git.sesse.net Git - vlc/blob - modules/demux/avi/avi.c

   1 /*****************************************************************************
   2  * avi.c : AVI file Stream input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 the VideoLAN team
   5  * $Id$
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc_demux.h>
  33
  34 #include <vlc_interface.h>
  35
  36 #include <vlc_meta.h>
  37 #include <vlc_codecs.h>
  38 #include <vlc_charset.h>
  39
  40 #include "libavi.h"
  41
  42 /*****************************************************************************
  43  * Module descriptor
  44  *****************************************************************************/
  45
  46 #define INTERLEAVE_TEXT N_("Force interleaved method" )
  47 #define INTERLEAVE_LONGTEXT N_( "Force interleaved method." )
  48
  49 #define INDEX_TEXT N_("Force index creation")
  50 #define INDEX_LONGTEXT N_( \
  51     "Recreate a index for the AVI file. Use this if your AVI file is damaged "\
  52     "or incomplete (not seekable)." )
  53
  54 static int  Open ( vlc_object_t * );
  55 static void Close( vlc_object_t * );
  56
  57 static int pi_index[] = {0,1,2};
  58
  59 static const char *ppsz_indexes[] = { N_("Ask"), N_("Always fix"),
  60                                 N_("Never fix") };
  61
  62 vlc_module_begin();
  63     set_shortname( "AVI" );
  64     set_description( _("AVI demuxer") );
  65     set_capability( "demux2", 212 );
  66     set_category( CAT_INPUT );
  67     set_subcategory( SUBCAT_INPUT_DEMUX );
  68
  69     add_bool( "avi-interleaved", 0, NULL,
  70               INTERLEAVE_TEXT, INTERLEAVE_LONGTEXT, VLC_TRUE );
  71     add_integer( "avi-index", 0, NULL,
  72               INDEX_TEXT, INDEX_LONGTEXT, VLC_FALSE );
  73         change_integer_list( pi_index, ppsz_indexes, 0 );
  74
  75     set_callbacks( Open, Close );
  76 vlc_module_end();
  77
  78 /*****************************************************************************
  79  * Local prototypes
  80  *****************************************************************************/
  81 static int Control         ( demux_t *, int, va_list );
  82 static int Seek            ( demux_t *, mtime_t, int );
  83 static int Demux_Seekable  ( demux_t * );
  84 static int Demux_UnSeekable( demux_t * );
  85
  86 #define __ABS( x ) ( (x) < 0 ? (-(x)) : (x) )
  87
  88 typedef struct
  89 {
  90     vlc_fourcc_t i_fourcc;
  91     off_t        i_pos;
  92     uint32_t     i_size;
  93     vlc_fourcc_t i_type;     /* only for AVIFOURCC_LIST */
  94
  95     uint8_t      i_peek[8];  /* first 8 bytes */
  96
  97     unsigned int i_stream;
  98     unsigned int i_cat;
  99 } avi_packet_t;
 100
 101
 102 typedef struct
 103 {
 104     vlc_fourcc_t i_id;
 105     uint32_t     i_flags;
 106     off_t        i_pos;
 107     uint32_t     i_length;
 108     uint32_t     i_lengthtotal;
 109
 110 } avi_entry_t;
 111
 112 typedef struct
 113 {
 114     vlc_bool_t      b_activated;
 115
 116     unsigned int    i_cat; /* AUDIO_ES, VIDEO_ES */
 117     vlc_fourcc_t    i_codec;
 118
 119     int             i_rate;
 120     int             i_scale;
 121     int             i_samplesize;
 122
 123     es_out_id_t     *p_es;
 124
 125     /* Avi Index */
 126     avi_entry_t     *p_index;
 127     unsigned int    i_idxnb;
 128     unsigned int    i_idxmax;
 129
 130     unsigned int    i_idxposc;  /* numero of chunk */
 131     unsigned int    i_idxposb;  /* byte in the current chunk */
 132
 133     /* For VBR audio only */
 134     unsigned int    i_blockno;
 135     unsigned int    i_blocksize;
 136
 137     /* For muxed streams */
 138     stream_t        *p_out_muxed;
 139 } avi_track_t;
 140
 141 struct demux_sys_t
 142 {
 143     mtime_t i_time;
 144     mtime_t i_length;
 145
 146     vlc_bool_t  b_seekable;
 147     vlc_bool_t  b_muxed;
 148     avi_chunk_t ck_root;
 149
 150     vlc_bool_t  b_odml;
 151
 152     off_t   i_movi_begin;
 153     off_t   i_movi_lastchunk_pos;   /* XXX position of last valid chunk */
 154
 155     /* number of streams and information */
 156     unsigned int i_track;
 157     avi_track_t  **track;
 158
 159     /* meta */
 160     vlc_meta_t  *meta;
 161
 162     /* Progress box */
 163     mtime_t    last_update;
 164     int        i_dialog_id;
 165 };
 166
 167 static inline off_t __EVEN( off_t i )
 168 {
 169     return (i & 1) ? i + 1 : i;
 170 }
 171
 172 static mtime_t AVI_PTSToChunk( avi_track_t *, mtime_t i_pts );
 173 static mtime_t AVI_PTSToByte ( avi_track_t *, mtime_t i_pts );
 174 static mtime_t AVI_GetDPTS   ( avi_track_t *, int64_t i_count );
 175 static mtime_t AVI_GetPTS    ( avi_track_t * );
 176
 177
 178 static int AVI_StreamChunkFind( demux_t *, unsigned int i_stream );
 179 static int AVI_StreamChunkSet ( demux_t *,
 180                                 unsigned int i_stream, unsigned int i_ck );
 181 static int AVI_StreamBytesSet ( demux_t *,
 182                                 unsigned int i_stream, off_t   i_byte );
 183
 184 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t );
 185 static int   AVI_GetKeyFlag    ( vlc_fourcc_t , uint8_t * );
 186
 187 static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk );
 188 static int AVI_PacketNext     ( demux_t * );
 189 static int AVI_PacketRead     ( demux_t *, avi_packet_t *, block_t **);
 190 static int AVI_PacketSearch   ( demux_t * );
 191
 192 static void AVI_IndexLoad    ( demux_t * );
 193 static void AVI_IndexCreate  ( demux_t * );
 194 static void AVI_IndexAddEntry( demux_sys_t *, int, avi_entry_t * );
 195
 196 static mtime_t  AVI_MovieGetLength( demux_t * );
 197
 198 /*****************************************************************************
 199  * Stream management
 200  *****************************************************************************/
 201 static int        AVI_TrackSeek  ( demux_t *, int, mtime_t );
 202 static int        AVI_TrackStopFinishedStreams( demux_t *);
 203
 204 /* Remarks:
 205  - For VBR mp3 stream:
 206     count blocks by rounded-up chunksizes instead of chunks
 207     we need full emulation of dshow avi demuxer bugs :(
 208     fixes silly nandub-style a-v delaying in avi with vbr mp3...
 209     (from mplayer 2002/08/02)
 210  - to complete....
 211  */
 212
 213 /*****************************************************************************
 214  * Open: check file and initializes AVI structures
 215  *****************************************************************************/
 216 static int Open( vlc_object_t * p_this )
 217 {
 218     demux_t  *p_demux = (demux_t *)p_this;
 219     demux_sys_t     *p_sys;
 220
 221     vlc_bool_t       b_index = VLC_FALSE;
 222     int              i_do_index;
 223
 224     avi_chunk_t         ck_riff;
 225     avi_chunk_list_t    *p_riff = (avi_chunk_list_t*)&ck_riff;
 226     avi_chunk_list_t    *p_hdrl, *p_movi;
 227     avi_chunk_avih_t    *p_avih;
 228
 229     unsigned int i_track;
 230     unsigned int i, i_peeker;
 231
 232     const uint8_t *p_peek;
 233
 234     /* Is it an avi file ? */
 235     if( stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC;
 236
 237     for( i_peeker = 0; i_peeker < 188; i_peeker++ )
 238     {
 239         if( !strncmp( (char *)&p_peek[0], "RIFF", 4 ) && !strncmp( (char *)&p_peek[8], "AVI ", 4 ) )
 240             break;
 241         if( !strncmp( (char *)&p_peek[0], "ON2 ", 4 ) && !strncmp( (char *)&p_peek[8], "ON2f", 4 ) )
 242             break;
 243         p_peek++;
 244     }
 245     if( i_peeker == 188 )
 246     {
 247         return VLC_EGENERIC;
 248     }
 249
 250     /* Initialize input  structures. */
 251     p_sys = p_demux->p_sys = malloc( sizeof(demux_sys_t) );
 252     memset( p_sys, 0, sizeof( demux_sys_t ) );
 253     p_sys->i_time   = 0;
 254     p_sys->i_length = 0;
 255     p_sys->i_movi_lastchunk_pos = 0;
 256     p_sys->b_odml   = VLC_FALSE;
 257     p_sys->b_muxed  = VLC_FALSE;
 258     p_sys->i_track  = 0;
 259     p_sys->track    = NULL;
 260     p_sys->meta     = NULL;
 261
 262     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_seekable );
 263
 264     p_demux->pf_control = Control;
 265     p_demux->pf_demux = Demux_Seekable;
 266
 267     /* For unseekable stream, automaticaly use Demux_UnSeekable */
 268     if( !p_sys->b_seekable || config_GetInt( p_demux, "avi-interleaved" ) )
 269     {
 270         p_demux->pf_demux = Demux_UnSeekable;
 271     }
 272
 273     if( i_peeker > 0 )
 274     {
 275         stream_Read( p_demux->s, NULL, i_peeker );
 276     }
 277
 278     if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) )
 279     {
 280         msg_Err( p_demux, "avi module discarded (invalid file)" );
 281         return VLC_EGENERIC;
 282     }
 283
 284     if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF ) > 1 )
 285     {
 286         unsigned int i_count =
 287             AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF );
 288
 289         msg_Warn( p_demux, "multiple riff -> OpenDML ?" );
 290         for( i = 1; i < i_count; i++ )
 291         {
 292             avi_chunk_list_t *p_sysx;
 293
 294             p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i );
 295             if( p_sysx->i_type == AVIFOURCC_AVIX )
 296             {
 297                 msg_Warn( p_demux, "detected OpenDML file" );
 298                 p_sys->b_odml = VLC_TRUE;
 299                 break;
 300             }
 301         }
 302     }
 303
 304     p_riff  = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0 );
 305     p_hdrl  = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
 306     p_movi  = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0 );
 307
 308     if( !p_hdrl || !p_movi )
 309     {
 310         msg_Err( p_demux, "avi module discarded (invalid file)" );
 311         goto error;
 312     }
 313
 314     if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0 ) ) )
 315     {
 316         msg_Err( p_demux, "cannot find avih chunk" );
 317         goto error;
 318     }
 319     i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl );
 320     if( p_avih->i_streams != i_track )
 321     {
 322         msg_Warn( p_demux,
 323                   "found %d stream but %d are declared",
 324                   i_track, p_avih->i_streams );
 325     }
 326     if( i_track == 0 )
 327     {
 328         msg_Err( p_demux, "no stream defined!" );
 329         goto error;
 330     }
 331
 332     /* print information on streams */
 333     msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ",
 334              i_track,
 335              p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 336              p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 337              p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 338              p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 339     if( ( p_sys->meta = vlc_meta_New() ) )
 340     {
 341         char buffer[200];
 342         sprintf( buffer, "%s%s%s%s",
