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