aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpdemux/muxer_avi.c
blob: 493d07f03236db5be50a13ad3f0019de86abfde4 (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
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <unistd.h>
#include <limits.h>

#include "config.h"
#include "version.h"

#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"

#include "muxer.h"
#include "aviheader.h"
#include "ms_hdr.h"
#include "mp_msg.h"
#include "help_mp.h"

extern char *info_name;
extern char *info_artist;
extern char *info_genre;
extern char *info_subject;
extern char *info_copyright;
extern char *info_sourceform;
extern char *info_comment;

/* #define ODML_CHUNKLEN    0x02000000 */ /* for testing purposes */
#define ODML_CHUNKLEN    0x40000000
#define ODML_NOTKEYFRAME 0x80000000U
#define MOVIALIGN        0x00001000

float avi_aspect_override = -1.0;
int write_odml = 1;

struct avi_odmlidx_entry {
	uint64_t ofs;
	uint32_t len;
	uint32_t flags;
};

struct avi_odmlsuperidx_entry {
	uint64_t ofs;
	uint32_t len;
	uint32_t duration;
};

struct avi_stream_info {
	int idxsize;
	int idxpos;
	int superidxpos;
	int superidxsize;
	int riffofspos;
	int riffofssize;
	off_t *riffofs;
	struct avi_odmlidx_entry *idx;
	struct avi_odmlsuperidx_entry *superidx;
};

static unsigned int avi_aspect(muxer_stream_t *vstream)
{
    int x,y;
    float aspect = vstream->aspect;

    if (avi_aspect_override > 0.0) {
        aspect = avi_aspect_override;
    }

    if (aspect <= 0.0) return 0;

    if (aspect > 15.99/9.0 && aspect < 16.01/9.0) {
        return MAKE_AVI_ASPECT(16, 9);
    }
    if (aspect > 3.99/3.0 && aspect < 4.01/3.0) {
        return MAKE_AVI_ASPECT(4, 3);
    }

    if (aspect >= 1.0) {
        x = 16384;
        y = (float)x / aspect;
    } else {
        y = 16384;
        x = (float)y * aspect;
    }

    return MAKE_AVI_ASPECT(x, y);
}

static muxer_stream_t* avifile_new_stream(muxer_t *muxer,int type){
    struct avi_stream_info *si;
    muxer_stream_t* s;
    if (!muxer) return NULL;
    if(muxer->avih.dwStreams>=MUXER_MAX_STREAMS){
	mp_msg(MSGT_MUXER, MSGL_ERR, "Too many streams! increase MUXER_MAX_STREAMS !\n");
	return NULL;
    }
    s=malloc(sizeof(muxer_stream_t));
    memset(s,0,sizeof(muxer_stream_t));
    if(!s) return NULL; // no mem!?
    muxer->streams[muxer->avih.dwStreams]=s;
    s->type=type;
    s->id=muxer->avih.dwStreams;
    s->timer=0.0;
    s->size=0;
    s->muxer=muxer;
    s->priv=si=malloc(sizeof(struct avi_stream_info));
    memset(si,0,sizeof(struct avi_stream_info));
    si->idxsize=256;
    si->idx=calloc(si->idxsize, sizeof(struct avi_odmlidx_entry));
    si->riffofssize=16;
    si->riffofs=calloc((si->riffofssize+1), sizeof(off_t));
    memset(si->riffofs, 0, sizeof(off_t)*si->riffofssize);

    switch(type){
    case MUXER_TYPE_VIDEO:
      s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'d','c');
      s->h.fccType=streamtypeVIDEO;
      if(!muxer->def_v) muxer->def_v=s;
      break;
    case MUXER_TYPE_AUDIO:
      s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'w','b');
      s->h.fccType=streamtypeAUDIO;
      break;
    default:
      mp_msg(MSGT_MUXER, MSGL_WARN, "Warning! unknown stream type: %d\n",type);
      return NULL;
    }
    muxer->avih.dwStreams++;
    return s;
}

