libavi.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:30k
- /*****************************************************************************
- * libavi.c : LibAVI
- *****************************************************************************
- * Copyright (C) 2001 VideoLAN
- * $Id: libavi.c 6961 2004-03-05 17:34:23Z sam $
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include "codecs.h" /* BITMAPINFOHEADER */
- #include "libavi.h"
- #define AVI_DEBUG 1
- #define FREE( p )
- if( p ) {free( p ); p = NULL; }
- #define __EVEN( x ) ( (x)&0x01 ? (x)+1 : (x) )
- static vlc_fourcc_t GetFOURCC( byte_t *p_buff )
- {
- return VLC_FOURCC( p_buff[0], p_buff[1], p_buff[2], p_buff[3] );
- }
- #define AVI_ChunkFree( a, b ) _AVI_ChunkFree( (a), (avi_chunk_t*)(b) )
- void _AVI_ChunkFree( stream_t *, avi_chunk_t *p_chk );
- /****************************************************************************
- *
- * Basics functions to manipulates chunks
- *
- ****************************************************************************/
- static int AVI_ChunkReadCommon( stream_t *s, avi_chunk_t *p_chk )
- {
- uint8_t *p_peek;
- int i_peek;
- memset( p_chk, 0, sizeof( avi_chunk_t ) );
- if( ( i_peek = stream_Peek( s, &p_peek, 8 ) ) < 8 )
- {
- return VLC_EGENERIC;
- }
- p_chk->common.i_chunk_fourcc = GetFOURCC( p_peek );
- p_chk->common.i_chunk_size = GetDWLE( p_peek + 4 );
- p_chk->common.i_chunk_pos = stream_Tell( s );
- p_chk->common.p_father = NULL;
- p_chk->common.p_next = NULL;
- p_chk->common.p_first = NULL;
- p_chk->common.p_next = NULL;
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "found Chunk fourcc:%8.8x (%4.4s) size:"I64Fd" pos:"I64Fd,
- p_chk->common.i_chunk_fourcc,
- (char*)&p_chk->common.i_chunk_fourcc,
- p_chk->common.i_chunk_size,
- p_chk->common.i_chunk_pos );
- #endif
- return VLC_SUCCESS;
- }
- static int AVI_NextChunk( stream_t *s, avi_chunk_t *p_chk )
- {
- avi_chunk_t chk;
- if( !p_chk )
- {
- if( AVI_ChunkReadCommon( s, &chk ) )
- {
- return VLC_EGENERIC;
- }
- p_chk = &chk;
- }
- if( p_chk->common.p_father )
- {
- if( p_chk->common.p_father->common.i_chunk_pos +
- __EVEN( p_chk->common.p_father->common.i_chunk_size ) + 8 <
- p_chk->common.i_chunk_pos +
- __EVEN( p_chk->common.i_chunk_size ) + 8 )
- {
- return VLC_EGENERIC;
- }
- }
- return stream_Seek( s, p_chk->common.i_chunk_pos +
- __EVEN( p_chk->common.i_chunk_size ) + 8 );
- }
- /****************************************************************************
- *
- * Functions to read chunks
- *
- ****************************************************************************/
- static int AVI_ChunkRead_list( stream_t *s, avi_chunk_t *p_container )
- {
- avi_chunk_t *p_chk;
- uint8_t *p_peek;
- vlc_bool_t b_seekable;
- if( p_container->common.i_chunk_size > 0 && p_container->common.i_chunk_size < 8 )
- {
- /* empty box */
- msg_Warn( (vlc_object_t*)s, "empty list chunk" );
- return VLC_EGENERIC;
- }
- if( stream_Peek( s, &p_peek, 12 ) < 12 )
- {
- msg_Warn( (vlc_object_t*)s, "cannot peek while reading list chunk" );
- return VLC_EGENERIC;
- }
- stream_Control( s, STREAM_CAN_FASTSEEK, &b_seekable );
- p_container->list.i_type = GetFOURCC( p_peek + 8 );
- if( p_container->common.i_chunk_fourcc == AVIFOURCC_LIST &&
- p_container->list.i_type == AVIFOURCC_movi )
- {
- msg_Dbg( (vlc_object_t*)s, "skipping movi chunk" );
- if( b_seekable )
- {
- return AVI_NextChunk( s, p_container );
- }
- return VLC_SUCCESS; /* point at begining of LIST-movi */
- }
- if( stream_Read( s, NULL, 12 ) != 12 )
- {
- msg_Warn( (vlc_object_t*)s, "cannot enter chunk" );
- return VLC_EGENERIC;
- }
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "found LIST chunk: '%4.4s'",
- (char*)&p_container->list.i_type );
- #endif
- msg_Dbg( (vlc_object_t*)s, "<list '%4.4s'>", (char*)&p_container->list.i_type );
- for( ; ; )
- {
- p_chk = malloc( sizeof( avi_chunk_t ) );
- memset( p_chk, 0, sizeof( avi_chunk_t ) );
- if( !p_container->common.p_first )
- {
- p_container->common.p_first = p_chk;
- }
- else
- {
- p_container->common.p_last->common.p_next = p_chk;
- }
- p_container->common.p_last = p_chk;
- if( AVI_ChunkRead( s, p_chk, p_container ) )
- {
- break;
- }
- if( p_chk->common.p_father->common.i_chunk_size > 0 &&
- ( stream_Tell( s ) >=
- (off_t)p_chk->common.p_father->common.i_chunk_pos +
- (off_t)__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
- {
- break;
- }
- /* If we can't seek then stop when we 've found LIST-movi */
- if( p_chk->common.i_chunk_fourcc == AVIFOURCC_LIST &&
- p_chk->list.i_type == AVIFOURCC_movi &&
- ( !b_seekable || p_chk->common.i_chunk_size == 0 ) )
- {
- break;
- }
- }
- msg_Dbg( (vlc_object_t*)s, "</list '%4.4s'>", (char*)&p_container->list.i_type );
- return VLC_SUCCESS;
- }
- #define AVI_READCHUNK_ENTER
- int64_t i_read = __EVEN(p_chk->common.i_chunk_size ) + 8;
- uint8_t *p_read, *p_buff;
- if( !( p_read = p_buff = malloc(i_read ) ) )
- {
- return VLC_EGENERIC;
- }
- i_read = stream_Read( s, p_read, i_read );
- if( i_read < (int64_t)__EVEN(p_chk->common.i_chunk_size ) + 8 )
- {
- return VLC_EGENERIC;
- }
- p_read += 8;
- i_read -= 8
- #define AVI_READCHUNK_EXIT( code )
- free( p_buff );
- if( i_read < 0 )
- {
- msg_Warn( (vlc_object_t*)s, "not enough data" );
- }
- return code
- #define AVI_READ1BYTE( i_byte )
- i_byte = *p_read;
- p_read++;
- i_read--
- #define AVI_READ2BYTES( i_word )
- i_word = GetWLE( p_read );
- p_read += 2;
- i_read -= 2
- #define AVI_READ4BYTES( i_dword )
- i_dword = GetDWLE( p_read );
- p_read += 4;
- i_read -= 4
- #define AVI_READ8BYTES( i_dword )
- i_dword = GetQWLE( p_read );
- p_read += 8;
- i_read -= 8
- #define AVI_READFOURCC( i_dword )
- i_dword = GetFOURCC( p_read );
- p_read += 4;
- i_read -= 4
- static int AVI_ChunkRead_avih( stream_t *s, avi_chunk_t *p_chk )
- {
- AVI_READCHUNK_ENTER;
- AVI_READ4BYTES( p_chk->avih.i_microsecperframe);
- AVI_READ4BYTES( p_chk->avih.i_maxbytespersec );
- AVI_READ4BYTES( p_chk->avih.i_reserved1 );
- AVI_READ4BYTES( p_chk->avih.i_flags );
- AVI_READ4BYTES( p_chk->avih.i_totalframes );
- AVI_READ4BYTES( p_chk->avih.i_initialframes );
- AVI_READ4BYTES( p_chk->avih.i_streams );
- AVI_READ4BYTES( p_chk->avih.i_suggestedbuffersize );
- AVI_READ4BYTES( p_chk->avih.i_width );
- AVI_READ4BYTES( p_chk->avih.i_height );
- AVI_READ4BYTES( p_chk->avih.i_scale );
- AVI_READ4BYTES( p_chk->avih.i_rate );
- AVI_READ4BYTES( p_chk->avih.i_start );
- AVI_READ4BYTES( p_chk->avih.i_length );
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "avih: streams:%d flags:%s%s%s%s %dx%d",
- p_chk->avih.i_streams,
- p_chk->avih.i_flags&AVIF_HASINDEX?" HAS_INDEX":"",
- p_chk->avih.i_flags&AVIF_MUSTUSEINDEX?" MUST_USE_INDEX":"",
- p_chk->avih.i_flags&AVIF_ISINTERLEAVED?" IS_INTERLEAVED":"",
- p_chk->avih.i_flags&AVIF_TRUSTCKTYPE?" TRUST_CKTYPE":"",
- p_chk->avih.i_width, p_chk->avih.i_height );
- #endif
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static int AVI_ChunkRead_strh( stream_t *s, avi_chunk_t *p_chk )
- {
- AVI_READCHUNK_ENTER;
- AVI_READFOURCC( p_chk->strh.i_type );
- AVI_READFOURCC( p_chk->strh.i_handler );
- AVI_READ4BYTES( p_chk->strh.i_flags );
- AVI_READ4BYTES( p_chk->strh.i_reserved1 );
- AVI_READ4BYTES( p_chk->strh.i_initialframes );
- AVI_READ4BYTES( p_chk->strh.i_scale );
- AVI_READ4BYTES( p_chk->strh.i_rate );
- AVI_READ4BYTES( p_chk->strh.i_start );
- AVI_READ4BYTES( p_chk->strh.i_length );
- AVI_READ4BYTES( p_chk->strh.i_suggestedbuffersize );
- AVI_READ4BYTES( p_chk->strh.i_quality );
- AVI_READ4BYTES( p_chk->strh.i_samplesize );
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "strh: type:%4.4s handler:0x%8.8x samplesize:%d %.2ffps",
- (char*)&p_chk->strh.i_type,
- p_chk->strh.i_handler,
- p_chk->strh.i_samplesize,
- ( p_chk->strh.i_scale ?
- (float)p_chk->strh.i_rate / (float)p_chk->strh.i_scale : -1) );
- #endif
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static int AVI_ChunkRead_strf( stream_t *s, avi_chunk_t *p_chk )
- {
- avi_chunk_t *p_strh;
- AVI_READCHUNK_ENTER;
- if( p_chk->common.p_father == NULL )
- {
- msg_Err( (vlc_object_t*)s, "malformed avi file" );
- AVI_READCHUNK_EXIT( VLC_EGENERIC );
- }
- if( !( p_strh = AVI_ChunkFind( p_chk->common.p_father, AVIFOURCC_strh, 0 ) ) )
- {
- msg_Err( (vlc_object_t*)s, "malformed avi file" );
- AVI_READCHUNK_EXIT( VLC_EGENERIC );
- }
- switch( p_strh->strh.i_type )
- {
- case( AVIFOURCC_auds ):
- p_chk->strf.auds.i_cat = AUDIO_ES;
- p_chk->strf.auds.p_wf = malloc( __MAX( p_chk->common.i_chunk_size, sizeof( WAVEFORMATEX ) ) );
- AVI_READ2BYTES( p_chk->strf.auds.p_wf->wFormatTag );
- AVI_READ2BYTES( p_chk->strf.auds.p_wf->nChannels );
- AVI_READ4BYTES( p_chk->strf.auds.p_wf->nSamplesPerSec );
- AVI_READ4BYTES( p_chk->strf.auds.p_wf->nAvgBytesPerSec );
- AVI_READ2BYTES( p_chk->strf.auds.p_wf->nBlockAlign );
- AVI_READ2BYTES( p_chk->strf.auds.p_wf->wBitsPerSample );
- if( p_chk->strf.auds.p_wf->wFormatTag != WAVE_FORMAT_PCM
- && p_chk->common.i_chunk_size > sizeof( WAVEFORMATEX ) )
- {
- AVI_READ2BYTES( p_chk->strf.auds.p_wf->cbSize );
- /* prevent segfault */
- if( p_chk->strf.auds.p_wf->cbSize >
- p_chk->common.i_chunk_size - sizeof( WAVEFORMATEX ) )
- {
- p_chk->strf.auds.p_wf->cbSize =
- p_chk->common.i_chunk_size - sizeof( WAVEFORMATEX );
- }
- if( p_chk->strf.auds.p_wf->wFormatTag == WAVE_FORMAT_EXTENSIBLE )
- {
- /* Found an extensible header atm almost nothing uses that. */
- msg_Warn( (vlc_object_t*)s, "WAVE_FORMAT_EXTENSIBLE or "
- "vorbis audio dectected: not supported" );
- }
- }
- else
- {
- p_chk->strf.auds.p_wf->cbSize = 0;
- }
- if( p_chk->strf.auds.p_wf->cbSize > 0 )
- {
- memcpy( &p_chk->strf.auds.p_wf[1] ,
