugin_t plugins[4]; 390 391 x->twopassfd = -1; 392 393 /* Bring in VOP flags from ffmpeg command-line */ 394 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */ 395 if (xvid_flags & AV_CODEC_FLAG_4MV) 396 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */ 397 if (avctx->trellis) 398 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */ 399 if (xvid_flags & AV_CODEC_FLAG_AC_PRED) 400 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */ 401 if (xvid_flags & AV_CODEC_FLAG_GRAY) 402 x->vop_flags |= XVID_VOP_GREYSCALE; 403 404 /* Decide which ME quality setting to use */ 405 x->me_flags = 0; 406 switch (x->me_quality) { 407 case 6: 408 case 5: 409 x->me_flags |= XVID_ME_EXTSEARCH16 | 410 XVID_ME_EXTSEARCH8; 411 case 4: 412 case 3: 413 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8 | 414 XVID_ME_HALFPELREFINE8 | 415 XVID_ME_CHROMA_PVOP | 416 XVID_ME_CHROMA_BVOP; 417 case 2: 418 case 1: 419 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16 | 420 XVID_ME_HALFPELREFINE16; 421 } 422 423 /* Decide how we should decide blocks */ 424 switch (avctx->mb_decision) { 425 case 2: 426 x->vop_flags |= XVID_VOP_MODEDECISION_RD; 427 x->me_flags |= XVID_ME_HALFPELREFINE8_RD | 428 XVID_ME_QUARTERPELREFINE8_RD | 429 XVID_ME_EXTSEARCH_RD | 430 XVID_ME_CHECKPREDICTION_RD; 431 case 1: 432 if (!(x->vop_flags & XVID_VOP_MODEDECISION_RD)) 433 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD; 434 x->me_flags |= XVID_ME_HALFPELREFINE16_RD | 435 XVID_ME_QUARTERPELREFINE16_RD; 436 default: 437 break; 438 } 439 440 /* Bring in VOL flags from ffmpeg command-line */ 441 x->vol_flags = 0; 442 if (x->gmc) { 443 x->vol_flags |= XVID_VOL_GMC; 444 x->me_flags |= XVID_ME_GME_REFINE; 445 } 446 if (xvid_flags & AV_CODEC_FLAG_QPEL) { 447 x->vol_flags |= XVID_VOL_QUARTERPEL; 448 x->me_flags |= XVID_ME_QUARTERPELREFINE16; 449 if (x->vop_flags & XVID_VOP_INTER4V) 450 x->me_flags |= XVID_ME_QUARTERPELREFINE8; 451 } 452 453 xvid_gbl_init.version = XVID_VERSION; 454 xvid_gbl_init.debug = 0; 455 xvid_gbl_init.cpu_flags = 0; 456 457 /* Initialize */ 458 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL); 459 460 /* Create the encoder reference */ 461 xvid_enc_create.version = XVID_VERSION; 462 463 /* Store the desired frame size */ 464 xvid_enc_create.width = 465 x->xsize = avctx->width; 466 xvid_enc_create.height = 467 x->ysize = avctx->height; 468 469 /* Xvid can determine the proper profile to use */ 470 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */ 471 472 /* We don't use zones */ 473 xvid_enc_create.zones = NULL; 474 xvid_enc_create.num_zones = 0; 475 476 xvid_enc_create.num_threads = avctx->thread_count; 477#if (XVID_VERSION <= 0x010303) && (XVID_VERSION >= 0x010300) 478 /* workaround for a bug in libxvidcore */ 479 if (avctx->height <= 16) { 480 if (avctx->thread_count < 2) { 481 xvid_enc_create.num_threads = 0; 482 } else { 483 av_log(avctx, AV_LOG_ERROR, 484 "Too small height for threads > 1."); 485 return AVERROR(EINVAL); 486 } 487 } 488#endif 489 490 xvid_enc_create.plugins = plugins; 491 xvid_enc_create.num_plugins = 0; 492 493 /* Initialize Buffers */ 494 x->twopassbuffer = NULL; 495 x->old_twopassbuffer = NULL; 496 x->twopassfile = NULL; 497 498 if (xvid_flags & AV_CODEC_FLAG_PASS1) { 499 rc2pass1.version = XVID_VERSION; 500 rc2pass1.context = x; 501 x->twopassbuffer = av_malloc(BUFFER_SIZE); 502 x->old_twopassbuffer = av_malloc(BUFFER_SIZE); 503 if (!x->twopassbuffer || !x->old_twopassbuffer) { 504 av_log(avctx, AV_LOG_ERROR, 505 "Xvid: Cannot allocate 2-pass log buffers\n"); 506 return AVERROR(ENOMEM); 507 } 508 x->twopassbuffer[0] = 509 x->old_twopassbuffer[0] = 0; 510 511 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass; 512 plugins[xvid_enc_create.num_plugins].param = &rc2pass1; 513 xvid_enc_create.num_plugins++; 514 } else if (xvid_flags & AV_CODEC_FLAG_PASS2) { 515 rc2pass2.version = XVID_VERSION; 516 rc2pass2.bitrate = avctx->bit_rate; 517 518 fd = avpriv_tempfile("xvidff.", &x->twopassfile, 0, avctx); 519 if (fd < 0) { 520 av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n"); 521 return fd; 522 } 523 x->twopassfd = fd; 524 525 if (!avctx->stats_in) { 526 av_log(avctx, AV_LOG_ERROR, 527 "Xvid: No 2-pass information loaded for second pass\n"); 528 return AVERROR(EINVAL); 529 } 530 531 ret = write(fd, avctx->stats_in, strlen(avctx->stats_in)); 532 if (ret == -1) 533 ret = AVERROR(errno); 534 else if (strlen(avctx->stats_in) > ret) { 535 av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write to 2-pass pipe\n"); 536 ret = AVERROR(EIO); 537 } 538 if (ret < 0) 539 return ret; 540 541 rc2pass2.filename = x->twopassfile; 542 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2; 543 plugins[xvid_enc_create.num_plugins].param = &rc2pass2; 544 xvid_enc_create.num_plugins++; 545 } else if (!(xvid_flags & AV_CODEC_FLAG_QSCALE)) { 546 /* Single Pass Bitrate Control! */ 547 single.version = XVID_VERSION; 548 single.bitrate = avctx->bit_rate; 549 550 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single; 551 plugins[xvid_enc_create.num_plugins].param = &single; 552 xvid_enc_create.num_plugins++; 553 } 554 555 if (avctx->lumi_masking != 0.0) 556 x->lumi_aq = 1; 557 558 /* Luminance Masking */ 559 if (x->lumi_aq) { 560 masking_l.method = 0; 561 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking; 562 563 /* The old behavior is that when avctx->lumi_masking is specified, 564 * plugins[...].param = NULL. Trying to keep the old behavior here. */ 565 plugins[xvid_enc_create.num_plugins].param = 566 avctx->lumi_masking ? NULL : &masking_l; 567 xvid_enc_create.num_plugins++; 568 } 569 570 /* Variance AQ */ 571 if (x->variance_aq) { 572 masking_v.method = 1; 573 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking; 574 plugins[xvid_enc_create.num_plugins].param = &masking_v; 575 xvid_enc_create.num_plugins++; 576 } 577 578 if (x->lumi_aq && x->variance_aq ) 579 av_log(avctx, AV_LOG_INFO, 580 "Both lumi_aq and variance_aq are enabled. The resulting quality" 581 "will be the worse one of the two effects made by the AQ.\n"); 582 583 /* SSIM */ 584 if (x->ssim) { 585 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim; 586 ssim.b_printstat = x->ssim == 2; 587 ssim.acc = x->ssim_acc; 588 ssim.cpu_flags = xvid_gbl_init.cpu_flags; 589 ssim.b_visualize = 0; 590 plugins[xvid_enc_create.num_plugins].param = &ssim; 591 xvid_enc_create.num_plugins++; 592 } 593 594 /* Frame Rate and Key Frames */ 595 xvid_correct_framerate(avctx); 596 xvid_enc_create.fincr = avctx->time_base.num; 597 xvid_enc_create.fbase = avctx->time_base.den; 598 if (avctx->gop_size > 0) 599 xvid_enc_create.max_key_interval = avctx->gop_size; 