 343                  p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 344                  p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 345                  p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 346                  p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 347         vlc_meta_SetSetting( p_sys->meta, buffer );
 348     }
 349
 350     /* now read info on each stream and create ES */
 351     for( i = 0 ; i < i_track; i++ )
 352     {
 353         avi_track_t           *tk     = malloc( sizeof( avi_track_t ) );
 354         avi_chunk_list_t      *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 355         avi_chunk_strh_t      *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 356         avi_chunk_STRING_t    *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0 );
 357         avi_chunk_strf_auds_t *p_auds = NULL;
 358         avi_chunk_strf_vids_t *p_vids = NULL;
 359         es_format_t fmt;
 360
 361         tk->b_activated = VLC_FALSE;
 362         tk->p_index     = 0;
 363         tk->i_idxnb     = 0;
 364         tk->i_idxmax    = 0;
 365         tk->i_idxposc   = 0;
 366         tk->i_idxposb   = 0;
 367
 368         tk->i_blockno   = 0;
 369         tk->i_blocksize = 0;
 370
 371         tk->p_es        = NULL;
 372         tk->p_out_muxed = NULL;
 373
 374         p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 375         p_auds = (avi_chunk_strf_auds_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 376
 377         if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
 378         {
 379             msg_Warn( p_demux, "stream[%d] incomplete", i );
 380             continue;
 381         }
 382
 383         tk->i_rate  = p_strh->i_rate;
 384         tk->i_scale = p_strh->i_scale;
 385         tk->i_samplesize = p_strh->i_samplesize;
 386         msg_Dbg( p_demux, "stream[%d] rate:%d scale:%d samplesize:%d",
 387                  i, tk->i_rate, tk->i_scale, tk->i_samplesize );
 388
 389         switch( p_strh->i_type )
 390         {
 391             case( AVIFOURCC_auds ):
 392                 tk->i_cat   = AUDIO_ES;
 393                 tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
 394                                                   p_auds->p_wf->wFormatTag );
 395                 if( ( tk->i_blocksize = p_auds->p_wf->nBlockAlign ) == 0 )
 396                 {
 397                     if( p_auds->p_wf->wFormatTag == 1 )
 398                     {
 399                         tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
 400                     }
 401                     else
 402                     {
 403                         tk->i_blocksize = 1;
 404                     }
 405                 }
 406                 es_format_Init( &fmt, AUDIO_ES, tk->i_codec );
 407
 408                 fmt.audio.i_channels        = p_auds->p_wf->nChannels;
 409                 fmt.audio.i_rate            = p_auds->p_wf->nSamplesPerSec;
 410                 fmt.i_bitrate               = p_auds->p_wf->nAvgBytesPerSec*8;
 411                 fmt.audio.i_blockalign      = p_auds->p_wf->nBlockAlign;
 412                 fmt.audio.i_bitspersample   = p_auds->p_wf->wBitsPerSample;
 413                 fmt.b_packetized            = !tk->i_blocksize;
 414                 fmt.i_extra = __MIN( p_auds->p_wf->cbSize,
 415                     p_auds->i_chunk_size - sizeof(WAVEFORMATEX) );
 416                 fmt.p_extra = &p_auds->p_wf[1];
 417                 msg_Dbg( p_demux, "stream[%d] audio(0x%x) %d channels %dHz %dbits",
 418                          i, p_auds->p_wf->wFormatTag, p_auds->p_wf->nChannels,
 419                          p_auds->p_wf->nSamplesPerSec, p_auds->p_wf->wBitsPerSample);
 420                 break;
 421
 422             case( AVIFOURCC_vids ):
 423                 tk->i_cat   = VIDEO_ES;
 424                 tk->i_codec = AVI_FourccGetCodec( VIDEO_ES,
 425                                                   p_vids->p_bih->biCompression );
 426                 if( p_vids->p_bih->biCompression == 0x00 )
 427                 {
 428                     switch( p_vids->p_bih->biBitCount )
 429                     {
 430                         case 32:
 431                             tk->i_codec = VLC_FOURCC('R','V','3','2');
 432                             break;
 433                         case 24:
 434                             tk->i_codec = VLC_FOURCC('R','V','2','4');
 435                             break;
 436                         case 16:
 437                             /* tk->i_codec = VLC_FOURCC('R','V','1','6');*/
 438                             /* break;*/
 439                         case 15:
 440                             tk->i_codec = VLC_FOURCC('R','V','1','5');
 441                             break;
 442                         case 9:
 443                             tk->i_codec = VLC_FOURCC( 'Y', 'V', 'U', '9' ); /* <- TODO check that */
 444                             break;
 445                         case 8:
 446                             tk->i_codec = VLC_FOURCC('Y','8','0','0');
 447                             break;
 448                     }
 449                     es_format_Init( &fmt, VIDEO_ES, tk->i_codec );
 450
 451                     if( p_vids->p_bih->biBitCount == 24 )
 452                     {
 453                         /* This is in BGR format */
 454                         fmt.video.i_bmask = 0x00ff0000;
 455                         fmt.video.i_gmask = 0x0000ff00;
 456                         fmt.video.i_rmask = 0x000000ff;
 457                     }
 458                 }
 459                 else
 460                 {
 461                     es_format_Init( &fmt, VIDEO_ES, p_vids->p_bih->biCompression );
 462                     if( tk->i_codec == FOURCC_mp4v &&
 463                         !strncasecmp( (char*)&p_strh->i_handler, "XVID", 4 ) )
 464                     {
 465                         fmt.i_codec = VLC_FOURCC( 'X', 'V', 'I', 'D' );
 466                     }
 467                 }
 468                 tk->i_samplesize = 0;
 469                 fmt.video.i_width  = p_vids->p_bih->biWidth;
 470                 fmt.video.i_height = p_vids->p_bih->biHeight;
 471                 fmt.video.i_bits_per_pixel = p_vids->p_bih->biBitCount;
 472                 fmt.video.i_frame_rate = tk->i_rate;
 473                 fmt.video.i_frame_rate_base = tk->i_scale;
 474                 fmt.i_extra =
 475                     __MIN( p_vids->p_bih->biSize - sizeof( BITMAPINFOHEADER ),
 476                            p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER) );
 477                 fmt.p_extra = &p_vids->p_bih[1];
 478                 msg_Dbg( p_demux, "stream[%d] video(%4.4s) %dx%d %dbpp %ffps",
 479                          i, (char*)&p_vids->p_bih->biCompression,
 480                          p_vids->p_bih->biWidth,
 481                          p_vids->p_bih->biHeight,
 482                          p_vids->p_bih->biBitCount,
 483                          (float)tk->i_rate/(float)tk->i_scale );
 484
 485                 if( p_vids->p_bih->biCompression == 0x00 )
 486                 {
 487                     /* RGB DIB are coded from bottom to top */
 488                     fmt.video.i_height =
 489                         (unsigned int)(-(int)p_vids->p_bih->biHeight);
 490                 }
 491
 492                 /* Extract palette from extradata if bpp <= 8
 493                  * (assumes that extradata contains only palette but appears
 494                  *  to be true for all palettized codecs we support) */
 495                 if( fmt.i_extra && fmt.video.i_bits_per_pixel <= 8 &&
 496                     fmt.video.i_bits_per_pixel > 0 )
 497                 {
 498                     int i;
 499
 500                     fmt.video.p_palette = calloc( sizeof(video_palette_t), 1 );
 501                     fmt.video.p_palette->i_entries = 1;
 502
 503                     /* Apparently this is necessary. But why ? */
 504                     fmt.i_extra =
 505                         p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER);
 506                     for( i = 0; i < __MIN(fmt.i_extra/4, 256); i++ )
 507                     {
 508                         ((uint32_t *)&fmt.video.p_palette->palette[0][0])[i] =
 509                             GetDWLE((uint32_t*)fmt.p_extra + i);
 510                     }
 511                 }
 512                 break;
 513
 514             case( AVIFOURCC_txts):
 515                 tk->i_cat   = SPU_ES;
 516                 tk->i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
 517                 msg_Dbg( p_demux, "stream[%d] subtitles", i );
 518                 es_format_Init( &fmt, SPU_ES, tk->i_codec );
 519                 break;
 520
 521             case( AVIFOURCC_iavs):
 522             case( AVIFOURCC_ivas):
 523                 p_sys->b_muxed = VLC_TRUE;
 524                 msg_Dbg( p_demux, "stream[%d] iavs with handler %4.4s", i, (char *)&p_strh->i_handler );
 525                 if( p_strh->i_handler == FOURCC_dvsd ||
 526                     p_strh->i_handler == FOURCC_dvhd ||
 527                     p_strh->i_handler == FOURCC_dvsl )
 528                 {
 529                     tk->p_out_muxed = stream_DemuxNew( p_demux, (char *)"rawdv", p_demux->out );
 530                     if( !tk->p_out_muxed )
 531                         msg_Err( p_demux, "could not load the DV parser" );
 532                     else break;
 533                 }
 534                 free( tk );
 535                 continue;
 536
 537             case( AVIFOURCC_mids):
 538                 msg_Dbg( p_demux, "stream[%d] midi is UNSUPPORTED", i );
 539
 540             default:
 541                 msg_Warn( p_demux, "stream[%d] unknown type %4.4s", i, (char *)&p_strh->i_type );
 542                 free( tk );
 543                 continue;
 544         }
 545         if( p_strn )
 546         {
 547             /* The charset of p_strn is undefined */
 548             EnsureUTF8( p_strn->p_str );
 549             fmt.psz_description = strdup( p_strn->p_str );
 550         }
 551         if( tk->p_out_muxed == NULL )
 552             tk->p_es = es_out_Add( p_demux->out, &fmt );
 553         TAB_APPEND( p_sys->i_track, p_sys->track, tk );
 554     }
 555
 556     if( p_sys->i_track <= 0 )
 557     {
 558         msg_Err( p_demux, "no valid track" );
 559         goto error;
 560     }
 561
 562     i_do_index =  config_GetInt( p_demux, "avi-index" );
 563     if( i_do_index == 1 ) /* Always fix */
 564     {
 565 aviindex:
 566         if( p_sys->b_seekable )
 567         {
 568             AVI_IndexCreate( p_demux );
 569         }
 570         else
 571         {
 572             msg_Warn( p_demux, "cannot create index (unseekable stream)" );
 573             AVI_IndexLoad( p_demux );
 574         }
 575     }
 576     else
 577     {
 578         AVI_IndexLoad( p_demux );
 579     }
 580
 581     /* *** movie length in sec *** */
 582     p_sys->i_length = AVI_MovieGetLength( p_demux );
 583     if( p_sys->i_length < (mtime_t)p_avih->i_totalframes *
 584                           (mtime_t)p_avih->i_microsecperframe /
 585                           (mtime_t)1000000 )
 586     {
 587         msg_Warn( p_demux, "broken or missing index, 'seek' will be "
 588                            "axproximative or will have strange behaviour" );
 589         if( i_do_index == 0 && !b_index )
 590         {
 591             int i_create;
 592             i_create = intf_UserYesNo( p_demux, _("AVI Index") ,
 593                         _( "This AVI file is broken. Seeking will not "
 594                         "work correctly.\nDo you want to "
 595                         "try to repair it?\n\nThis might take a long time." ),
 596                         _( "Repair" ), _( "Don't repair" ), _( "Cancel") );
 597             if( i_create == DIALOG_OK_YES )
 598             {
 599                 b_index = VLC_TRUE;
 600                 msg_Dbg( p_demux, "Fixing AVI index" );
 601                 goto aviindex;
 602             }
 603             else if( i_create == DIALOG_CANCELLED )
 604             {
 605                 /* Kill input */
 606                 vlc_object_kill( p_demux->p_parent );
 607                 goto error;
 608             }
 609         }
 610     }
 611
 612     /* fix some BeOS MediaKit generated file */
 613     for( i = 0 ; i < p_sys->i_track; i++ )
 614     {
 615         avi_track_t         *tk = p_sys->track[i];
 616         avi_chunk_list_t    *p_strl;
 617         avi_chunk_strh_t    *p_strh;
 618         avi_chunk_strf_auds_t    *p_auds;
 619
 620         if( tk->i_cat != AUDIO_ES )
 621         {
 622             continue;
 623         }
 624         if( tk->i_idxnb < 1 ||
 625             tk->i_scale != 1 ||
 626             tk->i_samplesize != 0 )
 627         {
 628             continue;
 629         }
 630         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 631         p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 632         p_auds = AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 633
 634         if( p_auds->p_wf->wFormatTag != WAVE_FORMAT_PCM &&
 635             (unsigned int)tk->i_rate == p_auds->p_wf->nSamplesPerSec )
 636         {
 637             int64_t i_track_length =
 638                 tk->p_index[tk->i_idxnb-1].i_length +
 639                 tk->p_index[tk->i_idxnb-1].i_lengthtotal;
 640             mtime_t i_length = (mtime_t)p_avih->i_totalframes *
 641                                (mtime_t)p_avih->i_microsecperframe;
 642
 643             if( i_length == 0 )
 644             {
 645                 msg_Warn( p_demux, "track[%d] cannot be fixed (BeOS MediaKit generated)", i );
 646                 continue;
 647             }
 648             tk->i_samplesize = 1;
 649             tk->i_rate       = i_track_length  * (int64_t)1000000/ i_length;
 650             msg_Warn( p_demux, "track[%d] fixed with rate=%d scale=%d (BeOS MediaKit generated)", i, tk->i_rate, tk->i_scale );
 651         }
 652     }
 653
 654     if( p_sys->b_seekable )
 655     {
 656         /* we have read all chunk so go back to movi */
 657         stream_Seek( p_demux->s, p_movi->i_chunk_pos );
 658     }
 659     /* Skip movi header */
 660     stream_Read( p_demux->s, NULL, 12 );
 661
 662     p_sys->i_movi_begin = p_movi->i_chunk_pos;
 663     return VLC_SUCCESS;
 664
 665 error:
 666     if( p_sys->meta )
 667     {
 668         vlc_meta_Delete( p_sys->meta );
 669     }
 670     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 671     free( p_sys );
 672     return VLC_EGENERIC;
 673 }
 674
 675 /*****************************************************************************
 676  * Close: frees unused data
 677  *****************************************************************************/
 678 static void Close ( vlc_object_t * p_this )
 679 {
 680     demux_t *    p_demux = (demux_t *)p_this;
 681     unsigned int i;
 682     demux_sys_t *p_sys = p_demux->p_sys  ;
 683
 684     for( i = 0; i < p_sys->i_track; i++ )
 685     {
 686         if( p_sys->track[i] )
 687         {
 688             if( p_sys->track[i]->p_out_muxed )
 689                 stream_DemuxDelete( p_sys->track[i]->p_out_muxed );
 690             FREENULL( p_sys->track[i]->p_index );
 691             free( p_sys->track[i] );
 692         }
 693     }
 694     FREENULL( p_sys->track );
 695     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 696     vlc_meta_Delete( p_sys->meta );
 697
 698     free( p_sys );
 699 }
 700
 701 /*****************************************************************************
 702  * Demux_Seekable: reads and demuxes data packets for stream seekable
 703  *****************************************************************************
 704  * AVIDemux: reads and demuxes data packets
 705  *****************************************************************************
 706  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 707  *****************************************************************************/
 708 typedef struct
 709 {
 710     vlc_bool_t b_ok;
 711
 712     int i_toread;
 713
 714     off_t i_posf; /* where we will read :
 715                    if i_idxposb == 0 : begining of chunk (+8 to acces data)
 716                    else : point on data directly */
 717 } avi_track_toread_t;
 718
 719 static int Demux_Seekable( demux_t *p_demux )
 720 {
 721     demux_sys_t *p_sys = p_demux->p_sys;
 722
 723     unsigned int i_track_count = 0;
 724     unsigned int i_track;
 725     vlc_bool_t b_stream;
 726     /* cannot be more than 100 stream (dcXX or wbXX) */
 727     avi_track_toread_t toread[100];
 728
 729
 730     /* detect new selected/unselected streams */
 731     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 732     {
 733         avi_track_t *tk = p_sys->track[i_track];
 734         vlc_bool_t  b;
 735
 736         if( p_sys->b_muxed && tk->p_out_muxed )
 737         {
 738             i_track_count++;
 739             tk->b_activated = VLC_TRUE;
 740             continue;
 741         }
 742
 743         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 744         if( b && !tk->b_activated )
 745         {
 746             if( p_sys->b_seekable)
 747             {
 748                 AVI_TrackSeek( p_demux, i_track, p_sys->i_time );
 749             }
 750             tk->b_activated = VLC_TRUE;
 751         }
 752         else if( !b && tk->b_activated )
 753         {
 754             tk->b_activated = VLC_FALSE;
 755         }
 756         if( b )
 757         {
 758             i_track_count++;
 759         }
 760     }
 761
 762     if( i_track_count <= 0 )
 763     {
 764         int64_t i_length = p_sys->i_length * (mtime_t)1000000;
 765
 766         p_sys->i_time += 25*1000;  /* read 25ms */
 767         if( i_length > 0 )
 768         {
 769             if( p_sys->i_time >= i_length )
 770                 return 0;
 771             return 1;
 772         }
 773         msg_Warn( p_demux, "no track selected, exiting..." );
 774         return 0;
 775     }
 776
 777     /* wait for the good time */
 778     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
 779     p_sys->i_time += 25*1000;  /* read 25ms */
 780
 781     /* init toread */
 782     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 783     {
 784         avi_track_t *tk = p_sys->track[i_track];
 785         mtime_t i_dpts;
 786
 787         toread[i_track].b_ok = tk->b_activated;
 788         if( tk->i_idxposc < tk->i_idxnb )
 789         {
 790             toread[i_track].i_posf = tk->p_index[tk->i_idxposc].i_pos;
 791            if( tk->i_idxposb > 0 )
 792            {
 793                 toread[i_track].i_posf += 8 + tk->i_idxposb;
 794            }
 795         }
 796         else
 797         {
 798             toread[i_track].i_posf = -1;
 799         }
 800
 801         i_dpts = p_sys->i_time - AVI_GetPTS( tk  );
 802
 803         if( tk->i_samplesize )
 804         {
 805             toread[i_track].i_toread = AVI_PTSToByte( tk, __ABS( i_dpts ) );
 806         }
 807         else
 808         {
 809             toread[i_track].i_toread = AVI_PTSToChunk( tk, __ABS( i_dpts ) );
 810         }
 811
 812         if( i_dpts < 0 )
 813         {
 814             toread[i_track].i_toread *= -1;
 815         }
 816     }
 817
 818     b_stream = VLC_FALSE;
 819
 820     for( ;; )
 821     {
 822         avi_track_t     *tk;
 823         vlc_bool_t       b_done;
 824         block_t         *p_frame;
 825         off_t i_pos;
 826         unsigned int i;
 827         size_t i_size;
 828
 829         /* search for first chunk to be read */
 830         for( i = 0, b_done = VLC_TRUE, i_pos = -1; i < p_sys->i_track; i++ )
 831         {
 832             if( !toread[i].b_ok ||
 833                 AVI_GetDPTS( p_sys->track[i],
 834                              toread[i].i_toread ) <= -25 * 1000 )
 835             {
 836                 continue;
 837             }
 838
 839             if( toread[i].i_toread > 0 )
 840             {
 841                 b_done = VLC_FALSE; /* not yet finished */
 842             }
 843             if( toread[i].i_posf > 0 )
 844             {
 845                 if( i_pos == -1 || i_pos > toread[i].i_posf )
 846                 {
 847                     i_track = i;
 848                     i_pos = toread[i].i_posf;
 849                 }
 850             }
 851         }
 852
 853         if( b_done )
 854         {
 855             return( 1 );
 856         }
 857
 858         if( i_pos == -1 )
 859         {
 860             int i_loop_count = 0;
 861
 862             /* no valid index, we will parse directly the stream
 863              * in case we fail we will disable all finished stream */
 864             if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
 865             {
 866                 stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
 867                 if( AVI_PacketNext( p_demux ) )
 868                 {
 869                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 870                 }
 871             }
 872             else
 873             {
 874                 stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
 875             }
 876
 877             for( ;; )
 878             {
 879                 avi_packet_t avi_pk;
 880
 881                 if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
 882                 {
 883                     msg_Warn( p_demux,
 884                              "cannot get packet header, track disabled" );
 885                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 886                 }
 887                 if( avi_pk.i_stream >= p_sys->i_track ||
 888                     ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
 889                 {
 890                     if( AVI_PacketNext( p_demux ) )
 891                     {
 892                         msg_Warn( p_demux,
 893                                   "cannot skip packet, track disabled" );
 894                         return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 895                     }
 896
 897                     /* Prevents from eating all the CPU with broken files.
 898                      * This value should be low enough so that it doesn't
 899                      * affect the reading speed too much. */
 900                     if( !(++i_loop_count % 1024) )
 901                     {
 902                         if( p_demux->b_die ) return -1;
 903                         msleep( 10000 );
 904
 905                         if( !(i_loop_count % (1024 * 10)) )
 906                             msg_Warn( p_demux,
 907                                       "don't seem to find any data..." );
 908                     }
 909                     continue;
 910                 }
 911                 else
 912                 {
 913                     /* add this chunk to the index */
 914                     avi_entry_t index;
 915
 916                     index.i_id = avi_pk.i_fourcc;
 917                     index.i_flags =
 918                        AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
 919                                       avi_pk.i_peek);
 920                     index.i_pos = avi_pk.i_pos;
 921                     index.i_length = avi_pk.i_size;
 922                     AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
 923
 924                     i_track = avi_pk.i_stream;
 925                     tk = p_sys->track[i_track];
 926                     /* do we will read this data ? */
 927                     if( AVI_GetDPTS( tk, toread[i_track].i_toread ) > -25*1000 )
 928                     {
 929                         break;
 930                     }
 931                     else
 932                     {
 933                         if( AVI_PacketNext( p_demux ) )
 934                         {
 935                             msg_Warn( p_demux,
 936                                       "cannot skip packet, track disabled" );
 937                             return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 938                         }
 939                     }
 940                 }
 941             }
 942
 943         }
 944         else
 945         {
 946             stream_Seek( p_demux->s, i_pos );
 947         }
 948
 949         /* Set the track to use */
 950         tk = p_sys->track[i_track];
 951
 952         /* read thoses data */
 953         if( tk->i_samplesize )
 954         {
 955             unsigned int i_toread;
 956
 957             if( ( i_toread = toread[i_track].i_toread ) <= 0 )
 958             {
 959                 if( tk->i_samplesize > 1 )
 960                 {
 961                     i_toread = tk->i_samplesize;
 962                 }
 963                 else
 964                 {
 965                     i_toread = AVI_PTSToByte( tk, 20 * 1000 );
 966                     i_toread = __MAX( i_toread, 100 );
 967                 }
 968             }
 969             i_size = __MIN( tk->p_index[tk->i_idxposc].i_length -
 970                                 tk->i_idxposb,
 971                             i_toread );
 972         }
 973         else
 974         {
 975             i_size = tk->p_index[tk->i_idxposc].i_length;
 976         }
 977
 978         if( tk->i_idxposb == 0 )
 979         {
 980             i_size += 8; /* need to read and skip header */
 981         }
 982
 983         if( ( p_frame = stream_Block( p_demux->s, __EVEN( i_size ) ) )==NULL )
 984         {
 985             msg_Warn( p_demux, "failed reading data" );
 986             tk->b_activated = VLC_FALSE;
 987             toread[i_track].b_ok = VLC_FALSE;
 988             continue;
 989         }
 990         if( i_size % 2 )    /* read was padded on word boundary */
 991         {
 992             p_frame->i_buffer--;
 993         }
 994         /* skip header */
 995         if( tk->i_idxposb == 0 )
 996         {
 997             p_frame->p_buffer += 8;
 998             p_frame->i_buffer -= 8;
 999         }
1000         p_frame->i_pts = AVI_GetPTS( tk ) + 1;
1001         if( tk->p_index[tk->i_idxposc].i_flags&AVIIF_KEYFRAME )
1002         {
1003             p_frame->i_flags = BLOCK_FLAG_TYPE_I;
1004         }
1005         else
1006         {
1007             p_frame->i_flags = BLOCK_FLAG_TYPE_PB;
1008         }
1009
1010         /* read data */
1011         if( tk->i_samplesize )
1012         {
1013             if( tk->i_idxposb == 0 )
1014             {
1015                 i_size -= 8;
1016             }
1017             toread[i_track].i_toread -= i_size;
1018             tk->i_idxposb += i_size;
1019             if( tk->i_idxposb >=
1020                     tk->p_index[tk->i_idxposc].i_length )
1021             {
1022                 tk->i_idxposb = 0;
1023                 tk->i_idxposc++;
1024             }
1025         }
1026         else
1027         {
1028             int i_length = tk->p_index[tk->i_idxposc].i_length;
1029
1030             tk->i_idxposc++;
1031             if( tk->i_cat == AUDIO_ES )
1032             {
1033                 tk->i_blockno += tk->i_blocksize > 0 ? ( i_length + tk->i_blocksize - 1 ) / tk->i_blocksize : 1;
1034             }
1035             toread[i_track].i_toread--;
1036         }
1037
1038         if( tk->i_idxposc < tk->i_idxnb)
1039         {
1040             toread[i_track].i_posf =
1041                 tk->p_index[tk->i_idxposc].i_pos;
1042             if( tk->i_idxposb > 0 )
1043             {
1044                 toread[i_track].i_posf += 8 + tk->i_idxposb;
1045             }
1046
1047         }
1048         else
1049         {
1050             toread[i_track].i_posf = -1;
1051         }
1052
1053         b_stream = VLC_TRUE; /* at least one read succeed */
1054
1055         if( tk->i_cat != VIDEO_ES )
1056             p_frame->i_dts = p_frame->i_pts;
1057         else
1058         {
1059             p_frame->i_dts = p_frame->i_pts;
1060             p_frame->i_pts = 0;
1061         }
1062
1063         //p_pes->i_rate = p_demux->stream.control.i_rate;
1064         if( tk->p_out_muxed )
1065             stream_DemuxSend( tk->p_out_muxed, p_frame );
1066         else
1067             es_out_Send( p_demux->out, tk->p_es, p_frame );
1068     }
1069 }
1070
1071
1072 /*****************************************************************************
1073  * Demux_UnSeekable: reads and demuxes data packets for unseekable file
1074  *****************************************************************************
1075  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1076  *****************************************************************************/
1077 static int Demux_UnSeekable( demux_t *p_demux )
1078 {
1079     demux_sys_t     *p_sys = p_demux->p_sys;
1080     avi_track_t *p_stream_master = NULL;
1081     unsigned int i_stream;
1082     unsigned int i_packet;
1083
1084     if( p_sys->b_muxed )
1085     {
1086         msg_Err( p_demux, "Can not yet process muxed avi substreams without seeking" );
1087         return VLC_EGENERIC;
1088     }
1089
1090     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
1091
1092     /* *** find master stream for data packet skipping algo *** */
1093     /* *** -> first video, if any, or first audio ES *** */
1094     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1095     {
1096         avi_track_t *tk = p_sys->track[i_stream];
1097         vlc_bool_t  b;
1098
1099         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
1100
1101         if( b && tk->i_cat == VIDEO_ES )
1102         {
1103             p_stream_master = tk;
1104         }
1105         else if( b )
1106         {
1107             p_stream_master = tk;
1108         }
1109     }
1110
1111     if( !p_stream_master )
1112     {
1113         msg_Warn( p_demux, "no more stream selected" );
1114         return( 0 );
1115     }
1116
1117     p_sys->i_time = AVI_GetPTS( p_stream_master );
1118
1119     for( i_packet = 0; i_packet < 10; i_packet++)
1120     {
1121 #define p_stream    p_sys->track[avi_pk.i_stream]
1122
1123         avi_packet_t    avi_pk;
1124
1125         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1126         {
1127             return( 0 );
1128         }
1129
1130         if( avi_pk.i_stream >= p_sys->i_track ||
1131             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1132         {
1133             /* we haven't found an audio or video packet:
1134              *  - we have seek, found first next packet
1135              *  - others packets could be found, skip them
1136              */
1137             switch( avi_pk.i_fourcc )
1138             {
1139                 case AVIFOURCC_JUNK:
1140                 case AVIFOURCC_LIST:
1141                 case AVIFOURCC_RIFF:
1142                     return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1143                 case AVIFOURCC_idx1:
1144                     if( p_sys->b_odml )
1145                     {
1146                         return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1147                     }
1148                     return( 0 );    /* eof */
1149                 default:
1150                     msg_Warn( p_demux,
1151                               "seems to have lost position, resync" );
1152                     if( AVI_PacketSearch( p_demux ) )
1153                     {
1154                         msg_Err( p_demux, "resync failed" );
1155                         return( -1 );
1156                     }
1157             }
1158         }
1159         else
1160         {
1161             /* check for time */
1162             if( __ABS( AVI_GetPTS( p_stream ) -
1163                         AVI_GetPTS( p_stream_master ) )< 600*1000 )
1164             {
1165                 /* load it and send to decoder */
1166                 block_t *p_frame;
1167                 if( AVI_PacketRead( p_demux, &avi_pk, &p_frame ) || p_frame == NULL )
1168                 {
1169                     return( -1 );
1170                 }
1171                 p_frame->i_pts = AVI_GetPTS( p_stream ) + 1;
1172
1173                 if( avi_pk.i_cat != VIDEO_ES )
1174                     p_frame->i_dts = p_frame->i_pts;
1175                 else
1176                 {
1177                     p_frame->i_dts = p_frame->i_pts;
1178                     p_frame->i_pts = 0;
1179                 }
1180
1181                 //p_pes->i_rate = p_demux->stream.control.i_rate;
1182                 es_out_Send( p_demux->out, p_stream->p_es, p_frame );
1183             }
1184             else
1185             {
1186                 if( AVI_PacketNext( p_demux ) )
1187                 {
1188                     return( 0 );
1189                 }
1190             }
1191
1192             /* *** update stream time position *** */
1193             if( p_stream->i_samplesize )
1194             {
1195                 p_stream->i_idxposb += avi_pk.i_size;
1196             }
1197             else
1198             {
1199                 if( p_stream->i_cat == AUDIO_ES )
1200                 {
1201                     p_stream->i_blockno += p_stream->i_blocksize > 0 ? ( avi_pk.i_size + p_stream->i_blocksize - 1 ) / p_stream->i_blocksize : 1;
1202                 }
1203                 p_stream->i_idxposc++;
1204             }
1205
1206         }
1207 #undef p_stream
1208     }
1209
1210     return( 1 );
1211 }
1212
1213 /*****************************************************************************
