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 #include <vlc/vlc.h>
  28 #include <vlc_demux.h>
  29
  30 #include <vlc_interface.h>
  31
  32 #include <vlc_meta.h>
  33 #include <vlc_codecs.h>
  34 #include <vlc_charset.h>
  35
  36 #include "libavi.h"
  37
  38 /*****************************************************************************
  39  * Module descriptor
  40  *****************************************************************************/
  41
  42 #define INTERLEAVE_TEXT N_("Force interleaved method" )
  43 #define INTERLEAVE_LONGTEXT N_( "Force interleaved method." )
  44
  45 #define INDEX_TEXT N_("Force index creation")
  46 #define INDEX_LONGTEXT N_( \
  47     "Recreate a index for the AVI file. Use this if your AVI file is damaged "\
  48     "or incomplete (not seekable)." )
  49
  50 static int  Open ( vlc_object_t * );
  51 static void Close( vlc_object_t * );
  52
  53 static int pi_index[] = {0,1,2};
  54
  55 static const char *ppsz_indexes[] = { N_("Ask"), N_("Always fix"),
  56                                 N_("Never fix") };
  57
  58 vlc_module_begin();
  59     set_shortname( "AVI" );
  60     set_description( _("AVI demuxer") );
  61     set_capability( "demux2", 212 );
  62     set_category( CAT_INPUT );
  63     set_subcategory( SUBCAT_INPUT_DEMUX );
  64
  65     add_bool( "avi-interleaved", 0, NULL,
  66               INTERLEAVE_TEXT, INTERLEAVE_LONGTEXT, VLC_TRUE );
  67     add_integer( "avi-index", 0, NULL,
  68               INDEX_TEXT, INDEX_LONGTEXT, VLC_FALSE );
  69         change_integer_list( pi_index, ppsz_indexes, 0 );
  70
  71     set_callbacks( Open, Close );
  72 vlc_module_end();
  73
  74 /*****************************************************************************
  75  * Local prototypes
  76  *****************************************************************************/
  77 static int Control         ( demux_t *, int, va_list );
  78 static int Seek            ( demux_t *, mtime_t, int );
  79 static int Demux_Seekable  ( demux_t * );
  80 static int Demux_UnSeekable( demux_t * );
  81
  82 #define __ABS( x ) ( (x) < 0 ? (-(x)) : (x) )
  83
  84 typedef struct
  85 {
  86     vlc_fourcc_t i_fourcc;
  87     off_t        i_pos;
  88     uint32_t     i_size;
  89     vlc_fourcc_t i_type;     /* only for AVIFOURCC_LIST */
  90
  91     uint8_t      i_peek[8];  /* first 8 bytes */
  92
  93     unsigned int i_stream;
  94     unsigned int i_cat;
  95 } avi_packet_t;
  96
  97
  98 typedef struct
  99 {
 100     vlc_fourcc_t i_id;
 101     uint32_t     i_flags;
 102     off_t        i_pos;
 103     uint32_t     i_length;
 104     uint32_t     i_lengthtotal;
 105
 106 } avi_entry_t;
 107
 108 typedef struct
 109 {
 110     vlc_bool_t      b_activated;
 111
 112     unsigned int    i_cat; /* AUDIO_ES, VIDEO_ES */
 113     vlc_fourcc_t    i_codec;
 114
 115     int             i_rate;
 116     int             i_scale;
 117     int             i_samplesize;
 118
 119     es_out_id_t     *p_es;
 120
 121     /* Avi Index */
 122     avi_entry_t     *p_index;
 123     unsigned int    i_idxnb;
 124     unsigned int    i_idxmax;
 125
 126     unsigned int    i_idxposc;  /* numero of chunk */
 127     unsigned int    i_idxposb;  /* byte in the current chunk */
 128
 129     /* For VBR audio only */
 130     unsigned int    i_blockno;
 131     unsigned int    i_blocksize;
 132
 133     /* For muxed streams */
 134     stream_t        *p_out_muxed;
 135 } avi_track_t;
 136
 137 struct demux_sys_t
 138 {
 139     mtime_t i_time;
 140     mtime_t i_length;
 141
 142     vlc_bool_t  b_seekable;
 143     vlc_bool_t  b_muxed;
 144     avi_chunk_t ck_root;
 145
 146     vlc_bool_t  b_odml;
 147
 148     off_t   i_movi_begin;
 149     off_t   i_movi_lastchunk_pos;   /* XXX position of last valid chunk */
 150
 151     /* number of streams and information */
 152     unsigned int i_track;
 153     avi_track_t  **track;
 154
 155     /* meta */
 156     vlc_meta_t  *meta;
 157
 158     /* Progress box */
 159     mtime_t    last_update;
 160     int        i_dialog_id;
 161 };
 162
 163 static inline off_t __EVEN( off_t i )
 164 {
 165     return (i & 1) ? i + 1 : i;
 166 }
 167
 168 static mtime_t AVI_PTSToChunk( avi_track_t *, mtime_t i_pts );
 169 static mtime_t AVI_PTSToByte ( avi_track_t *, mtime_t i_pts );
 170 static mtime_t AVI_GetDPTS   ( avi_track_t *, int64_t i_count );
 171 static mtime_t AVI_GetPTS    ( avi_track_t * );
 172
 173
 174 static int AVI_StreamChunkFind( demux_t *, unsigned int i_stream );
 175 static int AVI_StreamChunkSet ( demux_t *,
 176                                 unsigned int i_stream, unsigned int i_ck );
 177 static int AVI_StreamBytesSet ( demux_t *,
 178                                 unsigned int i_stream, off_t   i_byte );
 179
 180 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t );
 181 static int   AVI_GetKeyFlag    ( vlc_fourcc_t , uint8_t * );
 182
 183 static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk );
 184 static int AVI_PacketNext     ( demux_t * );
 185 static int AVI_PacketRead     ( demux_t *, avi_packet_t *, block_t **);
 186 static int AVI_PacketSearch   ( demux_t * );
 187
 188 static void AVI_IndexLoad    ( demux_t * );
 189 static void AVI_IndexCreate  ( demux_t * );
 190 static void AVI_IndexAddEntry( demux_sys_t *, int, avi_entry_t * );
 191
 192 static mtime_t  AVI_MovieGetLength( demux_t * );
 193
 194 /*****************************************************************************
 195  * Stream management
 196  *****************************************************************************/
 197 static int        AVI_TrackSeek  ( demux_t *, int, mtime_t );
 198 static int        AVI_TrackStopFinishedStreams( demux_t *);
 199
 200 /* Remarks:
 201  - For VBR mp3 stream:
 202     count blocks by rounded-up chunksizes instead of chunks
 203     we need full emulation of dshow avi demuxer bugs :(
 204     fixes silly nandub-style a-v delaying in avi with vbr mp3...
 205     (from mplayer 2002/08/02)
 206  - to complete....
