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 #include <stdlib.h>                                      /* malloc(), free() */
  27
  28 #include <vlc/vlc.h>
  29 #include <vlc_demux.h>
  30
  31 #include <vlc_interface.h>
  32
  33 #include <vlc_meta.h>
  34 #include <vlc_codecs.h>
  35 #include <vlc_charset.h>
  36
  37 #include "libavi.h"
  38
  39 /*****************************************************************************
  40  * Module descriptor
  41  *****************************************************************************/
  42
  43 #define INTERLEAVE_TEXT N_("Force interleaved method" )
  44 #define INTERLEAVE_LONGTEXT N_( "Force interleaved method." )
  45
  46 #define INDEX_TEXT N_("Force index creation")
  47 #define INDEX_LONGTEXT N_( \
  48     "Recreate a index for the AVI file. Use this if your AVI file is damaged "\
  49     "or incomplete (not seekable)." )
  50
  51 static int  Open ( vlc_object_t * );
  52 static void Close( vlc_object_t * );
  53
  54 static int pi_index[] = {0,1,2};
  55
  56 static const char *ppsz_indexes[] = { N_("Ask"), N_("Always fix"),
  57                                 N_("Never fix") };
  58
  59 vlc_module_begin();
  60     set_shortname( "AVI" );
  61     set_description( _("AVI demuxer") );
  62     set_capability( "demux2", 212 );
  63     set_category( CAT_INPUT );
  64     set_subcategory( SUBCAT_INPUT_DEMUX );
  65
  66     add_bool( "avi-interleaved", 0, NULL,
  67               INTERLEAVE_TEXT, INTERLEAVE_LONGTEXT, VLC_TRUE );
  68     add_integer( "avi-index", 0, NULL,
  69               INDEX_TEXT, INDEX_LONGTEXT, VLC_FALSE );
  70         change_integer_list( pi_index, ppsz_indexes, 0 );
  71
  72     set_callbacks( Open, Close );
  73 vlc_module_end();
  74
  75 /*****************************************************************************
  76  * Local prototypes
  77  *****************************************************************************/
  78 static int Control         ( demux_t *, int, va_list );
  79 static int Seek            ( demux_t *, mtime_t, int );
  80 static int Demux_Seekable  ( demux_t * );
  81 static int Demux_UnSeekable( demux_t * );
  82
  83 #define __ABS( x ) ( (x) < 0 ? (-(x)) : (x) )
  84
  85 typedef struct
  86 {
  87     vlc_fourcc_t i_fourcc;
  88     off_t        i_pos;
  89     uint32_t     i_size;
  90     vlc_fourcc_t i_type;     /* only for AVIFOURCC_LIST */
  91
  92     uint8_t      i_peek[8];  /* first 8 bytes */
  93
  94     unsigned int i_stream;
  95     unsigned int i_cat;
  96 } avi_packet_t;
  97
  98
  99 typedef struct
 100 {
 101     vlc_fourcc_t i_id;
 102     uint32_t     i_flags;
 103     off_t        i_pos;
 104     uint32_t     i_length;
 105     uint32_t     i_lengthtotal;
 106
 107 } avi_entry_t;
 108
 109 typedef struct
 110 {
 111     vlc_bool_t      b_activated;
 112
 113     unsigned int    i_cat; /* AUDIO_ES, VIDEO_ES */
 114     vlc_fourcc_t    i_codec;
 115
 116     int             i_rate;
 117     int             i_scale;
 118     int             i_samplesize;
 119
 120     es_out_id_t     *p_es;
 121
 122     /* Avi Index */
 123     avi_entry_t     *p_index;
 124     unsigned int    i_idxnb;
 125     unsigned int    i_idxmax;
 126
 127     unsigned int    i_idxposc;  /* numero of chunk */
 128     unsigned int    i_idxposb;  /* byte in the current chunk */
 129
 130     /* For VBR audio only */
 131     unsigned int    i_blockno;
 132     unsigned int    i_blocksize;
 133
 134     /* For muxed streams */
 135     stream_t        *p_out_muxed;
 136 } avi_track_t;
 137
 138 struct demux_sys_t
 139 {
 140     mtime_t i_time;
 141     mtime_t i_length;
 142
 143     vlc_bool_t  b_seekable;
 144     vlc_bool_t  b_muxed;
 145     avi_chunk_t ck_root;
 146
 147     vlc_bool_t  b_odml;
 148
 149     off_t   i_movi_begin;
 150     off_t   i_movi_lastchunk_pos;   /* XXX position of last valid chunk */
 151
 152     /* number of streams and information */
 153     unsigned int i_track;
 154     avi_track_t  **track;
 155
 156     /* meta */
 157     vlc_meta_t  *meta;
 158
 159     /* Progress box */
 160     mtime_t    last_update;
 161     int        i_dialog_id;
 162 };
 163
 164 static inline off_t __EVEN( off_t i )
 165 {
 166     return (i & 1) ? i + 1 : i;
 167 }
 168
 169 static mtime_t AVI_PTSToChunk( avi_track_t *, mtime_t i_pts );
 170 static mtime_t AVI_PTSToByte ( avi_track_t *, mtime_t i_pts );
 171 static mtime_t AVI_GetDPTS   ( avi_track_t *, int64_t i_count );
 172 static mtime_t AVI_GetPTS    ( avi_track_t * );
 173
 174
 175 static int AVI_StreamChunkFind( demux_t *, unsigned int i_stream );
 176 static int AVI_StreamChunkSet ( demux_t *,
 177                                 unsigned int i_stream, unsigned int i_ck );
 178 static int AVI_StreamBytesSet ( demux_t *,
 179                                 unsigned int i_stream, off_t   i_byte );
 180
 181 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t );
 182 static int   AVI_GetKeyFlag    ( vlc_fourcc_t , uint8_t * );
 183
 184 static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk );
 185 static int AVI_PacketNext     ( demux_t * );
 186 static int AVI_PacketRead     ( demux_t *, avi_packet_t *, block_t **);
 187 static int AVI_PacketSearch   ( demux_t * );
 188
 189 static void AVI_IndexLoad    ( demux_t * );
 190 static void AVI_IndexCreate  ( demux_t * );
 191 static void AVI_IndexAddEntry( demux_sys_t *, int, avi_entry_t * );
 192
 193 static mtime_t  AVI_MovieGetLength( demux_t * );
 194
 195 /*****************************************************************************
 196  * Stream management
 197  *****************************************************************************/
 198 static int        AVI_TrackSeek  ( demux_t *, int, mtime_t );
 199 static int        AVI_TrackStopFinishedStreams( demux_t *);
 200
 201 /* Remarks:
 202  - For VBR mp3 stream:
 203     count blocks by rounded-up chunksizes instead of chunks
 204     we need full emulation of dshow avi demuxer bugs :(
 205     fixes silly nandub-style a-v delaying in avi with vbr mp3...
 206     (from mplayer 2002/08/02)
 207  - to complete....
 208  */
 209
 210 /*****************************************************************************
 211  * Open: check file and initializes AVI structures
 212  *****************************************************************************/
 213 static int Open( vlc_object_t * p_this )
 214 {
 215     demux_t  *p_demux = (demux_t *)p_this;
 216     demux_sys_t     *p_sys;
 217
 218     vlc_bool_t       b_index = VLC_FALSE;
 219     int              i_do_index;
 220
 221     avi_chunk_t         ck_riff;
 222     avi_chunk_list_t    *p_riff = (avi_chunk_list_t*)&ck_riff;
 223     avi_chunk_list_t    *p_hdrl, *p_movi;
 224     avi_chunk_avih_t    *p_avih;
 225
 226     unsigned int i_track;
 227     unsigned int i, i_peeker;
 228
 229     uint8_t  *p_peek;
 230
 231     /* Is it an avi file ? */
 232     if( stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC;
 233
 234     for( i_peeker = 0; i_peeker < 188; i_peeker++ )
 235     {
 236         if( !strncmp( (char *)&p_peek[0], "RIFF", 4 ) &&
 237             !strncmp( (char *)&p_peek[8], "AVI ", 4 ) ) break;
 238         p_peek++;
 239     }
 240     if( i_peeker == 188 )
 241     {
 242         return VLC_EGENERIC;
 243     }
 244
 245     /* Initialize input  structures. */
 246     p_sys = p_demux->p_sys = malloc( sizeof(demux_sys_t) );
 247     memset( p_sys, 0, sizeof( demux_sys_t ) );
 248     p_sys->i_time   = 0;
 249     p_sys->i_length = 0;
 250     p_sys->i_movi_lastchunk_pos = 0;
 251     p_sys->b_odml   = VLC_FALSE;
 252     p_sys->b_muxed  = VLC_FALSE;
 253     p_sys->i_track  = 0;
 254     p_sys->track    = NULL;
 255     p_sys->meta     = NULL;
 256
 257     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_seekable );
 258
 259     p_demux->pf_control = Control;
 260     p_demux->pf_demux = Demux_Seekable;
 261
 262     /* For unseekable stream, automaticaly use Demux_UnSeekable */
 263     if( !p_sys->b_seekable || config_GetInt( p_demux, "avi-interleaved" ) )
 264     {
 265         p_demux->pf_demux = Demux_UnSeekable;
 266     }
 267
 268     if( i_peeker > 0 )
 269     {
 270         stream_Read( p_demux->s, NULL, i_peeker );
 271     }
 272
 273     if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) )
 274     {
 275         msg_Err( p_demux, "avi module discarded (invalid file)" );
 276         return VLC_EGENERIC;
 277     }
 278
 279     if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF ) > 1 )
 280     {
 281         unsigned int i_count =
 282             AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF );
 283
 284         msg_Warn( p_demux, "multiple riff -> OpenDML ?" );
 285         for( i = 1; i < i_count; i++ )
 286         {
 287             avi_chunk_list_t *p_sysx;
 288
 289             p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i );
 290             if( p_sysx->i_type == AVIFOURCC_AVIX )
 291             {
 292                 msg_Warn( p_demux, "detected OpenDML file" );
 293                 p_sys->b_odml = VLC_TRUE;
 294                 break;
 295             }
 296         }
 297     }
 298
 299     p_riff  = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0 );
 300     p_hdrl  = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
 301     p_movi  = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0 );
 302
 303     if( !p_hdrl || !p_movi )
 304     {
 305         msg_Err( p_demux, "avi module discarded (invalid file)" );
 306         goto error;
 307     }
 308
 309     if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0 ) ) )
 310     {
 311         msg_Err( p_demux, "cannot find avih chunk" );
 312         goto error;
 313     }
 314     i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl );
 315     if( p_avih->i_streams != i_track )
 316     {
 317         msg_Warn( p_demux,
 318                   "found %d stream but %d are declared",
 319                   i_track, p_avih->i_streams );
 320     }
 321     if( i_track == 0 )
 322     {
 323         msg_Err( p_demux, "no stream defined!" );
 324         goto error;
 325     }
 326
 327     /* print information on streams */
 328     msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ",
 329              i_track,
 330              p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 331              p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 332              p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 333              p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 334     if( ( p_sys->meta = vlc_meta_New() ) )
 335     {
 336         char buffer[200];
 337         sprintf( buffer, "%s%s%s%s",
 338                  p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 339                  p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 340                  p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 341                  p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 342         vlc_meta_SetSetting( p_sys->meta, buffer );