static void write_avi_chunk(stream_t *stream,unsigned int id,int len,void* data){
 int le_len = le2me_32(len);
 int le_id = le2me_32(id);
 stream_write_buffer(stream, &le_id, 4);
 stream_write_buffer(stream, &le_len, 4);

if(len>0){
  if(data){
    // DATA
    stream_write_buffer(stream, data, len);
    if(len&1){  // padding
      unsigned char zerobyte=0;
      stream_write_buffer(stream, &zerobyte, 1);
    }
  } else {
    // JUNK
    char *avi_junk_data="[= MPlayer junk data! =]";
    if(len&1) ++len; // padding
    while(len>0){
      int l=strlen(avi_junk_data);
      if(l>len) l=len;
      stream_write_buffer(stream, avi_junk_data, l);
      len-=l;
    }
  }
}
}

static void write_avi_list(stream_t *s,unsigned int id,int len);
static void avifile_write_standard_index(muxer_t *muxer);

static void avifile_odml_new_riff(muxer_t *muxer)
{
    struct avi_stream_info *vsi = muxer->def_v->priv;
    uint32_t riff[3];

    mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: Starting new RIFF chunk at %dMB.\n", (int)(muxer->file_end/1024/1024));

    vsi->riffofspos++;
    if (vsi->riffofspos>=vsi->riffofssize) {
        vsi->riffofssize+=16;
        vsi->riffofs=realloc_struct(vsi->riffofs,(vsi->riffofssize+1),sizeof(off_t));
    }
    vsi->riffofs[vsi->riffofspos] = stream_tell(muxer->stream);

    /* RIFF/AVIX chunk */
    riff[0]=le2me_32(mmioFOURCC('R','I','F','F'));
    riff[1]=0;
    riff[2]=le2me_32(mmioFOURCC('A','V','I','X'));
    stream_write_buffer(muxer->stream, riff, 12);

    write_avi_list(muxer->stream,listtypeAVIMOVIE,0);

    muxer->file_end = stream_tell(muxer->stream);
}

static void avifile_write_header(muxer_t *muxer);

static void avifile_write_chunk(muxer_stream_t *s,size_t len,unsigned int flags, double dts, double pts){
    off_t rifflen;
    muxer_t *muxer=s->muxer;
    struct avi_stream_info *si = s->priv;
    struct avi_stream_info *vsi = muxer->def_v->priv;
    int paddedlen = len + (len&1);

    if (s->type == MUXER_TYPE_VIDEO && !s->h.dwSuggestedBufferSize) {
	off_t pos=stream_tell(muxer->stream);
	stream_seek(muxer->stream, 0);
	avifile_write_header(muxer);
	stream_seek(muxer->stream, pos);
    }
  if(index_mode){
    rifflen = muxer->file_end - vsi->riffofs[vsi->riffofspos] - 8;
    if (vsi->riffofspos == 0) {
	rifflen += 8+muxer->idx_pos*sizeof(AVIINDEXENTRY);
    }
    if (rifflen + paddedlen > ODML_CHUNKLEN && write_odml == 1) {
	if (vsi->riffofspos == 0) {
            avifile_write_standard_index(muxer);
	}
	avifile_odml_new_riff(muxer);
    }

    if (vsi->riffofspos == 0) {
        // add to the traditional index:
        if(muxer->idx_pos>=muxer->idx_size){
            muxer->idx_size+=256; // 4kB
            muxer->idx=realloc_struct(muxer->idx,muxer->idx_size,16);
        }
        muxer->idx[muxer->idx_pos].ckid=s->ckid;
        muxer->idx[muxer->idx_pos].dwFlags=flags; // keyframe?
        muxer->idx[muxer->idx_pos].dwChunkOffset=muxer->file_end-(muxer->movi_start-4);
        muxer->idx[muxer->idx_pos].dwChunkLength=len;
        ++muxer->idx_pos;
    }

