ad650dd840b87d038743ade9a0f307f6b584e11b
[libav.git] / libavcodec / libxvid.c
1 /*
2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
4 *
5 * This file is part of Libav.
6 *
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.
11 *
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.
16 *
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
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 <xvid.h>
29 #include <unistd.h>
30 #include "avcodec.h"
31 #include "libavutil/cpu.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34 #include "libxvid.h"
35 #include "mpegvideo.h"
36
37 /**
38 * Buffer management macros.
39 */
40 #define BUFFER_SIZE 1024
41 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
42 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
43
44 /**
45 * Structure for the private Xvid context.
46 * This stores all the private context for the codec.
47 */
48 struct xvid_context {
49 AVClass *class; /**< Handle for Xvid encoder */
50 void *encoder_handle; /**< Handle for Xvid encoder */
51 int xsize; /**< Frame x size */
52 int ysize; /**< Frame y size */
53 int vop_flags; /**< VOP flags for Xvid encoder */
54 int vol_flags; /**< VOL flags for Xvid encoder */
55 int me_flags; /**< Motion Estimation flags */
56 int qscale; /**< Do we use constant scale? */
57 int quicktime_format; /**< Are we in a QT-based format? */
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 */
63 int lumi_aq; /**< Lumi masking as an aq method */
64 int variance_aq; /**< Variance adaptive quantization */
65 int ssim; /**< SSIM information display mode */
66 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
67 int gmc;
68 };
69
70 /**
71 * Structure for the private first-pass plugin.
72 */
73 struct xvid_ff_pass1 {
74 int version; /**< Xvid version */
75 struct xvid_context *context; /**< Pointer to private context */
76 };
77
78 /*
79 * Xvid 2-Pass Kludge Section
80 *
81 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
82 * this section spends time replacing the first pass plugin so we can write
83 * statistic information as libavcodec requests in. We have another kludge
84 * that allows us to pass data to the second pass in Xvid without a custom
85 * rate-control plugin.
86 */
87
88 /**
89 * Initialize the two-pass plugin and context.
90 *
91 * @param param Input construction parameter structure
92 * @param handle Private context handle
93 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
94 */
95 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
96 void ** handle) {
97 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *)param->param;
98 char *log = x->context->twopassbuffer;
99
100 /* Do a quick bounds check */
101 if (!log)
102 return XVID_ERR_FAIL;
103
104 /* We use snprintf() */
105 /* This is because we can safely prevent a buffer overflow */
106 log[0] = 0;
107 snprintf(log, BUFFER_REMAINING(log),
108 "# avconv 2-pass log file, using xvid codec\n");
109 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
110 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
111 XVID_VERSION_MAJOR(XVID_VERSION),
112 XVID_VERSION_MINOR(XVID_VERSION),
113 XVID_VERSION_PATCH(XVID_VERSION));
114
115 *handle = x->context;
116 return 0;
117 }
118
119 /**
120 * Destroy the two-pass plugin context.
121 *
122 * @param ref Context pointer for the plugin
123 * @param param Destrooy context
124 * @return Returns 0, success guaranteed
125 */
126 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
127 xvid_plg_destroy_t *param) {
128 /* Currently cannot think of anything to do on destruction */
129 /* Still, the framework should be here for reference/use */
130 if (ref->twopassbuffer)
131 ref->twopassbuffer[0] = 0;
132 return 0;
133 }
134
135 /**
136 * Enable fast encode mode during the first pass.