600 else 601 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */ 602 603 /* Quants */ 604 if (xvid_flags & AV_CODEC_FLAG_QSCALE) 605 x->qscale = 1; 606 else 607 x->qscale = 0; 608 609 xvid_enc_create.min_quant[0] = avctx->qmin; 610 xvid_enc_create.min_quant[1] = avctx->qmin; 611 xvid_enc_create.min_quant[2] = avctx->qmin; 612 xvid_enc_create.max_quant[0] = avctx->qmax; 613 xvid_enc_create.max_quant[1] = avctx->qmax; 614 xvid_enc_create.max_quant[2] = avctx->qmax; 615 616 /* Quant Matrices */ 617 x->intra_matrix = 618 x->inter_matrix = NULL; 619 620 if (x->mpeg_quant) 621 x->vol_flags |= XVID_VOL_MPEGQUANT; 622 if ((avctx->intra_matrix || avctx->inter_matrix)) { 623 x->vol_flags |= XVID_VOL_MPEGQUANT; 624 625 if (avctx->intra_matrix) { 626 intra = avctx->intra_matrix; 627 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64); 628 if (!x->intra_matrix) 629 return AVERROR(ENOMEM); 630 } else 631 intra = NULL; 632 if (avctx->inter_matrix) { 633 inter = avctx->inter_matrix; 634 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64); 635 if (!x->inter_matrix) 636 return AVERROR(ENOMEM); 637 } else 638 inter = NULL; 639 640 for (i = 0; i < 64; i++) { 641 if (intra) 642 x->intra_matrix[i] = (unsigned char) intra[i]; 643 if (inter) 644 x->inter_matrix[i] = (unsigned char) inter[i]; 645 } 646 } 647 648 /* Misc Settings */ 649 xvid_enc_create.frame_drop_ratio = 0; 650 xvid_enc_create.global = 0; 651 if (xvid_flags & AV_CODEC_FLAG_CLOSED_GOP) 652 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP; 653 654 /* Determines which codec mode we are operating in */ 655 avctx->extradata = NULL; 656 avctx->extradata_size = 0; 657 if (xvid_flags & AV_CODEC_FLAG_GLOBAL_HEADER) { 658 /* In this case, we are claiming to be MPEG-4 */ 659 x->quicktime_format = 1; 660 } else { 661 /* We are claiming to be Xvid */ 662 x->quicktime_format = 0; 663 if (!avctx->codec_tag) 664 avctx->codec_tag = AV_RL32("xvid"); 665 } 666 667 /* Bframes */ 668 xvid_enc_create.max_bframes = avctx->max_b_frames; 669 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset; 670 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor; 671 if (avctx->max_b_frames > 0 && !x->quicktime_format) 672 xvid_enc_create.global |= XVID_GLOBAL_PACKED; 673 674 av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins)); 675 676 /* Encode a dummy frame to get the extradata immediately */ 677 if (x->quicktime_format) { 678 AVFrame *picture; 679 AVPacket *packet; 680 int size, got_packet; 681 682 packet = av_packet_alloc(); 683 if (!packet) 684 return AVERROR(ENOMEM); 685 686 picture = av_frame_alloc(); 687 if (!picture) { 688 av_packet_free(&packet); 689 return AVERROR(ENOMEM); 690 } 691 692 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL); 693 if( xerr ) { 694 av_packet_free(&packet); 695 av_frame_free(&picture); 696 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n"); 697 return AVERROR_EXTERNAL; 698 } 699 x->encoder_handle = xvid_enc_create.handle; 700 size = ((avctx->width + 1) & ~1) * ((avctx->height + 1) & ~1); 701 picture->data[0] = av_malloc(size + size / 2); 702 if (!picture->data[0]) { 703 av_packet_free(&packet); 704 av_frame_free(&picture); 705 return AVERROR(ENOMEM); 706 } 707 picture->data[1] = picture->data[0] + size; 708 picture->data[2] = picture->data[1] + size / 4; 709 memset(picture->data[0], 