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"
43 * Buffer management macros.
45 #define BUFFER_SIZE 1024
46 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
47 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
50 * Structure for the private Xvid context.
51 * This stores all the private context for the codec.
55 void *encoder_handle; /**< Handle for Xvid encoder */
56 int xsize; /**< Frame x size */
57 int ysize; /**< Frame y size */
58 int vop_flags; /**< VOP flags for Xvid encoder */
59 int vol_flags; /**< VOL flags for Xvid encoder */
60 int me_flags; /**< Motion Estimation flags */
61 int qscale; /**< Do we use constant scale? */
62 int quicktime_format; /**< Are we in a QT-based format? */
63 char *twopassbuffer; /**< Character buffer for two-pass */
64 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
65 char *twopassfile; /**< second pass temp file name */
67 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
68 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
69 int lumi_aq; /**< Lumi masking as an aq method */
70 int variance_aq; /**< Variance adaptive quantization */
71 int ssim; /**< SSIM information display mode */
72 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
77 * Structure for the private first-pass plugin.
79 struct xvid_ff_pass1 {
80 int version; /**< Xvid version */
81 struct xvid_context *context; /**< Pointer to private context */
84 static int xvid_encode_close(AVCodecContext *avctx);
87 * Xvid 2-Pass Kludge Section
89 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
90 * this section spends time replacing the first pass plugin so we can write
91 * statistic information as libavcodec requests in. We have another kludge
92 * that allows us to pass data to the second pass in Xvid without a custom
93 * rate-control plugin.
97 * Initialize the two-pass plugin and context.
99 * @param param Input construction parameter structure
100 * @param handle Private context handle
101 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
103 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
105 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
106 char *log = x->context->twopassbuffer;
108 /* Do a quick bounds check */
110 return XVID_ERR_FAIL;
112 /* We use snprintf() */
113 /* This is because we can safely prevent a buffer overflow */
115 snprintf(log, BUFFER_REMAINING(log),
116 "# ffmpeg 2-pass log file, using xvid codec\n");
117 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
118 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
119 XVID_VERSION_MAJOR(XVID_VERSION),
120 XVID_VERSION_MINOR(XVID_VERSION),
121 XVID_VERSION_PATCH(XVID_VERSION));
123 *handle = x->context;
128 * Destroy the two-pass plugin context.
130 * @param ref Context pointer for the plugin
131 * @param param Destrooy context
132 * @return Returns 0, success guaranteed
134 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
135 xvid_plg_destroy_t *param) {
136 /* Currently cannot think of anything to do on destruction */
137 /* Still, the framework should be here for reference/use */
138 if( ref->twopassbuffer != NULL )
139 ref->twopassbuffer[0] = 0;
144 * Enable fast encode mode during the first pass.
146 * @param ref Context pointer for the plugin
147 * @param param Frame data
148 * @return Returns 0, success guaranteed
150 static int xvid_ff_2pass_before(struct xvid_context *ref,
151 xvid_plg_data_t *param) {
153 int motion_replacements;
156 /* Nothing to do here, result is changed too much */
157 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
160 /* We can implement a 'turbo' first pass mode here */
164 motion_remove = ~XVID_ME_CHROMA_PVOP &
165 ~XVID_ME_CHROMA_BVOP &
166 ~XVID_ME_EXTSEARCH16 &
167 ~XVID_ME_ADVANCEDDIAMOND16;
168 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
169 XVID_ME_SKIP_DELTASEARCH |
170 XVID_ME_FASTREFINE16 |
171 XVID_ME_BFRAME_EARLYSTOP;
172 vop_remove = ~XVID_VOP_MODEDECISION_RD &
173 ~XVID_VOP_FAST_MODEDECISION_RD &
174 ~XVID_VOP_TRELLISQUANT &
178 param->vol_flags &= ~XVID_VOL_GMC;
179 param->vop_flags &= vop_remove;
180 param->motion_flags &= motion_remove;
181 param->motion_flags |= motion_replacements;
187 * Capture statistic data and write it during first pass.