137 *
138 * @param ref Context pointer for the plugin
139 * @param param Frame data
140 * @return Returns 0, success guaranteed
141 */
142 static int xvid_ff_2pass_before(struct xvid_context *ref,
143 xvid_plg_data_t *param) {
144 int motion_remove;
145 int motion_replacements;
146 int vop_remove;
147
148 /* Nothing to do here, result is changed too much */
149 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
150 return 0;
151
152 /* We can implement a 'turbo' first pass mode here */
153 param->quant = 2;
154
155 /* Init values */
156 motion_remove = ~XVID_ME_CHROMA_PVOP &
157 ~XVID_ME_CHROMA_BVOP &
158 ~XVID_ME_EXTSEARCH16 &
159 ~XVID_ME_ADVANCEDDIAMOND16;
160 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
161 XVID_ME_SKIP_DELTASEARCH |
162 XVID_ME_FASTREFINE16 |
163 XVID_ME_BFRAME_EARLYSTOP;
164 vop_remove = ~XVID_VOP_MODEDECISION_RD &
165 ~XVID_VOP_FAST_MODEDECISION_RD &
166 ~XVID_VOP_TRELLISQUANT &
167 ~XVID_VOP_INTER4V &
168 ~XVID_VOP_HQACPRED;
169
170 param->vol_flags &= ~XVID_VOL_GMC;
171 param->vop_flags &= vop_remove;
172 param->motion_flags &= motion_remove;
173 param->motion_flags |= motion_replacements;
174
175 return 0;
176 }
177
178 /**
179 * Capture statistic data and write it during first pass.
180 *
181 * @param ref Context pointer for the plugin
182 * @param param Statistic data
183 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
184 */
185 static int xvid_ff_2pass_after(struct xvid_context *ref,
186 xvid_plg_data_t *param) {
187 char *log = ref->twopassbuffer;
188 const char *frame_types = " ipbs";
189 char frame_type;
190
191 /* Quick bounds check */
192 if (!log)
193 return XVID_ERR_FAIL;
194
195 /* Convert the type given to us into a character */
196 if( param->type < 5 && param->type > 0 ) {
197 frame_type = frame_types[param->type];
198 } else {
199 return XVID_ERR_FAIL;
200 }
201
202 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
203 "%c %d %d %d %d %d %d\n",
204 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
205 param->stats.ublks, param->stats.length, param->stats.hlength);
206
207 return 0;
208 }
209
210 /**
211 * Dispatch function for our custom plugin.
212 * This handles the dispatch for the Xvid plugin. It passes data
213 * on to other functions for actual processing.
214 *
215 * @param ref Context pointer for the plugin
216 * @param cmd The task given for us to complete
217 * @param p1 First parameter (varies)
218 * @param p2 Second parameter (varies)
219 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
220 */
221 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
222 {
223 switch( cmd ) {
224 case XVID_PLG_INFO:
225 case XVID_PLG_FRAME:
226 return 0;
227
228 case XVID_PLG_BEFORE:
229 return xvid_ff_2pass_before(ref, p1);
230
231 case XVID_PLG_CREATE:
232 return xvid_ff_2pass_create(p1, p2);
233
234 case XVID_PLG_AFTER:
235 return xvid_ff_2pass_after(ref, p1);
236
237 case XVID_PLG_DESTROY:
238 return xvid_ff_2pass_destroy(ref, p1);
239
240 default:
241 return XVID_ERR_FAIL;
242 }
243 }
244
245 /**
246 * Routine to create a global VO/VOL header for MP4 container.
247 * What we do here is extract the header from the Xvid bitstream
248 * as it is encoded. We also strip the repeated headers from the
249 * bitstream when a global header is requested for MPEG-4 ISO
250 * compliance.
251 *
252 * @param avctx AVCodecContext pointer to context
253 * @param frame Pointer to encoded frame data
254 * @param header_len Length of header to search
255 * @param frame_len Length of encoded frame data
256 * @return Returns new length of frame data
257 */
258 static int xvid_strip_vol_header(AVCodecContext *avctx,
259 AVPacket *pkt,
260 unsigned int header_len,
261 unsigned int frame_len) {
262 int vo_len = 0, i;
263
264 for( i = 0; i < header_len - 3; i++ ) {
265 if( pkt->data[i] == 0x00 &&
266 pkt->data[i+1] == 0x00 &&
267 pkt->data[i+2] == 0x01 &&
268 pkt->data[i+3] == 0xB6 ) {
269 vo_len = i;
270 break;
271 }
272 }
273
274 if( vo_len > 0 ) {
275 /* We need to store the header, so extract it */
276 if (!avctx->extradata) {
277 avctx->extradata = av_malloc(vo_len);
278 memcpy(avctx->extradata, pkt->data, vo_len);
279 avctx->extradata_size = vo_len;
280 }
281 /* Less dangerous now, memmove properly copies the two
282 chunks of overlapping data */
283 memmove(pkt->data, &pkt->data[vo_len], frame_len - vo_len);
284 pkt->size = frame_len - vo_len;
285 }
286 return 0;
287 }
288
289 /**
290 * Routine to correct a possibly erroneous framerate being fed to us.