1214  * Seek: goto to i_date or i_percent
1215  *****************************************************************************/
1216 static int Seek( demux_t *p_demux, mtime_t i_date, int i_percent )
1217 {
1218
1219     demux_sys_t *p_sys = p_demux->p_sys;
1220     unsigned int i_stream;
1221     msg_Dbg( p_demux, "seek requested: "I64Fd" seconds %d%%",
1222              i_date / 1000000, i_percent );
1223
1224     if( p_sys->b_seekable )
1225     {
1226         if( !p_sys->i_length )
1227         {
1228             avi_track_t *p_stream;
1229             int64_t i_pos;
1230
1231             /* use i_percent to create a true i_date */
1232             msg_Warn( p_demux, "seeking without index at %d%%"
1233                       " only works for interleaved files", i_percent );
1234             if( i_percent >= 100 )
1235             {
1236                 msg_Warn( p_demux, "cannot seek so far !" );
1237                 return VLC_EGENERIC;
1238             }
1239             i_percent = __MAX( i_percent, 0 );
1240
1241             /* try to find chunk that is at i_percent or the file */
1242             i_pos = __MAX( i_percent * stream_Size( p_demux->s ) / 100,
1243                            p_sys->i_movi_begin );
1244             /* search first selected stream */
1245             for( i_stream = 0, p_stream = NULL;
1246                         i_stream < p_sys->i_track; i_stream++ )
1247             {
1248                 p_stream = p_sys->track[i_stream];
1249                 if( p_stream->b_activated )
1250                 {
1251                     break;
1252                 }
1253             }
1254             if( !p_stream || !p_stream->b_activated )
1255             {
1256                 msg_Warn( p_demux, "cannot find any selected stream" );
1257                 return VLC_EGENERIC;
1258             }
1259
1260             /* be sure that the index exist */
1261             if( AVI_StreamChunkSet( p_demux, i_stream, 0 ) )
1262             {
1263                 msg_Warn( p_demux, "cannot seek" );
1264                 return VLC_EGENERIC;
1265             }
1266
1267             while( i_pos >= p_stream->p_index[p_stream->i_idxposc].i_pos +
1268                p_stream->p_index[p_stream->i_idxposc].i_length + 8 )
1269             {
1270                 /* search after i_idxposc */
1271                 if( AVI_StreamChunkSet( p_demux,
1272                                         i_stream, p_stream->i_idxposc + 1 ) )
1273                 {
1274                     msg_Warn( p_demux, "cannot seek" );
1275                     return VLC_EGENERIC;
1276                 }
1277             }
1278
1279             i_date = AVI_GetPTS( p_stream );
1280             /* TODO better support for i_samplesize != 0 */
1281             msg_Dbg( p_demux, "estimate date "I64Fd, i_date );
1282         }
1283
1284         /* */
1285         for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1286         {
1287             avi_track_t *p_stream = p_sys->track[i_stream];
1288
1289             if( !p_stream->b_activated )
1290                 continue;
1291
1292             AVI_TrackSeek( p_demux, i_stream, i_date );
1293         }
1294         p_sys->i_time = i_date;
1295         msg_Dbg( p_demux, "seek: "I64Fd" seconds", p_sys->i_time /1000000 );
1296         return VLC_SUCCESS;
1297     }
1298     else
1299     {
1300         msg_Err( p_demux, "shouldn't yet be executed" );
1301         return VLC_EGENERIC;
1302     }
1303 }
1304
1305 /*****************************************************************************
1306  * Control:
1307  *****************************************************************************/
1308 static double ControlGetPosition( demux_t *p_demux )
1309 {
1310     demux_sys_t *p_sys = p_demux->p_sys;
1311
1312     if( p_sys->i_length > 0 )
1313     {
1314         return (double)p_sys->i_time / (double)( p_sys->i_length * (mtime_t)1000000 );
1315     }
1316     else if( stream_Size( p_demux->s ) > 0 )
1317     {
1318         unsigned int i;
1319         int64_t i_tmp;
1320         int64_t i64 = 0;
1321
1322         /* search the more advanced selected es */
1323         for( i = 0; i < p_sys->i_track; i++ )
1324         {
1325             avi_track_t *tk = p_sys->track[i];
1326             if( tk->b_activated && tk->i_idxposc < tk->i_idxnb )
1327             {
1328                 i_tmp = tk->p_index[tk->i_idxposc].i_pos +
1329                         tk->p_index[tk->i_idxposc].i_length + 8;
1330                 if( i_tmp > i64 )
1331                 {
1332                     i64 = i_tmp;
1333                 }
1334             }
1335         }
1336         return (double)i64 / stream_Size( p_demux->s );
1337     }
1338     return 0.0;
1339 }
1340
1341 static int Control( demux_t *p_demux, int i_query, va_list args )
1342 {
1343     demux_sys_t *p_sys = p_demux->p_sys;
1344     int i;
1345     double   f, *pf;
1346     int64_t i64, *pi64;
1347     vlc_meta_t *p_meta;
1348
1349     switch( i_query )
1350     {
1351         case DEMUX_GET_POSITION:
1352             pf = (double*)va_arg( args, double * );
1353             *pf = ControlGetPosition( p_demux );
1354             return VLC_SUCCESS;
1355         case DEMUX_SET_POSITION:
1356             f = (double)va_arg( args, double );
1357             if( p_sys->b_seekable )
1358             {
1359                 i64 = (mtime_t)(1000000.0 * p_sys->i_length * f );
1360                 return Seek( p_demux, i64, (int)(f * 100) );
1361             }
1362             else
1363             {
1364                 int64_t i_pos = stream_Size( p_demux->s ) * f;
1365                 return stream_Seek( p_demux->s, i_pos );
1366             }
1367
1368         case DEMUX_GET_TIME:
1369             pi64 = (int64_t*)va_arg( args, int64_t * );
1370             *pi64 = p_sys->i_time;
1371             return VLC_SUCCESS;
1372
1373         case DEMUX_SET_TIME:
1374         {
1375             int i_percent = 0;
1376
1377             i64 = (int64_t)va_arg( args, int64_t );
1378             if( p_sys->i_length > 0 )
1379             {
1380                 i_percent = 100 * i64 / (p_sys->i_length*1000000);
1381             }
1382             else if( p_sys->i_time > 0 )
1383             {
1384                 i_percent = (int)( 100.0 * ControlGetPosition( p_demux ) *
1385                                    (double)i64 / (double)p_sys->i_time );
1386             }
1387             return Seek( p_demux, i64, i_percent );
1388         }
1389         case DEMUX_GET_LENGTH:
1390             pi64 = (int64_t*)va_arg( args, int64_t * );
1391             *pi64 = p_sys->i_length * (mtime_t)1000000;
1392             return VLC_SUCCESS;
1393
1394         case DEMUX_GET_FPS:
1395             pf = (double*)va_arg( args, double * );
1396             *pf = 0.0;
1397             for( i = 0; i < (int)p_sys->i_track; i++ )
1398             {
1399                 avi_track_t *tk = p_sys->track[i];
1400                 if( tk->i_cat == VIDEO_ES && tk->i_scale > 0)
1401                 {
1402                     *pf = (float)tk->i_rate / (float)tk->i_scale;
1403                     break;
1404                 }
1405             }
1406             return VLC_SUCCESS;
1407         case DEMUX_GET_META:
1408             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
1409             vlc_meta_Merge( p_meta,  p_sys->meta );
1410             return VLC_SUCCESS;
1411
1412         default:
1413             return VLC_EGENERIC;
1414     }
1415 }
1416
1417 /*****************************************************************************
1418  * Function to convert pts to chunk or byte
1419  *****************************************************************************/
1420
1421 static mtime_t AVI_PTSToChunk( avi_track_t *tk, mtime_t i_pts )
1422 {
1423     if( !tk->i_scale )
1424         return (mtime_t)0;
1425
1426     return (mtime_t)((int64_t)i_pts *
1427                      (int64_t)tk->i_rate /
1428                      (int64_t)tk->i_scale /
1429                      (int64_t)1000000 );
1430 }
1431 static mtime_t AVI_PTSToByte( avi_track_t *tk, mtime_t i_pts )
1432 {
1433     if( !tk->i_scale || !tk->i_samplesize )
1434         return (mtime_t)0;
1435
1436     return (mtime_t)((int64_t)i_pts *
1437                      (int64_t)tk->i_rate /
1438                      (int64_t)tk->i_scale /
1439                      (int64_t)1000000 *
1440                      (int64_t)tk->i_samplesize );
1441 }
1442
1443 static mtime_t AVI_GetDPTS( avi_track_t *tk, int64_t i_count )
1444 {
1445     mtime_t i_dpts = 0;
1446
1447     if( !tk->i_rate )
1448         return i_dpts;
1449
1450     i_dpts = (mtime_t)( (int64_t)1000000 *
1451                         (int64_t)i_count *
1452                         (int64_t)tk->i_scale /
1453                         (int64_t)tk->i_rate );
1454
1455     if( tk->i_samplesize )
1456     {
1457         return i_dpts / tk->i_samplesize;
1458     }
1459     return i_dpts;
1460 }
1461
1462 static mtime_t AVI_GetPTS( avi_track_t *tk )
1463 {
1464     if( tk->i_samplesize )
1465     {
1466         int64_t i_count = 0;
1467
1468         /* we need a valid entry we will emulate one */
1469         if( tk->i_idxposc == tk->i_idxnb )
1470         {
1471             if( tk->i_idxposc )
1472             {
1473                 /* use the last entry */
1474                 i_count = tk->p_index[tk->i_idxnb - 1].i_lengthtotal
1475                             + tk->p_index[tk->i_idxnb - 1].i_length;
1476             }
1477         }
1478         else
1479         {
1480             i_count = tk->p_index[tk->i_idxposc].i_lengthtotal;
1481         }
1482         return AVI_GetDPTS( tk, i_count + tk->i_idxposb );
1483     }
1484     else
1485     {
1486         if( tk->i_cat == AUDIO_ES )
1487         {
1488             return AVI_GetDPTS( tk, tk->i_blockno );
1489         }
1490         else
1491         {
1492             return AVI_GetDPTS( tk, tk->i_idxposc );
1493         }
1494     }
1495 }
1496
1497 static int AVI_StreamChunkFind( demux_t *p_demux, unsigned int i_stream )
1498 {
1499     demux_sys_t *p_sys = p_demux->p_sys;
1500     avi_packet_t avi_pk;
1501     int i_loop_count = 0;
1502
1503     /* find first chunk of i_stream that isn't in index */
1504
1505     if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
1506     {
1507         stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
1508         if( AVI_PacketNext( p_demux ) )
1509         {
1510             return VLC_EGENERIC;
1511         }
1512     }
1513     else
1514     {
1515         stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
1516     }
1517
1518     for( ;; )
1519     {
1520         if( p_demux->b_die ) return VLC_EGENERIC;
1521
1522         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1523         {
1524             msg_Warn( p_demux, "cannot get packet header" );
1525             return VLC_EGENERIC;
1526         }
1527         if( avi_pk.i_stream >= p_sys->i_track ||
1528             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1529         {
1530             if( AVI_PacketNext( p_demux ) )
1531             {
1532                 return VLC_EGENERIC;
1533             }
1534
1535             /* Prevents from eating all the CPU with broken files.
