Free the translators on the ast_closestream
[asterisk/asterisk.git] / file.c
1 /*
2  * Asterisk -- A telephony toolkit for Linux.
3  *
4  * Generic File Format Support.
5  * 
6  * Copyright (C) 1999, Mark Spencer
7  *
8  * Mark Spencer <markster@linux-support.net>
9  *
10  * This program is free software, distributed under the terms of
11  * the GNU General Public License
12  */
13
14 #include <sys/types.h>
15 #include <asterisk/frame.h>
16 #include <asterisk/file.h>
17 #include <asterisk/logger.h>
18 #include <asterisk/channel.h>
19 #include <asterisk/sched.h>
20 #include <asterisk/options.h>
21 #include <asterisk/translate.h>
22 #include <errno.h>
23 #include <unistd.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <pthread.h>
27 #include <stdio.h>
28 #include <fcntl.h>
29 #include <dirent.h>
30 #include <sys/stat.h>
31 #include "asterisk.h"
32 #include "astconf.h"
33
34 struct ast_format {
35         /* Name of format */
36         char name[80];
37         /* Extensions (separated by | if more than one) 
38            this format can read.  First is assumed for writing (e.g. .mp3) */
39         char exts[80];
40         /* Format of frames it uses/provides (one only) */
41         int format;
42         /* Open an input stream, and start playback */
43         struct ast_filestream * (*open)(int fd);
44         /* Open an output stream, of a given file descriptor and comment it appropriately if applicable */
45         struct ast_filestream * (*rewrite)(int fd, char *comment);
46         /* Write a frame to a channel */
47         int (*write)(struct ast_filestream *, struct ast_frame *);
48         /* seek num samples into file, whence(think normal seek) */
49         int (*seek)(struct ast_filestream *, long offset, int whence);
50         /* trunc file to current position */
51         int (*trunc)(struct ast_filestream *fs);
52         /* tell current position */
53         long (*tell)(struct ast_filestream *fs);
54         /* Read the next frame from the filestream (if available) and report when to get next one
55                 (in samples) */
56         struct ast_frame * (*read)(struct ast_filestream *, int *whennext);
57         /* Close file, and destroy filestream structure */
58         void (*close)(struct ast_filestream *);
59         /* Retrieve file comment */
60         char * (*getcomment)(struct ast_filestream *);
61         /* Link */
62         struct ast_format *next;
63 };
64
65 struct ast_filestream {
66         /* Everybody reserves a block of AST_RESERVED_POINTERS pointers for us */
67         struct ast_format *fmt;
68         int flags;
69         mode_t mode;
70         char *filename;
71         /* Video file stream */
72         struct ast_filestream *vfs;
73         /* Transparently translate from another format -- just once */
74         struct ast_trans_pvt *trans;
75         struct ast_tranlator_pvt *tr;
76         int lastwriteformat;
77         int lasttimeout;
78         struct ast_channel *owner;
79 };
80
81 static pthread_mutex_t formatlock = AST_MUTEX_INITIALIZER;
82
83 static struct ast_format *formats = NULL;
84
85 int ast_format_register(char *name, char *exts, int format,
86                                                 struct ast_filestream * (*open)(int fd),
87                                                 struct ast_filestream * (*rewrite)(int fd, char *comment),
88                                                 int (*write)(struct ast_filestream *, struct ast_frame *),
89                                                 int (*seek)(struct ast_filestream *, long sample_offset, int whence),
90                                                 int (*trunc)(struct ast_filestream *),
91                                                 long (*tell)(struct ast_filestream *),
92                                                 struct ast_frame * (*read)(struct ast_filestream *, int *whennext),
93                                                 void (*close)(struct ast_filestream *),
94                                                 char * (*getcomment)(struct ast_filestream *))
95 {
96         struct ast_format *tmp;
97         if (ast_pthread_mutex_lock(&formatlock)) {
98                 ast_log(LOG_WARNING, "Unable to lock format list\n");
99                 return -1;
100         }
101         tmp = formats;
102         while(tmp) {
103                 if (!strcasecmp(name, tmp->name)) {
104                         ast_pthread_mutex_unlock(&formatlock);
105                         ast_log(LOG_WARNING, "Tried to register '%s' format, already registered\n", name);
106                         return -1;
107                 }
108                 tmp = tmp->next;
109         }
110         tmp = malloc(sizeof(struct ast_format));
111         if (!tmp) {
112                 ast_log(LOG_WARNING, "Out of memory\n");
113                 ast_pthread_mutex_unlock(&formatlock);
114                 return -1;
115         }
116         strncpy(tmp->name, name, sizeof(tmp->name)-1);
117         strncpy(tmp->exts, exts, sizeof(tmp->exts)-1);
118         tmp->open = open;
119         tmp->rewrite = rewrite;
120         tmp->read = read;
121         tmp->write = write;
122         tmp->seek = seek;
123         tmp->trunc = trunc;
124         tmp->tell = tell;
125         tmp->close = close;
126         tmp->format = format;
127         tmp->getcomment = getcomment;
128         tmp->next = formats;
129         formats = tmp;
130         ast_pthread_mutex_unlock(&formatlock);
131         if (option_verbose > 1)
132                 ast_verbose( VERBOSE_PREFIX_2 "Registered file format %s, extension(s) %s\n", name, exts);