    // add to odml index
    if(si->idxpos>=si->idxsize){
	si->idxsize+=256;
	si->idx=realloc_struct(si->idx,si->idxsize,sizeof(*si->idx));
    }
    si->idx[si->idxpos].flags=(flags&AVIIF_KEYFRAME)?0:ODML_NOTKEYFRAME;
    si->idx[si->idxpos].ofs=muxer->file_end;
    si->idx[si->idxpos].len=len;
    ++si->idxpos;
  }
    // write out the chunk:
    write_avi_chunk(muxer->stream,s->ckid,len,s->buffer); /* unsigned char */

    if (len > s->h.dwSuggestedBufferSize){
	s->h.dwSuggestedBufferSize = len;
    }
    if((unsigned int)len>s->h.dwSuggestedBufferSize) s->h.dwSuggestedBufferSize=len;

    muxer->file_end += 8 + paddedlen;
}

static void write_avi_list(stream_t *stream,unsigned int id,int len){
  unsigned int list_id=FOURCC_LIST;
  int le_len;
  int le_id;
  len+=4; // list fix
  list_id = le2me_32(list_id);
  le_len = le2me_32(len);
  le_id = le2me_32(id);
  stream_write_buffer(stream, &list_id, 4);
  stream_write_buffer(stream, &le_len, 4);
  stream_write_buffer(stream, &le_id, 4);
}

#define WFSIZE(wf) (sizeof(WAVEFORMATEX)+(wf)->cbSize)

static void avifile_write_header(muxer_t *muxer){
  uint32_t riff[3];
  unsigned int dmlh[1];
  unsigned int i;
  unsigned int hdrsize;
  muxer_info_t info[16];
  VideoPropHeader vprp;
  uint32_t aspect = avi_aspect(muxer->def_v);
  struct avi_stream_info *vsi = muxer->def_v->priv;
  int isodml = vsi->riffofspos > 0;

  mp_msg(MSGT_MUXER, MSGL_INFO, MSGTR_WritingHeader);
  if (aspect == 0) {
    mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.\n");
  } else {
    mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: vprp aspect is %d:%d.\n", aspect >> 16, aspect & 0xffff);
  }

  /* deal with stream delays */
  for (i = 0; muxer->streams[i] && i < MUXER_MAX_STREAMS; ++i) {
      muxer_stream_t *s = muxer->streams[i];
      if (s->type == MUXER_TYPE_AUDIO && muxer->audio_delay_fix > 0.0) {
          s->h.dwStart = muxer->audio_delay_fix * s->h.dwRate/s->h.dwScale + 0.5;
          mp_msg(MSGT_MUXER, MSGL_INFO, MSGTR_SettingAudioDelay, (float)s->h.dwStart * s->h.dwScale/s->h.dwRate);
      }
      if (s->type == MUXER_TYPE_VIDEO && muxer->audio_delay_fix < 0.0) {
          s->h.dwStart = -muxer->audio_delay_fix * s->h.dwRate/s->h.dwScale + 0.5;
          mp_msg(MSGT_MUXER, MSGL_INFO, MSGTR_SettingVideoDelay, (float)s->h.dwStart * s->h.dwScale/s->h.dwRate);
      }
  }
  
  if (isodml) {
      unsigned int rifflen, movilen;
      int i;

      vsi->riffofs[vsi->riffofspos+1] = muxer->file_end;

      /* fixup RIFF lengths */
      for (i=0; i<=vsi->riffofspos; i++) {
          rifflen = vsi->riffofs[i+1] - vsi->riffofs[i] - 8;
          movilen = le2me_32(rifflen - 12);
          rifflen = le2me_32(rifflen);
          stream_seek(muxer->stream, vsi->riffofs[i]+4);
          stream_write_buffer(muxer->stream,&rifflen,4);

          /* fixup movi length */
          if (i > 0) {
              stream_seek(muxer->stream, vsi->riffofs[i]+16);
              stream_write_buffer(muxer->stream,&movilen,4);
          }
      }

      stream_seek(muxer->stream, 12);
  } else {
    // RIFF header:
    riff[0]=mmioFOURCC('R','I','F','F');
    riff[1]=muxer->file_end-2*sizeof(unsigned int);  // filesize
    riff[2]=formtypeAVI; // 'AVI '
    riff[0]=le2me_32(riff[0]);
    riff[1]=le2me_32(riff[1]);
    riff[2]=le2me_32(riff[2]);
    stream_write_buffer(muxer->stream,&riff,12);
  }