1536              * This value should be low enough so that it doesn't
1537              * affect the reading speed too much. */
1538             if( !(++i_loop_count % 1024) )
1539             {
1540                 if( p_demux->b_die ) return VLC_EGENERIC;
1541                 msleep( 10000 );
1542
1543                 if( !(i_loop_count % (1024 * 10)) )
1544                     msg_Warn( p_demux, "don't seem to find any data..." );
1545             }
1546         }
1547         else
1548         {
1549             /* add this chunk to the index */
1550             avi_entry_t index;
1551
1552             index.i_id = avi_pk.i_fourcc;
1553             index.i_flags =
1554                AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
1555                               avi_pk.i_peek);
1556             index.i_pos = avi_pk.i_pos;
1557             index.i_length = avi_pk.i_size;
1558             AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
1559
1560             if( avi_pk.i_stream == i_stream  )
1561             {
1562                 return VLC_SUCCESS;
1563             }
1564
1565             if( AVI_PacketNext( p_demux ) )
1566             {
1567                 return VLC_EGENERIC;
1568             }
1569         }
1570     }
1571 }
1572
1573 /* be sure that i_ck will be a valid index entry */
1574 static int AVI_StreamChunkSet( demux_t *p_demux, unsigned int i_stream,
1575                                unsigned int i_ck )
1576 {
1577     demux_sys_t *p_sys = p_demux->p_sys;
1578     avi_track_t *p_stream = p_sys->track[i_stream];
1579
1580     p_stream->i_idxposc = i_ck;
1581     p_stream->i_idxposb = 0;
1582
1583     if(  i_ck >= p_stream->i_idxnb )
1584     {
1585         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1586         do
1587         {
1588             p_stream->i_idxposc++;
1589             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1590             {
1591                 return VLC_EGENERIC;
1592             }
1593
1594         } while( p_stream->i_idxposc < i_ck );
1595     }
1596
1597     return VLC_SUCCESS;
1598 }
1599
1600 /* XXX FIXME up to now, we assume that all chunk are one after one */
1601 static int AVI_StreamBytesSet( demux_t    *p_demux,
1602                                unsigned int i_stream,
1603                                off_t   i_byte )
1604 {
1605     demux_sys_t *p_sys = p_demux->p_sys;
1606     avi_track_t *p_stream = p_sys->track[i_stream];
1607
1608     if( ( p_stream->i_idxnb > 0 )
1609         &&( i_byte < p_stream->p_index[p_stream->i_idxnb - 1].i_lengthtotal +
1610                 p_stream->p_index[p_stream->i_idxnb - 1].i_length ) )
1611     {
1612         /* index is valid to find the ck */
1613         /* uses dichototmie to be fast enougth */
1614         int i_idxposc = __MIN( p_stream->i_idxposc, p_stream->i_idxnb - 1 );
1615         int i_idxmax  = p_stream->i_idxnb;
1616         int i_idxmin  = 0;
1617         for( ;; )
1618         {
1619             if( p_stream->p_index[i_idxposc].i_lengthtotal > i_byte )
1620             {
1621                 i_idxmax  = i_idxposc ;
1622                 i_idxposc = ( i_idxmin + i_idxposc ) / 2 ;
1623             }
1624             else
1625             {
1626                 if( p_stream->p_index[i_idxposc].i_lengthtotal +
1627                         p_stream->p_index[i_idxposc].i_length <= i_byte)
1628                 {
1629                     i_idxmin  = i_idxposc ;
1630                     i_idxposc = (i_idxmax + i_idxposc ) / 2 ;
1631                 }
1632                 else
1633                 {
1634                     p_stream->i_idxposc = i_idxposc;
1635                     p_stream->i_idxposb = i_byte -
1636                             p_stream->p_index[i_idxposc].i_lengthtotal;
1637                     return VLC_SUCCESS;
1638                 }
1639             }
1640         }
1641
1642     }
1643     else
1644     {
1645         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1646         p_stream->i_idxposb = 0;
1647         do
1648         {
1649             p_stream->i_idxposc++;
1650             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1651             {
1652                 return VLC_EGENERIC;
1653             }
1654
1655         } while( p_stream->p_index[p_stream->i_idxposc].i_lengthtotal +
1656                     p_stream->p_index[p_stream->i_idxposc].i_length <= i_byte );
1657
1658         p_stream->i_idxposb = i_byte -
1659                        p_stream->p_index[p_stream->i_idxposc].i_lengthtotal;
1660         return VLC_SUCCESS;
1661     }
1662 }
1663
1664 static int AVI_TrackSeek( demux_t *p_demux,
1665                            int i_stream,
1666                            mtime_t i_date )
1667 {
1668     demux_sys_t  *p_sys = p_demux->p_sys;
1669     avi_track_t  *tk = p_sys->track[i_stream];
1670
1671 #define p_stream    p_sys->track[i_stream]
1672     mtime_t i_oldpts;
1673
1674     i_oldpts = AVI_GetPTS( p_stream );
1675
1676     if( !p_stream->i_samplesize )
1677     {
1678         if( AVI_StreamChunkSet( p_demux,
1679                                 i_stream,
1680                                 AVI_PTSToChunk( p_stream, i_date ) ) )
1681         {
1682             return VLC_EGENERIC;
1683         }
1684
1685         if( p_stream->i_cat == AUDIO_ES )
1686         {
1687             unsigned int i;
1688             tk->i_blockno = 0;
1689             for( i = 0; i < tk->i_idxposc; i++ )
1690             {
1691                 if( tk->i_blocksize > 0 )
1692                 {
1693                     tk->i_blockno += ( tk->p_index[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize;
1694                 }
1695                 else
1696                 {
1697                     tk->i_blockno++;
1698                 }
1699             }
1700         }
1701
1702         msg_Dbg( p_demux,
1703                  "old:"I64Fd" %s new "I64Fd,
1704                  i_oldpts,
1705                  i_oldpts > i_date ? ">" : "<",
1706                  i_date );
1707
1708         if( p_stream->i_cat == VIDEO_ES )
1709         {
1710             /* search key frame */
1711             //if( i_date < i_oldpts || 1 )
1712             {
1713                 while( p_stream->i_idxposc > 0 &&
1714                    !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1715                                                                 AVIIF_KEYFRAME ) )
1716                 {
1717                     if( AVI_StreamChunkSet( p_demux,
1718                                             i_stream,
1719                                             p_stream->i_idxposc - 1 ) )
1720                     {
1721                         return VLC_EGENERIC;
1722                     }
1723                 }
1724                 if( p_stream->p_es )
1725                     es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, p_stream->p_es, i_date );
1726             }
1727 #if 0
1728             else
1729             {
1730                 while( p_stream->i_idxposc < p_stream->i_idxnb &&
1731                         !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1732                                                                 AVIIF_KEYFRAME ) )
1733                 {
1734                     if( AVI_StreamChunkSet( p_demux,
1735                                             i_stream,
1736                                             p_stream->i_idxposc + 1 ) )
1737                     {
1738                         return VLC_EGENERIC;
1739                     }
1740                 }
1741             }
1742 #endif
1743         }
1744     }
1745     else
1746     {
1747         if( AVI_StreamBytesSet( p_demux,
1748                                 i_stream,
1749                                 AVI_PTSToByte( p_stream, i_date ) ) )
1750         {
1751             return VLC_EGENERIC;
1752         }
1753     }
1754     return VLC_SUCCESS;
1755 #undef p_stream
1756 }
1757
1758 /****************************************************************************
1759  * Return VLC_TRUE if it's a key frame
1760  ****************************************************************************/
1761 static int AVI_GetKeyFlag( vlc_fourcc_t i_fourcc, uint8_t *p_byte )
1762 {
1763     switch( i_fourcc )
1764     {
1765         case FOURCC_DIV1:
1766             /* we have:
1767              *  startcode:      0x00000100   32bits
1768              *  framenumber     ?             5bits
1769              *  piture type     0(I),1(P)     2bits
1770              */
1771             if( GetDWBE( p_byte ) != 0x00000100 )
1772             {
1773                 /* it's not an msmpegv1 stream, strange...*/
1774                 return AVIIF_KEYFRAME;
1775             }
1776             return p_byte[4] & 0x06 ? 0 : AVIIF_KEYFRAME;
1777
1778         case FOURCC_DIV2:
1779         case FOURCC_DIV3:   /* wmv1 also */
1780             /* we have
1781              *  picture type    0(I),1(P)     2bits
1782              */
1783             return p_byte[0] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1784         case FOURCC_mp4v:
1785             /* we should find first occurrence of 0x000001b6 (32bits)
1786              *  startcode:      0x000001b6   32bits
1787              *  piture type     0(I),1(P)     2bits
1788              */
1789             if( GetDWBE( p_byte ) != 0x000001b6 )
1790             {
1791                 /* not true , need to find the first VOP header */
1792                 return AVIIF_KEYFRAME;
1793             }
1794             return p_byte[4] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1795
1796         default:
1797             /* I can't do it, so say yes */
1798             return AVIIF_KEYFRAME;
1799     }
1800 }
1801
1802 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t i_codec )
1803 {
1804     switch( i_cat )
1805     {
1806         case AUDIO_ES:
1807             wf_tag_to_fourcc( i_codec, &i_codec, NULL );
1808             return i_codec;
1809
1810         case VIDEO_ES:
1811             /* XXX DIV1 <- msmpeg4v1, DIV2 <- msmpeg4v2, DIV3 <- msmpeg4v3, mp4v for mpeg4 */
1812             switch( i_codec )
1813             {
1814                 case FOURCC_1:
1815                     return VLC_FOURCC('m','r','l','e');
1816                 case FOURCC_DIV1:
1817                 case FOURCC_div1:
1818                 case FOURCC_MPG4:
1819                 case FOURCC_mpg4:
1820                     return FOURCC_DIV1;
1821                 case FOURCC_DIV2:
1822                 case FOURCC_div2:
1823                 case FOURCC_MP42:
1824                 case FOURCC_mp42:
1825                 case FOURCC_MPG3:
1826                 case FOURCC_mpg3:
1827                     return FOURCC_DIV2;
1828                 case FOURCC_div3:
1829                 case FOURCC_MP43:
1830                 case FOURCC_mp43:
1831                 case FOURCC_DIV3:
1832                 case FOURCC_DIV4:
1833                 case FOURCC_div4:
1834                 case FOURCC_DIV5:
1835                 case FOURCC_div5:
1836                 case FOURCC_DIV6:
1837                 case FOURCC_div6:
1838                 case FOURCC_AP41:
1839                 case FOURCC_3IV1:
1840                 case FOURCC_3iv1:
1841                 case FOURCC_3IVD:
1842                 case FOURCC_3ivd:
1843                 case FOURCC_3VID:
1844                 case FOURCC_3vid:
1845                     return FOURCC_DIV3;
1846                 case FOURCC_DIVX:
1847                 case FOURCC_divx:
1848                 case FOURCC_MP4S:
1849                 case FOURCC_mp4s:
1850                 case FOURCC_M4S2:
1851                 case FOURCC_m4s2:
1852                 case FOURCC_xvid:
1853                 case FOURCC_XVID:
1854                 case FOURCC_XviD:
1855                 case FOURCC_DX50:
1856                 case FOURCC_dx50:
1857                 case FOURCC_mp4v:
1858                 case FOURCC_4:
1859                 case FOURCC_3IV2:
1860                 case FOURCC_3iv2:
1861                     return FOURCC_mp4v;
1862             }
1863         default:
1864             return VLC_FOURCC( 'u', 'n', 'd', 'f' );
1865     }
1866 }
1867
1868 /****************************************************************************
1869  *
1870  ****************************************************************************/
1871 static void AVI_ParseStreamHeader( vlc_fourcc_t i_id,
1872                                    unsigned int *pi_number, unsigned int *pi_type )
1873 {
1874 #define SET_PTR( p, v ) if( p ) *(p) = (v);
1875     int c1, c2;
1876
1877     c1 = ((uint8_t *)&i_id)[0];
1878     c2 = ((uint8_t *)&i_id)[1];
1879
1880     if( c1 < '0' || c1 > '9' || c2 < '0' || c2 > '9' )
1881     {
1882         SET_PTR( pi_number, 100 ); /* > max stream number */
1883         SET_PTR( pi_type, UNKNOWN_ES );
1884     }
1885     else
1886     {
1887         SET_PTR( pi_number, (c1 - '0') * 10 + (c2 - '0' ) );
1888         switch( VLC_TWOCC( ((uint8_t *)&i_id)[2], ((uint8_t *)&i_id)[3] ) )
1889         {
1890             case AVITWOCC_wb:
1891                 SET_PTR( pi_type, AUDIO_ES );
1892                 break;
1893             case AVITWOCC_dc:
1894             case AVITWOCC_db:
1895                 SET_PTR( pi_type, VIDEO_ES );
1896                 break;
1897             default:
1898                 SET_PTR( pi_type, UNKNOWN_ES );
1899                 break;
1900         }
1901     }
1902 #undef SET_PTR
1903 }
1904
1905 /****************************************************************************
1906  *
1907  ****************************************************************************/
1908 static int AVI_PacketGetHeader( demux_t *p_demux, avi_packet_t *p_pk )
1909 {
1910     const uint8_t *p_peek;
1911
1912     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 )
1913     {
1914         return VLC_EGENERIC;
1915     }
1916     p_pk->i_fourcc  = VLC_FOURCC( p_peek[0], p_peek[1], p_peek[2], p_peek[3] );
1917     p_pk->i_size    = GetDWLE( p_peek + 4 );
1918     p_pk->i_pos     = stream_Tell( p_demux->s );
1919     if( p_pk->i_fourcc == AVIFOURCC_LIST || p_pk->i_fourcc == AVIFOURCC_RIFF )
1920     {
1921         p_pk->i_type = VLC_FOURCC( p_peek[8],  p_peek[9],
1922                                    p_peek[10], p_peek[11] );
1923     }
1924     else
1925     {
1926         p_pk->i_type = 0;
1927     }
1928
1929     memcpy( p_pk->i_peek, p_peek + 8, 8 );
1930
1931     AVI_ParseStreamHeader( p_pk->i_fourcc, &p_pk->i_stream, &p_pk->i_cat );
1932     return VLC_SUCCESS;
1933 }
1934
1935 static int AVI_PacketNext( demux_t *p_demux )
1936 {
1937     avi_packet_t    avi_ck;
1938     int             i_skip = 0;
1939
1940     if( AVI_PacketGetHeader( p_demux, &avi_ck ) )
1941     {
1942         return VLC_EGENERIC;
1943     }
1944
1945     if( avi_ck.i_fourcc == AVIFOURCC_LIST &&
1946         ( avi_ck.i_type == AVIFOURCC_rec || avi_ck.i_type == AVIFOURCC_movi ) )
1947     {
1948         i_skip = 12;
1949     }
1950     else if( avi_ck.i_fourcc == AVIFOURCC_RIFF &&
1951              avi_ck.i_type == AVIFOURCC_AVIX )
1952     {
1953         i_skip = 24;
1954     }
1955     else
1956     {
1957         i_skip = __EVEN( avi_ck.i_size ) + 8;
1958     }
1959
1960     if( stream_Read( p_demux->s, NULL, i_skip ) != i_skip )
1961     {
1962         return VLC_EGENERIC;
1963     }
1964     return VLC_SUCCESS;
1965 }
1966
1967 static int AVI_PacketRead( demux_t   *p_demux,
1968                            avi_packet_t     *p_pk,
1969                            block_t          **pp_frame )
1970 {
1971     size_t i_size;
1972
1973     i_size = __EVEN( p_pk->i_size + 8 );
1974
1975     if( ( *pp_frame = stream_Block( p_demux->s, i_size ) ) == NULL )
1976     {
1977         return VLC_EGENERIC;
1978     }
1979     (*pp_frame)->p_buffer += 8;
1980     (*pp_frame)->i_buffer -= 8;
1981
1982     if( i_size != p_pk->i_size + 8 )
1983     {
1984         (*pp_frame)->i_buffer--;
1985     }
1986
1987     return VLC_SUCCESS;
1988 }
1989
1990 static int AVI_PacketSearch( demux_t *p_demux )
1991 {
1992     demux_sys_t     *p_sys = p_demux->p_sys;
1993     avi_packet_t    avi_pk;
1994     int             i_count = 0;
1995
1996     for( ;; )
1997     {
1998         if( stream_Read( p_demux->s, NULL, 1 ) != 1 )
1999         {
2000             return VLC_EGENERIC;
2001         }
2002         AVI_PacketGetHeader( p_demux, &avi_pk );
2003         if( avi_pk.i_stream < p_sys->i_track &&
2004             ( avi_pk.i_cat == AUDIO_ES || avi_pk.i_cat == VIDEO_ES ) )
2005         {
2006             return VLC_SUCCESS;
2007         }
2008         switch( avi_pk.i_fourcc )
2009         {
2010             case AVIFOURCC_JUNK:
2011             case AVIFOURCC_LIST:
2012             case AVIFOURCC_RIFF:
2013             case AVIFOURCC_idx1:
2014                 return VLC_SUCCESS;
2015         }
2016
2017         /* Prevents from eating all the CPU with broken files.
2018          * This value should be low enough so that it doesn't affect the
2019          * reading speed too much (not that we care much anyway because
2020          * this code is called only on broken files). */
2021         if( !(++i_count % 1024) )
2022         {
2023             if( p_demux->b_die ) return VLC_EGENERIC;
2024
2025             msleep( 10000 );
2026             if( !(i_count % (1024 * 10)) )
2027                 msg_Warn( p_demux, "trying to resync..." );
2028         }
2029     }
2030 }
2031
2032 /****************************************************************************
2033  * Index stuff.
2034  ****************************************************************************/
2035 static void AVI_IndexAddEntry( demux_sys_t *p_sys,
2036                                int i_stream,
2037                                avi_entry_t *p_index)
2038 {
2039     avi_track_t *tk = p_sys->track[i_stream];
2040
2041     /* Update i_movi_lastchunk_pos */
2042     if( p_sys->i_movi_lastchunk_pos < p_index->i_pos )
2043     {
2044         p_sys->i_movi_lastchunk_pos = p_index->i_pos;
2045     }
2046
2047     /* add the entry */
2048     if( tk->i_idxnb >= tk->i_idxmax )
2049     {
2050         tk->i_idxmax += 16384;
2051         tk->p_index = realloc( tk->p_index,
2052                                tk->i_idxmax * sizeof( avi_entry_t ) );
2053         if( tk->p_index == NULL )
2054         {
2055             return;
2056         }
2057     }
2058     /* calculate cumulate length */
2059     if( tk->i_idxnb > 0 )
2060     {
2061         p_index->i_lengthtotal =
2062             tk->p_index[tk->i_idxnb - 1].i_length +
2063                 tk->p_index[tk->i_idxnb - 1].i_lengthtotal;
2064     }
2065     else
2066     {
2067         p_index->i_lengthtotal = 0;
2068     }
2069
2070     tk->p_index[tk->i_idxnb++] = *p_index;
2071 }
2072
2073 static int AVI_IndexLoad_idx1( demux_t *p_demux )
2074 {
2075     demux_sys_t *p_sys = p_demux->p_sys;
2076
2077     avi_chunk_list_t    *p_riff;
2078     avi_chunk_list_t    *p_movi;
2079     avi_chunk_idx1_t    *p_idx1;
2080
2081     unsigned int i_stream;
2082     unsigned int i_index;
2083     off_t        i_offset;
2084     unsigned int i;
2085
2086     vlc_bool_t b_keyset[100];
2087
2088     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2089     p_idx1 = AVI_ChunkFind( p_riff, AVIFOURCC_idx1, 0);
2090     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2091
2092     if( !p_idx1 )
2093     {
2094         msg_Warn( p_demux, "cannot find idx1 chunk, no index defined" );
2095         return VLC_EGENERIC;
2096     }
2097
2098     /* *** calculate offset *** */
2099     /* Well, avi is __SHIT__ so test more than one entry
2100      * (needed for some avi files) */
2101     i_offset = 0;
2102     for( i = 0; i < __MIN( p_idx1->i_entry_count, 10 ); i++ )
2103     {
2104         if( p_idx1->entry[i].i_pos < p_movi->i_chunk_pos )
2105         {
2106             i_offset = p_movi->i_chunk_pos + 8;
2107             break;
2108         }
2109     }
2110
2111     /* Reset b_keyset */
2112     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2113         b_keyset[i_stream] = VLC_FALSE;
2114
2115     for( i_index = 0; i_index < p_idx1->i_entry_count; i_index++ )
2116     {
2117         unsigned int i_cat;
2118
2119         AVI_ParseStreamHeader( p_idx1->entry[i_index].i_fourcc,
2120                                &i_stream,
2121                                &i_cat );
2122         if( i_stream < p_sys->i_track &&
2123             i_cat == p_sys->track[i_stream]->i_cat )
2124         {
2125             avi_entry_t index;
2126             index.i_id      = p_idx1->entry[i_index].i_fourcc;
2127             index.i_flags   =
2128                 p_idx1->entry[i_index].i_flags&(~AVIIF_FIXKEYFRAME);
2129             index.i_pos     = p_idx1->entry[i_index].i_pos + i_offset;
2130             index.i_length  = p_idx1->entry[i_index].i_length;
2131             AVI_IndexAddEntry( p_sys, i_stream, &index );
2132
2133             if( index.i_flags&AVIIF_KEYFRAME )
2134                 b_keyset[i_stream] = VLC_TRUE;
2135         }
2136     }
2137
2138     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2139     {
2140         if( !b_keyset[i_stream] )
2141         {
2142             avi_track_t *tk = p_sys->track[i_stream];
2143
2144             msg_Dbg( p_demux, "no key frame set for track %d", i_stream );
2145             for( i_index = 0; i_index < tk->i_idxnb; i_index++ )
2146                 tk->p_index[i_index].i_flags |= AVIIF_KEYFRAME;
2147         }
2148     }
2149     return VLC_SUCCESS;
2150 }
2151
2152 static void __Parse_indx( demux_t    *p_demux,
2153                           int               i_stream,
2154                           avi_chunk_indx_t  *p_indx )
2155 {
2156     demux_sys_t         *p_sys    = p_demux->p_sys;
2157     avi_entry_t     index;
2158     int32_t             i;
2159
2160     msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_entriesinuse );
2161     if( p_indx->i_indexsubtype == 0 )
2162     {
