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) 2001-2009 the VideoLAN team
   5  * $Id$
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_plugin.h>
  33 #include <vlc_demux.h>
  34 #include <vlc_input.h>
  35
  36 #include <vlc_dialog.h>
  37
  38 #include <vlc_meta.h>
  39 #include <vlc_codecs.h>
  40 #include <vlc_charset.h>
  41 #include <vlc_memory.h>
  42
  43 #include "libavi.h"
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48
  49 #define INTERLEAVE_TEXT N_("Force interleaved method" )
  50 #define INTERLEAVE_LONGTEXT N_( "Force interleaved method." )
  51
  52 #define INDEX_TEXT N_("Force index creation")
  53 #define INDEX_LONGTEXT N_( \
  54     "Recreate a index for the AVI file. Use this if your AVI file is damaged "\
  55     "or incomplete (not seekable)." )
  56
  57 static int  Open ( vlc_object_t * );
  58 static void Close( vlc_object_t * );
  59
  60 static const int pi_index[] = {0,1,2};
  61
  62 static const char *const ppsz_indexes[] = { N_("Ask for action"),
  63                                             N_("Always fix"),
  64                                             N_("Never fix") };
  65
  66 vlc_module_begin ()
  67     set_shortname( "AVI" )
  68     set_description( N_("AVI demuxer") )
  69     set_capability( "demux", 212 )
  70     set_category( CAT_INPUT )
  71     set_subcategory( SUBCAT_INPUT_DEMUX )
  72
  73     add_bool( "avi-interleaved", false, NULL,
  74               INTERLEAVE_TEXT, INTERLEAVE_LONGTEXT, true )
  75     add_integer( "avi-index", 0, NULL,
  76               INDEX_TEXT, INDEX_LONGTEXT, false )
  77         change_integer_list( pi_index, ppsz_indexes, NULL )
  78
  79     set_callbacks( Open, Close )
  80 vlc_module_end ()
  81
  82 /*****************************************************************************
  83  * Local prototypes
  84  *****************************************************************************/
  85 static int Control         ( demux_t *, int, va_list );
  86 static int Seek            ( demux_t *, mtime_t, int );
  87 static int Demux_Seekable  ( demux_t * );
  88 static int Demux_UnSeekable( demux_t * );
  89
  90 #define __ABS( x ) ( (x) < 0 ? (-(x)) : (x) )
  91
  92 typedef struct
  93 {
  94     vlc_fourcc_t i_fourcc;
  95     off_t        i_pos;
  96     uint32_t     i_size;
  97     vlc_fourcc_t i_type;     /* only for AVIFOURCC_LIST */
  98
  99     uint8_t      i_peek[8];  /* first 8 bytes */
 100
 101     unsigned int i_stream;
 102     unsigned int i_cat;
 103 } avi_packet_t;
 104
 105
 106 typedef struct
 107 {
 108     vlc_fourcc_t i_id;
 109     uint32_t     i_flags;
 110     off_t        i_pos;
 111     uint32_t     i_length;
 112     int64_t      i_lengthtotal;
 113
 114 } avi_entry_t;
 115
 116 typedef struct
 117 {
 118     bool            b_activated;
 119     bool            b_eof;
 120
 121     unsigned int    i_cat; /* AUDIO_ES, VIDEO_ES */
 122     vlc_fourcc_t    i_codec;
 123
 124     int             i_rate;
 125     int             i_scale;
 126     unsigned int    i_samplesize;
 127
 128     es_out_id_t     *p_es;
 129
 130     /* Avi Index */
 131     avi_entry_t     *p_index;
 132     unsigned int    i_idxnb;
 133     unsigned int    i_idxmax;
 134
 135     unsigned int    i_idxposc;  /* numero of chunk */
 136     unsigned int    i_idxposb;  /* byte in the current chunk */
 137
 138     /* For VBR audio only */
 139     unsigned int    i_blockno;
 140     unsigned int    i_blocksize;
 141
 142     /* For muxed streams */
 143     stream_t        *p_out_muxed;
 144 } avi_track_t;
 145
 146 struct demux_sys_t
 147 {
 148     mtime_t i_time;
 149     mtime_t i_length;
 150
 151     bool  b_seekable;
 152     bool  b_muxed;
 153     avi_chunk_t ck_root;
 154
 155     bool  b_odml;
 156
 157     off_t   i_movi_begin;
 158     off_t   i_movi_lastchunk_pos;   /* XXX position of last valid chunk */
 159
 160     /* number of streams and information */
 161     unsigned int i_track;
 162     avi_track_t  **track;
 163
 164     /* meta */
 165     vlc_meta_t  *meta;
 166
 167     unsigned int       i_attachment;
 168     input_attachment_t **attachment;
 169 };
 170
 171 static inline off_t __EVEN( off_t i )
 172 {
 173     return (i & 1) ? i + 1 : i;
 174 }
 175
 176 static mtime_t AVI_PTSToChunk( avi_track_t *, mtime_t i_pts );
 177 static mtime_t AVI_PTSToByte ( avi_track_t *, mtime_t i_pts );
 178 static mtime_t AVI_GetDPTS   ( avi_track_t *, int64_t i_count );
 179 static mtime_t AVI_GetPTS    ( avi_track_t * );
 180
 181
 182 static int AVI_StreamChunkFind( demux_t *, unsigned int i_stream );
 183 static int AVI_StreamChunkSet ( demux_t *,
 184                                 unsigned int i_stream, unsigned int i_ck );
 185 static int AVI_StreamBytesSet ( demux_t *,
 186                                 unsigned int i_stream, off_t   i_byte );
 187
 188 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t );
 189 static int   AVI_GetKeyFlag    ( vlc_fourcc_t , uint8_t * );
 190
 191 static int AVI_PacketGetHeader( demux_t *, avi_packet_t *p_pk );
 192 static int AVI_PacketNext     ( demux_t * );
 193 static int AVI_PacketRead     ( demux_t *, avi_packet_t *, block_t **);
 194 static int AVI_PacketSearch   ( demux_t * );
 195
 196 static void AVI_IndexLoad    ( demux_t * );
 197 static void AVI_IndexCreate  ( demux_t * );
 198 static void AVI_IndexAddEntry( demux_sys_t *, int, avi_entry_t * );
 199
 200 static void AVI_ExtractSubtitle( demux_t *, avi_chunk_list_t *, avi_chunk_STRING_t * );
 201
 202 static mtime_t  AVI_MovieGetLength( demux_t * );
 203
 204 /*****************************************************************************
 205  * Stream management
 206  *****************************************************************************/
 207 static int        AVI_TrackSeek  ( demux_t *, int, mtime_t );
 208 static int        AVI_TrackStopFinishedStreams( demux_t *);
 209
 210 /* Remarks:
 211  - For VBR mp3 stream:
 212     count blocks by rounded-up chunksizes instead of chunks
 213     we need full emulation of dshow avi demuxer bugs :(
 214     fixes silly nandub-style a-v delaying in avi with vbr mp3...
 215     (from mplayer 2002/08/02)
 216  - to complete....
 217  */
 218
 219 /*****************************************************************************
 220  * Open: check file and initializes AVI structures
 221  *****************************************************************************/
 222 static int Open( vlc_object_t * p_this )
 223 {
 224     demux_t  *p_demux = (demux_t *)p_this;
 225     demux_sys_t     *p_sys;
 226
 227     bool       b_index = false;
 228     int              i_do_index;
 229
 230     avi_chunk_list_t    *p_riff;
 231     avi_chunk_list_t    *p_hdrl, *p_movi;
 232     avi_chunk_avih_t    *p_avih;
 233
 234     unsigned int i_track;
 235     unsigned int i, i_peeker;
 236
 237     const uint8_t *p_peek;
 238
 239     /* Is it an avi file ? */
 240     if( stream_Peek( p_demux->s, &p_peek, 200 ) < 200 ) return VLC_EGENERIC;
 241
 242     for( i_peeker = 0; i_peeker < 188; i_peeker++ )
 243     {
 244         if( !strncmp( (char *)&p_peek[0], "RIFF", 4 ) && !strncmp( (char *)&p_peek[8], "AVI ", 4 ) )
 245             break;
 246         if( !strncmp( (char *)&p_peek[0], "ON2 ", 4 ) && !strncmp( (char *)&p_peek[8], "ON2f", 4 ) )
 247             break;
 248         p_peek++;
 249     }
 250     if( i_peeker == 188 )
 251     {
 252         return VLC_EGENERIC;
 253     }
 254
 255     /* Initialize input  structures. */
 256     p_sys = p_demux->p_sys = malloc( sizeof(demux_sys_t) );
 257     memset( p_sys, 0, sizeof( demux_sys_t ) );
 258     p_sys->i_time   = 0;
 259     p_sys->i_length = 0;
 260     p_sys->i_movi_lastchunk_pos = 0;
 261     p_sys->b_odml   = false;
 262     p_sys->b_muxed  = false;
 263     p_sys->i_track  = 0;
 264     p_sys->track    = NULL;
 265     p_sys->meta     = NULL;
 266     TAB_INIT(p_sys->i_attachment, p_sys->attachment);
 267
 268     stream_Control( p_demux->s, STREAM_CAN_FASTSEEK, &p_sys->b_seekable );
 269
 270     p_demux->pf_control = Control;
 271     p_demux->pf_demux = Demux_Seekable;
 272
 273     /* For unseekable stream, automaticaly use Demux_UnSeekable */
 274     if( !p_sys->b_seekable
 275      || var_InheritInteger( p_demux, "avi-interleaved" ) )
 276     {
 277         p_demux->pf_demux = Demux_UnSeekable;
 278     }
 279
 280     if( i_peeker > 0 )
 281     {
 282         stream_Read( p_demux->s, NULL, i_peeker );
 283     }
 284
 285     if( AVI_ChunkReadRoot( p_demux->s, &p_sys->ck_root ) )
 286     {
 287         msg_Err( p_demux, "avi module discarded (invalid file)" );
 288         free(p_sys);
 289         return VLC_EGENERIC;
 290     }
 291
 292     if( AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF ) > 1 )
 293     {
 294         unsigned int i_count =
 295             AVI_ChunkCount( &p_sys->ck_root, AVIFOURCC_RIFF );
 296
 297         msg_Warn( p_demux, "multiple riff -> OpenDML ?" );
 298         for( i = 1; i < i_count; i++ )
 299         {
 300             avi_chunk_list_t *p_sysx;
 301
 302             p_sysx = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, i );
 303             if( p_sysx->i_type == AVIFOURCC_AVIX )
 304             {
 305                 msg_Warn( p_demux, "detected OpenDML file" );
 306                 p_sys->b_odml = true;
 307                 break;
 308             }
 309         }
 310     }
 311
 312     p_riff  = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0 );
 313     p_hdrl  = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
 314     p_movi  = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0 );
 315
 316     if( !p_hdrl || !p_movi )
 317     {
 318         msg_Err( p_demux, "avi module discarded (invalid file)" );
 319         goto error;
 320     }
 321
 322     if( !( p_avih = AVI_ChunkFind( p_hdrl, AVIFOURCC_avih, 0 ) ) )
 323     {
 324         msg_Err( p_demux, "cannot find avih chunk" );
 325         goto error;
 326     }
 327     i_track = AVI_ChunkCount( p_hdrl, AVIFOURCC_strl );
 328     if( p_avih->i_streams != i_track )
 329     {
 330         msg_Warn( p_demux,
 331                   "found %d stream but %d are declared",
 332                   i_track, p_avih->i_streams );
 333     }
 334     if( i_track == 0 )
 335     {
 336         msg_Err( p_demux, "no stream defined!" );
 337         goto error;
 338     }
 339
 340     /* print information on streams */
 341     msg_Dbg( p_demux, "AVIH: %d stream, flags %s%s%s%s ",
 342              i_track,
 343              p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 344              p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 345              p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 346              p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 347     if( ( p_sys->meta = vlc_meta_New() ) )
 348     {
 349         char buffer[200];
 350         snprintf( buffer, sizeof(buffer), "%s%s%s%s",
 351                   p_avih->i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
 352                   p_avih->i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
 353                   p_avih->i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
 354                   p_avih->i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"" );
 355         vlc_meta_SetSetting( p_sys->meta, buffer );
 356     }
 357
 358     /* now read info on each stream and create ES */
 359     for( i = 0 ; i < i_track; i++ )
 360     {
 361         avi_track_t           *tk     = malloc( sizeof( avi_track_t ) );
 362         if( !tk )
 363             goto error;
 364
 365         avi_chunk_list_t      *p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 366         avi_chunk_strh_t      *p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 367         avi_chunk_STRING_t    *p_strn = AVI_ChunkFind( p_strl, AVIFOURCC_strn, 0 );
 368         avi_chunk_strf_auds_t *p_auds = NULL;
 369         avi_chunk_strf_vids_t *p_vids = NULL;
 370         es_format_t fmt;
 371
 372         memset( tk, 0, sizeof(*tk) );
 373         tk->b_eof = false;
 374         tk->b_activated = true;
 375
 376         p_vids = (avi_chunk_strf_vids_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 377         p_auds = (avi_chunk_strf_auds_t*)AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 378
 379         if( p_strl == NULL || p_strh == NULL || p_auds == NULL || p_vids == NULL )
 380         {
 381             msg_Warn( p_demux, "stream[%d] incomplete", i );
 382             free( tk );
 383             continue;
 384         }
 385
 386         tk->i_rate  = p_strh->i_rate;
 387         tk->i_scale = p_strh->i_scale;
 388         tk->i_samplesize = p_strh->i_samplesize;
 389         msg_Dbg( p_demux, "stream[%d] rate:%d scale:%d samplesize:%d",
 390                  i, tk->i_rate, tk->i_scale, tk->i_samplesize );
 391
 392         switch( p_strh->i_type )
 393         {
 394             case( AVIFOURCC_auds ):
 395                 tk->i_cat   = AUDIO_ES;
 396                 tk->i_codec = AVI_FourccGetCodec( AUDIO_ES,
 397                                                   p_auds->p_wf->wFormatTag );
 398
 399                 tk->i_blocksize = p_auds->p_wf->nBlockAlign;
 400                 if( tk->i_blocksize == 0 )
 401                 {
 402                     if( p_auds->p_wf->wFormatTag == 1 )
 403                         tk->i_blocksize = p_auds->p_wf->nChannels * (p_auds->p_wf->wBitsPerSample/8);
 404                     else
 405                         tk->i_blocksize = 1;
 406                 }
 407                 else if( tk->i_samplesize != 0 && tk->i_samplesize != tk->i_blocksize )
 408                 {
 409                     msg_Warn( p_demux, "track[%d] samplesize=%d and blocksize=%d are not equal."
