1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: libavi.c,v 1.27 2003/10/19 13:39:11 hartman Exp $
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
21 *****************************************************************************/
23 #include <stdlib.h> /* malloc(), free() */
26 #include <vlc/input.h>
27 #include "codecs.h" /* BITMAPINFOHEADER */
34 if( p ) {free( p ); p = NULL; }
36 #define __EVEN( x ) ( (x)&0x01 ? (x)+1 : (x) )
38 static vlc_fourcc_t GetFOURCC( byte_t *p_buff )
40 return VLC_FOURCC( p_buff[0], p_buff[1], p_buff[2], p_buff[3] );
43 #define AVI_ChunkFree( a, b ) _AVI_ChunkFree( (a), (avi_chunk_t*)(b) )
44 void _AVI_ChunkFree( stream_t *, avi_chunk_t *p_chk );
46 /****************************************************************************
48 * Basics functions to manipulates chunks
50 ****************************************************************************/
51 static int AVI_ChunkReadCommon( stream_t *s, avi_chunk_t *p_chk )
56 memset( p_chk, 0, sizeof( avi_chunk_t ) );
58 if( ( i_peek = stream_Peek( s, &p_peek, 8 ) ) < 8 )
63 p_chk->common.i_chunk_fourcc = GetFOURCC( p_peek );
64 p_chk->common.i_chunk_size = GetDWLE( p_peek + 4 );
65 p_chk->common.i_chunk_pos = stream_Tell( s );
67 p_chk->common.p_father = NULL;
68 p_chk->common.p_next = NULL;
69 p_chk->common.p_first = NULL;
70 p_chk->common.p_next = NULL;
73 msg_Dbg( (vlc_object_t*)s,
74 "Found Chunk fourcc:%8.8x (%4.4s) size:"I64Fd" pos:"I64Fd,
75 p_chk->common.i_chunk_fourcc,
76 (char*)&p_chk->common.i_chunk_fourcc,
77 p_chk->common.i_chunk_size,
78 p_chk->common.i_chunk_pos );
83 static int AVI_NextChunk( stream_t *s, avi_chunk_t *p_chk )
89 if( AVI_ChunkReadCommon( s, &chk ) )
96 if( p_chk->common.p_father )
98 if( p_chk->common.p_father->common.i_chunk_pos +
99 __EVEN( p_chk->common.p_father->common.i_chunk_size ) + 8 <
100 p_chk->common.i_chunk_pos +
101 __EVEN( p_chk->common.i_chunk_size ) + 8 )
106 return stream_Seek( s, p_chk->common.i_chunk_pos +
107 __EVEN( p_chk->common.i_chunk_size ) + 8 );
110 /****************************************************************************
112 * Functions to read chunks
114 ****************************************************************************/
115 static int AVI_ChunkRead_list( stream_t *s, avi_chunk_t *p_container )
119 vlc_bool_t b_seekable;
121 if( p_container->common.i_chunk_size < 8 )
124 msg_Warn( (vlc_object_t*)s, "empty list chunk" );
127 if( stream_Peek( s, &p_peek, 12 ) < 12 )
129 msg_Warn( (vlc_object_t*)s, "cannot peek while reading list chunk" );
133 stream_Control( s, STREAM_CAN_FASTSEEK, &b_seekable );
135 p_container->list.i_type = GetFOURCC( p_peek + 8 );
137 if( p_container->common.i_chunk_fourcc == AVIFOURCC_LIST &&
138 p_container->list.i_type == AVIFOURCC_movi )
140 msg_Dbg( (vlc_object_t*)s, "Skipping movi chunk" );
143 return AVI_NextChunk( s, p_container );
145 return VLC_SUCCESS; /* point at begining of LIST-movi */
148 if( stream_Read( s, NULL, 12 ) != 12 )
150 msg_Warn( (vlc_object_t*)s, "cannot enter chunk" );
155 msg_Dbg( (vlc_object_t*)s,
156 "found LIST chunk: \'%4.4s\'",
157 (char*)&p_container->list.i_type );
159 msg_Dbg( (vlc_object_t*)s, "<list \'%4.4s\'>", (char*)&p_container->list.i_type );
162 p_chk = malloc( sizeof( avi_chunk_t ) );
163 memset( p_chk, 0, sizeof( avi_chunk_t ) );
164 if( !p_container->common.p_first )
166 p_container->common.p_first = p_chk;