291 * Xvid currently chokes on framerates where the ticks per frame is
292 * extremely large. This function works to correct problems in this area
293 * by estimating a new framerate and taking the simpler fraction of
294 * the two presented.
295 *
296 * @param avctx Context that contains the framerate to correct.
297 */
298 static void xvid_correct_framerate(AVCodecContext *avctx)
299 {
300 int frate, fbase;
301 int est_frate, est_fbase;
302 int gcd;
303 float est_fps, fps;
304
305 frate = avctx->time_base.den;
306 fbase = avctx->time_base.num;
307
308 gcd = av_gcd(frate, fbase);
309 if( gcd > 1 ) {
310 frate /= gcd;
311 fbase /= gcd;
312 }
313
314 if( frate <= 65000 && fbase <= 65000 ) {
315 avctx->time_base.den = frate;
316 avctx->time_base.num = fbase;
317 return;
318 }
319
320 fps = (float)frate / (float)fbase;
321 est_fps = roundf(fps * 1000.0) / 1000.0;
322
323 est_frate = (int)est_fps;
324 if( est_fps > (int)est_fps ) {
325 est_frate = (est_frate + 1) * 1000;
326 est_fbase = (int)roundf((float)est_frate / est_fps);
327 } else
328 est_fbase = 1;
329
330 gcd = av_gcd(est_frate, est_fbase);
331 if( gcd > 1 ) {
332 est_frate /= gcd;
333 est_fbase /= gcd;
334 }
335
336 if( fbase > est_fbase ) {
337 avctx->time_base.den = est_frate;
338 avctx->time_base.num = est_fbase;
339 av_log(avctx, AV_LOG_DEBUG,
340 "Xvid: framerate re-estimated: %.2f, %.3f%% correction\n",
341 est_fps, (((est_fps - fps)/fps) * 100.0));
342 } else {
343 avctx->time_base.den = frate;
344 avctx->time_base.num = fbase;
345 }
346 }
347
348 static av_cold int xvid_encode_init(AVCodecContext *avctx) {
349 int xerr, i;
350 int xvid_flags = avctx->flags;
351 struct xvid_context *x = avctx->priv_data;
352 uint16_t *intra, *inter;
353 int fd;
354
355 xvid_plugin_single_t single = { 0 };
356 struct xvid_ff_pass1 rc2pass1 = { 0 };
357 xvid_plugin_2pass2_t rc2pass2 = { 0 };
358 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
359 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
360 xvid_plugin_ssim_t ssim = { 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];
364
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 */
369 if( avctx->trellis
370 )
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;
376
377 /* Decide which ME quality setting to use */
378 x->me_flags = 0;
379 switch( avctx->me_method ) {
380 case ME_FULL: /* Quality 6 */
381 x->me_flags |= XVID_ME_EXTSEARCH16
382 | XVID_ME_EXTSEARCH8;
383
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;
389
390 case ME_LOG: /* Quality 2 */
391 case ME_PHODS:
392 case ME_X1:
393 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
394 | XVID_ME_HALFPELREFINE16;
395
396 case ME_ZERO: /* Quality 0 */
397 default:
398 break;
399 }
400
401 /* Decide how we should decide blocks */
402 switch( avctx->mb_decision ) {
403 case 2:
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;
409 case 1:
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;
414
415 default:
416 break;
417 }
418
419 /* Bring in VOL flags from avconv command-line */
420 #if FF_API_GMC
421 if (avctx->flags & CODEC_FLAG_GMC)
422 x->gmc = 1;
423 #endif
424
425 x->vol_flags = 0;
426 if (x->gmc) {
427 x->vol_flags |= XVID_VOL_GMC;
428 x->me_flags |= XVID_ME_GME_REFINE;
429 }
430 if( xvid_flags & CODEC_FLAG_QPEL ) {
431 x->vol_flags |= XVID_VOL_QUARTERPEL;
432 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
433 if( x->vop_flags & XVID_VOP_INTER4V )
434 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
435 }
436
437 xvid_gbl_init.version = XVID_VERSION;
438 xvid_gbl_init.debug = 0;
439 xvid_gbl_init.cpu_flags = 0;
440
441 /* Initialize */
442 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
443
444 /* Create the encoder reference */
445 xvid_enc_create.version = XVID_VERSION;
446
447 /* Store the desired frame size */
448 xvid_enc_create.width = x->xsize = avctx->width;
449 xvid_enc_create.height = x->ysize = avctx->height;
