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/*
* Windows Television ( WTV ) demuxer
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* Copyright ( c ) 2010 - 2011 Peter Ross < pross @ xvid . org >
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*
* This file is part of FFmpeg .
*
* FFmpeg is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2.1 of the License , or ( at your option ) any later version .
*
* FFmpeg 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
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
/**
* @ file
* Windows Television ( WTV ) demuxer
* @ author Peter Ross < pross @ xvid . org >
*/
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# include <inttypes.h>
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# include "libavutil/channel_layout.h"
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# include "libavutil/intreadwrite.h"
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# include "libavutil/intfloat.h"
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# include "libavutil/time_internal.h"
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# include "avformat.h"
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# include "internal.h"
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# include "wtv.h"
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# include "mpegts.h"
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/* Macros for formatting GUIDs */
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# define PRI_PRETTY_GUID \
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" %08 " PRIx32 " -%04 " PRIx16 " -%04 " PRIx16 " -%02x%02x%02x%02x%02x%02x%02x%02x "
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# define ARG_PRETTY_GUID(g) \
AV_RL32 ( g ) , AV_RL16 ( g + 4 ) , AV_RL16 ( g + 6 ) , g [ 8 ] , g [ 9 ] , g [ 10 ] , g [ 11 ] , g [ 12 ] , g [ 13 ] , g [ 14 ] , g [ 15 ]
# define LEN_PRETTY_GUID 34
/*
* File system routines
*/
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typedef struct WtvFile {
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AVIOContext * pb_filesystem ; /**< file system (AVFormatContext->pb) */
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int sector_bits ; /**< sector shift bits; used to convert sector number into pb_filesystem offset */
uint32_t * sectors ; /**< file allocation table */
int nb_sectors ; /**< number of sectors */
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int error ;
int64_t position ;
int64_t length ;
} WtvFile ;
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static int64_t seek_by_sector ( AVIOContext * pb , int64_t sector , int64_t offset )
{
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return avio_seek ( pb , ( sector < < WTV_SECTOR_BITS ) + offset , SEEK_SET ) ;
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}
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/**
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* @ return bytes read , AVERROR_EOF on end of file , or < 0 on error
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*/
static int wtvfile_read_packet ( void * opaque , uint8_t * buf , int buf_size )
{
WtvFile * wf = opaque ;
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AVIOContext * pb = wf - > pb_filesystem ;
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int nread = 0 ;
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if ( wf - > error | | pb - > error )
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return - 1 ;
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if ( wf - > position > = wf - > length | | avio_feof ( pb ) )
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return AVERROR_EOF ;
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buf_size = FFMIN ( buf_size , wf - > length - wf - > position ) ;
while ( nread < buf_size ) {
int n ;
int remaining_in_sector = ( 1 < < wf - > sector_bits ) - ( wf - > position & ( ( 1 < < wf - > sector_bits ) - 1 ) ) ;
int read_request = FFMIN ( buf_size - nread , remaining_in_sector ) ;
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n = avio_read ( pb , buf , read_request ) ;
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if ( n < = 0 )
break ;
nread + = n ;
buf + = n ;
wf - > position + = n ;
if ( n = = remaining_in_sector ) {
int i = wf - > position > > wf - > sector_bits ;
if ( i > = wf - > nb_sectors | |
( wf - > sectors [ i ] ! = wf - > sectors [ i - 1 ] + ( 1 < < ( wf - > sector_bits - WTV_SECTOR_BITS ) ) & &
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seek_by_sector ( pb , wf - > sectors [ i ] , 0 ) < 0 ) ) {
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wf - > error = 1 ;
break ;
}
}
}
return nread ;
}
/**
* @ return position ( or file length )
*/
static int64_t wtvfile_seek ( void * opaque , int64_t offset , int whence )
{
WtvFile * wf = opaque ;
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AVIOContext * pb = wf - > pb_filesystem ;
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if ( whence = = AVSEEK_SIZE )
return wf - > length ;
else if ( whence = = SEEK_CUR )
offset = wf - > position + offset ;
else if ( whence = = SEEK_END )
offset = wf - > length ;
wf - > error = offset < 0 | | offset > = wf - > length | |
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seek_by_sector ( pb , wf - > sectors [ offset > > wf - > sector_bits ] ,
offset & ( ( 1 < < wf - > sector_bits ) - 1 ) ) < 0 ;
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wf - > position = offset ;
return offset ;
}
/**
* read non - zero integers ( le32 ) from input stream
* @ param pb
* @ param [ out ] data destination
* @ param count maximum number of integers to read
* @ return total number of integers read
*/
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static int read_ints ( AVIOContext * pb , uint32_t * data , int count )
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{
int i , total = 0 ;
for ( i = 0 ; i < count ; i + + ) {
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if ( ( data [ total ] = avio_rl32 ( pb ) ) )
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total + + ;
}
return total ;
}
/**
* Open file
* @ param first_sector First sector
* @ param length Length of file ( bytes )
* @ param depth File allocation table depth
* @ return NULL on error
*/
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static AVIOContext * wtvfile_open_sector ( int first_sector , uint64_t length , int depth , AVFormatContext * s )
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{
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AVIOContext * pb ;
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WtvFile * wf ;
uint8_t * buffer ;
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int64_t size ;
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if ( seek_by_sector ( s - > pb , first_sector , 0 ) < 0 )
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return NULL ;
wf = av_mallocz ( sizeof ( WtvFile ) ) ;
if ( ! wf )
return NULL ;
if ( depth = = 0 ) {
wf - > sectors = av_malloc ( sizeof ( uint32_t ) ) ;
if ( ! wf - > sectors ) {
av_free ( wf ) ;
return NULL ;
}
wf - > sectors [ 0 ] = first_sector ;
wf - > nb_sectors = 1 ;
} else if ( depth = = 1 ) {
wf - > sectors = av_malloc ( WTV_SECTOR_SIZE ) ;
if ( ! wf - > sectors ) {
av_free ( wf ) ;
return NULL ;
}
wf - > nb_sectors = read_ints ( s - > pb , wf - > sectors , WTV_SECTOR_SIZE / 4 ) ;
} else if ( depth = = 2 ) {
uint32_t sectors1 [ WTV_SECTOR_SIZE / 4 ] ;
int nb_sectors1 = read_ints ( s - > pb , sectors1 , WTV_SECTOR_SIZE / 4 ) ;
int i ;
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wf - > sectors = av_malloc_array ( nb_sectors1 , 1 < < WTV_SECTOR_BITS ) ;
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if ( ! wf - > sectors ) {
av_free ( wf ) ;
return NULL ;
}
wf - > nb_sectors = 0 ;
for ( i = 0 ; i < nb_sectors1 ; i + + ) {
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if ( seek_by_sector ( s - > pb , sectors1 [ i ] , 0 ) < 0 )
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break ;
wf - > nb_sectors + = read_ints ( s - > pb , wf - > sectors + i * WTV_SECTOR_SIZE / 4 , WTV_SECTOR_SIZE / 4 ) ;
}
} else {
av_log ( s , AV_LOG_ERROR , " unsupported file allocation table depth (0x%x) \n " , depth ) ;
av_free ( wf ) ;
return NULL ;
}
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wf - > sector_bits = length & ( 1ULL < < 63 ) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS ;
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if ( ! wf - > nb_sectors ) {
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av_freep ( & wf - > sectors ) ;
av_freep ( & wf ) ;
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return NULL ;
}
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size = avio_size ( s - > pb ) ;
if ( size > = 0 & & ( int64_t ) wf - > sectors [ wf - > nb_sectors - 1 ] < < WTV_SECTOR_BITS > size )
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av_log ( s , AV_LOG_WARNING , " truncated file \n " ) ;
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/* check length */
length & = 0xFFFFFFFFFFFF ;
if ( length > ( ( int64_t ) wf - > nb_sectors < < wf - > sector_bits ) ) {
av_log ( s , AV_LOG_WARNING , " reported file length (0x% " PRIx64 " ) exceeds number of available sectors (0x% " PRIx64 " ) \n " , length , ( int64_t ) wf - > nb_sectors < < wf - > sector_bits ) ;
length = ( int64_t ) wf - > nb_sectors < < wf - > sector_bits ;
}
wf - > length = length ;
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/* seek to initial sector */
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wf - > position = 0 ;
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if ( seek_by_sector ( s - > pb , wf - > sectors [ 0 ] , 0 ) < 0 ) {
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av_freep ( & wf - > sectors ) ;
av_freep ( & wf ) ;
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return NULL ;
}
wf - > pb_filesystem = s - > pb ;
buffer = av_malloc ( 1 < < wf - > sector_bits ) ;
if ( ! buffer ) {
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av_freep ( & wf - > sectors ) ;
av_freep ( & wf ) ;
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return NULL ;
}
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pb = avio_alloc_context ( buffer , 1 < < wf - > sector_bits , 0 , wf ,
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wtvfile_read_packet , NULL , wtvfile_seek ) ;
if ( ! pb ) {
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av_freep ( & buffer ) ;
av_freep ( & wf - > sectors ) ;
av_freep ( & wf ) ;
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}
return pb ;
}
/**
* Open file using filename
* @ param [ in ] buf directory buffer
* @ param buf_size directory buffer size
* @ param [ in ] filename
* @ param filename_size size of filename
* @ return NULL on error
*/
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static AVIOContext * wtvfile_open2 ( AVFormatContext * s , const uint8_t * buf , int buf_size , const uint8_t * filename , int filename_size )
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{
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const uint8_t * buf_end = buf + buf_size ;
while ( buf + 48 < = buf_end ) {
int dir_length , name_size , first_sector , depth ;
uint64_t file_length ;
const uint8_t * name ;
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if ( ff_guidcmp ( buf , ff_dir_entry_guid ) ) {
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av_log ( s , AV_LOG_ERROR , " unknown guid " FF_PRI_GUID " , expected dir_entry_guid; "
" remaining directory entries ignored \n " , FF_ARG_GUID ( buf ) ) ;
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break ;
}
dir_length = AV_RL16 ( buf + 16 ) ;
file_length = AV_RL64 ( buf + 24 ) ;
name_size = 2 * AV_RL32 ( buf + 32 ) ;
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if ( name_size < 0 ) {
av_log ( s , AV_LOG_ERROR ,
" bad filename length, remaining directory entries ignored \n " ) ;
break ;
}
if ( 48 + ( int64_t ) name_size > buf_end - buf ) {
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av_log ( s , AV_LOG_ERROR , " filename exceeds buffer size; remaining directory entries ignored \n " ) ;
break ;
}
first_sector = AV_RL32 ( buf + 40 + name_size ) ;
depth = AV_RL32 ( buf + 44 + name_size ) ;
/* compare file name; test optional null terminator */
name = buf + 40 ;
if ( name_size > = filename_size & &
! memcmp ( name , filename , filename_size ) & &
( name_size < filename_size + 2 | | ! AV_RN16 ( name + filename_size ) ) )
return wtvfile_open_sector ( first_sector , file_length , depth , s ) ;
buf + = dir_length ;
}
return 0 ;
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}
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# define wtvfile_open(s, buf, buf_size, filename) \
wtvfile_open2 ( s , buf , buf_size , filename , sizeof ( filename ) )
/**
* Close file opened with wtvfile_open_sector ( ) , or wtv_open ( )
*/
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static void wtvfile_close ( AVIOContext * pb )
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{
WtvFile * wf = pb - > opaque ;
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av_freep ( & wf - > sectors ) ;
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av_freep ( & pb - > opaque ) ;
av_freep ( & pb - > buffer ) ;
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avio_context_free ( & pb ) ;
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}
/*
* Main demuxer
*/
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typedef struct WtvStream {
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int seen_data ;
} WtvStream ;
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typedef struct WtvContext {
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AVIOContext * pb ; /**< timeline file */
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int64_t epoch ;
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int64_t pts ; /**< pts for next data chunk */
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int64_t last_valid_pts ; /**< latest valid pts, used for interactive seeking */
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/* maintain private seek index, as the AVIndexEntry->pos is relative to the
start of the ' timeline ' file , not the file system ( AVFormatContext - > pb ) */
AVIndexEntry * index_entries ;
int nb_index_entries ;
unsigned int index_entries_allocated_size ;
} WtvContext ;
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/* WTV GUIDs */
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static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
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{ 0x48 , 0xC0 , 0xCE , 0x5D , 0xB9 , 0xD0 , 0x63 , 0x41 , 0x87 , 0x2C , 0x4F , 0x32 , 0x22 , 0x3B , 0xE8 , 0x8A } ;
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static const ff_asf_guid EVENTID_LanguageSpanningEvent =
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{ 0x6D , 0x66 , 0x92 , 0xE2 , 0x02 , 0x9C , 0x8D , 0x44 , 0xAA , 0x8D , 0x78 , 0x1A , 0x93 , 0xFD , 0xC3 , 0x95 } ;
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static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent =
{ 0x1C , 0xD4 , 0x7B , 0x10 , 0xDA , 0xA6 , 0x91 , 0x46 , 0x83 , 0x69 , 0x11 , 0xB2 , 0xCD , 0xAA , 0x28 , 0x8E } ;
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
{ 0xE6 , 0xA2 , 0xB4 , 0x3A , 0x47 , 0x42 , 0x34 , 0x4B , 0x89 , 0x6C , 0x30 , 0xAF , 0xA5 , 0xD2 , 0x1C , 0x24 } ;
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
{ 0xD9 , 0x79 , 0xE7 , 0xEf , 0xF0 , 0x97 , 0x86 , 0x47 , 0x80 , 0x0D , 0x95 , 0xCF , 0x50 , 0x5D , 0xDC , 0x66 } ;
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static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
{ 0xC4 , 0xE1 , 0xD4 , 0x4B , 0xA1 , 0x90 , 0x09 , 0x41 , 0x82 , 0x36 , 0x27 , 0xF0 , 0x0E , 0x7D , 0xCC , 0x5B } ;
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static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
{ 0x68 , 0xAB , 0xF1 , 0xCA , 0x53 , 0xE1 , 0x41 , 0x4D , 0xA6 , 0xB3 , 0xA7 , 0xC9 , 0x98 , 0xDB , 0x75 , 0xEE } ;
static const ff_asf_guid EVENTID_TeletextSpanningEvent =
{ 0x50 , 0xD9 , 0x99 , 0x95 , 0x33 , 0x5F , 0x17 , 0x46 , 0xAF , 0x7C , 0x1E , 0x54 , 0xB5 , 0x10 , 0xDA , 0xA3 } ;
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static const ff_asf_guid EVENTID_AudioTypeSpanningEvent =
{ 0xBE , 0xBF , 0x1C , 0x50 , 0x49 , 0xB8 , 0xCE , 0x42 , 0x9B , 0xE9 , 0x3D , 0xB8 , 0x69 , 0xFB , 0x82 , 0xB3 } ;
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/* Windows media GUIDs */
/* Media types */
static const ff_asf_guid mediasubtype_mpeg1payload =
{ 0x81 , 0xEB , 0x36 , 0xE4 , 0x4F , 0x52 , 0xCE , 0x11 , 0x9F , 0x53 , 0x00 , 0x20 , 0xAF , 0x0B , 0xA7 , 0x70 } ;
static const ff_asf_guid mediatype_mpeg2_sections =
{ 0x6C , 0x17 , 0x5F , 0x45 , 0x06 , 0x4B , 0xCE , 0x47 , 0x9A , 0xEF , 0x8C , 0xAE , 0xF7 , 0x3D , 0xF7 , 0xB5 } ;
static const ff_asf_guid mediatype_mpeg2_pes =
{ 0x20 , 0x80 , 0x6D , 0xE0 , 0x46 , 0xDB , 0xCF , 0x11 , 0xB4 , 0xD1 , 0x00 , 0x80 , 0x5F , 0x6C , 0xBB , 0xEA } ;
static const ff_asf_guid mediatype_mstvcaption =
{ 0x89 , 0x8A , 0x8B , 0xB8 , 0x49 , 0xB0 , 0x80 , 0x4C , 0xAD , 0xCF , 0x58 , 0x98 , 0x98 , 0x5E , 0x22 , 0xC1 } ;
/* Media subtypes */
static const ff_asf_guid mediasubtype_dvb_subtitle =
{ 0xC3 , 0xCB , 0xFF , 0x34 , 0xB3 , 0xD5 , 0x71 , 0x41 , 0x90 , 0x02 , 0xD4 , 0xC6 , 0x03 , 0x01 , 0x69 , 0x7F } ;
static const ff_asf_guid mediasubtype_teletext =
{ 0xE3 , 0x76 , 0x2A , 0xF7 , 0x0A , 0xEB , 0xD0 , 0x11 , 0xAC , 0xE4 , 0x00 , 0x00 , 0xC0 , 0xCC , 0x16 , 0xBA } ;
static const ff_asf_guid mediasubtype_dtvccdata =
{ 0xAA , 0xDD , 0x2A , 0xF5 , 0xF0 , 0x36 , 0xF5 , 0x43 , 0x95 , 0xEA , 0x6D , 0x86 , 0x64 , 0x84 , 0x26 , 0x2A } ;
static const ff_asf_guid mediasubtype_mpeg2_sections =
{ 0x79 , 0x85 , 0x9F , 0x4A , 0xF8 , 0x6B , 0x92 , 0x43 , 0x8A , 0x6D , 0xD2 , 0xDD , 0x09 , 0xFA , 0x78 , 0x61 } ;
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static int read_probe ( const AVProbeData * p )
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{
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return ff_guidcmp ( p - > buf , ff_wtv_guid ) ? 0 : AVPROBE_SCORE_MAX ;
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}
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/**
* Convert win32 FILETIME to ISO - 8601 string
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* @ return < 0 on error
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*/
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static int filetime_to_iso8601 ( char * buf , int buf_size , int64_t value )
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{
time_t t = ( value / 10000000LL ) - 11644473600LL ;
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struct tm tmbuf ;
struct tm * tm = gmtime_r ( & t , & tmbuf ) ;
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if ( ! tm )
return - 1 ;
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if ( ! strftime ( buf , buf_size , " %Y-%m-%d %H:%M:%S " , tm ) )
return - 1 ;
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return 0 ;
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}
/**
* Convert crazy time ( 100 ns since 1 Jan 0001 ) to ISO - 8601 string
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* @ return < 0 on error
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*/
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static int crazytime_to_iso8601 ( char * buf , int buf_size , int64_t value )
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{
time_t t = ( value / 10000000LL ) - 719162LL * 86400LL ;
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struct tm tmbuf ;
struct tm * tm = gmtime_r ( & t , & tmbuf ) ;
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if ( ! tm )
return - 1 ;
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if ( ! strftime ( buf , buf_size , " %Y-%m-%d %H:%M:%S " , tm ) )
return - 1 ;
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return 0 ;
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}
/**
* Convert OLE DATE to ISO - 8601 string
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* @ return < 0 on error
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*/
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static int oledate_to_iso8601 ( char * buf , int buf_size , int64_t value )
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{
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time_t t = ( av_int2double ( value ) - 25569.0 ) * 86400 ;
2014-10-24 10:46:36 +03:00
struct tm tmbuf ;
2014-10-26 03:38:26 +02:00
struct tm * tm = gmtime_r ( & t , & tmbuf ) ;
2014-10-26 02:21:42 +02:00
if ( ! tm )
2011-05-08 21:13:59 +03:00
return - 1 ;
2014-10-26 03:06:40 +02:00
if ( ! strftime ( buf , buf_size , " %Y-%m-%d %H:%M:%S " , tm ) )
return - 1 ;
2011-05-08 21:13:59 +03:00
return 0 ;
2011-01-23 03:58:59 +02:00
}
2011-02-20 12:04:12 +02:00
static void get_attachment ( AVFormatContext * s , AVIOContext * pb , int length )
2011-01-23 03:58:59 +02:00
{
char mime [ 1024 ] ;
char description [ 1024 ] ;
unsigned int filesize ;
AVStream * st ;
2013-01-06 06:15:24 +03:00
int ret ;
2011-03-03 21:11:45 +02:00
int64_t pos = avio_tell ( pb ) ;
2011-01-23 03:58:59 +02:00
avio_get_str16le ( pb , INT_MAX , mime , sizeof ( mime ) ) ;
if ( strcmp ( mime , " image/jpeg " ) )
goto done ;
2011-02-21 17:43:01 +02:00
avio_r8 ( pb ) ;
2011-01-23 03:58:59 +02:00
avio_get_str16le ( pb , INT_MAX , description , sizeof ( description ) ) ;
2011-02-21 17:43:01 +02:00
filesize = avio_rl32 ( pb ) ;
2011-01-23 03:58:59 +02:00
if ( ! filesize )
goto done ;
2011-10-20 03:23:36 +03:00
st = avformat_new_stream ( s , NULL ) ;
2011-01-23 03:58:59 +02:00
if ( ! st )
goto done ;