 410                                        "Using blocksize as a workaround.",
 411                                        i, tk->i_samplesize, tk->i_blocksize );
 412                     tk->i_samplesize = tk->i_blocksize;
 413                 }
 414
 415                 if( tk->i_codec == VLC_CODEC_VORBIS )
 416                 {
 417                     tk->i_blocksize = 0; /* fix vorbis VBR decoding */
 418                 }
 419
 420                 es_format_Init( &fmt, AUDIO_ES, tk->i_codec );
 421
 422                 fmt.audio.i_channels        = p_auds->p_wf->nChannels;
 423                 fmt.audio.i_rate            = p_auds->p_wf->nSamplesPerSec;
 424                 fmt.i_bitrate               = p_auds->p_wf->nAvgBytesPerSec*8;
 425                 fmt.audio.i_blockalign      = p_auds->p_wf->nBlockAlign;
 426                 fmt.audio.i_bitspersample   = p_auds->p_wf->wBitsPerSample;
 427                 fmt.b_packetized            = !tk->i_blocksize;
 428
 429                 msg_Dbg( p_demux,
 430                     "stream[%d] audio(0x%x) %d channels %dHz %dbits",
 431                     i, p_auds->p_wf->wFormatTag, p_auds->p_wf->nChannels,
 432                     p_auds->p_wf->nSamplesPerSec,
 433                     p_auds->p_wf->wBitsPerSample );
 434
 435                 fmt.i_extra = __MIN( p_auds->p_wf->cbSize,
 436                     p_auds->i_chunk_size - sizeof(WAVEFORMATEX) );
 437                 fmt.p_extra = malloc( fmt.i_extra );
 438                 if( !fmt.p_extra ) goto error;
 439                 memcpy( fmt.p_extra, &p_auds->p_wf[1], fmt.i_extra );
 440
 441                 /* Rewrite the vorbis headers from Xiph-like format
 442                  * to VLC internal format
 443                  *
 444                  * Xiph format:
 445                  *  - 1st byte == N, is the number of packets - 1
 446                  *  - Following bytes are the size of the N first packets:
 447                  *      while( *p == 0xFF ) { size += 0xFF; p++ } size += *p;
 448                  *      (the size of the last packet is the size of remaining
 449                  *      data in the buffer)
 450                  *  - Finally, all the packets concatenated
 451                  *
 452                  * VLC format:
 453                  *  - Size of the packet on 16 bits (big endian) FIXME: should be 32 bits to be safe
 454                  *  - The packet itself
 455                  *  - Size of the next packet, and so on ...
 456                  */
 457
 458                 if( tk->i_codec == VLC_CODEC_VORBIS )
 459                 {
 460                     uint8_t *p_extra = fmt.p_extra;
 461                     size_t i_extra = fmt.i_extra;
 462
 463                     if( i_extra <= 1 ) break;
 464                     if( *p_extra++ != 2 ) break; /* 3 packets - 1 = 2 */
 465                     i_extra--;
 466
 467                     size_t i_identifier_len = 0;
 468                     while( *p_extra == 0xFF )
 469                     {
 470                         i_identifier_len += 0xFF;
 471                         p_extra++;
 472                         if( --i_extra <= 1 ) break;
 473                     }
 474                     i_identifier_len += *p_extra++;
 475                     if( i_identifier_len > --i_extra ) break;
 476
 477                     size_t i_comment_len = 0;
 478                     while( *p_extra == 0xFF )
 479                     {
 480                         i_comment_len += 0xFF;
 481                         p_extra++;
 482                         if( --i_extra <= 1 ) break;
 483                     }
 484                     i_comment_len += *p_extra++;
 485                     if( i_comment_len > --i_extra ) break;
 486                     size_t i_cookbook_len = i_extra;
 487
 488                     size_t i_headers_size = 3  * 2 + i_identifier_len +
 489                                             i_comment_len + i_cookbook_len;
 490                     uint8_t *p_out = malloc( i_headers_size );
 491                     if( !p_out ) goto error;
 492                     free( fmt.p_extra );
 493                     fmt.p_extra = p_out;
 494                     fmt.i_extra = i_headers_size;
 495                     #define copy_packet( len ) \
 496                         *p_out++ = len >> 8; \
 497                         *p_out++ = len & 0xFF; \
 498                         memcpy( p_out, p_extra, len ); \
 499                         p_out += len; \
 500                         p_extra += len;
 501                     copy_packet( i_identifier_len );
 502                     copy_packet( i_comment_len );
 503                     copy_packet( i_cookbook_len );
 504                     #undef copy_packet
 505                     break;
 506                 }
 507                 break;
 508
 509             case( AVIFOURCC_vids ):
 510                 tk->i_cat   = VIDEO_ES;
 511                 tk->i_codec = AVI_FourccGetCodec( VIDEO_ES,
 512                                                   p_vids->p_bih->biCompression );
 513                 if( p_vids->p_bih->biCompression == VLC_FOURCC( 'D', 'X', 'S', 'B' ) )
 514                 {
 515                    msg_Dbg( p_demux, "stream[%d] subtitles", i );
 516                    es_format_Init( &fmt, SPU_ES, p_vids->p_bih->biCompression );
 517                    break;
 518                 }
 519                 else if( p_vids->p_bih->biCompression == 0x00 )
 520                 {
 521                     switch( p_vids->p_bih->biBitCount )
 522                     {
 523                         case 32:
 524                             tk->i_codec = VLC_CODEC_RGB32;
 525                             break;
 526                         case 24:
 527                             tk->i_codec = VLC_CODEC_RGB24;
 528                             break;
 529                         case 16: /* Yes it is RV15 */
 530                         case 15:
 531                             tk->i_codec = VLC_CODEC_RGB15;
 532                             break;
 533                         case 9: /* <- TODO check that */
 534                             tk->i_codec = VLC_CODEC_I410;
 535                             break;
 536                         case 8: /* <- TODO check that */
 537                             tk->i_codec = VLC_CODEC_GREY;
 538                             break;
 539                     }
 540                     es_format_Init( &fmt, VIDEO_ES, tk->i_codec );
 541
 542                     switch( tk->i_codec )
 543                     {
 544                     case VLC_CODEC_RGB24:
 545                     case VLC_CODEC_RGB32:
 546                         fmt.video.i_rmask = 0x00ff0000;
 547                         fmt.video.i_gmask = 0x0000ff00;
 548                         fmt.video.i_bmask = 0x000000ff;
 549                         break;
 550                     case VLC_CODEC_RGB15:
 551                         fmt.video.i_rmask = 0x7c00;
 552                         fmt.video.i_gmask = 0x03e0;
 553                         fmt.video.i_bmask = 0x001f;
 554                         break;
 555                     default:
 556                         break;
 557                     }
 558                 }
 559                 else
 560                 {
 561                     es_format_Init( &fmt, VIDEO_ES, p_vids->p_bih->biCompression );
 562                     if( tk->i_codec == VLC_CODEC_MP4V &&
 563                         !strncasecmp( (char*)&p_strh->i_handler, "XVID", 4 ) )
 564                     {
 565                         fmt.i_codec           =
 566                         fmt.i_original_fourcc = VLC_FOURCC( 'X', 'V', 'I', 'D' );
 567                     }
 568                 }
 569                 tk->i_samplesize = 0;
 570                 fmt.video.i_width  = p_vids->p_bih->biWidth;
 571                 fmt.video.i_height = p_vids->p_bih->biHeight;
 572                 fmt.video.i_bits_per_pixel = p_vids->p_bih->biBitCount;
 573                 fmt.video.i_frame_rate = tk->i_rate;
 574                 fmt.video.i_frame_rate_base = tk->i_scale;
 575                 fmt.i_extra =
 576                     __MIN( p_vids->p_bih->biSize - sizeof( BITMAPINFOHEADER ),
 577                            p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER) );
 578                 fmt.p_extra = &p_vids->p_bih[1];
 579                 msg_Dbg( p_demux, "stream[%d] video(%4.4s) %"PRIu32"x%"PRIu32" %dbpp %ffps",
 580                          i, (char*)&p_vids->p_bih->biCompression,
 581                          (uint32_t)p_vids->p_bih->biWidth,
 582                          (uint32_t)p_vids->p_bih->biHeight,
 583                          p_vids->p_bih->biBitCount,
 584                          (float)tk->i_rate/(float)tk->i_scale );
 585
 586                 if( p_vids->p_bih->biCompression == 0x00 )
 587                 {
 588                     /* RGB DIB are coded from bottom to top */
 589                     fmt.video.i_height =
 590                         (unsigned int)(-(int)p_vids->p_bih->biHeight);
 591                 }
 592
 593                 /* Extract palette from extradata if bpp <= 8
 594                  * (assumes that extradata contains only palette but appears
 595                  *  to be true for all palettized codecs we support) */
 596                 if( fmt.video.i_bits_per_pixel > 0 && fmt.video.i_bits_per_pixel <= 8 )
 597                 {
 598                     /* The palette is not always included in biSize */
 599                     fmt.i_extra = p_vids->i_chunk_size - sizeof(BITMAPINFOHEADER);
 600                     if( fmt.i_extra > 0 )
 601                     {
 602                         const uint8_t *p_pal = fmt.p_extra;
 603
 604                         fmt.video.p_palette = calloc( 1, sizeof(video_palette_t) );
 605                         fmt.video.p_palette->i_entries = __MIN(fmt.i_extra/4, 256);
 606
 607                         for( int i = 0; i < fmt.video.p_palette->i_entries; i++ )
 608                         {
 609                             for( int j = 0; j < 4; j++ )
 610                                 fmt.video.p_palette->palette[i][j] = p_pal[4*i+j];
 611                         }
 612                     }
 613                 }
 614                 break;
 615
 616             case( AVIFOURCC_txts):
 617                 msg_Dbg( p_demux, "stream[%d] subtitle attachment", i );
 618                 AVI_ExtractSubtitle( p_demux, p_strl, p_strn );
 619                 free( tk );
 620                 continue;
 621
 622             case( AVIFOURCC_iavs):
 623             case( AVIFOURCC_ivas):
 624                 p_sys->b_muxed = true;
 625                 msg_Dbg( p_demux, "stream[%d] iavs with handler %4.4s", i, (char *)&p_strh->i_handler );
 626                 if( p_strh->i_handler == FOURCC_dvsd ||
 627                     p_strh->i_handler == FOURCC_dvhd ||
 628                     p_strh->i_handler == FOURCC_dvsl ||
 629                     p_strh->i_handler == FOURCC_dv25 ||
 630                     p_strh->i_handler == FOURCC_dv50 )
 631                 {
 632                     tk->p_out_muxed = stream_DemuxNew( p_demux, (char *)"rawdv", p_demux->out );
 633                     if( !tk->p_out_muxed )
 634                         msg_Err( p_demux, "could not load the DV parser" );
 635                     else break;
 636                 }
 637                 free( tk );
 638                 continue;
 639
 640             case( AVIFOURCC_mids):
 641                 msg_Dbg( p_demux, "stream[%d] midi is UNSUPPORTED", i );
 642
 643             default:
 644                 msg_Warn( p_demux, "stream[%d] unknown type %4.4s", i, (char *)&p_strh->i_type );
 645                 free( tk );
 646                 continue;
 647         }
 648         if( p_strn )
 649             fmt.psz_description = FromLatin1( p_strn->p_str );
 650         if( tk->p_out_muxed == NULL )
 651             tk->p_es = es_out_Add( p_demux->out, &fmt );
 652         TAB_APPEND( p_sys->i_track, p_sys->track, tk );
 653         es_format_Clean( &fmt );
 654     }
 655
 656     if( p_sys->i_track <= 0 )
 657     {
 658         msg_Err( p_demux, "no valid track" );
 659         goto error;
 660     }
 661
 662     i_do_index = var_InheritInteger( p_demux, "avi-index" );
 663     if( i_do_index == 1 ) /* Always fix */
 664     {
 665 aviindex:
 666         if( p_sys->b_seekable )
 667         {
 668             AVI_IndexCreate( p_demux );
 669         }
 670         else
 671         {
 672             msg_Warn( p_demux, "cannot create index (unseekable stream)" );
 673             AVI_IndexLoad( p_demux );
 674         }
 675     }
 676     else
 677     {
 678         AVI_IndexLoad( p_demux );
 679     }
 680
 681     /* *** movie length in sec *** */
 682     p_sys->i_length = AVI_MovieGetLength( p_demux );
 683
 684     /* Check the index completeness */
 685     unsigned int i_idx_totalframes = 0;
 686     for( unsigned int i = 0; i < p_sys->i_track; i++ )
 687     {
 688         const avi_track_t *tk = p_sys->track[i];
 689         if( tk->i_cat == VIDEO_ES && tk->p_index )
 690             i_idx_totalframes = __MAX(i_idx_totalframes, tk->i_idxnb);
 691             continue;
 692     }
 693     if( i_idx_totalframes != p_avih->i_totalframes &&
 694         p_sys->i_length < (mtime_t)p_avih->i_totalframes *
 695                           (mtime_t)p_avih->i_microsecperframe /
 696                           (mtime_t)1000000 )
 697     {
 698         if( !vlc_object_alive( p_demux) )
 699             goto error;
 700
 701         msg_Warn( p_demux, "broken or missing index, 'seek' will be "
 702                            "approximative or will exhibit strange behavior" );
 703         if( i_do_index == 0 && !b_index )
 704         {
 705             if( !p_sys->b_seekable ) {
 706                 b_index = true;
 707                 goto aviindex;
 708             }
 709             switch( dialog_Question( p_demux, _("AVI Index") ,
 710                _( "This AVI file is broken. Seeking will not work correctly.\n"
 711                   "Do you want to try to fix it?\n\n"
 712                   "This might take a long time." ),
 713                   _( "Repair" ), _( "Don't repair" ), _( "Cancel") ) )
 714             {
 715                 case 1:
 716                     b_index = true;
 717                     msg_Dbg( p_demux, "Fixing AVI index" );
 718                     goto aviindex;
 719                 case 3:
 720                     /* Kill input */
 721                     vlc_object_kill( p_demux->p_parent );
 722                     goto error;
 723             }
 724         }
 725     }
 726
 727     /* fix some BeOS MediaKit generated file */
 728     for( i = 0 ; i < p_sys->i_track; i++ )
 729     {
 730         avi_track_t         *tk = p_sys->track[i];
 731         avi_chunk_list_t    *p_strl;
 732         avi_chunk_strh_t    *p_strh;
 733         avi_chunk_strf_auds_t    *p_auds;
 734
 735         if( tk->i_cat != AUDIO_ES )
 736         {
 737             continue;
 738         }
 739         if( tk->i_idxnb < 1 ||
 740             tk->i_scale != 1 ||
 741             tk->i_samplesize != 0 )
 742         {
 743             continue;
 744         }
 745         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i );
 746         p_strh = AVI_ChunkFind( p_strl, AVIFOURCC_strh, 0 );
 747         p_auds = AVI_ChunkFind( p_strl, AVIFOURCC_strf, 0 );
 748
 749         if( p_auds->p_wf->wFormatTag != WAVE_FORMAT_PCM &&
 750             (unsigned int)tk->i_rate == p_auds->p_wf->nSamplesPerSec )
 751         {
 752             int64_t i_track_length =
 753                 tk->p_index[tk->i_idxnb-1].i_length +
 754                 tk->p_index[tk->i_idxnb-1].i_lengthtotal;
 755             mtime_t i_length = (mtime_t)p_avih->i_totalframes *
 756                                (mtime_t)p_avih->i_microsecperframe;
 757
 758             if( i_length == 0 )
 759             {
 760                 msg_Warn( p_demux, "track[%d] cannot be fixed (BeOS MediaKit generated)", i );
 761                 continue;
 762             }
 763             tk->i_samplesize = 1;
 764             tk->i_rate       = i_track_length  * (int64_t)1000000/ i_length;
 765             msg_Warn( p_demux, "track[%d] fixed with rate=%d scale=%d (BeOS MediaKit generated)", i, tk->i_rate, tk->i_scale );
 766         }
 767     }
 768
 769     if( p_sys->b_seekable )
 770     {
 771         /* we have read all chunk so go back to movi */
 772         stream_Seek( p_demux->s, p_movi->i_chunk_pos );
 773     }
 774     /* Skip movi header */
 775     stream_Read( p_demux->s, NULL, 12 );
 776
 777     p_sys->i_movi_begin = p_movi->i_chunk_pos;
 778     return VLC_SUCCESS;
 779
 780 error:
 781     for( unsigned i = 0; i < p_sys->i_attachment; i++)
 782         vlc_input_attachment_Delete(p_sys->attachment[i]);
 783     free(p_sys->attachment);
 784
 785     if( p_sys->meta )
 786         vlc_meta_Delete( p_sys->meta );
 787
 788     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 789     free( p_sys );
 790     return vlc_object_alive( p_demux ) ? VLC_EGENERIC : VLC_ETIMEOUT;
 791 }
 792
 793 /*****************************************************************************
 794  * Close: frees unused data
 795  *****************************************************************************/
 796 static void Close ( vlc_object_t * p_this )
 797 {
 798     demux_t *    p_demux = (demux_t *)p_this;
 799     unsigned int i;
 800     demux_sys_t *p_sys = p_demux->p_sys  ;
 801
 802     for( i = 0; i < p_sys->i_track; i++ )
 803     {
 804         if( p_sys->track[i] )
 805         {
 806             if( p_sys->track[i]->p_out_muxed )
 807                 stream_Delete( p_sys->track[i]->p_out_muxed );
 808             free( p_sys->track[i]->p_index );
 809             free( p_sys->track[i] );
 810         }
 811     }
 812     free( p_sys->track );
 813     AVI_ChunkFreeRoot( p_demux->s, &p_sys->ck_root );
 814     vlc_meta_Delete( p_sys->meta );
 815     for( unsigned i = 0; i < p_sys->i_attachment; i++)
 816         vlc_input_attachment_Delete(p_sys->attachment[i]);
 817     free(p_sys->attachment);
 818
 819     free( p_sys );
 820 }
 821
 822 /*****************************************************************************
 823  * Demux_Seekable: reads and demuxes data packets for stream seekable
 824  *****************************************************************************
 825  * AVIDemux: reads and demuxes data packets
 826  *****************************************************************************
 827  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 828  *****************************************************************************/
 829 typedef struct
 830 {
 831     bool b_ok;
 832
 833     int i_toread;
 834
 835     off_t i_posf; /* where we will read :
 836                    if i_idxposb == 0 : begining of chunk (+8 to acces data)
 837                    else : point on data directly */
 838 } avi_track_toread_t;
 839
 840 static int Demux_Seekable( demux_t *p_demux )
 841 {
 842     demux_sys_t *p_sys = p_demux->p_sys;
 843
 844     unsigned int i_track_count = 0;
 845     unsigned int i_track;
 846     /* cannot be more than 100 stream (dcXX or wbXX) */
 847     avi_track_toread_t toread[100];
 848
 849
 850     /* detect new selected/unselected streams */
 851     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 852     {
 853         avi_track_t *tk = p_sys->track[i_track];
 854         bool  b;
 855
 856         if( p_sys->b_muxed && tk->p_out_muxed )
 857         {
 858             i_track_count++;
 859             tk->b_activated = true;
 860             continue;
 861         }
 862
 863         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 864         if( b && !tk->b_activated )
 865         {
 866             if( p_sys->b_seekable)
 867             {
 868                 AVI_TrackSeek( p_demux, i_track, p_sys->i_time );
 869             }
 870             tk->b_activated = true;
 871         }
 872         else if( !b && tk->b_activated )
 873         {
 874             tk->b_activated = false;
 875         }
 876         if( b )
 877         {
 878             i_track_count++;
 879         }
 880     }
 881
 882     if( i_track_count <= 0 )
 883     {
 884         int64_t i_length = p_sys->i_length * (mtime_t)1000000;
 885
 886         p_sys->i_time += 25*1000;  /* read 25ms */
 887         if( i_length > 0 )
 888         {
 889             if( p_sys->i_time >= i_length )
 890                 return 0;
 891             return 1;
 892         }
 893         msg_Warn( p_demux, "no track selected, exiting..." );
 894         return 0;
 895     }
 896
 897     /* wait for the good time */
 898     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
 899     p_sys->i_time += 25*1000;  /* read 25ms */
 900
 901     /* init toread */
 902     for( i_track = 0; i_track < p_sys->i_track; i_track++ )
 903     {
 904         avi_track_t *tk = p_sys->track[i_track];
 905         mtime_t i_dpts;
 906
 907         toread[i_track].b_ok = tk->b_activated && !tk->b_eof;
 908         if( tk->i_idxposc < tk->i_idxnb )
 909         {
 910             toread[i_track].i_posf = tk->p_index[tk->i_idxposc].i_pos;
 911            if( tk->i_idxposb > 0 )
 912            {
 913                 toread[i_track].i_posf += 8 + tk->i_idxposb;
 914            }
 915         }
 916         else
 917         {
 918             toread[i_track].i_posf = -1;
 919         }
 920
 921         i_dpts = p_sys->i_time - AVI_GetPTS( tk  );
 922
 923         if( tk->i_samplesize )
 924         {
 925             toread[i_track].i_toread = AVI_PTSToByte( tk, __ABS( i_dpts ) );
 926         }
 927         else
 928         {
 929             toread[i_track].i_toread = AVI_PTSToChunk( tk, __ABS( i_dpts ) );
 930         }
 931
 932         if( i_dpts < 0 )
 933         {
 934             toread[i_track].i_toread *= -1;
 935         }
 936     }
 937
 938     for( ;; )
 939     {
 940         avi_track_t     *tk;
 941         bool       b_done;
 942         block_t         *p_frame;
 943         off_t i_pos;
 944         unsigned int i;
 945         size_t i_size;
 946
 947         /* search for first chunk to be read */
 948         for( i = 0, b_done = true, i_pos = -1; i < p_sys->i_track; i++ )
 949         {
 950             if( !toread[i].b_ok ||
 951                 AVI_GetDPTS( p_sys->track[i],
 952                              toread[i].i_toread ) <= -25 * 1000 )
 953             {
 954                 continue;
 955             }
 956
 957             if( toread[i].i_toread > 0 )
 958             {
 959                 b_done = false; /* not yet finished */
 960             }
 961             if( toread[i].i_posf > 0 )
 962             {
 963                 if( i_pos == -1 || i_pos > toread[i].i_posf )
 964                 {
 965                     i_track = i;
 966                     i_pos = toread[i].i_posf;
 967                 }
 968             }
 969         }
 970
 971         if( b_done )
 972         {
 973             for( i = 0; i < p_sys->i_track; i++ )
 974             {
 975                 if( toread[i].b_ok )
 976                     return 1;
 977             }
 978             msg_Warn( p_demux, "all tracks have failed, exiting..." );
 979             return 0;
 980         }
 981
 982         if( i_pos == -1 )
 983         {
 984             int i_loop_count = 0;
 985
 986             /* no valid index, we will parse directly the stream
 987              * in case we fail we will disable all finished stream */
 988             if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
 989             {
 990                 stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
 991                 if( AVI_PacketNext( p_demux ) )
 992                 {
 993                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
 994                 }
 995             }
 996             else
 997             {
 998                 stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
 999             }
1000
1001             for( ;; )
1002             {
1003                 avi_packet_t avi_pk;
1004
1005                 if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1006                 {
1007                     msg_Warn( p_demux,
1008                              "cannot get packet header, track disabled" );
1009                     return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
1010                 }
1011                 if( avi_pk.i_stream >= p_sys->i_track ||
1012                     ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1013                 {
1014                     if( AVI_PacketNext( p_demux ) )
1015                     {
1016                         msg_Warn( p_demux,
1017                                   "cannot skip packet, track disabled" );
1018                         return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
1019                     }
1020
1021                     /* Prevents from eating all the CPU with broken files.
