aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpcodecs/ve_xvid.c
blob: d2979dddb2e05fad6e8bed54d2ca0aa6d434ffe3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <time.h>

#if !defined(INFINITY) && defined(HUGE_VAL)
#define INFINITY HUGE_VAL
#endif

#include "../config.h"
#include "../mp_msg.h"

#ifdef HAVE_XVID3

#include "codec-cfg.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"

#include "muxer.h"

#include "img_format.h"
#include "mp_image.h"
#include "vf.h"

#include <xvid.h>
#include "xvid_vbr.h"

#include "m_option.h"


#ifdef XVID_API_UNSTABLE
#warning *******************************************************************
#warning **                                                               **
#warning **  Y O U '' R E   U S I N G   U N S T A B L E   S O F T W A R E  **
#warning **                                                               **
#warning ** Streams produced by this version aren''t probably compatible   **
#warning ** with anything else, even the xvid decoder itself. There are   **
#warning ** bugs, this code could crash, could blow up your PC or the     **
#warning ** whole building !                                              **
#warning ** If you want stable code and compatible streams, use stable    **
#warning ** XViD releases (currently 0.9.x).                              **
#warning **                                                               **
#warning *******************************************************************
#endif

/**********************************************************************/
/* motion estimation quality presets */
static int const motion_presets[7] = {
#ifdef XVID_API_UNSTABLE
	0,
	0,
	0,
	0,
	PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8,
	PMV_HALFPELREFINE16 | PMV_HALFPELDIAMOND8 | PMV_ADVANCEDDIAMOND16,
	PMV_HALFPELREFINE16 | PMV_EXTSEARCH16 |	PMV_HALFPELREFINE8 | PMV_HALFPELDIAMOND8 | PMV_USESQUARES16
#else
        0,
	PMV_QUICKSTOP16,
	PMV_EARLYSTOP16,
	PMV_EARLYSTOP16 | PMV_EARLYSTOP8,
        PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EARLYSTOP8 | PMV_HALFPELDIAMOND8,
        PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EARLYSTOP8 | PMV_HALFPELDIAMOND8 | PMV_ADVANCEDDIAMOND16,
	PMV_EARLYSTOP16 | PMV_HALFPELREFINE16 | PMV_EXTSEARCH16 | PMV_EARLYSTOP8 | PMV_HALFPELREFINE8 | 
	PMV_HALFPELDIAMOND8 | PMV_USESQUARES16

#endif
};

extern char* passtmpfile;

static int xvidenc_pass = 0;
static int xvidenc_quality = 6;
static int xvidenc_4mv = 0;
static int xvidenc_bitrate = -1;
static int xvidenc_rc_reaction_delay_factor = -1;
static int xvidenc_rc_averaging_period = -1;
static int xvidenc_rc_buffer = -1;
static char* xvidenc_quant_range = "2-31/2-31";
static int xvidenc_min_key_interval = -1;
static int xvidenc_max_key_interval = -1;
static int xvidenc_mpeg_quant = 0;
static int xvidenc_mod_quant = 0;
static int xvidenc_keyframe_boost = -1;
static int xvidenc_kfthreshold = -1;
static int xvidenc_kfreduction = -1;
static int xvidenc_fixed_quant = 0;
static int xvidenc_debug = 0;
static int xvidenc_interlacing = 0;
static int xvidenc_greyscale = 0;
#ifdef XVID_API_UNSTABLE
static int xvidenc_packed = 0;
static int xvidenc_divx5bvop = 1;
static int xvidenc_lumi_mask = 0;
static int xvidenc_qpel = 0;
static int xvidenc_max_bframes = 0;
static int xvidenc_bquant_ratio = 150;
static int xvidenc_bquant_offset = 100;
static int xvidenc_bf_threshold = 0;
static int xvidenc_gmc = 0;
static int xvidenc_chroma_me = 0;
static int xvidenc_chroma_opt = 0;
static int xvidenc_reduced = 0;
static int xvidenc_hqac = 0;
static int xvidenc_vhq = 0;
static int xvidenc_psnr = 0;
static uint64_t xvid_error[3];
#endif

m_option_t xvidencopts_conf[] = {
    { "pass", &xvidenc_pass, CONF_TYPE_INT, CONF_RANGE, 0, 2, NULL},
    { "me_quality", &xvidenc_quality, CONF_TYPE_INT, CONF_RANGE, 0,
      sizeof(motion_presets) / sizeof(motion_presets[0]) - 1, NULL},
    { "4mv", &xvidenc_4mv, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "bitrate", &xvidenc_bitrate, CONF_TYPE_INT, CONF_RANGE, 4, 24000000, NULL},
    { "rc_reaction_delay_factor", &xvidenc_rc_reaction_delay_factor, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "rc_averaging_period", &xvidenc_rc_averaging_period, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "rc_buffer", &xvidenc_rc_buffer, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "quant_range", &xvidenc_quant_range, CONF_TYPE_STRING, 0, 0, 0, NULL},
    { "min_key_interval", &xvidenc_min_key_interval, CONF_TYPE_INT, 0, 0, 0, NULL}, /* for XVID_MODE_2PASS_2 */
    { "max_key_interval", &xvidenc_max_key_interval, CONF_TYPE_INT, 0, 0, 0, NULL},
    { "mpeg_quant", &xvidenc_mpeg_quant, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "mod_quant", &xvidenc_mod_quant, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "keyframe_boost", &xvidenc_keyframe_boost, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL}, /* for XVID_MODE_2PASS_2 */
    { "kfthreshold", &xvidenc_kfthreshold, CONF_TYPE_INT, 0, 0, 0, NULL}, /* for XVID_MODE_2PASS_2 */
    { "kfreduction", &xvidenc_kfreduction, CONF_TYPE_INT, CONF_RANGE, 0, 100, NULL}, /* for XVID_MODE_2PASS_2 */
    { "fixed_quant", &xvidenc_fixed_quant, CONF_TYPE_INT, CONF_RANGE, 1, 31, NULL}, /* for XVID_MODE_FIXED_QUANT */
    { "debug", &xvidenc_debug, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "interlacing", &xvidenc_interlacing, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "greyscale", &xvidenc_greyscale, CONF_TYPE_FLAG, 0, 0, 1, NULL},
#ifdef XVID_API_UNSTABLE
    { "packed", &xvidenc_packed, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "divx5bvop", &xvidenc_divx5bvop, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    //{ "lumi_mask", &xvidenc_lumi_mask, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "psnr", &xvidenc_psnr, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "qpel", &xvidenc_qpel, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "max_bframes", &xvidenc_max_bframes, CONF_TYPE_INT, CONF_RANGE, 0, 4, NULL},
    { "bquant_ratio", &xvidenc_bquant_ratio, CONF_TYPE_INT, CONF_RANGE, 0, 1000, NULL},
    { "bquant_offset", &xvidenc_bquant_offset, CONF_TYPE_INT, CONF_RANGE, -1000, 1000, NULL},
    { "bf_threshold", &xvidenc_bf_threshold, CONF_TYPE_INT, CONF_RANGE, -255, 255, NULL},
    { "reduced", &xvidenc_reduced, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "gmc", &xvidenc_gmc, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "chroma_me", &xvidenc_chroma_me, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "hq_ac", &xvidenc_hqac, CONF_TYPE_FLAG, 0, 0, 1, NULL},
    { "vhq", &xvidenc_vhq, CONF_TYPE_INT, CONF_RANGE, 0, 4, NULL},
    { "chroma_opt", &xvidenc_chroma_opt, CONF_TYPE_FLAG, 0, 0, 1, NULL},
#endif
    { NULL, NULL, 0, 0, 0, 0, NULL}
};

struct vf_priv_s {
    muxer_stream_t* mux;
    XVID_ENC_FRAME enc_frame;
    void* enc_handle;
    vbr_control_t vbr_state;
    int pixels;
    int nb_frames;
};

static int
config(struct vf_instance_s* vf,
       int width, int height, int d_width, int d_height,
       unsigned int flags, unsigned int outfmt)
{
    XVID_ENC_PARAM enc_param;
    struct vf_priv_s *fp = vf->priv;
    unsigned int min_iq, max_iq, min_pq, max_pq;

    fp->mux->bih->biWidth = width;
    fp->mux->bih->biHeight = height;
    fp->mux->bih->biSizeImage = fp->mux->bih->biWidth * fp->mux->bih->biHeight * 3;
    fp->mux->aspect = (float)d_width/d_height;
    mp_msg(MSGT_MENCODER,MSGL_INFO,"videocodec: XViD (%dx%d fourcc=%x [%.4s])\n",
	width, height, fp->mux->bih->biCompression, (char *)&fp->mux->bih->biCompression);

