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r955: Fix the Diffkey icon.
[cinelerra_cv.git] / quicktime / ffmpeg / libavcodec / xvidff.c
blob9156b2e47feb04b27c9c107f81f64f13e39bffd0
1 /*
2 * Interface to xvidcore for mpeg4 encoding
3 * Copyright (c) 2004 Adam Thayer <krevnik@comcast.net>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 /**
21 * @file xvidmpeg4.c
22 * Interface to xvidcore for MPEG-4 compliant encoding.
23 * @author Adam Thayer (krevnik@comcast.net)
24 */
25
26 #include <xvid.h>
27 #include <unistd.h>
28 #include "common.h"
29 #include "avcodec.h"
30
31 /**
32 * Buffer management macros.
33 */
34 #define BUFFER_SIZE 1024
35 #define BUFFER_REMAINING(x) (BUFFER_SIZE - strlen(x))
36 #define BUFFER_CAT(x) (&((x)[strlen(x)]))
37
38 /* For PPC Use */
39 #if HAVE_ALTIVEC==1
40 extern int has_altivec(void);
41 #endif
42
43 /**
44 * Structure for the private XviD context.
45 * This stores all the private context for the codec.
46 */
47 typedef struct xvid_context {
48 void *encoder_handle; /** Handle for XviD Encoder */
49 int xsize, ysize; /** Frame size */
50 int vop_flags; /** VOP flags for XviD Encoder */
51 int vol_flags; /** VOL flags for XviD Encoder */
52 int me_flags; /** Motion Estimation flags */
53 int qscale; /** Do we use constant scale? */
54 int quicktime_format; /** Are we in a QT-based format? */
55 AVFrame encoded_picture; /** Encoded frame information */
56 char *twopassbuffer; /** Character buffer for two-pass */
57 char *old_twopassbuffer; /** Old character buffer (two-pass) */
58 char *twopassfile; /** second pass temp file name */
59 unsigned char *intra_matrix; /** P-Frame Quant Matrix */
60 unsigned char *inter_matrix; /** I-Frame Quant Matrix */
61 } xvid_context_t;
62
63 /**
64 * Structure for the private first-pass plugin.
65 */
66 typedef struct xvid_ff_pass1 {
67 int version; /** XviD version */
68 xvid_context_t *context; /** Pointer to private context */
69 } xvid_ff_pass1_t;
70
71 /* Prototypes - See function implementation for details */
72 int xvid_strip_vol_header(AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len);
73 int xvid_ff_2pass(void *ref, int opt, void *p1, void *p2);
74 void xvid_correct_framerate(AVCodecContext *avctx);
75
76 /**
77 * Creates the private context for the encoder.
78 * All buffers are allocated, settings are loaded from the user,
79 * and the encoder context created.
80 *
81 * @param avctx AVCodecContext pointer to context
82 * @return Returns 0 on success, -1 on failure
83 */
84 int ff_xvid_encode_init(AVCodecContext *avctx) {
85 int xerr, i;
86 int xvid_flags = avctx->flags;
87 xvid_context_t *x = avctx->priv_data;
88 uint16_t *intra, *inter;
89 int fd;
90
91 xvid_plugin_single_t single;
92 xvid_ff_pass1_t rc2pass1;
93 xvid_plugin_2pass2_t rc2pass2;
94 xvid_gbl_init_t xvid_gbl_init;
95 xvid_enc_create_t xvid_enc_create;
96 xvid_enc_plugin_t plugins[7];
97
98 /* Bring in VOP flags from ffmpeg command-line */
99 x->vop_flags = XVID_VOP_HALFPEL; /* Bare minimum quality */
100 if( xvid_flags & CODEC_FLAG_4MV )
101 x->vop_flags |= XVID_VOP_INTER4V; /* Level 3 */
102 if( xvid_flags & CODEC_FLAG_TRELLIS_QUANT)
103 x->vop_flags |= XVID_VOP_TRELLISQUANT; /* Level 5 */
104 if( xvid_flags & CODEC_FLAG_AC_PRED )
105 x->vop_flags |= XVID_VOP_HQACPRED; /* Level 6 */
106 if( xvid_flags & CODEC_FLAG_GRAY )
107 x->vop_flags |= XVID_VOP_GREYSCALE;
108
109 /* Decide which ME quality setting to use */
110 x->me_flags = 0;
111 switch( avctx->me_method ) {
112 case ME_FULL: /* Quality 6 */
113 x->me_flags |= XVID_ME_EXTSEARCH16
114 | XVID_ME_EXTSEARCH8;
115
116 case ME_EPZS: /* Quality 4 */
117 x->me_flags |= XVID_ME_ADVANCEDDIAMOND8
118 | XVID_ME_HALFPELREFINE8
119 | XVID_ME_CHROMA_PVOP
120 | XVID_ME_CHROMA_BVOP;
121
122 case ME_LOG: /* Quality 2 */
123 case ME_PHODS:
124 case ME_X1:
125 x->me_flags |= XVID_ME_ADVANCEDDIAMOND16
126 | XVID_ME_HALFPELREFINE16;
127
128 case ME_ZERO: /* Quality 0 */
129 default:
130 break;
131 }
132
133 /* Decide how we should decide blocks */
134 switch( avctx->mb_decision ) {
135 case 2:
136 x->vop_flags |= XVID_VOP_MODEDECISION_RD;
137 x->me_flags |= XVID_ME_HALFPELREFINE8_RD
138 | XVID_ME_QUARTERPELREFINE8_RD
139 | XVID_ME_EXTSEARCH_RD
140 | XVID_ME_CHECKPREDICTION_RD;
141 case 1:
142 if( !(x->vop_flags & XVID_VOP_MODEDECISION_RD) )
143 x->vop_flags |= XVID_VOP_FAST_MODEDECISION_RD;
144 x->me_flags |= XVID_ME_HALFPELREFINE16_RD
145 | XVID_ME_QUARTERPELREFINE16_RD;
146
147 default:
148 break;
149 }
150
151 /* Bring in VOL flags from ffmpeg command-line */
152 x->vol_flags = 0;
153 if( xvid_flags & CODEC_FLAG_GMC ) {
154 x->vol_flags |= XVID_VOL_GMC;
155 x->me_flags |= XVID_ME_GME_REFINE;
156 }
157 if( xvid_flags & CODEC_FLAG_QPEL ) {
158 x->vol_flags |= XVID_VOL_QUARTERPEL;
159 x->me_flags |= XVID_ME_QUARTERPELREFINE16;
160 if( x->vop_flags & XVID_VOP_INTER4V )
161 x->me_flags |= XVID_ME_QUARTERPELREFINE8;
162 }
163
164 memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
165 xvid_gbl_init.version = XVID_VERSION;
166 xvid_gbl_init.debug = 0;
167
168 #ifdef ARCH_POWERPC
169 /* XviD's PPC support is borked, use libavcodec to detect */
170 #if HAVE_ALTIVEC==1
171 if( has_altivec() ) {
172 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE | XVID_CPU_ALTIVEC;
173 } else
174 #endif
175 xvid_gbl_init.cpu_flags = XVID_CPU_FORCE;
176 #else
177 /* XviD can detect on x86 */
178 xvid_gbl_init.cpu_flags = 0;
179 #endif
180
181 /* Initialize */
182 xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
183
184 /* Create the encoder reference */
185 memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
186 xvid_enc_create.version = XVID_VERSION;
187
188 /* Store the desired frame size */
189 xvid_enc_create.width = x->xsize = avctx->width;
190 xvid_enc_create.height = x->ysize = avctx->height;
191
192 /* XviD can determine the proper profile to use */
193 /* xvid_enc_create.profile = XVID_PROFILE_S_L3; */
194
195 /* We don't use zones or threads */
196 xvid_enc_create.zones = NULL;
197 xvid_enc_create.num_zones = 0;
198 xvid_enc_create.num_threads = 0;
199
200 xvid_enc_create.plugins = plugins;
201 xvid_enc_create.num_plugins = 0;
202
203 /* Initialize Buffers */
204 x->twopassbuffer = NULL;
205 x->old_twopassbuffer = NULL;
206 x->twopassfile = NULL;
207
208 if( xvid_flags & CODEC_FLAG_PASS1 ) {
209 memset(&rc2pass1, 0, sizeof(xvid_ff_pass1_t));
210 rc2pass1.version = XVID_VERSION;
211 rc2pass1.context = x;
212 x->twopassbuffer = av_malloc(BUFFER_SIZE);
213 x->old_twopassbuffer = av_malloc(BUFFER_SIZE);
214 if( x->twopassbuffer == NULL || x->old_twopassbuffer == NULL ) {
215 av_log(avctx, AV_LOG_ERROR,
216 "XviD: Cannot allocate 2-pass log buffers\n");
217 return -1;
218 }
219 x->twopassbuffer[0] = x->old_twopassbuffer[0] = 0;
220
221 plugins[xvid_enc_create.num_plugins].func = xvid_ff_2pass;
222 plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
223 xvid_enc_create.num_plugins++;
224 } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
225 memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
226 rc2pass2.version = XVID_VERSION;
227 rc2pass2.bitrate = avctx->bit_rate;
228
229 x->twopassfile = av_malloc(BUFFER_SIZE);
230 if( x->twopassfile == NULL ) {
231 av_log(avctx, AV_LOG_ERROR,
232 "XviD: Cannot allocate 2-pass buffer\n");
233 return -1;
234 }
235 strcpy(x->twopassfile, "/tmp/xvidff.XXXXXX");
236 fd = mkstemp(x->twopassfile);
237 if(fd < 0){
238 strcpy(x->twopassfile, "./xvidff.XXXXXX");
239 fd = mkstemp(x->twopassfile);
240 }
241 if( fd == -1 ) {
242 av_log(avctx, AV_LOG_ERROR,
243 "XviD: Cannot write 2-pass pipe\n");
244 return -1;
245 }
246
247 if( avctx->stats_in == NULL ) {
248 av_log(avctx, AV_LOG_ERROR,
249 "XviD: No 2-pass information loaded for second pass\n");
250 return -1;
251 }
252
253 if( strlen(avctx->stats_in) >
254 write(fd, avctx->stats_in, strlen(avctx->stats_in)) ) {
255 close(fd);
256 av_log(avctx, AV_LOG_ERROR,
257 "XviD: Cannot write to 2-pass pipe\n");
258 return -1;
259 }
260
261 close(fd);
262 rc2pass2.filename = x->twopassfile;
263 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_2pass2;
264 plugins[xvid_enc_create.num_plugins].param = &rc2pass2;
265 xvid_enc_create.num_plugins++;
266 } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
267 /* Single Pass Bitrate Control! */
268 memset(&single, 0, sizeof(xvid_plugin_single_t));
269 single.version = XVID_VERSION;
270 single.bitrate = avctx->bit_rate;
271
272 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_single;
273 plugins[xvid_enc_create.num_plugins].param = &single;
274 xvid_enc_create.num_plugins++;
275 }
276
277 /* Luminance Masking */
278 if( 0.0 != avctx->lumi_masking ) {
279 plugins[xvid_enc_create.num_plugins].func = xvid_plugin_lumimasking;
280 plugins[xvid_enc_create.num_plugins].param = NULL;
281 xvid_enc_create.num_plugins++;
282 }
283
284 /* Frame Rate and Key Frames */
285 xvid_correct_framerate(avctx);
286 xvid_enc_create.fincr = avctx->time_base.num;
287 xvid_enc_create.fbase = avctx->time_base.den;
288 if( avctx->gop_size > 0 )
289 xvid_enc_create.max_key_interval = avctx->gop_size;
290 else
291 xvid_enc_create.max_key_interval = 240; /* XviD's best default */
292
293 /* Quants */
294 if( xvid_flags & CODEC_FLAG_QSCALE ) x->qscale = 1;
295 else x->qscale = 0;
296
297 xvid_enc_create.min_quant[0] = avctx->qmin;
298 xvid_enc_create.min_quant[1] = avctx->qmin;
299 xvid_enc_create.min_quant[2] = avctx->qmin;
300 xvid_enc_create.max_quant[0] = avctx->qmax;
301 xvid_enc_create.max_quant[1] = avctx->qmax;
302 xvid_enc_create.max_quant[2] = avctx->qmax;
303
304 /* Quant Matrices */
305 x->intra_matrix = x->inter_matrix = NULL;
306 if( avctx->mpeg_quant )
307 x->vol_flags |= XVID_VOL_MPEGQUANT;
308 if( (avctx->intra_matrix || avctx->inter_matrix) ) {
309 x->vol_flags |= XVID_VOL_MPEGQUANT;
310
311 if( avctx->intra_matrix ) {
312 intra = avctx->intra_matrix;
313 x->intra_matrix = av_malloc(sizeof(unsigned char) * 64);
314 } else
315 intra = NULL;
316 if( avctx->inter_matrix ) {
317 inter = avctx->inter_matrix;
318 x->inter_matrix = av_malloc(sizeof(unsigned char) * 64);
319 } else
320 inter = NULL;
321
322 for( i = 0; i < 64; i++ ) {
323 if( intra )
