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[vlc] / modules / access / gnomevfs.c
1 /*****************************************************************************
2  * gnomevfs.c: GnomeVFS input
3  *****************************************************************************
4  * Copyright (C) 2005 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Benjamin Pracht <bigben -AT- videolan -DOT- org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27 #include <vlc/vlc.h>
28 #include <vlc_access.h>
29
30 #include <libgnomevfs/gnome-vfs.h>
31
32 #include <stdlib.h>
33 #include <string.h>
34 #include <stdio.h>
35
36 #include <vlc_charset.h>
37 #include "vlc_url.h"
38
39 /*****************************************************************************
40  * Module descriptor
41  *****************************************************************************/
42 static int  Open ( vlc_object_t * );
43 static void Close( vlc_object_t * );
44
45 #define CACHING_TEXT N_("Caching value in ms")
46 #define CACHING_LONGTEXT N_( \
47     "Caching value for GnomeVFS streams."\
48     "This value should be set in milliseconds." )
49
50 vlc_module_begin();
51     set_description( _("GnomeVFS input") );
52     set_shortname( "GnomeVFS" );
53     set_category( CAT_INPUT );
54     set_subcategory( SUBCAT_INPUT_ACCESS );
55     add_integer( "gnomevfs-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
56     set_capability( "access2", 10 );
57     add_shortcut( "gnomevfs" );
58     set_callbacks( Open, Close );
59 vlc_module_end();
60
61
62 /*****************************************************************************
63  * Exported prototypes
64  *****************************************************************************/
65 static int  Seek( access_t *, int64_t );
66 static int  Read( access_t *, uint8_t *, int );
67 static int  Control( access_t *, int, va_list );
68
69 struct access_sys_t
70 {
71     unsigned int i_nb_reads;
72     char *psz_name;
73
74     GnomeVFSHandle *p_handle;
75     GnomeVFSFileInfo *p_file_info;
76
77     vlc_bool_t b_local;
78     vlc_bool_t b_seekable;
79     vlc_bool_t b_pace_control;
80 };
81
82 /*****************************************************************************
83  * Open: open the file
84  *****************************************************************************/
85 static int Open( vlc_object_t *p_this )
86 {
87     access_t       *p_access = (access_t*)p_this;
88     access_sys_t   *p_sys = NULL;
89     char           *psz_name = NULL;
90     char           *psz = NULL;
91     char           *psz_uri = NULL;
92     char           *psz_unescaped = NULL;
93     char           *psz_expand_tilde = NULL;
94     GnomeVFSURI    *p_uri = NULL;
95     GnomeVFSResult  i_ret;
96     GnomeVFSHandle *p_handle = NULL;
97     if( !(gnome_vfs_init()) )
98     {
99         msg_Warn( p_access, "couldn't initilize GnomeVFS" );
100         return VLC_EGENERIC;
101     }
102
103     /* FIXME
104        Since GnomeVFS segfaults on exit if we initialize it without trying to
105        open a file with a valid protocol, try to open at least file:// */
106     gnome_vfs_open( &p_handle, "file://", 5 );
107
108     STANDARD_READ_ACCESS_INIT;
109
110     p_sys->p_handle = p_handle;
111     p_sys->i_nb_reads = 0;
112     p_sys->b_pace_control = VLC_TRUE;
113
114     if( strcmp( "gnomevfs", p_access->psz_access ) &&
115                                             *(p_access->psz_access) != '\0')
116     {
117         psz_name = malloc( strlen( p_access->psz_access ) +
118                                             strlen( p_access->psz_path ) + 4 );
119         sprintf( psz_name, "%s://%s", p_access->psz_access,
120                                                     p_access->psz_path );
121     }
122     else
123     {
124         psz_name = strdup( p_access->psz_path );
125     }
126     psz = ToLocale( psz_name );
127     psz_expand_tilde = gnome_vfs_expand_initial_tilde( psz );
128     LocaleFree( psz );
129
130     psz_unescaped = gnome_vfs_make_uri_from_shell_arg( psz_expand_tilde );
131
132    /* gnome_vfs_make_uri_from_shell_arg will only escape the uri
133       for relative paths. So we need to use
134       gnome_vfs_escape_host_and_path_string in other cases. */
135
136     if( !strcmp( psz_unescaped, psz_expand_tilde ) )
137     {
138     /* Now we are sure that we have a complete valid unescaped URI beginning
139        with the protocol. We want to escape it. However, gnomevfs's escaping
140        function are broken and will try to escape characters un the username/
141        password field. So parse the URI with vlc_UrlParse ans only escape the
142        path */
143
144         vlc_url_t url;
145         char *psz_escaped_path;
146         char *psz_path_begin;
147
148         vlc_UrlParse( &url, psz_unescaped, 0 );
149         psz_escaped_path = gnome_vfs_escape_path_string( url.psz_path );
