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346 lines
11 KiB
346 lines
11 KiB
/*****************************************************************************
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* file.c: file input (file: access plug-in)
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*****************************************************************************
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* Copyright (C) 2001, 2002 VideoLAN
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* $Id: file.c,v 1.12 2003/03/03 14:21:08 gbazin Exp $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <vlc/input.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef HAVE_ERRNO_H
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# include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#elif defined( WIN32 ) && !defined( UNDER_CE )
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# include <io.h>
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#endif
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/*****************************************************************************
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* Exported prototypes
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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static void Seek ( input_thread_t *, off_t );
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static ssize_t Read ( input_thread_t *, byte_t *, size_t );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define CACHING_TEXT N_("caching value in ms")
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#define CACHING_LONGTEXT N_( \
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"Allows you to modify the default caching value for file streams. This " \
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"value should be set in miliseconds units." )
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vlc_module_begin();
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set_description( _("Standard filesystem file reading") );
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add_category_hint( N_("file"), NULL, VLC_TRUE );
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add_integer( "file-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
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set_capability( "access", 50 );
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add_shortcut( "file" );
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add_shortcut( "stream" );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* _input_socket_t: private access plug-in data, modified to add private
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* fields
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*****************************************************************************/
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typedef struct _input_socket_s
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{
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input_socket_t _socket;
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unsigned int i_nb_reads;
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} _input_socket_t;
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/*****************************************************************************
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* Open: open the file
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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input_thread_t * p_input = (input_thread_t *)p_this;
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char * psz_name = p_input->psz_name;
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#ifdef HAVE_SYS_STAT_H
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int i_stat;
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struct stat stat_info;
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#endif
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_input_socket_t * p_access_data;
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vlc_bool_t b_stdin;
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p_input->i_mtu = 0;
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b_stdin = psz_name[0] == '-' && psz_name[1] == '\0';
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#ifdef HAVE_SYS_STAT_H
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if( !b_stdin && (i_stat = stat( psz_name, &stat_info )) == (-1) )
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{
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# ifdef HAVE_ERRNO_H
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msg_Warn( p_input, "cannot stat() file `%s' (%s)",
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psz_name, strerror(errno));
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# else
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msg_Warn( p_input, "cannot stat() file `%s'", psz_name );
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# endif
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return VLC_EGENERIC;
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}
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#endif
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p_input->pf_read = Read;
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p_input->pf_set_program = input_SetProgram;
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p_input->pf_set_area = NULL;
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p_input->pf_seek = Seek;
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vlc_mutex_lock( &p_input->stream.stream_lock );
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p_input->stream.b_connected = 1;
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if( *p_input->psz_access && !strncmp( p_input->psz_access, "stream", 7 ) )
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{
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/* stream:%s */
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p_input->stream.b_pace_control = 0;
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p_input->stream.b_seekable = 0;
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p_input->stream.p_selected_area->i_size = 0;
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}
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else
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{
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/* file:%s or %s */
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p_input->stream.b_pace_control = 1;
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if( b_stdin )
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{
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p_input->stream.b_seekable = 0;
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p_input->stream.p_selected_area->i_size = 0;
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}
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#ifdef UNDER_CE
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else if( VLC_TRUE )
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{
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/* We'll update i_size after it's been opened */
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p_input->stream.b_seekable = 1;
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}
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#elif defined( HAVE_SYS_STAT_H )
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else if( S_ISREG(stat_info.st_mode) || S_ISCHR(stat_info.st_mode)
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|| S_ISBLK(stat_info.st_mode) )
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{
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p_input->stream.b_seekable = 1;
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p_input->stream.p_selected_area->i_size = stat_info.st_size;
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}
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else if( S_ISFIFO(stat_info.st_mode)
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# if !defined( SYS_BEOS ) && !defined( WIN32 )
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|| S_ISSOCK(stat_info.st_mode)
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# endif
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)
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{
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p_input->stream.b_seekable = 0;
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p_input->stream.p_selected_area->i_size = 0;
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}
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#endif
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else
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{
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vlc_mutex_unlock( &p_input->stream.stream_lock );
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msg_Err( p_input, "unknown file type for `%s'", psz_name );
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return VLC_EGENERIC;
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}
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}
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p_input->stream.p_selected_area->i_tell = 0;
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p_input->stream.i_method = INPUT_METHOD_FILE;
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vlc_mutex_unlock( &p_input->stream.stream_lock );
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msg_Dbg( p_input, "opening file `%s'", psz_name );
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p_access_data = malloc( sizeof(_input_socket_t) );
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p_input->p_access_data = (void *)p_access_data;
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if( p_access_data == NULL )
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{
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msg_Err( p_input, "out of memory" );
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return VLC_ENOMEM;
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}
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p_access_data->i_nb_reads = 0;
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if( b_stdin )
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{
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p_access_data->_socket.i_handle = 0;
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}
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else
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{
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#ifdef UNDER_CE