324 x->intra_matrix[i] = (unsigned char)intra[i];
325 if( inter )
326 x->inter_matrix[i] = (unsigned char)inter[i];
327 }
328 }
329
330 /* Misc Settings */
331 xvid_enc_create.frame_drop_ratio = 0;
332 xvid_enc_create.global = 0;
333 if( xvid_flags & CODEC_FLAG_CLOSED_GOP )
334 xvid_enc_create.global |= XVID_GLOBAL_CLOSED_GOP;
335
336 /* Determines which codec mode we are operating in */
337 avctx->extradata = NULL;
338 avctx->extradata_size = 0;
339 if( xvid_flags & CODEC_FLAG_GLOBAL_HEADER ) {
340 /* In this case, we are claiming to be MPEG4 */
341 x->quicktime_format = 1;
342 avctx->codec_id = CODEC_ID_MPEG4;
343 } else {
344 /* We are claiming to be XviD */
345 x->quicktime_format = 0;
346 avctx->codec_tag = ff_get_fourcc("xvid");
347 }
348
349 /* Bframes */
350 xvid_enc_create.max_bframes = avctx->max_b_frames;
351 xvid_enc_create.bquant_offset = avctx->b_quant_offset;
352 xvid_enc_create.bquant_ratio = 100 * avctx->b_quant_factor;
353 if( avctx->max_b_frames > 0 && !x->quicktime_format ) xvid_enc_create.global |= XVID_GLOBAL_PACKED;
354
355 /* Create encoder context */
356 xerr = xvid_encore(NULL, XVID_ENC_CREATE, &xvid_enc_create, NULL);
357 if( xerr ) {
358 av_log(avctx, AV_LOG_ERROR, "XviD: Could not create encoder reference\n");
359 return -1;
360 }
361
362 x->encoder_handle = xvid_enc_create.handle;
363 avctx->coded_frame = &x->encoded_picture;
364
365 return 0;
366 }
367
368 /**
369 * Encodes a single frame.
370 *
371 * @param avctx AVCodecContext pointer to context
372 * @param frame Pointer to encoded frame buffer
373 * @param buf_size Size of encoded frame buffer
374 * @param data Pointer to AVFrame of unencoded frame
375 * @return Returns 0 on success, -1 on failure
376 */
377 int ff_xvid_encode_frame(AVCodecContext *avctx,
378 unsigned char *frame, int buf_size, void *data) {
379 int xerr, i;
380 char *tmp;
381 xvid_context_t *x = avctx->priv_data;
382 AVFrame *picture = data;
383 AVFrame *p = &(x->encoded_picture);
384
385 xvid_enc_frame_t xvid_enc_frame;
386 xvid_enc_stats_t xvid_enc_stats;
387
388 /* Start setting up the frame */
389 memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
390 xvid_enc_frame.version = XVID_VERSION;
391 memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
392 xvid_enc_stats.version = XVID_VERSION;
393 *p = *picture;
394
395 /* Let XviD know where to put the frame. */
396 xvid_enc_frame.bitstream = frame;
397 xvid_enc_frame.length = buf_size;
398
399 /* Initialize input image fields */
400 if( avctx->pix_fmt != PIX_FMT_YUV420P ) {
401 av_log(avctx, AV_LOG_ERROR, "XviD: Color spaces other than 420p not supported\n");
402 return -1;
403 }
404
405 xvid_enc_frame.input.csp = XVID_CSP_PLANAR; /* YUV420P */
406
407 for( i = 0; i < 4; i++ ) {
408 xvid_enc_frame.input.plane[i] = picture->data[i];
409 xvid_enc_frame.input.stride[i] = picture->linesize[i];
410 }
411
412 /* Encoder Flags */
413 xvid_enc_frame.vop_flags = x->vop_flags;
414 xvid_enc_frame.vol_flags = x->vol_flags;
415 xvid_enc_frame.motion = x->me_flags;
416 xvid_enc_frame.type = XVID_TYPE_AUTO;
417
418 /* Quant Setting */
419 if( x->qscale ) xvid_enc_frame.quant = picture->quality / FF_QP2LAMBDA;
420 else xvid_enc_frame.quant = 0;
421
422 /* Matrices */
423 xvid_enc_frame.quant_intra_matrix = x->intra_matrix;
424 xvid_enc_frame.quant_inter_matrix = x->inter_matrix;
425
426 /* Encode */
427 xerr = xvid_encore(x->encoder_handle, XVID_ENC_ENCODE,
