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:12k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * file.c: file input (file: access plug-in)
- *****************************************************************************
- * Copyright (C) 2001-2006 the VideoLAN team
- * Copyright © 2006-2007 Rémi Denis-Courmont
- * $Id: ad111cb458c35af33a8accb6c172dc4ae7ffad13 $
- *
- * Authors: Christophe Massiot <massiot@via.ecp.fr>
- * Rémi Denis-Courmont <rem # 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_input.h>
- #include <vlc_access.h>
- #include <vlc_dialog.h>
- #include <assert.h>
- #include <errno.h>
- #ifdef HAVE_SYS_TYPES_H
- # include <sys/types.h>
- #endif
- #ifdef HAVE_SYS_STAT_H
- # include <sys/stat.h>
- #endif
- #ifdef HAVE_FCNTL_H
- # include <fcntl.h>
- #endif
- #if defined (__linux__)
- # include <sys/vfs.h>
- # include <linux/magic.h>
- #elif defined (HAVE_SYS_MOUNT_H)
- # include <sys/param.h>
- # include <sys/mount.h>
- #endif
- #if defined( WIN32 )
- # include <io.h>
- # include <ctype.h>
- # include <shlwapi.h>
- #else
- # include <unistd.h>
- # include <poll.h>
- #endif
- #if defined( WIN32 ) && !defined( UNDER_CE )
- # ifdef lseek
- # undef lseek
- # endif
- # define lseek _lseeki64
- #elif defined( UNDER_CE )
- /* FIXME the commandline on wince is a mess */
- # define dup(a) -1
- # define PathIsNetworkPathW(wpath) (! wcsncmp(wpath, L"\\", 2))
- #endif
- #include <vlc_charset.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Open ( vlc_object_t * );
- static void Close( vlc_object_t * );
- #define CACHING_TEXT N_("Caching value in ms")
- #define CACHING_LONGTEXT N_(
- "Caching value for files. This "
- "value should be set in milliseconds." )
- vlc_module_begin ()
- set_description( N_("File input") )
- set_shortname( N_("File") )
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_ACCESS )
- add_integer( "file-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, true )
- change_safe()
- add_obsolete_string( "file-cat" )
- set_capability( "access", 50 )
- add_shortcut( "file" )
- add_shortcut( "fd" )
- add_shortcut( "stream" )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static int Seek( access_t *, int64_t );
- static int NoSeek( access_t *, int64_t );
- static ssize_t Read( access_t *, uint8_t *, size_t );
- static int Control( access_t *, int, va_list );
- static int open_file( access_t *, const char * );
- struct access_sys_t
- {
- unsigned int i_nb_reads;
- int fd;
- /* */
- bool b_pace_control;
- };
- static bool IsRemote (int fd)
- {
- #ifdef HAVE_FSTATFS
- struct statfs stf;
- if (fstatfs (fd, &stf))
- return false;
- #if defined(MNT_LOCAL)
- return !(stf.f_flags & MNT_LOCAL);
- #elif defined (__linux__)
- switch (stf.f_type)
- {
- case AFS_SUPER_MAGIC:
- case CODA_SUPER_MAGIC:
- case NCP_SUPER_MAGIC:
- case NFS_SUPER_MAGIC:
- case SMB_SUPER_MAGIC:
- case 0xFF534D42 /*CIFS_MAGIC_NUMBER*/:
- return true;
- }
- return false;
- #endif
- #else /* !HAVE_FSTATFS */
- return false;
- #endif
- }
- /*****************************************************************************
- * Open: open the file
- *****************************************************************************/
- static int Open( vlc_object_t *p_this )
- {
- access_t *p_access = (access_t*)p_this;
- access_sys_t *p_sys;
- #ifdef WIN32
- wchar_t wpath[MAX_PATH+1];
- bool is_remote = false;
- #endif
- /* Update default_pts to a suitable value for file access */
- var_Create( p_access, "file-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- STANDARD_READ_ACCESS_INIT;
- p_sys->i_nb_reads = 0;
- p_sys->b_pace_control = true;
- /* Open file */
- int fd = -1;
- if (!strcasecmp (p_access->psz_access, "fd"))
- fd = dup (atoi (p_access->psz_path));
- else if (!strcmp (p_access->psz_path, "-"))
- fd = dup (0);
- else
- {
- msg_Dbg (p_access, "opening file `%s'", p_access->psz_path);
- fd = open_file (p_access, p_access->psz_path);
- #ifdef WIN32
- if (MultiByteToWideChar (CP_UTF8, 0, p_access->psz_path, -1,
- wpath, MAX_PATH)
- && PathIsNetworkPathW (wpath))
- is_remote = true;
- # define IsRemote( fd ) ((void)fd, is_remote)
- #endif
- }
- if (fd == -1)
- goto error;
- #ifdef HAVE_SYS_STAT_H
- struct stat st;
- if (fstat (fd, &st))
- {
- msg_Err (p_access, "failed to read (%m)");
- goto error;
- }
- /* Directories can be opened and read from, but only readdir() knows
- * how to parse the data. The directory plugin will do it. */
- if (S_ISDIR (st.st_mode))
- {
- msg_Dbg (p_access, "ignoring directory");
- goto error;
- }
- if (S_ISREG (st.st_mode))
- p_access->info.i_size = st.st_size;
- else if (!S_ISBLK (st.st_mode))
- {
- p_access->pf_seek = NoSeek;
- p_sys->b_pace_control = strcasecmp (p_access->psz_access, "stream");
- }
- #else
- # warning File size not known!
- #endif
- if (IsRemote(fd))
- {
- int i_cache = var_GetInteger (p_access, "file-caching") + 700;
- var_SetInteger (p_access, "file-caching", i_cache);
- msg_Warn (p_access, "Opening remote file, increasing cache: %d",
- i_cache);
- }
- p_sys->fd = fd;
- return VLC_SUCCESS;
- error:
- if (fd != -1)
- close (fd);
- free (p_sys);
- 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;
- close (p_sys->fd);
- free (p_sys);
- }
- #include <vlc_network.h>
- /*****************************************************************************
- * Read: standard read on a file descriptor.
- *****************************************************************************/
- static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int fd = p_sys->fd;
- ssize_t i_ret;
- #ifndef WIN32
- if (p_access->pf_seek == NoSeek)
- i_ret = net_Read (p_access, fd, NULL, p_buffer, i_len, false);
- else
- #endif
- i_ret = read (fd, p_buffer, i_len);
- if( i_ret < 0 )
- {
- switch (errno)
- {
- case EINTR:
- case EAGAIN:
- break;
- default:
- msg_Err (p_access, "failed to read (%m)");
- dialog_Fatal (p_access, _("File reading failed"), "%s",
- _("VLC could not read the file."));
- p_access->info.b_eof = true;
- return 0;
- }
- }
- else if( i_ret > 0 )
- p_access->info.i_pos += i_ret;
- else
- p_access->info.b_eof = true;
- p_sys->i_nb_reads++;
- #ifdef HAVE_SYS_STAT_H
- if ((p_access->info.i_size && !(p_sys->i_nb_reads % INPUT_FSTAT_NB_READS))
- || (p_access->info.i_pos > p_access->info.i_size))
- {
- struct stat st;
- if ((fstat (fd, &st) == 0)
- && (p_access->info.i_size != st.st_size))
- {
- p_access->info.i_size = st.st_size;
- p_access->info.i_update |= INPUT_UPDATE_SIZE;
- }
- }
- #endif
- return i_ret;
- }
- /*****************************************************************************
- * Seek: seek to a specific location in a file
- *****************************************************************************/
- static int Seek (access_t *p_access, int64_t i_pos)
- {
- p_access->info.i_pos = i_pos;
- p_access->info.b_eof = false;
- lseek (p_access->p_sys->fd, i_pos, SEEK_SET);
- return VLC_SUCCESS;
- }
- static int NoSeek (access_t *p_access, int64_t i_pos)
- {
- /* assert(0); ?? */
- (void) p_access; (void) i_pos;
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * Control:
- *****************************************************************************/
- static int Control( access_t *p_access, int i_query, va_list args )
- {
- access_sys_t *p_sys = p_access->p_sys;
- 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 = (p_access->pf_seek != NoSeek);
- break;
- case ACCESS_CAN_PAUSE:
- case ACCESS_CAN_CONTROL_PACE:
- pb_bool = (bool*)va_arg( args, bool* );
- *pb_bool = 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, "file-caching" ) * INT64_C(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_PRIVATE_ID_STATE:
- case ACCESS_GET_CONTENT_TYPE:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_access, "unimplemented query %d in control", i_query );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * open_file: Opens a specific file
- *****************************************************************************/
- static int open_file (access_t *p_access, const char *path)
- {
- #if defined(WIN32)
- if (!strcasecmp (p_access->psz_access, "file")
- && ('/' == path[0]) && isalpha (path[1])
- && (':' == path[2]) && ('/' == path[3]))
- /* Explorer can open path such as file:/C:/ or file:///C:/
- * hence remove leading / if found */
- path++;
- #endif
- int fd = utf8_open (path, O_RDONLY | O_NONBLOCK /* O_LARGEFILE*/, 0666);
- if (fd == -1)
- {
- msg_Err (p_access, "cannot open file %s (%m)", path);
- dialog_Fatal (p_access, _("File reading failed"),
- _("VLC could not open the file "%s"."), path);
- return -1;
- }
- #if defined(HAVE_FCNTL)
- /* We'd rather use any available memory for reading ahead
- * than for caching what we've already seen/heard */
- # if defined(F_RDAHEAD)
- fcntl (fd, F_RDAHEAD, 1);
- # endif
- # if defined(F_NOCACHE)
- fcntl (fd, F_NOCACHE, 1);
- # endif
- #endif
- return fd;
- }