2011-06-13 20:02:50 +03:00
av_dict_set ( & st - > metadata , " title " , description , 0 ) ;
2016-04-10 21:58:15 +02:00
st - > codecpar - > codec_type = AVMEDIA_TYPE_VIDEO ;
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_id = AV_CODEC_ID_MJPEG ;
2013-07-07 12:48:05 +03:00
st - > id = - 1 ;
2013-01-06 06:15:24 +03:00
ret = av_get_packet ( pb , & st - > attached_pic , filesize ) ;
if ( ret < 0 )
2011-01-23 03:58:59 +02:00
goto done ;
2013-01-06 06:15:24 +03:00
st - > attached_pic . stream_index = st - > index ;
st - > attached_pic . flags | = AV_PKT_FLAG_KEY ;
st - > disposition | = AV_DISPOSITION_ATTACHED_PIC ;
2011-01-23 03:58:59 +02:00
done :
2011-02-28 15:57:54 +02:00
avio_seek ( pb , pos + length , SEEK_SET ) ;
2011-01-23 03:58:59 +02:00
}
2011-02-20 12:04:12 +02:00
static void get_tag ( AVFormatContext * s , AVIOContext * pb , const char * key , int type , int length )
2011-01-23 03:58:59 +02:00
{
2013-01-07 17:48:13 +03:00
int buf_size ;
char * buf ;
2011-01-23 03:58:59 +02:00
2013-01-06 06:15:25 +03:00
if ( ! strcmp ( key , " WM/MediaThumbType " ) ) {
avio_skip ( pb , length ) ;
return ;
2013-01-07 17:48:13 +03:00
}
buf_size = FFMAX ( 2 * length , LEN_PRETTY_GUID ) + 1 ;
buf = av_malloc ( buf_size ) ;
if ( ! buf )
return ;
if ( type = = 0 & & length = = 4 ) {
2014-03-10 17:35:59 +03:00
snprintf ( buf , buf_size , " %u " , avio_rl32 ( pb ) ) ;
2011-01-23 03:58:59 +02:00
} else if ( type = = 1 ) {
avio_get_str16le ( pb , length , buf , buf_size ) ;
if ( ! strlen ( buf ) ) {
av_free ( buf ) ;
return ;
}
} else if ( type = = 3 & & length = = 4 ) {
2011-02-21 17:43:01 +02:00
strcpy ( buf , avio_rl32 ( pb ) ? " true " : " false " ) ;
2011-01-23 03:58:59 +02:00
} else if ( type = = 4 & & length = = 8 ) {
2011-02-21 17:43:01 +02:00
int64_t num = avio_rl64 ( pb ) ;
2011-01-23 03:58:59 +02:00
if ( ! strcmp ( key , " WM/EncodingTime " ) | |
2012-07-02 09:17:40 +03:00
! strcmp ( key , " WM/MediaOriginalBroadcastDateTime " ) ) {
2012-07-02 03:28:31 +03:00
if ( filetime_to_iso8601 ( buf , buf_size , num ) < 0 ) {
av_free ( buf ) ;
return ;
}
2012-07-02 09:17:40 +03:00
} else if ( ! strcmp ( key , " WM/WMRVEncodeTime " ) | |
! strcmp ( key , " WM/WMRVEndTime " ) ) {
2012-07-02 03:28:31 +03:00
if ( crazytime_to_iso8601 ( buf , buf_size , num ) < 0 ) {
av_free ( buf ) ;
return ;
}
2012-07-02 09:17:40 +03:00
} else if ( ! strcmp ( key , " WM/WMRVExpirationDate " ) ) {
2011-05-08 21:13:59 +03:00
if ( oledate_to_iso8601 ( buf , buf_size , num ) < 0 ) {
av_free ( buf ) ;
return ;
}
} else if ( ! strcmp ( key , " WM/WMRVBitrate " ) )
2012-01-03 02:28:08 +03:00
snprintf ( buf , buf_size , " %f " , av_int2double ( num ) ) ;
2011-01-23 03:58:59 +02:00
else
snprintf ( buf , buf_size , " % " PRIi64 , num ) ;
} else if ( type = = 5 & & length = = 2 ) {
2013-10-27 20:05:19 +03:00
snprintf ( buf , buf_size , " %u " , avio_rl16 ( pb ) ) ;
2011-01-23 03:58:59 +02:00
} else if ( type = = 6 & & length = = 16 ) {
ff_asf_guid guid ;
2011-02-21 17:43:01 +02:00
avio_read ( pb , guid , 16 ) ;
2011-01-23 03:58:59 +02:00
snprintf ( buf , buf_size , PRI_PRETTY_GUID , ARG_PRETTY_GUID ( guid ) ) ;
} else if ( type = = 2 & & ! strcmp ( key , " WM/Picture " ) ) {
get_attachment ( s , pb , length ) ;
av_freep ( & buf ) ;
return ;
} else {
av_freep ( & buf ) ;
av_log ( s , AV_LOG_WARNING , " unsupported metadata entry; key:%s, type:%d, length:0x%x \n " , key , type , length ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , length ) ;
2011-01-23 03:58:59 +02:00
return ;
}
2011-06-13 20:02:50 +03:00
av_dict_set ( & s - > metadata , key , buf , 0 ) ;
2011-01-23 03:58:59 +02:00
av_freep ( & buf ) ;
}
/**
* Parse metadata entries
*/
2011-02-20 12:04:12 +02:00
static void parse_legacy_attrib ( AVFormatContext * s , AVIOContext * pb )
2011-01-23 03:58:59 +02:00
{
ff_asf_guid guid ;
int length , type ;
2014-08-07 23:12:41 +03:00
while ( ! avio_feof ( pb ) ) {
2011-01-23 03:58:59 +02:00
char key [ 1024 ] ;
ff_get_guid ( pb , & guid ) ;
2011-02-21 17:43:01 +02:00
type = avio_rl32 ( pb ) ;
length = avio_rl32 ( pb ) ;
2011-01-23 03:58:59 +02:00
if ( ! length )
break ;
2011-08-23 16:40:58 +03:00
if ( ff_guidcmp ( & guid , ff_metadata_guid ) ) {
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown guid " FF_PRI_GUID " , expected metadata_guid; "
" remaining metadata entries ignored \n " , FF_ARG_GUID ( guid ) ) ;
2011-01-23 03:58:59 +02:00
break ;
}
avio_get_str16le ( pb , INT_MAX , key , sizeof ( key ) ) ;
get_tag ( s , pb , key , type , length ) ;
}
ff_metadata_conv ( & s - > metadata , NULL , ff_asf_metadata_conv ) ;
}
2010-12-26 03:28:25 +02:00
/**
* parse VIDEOINFOHEADER2 structure
* @ return bytes consumed
*/
static int parse_videoinfoheader2 ( AVFormatContext * s , AVStream * st )
{
2011-01-23 03:58:59 +02:00
WtvContext * wtv = s - > priv_data ;
2011-02-20 12:04:12 +02:00
AVIOContext * pb = wtv - > pb ;
2010-12-26 03:28:25 +02:00
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 72 ) ; // picture aspect ratio is unreliable
2016-04-10 21:58:15 +02:00
st - > codecpar - > codec_tag = ff_get_bmp_header ( pb , st , NULL ) ;
2010-12-26 03:28:25 +02:00
return 72 + 40 ;
}
/**
* Parse MPEG1WAVEFORMATEX extradata structure
*/
static void parse_mpeg1waveformatex ( AVStream * st )
{
/* fwHeadLayer */
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
switch ( AV_RL16 ( st - > codecpar - > extradata ) ) {
case 0x0001 : st - > codecpar - > codec_id = AV_CODEC_ID_MP1 ; break ;
case 0x0002 : st - > codecpar - > codec_id = AV_CODEC_ID_MP2 ; break ;
case 0x0004 : st - > codecpar - > codec_id = AV_CODEC_ID_MP3 ; break ;
2010-12-26 03:28:25 +02:00
}
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > bit_rate = AV_RL32 ( st - > codecpar - > extradata + 2 ) ; /* dwHeadBitrate */
2010-12-26 03:28:25 +02:00
/* dwHeadMode */
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
switch ( AV_RL16 ( st - > codecpar - > extradata + 6 ) ) {
2012-11-13 13:09:38 +03:00
case 1 :
case 2 :
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
case 4 : st - > codecpar - > channels = 2 ;
st - > codecpar - > channel_layout = AV_CH_LAYOUT_STEREO ;
2012-11-13 13:09:38 +03:00
break ;
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
case 8 : st - > codecpar - > channels = 1 ;
st - > codecpar - > channel_layout = AV_CH_LAYOUT_MONO ;
2012-11-13 13:09:38 +03:00
break ;
2010-12-26 03:28:25 +02:00
}
}
2011-01-04 13:38:29 +02:00
/**
* Initialise stream
* @ param st Stream to initialise , or NULL to create and initialise new stream
* @ return NULL on error
*/
static AVStream * new_stream ( AVFormatContext * s , AVStream * st , int sid , int codec_type )
2010-12-26 03:28:25 +02:00
{
2011-01-04 13:38:29 +02:00
if ( st ) {
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
if ( st - > codecpar - > extradata ) {
av_freep ( & st - > codecpar - > extradata ) ;
st - > codecpar - > extradata_size = 0 ;
2011-01-04 13:38:29 +02:00
}
} else {
2011-01-09 04:35:06 +02:00
WtvStream * wst = av_mallocz ( sizeof ( WtvStream ) ) ;
if ( ! wst )
return NULL ;
2011-10-20 03:23:36 +03:00
st = avformat_new_stream ( s , NULL ) ;
2012-10-13 03:37:47 +03:00
if ( ! st ) {
av_free ( wst ) ;
2011-01-04 13:38:29 +02:00
return NULL ;
2012-10-13 03:37:47 +03:00
}
2011-10-20 03:23:36 +03:00
st - > id = sid ;
2011-01-09 04:35:06 +02:00
