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/*****************************************************************************
* mpjpeg.c: mime multipart jpeg muxer module for vlc
*****************************************************************************
* Copyright (C) 2001, 2002, 2006 VLC authors and VideoLAN
* $Id$
*
* Authors: Sigmund Augdal Helberg <dnumgis@videolan.org>
*
* This program 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.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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_sout.h>
#include <vlc_block.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
#define SOUT_CFG_PREFIX "sout-mpjpeg-"
vlc_module_begin ()
set_shortname( "MPJPEG" )
set_description( N_("Multipart JPEG muxer") )
set_capability( "sout mux", 5 )
set_category( CAT_SOUT )
set_subcategory( SUBCAT_SOUT_MUX )
set_callbacks( Open, Close )
add_shortcut( "mpjpeg" )
vlc_module_end ()
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static int Control ( sout_mux_t *, int, va_list );
static int AddStream( sout_mux_t *, sout_input_t * );
static void DelStream( sout_mux_t *, sout_input_t * );
static int Mux ( sout_mux_t * );
/* This pseudo-random sequence is unlikely to ever happen */
/* This should be the same as in src/network/httpd.c */
#define BOUNDARY "7b3cc56e5f51db803f790dad720ed50a"
/*****************************************************************************
* Open:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
sout_mux_t *p_mux = (sout_mux_t*)p_this;
msg_Dbg( p_mux, "Multipart jpeg muxer opened" );
p_mux->pf_control = Control;
p_mux->pf_addstream = AddStream;
p_mux->pf_delstream = DelStream;
p_mux->pf_mux = Mux;
p_mux->p_sys = NULL;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
/* TODO: send the ending boundary ("\r\n--"BOUNDARY"--\r\n"),
* but is the access_output still usable?? */
msg_Dbg( p_this, "Multipart jpeg muxer closed" );
}
static int Control( sout_mux_t *p_mux, int i_query, va_list args )
{
VLC_UNUSED(p_mux);
bool *pb_bool;
char **ppsz;
switch( i_query )
{
case MUX_CAN_ADD_STREAM_WHILE_MUXING:
pb_bool = va_arg( args, bool * );
*pb_bool = true;
return VLC_SUCCESS;
case MUX_GET_ADD_STREAM_WAIT:
pb_bool = va_arg( args, bool * );
*pb_bool = true;
return VLC_SUCCESS;
case MUX_GET_MIME:
ppsz = va_arg( args, char ** );
*ppsz = strdup( "multipart/x-mixed-replace; boundary="BOUNDARY );
return VLC_SUCCESS;
default:
return VLC_EGENERIC;
}
}
static int AddStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
if( p_mux->i_nb_inputs > 1 )
{
msg_Dbg( p_mux, "only 1 input allowed" );
return VLC_EGENERIC;
}
msg_Dbg( p_mux, "adding input" );
if( p_input->p_fmt->i_codec != VLC_CODEC_MJPG )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
static void DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
VLC_UNUSED(p_input);
msg_Dbg( p_mux, "removing input" );
}
static int Mux( sout_mux_t *p_mux )
{
block_fifo_t *p_fifo;
if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
p_fifo = p_mux->pp_inputs[0]->p_fifo;
while( block_FifoCount( p_fifo ) > 0 )
{
static const char psz_hfmt[] = "\r\n"
"--"BOUNDARY"\r\n"
"Content-Type: image/jpeg\r\n"
"Content-Length: %zu\r\n"
"\r\n";
block_t *p_data = block_FifoGet( p_fifo );
block_t *p_header = block_Alloc( sizeof( psz_hfmt ) + 20 );
if( p_header == NULL ) /* uho! */
{
block_Release( p_data );
continue;
}
p_header->i_buffer =
snprintf( (char *)p_header->p_buffer, p_header->i_buffer,
psz_hfmt, p_data->i_buffer );
p_header->i_flags |= BLOCK_FLAG_HEADER;
sout_AccessOutWrite( p_mux->p_access, p_header );
sout_AccessOutWrite( p_mux->p_access, p_data );
}
return VLC_SUCCESS;
}
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