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wchar_t psz_filename[MAX_PATH];
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MultiByteToWideChar( CP_ACP, 0, psz_name, -1, psz_filename, MAX_PATH );
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p_access_data->_socket.i_handle = (int)CreateFile( psz_filename,
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GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, NULL );
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if( (HANDLE)p_access_data->_socket.i_handle == INVALID_HANDLE_VALUE )
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{
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msg_Err( p_input, "cannot open file %s", psz_name );
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free( p_access_data );
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return VLC_EGENERIC;
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}
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p_input->stream.p_selected_area->i_size =
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GetFileSize( (HANDLE)p_access_data->_socket.i_handle, NULL );
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#else
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p_access_data->_socket.i_handle = open( psz_name,
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O_NONBLOCK /*| O_LARGEFILE*/ );
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if( p_access_data->_socket.i_handle == -1 )
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{
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# ifdef HAVE_ERRNO_H
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msg_Err( p_input, "cannot open file %s (%s)", psz_name,
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strerror(errno) );
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# else
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msg_Err( p_input, "cannot open file %s", psz_name );
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# endif
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free( p_access_data );
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return VLC_EGENERIC;
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}
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#endif
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}
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if ( p_input->stream.b_seekable
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&& !p_input->stream.p_selected_area->i_size )
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{
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msg_Err( p_input, "file %s is empty, aborting", psz_name );
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free( p_access_data );
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return VLC_EGENERIC;
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}
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/* Update default_pts to a suitable value for file access */
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p_input->i_pts_delay = config_GetInt( p_input, "file-caching" ) * 1000;
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Close: close the target
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*****************************************************************************/
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static void Close( vlc_object_t * p_this )
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{
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input_thread_t * p_input = (input_thread_t *)p_this;
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input_socket_t * p_access_data = (input_socket_t *)p_input->p_access_data;
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msg_Info( p_input, "closing `%s/%s://%s'",
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p_input->psz_access, p_input->psz_demux, p_input->psz_name );
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#ifdef UNDER_CE
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CloseHandle( (HANDLE)p_access_data->i_handle );
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#else
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close( p_access_data->i_handle );
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#endif
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free( p_access_data );
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}
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/*****************************************************************************
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* Read: standard read on a file descriptor.
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*****************************************************************************/
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static ssize_t Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
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{
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_input_socket_t * p_access_data = (_input_socket_t *)p_input->p_access_data;
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ssize_t i_ret;
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#ifdef UNDER_CE
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if( !ReadFile( (HANDLE)p_access_data->_socket.i_handle, p_buffer, i_len,
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(LPDWORD)&i_ret, NULL ) )
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{
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i_ret = -1;
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}
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#else
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i_ret = read( p_access_data->_socket.i_handle, p_buffer, i_len );
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#endif
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if( i_ret < 0 )
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{
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#ifdef HAVE_ERRNO_H
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if ( errno != EINTR && errno != EAGAIN )
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msg_Err( p_input, "read failed (%s)", strerror(errno) );
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#else
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msg_Err( p_input, "read failed" );
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#endif
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/* Delay a bit to avoid consuming all the CPU. This is particularly
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* useful when reading from an unconnected FIFO. */
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msleep( INPUT_ERROR_SLEEP );
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}
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p_access_data->i_nb_reads++;
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#ifdef HAVE_SYS_STAT_H
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if ( p_input->stream.p_selected_area->i_size != 0
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&& (p_access_data->i_nb_reads % INPUT_FSTAT_NB_READS) == 0 )
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{
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struct stat stat_info;
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if ( fstat( p_access_data->_socket.i_handle, &stat_info ) == -1 )
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{
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# ifdef HAVE_ERRNO_H
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msg_Warn( p_input, "couldn't stat again the file (%s)",
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strerror(errno) );
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# else
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msg_Warn( p_input, "couldn't stat again the file" );
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# endif
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}
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else if ( p_input->stream.p_selected_area->i_size != stat_info.st_size )
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{
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p_input->stream.p_selected_area->i_size = stat_info.st_size;
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p_input->stream.b_changed = 1;
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}
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}
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#endif
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return i_ret;
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}
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/*****************************************************************************
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* Seek: seek to a specific location in a file
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*****************************************************************************/
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static void Seek( input_thread_t * p_input, off_t i_pos )
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{
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#define S p_input->stream
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input_socket_t * p_access_data = (input_socket_t *)p_input->p_access_data;
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lseek( p_access_data->i_handle, i_pos, SEEK_SET );
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vlc_mutex_lock( &S.stream_lock );
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S.p_selected_area->i_tell = i_pos;
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if( S.p_selected_area->i_tell > S.p_selected_area->i_size )
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{
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msg_Err( p_input, "seeking too far" );
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S.p_selected_area->i_tell = S.p_selected_area->i_size;
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}
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else if( S.p_selected_area->i_tell < 0 )
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{
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msg_Err( p_input, "seeking too early" );
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S.p_selected_area->i_tell = 0;
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}
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vlc_mutex_unlock( &S.stream_lock );
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#undef S
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}
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