gnomevfs.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:13k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * gnomevfs.c: GnomeVFS input
- *****************************************************************************
- * Copyright (C) 2005 the VideoLAN team
- * $Id: b0ce8ecf020550be4be8e29e12f2a0c1e7d59030 $
- *
- * Authors: Benjamin Pracht <bigben -AT- videolan -DOT- 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_access.h>
- #include <libgnomevfs/gnome-vfs.h>
- #include <vlc_charset.h>
- #include "vlc_url.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 GnomeVFS streams."
- "This value should be set in milliseconds." )
- vlc_module_begin ()
- set_description( N_("GnomeVFS input") )
- set_shortname( "GnomeVFS" )
- set_category( CAT_INPUT )
- set_subcategory( SUBCAT_INPUT_ACCESS )
- add_integer( "gnomevfs-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, true )
- set_capability( "access", 10 )
- add_shortcut( "gnomevfs" )
- set_callbacks( Open, Close )
- vlc_module_end ()
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- static int Seek( access_t *, int64_t );
- static int Read( access_t *, uint8_t *, size_t );
- static int Control( access_t *, int, va_list );
- struct access_sys_t
- {
- unsigned int i_nb_reads;
- char *psz_name;
- GnomeVFSHandle *p_handle;
- GnomeVFSFileInfo *p_file_info;
- bool b_local;
- bool b_seekable;
- bool b_pace_control;
- };
- /* NOTE: we do not handle memory errors in this plugin.
- * Underlying glib does not, so there is no point in doing it here either. */
- /*****************************************************************************
- * 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 = NULL;
- char *psz_name = NULL;
- char *psz = NULL;
- char *psz_uri = NULL;
- char *psz_unescaped = NULL;
- char *psz_expand_tilde = NULL;
- GnomeVFSURI *p_uri = NULL;
- GnomeVFSResult i_ret;
- GnomeVFSHandle *p_handle = NULL;
- if( !(gnome_vfs_init()) )
- {
- msg_Warn( p_access, "couldn't initilize GnomeVFS" );
- return VLC_EGENERIC;
- }
- /* FIXME
- Since GnomeVFS segfaults on exit if we initialize it without trying to
- open a file with a valid protocol, try to open at least file:// */
- gnome_vfs_open( &p_handle, "file://", 5 );
- STANDARD_READ_ACCESS_INIT;
- p_sys->p_handle = p_handle;
- p_sys->i_nb_reads = 0;
- p_sys->b_pace_control = true;
- if( strcmp( "gnomevfs", p_access->psz_access ) &&
- *(p_access->psz_access) != ' ')
- {
- asprintf( &psz_name, "%s://%s", p_access->psz_access,
- p_access->psz_path );
- }
- else
- {
- psz_name = strdup( p_access->psz_path );
- }
- psz = ToLocale( psz_name );
- psz_expand_tilde = gnome_vfs_expand_initial_tilde( psz );
- LocaleFree( psz );
- psz_unescaped = gnome_vfs_make_uri_from_shell_arg( psz_expand_tilde );
- /* gnome_vfs_make_uri_from_shell_arg will only escape the uri
- for relative paths. So we need to use
- gnome_vfs_escape_host_and_path_string in other cases. */
- if( !strcmp( psz_unescaped, psz_expand_tilde ) )
- {
- /* Now we are sure that we have a complete valid unescaped URI beginning
- with the protocol. We want to escape it. However, gnomevfs's escaping
- function are broken and will try to escape characters un the username/
- password field. So parse the URI with vlc_UrlParse ans only escape the
- path */
- vlc_url_t url;
- char *psz_escaped_path;
- char *psz_path_begin;
- vlc_UrlParse( &url, psz_unescaped, 0 );
- psz_escaped_path = gnome_vfs_escape_path_string( url.psz_path );
- if( psz_escaped_path )
- {
- /* Now let's reconstruct a valid URI from all that stuff */
- psz_path_begin = psz_unescaped + strlen( psz_unescaped )
- - strlen( url.psz_path );
- *psz_path_begin = ' ';
- asprintf( &psz_uri, "%s%s", psz_unescaped, psz_escaped_path );
- g_free( psz_escaped_path );
- g_free( psz_unescaped );
- }
- else
- {
- psz_uri = psz_unescaped;
- }
- }
- else
- {
- psz_uri = psz_unescaped;
- }
- g_free( psz_expand_tilde );
- p_uri = gnome_vfs_uri_new( psz_uri );
- if( p_uri )
- {
- p_sys->p_file_info = gnome_vfs_file_info_new();
- i_ret = gnome_vfs_get_file_info_uri( p_uri,
- p_sys->p_file_info, 8 );
- if( i_ret )
- {
- msg_Warn( p_access, "cannot get file info for uri %s (%s)",
- psz_uri, gnome_vfs_result_to_string( i_ret ) );
- gnome_vfs_file_info_unref( p_sys->p_file_info );
- gnome_vfs_uri_unref( p_uri);
- free( p_sys );
- free( psz_uri );
- free( psz_name );
- return VLC_EGENERIC;
- }
- }
- else
- {
- msg_Warn( p_access, "cannot parse MRL %s or unsupported protocol", psz_name );
- free( psz_uri );
- free( p_sys );
- free( psz_name );
- return VLC_EGENERIC;
- }
- msg_Dbg( p_access, "opening file `%s'", psz_uri );
- i_ret = gnome_vfs_open( &(p_sys->p_handle), psz_uri, 5 );
- if( i_ret )
- {
- msg_Warn( p_access, "cannot open file %s: %s", psz_uri,
- gnome_vfs_result_to_string( i_ret ) );
- gnome_vfs_uri_unref( p_uri);
- free( psz_uri );
- free( p_sys );
- free( psz_name );
- return VLC_EGENERIC;
- }
- if (GNOME_VFS_FILE_INFO_LOCAL( p_sys->p_file_info ))
- {
- p_sys->b_local = true;
- }
- if( p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_REGULAR ||
- p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_CHARACTER_DEVICE ||
- p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_BLOCK_DEVICE )
- {
- p_sys->b_seekable = true;
- p_access->info.i_size = (int64_t)(p_sys->p_file_info->size);
- }
- else if( p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_FIFO
- || p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_SOCKET )
- {
- p_sys->b_seekable = false;
- }
- else
- {
- msg_Err( p_access, "unknown file type for `%s'", psz_name );
- return VLC_EGENERIC;
- }
- if( p_sys->b_seekable && !p_access->info.i_size )
- {
- /* FIXME that's bad because all others access will be probed */
- msg_Warn( p_access, "file %s is empty, aborting", psz_name );
- gnome_vfs_file_info_unref( p_sys->p_file_info );
- gnome_vfs_uri_unref( p_uri);
- free( p_sys );
- free( psz_uri );
- free( psz_name );
- return VLC_EGENERIC;
- }
- /* Update default_pts to a suitable value for file access */
- var_Create( p_access, "gnomevfs-caching",
- VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
- free( psz_uri );
- p_sys->psz_name = psz_name;
- gnome_vfs_uri_unref( p_uri);
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * 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;
- int i_result;
- i_result = gnome_vfs_close( p_sys->p_handle );
- if( i_result )
- {
- msg_Err( p_access, "cannot close %s: %s", p_sys->psz_name,
- gnome_vfs_result_to_string( i_result ) );
- }
- gnome_vfs_file_info_unref( p_sys->p_file_info );
- free( p_sys->psz_name );
- free( p_sys );
- }
- /*****************************************************************************
- * Read: standard read on a file descriptor.
- *****************************************************************************/
- static int Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
- {
- access_sys_t *p_sys = p_access->p_sys;
- GnomeVFSFileSize i_read_len;
- int i_ret;
- i_ret = gnome_vfs_read( p_sys->p_handle, p_buffer,
- (GnomeVFSFileSize)i_len, &i_read_len );
- if( i_ret )
- {
- p_access->info.b_eof = true;
- if( i_ret != GNOME_VFS_ERROR_EOF )
- {
- msg_Err( p_access, "read failed (%s)",
- gnome_vfs_result_to_string( i_ret ) );
- }
- }
- else
- {
- p_sys->i_nb_reads++;
- if( p_access->info.i_size != 0 &&
- (p_sys->i_nb_reads % INPUT_FSTAT_NB_READS) == 0 &&
- p_sys->b_local )
- {
- gnome_vfs_file_info_clear( p_sys->p_file_info );
- i_ret = gnome_vfs_get_file_info_from_handle( p_sys->p_handle,
- p_sys->p_file_info, 8 );
- if( i_ret )
- {
- msg_Warn( p_access, "couldn't get file properties again (%s)",
- gnome_vfs_result_to_string( i_ret ) );
- }
- else
- {
- p_access->info.i_size = (int64_t)(p_sys->p_file_info->size);
- }
- }
- }
- p_access->info.i_pos += (int64_t)i_read_len;
- /* Some Acces (http) never return EOF and loop on the file */
- if( p_access->info.i_pos > p_access->info.i_size )
- {
- p_access->info.b_eof = true;
- return 0;
- }
- return (int)i_read_len;
- }
- /*****************************************************************************
- * Seek: seek to a specific location in a file
- *****************************************************************************/
- static int Seek( access_t *p_access, int64_t i_pos )
- {
- access_sys_t *p_sys = p_access->p_sys;
- int i_ret;
- i_ret = gnome_vfs_seek( p_sys->p_handle, GNOME_VFS_SEEK_START,
- (GnomeVFSFileOffset)i_pos);
- if ( !i_ret )
- {
- p_access->info.i_pos = i_pos;
- }
- else
- {
- GnomeVFSFileSize i_offset;
- msg_Err( p_access, "cannot seek (%s)",
- gnome_vfs_result_to_string( i_ret ) );
- i_ret = gnome_vfs_tell( p_sys->p_handle, &i_offset );
- if( !i_ret )
- {
- msg_Err( p_access, "cannot tell the current position (%s)",
- gnome_vfs_result_to_string( i_ret ) );
- return VLC_EGENERIC;
- }
- }
- /* Reset eof */
- p_access->info.b_eof = false;
- /* FIXME */
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * 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_sys->b_seekable;
- 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,
- "gnomevfs-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_CONTENT_TYPE:
- return VLC_EGENERIC;
- default:
- msg_Warn( p_access, "unimplemented query in control" );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }