libxvid: K&R formatting cosmetics
[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 <unistd.h>
29 #include <xvid.h>
30
31 #include "libavutil/cpu.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/mathematics.h"
34
35 #include "avcodec.h"
36 #include "libxvid.h"
37 #include "mpegvideo.h"
38
39 /**
40 * Buffer management macros.
41 */
42 #define BUFFER_SIZE 1024
43 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
44 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
45
46 /**
47 * Structure for the private Xvid context.
48 * This stores all the private context for the codec.
49 */
50 struct xvid_context {
51 AVClass *class; /**< Handle for Xvid encoder */
52 void *encoder_handle; /**< Handle for Xvid encoder */
53 int xsize; /**< Frame x size */
54 int ysize; /**< Frame y size */
55 int vop_flags; /**< VOP flags for Xvid encoder */
56 int vol_flags; /**< VOL flags for Xvid encoder */
57 int me_flags; /**< Motion Estimation flags */
58 int qscale; /**< Do we use constant scale? */
59 int quicktime_format; /**< Are we in a QT-based format? */
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 */
65 int lumi_aq; /**< Lumi masking as an aq method */
66 int variance_aq; /**< Variance adaptive quantization */
67 int ssim; /**< SSIM information display mode */
68 int ssim_acc; /**< SSIM accuracy. 0: accurate. 4: fast. */
69 int gmc;
70 };
71
72 /**
73 * Structure for the private first-pass plugin.
74 */
75 struct xvid_ff_pass1 {
76 int version; /**< Xvid version */
77 struct xvid_context *context; /**< Pointer to private context */
78 };
79
80 /*
81 * Xvid 2-Pass Kludge Section
82 *
83 * Xvid's default 2-pass doesn't allow us to create data as we need to, so
84 * this section spends time replacing the first pass plugin so we can write
85 * statistic information as libavcodec requests in. We have another kludge
86 * that allows us to pass data to the second pass in Xvid without a custom
87 * rate-control plugin.
88 */
89
90 /**
91 * Initialize the two-pass plugin and context.
92 *
93 * @param param Input construction parameter structure
94 * @param handle Private context handle
95 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
96 */
97 static int xvid_ff_2pass_create(xvid_plg_create_t *param, void **handle)
98 {
99 struct xvid_ff_pass1 *x = (struct xvid_ff_pass1 *) param->param;
100 char *log = x->context->twopassbuffer;
101
102 /* Do a quick bounds check */
103 if (!log)
104 return XVID_ERR_FAIL;
105
106 /* We use snprintf() */
107 /* This is because we can safely prevent a buffer overflow */
108 log[0] = 0;
109 snprintf(log, BUFFER_REMAINING(log),
110 "# avconv 2-pass log file, using xvid codec\n");
111 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
112 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
113 XVID_VERSION_MAJOR(XVID_VERSION),
114 XVID_VERSION_MINOR(XVID_VERSION),
115 XVID_VERSION_PATCH(XVID_VERSION));
116
117 *handle = x->context;
118 return 0;
119 }
120
121 /**
122 * Destroy the two-pass plugin context.
123 *
124 * @param ref Context pointer for the plugin
125 * @param param Destrooy context
126 * @return Returns 0, success guaranteed
127 */
128 static int xvid_ff_2pass_destroy(struct xvid_context *ref,
129 xvid_plg_destroy_t *param)
130 {
131 /* Currently cannot think of anything to do on destruction */
132 /* Still, the framework should be here for reference/use */
133 if (ref->twopassbuffer)
134 ref->twopassbuffer[0] = 0;
135 return 0;
136 }
137
138 /**
139 * Enable fast encode mode during the first pass.
