access.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:11k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * access.c: Real rtsp input
- *****************************************************************************
- * Copyright (C) 2005 VideoLAN
- * $Id: 0115d30ad77641c7427bf22afed52e14b3e6ee6a $
- *
- * Authors: Gildas Bazin <gbazin@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_access.h>
- #include <vlc_dialog.h>
- #include <vlc_network.h>
- #include "rtsp.h"
- #include "real.h"
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define CACHING_TEXT N_("Caching value (ms)")
- #define CACHING_LONGTEXT N_(
- "Caching value for RTSP streams. This "
- "value should be set in milliseconds." )
- vlc_module_begin ()
- set_description( N_("Real RTSP") )
- set_shortname( N_("Real RTSP") )
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_ACCESS )
- add_integer( "realrtsp-caching", 3000, NULL,
- CACHING_TEXT, CACHING_LONGTEXT, true )
- change_safe()
- set_capability( "access", 10 )
- set_callbacks( Open, Close )
- add_shortcut( "realrtsp" )
- add_shortcut( "rtsp" )
- add_shortcut( "pnm" )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static block_t *BlockRead( access_t * );
- static int Seek( access_t *, int64_t );
- static int Control( access_t *, int, va_list );
- struct access_sys_t
- {
- bool b_seekable;
- bool b_pace_control;
- rtsp_client_t *p_rtsp;
- int fd;
- block_t *p_header;
- };
- /*****************************************************************************
- * Network wrappers
- *****************************************************************************/
- static int RtspConnect( void *p_userdata, char *psz_server, int i_port )
- {
- access_t *p_access = (access_t *)p_userdata;
- access_sys_t *p_sys = p_access->p_sys;
- /* Open connection */
- p_sys->fd = net_ConnectTCP( p_access, psz_server, i_port );
- if( p_sys->fd < 0 )
- {
- msg_Err( p_access, "cannot connect to %s:%d", psz_server, i_port );
- dialog_Fatal( p_access, _("Connection failed"),
- _("VLC could not connect to "%s:%d"."), psz_server, i_port );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- static int RtspDisconnect( void *p_userdata )
- {
- access_t *p_access = (access_t *)p_userdata;
- access_sys_t *p_sys = p_access->p_sys;
- net_Close( p_sys->fd );
- return VLC_SUCCESS;
- }
- static int RtspRead( void *p_userdata, uint8_t *p_buffer, int i_buffer )
- {
- access_t *p_access = (access_t *)p_userdata;
- access_sys_t *p_sys = p_access->p_sys;
- return net_Read( p_access, p_sys->fd, 0, p_buffer, i_buffer, true );
- }
- static int RtspReadLine( void *p_userdata, uint8_t *p_buffer, int i_buffer )
- {
- access_t *p_access = (access_t *)p_userdata;
- access_sys_t *p_sys = p_access->p_sys;
- char *psz = net_Gets( VLC_OBJECT(p_access), p_sys->fd, 0 );
- //fprintf(stderr, "ReadLine: %sn", psz);
- if( psz ) strncpy( (char *)p_buffer, psz, i_buffer );
- else *p_buffer = 0;
- free( psz );
- return 0;
- }
- static int RtspWrite( void *p_userdata, uint8_t *p_buffer, int i_buffer )
- {
- access_t *p_access = (access_t *)p_userdata;
- access_sys_t *p_sys = p_access->p_sys;
- //fprintf(stderr, "Write: %s", p_buffer);
- net_Printf( VLC_OBJECT(p_access), p_sys->fd, 0, "%s", p_buffer );
- return 0;
- }
- /*****************************************************************************
- * Open: open the rtsp connection
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t *)p_this;
- access_sys_t *p_sys;
- char* psz_server = NULL;
- int i_result;
- if( !p_access->psz_access || (
- strncmp( p_access->psz_access, "rtsp", 4 ) &&
- strncmp( p_access->psz_access, "pnm", 3 ) &&
- strncmp( p_access->psz_access, "realrtsp", 8 ) ))
- {
- return VLC_EGENERIC;
- }
- p_access->pf_read = NULL;
- p_access->pf_block = BlockRead;
- p_access->pf_seek = Seek;
- p_access->pf_control = Control;
- p_access->info.i_update = 0;
- p_access->info.i_size = 0;
- p_access->info.i_pos = 0;
- p_access->info.b_eof = false;
- p_access->info.i_title = 0;
- p_access->info.i_seekpoint = 0;
- p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
- if( !p_sys )
- return VLC_ENOMEM;
- p_sys->p_rtsp = malloc( sizeof( rtsp_client_t) );
- if( !p_sys->p_rtsp )
- {
- free( p_sys );
- return VLC_ENOMEM;
- }
- p_sys->p_header = NULL;
- p_sys->p_rtsp->p_userdata = p_access;
- p_sys->p_rtsp->pf_connect = RtspConnect;