150
151         if( psz_escaped_path )
152         {
153     /* Now let's reconstruct a valid URI from all that stuff */
154             psz_path_begin = psz_unescaped + strlen( psz_unescaped )
155                                            - strlen( url.psz_path );
156             *psz_path_begin = '\0';
157             psz_uri = malloc( strlen( psz_unescaped ) +
158                                         strlen( psz_escaped_path ) + 1 );
159             sprintf( psz_uri, "%s%s",psz_unescaped, psz_escaped_path );
160
161             g_free( psz_escaped_path );
162             g_free( psz_unescaped );
163         }
164         else
165         {
166             psz_uri = psz_unescaped;
167         }
168     }
169     else
170     {
171         psz_uri = psz_unescaped;
172     }
173
174     g_free( psz_expand_tilde );
175     p_uri = gnome_vfs_uri_new( psz_uri );
176     if( p_uri )
177     {
178         p_sys->p_file_info = gnome_vfs_file_info_new();
179         i_ret = gnome_vfs_get_file_info_uri( p_uri,
180                                                 p_sys->p_file_info, 8 );
181
182         if( i_ret )
183         {
184             msg_Warn( p_access, "cannot get file info for uri %s (%s)",
185                                 psz_uri, gnome_vfs_result_to_string( i_ret ) );
186             gnome_vfs_file_info_unref( p_sys->p_file_info );
187             gnome_vfs_uri_unref( p_uri);
188             free( p_sys );
189             g_free( psz_uri );
190             free( psz_name );
191             return VLC_EGENERIC;
192         }
193     }
194     else
195     {
196         msg_Warn( p_access, "cannot parse MRL %s or unsupported protocol", psz_name );
197         g_free( psz_uri );
198         free( p_sys );
199         free( psz_name );
200         return VLC_EGENERIC;
201     }
202
203     msg_Dbg( p_access, "opening file `%s'", psz_uri );
204     i_ret = gnome_vfs_open( &(p_sys->p_handle), psz_uri, 5 );
205     if( i_ret )
206     {
207         msg_Warn( p_access, "cannot open file %s: %s", psz_uri,
208                                 gnome_vfs_result_to_string( i_ret ) );
209
210         gnome_vfs_uri_unref( p_uri);
211         g_free( psz_uri );
212         free( p_sys );
213         free( psz_name );
214         return VLC_EGENERIC;
215     }
216
217     if (GNOME_VFS_FILE_INFO_LOCAL( p_sys->p_file_info ))
218     {
219         p_sys->b_local = VLC_TRUE;
220     }
221
222     if( p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_REGULAR ||
223         p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_CHARACTER_DEVICE ||
224         p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_BLOCK_DEVICE )
225     {
226         p_sys->b_seekable = VLC_TRUE;
227         p_access->info.i_size = (int64_t)(p_sys->p_file_info->size);
228     }
229     else if( p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_FIFO
230               || p_sys->p_file_info->type == GNOME_VFS_FILE_TYPE_SOCKET )
231     {
232         p_sys->b_seekable = VLC_FALSE;
233     }
234     else
235     {
236         msg_Err( p_access, "unknown file type for `%s'", psz_name );
237         return VLC_EGENERIC;
238     }
239
240     if( p_sys->b_seekable && !p_access->info.i_size )
241     {
242         /* FIXME that's bad because all others access will be probed */
243         msg_Warn( p_access, "file %s is empty, aborting", psz_name );
244         gnome_vfs_file_info_unref( p_sys->p_file_info );
245         gnome_vfs_uri_unref( p_uri);
246         free( p_sys );
247         g_free( psz_uri );
248         free( psz_name );
249         return VLC_EGENERIC;
250     }
251
252     /* Update default_pts to a suitable value for file access */
253     var_Create( p_access, "gnomevfs-caching",
254                                     VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
255
256     g_free( psz_uri );
257     p_sys->psz_name = psz_name;
258     gnome_vfs_uri_unref( p_uri);
259     return VLC_SUCCESS;
260 }
261
262 /*****************************************************************************
263  * Close: close the target
264  *****************************************************************************/
265 static void Close( vlc_object_t * p_this )
266 {
267     access_t     *p_access = (access_t*)p_this;
268     access_sys_t *p_sys = p_access->p_sys;
269     int i_result;
270
271     i_result = gnome_vfs_close( p_sys->p_handle );
272     if( i_result )
273     {
274          msg_Err( p_access, "cannot close %s: %s", p_sys->psz_name,
275                                 gnome_vfs_result_to_string( i_result ) );
276     }
277
278     gnome_vfs_file_info_unref( p_sys->p_file_info );
279
280     free( p_sys->psz_name );
281     free( p_sys );
282 }
283
284 /*****************************************************************************
285  * Read: standard read on a file descriptor.
