2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
5 * This file is part of FFmpeg.
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.
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.
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
24 * Interface to xvidcore for MPEG-4 compliant encoding.
25 * @author Adam Thayer (krevnik@comcast.net)
31 #include "libavutil/file.h"
32 #include "libavutil/cpu.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mathematics.h"
36 #include "mpegvideo.h"
47 * Buffer management macros.
49 #define BUFFER_SIZE 1024
50 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
51 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
54 * Structure for the private Xvid context.
55 * This stores all the private context for the codec.
59 void *encoder_handle; /**< Handle for Xvid encoder */
60 int xsize; /**< Frame x size */
61 int ysize; /**< Frame y size */
62 int vop_flags; /**< VOP flags for Xvid encoder */
63 int vol_flags; /**< VOL flags for Xvid encoder */
64 int me_flags; /**< Motion Estimation flags */
65 int qscale; /**< Do we use constant scale? */
66 int quicktime_format; /**< Are we in a QT-based format? */
67 char *twopassbuffer; /**< Character buffer for two-pass */
68 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
69 char *twopassfile; /**< second pass temp file name */
71 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
72 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
73 int lumi_aq; /**< Lumi masking as an aq method */
74 int variance_aq; /**< Variance adaptive quantization */
75 int ssim; /**< SSIM information display mode */
76 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
81 * Structure for the private first-pass plugin.
83 struct xvid_ff_pass1 {
84 int version; /**< Xvid version */
85 struct xvid_context *context; /**< Pointer to private context */
88 static int xvid_encode_close(AVCodecContext *avctx);
91 * Xvid 2-Pass Kludge Section
93 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
94 * this section spends time replacing the first pass plugin so we can write
95 * statistic information as libavcodec requests in. We have another kludge
96 * that allows us to pass data to the second pass in Xvid without a custom
97 * rate-control plugin.
101 * Initialize the two-pass plugin and context.
103 * @param param Input construction parameter structure
104 * @param handle Private context handle
105 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
107 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
109 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
110 char *log = x->context->twopassbuffer;
112 /* Do a quick bounds check */
114 return XVID_ERR_FAIL;
116 /* We use snprintf() */
117 /* This is because we can safely prevent a buffer overflow */
119 snprintf(log, BUFFER_REMAINING(log),
120 "# ffmpeg 2-pass log file, using xvid codec\n");
121 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
122 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
123 XVID_VERSION_MAJOR(XVID_VERSION),
124 XVID_VERSION_MINOR(XVID_VERSION),
125 XVID_VERSION_PATCH(XVID_VERSION));
127 *handle = x->context;
132 * Destroy the two-pass plugin context.
134 * @param ref Context pointer for the plugin
135 * @param param Destrooy context
136 * @return Returns 0, success guaranteed
138 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
139 xvid_plg_destroy_t *param) {
140 /* Currently cannot think of anything to do on destruction */
141 /* Still, the framework should be here for reference/use */
142 if( ref->twopassbuffer != NULL )
143 ref->twopassbuffer[0] = 0;
148 * Enable fast encode mode during the first pass.
150 * @param ref Context pointer for the plugin
151 * @param param Frame data
152 * @return Returns 0, success guaranteed
154 static int xvid_ff_2pass_before(struct xvid_context *ref,
155 xvid_plg_data_t *param) {
157 int motion_replacements;
160 /* Nothing to do here, result is changed too much */
161 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
164 /* We can implement a 'turbo' first pass mode here */
168 motion_remove = ~XVID_ME_CHROMA_PVOP &
169 ~XVID_ME_CHROMA_BVOP &
170 ~XVID_ME_EXTSEARCH16 &
171 ~XVID_ME_ADVANCEDDIAMOND16;
172 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
173 XVID_ME_SKIP_DELTASEARCH |
174 XVID_ME_FASTREFINE16 |
175 XVID_ME_BFRAME_EARLYSTOP;
176 vop_remove = ~XVID_VOP_MODEDECISION_RD &
177 ~XVID_VOP_FAST_MODEDECISION_RD &
178 ~XVID_VOP_TRELLISQUANT &
182 param->vol_flags &= ~XVID_VOL_GMC;
183 param->vop_flags &= vop_remove;
184 param->motion_flags &= motion_remove;
185 param->motion_flags |= motion_replacements;
191 * Capture statistic data and write it during first pass.
