libmpdemux/muxer_avi.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <inttypes.h>
  23 #include <unistd.h>
  24 #include <limits.h>
  25
  26 #include "config.h"
  27 #include "version.h"
  28
  29 #include "stream/stream.h"
  30 #include "demuxer.h"
  31 #include "stheader.h"
  32
  33 #include "muxer.h"
  34 #include "aviheader.h"
  35 #include "ms_hdr.h"
  36 #include "mp_msg.h"
  37
  38 extern char *info_name;
  39 extern char *info_artist;
  40 extern char *info_genre;
  41 extern char *info_subject;
  42 extern char *info_copyright;
  43 extern char *info_sourceform;
  44 extern char *info_comment;
  45
  46 /* #define ODML_CHUNKLEN    0x02000000 */ /* for testing purposes */
  47 #define ODML_CHUNKLEN    0x40000000
  48 #define ODML_NOTKEYFRAME 0x80000000U
  49 #define MOVIALIGN        0x00001000
  50
  51 float avi_aspect_override = -1.0;
  52 int write_odml = 1;
  53
  54 struct avi_odmlidx_entry {
  55         uint64_t ofs;
  56         uint32_t len;
  57         uint32_t flags;
  58 };
  59
  60 struct avi_odmlsuperidx_entry {
  61         uint64_t ofs;
  62         uint32_t len;
  63         uint32_t duration;
  64 };
  65
  66 struct avi_stream_info {
  67         int idxsize;
  68         int idxpos;
  69         int superidxpos;
  70         int superidxsize;
  71         int riffofspos;
  72         int riffofssize;
  73         off_t *riffofs;
  74         struct avi_odmlidx_entry *idx;
  75         struct avi_odmlsuperidx_entry *superidx;
  76 };
  77
  78 static unsigned int avi_aspect(muxer_stream_t *vstream)
  79 {
  80     int x,y;
  81     float aspect = vstream->aspect;
  82
  83     if (avi_aspect_override > 0.0) {
  84         aspect = avi_aspect_override;
  85     }
  86
  87     if (aspect <= 0.0) return 0;
  88
  89     if (aspect > 15.99/9.0 && aspect < 16.01/9.0) {
  90         return MAKE_AVI_ASPECT(16, 9);
  91     }
  92     if (aspect > 3.99/3.0 && aspect < 4.01/3.0) {
  93         return MAKE_AVI_ASPECT(4, 3);
  94     }
  95
  96     if (aspect >= 1.0) {
  97         x = 16384;
  98         y = (float)x / aspect;
  99     } else {
 100         y = 16384;
 101         x = (float)y * aspect;
 102     }
 103
 104     return MAKE_AVI_ASPECT(x, y);
 105 }
 106
 107 static muxer_stream_t* avifile_new_stream(muxer_t *muxer,int type){
 108     struct avi_stream_info *si;
 109     muxer_stream_t* s;
 110     if (!muxer) return NULL;
 111     if(muxer->avih.dwStreams>=MUXER_MAX_STREAMS){
 112         mp_msg(MSGT_MUXER, MSGL_ERR, "Too many streams! increase MUXER_MAX_STREAMS !\n");
 113         return NULL;
 114     }
 115     s=malloc(sizeof(muxer_stream_t));
 116     memset(s,0,sizeof(muxer_stream_t));
 117     if(!s) return NULL; // no mem!?
 118     muxer->streams[muxer->avih.dwStreams]=s;
 119     s->type=type;
 120     s->id=muxer->avih.dwStreams;
 121     s->timer=0.0;
 122     s->size=0;
 123     s->muxer=muxer;
 124     s->priv=si=malloc(sizeof(struct avi_stream_info));
 125     memset(si,0,sizeof(struct avi_stream_info));
 126     si->idxsize=256;
 127     si->idx=calloc(si->idxsize, sizeof(struct avi_odmlidx_entry));
 128     si->riffofssize=16;
 129     si->riffofs=calloc((si->riffofssize+1), sizeof(off_t));
 130     memset(si->riffofs, 0, sizeof(off_t)*si->riffofssize);
 131
 132     switch(type){
 133     case MUXER_TYPE_VIDEO:
 134       s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'d','c');
 135       s->h.fccType=streamtypeVIDEO;
 136       if(!muxer->def_v) muxer->def_v=s;
 137       break;
 138     case MUXER_TYPE_AUDIO:
 139       s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'w','b');
 140       s->h.fccType=streamtypeAUDIO;
 141       break;
 142     default:
 143       mp_msg(MSGT_MUXER, MSGL_WARN, "Warning! unknown stream type: %d\n",type);
 144       return NULL;
 145     }
 146     muxer->avih.dwStreams++;
 147     return s;
 148 }
 149
 150 static void write_avi_chunk(stream_t *stream,unsigned int id,int len,void* data){
 151  int le_len = le2me_32(len);
 152  int le_id = le2me_32(id);
 153  stream_write_buffer(stream, &le_id, 4);
 154  stream_write_buffer(stream, &le_len, 4);
 155
 156 if(len>0){
 157   if(data){
 158     // DATA
 159     stream_write_buffer(stream, data, len);
 160     if(len&1){  // padding
 161       unsigned char zerobyte=0;
 162       stream_write_buffer(stream, &zerobyte, 1);
 163     }
 164   } else {
 165     // JUNK
 166     char *avi_junk_data="[= MPlayer junk data! =]";
 167     if(len&1) ++len; // padding
 168     while(len>0){
 169       int l=strlen(avi_junk_data);
 170       if(l>len) l=len;
 171       stream_write_buffer(stream, avi_junk_data, l);
 172       len-=l;
 173     }
 174   }
 175 }
 176 }
 177
 178 static void write_avi_list(stream_t *s,unsigned int id,int len);
 179 static void avifile_write_standard_index(muxer_t *muxer);
 180
 181 static void avifile_odml_new_riff(muxer_t *muxer)
 182 {
 183     struct avi_stream_info *vsi = muxer->def_v->priv;
 184     uint32_t riff[3];
 185
 186     mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: Starting new RIFF chunk at %dMB.\n", (int)(muxer->file_end/1024/1024));
 187
 188     vsi->riffofspos++;
 189     if (vsi->riffofspos>=vsi->riffofssize) {
 190         vsi->riffofssize+=16;
 191         vsi->riffofs=realloc_struct(vsi->riffofs,(vsi->riffofssize+1),sizeof(off_t));
 192     }
 193     vsi->riffofs[vsi->riffofspos] = stream_tell(muxer->stream);
 194
 195     /* RIFF/AVIX chunk */
 196     riff[0]=le2me_32(mmioFOURCC('R','I','F','F'));
 197     riff[1]=0;
 198     riff[2]=le2me_32(mmioFOURCC('A','V','I','X'));
 199     stream_write_buffer(muxer->stream, riff, 12);
 200
 201     write_avi_list(muxer->stream,listtypeAVIMOVIE,0);
 202
 203     muxer->file_end = stream_tell(muxer->stream);
 204 }
 205
 206 static void avifile_write_header(muxer_t *muxer);
 207
 208 static void avifile_write_chunk(muxer_stream_t *s,size_t len,unsigned int flags, double dts, double pts){
 209     off_t rifflen;
 210     muxer_t *muxer=s->muxer;
 211     struct avi_stream_info *si = s->priv;
 212     struct avi_stream_info *vsi = muxer->def_v->priv;
 213     int paddedlen = len + (len&1);
 214
 215     if (s->type == MUXER_TYPE_VIDEO && !s->h.dwSuggestedBufferSize) {
 216         off_t pos=stream_tell(muxer->stream);
 217         stream_seek(muxer->stream, 0);
 218         avifile_write_header(muxer);
 219         stream_seek(muxer->stream, pos);
 220     }
 221   if(index_mode){
 222     rifflen = muxer->file_end - vsi->riffofs[vsi->riffofspos] - 8;
 223     if (vsi->riffofspos == 0) {
 224         rifflen += 8+muxer->idx_pos*sizeof(AVIINDEXENTRY);
 225     }
 226     if (rifflen + paddedlen > ODML_CHUNKLEN && write_odml == 1) {
 227         if (vsi->riffofspos == 0) {
 228             avifile_write_standard_index(muxer);
 229         }
 230         avifile_odml_new_riff(muxer);
 231     }
 232
 233     if (vsi->riffofspos == 0) {
 234         // add to the traditional index:
 235         if(muxer->idx_pos>=muxer->idx_size){
 236             muxer->idx_size+=256; // 4kB
 237             muxer->idx=realloc_struct(muxer->idx,muxer->idx_size,16);
 238         }
 239         muxer->idx[muxer->idx_pos].ckid=s->ckid;
 240         muxer->idx[muxer->idx_pos].dwFlags=flags; // keyframe?