 207  */
 208
 209 /*****************************************************************************
 210  * Open: check file and initializes AVI structures
 211  *****************************************************************************/
 212 static int Open( vlc_object_t * p_this )
 213 {
 214     demux_t  *p_demux = (demux_t *)p_this;
 215     demux_sys_t     *p_sys;
 216
 217     vlc_bool_t       b_index = VLC_FALSE;
 218     int              i_do_index;
 219
 220     avi_chunk_t         ck_riff;
 221     avi_chunk_list_t    *p_riff = (avi_chunk_list_t*)&ck_riff;
 222     avi_chunk_list_t    *p_hdrl, *p_movi;
 223     avi_chunk_avih_t    *p_avih;
 224
 225     unsigned int i_track;
 226     unsigned int i, i_peeker;
 227
 228     uint8_t  *p_peek;
 229
 230     /* Is it an avi file ? */
 231     if( stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC;
 232
 233     for( i_peeker = 0; i_peeker < 188; i_peeker++ )
 234     {
 235         if( !strncmp( (char *)&p_peek[0], "RIFF", 4 ) &&
 236             !strncmp( (char *)&p_peek[8], "AVI ", 4 ) ) break;
 237         p_peek++;
 238     }
 239     if( i_peeker == 188 )
 240     {
 241         return VLC_EGENERIC;
 242     }
 243
 244     /* Initialize input  structures. */
 245     p_sys = p_demux->p_sys = malloc( sizeof(demux_sys_t) );
 246     memset( p_sys, 0, sizeof( demux_sys_t ) );
 247     p_sys->i_time   = 0;
 248     p_sys->i_length = 0;
 249     p_sys->i_movi_lastchunk_pos = 0;
 250     p_sys->b_odml   = VLC_FALSE;
 251     p_sys->b_muxed  = VLC_FALSE;
 252     p_sys->i_track  = 0;
 253     p_sys->track    = NULL;
 254     p_sys->meta     = NULL;
 255
 256     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_seekable );
 257
 258     p_demux->pf_control = Control;
 259     p_demux->pf_demux = Demux_Seekable;
 260
 261     /* For unseekable stream, automaticaly use Demux_UnSeekable */
 262     if( !p_sys->b_seekable || config_GetInt( p_demux, "avi-interleaved" ) )
 263     {
 264         p_demux->pf_demux = Demux_UnSeekable;
 265     }
 266
 267     if( i_peeker > 0 )
 268     {
 269         stream_Read( p_demux->s, NULL, i_peeker );
 270     }
 271
 272     if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) )
 273     {
 274         msg_Err( p_demux, "avi module discarded (invalid file)" );
 275         return VLC_EGENERIC;
 276     }
 277
 278     if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF ) > 1 )
 279     {
 280         unsigned int i_count =
 281             AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF );
 282
 283         msg_Warn( p_demux, "multiple riff -> OpenDML ?" );
 284         for( i = 1; i < i_count; i++ )
 285         {
 286             avi_chunk_list_t *p_sysx;
 287
 288             p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i );
 289             if( p_sysx->i_type == AVIFOURCC_AVIX )
 290             {
 291                 msg_Warn( p_demux, "detected OpenDML file" );
 292                 p_sys->b_odml = VLC_TRUE;
 293                 break;
 294             }
 295         }
 296     }
 297
 298     p_riff  = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0 );
 299     p_hdrl  = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
 300     p_movi  = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0 );
 301
 302     if( !p_hdrl || !p_movi )
 303     {
 304         msg_Err( p_demux, "avi module discarded (invalid file)" );
 305         goto error;
 306     }
 307
 308     if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0 ) ) )
 309     {
 310         msg_Err( p_demux, "cannot find avih chunk" );
 311         goto error;
 312     }
 313     i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl );
 314     if( p_avih->i_streams != i_track )
 315     {
 316         msg_Warn( p_demux,
 317                   "found %d stream but %d are declared",
 318                   i_track, p_avih->i_streams );
 319     }
 320     if( i_track == 0 )
 321     {
 322         msg_Err( p_demux, "no stream defined!" );
 323         goto error;
 324     }
 325
 326     /* print information on streams */
 327     msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ",
 328              i_track,
 329              p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 330              p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 331              p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 332              p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 333     if( ( p_sys->meta = vlc_meta_New() ) )
 334     {
 335         char buffer[200];
 336         sprintf( buffer, "%s%s%s%s",
 337                  p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 338                  p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 339                  p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 340                  p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 341         vlc_meta_SetSetting( p_sys->meta, buffer );
 342     }
 343
 344     /* now read info on each stream and create ES */
 345     for( i = 0 ; i < i_track; i++ )
 346     {
 347         avi_track_t           *tk     = malloc( sizeof( avi_track_t ) );
 348         avi_chunk_list_t      *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 349         avi_chunk_strh_t      *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 350         avi_chunk_STRING_t    *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0 );
 351         avi_chunk_strf_auds_t *p_auds = NULL;
 352         avi_chunk_strf_vids_t *p_vids = NULL;
 353         es_format_t fmt;
 354
 355         tk->b_activated = VLC_FALSE;
 356         tk->p_index     = 0;
 357         tk->i_idxnb     = 0;
 358         tk->i_idxmax    = 0;
 359         tk->i_idxposc   = 0;
 360         tk->i_idxposb   = 0;
 361
 362         tk->i_blockno   = 0;
 363         tk->i_blocksize = 0;
 364
 365         tk->p_es        = NULL;
 366         tk->p_out_muxed = NULL;
 367
 368         p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 369         p_auds = (avi_chunk_strf_auds_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 370
 371         if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
 372         {
 373             msg_Warn( p_demux, "stream[%d] incomplete", i );
 374             continue;
 375         }
 376
 377         tk->i_rate  = p_strh->i_rate;
 378         tk->i_scale = p_strh->i_scale;
 379         tk->i_samplesize = p_strh->i_samplesize;
 380         msg_Dbg( p_demux, "stream[%d] rate:%d scale:%d samplesize:%d",
 381                  i, tk->i_rate, tk->i_scale, tk->i_samplesize );
 382
 383         switch( p_strh->i_type )
 384         {
 385             case( AVIFOURCC_auds ):
 386                 tk->i_cat   = AUDIO_ES;
 387                 tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
 388                                                   p_auds->p_wf->wFormatTag );
 389                 if( ( tk->i_blocksize = p_auds->p_wf->nBlockAlign ) == 0 )
 390                 {
 391                     if( p_auds->p_wf->wFormatTag == 1 )
 392                     {
 393                         tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
 394                     }
 395                     else
 396                     {
 397                         tk->i_blocksize = 1;
 398                     }
 399                 }
 400                 es_format_Init( &fmt, AUDIO_ES, tk->i_codec );
 401
 402                 fmt.audio.i_channels        = p_auds->p_wf->nChannels;
 403                 fmt.audio.i_rate            = p_auds->p_wf->nSamplesPerSec;
 404                 fmt.i_bitrate               = p_auds->p_wf->nAvgBytesPerSec*8;
 405                 fmt.audio.i_blockalign      = p_auds->p_wf->nBlockAlign;
 406                 fmt.audio.i_bitspersample   = p_auds->p_wf->wBitsPerSample;
 407                 fmt.b_packetized            = !tk->i_blocksize;
 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         /* */
1276         for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1277         {
1278             avi_track_t *p_stream = p_sys->track[i_stream];
1279
1280             if( !p_stream->b_activated )
1281                 continue;