189 * @param ref Context pointer for the plugin
190 * @param param Statistic data
191 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
193 static int xvid_ff_2pass_after(struct xvid_context *ref,
194 xvid_plg_data_t *param) {
195 char *log = ref->twopassbuffer;
196 const char *frame_types = " ipbs";
199 /* Quick bounds check */
201 return XVID_ERR_FAIL;
203 /* Convert the type given to us into a character */
204 if( param->type < 5 && param->type > 0 ) {
205 frame_type = frame_types[param->type];
207 return XVID_ERR_FAIL;
210 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
211 "%c %d %d %d %d %d %d\n",
212 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
213 param->stats.ublks, param->stats.length, param->stats.hlength);
219 * Dispatch function for our custom plugin.
220 * This handles the dispatch for the Xvid plugin. It passes data
221 * on to other functions for actual processing.
223 * @param ref Context pointer for the plugin
224 * @param cmd The task given for us to complete
225 * @param p1 First parameter (varies)
226 * @param p2 Second parameter (varies)
227 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
229 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
236 case XVID_PLG_BEFORE:
237 return xvid_ff_2pass_before(ref, p1);
239 case XVID_PLG_CREATE:
240 return xvid_ff_2pass_create(p1, p2);
243 return xvid_ff_2pass_after(ref, p1);
245 case XVID_PLG_DESTROY:
246 return xvid_ff_2pass_destroy(ref, p1);
249 return XVID_ERR_FAIL;
254 * Routine to create a global VO/VOL header for MP4 container.
255 * What we do here is extract the header from the Xvid bitstream
256 * as it is encoded. We also strip the repeated headers from the
257 * bitstream when a global header is requested for MPEG-4 ISO
260 * @param avctx AVCodecContext pointer to context
261 * @param frame Pointer to encoded frame data
262 * @param header_len Length of header to search
263 * @param frame_len Length of encoded frame data
264 * @return Returns new length of frame data
266 static int xvid_strip_vol_header(AVCodecContext *avctx,
268 unsigned int header_len,
269 unsigned int frame_len) {
272 for( i = 0; i < header_len - 3; i++ ) {
273 if( pkt->data[i] == 0x00 &&
274 pkt->data[i+1] == 0x00 &&
275 pkt->data[i+2] == 0x01 &&
276 pkt->data[i+3] == 0xB6 ) {
283 /* We need to store the header, so extract it */
284 if( avctx->extradata == NULL ) {
285 avctx->extradata = av_malloc(vo_len);
286 memcpy(avctx->extradata, pkt->data, vo_len);
287 avctx->extradata_size = vo_len;
289 /* Less dangerous now, memmove properly copies the two
290 chunks of overlapping data */
291 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
292 pkt->size = frame_len - vo_len;
298 * Routine to correct a possibly erroneous framerate being fed to us.
299 * Xvid currently chokes on framerates where the ticks per frame is
300 * extremely large. This function works to correct problems in this area
301 * by estimating a new framerate and taking the simpler fraction of
304 * @param avctx Context that contains the framerate to correct.
306 static void xvid_correct_framerate(AVCodecContext *avctx)
309 int est_frate, est_fbase;
313 frate = avctx->time_base.den;
314 fbase = avctx->time_base.num;
316 gcd = av_gcd(frate, fbase);
322 if( frate <= 65000 && fbase <= 65000 ) {
323 avctx->time_base.den = frate;
324 avctx->time_base.num = fbase;
328 fps = (float)frate / (float)fbase;
329 est_fps = roundf(fps * 1000.0) / 1000.0;
331 est_frate = (int)est_fps;
332 if( est_fps > (int)est_fps ) {
333 est_frate = (est_frate + 1) * 1000;
334 est_fbase = (int)roundf((float)est_frate / est_fps);
338 gcd = av_gcd(est_frate, est_fbase);
344 if( fbase > est_fbase ) {
345 avctx->time_base.den = est_frate;
346 avctx->time_base.num = est_fbase;
347 av_log(avctx, AV_LOG_DEBUG,
348 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
349 est_fps, (((est_fps - fps)/fps) * 100.0));
351 avctx->time_base.den = frate;
352 avctx->time_base.num = fbase;
356 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
358 int xvid_flags = avctx->flags;
359 struct xvid_context *x = avctx->priv_data;
360 uint16_t *intra, *inter;
363 xvid_plugin_single_t single = { 0 };
364 struct xvid_ff_pass1 rc2pass1 = { 0 };
365 xvid_plugin_2pass2_t rc2pass2 = { 0 };
366 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
367 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
368 xvid_plugin_ssim_t ssim = { 0 };