133         return 0;
134 }
135
136 int ast_format_unregister(char *name)
137 {
138         struct ast_format *tmp, *tmpl = NULL;
139         if (ast_pthread_mutex_lock(&formatlock)) {
140                 ast_log(LOG_WARNING, "Unable to lock format list\n");
141                 return -1;
142         }
143         tmp = formats;
144         while(tmp) {
145                 if (!strcasecmp(name, tmp->name)) {
146                         if (tmpl) 
147                                 tmpl->next = tmp->next;
148                         else
149                                 formats = tmp->next;
150                         free(tmp);
151                         ast_pthread_mutex_unlock(&formatlock);
152                         if (option_verbose > 1)
153                                 ast_verbose( VERBOSE_PREFIX_2 "Unregistered format %s\n", name);
154                         return 0;
155                 }
156                 tmp = tmp->next;
157         }
158         ast_log(LOG_WARNING, "Tried to unregister format %s, already unregistered\n", name);
159         return -1;
160 }
161
162 int ast_stopstream(struct ast_channel *tmp)
163 {
164         /* Stop a running stream if there is one */
165         if (tmp->vstream)
166                 ast_closestream(tmp->vstream);
167         if (tmp->stream) {
168                 ast_closestream(tmp->stream);
169                 if (tmp->oldwriteformat && ast_set_write_format(tmp, tmp->oldwriteformat))
170                         ast_log(LOG_WARNING, "Unable to restore format back to %d\n", tmp->oldwriteformat);
171         }
172         return 0;
173 }
174
175 int ast_writestream(struct ast_filestream *fs, struct ast_frame *f)
176 {
177         struct ast_frame *trf;
178         int res = -1;
179         int alt=0;
180         if (f->frametype == AST_FRAME_VIDEO) {
181                 if (fs->fmt->format < AST_FORMAT_MAX_AUDIO) {
182                         /* This is the audio portion.  Call the video one... */
183                         if (!fs->vfs && fs->filename) {
184                                 /* XXX Support other video formats XXX */
185                                 char *type = "h263";
186                                 fs->vfs = ast_writefile(fs->filename, type, NULL, fs->flags, 0, fs->mode);
187                                 ast_log(LOG_DEBUG, "Opened video output file\n");
188                         }
189                         if (fs->vfs)
190                                 return ast_writestream(fs->vfs, f);
191                         /* Ignore */
192                         return 0;                               
193                 } else {
194                         /* Might / might not have mark set */
195                         alt = 1;
196                 }
197         } else if (f->frametype != AST_FRAME_VOICE) {
198                 ast_log(LOG_WARNING, "Tried to write non-voice frame\n");
199                 return -1;
200         }
201         if (((fs->fmt->format | alt) & f->subclass) == f->subclass) {
202                 res =  fs->fmt->write(fs, f);
203                 if (res < 0) 
204                         ast_log(LOG_WARNING, "Natural write failed\n");
205                 if (res > 0)
206                         ast_log(LOG_WARNING, "Huh??\n");
207                 return res;
208         } else {
209                 /* XXX If they try to send us a type of frame that isn't the normal frame, and isn't
210                        the one we've setup a translator for, we do the "wrong thing" XXX */
211                 if (fs->trans && (f->subclass != fs->lastwriteformat)) {
212                         ast_translator_free_path(fs->trans);
213                         fs->trans = NULL;
214                 }
215                 if (!fs->trans) 
216                         fs->trans = ast_translator_build_path(fs->fmt->format, f->subclass);
217                 if (!fs->trans)
218                         ast_log(LOG_WARNING, "Unable to translate to format %s, source format %d\n", fs->fmt->name, f->subclass);
219                 else {
220                         fs->lastwriteformat = f->subclass;
221                         res = 0;
222                         /* Get the translated frame but don't consume the original in case they're using it on another stream */
223                         trf = ast_translate(fs->trans, f, 0);
224                         if (trf) {
225                                 res = fs->fmt->write(fs, trf);
226                                 if (res) 
227                                         ast_log(LOG_WARNING, "Translated frame write failed\n");
228                         } else
229                                 res = 0;
230                 }
231                 return res;
232         }
233 }
234
235 static int copy(char *infile, char *outfile)
236 {
237         int ifd;
238         int ofd;
239         int res;
240         int len;
241         char buf[4096];
242         if ((ifd = open(infile, O_RDONLY)) < 0) {
243                 ast_log(LOG_WARNING, "Unable to open %s in read-only mode\n", infile);
244                 return -1;
245         }
246         if ((ofd = open(outfile, O_WRONLY | O_TRUNC | O_CREAT, 0600)) < 0) {
247                 ast_log(LOG_WARNING, "Unable to open %s in write-only mode\n", outfile);
248                 close(ifd);
249                 return -1;
250         }
251         do {
252                 len = read(ifd, buf, sizeof(buf));
253                 if (len < 0) {
254                         ast_log(LOG_WARNING, "Read failed on %s: %s\n", infile, strerror(errno));
