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mpjpeg.c
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/*****************************************************************************
* mpjpeg.c: mime multipart jpeg muxer module for vlc
*****************************************************************************
* Copyright (C) 2001, 2002 VideoLAN
* $Id: dummy.c 7047 2004-03-11 17:37:50Z fenrir $
*
* Authors: Sigmund Augdal <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/sout.h>
#define SEPARATOR_TEXT N_( "Multipart separator string" )
#define SEPARATOR_LONGTEXT N_( "Multipart strings like MPJPEG use a " \
"separator string betwen content pieces. "\
"You can select this string. Default is "\
"--myboundary" )
#define CONTENT_TYPE "Content-Type: image/jpeg"
/*****************************************************************************
* 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( _("Multipart jpeg muxer") );
set_capability( "sout mux", 5 );
add_string( SOUT_CFG_PREFIX "separator", "--myboundary", NULL,
SEPARATOR_TEXT, SEPARATOR_LONGTEXT, VLC_TRUE );
set_category( CAT_SOUT );
set_subcategory( SUBCAT_SOUT_MUX );
set_callbacks( Open, Close );
add_shortcut( "mpjpeg" );
vlc_module_end();
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static const char *ppsz_sout_options[] = { "separator", NULL };
static int Control ( sout_mux_t *, int, va_list );
static int AddStream( sout_mux_t *, sout_input_t * );
static int DelStream( sout_mux_t *, sout_input_t * );
static int Mux ( sout_mux_t * );
struct sout_mux_sys_t
{
block_t *p_separator;
vlc_bool_t b_send_headers;
};
/*****************************************************************************
* Open:
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
int i_size;
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys;
char *psz_separator_block, *psz_separator;
msg_Dbg( p_mux, "Multipart jpeg muxer opened" );
sout_CfgParse( p_mux, SOUT_CFG_PREFIX, ppsz_sout_options, p_mux->p_cfg );
p_sys = p_mux->p_sys = malloc( sizeof(sout_mux_sys_t) );
p_sys->b_send_headers = VLC_TRUE;
psz_separator = var_GetString( p_mux, SOUT_CFG_PREFIX "separator" );
i_size = strlen( psz_separator ) + 2 + 2 + 2 + strlen( CONTENT_TYPE );
psz_separator_block = (char*)malloc( i_size );
sprintf( psz_separator_block, "\r\n%s\r\n%s\r\n", psz_separator,
CONTENT_TYPE );
p_sys->p_separator = block_New( p_mux, i_size );
memcpy( p_sys->p_separator->p_buffer, psz_separator_block , i_size );
if( psz_separator_block ) free( psz_separator_block );
p_mux->pf_control = Control;
p_mux->pf_addstream = AddStream;
p_mux->pf_delstream = DelStream;
p_mux->pf_mux = Mux;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close:
*****************************************************************************/
static void Close( vlc_object_t * p_this )
{
sout_mux_t *p_mux = (sout_mux_t*)p_this;
sout_mux_sys_t *p_sys = p_mux->p_sys;
msg_Dbg( p_mux, "Multipart jpeg muxer closed" );
block_Release( p_sys->p_separator );
free( p_sys );
}
static int Control( sout_mux_t *p_mux, int i_query, va_list args )
{
vlc_bool_t *pb_bool;
char **ppsz;
switch( i_query )
{
case MUX_CAN_ADD_STREAM_WHILE_MUXING:
pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
*pb_bool = VLC_TRUE;
return VLC_SUCCESS;
case MUX_GET_ADD_STREAM_WAIT:
pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
*pb_bool = VLC_TRUE;
return VLC_SUCCESS;
case MUX_GET_MIME:
ppsz = (char**)va_arg( args, char ** );
*ppsz = strdup( "multipart/x-mixed-replace; boundary=This Random String" );
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_FOURCC('M','J','P','G') &&
p_input->p_fmt->i_codec != VLC_FOURCC('m','j','p','g') &&
p_input->p_fmt->i_codec != VLC_FOURCC('j','p','e','g') &&
p_input->p_fmt->i_codec != VLC_FOURCC('J','P','E','G') &&
p_input->p_fmt->i_codec != VLC_FOURCC('J','F','I','F') &&
p_input->p_fmt->i_codec != VLC_FOURCC('J','P','G','L') &&
p_input->p_fmt->i_codec != VLC_FOURCC('m','j','p','a') )
{
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
static int DelStream( sout_mux_t *p_mux, sout_input_t *p_input )
{
msg_Dbg( p_mux, "removing input" );
return VLC_SUCCESS;
}
static int Mux( sout_mux_t *p_mux )
{
block_fifo_t *p_fifo;
sout_mux_sys_t *p_sys = p_mux->p_sys;
int i_count;
/* Content-Length:.......\r\n */
char psz_content_length[25];
if( p_sys->b_send_headers )
{
block_t *p_header;
char *psz_separator = var_CreateGetString( p_mux,
SOUT_CFG_PREFIX "separator" );
char *psz_separator_block = (char *)malloc( strlen( psz_separator ) +
2 + strlen( CONTENT_TYPE ) );
sprintf( psz_separator_block, "%s\r\n%s\r\n", psz_separator,
CONTENT_TYPE );
p_header = block_New( p_mux, strlen( psz_separator_block ) );
memcpy( p_header->p_buffer, psz_separator_block ,
strlen( psz_separator_block ) );
p_header->i_flags |= BLOCK_FLAG_HEADER;
sout_AccessOutWrite( p_mux->p_access, p_header );
p_sys->b_send_headers = VLC_FALSE;
if( psz_separator_block ) free( psz_separator_block );
}
if( !p_mux->i_nb_inputs ) return VLC_SUCCESS;
p_fifo = p_mux->pp_inputs[0]->p_fifo;
i_count = p_fifo->i_depth;
while( i_count > 0 )
{
block_t *p_length = block_New( p_mux, 25 );
block_t *p_data = block_FifoGet( p_fifo );
sout_AccessOutWrite( p_mux->p_access,
block_Duplicate( p_sys->p_separator ) );
memset( psz_content_length, 0, 25 );
snprintf( psz_content_length, 25, "Content-Length: %i\r\n\r\n",
p_data->i_buffer );
memcpy( p_length->p_buffer, psz_content_length, 25 );
sout_AccessOutWrite( p_mux->p_access, p_length );
sout_AccessOutWrite( p_mux->p_access, p_data );
i_count--;
}
return VLC_SUCCESS;
}