    // {min,max}_{i,p}quantizer parsing & validation
    if (sscanf (xvidenc_quant_range, "%u-%u/%u-%u", &min_iq, &max_iq, &min_pq, &max_pq) < 4) {
	mp_msg (MSGT_MENCODER, MSGL_ERR, 
		"xvid: ERROR: cannot parse \"quant_range=%s\"\n", xvidenc_quant_range);
	return 0;
    }
    if (min_iq < 1 || min_iq > 31 || max_iq < 1 || max_iq > 31 || min_iq > max_iq ||
	min_pq < 1 || min_pq > 31 || max_pq < 1 || max_pq > 31 || min_pq > max_pq) {
	mp_msg (MSGT_MENCODER, MSGL_ERR,
		"xvid: ERROR: {min,max} {I,P} quantizer must be in [1,31] and min must be <= max.\n");
	mp_msg (MSGT_MENCODER, MSGL_ERR,
		"xvid: ERROR: cannot use \"quant_range=%s\"\n", xvidenc_quant_range);
	return -1;
    }

#ifdef XVID_API_UNSTABLE
    mp_msg (MSGT_MENCODER, MSGL_WARN,
	    "\n"
	    "*******************************************************************\n"
	    "**                                                               **\n"
	    "**  Y O U ' R E   U S I N G   U N S T A B L E   S O F T W A R E  **\n"
	    "**                                                               **\n"
	    "** Streams produced by this version aren't probably compatible   **\n"
	    "** with anything else, even the xvid decoder itself. There are   **\n"
	    "** bugs, this code could crash, could blow up your PC or the     **\n"
	    "** whole building !                                              **\n"
	    "** If you want stable code and compatible streams, use stable    **\n"
	    "** XViD releases (currently 0.9.x).                              **\n"
	    "**                                                               **\n"
	    "*******************************************************************\n"
	    "\n");
#endif

    // initialize XViD core parameters
    // ===============================
    memset(&enc_param, 0, sizeof(enc_param));
    enc_param.width = width;
    enc_param.height = height;
    enc_param.fincr = fp->mux->h.dwScale;
    enc_param.fbase = fp->mux->h.dwRate;
    if (xvidenc_bitrate > 16000)
	enc_param.rc_bitrate = xvidenc_bitrate;
    else if (xvidenc_bitrate > 0)
	enc_param.rc_bitrate = xvidenc_bitrate * 1000;
    else
	enc_param.rc_bitrate = -1;
#ifdef XVID_API_UNSTABLE
    if (xvidenc_max_bframes >= 1 && xvidenc_pass >= 1) {
	mp_msg(MSGT_MENCODER,MSGL_WARN, "xvid: cannot use bframes with 2-pass, disabling bframes\n");
	xvidenc_max_bframes = 0;
    }
    enc_param.max_bframes = xvidenc_max_bframes;
    enc_param.bquant_ratio = xvidenc_bquant_ratio;
    enc_param.bquant_offset = xvidenc_bquant_offset;
    if (xvidenc_divx5bvop) 
	enc_param.global |= XVID_GLOBAL_DX50BVOP;
    if (xvidenc_packed) 
	enc_param.global |= XVID_GLOBAL_PACKED;
    if (xvidenc_reduced)
	enc_param.global |= XVID_GLOBAL_REDUCED;
    if (xvidenc_psnr) {
	enc_param.global |= XVID_GLOBAL_EXTRASTATS;
	fp->pixels = width * height;
	fp->nb_frames = 0;
	xvid_error[0] = xvid_error[1] = xvid_error[2] = 0;
    }
    if (xvidenc_greyscale)
	enc_param.global |= XVID_GREYSCALE;
#endif
    enc_param.rc_reaction_delay_factor = xvidenc_rc_reaction_delay_factor;
    enc_param.rc_averaging_period = xvidenc_rc_averaging_period;
    enc_param.rc_buffer = xvidenc_rc_buffer;
    enc_param.min_quantizer = min_iq;
    enc_param.max_quantizer = max_iq;
    if( xvidenc_max_key_interval <= 0 )
	xvidenc_max_key_interval = 10 * enc_param.fbase / enc_param.fincr;
    enc_param.max_key_interval = xvidenc_max_key_interval;
    switch (xvid_encore(NULL, XVID_ENC_CREATE, &enc_param, NULL)) {
    case XVID_ERR_FAIL:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed\n");
	return 0;
    case XVID_ERR_MEMORY:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed, out of memory\n");
	return 0;
    case XVID_ERR_FORMAT:
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: encoder creation failed, bad format\n");
	return 0;
    }
    fp->enc_handle = enc_param.handle;