0, size); 710 memset(picture->data[1], 128, size / 2); 711 xvid_encode_frame(avctx, packet, picture, &got_packet); 712 av_packet_free(&packet); 713 av_free(picture->data[0]); 714 av_frame_free(&picture); 715 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL); 716 } 717 718 /* Create encoder context */ 719 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL); 720 if (xerr) { 721 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n"); 722 return AVERROR_EXTERNAL; 723 } 724 725 x->encoder_handle = xvid_enc_create.handle; 726 727 return 0; 728} 729 730static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 731 const AVFrame *picture, int *got_packet) 732{ 733 int xerr, i, ret; 734 struct xvid_context *x = avctx->priv_data; 735 int mb_width = (avctx->width + 15) / 16; 736 int mb_height = (avctx->height + 15) / 16; 737 char *tmp; 738 739 xvid_enc_frame_t xvid_enc_frame = { 0 }; 740 xvid_enc_stats_t xvid_enc_stats = { 0 }; 741 742 if ((ret = ff_alloc_packet(avctx, pkt, mb_width*(int64_t)mb_height*MAX_MB_BYTES + AV_INPUT_BUFFER_MIN_SIZE)) < 0) 743 return ret; 744 745 /* Start setting up the frame */ 746 xvid_enc_frame.version = XVID_VERSION; 747 xvid_enc_stats.version = XVID_VERSION; 748 749 /* Let Xvid know where to put the frame. */ 750 xvid_enc_frame.bitstream = pkt->data; 751 xvid_enc_frame.length = pkt->size; 752 753 /* Initialize input image fields */ 754 if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) { 755 av_log(avctx, AV_LOG_ERROR, 756 "Xvid: Color spaces other than 420P not supported\n"); 757 return AVERROR(EINVAL); 758 } 759 760 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */ 761 762 for (i = 0; i < 4; i++) { 763 xvid_enc_frame.input.plane[i] = picture->data[i]; 764 xvid_enc_frame.input.stride[i] = picture->linesize[i]; 765 } 766 767 /* Encoder Flags */ 768 xvid_enc_frame.vop_flags = x->vop_flags; 769 xvid_enc_frame.vol_flags = x->vol_flags; 770 xvid_enc_frame.motion = x->me_flags; 771 xvid_enc_frame.type = 772 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP : 773 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP : 774 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP : 775 XVID_TYPE_AUTO; 776 777 /* Pixel aspect ratio setting */ 778 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 || 779 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) { 780 av_log(avctx, AV_LOG_WARNING, 781 "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n", 782 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den); 783 av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den, 784 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255); 785 } 786 xvid_enc_frame.par = XVID_PAR_EXT; 787 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num; 788 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den; 789 790 /* Quant Setting */ 791 if (x->qscale) 792 xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA; 793 else 794 xvid_enc_frame.quant = 0; 795 796 /* Matrices */ 797 xvid_enc_frame.quant_intra_matrix = x->intra_matrix; 798 xvid_enc_frame.quant_inter_matrix = x->inter_matrix; 799 800 /* Encode */ 801 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE, 802 &xvid_enc_frame, &xvid_enc_stats); 803 804 /* Two-pass log buffer swapping */ 805 avctx->stats_out = NULL; 806 if (x->twopassbuffer) { 807 tmp = x->old_twopassbuffer; 808 x->old_twopassbuffer = x->twopassbuffer; 809 x->twopassbuffer = tmp; 810 x->twopassbuffer[0] = 0; 811 if (x->old_twopassbuffer[0] != 0) { 812 avctx->stats_out = x->old_twopassbuffer; 813 } 814 } 815 816 if (xerr > 0) { 817 int pict_type; 818 819 *got_packet = 1; 820 821 if (xvid_enc_stats.type == XVID_TYPE_PVOP) 822 pict_type = AV_PICTURE_TYPE_P; 823 else if (xvid_enc_stats.type == XVID_TYPE_BVOP) 824 pict_type = AV_PICTURE_TYPE_B; 825 else if (xvid_enc_stats.type == XVID_TYPE_SVOP) 826 pict_type = AV_PICTURE_TYPE_S; 827 else 828 pict_type = AV_PICTURE_TYPE_I; 829 830 ff_side_data_set_encoder_stats(pkt, xvid_enc_stats.quant * FF_QP2LAMBDA, NULL, 0, pict_type); 831 832 if (xvid_enc_frame.out_flags & XVID_KEYFRAME) { 833 pkt->flags |= AV_PKT_FLAG_KEY; 834 if (x->quicktime_format) 835 return xvid_strip_vol_header(avctx, pkt, 836 xvid_enc_stats.hlength, xerr); 837 } 838 839 pkt->size = xerr; 840 841 return 0; 842 } else { 843 if (!xerr) 844 return 0; 845 av_log(avctx, AV_LOG_ERROR, 846 "Xvid: Encoding Error Occurred: %i\n", xerr); 847 return AVERROR_EXTERNAL; 848 } 849} 850 851static av_cold int xvid_encode_close(AVCodecContext *avctx) 852{ 853 struct xvid_context *x = avctx->priv_data; 854 855 if (x->encoder_handle) { 856 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL); 857 x->encoder_handle = NULL; 858 } 859 860 if (x->twopassbuffer) { 861 av_freep(&x->twopassbuffer); 862 av_freep(&x->old_twopassbuffer); 863 avctx->stats_out = NULL; 864 } 865 if (x->twopassfd>=0) { 866 unlink(x->twopassfile); 867 close(x->twopassfd); 868 x->twopassfd = -1; 869 } 870 av_freep(&x->twopassfile); 871 av_freep(&x->intra_matrix); 872 av_freep(&x->inter_matrix); 873 874 return 0; 875} 876 877#define OFFSET(x) offsetof(struct xvid_context, x) 878#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 879static const AVOption options[] = { 880 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, 881 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, 882 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" }, 883 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" }, 884 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" }, 885 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" }, 886 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE }, 887 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, 888 { "me_quality", "Motion estimation quality", OFFSET(me_quality), AV_OPT_TYPE_INT, { .i64 = 4 }, 0, 6, VE }, 889 { "mpeg_quant", "Use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, 890 { NULL }, 891}; 892 893static const AVClass xvid_class = { 894 .class_name = "libxvid", 895 .item_name = av_default_item_name, 896 .option = options, 897 .version = LIBAVUTIL_VERSION_INT, 898}; 899 900const FFCodec ff_libxvid_encoder = { 901 .p.name = "libxvid", 902 .p.long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"), 903 .p.type = AVMEDIA_TYPE_VIDEO, 904 .p.id = AV_CODEC_ID_MPEG4, 905 .priv_data_size = sizeof(struct xvid_context), 906 .init = xvid_encode_init, 907 FF_CODEC_ENCODE_CB(xvid_encode_frame), 908 .close = xvid_encode_close, 909 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, 910 .p.priv_class = &xvid_class, 911 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | 912 FF_CODEC_CAP_INIT_CLEANUP, 913 .p.wrapper_name = "libxvid", 914}; 915