369 xvid_gbl_init_t xvid_gbl_init = { 0 };
370 xvid_enc_create_t xvid_enc_create = { 0 };
371 xvid_enc_plugin_t plugins[4];
375 /* Bring in VOP flags from ffmpeg command-line */
376 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
377 if( xvid_flags & CODEC_FLAG_4MV )
378 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
380 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
381 if( xvid_flags & CODEC_FLAG_AC_PRED )
382 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
383 if( xvid_flags & CODEC_FLAG_GRAY )
384 x->vop_flags |= XVID_VOP_GREYSCALE;
386 /* Decide which ME quality setting to use */
388 switch( avctx->me_method ) {
389 case ME_FULL: /* Quality 6 */
390 x->me_flags |= XVID_ME_EXTSEARCH16
391 | XVID_ME_EXTSEARCH8;
393 case ME_EPZS: /* Quality 4 */
394 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
395 | XVID_ME_HALFPELREFINE8
396 | XVID_ME_CHROMA_PVOP
397 | XVID_ME_CHROMA_BVOP;
399 case ME_LOG: /* Quality 2 */
402 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
403 | XVID_ME_HALFPELREFINE16;
405 case ME_ZERO: /* Quality 0 */
410 /* Decide how we should decide blocks */
411 switch( avctx->mb_decision ) {
413 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
414 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
415 | XVID_ME_QUARTERPELREFINE8_RD
416 | XVID_ME_EXTSEARCH_RD
417 | XVID_ME_CHECKPREDICTION_RD;
419 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
420 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
421 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
422 | XVID_ME_QUARTERPELREFINE16_RD;
428 /* Bring in VOL flags from ffmpeg command-line */
430 if (avctx->flags & CODEC_FLAG_GMC)
436 x->vol_flags |= XVID_VOL_GMC;
437 x->me_flags |= XVID_ME_GME_REFINE;
439 if( xvid_flags & CODEC_FLAG_QPEL ) {
440 x->vol_flags |= XVID_VOL_QUARTERPEL;
441 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
442 if( x->vop_flags & XVID_VOP_INTER4V )
443 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
446 xvid_gbl_init.version = XVID_VERSION;
447 xvid_gbl_init.debug = 0;
448 xvid_gbl_init.cpu_flags = 0;
451 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
453 /* Create the encoder reference */
454 xvid_enc_create.version = XVID_VERSION;
456 /* Store the desired frame size */
457 xvid_enc_create.width = x->xsize = avctx->width;
458 xvid_enc_create.height = x->ysize = avctx->height;
460 /* Xvid can determine the proper profile to use */
461 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
463 /* We don't use zones */
464 xvid_enc_create.zones = NULL;
465 xvid_enc_create.num_zones = 0;
467 xvid_enc_create.num_threads = avctx->thread_count;
469 xvid_enc_create.plugins = plugins;
470 xvid_enc_create.num_plugins = 0;
472 /* Initialize Buffers */
473 x->twopassbuffer = NULL;
474 x->old_twopassbuffer = NULL;
475 x->twopassfile = NULL;
477 if( xvid_flags & CODEC_FLAG_PASS1 ) {
478 rc2pass1.version = XVID_VERSION;
479 rc2pass1.context = x;
480 x->twopassbuffer = av_malloc(BUFFER_SIZE);
481 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
482 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
483 av_log(avctx, AV_LOG_ERROR,
484 "Xvid: Cannot allocate 2-pass log buffers\n");
487 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
489 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
490 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
491 xvid_enc_create.num_plugins++;
492 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
493 rc2pass2.version = XVID_VERSION;
494 rc2pass2.bitrate = avctx->bit_rate;
496 fd = av_tempfile("xvidff.", &x->twopassfile, 0, avctx);
498 av_log(avctx, AV_LOG_ERROR,
499 "Xvid: Cannot write 2-pass pipe\n");
504 if( avctx->stats_in == NULL ) {
505 av_log(avctx, AV_LOG_ERROR,
506 "Xvid: No 2-pass information loaded for second pass\n");
510 if( strlen(avctx->stats_in) >
511 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
512 av_log(avctx, AV_LOG_ERROR,
513 "Xvid: Cannot write to 2-pass pipe\n");
517 rc2pass2.filename = x->twopassfile;
518 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
519 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
520 xvid_enc_create.num_plugins++;
521 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
522 /* Single Pass Bitrate Control! */
523 single.version = XVID_VERSION;
524 single.bitrate = avctx->bit_rate;
526 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
