libmpdemux/demux_avi.c

   1 //  AVI file parser for DEMUXER v2.9  by A'rpi/ESP-team
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6
   7 #include "config.h"
   8 #include "mp_msg.h"
   9 #include "help_mp.h"
  10
  11 #include "stream.h"
  12 #include "demuxer.h"
  13 #include "stheader.h"
  14
  15 #include "aviheader.h"
  16
  17 extern demuxer_t* init_avi_with_ogg(demuxer_t* demuxer);
  18 extern int demux_ogg_open(demuxer_t* demuxer);
  19
  20 extern demuxer_desc_t demuxer_desc_avi_ni;
  21 extern demuxer_desc_t demuxer_desc_avi_nini;
  22
  23 // PTS:  0=interleaved  1=BPS-based
  24 int pts_from_bps=1;
  25
  26 // Select ds from ID
  27 demux_stream_t* demux_avi_select_stream(demuxer_t *demux,unsigned int id){
  28   int stream_id=avi_stream_id(id);
  29
  30
  31   if(demux->video->id==-1)
  32     if(demux->v_streams[stream_id])
  33         demux->video->id=stream_id;
  34
  35   if(demux->audio->id==-1)
  36     if(demux->a_streams[stream_id])
  37         demux->audio->id=stream_id;
  38
  39   if(stream_id==demux->audio->id){
  40       if(!demux->audio->sh){
  41         sh_audio_t* sh;
  42         avi_priv_t *priv=demux->priv;
  43         sh=demux->audio->sh=demux->a_streams[stream_id];
  44         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI audio ID = %d\n",demux->audio->id);
  45         if(sh->wf){
  46           priv->audio_block_size=sh->wf->nBlockAlign;
  47           if(!priv->audio_block_size){
  48             // for PCM audio we can calculate the blocksize:
  49             if(sh->format==1)
  50                 priv->audio_block_size=sh->wf->nChannels*(sh->wf->wBitsPerSample/8);
  51             else
  52                 priv->audio_block_size=1; // hope the best...
  53           } else {
  54             // workaround old mencoder's bug:
  55             if(sh->audio.dwSampleSize==1 && sh->audio.dwScale==1 &&
  56                (sh->wf->nBlockAlign==1152 || sh->wf->nBlockAlign==576)){
  57                 mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_WorkAroundBlockAlignHeaderBug);
  58                 priv->audio_block_size=1;
  59             }
  60           }
  61         } else {
  62           priv->audio_block_size=sh->audio.dwSampleSize;
  63         }
  64       }
  65       return demux->audio;
  66   }
  67   if(stream_id==demux->video->id){
  68       if(!demux->video->sh){
  69         demux->video->sh=demux->v_streams[stream_id];
  70         mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI video ID = %d\n",demux->video->id);
  71       }
  72       return demux->video;
  73   }
  74   if(id!=mmioFOURCC('J','U','N','K')){
  75      // unknown
  76      mp_msg(MSGT_DEMUX,MSGL_DBG2,"Unknown chunk: %.4s (%X)\n",(char *) &id,id);
  77      //abort();
  78   }
  79   return NULL;
  80 }
  81
  82 static int valid_fourcc(unsigned int id){
  83     static const char valid[] = "0123456789abcdefghijklmnopqrstuvwxyz"
  84                                 "ABCDEFGHIJKLMNOPQRSTUVWXYZ_";
  85     unsigned char* fcc=(unsigned char*)(&id);
  86     return strchr(valid, fcc[0]) && strchr(valid, fcc[1]) &&
  87            strchr(valid, fcc[2]) && strchr(valid, fcc[3]);
  88 }
  89
  90 static int choose_chunk_len(unsigned int len1,unsigned int len2){
  91     // len1 has a bit more priority than len2. len1!=len2
  92     // Note: this is a first-idea-logic, may be wrong. comments welcomed.
  93
  94     // prefer small frames rather than 0
  95     if(!len1) return (len2>0x80000) ? len1 : len2;
  96     if(!len2) return (len1>0x100000) ? len2 : len1;
  97
  98     // choose the smaller value:
  99     return (len1<len2)? len1 : len2;
 100 }
 101
 102 static int demux_avi_read_packet(demuxer_t *demux,demux_stream_t *ds,unsigned int id,unsigned int len,int idxpos,int flags){
 103   avi_priv_t *priv=demux->priv;
 104   int skip;
 105   float pts=0;
 106
 107   mp_dbg(MSGT_DEMUX,MSGL_DBG3,"demux_avi.read_packet: %X\n",id);
 108
 109   if(ds==demux->audio){
 110       if(priv->pts_corrected==0){
 111           if(priv->pts_has_video){
 112               // we have video pts now
 113               float delay=0;
 114               if(((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec)
 115                   delay=(float)priv->pts_corr_bytes/((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec;
 116               mp_msg(MSGT_DEMUX,MSGL_V,"XXX initial  v_pts=%5.3f  a_pos=%d (%5.3f) \n",priv->avi_audio_pts,priv->pts_corr_bytes,delay);
 117               //priv->pts_correction=-priv->avi_audio_pts+delay;
 118               priv->pts_correction=delay-priv->avi_audio_pts;
 119               priv->avi_audio_pts+=priv->pts_correction;
 120               priv->pts_corrected=1;
 121           } else
 122               priv->pts_corr_bytes+=len;
 123       }
 124       if(pts_from_bps){
 125           pts = priv->audio_block_no *
 126             (float)((sh_audio_t*)demux->audio->sh)->audio.dwScale /
 127             (float)((sh_audio_t*)demux->audio->sh)->audio.dwRate;
 128       } else
 129           pts=priv->avi_audio_pts; //+priv->pts_correction;
 130       priv->avi_audio_pts=0;
 131       // update blockcount:
 132       priv->audio_block_no+=priv->audio_block_size ?
 133         ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 134   } else
 135   if(ds==demux->video){
 136      // video
 137      if(priv->skip_video_frames>0){
 138        // drop frame (seeking)
 139        --priv->skip_video_frames;
 140        ds=NULL;
 141      }
 142
 143      pts = priv->avi_video_pts = priv->video_pack_no *
 144          (float)((sh_video_t*)demux->video->sh)->video.dwScale /
 145          (float)((sh_video_t*)demux->video->sh)->video.dwRate;
 146
 147      priv->avi_audio_pts=priv->avi_video_pts+priv->pts_correction;
 148      priv->pts_has_video=1;
 149
 150      if(ds) ++priv->video_pack_no;
 151
 152   }
 153
 154   skip=(len+1)&(~1); // total bytes in this chunk
 155
 156   if(ds){
 157     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_AVI: Read %d data bytes from packet %04X\n",len,id);
 158     ds_read_packet(ds,demux->stream,len,pts,idxpos,flags);
 159     skip-=len;
 160   }
 161   if(skip){
 162     mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id);
 163     stream_skip(demux->stream,skip);
 164   }
 165   return ds?1:0;
 166 }
 167
 168 // return value:
 169 //     0 = EOF or no stream found
 170 //     1 = successfully read a packet
 171 static int demux_avi_fill_buffer(demuxer_t *demux, demux_stream_t *dsds){
 172 avi_priv_t *priv=demux->priv;
 173 unsigned int id=0;
 174 unsigned int len;
 175 int ret=0;
 176 demux_stream_t *ds;
 177
 178 do{
 179   int flags=1;
 180   AVIINDEXENTRY *idx=NULL;
 181   if(priv->idx_size>0 && priv->idx_pos<priv->idx_size){
 182     off_t pos;
 183
 184     idx=&((AVIINDEXENTRY *)priv->idx)[priv->idx_pos++];
 185
 186     if(idx->dwFlags&AVIIF_LIST){
 187       // LIST
 188       continue;
 189     }
 190     if(!demux_avi_select_stream(demux,idx->ckid)){
 191       mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X)  \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
 192       continue; // skip this chunk
 193     }
 194
 195     pos = (off_t)priv->idx_offset+AVI_IDX_OFFSET(idx);
 196     if((pos<demux->movi_start || pos>=demux->movi_end) && (demux->movi_end>demux->movi_start) && (demux->stream->flags & STREAM_SEEK)){
 197       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range!   idx=0x%"PRIX64"  \n",(int64_t)pos);
 198       continue;
 199     }
 200     stream_seek(demux->stream,pos);
 201     demux->filepos=stream_tell(demux->stream);
 202     id=stream_read_dword_le(demux->stream);
 203     if(stream_eof(demux->stream)) return 0; // EOF!
 204
 205     if(id!=idx->ckid){
 206       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkID mismatch! raw=%.4s idx=%.4s  \n",(char *)&id,(char *)&idx->ckid);
 207       if(valid_fourcc(idx->ckid))
 208           id=idx->ckid; // use index if valid
 209       else
 210           if(!valid_fourcc(id)) continue; // drop chunk if both id and idx bad
 211     }
 212     len=stream_read_dword_le(demux->stream);
 213     if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
 214       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkSize mismatch! raw=%d idx=%d  \n",len,idx->dwChunkLength);
 215       if(len>0x200000 && idx->dwChunkLength>0x200000) continue; // both values bad :(
 216       len=choose_chunk_len(idx->dwChunkLength,len);
 217     }
 218     if(!(idx->dwFlags&AVIIF_KEYFRAME)) flags=0;
 219   } else {
 220     demux->filepos=stream_tell(demux->stream);
 221     if(demux->filepos>=demux->movi_end && demux->movi_end>demux->movi_start && (demux->stream->flags & STREAM_SEEK)){
 222           demux->stream->eof=1;
 223           return 0;
 224     }
 225     id=stream_read_dword_le(demux->stream);
 226     len=stream_read_dword_le(demux->stream);
 227     if(stream_eof(demux->stream)) return 0; // EOF!
 228
 229     if(id==mmioFOURCC('L','I','S','T') || id==mmioFOURCC('R', 'I', 'F', 'F')){
 230       id=stream_read_dword_le(demux->stream); // list or RIFF type
 231       continue;
 232     }
 233   }
 234
 235   ds=demux_avi_select_stream(demux,id);
 236   if(ds)
 237     if(ds->packs+1>=MAX_PACKS || ds->bytes+len>=MAX_PACK_BYTES){
 238         // this packet will cause a buffer overflow, switch to -ni mode!!!
 239         mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_SwitchToNi);
 240         if(priv->idx_size>0){
 241             // has index
 242             demux->type=DEMUXER_TYPE_AVI_NI;
 243             demux->desc=&demuxer_desc_avi_ni;
 244             --priv->idx_pos; // hack
 245         } else {
 246             // no index
 247             demux->type=DEMUXER_TYPE_AVI_NINI;
 248             demux->desc=&demuxer_desc_avi_nini;
 249             priv->idx_pos=demux->filepos; // hack
 250         }
 251         priv->idx_pos_v=priv->idx_pos_a=priv->idx_pos;
 252         // quit now, we can't even (no enough buffer memory) read this packet :(
 253         return -1;
 254     }
 255
 256   ret=demux_avi_read_packet(demux,ds,id,len,priv->idx_pos-1,flags);
 257 } while(ret!=1);
 258   return 1;
 259 }
 260
 261
 262 // return value:
 263 //     0 = EOF or no stream found
 264 //     1 = successfully read a packet
 265 int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t* ds){
 266 avi_priv_t *priv=demux->priv;
 267 unsigned int id=0;
 268 unsigned int len;
 269 int ret=0;
 270
 271 do{
 272   int flags=1;
 273   AVIINDEXENTRY *idx=NULL;
 274   int idx_pos=0;
 275   demux->filepos=stream_tell(demux->stream);
 276
 277   if(ds==demux->video) idx_pos=priv->idx_pos_v++; else
 278   if(ds==demux->audio) idx_pos=priv->idx_pos_a++; else
 279                        idx_pos=priv->idx_pos++;
 280
 281   if(priv->idx_size>0 && idx_pos<priv->idx_size){
 282     off_t pos;
 283     idx=&((AVIINDEXENTRY *)priv->idx)[idx_pos];
 284
 285     if(idx->dwFlags&AVIIF_LIST){
 286       // LIST
 287       continue;
 288     }
 289     if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){
 290       mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X)  \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
 291       continue; // skip this chunk
 292     }
 293
 294     pos = priv->idx_offset+AVI_IDX_OFFSET(idx);
 295     if((pos<demux->movi_start || pos>=demux->movi_end) && (demux->movi_end>demux->movi_start)){
 296       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range!  current=0x%"PRIX64"  idx=0x%"PRIX64"  \n",(int64_t)demux->filepos,(int64_t)pos);
 297       continue;
 298     }
 299     stream_seek(demux->stream,pos);
 300
 301     id=stream_read_dword_le(demux->stream);
 302
 303     if(stream_eof(demux->stream)) return 0;
 304
 305     if(id!=idx->ckid){
 306       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkID mismatch! raw=%.4s idx=%.4s  \n",(char *)&id,(char *)&idx->ckid);
 307       if(valid_fourcc(idx->ckid))
 308           id=idx->ckid; // use index if valid
 309       else
 310           if(!valid_fourcc(id)) continue; // drop chunk if both id and idx bad
 311     }
 312     len=stream_read_dword_le(demux->stream);
 313     if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
 314       mp_msg(MSGT_DEMUX,MSGL_V,"ChunkSize mismatch! raw=%d idx=%d  \n",len,idx->dwChunkLength);
 315       if(len>0x200000 && idx->dwChunkLength>0x200000) continue; // both values bad :(
 316       len=choose_chunk_len(idx->dwChunkLength,len);
 317     }
 318     if(!(idx->dwFlags&AVIIF_KEYFRAME)) flags=0;
 319   } else return 0;
 320   ret=demux_avi_read_packet(demux,demux_avi_select_stream(demux,id),id,len,idx_pos,flags);
 321 } while(ret!=1);
 322   return 1;
 323 }
 324
 325
 326 // return value:
 327 //     0 = EOF or no stream found
 328 //     1 = successfully read a packet
 329 int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t* ds){
 330 avi_priv_t *priv=demux->priv;
 331 unsigned int id=0;
 332 unsigned int len;
 333 int ret=0;
 334 off_t *fpos=NULL;
 335
 336   if(ds==demux->video) fpos=&priv->idx_pos_v; else
 337   if(ds==demux->audio) fpos=&priv->idx_pos_a; else
 338   return 0;
 339
 340   stream_seek(demux->stream,fpos[0]);
 341
 342 do{
 343
 344   demux->filepos=stream_tell(demux->stream);
 345   if(demux->filepos>=demux->movi_end && (demux->movi_end>demux->movi_start)){
 346           ds->eof=1;
 347           return 0;
 348   }
 349
 350   id=stream_read_dword_le(demux->stream);
 351   len=stream_read_dword_le(demux->stream);
 352
 353   if(stream_eof(demux->stream)) return 0;
 354
 355   if(id==mmioFOURCC('L','I','S','T')){
 356       id=stream_read_dword_le(demux->stream);      // list type
 357       continue;
 358   }
 359
 360   if(id==mmioFOURCC('R','I','F','F')){
 361       mp_msg(MSGT_DEMUX,MSGL_V,"additional RIFF header...\n");
 362       id=stream_read_dword_le(demux->stream);      // "AVIX"
 363       continue;
 364   }
 365
 366   if(ds==demux_avi_select_stream(demux,id)){
 367     // read it!
 368     ret=demux_avi_read_packet(demux,ds,id,len,priv->idx_pos-1,0);
 369   } else {
 370     // skip it!
 371     int skip=(len+1)&(~1); // total bytes in this chunk
 372     stream_skip(demux->stream,skip);
 373   }
 374
 375 } while(ret!=1);
 376   fpos[0]=stream_tell(demux->stream);
 377   return 1;
 378 }
 379
 380 // AVI demuxer parameters:
 381 int index_mode=-1;  // -1=untouched  0=don't use index  1=use (geneate) index
 382 char *index_file_save = NULL, *index_file_load = NULL;
 383 int force_ni=0;     // force non-interleaved AVI parsing
 384
 385 void read_avi_header(demuxer_t *demuxer,int index_mode);
 386
 387 static demuxer_t* demux_open_avi(demuxer_t* demuxer){
 388     demux_stream_t *d_audio=demuxer->audio;
 389     demux_stream_t *d_video=demuxer->video;
 390     sh_audio_t *sh_audio=NULL;
 391     sh_video_t *sh_video=NULL;
 392     avi_priv_t* priv=malloc(sizeof(avi_priv_t));
 393
 394   // priv struct:
 395   priv->avi_audio_pts=priv->avi_video_pts=0.0f;
 396   priv->pts_correction=0.0f;
 397   priv->skip_video_frames=0;
 398   priv->pts_corr_bytes=0;
 399   priv->pts_has_video=priv->pts_corrected=0;
 400   priv->video_pack_no=0;
 401   priv->audio_block_no=0;
 402   priv->audio_block_size=0;
 403   priv->isodml = 0;
 404   priv->suidx_size = 0;
 405   priv->suidx = NULL;
 406
 407   demuxer->priv=(void*)priv;
 408
 409   //---- AVI header:
 410   read_avi_header(demuxer,(demuxer->stream->flags & STREAM_SEEK_BW)?index_mode:-2);
 411
 412   if(demuxer->audio->id>=0 && !demuxer->a_streams[demuxer->audio->id]){
 413       mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_InvalidAudioStreamNosound,demuxer->audio->id);
 414       demuxer->audio->id=-2; // disabled
 415   }
 416   if(demuxer->video->id>=0 && !demuxer->v_streams[demuxer->video->id]){
 417       mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_InvalidAudioStreamUsingDefault,demuxer->video->id);
 418       demuxer->video->id=-1; // autodetect
 419   }
 420
 421   stream_reset(demuxer->stream);
 422   stream_seek(demuxer->stream,demuxer->movi_start);
 423   priv->idx_pos=0;
 424   priv->idx_pos_a=0;
 425   priv->idx_pos_v=0;
 426   if(priv->idx_size>1){
 427     // decide index format:
 428 #if 1
 429     if((AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start ||
 430         AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[1])<demuxer->movi_start )&& !priv->isodml)
 431       priv->idx_offset=demuxer->movi_start-4;
 432     else
 433       priv->idx_offset=0;
 434 #else
 435     if(AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start)
 436       priv->idx_offset=demuxer->movi_start-4;
 437     else
 438       priv->idx_offset=0;
 439 #endif
 440     mp_msg(MSGT_DEMUX,MSGL_V,"AVI index offset: 0x%X (movi=0x%X idx0=0x%X idx1=0x%X)\n",
 441             (int)priv->idx_offset,(int)demuxer->movi_start,
 442             (int)((AVIINDEXENTRY *)priv->idx)[0].dwChunkOffset,
 443             (int)((AVIINDEXENTRY *)priv->idx)[1].dwChunkOffset);
 444   }
 445
 446   if(priv->idx_size>0){
 447       // check that file is non-interleaved:
 448       int i;
 449       off_t a_pos=-1;
 450       off_t v_pos=-1;
 451       for(i=0;i<priv->idx_size;i++){
 452         AVIINDEXENTRY* idx=&((AVIINDEXENTRY *)priv->idx)[i];
 453         demux_stream_t* ds=demux_avi_select_stream(demuxer,idx->ckid);
 454         off_t pos = priv->idx_offset + AVI_IDX_OFFSET(idx);
 455         if(a_pos==-1 && ds==demuxer->audio){
 456           a_pos=pos;
 457           if(v_pos!=-1) break;
 458         }
 459         if(v_pos==-1 && ds==demuxer->video){
 460           v_pos=pos;
 461           if(a_pos!=-1) break;
 462         }
 463       }
 464       if(v_pos==-1){
 465         mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI_NI: " MSGTR_MissingVideoStream);
 466         return NULL;
 467       }
 468       if(a_pos==-1){
 469         d_audio->sh=sh_audio=NULL;
 470       } else {
 471         if(force_ni || abs(a_pos-v_pos)>0x100000){  // distance > 1MB
 472           mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_NI_Message,force_ni?MSGTR_NI_Forced:MSGTR_NI_Detected);
 473           demuxer->type=DEMUXER_TYPE_AVI_NI; // HACK!!!!
 474           demuxer->desc=&demuxer_desc_avi_ni; // HACK!!!!
 475           pts_from_bps=1; // force BPS sync!
 476         }
 477       }
 478   } else {
 479       // no index
 480       if(force_ni){
 481           mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_UsingNINI);
 482           demuxer->type=DEMUXER_TYPE_AVI_NINI; // HACK!!!!
 483           demuxer->desc=&demuxer_desc_avi_nini; // HACK!!!!
 484           priv->idx_pos_a=
 485           priv->idx_pos_v=demuxer->movi_start;
 486           pts_from_bps=1; // force BPS sync!
 487       }
 488       demuxer->seekable=0;
 489   }
 490   if(!ds_fill_buffer(d_video)){
 491     mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI: " MSGTR_MissingVideoStreamBug);
 492     return NULL;
 493   }
 494   sh_video=d_video->sh;sh_video->ds=d_video;
 495   if(d_audio->id!=-2){
 496     mp_msg(MSGT_DEMUX,MSGL_V,"AVI: Searching for audio stream (id:%d)\n",d_audio->id);
 497     if(!priv->audio_streams || !ds_fill_buffer(d_audio)){
 498       mp_msg(MSGT_DEMUX,MSGL_INFO,"AVI: " MSGTR_MissingAudioStream);
 499       d_audio->sh=sh_audio=NULL;
 500     } else {
 501       sh_audio=d_audio->sh;sh_audio->ds=d_audio;
 502     }
 503   }
 504
 505   // calculating audio/video bitrate:
 506   if(priv->idx_size>0){
 507     // we have index, let's count 'em!
 508     int64_t vsize=0;
 509     int64_t asize=0;
 510     size_t vsamples=0;
 511     size_t asamples=0;
 512     int i;
 513     for(i=0;i<priv->idx_size;i++){
 514       int id=avi_stream_id(((AVIINDEXENTRY *)priv->idx)[i].ckid);
 515       int len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 516       if(sh_video->ds->id == id) {
 517         vsize+=len;
 518         ++vsamples;
 519       }
 520       else if(sh_audio && sh_audio->ds->id == id) {
 521         asize+=len;
 522         asamples+=(len+priv->audio_block_size-1)/priv->audio_block_size;
 523       }
 524     }
 525     mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u) audio size=%"PRId64" (%u)\n",vsize,vsamples,asize,asamples);
 526     priv->numberofframes=vsamples;
 527     sh_video->i_bps=((float)vsize/(float)vsamples)*(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
 528     if(sh_audio) sh_audio->i_bps=((float)asize/(float)asamples)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 529   } else {
 530     // guessing, results may be inaccurate:
 531     int64_t vsize;
 532     int64_t asize=0;
 533
 534     if((priv->numberofframes=sh_video->video.dwLength)<=1)
 535       // bad video header, try to get number of frames from audio
 536       if(sh_audio && sh_audio->wf->nAvgBytesPerSec) priv->numberofframes=sh_video->fps*sh_audio->audio.dwLength/sh_audio->audio.dwRate*sh_audio->audio.dwScale;
 537     if(priv->numberofframes<=1){
 538       mp_msg(MSGT_SEEK,MSGL_WARN,MSGTR_CouldntDetFNo);
 539       priv->numberofframes=0;
 540     }
 541
 542     if(sh_audio){
 543       if(sh_audio->wf->nAvgBytesPerSec && sh_audio->audio.dwSampleSize!=1){
 544         asize=(float)sh_audio->wf->nAvgBytesPerSec*sh_audio->audio.dwLength*sh_audio->audio.dwScale/sh_audio->audio.dwRate;
 545       } else {
 546         asize=sh_audio->audio.dwLength;
 547         sh_audio->i_bps=(float)asize/(sh_video->frametime*priv->numberofframes);
 548       }
 549     }
 550     vsize=demuxer->movi_end-demuxer->movi_start-asize-8*priv->numberofframes;
 551     mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u)  audio size=%"PRId64"\n",vsize,priv->numberofframes,asize);
 552     sh_video->i_bps=(float)vsize/(sh_video->frametime*priv->numberofframes);
 553   }
 554
 555   return demuxer;
 556
 557 }
 558
 559
 560 void demux_seek_avi(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
 561     avi_priv_t *priv=demuxer->priv;
 562     demux_stream_t *d_audio=demuxer->audio;
 563     demux_stream_t *d_video=demuxer->video;
 564     sh_audio_t *sh_audio=d_audio->sh;
 565     sh_video_t *sh_video=d_video->sh;
 566     float skip_audio_secs=0;
 567
 568   //FIXME: OFF_T - Didn't check AVI case yet (avi files can't be >2G anyway?)
 569   //================= seek in AVI ==========================
 570     int rel_seek_frames=rel_seek_secs*sh_video->fps;
 571     int video_chunk_pos=d_video->pos;
 572     int i;
 573
 574       if(flags&1){
 575         // seek absolute
 576         video_chunk_pos=0;
 577       }
 578
 579       if(flags&2){
 580         rel_seek_frames=rel_seek_secs*priv->numberofframes;
 581       }
 582
 583       priv->skip_video_frames=0;
 584       priv->avi_audio_pts=0;
 585
 586 // ------------ STEP 1: find nearest video keyframe chunk ------------
 587       // find nearest video keyframe chunk pos:
 588       if(rel_seek_frames>0){
 589         // seek forward
 590         while(video_chunk_pos<priv->idx_size-1){
 591           int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid;
 592           if(avi_stream_id(id)==d_video->id){  // video frame
 593             if((--rel_seek_frames)<0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
 594           }
 595           ++video_chunk_pos;
 596         }
 597       } else {
 598         // seek backward
 599         while(video_chunk_pos>0){
 600           int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid;
 601           if(avi_stream_id(id)==d_video->id){  // video frame
 602             if((++rel_seek_frames)>0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
 603           }
 604           --video_chunk_pos;
 605         }
 606       }
 607       priv->idx_pos_a=priv->idx_pos_v=priv->idx_pos=video_chunk_pos;
 608
 609       // re-calc video pts:
 610       d_video->pack_no=0;
 611       for(i=0;i<video_chunk_pos;i++){
 612           int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 613           if(avi_stream_id(id)==d_video->id) ++d_video->pack_no;
 614       }
 615       priv->video_pack_no=
 616       sh_video->num_frames=sh_video->num_frames_decoded=d_video->pack_no;
 617       priv->avi_video_pts=d_video->pack_no*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
 618       d_video->pos=video_chunk_pos;
 619
 620       mp_msg(MSGT_SEEK,MSGL_DBG2,"V_SEEK:  pack=%d  pts=%5.3f  chunk=%d  \n",d_video->pack_no,priv->avi_video_pts,video_chunk_pos);
 621
 622 // ------------ STEP 2: seek audio, find the right chunk & pos ------------
 623
 624       d_audio->pack_no=0;
 625       priv->audio_block_no=0;
 626       d_audio->dpos=0;
 627
 628       if(sh_audio){
 629         int i;
 630         int len=0;
 631         int skip_audio_bytes=0;
 632         int curr_audio_pos=-1;
 633         int audio_chunk_pos=-1;
 634         int chunk_max=(demuxer->type==DEMUXER_TYPE_AVI)?video_chunk_pos:priv->idx_size;
 635
 636         if(sh_audio->audio.dwSampleSize){
 637             // constant rate audio stream
 638             /* immediate seeking to audio position, including when streams are delayed */
 639             curr_audio_pos=(priv->avi_video_pts + audio_delay)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 640             curr_audio_pos*=sh_audio->audio.dwSampleSize;
 641
 642         // find audio chunk pos:
 643           for(i=0;i<chunk_max;i++){
 644             int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 645             if(avi_stream_id(id)==d_audio->id){
 646                 len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 647                 if(d_audio->dpos<=curr_audio_pos && curr_audio_pos<(d_audio->dpos+len)){
 648                   break;
 649                 }
 650                 ++d_audio->pack_no;
 651                 priv->audio_block_no+=priv->audio_block_size ?
 652                     ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 653                 d_audio->dpos+=len;
 654             }
 655           }
 656           audio_chunk_pos=i;
 657           skip_audio_bytes=curr_audio_pos-d_audio->dpos;
 658
 659           mp_msg(MSGT_SEEK,MSGL_V,"SEEK: i=%d (max:%d) dpos=%d (wanted:%d)  \n",
 660               i,chunk_max,(int)d_audio->dpos,curr_audio_pos);
 661
 662         } else {
 663             // VBR audio
 664             /* immediate seeking to audio position, including when streams are delayed */
 665             int chunks=(priv->avi_video_pts + audio_delay)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
 666             audio_chunk_pos=0;
 667
 668         // find audio chunk pos:
 669           for(i=0;i<priv->idx_size && chunks>0;i++){
 670             int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 671             if(avi_stream_id(id)==d_audio->id){
 672                 len=((AVIINDEXENTRY *)priv->idx)[i].dwChunkLength;
 673                 if(i>chunk_max){
 674                   skip_audio_bytes+=len;
 675                 } else {
 676                   ++d_audio->pack_no;
 677                   priv->audio_block_no+=priv->audio_block_size ?