255                         close(ifd);
256                         close(ofd);
257                         unlink(outfile);
258                 }
259                 if (len) {
260                         res = write(ofd, buf, len);
261                         if (res != len) {
262                                 ast_log(LOG_WARNING, "Write failed on %s (%d of %d): %s\n", outfile, res, len, strerror(errno));
263                                 close(ifd);
264                                 close(ofd);
265                                 unlink(outfile);
266                         }
267                 }
268         } while(len);
269         close(ifd);
270         close(ofd);
271         return 0;
272 }
273
274 static char *build_filename(char *filename, char *ext)
275 {
276         char *fn;
277         char tmp[AST_CONFIG_MAX_PATH];
278         snprintf(tmp,sizeof(tmp)-1,"%s/%s",(char *)ast_config_AST_VAR_DIR,"sounds");
279         fn = malloc(strlen(tmp) + strlen(filename) + strlen(ext) + 10);
280         if (fn) {
281                 if (filename[0] == '/') 
282                         sprintf(fn, "%s.%s", filename, ext);
283                 else
284                         sprintf(fn, "%s/%s.%s", (char *)tmp, filename, ext);
285         }
286         return fn;
287         
288 }
289
290 #define ACTION_EXISTS 1
291 #define ACTION_DELETE 2
292 #define ACTION_RENAME 3
293 #define ACTION_OPEN   4
294 #define ACTION_COPY   5
295
296 static int ast_filehelper(char *filename, char *filename2, char *fmt, int action)
297 {
298         struct stat st;
299         struct ast_format *f;
300         struct ast_filestream *s;
301         int res=0, ret = 0;
302         char *ext=NULL, *exts, *fn, *nfn;
303         struct ast_channel *chan = (struct ast_channel *)filename2;
304         
305         /* Start with negative response */
306         if (action == ACTION_EXISTS)
307                 res = 0;
308         else
309                 res = -1;
310         if (action == ACTION_OPEN)
311                 ret = -1;
312         /* Check for a specific format */
313         if (ast_pthread_mutex_lock(&formatlock)) {
314                 ast_log(LOG_WARNING, "Unable to lock format list\n");
315                 if (action == ACTION_EXISTS)
316                         return 0;
317                 else
318                         return -1;
319         }
320         f = formats;
321         while(f) {
322                 if (!fmt || !strcasecmp(f->name, fmt)) {
323                         char *stringp=NULL;
324                         exts = strdup(f->exts);
325                         /* Try each kind of extension */
326                         stringp=exts;
327                         ext = strsep(&stringp, "|");
328                         do {
329                                 fn = build_filename(filename, ext);
330                                 if (fn) {
331                                         res = stat(fn, &st);
332                                         if (!res) {
333                                                 switch(action) {
334                                                 case ACTION_EXISTS:
335                                                         ret |= f->format;
336                                                         break;
337                                                 case ACTION_DELETE:
338                                                         res = unlink(fn);
339                                                         if (res)
340                                                                 ast_log(LOG_WARNING, "unlink(%s) failed: %s\n", fn, strerror(errno));
341                                                         break;
342                                                 case ACTION_RENAME:
343                                                         nfn = build_filename(filename2, ext);
344                                                         if (nfn) {
345                                                                 res = rename(fn, nfn);
346                                                                 if (res)
347                                                                         ast_log(LOG_WARNING, "rename(%s,%s) failed: %s\n", fn, nfn, strerror(errno));
348                                                                 free(nfn);
349                                                         } else
350                                                                 ast_log(LOG_WARNING, "Out of memory\n");
351                                                         break;
352                                                 case ACTION_COPY:
353                                                         nfn = build_filename(filename2, ext);
354                                                         if (nfn) {
355                                                                 res = copy(fn, nfn);
356                                                                 if (res)
357                                                                         ast_log(LOG_WARNING, "copy(%s,%s) failed: %s\n", fn, nfn, strerror(errno));
358                                                                 free(nfn);
359                                                         } else
360                                                                 ast_log(LOG_WARNING, "Out of memory\n");
361                                                         break;
362                                                 case ACTION_OPEN:
363                                                         if ((ret < 0) && ((chan->writeformat & f->format) ||