286  *****************************************************************************/
287 static int Read( access_t *p_access, uint8_t *p_buffer, int i_len )
288 {
289     access_sys_t *p_sys = p_access->p_sys;
290     GnomeVFSFileSize i_read_len;
291     int i_ret;
292
293     i_ret = gnome_vfs_read( p_sys->p_handle, p_buffer,
294                                   (GnomeVFSFileSize)i_len, &i_read_len );
295     if( i_ret )
296     {
297         p_access->info.b_eof = VLC_TRUE;
298         if( i_ret != GNOME_VFS_ERROR_EOF )
299         {
300             msg_Err( p_access, "read failed (%s)",
301                                     gnome_vfs_result_to_string( i_ret ) );
302         }
303     }
304     else
305     {
306         p_sys->i_nb_reads++;
307         if( p_access->info.i_size != 0 &&
308             (p_sys->i_nb_reads % INPUT_FSTAT_NB_READS) == 0 &&
309             p_sys->b_local )
310         {
311             gnome_vfs_file_info_clear( p_sys->p_file_info );
312             i_ret = gnome_vfs_get_file_info_from_handle( p_sys->p_handle,
313                                                 p_sys->p_file_info, 8 );
314             if( i_ret )
315             {
316                 msg_Warn( p_access, "couldn't get file properties again (%s)",
317                                         gnome_vfs_result_to_string( i_ret ) );
318             }
319             else
320             {
321                 p_access->info.i_size = (int64_t)(p_sys->p_file_info->size);
322             }
323         }
324     }
325
326     p_access->info.i_pos += (int64_t)i_read_len;
327
328     /* Some Acces (http) never return EOF and loop on the file */
329     if( p_access->info.i_pos > p_access->info.i_size )
330     {
331         p_access->info.b_eof = VLC_TRUE;
332         return 0;
333     }
334     return (int)i_read_len;
335 }
336
337 /*****************************************************************************
338  * Seek: seek to a specific location in a file
339  *****************************************************************************/
340 static int Seek( access_t *p_access, int64_t i_pos )
341 {
342     access_sys_t *p_sys = p_access->p_sys;
343     int i_ret;
344
345     i_ret = gnome_vfs_seek( p_sys->p_handle, GNOME_VFS_SEEK_START,
346                                             (GnomeVFSFileOffset)i_pos);
347     if ( !i_ret )
348     {
349         p_access->info.i_pos = i_pos;
350     }
351     else
352     {
353         GnomeVFSFileSize i_offset;
354         msg_Err( p_access, "cannot seek (%s)",
355                                         gnome_vfs_result_to_string( i_ret ) );
356         i_ret = gnome_vfs_tell( p_sys->p_handle, &i_offset );
357         if( !i_ret )
358         {
359             msg_Err( p_access, "cannot tell the current position (%s)",
360                                         gnome_vfs_result_to_string( i_ret ) );
361             return VLC_EGENERIC;
362         }
363     }
364     /* Reset eof */
365     p_access->info.b_eof = VLC_FALSE;
366
367     /* FIXME */
368     return VLC_SUCCESS;
369 }
370
371 /*****************************************************************************
372  * Control:
373  *****************************************************************************/
374 static int Control( access_t *p_access, int i_query, va_list args )
375 {
376     access_sys_t *p_sys = p_access->p_sys;
377     vlc_bool_t   *pb_bool;
378     int          *pi_int;
379     int64_t      *pi_64;
380
381     switch( i_query )
382     {
383         /* */
384         case ACCESS_CAN_SEEK:
385         case ACCESS_CAN_FASTSEEK:
386             pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
387             *pb_bool = p_sys->b_seekable;
388             break;
389
390         case ACCESS_CAN_PAUSE:
391         case ACCESS_CAN_CONTROL_PACE:
392             pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
393             *pb_bool = p_sys->b_pace_control;
394             break;
395
396         /* */
397         case ACCESS_GET_MTU:
398             pi_int = (int*)va_arg( args, int * );
399             *pi_int = 0;
400             break;
401
402         case ACCESS_GET_PTS_DELAY:
403             pi_64 = (int64_t*)va_arg( args, int64_t * );
404             *pi_64 = var_GetInteger( p_access,
405                                         "gnomevfs-caching" ) * I64C(1000);
406             break;
407
408         /* */
409         case ACCESS_SET_PAUSE_STATE:
410             /* Nothing to do */
411             break;
412
413         case ACCESS_GET_TITLE_INFO:
414         case ACCESS_SET_TITLE:
415         case ACCESS_SET_SEEKPOINT:
416         case ACCESS_SET_PRIVATE_ID_STATE:
417         case ACCESS_GET_META:
418             return VLC_EGENERIC;
419
420         default:
421             msg_Warn( p_access, "unimplemented query in control" );
422             return VLC_EGENERIC;
423
424     }
425     return VLC_SUCCESS;
426 }