    // initialize XViD per-frame static parameters
    // ===========================================
    fp->enc_frame.motion = motion_presets[xvidenc_quality];
    fp->enc_frame.general = XVID_HALFPEL | (xvidenc_mpeg_quant ? XVID_MPEGQUANT : XVID_H263QUANT);
    if (xvidenc_4mv)
	fp->enc_frame.general |= XVID_INTER4V;
    if (xvidenc_interlacing)
	fp->enc_frame.general |= XVID_INTERLACING;
#ifdef XVID_API_UNSTABLE
    fp->enc_frame.bframe_threshold = xvidenc_bf_threshold;
    if (xvidenc_lumi_mask)
	fp->enc_frame.general |= XVID_LUMIMASKING;
    if (xvidenc_qpel) {
	fp->enc_frame.general |= XVID_QUARTERPEL;
	fp->enc_frame.motion |= PMV_QUARTERPELREFINE16 | PMV_QUARTERPELREFINE8;
    }
    switch (xvidenc_vhq) {
    case 4: // wide search
	fp->enc_frame.motion |= EXTSEARCH_BITS | PMV_EXTSEARCH8;
    case 3: // medium search
	fp->enc_frame.motion |= HALFPELREFINE8_BITS | QUARTERPELREFINE8_BITS | CHECKPREDICTION_BITS;
    case 2: // limited search
	fp->enc_frame.motion |= HALFPELREFINE16_BITS | QUARTERPELREFINE16_BITS;
    case 1: // mode decision
	fp->enc_frame.general |= XVID_MODEDECISION_BITS;
	break;
    case 0: // off
	break;
    }
    if (xvidenc_gmc)
	fp->enc_frame.general |= XVID_GMC;
    if (xvidenc_psnr)
	fp->enc_frame.general |= XVID_EXTRASTATS;
    if (xvidenc_chroma_me)
	fp->enc_frame.motion |= PMV_CHROMA16 | PMV_CHROMA8;
    if(xvidenc_reduced)
	fp->enc_frame.general |= XVID_REDUCED;
    if(xvidenc_hqac)
	fp->enc_frame.general |= XVID_HQACPRED;
    if (xvidenc_chroma_opt)
	fp->enc_frame.general |= XVID_CHROMAOPT;
#else
    if (xvidenc_greyscale)
	fp->enc_frame.general |= XVID_GREYSCALE;
#endif

    switch (outfmt) {
    case IMGFMT_YV12:
	fp->enc_frame.colorspace = XVID_CSP_YV12;
	break;
    case IMGFMT_IYUV: case IMGFMT_I420:
	fp->enc_frame.colorspace = XVID_CSP_I420;
	break;
    case IMGFMT_YUY2:
	fp->enc_frame.colorspace = XVID_CSP_YUY2;
	break;
    case IMGFMT_UYVY:
	fp->enc_frame.colorspace = XVID_CSP_UYVY;
	break;
    case IMGFMT_RGB24: case IMGFMT_BGR24:
    	fp->enc_frame.colorspace = XVID_CSP_RGB24;
	break;
    default:
	mp_msg(MSGT_MENCODER,MSGL_ERR,"xvid: unsupported picture format (%s)!\n",
	       vo_format_name(outfmt));
	return 0;
    }
    fp->enc_frame.quant_intra_matrix = 0;
    fp->enc_frame.quant_inter_matrix = 0;

    // initialize VBR engine
    // =====================
    vbrSetDefaults(&fp->vbr_state);
    if (xvidenc_min_key_interval < 0)
	xvidenc_min_key_interval = fp->vbr_state.min_key_interval;

    // pass
    if (xvidenc_pass == 0) {
	if (xvidenc_fixed_quant >= 1) {
	    fp->vbr_state.mode = VBR_MODE_FIXED_QUANT;
	    fp->vbr_state.fixed_quant = xvidenc_fixed_quant;
	} else
	    fp->vbr_state.mode = VBR_MODE_1PASS;
    }
    else if (xvidenc_pass == 1)
	fp->vbr_state.mode = VBR_MODE_2PASS_1;
    else if (xvidenc_pass == 2)
	fp->vbr_state.mode = VBR_MODE_2PASS_2;
    else
	return -1;

    // misc
    fp->vbr_state.fps = (double)enc_param.fbase / enc_param.fincr;
    fp->vbr_state.filename = passtmpfile;
    fp->vbr_state.desired_bitrate = enc_param.rc_bitrate;
    fp->vbr_state.min_iquant = min_iq;
    fp->vbr_state.max_iquant = max_iq;
    fp->vbr_state.min_pquant = min_pq;
    fp->vbr_state.max_pquant = max_pq;
    if (xvidenc_keyframe_boost >= 0)
	fp->vbr_state.keyframe_boost = xvidenc_keyframe_boost;
    if (xvidenc_kfthreshold >= 0)
	fp->vbr_state.kftreshold = xvidenc_kfthreshold;
    if (xvidenc_kfreduction >= 0)
	fp->vbr_state.kfreduction = xvidenc_kfreduction;
    if (xvidenc_min_key_interval >= 0)
	fp->vbr_state.min_key_interval = xvidenc_min_key_interval;
    fp->vbr_state.max_key_interval = enc_param.max_key_interval;
    fp->vbr_state.debug = xvidenc_debug;

    vbrInit(&fp->vbr_state);

    return 1;
}

#ifdef XVID_API_UNSTABLE
static double
sse_to_PSNR(double sse, double pixels)
{
    return sse == 0 ? INFINITY : 4.34294481903251827652 * (11.08252709031685229249 - log(sse/pixels));
    // 4.34294481903251827652 = 10/log(10)
    // 11.08252709031685229249 = log(255*255)
}
#endif

static void
uninit(struct vf_instance_s* vf)
{
    struct vf_priv_s *fp = vf->priv;

#ifdef XVID_API_UNSTABLE
    if (xvidenc_psnr) {
	double p = (double)fp->pixels * (double)fp->nb_frames;
        printf ("PSNR: Y:%2.2f, Cb:%2.2f, Cr:%2.2f, All:%2.2f\n", 
		sse_to_PSNR(xvid_error[0], p), 
		sse_to_PSNR(xvid_error[1], p/4), 
		sse_to_PSNR(xvid_error[2], p/4), 
		sse_to_PSNR(xvid_error[0] + xvid_error[1] + xvid_error[2], p*1.5));
    }
#endif
    vbrFinish(&fp->vbr_state);
}

static int
control(struct vf_instance_s* vf, int request, void* data)
{
    return CONTROL_UNKNOWN;
}

static int
query_format(struct vf_instance_s* vf, unsigned int fmt)
{
    switch(fmt){
    case IMGFMT_YV12: case IMGFMT_IYUV: case IMGFMT_I420:
	return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW;
    case IMGFMT_YUY2: case IMGFMT_UYVY:
	return VFCAP_CSP_SUPPORTED;
    case IMGFMT_RGB24: case IMGFMT_BGR24:
	return VFCAP_CSP_SUPPORTED | VFCAP_FLIPPED;
    }
    return 0;
}

static int
put_image(struct vf_instance_s* vf, mp_image_t *mpi)
{
    XVID_ENC_STATS enc_stats;
    struct vf_priv_s *fp = vf->priv;

    fp->enc_frame.bitstream = fp->mux->buffer;
    fp->enc_frame.length = -1 /* fp->mux->buffer_size */;
    fp->enc_frame.image = mpi->planes[0];
#ifdef XVID_API_UNSTABLE
    fp->enc_frame.stride = mpi->stride[0];
#endif

    // get quantizers & I/P decision from the VBR engine
#ifdef XVID_API_UNSTABLE
    if (xvidenc_max_bframes >= 1) {
	if (xvidenc_fixed_quant!=0) {
	    // hack, the internal VBR engine isn't fixed-quant aware
	    fp->enc_frame.quant = xvidenc_fixed_quant;
	    fp->enc_frame.intra = -1;
	    fp->enc_frame.bquant = (xvidenc_fixed_quant * xvidenc_bquant_ratio + xvidenc_bquant_offset) / 100;
	} else
	    // use the internal VBR engine since the external one isn't bframe aware
	    fp->enc_frame.quant =0;
	    fp->enc_frame.intra =-1;
	    fp->enc_frame.bquant = 0;
    } else {
	fp->enc_frame.quant = vbrGetQuant(&fp->vbr_state);
	fp->enc_frame.intra = vbrGetIntra(&fp->vbr_state);
    }
#else
    fp->enc_frame.quant = vbrGetQuant(&fp->vbr_state);
    fp->enc_frame.intra = vbrGetIntra(&fp->vbr_state);
#endif

    // modulated quantizer type
    if (xvidenc_mod_quant && xvidenc_pass == 2) {
	fp->enc_frame.general |= (fp->enc_frame.quant < 4) ? XVID_MPEGQUANT : XVID_H263QUANT;
	fp->enc_frame.general &= (fp->enc_frame.quant < 4) ? ~XVID_H263QUANT : ~XVID_MPEGQUANT;
    }