 241         muxer->idx[muxer->idx_pos].dwChunkOffset=muxer->file_end-(muxer->movi_start-4);
 242         muxer->idx[muxer->idx_pos].dwChunkLength=len;
 243         ++muxer->idx_pos;
 244     }
 245
 246     // add to odml index
 247     if(si->idxpos>=si->idxsize){
 248         si->idxsize+=256;
 249         si->idx=realloc_struct(si->idx,si->idxsize,sizeof(*si->idx));
 250     }
 251     si->idx[si->idxpos].flags=(flags&AVIIF_KEYFRAME)?0:ODML_NOTKEYFRAME;
 252     si->idx[si->idxpos].ofs=muxer->file_end;
 253     si->idx[si->idxpos].len=len;
 254     ++si->idxpos;
 255   }
 256     // write out the chunk:
 257     write_avi_chunk(muxer->stream,s->ckid,len,s->buffer); /* unsigned char */
 258
 259     if (len > s->h.dwSuggestedBufferSize){
 260         s->h.dwSuggestedBufferSize = len;
 261     }
 262     if((unsigned int)len>s->h.dwSuggestedBufferSize) s->h.dwSuggestedBufferSize=len;
 263
 264     muxer->file_end += 8 + paddedlen;
 265 }
 266
 267 static void write_avi_list(stream_t *stream,unsigned int id,int len){
 268   unsigned int list_id=FOURCC_LIST;
 269   int le_len;
 270   int le_id;
 271   len+=4; // list fix
 272   list_id = le2me_32(list_id);
 273   le_len = le2me_32(len);
 274   le_id = le2me_32(id);
 275   stream_write_buffer(stream, &list_id, 4);
 276   stream_write_buffer(stream, &le_len, 4);
 277   stream_write_buffer(stream, &le_id, 4);
 278 }
 279
 280 #define WFSIZE(wf) (sizeof(WAVEFORMATEX)+(wf)->cbSize)
 281
 282 static void avifile_write_header(muxer_t *muxer){
 283   uint32_t riff[3];
 284   unsigned int dmlh[1];
 285   unsigned int i;
 286   unsigned int hdrsize;
 287   muxer_info_t info[16];
 288   VideoPropHeader vprp;
 289   uint32_t aspect = avi_aspect(muxer->def_v);
 290   struct avi_stream_info *vsi = muxer->def_v->priv;
 291   int isodml = vsi->riffofspos > 0;
 292
 293   mp_tmsg(MSGT_MUXER, MSGL_INFO, "Writing header...\n");
 294   if (aspect == 0) {
 295     mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: Aspect information not (yet?) available or unspecified, not writing vprp header.\n");
 296   } else {
 297     mp_msg(MSGT_MUXER, MSGL_INFO, "ODML: vprp aspect is %d:%d.\n", aspect >> 16, aspect & 0xffff);
 298   }
 299
 300   /* deal with stream delays */
 301   for (i = 0; muxer->streams[i] && i < MUXER_MAX_STREAMS; ++i) {
 302       muxer_stream_t *s = muxer->streams[i];
 303       if (s->type == MUXER_TYPE_AUDIO && muxer->audio_delay_fix > 0.0) {
 304           s->h.dwStart = muxer->audio_delay_fix * s->h.dwRate/s->h.dwScale + 0.5;
 305           mp_tmsg(MSGT_MUXER, MSGL_INFO, "Setting audio delay to %5.3fs.\n", (float)s->h.dwStart * s->h.dwScale/s->h.dwRate);
 306       }
 307       if (s->type == MUXER_TYPE_VIDEO && muxer->audio_delay_fix < 0.0) {
 308           s->h.dwStart = -muxer->audio_delay_fix * s->h.dwRate/s->h.dwScale + 0.5;
 309           mp_tmsg(MSGT_MUXER, MSGL_INFO, "Setting video delay to %5.3fs.\n", (float)s->h.dwStart * s->h.dwScale/s->h.dwRate);
 310       }
 311   }
 312
 313   if (isodml) {
 314       unsigned int rifflen, movilen;
 315       int i;
 316