364                                                                                 ((f->format >= AST_FORMAT_MAX_AUDIO) && fmt))) {
365                                                                 ret = open(fn, O_RDONLY);
366                                                                 if (ret >= 0) {
367                                                                         s = f->open(ret);
368                                                                         if (s) {
369                                                                                 s->lasttimeout = -1;
370                                                                                 s->fmt = f;
371                                                                                 s->trans = NULL;
372                                                                                 s->filename = NULL;
373                                                                                 if (s->fmt->format < AST_FORMAT_MAX_AUDIO)
374                                                                                         chan->stream = s;
375                                                                                 else
376                                                                                         chan->vstream = s;
377                                                                         } else {
378                                                                                 close(ret);
379                                                                                 ast_log(LOG_WARNING, "Unable to open fd on %s\n", filename);
380                                                                         }
381                                                                 } else
382                                                                         ast_log(LOG_WARNING, "Couldn't open file %s\n", fn);
383                                                         }
384                                                         break;
385                                                 default:
386                                                         ast_log(LOG_WARNING, "Unknown helper %d\n", action);
387                                                 }
388                                                 /* Conveniently this logic is the same for all */
389                                                 if (res)
390                                                         break;
391                                         }
392                                         free(fn);
393                                 }
394                                 ext = strsep(&stringp, "|");
395                         } while(ext);
396                         free(exts);
397                 }
398                 f = f->next;
399         }
400         ast_pthread_mutex_unlock(&formatlock);
401         if ((action == ACTION_EXISTS) || (action == ACTION_OPEN))
402                 res = ret ? ret : -1;
403         return res;
404 }
405
406 struct ast_filestream *ast_openstream(struct ast_channel *chan, char *filename, char *preflang)
407 {
408         /* This is a fairly complex routine.  Essentially we should do 
409            the following:
410            
411            1) Find which file handlers produce our type of format.
412            2) Look for a filename which it can handle.
413            3) If we find one, then great.  
414            4) If not, see what files are there
415            5) See what we can actually support
416            6) Choose the one with the least costly translator path and
417                set it up.
418                    
419         */
420         int fd = -1;
421         int fmts = -1;
422         char filename2[256];
423         char lang2[MAX_LANGUAGE];
424         int res;
425         ast_stopstream(chan);
426         /* do this first, otherwise we detect the wrong writeformat */
427         if (chan->generator)
428                 ast_deactivate_generator(chan);
429         if (preflang && strlen(preflang)) {
430                 snprintf(filename2, sizeof(filename2), "%s/%s", preflang, filename);
431                 fmts = ast_fileexists(filename2, NULL, NULL);
432                 if (fmts < 1) {
433                         strncpy(lang2, preflang, sizeof(lang2)-1);
434                         snprintf(filename2, sizeof(filename2), "%s/%s", lang2, filename);
435                         fmts = ast_fileexists(filename2, NULL, NULL);
436                 }
437         }
438         if (fmts < 1) {
439                 strncpy(filename2, filename, sizeof(filename2)-1);
440                 fmts = ast_fileexists(filename2, NULL, NULL);
441         }
442         if (fmts < 1) {
443                 ast_log(LOG_WARNING, "File %s does not exist in any format\n", filename);
444                 return NULL;
445         }
446         chan->oldwriteformat = chan->writeformat;
447         /* Set the channel to a format we can work with */
448         res = ast_set_write_format(chan, fmts);
449         
450         fd = ast_filehelper(filename2, (char *)chan, NULL, ACTION_OPEN);
451         if(fd >= 0)
452                 return chan->stream;
453         return NULL;
454 }
455
456 struct ast_filestream *ast_openvstream(struct ast_channel *chan, char *filename, char *preflang)
457 {
458         /* This is a fairly complex routine.  Essentially we should do 
459            the following:
460            
461            1) Find which file handlers produce our type of format.