  // update AVI header:
  if(muxer->def_v){
      int i;
      muxer->avih.dwMicroSecPerFrame=1000000.0*muxer->def_v->h.dwScale/muxer->def_v->h.dwRate;
//      muxer->avih.dwMaxBytesPerSec=1000000; // dummy!!!!! FIXME
//      muxer->avih.dwPaddingGranularity=2; // ???
      muxer->avih.dwFlags|=AVIF_ISINTERLEAVED|AVIF_TRUSTCKTYPE;
      muxer->avih.dwTotalFrames=0;
      for (i=0; i<muxer->idx_pos; i++) {
          if (muxer->idx[i].ckid == muxer->def_v->ckid)
              muxer->avih.dwTotalFrames++;
      }
//      muxer->avih.dwSuggestedBufferSize=muxer->def_v->h.dwSuggestedBufferSize;
      muxer->avih.dwWidth=muxer->def_v->bih->biWidth;
      muxer->avih.dwHeight=muxer->def_v->bih->biHeight;
  }

  // AVI header:
  hdrsize=sizeof(muxer->avih)+8;
  if (isodml) hdrsize+=sizeof(dmlh)+20; // dmlh
  // calc total header size:
  for(i=0;i<muxer->avih.dwStreams;i++){
      muxer_stream_t *s = muxer->streams[i];
      struct avi_stream_info *si = s->priv;

      hdrsize+=12; // LIST
      hdrsize+=sizeof(muxer->streams[i]->h)+8; // strh
      switch(muxer->streams[i]->type){
      case MUXER_TYPE_VIDEO:
          hdrsize+=muxer->streams[i]->bih->biSize+8; // strf
	  if (aspect != 0) {
	      hdrsize+=8+4*(9+8*1); // vprp
	  }
	  break;
      case MUXER_TYPE_AUDIO:
          hdrsize+=WFSIZE(muxer->streams[i]->wf)+8; // strf
	  break;
      }
      if (isodml && si && si->superidx && si->superidxsize) {
	  hdrsize += 32 + 16*si->superidxsize; //indx
      }
  }
  write_avi_list(muxer->stream,listtypeAVIHEADER,hdrsize);
  
  le2me_MainAVIHeader(&muxer->avih);
  write_avi_chunk(muxer->stream,ckidAVIMAINHDR,sizeof(muxer->avih),&muxer->avih); /* MainAVIHeader */
  le2me_MainAVIHeader(&muxer->avih);

  // stream headers:
  for(i=0;i<muxer->avih.dwStreams;i++){
      muxer_stream_t *s = muxer->streams[i];
      struct avi_stream_info *si = s->priv;
      unsigned int idxhdr[8];
      int j,n;

      hdrsize=sizeof(s->h)+8; // strh
      if (si && si->superidx && si->superidxsize) {
	  hdrsize += 32 + 16*si->superidxsize; //indx
      }
      switch(s->type){
      case MUXER_TYPE_VIDEO:
          hdrsize+=s->bih->biSize+8; // strf
          s->h.fccHandler = s->bih->biCompression;
          s->h.rcFrame.right = s->bih->biWidth;
          s->h.rcFrame.bottom = s->bih->biHeight;
	  if (aspect != 0) {
	      // fill out vprp info
	      memset(&vprp, 0, sizeof(vprp));
	      vprp.dwVerticalRefreshRate = (s->h.dwRate+s->h.dwScale-1)/s->h.dwScale;
	      vprp.dwHTotalInT = muxer->avih.dwWidth;
	      vprp.dwVTotalInLines = muxer->avih.dwHeight;
	      vprp.dwFrameAspectRatio = aspect;
	      vprp.dwFrameWidthInPixels = muxer->avih.dwWidth;
	      vprp.dwFrameHeightInLines = muxer->avih.dwHeight;
	      vprp.nbFieldPerFrame = 1;
	      vprp.FieldInfo[0].CompressedBMHeight = muxer->avih.dwHeight;
	      vprp.FieldInfo[0].CompressedBMWidth = muxer->avih.dwWidth;
	      vprp.FieldInfo[0].ValidBMHeight = muxer->avih.dwHeight;
	      vprp.FieldInfo[0].ValidBMWidth = muxer->avih.dwWidth;
	      hdrsize+=8+4*(9+8*1); // vprp
	  }
	  break;
      case MUXER_TYPE_AUDIO:
          hdrsize+=WFSIZE(s->wf)+8; // strf
          s->h.fccHandler = s->wf->wFormatTag;
	  break;
      }

      write_avi_list(muxer->stream,listtypeSTREAMHEADER,hdrsize);
      le2me_AVIStreamHeader(&s->h);
      write_avi_chunk(muxer->stream,ckidSTREAMHEADER,sizeof(s->h),&s->h); /* AVISTreamHeader */ // strh
      le2me_AVIStreamHeader(&s->h);

      switch(s->type){
      case MUXER_TYPE_VIDEO:
{
          int biSize=s->bih->biSize;
          le2me_BITMAPINFOHEADER(s->bih);
          write_avi_chunk(muxer->stream,ckidSTREAMFORMAT,biSize,s->bih); /* BITMAPINFOHEADER */
          le2me_BITMAPINFOHEADER(s->bih);

	  if (aspect != 0) {
	      int fields = vprp.nbFieldPerFrame;
	      le2me_VideoPropHeader(&vprp);
	      le2me_VIDEO_FIELD_DESC(&vprp.FieldInfo[0]);
	      le2me_VIDEO_FIELD_DESC(&vprp.FieldInfo[1]);
	      write_avi_chunk(muxer->stream,mmioFOURCC('v','p','r','p'),
	                      sizeof(VideoPropHeader) -
	                      sizeof(VIDEO_FIELD_DESC)*(2-fields),
	                      &vprp); /* Video Properties Header */
	  }
}
	  break;
      case MUXER_TYPE_AUDIO:
{
          int wfsize = WFSIZE(s->wf);
          le2me_WAVEFORMATEX(s->wf);
          write_avi_chunk(muxer->stream,ckidSTREAMFORMAT,wfsize,s->wf); /* WAVEFORMATEX */
          le2me_WAVEFORMATEX(s->wf);
}	  
	  break;
      }
      if (isodml && si && si->superidx && si->superidxsize) {
	  n = si->superidxsize;

	  idxhdr[0] = le2me_32(mmioFOURCC('i', 'n', 'd', 'x'));
	  idxhdr[1] = le2me_32(24 + 16*n);
	  idxhdr[2] = le2me_32(0x00000004);
	  idxhdr[3] = le2me_32(si->superidxpos);
	  idxhdr[4] = le2me_32(s->ckid);
	  idxhdr[5] = 0;
	  idxhdr[6] = 0;
	  idxhdr[7] = 0;

	  stream_write_buffer(muxer->stream,idxhdr,sizeof(idxhdr));
	  for (j=0; j<n; j++) {
	      struct avi_odmlsuperidx_entry *entry = &si->superidx[j];
	      unsigned int data[4];
	      data[0] = le2me_32(entry->ofs);
	      data[1] = le2me_32(entry->ofs >> 32);
	      data[2] = le2me_32(entry->len);
	      data[3] = le2me_32(entry->duration);
	      stream_write_buffer(muxer->stream,data,sizeof(data));
	  }
      }
  }

  // ODML
  if (isodml) {
      memset(dmlh, 0, sizeof(dmlh));
      dmlh[0] = le2me_32(muxer->avih.dwTotalFrames);
      write_avi_list(muxer->stream,mmioFOURCC('o','d','m','l'),sizeof(dmlh)+8);
      write_avi_chunk(muxer->stream,mmioFOURCC('d','m','l','h'),sizeof(dmlh),dmlh);
  }

// ============= INFO ===============
// always include software info
info[0].id=mmioFOURCC('I','S','F','T'); // Software:
info[0].text="MEncoder " VERSION;
// include any optional strings
i=1;
if(info_name!=NULL){
  info[i].id=mmioFOURCC('I','N','A','M'); // Name:
  info[i++].text=info_name;
}
if(info_artist!=NULL){
  info[i].id=mmioFOURCC('I','A','R','T'); // Artist:
  info[i++].text=info_artist;
}
if(info_genre!=NULL){
  info[i].id=mmioFOURCC('I','G','N','R'); // Genre:
  info[i++].text=info_genre;
}
if(info_subject!=NULL){
  info[i].id=mmioFOURCC('I','S','B','J'); // Subject:
  info[i++].text=info_subject;
}
if(info_copyright!=NULL){
  info[i].id=mmioFOURCC('I','C','O','P'); // Copyright:
  info[i++].text=info_copyright;
}
if(info_sourceform!=NULL){
  info[i].id=mmioFOURCC('I','S','R','F'); // Source Form:
  info[i++].text=info_sourceform;
}
if(info_comment!=NULL){
  info[i].id=mmioFOURCC('I','C','M','T'); // Comment:
  info[i++].text=info_comment;
}
info[i].id=0;

  hdrsize=0;
  // calc info size:
  for(i=0;info[i].id!=0;i++) if(info[i].text){
      size_t sz=strlen(info[i].text)+1;
      hdrsize+=sz+8+sz%2;
  }
  // write infos:
  if (hdrsize!=0){
      write_avi_list(muxer->stream,mmioFOURCC('I','N','F','O'),hdrsize);
      for(i=0;info[i].id!=0;i++) if(info[i].text){
          write_avi_chunk(muxer->stream,info[i].id,strlen(info[i].text)+1,info[i].text);
      }
  }

  // JUNK:
  write_avi_chunk(muxer->stream,ckidAVIPADDING,MOVIALIGN-(stream_tell(muxer->stream)%MOVIALIGN)-8,NULL); /* junk */
  if (!isodml) {
    // 'movi' header:
    write_avi_list(muxer->stream,listtypeAVIMOVIE,muxer->movi_end-stream_tell(muxer->stream)-12);
  } else {
    if (stream_tell(muxer->stream) != MOVIALIGN) {
	mp_msg(MSGT_MUXER, MSGL_ERR, "Opendml superindex is too big for reserved space!\n");
	mp_msg(MSGT_MUXER, MSGL_ERR, "Expected filepos %d, real filepos %ld, missing space %ld\n", MOVIALIGN, stream_tell(muxer->stream), stream_tell(muxer->stream)-MOVIALIGN);
	mp_msg(MSGT_MUXER, MSGL_ERR, "Try increasing MOVIALIGN in libmpdemux/muxer_avi.c\n");
    }
    write_avi_list(muxer->stream,listtypeAVIMOVIE,muxer->movi_end-stream_tell(muxer->stream)-12);
  }
  muxer->movi_start=stream_tell(muxer->stream);
  if (muxer->file_end == 0) muxer->file_end = stream_tell(muxer->stream);
}

static void avifile_odml_write_index(muxer_t *muxer){
  muxer_stream_t* s;
  struct avi_stream_info *si;
  int i;

  for (i=0; i<muxer->avih.dwStreams; i++) {
    int j,k,n,idxpos,len,last,entries_per_subidx;
    unsigned int idxhdr[8];
    s = muxer->streams[i];
    si = s->priv;

    /*
     * According to Avery Lee MSMP wants the subidx chunks to have the same size.
     *
     * So this code figures out how many entries we can put into
     * an ix?? chunk, so that each ix?? chunk has the same size and the offsets
     * don't overflow (Using ODML_CHUNKLEN for that is a bit more restrictive
     * than it has to be though).
     */

    len = 0;
    n = 0;
    entries_per_subidx = INT_MAX;
    do {
	off_t start = si->idx[0].ofs;
	last = entries_per_subidx;
	for (j=0; j<si->idxpos; j++) {
	    len = si->idx[j].ofs - start;
	    if(len >= ODML_CHUNKLEN || n >= entries_per_subidx) {
		if (entries_per_subidx > n) {
		    entries_per_subidx = n;
		}
		start = si->idx[j].ofs;
		len = 0;
		n = 0;
	    }
	    n++;
	}
    } while (last != entries_per_subidx);