 317       vsi->riffofs[vsi->riffofspos+1] = muxer->file_end;
 318
 319       /* fixup RIFF lengths */
 320       for (i=0; i<=vsi->riffofspos; i++) {
 321           rifflen = vsi->riffofs[i+1] - vsi->riffofs[i] - 8;
 322           movilen = le2me_32(rifflen - 12);
 323           rifflen = le2me_32(rifflen);
 324           stream_seek(muxer->stream, vsi->riffofs[i]+4);
 325           stream_write_buffer(muxer->stream,&rifflen,4);
 326
 327           /* fixup movi length */
 328           if (i > 0) {
 329               stream_seek(muxer->stream, vsi->riffofs[i]+16);
 330               stream_write_buffer(muxer->stream,&movilen,4);
 331           }
 332       }
 333
 334       stream_seek(muxer->stream, 12);
 335   } else {
 336     // RIFF header:
 337     riff[0]=mmioFOURCC('R','I','F','F');
 338     riff[1]=muxer->file_end-2*sizeof(unsigned int);  // filesize
 339     riff[2]=formtypeAVI; // 'AVI '
 340     riff[0]=le2me_32(riff[0]);
 341     riff[1]=le2me_32(riff[1]);
 342     riff[2]=le2me_32(riff[2]);
 343     stream_write_buffer(muxer->stream,&riff,12);
 344   }
 345
 346   // update AVI header:
 347   if(muxer->def_v){
 348       int i;
 349       muxer->avih.dwMicroSecPerFrame=1000000.0*muxer->def_v->h.dwScale/muxer->def_v->h.dwRate;
 350 //      muxer->avih.dwMaxBytesPerSec=1000000; // dummy!!!!! FIXME
 351 //      muxer->avih.dwPaddingGranularity=2; // ???
 352       muxer->avih.dwFlags|=AVIF_ISINTERLEAVED|AVIF_TRUSTCKTYPE;
 353       muxer->avih.dwTotalFrames=0;
 354       for (i=0; i<muxer->idx_pos; i++) {
 355           if (muxer->idx[i].ckid == muxer->def_v->ckid)
 356               muxer->avih.dwTotalFrames++;
 357       }
 358 //      muxer->avih.dwSuggestedBufferSize=muxer->def_v->h.dwSuggestedBufferSize;
 359       muxer->avih.dwWidth=muxer->def_v->bih->biWidth;
 360       muxer->avih.dwHeight=muxer->def_v->bih->biHeight;
 361   }
 362
 363   // AVI header:
 364   hdrsize=sizeof(muxer->avih)+8;
 365   if (isodml) hdrsize+=sizeof(dmlh)+20; // dmlh
 366   // calc total header size:
 367   for(i=0;i<muxer->avih.dwStreams;i++){
 368       muxer_stream_t *s = muxer->streams[i];
 369       struct avi_stream_info *si = s->priv;
 370
 371       hdrsize+=12; // LIST
 372       hdrsize+=sizeof(muxer->streams[i]->h)+8; // strh
 373       switch(muxer->streams[i]->type){
 374       case MUXER_TYPE_VIDEO:
 375           hdrsize+=muxer->streams[i]->bih->biSize+8; // strf
 376           if (aspect != 0) {
 377               hdrsize+=8+4*(9+8*1); // vprp
 378           }
 379           break;
 380       case MUXER_TYPE_AUDIO:
 381           hdrsize+=WFSIZE(muxer->streams[i]->wf)+8; // strf
 382           break;
 383       }
 384       if (isodml && si && si->superidx && si->superidxsize) {
 385           hdrsize += 32 + 16*si->superidxsize; //indx
 386       }
 387   }
 388   write_avi_list(muxer->stream,listtypeAVIHEADER,hdrsize);
 389
 390   le2me_MainAVIHeader(&muxer->avih);
 391   write_avi_chunk(muxer->stream,ckidAVIMAINHDR,sizeof(muxer->avih),&muxer->avih); /* MainAVIHeader */
 392   le2me_MainAVIHeader(&muxer->avih);
 393
 394   // stream headers:
 395   for(i=0;i<muxer->avih.dwStreams;i++){
 396       muxer_stream_t *s = muxer->streams[i];
 397       struct avi_stream_info *si = s->priv;
 398       unsigned int idxhdr[8];
 399       int j,n;
 400
 401       hdrsize=sizeof(s->h)+8; // strh
 402       if (si && si->superidx && si->superidxsize) {
 403           hdrsize += 32 + 16*si->superidxsize; //indx
 404       }
 405       switch(s->type){
 406       case MUXER_TYPE_VIDEO:
 407           hdrsize+=s->bih->biSize+8; // strf
 408           s->h.fccHandler = s->bih->biCompression;
 409           s->h.rcFrame.right = s->bih->biWidth;
 410           s->h.rcFrame.bottom = s->bih->biHeight;
 411           if (aspect != 0) {
 412               // fill out vprp info
 413               memset(&vprp, 0, sizeof(vprp));
 414               vprp.dwVerticalRefreshRate = (s->h.dwRate+s->h.dwScale-1)/s->h.dwScale;
 415               vprp.dwHTotalInT = muxer->avih.dwWidth;
 416               vprp.dwVTotalInLines = muxer->avih.dwHeight;
 417               vprp.dwFrameAspectRatio = aspect;
 418               vprp.dwFrameWidthInPixels = muxer->avih.dwWidth;
 419               vprp.dwFrameHeightInLines = muxer->avih.dwHeight;
 420               vprp.nbFieldPerFrame = 1;
 421               vprp.FieldInfo[0].CompressedBMHeight = muxer->avih.dwHeight;
 422               vprp.FieldInfo[0].CompressedBMWidth = muxer->avih.dwWidth;
 423               vprp.FieldInfo[0].ValidBMHeight = muxer->avih.dwHeight;
 424               vprp.FieldInfo[0].ValidBMWidth = muxer->avih.dwWidth;
 425               hdrsize+=8+4*(9+8*1); // vprp
 426           }
 427           break;
 428       case MUXER_TYPE_AUDIO:
 429           hdrsize+=WFSIZE(s->wf)+8; // strf
 430           s->h.fccHandler = s->wf->wFormatTag;
 431           break;
 432       }
 433
 434       write_avi_list(muxer->stream,listtypeSTREAMHEADER,hdrsize);
 435       le2me_AVIStreamHeader(&s->h);
 436       write_avi_chunk(muxer->stream,ckidSTREAMHEADER,sizeof(s->h),&s->h); /* AVISTreamHeader */ // strh
 437       le2me_AVIStreamHeader(&s->h);
 438
 439       switch(s->type){
 440       case MUXER_TYPE_VIDEO:
 441 {
 442           int biSize=s->bih->biSize;
 443           le2me_BITMAPINFOHEADER(s->bih);
 444           write_avi_chunk(muxer->stream,ckidSTREAMFORMAT,biSize,s->bih); /* BITMAPINFOHEADER */
 445           le2me_BITMAPINFOHEADER(s->bih);
 446
 447           if (aspect != 0) {
 448               int fields = vprp.nbFieldPerFrame;
 449               le2me_VideoPropHeader(&vprp);
 450               le2me_VIDEO_FIELD_DESC(&vprp.FieldInfo[0]);
 451               le2me_VIDEO_FIELD_DESC(&vprp.FieldInfo[1]);
 452               write_avi_chunk(muxer->stream,mmioFOURCC('v','p','r','p'),
 453                               sizeof(VideoPropHeader) -
 454                               sizeof(VIDEO_FIELD_DESC)*(2-fields),
 455                               &vprp); /* Video Properties Header */
 456           }
 457 }
 458           break;
 459       case MUXER_TYPE_AUDIO:
 460 {
 461           int wfsize = WFSIZE(s->wf);
 462           le2me_WAVEFORMATEX(s->wf);
 463           write_avi_chunk(muxer->stream,ckidSTREAMFORMAT,wfsize,s->wf); /* WAVEFORMATEX */
 464           le2me_WAVEFORMATEX(s->wf);
 465 }
 466           break;
 467       }
 468       if (isodml && si && si->superidx && si->superidxsize) {
 469           n = si->superidxsize;
 470
 471           idxhdr[0] = le2me_32(mmioFOURCC('i', 'n', 'd', 'x'));
 472           idxhdr[1] = le2me_32(24 + 16*n);
 473           idxhdr[2] = le2me_32(0x00000004);
 474           idxhdr[3] = le2me_32(si->superidxpos);
 475           idxhdr[4] = le2me_32(s->ckid);
 476           idxhdr[5] = 0;
 477           idxhdr[6] = 0;
 478           idxhdr[7] = 0;
 479
 480           stream_write_buffer(muxer->stream,idxhdr,sizeof(idxhdr));
 481           for (j=0; j<n; j++) {
 482               struct avi_odmlsuperidx_entry *entry = &si->superidx[j];
 483               unsigned int data[4];
 484               data[0] = le2me_32(entry->ofs);
 485               data[1] = le2me_32(entry->ofs >> 32);
 486               data[2] = le2me_32(entry->len);
 487               data[3] = le2me_32(entry->duration);
 488               stream_write_buffer(muxer->stream,data,sizeof(data));
 489           }
 490       }
 491   }
 492
 493   // ODML
 494   if (isodml) {
 495       memset(dmlh, 0, sizeof(dmlh));
 496       dmlh[0] = le2me_32(muxer->avih.dwTotalFrames);
 497       write_avi_list(muxer->stream,mmioFOURCC('o','d','m','l'),sizeof(dmlh)+8);
 498       write_avi_chunk(muxer->stream,mmioFOURCC('d','m','l','h'),sizeof(dmlh),dmlh);
 499   }
 500
 501 // ============= INFO ===============
 502 // always include software info
 503 info[0].id=mmioFOURCC('I','S','F','T'); // Software:
 504 info[0].text="MEncoder " VERSION;
 505 // include any optional strings
 506 i=1;
 507 if(info_name!=NULL){
 508   info[i].id=mmioFOURCC('I','N','A','M'); // Name:
 509   info[i++].text=info_name;
 510 }
 511 if(info_artist!=NULL){
 512   info[i].id=mmioFOURCC('I','A','R','T'); // Artist:
 513   info[i++].text=info_artist;
 514 }
 515 if(info_genre!=NULL){
 516   info[i].id=mmioFOURCC('I','G','N','R'); // Genre:
 517   info[i++].text=info_genre;
 518 }
 519 if(info_subject!=NULL){
 520   info[i].id=mmioFOURCC('I','S','B','J'); // Subject:
 521   info[i++].text=info_subject;
 522 }
 523 if(info_copyright!=NULL){
 524   info[i].id=mmioFOURCC('I','C','O','P'); // Copyright:
 525   info[i++].text=info_copyright;
 526 }
 527 if(info_sourceform!=NULL){
 528   info[i].id=mmioFOURCC('I','S','R','F'); // Source Form:
 529   info[i++].text=info_sourceform;
 530 }
 531 if(info_comment!=NULL){
 532   info[i].id=mmioFOURCC('I','C','M','T'); // Comment:
 533   info[i++].text=info_comment;
 534 }
 535 info[i].id=0;
 536
 537   hdrsize=0;
 538   // calc info size:
 539   for(i=0;info[i].id!=0;i++) if(info[i].text){
 540       size_t sz=strlen(info[i].text)+1;
 541       hdrsize+=sz+8+sz%2;
 542   }
 543   // write infos:
 544   if (hdrsize!=0){
 545       write_avi_list(muxer->stream,mmioFOURCC('I','N','F','O'),hdrsize);
 546       for(i=0;info[i].id!=0;i++) if(info[i].text){
 547           write_avi_chunk(muxer->stream,info[i].id,strlen(info[i].text)+1,info[i].text);
 548       }
 549   }
 550
 551   // JUNK:
 552   write_avi_chunk(muxer->stream,ckidAVIPADDING,MOVIALIGN-(stream_tell(muxer->stream)%MOVIALIGN)-8,NULL); /* junk */
 553   if (!isodml) {
 554     // 'movi' header:
 555     write_avi_list(muxer->stream,listtypeAVIMOVIE,muxer->movi_end-stream_tell(muxer->stream)-12);
 556   } else {
 557     if (stream_tell(muxer->stream) != MOVIALIGN) {
 558         mp_msg(MSGT_MUXER, MSGL_ERR, "Opendml superindex is too big for reserved space!\n");
 559         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);
 560         mp_msg(MSGT_MUXER, MSGL_ERR, "Try increasing MOVIALIGN in libmpdemux/muxer_avi.c\n");
 561     }
 562     write_avi_list(muxer->stream,listtypeAVIMOVIE,muxer->movi_end-stream_tell(muxer->stream)-12);
 563   }
 564   muxer->movi_start=stream_tell(muxer->stream);
 565   if (muxer->file_end == 0) muxer->file_end = stream_tell(muxer->stream);
 566 }
 567
 568 static void avifile_odml_write_index(muxer_t *muxer){
 569   muxer_stream_t* s;
 570   struct avi_stream_info *si;
 571   int i;
 572
 573   for (i=0; i<muxer->avih.dwStreams; i++) {
 574     int j,k,n,idxpos,len,last,entries_per_subidx;
 575     unsigned int idxhdr[8];
 576     s = muxer->streams[i];
 577     si = s->priv;
 578
 579     /*
 580      * According to Avery Lee MSMP wants the subidx chunks to have the same size.
 581      *
 582      * So this code figures out how many entries we can put into
 583      * an ix?? chunk, so that each ix?? chunk has the same size and the offsets
 584      * don't overflow (Using ODML_CHUNKLEN for that is a bit more restrictive
 585      * than it has to be though).
 586      */
 587
 588     len = 0;
 589     n = 0;
 590     entries_per_subidx = INT_MAX;
 591     do {
 592         off_t start = si->idx[0].ofs;
 593         last = entries_per_subidx;
 594         for (j=0; j<si->idxpos; j++) {
 595             len = si->idx[j].ofs - start;
 596             if(len >= ODML_CHUNKLEN || n >= entries_per_subidx) {
 597                 if (entries_per_subidx > n) {
 598                     entries_per_subidx = n;
 599                 }
 600                 start = si->idx[j].ofs;
 601                 len = 0;
 602                 n = 0;
 603             }
 604             n++;
 605         }
 606     } while (last != entries_per_subidx);
 607
 608     si->superidxpos = (si->idxpos+entries_per_subidx-1) / entries_per_subidx;
 609
 610     mp_msg(MSGT_MUXER, MSGL_V, "ODML: Stream %d: Using %d entries per subidx, %d entries in superidx\n",
 611                 i, entries_per_subidx, si->superidxpos);
 612
 613     si->superidxsize = si->superidxpos;
 614     si->superidx = calloc(si->superidxsize, sizeof(*si->superidx));
 615     memset(si->superidx, 0, sizeof(*si->superidx) * si->superidxsize);
 616
 617     idxpos = 0;
 618     for (j=0; j<si->superidxpos; j++) {
 619         off_t start = si->idx[idxpos].ofs;
 620         int duration;
 621
 622         duration = 0;
 623         for (k=0; k<entries_per_subidx && idxpos+k<si->idxpos; k++) {
 624                 duration += s->h.dwSampleSize ? si->idx[idxpos+k].len/s->h.dwSampleSize : 1;
 625         }
 626
 627         idxhdr[0] = le2me_32((s->ckid << 16) | mmioFOURCC('i', 'x', 0, 0));
 628         idxhdr[1] = le2me_32(24 + 8*k);
 629         idxhdr[2] = le2me_32(0x01000002);
 630         idxhdr[3] = le2me_32(k);
 631         idxhdr[4] = le2me_32(s->ckid);
 632         idxhdr[5] = le2me_32(start + 8);
 633         idxhdr[6] = le2me_32((start + 8)>> 32);
 634         idxhdr[7] = 0; /* unused */
 635
 636         si->superidx[j].len = 32 + 8*k;
 637         si->superidx[j].ofs = stream_tell(muxer->stream);
 638         si->superidx[j].duration = duration;
 639
 640         stream_write_buffer(muxer->stream, idxhdr,sizeof(idxhdr));
 641         for (k=0; k<entries_per_subidx && idxpos<si->idxpos; k++) {
 642             unsigned int entry[2];
 643             entry[0] = le2me_32(si->idx[idxpos].ofs - start);
 644             entry[1] = le2me_32(si->idx[idxpos].len | si->idx[idxpos].flags);
 645             idxpos++;
 646             stream_write_buffer(muxer->stream, entry, sizeof(entry));
 647         }
 648      }
 649   }
 650   muxer->file_end=stream_tell(muxer->stream);
 651 }
 652
 653 static void avifile_write_standard_index(muxer_t *muxer){
 654
 655   muxer->movi_end=stream_tell(muxer->stream);
 656   if(muxer->idx && muxer->idx_pos>0){
 657       int i;
 658       // fixup index entries:
 659 //      for(i=0;i<muxer->idx_pos;i++) muxer->idx[i].dwChunkOffset-=muxer->movi_start-4;
 660       // write index chunk:
 661       for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
 662       write_avi_chunk(muxer->stream,ckidAVINEWINDEX,16*muxer->idx_pos,muxer->idx); /* AVIINDEXENTRY */
 663       for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
 664       muxer->avih.dwFlags|=AVIF_HASINDEX;
 665   }
 666   muxer->file_end=stream_tell(muxer->stream);
 667 }
 668
 669 static void avifile_write_index(muxer_t *muxer){
 670   struct avi_stream_info *vsi = muxer->def_v->priv;
 671
 672   mp_tmsg(MSGT_MUXER, MSGL_INFO, "Writing index...\n");
 673   if (vsi->riffofspos > 0){
 674     avifile_odml_write_index(muxer);
 675   } else {
 676     avifile_write_standard_index(muxer);
 677   }
 678 }
 679
 680 static void avifile_fix_parameters(muxer_stream_t *s){
 681   /* adjust audio_delay_fix according to individual stream delay */
 682   if (s->type == MUXER_TYPE_AUDIO)
 683     s->muxer->audio_delay_fix -= (float)s->decoder_delay * s->h.dwScale/s->h.dwRate;
 684   if (s->type == MUXER_TYPE_VIDEO)
 685     s->muxer->audio_delay_fix += (float)s->decoder_delay * s->h.dwScale/s->h.dwRate;
 686 }
 687
 688 int muxer_init_muxer_avi(muxer_t *muxer){
 689   muxer->cont_new_stream = &avifile_new_stream;
 690   muxer->cont_write_chunk = &avifile_write_chunk;
 691   muxer->cont_write_header = &avifile_write_header;
 692   muxer->cont_write_index = &avifile_write_index;
 693   muxer->fix_stream_parameters = &avifile_fix_parameters;
 694   return 1;
 695 }