462            2) Look for a filename which it can handle.
463            3) If we find one, then great.  
464            4) If not, see what files are there
465            5) See what we can actually support
466            6) Choose the one with the least costly translator path and
467                set it up.
468                    
469         */
470         int fd = -1;
471         int fmts = -1;
472         char filename2[256];
473         char lang2[MAX_LANGUAGE];
474         /* XXX H.263 only XXX */
475         char *fmt = "h263";
476         if (preflang && strlen(preflang)) {
477                 snprintf(filename2, sizeof(filename2), "%s/%s", preflang, filename);
478                 fmts = ast_fileexists(filename2, fmt, NULL);
479                 if (fmts < 1) {
480                         strncpy(lang2, preflang, sizeof(lang2)-1);
481                         snprintf(filename2, sizeof(filename2), "%s/%s", lang2, filename);
482                         fmts = ast_fileexists(filename2, fmt, NULL);
483                 }
484         }
485         if (fmts < 1) {
486                 strncpy(filename2, filename, sizeof(filename2)-1);
487                 fmts = ast_fileexists(filename2, fmt, NULL);
488         }
489         if (fmts < 1) {
490                 return NULL;
491         }
492         fd = ast_filehelper(filename2, (char *)chan, fmt, ACTION_OPEN);
493         if(fd >= 0)
494                 return chan->vstream;
495         ast_log(LOG_WARNING, "File %s has video but couldn't be opened\n", filename);
496         return NULL;
497 }
498
499 static int ast_readaudio_callback(void *data)
500 {
501         struct ast_filestream *s = data;
502         struct ast_frame *fr;
503         int whennext = 0;
504
505         while(!whennext) {
506                 fr = s->fmt->read(s, &whennext);
507                 if (fr) {
508                         if (ast_write(s->owner, fr)) {
509                                 ast_log(LOG_WARNING, "Failed to write frame\n");
510                                 s->owner->streamid = -1;
511 #ifdef ZAPTEL_OPTIMIZATIONS
512                                 ast_settimeout(s->owner, 0, NULL, NULL);
513 #endif                  
514                                 return 0;
515                         }
516                 } else {
517                         /* Stream has finished */
518                         s->owner->streamid = -1;
519 #ifdef ZAPTEL_OPTIMIZATIONS
520                         ast_settimeout(s->owner, 0, NULL, NULL);
521 #endif                  
522                         return 0;
523                 }
524         }
525         if (whennext != s->lasttimeout) {
526 #ifdef ZAPTEL_OPTIMIZATIONS
527                 if (s->owner->timingfd > -1)
528                         ast_settimeout(s->owner, whennext, ast_readaudio_callback, s);
529                 else
530 #endif          
531                         s->owner->streamid = ast_sched_add(s->owner->sched, whennext/8, ast_readaudio_callback, s);
532                 s->lasttimeout = whennext;
533                 return 0;
534         }
535         return 1;
536 }
537
538 static int ast_readvideo_callback(void *data)
539 {
540         struct ast_filestream *s = data;
541         struct ast_frame *fr;
542         int whennext = 0;
543
544         while(!whennext) {
545                 fr = s->fmt->read(s, &whennext);
546                 if (fr) {
547                         if (ast_write(s->owner, fr)) {
548                                 ast_log(LOG_WARNING, "Failed to write frame\n");
549                                 s->owner->vstreamid = -1;
550                                 return 0;
551                         }
552                 } else {
553                         /* Stream has finished */
554                         s->owner->vstreamid = -1;
555                         return 0;
556                 }
557         }
558         if (whennext != s->lasttimeout) {
559                 s->owner->vstreamid = ast_sched_add(s->owner->sched, whennext/8, ast_readvideo_callback, s);
560                 s->lasttimeout = whennext;
561                 return 0;
562         }
563         return 1;
564 }
565
566 int ast_applystream(struct ast_channel *chan, struct ast_filestream *s)
567 {
568         s->owner = chan;
569         return 0;
570 }
571
572 int ast_playstream(struct ast_filestream *s)
573 {
574         if (s->fmt->format < AST_FORMAT_MAX_AUDIO)
575                 ast_readaudio_callback(s);
576         else
577                 ast_readvideo_callback(s);
578         return 0;
579 }
580
581 int ast_seekstream(struct ast_filestream *fs, long sample_offset, int whence)
582 {
583         return fs->fmt->seek(fs, sample_offset, whence);
584 }
585
586 int ast_truncstream(struct ast_filestream *fs)
587 {
588         return fs->fmt->trunc(fs);
589 }
590
591 long ast_tellstream(struct ast_filestream *fs)
592 {
593         return fs->fmt->tell(fs);
594 }
595
596 int ast_stream_fastforward(struct ast_filestream *fs, long ms)
597 {
598         /* I think this is right, 8000 samples per second, 1000 ms a second so 8
599          * samples per ms  */