193 * @param ref Context pointer for the plugin
194 * @param param Statistic data
195 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
197 static int xvid_ff_2pass_after(struct xvid_context *ref,
198 xvid_plg_data_t *param) {
199 char *log = ref->twopassbuffer;
200 const char *frame_types = " ipbs";
203 /* Quick bounds check */
205 return XVID_ERR_FAIL;
207 /* Convert the type given to us into a character */
208 if( param->type < 5 && param->type > 0 ) {
209 frame_type = frame_types[param->type];
211 return XVID_ERR_FAIL;
214 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
215 "%c %d %d %d %d %d %d\n",
216 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
217 param->stats.ublks, param->stats.length, param->stats.hlength);
223 * Dispatch function for our custom plugin.
224 * This handles the dispatch for the Xvid plugin. It passes data
225 * on to other functions for actual processing.
227 * @param ref Context pointer for the plugin
228 * @param cmd The task given for us to complete
229 * @param p1 First parameter (varies)
230 * @param p2 Second parameter (varies)
231 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
233 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
240 case XVID_PLG_BEFORE:
241 return xvid_ff_2pass_before(ref, p1);
243 case XVID_PLG_CREATE:
244 return xvid_ff_2pass_create(p1, p2);
247 return xvid_ff_2pass_after(ref, p1);
249 case XVID_PLG_DESTROY:
250 return xvid_ff_2pass_destroy(ref, p1);
253 return XVID_ERR_FAIL;
258 * Routine to create a global VO/VOL header for MP4 container.
259 * What we do here is extract the header from the Xvid bitstream
260 * as it is encoded. We also strip the repeated headers from the
261 * bitstream when a global header is requested for MPEG-4 ISO
264 * @param avctx AVCodecContext pointer to context
265 * @param frame Pointer to encoded frame data
266 * @param header_len Length of header to search
267 * @param frame_len Length of encoded frame data
268 * @return Returns new length of frame data
270 static int xvid_strip_vol_header(AVCodecContext *avctx,
272 unsigned int header_len,
273 unsigned int frame_len) {
276 for( i = 0; i < header_len - 3; i++ ) {
277 if( pkt->data[i] == 0x00 &&
278 pkt->data[i+1] == 0x00 &&
279 pkt->data[i+2] == 0x01 &&
280 pkt->data[i+3] == 0xB6 ) {
287 /* We need to store the header, so extract it */
288 if( avctx->extradata == NULL ) {
289 avctx->extradata = av_malloc(vo_len);
290 memcpy(avctx->extradata, pkt->data, vo_len);
291 avctx->extradata_size = vo_len;
293 /* Less dangerous now, memmove properly copies the two
294 chunks of overlapping data */
295 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
296 pkt->size = frame_len - vo_len;
302 * Routine to correct a possibly erroneous framerate being fed to us.
303 * Xvid currently chokes on framerates where the ticks per frame is
304 * extremely large. This function works to correct problems in this area
305 * by estimating a new framerate and taking the simpler fraction of
308 * @param avctx Context that contains the framerate to correct.