140 *
141 * @param ref Context pointer for the plugin
142 * @param param Frame data
143 * @return Returns 0, success guaranteed
144 */
145 static int xvid_ff_2pass_before(struct xvid_context *ref,
146 xvid_plg_data_t *param)
147 {
148 int motion_remove;
149 int motion_replacements;
150 int vop_remove;
151
152 /* Nothing to do here, result is changed too much */
153 if (param->zone && param->zone->mode == XVID_ZONE_QUANT)
154 return 0;
155
156 /* We can implement a 'turbo' first pass mode here */
157 param->quant = 2;
158
159 /* Init values */
160 motion_remove = ~XVID_ME_CHROMA_PVOP &
161 ~XVID_ME_CHROMA_BVOP &
162 ~XVID_ME_EXTSEARCH16 &
163 ~XVID_ME_ADVANCEDDIAMOND16;
164 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
165 XVID_ME_SKIP_DELTASEARCH |
166 XVID_ME_FASTREFINE16 |
167 XVID_ME_BFRAME_EARLYSTOP;
168 vop_remove = ~XVID_VOP_MODEDECISION_RD &
169 ~XVID_VOP_FAST_MODEDECISION_RD &
170 ~XVID_VOP_TRELLISQUANT &
171 ~XVID_VOP_INTER4V &
172 ~XVID_VOP_HQACPRED;
173
174 param->vol_flags &= ~XVID_VOL_GMC;
175 param->vop_flags &= vop_remove;
176 param->motion_flags &= motion_remove;
177 param->motion_flags |= motion_replacements;
178
179 return 0;
180 }
181
182 /**
183 * Capture statistic data and write it during first pass.
184 *
185 * @param ref Context pointer for the plugin
186 * @param param Statistic data
187 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
188 */
189 static int xvid_ff_2pass_after(struct xvid_context *ref,
190 xvid_plg_data_t *param)
191 {
192 char *log = ref->twopassbuffer;
193 const char *frame_types = " ipbs";
194 char frame_type;
195
196 /* Quick bounds check */
197 if (!log)
198 return XVID_ERR_FAIL;
199
200 /* Convert the type given to us into a character */
201 if (param->type < 5 && param->type > 0)
202 frame_type = frame_types[param->type];
203 else
204 return XVID_ERR_FAIL;
205
206 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
207 "%c %d %d %d %d %d %d\n",
208 frame_type, param->stats.quant, param->stats.kblks,
209 param->stats.mblks, param->stats.ublks,
210 param->stats.length, param->stats.hlength);
211
212 return 0;
213 }
214
215 /**
216 * Dispatch function for our custom plugin.
217 * This handles the dispatch for the Xvid plugin. It passes data
218 * on to other functions for actual processing.
219 *
220 * @param ref Context pointer for the plugin
221 * @param cmd The task given for us to complete
222 * @param p1 First parameter (varies)
223 * @param p2 Second parameter (varies)
224 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
225 */
226 static int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2)
227 {
228 switch (cmd) {
229 case XVID_PLG_INFO:
230 case XVID_PLG_FRAME:
231 return 0;
232 case XVID_PLG_BEFORE:
233 return xvid_ff_2pass_before(ref, p1);
234 case XVID_PLG_CREATE:
235 return xvid_ff_2pass_create(p1, p2);
236 case XVID_PLG_AFTER:
237 return xvid_ff_2pass_after(ref, p1);
238 case XVID_PLG_DESTROY:
239 return xvid_ff_2pass_destroy(ref, p1);
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, AVPacket *pkt,
259 unsigned int header_len,
260 unsigned int frame_len)
261 {
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 {
350 int xerr, i;
351 int xvid_flags = avctx->flags;
352 struct xvid_context *x = avctx->priv_data;
353 uint16_t *intra, *inter;
354 int fd;
355
356 xvid_plugin_single_t single = { 0 };
357 struct xvid_ff_pass1 rc2pass1 = { 0 };
358 xvid_plugin_2pass2_t rc2pass2 = { 0 };
359 xvid_plugin_lumimasking_t masking_l = { 0 }; /* For lumi masking */
360 xvid_plugin_lumimasking_t masking_v = { 0 }; /* For variance AQ */
361 xvid_plugin_ssim_t ssim = { 0 };
362 xvid_gbl_init_t xvid_gbl_init = { 0 };
363 xvid_enc_create_t xvid_enc_create = { 0 };
364 xvid_enc_plugin_t plugins[7];
365
366 /* Bring in VOP flags from avconv command-line */
367 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
368 if (xvid_flags & CODEC_FLAG_4MV)
369 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
370 if (avctx->trellis)
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 default:
415 break;
416 }
417
418 /* Bring in VOL flags from avconv command-line */
419 #if FF_API_GMC
420 if (avctx->flags & CODEC_FLAG_GMC)
421 x->gmc = 1;
422 #endif
423
424 x->vol_flags = 0;
425 if (x->gmc) {
426 x->vol_flags |= XVID_VOL_GMC;
427 x->me_flags |= XVID_ME_GME_REFINE;
428 }
429 if (xvid_flags & CODEC_FLAG_QPEL) {
430 x->vol_flags |= XVID_VOL_QUARTERPEL;
431 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
432 if (x->vop_flags & XVID_VOP_INTER4V)
433 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
434 }
435
436 xvid_gbl_init.version = XVID_VERSION;
437 xvid_gbl_init.debug = 0;
438 xvid_gbl_init.cpu_flags = 0;
439
440 /* Initialize */
441 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
442
443 /* Create the encoder reference */
444 xvid_enc_create.version = XVID_VERSION;
445
446 /* Store the desired frame size */
447 xvid_enc_create.width =
448 x->xsize = avctx->width;
449 xvid_enc_create.height =
450 x->ysize = avctx->height;
451
452 /* Xvid can determine the proper profile to use */
453 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
454
455 /* We don't use zones */
456 xvid_enc_create.zones = NULL;
457 xvid_enc_create.num_zones = 0;
458
459 xvid_enc_create.num_threads = avctx->thread_count;
460
461 xvid_enc_create.plugins = plugins;
462 xvid_enc_create.num_plugins = 0;
463
464 /* Initialize Buffers */
465 x->twopassbuffer = NULL;
466 x->old_twopassbuffer = NULL;
467 x->twopassfile = NULL;
468
469 if (xvid_flags & CODEC_FLAG_PASS1) {
470 rc2pass1.version = XVID_VERSION;
471 rc2pass1.context = x;
472 x->twopassbuffer = av_malloc(BUFFER_SIZE);
473 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
474 if (!x->twopassbuffer || !x->old_twopassbuffer) {
475 av_log(avctx, AV_LOG_ERROR,
476 "Xvid: Cannot allocate 2-pass log buffers\n");
477 return -1;
478 }
479 x->twopassbuffer[0] =
480 x->old_twopassbuffer[0] = 0;
481
482 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
483 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
484 xvid_enc_create.num_plugins++;
485 } else if (xvid_flags & CODEC_FLAG_PASS2) {
486 rc2pass2.version = XVID_VERSION;
487 rc2pass2.bitrate = avctx->bit_rate;
488
489 fd = ff_tempfile("xvidff.", &x->twopassfile);
490 if (fd == -1) {
491 av_log(avctx, AV_LOG_ERROR, "Xvid: Cannot write 2-pass pipe\n");
492 return -1;
493 }
494
495 if (!avctx->stats_in) {
496 av_log(avctx, AV_LOG_ERROR,
497 "Xvid: No 2-pass information loaded for second pass\n");
498 return -1;
499 }
500
501 if (strlen(avctx->stats_in) >
502 write(fd, avctx->stats_in, strlen(avctx->stats_in))) {
503 close(fd);
504 av_log(avctx, AV_LOG_ERROR, "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 =
540 avctx->lumi_masking ? NULL : &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)
574 x->qscale = 1;
575 else
576 x->qscale = 0;
577
578 xvid_enc_create.min_quant[0] = avctx->qmin;
579 xvid_enc_create.min_quant[1] = avctx->qmin;
580 xvid_enc_create.min_quant[2] = avctx->qmin;
581 xvid_enc_create.max_quant[0] = avctx->qmax;
582 xvid_enc_create.max_quant[1] = avctx->qmax;
583 xvid_enc_create.max_quant[2] = avctx->qmax;
584
585 /* Quant Matrices */
586 x->intra_matrix =
587 x->inter_matrix = NULL;
588 if (avctx->mpeg_quant)
589 x->vol_flags |= XVID_VOL_MPEGQUANT;
590 if ((avctx->intra_matrix || avctx->inter_matrix)) {
591 x->vol_flags |= XVID_VOL_MPEGQUANT;
592
593 if (avctx->intra_matrix) {
594 intra = avctx->intra_matrix;
595 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
596 } else
597 intra = NULL;
598 if (avctx->inter_matrix) {
599 inter = avctx->inter_matrix;
600 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
601 } else
602 inter = NULL;
603
604 for (i = 0; i < 64; i++) {
605 if (intra)
606 x->intra_matrix[i] = (unsigned char) intra[i];
607 if (inter)
608 x->inter_matrix[i] = (unsigned char) inter[i];
609 }
610 }
611
612 /* Misc Settings */
613 xvid_enc_create.frame_drop_ratio = 0;
614 xvid_enc_create.global = 0;
615 if (xvid_flags & CODEC_FLAG_CLOSED_GOP)
616 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
617
618 /* Determines which codec mode we are operating in */
619 avctx->extradata = NULL;
620 avctx->extradata_size = 0;
621 if (xvid_flags & CODEC_FLAG_GLOBAL_HEADER) {
622 /* In this case, we are claiming to be MPEG4 */
623 x->quicktime_format = 1;
624 avctx->codec_id = AV_CODEC_ID_MPEG4;
625 } else {
626 /* We are claiming to be Xvid */
627 x->quicktime_format = 0;
628 if (!avctx->codec_tag)
629 avctx->codec_tag = AV_RL32("xvid");
630 }
631
632 /* Bframes */
633 xvid_enc_create.max_bframes = avctx->max_b_frames;
634 xvid_enc_create.bquant_offset = 100 * avctx->b_quant_offset;
635 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
636 if (avctx->max_b_frames > 0 && !x->quicktime_format)
637 xvid_enc_create.global |= XVID_GLOBAL_PACKED;
638
639 /* Create encoder context */
640 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
641 if (xerr) {
642 av_log(avctx, AV_LOG_ERROR, "Xvid: Could not create encoder reference\n");
643 return -1;
644 }
645
646 x->encoder_handle = xvid_enc_create.handle;
647 avctx->coded_frame = av_frame_alloc();
648 if (!avctx->coded_frame)
649 return AVERROR(ENOMEM);
650
651 return 0;
652 }
653
654 static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
655 const AVFrame *picture, int *got_packet)
656 {
657 int xerr, i, ret, user_packet = !!pkt->data;
658 struct xvid_context *x = avctx->priv_data;
659 AVFrame *p = avctx->coded_frame;
660 int mb_width = (avctx->width + 15) / 16;
661 int mb_height = (avctx->height + 15) / 16;
662 char *tmp;
663
664 xvid_enc_frame_t xvid_enc_frame = { 0 };
665 xvid_enc_stats_t xvid_enc_stats = { 0 };
666
667 if (!user_packet &&
668 (ret = av_new_packet(pkt, mb_width * mb_height * MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0) {
669 av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
670 return ret;
671 }
672
673 /* Start setting up the frame */
674 xvid_enc_frame.version = XVID_VERSION;
675 xvid_enc_stats.version = XVID_VERSION;
676
677 /* Let Xvid know where to put the frame. */
678 xvid_enc_frame.bitstream = pkt->data;
679 xvid_enc_frame.length = pkt->size;
680
681 /* Initialize input image fields */
682 if (avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
683 av_log(avctx, AV_LOG_ERROR,
684 "Xvid: Color spaces other than 420P not supported\n");
685 return -1;
686 }
687
688 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
689
690 for (i = 0; i < 4; i++) {
691 xvid_enc_frame.input.plane[i] = picture->data[i];
692 xvid_enc_frame.input.stride[i] = picture->linesize[i];
693 }
694
695 /* Encoder Flags */
696 xvid_enc_frame.vop_flags = x->vop_flags;
697 xvid_enc_frame.vol_flags = x->vol_flags;
698 xvid_enc_frame.motion = x->me_flags;
699 xvid_enc_frame.type =
700 picture->pict_type == AV_PICTURE_TYPE_I ? XVID_TYPE_IVOP :
701 picture->pict_type == AV_PICTURE_TYPE_P ? XVID_TYPE_PVOP :
702 picture->pict_type == AV_PICTURE_TYPE_B ? XVID_TYPE_BVOP :
703 XVID_TYPE_AUTO;
704
705 /* Pixel aspect ratio setting */
706 if (avctx->sample_aspect_ratio.num < 1 || avctx->sample_aspect_ratio.num > 255 ||
707 avctx->sample_aspect_ratio.den < 1 || avctx->sample_aspect_ratio.den > 255) {
708 av_log(avctx, AV_LOG_ERROR, "Invalid pixel aspect ratio %i/%i\n",
709 avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den);
710 return -1;
711 }
712 xvid_enc_frame.par = XVID_PAR_EXT;
713 xvid_enc_frame.par_width = avctx->sample_aspect_ratio.num;
714 xvid_enc_frame.par_height = avctx->sample_aspect_ratio.den;
715
716 /* Quant Setting */
717 if (x->qscale)
718 xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
719 else
720 xvid_enc_frame.quant = 0;
721
722 /* Matrices */
723 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
724 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
725
726 /* Encode */
727 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
728 &xvid_enc_frame, &xvid_enc_stats);
729
730 /* Two-pass log buffer swapping */
731 avctx->stats_out = NULL;
732 if (x->twopassbuffer) {
733 tmp = x->old_twopassbuffer;
734 x->old_twopassbuffer = x->twopassbuffer;
735 x->twopassbuffer = tmp;
736 x->twopassbuffer[0] = 0;
737 if (x->old_twopassbuffer[0] != 0) {
738 avctx->stats_out = x->old_twopassbuffer;
739 }
740 }
741
742 if (xerr > 0) {
743 *got_packet = 1;
744
745 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
746 if (xvid_enc_stats.type == XVID_TYPE_PVOP)
747 p->pict_type = AV_PICTURE_TYPE_P;
748 else if (xvid_enc_stats.type == XVID_TYPE_BVOP)
749 p->pict_type = AV_PICTURE_TYPE_B;
750 else if (xvid_enc_stats.type == XVID_TYPE_SVOP)
751 p->pict_type = AV_PICTURE_TYPE_S;
752 else
753 p->pict_type = AV_PICTURE_TYPE_I;
754 if (xvid_enc_frame.out_flags & XVID_KEYFRAME) {
755 p->key_frame = 1;
756 pkt->flags |= AV_PKT_FLAG_KEY;
757 if (x->quicktime_format)
758 return xvid_strip_vol_header(avctx, pkt,
759 xvid_enc_stats.hlength, xerr);
760 } else
761 p->key_frame = 0;
762
763 pkt->size = xerr;
764
765 return 0;
766 } else {
767 if (!user_packet)
768 av_free_packet(pkt);
769 if (!xerr)
770 return 0;
771 av_log(avctx, AV_LOG_ERROR,
772 "Xvid: Encoding Error Occurred: %i\n", xerr);
773 return -1;
774 }
775 }
776
777 static av_cold int xvid_encode_close(AVCodecContext *avctx)
778 {
779 struct xvid_context *x = avctx->priv_data;
780
781 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
782
783 av_freep(&avctx->extradata);
784 if (x->twopassbuffer) {
785 av_free(x->twopassbuffer);
786 av_free(x->old_twopassbuffer);
787 }
788 av_free(x->twopassfile);
789 av_free(x->intra_matrix);
790 av_free(x->inter_matrix);
791
792 return 0;
793 }
794
795 #define OFFSET(x) offsetof(struct xvid_context, x)
796 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
797 static const AVOption options[] = {
798 { "lumi_aq", "Luminance masking AQ", OFFSET(lumi_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
799 { "variance_aq", "Variance AQ", OFFSET(variance_aq), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
800 { "ssim", "Show SSIM information to stdout", OFFSET(ssim), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, VE, "ssim" },
801 { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, "ssim" },
802 { "avg", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "ssim" },
803 { "frame", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "ssim" },
804 { "ssim_acc", "SSIM accuracy", OFFSET(ssim_acc), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, 4, VE },
805 { "gmc", "use GMC", OFFSET(gmc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
806 { NULL },
807 };
808
809 static const AVClass xvid_class = {
810 .class_name = "libxvid",
811 .item_name = av_default_item_name,
812 .option = options,
813 .version = LIBAVUTIL_VERSION_INT,
814 };
815
816 AVCodec ff_libxvid_encoder = {
817 .name = "libxvid",
818 .long_name = NULL_IF_CONFIG_SMALL("libxvidcore MPEG-4 part 2"),
819 .type = AVMEDIA_TYPE_VIDEO,
820 .id = AV_CODEC_ID_MPEG4,
821 .priv_data_size = sizeof(struct xvid_context),
822 .init = xvid_encode_init,
823 .encode2 = xvid_encode_frame,
824 .close = xvid_encode_close,
825 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
826 .priv_class = &xvid_class,
827 };