428 &xvid_enc_frame, &xvid_enc_stats);
429
430 /* Two-pass log buffer swapping */
431 avctx->stats_out = NULL;
432 if( x->twopassbuffer ) {
433 tmp = x->old_twopassbuffer;
434 x->old_twopassbuffer = x->twopassbuffer;
435 x->twopassbuffer = tmp;
436 x->twopassbuffer[0] = 0;
437 if( x->old_twopassbuffer[0] != 0 ) {
438 avctx->stats_out = x->old_twopassbuffer;
439 }
440 }
441
442 if( 0 <= xerr ) {
443 p->quality = xvid_enc_stats.quant * FF_QP2LAMBDA;
444 if( xvid_enc_stats.type == XVID_TYPE_PVOP )
445 p->pict_type = FF_P_TYPE;
446 else if( xvid_enc_stats.type == XVID_TYPE_BVOP )
447 p->pict_type = FF_B_TYPE;
448 else if( xvid_enc_stats.type == XVID_TYPE_SVOP )
449 p->pict_type = FF_S_TYPE;
450 else
451 p->pict_type = FF_I_TYPE;
452 if( xvid_enc_frame.out_flags & XVID_KEYFRAME ) {
453 p->key_frame = 1;
454 if( x->quicktime_format )
455 return xvid_strip_vol_header(avctx, frame,
456 xvid_enc_stats.hlength, xerr);
457 } else
458 p->key_frame = 0;
459
460 return xerr;
461 } else {
462 av_log(avctx, AV_LOG_ERROR, "XviD: Encoding Error Occurred: %i\n", xerr);
463 return -1;
464 }
465 }
466
467 /**
468 * Destroys the private context for the encoder.
469 * All buffers are freed, and the XviD encoder context is destroyed.
470 *
471 * @param avctx AVCodecContext pointer to context
472 * @return Returns 0, success guaranteed
473 */
474 int ff_xvid_encode_close(AVCodecContext *avctx) {
475 xvid_context_t *x = avctx->priv_data;
476
477 xvid_encore(x->encoder_handle, XVID_ENC_DESTROY, NULL, NULL);
478
479 if( avctx->extradata != NULL )
480 av_free(avctx->extradata);
481 if( x->twopassbuffer != NULL ) {
482 av_free(x->twopassbuffer);
483 av_free(x->old_twopassbuffer);
484 }
485 if( x->twopassfile != NULL )
486 av_free(x->twopassfile);
487 if( x->intra_matrix != NULL )
488 av_free(x->intra_matrix);
489 if( x->inter_matrix != NULL )
490 av_free(x->inter_matrix);
491
492 return 0;
493 }
494
495 /**
496 * Routine to create a global VO/VOL header for MP4 container.
497 * What we do here is extract the header from the XviD bitstream
498 * as it is encoded. We also strip the repeated headers from the
499 * bitstream when a global header is requested for MPEG-4 ISO
500 * compliance.
501 *
502 * @param avctx AVCodecContext pointer to context
503 * @param frame Pointer to encoded frame data
504 * @param header_len Length of header to search
505 * @param frame_len Length of encoded frame data
506 * @return Returns new length of frame data
507 */
508 int xvid_strip_vol_header(AVCodecContext *avctx,
509 unsigned char *frame,
510 unsigned int header_len,
511 unsigned int frame_len) {
512 int vo_len = 0, i;
513
514 for( i = 0; i < header_len - 3; i++ ) {
515 if( frame[i] == 0x00 &&
516 frame[i+1] == 0x00 &&
517 frame[i+2] == 0x01 &&
518 frame[i+3] == 0xB6 ) {
519 vo_len = i;
520 break;
521 }
522 }
523
524 if( vo_len > 0 ) {
525 /* We need to store the header, so extract it */
526 if( avctx->extradata == NULL ) {
527 avctx->extradata = av_malloc(vo_len);
528 memcpy(avctx->extradata, frame, vo_len);
529 avctx->extradata_size = vo_len;
530 }
531 /* Less dangerous now, memmove properly copies the two
532 chunks of overlapping data */
533 memmove(frame, &(frame[vo_len]), frame_len - vo_len);
534 return frame_len - vo_len;
535 } else
536 return frame_len;
537 }
538
539 /**
540 * Routine to correct a possibly erroneous framerate being fed to us.
541 * XviD currently chokes on framerates where the ticks per frame is
542 * extremely large. This function works to correct problems in this area
543 * by estimating a new framerate and taking the simpler fraction of
544 * the two presented.
545 *
546 * @param avctx Context that contains the framerate to correct.
547 */
548 void xvid_correct_framerate(AVCodecContext *avctx) {
549 int frate, fbase;
550 int est_frate, est_fbase;
551 int gcd;
552 float est_fps, fps;
553
554 frate = avctx->time_base.den;
555 fbase = avctx->time_base.num;
556
557 gcd = ff_gcd(frate, fbase);
558 if( gcd > 1 ) {
559 frate /= gcd;
560 fbase /= gcd;
561 }
562
563 if( frate <= 65000 && fbase <= 65000 ) {
564 avctx->time_base.den = frate;
565 avctx->time_base.num = fbase;
566 return;
567 }
568
569 fps = (float)frate / (float)fbase;
570 est_fps = roundf(fps * 1000.0) / 1000.0;
571
572 est_frate = (int)est_fps;
573 if( est_fps > (int)est_fps ) {
574 est_frate = (est_frate + 1) * 1000;
575 est_fbase = (int)roundf((float)est_frate / est_fps);
576 } else
577 est_fbase = 1;
578
579 gcd = ff_gcd(est_frate, est_fbase);
580 if( gcd > 1 ) {
581 est_frate /= gcd;
582 est_fbase /= gcd;
583 }
584
585 if( fbase > est_fbase ) {
586 avctx->time_base.den = est_frate;
587 avctx->time_base.num = est_fbase;
588 av_log(avctx, AV_LOG_DEBUG,
589 "XviD: framerate re-estimated: %.2f, %.3f%% correction\n",
590 est_fps, (((est_fps - fps)/fps) * 100.0));
591 } else {
592 avctx->time_base.den = frate;
593 avctx->time_base.num = fbase;
594 }
595 }
596
597 /*
598 * XviD 2-Pass Kludge Section
599 *
600 * XviD's default 2-pass doesn't allow us to create data as we need to, so
601 * this section spends time replacing the first pass plugin so we can write
602 * statistic information as libavcodec requests in. We have another kludge
603 * that allows us to pass data to the second pass in XviD without a custom
604 * rate-control plugin.
605 */
606
607 /**
608 * Initializes the two-pass plugin and context.
609 *
610 * @param param Input construction parameter structure
611 * @param handle Private context handle
612 * @return Returns XVID_ERR_xxxx on failure, or 0 on success.
613 */
614 static int xvid_ff_2pass_create(xvid_plg_create_t * param,
615 void ** handle) {
616 xvid_ff_pass1_t *x = (xvid_ff_pass1_t *)param->param;
617 char *log = x->context->twopassbuffer;
618
619 /* Do a quick bounds check */
620 if( log == NULL )
621 return XVID_ERR_FAIL;
622
623 /* We use snprintf() */
624 /* This is because we can safely prevent a buffer overflow */
625 log[0] = 0;
626 snprintf(log, BUFFER_REMAINING(log),
627 "# ffmpeg 2-pass log file, using xvid codec\n");
628 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
629 "# Do not modify. libxvidcore version: %d.%d.%d\n\n",
630 XVID_VERSION_MAJOR(XVID_VERSION),
631 XVID_VERSION_MINOR(XVID_VERSION),
632 XVID_VERSION_PATCH(XVID_VERSION));
633
634 *handle = x->context;
635 return 0;
636 }
637
638 /**
639 * Destroys the two-pass plugin context.
640 *
641 * @param ref Context pointer for the plugin
642 * @param param Destrooy context
643 * @return Returns 0, success guaranteed
644 */
645 static int xvid_ff_2pass_destroy(xvid_context_t *ref,
646 xvid_plg_destroy_t *param) {
647 /* Currently cannot think of anything to do on destruction */
648 /* Still, the framework should be here for reference/use */
649 if( ref->twopassbuffer != NULL )
650 ref->twopassbuffer[0] = 0;
651 return 0;
652 }
653
654 /**
655 * Enables fast encode mode during the first pass.
656 *
657 * @param ref Context pointer for the plugin
658 * @param param Frame data
659 * @return Returns 0, success guaranteed
660 */
661 static int xvid_ff_2pass_before(xvid_context_t *ref,
662 xvid_plg_data_t *param) {
663 int motion_remove;
664 int motion_replacements;
665 int vop_remove;
666
667 /* Nothing to do here, result is changed too much */
668 if( param->zone && param->zone->mode == XVID_ZONE_QUANT )
669 return 0;
670
671 /* We can implement a 'turbo' first pass mode here */
672 param->quant = 2;
673
674 /* Init values */
675 motion_remove = ~XVID_ME_CHROMA_PVOP &
676 ~XVID_ME_CHROMA_BVOP &
677 ~XVID_ME_EXTSEARCH16 &
678 ~XVID_ME_ADVANCEDDIAMOND16;
679 motion_replacements = XVID_ME_FAST_MODEINTERPOLATE |
680 XVID_ME_SKIP_DELTASEARCH |
681 XVID_ME_FASTREFINE16 |
682 XVID_ME_BFRAME_EARLYSTOP;
683 vop_remove = ~XVID_VOP_MODEDECISION_RD &
684 ~XVID_VOP_FAST_MODEDECISION_RD &
685 ~XVID_VOP_TRELLISQUANT &
686 ~XVID_VOP_INTER4V &
687 ~XVID_VOP_HQACPRED;
688
689 param->vol_flags &= ~XVID_VOL_GMC;
690 param->vop_flags &= vop_remove;
691 param->motion_flags &= motion_remove;
692 param->motion_flags |= motion_replacements;
693
694 return 0;
695 }
696
697 /**
698 * Captures statistic data and writes it during first pass.
699 *
700 * @param ref Context pointer for the plugin
701 * @param param Statistic data
702 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
703 */
704 static int xvid_ff_2pass_after(xvid_context_t *ref,
705 xvid_plg_data_t *param) {
706 char *log = ref->twopassbuffer;
707 char *frame_types = " ipbs";
708 char frame_type;
709
710 /* Quick bounds check */
711 if( log == NULL )
712 return XVID_ERR_FAIL;
713
714 /* Convert the type given to us into a character */
715 if( param->type < 5 && param->type > 0 ) {
716 frame_type = frame_types[param->type];
717 } else {
718 return XVID_ERR_FAIL;
719 }
720
721 snprintf(BUFFER_CAT(log), BUFFER_REMAINING(log),
722 "%c %d %d %d %d %d %d\n",
723 frame_type, param->stats.quant, param->stats.kblks, param->stats.mblks,
724 param->stats.ublks, param->stats.length, param->stats.hlength);
725
726 return 0;
727 }
728
729 /**
730 * Dispatch function for our custom plugin.
731 * This handles the dispatch for the XviD plugin. It passes data
732 * on to other functions for actual processing.
733 *
734 * @param ref Context pointer for the plugin
735 * @param cmd The task given for us to complete
736 * @param p1 First parameter (varies)
737 * @param p2 Second parameter (varies)
738 * @return Returns XVID_ERR_xxxx on failure, or 0 on success
739 */
740 int xvid_ff_2pass(void *ref, int cmd, void *p1, void *p2) {
741 switch( cmd ) {
742 case XVID_PLG_INFO:
743 case XVID_PLG_FRAME:
744 return 0;
745
746 case XVID_PLG_BEFORE:
747 return xvid_ff_2pass_before(ref, p1);
748
749 case XVID_PLG_CREATE:
750 return xvid_ff_2pass_create(p1, p2);
751
752 case XVID_PLG_AFTER:
753 return xvid_ff_2pass_after(ref, p1);
754
755 case XVID_PLG_DESTROY:
756 return xvid_ff_2pass_destroy(ref, p1);
757
758 default:
759 return XVID_ERR_FAIL;
760 }
761 }
762
763 /**
764 * XviD codec definition for libavcodec.
765 */
766 AVCodec xvid_encoder = {
767 "xvid",
768 CODEC_TYPE_VIDEO,
769 CODEC_ID_XVID,
770 sizeof(xvid_context_t),
771 ff_xvid_encode_init,
772 ff_xvid_encode_frame,
773 ff_xvid_encode_close
774 };
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