/*****************************************************************************
* demux.c
*****************************************************************************
* Copyright (C) 1999-2004 the VideoLAN team
* $Id$
*
* Author: 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "vlc_common.h"
#include "input_internal.h"
static bool SkipID3Tag( demux_t * );
static bool SkipAPETag( demux_t *p_demux );
/*****************************************************************************
* demux_New:
* if s is NULL then load a access_demux
*****************************************************************************/
demux_t *__demux_New( vlc_object_t *p_obj,
const char *psz_access, const char *psz_demux,
const char *psz_path,
stream_t *s, es_out_t *out, bool b_quick )
{
static const char typename[] = "demux";
demux_t *p_demux = vlc_custom_create( p_obj, sizeof( *p_demux ),
VLC_OBJECT_GENERIC, typename );
const char *psz_module;
if( p_demux == NULL ) return NULL;
/* Parse URL */
p_demux->psz_access = strdup( psz_access );
p_demux->psz_demux = strdup( psz_demux );
p_demux->psz_path = strdup( psz_path );
/* Take into account "demux" to be able to do :demux=dump */
if( p_demux->psz_demux && *p_demux->psz_demux == '\0' )
{
free( p_demux->psz_demux );
p_demux->psz_demux = var_GetNonEmptyString( p_obj, "demux" );
if( p_demux->psz_demux == NULL )
p_demux->psz_demux = strdup( "" );
}
if( !b_quick )
{
msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
}
p_demux->s = s;
p_demux->out = out;
p_demux->pf_demux = NULL;
p_demux->pf_control = NULL;
p_demux->p_sys = NULL;
p_demux->info.i_update = 0;
p_demux->info.i_title = 0;
p_demux->info.i_seekpoint = 0;
if( s ) psz_module = p_demux->psz_demux;
else psz_module = p_demux->psz_access;
if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
{
/* XXX: add only file without any problem here and with strong detection.
* - no .mp3, .a52, ... (aac is added as it works only by file ext
* anyway
* - wav can't be added 'cause of a52 and dts in them as raw audio
*/
static const struct { char ext[5]; char demux[9]; } exttodemux[] =
{
{ "aac", "aac" },
{ "aiff", "aiff" },
{ "asf", "asf" }, { "wmv", "asf" }, { "wma", "asf" },
{ "avi", "avi" },
{ "au", "au" },
{ "flac", "flac" },
{ "dv", "dv" },
{ "m3u", "playlist" },
{ "mkv", "mkv" }, { "mka", "mkv" }, { "mks", "mkv" },
{ "mp4", "mp4" }, { "m4a", "mp4" }, { "mov", "mp4" }, { "moov", "mp4" },
{ "mod", "mod" }, { "xm", "mod" },
{ "nsv", "nsv" },
{ "ogg", "ogg" }, { "ogm", "ogg" },
{ "pva", "pva" },
{ "rm", "rm" },
{ "m4v", "m4v" },
{ "h264", "h264" },
{ "", "" },
};
/* Here, we don't mind if it does not work, it must be quick */
static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
{
{ "mp3", "mpga" },
{ "ogg", "ogg" },
{ "wma", "asf" },
{ "", "" }
};
const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
int i;
if( !b_quick )
{
for( i = 0; exttodemux[i].ext[0]; i++ )
{
if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
{
psz_module = exttodemux[i].demux;
break;
}
}
}
else
{
for( i = 0; exttodemux_quick[i].ext[0]; i++ )
{
if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
{
psz_module = exttodemux_quick[i].demux;
break;
}
}
}
}
/* Before module_Need (for var_Create...) */
vlc_object_attach( p_demux, p_obj );
if( s )
{
/* ID3/APE tags will mess-up demuxer probing so we skip it here.
* ID3/APE parsers will called later on in the demuxer to access the
* skipped info. */
if( !SkipID3Tag( p_demux ) )
SkipAPETag( p_demux );
p_demux->p_module =
module_Need( p_demux, "demux", psz_module,
!strcmp( psz_module, p_demux->psz_demux ) ?
true : false );
}
else
{
p_demux->p_module =
module_Need( p_demux, "access_demux", psz_module,
!strcmp( psz_module, p_demux->psz_access ) ?
true : false );
}
if( p_demux->p_module == NULL )
{
vlc_object_detach( p_demux );
free( p_demux->psz_path );
free( p_demux->psz_demux );
free( p_demux->psz_access );
vlc_object_release( p_demux );
return NULL;
}
return p_demux;
}
/*****************************************************************************
* demux_Delete:
*****************************************************************************/
void demux_Delete( demux_t *p_demux )
{
module_Unneed( p_demux, p_demux->p_module );
vlc_object_detach( p_demux );
free( p_demux->psz_path );
free( p_demux->psz_demux );
free( p_demux->psz_access );
vlc_object_release( p_demux );
}
/*****************************************************************************
* demux_vaControlHelper:
*****************************************************************************/
int demux_vaControlHelper( stream_t *s,
int64_t i_start, int64_t i_end,
int i_bitrate, int i_align,
int i_query, va_list args )
{
int64_t i_tell;
double f, *pf;
int64_t i64, *pi64;
if( i_end < 0 ) i_end = stream_Size( s );
if( i_start < 0 ) i_start = 0;
if( i_align <= 0 ) i_align = 1;
i_tell = stream_Tell( s );
switch( i_query )
{
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( i_bitrate > 0 && i_end > i_start )
{
*pi64 = INT64_C(8000000) * (i_end - i_start) / i_bitrate;
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( i_bitrate > 0 && i_end > i_start )
{
*pi64 = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_GET_POSITION:
pf = (double*)va_arg( args, double * );
if( i_start < i_end )
{
*pf = (double)( i_tell - i_start ) /
(double)( i_end - i_start );
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_SET_POSITION:
f = (double)va_arg( args, double );
if( i_start < i_end && f >= 0.0 && f <= 1.0 )
{
int64_t i_block = (f * ( i_end - i_start )) / i_align;
if( stream_Seek( s, i_start + i_block * i_align ) )
{
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_SET_TIME:
i64 = (int64_t)va_arg( args, int64_t );
if( i_bitrate > 0 && i64 >= 0 )
{
int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
if( stream_Seek( s, i_start + i_block * i_align ) )
{
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
return VLC_EGENERIC;
case DEMUX_GET_FPS:
case DEMUX_GET_META:
case DEMUX_HAS_UNSUPPORTED_META:
case DEMUX_SET_NEXT_DEMUX_TIME:
case DEMUX_GET_TITLE_INFO:
case DEMUX_SET_GROUP:
case DEMUX_GET_ATTACHMENTS:
return VLC_EGENERIC;
default:
msg_Err( s, "unknown query in demux_vaControlDefault" );
return VLC_EGENERIC;
}
}
/****************************************************************************
* stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
****************************************************************************/
typedef struct
{
/* Data buffer */
block_fifo_t *p_fifo;
block_t *p_block;
int64_t i_pos;
/* Demuxer */
char *psz_name;
es_out_t *out;
demux_t *p_demux;
} d_stream_sys_t;
static int DStreamRead ( stream_t *, void *p_read, unsigned int i_read );
static int DStreamPeek ( stream_t *, const uint8_t **pp_peek, unsigned int i_peek );
static int DStreamControl( stream_t *, int i_query, va_list );
static void* DStreamThread ( vlc_object_t * );
stream_t *__stream_DemuxNew( vlc_object_t *p_obj, const char *psz_demux,
es_out_t *out )
{
/* We create a stream reader, and launch a thread */
stream_t *s;
d_stream_sys_t *p_sys;
if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
s = vlc_stream_create( p_obj );
if( s == NULL )
return NULL;
s->pf_read = DStreamRead;
s->pf_peek = DStreamPeek;
s->pf_control= DStreamControl;
s->i_char_width = 1;
s->b_little_endian = false;
s->p_sys = malloc( sizeof( d_stream_sys_t) );
if( s->p_sys == NULL )
{
vlc_object_release( s );
return NULL;
}
p_sys = (d_stream_sys_t*)s->p_sys;
p_sys->i_pos = 0;
p_sys->out = out;
p_sys->p_demux = NULL;
p_sys->p_block = NULL;
p_sys->psz_name = strdup( psz_demux );
/* decoder fifo */
if( ( p_sys->p_fifo = block_FifoNew() ) == NULL )
{
vlc_object_release( s );
free( p_sys->psz_name );
free( p_sys );
return NULL;
}
if( vlc_thread_create( s, "stream out", DStreamThread,
VLC_THREAD_PRIORITY_INPUT, false ) )
{
vlc_object_release( s );
free( p_sys->psz_name );
free( p_sys );
return NULL;
}
return s;
}
void stream_DemuxSend( stream_t *s, block_t *p_block )
{
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
}
void stream_DemuxDelete( stream_t *s )
{
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
block_t *p_empty;
vlc_object_kill( s );
if( p_sys->p_demux )
vlc_object_kill( p_sys->p_demux );
p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
block_FifoPut( p_sys->p_fifo, p_empty );
vlc_thread_join( s );
if( p_sys->p_demux ) demux_Delete( p_sys->p_demux );
if( p_sys->p_block ) block_Release( p_sys->p_block );