527 plugins[xvid_enc_create.num_plugins].param = &single;
528 xvid_enc_create.num_plugins++;
531 if (avctx->lumi_masking != 0.0)
534 /* Luminance Masking */
536 masking_l.method = 0;
537 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
539 /* The old behavior is that when avctx->lumi_masking is specified,
540 * plugins[...].param = NULL. Trying to keep the old behavior here. */
541 plugins[xvid_enc_create.num_plugins].param = avctx->lumi_masking ? NULL
543 xvid_enc_create.num_plugins++;
547 if (x->variance_aq) {
548 masking_v.method = 1;
549 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
550 plugins[xvid_enc_create.num_plugins].param = &masking_v;
551 xvid_enc_create.num_plugins++;
554 if( x->lumi_aq && x->variance_aq )
555 av_log(avctx, AV_LOG_INFO,
556 "Both lumi_aq and variance_aq are enabled. The resulting quality"
557 "will be the worse one of the two effects made by the AQ.\n");
561 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
562 ssim.b_printstat = x->ssim == 2;
563 ssim.acc = x->ssim_acc;
564 ssim.cpu_flags = xvid_gbl_init.cpu_flags;
565 ssim.b_visualize = 0;
566 plugins[xvid_enc_create.num_plugins].param = &ssim;
567 xvid_enc_create.num_plugins++;
570 /* Frame Rate and Key Frames */
571 xvid_correct_framerate(avctx);
572 xvid_enc_create.fincr = avctx->time_base.num;
573 xvid_enc_create.fbase = avctx->time_base.den;
574 if( avctx->gop_size > 0 )
575 xvid_enc_create.max_key_interval = avctx->gop_size;
577 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
580 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
583 xvid_enc_create.min_quant[0] = avctx->qmin;
584 xvid_enc_create.min_quant[1] = avctx->qmin;
585 xvid_enc_create.min_quant[2] = avctx->qmin;
586 xvid_enc_create.max_quant[0] = avctx->qmax;
587 xvid_enc_create.max_quant[1] = avctx->qmax;
588 xvid_enc_create.max_quant[2] = avctx->qmax;
591 x->intra_matrix = x->inter_matrix = NULL;
592 if( avctx->mpeg_quant )
593 x->vol_flags |= XVID_VOL_MPEGQUANT;
594 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
595 x->vol_flags |= XVID_VOL_MPEGQUANT;
597 if( avctx->intra_matrix ) {
598 intra = avctx->intra_matrix;
599 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
602 if( avctx->inter_matrix ) {
603 inter = avctx->inter_matrix;
604 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
608 for( i = 0; i < 64; i++ ) {
610 x->intra_matrix[i] = (unsigned char)intra[i];
612 x->inter_matrix[i] = (unsigned char)inter[i];
617 xvid_enc_create.frame_drop_ratio = 0;
618 xvid_enc_create.global = 0;
619 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
620 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
622 /* Determines which codec mode we are operating in */
623 avctx->extradata = NULL;
624 avctx->extradata_size = 0;
625 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
626 /* In this case, we are claiming to be MPEG4 */
627 x->quicktime_format = 1;
628 avctx->codec_id = AV_CODEC_ID_MPEG4;
630 /* We are claiming to be Xvid */
631 x->quicktime_format = 0;
632 if(!avctx->codec_tag)
633 avctx->codec_tag = AV_RL32("xvid");
637 xvid_enc_create.max_bframes = avctx->max_b_frames;
638 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
639 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
640 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
642 av_assert0(xvid_enc_create.num_plugins + (!!x->ssim) + (!!x->variance_aq) + (!!x->lumi_aq) <= FF_ARRAY_ELEMS(plugins));
644 /* Create encoder context */
645 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
647 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
651 x->encoder_handle = xvid_enc_create.handle;
652 avctx->coded_frame = av_frame_alloc();
653 if (!avctx->coded_frame)
654 return AVERROR(ENOMEM);
658 xvid_encode_close(avctx);
662 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
663 const AVFrame *picture, int *got_packet)
665 int xerr, i, ret, user_packet = !!pkt->data;
667 struct xvid_context *x = avctx->priv_data;
668 AVFrame *p = avctx->coded_frame;
669 int mb_width = (avctx->width + 15) / 16;
670 int mb_height = (avctx->height + 15) / 16;
672 xvid_enc_frame_t xvid_enc_frame = { 0 };
673 xvid_enc_stats_t xvid_enc_stats = { 0 };
675 if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0)
678 /* Start setting up the frame */
679 xvid_enc_frame.version = XVID_VERSION;
680 xvid_enc_stats.version = XVID_VERSION;
682 /* Let Xvid know where to put the frame. */
