1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright © 2006 Rémi Denis-Courmont
7 * Author: Rémi Denis-Courmont <rem # videolan,org>
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.
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.
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 *****************************************************************************/
32 #include <vlc_access.h>
34 #include <vlc_charset.h>
37 #define DEFAULT_MARGIN 32 // megabytes
39 #define FORCE_TEXT N_("Force use of dump module")
40 #define FORCE_LONGTEXT N_("Activate the dump module " \
41 "even for media with fast seeking.")
43 #define MARGIN_TEXT N_("Maximum size of temporary file (Mb)")
44 #define MARGIN_LONGTEXT N_("The dump module will abort dumping of the media " \
45 "if more than this much megabyte were performed.")
47 static int Open (vlc_object_t *);
48 static void Close (vlc_object_t *);
51 set_shortname (_("Dump"));
52 set_description (_("Dump"));
53 set_category (CAT_INPUT);
54 set_subcategory (SUBCAT_INPUT_ACCESS_FILTER);
55 set_capability ("access_filter", 0);
56 add_shortcut ("dump");
57 set_callbacks (Open, Close);
59 add_bool ("dump-force", VLC_FALSE, NULL, FORCE_TEXT,
60 FORCE_LONGTEXT, VLC_FALSE);
61 add_integer ("dump-margin", DEFAULT_MARGIN, NULL, MARGIN_TEXT,
62 MARGIN_LONGTEXT, VLC_FALSE);
65 static int Read (access_t *access, uint8_t *buffer, int len);
66 static block_t *Block (access_t *access);
67 static int Seek (access_t *access, int64_t offset);
68 static int Control (access_t *access, int cmd, va_list ap);
70 static void Trigger (access_t *access);
71 static int KeyHandler (vlc_object_t *obj, char const *varname,
72 vlc_value_t oldval, vlc_value_t newval, void *data);
84 static int Open (vlc_object_t *obj)
86 access_t *access = (access_t*)obj;
87 access_t *src = access->p_source;
89 if (!var_CreateGetBool (access, "dump-force"))
92 if ((access2_Control (src, ACCESS_CAN_FASTSEEK, &b) == 0) && b)
94 msg_Dbg (obj, "dump filter useless");
99 if (src->pf_read != NULL)
100 access->pf_read = Read;
102 access->pf_block = Block;
103 if (src->pf_seek != NULL)
104 access->pf_seek = Seek;
106 access->pf_control = Control;
107 access->info = src->info;
109 access_sys_t *p_sys = access->p_sys = malloc (sizeof (*p_sys));
112 memset (p_sys, 0, sizeof (*p_sys));
114 if ((p_sys->stream = tmpfile ()) == NULL)
116 msg_Err (access, "cannot create temporary file: %s", strerror (errno));
120 p_sys->tmp_max = ((int64_t)var_CreateGetInteger (access, "dump-margin")) << 20;
122 var_AddCallback (access->p_libvlc, "key-pressed", KeyHandler, access);
131 static void Close (vlc_object_t *obj)
133 access_t *access = (access_t *)obj;
134 access_sys_t *p_sys = access->p_sys;
136 var_DelCallback (access->p_libvlc, "key-pressed", KeyHandler, access);
138 if (p_sys->stream != NULL)
139 fclose (p_sys->stream);
144 static void Dump (access_t *access, const uint8_t *buffer, size_t len)
146 access_sys_t *p_sys = access->p_sys;
147 FILE *stream = p_sys->stream;
149 if ((stream == NULL) /* not dumping */
150 || (access->info.i_pos < p_sys->dumpsize) /* already known data */)
153 size_t needed = access->info.i_pos - p_sys->dumpsize;
155 return; /* gap between data and dump offset (seek too far ahead?) */
157 buffer += len - needed;
161 return; /* no useful data */
163 if ((p_sys->tmp_max != -1) && (access->info.i_pos > p_sys->tmp_max))
165 msg_Dbg (access, "too much data - dump will not work");
170 if (fwrite (buffer, len, 1, stream) != 1)