 343     }
 344
 345     /* now read info on each stream and create ES */
 346     for( i = 0 ; i < i_track; i++ )
 347     {
 348         avi_track_t           *tk     = malloc( sizeof( avi_track_t ) );
 349         avi_chunk_list_t      *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 350         avi_chunk_strh_t      *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 351         avi_chunk_STRING_t    *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0 );
 352         avi_chunk_strf_auds_t *p_auds = NULL;
 353         avi_chunk_strf_vids_t *p_vids = NULL;
 354         es_format_t fmt;
 355
 356         tk->b_activated = VLC_FALSE;
 357         tk->p_index     = 0;
 358         tk->i_idxnb     = 0;
 359         tk->i_idxmax    = 0;
 360         tk->i_idxposc   = 0;
 361         tk->i_idxposb   = 0;
 362
 363         tk->i_blockno   = 0;
 364         tk->i_blocksize = 0;
 365
 366         tk->p_es        = NULL;
 367         tk->p_out_muxed = NULL;
 368
 369         p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 370         p_auds = (avi_chunk_strf_auds_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 371
 372         if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
 373         {
 374             msg_Warn( p_demux, "stream[%d] incomplete", i );
 375             continue;
 376         }
 377
 378         tk->i_rate  = p_strh->i_rate;
 379         tk->i_scale = p_strh->i_scale;
 380         tk->i_samplesize = p_strh->i_samplesize;
 381         msg_Dbg( p_demux, "stream[%d] rate:%d scale:%d samplesize:%d",
 382                  i, tk->i_rate, tk->i_scale, tk->i_samplesize );
 383
 384         switch( p_strh->i_type )
 385         {
 386             case( AVIFOURCC_auds ):
 387                 tk->i_cat   = AUDIO_ES;
 388                 tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
 389                                                   p_auds->p_wf->wFormatTag );
 390                 if( ( tk->i_blocksize = p_auds->p_wf->nBlockAlign ) == 0 )
 391                 {
 392                     if( p_auds->p_wf->wFormatTag == 1 )
 393                     {
 394                         tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
 395                     }
 396                     else
 397                     {
 398                         tk->i_blocksize = 1;
 399                     }
 400                 }
 401                 es_format_Init( &fmt, AUDIO_ES, tk->i_codec );
 402
 403                 fmt.audio.i_channels        = p_auds->p_wf->nChannels;
 404                 fmt.audio.i_rate            = p_auds->p_wf->nSamplesPerSec;
 405                 fmt.i_bitrate               = p_auds->p_wf->nAvgBytesPerSec*8;
 406                 fmt.audio.i_blockalign      = p_auds->p_wf->nBlockAlign;
 407                 fmt.audio.i_bitspersample   = p_auds->p_wf->wBitsPerSample;
 408                 fmt.i_extra = __MIN( p_auds->p_wf->cbSize,
 409                     p_auds->i_chunk_size - sizeof(WAVEFORMATEX) );
 410                 fmt.p_extra = &p_auds->p_wf[1];
 411                 msg_Dbg( p_demux, "stream[%d] audio(0x%x) %d channels %dHz %dbits",
 412                          i, p_auds->p_wf->wFormatTag, p_auds->p_wf->nChannels,
 413                          p_auds->p_wf->nSamplesPerSec, p_auds->p_wf->wBitsPerSample);
 414                 break;
 415
 416             case( AVIFOURCC_vids ):
 417                 tk->i_cat   = VIDEO_ES;
 418                 tk->i_codec = AVI_FourccGetCodec( VIDEO_ES,
 419                                                   p_vids->p_bih->biCompression );
 420                 if( p_vids->p_bih->biCompression == 0x00 )
 421                 {
 422                     switch( p_vids->p_bih->biBitCount )
 423                     {
 424                         case 32:
 425                             tk->i_codec = VLC_FOURCC('R','V','3','2');
 426                             break;
 427                         case 24:
 428                             tk->i_codec = VLC_FOURCC('R','V','2','4');
 429                             break;
 430                         case 16:
 431                             /* tk->i_codec = VLC_FOURCC('R','V','1','6');*/
 432                             /* break;*/
 433                         case 15:
 434                             tk->i_codec = VLC_FOURCC('R','V','1','5');
 435                             break;
 436                         case 9:
 437                             tk->i_codec = VLC_FOURCC( 'Y', 'V', 'U', '9' ); /* <- TODO check that */
 438                             break;
 439                     }
 440                     es_format_Init( &fmt, VIDEO_ES, tk->i_codec );
 441
 442                     if( p_vids->p_bih->biBitCount == 24 )
 443                     {
 444                         /* This is in BGR format */
 445                         fmt.video.i_bmask = 0x00ff0000;
 446                         fmt.video.i_gmask = 0x0000ff00;
 447                         fmt.video.i_rmask = 0x000000ff;
 448                     }
 449                 }
 450                 else
 451                 {
 452                     es_format_Init( &fmt, VIDEO_ES, p_vids->p_bih->biCompression );
 453                     if( tk->i_codec == FOURCC_mp4v &&
 454                         !strncasecmp( (char*)&p_strh->i_handler, "XVID", 4 ) )
 455                     {
 456                         fmt.i_codec = VLC_FOURCC( 'X', 'V', 'I', 'D' );
 457                     }
 458                 }
 459                 tk->i_samplesize = 0;
 460                 fmt.video.i_width  = p_vids->p_bih->biWidth;
 461                 fmt.video.i_height = p_vids->p_bih->biHeight;
 462                 fmt.video.i_bits_per_pixel = p_vids->p_bih->biBitCount;
 463                 fmt.video.i_frame_rate = tk->i_rate;
 464                 fmt.video.i_frame_rate_base = tk->i_scale;
 465                 fmt.i_extra =
 466                     __MIN( p_vids->p_bih->biSize - sizeof( BITMAPINFOHEADER ),
 467                            p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER) );
 468                 fmt.p_extra = &p_vids->p_bih[1];
 469                 msg_Dbg( p_demux, "stream[%d] video(%4.4s) %dx%d %dbpp %ffps",
 470                          i, (char*)&p_vids->p_bih->biCompression,
 471                          p_vids->p_bih->biWidth,
 472                          p_vids->p_bih->biHeight,
 473                          p_vids->p_bih->biBitCount,
 474                          (float)tk->i_rate/(float)tk->i_scale );
 475
 476                 if( p_vids->p_bih->biCompression == 0x00 )
 477                 {
 478                     /* RGB DIB are coded from bottom to top */
 479                     fmt.video.i_height =
 480                         (unsigned int)(-(int)p_vids->p_bih->biHeight);
 481                 }
 482
 483                 /* Extract palette from extradata if bpp <= 8
 484                  * (assumes that extradata contains only palette but appears
 485                  *  to be true for all palettized codecs we support) */
 486                 if( fmt.i_extra && fmt.video.i_bits_per_pixel <= 8 &&
 487                     fmt.video.i_bits_per_pixel > 0 )
 488                 {
 489                     int i;
 490
 491                     fmt.video.p_palette = calloc( sizeof(video_palette_t), 1 );
 492                     fmt.video.p_palette->i_entries = 1;
 493
 494                     /* Apparently this is necessary. But why ? */
 495                     fmt.i_extra =
 496                         p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER);
 497                     for( i = 0; i < __MIN(fmt.i_extra/4, 256); i++ )
 498                     {
 499                         ((uint32_t *)&fmt.video.p_palette->palette[0][0])[i] =
 500                             GetDWLE((uint32_t*)fmt.p_extra + i);
 501                     }
 502                 }
 503                 break;
 504
 505             case( AVIFOURCC_txts):
 506                 tk->i_cat   = SPU_ES;
 507                 tk->i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
 508                 msg_Dbg( p_demux, "stream[%d] subtitles", i );
 509                 es_format_Init( &fmt, SPU_ES, tk->i_codec );
 510                 break;
 511
 512             case( AVIFOURCC_iavs):
 513             case( AVIFOURCC_ivas):
 514                 p_sys->b_muxed = VLC_TRUE;
 515                 msg_Dbg( p_demux, "stream[%d] iavs with handler %4.4s", i, (char *)&p_strh->i_handler );
 516                 if( p_strh->i_handler == FOURCC_dvsd ||
 517                     p_strh->i_handler == FOURCC_dvhd ||
 518                     p_strh->i_handler == FOURCC_dvsl )
 519                 {
 520                     tk->p_out_muxed = stream_DemuxNew( p_demux, (char *)"rawdv", p_demux->out );
 521                     if( !tk->p_out_muxed )
 522                         msg_Err( p_demux, "could not load the DV parser" );
 523                     else break;
 524                 }
 525                 free( tk );
 526                 continue;
 527
 528             case( AVIFOURCC_mids):
 529                 msg_Dbg( p_demux, "stream[%d] midi is UNSUPPORTED", i );
 530
 531             default:
 532                 msg_Warn( p_demux, "stream[%d] unknown type %4.4s", i, (char *)&p_strh->i_type );
 533                 free( tk );
 534                 continue;
 535         }
 536         if( p_strn )
 537         {
 538             /* The charset of p_strn is undefined */
 539             EnsureUTF8( p_strn->p_str );
 540             fmt.psz_description = strdup( p_strn->p_str );
 541         }
 542         if( tk->p_out_muxed == NULL )
 543             tk->p_es = es_out_Add( p_demux->out, &fmt );
 544         TAB_APPEND( p_sys->i_track, p_sys->track, tk );
 545     }
 546
 547     if( p_sys->i_track <= 0 )
 548     {
 549         msg_Err( p_demux, "no valid track" );
 550         goto error;
 551     }
 552
 553     i_do_index =  config_GetInt( p_demux, "avi-index" );
 554     if( i_do_index == 1 ) /* Always fix */
 555     {
 556 aviindex:
 557         if( p_sys->b_seekable )
 558         {
 559             AVI_IndexCreate( p_demux );
 560         }
 561         else
 562         {
 563             msg_Warn( p_demux, "cannot create index (unseekable stream)" );
 564             AVI_IndexLoad( p_demux );
 565         }
 566     }
 567     else
 568     {
 569         AVI_IndexLoad( p_demux );
 570     }
 571
 572     /* *** movie length in sec *** */
 573     p_sys->i_length = AVI_MovieGetLength( p_demux );
 574     if( p_sys->i_length < (mtime_t)p_avih->i_totalframes *
 575                           (mtime_t)p_avih->i_microsecperframe /
 576                           (mtime_t)1000000 )
 577     {
 578         msg_Warn( p_demux, "broken or missing index, 'seek' will be "