683 xvid_enc_frame.bitstream = pkt->data;
684 xvid_enc_frame.length = pkt->size;
686 /* Initialize input image fields */
687 if( avctx->pix_fmt != AV_PIX_FMT_YUV420P ) {
688 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
689 return AVERROR(EINVAL);
692 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
694 for( i = 0; i < 4; i++ ) {
695 xvid_enc_frame.input.plane[i] = picture->data[i];
696 xvid_enc_frame.input.stride[i] = picture->linesize[i];
700 xvid_enc_frame.vop_flags = x->vop_flags;
701 xvid_enc_frame.vol_flags = x->vol_flags;
702 xvid_enc_frame.motion = x->me_flags;
703 xvid_enc_frame.type =
704 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
705 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
706 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
709 /* Pixel aspect ratio setting */
710 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
711 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
712 av_log(avctx, AV_LOG_WARNING,
713 "Invalid pixel aspect ratio %i/%i, limit is 255/255 reducing\n",
714 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
715 av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
716 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 255);
718 xvid_enc_frame.par = XVID_PAR_EXT;
719 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
720 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
723 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
724 else xvid_enc_frame.quant = 0;
727 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
728 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
731 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
732 &xvid_enc_frame, &xvid_enc_stats);
734 /* Two-pass log buffer swapping */
735 avctx->stats_out = NULL;
736 if( x->twopassbuffer ) {
737 tmp = x->old_twopassbuffer;
738 x->old_twopassbuffer = x->twopassbuffer;
739 x->twopassbuffer = tmp;
740 x->twopassbuffer[0] = 0;
741 if( x->old_twopassbuffer[0] != 0 ) {
742 avctx->stats_out = x->old_twopassbuffer;
749 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
750 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
751 p->pict_type = AV_PICTURE_TYPE_P;
752 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
753 p->pict_type = AV_PICTURE_TYPE_B;
754 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
755 p->pict_type = AV_PICTURE_TYPE_S;
757 p->pict_type = AV_PICTURE_TYPE_I;
758 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
760 pkt->flags |= AV_PKT_FLAG_KEY;
761 if( x->quicktime_format )
762 return xvid_strip_vol_header(avctx, pkt,
763 xvid_enc_stats.hlength, xerr);
775 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
776 return AVERROR_EXTERNAL;
780 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
781 struct xvid_context *x = avctx->priv_data;
783 if(x->encoder_handle)
784 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
785 x->encoder_handle = NULL;
787 av_freep(&avctx->extradata);
788 if( x->twopassbuffer != NULL ) {
789 av_freep(&x->twopassbuffer);
790 av_freep(&x->old_twopassbuffer);
791 avctx->stats_out = NULL;
793 if (x->twopassfd>=0) {
794 unlink(x->twopassfile);
798 av_freep(&x->twopassfile);
799 av_freep(&x->intra_matrix);
800 av_freep(&x->inter_matrix);
805 #define OFFSET(x) offsetof(struct xvid_context, x)
806 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
807 static const AVOption options[] = {
808 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
809 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
810 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
811 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
812 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
813 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
814 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
815 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
819 static const AVClass xvid_class = {
820 .class_name = "libxvid",
821 .item_name = av_default_item_name,
823 .version = LIBAVUTIL_VERSION_INT,
826 AVCodec ff_libxvid_encoder = {
828 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
829 .type = AVMEDIA_TYPE_VIDEO,
830 .id = AV_CODEC_ID_MPEG4,
831 .priv_data_size = sizeof(struct xvid_context),
832 .init = xvid_encode_init,
833 .encode2 = xvid_encode_frame,
834 .close = xvid_encode_close,
835 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
836 .priv_class = &xvid_class,