450
451 /* Xvid can determine the proper profile to use */
452 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
453
454 /* We don't use zones */
455 xvid_enc_create.zones = NULL;
456 xvid_enc_create.num_zones = 0;
457
458 xvid_enc_create.num_threads = avctx->thread_count;
459
460 xvid_enc_create.plugins = plugins;
461 xvid_enc_create.num_plugins = 0;
462
463 /* Initialize Buffers */
464 x->twopassbuffer = NULL;
465 x->old_twopassbuffer = NULL;
466 x->twopassfile = NULL;
467
468 if( xvid_flags & CODEC_FLAG_PASS1 ) {
469 rc2pass1.version = XVID_VERSION;
470 rc2pass1.context = x;
471 x->twopassbuffer = av_malloc(BUFFER_SIZE);
472 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
473 if (!x->twopassbuffer || !x->old_twopassbuffer) {
474 av_log(avctx, AV_LOG_ERROR,
475 "Xvid: Cannot allocate 2-pass log buffers\n");
476 return -1;
477 }
478 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
479
480 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
481 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
482 xvid_enc_create.num_plugins++;
483 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
484 rc2pass2.version = XVID_VERSION;
485 rc2pass2.bitrate = avctx->bit_rate;
486
487 fd = ff_tempfile("xvidff.", &x->twopassfile);
488 if( fd == -1 ) {
489 av_log(avctx, AV_LOG_ERROR,
490 "Xvid: Cannot write 2-pass pipe\n");
491 return -1;
492 }
493
494 if (!avctx->stats_in) {
495 av_log(avctx, AV_LOG_ERROR,
496 "Xvid: No 2-pass information loaded for second pass\n");
497 return -1;
498 }
499
500 if( strlen(avctx->stats_in) >
501 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
502 close(fd);
503 av_log(avctx, AV_LOG_ERROR,
504 "Xvid: Cannot write to 2-pass pipe\n");
505 return -1;
506 }
507
508 close(fd);
509 rc2pass2.filename = x->twopassfile;
510 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
511 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
512 xvid_enc_create.num_plugins++;
513 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
514 /* Single Pass Bitrate Control! */
515 single.version = XVID_VERSION;
516 single.bitrate = avctx->bit_rate;
517
518 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
519 plugins[xvid_enc_create.num_plugins].param = &single;
520 xvid_enc_create.num_plugins++;
521 }
522
523 if (avctx->lumi_masking != 0.0)
524 x->lumi_aq = 1;
525
526 if (x->lumi_aq && x->variance_aq) {
527 x->variance_aq = 0;
528 av_log(avctx, AV_LOG_WARNING,
529 "variance_aq is ignored when lumi_aq is set.\n");
530 }
531
532 /* Luminance Masking */
533 if (x->lumi_aq) {
534 masking_l.method = 0;
535 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
536
537 /* The old behavior is that when avctx->lumi_masking is specified,
538 * plugins[...].param = NULL. Trying to keep the old behavior here. */
539 plugins[xvid_enc_create.num_plugins].param = avctx->lumi_masking ? NULL
540 : &masking_l;
541 xvid_enc_create.num_plugins++;
542 }
543
544 /* Variance AQ */
545 if (x->variance_aq) {
546 masking_v.method = 1;
547 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
548 plugins[xvid_enc_create.num_plugins].param = &masking_v;
549 xvid_enc_create.num_plugins++;
550 }
551
552 /* SSIM */
553 if (x->ssim) {
554 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_ssim;
555 ssim.b_printstat = x->ssim == 2;
556 ssim.acc = x->ssim_acc;
557 ssim.cpu_flags = xvid_gbl_init.cpu_flags;
558 ssim.b_visualize = 0;
559 plugins[xvid_enc_create.num_plugins].param = &ssim;
560 xvid_enc_create.num_plugins++;
561 }
562
563 /* Frame Rate and Key Frames */
564 xvid_correct_framerate(avctx);
565 xvid_enc_create.fincr = avctx->time_base.num;
566 xvid_enc_create.fbase = avctx->time_base.den;
567 if( avctx->gop_size > 0 )
568 xvid_enc_create.max_key_interval = avctx->gop_size;
569 else
570 xvid_enc_create.max_key_interval = 240; /* Xvid's best default */
571
572 /* Quants */
573 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
574 else x->qscale = 0;
575
576 xvid_enc_create.min_quant[0] = avctx->qmin;
577 xvid_enc_create.min_quant[1] = avctx->qmin;
578 xvid_enc_create.min_quant[2] = avctx->qmin;
579 xvid_enc_create.max_quant[0] = avctx->qmax;
580 xvid_enc_create.max_quant[1] = avctx->qmax;
581 xvid_enc_create.max_quant[2] = avctx->qmax;
582
583 /* Quant Matrices */
584 x->intra_matrix = x->inter_matrix = NULL;
585 if( avctx->mpeg_quant )
586 x->vol_flags |= XVID_VOL_MPEGQUANT;
587 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
588 x->vol_flags |= XVID_VOL_MPEGQUANT;
589
590 if( avctx->intra_matrix ) {
591 intra = avctx->intra_matrix;
592 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
593 } else
594 intra = NULL;
595 if( avctx->inter_matrix ) {
596 inter = avctx->inter_matrix;
597 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
598 } else
599 inter = NULL;
600
601 for( i = 0; i < 64; i++ ) {
602 if( intra )
603 x->intra_matrix[i] = (unsigned char)intra[i];
604 if( inter )
605 x->inter_matrix[i] = (unsigned char)inter[i];
606 }
607 }
608
609 /* Misc Settings */
610 xvid_enc_create.frame_drop_ratio = 0;
611 xvid_enc_create.global = 0;
612 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
613 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
614
615 /* Determines which codec mode we are operating in */
616 avctx->extradata = NULL;
617 avctx->extradata_size = 0;
618 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
619 /* In this case, we are claiming to be MPEG4 */
620 x->quicktime_format = 1;
621 avctx->codec_id = AV_CODEC_ID_MPEG4;
622 } else {
623 /* We are claiming to be Xvid */
624 x->quicktime_format = 0;
625 if(!avctx->codec_tag)
626 avctx->codec_tag = AV_RL32("xvid");
627 }
628
629 /* Bframes */
630 xvid_enc_create.max_bframes = avctx->max_b_frames;
631 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
632 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
633 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
634
635 /* Create encoder context */
636 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
637 if( xerr ) {
638 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
639 return -1;
640 }
641
642 x->encoder_handle = xvid_enc_create.handle;
643 avctx->coded_frame = av_frame_alloc();
644 if (!avctx->coded_frame)
645 return AVERROR(ENOMEM);
646
647 return 0;
648 }
649
650 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
651 const AVFrame *picture, int *got_packet)
652 {
653 int xerr, i, ret, user_packet = !!pkt->data;
654 char *tmp;
655 struct xvid_context *x = avctx->priv_data;
656 AVFrame *p = avctx->coded_frame;
657 int mb_width = (avctx->width + 15) / 16;
658 int mb_height = (avctx->height + 15) / 16;
659
660 xvid_enc_frame_t xvid_enc_frame = { 0 };
661 xvid_enc_stats_t xvid_enc_stats = { 0 };
662
663 if (!user_packet &&
664 (ret = av_new_packet(pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
665 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
666 return ret;
667 }
668
669 /* Start setting up the frame */
670 xvid_enc_frame.version = XVID_VERSION;
671 xvid_enc_stats.version = XVID_VERSION;
672
673 /* Let Xvid know where to put the frame. */
674 xvid_enc_frame.bitstream = pkt->data;
675 xvid_enc_frame.length = pkt->size;
676
677 /* Initialize input image fields */
678 if( avctx->pix_fmt != AV_PIX_FMT_YUV420P ) {
679 av_log(avctx, AV_LOG_ERROR, "Xvid: Color spaces other than 420p not supported\n");
680 return -1;
681 }
682
683 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
684
685 for( i = 0; i < 4; i++ ) {
686 xvid_enc_frame.input.plane[i] = picture->data[i];
687 xvid_enc_frame.input.stride[i] = picture->linesize[i];
688 }
689
690 /* Encoder Flags */
691 xvid_enc_frame.vop_flags = x->vop_flags;
692 xvid_enc_frame.vol_flags = x->vol_flags;
693 xvid_enc_frame.motion = x->me_flags;
694 xvid_enc_frame.type =
695 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
696 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
697 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
698 XVID_TYPE_AUTO;
699
700 /* Pixel aspect ratio setting */
701 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
702 avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
703 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
704 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
705 return -1;
706 }
707 xvid_enc_frame.par = XVID_PAR_EXT;
708 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
709 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
710
711 /* Quant Setting */
712 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
713 else xvid_enc_frame.quant = 0;
714
715 /* Matrices */
716 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
717 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
718
719 /* Encode */
720 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
721 &xvid_enc_frame, &xvid_enc_stats);
722
723 /* Two-pass log buffer swapping */
724 avctx->stats_out = NULL;
725 if( x->twopassbuffer ) {
726 tmp = x->old_twopassbuffer;
727 x->old_twopassbuffer = x->twopassbuffer;
728 x->twopassbuffer = tmp;
729 x->twopassbuffer[0] = 0;
730 if( x->old_twopassbuffer[0] != 0 ) {
731 avctx->stats_out = x->old_twopassbuffer;
732 }
733 }
734
735 if (xerr > 0) {
736 *got_packet = 1;
737
738 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
739 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
740 p->pict_type = AV_PICTURE_TYPE_P;
741 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
742 p->pict_type = AV_PICTURE_TYPE_B;
743 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
744 p->pict_type = AV_PICTURE_TYPE_S;
745 else
746 p->pict_type = AV_PICTURE_TYPE_I;
747 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
748 p->key_frame = 1;
749 pkt->flags |= AV_PKT_FLAG_KEY;
750 if( x->quicktime_format )
751 return xvid_strip_vol_header(avctx, pkt,
752 xvid_enc_stats.hlength, xerr);
753 } else
754 p->key_frame = 0;
755
756 pkt->size = xerr;
757
758 return 0;
759 } else {
760 if (!user_packet)
761 av_free_packet(pkt);
762 if (!xerr)
763 return 0;
764 av_log(avctx, AV_LOG_ERROR, "Xvid: Encoding Error Occurred: %i\n", xerr);
765 return -1;
766 }
767 }
768
769 static av_cold int xvid_encode_close(AVCodecContext *avctx) {
770 struct xvid_context *x = avctx->priv_data;
771
772 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
773
774 av_freep(&avctx->extradata);
775 if (x->twopassbuffer) {
776 av_free(x->twopassbuffer);
777 av_free(x->old_twopassbuffer);
778 }
779 av_free(x->twopassfile);
780 av_free(x->intra_matrix);
781 av_free(x->inter_matrix);
782
783 return 0;
784 }
785
786 #define OFFSET(x) offsetof(struct xvid_context, x)
787 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
788 static const AVOption options[] = {
789 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
790 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
791 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
792 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
793 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
794 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
795 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
796 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
797 { NULL },
798 };
799
800 static const AVClass xvid_class = {
801 .class_name = "libxvid",
802 .item_name = av_default_item_name,
803 .option = options,
804 .version = LIBAVUTIL_VERSION_INT,
805 };
806
807 AVCodec ff_libxvid_encoder = {
808 .name = "libxvid",
809 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
810 .type = AVMEDIA_TYPE_VIDEO,
811 .id = AV_CODEC_ID_MPEG4,
812 .priv_data_size = sizeof(struct xvid_context),
813 .init = xvid_encode_init,
814 .encode2 = xvid_encode_frame,
815 .close = xvid_encode_close,
816 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
817 .priv_class = &xvid_class,
818 };