600         long samples = ms * 8;
601         return ast_seekstream(fs, samples, SEEK_CUR);
602 }
603
604 int ast_stream_rewind(struct ast_filestream *fs, long ms)
605 {
606         long samples = ms * 8;
607         samples = samples * -1;
608         return ast_seekstream(fs, samples, SEEK_CUR);
609 }
610
611 int ast_closestream(struct ast_filestream *f)
612 {
613         /* Stop a running stream if there is one */
614         if (f->owner) {
615                 if (f->fmt->format < AST_FORMAT_MAX_AUDIO) {
616                         f->owner->stream = NULL;
617                         if (f->owner->streamid > -1)
618                                 ast_sched_del(f->owner->sched, f->owner->streamid);
619                         f->owner->streamid = -1;
620 #ifdef ZAPTEL_OPTIMIZATIONS
621                         ast_settimeout(f->owner, 0, NULL, NULL);
622 #endif                  
623                 } else {
624                         f->owner->vstream = NULL;
625                         if (f->owner->vstreamid > -1)
626                                 ast_sched_del(f->owner->sched, f->owner->vstreamid);
627                         f->owner->vstreamid = -1;
628                 }
629         }
630         /* destroy the translator on exit */
631         if (f->trans) {
632                 ast_translator_free_path(f->trans);
633                 f->trans = NULL;
634         }
635         if (f->filename)
636                 free(f->filename);
637         f->filename = NULL;
638         f->fmt->close(f);
639         return 0;
640 }
641
642
643 int ast_fileexists(char *filename, char *fmt, char *preflang)
644 {
645         char filename2[256];
646         char tmp[256];
647         char *postfix;
648         char *prefix;
649         char *c;
650         char lang2[MAX_LANGUAGE];
651         int res = -1;
652         if (preflang && strlen(preflang)) {
653                 /* Insert the language between the last two parts of the path */
654                 strncpy(tmp, filename, sizeof(tmp) - 1);
655                 c = strrchr(tmp, '/');
656                 if (c) {
657                         *c = '\0';
658                         postfix = c+1;
659                         prefix = tmp;
660                 } else {
661                         postfix = tmp;
662                         prefix="";
663                 }
664                 snprintf(filename2, sizeof(filename2), "%s/%s/%s", prefix, preflang, postfix);
665                 res = ast_filehelper(filename2, NULL, fmt, ACTION_EXISTS);
666                 if (res < 1) {
667                         char *stringp=NULL;
668                         strncpy(lang2, preflang, sizeof(lang2)-1);
669                         stringp=lang2;
670                         strsep(&stringp, "_");
671                         if (strcmp(lang2, preflang)) {
672                                 snprintf(filename2, sizeof(filename2), "%s/%s/%s", prefix, lang2, postfix);
673                                 res = ast_filehelper(filename2, NULL, fmt, ACTION_EXISTS);
674                         }
675                 }
676         }
677         if (res < 1) {
678                 res = ast_filehelper(filename, NULL, fmt, ACTION_EXISTS);
679         }
680         return res;
681 }
682
683 int ast_filedelete(char *filename, char *fmt)
684 {
685         return ast_filehelper(filename, NULL, fmt, ACTION_DELETE);
686 }
687
688 int ast_filerename(char *filename, char *filename2, char *fmt)
689 {
690         return ast_filehelper(filename, filename2, fmt, ACTION_RENAME);
691 }
692
693 int ast_filecopy(char *filename, char *filename2, char *fmt)
694 {
695         return ast_filehelper(filename, filename2, fmt, ACTION_COPY);
696 }
697
698 int ast_streamfile(struct ast_channel *chan, char *filename, char *preflang)
699 {
700         struct ast_filestream *fs;
701         struct ast_filestream *vfs;
702
703         fs = ast_openstream(chan, filename, preflang);
704         vfs = ast_openvstream(chan, filename, preflang);
705         if (vfs)
706                 ast_log(LOG_DEBUG, "Ooh, found a video stream, too\n");
707         if(fs){
708                 if(ast_applystream(chan, fs))
709                         return -1;
710                 if(vfs && ast_applystream(chan, vfs))
711                         return -1;
712                 if(ast_playstream(fs))
713                         return -1;
714                 if(vfs && ast_playstream(vfs))
715                         return -1;
716 #if 1
717                 if (option_verbose > 2)
718                         ast_verbose(VERBOSE_PREFIX_3 "Playing '%s'\n", filename);
719 #endif
720                 return 0;
721         }
722         ast_log(LOG_WARNING, "Unable to open %s (format %d): %s\n", filename, chan->nativeformats, strerror(errno));
723         return -1;
724 }
725
726
727 struct ast_filestream *ast_writefile(char *filename, char *type, char *comment, int flags, int check, mode_t mode)
728 {
729         int fd,myflags;
730         struct ast_format *f;
731         struct ast_filestream *fs=NULL;
732         char *fn;
733         char *ext;
734         if (ast_pthread_mutex_lock(&formatlock)) {
735                 ast_log(LOG_WARNING, "Unable to lock format list\n");
736                 return NULL;
737         }
738         myflags = 0;
739         /* set the O_TRUNC flag if and only if there is no O_APPEND specified */
740         if (!(flags & O_APPEND)) myflags = O_TRUNC;
741         f = formats;
742         while(f) {
743                 if (!strcasecmp(f->name, type)) {
744                         char *stringp=NULL;
745                         /* XXX Implement check XXX */
746                         ext = strdup(f->exts);
747                         stringp=ext;
748                         ext = strsep(&stringp, "|");
749                         fn = build_filename(filename, ext);
750                         fd = open(fn, flags | myflags | O_WRONLY | O_CREAT, mode);
751                         if (fd >= 0) {
752                                 errno = 0;
753                                 if ((fs = f->rewrite(fd, comment))) {
754                                         fs->trans = NULL;
755                                         fs->fmt = f;
756                                         fs->flags = flags;
757                                         fs->mode = mode;
758                                         fs->filename = strdup(filename);
759                                         fs->vfs = NULL;
760                                 } else {
761                                         ast_log(LOG_WARNING, "Unable to rewrite %s\n", fn);
762                                         close(fd);
763                                         unlink(fn);
764                                 }
765                         } else if (errno != EEXIST)
766                                 ast_log(LOG_WARNING, "Unable to open file %s: %s\n", fn, strerror(errno));
767                         free(fn);
768                         free(ext);
769                         break;
770                 }
771                 f = f->next;
772         }
773         ast_pthread_mutex_unlock(&formatlock);
774         if (!f) 
775                 ast_log(LOG_WARNING, "No such format '%s'\n", type);
776         return fs;
777 }
778
779 char ast_waitstream(struct ast_channel *c, char *breakon)
780 {
781         /* XXX Maybe I should just front-end ast_waitstream_full ? XXX */
782         int res;
783         struct ast_frame *fr;
784         while(c->stream) {
785                 res = ast_sched_wait(c->sched);
786                 if ((res < 0) && !c->timingfunc) {
787                         ast_stopstream(c);
788                         break;
789                 }
790                 if (res < 0)
791                         res = 1000;
792                 res = ast_waitfor(c, res);
793                 if (res < 0) {
794                         ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
795                         return res;
796                 } else if (res > 0) {
797                         fr = ast_read(c);
798                         if (!fr) {
799 #if 0
800                                 ast_log(LOG_DEBUG, "Got hung up\n");
801 #endif
802                                 return -1;
803                         }
804                         
805                         switch(fr->frametype) {
806                         case AST_FRAME_DTMF:
807                                 res = fr->subclass;
808                                 if (strchr(breakon, res)) {
809                                         ast_frfree(fr);
810                                         return res;
811                                 }
812                                 break;
813                         case AST_FRAME_CONTROL:
814                                 switch(fr->subclass) {
815                                 case AST_CONTROL_HANGUP:
816                                         ast_frfree(fr);
817                                         return -1;
818                                 case AST_CONTROL_RINGING:
819                                 case AST_CONTROL_ANSWER:
820                                         /* Unimportant */
821                                         break;
822                                 default:
823                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
824                                 }
825                         }
826                         /* Ignore */
827                         ast_frfree(fr);
828                 }
829                 ast_sched_runq(c->sched);
830         }
831         return (c->_softhangup ? -1 : 0);
832 }
833
834 char ast_waitstream_fr(struct ast_channel *c, char *breakon, char *forward, char *rewind, int ms)
835 {
836         int res;
837         struct ast_frame *fr;
838         while(c->stream) {
839                 res = ast_sched_wait(c->sched);
840                 if ((res < 0) && !c->timingfunc) {
841                         ast_stopstream(c);
842                         break;
843                 }
844                 if (res < 0)
845                         res = 1000;
846                 res = ast_waitfor(c, res);
847                 if (res < 0) {