    si->superidxpos = (si->idxpos+entries_per_subidx-1) / entries_per_subidx;

    mp_msg(MSGT_MUXER, MSGL_V, "ODML: Stream %d: Using %d entries per subidx, %d entries in superidx\n",
		i, entries_per_subidx, si->superidxpos);

    si->superidxsize = si->superidxpos;
    si->superidx = calloc(si->superidxsize, sizeof(*si->superidx));
    memset(si->superidx, 0, sizeof(*si->superidx) * si->superidxsize);

    idxpos = 0;
    for (j=0; j<si->superidxpos; j++) {
	off_t start = si->idx[idxpos].ofs;
	int duration;

	duration = 0;
	for (k=0; k<entries_per_subidx && idxpos+k<si->idxpos; k++) {
		duration += s->h.dwSampleSize ? si->idx[idxpos+k].len/s->h.dwSampleSize : 1;
	}

	idxhdr[0] = le2me_32((s->ckid << 16) | mmioFOURCC('i', 'x', 0, 0));
	idxhdr[1] = le2me_32(24 + 8*k);
	idxhdr[2] = le2me_32(0x01000002);
	idxhdr[3] = le2me_32(k);
	idxhdr[4] = le2me_32(s->ckid);
	idxhdr[5] = le2me_32(start + 8);
	idxhdr[6] = le2me_32((start + 8)>> 32);
	idxhdr[7] = 0; /* unused */

	si->superidx[j].len = 32 + 8*k;
	si->superidx[j].ofs = stream_tell(muxer->stream);
	si->superidx[j].duration = duration;

	stream_write_buffer(muxer->stream, idxhdr,sizeof(idxhdr));
	for (k=0; k<entries_per_subidx && idxpos<si->idxpos; k++) {
	    unsigned int entry[2];
	    entry[0] = le2me_32(si->idx[idxpos].ofs - start);
	    entry[1] = le2me_32(si->idx[idxpos].len | si->idx[idxpos].flags);
	    idxpos++;
	    stream_write_buffer(muxer->stream, entry, sizeof(entry));
	}
     }
  }
  muxer->file_end=stream_tell(muxer->stream);
}

static void avifile_write_standard_index(muxer_t *muxer){

  muxer->movi_end=stream_tell(muxer->stream);
  if(muxer->idx && muxer->idx_pos>0){
      int i;
      // fixup index entries:
//      for(i=0;i<muxer->idx_pos;i++) muxer->idx[i].dwChunkOffset-=muxer->movi_start-4;
      // write index chunk:
      for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
      write_avi_chunk(muxer->stream,ckidAVINEWINDEX,16*muxer->idx_pos,muxer->idx); /* AVIINDEXENTRY */
      for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
      muxer->avih.dwFlags|=AVIF_HASINDEX;
  }
  muxer->file_end=stream_tell(muxer->stream);
}

static void avifile_write_index(muxer_t *muxer){
  struct avi_stream_info *vsi = muxer->def_v->priv;

  mp_msg(MSGT_MUXER, MSGL_INFO, MSGTR_WritingTrailer);
  if (vsi->riffofspos > 0){
    avifile_odml_write_index(muxer);
  } else {
    avifile_write_standard_index(muxer);
  }
}

static void avifile_fix_parameters(muxer_stream_t *s){
  /* adjust audio_delay_fix according to individual stream delay */
  if (s->type == MUXER_TYPE_AUDIO)
    s->muxer->audio_delay_fix -= (float)s->decoder_delay * s->h.dwScale/s->h.dwRate;
  if (s->type == MUXER_TYPE_VIDEO)
    s->muxer->audio_delay_fix += (float)s->decoder_delay * s->h.dwScale/s->h.dwRate;
}

int muxer_init_muxer_avi(muxer_t *muxer){
  muxer->cont_new_stream = &avifile_new_stream;
  muxer->cont_write_chunk = &avifile_write_chunk;
  muxer->cont_write_header = &avifile_write_header;
  muxer->cont_write_index = &avifile_write_index;
  muxer->fix_stream_parameters = &avifile_fix_parameters;
  return 1;
}