1282
1283             AVI_TrackSeek( p_demux, i_stream, i_date );
1284         }
1285         p_sys->i_time = i_date;
1286         msg_Dbg( p_demux, "seek: "I64Fd" seconds", p_sys->i_time /1000000 );
1287         return VLC_SUCCESS;
1288     }
1289     else
1290     {
1291         msg_Err( p_demux, "shouldn't yet be executed" );
1292         return VLC_EGENERIC;
1293     }
1294 }
1295
1296 /*****************************************************************************
1297  * Control:
1298  *****************************************************************************/
1299 static double ControlGetPosition( demux_t *p_demux )
1300 {
1301     demux_sys_t *p_sys = p_demux->p_sys;
1302
1303     if( p_sys->i_length > 0 )
1304     {
1305         return (double)p_sys->i_time / (double)( p_sys->i_length * (mtime_t)1000000 );
1306     }
1307     else if( stream_Size( p_demux->s ) > 0 )
1308     {
1309         unsigned int i;
1310         int64_t i_tmp;
1311         int64_t i64 = 0;
1312
1313         /* search the more advanced selected es */
1314         for( i = 0; i < p_sys->i_track; i++ )
1315         {
1316             avi_track_t *tk = p_sys->track[i];
1317             if( tk->b_activated && tk->i_idxposc < tk->i_idxnb )
1318             {
1319                 i_tmp = tk->p_index[tk->i_idxposc].i_pos +
1320                         tk->p_index[tk->i_idxposc].i_length + 8;
1321                 if( i_tmp > i64 )
1322                 {
1323                     i64 = i_tmp;
1324                 }
1325             }
1326         }
1327         return (double)i64 / stream_Size( p_demux->s );
1328     }
1329     return 0.0;
1330 }
1331
1332 static int Control( demux_t *p_demux, int i_query, va_list args )
1333 {
1334     demux_sys_t *p_sys = p_demux->p_sys;
1335     int i;
1336     double   f, *pf;
1337     int64_t i64, *pi64;
1338     vlc_meta_t *p_meta;
1339
1340     switch( i_query )
1341     {
1342         case DEMUX_GET_POSITION:
1343             pf = (double*)va_arg( args, double * );
1344             *pf = ControlGetPosition( p_demux );
1345             return VLC_SUCCESS;
1346         case DEMUX_SET_POSITION:
1347             f = (double)va_arg( args, double );
1348             if( p_sys->b_seekable )
1349             {
1350                 i64 = (mtime_t)(1000000.0 * p_sys->i_length * f );
1351                 return Seek( p_demux, i64, (int)(f * 100) );
1352             }
1353             else
1354             {
1355                 int64_t i_pos = stream_Size( p_demux->s ) * f;
1356                 return stream_Seek( p_demux->s, i_pos );
1357             }
1358
1359         case DEMUX_GET_TIME:
1360             pi64 = (int64_t*)va_arg( args, int64_t * );
1361             *pi64 = p_sys->i_time;
1362             return VLC_SUCCESS;
1363
1364         case DEMUX_SET_TIME:
1365         {
1366             int i_percent = 0;
1367
1368             i64 = (int64_t)va_arg( args, int64_t );
1369             if( p_sys->i_length > 0 )
1370             {
1371                 i_percent = 100 * i64 / (p_sys->i_length*1000000);
1372             }
1373             else if( p_sys->i_time > 0 )
1374             {
1375                 i_percent = (int)( 100.0 * ControlGetPosition( p_demux ) *
1376                                    (double)i64 / (double)p_sys->i_time );
1377             }
1378             return Seek( p_demux, i64, i_percent );
1379         }
1380         case DEMUX_GET_LENGTH:
1381             pi64 = (int64_t*)va_arg( args, int64_t * );
1382             *pi64 = p_sys->i_length * (mtime_t)1000000;
1383             return VLC_SUCCESS;
1384
1385         case DEMUX_GET_FPS:
1386             pf = (double*)va_arg( args, double * );
1387             *pf = 0.0;
1388             for( i = 0; i < (int)p_sys->i_track; i++ )
1389             {
1390                 avi_track_t *tk = p_sys->track[i];
1391                 if( tk->i_cat == VIDEO_ES && tk->i_scale > 0)
1392                 {
1393                     *pf = (float)tk->i_rate / (float)tk->i_scale;
1394                     break;
1395                 }
1396             }
1397             return VLC_SUCCESS;
1398         case DEMUX_GET_META:
1399             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
1400             vlc_meta_Merge( p_meta,  p_sys->meta );
1401             return VLC_SUCCESS;
1402
1403         default:
1404             return VLC_EGENERIC;
1405     }
1406 }
1407
1408 /*****************************************************************************
1409  * Function to convert pts to chunk or byte
1410  *****************************************************************************/
1411
1412 static mtime_t AVI_PTSToChunk( avi_track_t *tk, mtime_t i_pts )
1413 {
1414     if( !tk->i_scale )
1415         return (mtime_t)0;
1416
1417     return (mtime_t)((int64_t)i_pts *
1418                      (int64_t)tk->i_rate /
1419                      (int64_t)tk->i_scale /
1420                      (int64_t)1000000 );
1421 }
1422 static mtime_t AVI_PTSToByte( avi_track_t *tk, mtime_t i_pts )
1423 {
1424     if( !tk->i_scale || !tk->i_samplesize )
1425         return (mtime_t)0;
1426
1427     return (mtime_t)((int64_t)i_pts *
1428                      (int64_t)tk->i_rate /
1429                      (int64_t)tk->i_scale /
1430                      (int64_t)1000000 *
1431                      (int64_t)tk->i_samplesize );
1432 }
1433
1434 static mtime_t AVI_GetDPTS( avi_track_t *tk, int64_t i_count )
1435 {
1436     mtime_t i_dpts = 0;
1437
1438     if( !tk->i_rate )
1439         return i_dpts;
1440
1441     i_dpts = (mtime_t)( (int64_t)1000000 *
1442                         (int64_t)i_count *
1443                         (int64_t)tk->i_scale /
1444                         (int64_t)tk->i_rate );
1445
1446     if( tk->i_samplesize )
1447     {
1448         return i_dpts / tk->i_samplesize;
1449     }
1450     return i_dpts;
1451 }
1452
1453 static mtime_t AVI_GetPTS( avi_track_t *tk )
1454 {
1455     if( tk->i_samplesize )
1456     {
1457         int64_t i_count = 0;
1458
1459         /* we need a valid entry we will emulate one */
1460         if( tk->i_idxposc == tk->i_idxnb )
1461         {
1462             if( tk->i_idxposc )
1463             {
1464                 /* use the last entry */
1465                 i_count = tk->p_index[tk->i_idxnb - 1].i_lengthtotal
1466                             + tk->p_index[tk->i_idxnb - 1].i_length;
1467             }
1468         }
1469         else
1470         {
1471             i_count = tk->p_index[tk->i_idxposc].i_lengthtotal;
1472         }
1473         return AVI_GetDPTS( tk, i_count + tk->i_idxposb );
1474     }
1475     else
1476     {
1477         if( tk->i_cat == AUDIO_ES )
1478         {
1479             return AVI_GetDPTS( tk, tk->i_blockno );
1480         }
1481         else
1482         {
1483             return AVI_GetDPTS( tk, tk->i_idxposc );
1484         }
1485     }
1486 }
1487
1488 static int AVI_StreamChunkFind( demux_t *p_demux, unsigned int i_stream )
1489 {
1490     demux_sys_t *p_sys = p_demux->p_sys;
1491     avi_packet_t avi_pk;
1492     int i_loop_count = 0;
1493
1494     /* find first chunk of i_stream that isn't in index */
1495
1496     if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
1497     {
1498         stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
1499         if( AVI_PacketNext( p_demux ) )
1500         {
1501             return VLC_EGENERIC;
1502         }
1503     }
1504     else
1505     {
1506         stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
1507     }
1508
1509     for( ;; )
1510     {
1511         if( p_demux->b_die ) return VLC_EGENERIC;
1512
1513         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1514         {
1515             msg_Warn( p_demux, "cannot get packet header" );
1516             return VLC_EGENERIC;
1517         }
1518         if( avi_pk.i_stream >= p_sys->i_track ||
1519             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1520         {
1521             if( AVI_PacketNext( p_demux ) )
1522             {
1523                 return VLC_EGENERIC;
1524             }
1525
1526             /* Prevents from eating all the CPU with broken files.