310 static void xvid_correct_framerate(AVCodecContext *avctx)
313 int est_frate, est_fbase;
317 frate = avctx->time_base.den;
318 fbase = avctx->time_base.num;
320 gcd = av_gcd(frate, fbase);
326 if( frate <= 65000 && fbase <= 65000 ) {
327 avctx->time_base.den = frate;
328 avctx->time_base.num = fbase;
332 fps = (float)frate / (float)fbase;
333 est_fps = roundf(fps * 1000.0) / 1000.0;
335 est_frate = (int)est_fps;
336 if( est_fps > (int)est_fps ) {
337 est_frate = (est_frate + 1) * 1000;
338 est_fbase = (int)roundf((float)est_frate / est_fps);
342 gcd = av_gcd(est_frate, est_fbase);
348 if( fbase > est_fbase ) {
349 avctx->time_base.den = est_frate;
350 avctx->time_base.num = est_fbase;
351 av_log(avctx, AV_LOG_DEBUG,
352 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
353 est_fps, (((est_fps - fps)/fps) * 100.0));
355 avctx->time_base.den = frate;
356 avctx->time_base.num = fbase;
360 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
362 int xvid_flags = avctx->flags;
363 struct xvid_context *x = avctx->priv_data;
364 uint16_t *intra, *inter;
367 xvid_plugin_single_t single = { 0 };
368 struct xvid_ff_pass1 rc2pass1 = { 0 };
369 xvid_plugin_2pass2_t rc2pass2 = { 0 };
370 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
371 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
372 xvid_plugin_ssim_t ssim = { 0 };
373 xvid_gbl_init_t xvid_gbl_init = { 0 };
374 xvid_enc_create_t xvid_enc_create = { 0 };
375 xvid_enc_plugin_t plugins[4];
379 /* Bring in VOP flags from ffmpeg command-line */
380 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
381 if( xvid_flags & CODEC_FLAG_4MV )
382 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
384 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
385 if( xvid_flags & CODEC_FLAG_AC_PRED )
386 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
387 if( xvid_flags & CODEC_FLAG_GRAY )
388 x->vop_flags |= XVID_VOP_GREYSCALE;
390 /* Decide which ME quality setting to use */
392 switch( avctx->me_method ) {
393 case ME_FULL: /* Quality 6 */
394 x->me_flags |= XVID_ME_EXTSEARCH16
395 | XVID_ME_EXTSEARCH8;
397 case ME_EPZS: /* Quality 4 */
398 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
399 | XVID_ME_HALFPELREFINE8
400 | XVID_ME_CHROMA_PVOP
401 | XVID_ME_CHROMA_BVOP;
403 case ME_LOG: /* Quality 2 */
406 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
407 | XVID_ME_HALFPELREFINE16;
409 case ME_ZERO: /* Quality 0 */
414 /* Decide how we should decide blocks */
415 switch( avctx->mb_decision ) {
417 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
418 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
419 | XVID_ME_QUARTERPELREFINE8_RD
420 | XVID_ME_EXTSEARCH_RD
421 | XVID_ME_CHECKPREDICTION_RD;
423 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
424 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
425 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
426 | XVID_ME_QUARTERPELREFINE16_RD;
432 /* Bring in VOL flags from ffmpeg command-line */
434 if (avctx->flags & CODEC_FLAG_GMC)
440 x->vol_flags |= XVID_VOL_GMC;
441 x->me_flags |= XVID_ME_GME_REFINE;
443 if( xvid_flags & CODEC_FLAG_QPEL ) {
444 x->vol_flags |= XVID_VOL_QUARTERPEL;
445 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
446 if( x->vop_flags & XVID_VOP_INTER4V )
447 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
450 xvid_gbl_init.version = XVID_VERSION;
451 xvid_gbl_init.debug = 0;
452 xvid_gbl_init.cpu_flags = 0;
455 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
457 /* Create the encoder reference */
458 xvid_enc_create.version = XVID_VERSION;
460 /* Store the desired frame size */
461 xvid_enc_create.width = x->xsize = avctx->width;
462 xvid_enc_create.height = x->ysize = avctx->height;
464 /* Xvid can determine the proper profile to use */
465 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
467 /* We don't use zones */
468 xvid_enc_create.zones = NULL;
469 xvid_enc_create.num_zones = 0;
471 xvid_enc_create.num_threads = avctx->thread_count;
473 xvid_enc_create.plugins = plugins;
474 xvid_enc_create.num_plugins = 0;
476 /* Initialize Buffers */
477 x->twopassbuffer = NULL;
478 x->old_twopassbuffer = NULL;
479 x->twopassfile = NULL;
481 if( xvid_flags & CODEC_FLAG_PASS1 ) {
482 rc2pass1.version = XVID_VERSION;
483 rc2pass1.context = x;
484 x->twopassbuffer = av_malloc(BUFFER_SIZE);
485 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
486 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
487 av_log(avctx, AV_LOG_ERROR,
488 "Xvid: Cannot allocate 2-pass log buffers\n");
491 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
493 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
494 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
495 xvid_enc_create.num_plugins++;
496 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
497 rc2pass2.version = XVID_VERSION;
498 rc2pass2.bitrate = avctx->bit_rate;
500 fd = av_tempfile("xvidff.", &x->twopassfile, 0, avctx);
502 av_log(avctx, AV_LOG_ERROR,
503 "Xvid: Cannot write 2-pass pipe\n");
508 if( avctx->stats_in == NULL ) {
509 av_log(avctx, AV_LOG_ERROR,
510 "Xvid: No 2-pass information loaded for second pass\n");
514 if( strlen(avctx->stats_in) >
515 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
516 av_log(avctx, AV_LOG_ERROR,
517 "Xvid: Cannot write to 2-pass pipe\n");
521 rc2pass2.filename = x->twopassfile;
522 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
523 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
524 xvid_enc_create.num_plugins++;
525 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
526 /* Single Pass Bitrate Control! */
527 single.version = XVID_VERSION;
528 single.bitrate = avctx->bit_rate;
530 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
531 plugins[xvid_enc_create.num_plugins].param = &single;
532 xvid_enc_create.num_plugins++;
535 if (avctx->lumi_masking != 0.0)
538 /* Luminance Masking */
540 masking_l.method = 0;
541 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
543 /* The old behavior is that when avctx->lumi_masking is specified,
544 * plugins[...].param = NULL. Trying to keep the old behavior here. */
545 plugins[xvid_enc_create.num_plugins].param = avctx->lumi_masking ? NULL
547 xvid_enc_create.num_plugins++;
551 if (x->variance_aq) {
552 masking_v.method = 1;
553 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
554 plugins[xvid_enc_create.num_plugins].param = &masking_v;
555 xvid_enc_create.num_plugins++;
558 if( x->lumi_aq && x->variance_aq )
559 av_log(avctx, AV_LOG_INFO,
560 "Both lumi_aq and variance_aq are enabled. The resulting quality"
561 "will be the worse one of the two effects made by the AQ.\n");
565 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
566 ssim.b_printstat = x->ssim == 2;
567 ssim.acc = x->ssim_acc;
568 ssim.cpu_flags = xvid_gbl_init.cpu_flags;
569 ssim.b_visualize = 0;
570 plugins[xvid_enc_create.num_plugins].param = &ssim;
571 xvid_enc_create.num_plugins++;
574 /* Frame Rate and Key Frames */
575 xvid_correct_framerate(avctx);
576 xvid_enc_create.fincr = avctx->time_base.num;
577 xvid_enc_create.fbase = avctx->time_base.den;
578 if( avctx->gop_size > 0 )
579 xvid_enc_create.max_key_interval = avctx->gop_size;
581 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
584 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
587 xvid_enc_create.min_quant[0] = avctx->qmin;
588 xvid_enc_create.min_quant[1] = avctx->qmin;
589 xvid_enc_create.min_quant[2] = avctx->qmin;
590 xvid_enc_create.max_quant[0] = avctx->qmax;
591 xvid_enc_create.max_quant[1] = avctx->qmax;
592 xvid_enc_create.max_quant[2] = avctx->qmax;
595 x->intra_matrix = x->inter_matrix = NULL;
596 if( avctx->mpeg_quant )
597 x->vol_flags |= XVID_VOL_MPEGQUANT;
598 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
599 x->vol_flags |= XVID_VOL_MPEGQUANT;
601 if( avctx->intra_matrix ) {
602 intra = avctx->intra_matrix;
603 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
606 if( avctx->inter_matrix ) {
607 inter = avctx->inter_matrix;
608 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
612 for( i = 0; i < 64; i++ ) {
614 x->intra_matrix[i] = (unsigned char)intra[i];
616 x->inter_matrix[i] = (unsigned char)inter[i];
621 xvid_enc_create.frame_drop_ratio = 0;
622 xvid_enc_create.global = 0;
623 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
624 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
626 /* Determines which codec mode we are operating in */
627 avctx->extradata = NULL;
628 avctx->extradata_size = 0;
629 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
630 /* In this case, we are claiming to be MPEG4 */
631 x->quicktime_format = 1;
632 avctx->codec_id = AV_CODEC_ID_MPEG4;
634 /* We are claiming to be Xvid */
635 x->quicktime_format = 0;
636 if(!avctx->codec_tag)
637 avctx->codec_tag = AV_RL32("xvid");
641 xvid_enc_create.max_bframes = avctx->max_b_frames;
642 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
643 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
644 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
646 av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
648 /* Create encoder context */
649 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
651 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
655 x->encoder_handle = xvid_enc_create.handle;
656 avctx->coded_frame = av_frame_alloc();
657 if (!avctx->coded_frame)
658 return AVERROR(ENOMEM);
662 xvid_encode_close(avctx);
666 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
667 const AVFrame *picture, int *got_packet)
669 int xerr, i, ret, user_packet = !!pkt->data;
671 struct xvid_context *x = avctx->priv_data;