- p_buff + 8 + sizeof( WAVEFORMATEX ), /* 8=fourrc+size */
- p_chk->strf.auds.p_wf->cbSize );
- }
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "strf: audio:0x%4.4x channels:%d %dHz %dbits/sample %dkb/s",
- p_chk->strf.auds.p_wf->wFormatTag,
- p_chk->strf.auds.p_wf->nChannels,
- p_chk->strf.auds.p_wf->nSamplesPerSec,
- p_chk->strf.auds.p_wf->wBitsPerSample,
- p_chk->strf.auds.p_wf->nAvgBytesPerSec * 8 / 1024 );
- #endif
- break;
- case( AVIFOURCC_vids ):
- p_strh->strh.i_samplesize = 0; /* XXX for ffmpeg avi file */
- p_chk->strf.vids.i_cat = VIDEO_ES;
- p_chk->strf.vids.p_bih = malloc( p_chk->common.i_chunk_size );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biSize );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biWidth );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biHeight );
- AVI_READ2BYTES( p_chk->strf.vids.p_bih->biPlanes );
- AVI_READ2BYTES( p_chk->strf.vids.p_bih->biBitCount );
- AVI_READFOURCC( p_chk->strf.vids.p_bih->biCompression );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biSizeImage );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biXPelsPerMeter );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biYPelsPerMeter );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biClrUsed );
- AVI_READ4BYTES( p_chk->strf.vids.p_bih->biClrImportant );
- if( p_chk->strf.vids.p_bih->biSize >
- p_chk->common.i_chunk_size )
- {
- p_chk->strf.vids.p_bih->biSize = p_chk->common.i_chunk_size;
- }
- if( p_chk->strf.vids.p_bih->biSize - sizeof(BITMAPINFOHEADER) > 0 )
- {
- memcpy( &p_chk->strf.vids.p_bih[1],
- p_buff + 8 + sizeof(BITMAPINFOHEADER), /* 8=fourrc+size */
- p_chk->strf.vids.p_bih->biSize -
- sizeof(BITMAPINFOHEADER) );
- }
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s,
- "strf: video:%4.4s %dx%d planes:%d %dbpp",
- (char*)&p_chk->strf.vids.p_bih->biCompression,
- p_chk->strf.vids.p_bih->biWidth,
- p_chk->strf.vids.p_bih->biHeight,
- p_chk->strf.vids.p_bih->biPlanes,
- p_chk->strf.vids.p_bih->biBitCount );
- #endif
- break;
- default:
- msg_Warn( (vlc_object_t*)s, "unknown stream type" );
- p_chk->strf.common.i_cat = UNKNOWN_ES;
- break;
- }
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static void AVI_ChunkFree_strf( avi_chunk_t *p_chk )
- {
- avi_chunk_strf_t *p_strf = (avi_chunk_strf_t*)p_chk;
- if( p_strf->common.i_cat == AUDIO_ES )
- {
- FREE( p_strf->auds.p_wf );
- }
- else if( p_strf->common.i_cat == VIDEO_ES )
- {
- FREE( p_strf->vids.p_bih );
- }
- }
- static int AVI_ChunkRead_strd( stream_t *s, avi_chunk_t *p_chk )
- {
- AVI_READCHUNK_ENTER;
- p_chk->strd.p_data = malloc( p_chk->common.i_chunk_size );
- memcpy( p_chk->strd.p_data,
- p_buff + 8,
- p_chk->common.i_chunk_size );
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static int AVI_ChunkRead_idx1( stream_t *s, avi_chunk_t *p_chk )
- {
- unsigned int i_count, i_index;
- AVI_READCHUNK_ENTER;
- i_count = __MIN( (int64_t)p_chk->common.i_chunk_size, i_read ) / 16;
- p_chk->idx1.i_entry_count = i_count;
- p_chk->idx1.i_entry_max = i_count;
- if( i_count > 0 )
- {
- p_chk->idx1.entry = calloc( i_count, sizeof( idx1_entry_t ) );
- for( i_index = 0; i_index < i_count ; i_index++ )
- {
- AVI_READFOURCC( p_chk->idx1.entry[i_index].i_fourcc );
- AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_flags );
- AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_pos );
- AVI_READ4BYTES( p_chk->idx1.entry[i_index].i_length );
- }
- }
- else
- {
- p_chk->idx1.entry = NULL;
- }
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s, "idx1: index entry:%d", i_count );
- #endif
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static void AVI_ChunkFree_idx1( avi_chunk_t *p_chk )
- {
- p_chk->idx1.i_entry_count = 0;
- p_chk->idx1.i_entry_max = 0;
- FREE( p_chk->idx1.entry )
- }
- static int AVI_ChunkRead_indx( stream_t *s, avi_chunk_t *p_chk )
- {
- unsigned int i_count, i;
- int32_t i_dummy;
- avi_chunk_indx_t *p_indx = (avi_chunk_indx_t*)p_chk;
- AVI_READCHUNK_ENTER;
- AVI_READ2BYTES( p_indx->i_longsperentry );
- AVI_READ1BYTE ( p_indx->i_indexsubtype );
- AVI_READ1BYTE ( p_indx->i_indextype );
- AVI_READ4BYTES( p_indx->i_entriesinuse );
- AVI_READ4BYTES( p_indx->i_id );
- p_indx->idx.std = NULL;
- p_indx->idx.field = NULL;
- p_indx->idx.super = NULL;
- if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS && p_indx->i_indexsubtype == 0 )
- {
- AVI_READ8BYTES( p_indx->i_baseoffset );
- AVI_READ4BYTES( i_dummy );
- i_count = __MIN( p_indx->i_entriesinuse, i_read / 8 );
- p_indx->i_entriesinuse = i_count;
- p_indx->idx.std = calloc( sizeof( indx_std_entry_t ), i_count );
- for( i = 0; i < i_count; i++ )
- {
- AVI_READ4BYTES( p_indx->idx.std[i].i_offset );
- AVI_READ4BYTES( p_indx->idx.std[i].i_size );
- }
- }
- else if( p_indx->i_indextype == AVI_INDEX_OF_CHUNKS && p_indx->i_indexsubtype == AVI_INDEX_2FIELD )
- {
- AVI_READ8BYTES( p_indx->i_baseoffset );
- AVI_READ4BYTES( i_dummy );
- i_count = __MIN( p_indx->i_entriesinuse, i_read / 12 );
- p_indx->i_entriesinuse = i_count;
- p_indx->idx.field = calloc( sizeof( indx_field_entry_t ), i_count );
- for( i = 0; i < i_count; i++ )
- {
- AVI_READ4BYTES( p_indx->idx.field[i].i_offset );
- AVI_READ4BYTES( p_indx->idx.field[i].i_size );
- AVI_READ4BYTES( p_indx->idx.field[i].i_offsetfield2 );
- }
- }
- else if( p_indx->i_indextype == AVI_INDEX_OF_INDEXES )
- {
- p_indx->i_baseoffset = 0;
- AVI_READ4BYTES( i_dummy );
- AVI_READ4BYTES( i_dummy );
- AVI_READ4BYTES( i_dummy );
- i_count = __MIN( p_indx->i_entriesinuse, i_read / 16 );
- p_indx->i_entriesinuse = i_count;
- p_indx->idx.super = calloc( sizeof( indx_super_entry_t ), i_count );
- for( i = 0; i < i_count; i++ )
- {
- AVI_READ8BYTES( p_indx->idx.super[i].i_offset );
- AVI_READ4BYTES( p_indx->idx.super[i].i_size );
- AVI_READ4BYTES( p_indx->idx.super[i].i_duration );
- }
- }
- else
- {
- msg_Warn( (vlc_object_t*)s, "unknow type/subtype index" );
- }
- #ifdef AVI_DEBUG
- 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 );
- #endif
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static void AVI_ChunkFree_indx( avi_chunk_t *p_chk )
- {
- avi_chunk_indx_t *p_indx = (avi_chunk_indx_t*)p_chk;
- FREE( p_indx->idx.std );
- FREE( p_indx->idx.field );
- FREE( p_indx->idx.super );
- }
- static struct
- {
- vlc_fourcc_t i_fourcc;
- char *psz_type;
- } AVI_strz_type[] =
- {
- { AVIFOURCC_IARL, "archive location" },
- { AVIFOURCC_IART, "artist" },
- { AVIFOURCC_ICMS, "commisioned" },
- { AVIFOURCC_ICMT, "comments" },