172 msg_Err (access, "cannot write to file: %s", strerror (errno));
176 p_sys->dumpsize += len;
181 p_sys->stream = NULL;
185 static int Read (access_t *access, uint8_t *buffer, int len)
187 access_t *src = access->p_source;
189 src->info.i_update = access->info.i_update;
190 len = src->pf_read (src, buffer, len);
191 access->info = src->info;
193 Dump (access, buffer, len);
199 static block_t *Block (access_t *access)
201 access_t *src = access->p_source;
204 src->info.i_update = access->info.i_update;
205 block = src->pf_block (src);
206 access->info = src->info;
208 if ((block == NULL) || (block->i_buffer <= 0))
211 Dump (access, block->p_buffer, block->i_buffer);
217 static int Control (access_t *access, int cmd, va_list ap)
219 access_t *src = access->p_source;
221 return src->pf_control (src, cmd, ap);
225 static int Seek (access_t *access, int64_t offset)
227 access_t *src = access->p_source;
228 access_sys_t *p_sys = access->p_sys;
230 if (p_sys->tmp_max == -1)
232 msg_Err (access, "cannot seek while dumping!");
236 if (p_sys->stream != NULL)
237 msg_Dbg (access, "seeking - dump might not work");
239 src->info.i_update = access->info.i_update;
240 int ret = src->pf_seek (src, offset);
241 access->info = src->info;
246 #ifndef HAVE_LOCALTIME_R
247 static inline struct tm *localtime_r (const time_t *now, struct tm *res)
249 struct tm *unsafe = localtime (now);
251 * This is not thread-safe. Blame your C library.
252 * On Win32 there SHOULD be _localtime_s instead, but of course
253 * Cygwin and Mingw32 don't know about it. You're on your own if you
259 memcpy (res, unsafe, sizeof (*res));
265 static void Trigger (access_t *access)
267 access_sys_t *p_sys = access->p_sys;
269 if (p_sys->stream == NULL)
272 if (p_sys->tmp_max == -1)
273 return; // already triggered - should we stop? FIXME
279 if (localtime_r (&now, &t) == NULL)
280 return; // No time, eh? Well, I'd rather not run on your computer.
282 if (t.tm_year > 999999999)
283 // Humanity is about 300 times older than when this was written,
284 // and there is an off-by-one in the following sprintf().
287 const char *home = access->p_libvlc->psz_homedir;
289 /* Hmm what about the extension?? */
290 char filename[strlen (home) + sizeof ("/vlcdump-YYYYYYYYY-MM-DD-HH-MM-SS.ts")];
291 sprintf (filename, "%s/vlcdump-%04u-%02u-%02u-%02u-%02u-%02u.ts", home,
292 t.tm_year, t.tm_mon, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec);
294 msg_Info (access, "dumping media to \"%s\"...", filename);
296 FILE *newstream = utf8_fopen (filename, "wb");
297 if (newstream == NULL)
299 msg_Err (access, "cannot create dump file \"%s\": %s", filename,
304 /* This might cause excessive hard drive work :( */
305 FILE *oldstream = p_sys->stream;
311 size_t len = fread (buf, 1, sizeof (buf), oldstream);
314 if (ferror (oldstream))
316 msg_Err (access, "cannot read temporary file: %s",
321 /* Done with temporary file */
323 p_sys->stream = newstream;
328 if (fwrite (buf, len, 1, newstream) != 1)
330 msg_Err (access, "cannot write dump file: %s", strerror (errno));
335 /* Failed to copy temporary file */
336 fseek (oldstream, 0, SEEK_END);
342 static int KeyHandler (vlc_object_t *obj, char const *varname,
343 vlc_value_t oldval, vlc_value_t newval, void *data)
345 access_t *access = data;
350 for (struct hotkey *key = access->p_libvlc->p_hotkeys;
351 key->psz_action != NULL; key++)
353 if (key->i_key == newval.i_int)
355 if (key->i_action == ACTIONID_DUMP)
356 Trigger ((access_t *)data);