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vlc/modules/access/fake.c
Rémi Denis-Courmont fa4bde0b26 Trailing ;
2009-01-27 23:42:49 +02:00

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/*****************************************************************************
* fake.c : Fake video input for VLC
*****************************************************************************
* Copyright (C) 2005 the VideoLAN team
* $Id$
*
* Author: Christophe Massiot <massiot@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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_access.h>
#include <vlc_demux.h>
#include <vlc_image.h>
/*****************************************************************************
* Module descriptior
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
"Caching value for fake streams. This " \
"value should be set in milliseconds." )
#define FPS_TEXT N_("Framerate")
#define FPS_LONGTEXT N_( \
"Number of frames per second (eg. 24, 25, 29.97, 30).")
#define ID_TEXT N_("ID")
#define ID_LONGTEXT N_( \
"Set the ID of the fake elementary stream for use in " \
"#duplicate{} constructs (default 0).")
#define DURATION_TEXT N_("Duration in ms")
#define DURATION_LONGTEXT N_( \
"Duration of the fake streaming before faking an " \
"end-of-file (default is -1 meaning that the stream is unlimited when " \
"fake is forced, or lasts for 10 seconds otherwise. 0, means that the " \
"stream is unlimited).")
vlc_module_begin ()
set_shortname( N_("Fake") )
set_description( N_("Fake input") )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACCESS )
add_integer( "fake-caching", DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, true )
add_float( "fake-fps", 25.0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
add_integer( "fake-id", 0, NULL, ID_TEXT, ID_LONGTEXT, true )
add_integer( "fake-duration", -1, NULL, DURATION_TEXT, DURATION_LONGTEXT,
true )
add_shortcut( "fake" )
set_capability( "access_demux", 10 )
set_callbacks( Open, Close )
vlc_module_end ()
/*****************************************************************************
* Access: local prototypes
*****************************************************************************/
static int Demux ( demux_t * );
static int Control( demux_t *, int, va_list );
struct demux_sys_t
{
float f_fps;
mtime_t i_last_pts, i_duration, i_first_pts, i_end_pts, i_pause_pts;
es_out_id_t *p_es_video;
};
/*****************************************************************************
* Open: opens fake device
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
es_format_t fmt;
if( *p_demux->psz_access != '\0' )
{
/* if an access is provided, then it has to be "fake" */
if( strcmp( p_demux->psz_access, "fake" ) )
return VLC_EGENERIC;
msg_Dbg( p_demux, "fake:// access_demux detected" );
}
else
{
/**
* access is not provided,
* then let's see if path could be an image
**/
if( !p_demux->psz_path || !*p_demux->psz_path )
return VLC_EGENERIC;
vlc_fourcc_t i_codec = image_Ext2Fourcc( p_demux->psz_path );
if( !i_codec )
return VLC_EGENERIC;
msg_Dbg( p_demux, "still image detected with codec format %4.4s",
(const char*)&i_codec );
}
if( p_demux->psz_path && *p_demux->psz_path )
{
/* set up fake-file on the fly */
var_Create( p_demux->p_parent, "fake-file", VLC_VAR_STRING );
var_SetString( p_demux->p_parent, "fake-file", p_demux->psz_path );
}
/* Set up p_demux */
DEMUX_INIT_COMMON(); p_sys = p_demux->p_sys;
p_demux->info.i_update = 0;
p_demux->info.i_title = 0;
p_demux->info.i_seekpoint = 0;
p_sys->i_duration =
(mtime_t)var_CreateGetInteger( p_demux, "fake-duration" ) * 1000;
if( p_sys->i_duration < 0 )
{
if( !strcmp( p_demux->psz_access, "fake" ) )
p_sys->i_duration = 0;
else
p_sys->i_duration = 10000*1000;
}
p_sys->f_fps = var_CreateGetFloat( p_demux, "fake-fps" );
/* Declare the elementary stream */
es_format_Init( &fmt, VIDEO_ES, VLC_FOURCC('f','a','k','e') );
fmt.i_id = var_CreateGetInteger( p_demux, "fake-id" );
p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
/* Update default_pts to a suitable value for access */
var_Create( p_demux, "fake-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: close device, free resources
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
free( p_sys );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
bool *pb, b;
int64_t *pi64, i64;
double *pf, f;
switch( i_query )
{
/* Special for access_demux */
case DEMUX_CAN_PAUSE:
case DEMUX_CAN_SEEK:
case DEMUX_CAN_CONTROL_PACE:
pb = (bool *)va_arg( args, bool * );
*pb = true;
return VLC_SUCCESS;
case DEMUX_SET_PAUSE_STATE:
b = (bool)va_arg( args, int );
if ( b )
{
p_sys->i_pause_pts = mdate();
}
else if ( p_sys->i_pause_pts )
{
mtime_t i_pause_duration = mdate() - p_sys->i_pause_pts;
p_sys->i_first_pts += i_pause_duration;
p_sys->i_last_pts += i_pause_duration;
if ( p_sys->i_duration )
p_sys->i_end_pts += i_pause_duration;
p_sys->i_pause_pts = 0;
}
return VLC_SUCCESS;
case DEMUX_GET_PTS_DELAY:
pi64 = (int64_t *)va_arg( args, int64_t * );
*pi64 = (int64_t)var_GetInteger( p_demux, "fake-caching" ) * 1000;
return VLC_SUCCESS;
case DEMUX_GET_POSITION:
if( p_sys->i_duration <= 0 )
return VLC_EGENERIC;
pf = (double*)va_arg( args, double* );
*pf = (double)( p_sys->i_last_pts - p_sys->i_first_pts )
/ (double)(p_sys->i_duration);
return VLC_SUCCESS;
case DEMUX_SET_POSITION:
if( p_sys->i_duration <= 0 )
return VLC_EGENERIC;
f = (double)va_arg( args, double );
i64 = f * (double)p_sys->i_duration;
p_sys->i_first_pts = p_sys->i_last_pts - i64;
p_sys->i_end_pts = p_sys->i_first_pts + p_sys->i_duration;
return VLC_SUCCESS;
case DEMUX_GET_TIME:
pi64 = (int64_t *)va_arg( args, int64_t * );
*pi64 = p_sys->i_last_pts - p_sys->i_first_pts;
return VLC_SUCCESS;
case DEMUX_GET_LENGTH:
if( p_sys->i_duration <= 0 )
return VLC_EGENERIC;
pi64 = (int64_t*)va_arg( args, int64_t * );
*pi64 = p_sys->i_duration;
return VLC_SUCCESS;
case DEMUX_SET_TIME:
i64 = (int64_t)va_arg( args, int64_t );
p_sys->i_first_pts = p_sys->i_last_pts - i64;
p_sys->i_end_pts = p_sys->i_first_pts + p_sys->i_duration;
return VLC_SUCCESS;
/* TODO implement others */
default:
return VLC_EGENERIC;
}
return VLC_EGENERIC;
}
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( !p_sys->i_last_pts )
{
p_sys->i_last_pts = p_sys->i_first_pts = mdate();
if ( p_sys->i_duration )
p_sys->i_end_pts = p_sys->i_first_pts + p_sys->i_duration;
}
else
{
p_sys->i_last_pts += (mtime_t)(1000000.0 / p_sys->f_fps);
if ( p_sys->i_duration && p_sys->i_last_pts > p_sys->i_end_pts )
return 0;
mwait( p_sys->i_last_pts );
}
block_t *p_block = block_New( p_demux, 1 );
p_block->i_flags |= BLOCK_FLAG_TYPE_I;
p_block->i_dts = p_block->i_pts = p_sys->i_last_pts;
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
es_out_Send( p_demux->out, p_sys->p_es_video, p_block );
return 1;
}
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