1527              * This value should be low enough so that it doesn't
1528              * affect the reading speed too much. */
1529             if( !(++i_loop_count % 1024) )
1530             {
1531                 if( p_demux->b_die ) return VLC_EGENERIC;
1532                 msleep( 10000 );
1533
1534                 if( !(i_loop_count % (1024 * 10)) )
1535                     msg_Warn( p_demux, "don't seem to find any data..." );
1536             }
1537         }
1538         else
1539         {
1540             /* add this chunk to the index */
1541             avi_entry_t index;
1542
1543             index.i_id = avi_pk.i_fourcc;
1544             index.i_flags =
1545                AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
1546                               avi_pk.i_peek);
1547             index.i_pos = avi_pk.i_pos;
1548             index.i_length = avi_pk.i_size;
1549             AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
1550
1551             if( avi_pk.i_stream == i_stream  )
1552             {
1553                 return VLC_SUCCESS;
1554             }
1555
1556             if( AVI_PacketNext( p_demux ) )
1557             {
1558                 return VLC_EGENERIC;
1559             }
1560         }
1561     }
1562 }
1563
1564 /* be sure that i_ck will be a valid index entry */
1565 static int AVI_StreamChunkSet( demux_t *p_demux, unsigned int i_stream,
1566                                unsigned int i_ck )
1567 {
1568     demux_sys_t *p_sys = p_demux->p_sys;
1569     avi_track_t *p_stream = p_sys->track[i_stream];
1570
1571     p_stream->i_idxposc = i_ck;
1572     p_stream->i_idxposb = 0;
1573
1574     if(  i_ck >= p_stream->i_idxnb )
1575     {
1576         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1577         do
1578         {
1579             p_stream->i_idxposc++;
1580             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1581             {
1582                 return VLC_EGENERIC;
1583             }
1584
1585         } while( p_stream->i_idxposc < i_ck );
1586     }
1587
1588     return VLC_SUCCESS;
1589 }
1590
1591 /* XXX FIXME up to now, we assume that all chunk are one after one */
1592 static int AVI_StreamBytesSet( demux_t    *p_demux,
1593                                unsigned int i_stream,
1594                                off_t   i_byte )
1595 {
1596     demux_sys_t *p_sys = p_demux->p_sys;
1597     avi_track_t *p_stream = p_sys->track[i_stream];
1598
1599     if( ( p_stream->i_idxnb > 0 )
1600         &&( i_byte < p_stream->p_index[p_stream->i_idxnb - 1].i_lengthtotal +
1601                 p_stream->p_index[p_stream->i_idxnb - 1].i_length ) )
1602     {
1603         /* index is valid to find the ck */
1604         /* uses dichototmie to be fast enougth */
1605         int i_idxposc = __MIN( p_stream->i_idxposc, p_stream->i_idxnb - 1 );
1606         int i_idxmax  = p_stream->i_idxnb;
1607         int i_idxmin  = 0;
1608         for( ;; )
1609         {
1610             if( p_stream->p_index[i_idxposc].i_lengthtotal > i_byte )
1611             {
1612                 i_idxmax  = i_idxposc ;
1613                 i_idxposc = ( i_idxmin + i_idxposc ) / 2 ;
1614             }
1615             else
1616             {
1617                 if( p_stream->p_index[i_idxposc].i_lengthtotal +
1618                         p_stream->p_index[i_idxposc].i_length <= i_byte)
1619                 {
1620                     i_idxmin  = i_idxposc ;
1621                     i_idxposc = (i_idxmax + i_idxposc ) / 2 ;
1622                 }
1623                 else
1624                 {
1625                     p_stream->i_idxposc = i_idxposc;
1626                     p_stream->i_idxposb = i_byte -
1627                             p_stream->p_index[i_idxposc].i_lengthtotal;
1628                     return VLC_SUCCESS;
1629                 }
1630             }
1631         }
1632
1633     }
1634     else
1635     {
1636         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1637         p_stream->i_idxposb = 0;
1638         do
1639         {
1640             p_stream->i_idxposc++;
1641             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1642             {
1643                 return VLC_EGENERIC;
1644             }
1645
1646         } while( p_stream->p_index[p_stream->i_idxposc].i_lengthtotal +
1647                     p_stream->p_index[p_stream->i_idxposc].i_length <= i_byte );
1648
1649         p_stream->i_idxposb = i_byte -
1650                        p_stream->p_index[p_stream->i_idxposc].i_lengthtotal;
1651         return VLC_SUCCESS;
1652     }
1653 }
1654
1655 static int AVI_TrackSeek( demux_t *p_demux,
1656                            int i_stream,
1657                            mtime_t i_date )
1658 {
1659     demux_sys_t  *p_sys = p_demux->p_sys;
1660     avi_track_t  *tk = p_sys->track[i_stream];
1661
1662 #define p_stream    p_sys->track[i_stream]
1663     mtime_t i_oldpts;
1664
1665     i_oldpts = AVI_GetPTS( p_stream );
1666
1667     if( !p_stream->i_samplesize )
1668     {
1669         if( AVI_StreamChunkSet( p_demux,
1670                                 i_stream,
1671                                 AVI_PTSToChunk( p_stream, i_date ) ) )
1672         {
1673             return VLC_EGENERIC;
1674         }
1675
1676         if( p_stream->i_cat == AUDIO_ES )
1677         {
1678             unsigned int i;
1679             tk->i_blockno = 0;
1680             for( i = 0; i < tk->i_idxposc; i++ )
1681             {
1682                 if( tk->i_blocksize > 0 )
1683                 {
1684                     tk->i_blockno += ( tk->p_index[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize;
1685                 }
1686                 else
1687                 {
1688                     tk->i_blockno++;
1689                 }
1690             }
1691         }
1692
1693         msg_Dbg( p_demux,
