file.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * file.c
- *****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: file.c 8164 2004-07-10 17:22:35Z fenrir $
- *
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
- * Eric Petit <titer@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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <string.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <vlc/vlc.h>
- #include <vlc/sout.h>
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #elif defined( WIN32 ) && !defined( UNDER_CE )
- # include <io.h>
- #endif
- /* For those platforms that don't use these */
- #ifndef S_IRGRP
- # define S_IRGRP 0
- #endif
- #ifndef S_IROTH
- # define S_IROTH 0
- #endif
- #ifndef STDOUT_FILENO
- # define STDOUT_FILENO 1
- #endif
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define SOUT_CFG_PREFIX "sout-file-"
- #define APPEND_TEXT N_("Append to file")
- #define APPEND_LONGTEXT N_( "Append to file if it exists instead "
- "of replacing it.")
- vlc_module_begin();
- set_description( _("File stream output") );
- set_capability( "sout access", 50 );
- add_shortcut( "file" );
- add_shortcut( "stream" );
- add_bool( SOUT_CFG_PREFIX "append", 0, NULL, APPEND_TEXT,APPEND_LONGTEXT,
- VLC_TRUE );
- set_callbacks( Open, Close );
- vlc_module_end();
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static const char *ppsz_sout_options[] = {
- "append", NULL
- };
- static int Write( sout_access_out_t *, block_t * );
- static int Seek ( sout_access_out_t *, off_t );
- static int Read ( sout_access_out_t *, block_t * );
- struct sout_access_out_sys_t
- {
- int i_handle;
- };
- /*****************************************************************************
- * Open: open the file
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- sout_access_out_t *p_access = (sout_access_out_t*)p_this;
- int i_flags;
- vlc_value_t val;
- sout_CfgParse( p_access, SOUT_CFG_PREFIX, ppsz_sout_options, p_access->p_cfg );
- if( !( p_access->p_sys = malloc( sizeof( sout_access_out_sys_t ) ) ) )
- {
- msg_Err( p_access, "out of memory" );
- return( VLC_EGENERIC );
- }
- if( !p_access->psz_name )
- {
- msg_Err( p_access, "no file name specified" );
- return VLC_EGENERIC;
- }
- i_flags = O_RDWR|O_CREAT;
- var_Get( p_access, SOUT_CFG_PREFIX "append", &val );
- if( val.b_bool )
- {
- i_flags |= O_APPEND;
- }
- else
- {
- i_flags |= O_TRUNC;
- }
- if( !strcmp( p_access->psz_name, "-" ) )
- {
- p_access->p_sys->i_handle = STDOUT_FILENO;
- msg_Dbg( p_access, "using stdout" );
- }
- else if( ( p_access->p_sys->i_handle =
- open( p_access->psz_name, i_flags,
- S_IWRITE | S_IREAD | S_IRGRP | S_IROTH ) ) == -1 )
- {
- msg_Err( p_access, "cannot open `%s'", p_access->psz_name );
- free( p_access->p_sys );
- return( VLC_EGENERIC );
- }
- p_access->pf_write = Write;
- p_access->pf_read = Read;
- p_access->pf_seek = Seek;
- msg_Dbg( p_access, "file access output opened (`%s')", p_access->psz_name );
- /* Update pace control flag */
- if( p_access->psz_access && !strcmp( p_access->psz_access, "stream" ) )
- p_access->p_sout->i_out_pace_nocontrol++;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Close: close the target
- *****************************************************************************/
- static void Close( vlc_object_t * p_this )
- {
- sout_access_out_t *p_access = (sout_access_out_t*)p_this;
- if( strcmp( p_access->psz_name, "-" ) )
- {
- if( p_access->p_sys->i_handle )
- {
- close( p_access->p_sys->i_handle );
- }
- }
- free( p_access->p_sys );
- /* Update pace control flag */
- if( p_access->psz_access && !strcmp( p_access->psz_access, "stream" ) )
- p_access->p_sout->i_out_pace_nocontrol--;
- msg_Dbg( p_access, "file access output closed" );
- }
- /*****************************************************************************
- * Read: standard read on a file descriptor.
- *****************************************************************************/
- static int Read( sout_access_out_t *p_access, block_t *p_buffer )
- {
- if( strcmp( p_access->psz_name, "-" ) )
- {
- return read( p_access->p_sys->i_handle, p_buffer->p_buffer,
- p_buffer->i_buffer );
- }
- msg_Err( p_access, "cannot read while using stdout" );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * Write: standard write on a file descriptor.
- *****************************************************************************/
- static int Write( sout_access_out_t *p_access, block_t *p_buffer )
- {
- size_t i_write = 0;
- while( p_buffer )
- {
- block_t *p_next = p_buffer->p_next;;
- i_write += write( p_access->p_sys->i_handle,
- p_buffer->p_buffer, p_buffer->i_buffer );
- block_Release( p_buffer );
- p_buffer = p_next;
- }
- return i_write;
- }
- /*****************************************************************************
- * Seek: seek to a specific location in a file
- *****************************************************************************/
- static int Seek( sout_access_out_t *p_access, off_t i_pos )
- {
- if( strcmp( p_access->psz_name, "-" ) )
- {
- #if defined( WIN32 ) && !defined( UNDER_CE )
- return( _lseeki64( p_access->p_sys->i_handle, i_pos, SEEK_SET ) );
- #else
- return( lseek( p_access->p_sys->i_handle, i_pos, SEEK_SET ) );
- #endif
- }
- else
- {
- msg_Err( p_access, "cannot seek while using stdout" );
- return VLC_EGENERIC;
- }
- }