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vlc/modules/access/gnomevfs.c

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/*****************************************************************************
* gnomevfs.c: GnomeVFS input
*****************************************************************************
* Copyright (C) 2005 the VideoLAN team
* $Id$
*
* 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 *, int );
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) != '\0')
{
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 = '\0';
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, int 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;
int *pi_int;
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_MTU:
pi_int = (int*)va_arg( args, int * );
*pi_int = 0;
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;
}
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