 579                            "axproximative or will have strange behaviour" );
 580         if( i_do_index == 0 && !b_index )
 581         {
 582             int i_create;
 583             i_create = intf_UserYesNo( p_demux, _("AVI Index") ,
 584                         _( "This AVI file is broken. Seeking will not "
 585                         "work correctly.\nDo you want to "
 586                         "try to repair it (this might take a long time) ?" ),
 587                         _( "Repair" ), _( "Don't repair" ), _( "Cancel") );
 588             if( i_create == DIALOG_OK_YES )
 589             {
 590                 b_index = VLC_TRUE;
 591                 msg_Dbg( p_demux, "Fixing AVI index" );
 592                 goto aviindex;
 593             }
 594             else if( i_create == DIALOG_CANCELLED )
 595             {
 596                 /* Kill input */
 597                 vlc_object_kill( p_demux->p_parent );
 598                 goto error;
 599             }
 600         }
 601     }
 602
 603     /* fix some BeOS MediaKit generated file */
 604     for( i = 0 ; i < p_sys->i_track; i++ )
 605     {
 606         avi_track_t         *tk = p_sys->track[i];
 607         avi_chunk_list_t    *p_strl;
 608         avi_chunk_strh_t    *p_strh;
 609         avi_chunk_strf_auds_t    *p_auds;
 610
 611         if( tk->i_cat != AUDIO_ES )
 612         {
 613             continue;
 614         }
 615         if( tk->i_idxnb < 1 ||
 616             tk->i_scale != 1 ||
 617             tk->i_samplesize != 0 )
 618         {
 619             continue;
 620         }
 621         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 622         p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 623         p_auds = AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 624
 625         if( p_auds->p_wf->wFormatTag != WAVE_FORMAT_PCM &&
 626             (unsigned int)tk->i_rate == p_auds->p_wf->nSamplesPerSec )
 627         {
 628             int64_t i_track_length =
 629                 tk->p_index[tk->i_idxnb-1].i_length +
 630                 tk->p_index[tk->i_idxnb-1].i_lengthtotal;
 631             mtime_t i_length = (mtime_t)p_avih->i_totalframes *
 632                                (mtime_t)p_avih->i_microsecperframe;
 633
 634             if( i_length == 0 )
 635             {
 636                 msg_Warn( p_demux, "track[%d] cannot be fixed (BeOS MediaKit generated)", i );
 637                 continue;
 638             }
 639             tk->i_samplesize = 1;
 640             tk->i_rate       = i_track_length  * (int64_t)1000000/ i_length;
 641             msg_Warn( p_demux, "track[%d] fixed with rate=%d scale=%d (BeOS MediaKit generated)", i, tk->i_rate, tk->i_scale );
 642         }
 643     }
 644
 645     if( p_sys->b_seekable )
 646     {
 647         /* we have read all chunk so go back to movi */
 648         stream_Seek( p_demux->s, p_movi->i_chunk_pos );
 649     }
 650     /* Skip movi header */
 651     stream_Read( p_demux->s, NULL, 12 );
 652
 653     p_sys->i_movi_begin = p_movi->i_chunk_pos;
 654     return VLC_SUCCESS;
 655
 656 error:
 657     if( p_sys->meta )
 658     {
 659         vlc_meta_Delete( p_sys->meta );
 660     }
 661     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 662     free( p_sys );
 663     return VLC_EGENERIC;
 664 }
 665
 666 /*****************************************************************************
 667  * Close: frees unused data
 668  *****************************************************************************/
 669 static void Close ( vlc_object_t * p_this )
 670 {
 671     demux_t *    p_demux = (demux_t *)p_this;
 672     unsigned int i;
 673     demux_sys_t *p_sys = p_demux->p_sys  ;
 674
 675     for( i = 0; i < p_sys->i_track; i++ )
 676     {
 677         if( p_sys->track[i] )
 678         {
 679             if( p_sys->track[i]->p_out_muxed )
 680                 stream_DemuxDelete( p_sys->track[i]->p_out_muxed );
 681             FREENULL( p_sys->track[i]->p_index );
 682             free( p_sys->track[i] );
 683         }
 684     }
 685     FREENULL( p_sys->track );
 686     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 687     vlc_meta_Delete( p_sys->meta );
 688
 689     free( p_sys );
 690 }
 691
 692 /*****************************************************************************
 693  * Demux_Seekable: reads and demuxes data packets for stream seekable
 694  *****************************************************************************
 695  * AVIDemux: reads and demuxes data packets
 696  *****************************************************************************
 697  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 698  *****************************************************************************/
 699 typedef struct
 700 {
 701     vlc_bool_t b_ok;
 702
 703     int i_toread;
 704
 705     off_t i_posf; /* where we will read :
 706                    if i_idxposb == 0 : begining of chunk (+8 to acces data)
 707                    else : point on data directly */
 708 } avi_track_toread_t;
 709
 710 static int Demux_Seekable( demux_t *p_demux )
 711 {
 712     demux_sys_t *p_sys = p_demux->p_sys;
 713
 714     unsigned int i_track_count = 0;
 715     unsigned int i_track;
 716     vlc_bool_t b_stream;
 717     /* cannot be more than 100 stream (dcXX or wbXX) */
 718     avi_track_toread_t toread[100];
 719
 720
 721     /* detect new selected/unselected streams */
 722     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 723     {
 724         avi_track_t *tk = p_sys->track[i_track];
 725         vlc_bool_t  b;
 726
 727         if( p_sys->b_muxed && tk->p_out_muxed )
 728         {
 729             i_track_count++;
 730             tk->b_activated = VLC_TRUE;
 731             continue;
 732         }
 733
 734         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 735         if( b && !tk->b_activated )
 736         {
 737             if( p_sys->b_seekable)
 738             {
 739                 AVI_TrackSeek( p_demux, i_track, p_sys->i_time );
 740             }
 741             tk->b_activated = VLC_TRUE;
 742         }
 743         else if( !b && tk->b_activated )
 744         {
 745             tk->b_activated = VLC_FALSE;
 746         }
 747         if( b )
 748         {
 749             i_track_count++;
 750         }
 751     }
 752
 753     if( i_track_count <= 0 )
 754     {
 755         int64_t i_length = p_sys->i_length * (mtime_t)1000000;
 756
 757         p_sys->i_time += 25*1000;  /* read 25ms */
 758         if( i_length > 0 )
 759         {
 760             if( p_sys->i_time >= i_length )
 761                 return 0;
 762             return 1;
 763         }
 764         msg_Warn( p_demux, "no track selected, exiting..." );
 765         return 0;
 766     }
 767
 768     /* wait for the good time */
 769     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
 770     p_sys->i_time += 25*1000;  /* read 25ms */
 771
 772     /* init toread */
 773     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 774     {
 775         avi_track_t *tk = p_sys->track[i_track];
 776         mtime_t i_dpts;
 777
 778         toread[i_track].b_ok = tk->b_activated;
 779         if( tk->i_idxposc < tk->i_idxnb )
 780         {
 781             toread[i_track].i_posf = tk->p_index[tk->i_idxposc].i_pos;
 782            if( tk->i_idxposb > 0 )
 783            {
 784                 toread[i_track].i_posf += 8 + tk->i_idxposb;
 785            }
 786         }
 787         else
 788         {
 789             toread[i_track].i_posf = -1;
 790         }
 791
 792         i_dpts = p_sys->i_time - AVI_GetPTS( tk  );
 793
 794         if( tk->i_samplesize )
 795         {
 796             toread[i_track].i_toread = AVI_PTSToByte( tk, __ABS( i_dpts ) );
 797         }
 798         else
 799         {
 800             toread[i_track].i_toread = AVI_PTSToChunk( tk, __ABS( i_dpts ) );
 801         }
 802
 803         if( i_dpts < 0 )
 804         {
 805             toread[i_track].i_toread *= -1;
 806         }
 807     }
 808
 809     b_stream = VLC_FALSE;
 810
 811     for( ;; )
 812     {
 813         avi_track_t     *tk;
 814         vlc_bool_t       b_done;
 815         block_t         *p_frame;
 816         off_t i_pos;
 817         unsigned int i;
 818         size_t i_size;
 819
 820         /* search for first chunk to be read */
 821         for( i = 0, b_done = VLC_TRUE, i_pos = -1; i < p_sys->i_track; i++ )
 822         {
 823             if( !toread[i].b_ok ||
 824                 AVI_GetDPTS( p_sys->track[i],
 825                              toread[i].i_toread ) <= -25 * 1000 )
 826             {
 827                 continue;
 828             }
 829
 830             if( toread[i].i_toread > 0 )
 831             {
 832                 b_done = VLC_FALSE; /* not yet finished */
 833             }
 834             if( toread[i].i_posf > 0 )
 835             {
 836                 if( i_pos == -1 || i_pos > toread[i].i_posf )
 837                 {
 838                     i_track = i;
 839                     i_pos = toread[i].i_posf;
 840                 }
 841             }
 842         }
 843
 844         if( b_done )
 845         {
 846             return( 1 );
 847         }
 848
 849         if( i_pos == -1 )
 850         {
 851             int i_loop_count = 0;
 852
 853             /* no valid index, we will parse directly the stream
 854              * in case we fail we will disable all finished stream */
 855             if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
 856             {
 857                 stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
 858                 if( AVI_PacketNext( p_demux ) )
 859                 {
 860                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 861                 }
 862             }
 863             else
 864             {
 865                 stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
 866             }
 867
 868             for( ;; )
 869             {
 870                 avi_packet_t avi_pk;
 871
 872                 if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
 873                 {
 874                     msg_Warn( p_demux,
 875                              "cannot get packet header, track disabled" );
 876                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 877                 }
 878                 if( avi_pk.i_stream >= p_sys->i_track ||
 879                     ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
 880                 {
 881                     if( AVI_PacketNext( p_demux ) )
 882                     {
 883                         msg_Warn( p_demux,
 884                                   "cannot skip packet, track disabled" );
 885                         return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 886                     }
 887
 888                     /* Prevents from eating all the CPU with broken files.
 889                      * This value should be low enough so that it doesn't
 890                      * affect the reading speed too much. */
 891                     if( !(++i_loop_count % 1024) )
 892                     {
 893                         if( p_demux->b_die ) return -1;
 894                         msleep( 10000 );
 895
 896                         if( !(i_loop_count % (1024 * 10)) )
 897                             msg_Warn( p_demux,
 898                                       "don't seem to find any data..." );
 899                     }
 900                     continue;
 901                 }
 902                 else
 903                 {
 904                     /* add this chunk to the index */
 905                     avi_entry_t index;
 906
 907                     index.i_id = avi_pk.i_fourcc;
 908                     index.i_flags =
 909                        AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
 910                                       avi_pk.i_peek);
 911                     index.i_pos = avi_pk.i_pos;
 912                     index.i_length = avi_pk.i_size;
 913                     AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
 914
 915                     i_track = avi_pk.i_stream;
 916                     tk = p_sys->track[i_track];
 917                     /* do we will read this data ? */
 918                     if( AVI_GetDPTS( tk, toread[i_track].i_toread ) > -25*1000 )
 919                     {
 920                         break;
 921                     }
 922                     else
 923                     {
 924                         if( AVI_PacketNext( p_demux ) )
 925                         {
 926                             msg_Warn( p_demux,
 927                                       "cannot skip packet, track disabled" );
 928                             return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 929                         }
 930                     }
 931                 }
 932             }
 933
 934         }
 935         else
 936         {
 937             stream_Seek( p_demux->s, i_pos );
 938         }
 939
 940         /* Set the track to use */
 941         tk = p_sys->track[i_track];
 942
 943         /* read thoses data */
 944         if( tk->i_samplesize )
 945         {
 946             unsigned int i_toread;
 947
 948             if( ( i_toread = toread[i_track].i_toread ) <= 0 )
 949             {
 950                 if( tk->i_samplesize > 1 )
 951                 {
 952                     i_toread = tk->i_samplesize;
 953                 }
 954                 else
 955                 {
 956                     i_toread = AVI_PTSToByte( tk, 20 * 1000 );
 957                     i_toread = __MAX( i_toread, 100 );
 958                 }
 959             }
 960             i_size = __MIN( tk->p_index[tk->i_idxposc].i_length -
 961                                 tk->i_idxposb,
 962                             i_toread );
 963         }
 964         else
 965         {
 966             i_size = tk->p_index[tk->i_idxposc].i_length;
 967         }
 968
 969         if( tk->i_idxposb == 0 )
 970         {
 971             i_size += 8; /* need to read and skip header */
 972         }
 973
 974         if( ( p_frame = stream_Block( p_demux->s, __EVEN( i_size ) ) )==NULL )
 975         {
 976             msg_Warn( p_demux, "failed reading data" );
 977             tk->b_activated = VLC_FALSE;
 978             toread[i_track].b_ok = VLC_FALSE;
 979             continue;
 980         }
 981         if( i_size % 2 )    /* read was padded on word boundary */
 982         {
 983             p_frame->i_buffer--;
 984         }
 985         /* skip header */
 986         if( tk->i_idxposb == 0 )
 987         {
 988             p_frame->p_buffer += 8;
 989             p_frame->i_buffer -= 8;
 990         }
 991         p_frame->i_pts = AVI_GetPTS( tk ) + 1;
 992         if( tk->p_index[tk->i_idxposc].i_flags&AVIIF_KEYFRAME )
 993         {
 994             p_frame->i_flags = BLOCK_FLAG_TYPE_I;
 995         }
 996         else
 997         {
 998             p_frame->i_flags = BLOCK_FLAG_TYPE_PB;
 999         }
1000
1001         /* read data */
1002         if( tk->i_samplesize )
1003         {
1004             if( tk->i_idxposb == 0 )
1005             {
1006                 i_size -= 8;
1007             }
1008             toread[i_track].i_toread -= i_size;
1009             tk->i_idxposb += i_size;
1010             if( tk->i_idxposb >=
1011                     tk->p_index[tk->i_idxposc].i_length )
1012             {
1013                 tk->i_idxposb = 0;
1014                 tk->i_idxposc++;
1015             }
1016         }
1017         else
1018         {
1019             int i_length = tk->p_index[tk->i_idxposc].i_length;
1020
1021             tk->i_idxposc++;
1022             if( tk->i_cat == AUDIO_ES )
1023             {
1024                 tk->i_blockno += tk->i_blocksize > 0 ? ( i_length + tk->i_blocksize - 1 ) / tk->i_blocksize : 1;
1025             }
1026             toread[i_track].i_toread--;
1027         }
1028
1029         if( tk->i_idxposc < tk->i_idxnb)
1030         {
1031             toread[i_track].i_posf =
1032                 tk->p_index[tk->i_idxposc].i_pos;
1033             if( tk->i_idxposb > 0 )
1034             {
1035                 toread[i_track].i_posf += 8 + tk->i_idxposb;
1036             }
1037
1038         }
1039         else
1040         {
1041             toread[i_track].i_posf = -1;
1042         }
1043
1044         b_stream = VLC_TRUE; /* at least one read succeed */
1045
1046         if( tk->i_cat != VIDEO_ES )
1047             p_frame->i_dts = p_frame->i_pts;
1048         else
1049         {
1050             p_frame->i_dts = p_frame->i_pts;
1051             p_frame->i_pts = 0;
1052         }
1053
1054         //p_pes->i_rate = p_demux->stream.control.i_rate;
1055         if( tk->p_out_muxed )
1056             stream_DemuxSend( tk->p_out_muxed, p_frame );
1057         else
1058             es_out_Send( p_demux->out, tk->p_es, p_frame );
1059     }
1060 }
1061
1062
1063 /*****************************************************************************
1064  * Demux_UnSeekable: reads and demuxes data packets for unseekable file
1065  *****************************************************************************
1066  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1067  *****************************************************************************/
1068 static int Demux_UnSeekable( demux_t *p_demux )
1069 {
1070     demux_sys_t     *p_sys = p_demux->p_sys;
1071     avi_track_t *p_stream_master = NULL;
1072     unsigned int i_stream;
1073     unsigned int i_packet;
1074
1075     if( p_sys->b_muxed )
1076     {
1077         msg_Err( p_demux, "Can not yet process muxed avi substreams without seeking" );
1078         return VLC_EGENERIC;
1079     }
1080
1081     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
1082
1083     /* *** find master stream for data packet skipping algo *** */
1084     /* *** -> first video, if any, or first audio ES *** */
1085     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1086     {
1087         avi_track_t *tk = p_sys->track[i_stream];
1088         vlc_bool_t  b;
1089
1090         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
1091
1092         if( b && tk->i_cat == VIDEO_ES )
1093         {
1094             p_stream_master = tk;
1095         }
1096         else if( b )
1097         {
1098             p_stream_master = tk;
1099         }
1100     }
1101
1102     if( !p_stream_master )
1103     {
1104         msg_Warn( p_demux, "no more stream selected" );
1105         return( 0 );
1106     }
1107
1108     p_sys->i_time = AVI_GetPTS( p_stream_master );
1109
1110     for( i_packet = 0; i_packet < 10; i_packet++)
1111     {
1112 #define p_stream    p_sys->track[avi_pk.i_stream]
1113
1114         avi_packet_t    avi_pk;
1115
1116         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1117         {
1118             return( 0 );
1119         }
1120
1121         if( avi_pk.i_stream >= p_sys->i_track ||
1122             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1123         {
1124             /* we haven't found an audio or video packet:
1125              *  - we have seek, found first next packet
1126              *  - others packets could be found, skip them
1127              */
1128             switch( avi_pk.i_fourcc )
1129             {
1130                 case AVIFOURCC_JUNK:
1131                 case AVIFOURCC_LIST:
1132                 case AVIFOURCC_RIFF:
1133                     return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1134                 case AVIFOURCC_idx1:
1135                     if( p_sys->b_odml )
1136                     {
1137                         return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1138                     }
1139                     return( 0 );    /* eof */
1140                 default:
1141                     msg_Warn( p_demux,
1142                               "seems to have lost position, resync" );
1143                     if( AVI_PacketSearch( p_demux ) )
1144                     {
1145                         msg_Err( p_demux, "resync failed" );
1146                         return( -1 );
1147                     }
1148             }
1149         }
1150         else
1151         {
1152             /* check for time */
1153             if( __ABS( AVI_GetPTS( p_stream ) -
1154                         AVI_GetPTS( p_stream_master ) )< 600*1000 )
1155             {
1156                 /* load it and send to decoder */
1157                 block_t *p_frame;
1158                 if( AVI_PacketRead( p_demux, &avi_pk, &p_frame ) || p_frame == NULL )
1159                 {
1160                     return( -1 );
1161                 }
1162                 p_frame->i_pts = AVI_GetPTS( p_stream ) + 1;
1163
1164                 if( avi_pk.i_cat != VIDEO_ES )
1165                     p_frame->i_dts = p_frame->i_pts;
1166                 else
1167                 {
1168                     p_frame->i_dts = p_frame->i_pts;
1169                     p_frame->i_pts = 0;
1170                 }
1171
1172                 //p_pes->i_rate = p_demux->stream.control.i_rate;
1173                 es_out_Send( p_demux->out, p_stream->p_es, p_frame );
1174             }
1175             else
1176             {
1177                 if( AVI_PacketNext( p_demux ) )
1178                 {
1179                     return( 0 );
1180                 }
1181             }
1182
1183             /* *** update stream time position *** */
1184             if( p_stream->i_samplesize )
1185             {
1186                 p_stream->i_idxposb += avi_pk.i_size;
1187             }
1188             else
1189             {
1190                 if( p_stream->i_cat == AUDIO_ES )
1191                 {
1192                     p_stream->i_blockno += p_stream->i_blocksize > 0 ? ( avi_pk.i_size + p_stream->i_blocksize - 1 ) / p_stream->i_blocksize : 1;
1193                 }
1194                 p_stream->i_idxposc++;
1195             }
1196
1197         }
1198 #undef p_stream
1199     }
1200
1201     return( 1 );
1202 }
1203
1204 /*****************************************************************************
1205  * Seek: goto to i_date or i_percent
1206  *****************************************************************************/
1207 static int Seek( demux_t *p_demux, mtime_t i_date, int i_percent )
1208 {
1209
1210     demux_sys_t *p_sys = p_demux->p_sys;
1211     unsigned int i_stream;
1212     msg_Dbg( p_demux, "seek requested: "I64Fd" seconds %d%%",
1213              i_date / 1000000, i_percent );
1214
1215     if( p_sys->b_seekable )
1216     {
1217         if( !p_sys->i_length )
1218         {
1219             avi_track_t *p_stream;
1220             int64_t i_pos;
1221
1222             /* use i_percent to create a true i_date */
1223             msg_Warn( p_demux, "seeking without index at %d%%"
1224                       " only works for interleaved files", i_percent );
1225             if( i_percent >= 100 )
1226             {
1227                 msg_Warn( p_demux, "cannot seek so far !" );
1228                 return VLC_EGENERIC;
1229             }
1230             i_percent = __MAX( i_percent, 0 );
1231
1232             /* try to find chunk that is at i_percent or the file */
1233             i_pos = __MAX( i_percent * stream_Size( p_demux->s ) / 100,
1234                            p_sys->i_movi_begin );
1235             /* search first selected stream */
1236             for( i_stream = 0, p_stream = NULL;
1237                         i_stream < p_sys->i_track; i_stream++ )
1238             {
1239                 p_stream = p_sys->track[i_stream];
1240                 if( p_stream->b_activated )
1241                 {
1242                     break;
1243                 }
1244             }
1245             if( !p_stream || !p_stream->b_activated )
1246             {
1247                 msg_Warn( p_demux, "cannot find any selected stream" );
1248                 return VLC_EGENERIC;
1249             }
1250
1251             /* be sure that the index exist */
1252             if( AVI_StreamChunkSet( p_demux, i_stream, 0 ) )
1253             {
1254                 msg_Warn( p_demux, "cannot seek" );
1255                 return VLC_EGENERIC;
1256             }
1257
1258             while( i_pos >= p_stream->p_index[p_stream->i_idxposc].i_pos +
1259                p_stream->p_index[p_stream->i_idxposc].i_length + 8 )
1260             {
1261                 /* search after i_idxposc */
1262                 if( AVI_StreamChunkSet( p_demux,
1263                                         i_stream, p_stream->i_idxposc + 1 ) )
1264                 {
1265                     msg_Warn( p_demux, "cannot seek" );
1266                     return VLC_EGENERIC;
1267                 }
1268             }
1269
1270             i_date = AVI_GetPTS( p_stream );
1271             /* TODO better support for i_samplesize != 0 */
1272             msg_Dbg( p_demux, "estimate date "I64Fd, i_date );
1273         }
1274
1275 #define p_stream    p_sys->track[i_stream]
1276         p_sys->i_time = 0;
1277         /* seek for chunk based streams */
1278         for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1279         {
1280             if( p_stream->b_activated && !p_stream->i_samplesize )
1281 /*            if( p_stream->b_activated ) */
1282             {
1283                 AVI_TrackSeek( p_demux, i_stream, i_date );
1284                 p_sys->i_time = __MAX( AVI_GetPTS( p_stream ),
1285                                         p_sys->i_time );
1286             }
1287         }
1288 #if 1
1289         if( p_sys->i_time )
1290         {
1291             i_date = p_sys->i_time;
1292         }
1293         /* seek for bytes based streams */
1294         for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1295         {
1296             if( p_stream->b_activated && p_stream->i_samplesize )
1297             {
1298                 AVI_TrackSeek( p_demux, i_stream, i_date );
1299 /*                p_sys->i_time = __MAX( AVI_GetPTS( p_stream ), p_sys->i_time );*/
1300             }
1301         }
1302         msg_Dbg( p_demux, "seek: "I64Fd" seconds", p_sys->i_time /1000000 );
1303         /* set true movie time */
1304 #endif
1305         if( !p_sys->i_time )
1306         {
1307             p_sys->i_time = i_date;
1308         }
1309 #undef p_stream
1310         return VLC_SUCCESS;
1311     }
1312     else
1313     {
1314         msg_Err( p_demux, "shouldn't yet be executed" );
1315         return VLC_EGENERIC;
1316     }
1317 }
1318
1319 /*****************************************************************************
1320  * Control:
1321  *****************************************************************************/
1322 static double ControlGetPosition( demux_t *p_demux )
1323 {
1324     demux_sys_t *p_sys = p_demux->p_sys;
1325
1326     if( p_sys->i_length > 0 )
1327     {
1328         return (double)p_sys->i_time / (double)( p_sys->i_length * (mtime_t)1000000 );
1329     }
1330     else if( stream_Size( p_demux->s ) > 0 )
1331     {
1332         unsigned int i;
1333         int64_t i_tmp;
1334         int64_t i64 = 0;
1335
1336         /* search the more advanced selected es */
1337         for( i = 0; i < p_sys->i_track; i++ )
1338         {
1339             avi_track_t *tk = p_sys->track[i];
1340             if( tk->b_activated && tk->i_idxposc < tk->i_idxnb )
1341             {
1342                 i_tmp = tk->p_index[tk->i_idxposc].i_pos +
1343                         tk->p_index[tk->i_idxposc].i_length + 8;
1344                 if( i_tmp > i64 )
1345                 {
1346                     i64 = i_tmp;
1347                 }
1348             }
1349         }
1350         return (double)i64 / stream_Size( p_demux->s );
1351     }
1352     return 0.0;
1353 }
1354
1355 static int Control( demux_t *p_demux, int i_query, va_list args )
1356 {
1357     demux_sys_t *p_sys = p_demux->p_sys;
1358     int i;
1359     double   f, *pf;
1360     int64_t i64, *pi64;
1361     vlc_meta_t *p_meta;
1362
1363     switch( i_query )
1364     {
1365         case DEMUX_GET_POSITION:
1366             pf = (double*)va_arg( args, double * );
1367             *pf = ControlGetPosition( p_demux );
1368             return VLC_SUCCESS;
1369         case DEMUX_SET_POSITION:
1370             f = (double)va_arg( args, double );
1371             if( p_sys->b_seekable )
1372             {
1373                 i64 = (mtime_t)(1000000.0 * p_sys->i_length * f );
1374                 return Seek( p_demux, i64, (int)(f * 100) );
1375             }
1376             else
1377             {
1378                 int64_t i_pos = stream_Size( p_demux->s ) * f;
1379                 return stream_Seek( p_demux->s, i_pos );
1380             }
1381
1382         case DEMUX_GET_TIME:
1383             pi64 = (int64_t*)va_arg( args, int64_t * );
1384             *pi64 = p_sys->i_time;
1385             return VLC_SUCCESS;
1386
1387         case DEMUX_SET_TIME:
1388         {
1389             int i_percent = 0;
1390
1391             i64 = (int64_t)va_arg( args, int64_t );
1392             if( p_sys->i_length > 0 )
1393             {
1394                 i_percent = 100 * i64 / (p_sys->i_length*1000000);
1395             }
1396             else if( p_sys->i_time > 0 )
1397             {
1398                 i_percent = (int)( 100.0 * ControlGetPosition( p_demux ) *
1399                                    (double)i64 / (double)p_sys->i_time );
1400             }
1401             return Seek( p_demux, i64, i_percent );
1402         }
1403         case DEMUX_GET_LENGTH:
1404             pi64 = (int64_t*)va_arg( args, int64_t * );
1405             *pi64 = p_sys->i_length * (mtime_t)1000000;
1406             return VLC_SUCCESS;
1407
1408         case DEMUX_GET_FPS:
1409             pf = (double*)va_arg( args, double * );
1410             *pf = 0.0;
1411             for( i = 0; i < (int)p_sys->i_track; i++ )
1412             {
1413                 avi_track_t *tk = p_sys->track[i];
1414                 if( tk->i_cat == VIDEO_ES && tk->i_scale > 0)
1415                 {
1416                     *pf = (float)tk->i_rate / (float)tk->i_scale;
1417                     break;
1418                 }
1419             }
1420             return VLC_SUCCESS;
1421         case DEMUX_GET_META:
1422             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
1423             vlc_meta_Merge( p_meta,  p_sys->meta );
1424             return VLC_SUCCESS;
1425
1426         default:
1427             return VLC_EGENERIC;
1428     }
1429 }
1430
1431 /*****************************************************************************
1432  * Function to convert pts to chunk or byte
1433  *****************************************************************************/
1434
1435 static mtime_t AVI_PTSToChunk( avi_track_t *tk, mtime_t i_pts )
1436 {
1437     if( !tk->i_scale )
1438         return (mtime_t)0;
1439
1440     return (mtime_t)((int64_t)i_pts *
1441                      (int64_t)tk->i_rate /
1442                      (int64_t)tk->i_scale /
1443                      (int64_t)1000000 );
1444 }
1445 static mtime_t AVI_PTSToByte( avi_track_t *tk, mtime_t i_pts )
1446 {
1447     if( !tk->i_scale || !tk->i_samplesize )
1448         return (mtime_t)0;
1449
1450     return (mtime_t)((int64_t)i_pts *
1451                      (int64_t)tk->i_rate /
1452                      (int64_t)tk->i_scale /
1453                      (int64_t)1000000 *
1454                      (int64_t)tk->i_samplesize );
1455 }
1456
1457 static mtime_t AVI_GetDPTS( avi_track_t *tk, int64_t i_count )
1458 {
1459     mtime_t i_dpts = 0;
1460
1461     if( !tk->i_rate )
1462         return i_dpts;
1463
1464     i_dpts = (mtime_t)( (int64_t)1000000 *
1465                         (int64_t)i_count *
1466                         (int64_t)tk->i_scale /
1467                         (int64_t)tk->i_rate );
1468
1469     if( tk->i_samplesize )
1470     {
1471         return i_dpts / tk->i_samplesize;
1472     }
1473     return i_dpts;
1474 }
1475
1476 static mtime_t AVI_GetPTS( avi_track_t *tk )
1477 {
1478     if( tk->i_samplesize )
1479     {
1480         int64_t i_count = 0;
1481
1482         /* we need a valid entry we will emulate one */
1483         if( tk->i_idxposc == tk->i_idxnb )
1484         {
1485             if( tk->i_idxposc )
1486             {
1487                 /* use the last entry */
1488                 i_count = tk->p_index[tk->i_idxnb - 1].i_lengthtotal
1489                             + tk->p_index[tk->i_idxnb - 1].i_length;
1490             }
1491         }
1492         else
1493         {
1494             i_count = tk->p_index[tk->i_idxposc].i_lengthtotal;
1495         }
1496         return AVI_GetDPTS( tk, i_count + tk->i_idxposb );
1497     }
1498     else
1499     {
1500         if( tk->i_cat == AUDIO_ES )
1501         {
1502             return AVI_GetDPTS( tk, tk->i_blockno );
1503         }
1504         else
1505         {
1506             return AVI_GetDPTS( tk, tk->i_idxposc );
1507         }
1508     }
1509 }
1510
1511 static int AVI_StreamChunkFind( demux_t *p_demux, unsigned int i_stream )
1512 {
1513     demux_sys_t *p_sys = p_demux->p_sys;
1514     avi_packet_t avi_pk;
1515     int i_loop_count = 0;
1516
1517     /* find first chunk of i_stream that isn't in index */
1518
1519     if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
1520     {
1521         stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
1522         if( AVI_PacketNext( p_demux ) )
1523         {
1524             return VLC_EGENERIC;
1525         }
1526     }
1527     else
1528     {
1529         stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
1530     }
1531
1532     for( ;; )
1533     {
1534         if( p_demux->b_die ) return VLC_EGENERIC;
1535
1536         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1537         {
1538             msg_Warn( p_demux, "cannot get packet header" );
1539             return VLC_EGENERIC;
1540         }
1541         if( avi_pk.i_stream >= p_sys->i_track ||
1542             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1543         {
1544             if( AVI_PacketNext( p_demux ) )
1545             {
1546                 return VLC_EGENERIC;
1547             }
1548
1549             /* Prevents from eating all the CPU with broken files.
1550              * This value should be low enough so that it doesn't
1551              * affect the reading speed too much. */
1552             if( !(++i_loop_count % 1024) )
1553             {
1554                 if( p_demux->b_die ) return VLC_EGENERIC;
1555                 msleep( 10000 );
1556
1557                 if( !(i_loop_count % (1024 * 10)) )
1558                     msg_Warn( p_demux, "don't seem to find any data..." );
1559             }
1560         }
1561         else
1562         {
1563             /* add this chunk to the index */
1564             avi_entry_t index;
1565
1566             index.i_id = avi_pk.i_fourcc;
1567             index.i_flags =
1568                AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
1569                               avi_pk.i_peek);
1570             index.i_pos = avi_pk.i_pos;
1571             index.i_length = avi_pk.i_size;
1572             AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
1573
1574             if( avi_pk.i_stream == i_stream  )
1575             {
1576                 return VLC_SUCCESS;
1577             }
1578
1579             if( AVI_PacketNext( p_demux ) )
1580             {
1581                 return VLC_EGENERIC;
1582             }
1583         }
1584     }
1585 }
1586
1587 /* be sure that i_ck will be a valid index entry */
1588 static int AVI_StreamChunkSet( demux_t *p_demux, unsigned int i_stream,
1589                                unsigned int i_ck )
1590 {
1591     demux_sys_t *p_sys = p_demux->p_sys;
1592     avi_track_t *p_stream = p_sys->track[i_stream];
1593
1594     p_stream->i_idxposc = i_ck;
1595     p_stream->i_idxposb = 0;
1596
1597     if(  i_ck >= p_stream->i_idxnb )
1598     {
1599         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1600         do
1601         {
1602             p_stream->i_idxposc++;
1603             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1604             {
1605                 return VLC_EGENERIC;
1606             }
1607
1608         } while( p_stream->i_idxposc < i_ck );
1609     }
1610
1611     return VLC_SUCCESS;
1612 }
1613
1614 /* XXX FIXME up to now, we assume that all chunk are one after one */
1615 static int AVI_StreamBytesSet( demux_t    *p_demux,
1616                                unsigned int i_stream,
1617                                off_t   i_byte )
1618 {
1619     demux_sys_t *p_sys = p_demux->p_sys;
1620     avi_track_t *p_stream = p_sys->track[i_stream];
1621
1622     if( ( p_stream->i_idxnb > 0 )
1623         &&( i_byte < p_stream->p_index[p_stream->i_idxnb - 1].i_lengthtotal +
1624                 p_stream->p_index[p_stream->i_idxnb - 1].i_length ) )
1625     {
1626         /* index is valid to find the ck */
1627         /* uses dichototmie to be fast enougth */
1628         int i_idxposc = __MIN( p_stream->i_idxposc, p_stream->i_idxnb - 1 );
1629         int i_idxmax  = p_stream->i_idxnb;
1630         int i_idxmin  = 0;
1631         for( ;; )
1632         {
1633             if( p_stream->p_index[i_idxposc].i_lengthtotal > i_byte )
1634             {
1635                 i_idxmax  = i_idxposc ;
1636                 i_idxposc = ( i_idxmin + i_idxposc ) / 2 ;
1637             }
1638             else
1639             {
1640                 if( p_stream->p_index[i_idxposc].i_lengthtotal +
1641                         p_stream->p_index[i_idxposc].i_length <= i_byte)
1642                 {
1643                     i_idxmin  = i_idxposc ;
1644                     i_idxposc = (i_idxmax + i_idxposc ) / 2 ;
1645                 }
1646                 else
1647                 {
1648                     p_stream->i_idxposc = i_idxposc;
1649                     p_stream->i_idxposb = i_byte -
1650                             p_stream->p_index[i_idxposc].i_lengthtotal;
1651                     return VLC_SUCCESS;
1652                 }
1653             }
1654         }
1655
1656     }
1657     else
1658     {
1659         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1660         p_stream->i_idxposb = 0;
1661         do
1662         {
1663             p_stream->i_idxposc++;
1664             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1665             {
1666                 return VLC_EGENERIC;
1667             }
1668
1669         } while( p_stream->p_index[p_stream->i_idxposc].i_lengthtotal +
1670                     p_stream->p_index[p_stream->i_idxposc].i_length <= i_byte );
1671
1672         p_stream->i_idxposb = i_byte -
1673                        p_stream->p_index[p_stream->i_idxposc].i_lengthtotal;
1674         return VLC_SUCCESS;
1675     }
1676 }
1677
1678 static int AVI_TrackSeek( demux_t *p_demux,
1679                            int i_stream,
1680                            mtime_t i_date )
1681 {
1682     demux_sys_t  *p_sys = p_demux->p_sys;
1683     avi_track_t  *tk = p_sys->track[i_stream];
1684
1685 #define p_stream    p_sys->track[i_stream]
1686     mtime_t i_oldpts;
1687
1688     i_oldpts = AVI_GetPTS( p_stream );
1689
1690     if( !p_stream->i_samplesize )
1691     {
1692         if( AVI_StreamChunkSet( p_demux,
1693                                 i_stream,
1694                                 AVI_PTSToChunk( p_stream, i_date ) ) )
1695         {
1696             return VLC_EGENERIC;
1697         }
1698
1699         if( p_stream->i_cat == AUDIO_ES )
1700         {
1701             unsigned int i;
1702             tk->i_blockno = 0;
1703             for( i = 0; i < tk->i_idxposc; i++ )
1704             {
1705                 if( tk->i_blocksize > 0 )
1706                 {
1707                     tk->i_blockno += ( tk->p_index[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize;
1708                 }
1709                 else
1710                 {
1711                     tk->i_blockno++;
1712                 }
1713             }
1714         }
1715
1716         msg_Dbg( p_demux,
1717                  "old:"I64Fd" %s new "I64Fd,
1718                  i_oldpts,
1719                  i_oldpts > i_date ? ">" : "<",
1720                  i_date );
1721
1722         if( p_stream->i_cat == VIDEO_ES )
1723         {
1724             /* search key frame */
1725             if( i_date < i_oldpts )
1726             {
1727                 while( p_stream->i_idxposc > 0 &&
1728                    !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1729                                                                 AVIIF_KEYFRAME ) )
1730                 {
1731                     if( AVI_StreamChunkSet( p_demux,
1732                                             i_stream,
1733                                             p_stream->i_idxposc - 1 ) )
1734                     {
1735                         return VLC_EGENERIC;
1736                     }
1737                 }
1738             }
1739             else
1740             {
1741                 while( p_stream->i_idxposc < p_stream->i_idxnb &&
1742                         !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1743                                                                 AVIIF_KEYFRAME ) )
1744                 {
1745                     if( AVI_StreamChunkSet( p_demux,
1746                                             i_stream,
1747                                             p_stream->i_idxposc + 1 ) )
1748                     {
1749                         return VLC_EGENERIC;
1750                     }
1751                 }
1752             }
1753         }
1754     }
1755     else
1756     {
1757         if( AVI_StreamBytesSet( p_demux,
1758                                 i_stream,
1759                                 AVI_PTSToByte( p_stream, i_date ) ) )
1760         {
1761             return VLC_EGENERIC;
1762         }
1763     }
1764     return VLC_SUCCESS;
1765 #undef p_stream
1766 }
1767
1768 /****************************************************************************
1769  * Return VLC_TRUE if it's a key frame
1770  ****************************************************************************/
1771 static int AVI_GetKeyFlag( vlc_fourcc_t i_fourcc, uint8_t *p_byte )
1772 {
1773     switch( i_fourcc )
1774     {
1775         case FOURCC_DIV1:
1776             /* we have:
1777              *  startcode:      0x00000100   32bits
1778              *  framenumber     ?             5bits
1779              *  piture type     0(I),1(P)     2bits
1780              */
1781             if( GetDWBE( p_byte ) != 0x00000100 )
1782             {
1783                 /* it's not an msmpegv1 stream, strange...*/
1784                 return AVIIF_KEYFRAME;
1785             }
1786             return p_byte[4] & 0x06 ? 0 : AVIIF_KEYFRAME;
1787
1788         case FOURCC_DIV2:
1789         case FOURCC_DIV3:   /* wmv1 also */
1790             /* we have
1791              *  picture type    0(I),1(P)     2bits
1792              */
1793             return p_byte[0] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1794         case FOURCC_mp4v:
1795             /* we should find first occurrence of 0x000001b6 (32bits)
1796              *  startcode:      0x000001b6   32bits
1797              *  piture type     0(I),1(P)     2bits
1798              */
1799             if( GetDWBE( p_byte ) != 0x000001b6 )
1800             {
1801                 /* not true , need to find the first VOP header */
1802                 return AVIIF_KEYFRAME;
1803             }
1804             return p_byte[4] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1805
1806         default:
1807             /* I can't do it, so say yes */
1808             return AVIIF_KEYFRAME;
1809     }
1810 }
1811
1812 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t i_codec )
1813 {
1814     switch( i_cat )
1815     {
1816         case AUDIO_ES:
1817             wf_tag_to_fourcc( i_codec, &i_codec, NULL );
1818             return i_codec;
1819
1820         case VIDEO_ES:
1821             /* XXX DIV1 <- msmpeg4v1, DIV2 <- msmpeg4v2, DIV3 <- msmpeg4v3, mp4v for mpeg4 */
1822             switch( i_codec )
1823             {
1824                 case FOURCC_1:
1825                     return VLC_FOURCC('m','r','l','e');
1826                 case FOURCC_DIV1:
1827                 case FOURCC_div1:
1828                 case FOURCC_MPG4:
1829                 case FOURCC_mpg4:
1830                     return FOURCC_DIV1;
1831                 case FOURCC_DIV2:
1832                 case FOURCC_div2:
1833                 case FOURCC_MP42:
1834                 case FOURCC_mp42:
1835                 case FOURCC_MPG3:
1836                 case FOURCC_mpg3:
1837                     return FOURCC_DIV2;
1838                 case FOURCC_div3:
1839                 case FOURCC_MP43:
1840                 case FOURCC_mp43:
1841                 case FOURCC_DIV3:
1842                 case FOURCC_DIV4:
1843                 case FOURCC_div4:
1844                 case FOURCC_DIV5:
1845                 case FOURCC_div5:
1846                 case FOURCC_DIV6:
1847                 case FOURCC_div6:
1848                 case FOURCC_AP41:
1849                 case FOURCC_3IV1:
1850                 case FOURCC_3iv1:
1851                 case FOURCC_3IVD:
1852                 case FOURCC_3ivd:
1853                 case FOURCC_3VID:
1854                 case FOURCC_3vid:
1855                     return FOURCC_DIV3;
1856                 case FOURCC_DIVX:
1857                 case FOURCC_divx:
1858                 case FOURCC_MP4S:
1859                 case FOURCC_mp4s:
1860                 case FOURCC_M4S2:
1861                 case FOURCC_m4s2:
1862                 case FOURCC_xvid:
1863                 case FOURCC_XVID:
1864                 case FOURCC_XviD:
1865                 case FOURCC_DX50:
1866                 case FOURCC_dx50:
1867                 case FOURCC_mp4v:
1868                 case FOURCC_4:
1869                 case FOURCC_3IV2:
1870                 case FOURCC_3iv2:
1871                     return FOURCC_mp4v;
1872             }
1873         default:
1874             return VLC_FOURCC( 'u', 'n', 'd', 'f' );
1875     }
1876 }
1877
1878 /****************************************************************************
1879  *
1880  ****************************************************************************/
1881 static void AVI_ParseStreamHeader( vlc_fourcc_t i_id,
1882                                    unsigned int *pi_number, unsigned int *pi_type )
1883 {
1884 #define SET_PTR( p, v ) if( p ) *(p) = (v);
1885     int c1, c2;
1886
1887     c1 = ((uint8_t *)&i_id)[0];
1888     c2 = ((uint8_t *)&i_id)[1];
1889
1890     if( c1 < '0' || c1 > '9' || c2 < '0' || c2 > '9' )
1891     {
1892         SET_PTR( pi_number, 100 ); /* > max stream number */
1893         SET_PTR( pi_type, UNKNOWN_ES );
1894     }
1895     else
1896     {
1897         SET_PTR( pi_number, (c1 - '0') * 10 + (c2 - '0' ) );
1898         switch( VLC_TWOCC( ((uint8_t *)&i_id)[2], ((uint8_t *)&i_id)[3] ) )
1899         {
1900             case AVITWOCC_wb:
1901                 SET_PTR( pi_type, AUDIO_ES );
1902                 break;
1903             case AVITWOCC_dc:
1904             case AVITWOCC_db:
1905                 SET_PTR( pi_type, VIDEO_ES );
1906                 break;
1907             default:
1908                 SET_PTR( pi_type, UNKNOWN_ES );
1909                 break;
1910         }
1911     }
1912 #undef SET_PTR
1913 }
1914
1915 /****************************************************************************
1916  *
1917  ****************************************************************************/
1918 static int AVI_PacketGetHeader( demux_t *p_demux, avi_packet_t *p_pk )
1919 {
1920     uint8_t  *p_peek;
1921
1922     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 )
1923     {
1924         return VLC_EGENERIC;
1925     }
1926     p_pk->i_fourcc  = VLC_FOURCC( p_peek[0], p_peek[1], p_peek[2], p_peek[3] );
1927     p_pk->i_size    = GetDWLE( p_peek + 4 );
1928     p_pk->i_pos     = stream_Tell( p_demux->s );
1929     if( p_pk->i_fourcc == AVIFOURCC_LIST || p_pk->i_fourcc == AVIFOURCC_RIFF )
1930     {
1931         p_pk->i_type = VLC_FOURCC( p_peek[8],  p_peek[9],
1932                                    p_peek[10], p_peek[11] );
1933     }
1934     else
1935     {
1936         p_pk->i_type = 0;
1937     }
1938
1939     memcpy( p_pk->i_peek, p_peek + 8, 8 );
1940
1941     AVI_ParseStreamHeader( p_pk->i_fourcc, &p_pk->i_stream, &p_pk->i_cat );
1942     return VLC_SUCCESS;
1943 }
1944
1945 static int AVI_PacketNext( demux_t *p_demux )
1946 {
1947     avi_packet_t    avi_ck;
1948     int             i_skip = 0;
1949
1950     if( AVI_PacketGetHeader( p_demux, &avi_ck ) )
1951     {
1952         return VLC_EGENERIC;
1953     }
1954
1955     if( avi_ck.i_fourcc == AVIFOURCC_LIST &&
1956         ( avi_ck.i_type == AVIFOURCC_rec || avi_ck.i_type == AVIFOURCC_movi ) )
1957     {
1958         i_skip = 12;
1959     }
1960     else if( avi_ck.i_fourcc == AVIFOURCC_RIFF &&
1961              avi_ck.i_type == AVIFOURCC_AVIX )
1962     {
1963         i_skip = 24;
1964     }
1965     else
1966     {
1967         i_skip = __EVEN( avi_ck.i_size ) + 8;
1968     }
1969
1970     if( stream_Read( p_demux->s, NULL, i_skip ) != i_skip )
1971     {
1972         return VLC_EGENERIC;
1973     }
1974     return VLC_SUCCESS;
1975 }
1976
1977 static int AVI_PacketRead( demux_t   *p_demux,
1978                            avi_packet_t     *p_pk,
1979                            block_t          **pp_frame )
1980 {
1981     size_t i_size;
1982
1983     i_size = __EVEN( p_pk->i_size + 8 );
1984
1985     if( ( *pp_frame = stream_Block( p_demux->s, i_size ) ) == NULL )
1986     {
1987         return VLC_EGENERIC;
1988     }
1989     (*pp_frame)->p_buffer += 8;
1990     (*pp_frame)->i_buffer -= 8;
1991
1992     if( i_size != p_pk->i_size + 8 )
1993     {
1994         (*pp_frame)->i_buffer--;
1995     }
1996
1997     return VLC_SUCCESS;
1998 }
1999
2000 static int AVI_PacketSearch( demux_t *p_demux )
2001 {
2002     demux_sys_t     *p_sys = p_demux->p_sys;
2003     avi_packet_t    avi_pk;
2004     int             i_count = 0;
2005
2006     for( ;; )
2007     {
2008         if( stream_Read( p_demux->s, NULL, 1 ) != 1 )
2009         {
2010             return VLC_EGENERIC;
2011         }
2012         AVI_PacketGetHeader( p_demux, &avi_pk );
2013         if( avi_pk.i_stream < p_sys->i_track &&
2014             ( avi_pk.i_cat == AUDIO_ES || avi_pk.i_cat == VIDEO_ES ) )
2015         {
2016             return VLC_SUCCESS;
2017         }
2018         switch( avi_pk.i_fourcc )
2019         {
2020             case AVIFOURCC_JUNK:
2021             case AVIFOURCC_LIST:
2022             case AVIFOURCC_RIFF:
2023             case AVIFOURCC_idx1:
2024                 return VLC_SUCCESS;
2025         }
2026
2027         /* Prevents from eating all the CPU with broken files.
2028          * This value should be low enough so that it doesn't affect the
2029          * reading speed too much (not that we care much anyway because
2030          * this code is called only on broken files). */
2031         if( !(++i_count % 1024) )
2032         {
2033             if( p_demux->b_die ) return VLC_EGENERIC;
2034
2035             msleep( 10000 );
2036             if( !(i_count % (1024 * 10)) )
2037                 msg_Warn( p_demux, "trying to resync..." );
2038         }
2039     }
2040 }
2041
2042 /****************************************************************************
2043  * Index stuff.
2044  ****************************************************************************/
2045 static void AVI_IndexAddEntry( demux_sys_t *p_sys,
2046                                int i_stream,
2047                                avi_entry_t *p_index)
2048 {
2049     avi_track_t *tk = p_sys->track[i_stream];
2050
2051     /* Update i_movi_lastchunk_pos */
2052     if( p_sys->i_movi_lastchunk_pos < p_index->i_pos )
2053     {
2054         p_sys->i_movi_lastchunk_pos = p_index->i_pos;
2055     }
2056
2057     /* add the entry */
2058     if( tk->i_idxnb >= tk->i_idxmax )
2059     {
2060         tk->i_idxmax += 16384;
2061         tk->p_index = realloc( tk->p_index,
2062                                tk->i_idxmax * sizeof( avi_entry_t ) );
2063         if( tk->p_index == NULL )
2064         {
2065             return;
2066         }
2067     }
2068     /* calculate cumulate length */
2069     if( tk->i_idxnb > 0 )
2070     {
2071         p_index->i_lengthtotal =
2072             tk->p_index[tk->i_idxnb - 1].i_length +
2073                 tk->p_index[tk->i_idxnb - 1].i_lengthtotal;
2074     }
2075     else
2076     {
2077         p_index->i_lengthtotal = 0;
2078     }
2079
2080     tk->p_index[tk->i_idxnb++] = *p_index;
2081 }
2082
2083 static int AVI_IndexLoad_idx1( demux_t *p_demux )
2084 {
2085     demux_sys_t *p_sys = p_demux->p_sys;
2086
2087     avi_chunk_list_t    *p_riff;
2088     avi_chunk_list_t    *p_movi;
2089     avi_chunk_idx1_t    *p_idx1;
2090
2091     unsigned int i_stream;
2092     unsigned int i_index;
2093     off_t        i_offset;
2094     unsigned int i;
2095
2096     vlc_bool_t b_keyset[100];
2097
2098     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2099     p_idx1 = AVI_ChunkFind( p_riff, AVIFOURCC_idx1, 0);
2100     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2101
2102     if( !p_idx1 )
2103     {
2104         msg_Warn( p_demux, "cannot find idx1 chunk, no index defined" );
2105         return VLC_EGENERIC;
2106     }
2107
2108     /* *** calculate offset *** */
2109     /* Well, avi is __SHIT__ so test more than one entry
2110      * (needed for some avi files) */
2111     i_offset = 0;
2112     for( i = 0; i < __MIN( p_idx1->i_entry_count, 10 ); i++ )
2113     {
2114         if( p_idx1->entry[i].i_pos < p_movi->i_chunk_pos )
2115         {
2116             i_offset = p_movi->i_chunk_pos + 8;
2117             break;
2118         }
2119     }
2120
2121     /* Reset b_keyset */
2122     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2123         b_keyset[i_stream] = VLC_FALSE;
2124
2125     for( i_index = 0; i_index < p_idx1->i_entry_count; i_index++ )
2126     {
2127         unsigned int i_cat;
2128
2129         AVI_ParseStreamHeader( p_idx1->entry[i_index].i_fourcc,
2130                                &i_stream,
2131                                &i_cat );
2132         if( i_stream < p_sys->i_track &&
2133             i_cat == p_sys->track[i_stream]->i_cat )
2134         {
2135             avi_entry_t index;
2136             index.i_id      = p_idx1->entry[i_index].i_fourcc;
2137             index.i_flags   =
2138                 p_idx1->entry[i_index].i_flags&(~AVIIF_FIXKEYFRAME);
2139             index.i_pos     = p_idx1->entry[i_index].i_pos + i_offset;
2140             index.i_length  = p_idx1->entry[i_index].i_length;
2141             AVI_IndexAddEntry( p_sys, i_stream, &index );
2142
2143             if( index.i_flags&AVIIF_KEYFRAME )
2144                 b_keyset[i_stream] = VLC_TRUE;
2145         }
2146     }
2147
2148     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2149     {
2150         if( !b_keyset[i_stream] )
2151         {
2152             avi_track_t *tk = p_sys->track[i_stream];
2153
2154             msg_Dbg( p_demux, "no key frame set for track %d", i_stream );
2155             for( i_index = 0; i_index < tk->i_idxnb; i_index++ )
2156                 tk->p_index[i_index].i_flags |= AVIIF_KEYFRAME;
2157         }
2158     }
2159     return VLC_SUCCESS;
2160 }
2161
2162 static void __Parse_indx( demux_t    *p_demux,
2163                           int               i_stream,
2164                           avi_chunk_indx_t  *p_indx )
2165 {
2166     demux_sys_t         *p_sys    = p_demux->p_sys;
2167     avi_entry_t     index;
2168     int32_t             i;
2169
2170     msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_entriesinuse );
2171     if( p_indx->i_indexsubtype == 0 )
2172     {
2173         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2174         {