st - > priv_data = wst ;
2011-01-04 13:38:29 +02:00
}
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_type = codec_type ;
2010-12-26 03:28:25 +02:00
st - > need_parsing = AVSTREAM_PARSE_FULL ;
2011-12-03 02:45:46 +03:00
avpriv_set_pts_info ( st , 64 , 1 , 10000000 ) ;
2010-12-26 03:28:25 +02:00
return st ;
}
/**
2011-01-04 13:38:29 +02:00
* parse Media Type structure and populate stream
* @ param st Stream , or NULL to create new stream
2010-12-26 03:28:25 +02:00
* @ param mediatype Mediatype GUID
* @ param subtype Subtype GUID
* @ param formattype Format GUID
* @ param size Size of format buffer
* @ return NULL on error
*/
2011-01-04 13:38:29 +02:00
static AVStream * parse_media_type ( AVFormatContext * s , AVStream * st , int sid ,
2010-12-26 03:28:25 +02:00
ff_asf_guid mediatype , ff_asf_guid subtype ,
2014-04-04 14:07:36 +03:00
ff_asf_guid formattype , uint64_t size )
2010-12-26 03:28:25 +02:00
{
2011-01-23 03:58:59 +02:00
WtvContext * wtv = s - > priv_data ;
2011-02-20 12:04:12 +02:00
AVIOContext * pb = wtv - > pb ;
2011-08-23 16:40:58 +03:00
if ( ! ff_guidcmp ( subtype , ff_mediasubtype_cpfilters_processed ) & &
! ff_guidcmp ( formattype , ff_format_cpfilters_processed ) ) {
2010-12-26 03:28:25 +02:00
ff_asf_guid actual_subtype ;
ff_asf_guid actual_formattype ;
if ( size < 32 ) {
av_log ( s , AV_LOG_WARNING , " format buffer size underflow \n " ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2010-12-26 03:28:25 +02:00
return NULL ;
}
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size - 32 ) ;
2010-12-26 03:28:25 +02:00
ff_get_guid ( pb , & actual_subtype ) ;
ff_get_guid ( pb , & actual_formattype ) ;
2011-02-28 15:57:54 +02:00
avio_seek ( pb , - size , SEEK_CUR ) ;
2010-12-26 03:28:25 +02:00
2011-01-04 13:38:29 +02:00
st = parse_media_type ( s , st , sid , mediatype , actual_subtype , actual_formattype , size - 32 ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 32 ) ;
2010-12-26 03:28:25 +02:00
return st ;
2011-05-01 22:13:18 +03:00
} else if ( ! ff_guidcmp ( mediatype , ff_mediatype_audio ) ) {
2011-01-04 13:38:29 +02:00
st = new_stream ( s , st , sid , AVMEDIA_TYPE_AUDIO ) ;
2010-12-26 03:28:25 +02:00
if ( ! st )
return NULL ;
2011-08-23 16:40:58 +03:00
if ( ! ff_guidcmp ( formattype , ff_format_waveformatex ) ) {
2016-04-10 21:58:15 +02:00
int ret = ff_get_wav_header ( s , pb , st - > codecpar , size , 0 ) ;
2011-04-12 18:44:20 +03:00
if ( ret < 0 )
return NULL ;
2010-12-26 03:28:25 +02:00
} else {
2011-05-01 22:13:18 +03:00
if ( ff_guidcmp ( formattype , ff_format_none ) )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown formattype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2010-12-26 03:28:25 +02:00
}
2011-04-05 13:36:55 +03:00
if ( ! memcmp ( subtype + 4 , ( const uint8_t [ ] ) { FF_MEDIASUBTYPE_BASE_GUID } , 12 ) ) {
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_id = ff_wav_codec_get_id ( AV_RL32 ( subtype ) , st - > codecpar - > bits_per_coded_sample ) ;
2010-12-26 03:28:25 +02:00
} else if ( ! ff_guidcmp ( subtype , mediasubtype_mpeg1payload ) ) {
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
if ( st - > codecpar - > extradata & & st - > codecpar - > extradata_size > = 22 )
2010-12-26 03:28:25 +02:00
parse_mpeg1waveformatex ( st ) ;
else
av_log ( s , AV_LOG_WARNING , " MPEG1WAVEFORMATEX underflow \n " ) ;
} else {
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_id = ff_codec_guid_get_id ( ff_codec_wav_guids , subtype ) ;
if ( st - > codecpar - > codec_id = = AV_CODEC_ID_NONE )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown subtype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( subtype ) ) ;
2010-12-26 03:28:25 +02:00
}
return st ;
2011-05-01 22:13:18 +03:00
} else if ( ! ff_guidcmp ( mediatype , ff_mediatype_video ) ) {
2011-01-04 13:38:29 +02:00
st = new_stream ( s , st , sid , AVMEDIA_TYPE_VIDEO ) ;
2010-12-26 03:28:25 +02:00
if ( ! st )
return NULL ;
2013-12-23 12:39:13 +03:00
if ( ! ff_guidcmp ( formattype , ff_format_videoinfo2 ) ) {
2010-12-26 03:28:25 +02:00
int consumed = parse_videoinfoheader2 ( s , st ) ;
2011-03-17 08:35:18 +02:00
avio_skip ( pb , FFMAX ( size - consumed , 0 ) ) ;
2011-08-23 16:40:58 +03:00
} else if ( ! ff_guidcmp ( formattype , ff_format_mpeg2_video ) ) {
2014-04-04 14:07:36 +03:00
uint64_t consumed = parse_videoinfoheader2 ( s , st ) ;
2014-05-01 15:22:09 +03:00
/* ignore extradata; files produced by windows media center contain meaningless mpeg1 sequence header */
2011-03-17 08:35:18 +02:00
avio_skip ( pb , FFMAX ( size - consumed , 0 ) ) ;
2010-12-26 03:28:25 +02:00
} else {
2011-05-01 22:13:18 +03:00
if ( ff_guidcmp ( formattype , ff_format_none ) )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown formattype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2010-12-26 03:28:25 +02:00
}
2011-04-05 13:36:55 +03:00
if ( ! memcmp ( subtype + 4 , ( const uint8_t [ ] ) { FF_MEDIASUBTYPE_BASE_GUID } , 12 ) ) {
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_id = ff_codec_get_id ( ff_codec_bmp_tags , AV_RL32 ( subtype ) ) ;
2010-12-26 03:28:25 +02:00
} else {
2016-04-10 21:58:15 +02:00
st - > codecpar - > codec_id = ff_codec_guid_get_id ( ff_video_guids , subtype ) ;
2010-12-26 03:28:25 +02:00
}
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
if ( st - > codecpar - > codec_id = = AV_CODEC_ID_NONE )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown subtype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( subtype ) ) ;
2010-12-26 03:28:25 +02:00
return st ;
} else if ( ! ff_guidcmp ( mediatype , mediatype_mpeg2_pes ) & &
! ff_guidcmp ( subtype , mediasubtype_dvb_subtitle ) ) {
2011-01-04 13:38:29 +02:00
st = new_stream ( s , st , sid , AVMEDIA_TYPE_SUBTITLE ) ;
2010-12-26 03:28:25 +02:00
if ( ! st )
return NULL ;
2011-05-01 22:13:18 +03:00
if ( ff_guidcmp ( formattype , ff_format_none ) )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown formattype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 21:42:52 +03:00
st - > codecpar - > codec_id = AV_CODEC_ID_DVB_SUBTITLE ;
2010-12-26 03:28:25 +02:00
return st ;
} else if ( ! ff_guidcmp ( mediatype , mediatype_mstvcaption ) & &
( ! ff_guidcmp ( subtype , mediasubtype_teletext ) | | ! ff_guidcmp ( subtype , mediasubtype_dtvccdata ) ) ) {
2011-01-04 13:38:29 +02:00
st = new_stream ( s , st , sid , AVMEDIA_TYPE_SUBTITLE ) ;
2010-12-26 03:28:25 +02:00
if ( ! st )
return NULL ;
2011-05-01 22:13:18 +03:00
if ( ff_guidcmp ( formattype , ff_format_none ) )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown formattype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2016-04-10 21:58:15 +02:00
st - > codecpar - > codec_id = ! ff_guidcmp ( subtype , mediasubtype_teletext ) ? AV_CODEC_ID_DVB_TELETEXT : AV_CODEC_ID_EIA_608 ;
2010-12-26 03:28:25 +02:00
return st ;
} else if ( ! ff_guidcmp ( mediatype , mediatype_mpeg2_sections ) & &
! ff_guidcmp ( subtype , mediasubtype_mpeg2_sections ) ) {
2011-05-01 22:13:18 +03:00
if ( ff_guidcmp ( formattype , ff_format_none ) )
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown formattype: " FF_PRI_GUID " \n " , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2010-12-26 03:28:25 +02:00
return NULL ;
}
2011-04-05 13:36:55 +03:00
av_log ( s , AV_LOG_WARNING , " unknown media type, mediatype: " FF_PRI_GUID
" , subtype: " FF_PRI_GUID " , formattype: " FF_PRI_GUID " \n " ,
FF_ARG_GUID ( mediatype ) , FF_ARG_GUID ( subtype ) , FF_ARG_GUID ( formattype ) ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , size ) ;
2010-12-26 03:28:25 +02:00
return NULL ;
}
enum {
SEEK_TO_DATA = 0 ,
SEEK_TO_PTS ,
} ;
2014-08-29 09:42:04 +03:00
/**
* Try to seek over a broken chunk
* @ return < 0 on error
*/
static int recover ( WtvContext * wtv , uint64_t broken_pos )
{
AVIOContext * pb = wtv - > pb ;
int i ;
for ( i = 0 ; i < wtv - > nb_index_entries ; i + + ) {
if ( wtv - > index_entries [ i ] . pos > broken_pos ) {
2015-02-20 21:57:31 +02:00
int64_t ret = avio_seek ( pb , wtv - > index_entries [ i ] . pos , SEEK_SET ) ;
2014-08-29 09:42:04 +03:00
if ( ret < 0 )
return ret ;
wtv - > pts = wtv - > index_entries [ i ] . timestamp ;
return 0 ;
}
}
return AVERROR ( EIO ) ;
}
2010-12-26 03:28:25 +02:00
/**
* Parse WTV chunks
2011-01-23 03:58:59 +02:00
* @ param mode SEEK_TO_DATA or SEEK_TO_PTS
* @ param seekts timestamp
2011-07-04 01:34:44 +03:00
* @ param [ out ] len_ptr Length of data chunk
2010-12-26 03:28:25 +02:00
* @ return stream index of data chunk , or < 0 on error
*/
static int parse_chunks ( AVFormatContext * s , int mode , int64_t seekts , int * len_ptr )
{
WtvContext * wtv = s - > priv_data ;
2011-02-20 12:04:12 +02:00
AVIOContext * pb = wtv - > pb ;
2014-08-07 23:12:41 +03:00
while ( ! avio_feof ( pb ) ) {
2010-12-26 03:28:25 +02:00
ff_asf_guid g ;
int len , sid , consumed ;
ff_get_guid ( pb , & g ) ;
2011-02-21 17:43:01 +02:00
len = avio_rl32 ( pb ) ;
2014-08-29 09:42:04 +03:00
if ( len < 32 ) {
int ret ;
2014-10-02 10:41:57 +03:00
if ( avio_feof ( pb ) )
return AVERROR_EOF ;
2014-08-29 09:42:04 +03:00
av_log ( s , AV_LOG_WARNING , " encountered broken chunk \n " ) ;
if ( ( ret = recover ( wtv , avio_tell ( pb ) - 20 ) ) < 0 )
return ret ;
continue ;
}
2011-02-21 17:43:01 +02:00
sid = avio_rl32 ( pb ) & 0x7FFF ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 8 ) ;
2010-12-26 03:28:25 +02:00
consumed = 32 ;
2012-11-06 06:01:35 +03:00
if ( ! ff_guidcmp ( g , ff_SBE2_STREAM_DESC_EVENT ) ) {
2010-12-26 03:28:25 +02:00
if ( ff_find_stream_index ( s , sid ) < 0 ) {
ff_asf_guid mediatype , subtype , formattype ;
int size ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 28 ) ;
2011-02-05 03:10:32 +02:00
ff_get_guid ( pb , & mediatype ) ;
ff_get_guid ( pb , & subtype ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 12 ) ;
2011-02-05 03:10:32 +02:00
ff_get_guid ( pb , & formattype ) ;
2011-02-21 17:43:01 +02:00
size = avio_rl32 ( pb ) ;
2011-02-05 03:10:32 +02:00
parse_media_type ( s , 0 , sid , mediatype , subtype , formattype , size ) ;
consumed + = 92 + size ;
2010-12-26 03:28:25 +02:00
}
2011-08-23 16:40:58 +03:00
} else if ( ! ff_guidcmp ( g , ff_stream2_guid ) ) {
2011-01-04 13:38:29 +02:00
int stream_index = ff_find_stream_index ( s , sid ) ;
2012-12-03 00:36:15 +03:00
if ( stream_index > = 0 & & s - > streams [ stream_index ] - > priv_data & & ! ( ( WtvStream * ) s - > streams [ stream_index ] - > priv_data ) - > seen_data ) {
2011-01-04 13:38:29 +02:00
ff_asf_guid mediatype , subtype , formattype ;
int size ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 12 ) ;
2011-01-04 13:38:29 +02:00
ff_get_guid ( pb , & mediatype ) ;
ff_get_guid ( pb , & subtype ) ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 12 ) ;
2011-01-04 13:38:29 +02:00
ff_get_guid ( pb , & formattype ) ;
2011-02-21 17:43:01 +02:00
size = avio_rl32 ( pb ) ;
2011-01-04 13:38:29 +02:00
parse_media_type ( s , s - > streams [ stream_index ] , sid , mediatype , subtype , formattype , size ) ;
consumed + = 76 + size ;
}
2010-12-29 15:41:10 +02:00
} else if ( ! ff_guidcmp ( g , EVENTID_AudioDescriptorSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_CtxADescriptorSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_CSDescriptorSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_StreamIDSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_SubtitleSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_TeletextSpanningEvent ) ) {
2010-12-26 03:28:25 +02:00
int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 ) {
AVStream * st = s - > streams [ stream_index ] ;
2010-12-29 15:41:10 +02:00
uint8_t buf [ 258 ] ;
const uint8_t * pbuf = buf ;
int buf_size ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 8 ) ;
2010-12-29 15:41:10 +02:00
consumed + = 8 ;
if ( ! ff_guidcmp ( g , EVENTID_CtxADescriptorSpanningEvent ) | |
! ff_guidcmp ( g , EVENTID_CSDescriptorSpanningEvent ) ) {
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 6 ) ;
2010-12-29 15:41:10 +02:00
consumed + = 6 ;
}
2010-12-26 03:28:25 +02:00
2010-12-29 15:41:10 +02:00
buf_size = FFMIN ( len - consumed , sizeof ( buf ) ) ;
2011-02-21 17:43:01 +02:00
avio_read ( pb , buf , buf_size ) ;
2010-12-29 15:41:10 +02:00
consumed + = buf_size ;
2011-10-29 03:08:54 +03:00
ff_parse_mpeg2_descriptor ( s , st , 0 , & pbuf , buf + buf_size , NULL , 0 , 0 , NULL ) ;
2010-12-26 03:28:25 +02:00
}
2011-02-10 08:26:10 +02:00
} else if ( ! ff_guidcmp ( g , EVENTID_AudioTypeSpanningEvent ) ) {
int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 ) {
AVStream * st = s - > streams [ stream_index ] ;
int audio_type ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 8 ) ;
2011-02-21 17:43:01 +02:00
audio_type = avio_r8 ( pb ) ;
2011-02-10 08:26:10 +02:00
if ( audio_type = = 2 )
st - > disposition | = AV_DISPOSITION_HEARING_IMPAIRED ;
else if ( audio_type = = 3 )
st - > disposition | = AV_DISPOSITION_VISUAL_IMPAIRED ;
consumed + = 9 ;
}
2011-01-02 13:17:34 +02:00
} else if ( ! ff_guidcmp ( g , EVENTID_DVBScramblingControlSpanningEvent ) ) {
int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 ) {
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 12 ) ;
2011-02-21 17:43:01 +02:00
if ( avio_rl32 ( pb ) )
2011-01-02 13:17:34 +02:00
av_log ( s , AV_LOG_WARNING , " DVB scrambled stream detected (st:%d), decoding will likely fail \n " , stream_index ) ;
consumed + = 16 ;
}
2010-12-29 05:49:02 +02:00
} else if ( ! ff_guidcmp ( g , EVENTID_LanguageSpanningEvent ) ) {
2010-12-26 03:28:25 +02:00
int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 ) {
AVStream * st = s - > streams [ stream_index ] ;
2010-12-29 15:41:10 +02:00
uint8_t language [ 4 ] ;
2011-03-15 10:14:38 +02:00
avio_skip ( pb , 12 ) ;
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avio_read ( pb , language , 3 ) ;
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if ( language [ 0 ] ) {
language [ 3 ] = 0 ;
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av_dict_set ( & st - > metadata , " language " , language , 0 ) ;
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if ( ! strcmp ( language , " nar " ) | | ! strcmp ( language , " NAR " ) )
st - > disposition | = AV_DISPOSITION_VISUAL_IMPAIRED ;
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}
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consumed + = 15 ;
}
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} else if ( ! ff_guidcmp ( g , ff_timestamp_guid ) ) {
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int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 ) {
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avio_skip ( pb , 8 ) ;
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wtv - > pts = avio_rl64 ( pb ) ;
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consumed + = 16 ;
if ( wtv - > pts = = - 1 )
wtv - > pts = AV_NOPTS_VALUE ;
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else {
wtv - > last_valid_pts = wtv - > pts ;
if ( wtv - > epoch = = AV_NOPTS_VALUE | | wtv - > pts < wtv - > epoch )
wtv - > epoch = wtv - > pts ;
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if ( mode = = SEEK_TO_PTS & & wtv - > pts > = seekts ) {
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avio_skip ( pb , WTV_PAD8 ( len ) - consumed ) ;
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return 0 ;
}
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}
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}
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} else if ( ! ff_guidcmp ( g , ff_data_guid ) ) {
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int stream_index = ff_find_stream_index ( s , sid ) ;
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if ( mode = = SEEK_TO_DATA & & stream_index > = 0 & & len > 32 & & s - > streams [ stream_index ] - > priv_data ) {
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WtvStream * wst = s - > streams [ stream_index ] - > priv_data ;
wst - > seen_data = 1 ;
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if ( len_ptr ) {
* len_ptr = len ;
}
return stream_index ;
}
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} else if ( ! ff_guidcmp ( g , /* DSATTRIB_WMDRMProtectionInfo */ ( const ff_asf_guid ) { 0x83 , 0x95 , 0x74 , 0x40 , 0x9D , 0x6B , 0xEC , 0x4E , 0xB4 , 0x3C , 0x67 , 0xA1 , 0x80 , 0x1E , 0x1A , 0x9B } ) ) {
int stream_index = ff_find_stream_index ( s , sid ) ;
if ( stream_index > = 0 )
av_log ( s , AV_LOG_WARNING , " encrypted stream detected (st:%d), decoding will likely fail \n " , stream_index ) ;
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} else if (
! ff_guidcmp ( g , /* DSATTRIB_CAPTURE_STREAMTIME */ ( const ff_asf_guid ) { 0x14 , 0x56 , 0x1A , 0x0C , 0xCD , 0x30 , 0x40 , 0x4F , 0xBC , 0xBF , 0xD0 , 0x3E , 0x52 , 0x30 , 0x62 , 0x07 } ) | |
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! ff_guidcmp ( g , /* DSATTRIB_PBDATAG_ATTRIBUTE */ ( const ff_asf_guid ) { 0x79 , 0x66 , 0xB5 , 0xE0 , 0xB9 , 0x12 , 0xCC , 0x43 , 0xB7 , 0xDF , 0x57 , 0x8C , 0xAA , 0x5A , 0x7B , 0x63 } ) | |
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! ff_guidcmp ( g , /* DSATTRIB_PicSampleSeq */ ( const ff_asf_guid ) { 0x02 , 0xAE , 0x5B , 0x2F , 0x8F , 0x7B , 0x60 , 0x4F , 0x82 , 0xD6 , 0xE4 , 0xEA , 0x2F , 0x1F , 0x4C , 0x99 } ) | |
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! ff_guidcmp ( g , /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES ) | |
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! ff_guidcmp ( g , /* dvr_ms_vid_frame_rep_data */ ( const ff_asf_guid ) { 0xCC , 0x32 , 0x64 , 0xDD , 0x29 , 0xE2 , 0xDB , 0x40 , 0x80 , 0xF6 , 0xD2 , 0x63 , 0x28 , 0xD2 , 0x76 , 0x1F } ) | |
! ff_guidcmp ( g , /* EVENTID_ChannelChangeSpanningEvent */ ( const ff_asf_guid ) { 0xE5 , 0xC5 , 0x67 , 0x90 , 0x5C , 0x4C , 0x05 , 0x42 , 0x86 , 0xC8 , 0x7A , 0xFE , 0x20 , 0xFE , 0x1E , 0xFA } ) | |
! ff_guidcmp ( g , /* EVENTID_ChannelInfoSpanningEvent */ ( const ff_asf_guid ) { 0x80 , 0x6D , 0xF3 , 0x41 , 0x32 , 0x41 , 0xC2 , 0x4C , 0xB1 , 0x21 , 0x01 , 0xA4 , 0x32 , 0x19 , 0xD8 , 0x1B } ) | |
! ff_guidcmp ( g , /* EVENTID_ChannelTypeSpanningEvent */ ( const ff_asf_guid ) { 0x51 , 0x1D , 0xAB , 0x72 , 0xD2 , 0x87 , 0x9B , 0x48 , 0xBA , 0x11 , 0x0E , 0x08 , 0xDC , 0x21 , 0x02 , 0x43 } ) | |
! ff_guidcmp ( g , /* EVENTID_PIDListSpanningEvent */ ( const ff_asf_guid ) { 0x65 , 0x8F , 0xFC , 0x47 , 0xBB , 0xE2 , 0x34 , 0x46 , 0x9C , 0xEF , 0xFD , 0xBF , 0xE6 , 0x26 , 0x1D , 0x5C } ) | |
! ff_guidcmp ( g , /* EVENTID_SignalAndServiceStatusSpanningEvent */ ( const ff_asf_guid ) { 0xCB , 0xC5 , 0x68 , 0x80 , 0x04 , 0x3C , 0x2B , 0x49 , 0xB4 , 0x7D , 0x03 , 0x08 , 0x82 , 0x0D , 0xCE , 0x51 } ) | |
! ff_guidcmp ( g , /* EVENTID_StreamTypeSpanningEvent */ ( const ff_asf_guid ) { 0xBC , 0x2E , 0xAF , 0x82 , 0xA6 , 0x30 , 0x64 , 0x42 , 0xA8 , 0x0B , 0xAD , 0x2E , 0x13 , 0x72 , 0xAC , 0x60 } ) | |
! ff_guidcmp ( g , ( const ff_asf_guid ) { 0x1E , 0xBE , 0xC3 , 0xC5 , 0x43 , 0x92 , 0xDC , 0x11 , 0x85 , 0xE5 , 0x00 , 0x12 , 0x3F , 0x6F , 0x73 , 0xB9 } ) | |
! ff_guidcmp ( g , ( const ff_asf_guid ) { 0x3B , 0x86 , 0xA2 , 0xB1 , 0xEB , 0x1E , 0xC3 , 0x44 , 0x8C , 0x88 , 0x1C , 0xA3 , 0xFF , 0xE3 , 0xE7 , 0x6A } ) | |
! ff_guidcmp ( g , ( const ff_asf_guid ) { 0x4E , 0x7F , 0x4C , 0x5B , 0xC4 , 0xD0 , 0x38 , 0x4B , 0xA8 , 0x3E , 0x21 , 0x7F , 0x7B , 0xBF , 0x52 , 0xE7 } ) | |
! ff_guidcmp ( g , ( const ff_asf_guid ) { 0x63 , 0x36 , 0xEB , 0xFE , 0xA1 , 0x7E , 0xD9 , 0x11 , 0x83 , 0x08 , 0x00 , 0x07 , 0xE9 , 0x5E , 0xAD , 0x8D } ) | |
! ff_guidcmp ( g , ( const ff_asf_guid ) { 0x70 , 0xE9 , 0xF1 , 0xF8 , 0x89 , 0xA4 , 0x4C , 0x4D , 0x83 , 0x73 , 0xB8 , 0x12 , 0xE0 , 0xD5 , 0xF8 , 0x1E } ) | |
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! ff_guidcmp ( g , ff_index_guid ) | |
! ff_guidcmp ( g , ff_sync_guid ) | |
! ff_guidcmp ( g , ff_stream1_guid ) | |
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! ff_guidcmp ( g , ( const ff_asf_guid ) { 0xF7 , 0x10 , 0x02 , 0xB9 , 0xEE , 0x7C , 0xED , 0x4E , 0xBD , 0x7F , 0x05 , 0x40 , 0x35 , 0x86 , 0x18 , 0xA1 } ) ) {
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//ignore known guids
} else
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av_log ( s , AV_LOG_WARNING , " unsupported chunk: " FF_PRI_GUID " \n " , FF_ARG_GUID ( g ) ) ;
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avio_skip ( pb , WTV_PAD8 ( len ) - consumed ) ;
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}
return AVERROR_EOF ;
}
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static int read_header ( AVFormatContext * s )
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{
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WtvContext * wtv = s - > priv_data ;
int root_sector , root_size ;
uint8_t root [ WTV_SECTOR_SIZE ] ;
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AVIOContext * pb ;
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int64_t timeline_pos ;
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int64_t ret ;
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wtv - > epoch =
wtv - > pts =
wtv - > last_valid_pts = AV_NOPTS_VALUE ;
/* read root directory sector */
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avio_skip ( s - > pb , 0x30 ) ;
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root_size = avio_rl32 ( s - > pb ) ;
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if ( root_size > sizeof ( root ) ) {
av_log ( s , AV_LOG_ERROR , " root directory size exceeds sector size \n " ) ;
return AVERROR_INVALIDDATA ;
}
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avio_skip ( s - > pb , 4 ) ;
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root_sector = avio_rl32 ( s - > pb ) ;
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ret = seek_by_sector ( s - > pb , root_sector , 0 ) ;
if ( ret < 0 )
return ret ;
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root_size = avio_read ( s - > pb , root , root_size ) ;