170 p_container->common.p_last->common.p_next = p_chk;
172 p_container->common.p_last = p_chk;
174 if( AVI_ChunkRead( s, p_chk, p_container ) ||
175 ( stream_Tell( s ) >=
176 (off_t)p_chk->common.p_father->common.i_chunk_pos +
177 (off_t)__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
181 /* If we can't seek then stop when we 've found LIST-movi */
182 if( p_chk->common.i_chunk_fourcc == AVIFOURCC_LIST &&
183 p_chk->list.i_type == AVIFOURCC_movi && !b_seekable )
189 msg_Dbg( (vlc_object_t*)s, "</list \'%4.4s\'>", (char*)&p_container->list.i_type );
194 #define AVI_READCHUNK_ENTER \
195 int64_t i_read = __EVEN(p_chk->common.i_chunk_size ) + 8; \
196 uint8_t *p_read, *p_buff; \
197 if( !( p_read = p_buff = malloc(i_read ) ) ) \
199 return VLC_EGENERIC; \
201 i_read = stream_Read( s, p_read, i_read ); \
202 if( i_read < (int64_t)__EVEN(p_chk->common.i_chunk_size ) + 8 ) \
204 return VLC_EGENERIC; \
209 #define AVI_READCHUNK_EXIT( code ) \
213 msg_Warn( (vlc_object_t*)s, "not enough data" ); \
217 #define AVI_READ1BYTE( i_byte ) \
222 #define AVI_READ2BYTES( i_word ) \
223 i_word = GetWLE( p_read ); \
227 #define AVI_READ4BYTES( i_dword ) \
228 i_dword = GetDWLE( p_read ); \
232 #define AVI_READ8BYTES( i_dword ) \
233 i_dword = GetQWLE( p_read ); \
237 #define AVI_READFOURCC( i_dword ) \
238 i_dword = GetFOURCC( p_read ); \
242 static int AVI_ChunkRead_avih( stream_t *s, avi_chunk_t *p_chk )
246 AVI_READ4BYTES( p_chk->avih.i_microsecperframe);
247 AVI_READ4BYTES( p_chk->avih.i_maxbytespersec );
248 AVI_READ4BYTES( p_chk->avih.i_reserved1 );
249 AVI_READ4BYTES( p_chk->avih.i_flags );
250 AVI_READ4BYTES( p_chk->avih.i_totalframes );
251 AVI_READ4BYTES( p_chk->avih.i_initialframes );
252 AVI_READ4BYTES( p_chk->avih.i_streams );
253 AVI_READ4BYTES( p_chk->avih.i_suggestedbuffersize );
254 AVI_READ4BYTES( p_chk->avih.i_width );
255 AVI_READ4BYTES( p_chk->avih.i_height );
256 AVI_READ4BYTES( p_chk->avih.i_scale );
257 AVI_READ4BYTES( p_chk->avih.i_rate );
258 AVI_READ4BYTES( p_chk->avih.i_start );
259 AVI_READ4BYTES( p_chk->avih.i_length );
261 msg_Dbg( (vlc_object_t*)s,
262 "avih: streams:%d flags:%s%s%s%s %dx%d",
263 p_chk->avih.i_streams,
264 p_chk->avih.i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
265 p_chk->avih.i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
266 p_chk->avih.i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
267 p_chk->avih.i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"",
268 p_chk->avih.i_width, p_chk->avih.i_height );
270 AVI_READCHUNK_EXIT( VLC_SUCCESS );
273 static int AVI_ChunkRead_strh( stream_t *s, avi_chunk_t *p_chk )
277 AVI_READFOURCC( p_chk->strh.i_type );
278 AVI_READFOURCC( p_chk->strh.i_handler );
279 AVI_READ4BYTES( p_chk->strh.i_flags );
280 AVI_READ4BYTES( p_chk->strh.i_reserved1 );
281 AVI_READ4BYTES( p_chk->strh.i_initialframes );
282 AVI_READ4BYTES( p_chk->strh.i_scale );
283 AVI_READ4BYTES( p_chk->strh.i_rate );
284 AVI_READ4BYTES( p_chk->strh.i_start );
285 AVI_READ4BYTES( p_chk->strh.i_length );
286 AVI_READ4BYTES( p_chk->strh.i_suggestedbuffersize );
287 AVI_READ4BYTES( p_chk->strh.i_quality );
288 AVI_READ4BYTES( p_chk->strh.i_samplesize );
290 msg_Dbg( (vlc_object_t*)s,
291 "strh: type:%4.4s handler:0x%8.8x samplesize:%d %.2ffps",
292 (char*)&p_chk->strh.i_type,
293 p_chk->strh.i_handler,
294 p_chk->strh.i_samplesize,
295 ( p_chk->strh.i_scale ?