block_FifoRelease( p_sys->p_fifo );
free( p_sys->psz_name );
free( p_sys );
vlc_object_release( s );
}
static int DStreamRead( stream_t *s, void *p_read, unsigned int i_read )
{
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
uint8_t *p_out = p_read;
int i_out = 0;
//msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
while( !s->b_die && !s->b_error && i_read )
{
block_t *p_block = p_sys->p_block;
int i_copy;
if( !p_block )
{
p_block = block_FifoGet( p_sys->p_fifo );
if( !p_block ) s->b_error = 1;
p_sys->p_block = p_block;
}
if( p_block && i_read )
{
i_copy = __MIN( i_read, p_block->i_buffer );
if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
i_read -= i_copy;
i_out += i_copy;
p_block->i_buffer -= i_copy;
p_block->p_buffer += i_copy;
if( !p_block->i_buffer )
{
block_Release( p_block );
p_sys->p_block = NULL;
}
}
}
p_sys->i_pos += i_out;
return i_out;
}
static int DStreamPeek( stream_t *s, const uint8_t **pp_peek, unsigned int i_peek )
{
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
block_t **pp_block = &p_sys->p_block;
int i_out = 0;
*pp_peek = 0;
//msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
while( !s->b_die && !s->b_error && i_peek )
{
int i_copy;
if( !*pp_block )
{
*pp_block = block_FifoGet( p_sys->p_fifo );
if( !*pp_block ) s->b_error = 1;
}
if( *pp_block && i_peek )
{
i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
i_peek -= i_copy;
i_out += i_copy;
if( i_peek ) pp_block = &(*pp_block)->p_next;
}
}
if( p_sys->p_block )
{
p_sys->p_block = block_ChainGather( p_sys->p_block );
*pp_peek = p_sys->p_block->p_buffer;
}
return i_out;
}
static int DStreamControl( stream_t *s, int i_query, va_list args )
{
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
int64_t *p_i64;
bool *p_b;
int *p_int;
switch( i_query )
{
case STREAM_GET_SIZE:
p_i64 = (int64_t*) va_arg( args, int64_t * );
*p_i64 = 0;
return VLC_SUCCESS;
case STREAM_CAN_SEEK:
p_b = (bool*) va_arg( args, bool * );
*p_b = false;
return VLC_SUCCESS;
case STREAM_CAN_FASTSEEK:
p_b = (bool*) va_arg( args, bool * );
*p_b = false;
return VLC_SUCCESS;
case STREAM_GET_POSITION:
p_i64 = (int64_t*) va_arg( args, int64_t * );
*p_i64 = p_sys->i_pos;
return VLC_SUCCESS;
case STREAM_SET_POSITION:
{
int64_t i64 = (int64_t)va_arg( args, int64_t );
int i_skip;
if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
i_skip = i64 - p_sys->i_pos;
while( i_skip > 0 )
{
int i_read = DStreamRead( s, NULL, (long)i_skip );
if( i_read <= 0 ) return VLC_EGENERIC;
i_skip -= i_read;
}
return VLC_SUCCESS;
}
case STREAM_GET_MTU:
p_int = (int*) va_arg( args, int * );
*p_int = 0;
return VLC_SUCCESS;
case STREAM_CONTROL_ACCESS:
case STREAM_GET_CONTENT_TYPE:
return VLC_EGENERIC;
default:
msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
return VLC_EGENERIC;
}
}
static void* DStreamThread( vlc_object_t* p_this )
{
stream_t *s = (stream_t *)p_this;
d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
demux_t *p_demux;
/* Create the demuxer */
if( !(p_demux = demux_New( s, "", p_sys->psz_name, "", s, p_sys->out,
false )) )
{
return NULL;
}
p_sys->p_demux = p_demux;
/* Main loop */
while( !s->b_die && !p_demux->b_die )
{
if( p_demux->pf_demux( p_demux ) <= 0 ) break;
}
vlc_object_kill( p_demux );
return NULL;
}
/****************************************************************************
* Utility functions
****************************************************************************/
static bool SkipID3Tag( demux_t *p_demux )
{
const uint8_t *p_peek;
uint8_t version, revision;
int i_size;
int b_footer;
if( !p_demux->s )
return false;
/* Get 10 byte id3 header */
if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
return false;
if( memcmp( p_peek, "ID3", 3 ) )
return false;
version = p_peek[3];
revision = p_peek[4];
b_footer = p_peek[5] & 0x10;
i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
if( b_footer ) i_size += 10;
i_size += 10;
/* Skip the entire tag */
stream_Read( p_demux->s, NULL, i_size );
msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
version, revision, i_size );
return true;
}
static bool SkipAPETag( demux_t *p_demux )
{
const uint8_t *p_peek;
int i_version;
int i_size;
uint32_t flags;
if( !p_demux->s )
return false;
/* Get 32 byte ape header */
if( stream_Peek( p_demux->s, &p_peek, 32 ) < 32 )
return false;
if( memcmp( p_peek, "APETAGEX", 8 ) )
return false;
i_version = GetDWLE( &p_peek[8] );
flags = GetDWLE( &p_peek[8+4+4] );
if( ( i_version != 1000 && i_version != 2000 ) || !( flags & (1<<29) ) )
return false;
i_size = GetDWLE( &p_peek[8+4] ) + ( (flags&(1<<30)) ? 32 : 0 );
/* Skip the entire tag */
stream_Read( p_demux->s, NULL, i_size );
msg_Dbg( p_demux, "AP2 v%d tag found, skipping %d bytes",
i_version/1000, i_size );
return true;
}