- { AVIFOURCC_ICOP, "copyright" },
- { AVIFOURCC_ICRD, "creation date" },
- { AVIFOURCC_ICRP, "cropped" },
- { AVIFOURCC_IDIM, "dimensions" },
- { AVIFOURCC_IDPI, "dots per inch" },
- { AVIFOURCC_IENG, "engineer" },
- { AVIFOURCC_IGNR, "genre" },
- { AVIFOURCC_IKEY, "keywords" },
- { AVIFOURCC_ILGT, "lightness" },
- { AVIFOURCC_IMED, "medium" },
- { AVIFOURCC_INAM, "name" },
- { AVIFOURCC_IPLT, "palette setting" },
- { AVIFOURCC_IPRD, "product" },
- { AVIFOURCC_ISBJ, "subject" },
- { AVIFOURCC_ISFT, "software" },
- { AVIFOURCC_ISHP, "sharpness" },
- { AVIFOURCC_ISRC, "source" },
- { AVIFOURCC_ISRF, "source form" },
- { AVIFOURCC_ITCH, "technician" },
- { AVIFOURCC_ISMP, "time code" },
- { AVIFOURCC_IDIT, "digitalization time" },
- { AVIFOURCC_strn, "stream name" },
- { 0, "???" }
- };
- static int AVI_ChunkRead_strz( stream_t *s, avi_chunk_t *p_chk )
- {
- int i_index;
- avi_chunk_STRING_t *p_strz = (avi_chunk_STRING_t*)p_chk;
- AVI_READCHUNK_ENTER;
- for( i_index = 0;; i_index++)
- {
- if( !AVI_strz_type[i_index].i_fourcc ||
- AVI_strz_type[i_index].i_fourcc == p_strz->i_chunk_fourcc )
- {
- break;
- }
- }
- p_strz->p_type = strdup( AVI_strz_type[i_index].psz_type );
- p_strz->p_str = malloc( i_read + 1);
- if( p_strz->i_chunk_size )
- {
- memcpy( p_strz->p_str, p_read, i_read );
- }
- p_strz->p_str[i_read] = 0;
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s, "%4.4s: %s : %s",
- (char*)&p_strz->i_chunk_fourcc, p_strz->p_type, p_strz->p_str);
- #endif
- AVI_READCHUNK_EXIT( VLC_SUCCESS );
- }
- static void AVI_ChunkFree_strz( avi_chunk_t *p_chk )
- {
- avi_chunk_STRING_t *p_strz = (avi_chunk_STRING_t*)p_chk;
- FREE( p_strz->p_type );
- FREE( p_strz->p_str );
- }
- static int AVI_ChunkRead_nothing( stream_t *s, avi_chunk_t *p_chk )
- {
- return AVI_NextChunk( s, p_chk );
- }
- static void AVI_ChunkFree_nothing( avi_chunk_t *p_chk )
- {
- }
- static struct
- {
- vlc_fourcc_t i_fourcc;
- int (*AVI_ChunkRead_function)( stream_t *s, avi_chunk_t *p_chk );
- void (*AVI_ChunkFree_function)( avi_chunk_t *p_chk );
- } AVI_Chunk_Function [] =
- {
- { AVIFOURCC_RIFF, AVI_ChunkRead_list, AVI_ChunkFree_nothing },
- { AVIFOURCC_LIST, AVI_ChunkRead_list, AVI_ChunkFree_nothing },
- { AVIFOURCC_avih, AVI_ChunkRead_avih, AVI_ChunkFree_nothing },
- { AVIFOURCC_strh, AVI_ChunkRead_strh, AVI_ChunkFree_nothing },
- { AVIFOURCC_strf, AVI_ChunkRead_strf, AVI_ChunkFree_strf },
- { AVIFOURCC_strd, AVI_ChunkRead_strd, AVI_ChunkFree_nothing },
- { AVIFOURCC_idx1, AVI_ChunkRead_idx1, AVI_ChunkFree_idx1 },
- { AVIFOURCC_indx, AVI_ChunkRead_indx, AVI_ChunkFree_indx },
- { AVIFOURCC_JUNK, AVI_ChunkRead_nothing, AVI_ChunkFree_nothing },
- { AVIFOURCC_IARL, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IARL, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IART, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ICMS, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ICMT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ICOP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ICRD, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ICRP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IDIM, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IDPI, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IENG, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IGNR, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IKEY, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ILGT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IMED, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_INAM, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IPLT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IPRD, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISBJ, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISFT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISHP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISRC, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISRF, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ITCH, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_ISMP, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_IDIT, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { AVIFOURCC_strn, AVI_ChunkRead_strz, AVI_ChunkFree_strz },
- { 0, NULL, NULL }
- };
- static int AVI_ChunkFunctionFind( vlc_fourcc_t i_fourcc )
- {
- unsigned int i_index;
- for( i_index = 0; ; i_index++ )
- {
- if( ( AVI_Chunk_Function[i_index].i_fourcc == i_fourcc )||
- ( AVI_Chunk_Function[i_index].i_fourcc == 0 ) )
- {
- return i_index;
- }
- }
- }
- int _AVI_ChunkRead( stream_t *s, avi_chunk_t *p_chk, avi_chunk_t *p_father )
- {
- int i_index;
- if( !p_chk )
- {
- return VLC_EGENERIC;
- }
- if( AVI_ChunkReadCommon( s, p_chk ) )
- {
- msg_Warn( (vlc_object_t*)s, "cannot read one chunk" );
- return VLC_EGENERIC;
- }
- if( p_chk->common.i_chunk_fourcc == VLC_FOURCC( 0, 0, 0, 0 ) )
- {
- msg_Warn( (vlc_object_t*)s, "found null fourcc chunk (corrupted file?)" );
- return VLC_EGENERIC;
- }
- p_chk->common.p_father = p_father;
- i_index = AVI_ChunkFunctionFind( p_chk->common.i_chunk_fourcc );
- if( AVI_Chunk_Function[i_index].AVI_ChunkRead_function )
- {
- return AVI_Chunk_Function[i_index].AVI_ChunkRead_function( s, p_chk );
- }
- else if( ((char*)&p_chk->common.i_chunk_fourcc)[0] == 'i' &&
- ((char*)&p_chk->common.i_chunk_fourcc)[1] == 'x' )
- {
- p_chk->common.i_chunk_fourcc = AVIFOURCC_indx;
- return AVI_ChunkRead_indx( s, p_chk );
- }
- msg_Warn( (vlc_object_t*)s, "unknown chunk (not loaded)" );
- return AVI_NextChunk( s, p_chk );
- }
- void _AVI_ChunkFree( stream_t *s,
- avi_chunk_t *p_chk )
- {
- int i_index;
- avi_chunk_t *p_child, *p_next;
- if( !p_chk )
- {
- return;
- }
- /* Free all child chunk */
- p_child = p_chk->common.p_first;
- while( p_child )
- {
- p_next = p_child->common.p_next;
- AVI_ChunkFree( s, p_child );
- free( p_child );
- p_child = p_next;
- }
- i_index = AVI_ChunkFunctionFind( p_chk->common.i_chunk_fourcc );
- if( AVI_Chunk_Function[i_index].AVI_ChunkFree_function )
- {
- #ifdef AVI_DEBUG
- msg_Dbg( (vlc_object_t*)s, "free chunk %4.4s",
- (char*)&p_chk->common.i_chunk_fourcc );
- #endif
- AVI_Chunk_Function[i_index].AVI_ChunkFree_function( p_chk);
- }
- else
- {
- msg_Warn( (vlc_object_t*)s, "unknown chunk (not unloaded)" );
- }
- p_chk->common.p_first = NULL;
- p_chk->common.p_last = NULL;
- return;
- }
- static void AVI_ChunkDumpDebug_level( vlc_object_t *p_obj,
- avi_chunk_t *p_chk, int i_level )
- {
- char str[1024];
- int i;
- avi_chunk_t *p_child;
- memset( str, ' ', sizeof( str ) );
- for( i = 1; i < i_level; i++ )
- {
- str[i * 5] = '|';
- }
- if( p_chk->common.i_chunk_fourcc == AVIFOURCC_RIFF||
- p_chk->common.i_chunk_fourcc == AVIFOURCC_LIST )
- {
- sprintf( str + i_level * 5,
- "%c %4.4s-%4.4s size:"I64Fu" pos:"I64Fu,
- i_level ? '+' : '*',
- (char*)&p_chk->common.i_chunk_fourcc,
- (char*)&p_chk->list.i_type,
- p_chk->common.i_chunk_size,
- p_chk->common.i_chunk_pos );
- }
- else
- {
- sprintf( str + i_level * 5,
- "+ %4.4s size:"I64Fu" pos:"I64Fu,
- (char*)&p_chk->common.i_chunk_fourcc,
- p_chk->common.i_chunk_size,
- p_chk->common.i_chunk_pos );
- }
- msg_Dbg( p_obj, "%s", str );
- p_child = p_chk->common.p_first;
- while( p_child )
- {
- AVI_ChunkDumpDebug_level( p_obj, p_child, i_level + 1 );
- p_child = p_child->common.p_next;
- }
- }
- int AVI_ChunkReadRoot( stream_t *s, avi_chunk_t *p_root )
- {
- avi_chunk_list_t *p_list = (avi_chunk_list_t*)p_root;
- avi_chunk_t *p_chk;
- vlc_bool_t b_seekable;
- stream_Control( s, STREAM_CAN_FASTSEEK, &b_seekable );
- p_list->i_chunk_pos = 0;
- p_list->i_chunk_size = stream_Size( s );
- p_list->i_chunk_fourcc = AVIFOURCC_LIST;
- p_list->p_father = NULL;
- p_list->p_next = NULL;
- p_list->p_first = NULL;
- p_list->p_last = NULL;
- p_list->i_type = VLC_FOURCC( 'r', 'o', 'o', 't' );
- for( ; ; )
- {
- p_chk = malloc( sizeof( avi_chunk_t ) );
- memset( p_chk, 0, sizeof( avi_chunk_t ) );
- if( !p_root->common.p_first )
- {
- p_root->common.p_first = p_chk;
- }
- else
- {
- p_root->common.p_last->common.p_next = p_chk;
- }
- p_root->common.p_last = p_chk;
- if( AVI_ChunkRead( s, p_chk, p_root ) ||
- ( stream_Tell( s ) >=
- (off_t)p_chk->common.p_father->common.i_chunk_pos +
- (off_t)__EVEN( p_chk->common.p_father->common.i_chunk_size ) ) )
- {
- break;
- }
- /* If we can't seek then stop when we 've found first RIFF-AVI */
- if( p_chk->common.i_chunk_fourcc == AVIFOURCC_RIFF &&
- p_chk->list.i_type == AVIFOURCC_AVI && !b_seekable )
- {
- break;
- }
- }
- AVI_ChunkDumpDebug_level( (vlc_object_t*)s, p_root, 0 );
- return VLC_SUCCESS;
- }
- void AVI_ChunkFreeRoot( stream_t *s,
- avi_chunk_t *p_chk )
- {
- AVI_ChunkFree( s, p_chk );
- }
- int _AVI_ChunkCount( avi_chunk_t *p_chk, vlc_fourcc_t i_fourcc )
- {
- int i_count;
- avi_chunk_t *p_child;
- if( !p_chk )
- {
- return 0;
- }
- i_count = 0;
- p_child = p_chk->common.p_first;
- while( p_child )
- {
- if( p_child->common.i_chunk_fourcc == i_fourcc ||
- ( p_child->common.i_chunk_fourcc == AVIFOURCC_LIST &&
- p_child->list.i_type == i_fourcc ) )
- {
- i_count++;
- }
- p_child = p_child->common.p_next;
- }
- return i_count;
- }
- void *_AVI_ChunkFind( avi_chunk_t *p_chk,
- vlc_fourcc_t i_fourcc, int i_number )
- {
- avi_chunk_t *p_child;
- if( !p_chk )
- {
- return NULL;
- }
- p_child = p_chk->common.p_first;
- while( p_child )
- {
- if( p_child->common.i_chunk_fourcc == i_fourcc ||
- ( p_child->common.i_chunk_fourcc == AVIFOURCC_LIST &&
- p_child->list.i_type == i_fourcc ) )
- {
- if( i_number == 0 )
- {
- /* We found it */
- return p_child;
- }
- i_number--;
- }
- p_child = p_child->common.p_next;
- }
- return NULL;
- }