2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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/cpu.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
35 #include "mpegvideo.h"
38 * Buffer management macros.
40 #define BUFFER_SIZE 1024
41 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
42 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
45 * Structure for the private Xvid context.
46 * This stores all the private context for the codec.
49 void *encoder_handle; /**< Handle for Xvid encoder */
50 int xsize; /**< Frame x size */
51 int ysize; /**< Frame y size */
52 int vop_flags; /**< VOP flags for Xvid encoder */
53 int vol_flags; /**< VOL flags for Xvid encoder */
54 int me_flags; /**< Motion Estimation flags */
55 int qscale; /**< Do we use constant scale? */
56 int quicktime_format; /**< Are we in a QT-based format? */
57 AVFrame encoded_picture; /**< Encoded frame information */
58 char *twopassbuffer; /**< Character buffer for two-pass */
59 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
60 char *twopassfile; /**< second pass temp file name */
61 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
62 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
66 * Structure for the private first-pass plugin.
68 struct xvid_ff_pass1 {
69 int version; /**< Xvid version */
70 struct xvid_context *context; /**< Pointer to private context */
74 * Xvid 2-Pass Kludge Section
76 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
77 * this section spends time replacing the first pass plugin so we can write
78 * statistic information as libavcodec requests in. We have another kludge
79 * that allows us to pass data to the second pass in Xvid without a custom
80 * rate-control plugin.
84 * Initialize the two-pass plugin and context.
86 * @param param Input construction parameter structure
87 * @param handle Private context handle
88 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
90 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
92 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
93 char *log = x->context->twopassbuffer;
95 /* Do a quick bounds check */
99 /* We use snprintf() */
100 /* This is because we can safely prevent a buffer overflow */
102 snprintf(log, BUFFER_REMAINING(log),
103 "# avconv 2-pass log file, using xvid codec\n");
104 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
105 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
106 XVID_VERSION_MAJOR(XVID_VERSION),
107 XVID_VERSION_MINOR(XVID_VERSION),
108 XVID_VERSION_PATCH(XVID_VERSION));
110 *handle = x->context;
115 * Destroy the two-pass plugin context.
117 * @param ref Context pointer for the plugin
118 * @param param Destrooy context
119 * @return Returns 0, success guaranteed
121 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
122 xvid_plg_destroy_t *param) {
123 /* Currently cannot think of anything to do on destruction */
124 /* Still, the framework should be here for reference/use */
125 if( ref->twopassbuffer != NULL )
126 ref->twopassbuffer[0] = 0;
131 * Enable fast encode mode during the first pass.
133 * @param ref Context pointer for the plugin
134 * @param param Frame data
135 * @return Returns 0, success guaranteed
137 static int xvid_ff_2pass_before(struct xvid_context *ref,
138 xvid_plg_data_t *param) {
140 int motion_replacements;
143 /* Nothing to do here, result is changed too much */
144 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
147 /* We can implement a 'turbo' first pass mode here */
151 motion_remove = ~XVID_ME_CHROMA_PVOP &
152 ~XVID_ME_CHROMA_BVOP &
153 ~XVID_ME_EXTSEARCH16 &
154 ~XVID_ME_ADVANCEDDIAMOND16;
155 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
156 XVID_ME_SKIP_DELTASEARCH |
157 XVID_ME_FASTREFINE16 |
158 XVID_ME_BFRAME_EARLYSTOP;
159 vop_remove = ~XVID_VOP_MODEDECISION_RD &
160 ~XVID_VOP_FAST_MODEDECISION_RD &
161 ~XVID_VOP_TRELLISQUANT &
165 param->vol_flags &= ~XVID_VOL_GMC;
166 param->vop_flags &= vop_remove;
167 param->motion_flags &= motion_remove;
168 param->motion_flags |= motion_replacements;
174 * Capture statistic data and write it during first pass.
176 * @param ref Context pointer for the plugin
177 * @param param Statistic data
178 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
180 static int xvid_ff_2pass_after(struct xvid_context *ref,
181 xvid_plg_data_t *param) {
182 char *log = ref->twopassbuffer;
183 const char *frame_types = " ipbs";
186 /* Quick bounds check */
188 return XVID_ERR_FAIL;
190 /* Convert the type given to us into a character */
191 if( param->type < 5 && param->type > 0 ) {
192 frame_type = frame_types[param->type];
194 return XVID_ERR_FAIL;
197 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
198 "%c %d %d %d %d %d %d\n",
199 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
200 param->stats.ublks, param->stats.length, param->stats.hlength);
206 * Dispatch function for our custom plugin.
207 * This handles the dispatch for the Xvid plugin. It passes data
208 * on to other functions for actual processing.
210 * @param ref Context pointer for the plugin
211 * @param cmd The task given for us to complete
212 * @param p1 First parameter (varies)
213 * @param p2 Second parameter (varies)
214 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
216 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
223 case XVID_PLG_BEFORE:
224 return xvid_ff_2pass_before(ref, p1);
226 case XVID_PLG_CREATE:
227 return xvid_ff_2pass_create(p1, p2);
230 return xvid_ff_2pass_after(ref, p1);
232 case XVID_PLG_DESTROY:
233 return xvid_ff_2pass_destroy(ref, p1);
236 return XVID_ERR_FAIL;
241 * Routine to create a global VO/VOL header for MP4 container.
242 * What we do here is extract the header from the Xvid bitstream
243 * as it is encoded. We also strip the repeated headers from the
244 * bitstream when a global header is requested for MPEG-4 ISO
247 * @param avctx AVCodecContext pointer to context
248 * @param frame Pointer to encoded frame data
249 * @param header_len Length of header to search
250 * @param frame_len Length of encoded frame data
251 * @return Returns new length of frame data
253 static int xvid_strip_vol_header(AVCodecContext *avctx,
255 unsigned int header_len,
256 unsigned int frame_len) {
259 for( i = 0; i < header_len - 3; i++ ) {
260 if( pkt->data[i] == 0x00 &&
261 pkt->data[i+1] == 0x00 &&
262 pkt->data[i+2] == 0x01 &&
263 pkt->data[i+3] == 0xB6 ) {
270 /* We need to store the header, so extract it */
271 if( avctx->extradata == NULL ) {
272 avctx->extradata = av_malloc(vo_len);
273 memcpy(avctx->extradata, pkt->data, vo_len);
274 avctx->extradata_size = vo_len;
276 /* Less dangerous now, memmove properly copies the two
277 chunks of overlapping data */
278 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
279 pkt->size = frame_len - vo_len;
285 * Routine to correct a possibly erroneous framerate being fed to us.
286 * Xvid currently chokes on framerates where the ticks per frame is
287 * extremely large. This function works to correct problems in this area
288 * by estimating a new framerate and taking the simpler fraction of
291 * @param avctx Context that contains the framerate to correct.
293 static void xvid_correct_framerate(AVCodecContext *avctx)
296 int est_frate, est_fbase;
300 frate = avctx->time_base.den;
301 fbase = avctx->time_base.num;
303 gcd = av_gcd(frate, fbase);
309 if( frate <= 65000 && fbase <= 65000 ) {
310 avctx->time_base.den = frate;
311 avctx->time_base.num = fbase;
315 fps = (float)frate / (float)fbase;
316 est_fps = roundf(fps * 1000.0) / 1000.0;
318 est_frate = (int)est_fps;
319 if( est_fps > (int)est_fps ) {
320 est_frate = (est_frate + 1) * 1000;
321 est_fbase = (int)roundf((float)est_frate / est_fps);
325 gcd = av_gcd(est_frate, est_fbase);
331 if( fbase > est_fbase ) {
332 avctx->time_base.den = est_frate;
333 avctx->time_base.num = est_fbase;
334 av_log(avctx, AV_LOG_DEBUG,
335 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
336 est_fps, (((est_fps - fps)/fps) * 100.0));
338 avctx->time_base.den = frate;
339 avctx->time_base.num = fbase;
344 * Create the private context for the encoder.
345 * All buffers are allocated, settings are loaded from the user,
346 * and the encoder context created.
348 * @param avctx AVCodecContext pointer to context
349 * @return Returns 0 on success, -1 on failure
351 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
353 int xvid_flags = avctx->flags;
354 struct xvid_context *x = avctx->priv_data;
355 uint16_t *intra, *inter;
358 xvid_plugin_single_t single = { 0 };
359 struct xvid_ff_pass1 rc2pass1 = { 0 };
360 xvid_plugin_2pass2_t rc2pass2 = { 0 };
361 xvid_gbl_init_t xvid_gbl_init = { 0 };
362 xvid_enc_create_t xvid_enc_create = { 0 };
363 xvid_enc_plugin_t plugins[7];
365 /* Bring in VOP flags from avconv command-line */
366 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
367 if( xvid_flags & CODEC_FLAG_4MV )
368 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
371 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
372 if( xvid_flags & CODEC_FLAG_AC_PRED )
373 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
374 if( xvid_flags & CODEC_FLAG_GRAY )
375 x->vop_flags |= XVID_VOP_GREYSCALE;
377 /* Decide which ME quality setting to use */
379 switch( avctx->me_method ) {
380 case ME_FULL: /* Quality 6 */
381 x->me_flags |= XVID_ME_EXTSEARCH16
382 | XVID_ME_EXTSEARCH8;
384 case ME_EPZS: /* Quality 4 */
385 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
386 | XVID_ME_HALFPELREFINE8
387 | XVID_ME_CHROMA_PVOP
388 | XVID_ME_CHROMA_BVOP;
390 case ME_LOG: /* Quality 2 */
393 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
394 | XVID_ME_HALFPELREFINE16;
396 case ME_ZERO: /* Quality 0 */
401 /* Decide how we should decide blocks */
402 switch( avctx->mb_decision ) {
404 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
405 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
406 | XVID_ME_QUARTERPELREFINE8_RD
407 | XVID_ME_EXTSEARCH_RD
408 | XVID_ME_CHECKPREDICTION_RD;
410 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
411 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
412 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
413 | XVID_ME_QUARTERPELREFINE16_RD;
419 /* Bring in VOL flags from avconv command-line */
421 if( xvid_flags & CODEC_FLAG_GMC ) {
422 x->vol_flags |= XVID_VOL_GMC;
423 x->me_flags |= XVID_ME_GME_REFINE;
425 if( xvid_flags & CODEC_FLAG_QPEL ) {
426 x->vol_flags |= XVID_VOL_QUARTERPEL;
427 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
428 if( x->vop_flags & XVID_VOP_INTER4V )
429 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
432 xvid_gbl_init.version = XVID_VERSION;
433 xvid_gbl_init.debug = 0;
436 /* Xvid's PPC support is borked, use libavcodec to detect */
438 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
439 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
442 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
444 /* Xvid can detect on x86 */
445 xvid_gbl_init.cpu_flags = 0;
449 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
451 /* Create the encoder reference */
452 xvid_enc_create.version = XVID_VERSION;
454 /* Store the desired frame size */
455 xvid_enc_create.width = x->xsize = avctx->width;
456 xvid_enc_create.height = x->ysize = avctx->height;
458 /* Xvid can determine the proper profile to use */
459 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
461 /* We don't use zones */
462 xvid_enc_create.zones = NULL;
463 xvid_enc_create.num_zones = 0;
465 xvid_enc_create.num_threads = avctx->thread_count;
467 xvid_enc_create.plugins = plugins;
468 xvid_enc_create.num_plugins = 0;
470 /* Initialize Buffers */
471 x->twopassbuffer = NULL;
472 x->old_twopassbuffer = NULL;
473 x->twopassfile = NULL;
475 if( xvid_flags & CODEC_FLAG_PASS1 ) {
476 rc2pass1.version = XVID_VERSION;
477 rc2pass1.context = x;
478 x->twopassbuffer = av_malloc(BUFFER_SIZE);
479 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
480 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
481 av_log(avctx, AV_LOG_ERROR,
482 "Xvid: Cannot allocate 2-pass log buffers\n");
485 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
487 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
488 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
489 xvid_enc_create.num_plugins++;
490 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
491 rc2pass2.version = XVID_VERSION;
492 rc2pass2.bitrate = avctx->bit_rate;
494 fd = ff_tempfile("xvidff.", &x->twopassfile);
496 av_log(avctx, AV_LOG_ERROR,
497 "Xvid: Cannot write 2-pass pipe\n");
501 if( avctx->stats_in == NULL ) {
502 av_log(avctx, AV_LOG_ERROR,
503 "Xvid: No 2-pass information loaded for second pass\n");
507 if( strlen(avctx->stats_in) >
508 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
510 av_log(avctx, AV_LOG_ERROR,
511 "Xvid: Cannot write to 2-pass pipe\n");
516 rc2pass2.filename = x->twopassfile;
517 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
518 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
519 xvid_enc_create.num_plugins++;
520 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
521 /* Single Pass Bitrate Control! */
522 single.version = XVID_VERSION;
523 single.bitrate = avctx->bit_rate;
525 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
526 plugins[xvid_enc_create.num_plugins].param = &single;
527 xvid_enc_create.num_plugins++;
530 /* Luminance Masking */
531 if( 0.0 != avctx->lumi_masking ) {
532 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
533 plugins[xvid_enc_create.num_plugins].param = NULL;
534 xvid_enc_create.num_plugins++;
537 /* Frame Rate and Key Frames */
538 xvid_correct_framerate(avctx);
539 xvid_enc_create.fincr = avctx->time_base.num;
540 xvid_enc_create.fbase = avctx->time_base.den;
541 if( avctx->gop_size > 0 )
542 xvid_enc_create.max_key_interval = avctx->gop_size;
544 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
547 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
550 xvid_enc_create.min_quant[0] = avctx->qmin;
551 xvid_enc_create.min_quant[1] = avctx->qmin;
552 xvid_enc_create.min_quant[2] = avctx->qmin;
553 xvid_enc_create.max_quant[0] = avctx->qmax;
554 xvid_enc_create.max_quant[1] = avctx->qmax;
555 xvid_enc_create.max_quant[2] = avctx->qmax;
558 x->intra_matrix = x->inter_matrix = NULL;
559 if( avctx->mpeg_quant )
560 x->vol_flags |= XVID_VOL_MPEGQUANT;
561 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
562 x->vol_flags |= XVID_VOL_MPEGQUANT;
564 if( avctx->intra_matrix ) {
565 intra = avctx->intra_matrix;
566 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
569 if( avctx->inter_matrix ) {
570 inter = avctx->inter_matrix;
571 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
575 for( i = 0; i < 64; i++ ) {
577 x->intra_matrix[i] = (unsigned char)intra[i];
579 x->inter_matrix[i] = (unsigned char)inter[i];
584 xvid_enc_create.frame_drop_ratio = 0;
585 xvid_enc_create.global = 0;
586 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
587 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
589 /* Determines which codec mode we are operating in */
590 avctx->extradata = NULL;
591 avctx->extradata_size = 0;
592 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
593 /* In this case, we are claiming to be MPEG4 */
594 x->quicktime_format = 1;
595 avctx->codec_id = AV_CODEC_ID_MPEG4;
597 /* We are claiming to be Xvid */
598 x->quicktime_format = 0;
599 if(!avctx->codec_tag)
600 avctx->codec_tag = AV_RL32("xvid");
604 xvid_enc_create.max_bframes = avctx->max_b_frames;
605 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
606 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
607 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
609 /* Create encoder context */
610 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
612 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
616 x->encoder_handle = xvid_enc_create.handle;
617 avctx->coded_frame = &x->encoded_picture;
623 * Encode a single frame.
625 * @param avctx AVCodecContext pointer to context
626 * @param frame Pointer to encoded frame buffer
627 * @param buf_size Size of encoded frame buffer
628 * @param data Pointer to AVFrame of unencoded frame
629 * @return Returns 0 on success, -1 on failure
631 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
632 const AVFrame *picture, int *got_packet)
634 int xerr, i, ret, user_packet = !!pkt->data;
636 struct xvid_context *x = avctx->priv_data;
637 AVFrame *p = &x->encoded_picture;
638 int mb_width = (avctx->width + 15) / 16;
639 int mb_height = (avctx->height + 15) / 16;
641 xvid_enc_frame_t xvid_enc_frame = { 0 };
642 xvid_enc_stats_t xvid_enc_stats = { 0 };
645 (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
646 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
650 /* Start setting up the frame */
651 xvid_enc_frame.version = XVID_VERSION;
652 xvid_enc_stats.version = XVID_VERSION;
655 /* Let Xvid know where to put the frame. */
656 xvid_enc_frame.bitstream = pkt->data;
657 xvid_enc_frame.length = pkt->size;
659 /* Initialize input image fields */
660 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
661 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
665 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
667 for( i = 0; i < 4; i++ ) {
668 xvid_enc_frame.input.plane[i] = picture->data[i];
669 xvid_enc_frame.input.stride[i] = picture->linesize[i];
673 xvid_enc_frame.vop_flags = x->vop_flags;
674 xvid_enc_frame.vol_flags = x->vol_flags;
675 xvid_enc_frame.motion = x->me_flags;
676 xvid_enc_frame.type =
677 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
678 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
679 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
682 /* Pixel aspect ratio setting */
683 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
684 avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
685 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
686 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
689 xvid_enc_frame.par = XVID_PAR_EXT;
690 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
691 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
694 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
695 else xvid_enc_frame.quant = 0;
698 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
699 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
702 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
703 &xvid_enc_frame, &xvid_enc_stats);
705 /* Two-pass log buffer swapping */
706 avctx->stats_out = NULL;
707 if( x->twopassbuffer ) {
708 tmp = x->old_twopassbuffer;
709 x->old_twopassbuffer = x->twopassbuffer;
710 x->twopassbuffer = tmp;
711 x->twopassbuffer[0] = 0;
712 if( x->old_twopassbuffer[0] != 0 ) {
713 avctx->stats_out = x->old_twopassbuffer;
720 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
721 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
722 p->pict_type = AV_PICTURE_TYPE_P;
723 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
724 p->pict_type = AV_PICTURE_TYPE_B;
725 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
726 p->pict_type = AV_PICTURE_TYPE_S;
728 p->pict_type = AV_PICTURE_TYPE_I;
729 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
731 pkt->flags |= AV_PKT_FLAG_KEY;
732 if( x->quicktime_format )
733 return xvid_strip_vol_header(avctx, pkt,
734 xvid_enc_stats.hlength, xerr);
746 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
752 * Destroy the private context for the encoder.
753 * All buffers are freed, and the Xvid encoder context is destroyed.
755 * @param avctx AVCodecContext pointer to context
756 * @return Returns 0, success guaranteed
758 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
759 struct xvid_context *x = avctx->priv_data;
761 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
763 av_freep(&avctx->extradata);
764 if( x->twopassbuffer != NULL ) {
765 av_free(x->twopassbuffer);
766 av_free(x->old_twopassbuffer);
768 av_free(x->twopassfile);
769 av_free(x->intra_matrix);
770 av_free(x->inter_matrix);
776 * Xvid codec definition for libavcodec.
778 AVCodec ff_libxvid_encoder = {
780 .type = AVMEDIA_TYPE_VIDEO,
781 .id = AV_CODEC_ID_MPEG4,
782 .priv_data_size = sizeof(struct xvid_context),
783 .init = xvid_encode_init,
784 .encode2 = xvid_encode_frame,
785 .close = xvid_encode_close,
786 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV420P, PIX_FMT_NONE },
787 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),