file.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:7k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * file.c
- *****************************************************************************
- * Copyright (C) 2001, 2002 the VideoLAN team
- * $Id: 7639a0be8119b6193dcea0e5cfe7c6e821e499b8 $
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <time.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include <vlc_sout.h>
- #include <vlc_block.h>
- #include <vlc_charset.h>
- #include "vlc_strings.h"
- #if defined( WIN32 ) && !defined( UNDER_CE )
- # include <io.h>
- # define lseek _lseeki64
- #else
- # include <unistd.h>
- #endif
- #ifndef O_LARGEFILE
- # define O_LARGEFILE 0
- #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( N_("File stream output") )
- set_shortname( N_("File" ))
- set_capability( "sout access", 50 )
- set_category( CAT_SOUT )
- set_subcategory( SUBCAT_SOUT_ACO )
- add_shortcut( "file" )
- add_shortcut( "stream" )
- add_bool( SOUT_CFG_PREFIX "append", 0, NULL, APPEND_TEXT,APPEND_LONGTEXT,
- true )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static const char *const ppsz_sout_options[] = {
- "append", NULL
- };
- static ssize_t Write( sout_access_out_t *, block_t * );
- static int Seek ( sout_access_out_t *, off_t );
- static ssize_t Read ( sout_access_out_t *, block_t * );
- static int Control( sout_access_out_t *, int, va_list );
- 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 fd;
- config_ChainParse( p_access, SOUT_CFG_PREFIX, ppsz_sout_options, p_access->p_cfg );
- if( !p_access->psz_path )
- {
- msg_Err( p_access, "no file name specified" );
- return VLC_EGENERIC;
- }
- bool append = var_GetBool( p_access, SOUT_CFG_PREFIX "append" );
- if( !strcmp( p_access->psz_path, "-" ) )
- {
- #ifndef UNDER_CE
- #ifdef WIN32
- setmode (fileno (stdout), O_BINARY);
- #endif
- fd = dup (fileno (stdout));
- msg_Dbg( p_access, "using stdout" );
- #else
- #warning stdout is not supported on Windows Mobile, but may be used on Windows CE
- fd = -1;
- #endif
- }
- else
- {
- char *psz_tmp = str_format( p_access, p_access->psz_path );
- path_sanitize( psz_tmp );
- fd = utf8_open( psz_tmp, O_RDWR | O_CREAT | O_LARGEFILE |
- (append ? 0 : O_TRUNC), 0666 );
- free( psz_tmp );
- }
- if (fd == -1)
- {
- msg_Err( p_access, "cannot open `%s' (%m)", p_access->psz_path );
- return VLC_EGENERIC;
- }
- p_access->pf_write = Write;
- p_access->pf_read = Read;
- p_access->pf_seek = Seek;
- p_access->pf_control = Control;
- p_access->p_sys = (void *)(intptr_t)fd;
- msg_Dbg( p_access, "file access output opened (%s)", p_access->psz_path );
- if (append)
- lseek (fd, 0, SEEK_END);
- 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;
- close( (intptr_t)p_access->p_sys );
- msg_Dbg( p_access, "file access output closed" );
- }
- static int Control( sout_access_out_t *p_access, int i_query, va_list args )
- {
- switch( i_query )
- {
- case ACCESS_OUT_CONTROLS_PACE:
- {
- bool *pb = va_arg( args, bool * );
- *pb = strcmp( p_access->psz_access, "stream" );
- break;
- }
- default:
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Read: standard read on a file descriptor.
- *****************************************************************************/
- static ssize_t Read( sout_access_out_t *p_access, block_t *p_buffer )
- {
- ssize_t val;
- do
- val = read( (intptr_t)p_access->p_sys, p_buffer->p_buffer,
- p_buffer->i_buffer );
- while (val == -1 && errno == EINTR);
- return val;
- }
- /*****************************************************************************
- * Write: standard write on a file descriptor.
- *****************************************************************************/
- static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
- {
- size_t i_write = 0;
- while( p_buffer )
- {
- ssize_t val = write ((intptr_t)p_access->p_sys,
- p_buffer->p_buffer, p_buffer->i_buffer);
- if (val == -1)
- {
- if (errno == EINTR)
- continue;
- block_ChainRelease (p_buffer);
- return -1;
- }
- if ((size_t)val >= p_buffer->i_buffer)
- {
- block_t *p_next = p_buffer->p_next;
- block_Release (p_buffer);
- p_buffer = p_next;
- }
- else
- {
- p_buffer->p_buffer += val;
- p_buffer->i_buffer -= val;
- }
- i_write += val;
- }
- 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 )
- {
- return lseek( (intptr_t)p_access->p_sys, i_pos, SEEK_SET );
- }