 678                     ((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
 679                   d_audio->dpos+=len;
 680                   audio_chunk_pos=i;
 681                 }
 682                 if(priv->audio_block_size)
 683                     chunks-=(len+priv->audio_block_size-1)/priv->audio_block_size;
 684             }
 685           }
 686         }
 687
 688         // Now we have:
 689         //      audio_chunk_pos = chunk no in index table (it's <=chunk_max)
 690         //      skip_audio_bytes = bytes to be skipped after chunk seek
 691         //      d-audio->pack_no = chunk_no in stream at audio_chunk_pos
 692         //      d_audio->dpos = bytepos in stream at audio_chunk_pos
 693         // let's seek!
 694
 695           // update stream position:
 696           d_audio->pos=audio_chunk_pos;
 697
 698         if(demuxer->type==DEMUXER_TYPE_AVI){
 699           // interleaved stream:
 700           if(audio_chunk_pos<video_chunk_pos){
 701             // calc priv->skip_video_frames & adjust video pts counter:
 702             for(i=audio_chunk_pos;i<video_chunk_pos;i++){
 703               int id=((AVIINDEXENTRY *)priv->idx)[i].ckid;
 704               if(avi_stream_id(id)==d_video->id) ++priv->skip_video_frames;
 705             }
 706             // requires for correct audio pts calculation (demuxer):
 707             priv->avi_video_pts-=priv->skip_video_frames*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
 708             priv->avi_audio_pts=priv->avi_video_pts;
 709             // set index position:
 710             priv->idx_pos_a=priv->idx_pos_v=priv->idx_pos=audio_chunk_pos;
 711           }
 712         } else {
 713             // non-interleaved stream:
 714             priv->idx_pos_a=audio_chunk_pos;
 715             priv->idx_pos_v=video_chunk_pos;
 716             priv->idx_pos=(audio_chunk_pos<video_chunk_pos)?audio_chunk_pos:video_chunk_pos;
 717         }
 718
 719           mp_msg(MSGT_SEEK,MSGL_V,"SEEK: idx=%d  (a:%d v:%d)  v.skip=%d  a.skip=%d/%4.3f  \n",
 720             (int)priv->idx_pos,audio_chunk_pos,video_chunk_pos,
 721             (int)priv->skip_video_frames,skip_audio_bytes,skip_audio_secs);
 722
 723           if(skip_audio_bytes){
 724             demux_read_data(d_audio,NULL,skip_audio_bytes);
 725           }
 726
 727       }
 728         d_video->pts=priv->avi_video_pts; // OSD
 729
 730 }
 731
 732
 733 void demux_close_avi(demuxer_t *demuxer) {
 734   avi_priv_t* priv=demuxer->priv;
 735
 736   if(!priv)
 737     return;
 738
 739   if(priv->idx_size > 0)
 740     free(priv->idx);
 741   free(priv);
 742 }
 743
 744
 745 static int demux_avi_control(demuxer_t *demuxer,int cmd, void *arg){
 746     avi_priv_t *priv=demuxer->priv;
 747     demux_stream_t *d_video=demuxer->video;
 748     sh_video_t *sh_video=d_video->sh;
 749
 750     switch(cmd) {
 751         case DEMUXER_CTRL_GET_TIME_LENGTH:
 752             if (!priv->numberofframes || !sh_video) return DEMUXER_CTRL_DONTKNOW;
 753             *((double *)arg)=(double)priv->numberofframes/sh_video->fps;
 754             if (sh_video->video.dwLength<=1) return DEMUXER_CTRL_GUESS;
 755             return DEMUXER_CTRL_OK;
 756
 757         case DEMUXER_CTRL_GET_PERCENT_POS:
 758             if (!priv->numberofframes || !sh_video) {
 759               return DEMUXER_CTRL_DONTKNOW;
 760             }
 761             *((int *)arg)=(int)(priv->video_pack_no*100/priv->numberofframes);
 762             if (sh_video->video.dwLength<=1) return DEMUXER_CTRL_GUESS;
 763             return DEMUXER_CTRL_OK;
 764
 765         case DEMUXER_CTRL_SWITCH_AUDIO:
 766         case DEMUXER_CTRL_SWITCH_VIDEO: {
 767             int audio = (cmd == DEMUXER_CTRL_SWITCH_AUDIO);
 768             demux_stream_t *ds = audio ? demuxer->audio : demuxer->video;
 769             void **streams = audio ? demuxer->a_streams : demuxer->v_streams;
 770             int maxid = FFMIN(100, audio ? MAX_A_STREAMS : MAX_V_STREAMS);
 771             int chunkid;
 772             if (ds->id < -1)
 773               return DEMUXER_CTRL_NOTIMPL;
 774
 775             if (*(int *)arg >= 0)
 776               ds->id = *(int *)arg;
 777             else {
 778               int i;
 779               for (i = 0; i < maxid; i++) {
 780                 if (++ds->id >= maxid) ds->id = 0;
 781                 if (streams[ds->id]) break;
 782               }
 783             }
 784
 785             chunkid = (ds->id / 10 + '0') | (ds->id % 10 + '0') << 8;
 786             ds->sh = NULL;
 787             if (!streams[ds->id]) // stream not available
 788               ds->id = -1;
 789             else
 790               demux_avi_select_stream(demuxer, chunkid);
 791             *(int *)arg = ds->id;
 792             return DEMUXER_CTRL_OK;
 793         }
 794
 795         default:
 796             return DEMUXER_CTRL_NOTIMPL;
 797     }
 798 }
 799
 800
 801 static int avi_check_file(demuxer_t *demuxer)
 802 {
 803   int id=stream_read_dword_le(demuxer->stream); // "RIFF"
 804
 805   if((id==mmioFOURCC('R','I','F','F')) || (id==mmioFOURCC('O','N','2',' '))) {
 806     stream_read_dword_le(demuxer->stream); //filesize
 807     id=stream_read_dword_le(demuxer->stream); // "AVI "
 808     if(id==formtypeAVI)
 809       return DEMUXER_TYPE_AVI;
 810     if(id==mmioFOURCC('O','N','2','f')){
 811       mp_msg(MSGT_DEMUXER,MSGL_INFO,MSGTR_ON2AviFormat);
 812       return DEMUXER_TYPE_AVI;
 813     }
 814   }
 815
 816   return 0;
 817 }
 818
 819
 820 static demuxer_t* demux_open_hack_avi(demuxer_t *demuxer)
 821 {
 822    sh_audio_t* sh_a;
 823
 824    demuxer = (demuxer_t*) demux_open_avi(demuxer);
 825    if(!demuxer) return NULL; // failed to open
 826    sh_a = (sh_audio_t*)demuxer->audio->sh;
 827    if(demuxer->audio->id != -2 && sh_a) {
 828 #ifdef HAVE_OGGVORBIS
 829     // support for Ogg-in-AVI:
 830     if(sh_a->format == 0xFFFE)
 831       demuxer = init_avi_with_ogg(demuxer);
 832     else if(sh_a->format == 0x674F) {
 833       stream_t* s;
 834       demuxer_t  *od;
 835       s = new_ds_stream(demuxer->audio);
 836       od = new_demuxer(s,DEMUXER_TYPE_OGG,-1,-2,-2,NULL);
 837       if(!demux_ogg_open(od)) {
 838         mp_msg( MSGT_DEMUXER,MSGL_ERR,MSGTR_ErrorOpeningOGGDemuxer);
 839         free_stream(s);
 840         demuxer->audio->id = -2;
 841       } else
 842         demuxer = new_demuxers_demuxer(demuxer,od,demuxer);
 843    }
 844 #endif
 845    }
 846
 847    return demuxer;
 848 }
 849
 850
 851 demuxer_desc_t demuxer_desc_avi = {
 852   "AVI demuxer",
 853   "avi",
 854   "AVI",
 855   "Arpi?",
 856   "AVI files, including non interleaved files",
 857   DEMUXER_TYPE_AVI,
 858   1, // safe autodetect
 859   avi_check_file,
 860   demux_avi_fill_buffer,
 861   demux_open_hack_avi,
 862   demux_close_avi,
 863   demux_seek_avi,
 864   demux_avi_control
 865 };
 866
 867 demuxer_desc_t demuxer_desc_avi_ni = {
 868   "AVI demuxer, non-interleaved",
 869   "avini",
 870   "AVI",
 871   "Arpi?",
 872   "AVI files, including non interleaved files",
 873   DEMUXER_TYPE_AVI,
 874   1, // safe autodetect
 875   avi_check_file,
 876   demux_avi_fill_buffer_ni,
 877   demux_open_hack_avi,
 878   demux_close_avi,
 879   demux_seek_avi,
 880   demux_avi_control
 881 };
 882
 883 demuxer_desc_t demuxer_desc_avi_nini = {
 884   "AVI demuxer, non-interleaved and no index",
 885   "avinini",
 886   "AVI",
 887   "Arpi?",
 888   "AVI files, including non interleaved files",
 889   DEMUXER_TYPE_AVI,
 890   1, // safe autodetect
 891   avi_check_file,
 892   demux_avi_fill_buffer_nini,
 893   demux_open_hack_avi,
 894   demux_close_avi,
 895   demux_seek_avi,
 896   demux_avi_control
 897 };