848                         ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
849                         return res;
850                 } else
851                 if (res > 0) {
852                         fr = ast_read(c);
853                         if (!fr) {
854 #if 0
855                                 ast_log(LOG_DEBUG, "Got hung up\n");
856 #endif
857                                 return -1;
858                         }
859                         
860                         switch(fr->frametype) {
861                         case AST_FRAME_DTMF:
862                                 res = fr->subclass;
863                                 if (strchr(forward,res)) {
864                                         ast_stream_fastforward(c->stream, ms);
865                                 } else if (strchr(rewind,res)) {
866                                         ast_stream_rewind(c->stream, ms);
867                                 } else if (strchr(breakon, res)) {
868                                         ast_frfree(fr);
869                                         return res;
870                                 }                                       
871                                 break;
872                         case AST_FRAME_CONTROL:
873                                 switch(fr->subclass) {
874                                 case AST_CONTROL_HANGUP:
875                                         ast_frfree(fr);
876                                         return -1;
877                                 case AST_CONTROL_RINGING:
878                                 case AST_CONTROL_ANSWER:
879                                         /* Unimportant */
880                                         break;
881                                 default:
882                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
883                                 }
884                         }
885                         /* Ignore */
886                         ast_frfree(fr);
887                 } else
888                         ast_sched_runq(c->sched);
889         
890                 
891         }
892         return (c->_softhangup ? -1 : 0);
893 }
894
895 char ast_waitstream_full(struct ast_channel *c, char *breakon, int audiofd, int cmdfd)
896 {
897         int res;
898         int ms;
899         int outfd;
900         struct ast_frame *fr;
901         struct ast_channel *rchan;
902         
903         while(c->stream) {
904                 ms = ast_sched_wait(c->sched);
905                 if ((ms < 0) && !c->timingfunc) {
906                         ast_stopstream(c);
907                         break;
908                 }
909                 if (ms < 0)
910                         ms = 1000;
911                 rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
912                 if (!rchan && (outfd < 0) && (ms)) {
913                         ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
914                         return -1;
915                 } else if (outfd > -1) {
916                         /* The FD we were watching has something waiting */
917                         return 1;
918                 } else if (rchan) {
919                         fr = ast_read(c);
920                         if (!fr) {
921 #if 0
922                                 ast_log(LOG_DEBUG, "Got hung up\n");
923 #endif
924                                 return -1;
925                         }
926                         
927                         switch(fr->frametype) {
928                         case AST_FRAME_DTMF:
929                                 res = fr->subclass;
930                                 if (strchr(breakon, res)) {
931                                         ast_frfree(fr);
932                                         return res;
933                                 }
934                                 break;
935                         case AST_FRAME_CONTROL:
936                                 switch(fr->subclass) {
937                                 case AST_CONTROL_HANGUP:
938                                         ast_frfree(fr);
939                                         return -1;
940                                 case AST_CONTROL_RINGING:
941                                 case AST_CONTROL_ANSWER:
942                                         /* Unimportant */
943                                         break;
944                                 default:
945                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
946                                 }
947                         case AST_FRAME_VOICE:
948                                 /* Write audio if appropriate */
949                                 if (audiofd > -1)
950                                         write(audiofd, fr->data, fr->datalen);
951                         }
952                         /* Ignore */
953                         ast_frfree(fr);
954                 }
955                 ast_sched_runq(c->sched);
956         
957                 
958         }
959         return (c->_softhangup ? -1 : 0);
960 }