2163         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2164         {
2165             index.i_id      = p_indx->i_id;
2166             index.i_flags   = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2167             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.std[i].i_offset - 8;
2168             index.i_length  = p_indx->idx.std[i].i_size&0x7fffffff;
2169
2170             AVI_IndexAddEntry( p_sys, i_stream, &index );
2171         }
2172     }
2173     else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
2174     {
2175         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2176         {
2177             index.i_id      = p_indx->i_id;
2178             index.i_flags   = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2179             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.field[i].i_offset - 8;
2180             index.i_length  = p_indx->idx.field[i].i_size;
2181
2182             AVI_IndexAddEntry( p_sys, i_stream, &index );
2183         }
2184     }
2185     else
2186     {
2187         msg_Warn( p_demux, "unknown subtype index(0x%x)", p_indx->i_indexsubtype );
2188     }
2189 }
2190
2191 static void AVI_IndexLoad_indx( demux_t *p_demux )
2192 {
2193     demux_sys_t         *p_sys = p_demux->p_sys;
2194     unsigned int        i_stream;
2195     int32_t             i;
2196
2197     avi_chunk_list_t    *p_riff;
2198     avi_chunk_list_t    *p_hdrl;
2199
2200     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2201     p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
2202
2203     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2204     {
2205         avi_chunk_list_t    *p_strl;
2206         avi_chunk_indx_t    *p_indx;
2207
2208 #define p_stream  p_sys->track[i_stream]
2209         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i_stream );
2210         p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0 );
2211
2212         if( !p_indx )
2213         {
2214             msg_Warn( p_demux, "cannot find indx (misdetect/broken OpenDML "
2215                                "file?)" );
2216             continue;
2217         }
2218
2219         if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS )
2220         {
2221             __Parse_indx( p_demux, i_stream, p_indx );
2222         }
2223         else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
2224         {
2225             avi_chunk_t    ck_sub;
2226             for( i = 0; i < p_indx->i_entriesinuse; i++ )
2227             {
2228                 if( stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset )||
2229                     AVI_ChunkRead( p_demux->s, &ck_sub, NULL  ) )
2230                 {
2231                     break;
2232                 }
2233                 __Parse_indx( p_demux, i_stream, &ck_sub.indx );
2234             }
2235         }
2236         else
2237         {
2238             msg_Warn( p_demux, "unknown type index(0x%x)", p_indx->i_indextype );
2239         }
2240 #undef p_stream
2241     }
2242 }
2243
2244 static void AVI_IndexLoad( demux_t *p_demux )
2245 {
2246     demux_sys_t *p_sys = p_demux->p_sys;
2247     unsigned int i_stream;
2248
2249     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2250     {
2251         p_sys->track[i_stream]->i_idxnb  = 0;
2252         p_sys->track[i_stream]->i_idxmax = 0;
2253         p_sys->track[i_stream]->p_index  = NULL;
2254     }
2255
2256     if( p_sys->b_odml )
2257     {
2258         AVI_IndexLoad_indx( p_demux );
2259     }
2260     else  if( AVI_IndexLoad_idx1( p_demux ) )
2261     {
2262         /* try indx if idx1 failed as some "normal" file have indx too */
2263         AVI_IndexLoad_indx( p_demux );
2264     }
2265
2266     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2267     {
2268         msg_Dbg( p_demux, "stream[%d] created %d index entries",
2269                 i_stream, p_sys->track[i_stream]->i_idxnb );
2270     }
2271 }
2272
2273 static void AVI_IndexCreate( demux_t *p_demux )
2274 {
2275     demux_sys_t *p_sys = p_demux->p_sys;
2276
2277     avi_chunk_list_t    *p_riff;
2278     avi_chunk_list_t    *p_movi;
2279
2280     unsigned int i_stream;
2281     off_t i_movi_end;
2282
2283     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2284     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2285
2286     if( !p_movi )
2287     {
2288         msg_Err( p_demux, "cannot find p_movi" );
2289         return;
2290     }
2291
2292     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2293     {
2294         p_sys->track[i_stream]->i_idxnb  = 0;
2295         p_sys->track[i_stream]->i_idxmax = 0;
2296         p_sys->track[i_stream]->p_index  = NULL;
2297     }
2298     i_movi_end = __MIN( (off_t)(p_movi->i_chunk_pos + p_movi->i_chunk_size),
2299                         stream_Size( p_demux->s ) );
2300
2301     stream_Seek( p_demux->s, p_movi->i_chunk_pos + 12 );
2302     msg_Warn( p_demux, "creating index from LIST-movi, will take time !" );
2303
2304
2305     /* Only show dialog if AVI is > 10MB */
2306     p_demux->p_sys->i_dialog_id = -1;
2307     if( stream_Size( p_demux->s ) > 10000000 )
2308     {
2309         p_demux->p_sys->i_dialog_id = intf_IntfProgress( p_demux,
2310                                         _( "Fixing AVI Index..." ),
2311                                         0.0 );
2312         p_demux->p_sys->last_update = mdate();
2313     }
2314
2315     for( ;; )
2316     {
2317         avi_packet_t pk;
2318
2319         if( p_demux->b_die )
2320         {
2321             return;
2322         }
2323
2324         /* Don't update dialog too often */
2325         if( p_demux->p_sys->i_dialog_id > 0 &&
2326             mdate() - p_demux->p_sys->last_update > 100000 )
2327         {
2328             int64_t i_pos = stream_Tell( p_demux->s )* 100 /
2329                             stream_Size( p_demux->s );
2330             float f_pos = (float)i_pos;
2331             p_demux->p_sys->last_update = mdate();
2332             intf_ProgressUpdate( p_demux, p_demux->p_sys->i_dialog_id,
2333                                  _( "Fixing AVI Index..." ), f_pos, -1 );
2334         }
2335
2336         if( AVI_PacketGetHeader( p_demux, &pk ) )
2337         {
2338             break;
2339         }
2340         if( pk.i_stream < p_sys->i_track &&
2341             pk.i_cat == p_sys->track[pk.i_stream]->i_cat )
2342         {
2343             avi_entry_t index;
2344             index.i_id      = pk.i_fourcc;
2345             index.i_flags   =
2346                AVI_GetKeyFlag(p_sys->track[pk.i_stream]->i_codec, pk.i_peek);
2347             index.i_pos     = pk.i_pos;
2348             index.i_length  = pk.i_size;
2349             AVI_IndexAddEntry( p_sys, pk.i_stream, &index );
2350         }
2351         else
2352         {
2353             switch( pk.i_fourcc )
2354             {
2355                 case AVIFOURCC_idx1:
2356                     if( p_sys->b_odml )
2357                     {
2358                         avi_chunk_list_t *p_sysx;
2359                         p_sysx = AVI_ChunkFind( &p_sys->ck_root,
2360                                                 AVIFOURCC_RIFF, 1 );
2361
2362                         msg_Dbg( p_demux, "looking for new RIFF chunk" );
2363                         if( stream_Seek( p_demux->s, p_sysx->i_chunk_pos + 24))
2364                         {
2365                             goto print_stat;
2366                         }
2367                         break;
2368                     }
2369                     goto print_stat;
2370                 case AVIFOURCC_RIFF:
2371                         msg_Dbg( p_demux, "new RIFF chunk found" );
2372                 case AVIFOURCC_rec:
2373                 case AVIFOURCC_JUNK:
2374                     break;
2375                 default:
2376                     msg_Warn( p_demux, "need resync, probably broken avi" );
2377                     if( AVI_PacketSearch( p_demux ) )
2378                     {
2379                         msg_Warn( p_demux, "lost sync, abord index creation" );
2380                         goto print_stat;
2381                     }
2382             }
2383         }
2384
2385         if( ( !p_sys->b_odml && pk.i_pos + pk.i_size >= i_movi_end ) ||
2386             AVI_PacketNext( p_demux ) )
2387         {
2388             break;
2389         }
2390     }
2391
2392 print_stat:
2393     if( p_demux->p_sys->i_dialog_id > 0 )
2394     {
2395         intf_UserHide( p_demux, p_demux->p_sys->i_dialog_id );
2396     }
2397
2398     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2399     {
2400         msg_Dbg( p_demux,
2401                 "stream[%d] creating %d index entries",
2402                 i_stream,
2403                 p_sys->track[i_stream]->i_idxnb );
2404     }
2405 }
2406
2407 /*****************************************************************************
2408  * Stream management
2409  *****************************************************************************/
2410 static int AVI_TrackStopFinishedStreams( demux_t *p_demux )
2411 {
2412     demux_sys_t *p_sys = p_demux->p_sys;
2413     unsigned int i;
2414     int b_end = VLC_TRUE;
2415
2416     for( i = 0; i < p_sys->i_track; i++ )
2417     {
2418         avi_track_t *tk = p_sys->track[i];
2419         if( tk->i_idxposc >= tk->i_idxnb )
2420         {
2421             tk->b_activated = VLC_FALSE;
2422             if( tk->p_es ) es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE, tk->p_es, VLC_FALSE );
2423         }
2424         else
2425         {
2426             b_end = VLC_FALSE;
2427         }
2428     }
2429     return( b_end );
2430 }
2431
2432 /****************************************************************************
2433  * AVI_MovieGetLength give max streams length in second
2434  ****************************************************************************/
2435 static mtime_t  AVI_MovieGetLength( demux_t *p_demux )
2436 {
2437     demux_sys_t  *p_sys = p_demux->p_sys;
2438     mtime_t      i_maxlength = 0;
2439     unsigned int i;
2440
2441     for( i = 0; i < p_sys->i_track; i++ )
2442     {
2443         avi_track_t *tk = p_sys->track[i];
2444         mtime_t i_length;
2445
2446         /* fix length for each stream */
2447         if( tk->i_idxnb < 1 || !tk->p_index )
2448         {
2449             continue;
2450         }
2451
2452         if( tk->i_samplesize )
2453         {
2454             i_length = AVI_GetDPTS( tk,
2455                                     tk->p_index[tk->i_idxnb-1].i_lengthtotal +
2456                                         tk->p_index[tk->i_idxnb-1].i_length );
2457         }
2458         else
2459         {
2460             i_length = AVI_GetDPTS( tk, tk->i_idxnb );
2461         }
2462         i_length /= (mtime_t)1000000;    /* in seconds */
2463
2464         msg_Dbg( p_demux,
2465                  "stream[%d] length:"I64Fd" (based on index)",
2466                  i,
2467                  i_length );
2468         i_maxlength = __MAX( i_maxlength, i_length );
2469     }
2470
2471     return i_maxlength;
2472 }