672 AVFrame *p = avctx->coded_frame;
673 int mb_width = (avctx->width + 15) / 16;
674 int mb_height = (avctx->height + 15) / 16;
676 xvid_enc_frame_t xvid_enc_frame = { 0 };
677 xvid_enc_stats_t xvid_enc_stats = { 0 };
679 if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0)
682 /* Start setting up the frame */
683 xvid_enc_frame.version = XVID_VERSION;
684 xvid_enc_stats.version = XVID_VERSION;
686 /* Let Xvid know where to put the frame. */
687 xvid_enc_frame.bitstream = pkt->data;
688 xvid_enc_frame.length = pkt->size;
690 /* Initialize input image fields */
691 if( avctx->pix_fmt != AV_PIX_FMT_YUV420P ) {
692 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
693 return AVERROR(EINVAL);
696 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
698 for( i = 0; i < 4; i++ ) {
699 xvid_enc_frame.input.plane[i] = picture->data[i];
700 xvid_enc_frame.input.stride[i] = picture->linesize[i];
704 xvid_enc_frame.vop_flags = x->vop_flags;
705 xvid_enc_frame.vol_flags = x->vol_flags;
706 xvid_enc_frame.motion = x->me_flags;
707 xvid_enc_frame.type =
708 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
709 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
710 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
713 /* Pixel aspect ratio setting */
714 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
715 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
716 av_log(avctx, AV_LOG_WARNING,
717 "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
718 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
719 av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
720 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
722 xvid_enc_frame.par = XVID_PAR_EXT;
723 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
724 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
727 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
728 else xvid_enc_frame.quant = 0;
731 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
732 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
735 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
736 &xvid_enc_frame, &xvid_enc_stats);
738 /* Two-pass log buffer swapping */
739 avctx->stats_out = NULL;
740 if( x->twopassbuffer ) {
741 tmp = x->old_twopassbuffer;
742 x->old_twopassbuffer = x->twopassbuffer;
743 x->twopassbuffer = tmp;
744 x->twopassbuffer[0] = 0;
745 if( x->old_twopassbuffer[0] != 0 ) {
746 avctx->stats_out = x->old_twopassbuffer;
753 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
754 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
755 p->pict_type = AV_PICTURE_TYPE_P;
756 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
757 p->pict_type = AV_PICTURE_TYPE_B;
758 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
759 p->pict_type = AV_PICTURE_TYPE_S;
761 p->pict_type = AV_PICTURE_TYPE_I;
762 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
764 pkt->flags |= AV_PKT_FLAG_KEY;
765 if( x->quicktime_format )
766 return xvid_strip_vol_header(avctx, pkt,
767 xvid_enc_stats.hlength, xerr);
779 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
780 return AVERROR_EXTERNAL;
784 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
785 struct xvid_context *x = avctx->priv_data;
787 if(x->encoder_handle)
788 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
789 x->encoder_handle = NULL;
791 av_freep(&avctx->extradata);
792 if( x->twopassbuffer != NULL ) {
793 av_freep(&x->twopassbuffer);
794 av_freep(&x->old_twopassbuffer);
795 avctx->stats_out = NULL;
797 if (x->twopassfd>=0) {
798 unlink(x->twopassfile);
802 av_freep(&x->twopassfile);
803 av_freep(&x->intra_matrix);
804 av_freep(&x->inter_matrix);
809 #define OFFSET(x) offsetof(struct xvid_context, x)
810 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
811 static const AVOption options[] = {
812 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
813 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
814 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
815 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
816 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
817 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
818 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
819 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
823 static const AVClass xvid_class = {
824 .class_name = "libxvid",
825 .item_name = av_default_item_name,
827 .version = LIBAVUTIL_VERSION_INT,
830 AVCodec ff_libxvid_encoder = {
832 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
833 .type = AVMEDIA_TYPE_VIDEO,
834 .id = AV_CODEC_ID_MPEG4,
835 .priv_data_size = sizeof(struct xvid_context),
836 .init = xvid_encode_init,
837 .encode2 = xvid_encode_frame,
838 .close = xvid_encode_close,
839 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
840 .priv_class = &xvid_class,