1694                  "old:"I64Fd" %s new "I64Fd,
1695                  i_oldpts,
1696                  i_oldpts > i_date ? ">" : "<",
1697                  i_date );
1698
1699         if( p_stream->i_cat == VIDEO_ES )
1700         {
1701             /* search key frame */
1702             //if( i_date < i_oldpts || 1 )
1703             {
1704                 while( p_stream->i_idxposc > 0 &&
1705                    !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1706                                                                 AVIIF_KEYFRAME ) )
1707                 {
1708                     if( AVI_StreamChunkSet( p_demux,
1709                                             i_stream,
1710                                             p_stream->i_idxposc - 1 ) )
1711                     {
1712                         return VLC_EGENERIC;
1713                     }
1714                 }
1715                 if( p_stream->p_es )
1716                     es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, p_stream->p_es, i_date );
1717             }
1718 #if 0
1719             else
1720             {
1721                 while( p_stream->i_idxposc < p_stream->i_idxnb &&
1722                         !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1723                                                                 AVIIF_KEYFRAME ) )
1724                 {
1725                     if( AVI_StreamChunkSet( p_demux,
1726                                             i_stream,
1727                                             p_stream->i_idxposc + 1 ) )
1728                     {
1729                         return VLC_EGENERIC;
1730                     }
1731                 }
1732             }
1733 #endif
1734         }
1735     }
1736     else
1737     {
1738         if( AVI_StreamBytesSet( p_demux,
1739                                 i_stream,
1740                                 AVI_PTSToByte( p_stream, i_date ) ) )
1741         {
1742             return VLC_EGENERIC;
1743         }
1744     }
1745     return VLC_SUCCESS;
1746 #undef p_stream
1747 }
1748
1749 /****************************************************************************
1750  * Return VLC_TRUE if it's a key frame
1751  ****************************************************************************/
1752 static int AVI_GetKeyFlag( vlc_fourcc_t i_fourcc, uint8_t *p_byte )
1753 {
1754     switch( i_fourcc )
1755     {
1756         case FOURCC_DIV1:
1757             /* we have:
1758              *  startcode:      0x00000100   32bits
1759              *  framenumber     ?             5bits
1760              *  piture type     0(I),1(P)     2bits
1761              */
1762             if( GetDWBE( p_byte ) != 0x00000100 )
1763             {
1764                 /* it's not an msmpegv1 stream, strange...*/
1765                 return AVIIF_KEYFRAME;
1766             }
1767             return p_byte[4] & 0x06 ? 0 : AVIIF_KEYFRAME;
1768
1769         case FOURCC_DIV2:
1770         case FOURCC_DIV3:   /* wmv1 also */
1771             /* we have
1772              *  picture type    0(I),1(P)     2bits
1773              */
1774             return p_byte[0] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1775         case FOURCC_mp4v:
1776             /* we should find first occurrence of 0x000001b6 (32bits)
1777              *  startcode:      0x000001b6   32bits
1778              *  piture type     0(I),1(P)     2bits
1779              */
1780             if( GetDWBE( p_byte ) != 0x000001b6 )
1781             {
1782                 /* not true , need to find the first VOP header */
1783                 return AVIIF_KEYFRAME;
1784             }
1785             return p_byte[4] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1786
1787         default:
1788             /* I can't do it, so say yes */
1789             return AVIIF_KEYFRAME;
1790     }
1791 }
1792
1793 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t i_codec )
1794 {
1795     switch( i_cat )
1796     {
1797         case AUDIO_ES:
1798             wf_tag_to_fourcc( i_codec, &i_codec, NULL );
1799             return i_codec;
1800
1801         case VIDEO_ES:
1802             /* XXX DIV1 <- msmpeg4v1, DIV2 <- msmpeg4v2, DIV3 <- msmpeg4v3, mp4v for mpeg4 */
1803             switch( i_codec )
1804             {
1805                 case FOURCC_1:
1806                     return VLC_FOURCC('m','r','l','e');
1807                 case FOURCC_DIV1:
1808                 case FOURCC_div1:
1809                 case FOURCC_MPG4:
1810                 case FOURCC_mpg4:
1811                     return FOURCC_DIV1;
1812                 case FOURCC_DIV2:
1813                 case FOURCC_div2:
1814                 case FOURCC_MP42:
1815                 case FOURCC_mp42:
1816                 case FOURCC_MPG3:
1817                 case FOURCC_mpg3:
1818                     return FOURCC_DIV2;
1819                 case FOURCC_div3:
1820                 case FOURCC_MP43:
1821                 case FOURCC_mp43:
1822                 case FOURCC_DIV3:
1823                 case FOURCC_DIV4:
1824                 case FOURCC_div4:
1825                 case FOURCC_DIV5:
1826                 case FOURCC_div5:
1827                 case FOURCC_DIV6:
1828                 case FOURCC_div6:
1829                 case FOURCC_AP41:
1830                 case FOURCC_3IV1:
1831                 case FOURCC_3iv1:
1832                 case FOURCC_3IVD:
1833                 case FOURCC_3ivd:
1834                 case FOURCC_3VID:
1835                 case FOURCC_3vid:
1836                     return FOURCC_DIV3;
1837                 case FOURCC_DIVX:
1838                 case FOURCC_divx:
1839                 case FOURCC_MP4S:
1840                 case FOURCC_mp4s:
1841                 case FOURCC_M4S2:
1842                 case FOURCC_m4s2:
1843                 case FOURCC_xvid:
1844                 case FOURCC_XVID:
1845                 case FOURCC_XviD:
1846                 case FOURCC_DX50:
1847                 case FOURCC_dx50:
1848                 case FOURCC_mp4v:
1849                 case FOURCC_4:
1850                 case FOURCC_3IV2:
1851                 case FOURCC_3iv2:
1852                     return FOURCC_mp4v;
1853             }
1854         default:
1855             return VLC_FOURCC( 'u', 'n', 'd', 'f' );
1856     }
1857 }
1858
1859 /****************************************************************************
1860  *
1861  ****************************************************************************/
1862 static void AVI_ParseStreamHeader( vlc_fourcc_t i_id,
1863                                    unsigned int *pi_number, unsigned int *pi_type )
1864 {
1865 #define SET_PTR( p, v ) if( p ) *(p) = (v);
1866     int c1, c2;
1867
1868     c1 = ((uint8_t *)&i_id)[0];
1869     c2 = ((uint8_t *)&i_id)[1];
1870
1871     if( c1 < '0' || c1 > '9' || c2 < '0' || c2 > '9' )
1872     {
1873         SET_PTR( pi_number, 100 ); /* > max stream number */
1874         SET_PTR( pi_type, UNKNOWN_ES );
1875     }
1876     else
1877     {
1878         SET_PTR( pi_number, (c1 - '0') * 10 + (c2 - '0' ) );
1879         switch( VLC_TWOCC( ((uint8_t *)&i_id)[2], ((uint8_t *)&i_id)[3] ) )
1880         {
1881             case AVITWOCC_wb:
1882                 SET_PTR( pi_type, AUDIO_ES );
1883                 break;
1884             case AVITWOCC_dc:
1885             case AVITWOCC_db:
1886                 SET_PTR( pi_type, VIDEO_ES );
1887                 break;
1888             default:
1889                 SET_PTR( pi_type, UNKNOWN_ES );
1890                 break;
1891         }
1892     }
1893 #undef SET_PTR
1894 }
1895
1896 /****************************************************************************
1897  *
1898  ****************************************************************************/
1899 static int AVI_PacketGetHeader( demux_t *p_demux, avi_packet_t *p_pk )
1900 {
1901     uint8_t  *p_peek;
1902
1903     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 )
1904     {
1905         return VLC_EGENERIC;
1906     }
1907     p_pk->i_fourcc  = VLC_FOURCC( p_peek[0], p_peek[1], p_peek[2], p_peek[3] );
1908     p_pk->i_size    = GetDWLE( p_peek + 4 );
1909     p_pk->i_pos     = stream_Tell( p_demux->s );
1910     if( p_pk->i_fourcc == AVIFOURCC_LIST || p_pk->i_fourcc == AVIFOURCC_RIFF )
1911     {
1912         p_pk->i_type = VLC_FOURCC( p_peek[8],  p_peek[9],
1913                                    p_peek[10], p_peek[11] );
1914     }
1915     else
1916     {
1917         p_pk->i_type = 0;
1918     }
1919
1920     memcpy( p_pk->i_peek, p_peek + 8, 8 );
1921
1922     AVI_ParseStreamHeader( p_pk->i_fourcc, &p_pk->i_stream, &p_pk->i_cat );
1923     return VLC_SUCCESS;
1924 }
1925
1926 static int AVI_PacketNext( demux_t *p_demux )
1927 {
1928     avi_packet_t    avi_ck;
1929     int             i_skip = 0;
1930
1931     if( AVI_PacketGetHeader( p_demux, &avi_ck ) )
1932     {
1933         return VLC_EGENERIC;
1934     }
1935
1936     if( avi_ck.i_fourcc == AVIFOURCC_LIST &&
1937         ( avi_ck.i_type == AVIFOURCC_rec || avi_ck.i_type == AVIFOURCC_movi ) )
1938     {
1939         i_skip = 12;
1940     }
1941     else if( avi_ck.i_fourcc == AVIFOURCC_RIFF &&
1942              avi_ck.i_type == AVIFOURCC_AVIX )
1943     {
1944         i_skip = 24;
1945     }
1946     else
1947     {
1948         i_skip = __EVEN( avi_ck.i_size ) + 8;
1949     }
1950
1951     if( stream_Read( p_demux->s, NULL, i_skip ) != i_skip )
1952     {
1953         return VLC_EGENERIC;
1954     }
1955     return VLC_SUCCESS;
1956 }
1957
1958 static int AVI_PacketRead( demux_t   *p_demux,
1959                            avi_packet_t     *p_pk,
1960                            block_t          **pp_frame )
1961 {
1962     size_t i_size;
1963
1964     i_size = __EVEN( p_pk->i_size + 8 );
1965
1966     if( ( *pp_frame = stream_Block( p_demux->s, i_size ) ) == NULL )
1967     {
1968         return VLC_EGENERIC;
1969     }
1970     (*pp_frame)->p_buffer += 8;
1971     (*pp_frame)->i_buffer -= 8;
1972
1973     if( i_size != p_pk->i_size + 8 )
1974     {
1975         (*pp_frame)->i_buffer--;
1976     }
1977
1978     return VLC_SUCCESS;
1979 }
1980
1981 static int AVI_PacketSearch( demux_t *p_demux )
1982 {
1983     demux_sys_t     *p_sys = p_demux->p_sys;
1984     avi_packet_t    avi_pk;
1985     int             i_count = 0;
1986
1987     for( ;; )
1988     {
1989         if( stream_Read( p_demux->s, NULL, 1 ) != 1 )
1990         {
1991             return VLC_EGENERIC;
1992         }
1993         AVI_PacketGetHeader( p_demux, &avi_pk );
1994         if( avi_pk.i_stream < p_sys->i_track &&
1995             ( avi_pk.i_cat == AUDIO_ES || avi_pk.i_cat == VIDEO_ES ) )
1996         {
1997             return VLC_SUCCESS;
1998         }
1999         switch( avi_pk.i_fourcc )
2000         {
2001             case AVIFOURCC_JUNK:
2002             case AVIFOURCC_LIST:
2003             case AVIFOURCC_RIFF:
2004             case AVIFOURCC_idx1:
2005                 return VLC_SUCCESS;
2006         }
2007
2008         /* Prevents from eating all the CPU with broken files.
2009          * This value should be low enough so that it doesn't affect the
2010          * reading speed too much (not that we care much anyway because
2011          * this code is called only on broken files). */
2012         if( !(++i_count % 1024) )
2013         {
2014             if( p_demux->b_die ) return VLC_EGENERIC;
2015
2016             msleep( 10000 );
2017             if( !(i_count % (1024 * 10)) )
2018                 msg_Warn( p_demux, "trying to resync..." );
2019         }
2020     }
2021 }
2022
2023 /****************************************************************************
2024  * Index stuff.
2025  ****************************************************************************/
2026 static void AVI_IndexAddEntry( demux_sys_t *p_sys,
2027                                int i_stream,
2028                                avi_entry_t *p_index)
2029 {
2030     avi_track_t *tk = p_sys->track[i_stream];
2031
2032     /* Update i_movi_lastchunk_pos */
2033     if( p_sys->i_movi_lastchunk_pos < p_index->i_pos )
2034     {
2035         p_sys->i_movi_lastchunk_pos = p_index->i_pos;
2036     }
2037
2038     /* add the entry */
2039     if( tk->i_idxnb >= tk->i_idxmax )
2040     {
2041         tk->i_idxmax += 16384;
2042         tk->p_index = realloc( tk->p_index,
2043                                tk->i_idxmax * sizeof( avi_entry_t ) );
2044         if( tk->p_index == NULL )
2045         {
2046             return;
2047         }
2048     }
2049     /* calculate cumulate length */
2050     if( tk->i_idxnb > 0 )
2051     {
2052         p_index->i_lengthtotal =
2053             tk->p_index[tk->i_idxnb - 1].i_length +
2054                 tk->p_index[tk->i_idxnb - 1].i_lengthtotal;
2055     }
2056     else
2057     {
2058         p_index->i_lengthtotal = 0;
2059     }
2060
2061     tk->p_index[tk->i_idxnb++] = *p_index;
2062 }
2063
2064 static int AVI_IndexLoad_idx1( demux_t *p_demux )
2065 {
2066     demux_sys_t *p_sys = p_demux->p_sys;
2067
2068     avi_chunk_list_t    *p_riff;
2069     avi_chunk_list_t    *p_movi;
2070     avi_chunk_idx1_t    *p_idx1;
2071
2072     unsigned int i_stream;
2073     unsigned int i_index;
2074     off_t        i_offset;
2075     unsigned int i;
2076
2077     vlc_bool_t b_keyset[100];
2078
2079     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2080     p_idx1 = AVI_ChunkFind( p_riff, AVIFOURCC_idx1, 0);
2081     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2082
2083     if( !p_idx1 )
2084     {
2085         msg_Warn( p_demux, "cannot find idx1 chunk, no index defined" );
2086         return VLC_EGENERIC;
2087     }
2088
2089     /* *** calculate offset *** */
2090     /* Well, avi is __SHIT__ so test more than one entry
2091      * (needed for some avi files) */
2092     i_offset = 0;
2093     for( i = 0; i < __MIN( p_idx1->i_entry_count, 10 ); i++ )
2094     {
2095         if( p_idx1->entry[i].i_pos < p_movi->i_chunk_pos )
2096         {
2097             i_offset = p_movi->i_chunk_pos + 8;
2098             break;
2099         }
2100     }
2101
2102     /* Reset b_keyset */
2103     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2104         b_keyset[i_stream] = VLC_FALSE;
2105
2106     for( i_index = 0; i_index < p_idx1->i_entry_count; i_index++ )
2107     {
2108         unsigned int i_cat;
2109
2110         AVI_ParseStreamHeader( p_idx1->entry[i_index].i_fourcc,
2111                                &i_stream,
2112                                &i_cat );
2113         if( i_stream < p_sys->i_track &&
2114             i_cat == p_sys->track[i_stream]->i_cat )
2115         {
2116             avi_entry_t index;
2117             index.i_id      = p_idx1->entry[i_index].i_fourcc;
2118             index.i_flags   =
2119                 p_idx1->entry[i_index].i_flags&(~AVIIF_FIXKEYFRAME);
2120             index.i_pos     = p_idx1->entry[i_index].i_pos + i_offset;
2121             index.i_length  = p_idx1->entry[i_index].i_length;
2122             AVI_IndexAddEntry( p_sys, i_stream, &index );
2123
2124             if( index.i_flags&AVIIF_KEYFRAME )
2125                 b_keyset[i_stream] = VLC_TRUE;
2126         }
2127     }
2128
2129     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2130     {
2131         if( !b_keyset[i_stream] )
2132         {
2133             avi_track_t *tk = p_sys->track[i_stream];
2134
2135             msg_Dbg( p_demux, "no key frame set for track %d", i_stream );
2136             for( i_index = 0; i_index < tk->i_idxnb; i_index++ )
2137                 tk->p_index[i_index].i_flags |= AVIIF_KEYFRAME;
2138         }
2139     }
2140     return VLC_SUCCESS;
2141 }
2142
2143 static void __Parse_indx( demux_t    *p_demux,
2144                           int               i_stream,
2145                           avi_chunk_indx_t  *p_indx )
2146 {
2147     demux_sys_t         *p_sys    = p_demux->p_sys;
2148     avi_entry_t     index;
2149     int32_t             i;
2150
2151     msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_entriesinuse );
2152     if( p_indx->i_indexsubtype == 0 )
2153     {
2154         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2155         {
2156             index.i_id      = p_indx->i_id;
2157             index.i_flags   = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2158             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.std[i].i_offset - 8;
2159             index.i_length  = p_indx->idx.std[i].i_size&0x7fffffff;
2160
2161             AVI_IndexAddEntry( p_sys, i_stream, &index );
2162         }
2163     }
2164     else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
2165     {
2166         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2167         {
2168             index.i_id      = p_indx->i_id;
2169             index.i_flags   = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2170             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.field[i].i_offset - 8;
2171             index.i_length  = p_indx->idx.field[i].i_size;
2172
2173             AVI_IndexAddEntry( p_sys, i_stream, &index );
2174         }
2175     }
2176     else
2177     {
2178         msg_Warn( p_demux, "unknown subtype index(0x%x)", p_indx->i_indexsubtype );
2179     }
2180 }
2181
2182 static void AVI_IndexLoad_indx( demux_t *p_demux )
2183 {
2184     demux_sys_t         *p_sys = p_demux->p_sys;
2185     unsigned int        i_stream;
2186     int32_t             i;
2187
2188     avi_chunk_list_t    *p_riff;
2189     avi_chunk_list_t    *p_hdrl;
2190
2191     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2192     p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
2193
2194     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2195     {
2196         avi_chunk_list_t    *p_strl;
2197         avi_chunk_indx_t    *p_indx;
2198
2199 #define p_stream  p_sys->track[i_stream]
2200         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i_stream );
2201         p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0 );
2202
2203         if( !p_indx )
2204         {
2205             msg_Warn( p_demux, "cannot find indx (misdetect/broken OpenDML "
2206                                "file?)" );
2207             continue;
2208         }
2209
2210         if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS )
2211         {
2212             __Parse_indx( p_demux, i_stream, p_indx );
2213         }
2214         else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
2215         {
2216             avi_chunk_t    ck_sub;
2217             for( i = 0; i < p_indx->i_entriesinuse; i++ )
2218             {
2219                 if( stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset )||
2220                     AVI_ChunkRead( p_demux->s, &ck_sub, NULL  ) )
2221                 {
2222                     break;
2223                 }
2224                 __Parse_indx( p_demux, i_stream, &ck_sub.indx );
2225             }
2226         }
2227         else
2228         {
2229             msg_Warn( p_demux, "unknown type index(0x%x)", p_indx->i_indextype );
2230         }
2231 #undef p_stream
2232     }
2233 }
2234
2235 static void AVI_IndexLoad( demux_t *p_demux )
2236 {
2237     demux_sys_t *p_sys = p_demux->p_sys;
2238     unsigned int i_stream;
2239
2240     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2241     {
2242         p_sys->track[i_stream]->i_idxnb  = 0;
2243         p_sys->track[i_stream]->i_idxmax = 0;
2244         p_sys->track[i_stream]->p_index  = NULL;
2245     }
2246
2247     if( p_sys->b_odml )
2248     {
2249         AVI_IndexLoad_indx( p_demux );
2250     }
2251     else  if( AVI_IndexLoad_idx1( p_demux ) )
2252     {
2253         /* try indx if idx1 failed as some "normal" file have indx too */
2254         AVI_IndexLoad_indx( p_demux );
2255     }
2256
2257     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2258     {
2259         msg_Dbg( p_demux, "stream[%d] created %d index entries",
2260                 i_stream, p_sys->track[i_stream]->i_idxnb );
2261     }
2262 }
2263
2264 static void AVI_IndexCreate( demux_t *p_demux )
2265 {
2266     demux_sys_t *p_sys = p_demux->p_sys;
2267
2268     avi_chunk_list_t    *p_riff;
2269     avi_chunk_list_t    *p_movi;
2270
2271     unsigned int i_stream;
2272     off_t i_movi_end;
2273
2274     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2275     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2276
2277     if( !p_movi )
2278     {
2279         msg_Err( p_demux, "cannot find p_movi" );
2280         return;
2281     }
2282
2283     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2284     {
2285         p_sys->track[i_stream]->i_idxnb  = 0;
2286         p_sys->track[i_stream]->i_idxmax = 0;
2287         p_sys->track[i_stream]->p_index  = NULL;
2288     }
2289     i_movi_end = __MIN( (off_t)(p_movi->i_chunk_pos + p_movi->i_chunk_size),
2290                         stream_Size( p_demux->s ) );
2291
2292     stream_Seek( p_demux->s, p_movi->i_chunk_pos + 12 );
2293     msg_Warn( p_demux, "creating index from LIST-movi, will take time !" );
2294
2295
2296     /* Only show dialog if AVI is > 10MB */
2297     p_demux->p_sys->i_dialog_id = -1;
2298     if( stream_Size( p_demux->s ) > 10000000 )
2299     {
2300         p_demux->p_sys->i_dialog_id = intf_IntfProgress( p_demux,
2301                                         _( "Fixing AVI Index..." ),
2302                                         0.0 );
2303         p_demux->p_sys->last_update = mdate();
2304     }
2305
2306     for( ;; )
2307     {
2308         avi_packet_t pk;
2309
2310         if( p_demux->b_die )
2311         {
2312             return;
2313         }
2314
2315         /* Don't update dialog too often */
2316         if( p_demux->p_sys->i_dialog_id > 0 &&
2317             mdate() - p_demux->p_sys->last_update > 100000 )
2318         {
2319             int64_t i_pos = stream_Tell( p_demux->s )* 100 /
2320                             stream_Size( p_demux->s );
2321             float f_pos = (float)i_pos;
2322             p_demux->p_sys->last_update = mdate();
2323             intf_ProgressUpdate( p_demux, p_demux->p_sys->i_dialog_id,
2324                                  _( "Fixing AVI Index..." ), f_pos, -1 );
2325         }
2326
2327         if( AVI_PacketGetHeader( p_demux, &pk ) )
2328         {
2329             break;
2330         }
2331         if( pk.i_stream < p_sys->i_track &&
2332             pk.i_cat == p_sys->track[pk.i_stream]->i_cat )
2333         {
2334             avi_entry_t index;
2335             index.i_id      = pk.i_fourcc;
2336             index.i_flags   =
2337                AVI_GetKeyFlag(p_sys->track[pk.i_stream]->i_codec, pk.i_peek);
2338             index.i_pos     = pk.i_pos;
2339             index.i_length  = pk.i_size;
2340             AVI_IndexAddEntry( p_sys, pk.i_stream, &index );
2341         }
2342         else
2343         {
2344             switch( pk.i_fourcc )
2345             {
2346                 case AVIFOURCC_idx1:
2347                     if( p_sys->b_odml )
2348                     {
2349                         avi_chunk_list_t *p_sysx;
2350                         p_sysx = AVI_ChunkFind( &p_sys->ck_root,
2351                                                 AVIFOURCC_RIFF, 1 );
2352
2353                         msg_Dbg( p_demux, "looking for new RIFF chunk" );
2354                         if( stream_Seek( p_demux->s, p_sysx->i_chunk_pos + 24))
2355                         {
2356                             goto print_stat;
2357                         }
2358                         break;
2359                     }
2360                     goto print_stat;
2361                 case AVIFOURCC_RIFF:
2362                         msg_Dbg( p_demux, "new RIFF chunk found" );
2363                 case AVIFOURCC_rec:
2364                 case AVIFOURCC_JUNK:
2365                     break;
2366                 default:
2367                     msg_Warn( p_demux, "need resync, probably broken avi" );
2368                     if( AVI_PacketSearch( p_demux ) )
2369                     {
2370                         msg_Warn( p_demux, "lost sync, abord index creation" );
2371                         goto print_stat;
2372                     }
2373             }
2374         }
2375
2376         if( ( !p_sys->b_odml && pk.i_pos + pk.i_size >= i_movi_end ) ||
2377             AVI_PacketNext( p_demux ) )
2378         {
2379             break;
2380         }
2381     }
2382
2383 print_stat:
2384     if( p_demux->p_sys->i_dialog_id > 0 )
2385     {
2386         intf_UserHide( p_demux, p_demux->p_sys->i_dialog_id );
2387     }
2388
2389     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2390     {
2391         msg_Dbg( p_demux,
2392                 "stream[%d] creating %d index entries",
2393                 i_stream,
2394                 p_sys->track[i_stream]->i_idxnb );
2395     }
2396 }
2397
2398 /*****************************************************************************
2399  * Stream management
2400  *****************************************************************************/
2401 static int AVI_TrackStopFinishedStreams( demux_t *p_demux )
2402 {
2403     demux_sys_t *p_sys = p_demux->p_sys;
2404     unsigned int i;
2405     int b_end = VLC_TRUE;
2406
2407     for( i = 0; i < p_sys->i_track; i++ )
2408     {
2409         avi_track_t *tk = p_sys->track[i];
2410         if( tk->i_idxposc >= tk->i_idxnb )
2411         {
2412             tk->b_activated = VLC_FALSE;
2413             if( tk->p_es ) es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE, tk->p_es, VLC_FALSE );
2414         }
2415         else
2416         {
2417             b_end = VLC_FALSE;
2418         }
2419     }
2420     return( b_end );
2421 }
2422
2423 /****************************************************************************
2424  * AVI_MovieGetLength give max streams length in second
2425  ****************************************************************************/
2426 static mtime_t  AVI_MovieGetLength( demux_t *p_demux )
2427 {
2428     demux_sys_t  *p_sys = p_demux->p_sys;
2429     mtime_t      i_maxlength = 0;
2430     unsigned int i;
2431
2432     for( i = 0; i < p_sys->i_track; i++ )
2433     {
2434         avi_track_t *tk = p_sys->track[i];
2435         mtime_t i_length;
2436
2437         /* fix length for each stream */
2438         if( tk->i_idxnb < 1 || !tk->p_index )
2439         {
2440             continue;
2441         }
2442
2443         if( tk->i_samplesize )
2444         {
2445             i_length = AVI_GetDPTS( tk,
2446                                     tk->p_index[tk->i_idxnb-1].i_lengthtotal +
2447                                         tk->p_index[tk->i_idxnb-1].i_length );
2448         }
2449         else
2450         {
2451             i_length = AVI_GetDPTS( tk, tk->i_idxnb );
2452         }
2453         i_length /= (mtime_t)1000000;    /* in seconds */
2454
2455         msg_Dbg( p_demux,
2456                  "stream[%d] length:"I64Fd" (based on index)",
2457                  i,
2458                  i_length );
2459         i_maxlength = __MAX( i_maxlength, i_length );
2460     }
2461
2462     return i_maxlength;
2463 }