- p_sys->p_rtsp->pf_disconnect = RtspDisconnect;
- p_sys->p_rtsp->pf_read = RtspRead;
- p_sys->p_rtsp->pf_read_line = RtspReadLine;
- p_sys->p_rtsp->pf_write = RtspWrite;
- i_result = rtsp_connect( p_sys->p_rtsp, p_access->psz_path, 0 );
- if( i_result )
- {
- msg_Dbg( p_access, "could not connect to: %s", p_access->psz_path );
- free( p_sys->p_rtsp );
- p_sys->p_rtsp = NULL;
- goto error;
- }
- msg_Dbg( p_access, "rtsp connected" );
- /* looking for server type */
- if( rtsp_search_answers( p_sys->p_rtsp, "Server" ) )
- psz_server = strdup( rtsp_search_answers( p_sys->p_rtsp, "Server" ) );
- else
- {
- if( rtsp_search_answers( p_sys->p_rtsp, "RealChallenge1" ) )
- psz_server = strdup("Real");
- else
- psz_server = strdup("unknown");
- }
- if( strstr( psz_server, "Real" ) || strstr( psz_server, "Helix" ) )
- {
- uint32_t bandwidth = 10485800;
- rmff_header_t *h;
- msg_Dbg( p_access, "found a real/helix rtsp server" );
- if( !(h = real_setup_and_get_header( p_sys->p_rtsp, bandwidth )) )
- {
- /* Check if we got a redirect */
- if( rtsp_search_answers( p_sys->p_rtsp, "Location" ) )
- {
- msg_Dbg( p_access, "redirect: %s",
- rtsp_search_answers(p_sys->p_rtsp, "Location") );
- msg_Warn( p_access, "redirect not supported" );
- goto error;
- }
- msg_Err( p_access, "rtsp session can not be established" );
- dialog_Fatal( p_access, _("Session failed"),
- _("The requested RTSP session could not be established.") );
- goto error;
- }
- p_sys->p_header = block_New( p_access, 4096 );
- p_sys->p_header->i_buffer =
- rmff_dump_header( h, (char *)p_sys->p_header->p_buffer, 1024 );
- rmff_free_header( h );
- }
- else
- {
- msg_Warn( p_access, "only real/helix rtsp servers supported for now" );
- goto error;
- }
- /* Update default_pts to a suitable value for file access */
- var_Create( p_access, "realrtsp-caching",
- VLC_VAR_INTEGER | VLC_VAR_DOINHERIT);
- free( psz_server );
- return VLC_SUCCESS;
- error:
- free( psz_server );
- Close( p_this );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * Close: close the target
- *****************************************************************************/
- static void Close( vlc_object_t * p_this )
- {
- access_t *p_access = (access_t*)p_this;
- access_sys_t *p_sys = p_access->p_sys;
- if( p_sys->p_rtsp ) rtsp_close( p_sys->p_rtsp );
- free( p_sys->p_rtsp );
- free( p_sys );
- }
- /*****************************************************************************
- * Read: standard read on a file descriptor.
- *****************************************************************************/
- static block_t *BlockRead( access_t *p_access )
- {
- access_sys_t *p_sys = p_access->p_sys;
- block_t *p_block;
- rmff_pheader_t pheader;
- int i_size;
- if( p_sys->p_header )
- {
- p_block = p_sys->p_header;
- p_sys->p_header = NULL;
- return p_block;
- }
- i_size = real_get_rdt_chunk_header( p_access->p_sys->p_rtsp, &pheader );
- if( i_size <= 0 ) return NULL;
- p_block = block_New( p_access, i_size );
- p_block->i_buffer = real_get_rdt_chunk( p_access->p_sys->p_rtsp, &pheader,
- &p_block->p_buffer );
- return p_block;
- }
- /*****************************************************************************
- * Seek: seek to a specific location in a file
- *****************************************************************************/
- static int Seek( access_t *p_access, int64_t i_pos )
- {
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( access_t *p_access, int i_query, va_list args )
- {
- bool *pb_bool;
- int64_t *pi_64;
- switch( i_query )
- {
- /* */
- case ACCESS_CAN_SEEK:
- case ACCESS_CAN_FASTSEEK:
- pb_bool = (bool*)va_arg( args, bool* );
- *pb_bool = false;//p_sys->b_seekable;
- break;
- case ACCESS_CAN_PAUSE:
- pb_bool = (bool*)va_arg( args, bool* );
- *pb_bool = false;
- break;
- case ACCESS_CAN_CONTROL_PACE:
- pb_bool = (bool*)va_arg( args, bool* );
- *pb_bool = true;//p_sys->b_pace_control;
- break;
- case ACCESS_GET_PTS_DELAY:
- pi_64 = (int64_t*)va_arg( args, int64_t * );
- *pi_64 = var_GetInteger( p_access, "realrtsp-caching" ) * 1000;
- break;
- /* */
- case ACCESS_SET_PAUSE_STATE:
- /* Nothing to do */
- break;
- case ACCESS_GET_TITLE_INFO:
- case ACCESS_SET_TITLE:
- case ACCESS_SET_SEEKPOINT:
- case ACCESS_SET_PRIVATE_ID_STATE:
- case ACCESS_GET_META:
- case ACCESS_GET_CONTENT_TYPE:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }