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406 lines
11 KiB
406 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) 2001-2006 the VideoLAN team
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* Copyright © 2006-2007 Rémi Denis-Courmont
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* $Id$
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Rémi Denis-Courmont <rem # videolan # org>
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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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include "fs.h"
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#include <vlc_input.h>
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#include <vlc_access.h>
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#include <vlc_dialog.h>
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#include <assert.h>
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#include <errno.h>
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#include <sys/types.h>
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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_FCNTL_H
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# include <fcntl.h>
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#endif
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#ifdef HAVE_FSTATVFS
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# include <sys/statvfs.h>
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# if defined (HAVE_SYS_MOUNT_H)
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# include <sys/param.h>
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# include <sys/mount.h>
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# endif
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#endif
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#ifdef HAVE_LINUX_MAGIC_H
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# include <sys/vfs.h>
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# include <linux/magic.h>
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#endif
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#if defined( WIN32 )
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# include <io.h>
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# include <ctype.h>
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# include <shlwapi.h>
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# include <vlc_charset.h>
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#elif defined( __OS2__ )
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# include <ctype.h>
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#else
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# include <unistd.h>
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#endif
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#include <dirent.h>
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#if defined( WIN32 ) && !defined( UNDER_CE )
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# ifdef lseek
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# undef lseek
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# endif
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# define lseek _lseeki64
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#elif defined( UNDER_CE )
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/* FIXME the commandline on wince is a mess */
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# define PathIsNetworkPathW(wpath) (! wcsncmp(wpath, L"\\\\", 2))
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#endif
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#include <vlc_fs.h>
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#include <vlc_url.h>
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struct access_sys_t
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{
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unsigned int i_nb_reads;
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int fd;
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/* */
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unsigned caching;
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bool b_pace_control;
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};
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#if !defined (WIN32) && !defined (__OS2__)
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static bool IsRemote (int fd)
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{
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#if defined (HAVE_FSTATVFS) && defined (MNT_LOCAL)
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struct statvfs stf;
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if (fstatvfs (fd, &stf))
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return false;
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/* fstatvfs() is in POSIX, but MNT_LOCAL is not */
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return !(stf.f_flag & MNT_LOCAL);
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#elif defined (HAVE_LINUX_MAGIC_H)
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struct statfs stf;
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if (fstatfs (fd, &stf))
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return false;
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switch ((unsigned long)stf.f_type)
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{
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case AFS_SUPER_MAGIC:
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case CODA_SUPER_MAGIC:
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case NCP_SUPER_MAGIC:
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case NFS_SUPER_MAGIC:
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case SMB_SUPER_MAGIC:
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case 0xFF534D42 /*CIFS_MAGIC_NUMBER*/:
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return true;
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}
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return false;
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#else
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(void)fd;
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return false;
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#endif
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}
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#endif
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#ifndef HAVE_POSIX_FADVISE
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# define posix_fadvise(fd, off, len, adv)
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#endif
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/*****************************************************************************
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* Open: open the file
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*****************************************************************************/
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int Open( vlc_object_t *p_this )
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{
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access_t *p_access = (access_t*)p_this;
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#ifdef WIN32
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bool is_remote = false;
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#endif
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/* Open file */
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int fd = -1;
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if (!strcasecmp (p_access->psz_access, "fd"))
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{
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char *end;
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int oldfd = strtol (p_access->psz_location, &end, 10);
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if (*end == '\0')
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fd = vlc_dup (oldfd);
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else if (*end == '/' && end > p_access->psz_location)
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{
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char *name = decode_URI_duplicate (end - 1);
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if (name != NULL)
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{
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name[0] = '.';
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fd = vlc_openat (oldfd, name, O_RDONLY | O_NONBLOCK);
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free (name);
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}
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}
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}
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else
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{
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const char *path = p_access->psz_filepath;
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msg_Dbg (p_access, "opening file `%s'", path);
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fd = vlc_open (path, O_RDONLY | O_NONBLOCK);
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if (fd == -1)
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{
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msg_Err (p_access, "cannot open file %s (%m)", path);
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dialog_Fatal (p_access, _("File reading failed"),
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_("VLC could not open the file \"%s\"."), path);
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}
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#ifdef WIN32
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wchar_t *wpath = ToWide (path);
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if (wpath != NULL && PathIsNetworkPathW (wpath))
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is_remote = true;
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free (wpath);
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# define IsRemote( fd ) ((void)fd, is_remote)
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#endif
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}
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if (fd == -1)
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return VLC_EGENERIC;
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struct stat st;
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if (fstat (fd, &st))
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{
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msg_Err (p_access, "failed to read (%m)");
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goto error;
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}
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/* Directories can be opened and read from, but only readdir() knows
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* how to parse the data. The directory plugin will do it. */
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if (S_ISDIR (st.st_mode))
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{
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#ifdef HAVE_FDOPENDIR
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DIR *handle = fdopendir (fd);
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if (handle == NULL)
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goto error; /* Uh? */
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return DirInit (p_access, handle);
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#else
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msg_Dbg (p_access, "ignoring directory");
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goto error;
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#endif
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}
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access_sys_t *p_sys = malloc (sizeof (*p_sys));
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if (unlikely(p_sys == NULL))
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goto error;
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access_InitFields (p_access);
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p_access->pf_read = FileRead;
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p_access->pf_block = NULL;
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p_access->pf_control = FileControl;
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p_access->pf_seek = FileSeek;
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p_access->p_sys = p_sys;
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p_sys->i_nb_reads = 0;
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p_sys->fd = fd;
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p_sys->caching = var_InheritInteger (p_access, "file-caching");
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if (IsRemote(fd))
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p_sys->caching += var_InheritInteger (p_access, "network-caching");
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p_sys->b_pace_control = true;
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if (S_ISREG (st.st_mode))
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p_access->info.i_size = st.st_size;
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else if (!S_ISBLK (st.st_mode))
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{
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p_access->pf_seek = NoSeek;
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p_sys->b_pace_control = strcasecmp (p_access->psz_access, "stream");
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}
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if (p_access->pf_seek != NoSeek)
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{
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/* Demuxers will need the beginning of the file for probing. */
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posix_fadvise (fd, 0, 4096, POSIX_FADV_WILLNEED);
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/* In most cases, we only read the file once. */
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posix_fadvise (fd, 0, 0, POSIX_FADV_NOREUSE);
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#if defined(HAVE_FCNTL)
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/* We'd rather use any available memory for reading ahead
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* than for caching what we've already seen/heard */
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# if defined(F_RDAHEAD)
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fcntl (fd, F_RDAHEAD, 1);
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# endif
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# if defined(F_NOCACHE)
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fcntl (fd, F_NOCACHE, 1);
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# endif
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#endif
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}
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return VLC_SUCCESS;
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error:
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close (fd);
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* Close: close the target
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*****************************************************************************/
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void Close (vlc_object_t * p_this)
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{
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access_t *p_access = (access_t*)p_this;
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if (p_access->pf_read == NULL)
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{
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DirClose (p_this);
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return;
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}
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access_sys_t *p_sys = p_access->p_sys;
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close (p_sys->fd);
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free (p_sys);
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}
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#include <vlc_network.h>
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/*****************************************************************************
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* Read: standard read on a file descriptor.
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*****************************************************************************/
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ssize_t FileRead( access_t *p_access, uint8_t *p_buffer, size_t i_len )
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{
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access_sys_t *p_sys = p_access->p_sys;
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int fd = p_sys->fd;
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ssize_t i_ret;
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#if !defined (WIN32) && !defined (__OS2__)
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if (p_access->pf_seek == NoSeek)
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i_ret = net_Read (p_access, fd, NULL, p_buffer, i_len, false);
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else
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#endif
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i_ret = read (fd, p_buffer, i_len);
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if( i_ret < 0 )
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{
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switch (errno)
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{
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case EINTR:
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case EAGAIN:
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break;
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default:
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msg_Err (p_access, "failed to read (%m)");
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dialog_Fatal (p_access, _("File reading failed"), "%s",
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_("VLC could not read the file."));
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p_access->info.b_eof = true;
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return 0;
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}
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}
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else if( i_ret > 0 )
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p_access->info.i_pos += i_ret;
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else
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p_access->info.b_eof = true;
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p_sys->i_nb_reads++;
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if ((p_access->info.i_size && !(p_sys->i_nb_reads % INPUT_FSTAT_NB_READS))
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|| (p_access->info.i_pos > p_access->info.i_size))
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{
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#ifdef HAVE_SYS_STAT_H
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struct stat st;
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if ((fstat (fd, &st) == 0)
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&& (p_access->info.i_size != (uint64_t)st.st_size))
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{
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p_access->info.i_size = st.st_size;
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p_access->info.i_update |= INPUT_UPDATE_SIZE;
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}
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#endif
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}
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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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int FileSeek (access_t *p_access, uint64_t i_pos)
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{
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p_access->info.i_pos = i_pos;
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p_access->info.b_eof = false;
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lseek (p_access->p_sys->fd, i_pos, SEEK_SET);
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return VLC_SUCCESS;
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}
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int NoSeek (access_t *p_access, uint64_t i_pos)
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{
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/* assert(0); ?? */
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(void) p_access; (void) i_pos;
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return VLC_EGENERIC;
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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int FileControl( access_t *p_access, int i_query, va_list args )
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{
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access_sys_t *p_sys = p_access->p_sys;
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bool *pb_bool;
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int64_t *pi_64;
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switch( i_query )
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{
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/* */
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case ACCESS_CAN_SEEK:
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case ACCESS_CAN_FASTSEEK:
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pb_bool = (bool*)va_arg( args, bool* );
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*pb_bool = (p_access->pf_seek != NoSeek);
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break;
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case ACCESS_CAN_PAUSE:
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case ACCESS_CAN_CONTROL_PACE:
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pb_bool = (bool*)va_arg( args, bool* );
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*pb_bool = p_sys->b_pace_control;
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break;
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/* */
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case ACCESS_GET_PTS_DELAY:
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pi_64 = (int64_t*)va_arg( args, int64_t * );
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*pi_64 = p_sys->caching * INT64_C(1000);
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break;
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/* */
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case ACCESS_SET_PAUSE_STATE:
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/* Nothing to do */
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break;
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case ACCESS_GET_TITLE_INFO:
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case ACCESS_SET_TITLE:
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case ACCESS_SET_SEEKPOINT:
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case ACCESS_SET_PRIVATE_ID_STATE:
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case ACCESS_GET_META:
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case ACCESS_GET_PRIVATE_ID_STATE:
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case ACCESS_GET_CONTENT_TYPE:
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return VLC_EGENERIC;
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default:
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msg_Warn( p_access, "unimplemented query %d in control", i_query );
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return VLC_EGENERIC;
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}
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return VLC_SUCCESS;
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}
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