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)
32 #include "libavutil/file.h"
33 #include "libavutil/cpu.h"
34 #include "libavutil/intreadwrite.h"
35 #include "libavutil/mathematics.h"
37 #include "mpegvideo.h"
40 * Buffer management macros.
42 #define BUFFER_SIZE 1024
43 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
44 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
47 * Structure for the private Xvid context.
48 * This stores all the private context for the codec.
51 void *encoder_handle; /**< Handle for Xvid encoder */
52 int xsize; /**< Frame x size */
53 int ysize; /**< Frame y size */
54 int vop_flags; /**< VOP flags for Xvid encoder */
55 int vol_flags; /**< VOL flags for Xvid encoder */
56 int me_flags; /**< Motion Estimation flags */
57 int qscale; /**< Do we use constant scale? */
58 int quicktime_format; /**< Are we in a QT-based format? */
59 AVFrame encoded_picture; /**< Encoded frame information */
60 char *twopassbuffer; /**< Character buffer for two-pass */
61 char *old_twopassbuffer; /**< Old character buffer (two-pass) */
62 char *twopassfile; /**< second pass temp file name */
63 unsigned char *intra_matrix; /**< P-Frame Quant Matrix */
64 unsigned char *inter_matrix; /**< I-Frame Quant Matrix */
68 * Structure for the private first-pass plugin.
70 struct xvid_ff_pass1 {
71 int version; /**< Xvid version */
72 struct xvid_context *context; /**< Pointer to private context */
76 * Xvid 2-Pass Kludge Section
78 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
79 * this section spends time replacing the first pass plugin so we can write
80 * statistic information as libavcodec requests in. We have another kludge
81 * that allows us to pass data to the second pass in Xvid without a custom
82 * rate-control plugin.
86 * Initialize the two-pass plugin and context.
88 * @param param Input construction parameter structure
89 * @param handle Private context handle
90 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
92 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
94 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
95 char *log = x->context->twopassbuffer;
97 /* Do a quick bounds check */
101 /* We use snprintf() */
102 /* This is because we can safely prevent a buffer overflow */
104 snprintf(log, BUFFER_REMAINING(log),
105 "# ffmpeg 2-pass log file, using xvid codec\n");
106 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
107 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
108 XVID_VERSION_MAJOR(XVID_VERSION),
109 XVID_VERSION_MINOR(XVID_VERSION),
110 XVID_VERSION_PATCH(XVID_VERSION));
112 *handle = x->context;
117 * Destroy the two-pass plugin context.
119 * @param ref Context pointer for the plugin
120 * @param param Destrooy context
121 * @return Returns 0, success guaranteed
123 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
124 xvid_plg_destroy_t *param) {
125 /* Currently cannot think of anything to do on destruction */
126 /* Still, the framework should be here for reference/use */
127 if( ref->twopassbuffer != NULL )
128 ref->twopassbuffer[0] = 0;
133 * Enable fast encode mode during the first pass.
135 * @param ref Context pointer for the plugin
136 * @param param Frame data
137 * @return Returns 0, success guaranteed
139 static int xvid_ff_2pass_before(struct xvid_context *ref,
140 xvid_plg_data_t *param) {
142 int motion_replacements;
145 /* Nothing to do here, result is changed too much */
146 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
149 /* We can implement a 'turbo' first pass mode here */
153 motion_remove = ~XVID_ME_CHROMA_PVOP &
154 ~XVID_ME_CHROMA_BVOP &
155 ~XVID_ME_EXTSEARCH16 &
156 ~XVID_ME_ADVANCEDDIAMOND16;
157 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
158 XVID_ME_SKIP_DELTASEARCH |
159 XVID_ME_FASTREFINE16 |
160 XVID_ME_BFRAME_EARLYSTOP;
161 vop_remove = ~XVID_VOP_MODEDECISION_RD &
162 ~XVID_VOP_FAST_MODEDECISION_RD &
163 ~XVID_VOP_TRELLISQUANT &
167 param->vol_flags &= ~XVID_VOL_GMC;
168 param->vop_flags &= vop_remove;
169 param->motion_flags &= motion_remove;
170 param->motion_flags |= motion_replacements;
176 * Capture statistic data and write it during first pass.
178 * @param ref Context pointer for the plugin
179 * @param param Statistic data
180 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
182 static int xvid_ff_2pass_after(struct xvid_context *ref,
183 xvid_plg_data_t *param) {
184 char *log = ref->twopassbuffer;
185 const char *frame_types = " ipbs";
188 /* Quick bounds check */
190 return XVID_ERR_FAIL;
192 /* Convert the type given to us into a character */
193 if( param->type < 5 && param->type > 0 ) {
194 frame_type = frame_types[param->type];
196 return XVID_ERR_FAIL;
199 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
200 "%c %d %d %d %d %d %d\n",
201 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
202 param->stats.ublks, param->stats.length, param->stats.hlength);
208 * Dispatch function for our custom plugin.
209 * This handles the dispatch for the Xvid plugin. It passes data
210 * on to other functions for actual processing.
212 * @param ref Context pointer for the plugin
213 * @param cmd The task given for us to complete
214 * @param p1 First parameter (varies)
215 * @param p2 Second parameter (varies)
216 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
218 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
225 case XVID_PLG_BEFORE:
226 return xvid_ff_2pass_before(ref, p1);
228 case XVID_PLG_CREATE:
229 return xvid_ff_2pass_create(p1, p2);
232 return xvid_ff_2pass_after(ref, p1);
234 case XVID_PLG_DESTROY:
235 return xvid_ff_2pass_destroy(ref, p1);
238 return XVID_ERR_FAIL;
243 * Routine to create a global VO/VOL header for MP4 container.
244 * What we do here is extract the header from the Xvid bitstream
245 * as it is encoded. We also strip the repeated headers from the
246 * bitstream when a global header is requested for MPEG-4 ISO
249 * @param avctx AVCodecContext pointer to context
250 * @param frame Pointer to encoded frame data
251 * @param header_len Length of header to search
252 * @param frame_len Length of encoded frame data
253 * @return Returns new length of frame data
255 static int xvid_strip_vol_header(AVCodecContext *avctx,
257 unsigned int header_len,
258 unsigned int frame_len) {
261 for( i = 0; i < header_len - 3; i++ ) {
262 if( pkt->data[i] == 0x00 &&
263 pkt->data[i+1] == 0x00 &&
264 pkt->data[i+2] == 0x01 &&
265 pkt->data[i+3] == 0xB6 ) {
272 /* We need to store the header, so extract it */
273 if( avctx->extradata == NULL ) {
274 avctx->extradata = av_malloc(vo_len);
275 memcpy(avctx->extradata, pkt->data, vo_len);
276 avctx->extradata_size = vo_len;
278 /* Less dangerous now, memmove properly copies the two
279 chunks of overlapping data */
280 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
281 pkt->size = frame_len - vo_len;
287 * Routine to correct a possibly erroneous framerate being fed to us.
288 * Xvid currently chokes on framerates where the ticks per frame is
289 * extremely large. This function works to correct problems in this area
290 * by estimating a new framerate and taking the simpler fraction of
293 * @param avctx Context that contains the framerate to correct.
295 static void xvid_correct_framerate(AVCodecContext *avctx)
298 int est_frate, est_fbase;
302 frate = avctx->time_base.den;
303 fbase = avctx->time_base.num;
305 gcd = av_gcd(frate, fbase);
311 if( frate <= 65000 && fbase <= 65000 ) {
312 avctx->time_base.den = frate;
313 avctx->time_base.num = fbase;
317 fps = (float)frate / (float)fbase;
318 est_fps = roundf(fps * 1000.0) / 1000.0;
320 est_frate = (int)est_fps;
321 if( est_fps > (int)est_fps ) {
322 est_frate = (est_frate + 1) * 1000;
323 est_fbase = (int)roundf((float)est_frate / est_fps);
327 gcd = av_gcd(est_frate, est_fbase);
333 if( fbase > est_fbase ) {
334 avctx->time_base.den = est_frate;
335 avctx->time_base.num = est_fbase;
336 av_log(avctx, AV_LOG_DEBUG,
337 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
338 est_fps, (((est_fps - fps)/fps) * 100.0));
340 avctx->time_base.den = frate;
341 avctx->time_base.num = fbase;
346 * Create the private context for the encoder.
347 * All buffers are allocated, settings are loaded from the user,
348 * and the encoder context created.
350 * @param avctx AVCodecContext pointer to context
351 * @return Returns 0 on success, -1 on failure
353 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
355 int xvid_flags = avctx->flags;
356 struct xvid_context *x = avctx->priv_data;
357 uint16_t *intra, *inter;
360 xvid_plugin_single_t single = { 0 };
361 struct xvid_ff_pass1 rc2pass1 = { 0 };
362 xvid_plugin_2pass2_t rc2pass2 = { 0 };
363 xvid_gbl_init_t xvid_gbl_init = { 0 };
364 xvid_enc_create_t xvid_enc_create = { 0 };
365 xvid_enc_plugin_t plugins[7];
367 /* Bring in VOP flags from ffmpeg command-line */
368 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
369 if( xvid_flags & CODEC_FLAG_4MV )
370 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
373 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
374 if( xvid_flags & CODEC_FLAG_AC_PRED )
375 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
376 if( xvid_flags & CODEC_FLAG_GRAY )
377 x->vop_flags |= XVID_VOP_GREYSCALE;
379 /* Decide which ME quality setting to use */
381 switch( avctx->me_method ) {
382 case ME_FULL: /* Quality 6 */
383 x->me_flags |= XVID_ME_EXTSEARCH16
384 | XVID_ME_EXTSEARCH8;
386 case ME_EPZS: /* Quality 4 */
387 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
388 | XVID_ME_HALFPELREFINE8
389 | XVID_ME_CHROMA_PVOP
390 | XVID_ME_CHROMA_BVOP;
392 case ME_LOG: /* Quality 2 */
395 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
396 | XVID_ME_HALFPELREFINE16;
398 case ME_ZERO: /* Quality 0 */
403 /* Decide how we should decide blocks */
404 switch( avctx->mb_decision ) {
406 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
407 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
408 | XVID_ME_QUARTERPELREFINE8_RD
409 | XVID_ME_EXTSEARCH_RD
410 | XVID_ME_CHECKPREDICTION_RD;
412 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
413 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
414 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
415 | XVID_ME_QUARTERPELREFINE16_RD;
421 /* Bring in VOL flags from ffmpeg command-line */
423 if( xvid_flags & CODEC_FLAG_GMC ) {
424 x->vol_flags |= XVID_VOL_GMC;
425 x->me_flags |= XVID_ME_GME_REFINE;
427 if( xvid_flags & CODEC_FLAG_QPEL ) {
428 x->vol_flags |= XVID_VOL_QUARTERPEL;
429 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
430 if( x->vop_flags & XVID_VOP_INTER4V )
431 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
434 xvid_gbl_init.version = XVID_VERSION;
435 xvid_gbl_init.debug = 0;
438 /* Xvid's PPC support is borked, use libavcodec to detect */
440 if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
441 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
444 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
446 /* Xvid can detect on x86 */
447 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");
503 if( avctx->stats_in == NULL ) {
504 av_log(avctx, AV_LOG_ERROR,
505 "Xvid: No 2-pass information loaded for second pass\n");
509 if( strlen(avctx->stats_in) >
510 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");
518 rc2pass2.filename = x->twopassfile;
519 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
520 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
521 xvid_enc_create.num_plugins++;
522 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
523 /* Single Pass Bitrate Control! */
524 single.version = XVID_VERSION;
525 single.bitrate = avctx->bit_rate;
527 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
528 plugins[xvid_enc_create.num_plugins].param = &single;
529 xvid_enc_create.num_plugins++;
532 /* Luminance Masking */
533 if( 0.0 != avctx->lumi_masking ) {
534 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
535 plugins[xvid_enc_create.num_plugins].param = NULL;
536 xvid_enc_create.num_plugins++;
539 /* Frame Rate and Key Frames */
540 xvid_correct_framerate(avctx);
541 xvid_enc_create.fincr = avctx->time_base.num;
542 xvid_enc_create.fbase = avctx->time_base.den;
543 if( avctx->gop_size > 0 )
544 xvid_enc_create.max_key_interval = avctx->gop_size;
546 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
549 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
552 xvid_enc_create.min_quant[0] = avctx->qmin;
553 xvid_enc_create.min_quant[1] = avctx->qmin;
554 xvid_enc_create.min_quant[2] = avctx->qmin;
555 xvid_enc_create.max_quant[0] = avctx->qmax;
556 xvid_enc_create.max_quant[1] = avctx->qmax;
557 xvid_enc_create.max_quant[2] = avctx->qmax;
560 x->intra_matrix = x->inter_matrix = NULL;
561 if( avctx->mpeg_quant )
562 x->vol_flags |= XVID_VOL_MPEGQUANT;
563 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
564 x->vol_flags |= XVID_VOL_MPEGQUANT;
566 if( avctx->intra_matrix ) {
567 intra = avctx->intra_matrix;
568 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
571 if( avctx->inter_matrix ) {
572 inter = avctx->inter_matrix;
573 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
577 for( i = 0; i < 64; i++ ) {
579 x->intra_matrix[i] = (unsigned char)intra[i];
581 x->inter_matrix[i] = (unsigned char)inter[i];
586 xvid_enc_create.frame_drop_ratio = 0;
587 xvid_enc_create.global = 0;
588 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
589 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
591 /* Determines which codec mode we are operating in */
592 avctx->extradata = NULL;
593 avctx->extradata_size = 0;
594 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
595 /* In this case, we are claiming to be MPEG4 */
596 x->quicktime_format = 1;
597 avctx->codec_id = CODEC_ID_MPEG4;
599 /* We are claiming to be Xvid */
600 x->quicktime_format = 0;
601 if(!avctx->codec_tag)
602 avctx->codec_tag = AV_RL32("xvid");
606 xvid_enc_create.max_bframes = avctx->max_b_frames;
607 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
608 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
609 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
611 /* Create encoder context */
612 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
614 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
618 x->encoder_handle = xvid_enc_create.handle;
619 avctx->coded_frame = &x->encoded_picture;
625 * Encode a single frame.
627 * @param avctx AVCodecContext pointer to context
628 * @param frame Pointer to encoded frame buffer
629 * @param buf_size Size of encoded frame buffer
630 * @param data Pointer to AVFrame of unencoded frame
631 * @return Returns 0 on success, -1 on failure
633 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
634 const AVFrame *picture, int *got_packet)
636 int xerr, i, ret, user_packet = !!pkt->data;
638 struct xvid_context *x = avctx->priv_data;
639 AVFrame *p = &x->encoded_picture;
640 int mb_width = (avctx->width + 15) / 16;
641 int mb_height = (avctx->height + 15) / 16;
643 xvid_enc_frame_t xvid_enc_frame = { 0 };
644 xvid_enc_stats_t xvid_enc_stats = { 0 };
646 if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0)
649 /* Start setting up the frame */
650 xvid_enc_frame.version = XVID_VERSION;
651 xvid_enc_stats.version = XVID_VERSION;
654 /* Let Xvid know where to put the frame. */
655 xvid_enc_frame.bitstream = pkt->data;
656 xvid_enc_frame.length = pkt->size;
658 /* Initialize input image fields */
659 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
660 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
664 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
666 for( i = 0; i < 4; i++ ) {
667 xvid_enc_frame.input.plane[i] = picture->data[i];
668 xvid_enc_frame.input.stride[i] = picture->linesize[i];
672 xvid_enc_frame.vop_flags = x->vop_flags;
673 xvid_enc_frame.vol_flags = x->vol_flags;
674 xvid_enc_frame.motion = x->me_flags;
675 xvid_enc_frame.type =
676 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
677 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
678 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
681 /* Pixel aspect ratio setting */
682 if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.num > 255 ||
683 avctx->sample_aspect_ratio.den < 0 || avctx->sample_aspect_ratio.den > 255) {
684 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
685 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
688 xvid_enc_frame.par = XVID_PAR_EXT;
689 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
690 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
693 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
694 else xvid_enc_frame.quant = 0;
697 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
698 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
701 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
702 &xvid_enc_frame, &xvid_enc_stats);
704 /* Two-pass log buffer swapping */
705 avctx->stats_out = NULL;
706 if( x->twopassbuffer ) {
707 tmp = x->old_twopassbuffer;
708 x->old_twopassbuffer = x->twopassbuffer;
709 x->twopassbuffer = tmp;
710 x->twopassbuffer[0] = 0;
711 if( x->old_twopassbuffer[0] != 0 ) {
712 avctx->stats_out = x->old_twopassbuffer;
719 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
720 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
721 p->pict_type = AV_PICTURE_TYPE_P;
722 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
723 p->pict_type = AV_PICTURE_TYPE_B;
724 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
725 p->pict_type = AV_PICTURE_TYPE_S;
727 p->pict_type = AV_PICTURE_TYPE_I;
728 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
730 pkt->flags |= AV_PKT_FLAG_KEY;
731 if( x->quicktime_format )
732 return xvid_strip_vol_header(avctx, pkt,
733 xvid_enc_stats.hlength, xerr);
745 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
751 * Destroy the private context for the encoder.
752 * All buffers are freed, and the Xvid encoder context is destroyed.
754 * @param avctx AVCodecContext pointer to context
755 * @return Returns 0, success guaranteed
757 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
758 struct xvid_context *x = avctx->priv_data;
760 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
762 av_freep(&avctx->extradata);
763 if( x->twopassbuffer != NULL ) {
764 av_free(x->twopassbuffer);
765 av_free(x->old_twopassbuffer);
766 avctx->stats_out = NULL;
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 = 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"),