    // encode frame
    switch (xvid_encore(fp->enc_handle, XVID_ENC_ENCODE, &fp->enc_frame, &enc_stats)) {
    case XVID_ERR_OK:
	break;
    case XVID_ERR_MEMORY:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: out of memory\n");
	break;
    case XVID_ERR_FORMAT:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: bad format\n");
	break;
    default:
	mp_msg(MSGT_MENCODER, MSGL_ERR, "xvid: failure\n");
	break;
    }

#ifdef XVID_API_UNSTABLE
    if (xvidenc_psnr) {
        static FILE *fvstats = NULL;
        char filename[20];

        if (!fvstats) {
            time_t today2;
            struct tm *today;
            today2 = time (NULL);
            today = localtime (&today2);
            sprintf (filename, "psnr_%02d%02d%02d.log", today->tm_hour, today->tm_min, today->tm_sec);
            fvstats = fopen (filename,"w");
            if (!fvstats) {
                perror ("fopen");
                xvidenc_psnr = 0; // disable block
            }
        }

	xvid_error[0] += enc_stats.sse_y;
	xvid_error[1] += enc_stats.sse_u;
	xvid_error[2] += enc_stats.sse_v;

        fprintf (fvstats, "%6d, %2d, %6d, %2.2f, %2.2f, %2.2f, %2.2f %c\n",
		 fp->nb_frames,
		 enc_stats.quant,
		 fp->enc_frame.length,
		 sse_to_PSNR (enc_stats.sse_y, fp->pixels),
		 sse_to_PSNR (enc_stats.sse_u, fp->pixels / 4),
		 sse_to_PSNR (enc_stats.sse_v, fp->pixels / 4),
		 sse_to_PSNR (enc_stats.sse_y + enc_stats.sse_u + enc_stats.sse_v, (double)fp->pixels * 1.5),
		 fp->enc_frame.intra == 0 ? 'P' : fp->enc_frame.intra == 1 ? 'I' : 'B'
		 );

	fp->nb_frames++;
    }
#endif
    
    // write output
    muxer_write_chunk(fp->mux, fp->enc_frame.length, fp->enc_frame.intra==1 ? 0x10 : 0);

    // update the VBR engine
    vbrUpdate(&fp->vbr_state, enc_stats.quant, fp->enc_frame.intra,
	      enc_stats.hlength, fp->enc_frame.length, enc_stats.kblks, enc_stats.mblks, enc_stats.ublks);

    return 1;
}

//===========================================================================//

static int
vf_open(vf_instance_t *vf, char* args)
{
    XVID_INIT_PARAM params = { 0, 0, 0};
    vf->config = config;
    vf->default_caps = VFCAP_CONSTANT;
    vf->control = control;
    vf->uninit = uninit;
    vf->query_format = query_format;
    vf->put_image = put_image;
    vf->priv = malloc(sizeof(struct vf_priv_s));
    memset(vf->priv, 0, sizeof(struct vf_priv_s));
    vf->priv->mux = (muxer_stream_t*)args;

    vf->priv->mux->bih = calloc(1, sizeof(BITMAPINFOHEADER));
    vf->priv->mux->bih->biSize = sizeof(BITMAPINFOHEADER);
    vf->priv->mux->bih->biWidth = 0;
    vf->priv->mux->bih->biHeight = 0;
    vf->priv->mux->bih->biPlanes = 1;
    vf->priv->mux->bih->biBitCount = 24;
    vf->priv->mux->bih->biCompression = mmioFOURCC('X','V','I','D');

    if (xvid_init(NULL, 0, &params, NULL) != XVID_ERR_OK) {
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: initialisation failure\n");
	abort();
    }
    if (params.api_version != API_VERSION) {
	mp_msg(MSGT_MENCODER,MSGL_ERR, "xvid: XviD library API version mismatch\n"
		"\texpected %d.%d, got %d.%d, you should recompile MPlayer.\n",
		API_VERSION >> 16, API_VERSION & 0xff,
		params.api_version >> 16, params.api_version & 0xff);
	abort();
    }

    return 1;
}

vf_info_t ve_info_xvid = {
    "XviD encoder",
    "xvid",
    "Kim Minh Kaplan & Rémi Guyomarch",
    "for internal use by mencoder",
    vf_open
};

//===========================================================================//
#endif