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if ( root_size < 0 )
return AVERROR_INVALIDDATA ;
/* parse chunks up until first data chunk */
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wtv - > pb = wtvfile_open ( s , root , root_size , ff_timeline_le16 ) ;
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if ( ! wtv - > pb ) {
av_log ( s , AV_LOG_ERROR , " timeline data missing \n " ) ;
return AVERROR_INVALIDDATA ;
}
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ret = parse_chunks ( s , SEEK_TO_DATA , 0 , 0 ) ;
if ( ret < 0 )
return ret ;
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avio_seek ( wtv - > pb , - 32 , SEEK_CUR ) ;
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timeline_pos = avio_tell ( s - > pb ) ; // save before opening another file
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/* read metadata */
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pb = wtvfile_open ( s , root , root_size , ff_table_0_entries_legacy_attrib_le16 ) ;
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if ( pb ) {
parse_legacy_attrib ( s , pb ) ;
wtvfile_close ( pb ) ;
}
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s - > ctx_flags | = AVFMTCTX_NOHEADER ; // Needed for noStreams.wtv
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/* read seek index */
if ( s - > nb_streams ) {
AVStream * st = s - > streams [ 0 ] ;
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pb = wtvfile_open ( s , root , root_size , ff_table_0_entries_time_le16 ) ;
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if ( pb ) {
while ( 1 ) {
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uint64_t timestamp = avio_rl64 ( pb ) ;
uint64_t frame_nb = avio_rl64 ( pb ) ;
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if ( avio_feof ( pb ) )
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break ;
ff_add_index_entry ( & wtv - > index_entries , & wtv - > nb_index_entries , & wtv - > index_entries_allocated_size ,
0 , timestamp , frame_nb , 0 , AVINDEX_KEYFRAME ) ;
}
wtvfile_close ( pb ) ;
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2011-01-23 03:58:59 +02:00
if ( wtv - > nb_index_entries ) {
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pb = wtvfile_open ( s , root , root_size , ff_timeline_table_0_entries_Events_le16 ) ;
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if ( pb ) {
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AVIndexEntry * e = wtv - > index_entries ;
AVIndexEntry * e_end = wtv - > index_entries + wtv - > nb_index_entries - 1 ;
uint64_t last_position = 0 ;
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while ( 1 ) {
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uint64_t frame_nb = avio_rl64 ( pb ) ;
uint64_t position = avio_rl64 ( pb ) ;
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while ( e < = e_end & & frame_nb > e - > size ) {
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e - > pos = last_position ;
e + + ;
}
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if ( avio_feof ( pb ) )
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break ;
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last_position = position ;
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}
2016-01-29 22:27:00 +02:00
e_end - > pos = last_position ;
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wtvfile_close ( pb ) ;
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st - > duration = e_end - > timestamp ;
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}
}
}
}
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avio_seek ( s - > pb , timeline_pos , SEEK_SET ) ;
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return 0 ;
}
static int read_packet ( AVFormatContext * s , AVPacket * pkt )
{
WtvContext * wtv = s - > priv_data ;
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AVIOContext * pb = wtv - > pb ;
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int stream_index , len , ret ;
stream_index = parse_chunks ( s , SEEK_TO_DATA , 0 , & len ) ;
if ( stream_index < 0 )
return stream_index ;
ret = av_get_packet ( pb , pkt , len - 32 ) ;
if ( ret < 0 )
return ret ;
pkt - > stream_index = stream_index ;
pkt - > pts = wtv - > pts ;
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avio_skip ( pb , WTV_PAD8 ( len ) - len ) ;
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return 0 ;
}
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static int read_seek ( AVFormatContext * s , int stream_index ,
int64_t ts , int flags )
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{
WtvContext * wtv = s - > priv_data ;
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AVIOContext * pb = wtv - > pb ;
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AVStream * st = s - > streams [ 0 ] ;
int64_t ts_relative ;
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int i ;
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if ( ( flags & AVSEEK_FLAG_FRAME ) | | ( flags & AVSEEK_FLAG_BYTE ) )
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return AVERROR ( ENOSYS ) ;
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/* timestamp adjustment is required because wtv->pts values are absolute,
* whereas AVIndexEntry - > timestamp values are relative to epoch . */
ts_relative = ts ;
if ( wtv - > epoch ! = AV_NOPTS_VALUE )
ts_relative - = wtv - > epoch ;
i = ff_index_search_timestamp ( wtv - > index_entries , wtv - > nb_index_entries , ts_relative , flags ) ;
if ( i < 0 ) {
2011-09-14 20:42:33 +03:00
if ( wtv - > last_valid_pts = = AV_NOPTS_VALUE | | ts < wtv - > last_valid_pts ) {
if ( avio_seek ( pb , 0 , SEEK_SET ) < 0 )
return - 1 ;
} else if ( st - > duration ! = AV_NOPTS_VALUE & & ts_relative > st - > duration & & wtv - > nb_index_entries ) {
if ( avio_seek ( pb , wtv - > index_entries [ wtv - > nb_index_entries - 1 ] . pos , SEEK_SET ) < 0 )
return - 1 ;
}
2011-01-23 03:58:59 +02:00
if ( parse_chunks ( s , SEEK_TO_PTS , ts , 0 ) < 0 )
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return AVERROR ( ERANGE ) ;
return 0 ;
}
2011-09-14 20:42:33 +03:00
if ( avio_seek ( pb , wtv - > index_entries [ i ] . pos , SEEK_SET ) < 0 )
return - 1 ;
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wtv - > pts = wtv - > index_entries [ i ] . timestamp ;
if ( wtv - > epoch ! = AV_NOPTS_VALUE )
wtv - > pts + = wtv - > epoch ;
wtv - > last_valid_pts = wtv - > pts ;
return 0 ;
}
static int read_close ( AVFormatContext * s )
{
WtvContext * wtv = s - > priv_data ;
2012-01-12 02:52:40 +03:00
av_freep ( & wtv - > index_entries ) ;
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wtvfile_close ( wtv - > pb ) ;
return 0 ;
2010-12-26 03:28:25 +02:00
}
2011-01-26 00:03:28 +02:00
AVInputFormat ff_wtv_demuxer = {
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. name = " wtv " ,
. long_name = NULL_IF_CONFIG_SMALL ( " Windows Television (WTV) " ) ,
. priv_data_size = sizeof ( WtvContext ) ,
. read_probe = read_probe ,
. read_header = read_header ,
. read_packet = read_packet ,
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. read_seek = read_seek ,
. read_close = read_close ,
. flags = AVFMT_SHOW_IDS ,
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} ;