mpjpeg.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:6k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * mpjpeg.c: mime multipart jpeg muxer module for vlc
- *****************************************************************************
- * Copyright (C) 2001, 2002, 2006 the VideoLAN team
- * $Id: 1511373046365afbf98d7e8e9c8a82055706cc28 $
- *
- * 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 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_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 )
- add_obsolete_string( SOUT_CFG_PREFIX "separator" )
- 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 int 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 ("rn--"BOUNDARY"--rn"),
- * but is the access_output still useable?? */
- 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 = (bool*)va_arg( args, bool * );
- *pb_bool = true;
- return VLC_SUCCESS;
- case MUX_GET_ADD_STREAM_WAIT:
- pb_bool = (bool*)va_arg( args, bool * );
- *pb_bool = true;
- return VLC_SUCCESS;
- case MUX_GET_MIME:
- ppsz = (char**)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_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 )
- {
- VLC_UNUSED(p_input);
- msg_Dbg( p_mux, "removing input" );
- return VLC_SUCCESS;
- }
- 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[] = "rn"
- "--"BOUNDARY"rn"
- "Content-Type: image/jpegrn"
- "Content-Length: %zurn"
- "rn";
- block_t *p_data = block_FifoGet( p_fifo );
- block_t *p_header = block_New( p_mux, 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;
- }