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