296 (float)p_chk->strh.i_rate / (float)p_chk->strh.i_scale : -1) );
299 AVI_READCHUNK_EXIT( VLC_SUCCESS );
302 static int AVI_ChunkRead_strf( stream_t *s, avi_chunk_t *p_chk )
307 if( p_chk->common.p_father == NULL )
309 msg_Err( (vlc_object_t*)s, "malformed avi file" );
310 AVI_READCHUNK_EXIT( VLC_EGENERIC );
312 if( !( p_strh = AVI_ChunkFind( p_chk->common.p_father, AVIFOURCC_strh, 0 ) ) )
314 msg_Err( (vlc_object_t*)s, "malformed avi file" );
315 AVI_READCHUNK_EXIT( VLC_EGENERIC );
318 switch( p_strh->strh.i_type )
320 case( AVIFOURCC_auds ):
321 p_chk->strf.auds.i_cat = AUDIO_ES;
322 p_chk->strf.auds.p_wf = malloc( __MAX( p_chk->common.i_chunk_size, sizeof( WAVEFORMATEX ) ) );
323 AVI_READ2BYTES( p_chk->strf.auds.p_wf->wFormatTag );
324 AVI_READ2BYTES( p_chk->strf.auds.p_wf->nChannels );
325 AVI_READ4BYTES( p_chk->strf.auds.p_wf->nSamplesPerSec );
326 AVI_READ4BYTES( p_chk->strf.auds.p_wf->nAvgBytesPerSec );
327 AVI_READ2BYTES( p_chk->strf.auds.p_wf->nBlockAlign );
328 AVI_READ2BYTES( p_chk->strf.auds.p_wf->wBitsPerSample );
329 if( p_chk->strf.auds.p_wf->wFormatTag != WAVE_FORMAT_PCM
330 && p_chk->common.i_chunk_size > sizeof( WAVEFORMATEX ) )
332 AVI_READ2BYTES( p_chk->strf.auds.p_wf->cbSize );
333 /* prevent segfault */
334 if( p_chk->strf.auds.p_wf->cbSize >
335 p_chk->common.i_chunk_size - sizeof( WAVEFORMATEX ) )
337 p_chk->strf.auds.p_wf->cbSize =
338 p_chk->common.i_chunk_size - sizeof( WAVEFORMATEX );
340 if( p_chk->strf.auds.p_wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE )
342 /* Found an extensible header atm almost nothing uses that. */
343 msg_Warn( (vlc_object_t*)s, "WAVE_FORMAT_EXTENSIBLE or vorbis
344 audio dectected: both are not supported" );
349 p_chk->strf.auds.p_wf->cbSize = 0;
351 if( p_chk->strf.auds.p_wf->cbSize > 0 )
353 memcpy( &p_chk->strf.auds.p_wf[1] ,
354 p_buff + 8 + sizeof( WAVEFORMATEX ), /* 8=fourrc+size */
355 p_chk->strf.auds.p_wf->cbSize );
358 msg_Dbg( (vlc_object_t*)s,
359 "strf: audio:0x%4.4x channels:%d %dHz %dbits/sample %dkb/s",
360 p_chk->strf.auds.p_wf->wFormatTag,
361 p_chk->strf.auds.p_wf->nChannels,
362 p_chk->strf.auds.p_wf->nSamplesPerSec,
363 p_chk->strf.auds.p_wf->wBitsPerSample,
364 p_chk->strf.auds.p_wf->nAvgBytesPerSec * 8 / 1024 );
367 case( AVIFOURCC_vids ):
368 p_strh->strh.i_samplesize = 0; /* XXX for ffmpeg avi file */
369 p_chk->strf.vids.i_cat = VIDEO_ES;
370 p_chk->strf.vids.p_bih = malloc( p_chk->common.i_chunk_size );
371 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biSize );
372 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biWidth );
373 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biHeight );
374 AVI_READ2BYTES( p_chk->strf.vids.p_bih->biPlanes );
375 AVI_READ2BYTES( p_chk->strf.vids.p_bih->biBitCount );
376 AVI_READFOURCC( p_chk->strf.vids.p_bih->biCompression );
377 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biSizeImage );
378 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biXPelsPerMeter );
379 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biYPelsPerMeter );
380 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biClrUsed );
381 AVI_READ4BYTES( p_chk->strf.vids.p_bih->biClrImportant );
382 if( p_chk->strf.vids.p_bih->biSize >
383 p_chk->common.i_chunk_size )
385 p_chk->strf.vids.p_bih->biSize = p_chk->common.i_chunk_size;
387 if( p_chk->strf.vids.p_bih->biSize - sizeof(BITMAPINFOHEADER) > 0 )
389 memcpy( &p_chk->strf.vids.p_bih[1],
390 p_buff + 8 + sizeof(BITMAPINFOHEADER), /* 8=fourrc+size */
391 p_chk->strf.vids.p_bih->biSize -
392 sizeof(BITMAPINFOHEADER) );
395 msg_Dbg( (vlc_object_t*)s,
396 "strf: video:%4.4s %dx%d planes:%d %dbpp",
397 (char*)&p_chk->strf.vids.p_bih->biCompression,
398 p_chk->strf.vids.p_bih->biWidth,
399 p_chk->strf.vids.p_bih->biHeight,
400 p_chk->strf.vids.p_bih->biPlanes,
401 p_chk->strf.vids.p_bih->biBitCount );
405 msg_Warn( (vlc_object_t*)s, "unknown stream type" );
406 p_chk->strf.common.i_cat = UNKNOWN_ES;
409 AVI_READCHUNK_EXIT( VLC_SUCCESS );
411 static void AVI_ChunkFree_strf( avi_chunk_t *p_chk )
413 avi_chunk_strf_t *p_strf = (avi_chunk_strf_t*)p_chk;
414 if( p_strf->common.i_cat == AUDIO_ES )
416 FREE( p_strf->auds.p_wf );
418 else if( p_strf->common.i_cat == VIDEO_ES )
420 FREE( p_strf->vids.p_bih );
424 static int AVI_ChunkRead_strd( stream_t *s, avi_chunk_t *p_chk )
427 p_chk->strd.p_data = malloc( p_chk->common.i_chunk_size );
428 memcpy( p_chk->strd.p_data,
430 p_chk->common.i_chunk_size );
431 AVI_READCHUNK_EXIT( VLC_SUCCESS );
434 static int AVI_ChunkRead_idx1( stream_t *s, avi_chunk_t *p_chk )
436 unsigned int i_count, i_index;
440 i_count = __MIN( (int64_t)p_chk->common.i_chunk_size, i_read ) / 16;
442 p_chk->idx1.i_entry_count = i_count;
443 p_chk->idx1.i_entry_max = i_count;
446 p_chk->idx1.entry = calloc( i_count, sizeof( idx1_entry_t ) );
448 for( i_index = 0; i_index < i_count ; i_index++ )
450 AVI_READFOURCC( p_chk->idx1.entry[i_index].i_fourcc );
451 AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_flags );
452 AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_pos );
453 AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_length );
458 p_chk->idx1.entry = NULL;
461 msg_Dbg( (vlc_object_t*)s, "idx1: index entry:%d", i_count );
463 AVI_READCHUNK_EXIT( VLC_SUCCESS );
466 static void AVI_ChunkFree_idx1( avi_chunk_t *p_chk )
468 p_chk->idx1.i_entry_count = 0;
469 p_chk->idx1.i_entry_max = 0;
470 FREE( p_chk->idx1.entry )
475 static int AVI_ChunkRead_indx( stream_t *s, avi_chunk_t *p_chk )
477 unsigned int i_count, i;
479 avi_chunk_indx_t *p_indx = (avi_chunk_indx_t*)p_chk;
483 AVI_READ2BYTES( p_indx->i_longsperentry );
484 AVI_READ1BYTE ( p_indx->i_indexsubtype );
485 AVI_READ1BYTE ( p_indx->i_indextype );
486 AVI_READ4BYTES( p_indx->i_entriesinuse );
488 AVI_READ4BYTES( p_indx->i_id );
489 p_indx->idx.std = NULL;
490 p_indx->idx.field = NULL;
491 p_indx->idx.super = NULL;
493 if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS && p_indx->i_indexsubtype == 0 )
495 AVI_READ8BYTES( p_indx->i_baseoffset );
496 AVI_READ4BYTES( i_dummy );
498 i_count = __MIN( p_indx->i_entriesinuse, i_read / 8 );
499 p_indx->i_entriesinuse = i_count;
500 p_indx->idx.std = calloc( sizeof( indx_std_entry_t ), i_count );
502 for( i = 0; i < i_count; i++ )
504 AVI_READ4BYTES( p_indx->idx.std[i].i_offset );
505 AVI_READ4BYTES( p_indx->idx.std[i].i_size );
508 else if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS && p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
510 AVI_READ8BYTES( p_indx->i_baseoffset );
511 AVI_READ4BYTES( i_dummy );
513 i_count = __MIN( p_indx->i_entriesinuse, i_read / 12 );
514 p_indx->i_entriesinuse = i_count;
515 p_indx->idx.field = calloc( sizeof( indx_field_entry_t ), i_count );
516 for( i = 0; i < i_count; i++ )
518 AVI_READ4BYTES( p_indx->idx.field[i].i_offset );
519 AVI_READ4BYTES( p_indx->idx.field[i].i_size );
520 AVI_READ4BYTES( p_indx->idx.field[i].i_offsetfield2 );
523 else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
525 p_indx->i_baseoffset = 0;
526 AVI_READ4BYTES( i_dummy );
527 AVI_READ4BYTES( i_dummy );
528 AVI_READ4BYTES( i_dummy );
530 i_count = __MIN( p_indx->i_entriesinuse, i_read / 16 );
531 p_indx->i_entriesinuse = i_count;
532 p_indx->idx.super = calloc( sizeof( indx_super_entry_t ), i_count );
534 for( i = 0; i < i_count; i++ )
536 AVI_READ8BYTES( p_indx->idx.super[i].i_offset );
537 AVI_READ4BYTES( p_indx->idx.super[i].i_size );
538 AVI_READ4BYTES( p_indx->idx.super[i].i_duration );
543 msg_Warn( (vlc_object_t*)s, "unknow type/subtype index" );
547 msg_Dbg( (vlc_object_t*)s, "indx: type=%d subtype=%d entry=%d", p_indx->i_indextype, p_indx->i_indexsubtype, p_indx->i_entriesinuse );
549 AVI_READCHUNK_EXIT( VLC_SUCCESS );
551 static void AVI_ChunkFree_indx( avi_chunk_t *p_chk )
553 avi_chunk_indx_t *p_indx = (avi_chunk_indx_t*)p_chk;
555 FREE( p_indx->idx.std );
556 FREE( p_indx->idx.field );
557 FREE( p_indx->idx.super );
564 vlc_fourcc_t i_fourcc;
568 { AVIFOURCC_IARL, "archive location" },
569 { AVIFOURCC_IART, "artist" },
570 { AVIFOURCC_ICMS, "commisioned" },
571 { AVIFOURCC_ICMT, "comments" },
572 { AVIFOURCC_ICOP, "copyright" },
573 { AVIFOURCC_ICRD, "creation date" },
574 { AVIFOURCC_ICRP, "cropped" },
575 { AVIFOURCC_IDIM, "dimensions" },
576 { AVIFOURCC_IDPI, "dots per inch" },
577 { AVIFOURCC_IENG, "enginner" },
578 { AVIFOURCC_IGNR, "genre" },
579 { AVIFOURCC_IKEY, "keywords" },
580 { AVIFOURCC_ILGT, "lightness" },
581 { AVIFOURCC_IMED, "medium" },
582 { AVIFOURCC_INAM, "name" },
583 { AVIFOURCC_IPLT, "palette setting" },
584 { AVIFOURCC_IPRD, "product" },
585 { AVIFOURCC_ISBJ, "subject" },
586 { AVIFOURCC_ISFT, "software" },
587 { AVIFOURCC_ISHP, "sharpness" },
588 { AVIFOURCC_ISRC, "source" },
589 { AVIFOURCC_ISRF, "source form" },
590 { AVIFOURCC_ITCH, "technician" },
591 { AVIFOURCC_ISMP, "time code" },
592 { AVIFOURCC_IDIT, "digitalization time" },
593 { AVIFOURCC_strn, "stream name" },
596 static int AVI_ChunkRead_strz( stream_t *s, avi_chunk_t *p_chk )
599 avi_chunk_STRING_t *p_strz = (avi_chunk_STRING_t*)p_chk;
602 for( i_index = 0;; i_index++)
604 if( !AVI_strz_type[i_index].i_fourcc ||
605 AVI_strz_type[i_index].i_fourcc == p_strz->i_chunk_fourcc )
610 p_strz->p_type = strdup( AVI_strz_type[i_index].psz_type );
611 p_strz->p_str = malloc( i_read + 1);
613 if( p_strz->i_chunk_size )
615 memcpy( p_strz->p_str, p_read, i_read );
617 p_strz->p_str[i_read] = 0;
620 msg_Dbg( (vlc_object_t*)s, "%4.4s: %s : %s",
621 (char*)&p_strz->i_chunk_fourcc, p_strz->p_type, p_strz->p_str);
623 AVI_READCHUNK_EXIT( VLC_SUCCESS );
625 static void AVI_ChunkFree_strz( avi_chunk_t *p_chk )
627 avi_chunk_STRING_t *p_strz = (avi_chunk_STRING_t*)p_chk;
628 FREE( p_strz->p_type );
629 FREE( p_strz->p_str );
632 static int AVI_ChunkRead_nothing( stream_t *s, avi_chunk_t *p_chk )
634 return AVI_NextChunk( s, p_chk );
636 static void AVI_ChunkFree_nothing( avi_chunk_t *p_chk )
643 vlc_fourcc_t i_fourcc;
644 int (*AVI_ChunkRead_function)( stream_t *s, avi_chunk_t *p_chk );
645 void (*AVI_ChunkFree_function)( avi_chunk_t *p_chk );
646 } AVI_Chunk_Function [] =
648 { AVIFOURCC_RIFF, AVI_ChunkRead_list, AVI_ChunkFree_nothing },
649 { AVIFOURCC_LIST, AVI_ChunkRead_list, AVI_ChunkFree_nothing },
650 { AVIFOURCC_avih, AVI_ChunkRead_avih, AVI_ChunkFree_nothing },
651 { AVIFOURCC_strh, AVI_ChunkRead_strh, AVI_ChunkFree_nothing },
652 { AVIFOURCC_strf, AVI_ChunkRead_strf, AVI_ChunkFree_strf },
653 { AVIFOURCC_strd, AVI_ChunkRead_strd, AVI_ChunkFree_nothing },
654 { AVIFOURCC_idx1, AVI_ChunkRead_idx1, AVI_ChunkFree_idx1 },
655 { AVIFOURCC_indx, AVI_ChunkRead_indx, AVI_ChunkFree_indx },
656 { AVIFOURCC_JUNK, AVI_ChunkRead_nothing, AVI_ChunkFree_nothing },
658 { AVIFOURCC_IARL, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
659 { AVIFOURCC_IARL, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
660 { AVIFOURCC_IART, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
661 { AVIFOURCC_ICMS, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
662 { AVIFOURCC_ICMT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
663 { AVIFOURCC_ICOP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
664 { AVIFOURCC_ICRD, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
665 { AVIFOURCC_ICRP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
666 { AVIFOURCC_IDIM, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
667 { AVIFOURCC_IDPI, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
668 { AVIFOURCC_IENG, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
669 { AVIFOURCC_IGNR, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
670 { AVIFOURCC_IKEY, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
671 { AVIFOURCC_ILGT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
672 { AVIFOURCC_IMED, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
673 { AVIFOURCC_INAM, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
674 { AVIFOURCC_IPLT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
675 { AVIFOURCC_IPRD, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
676 { AVIFOURCC_ISBJ, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
677 { AVIFOURCC_ISFT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
678 { AVIFOURCC_ISHP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
679 { AVIFOURCC_ISRC, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
680 { AVIFOURCC_ISRF, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
681 { AVIFOURCC_ITCH, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
682 { AVIFOURCC_ISMP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
683 { AVIFOURCC_IDIT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
684 { AVIFOURCC_strn, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
688 static int AVI_ChunkFunctionFind( vlc_fourcc_t i_fourcc )
690 unsigned int i_index;
691 for( i_index = 0; ; i_index++ )
693 if( ( AVI_Chunk_Function[i_index].i_fourcc == i_fourcc )||
694 ( AVI_Chunk_Function[i_index].i_fourcc == 0 ) )
701 int _AVI_ChunkRead( stream_t *s, avi_chunk_t *p_chk, avi_chunk_t *p_father )
710 if( AVI_ChunkReadCommon( s, p_chk ) )
712 msg_Warn( (vlc_object_t*)s, "cannot read one chunk" );
715 if( p_chk->common.i_chunk_fourcc == VLC_FOURCC( 0, 0, 0, 0 ) )
717 msg_Warn( (vlc_object_t*)s, "found null fourcc chunk (corrupted file?)" );
720 p_chk->common.p_father = p_father;
722 i_index = AVI_ChunkFunctionFind( p_chk->common.i_chunk_fourcc );
723 if( AVI_Chunk_Function[i_index].AVI_ChunkRead_function )
725 return AVI_Chunk_Function[i_index].AVI_ChunkRead_function( s, p_chk );
727 else if( ((char*)&p_chk->common.i_chunk_fourcc)[0] == 'i' &&
728 ((char*)&p_chk->common.i_chunk_fourcc)[1] == 'x' )
730 p_chk->common.i_chunk_fourcc = AVIFOURCC_indx;
731 return AVI_ChunkRead_indx( s, p_chk );
733 msg_Warn( (vlc_object_t*)s, "unknown chunk (not loaded)" );
734 return AVI_NextChunk( s, p_chk );
737 void _AVI_ChunkFree( stream_t *s,
741 avi_chunk_t *p_child, *p_next;
748 /* Free all child chunk */
749 p_child = p_chk->common.p_first;
752 p_next = p_child->common.p_next;
753 AVI_ChunkFree( s, p_child );
758 i_index = AVI_ChunkFunctionFind( p_chk->common.i_chunk_fourcc );
759 if( AVI_Chunk_Function[i_index].AVI_ChunkFree_function )
762 msg_Dbg( (vlc_object_t*)s, "free chunk %4.4s",
763 (char*)&p_chk->common.i_chunk_fourcc );
765 AVI_Chunk_Function[i_index].AVI_ChunkFree_function( p_chk);
769 msg_Warn( (vlc_object_t*)s, "unknown chunk (not unloaded)" );
771 p_chk->common.p_first = NULL;
772 p_chk->common.p_last = NULL;
777 static void AVI_ChunkDumpDebug_level( vlc_object_t *p_obj,
778 avi_chunk_t *p_chk, int i_level )
782 avi_chunk_t *p_child;
784 memset( str, ' ', sizeof( str ) );
785 for( i = 1; i < i_level; i++ )
789 if( p_chk->common.i_chunk_fourcc == AVIFOURCC_RIFF||
790 p_chk->common.i_chunk_fourcc == AVIFOURCC_LIST )
792 sprintf( str + i_level * 5,
793 "%c %4.4s-%4.4s size:"I64Fu" pos:"I64Fu,
795 (char*)&p_chk->common.i_chunk_fourcc,
796 (char*)&p_chk->list.i_type,
797 p_chk->common.i_chunk_size,
798 p_chk->common.i_chunk_pos );
802 sprintf( str + i_level * 5,
803 "+ %4.4s size:"I64Fu" pos:"I64Fu,
804 (char*)&p_chk->common.i_chunk_fourcc,
805 p_chk->common.i_chunk_size,
806 p_chk->common.i_chunk_pos );
808 msg_Dbg( p_obj, "%s", str );
810 p_child = p_chk->common.p_first;
813 AVI_ChunkDumpDebug_level( p_obj, p_child, i_level + 1 );
814 p_child = p_child->common.p_next;
818 int AVI_ChunkReadRoot( stream_t *s, avi_chunk_t *p_root )
820 avi_chunk_list_t *p_list = (avi_chunk_list_t*)p_root;
822 vlc_bool_t b_seekable;
824 stream_Control( s, STREAM_CAN_FASTSEEK, &b_seekable );
826 p_list->i_chunk_pos = 0;
827 p_list->i_chunk_size = stream_Size( s );
828 p_list->i_chunk_fourcc = AVIFOURCC_LIST;
829 p_list->p_father = NULL;
830 p_list->p_next = NULL;
831 p_list->p_first = NULL;
832 p_list->p_last = NULL;
834 p_list->i_type = VLC_FOURCC( 'r', 'o', 'o', 't' );
838 p_chk = malloc( sizeof( avi_chunk_t ) );
839 memset( p_chk, 0, sizeof( avi_chunk_t ) );
840 if( !p_root->common.p_first )
842 p_root->common.p_first = p_chk;
846 p_root->common.p_last->common.p_next = p_chk;
848 p_root->common.p_last = p_chk;
850 if( AVI_ChunkRead( s, p_chk, p_root ) ||
851 ( stream_Tell( s ) >=
852 (off_t)p_chk->common.p_father->common.i_chunk_pos +
853 (off_t)__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
857 /* If we can't seek then stop when we 've found first RIFF-AVI */
858 if( p_chk->common.i_chunk_fourcc == AVIFOURCC_RIFF &&
859 p_chk->list.i_type == AVIFOURCC_AVI && !b_seekable )
865 AVI_ChunkDumpDebug_level( (vlc_object_t*)s, p_root, 0 );
869 void AVI_ChunkFreeRoot( stream_t *s,
872 AVI_ChunkFree( s, p_chk );
876 int _AVI_ChunkCount( avi_chunk_t *p_chk, vlc_fourcc_t i_fourcc )
879 avi_chunk_t *p_child;
887 p_child = p_chk->common.p_first;
890 if( p_child->common.i_chunk_fourcc == i_fourcc ||
891 ( p_child->common.i_chunk_fourcc == AVIFOURCC_LIST &&
892 p_child->list.i_type == i_fourcc ) )
896 p_child = p_child->common.p_next;
901 void *_AVI_ChunkFind( avi_chunk_t *p_chk,
902 vlc_fourcc_t i_fourcc, int i_number )
904 avi_chunk_t *p_child;
909 p_child = p_chk->common.p_first;
913 if( p_child->common.i_chunk_fourcc == i_fourcc ||
914 ( p_child->common.i_chunk_fourcc == AVIFOURCC_LIST &&
915 p_child->list.i_type == i_fourcc ) )
925 p_child = p_child->common.p_next;