2175             index.i_id      = p_indx->i_id;
2176             index.i_flags   = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2177             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.std[i].i_offset - 8;
2178             index.i_length  = p_indx->idx.std[i].i_size&0x7fffffff;
2179
2180             AVI_IndexAddEntry( p_sys, i_stream, &index );
2181         }
2182     }
2183     else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
2184     {
2185         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2186         {
2187             index.i_id      = p_indx->i_id;
2188             index.i_flags   = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2189             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.field[i].i_offset - 8;
2190             index.i_length  = p_indx->idx.field[i].i_size;
2191
2192             AVI_IndexAddEntry( p_sys, i_stream, &index );
2193         }
2194     }
2195     else
2196     {
2197         msg_Warn( p_demux, "unknown subtype index(0x%x)", p_indx->i_indexsubtype );
2198     }
2199 }
2200
2201 static void AVI_IndexLoad_indx( demux_t *p_demux )
2202 {
2203     demux_sys_t         *p_sys = p_demux->p_sys;
2204     unsigned int        i_stream;
2205     int32_t             i;
2206
2207     avi_chunk_list_t    *p_riff;
2208     avi_chunk_list_t    *p_hdrl;
2209
2210     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2211     p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
2212
2213     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2214     {
2215         avi_chunk_list_t    *p_strl;
2216         avi_chunk_indx_t    *p_indx;
2217
2218 #define p_stream  p_sys->track[i_stream]
2219         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i_stream );
2220         p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0 );
2221
2222         if( !p_indx )
2223         {
2224             msg_Warn( p_demux, "cannot find indx (misdetect/broken OpenDML "
2225                                "file?)" );
2226             continue;
2227         }
2228
2229         if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS )
2230         {
2231             __Parse_indx( p_demux, i_stream, p_indx );
2232         }
2233         else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
2234         {
2235             avi_chunk_t    ck_sub;
2236             for( i = 0; i < p_indx->i_entriesinuse; i++ )
2237             {
2238                 if( stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset )||
2239                     AVI_ChunkRead( p_demux->s, &ck_sub, NULL  ) )
2240                 {
2241                     break;
2242                 }
2243                 __Parse_indx( p_demux, i_stream, &ck_sub.indx );
2244             }
2245         }
2246         else
2247         {
2248             msg_Warn( p_demux, "unknown type index(0x%x)", p_indx->i_indextype );
2249         }
2250 #undef p_stream
2251     }
2252 }
2253
2254 static void AVI_IndexLoad( demux_t *p_demux )
2255 {
2256     demux_sys_t *p_sys = p_demux->p_sys;
2257     unsigned int i_stream;
2258
2259     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2260     {
2261         p_sys->track[i_stream]->i_idxnb  = 0;
2262         p_sys->track[i_stream]->i_idxmax = 0;
2263         p_sys->track[i_stream]->p_index  = NULL;
2264     }
2265
2266     if( p_sys->b_odml )
2267     {
2268         AVI_IndexLoad_indx( p_demux );
2269     }
2270     else  if( AVI_IndexLoad_idx1( p_demux ) )
2271     {
2272         /* try indx if idx1 failed as some "normal" file have indx too */
2273         AVI_IndexLoad_indx( p_demux );
2274     }
2275
2276     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2277     {
2278         msg_Dbg( p_demux, "stream[%d] created %d index entries",
2279                 i_stream, p_sys->track[i_stream]->i_idxnb );
2280     }
2281 }
2282
2283 static void AVI_IndexCreate( demux_t *p_demux )
2284 {
2285     demux_sys_t *p_sys = p_demux->p_sys;
2286
2287     avi_chunk_list_t    *p_riff;
2288     avi_chunk_list_t    *p_movi;
2289
2290     unsigned int i_stream;
2291     off_t i_movi_end;
2292
2293     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2294     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2295
2296     if( !p_movi )
2297     {
2298         msg_Err( p_demux, "cannot find p_movi" );
2299         return;
2300     }
2301
2302     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2303     {
2304         p_sys->track[i_stream]->i_idxnb  = 0;
2305         p_sys->track[i_stream]->i_idxmax = 0;
2306         p_sys->track[i_stream]->p_index  = NULL;
2307     }
2308     i_movi_end = __MIN( (off_t)(p_movi->i_chunk_pos + p_movi->i_chunk_size),
2309                         stream_Size( p_demux->s ) );
2310
2311     stream_Seek( p_demux->s, p_movi->i_chunk_pos + 12 );
2312     msg_Warn( p_demux, "creating index from LIST-movi, will take time !" );
2313
2314
2315     /* Only show dialog if AVI is > 10MB */
2316     p_demux->p_sys->i_dialog_id = -1;
2317     if( stream_Size( p_demux->s ) > 10000000 )
2318     {
2319         p_demux->p_sys->i_dialog_id = intf_IntfProgress( p_demux,
2320                                         _( "Fixing AVI Index..." ),
2321                                         0.0 );
2322         p_demux->p_sys->last_update = mdate();
2323     }
2324
2325     for( ;; )
2326     {
2327         avi_packet_t pk;
2328
2329         if( p_demux->b_die )
2330         {
2331             return;
2332         }
2333
2334         /* Don't update dialog too often */
2335         if( p_demux->p_sys->i_dialog_id > 0 &&
2336             mdate() - p_demux->p_sys->last_update > 100000 )
2337         {
2338             int64_t i_pos = stream_Tell( p_demux->s )* 100 /
2339                             stream_Size( p_demux->s );
2340             float f_pos = (float)i_pos;
2341             p_demux->p_sys->last_update = mdate();
2342             intf_ProgressUpdate( p_demux, p_demux->p_sys->i_dialog_id,
2343                                  _( "Fixing AVI Index..." ), f_pos, -1 );
2344         }
2345
2346         if( AVI_PacketGetHeader( p_demux, &pk ) )
2347         {
2348             break;
2349         }
2350         if( pk.i_stream < p_sys->i_track &&
2351             pk.i_cat == p_sys->track[pk.i_stream]->i_cat )
2352         {
2353             avi_entry_t index;
2354             index.i_id      = pk.i_fourcc;
2355             index.i_flags   =
2356                AVI_GetKeyFlag(p_sys->track[pk.i_stream]->i_codec, pk.i_peek);
2357             index.i_pos     = pk.i_pos;
2358             index.i_length  = pk.i_size;
2359             AVI_IndexAddEntry( p_sys, pk.i_stream, &index );
2360         }
2361         else
2362         {
2363             switch( pk.i_fourcc )
2364             {
2365                 case AVIFOURCC_idx1:
2366                     if( p_sys->b_odml )
2367                     {
2368                         avi_chunk_list_t *p_sysx;
2369                         p_sysx = AVI_ChunkFind( &p_sys->ck_root,
2370                                                 AVIFOURCC_RIFF, 1 );
2371
2372                         msg_Dbg( p_demux, "looking for new RIFF chunk" );
2373                         if( stream_Seek( p_demux->s, p_sysx->i_chunk_pos + 24))
2374                         {
2375                             goto print_stat;
2376                         }
2377                         break;
2378                     }
2379                     goto print_stat;
2380                 case AVIFOURCC_RIFF:
2381                         msg_Dbg( p_demux, "new RIFF chunk found" );
2382                 case AVIFOURCC_rec:
2383                 case AVIFOURCC_JUNK:
2384                     break;
2385                 default:
2386                     msg_Warn( p_demux, "need resync, probably broken avi" );
2387                     if( AVI_PacketSearch( p_demux ) )
2388                     {
2389                         msg_Warn( p_demux, "lost sync, abord index creation" );
2390                         goto print_stat;
2391                     }
2392             }
2393         }
2394
2395         if( ( !p_sys->b_odml && pk.i_pos + pk.i_size >= i_movi_end ) ||
2396             AVI_PacketNext( p_demux ) )
2397         {
2398             break;
2399         }
2400     }
2401
2402 print_stat:
2403     if( p_demux->p_sys->i_dialog_id > 0 )
2404     {
2405         intf_UserHide( p_demux, p_demux->p_sys->i_dialog_id );
2406     }
2407
2408     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2409     {
2410         msg_Dbg( p_demux,
2411                 "stream[%d] creating %d index entries",
2412                 i_stream,
2413                 p_sys->track[i_stream]->i_idxnb );
2414     }
2415 }
2416
2417 /*****************************************************************************
2418  * Stream management
2419  *****************************************************************************/
2420 static int AVI_TrackStopFinishedStreams( demux_t *p_demux )
2421 {
2422     demux_sys_t *p_sys = p_demux->p_sys;
2423     unsigned int i;
2424     int b_end = VLC_TRUE;
2425
2426     for( i = 0; i < p_sys->i_track; i++ )
2427     {
2428         avi_track_t *tk = p_sys->track[i];
2429         if( tk->i_idxposc >= tk->i_idxnb )
2430         {
2431             tk->b_activated = VLC_FALSE;
2432             if( tk->p_es ) es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE, tk->p_es, VLC_FALSE );
2433         }
2434         else
2435         {
2436             b_end = VLC_FALSE;
2437         }
2438     }
2439     return( b_end );
2440 }
2441
2442 /****************************************************************************
2443  * AVI_MovieGetLength give max streams length in second
2444  ****************************************************************************/
2445 static mtime_t  AVI_MovieGetLength( demux_t *p_demux )
2446 {
2447     demux_sys_t  *p_sys = p_demux->p_sys;
2448     mtime_t      i_maxlength = 0;
2449     unsigned int i;
2450
2451     for( i = 0; i < p_sys->i_track; i++ )
2452     {
2453         avi_track_t *tk = p_sys->track[i];
2454         mtime_t i_length;
2455
2456         /* fix length for each stream */
2457         if( tk->i_idxnb < 1 || !tk->p_index )
2458         {
2459             continue;
2460         }
2461
2462         if( tk->i_samplesize )
2463         {
2464             i_length = AVI_GetDPTS( tk,
2465                                     tk->p_index[tk->i_idxnb-1].i_lengthtotal +
2466                                         tk->p_index[tk->i_idxnb-1].i_length );
2467         }
2468         else
2469         {
2470             i_length = AVI_GetDPTS( tk, tk->i_idxnb );
2471         }
2472         i_length /= (mtime_t)1000000;    /* in seconds */
2473
2474         msg_Dbg( p_demux,
2475                  "stream[%d] length:"I64Fd" (based on index)",
2476                  i,
2477                  i_length );
2478         i_maxlength = __MAX( i_maxlength, i_length );
2479     }
2480
2481     return i_maxlength;
2482 }