1022                      * This value should be low enough so that it doesn't
1023                      * affect the reading speed too much. */
1024                     if( !(++i_loop_count % 1024) )
1025                     {
1026                         if( !vlc_object_alive (p_demux) ) return -1;
1027                         msleep( 10000 );
1028
1029                         if( !(i_loop_count % (1024 * 10)) )
1030                             msg_Warn( p_demux,
1031                                       "don't seem to find any data..." );
1032                     }
1033                     continue;
1034                 }
1035                 else
1036                 {
1037                     /* add this chunk to the index */
1038                     avi_entry_t index;
1039
1040                     index.i_id = avi_pk.i_fourcc;
1041                     index.i_flags =
1042                        AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
1043                                       avi_pk.i_peek);
1044                     index.i_pos = avi_pk.i_pos;
1045                     index.i_length = avi_pk.i_size;
1046                     AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
1047
1048                     i_track = avi_pk.i_stream;
1049                     tk = p_sys->track[i_track];
1050                     /* do we will read this data ? */
1051                     if( AVI_GetDPTS( tk, toread[i_track].i_toread ) > -25*1000 )
1052                     {
1053                         break;
1054                     }
1055                     else
1056                     {
1057                         if( AVI_PacketNext( p_demux ) )
1058                         {
1059                             msg_Warn( p_demux,
1060                                       "cannot skip packet, track disabled" );
1061                             return( AVI_TrackStopFinishedStreams( p_demux ) ? 0 : 1 );
1062                         }
1063                     }
1064                 }
1065             }
1066
1067         }
1068         else
1069         {
1070             stream_Seek( p_demux->s, i_pos );
1071         }
1072
1073         /* Set the track to use */
1074         tk = p_sys->track[i_track];
1075
1076         /* read thoses data */
1077         if( tk->i_samplesize )
1078         {
1079             unsigned int i_toread;
1080
1081             if( ( i_toread = toread[i_track].i_toread ) <= 0 )
1082             {
1083                 if( tk->i_samplesize > 1 )
1084                 {
1085                     i_toread = tk->i_samplesize;
1086                 }
1087                 else
1088                 {
1089                     i_toread = AVI_PTSToByte( tk, 20 * 1000 );
1090                     i_toread = __MAX( i_toread, 100 );
1091                 }
1092             }
1093             i_size = __MIN( tk->p_index[tk->i_idxposc].i_length -
1094                                 tk->i_idxposb,
1095                             i_toread );
1096         }
1097         else
1098         {
1099             i_size = tk->p_index[tk->i_idxposc].i_length;
1100         }
1101
1102         if( tk->i_idxposb == 0 )
1103         {
1104             i_size += 8; /* need to read and skip header */
1105         }
1106
1107         if( ( p_frame = stream_Block( p_demux->s, __EVEN( i_size ) ) )==NULL )
1108         {
1109             msg_Warn( p_demux, "failed reading data" );
1110             tk->b_eof = false;
1111             toread[i_track].b_ok = false;
1112             continue;
1113         }
1114         if( i_size % 2 )    /* read was padded on word boundary */
1115         {
1116             p_frame->i_buffer--;
1117         }
1118         /* skip header */
1119         if( tk->i_idxposb == 0 )
1120         {
1121             p_frame->p_buffer += 8;
1122             p_frame->i_buffer -= 8;
1123         }
1124         p_frame->i_pts = AVI_GetPTS( tk ) + 1;
1125         if( tk->p_index[tk->i_idxposc].i_flags&AVIIF_KEYFRAME )
1126         {
1127             p_frame->i_flags = BLOCK_FLAG_TYPE_I;
1128         }
1129         else
1130         {
1131             p_frame->i_flags = BLOCK_FLAG_TYPE_PB;
1132         }
1133
1134         /* read data */
1135         if( tk->i_samplesize )
1136         {
1137             if( tk->i_idxposb == 0 )
1138             {
1139                 i_size -= 8;
1140             }
1141             toread[i_track].i_toread -= i_size;
1142             tk->i_idxposb += i_size;
1143             if( tk->i_idxposb >=
1144                     tk->p_index[tk->i_idxposc].i_length )
1145             {
1146                 tk->i_idxposb = 0;
1147                 tk->i_idxposc++;
1148             }
1149         }
1150         else
1151         {
1152             int i_length = tk->p_index[tk->i_idxposc].i_length;
1153
1154             tk->i_idxposc++;
1155             if( tk->i_cat == AUDIO_ES )
1156             {
1157                 tk->i_blockno += tk->i_blocksize > 0 ? ( i_length + tk->i_blocksize - 1 ) / tk->i_blocksize : 1;
1158             }
1159             toread[i_track].i_toread--;
1160         }
1161
1162         if( tk->i_idxposc < tk->i_idxnb)
1163         {
1164             toread[i_track].i_posf =
1165                 tk->p_index[tk->i_idxposc].i_pos;
1166             if( tk->i_idxposb > 0 )
1167             {
1168                 toread[i_track].i_posf += 8 + tk->i_idxposb;
1169             }
1170
1171         }
1172         else
1173         {
1174             toread[i_track].i_posf = -1;
1175         }
1176
1177         if( tk->i_cat != VIDEO_ES )
1178             p_frame->i_dts = p_frame->i_pts;
1179         else
1180         {
1181             p_frame->i_dts = p_frame->i_pts;
1182             p_frame->i_pts = VLC_TS_INVALID;
1183         }
1184
1185         //p_pes->i_rate = p_demux->stream.control.i_rate;
1186         if( tk->p_out_muxed )
1187             stream_DemuxSend( tk->p_out_muxed, p_frame );
1188         else
1189             es_out_Send( p_demux->out, tk->p_es, p_frame );
1190     }
1191 }
1192
1193
1194 /*****************************************************************************
1195  * Demux_UnSeekable: reads and demuxes data packets for unseekable file
1196  *****************************************************************************
1197  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
1198  *****************************************************************************/
1199 static int Demux_UnSeekable( demux_t *p_demux )
1200 {
1201     demux_sys_t     *p_sys = p_demux->p_sys;
1202     avi_track_t *p_stream_master = NULL;
1203     unsigned int i_stream;
1204     unsigned int i_packet;
1205
1206     if( p_sys->b_muxed )
1207     {
1208         msg_Err( p_demux, "Can not yet process muxed avi substreams without seeking" );
1209         return VLC_EGENERIC;
1210     }
1211
1212     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_time + 1 );
1213
1214     /* *** find master stream for data packet skipping algo *** */
1215     /* *** -> first video, if any, or first audio ES *** */
1216     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1217     {
1218         avi_track_t *tk = p_sys->track[i_stream];
1219         bool  b;
1220
1221         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
1222
1223         if( b && tk->i_cat == VIDEO_ES )
1224         {
1225             p_stream_master = tk;
1226         }
1227         else if( b )
1228         {
1229             p_stream_master = tk;
1230         }
1231     }
1232
1233     if( !p_stream_master )
1234     {
1235         msg_Warn( p_demux, "no more stream selected" );
1236         return( 0 );
1237     }
1238
1239     p_sys->i_time = AVI_GetPTS( p_stream_master );
1240
1241     for( i_packet = 0; i_packet < 10; i_packet++)
1242     {
1243 #define p_stream    p_sys->track[avi_pk.i_stream]
1244
1245         avi_packet_t    avi_pk;
1246
1247         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1248         {
1249             return( 0 );
1250         }
1251
1252         if( avi_pk.i_stream >= p_sys->i_track ||
1253             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1254         {
1255             /* we haven't found an audio or video packet:
1256              *  - we have seek, found first next packet
1257              *  - others packets could be found, skip them
1258              */
1259             switch( avi_pk.i_fourcc )
1260             {
1261                 case AVIFOURCC_JUNK:
1262                 case AVIFOURCC_LIST:
1263                 case AVIFOURCC_RIFF:
1264                     return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1265                 case AVIFOURCC_idx1:
1266                     if( p_sys->b_odml )
1267                     {
1268                         return( !AVI_PacketNext( p_demux ) ? 1 : 0 );
1269                     }
1270                     return( 0 );    /* eof */
1271                 default:
1272                     msg_Warn( p_demux,
1273                               "seems to have lost position, resync" );
1274                     if( AVI_PacketSearch( p_demux ) )
1275                     {
1276                         msg_Err( p_demux, "resync failed" );
1277                         return( -1 );
1278                     }
1279             }
1280         }
1281         else
1282         {
1283             /* check for time */
1284             if( __ABS( AVI_GetPTS( p_stream ) -
1285                         AVI_GetPTS( p_stream_master ) )< 600*1000 )
1286             {
1287                 /* load it and send to decoder */
1288                 block_t *p_frame;
1289                 if( AVI_PacketRead( p_demux, &avi_pk, &p_frame ) || p_frame == NULL )
1290                 {
1291                     return( -1 );
1292                 }
1293                 p_frame->i_pts = AVI_GetPTS( p_stream ) + 1;
1294
1295                 if( avi_pk.i_cat != VIDEO_ES )
1296                     p_frame->i_dts = p_frame->i_pts;
1297                 else
1298                 {
1299                     p_frame->i_dts = p_frame->i_pts;
1300                     p_frame->i_pts = VLC_TS_INVALID;
1301                 }
1302
1303                 //p_pes->i_rate = p_demux->stream.control.i_rate;
1304                 es_out_Send( p_demux->out, p_stream->p_es, p_frame );
1305             }
1306             else
1307             {
1308                 if( AVI_PacketNext( p_demux ) )
1309                 {
1310                     return( 0 );
1311                 }
1312             }
1313
1314             /* *** update stream time position *** */
1315             if( p_stream->i_samplesize )
1316             {
1317                 p_stream->i_idxposb += avi_pk.i_size;
1318             }
1319             else
1320             {
1321                 if( p_stream->i_cat == AUDIO_ES )
1322                 {
1323                     p_stream->i_blockno += p_stream->i_blocksize > 0 ? ( avi_pk.i_size + p_stream->i_blocksize - 1 ) / p_stream->i_blocksize : 1;
1324                 }
1325                 p_stream->i_idxposc++;
1326             }
1327
1328         }
1329 #undef p_stream
1330     }
1331
1332     return( 1 );
1333 }
1334
1335 /*****************************************************************************
1336  * Seek: goto to i_date or i_percent
1337  *****************************************************************************/
1338 static int Seek( demux_t *p_demux, mtime_t i_date, int i_percent )
1339 {
1340
1341     demux_sys_t *p_sys = p_demux->p_sys;
1342     unsigned int i_stream;
1343     msg_Dbg( p_demux, "seek requested: %"PRId64" seconds %d%%",
1344              i_date / 1000000, i_percent );
1345
1346     if( p_sys->b_seekable )
1347     {
1348         if( !p_sys->i_length )
1349         {
1350             avi_track_t *p_stream;
1351             int64_t i_pos;
1352
1353             /* use i_percent to create a true i_date */
1354             msg_Warn( p_demux, "seeking without index at %d%%"
1355                       " only works for interleaved files", i_percent );
1356             if( i_percent >= 100 )
1357             {
1358                 msg_Warn( p_demux, "cannot seek so far !" );
1359                 return VLC_EGENERIC;
1360             }
1361             i_percent = __MAX( i_percent, 0 );
1362
1363             /* try to find chunk that is at i_percent or the file */
1364             i_pos = __MAX( i_percent * stream_Size( p_demux->s ) / 100,
1365                            p_sys->i_movi_begin );
1366             /* search first selected stream (and prefer non eof ones) */
1367             for( i_stream = 0, p_stream = NULL;
1368                         i_stream < p_sys->i_track; i_stream++ )
1369             {
1370                 if( !p_stream || p_stream->b_eof )
1371                     p_stream = p_sys->track[i_stream];
1372
1373                 if( p_stream->b_activated && !p_stream->b_eof )
1374                     break;
1375             }
1376             if( !p_stream || !p_stream->b_activated )
1377             {
1378                 msg_Warn( p_demux, "cannot find any selected stream" );
1379                 return VLC_EGENERIC;
1380             }
1381
1382             /* be sure that the index exist */
1383             if( AVI_StreamChunkSet( p_demux, i_stream, 0 ) )
1384             {
1385                 msg_Warn( p_demux, "cannot seek" );
1386                 return VLC_EGENERIC;
1387             }
1388
1389             while( i_pos >= p_stream->p_index[p_stream->i_idxposc].i_pos +
1390                p_stream->p_index[p_stream->i_idxposc].i_length + 8 )
1391             {
1392                 /* search after i_idxposc */
1393                 if( AVI_StreamChunkSet( p_demux,
1394                                         i_stream, p_stream->i_idxposc + 1 ) )
1395                 {
1396                     msg_Warn( p_demux, "cannot seek" );
1397                     return VLC_EGENERIC;
1398                 }
1399             }
1400
1401             i_date = AVI_GetPTS( p_stream );
1402             /* TODO better support for i_samplesize != 0 */
1403             msg_Dbg( p_demux, "estimate date %"PRId64, i_date );
1404         }
1405
1406         /* */
1407         for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
1408         {
1409             avi_track_t *p_stream = p_sys->track[i_stream];
1410
1411             if( !p_stream->b_activated )
1412                 continue;
1413
1414             p_stream->b_eof = AVI_TrackSeek( p_demux, i_stream, i_date ) != 0;
1415         }
1416         es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_date );
1417         p_sys->i_time = i_date;
1418         msg_Dbg( p_demux, "seek: %"PRId64" seconds", p_sys->i_time /1000000 );
1419         return VLC_SUCCESS;
1420     }
1421     else
1422     {
1423         msg_Err( p_demux, "shouldn't yet be executed" );
1424         return VLC_EGENERIC;
1425     }
1426 }
1427
1428 /*****************************************************************************
1429  * Control:
1430  *****************************************************************************/
1431 static double ControlGetPosition( demux_t *p_demux )
1432 {
1433     demux_sys_t *p_sys = p_demux->p_sys;
1434
1435     if( p_sys->i_length > 0 )
1436     {
1437         return (double)p_sys->i_time / (double)( p_sys->i_length * (mtime_t)1000000 );
1438     }
1439     else if( stream_Size( p_demux->s ) > 0 )
1440     {
1441         unsigned int i;
1442         int64_t i_tmp;
1443         int64_t i64 = 0;
1444
1445         /* search the more advanced selected es */
1446         for( i = 0; i < p_sys->i_track; i++ )
1447         {
1448             avi_track_t *tk = p_sys->track[i];
1449             if( tk->b_activated && tk->i_idxposc < tk->i_idxnb )
1450             {
1451                 i_tmp = tk->p_index[tk->i_idxposc].i_pos +
1452                         tk->p_index[tk->i_idxposc].i_length + 8;
1453                 if( i_tmp > i64 )
1454                 {
1455                     i64 = i_tmp;
1456                 }
1457             }
1458         }
1459         return (double)i64 / stream_Size( p_demux->s );
1460     }
1461     return 0.0;
1462 }
1463
1464 static int Control( demux_t *p_demux, int i_query, va_list args )
1465 {
1466     demux_sys_t *p_sys = p_demux->p_sys;
1467     int i;
1468     double   f, *pf;
1469     int64_t i64, *pi64;
1470     vlc_meta_t *p_meta;
1471
1472     switch( i_query )
1473     {
1474         case DEMUX_GET_POSITION:
1475             pf = (double*)va_arg( args, double * );
1476             *pf = ControlGetPosition( p_demux );
1477             return VLC_SUCCESS;
1478         case DEMUX_SET_POSITION:
1479             f = (double)va_arg( args, double );
1480             if( p_sys->b_seekable )
1481             {
1482                 i64 = (mtime_t)(1000000.0 * p_sys->i_length * f );
1483                 return Seek( p_demux, i64, (int)(f * 100) );
1484             }
1485             else
1486             {
1487                 int64_t i_pos = stream_Size( p_demux->s ) * f;
1488                 return stream_Seek( p_demux->s, i_pos );
1489             }
1490
1491         case DEMUX_GET_TIME:
1492             pi64 = (int64_t*)va_arg( args, int64_t * );
1493             *pi64 = p_sys->i_time;
1494             return VLC_SUCCESS;
1495
1496         case DEMUX_SET_TIME:
1497         {
1498             int i_percent = 0;
1499
1500             i64 = (int64_t)va_arg( args, int64_t );
1501             if( p_sys->i_length > 0 )
1502             {
1503                 i_percent = 100 * i64 / (p_sys->i_length*1000000);
1504             }
1505             else if( p_sys->i_time > 0 )
1506             {
1507                 i_percent = (int)( 100.0 * ControlGetPosition( p_demux ) *
1508                                    (double)i64 / (double)p_sys->i_time );
1509             }
1510             return Seek( p_demux, i64, i_percent );
1511         }
1512         case DEMUX_GET_LENGTH:
1513             pi64 = (int64_t*)va_arg( args, int64_t * );
1514             *pi64 = p_sys->i_length * (mtime_t)1000000;
1515             return VLC_SUCCESS;
1516
1517         case DEMUX_GET_FPS:
1518             pf = (double*)va_arg( args, double * );
1519             *pf = 0.0;
1520             for( i = 0; i < (int)p_sys->i_track; i++ )
1521             {
1522                 avi_track_t *tk = p_sys->track[i];
1523                 if( tk->i_cat == VIDEO_ES && tk->i_scale > 0)
1524                 {
1525                     *pf = (float)tk->i_rate / (float)tk->i_scale;
1526                     break;
1527                 }
1528             }
1529             return VLC_SUCCESS;
1530
1531         case DEMUX_GET_META:
1532             p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
1533             vlc_meta_Merge( p_meta,  p_sys->meta );
1534             return VLC_SUCCESS;
1535
1536         case DEMUX_GET_ATTACHMENTS:
1537         {
1538             if( p_sys->i_attachment <= 0 )
1539                 return VLC_EGENERIC;
1540
1541             input_attachment_t ***ppp_attach = va_arg( args, input_attachment_t*** );
1542             int *pi_int = va_arg( args, int * );
1543
1544             *pi_int     = p_sys->i_attachment;
1545             *ppp_attach = calloc( p_sys->i_attachment, sizeof(*ppp_attach));
1546             for( unsigned i = 0; i < p_sys->i_attachment && *ppp_attach; i++ )
1547                 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachment[i] );
1548             return VLC_SUCCESS;
1549         }
1550
1551         default:
1552             return VLC_EGENERIC;
1553     }
1554 }
1555
1556 /*****************************************************************************
1557  * Function to convert pts to chunk or byte
1558  *****************************************************************************/
1559
1560 static mtime_t AVI_PTSToChunk( avi_track_t *tk, mtime_t i_pts )
1561 {
1562     if( !tk->i_scale )
1563         return (mtime_t)0;
1564
1565     return (mtime_t)((int64_t)i_pts *
1566                      (int64_t)tk->i_rate /
1567                      (int64_t)tk->i_scale /
1568                      (int64_t)1000000 );
1569 }
1570 static mtime_t AVI_PTSToByte( avi_track_t *tk, mtime_t i_pts )
1571 {
1572     if( !tk->i_scale || !tk->i_samplesize )
1573         return (mtime_t)0;
1574
1575     return (mtime_t)((int64_t)i_pts *
1576                      (int64_t)tk->i_rate /
1577                      (int64_t)tk->i_scale /
1578                      (int64_t)1000000 *
1579                      (int64_t)tk->i_samplesize );
1580 }
1581
1582 static mtime_t AVI_GetDPTS( avi_track_t *tk, int64_t i_count )
1583 {
1584     mtime_t i_dpts = 0;
1585
1586     if( !tk->i_rate )
1587         return i_dpts;
1588
1589     i_dpts = (mtime_t)( (int64_t)1000000 *
1590                         (int64_t)i_count *
1591                         (int64_t)tk->i_scale /
1592                         (int64_t)tk->i_rate );
1593
1594     if( tk->i_samplesize )
1595     {
1596         return i_dpts / tk->i_samplesize;
1597     }
1598     return i_dpts;
1599 }
1600
1601 static mtime_t AVI_GetPTS( avi_track_t *tk )
1602 {
1603     if( tk->i_samplesize )
1604     {
1605         int64_t i_count = 0;
1606
1607         /* we need a valid entry we will emulate one */
1608         if( tk->i_idxposc == tk->i_idxnb )
1609         {
1610             if( tk->i_idxposc )
1611             {
1612                 /* use the last entry */
1613                 i_count = tk->p_index[tk->i_idxnb - 1].i_lengthtotal
1614                             + tk->p_index[tk->i_idxnb - 1].i_length;
1615             }
1616         }
1617         else
1618         {
1619             i_count = tk->p_index[tk->i_idxposc].i_lengthtotal;
1620         }
1621         return AVI_GetDPTS( tk, i_count + tk->i_idxposb );
1622     }
1623     else
1624     {
1625         if( tk->i_cat == AUDIO_ES )
1626         {
1627             return AVI_GetDPTS( tk, tk->i_blockno );
1628         }
1629         else
1630         {
1631             return AVI_GetDPTS( tk, tk->i_idxposc );
1632         }
1633     }
1634 }
1635
1636 static int AVI_StreamChunkFind( demux_t *p_demux, unsigned int i_stream )
1637 {
1638     demux_sys_t *p_sys = p_demux->p_sys;
1639     avi_packet_t avi_pk;
1640     int i_loop_count = 0;
1641
1642     /* find first chunk of i_stream that isn't in index */
1643
1644     if( p_sys->i_movi_lastchunk_pos >= p_sys->i_movi_begin + 12 )
1645     {
1646         stream_Seek( p_demux->s, p_sys->i_movi_lastchunk_pos );
1647         if( AVI_PacketNext( p_demux ) )
1648         {
1649             return VLC_EGENERIC;
1650         }
1651     }
1652     else
1653     {
1654         stream_Seek( p_demux->s, p_sys->i_movi_begin + 12 );
1655     }
1656
1657     for( ;; )
1658     {
1659         if( !vlc_object_alive (p_demux) ) return VLC_EGENERIC;
1660
1661         if( AVI_PacketGetHeader( p_demux, &avi_pk ) )
1662         {
1663             msg_Warn( p_demux, "cannot get packet header" );
1664             return VLC_EGENERIC;
1665         }
1666         if( avi_pk.i_stream >= p_sys->i_track ||
1667             ( avi_pk.i_cat != AUDIO_ES && avi_pk.i_cat != VIDEO_ES ) )
1668         {
1669             if( AVI_PacketNext( p_demux ) )
1670             {
1671                 return VLC_EGENERIC;
1672             }
1673
1674             /* Prevents from eating all the CPU with broken files.
1675              * This value should be low enough so that it doesn't
1676              * affect the reading speed too much. */
1677             if( !(++i_loop_count % 1024) )
1678             {
1679                 if( !vlc_object_alive (p_demux) ) return VLC_EGENERIC;
1680                 msleep( 10000 );
1681
1682                 if( !(i_loop_count % (1024 * 10)) )
1683                     msg_Warn( p_demux, "don't seem to find any data..." );
1684             }
1685         }
1686         else
1687         {
1688             /* add this chunk to the index */
1689             avi_entry_t index;
1690
1691             index.i_id = avi_pk.i_fourcc;
1692             index.i_flags =
1693                AVI_GetKeyFlag(p_sys->track[avi_pk.i_stream]->i_codec,
1694                               avi_pk.i_peek);
1695             index.i_pos = avi_pk.i_pos;
1696             index.i_length = avi_pk.i_size;
1697             AVI_IndexAddEntry( p_sys, avi_pk.i_stream, &index );
1698
1699             if( avi_pk.i_stream == i_stream  )
1700             {
1701                 return VLC_SUCCESS;
1702             }
1703
1704             if( AVI_PacketNext( p_demux ) )
1705             {
1706                 return VLC_EGENERIC;
1707             }
1708         }
1709     }
1710 }
1711
1712 /* be sure that i_ck will be a valid index entry */
1713 static int AVI_StreamChunkSet( demux_t *p_demux, unsigned int i_stream,
1714                                unsigned int i_ck )
1715 {
1716     demux_sys_t *p_sys = p_demux->p_sys;
1717     avi_track_t *p_stream = p_sys->track[i_stream];
1718
1719     p_stream->i_idxposc = i_ck;
1720     p_stream->i_idxposb = 0;
1721
1722     if(  i_ck >= p_stream->i_idxnb )
1723     {
1724         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1725         do
1726         {
1727             p_stream->i_idxposc++;
1728             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1729             {
1730                 return VLC_EGENERIC;
1731             }
1732
1733         } while( p_stream->i_idxposc < i_ck );
1734     }
1735
1736     return VLC_SUCCESS;
1737 }
1738
1739 /* XXX FIXME up to now, we assume that all chunk are one after one */
1740 static int AVI_StreamBytesSet( demux_t    *p_demux,
1741                                unsigned int i_stream,
1742                                off_t   i_byte )
1743 {
1744     demux_sys_t *p_sys = p_demux->p_sys;
1745     avi_track_t *p_stream = p_sys->track[i_stream];
1746
1747     if( ( p_stream->i_idxnb > 0 )
1748         &&( i_byte < p_stream->p_index[p_stream->i_idxnb - 1].i_lengthtotal +
1749                 p_stream->p_index[p_stream->i_idxnb - 1].i_length ) )
1750     {
1751         /* index is valid to find the ck */
1752         /* uses dichototmie to be fast enougth */
1753         int i_idxposc = __MIN( p_stream->i_idxposc, p_stream->i_idxnb - 1 );
1754         int i_idxmax  = p_stream->i_idxnb;
1755         int i_idxmin  = 0;
1756         for( ;; )
1757         {
1758             if( p_stream->p_index[i_idxposc].i_lengthtotal > i_byte )
1759             {
1760                 i_idxmax  = i_idxposc ;
1761                 i_idxposc = ( i_idxmin + i_idxposc ) / 2 ;
1762             }
1763             else
1764             {
1765                 if( p_stream->p_index[i_idxposc].i_lengthtotal +
1766                         p_stream->p_index[i_idxposc].i_length <= i_byte)
1767                 {
1768                     i_idxmin  = i_idxposc ;
1769                     i_idxposc = (i_idxmax + i_idxposc ) / 2 ;
1770                 }
1771                 else
1772                 {
1773                     p_stream->i_idxposc = i_idxposc;
1774                     p_stream->i_idxposb = i_byte -
1775                             p_stream->p_index[i_idxposc].i_lengthtotal;
1776                     return VLC_SUCCESS;
1777                 }
1778             }
1779         }
1780
1781     }
1782     else
1783     {
1784         p_stream->i_idxposc = p_stream->i_idxnb - 1;
1785         p_stream->i_idxposb = 0;
1786         do
1787         {
1788             p_stream->i_idxposc++;
1789             if( AVI_StreamChunkFind( p_demux, i_stream ) )
1790             {
1791                 return VLC_EGENERIC;
1792             }
1793
1794         } while( p_stream->p_index[p_stream->i_idxposc].i_lengthtotal +
1795                     p_stream->p_index[p_stream->i_idxposc].i_length <= i_byte );
1796
1797         p_stream->i_idxposb = i_byte -
1798                        p_stream->p_index[p_stream->i_idxposc].i_lengthtotal;
1799         return VLC_SUCCESS;
1800     }
1801 }
1802
1803 static int AVI_TrackSeek( demux_t *p_demux,
1804                            int i_stream,
1805                            mtime_t i_date )
1806 {
1807     demux_sys_t  *p_sys = p_demux->p_sys;
1808     avi_track_t  *tk = p_sys->track[i_stream];
1809
1810 #define p_stream    p_sys->track[i_stream]
1811     mtime_t i_oldpts;
1812
1813     i_oldpts = AVI_GetPTS( p_stream );
1814
1815     if( !p_stream->i_samplesize )
1816     {
1817         if( AVI_StreamChunkSet( p_demux,
1818                                 i_stream,
1819                                 AVI_PTSToChunk( p_stream, i_date ) ) )
1820         {
1821             return VLC_EGENERIC;
1822         }
1823
1824         if( p_stream->i_cat == AUDIO_ES )
1825         {
1826             unsigned int i;
1827             tk->i_blockno = 0;
1828             for( i = 0; i < tk->i_idxposc; i++ )
1829             {
1830                 if( tk->i_blocksize > 0 )
1831                 {
1832                     tk->i_blockno += ( tk->p_index[i].i_length + tk->i_blocksize - 1 ) / tk->i_blocksize;
1833                 }
1834                 else
1835                 {
1836                     tk->i_blockno++;
1837                 }
1838             }
1839         }
1840
1841         msg_Dbg( p_demux,
1842                  "old:%"PRId64" %s new %"PRId64,
1843                  i_oldpts,
1844                  i_oldpts > i_date ? ">" : "<",
1845                  i_date );
1846
1847         if( p_stream->i_cat == VIDEO_ES )
1848         {
1849             /* search key frame */
1850             //if( i_date < i_oldpts || 1 )
1851             {
1852                 while( p_stream->i_idxposc > 0 &&
1853                    !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1854                                                                 AVIIF_KEYFRAME ) )
1855                 {
1856                     if( AVI_StreamChunkSet( p_demux,
1857                                             i_stream,
1858                                             p_stream->i_idxposc - 1 ) )
1859                     {
1860                         return VLC_EGENERIC;
1861                     }
1862                 }
1863             }
1864 #if 0
1865             else
1866             {
1867                 while( p_stream->i_idxposc < p_stream->i_idxnb &&
1868                         !( p_stream->p_index[p_stream->i_idxposc].i_flags &
1869                                                                 AVIIF_KEYFRAME ) )
1870                 {
1871                     if( AVI_StreamChunkSet( p_demux,
1872                                             i_stream,
1873                                             p_stream->i_idxposc + 1 ) )
1874                     {
1875                         return VLC_EGENERIC;
1876                     }
1877                 }
1878             }
1879 #endif
1880         }
1881     }
1882     else
1883     {
1884         if( AVI_StreamBytesSet( p_demux,
1885                                 i_stream,
1886                                 AVI_PTSToByte( p_stream, i_date ) ) )
1887         {
1888             return VLC_EGENERIC;
1889         }
1890     }
1891     return VLC_SUCCESS;
1892 #undef p_stream
1893 }
1894
1895 /****************************************************************************
1896  * Return true if it's a key frame
1897  ****************************************************************************/
1898 static int AVI_GetKeyFlag( vlc_fourcc_t i_fourcc, uint8_t *p_byte )
1899 {
1900     switch( i_fourcc )
1901     {
1902         case VLC_CODEC_DIV1:
1903             /* we have:
1904              *  startcode:      0x00000100   32bits
1905              *  framenumber     ?             5bits
1906              *  piture type     0(I),1(P)     2bits
1907              */
1908             if( GetDWBE( p_byte ) != 0x00000100 )
1909             {
1910                 /* it's not an msmpegv1 stream, strange...*/
1911                 return AVIIF_KEYFRAME;
1912             }
1913             return p_byte[4] & 0x06 ? 0 : AVIIF_KEYFRAME;
1914
1915         case VLC_CODEC_DIV2:
1916         case VLC_CODEC_DIV3:
1917         case VLC_CODEC_WMV1:
1918             /* we have
1919              *  picture type    0(I),1(P)     2bits
1920              */
1921             return p_byte[0] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1922         case VLC_CODEC_MP4V:
1923             /* we should find first occurrence of 0x000001b6 (32bits)
1924              *  startcode:      0x000001b6   32bits
1925              *  piture type     0(I),1(P)     2bits
1926              */
1927             if( GetDWBE( p_byte ) != 0x000001b6 )
1928             {
1929                 /* not true , need to find the first VOP header */
1930                 return AVIIF_KEYFRAME;
1931             }
1932             return p_byte[4] & 0xC0 ? 0 : AVIIF_KEYFRAME;
1933
1934         default:
1935             /* I can't do it, so say yes */
1936             return AVIIF_KEYFRAME;
1937     }
1938 }
1939
1940 vlc_fourcc_t AVI_FourccGetCodec( unsigned int i_cat, vlc_fourcc_t i_codec )
1941 {
1942     switch( i_cat )
1943     {
1944         case AUDIO_ES:
1945             wf_tag_to_fourcc( i_codec, &i_codec, NULL );
1946             return i_codec;
1947         case VIDEO_ES:
1948             return vlc_fourcc_GetCodec( i_cat, i_codec );
1949         default:
1950             return VLC_FOURCC( 'u', 'n', 'd', 'f' );
1951     }
1952 }
1953
1954 /****************************************************************************
1955  *
1956  ****************************************************************************/
1957 static void AVI_ParseStreamHeader( vlc_fourcc_t i_id,
1958                                    unsigned int *pi_number, unsigned int *pi_type )
1959 {
1960 #define SET_PTR( p, v ) if( p ) *(p) = (v);
1961     int c1, c2;
1962
1963     c1 = ((uint8_t *)&i_id)[0];
1964     c2 = ((uint8_t *)&i_id)[1];
1965
1966     if( c1 < '0' || c1 > '9' || c2 < '0' || c2 > '9' )
1967     {
1968         SET_PTR( pi_number, 100 ); /* > max stream number */
1969         SET_PTR( pi_type, UNKNOWN_ES );
1970     }
1971     else
1972     {
1973         SET_PTR( pi_number, (c1 - '0') * 10 + (c2 - '0' ) );
1974         switch( VLC_TWOCC( ((uint8_t *)&i_id)[2], ((uint8_t *)&i_id)[3] ) )
1975         {
1976             case AVITWOCC_wb:
1977                 SET_PTR( pi_type, AUDIO_ES );
1978                 break;
1979             case AVITWOCC_dc:
1980             case AVITWOCC_db:
1981             case AVITWOCC_AC:
1982                 SET_PTR( pi_type, VIDEO_ES );
1983                 break;
1984             default:
1985                 SET_PTR( pi_type, UNKNOWN_ES );
1986                 break;
1987         }
1988     }
1989 #undef SET_PTR
1990 }
1991
1992 /****************************************************************************
1993  *
1994  ****************************************************************************/
1995 static int AVI_PacketGetHeader( demux_t *p_demux, avi_packet_t *p_pk )
1996 {
1997     const uint8_t *p_peek;
1998
1999     if( stream_Peek( p_demux->s, &p_peek, 16 ) < 16 )
2000     {
2001         return VLC_EGENERIC;
2002     }
2003     p_pk->i_fourcc  = VLC_FOURCC( p_peek[0], p_peek[1], p_peek[2], p_peek[3] );
2004     p_pk->i_size    = GetDWLE( p_peek + 4 );
2005     p_pk->i_pos     = stream_Tell( p_demux->s );
2006     if( p_pk->i_fourcc == AVIFOURCC_LIST || p_pk->i_fourcc == AVIFOURCC_RIFF )
2007     {
2008         p_pk->i_type = VLC_FOURCC( p_peek[8],  p_peek[9],
2009                                    p_peek[10], p_peek[11] );
2010     }
2011     else
2012     {
2013         p_pk->i_type = 0;
2014     }
2015
2016     memcpy( p_pk->i_peek, p_peek + 8, 8 );
2017
2018     AVI_ParseStreamHeader( p_pk->i_fourcc, &p_pk->i_stream, &p_pk->i_cat );
2019     return VLC_SUCCESS;
2020 }
2021
2022 static int AVI_PacketNext( demux_t *p_demux )
2023 {
2024     avi_packet_t    avi_ck;
2025     int             i_skip = 0;
2026
2027     if( AVI_PacketGetHeader( p_demux, &avi_ck ) )
2028     {
2029         return VLC_EGENERIC;
2030     }
2031
2032     if( avi_ck.i_fourcc == AVIFOURCC_LIST &&
2033         ( avi_ck.i_type == AVIFOURCC_rec || avi_ck.i_type == AVIFOURCC_movi ) )
2034     {
2035         i_skip = 12;
2036     }
2037     else if( avi_ck.i_fourcc == AVIFOURCC_RIFF &&
2038              avi_ck.i_type == AVIFOURCC_AVIX )
2039     {
2040         i_skip = 24;
2041     }
2042     else
2043     {
2044         i_skip = __EVEN( avi_ck.i_size ) + 8;
2045     }
2046
2047     if( stream_Read( p_demux->s, NULL, i_skip ) != i_skip )
2048     {
2049         return VLC_EGENERIC;
2050     }
2051     return VLC_SUCCESS;
2052 }
2053
2054 static int AVI_PacketRead( demux_t   *p_demux,
2055                            avi_packet_t     *p_pk,
2056                            block_t          **pp_frame )
2057 {
2058     size_t i_size;
2059
2060     i_size = __EVEN( p_pk->i_size + 8 );
2061
2062     if( ( *pp_frame = stream_Block( p_demux->s, i_size ) ) == NULL )
2063     {
2064         return VLC_EGENERIC;
2065     }
2066     (*pp_frame)->p_buffer += 8;
2067     (*pp_frame)->i_buffer -= 8;
2068
2069     if( i_size != p_pk->i_size + 8 )
2070     {
2071         (*pp_frame)->i_buffer--;
2072     }
2073
2074     return VLC_SUCCESS;
2075 }
2076
2077 static int AVI_PacketSearch( demux_t *p_demux )
2078 {
2079     demux_sys_t     *p_sys = p_demux->p_sys;
2080     avi_packet_t    avi_pk;
2081     int             i_count = 0;
2082
2083     for( ;; )
2084     {
2085         if( stream_Read( p_demux->s, NULL, 1 ) != 1 )
2086         {
2087             return VLC_EGENERIC;
2088         }
2089         AVI_PacketGetHeader( p_demux, &avi_pk );
2090         if( avi_pk.i_stream < p_sys->i_track &&
2091             ( avi_pk.i_cat == AUDIO_ES || avi_pk.i_cat == VIDEO_ES ) )
2092         {
2093             return VLC_SUCCESS;
2094         }
2095         switch( avi_pk.i_fourcc )
2096         {
2097             case AVIFOURCC_JUNK:
2098             case AVIFOURCC_LIST:
2099             case AVIFOURCC_RIFF:
2100             case AVIFOURCC_idx1:
2101                 return VLC_SUCCESS;
2102         }
2103
2104         /* Prevents from eating all the CPU with broken files.
2105          * This value should be low enough so that it doesn't affect the
2106          * reading speed too much (not that we care much anyway because
2107          * this code is called only on broken files). */
2108         if( !(++i_count % 1024) )
2109         {
2110             if( !vlc_object_alive (p_demux) ) return VLC_EGENERIC;
2111
2112             msleep( 10000 );
2113             if( !(i_count % (1024 * 10)) )
2114                 msg_Warn( p_demux, "trying to resync..." );
2115         }
2116     }
2117 }
2118
2119 /****************************************************************************
2120  * Index stuff.
2121  ****************************************************************************/
2122 static void AVI_IndexAddEntry( demux_sys_t *p_sys,
2123                                int i_stream,
2124                                avi_entry_t *p_index)
2125 {
2126     avi_track_t *tk = p_sys->track[i_stream];
2127
2128     /* Update i_movi_lastchunk_pos */
2129     if( p_sys->i_movi_lastchunk_pos < p_index->i_pos )
2130     {
2131         p_sys->i_movi_lastchunk_pos = p_index->i_pos;
2132     }
2133
2134     /* add the entry */
2135     if( tk->i_idxnb >= tk->i_idxmax )
2136     {
2137         tk->i_idxmax += 16384;
2138         tk->p_index = realloc_or_free( tk->p_index,
2139                                        tk->i_idxmax * sizeof( avi_entry_t ) );
2140         if( tk->p_index == NULL )
2141         {
2142             return;
2143         }
2144     }
2145     /* calculate cumulate length */
2146     if( tk->i_idxnb > 0 )
2147     {
2148         p_index->i_lengthtotal =
2149             tk->p_index[tk->i_idxnb - 1].i_length +
2150                 tk->p_index[tk->i_idxnb - 1].i_lengthtotal;
2151     }
2152     else
2153     {
2154         p_index->i_lengthtotal = 0;
2155     }
2156
2157     tk->p_index[tk->i_idxnb++] = *p_index;
2158 }
2159
2160 static int AVI_IndexFind_idx1( demux_t *p_demux,
2161                                avi_chunk_idx1_t **pp_idx1,
2162                                uint64_t *pi_offset )
2163 {
2164     demux_sys_t *p_sys = p_demux->p_sys;
2165
2166     avi_chunk_list_t *p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2167     avi_chunk_idx1_t *p_idx1 = AVI_ChunkFind( p_riff, AVIFOURCC_idx1, 0);
2168
2169     if( !p_idx1 )
2170     {
2171         msg_Warn( p_demux, "cannot find idx1 chunk, no index defined" );
2172         return VLC_EGENERIC;
2173     }
2174     *pp_idx1 = p_idx1;
2175
2176     /* *** calculate offset *** */
2177     /* Well, avi is __SHIT__ so test more than one entry
2178      * (needed for some avi files) */
2179     avi_chunk_list_t *p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2180     *pi_offset = 0;
2181     for( unsigned i = 0; i < __MIN( p_idx1->i_entry_count, 10 ); i++ )
2182     {
2183         if( p_idx1->entry[i].i_pos < p_movi->i_chunk_pos )
2184         {
2185             *pi_offset = p_movi->i_chunk_pos + 8;
2186             break;
2187         }
2188     }
2189     return VLC_SUCCESS;
2190 }
2191
2192 static int AVI_IndexLoad_idx1( demux_t *p_demux )
2193 {
2194     demux_sys_t *p_sys = p_demux->p_sys;
2195
2196     avi_chunk_idx1_t *p_idx1;
2197     uint64_t         i_offset;
2198     if( AVI_IndexFind_idx1( p_demux, &p_idx1, &i_offset ) )
2199         return VLC_EGENERIC;
2200
2201     /* Init b_keyset */
2202     bool b_keyset[100];
2203     for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2204         b_keyset[i_stream] = false;
2205
2206     for( unsigned i_index = 0; i_index < p_idx1->i_entry_count; i_index++ )
2207     {
2208         unsigned i_cat;
2209         unsigned i_stream;
2210
2211         AVI_ParseStreamHeader( p_idx1->entry[i_index].i_fourcc,
2212                                &i_stream,
2213                                &i_cat );
2214         if( i_stream < p_sys->i_track &&
2215             i_cat == p_sys->track[i_stream]->i_cat )
2216         {
2217             avi_entry_t index;
2218             index.i_id      = p_idx1->entry[i_index].i_fourcc;
2219             index.i_flags   =
2220                 p_idx1->entry[i_index].i_flags&(~AVIIF_FIXKEYFRAME);
2221             index.i_pos     = p_idx1->entry[i_index].i_pos + i_offset;
2222             index.i_length  = p_idx1->entry[i_index].i_length;
2223             AVI_IndexAddEntry( p_sys, i_stream, &index );
2224
2225             if( index.i_flags&AVIIF_KEYFRAME )
2226                 b_keyset[i_stream] = true;
2227         }
2228     }
2229
2230     for( unsigned i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2231     {
2232         if( !b_keyset[i_stream] )
2233         {
2234             avi_track_t *tk = p_sys->track[i_stream];
2235
2236             msg_Dbg( p_demux, "no key frame set for track %d", i_stream );
2237             for( unsigned i_index = 0; i_index < tk->i_idxnb; i_index++ )
2238                 tk->p_index[i_index].i_flags |= AVIIF_KEYFRAME;
2239         }
2240     }
2241     return VLC_SUCCESS;
2242 }
2243
2244 static void __Parse_indx( demux_t    *p_demux,
2245                           int               i_stream,
2246                           avi_chunk_indx_t  *p_indx )
2247 {
2248     demux_sys_t         *p_sys    = p_demux->p_sys;
2249     avi_entry_t     index;
2250     int32_t             i;
2251
2252     msg_Dbg( p_demux, "loading subindex(0x%x) %d entries", p_indx->i_indextype, p_indx->i_entriesinuse );
2253     if( p_indx->i_indexsubtype == 0 )
2254     {
2255         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2256         {
2257             index.i_id      = p_indx->i_id;
2258             index.i_flags   = p_indx->idx.std[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2259             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.std[i].i_offset - 8;
2260             index.i_length  = p_indx->idx.std[i].i_size&0x7fffffff;
2261
2262             AVI_IndexAddEntry( p_sys, i_stream, &index );
2263         }
2264     }
2265     else if( p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
2266     {
2267         for( i = 0; i < p_indx->i_entriesinuse; i++ )
2268         {
2269             index.i_id      = p_indx->i_id;
2270             index.i_flags   = p_indx->idx.field[i].i_size & 0x80000000 ? 0 : AVIIF_KEYFRAME;
2271             index.i_pos     = p_indx->i_baseoffset + p_indx->idx.field[i].i_offset - 8;
2272             index.i_length  = p_indx->idx.field[i].i_size;
2273
2274             AVI_IndexAddEntry( p_sys, i_stream, &index );
2275         }
2276     }
2277     else
2278     {
2279         msg_Warn( p_demux, "unknown subtype index(0x%x)", p_indx->i_indexsubtype );
2280     }
2281 }
2282
2283 static void AVI_IndexLoad_indx( demux_t *p_demux )
2284 {
2285     demux_sys_t         *p_sys = p_demux->p_sys;
2286     unsigned int        i_stream;
2287     int32_t             i;
2288
2289     avi_chunk_list_t    *p_riff;
2290     avi_chunk_list_t    *p_hdrl;
2291
2292     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2293     p_hdrl = AVI_ChunkFind( p_riff, AVIFOURCC_hdrl, 0 );
2294
2295     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2296     {
2297         avi_chunk_list_t    *p_strl;
2298         avi_chunk_indx_t    *p_indx;
2299
2300 #define p_stream  p_sys->track[i_stream]
2301         p_strl = AVI_ChunkFind( p_hdrl, AVIFOURCC_strl, i_stream );
2302         p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0 );
2303
2304         if( !p_indx )
2305         {
2306             msg_Warn( p_demux, "cannot find indx (misdetect/broken OpenDML "
2307                                "file?)" );
2308             continue;
2309         }
2310
2311         if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS )
2312         {
2313             __Parse_indx( p_demux, i_stream, p_indx );
2314         }
2315         else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
2316         {
2317             avi_chunk_t    ck_sub;
2318             for( i = 0; i < p_indx->i_entriesinuse; i++ )
2319             {
2320                 if( stream_Seek( p_demux->s, p_indx->idx.super[i].i_offset )||
2321                     AVI_ChunkRead( p_demux->s, &ck_sub, NULL  ) )
2322                 {
2323                     break;
2324                 }
2325                 __Parse_indx( p_demux, i_stream, &ck_sub.indx );
2326                 AVI_ChunkFree( p_demux->s, &ck_sub );
2327             }
2328         }
2329         else
2330         {
2331             msg_Warn( p_demux, "unknown type index(0x%x)", p_indx->i_indextype );
2332         }
2333 #undef p_stream
2334     }
2335 }
2336
2337 static void AVI_IndexLoad( demux_t *p_demux )
2338 {
2339     demux_sys_t *p_sys = p_demux->p_sys;
2340     unsigned int i_stream;
2341
2342     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2343     {
2344         p_sys->track[i_stream]->i_idxnb  = 0;
2345         p_sys->track[i_stream]->i_idxmax = 0;
2346         p_sys->track[i_stream]->p_index  = NULL;
2347     }
2348
2349     if( p_sys->b_odml )
2350     {
2351         AVI_IndexLoad_indx( p_demux );
2352     }
2353     else  if( AVI_IndexLoad_idx1( p_demux ) )
2354     {
2355         /* try indx if idx1 failed as some "normal" file have indx too */
2356         AVI_IndexLoad_indx( p_demux );
2357     }
2358
2359     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2360     {
2361         msg_Dbg( p_demux, "stream[%d] created %d index entries",
2362                 i_stream, p_sys->track[i_stream]->i_idxnb );
2363     }
2364 }
2365
2366 static void AVI_IndexCreate( demux_t *p_demux )
2367 {
2368     demux_sys_t *p_sys = p_demux->p_sys;
2369
2370     avi_chunk_list_t *p_riff;
2371     avi_chunk_list_t *p_movi;
2372
2373     unsigned int i_stream;
2374     off_t i_movi_end;
2375
2376     mtime_t i_dialog_update;
2377     dialog_progress_bar_t *p_dialog = NULL;
2378
2379     p_riff = AVI_ChunkFind( &p_sys->ck_root, AVIFOURCC_RIFF, 0);
2380     p_movi = AVI_ChunkFind( p_riff, AVIFOURCC_movi, 0);
2381
2382     if( !p_movi )
2383     {
2384         msg_Err( p_demux, "cannot find p_movi" );
2385         return;
2386     }
2387
2388     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2389     {
2390         p_sys->track[i_stream]->i_idxnb  = 0;
2391         p_sys->track[i_stream]->i_idxmax = 0;
2392         p_sys->track[i_stream]->p_index  = NULL;
2393     }
2394     i_movi_end = __MIN( (off_t)(p_movi->i_chunk_pos + p_movi->i_chunk_size),
2395                         stream_Size( p_demux->s ) );
2396
2397     stream_Seek( p_demux->s, p_movi->i_chunk_pos + 12 );
2398     msg_Warn( p_demux, "creating index from LIST-movi, will take time !" );
2399
2400
2401     /* Only show dialog if AVI is > 10MB */
2402     i_dialog_update = mdate();
2403     if( stream_Size( p_demux->s ) > 10000000 )
2404         p_dialog = dialog_ProgressCreate( p_demux, _("Fixing AVI Index..."),
2405                                        NULL, _("Cancel") );
2406
2407     for( ;; )
2408     {
2409         avi_packet_t pk;
2410
2411         if( !vlc_object_alive (p_demux) )
2412             break;
2413
2414         /* Don't update/check dialog too often */
2415         if( p_dialog && mdate() - i_dialog_update > 100000 )
2416         {
2417             if( dialog_ProgressCancelled( p_dialog ) )
2418                 break;
2419
2420             double f_current = stream_Tell( p_demux->s );
2421             double f_size    = stream_Size( p_demux->s );
2422             double f_pos     = f_current / f_size;
2423             dialog_ProgressSet( p_dialog, NULL, f_pos );
2424
2425             i_dialog_update = mdate();
2426         }
2427
2428         if( AVI_PacketGetHeader( p_demux, &pk ) )
2429             break;
2430
2431         if( pk.i_stream < p_sys->i_track &&
2432             pk.i_cat == p_sys->track[pk.i_stream]->i_cat )
2433         {
2434             avi_entry_t index;
2435             index.i_id      = pk.i_fourcc;
2436             index.i_flags   =
2437                AVI_GetKeyFlag(p_sys->track[pk.i_stream]->i_codec, pk.i_peek);
2438             index.i_pos     = pk.i_pos;
2439             index.i_length  = pk.i_size;
2440             AVI_IndexAddEntry( p_sys, pk.i_stream, &index );
2441         }
2442         else
2443         {
2444             switch( pk.i_fourcc )
2445             {
2446             case AVIFOURCC_idx1:
2447                 if( p_sys->b_odml )
2448                 {
2449                     avi_chunk_list_t *p_sysx;
2450                     p_sysx = AVI_ChunkFind( &p_sys->ck_root,
2451                                             AVIFOURCC_RIFF, 1 );
2452
2453                     msg_Dbg( p_demux, "looking for new RIFF chunk" );
2454                     if( stream_Seek( p_demux->s, p_sysx->i_chunk_pos + 24 ) )
2455                         goto print_stat;
2456                     break;
2457                 }
2458                 goto print_stat;
2459
2460             case AVIFOURCC_RIFF:
2461                     msg_Dbg( p_demux, "new RIFF chunk found" );
2462                     break;
2463
2464             case AVIFOURCC_rec:
2465             case AVIFOURCC_JUNK:
2466                 break;
2467
2468             default:
2469                 msg_Warn( p_demux, "need resync, probably broken avi" );
2470                 if( AVI_PacketSearch( p_demux ) )
2471                 {
2472                     msg_Warn( p_demux, "lost sync, abord index creation" );
2473                     goto print_stat;
2474                 }
2475             }
2476         }
2477
2478         if( ( !p_sys->b_odml && pk.i_pos + pk.i_size >= i_movi_end ) ||
2479             AVI_PacketNext( p_demux ) )
2480         {
2481             break;
2482         }
2483     }
2484
2485 print_stat:
2486     if( p_dialog != NULL )
2487         dialog_ProgressDestroy( p_dialog );
2488
2489     for( i_stream = 0; i_stream < p_sys->i_track; i_stream++ )
2490     {
2491         msg_Dbg( p_demux, "stream[%d] creating %d index entries",
2492                 i_stream, p_sys->track[i_stream]->i_idxnb );
2493     }
2494 }
2495
2496 /*****************************************************************************
2497  * Subtitles
2498  *****************************************************************************/
2499 static void AVI_ExtractSubtitle( demux_t *p_demux,
2500                                  avi_chunk_list_t *p_strl,
2501                                  avi_chunk_STRING_t *p_strn )
2502 {
2503     demux_sys_t *p_sys = p_demux->p_sys;
2504     block_t *p_block = NULL;
2505     input_attachment_t *p_attachment = NULL;
2506     char *psz_description = NULL;
2507     avi_chunk_indx_t *p_indx = NULL;
2508
2509     if( !p_sys->b_seekable )
2510         goto exit;
2511
2512     p_indx = AVI_ChunkFind( p_strl, AVIFOURCC_indx, 0 );
2513     if( !p_indx )
2514         goto exit;
2515
2516     avi_chunk_t ck;
2517     if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES &&
2518         p_indx->i_entriesinuse > 0 )
2519     {
2520         if( stream_Seek( p_demux->s, p_indx->idx.super[0].i_offset )||
2521             AVI_ChunkRead( p_demux->s, &ck, NULL  ) )
2522             goto exit;
2523         p_indx = &ck.indx;
2524     }
2525
2526     if( p_indx->i_indextype != AVI_INDEX_OF_CHUNKS ||
2527         p_indx->i_entriesinuse != 1 ||
2528         p_indx->i_indexsubtype != 0 )
2529         goto exit;
2530
2531     /* */
2532     int64_t i_position  = p_indx->i_baseoffset +
2533                           p_indx->idx.std[0].i_offset - 8;
2534     unsigned i_size     = (p_indx->idx.std[0].i_size & 0x7fffffff) + 8;
2535     if( i_size > 1000000 )
2536         goto exit;
2537
2538     if( stream_Seek( p_demux->s, i_position ) )
2539         goto exit;
2540     p_block = stream_Block( p_demux->s, i_size );
2541     if( !p_block )
2542         goto exit;
2543
2544     /* Parse packet header */
2545     const uint8_t *p = p_block->p_buffer;
2546     if( i_size < 8 || p[2] != 't' || p[3] != 'x' )
2547         goto exit;
2548     p += 8;
2549     i_size -= 8;
2550
2551     /* Parse subtitle chunk header */
2552     if( i_size < 11 || memcmp( p, "GAB2", 4 ) ||
2553         p[4] != 0x00 || GetWLE( &p[5] ) != 0x2 )
2554         goto exit;
2555     const unsigned i_name = GetDWLE( &p[7] );
2556     if( 11 + i_size <= i_name )
2557         goto exit;
2558     if( i_name > 0 )
2559         psz_description = FromCharset( "UTF-16LE", &p[11], i_name );
2560     p += 11 + i_name;
2561     i_size -= 11 + i_name;
2562     if( i_size < 6 || GetWLE( &p[0] ) != 0x04 )
2563         goto exit;
2564     const unsigned i_payload = GetDWLE( &p[2] );
2565     if( i_size < 6 + i_payload || i_payload <= 0 )
2566         goto exit;
2567     p += 6;
2568     i_size -= 6;
2569
2570     if( !psz_description )
2571         psz_description = p_strn ? FromLatin1( p_strn->p_str ) : NULL;
2572     char *psz_name;
2573     if( asprintf( &psz_name, "subtitle%d.srt", p_sys->i_attachment ) <= 0 )
2574         psz_name = NULL;
2575     p_attachment = vlc_input_attachment_New( psz_name,
2576                                              "application/x-srt",
2577                                              psz_description,
2578                                              p, i_payload );
2579     if( p_attachment )
2580         TAB_APPEND( p_sys->i_attachment, p_sys->attachment, p_attachment );
2581     free( psz_name );
2582
2583 exit:
2584     free( psz_description );
2585
2586     if( p_block )
2587         block_Release( p_block );
2588
2589     if( p_attachment )
2590         msg_Dbg( p_demux, "Loaded an embed subtitle" );
2591     else
2592         msg_Warn( p_demux, "Failed to load an embed subtitle" );
2593
2594     if( p_indx == &ck.indx )
2595         AVI_ChunkFree( p_demux->s, &ck );
2596 }
2597 /*****************************************************************************
2598  * Stream management
2599  *****************************************************************************/
2600 static int AVI_TrackStopFinishedStreams( demux_t *p_demux )
2601 {
2602     demux_sys_t *p_sys = p_demux->p_sys;
2603     unsigned int i;
2604     int b_end = true;
2605
2606     for( i = 0; i < p_sys->i_track; i++ )
2607     {
2608         avi_track_t *tk = p_sys->track[i];
2609         if( tk->i_idxposc >= tk->i_idxnb )
2610         {
2611             tk->b_eof = true;
2612         }
2613         else
2614         {
2615             b_end = false;
2616         }
2617     }
2618     return( b_end );
2619 }
2620
2621 /****************************************************************************
2622  * AVI_MovieGetLength give max streams length in second
2623  ****************************************************************************/
2624 static mtime_t  AVI_MovieGetLength( demux_t *p_demux )
2625 {
2626     demux_sys_t  *p_sys = p_demux->p_sys;
2627     mtime_t      i_maxlength = 0;
2628     unsigned int i;
2629
2630     for( i = 0; i < p_sys->i_track; i++ )
2631     {
2632         avi_track_t *tk = p_sys->track[i];
2633         mtime_t i_length;
2634
2635         /* fix length for each stream */
2636         if( tk->i_idxnb < 1 || !tk->p_index )
2637         {
2638             continue;
2639         }
2640
2641         if( tk->i_samplesize )
2642         {
2643             i_length = AVI_GetDPTS( tk,
2644                                     tk->p_index[tk->i_idxnb-1].i_lengthtotal +
2645                                         tk->p_index[tk->i_idxnb-1].i_length );
2646         }
2647         else
2648         {
2649             i_length = AVI_GetDPTS( tk, tk->i_idxnb );
2650         }
2651         i_length /= (mtime_t)1000000;    /* in seconds */
2652
2653         msg_Dbg( p_demux,
2654                  "stream[%d] length:%"PRId64" (based on index)",
2655                  i,
2656                  i_length );
2657         i_maxlength = __MAX( i_maxlength, i_length );
2658     }
2659
2660     return i_maxlength;
2661 }