Still store timing
[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         if (f->filename)
631                 free(f->filename);
632         f->filename = NULL;
633         f->fmt->close(f);
634         return 0;
635 }
636
637
638 int ast_fileexists(char *filename, char *fmt, char *preflang)
639 {
640         char filename2[256];
641         char tmp[256];
642         char *postfix;
643         char *prefix;
644         char *c;
645         char lang2[MAX_LANGUAGE];
646         int res = -1;
647         if (preflang && strlen(preflang)) {
648                 /* Insert the language between the last two parts of the path */
649                 strncpy(tmp, filename, sizeof(tmp) - 1);
650                 c = strrchr(tmp, '/');
651                 if (c) {
652                         *c = '\0';
653                         postfix = c+1;
654                         prefix = tmp;
655                 } else {
656                         postfix = tmp;
657                         prefix="";
658                 }
659                 snprintf(filename2, sizeof(filename2), "%s/%s/%s", prefix, preflang, postfix);
660                 res = ast_filehelper(filename2, NULL, fmt, ACTION_EXISTS);
661                 if (res < 1) {
662                         char *stringp=NULL;
663                         strncpy(lang2, preflang, sizeof(lang2)-1);
664                         stringp=lang2;
665                         strsep(&stringp, "_");
666                         if (strcmp(lang2, preflang)) {
667                                 snprintf(filename2, sizeof(filename2), "%s/%s/%s", prefix, lang2, postfix);
668                                 res = ast_filehelper(filename2, NULL, fmt, ACTION_EXISTS);
669                         }
670                 }
671         }
672         if (res < 1) {
673                 res = ast_filehelper(filename, NULL, fmt, ACTION_EXISTS);
674         }
675         return res;
676 }
677
678 int ast_filedelete(char *filename, char *fmt)
679 {
680         return ast_filehelper(filename, NULL, fmt, ACTION_DELETE);
681 }
682
683 int ast_filerename(char *filename, char *filename2, char *fmt)
684 {
685         return ast_filehelper(filename, filename2, fmt, ACTION_RENAME);
686 }
687
688 int ast_filecopy(char *filename, char *filename2, char *fmt)
689 {
690         return ast_filehelper(filename, filename2, fmt, ACTION_COPY);
691 }
692
693 int ast_streamfile(struct ast_channel *chan, char *filename, char *preflang)
694 {
695         struct ast_filestream *fs;
696         struct ast_filestream *vfs;
697
698         fs = ast_openstream(chan, filename, preflang);
699         vfs = ast_openvstream(chan, filename, preflang);
700         if (vfs)
701                 ast_log(LOG_DEBUG, "Ooh, found a video stream, too\n");
702         if(fs){
703                 if(ast_applystream(chan, fs))
704                         return -1;
705                 if(vfs && ast_applystream(chan, vfs))
706                         return -1;
707                 if(ast_playstream(fs))
708                         return -1;
709                 if(vfs && ast_playstream(vfs))
710                         return -1;
711 #if 1
712                 if (option_verbose > 2)
713                         ast_verbose(VERBOSE_PREFIX_3 "Playing '%s'\n", filename);
714 #endif
715                 return 0;
716         }
717         ast_log(LOG_WARNING, "Unable to open %s (format %d): %s\n", filename, chan->nativeformats, strerror(errno));
718         return -1;
719 }
720
721
722 struct ast_filestream *ast_writefile(char *filename, char *type, char *comment, int flags, int check, mode_t mode)
723 {
724         int fd,myflags;
725         struct ast_format *f;
726         struct ast_filestream *fs=NULL;
727         char *fn;
728         char *ext;
729         if (ast_pthread_mutex_lock(&formatlock)) {
730                 ast_log(LOG_WARNING, "Unable to lock format list\n");
731                 return NULL;
732         }
733         myflags = 0;
734         /* set the O_TRUNC flag if and only if there is no O_APPEND specified */
735         if (!(flags & O_APPEND)) myflags = O_TRUNC;
736         f = formats;
737         while(f) {
738                 if (!strcasecmp(f->name, type)) {
739                         char *stringp=NULL;
740                         /* XXX Implement check XXX */
741                         ext = strdup(f->exts);
742                         stringp=ext;
743                         ext = strsep(&stringp, "|");
744                         fn = build_filename(filename, ext);
745                         fd = open(fn, flags | myflags | O_WRONLY | O_CREAT, mode);
746                         if (fd >= 0) {
747                                 errno = 0;
748                                 if ((fs = f->rewrite(fd, comment))) {
749                                         fs->trans = NULL;
750                                         fs->fmt = f;
751                                         fs->flags = flags;
752                                         fs->mode = mode;
753                                         fs->filename = strdup(filename);
754                                         fs->vfs = NULL;
755                                 } else {
756                                         ast_log(LOG_WARNING, "Unable to rewrite %s\n", fn);
757                                         close(fd);
758                                         unlink(fn);
759                                 }
760                         } else if (errno != EEXIST)
761                                 ast_log(LOG_WARNING, "Unable to open file %s: %s\n", fn, strerror(errno));
762                         free(fn);
763                         free(ext);
764                         break;
765                 }
766                 f = f->next;
767         }
768         ast_pthread_mutex_unlock(&formatlock);
769         if (!f) 
770                 ast_log(LOG_WARNING, "No such format '%s'\n", type);
771         return fs;
772 }
773
774 char ast_waitstream(struct ast_channel *c, char *breakon)
775 {
776         /* XXX Maybe I should just front-end ast_waitstream_full ? XXX */
777         int res;
778         struct ast_frame *fr;
779         while(c->stream) {
780                 res = ast_sched_wait(c->sched);
781                 if ((res < 0) && !c->timingfunc) {
782                         ast_stopstream(c);
783                         break;
784                 }
785                 if (res < 0)
786                         res = 1000;
787                 res = ast_waitfor(c, res);
788                 if (res < 0) {
789                         ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
790                         return res;
791                 } else if (res > 0) {
792                         fr = ast_read(c);
793                         if (!fr) {
794 #if 0
795                                 ast_log(LOG_DEBUG, "Got hung up\n");
796 #endif
797                                 return -1;
798                         }
799                         
800                         switch(fr->frametype) {
801                         case AST_FRAME_DTMF:
802                                 res = fr->subclass;
803                                 if (strchr(breakon, res)) {
804                                         ast_frfree(fr);
805                                         return res;
806                                 }
807                                 break;
808                         case AST_FRAME_CONTROL:
809                                 switch(fr->subclass) {
810                                 case AST_CONTROL_HANGUP:
811                                         ast_frfree(fr);
812                                         return -1;
813                                 case AST_CONTROL_RINGING:
814                                 case AST_CONTROL_ANSWER:
815                                         /* Unimportant */
816                                         break;
817                                 default:
818                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
819                                 }
820                         }
821                         /* Ignore */
822                         ast_frfree(fr);
823                 }
824                 ast_sched_runq(c->sched);
825         }
826         return (c->_softhangup ? -1 : 0);
827 }
828
829 char ast_waitstream_fr(struct ast_channel *c, char *breakon, char *forward, char *rewind, int ms)
830 {
831         int res;
832         struct ast_frame *fr;
833         while(c->stream) {
834                 res = ast_sched_wait(c->sched);
835                 if ((res < 0) && !c->timingfunc) {
836                         ast_stopstream(c);
837                         break;
838                 }
839                 if (res < 0)
840                         res = 1000;
841                 res = ast_waitfor(c, res);
842                 if (res < 0) {
843                         ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
844                         return res;
845                 } else
846                 if (res > 0) {
847                         fr = ast_read(c);
848                         if (!fr) {
849 #if 0
850                                 ast_log(LOG_DEBUG, "Got hung up\n");
851 #endif
852                                 return -1;
853                         }
854                         
855                         switch(fr->frametype) {
856                         case AST_FRAME_DTMF:
857                                 res = fr->subclass;
858                                 if (strchr(forward,res)) {
859                                         ast_stream_fastforward(c->stream, ms);
860                                 } else if (strchr(rewind,res)) {
861                                         ast_stream_rewind(c->stream, ms);
862                                 } else if (strchr(breakon, res)) {
863                                         ast_frfree(fr);
864                                         return res;
865                                 }                                       
866                                 break;
867                         case AST_FRAME_CONTROL:
868                                 switch(fr->subclass) {
869                                 case AST_CONTROL_HANGUP:
870                                         ast_frfree(fr);
871                                         return -1;
872                                 case AST_CONTROL_RINGING:
873                                 case AST_CONTROL_ANSWER:
874                                         /* Unimportant */
875                                         break;
876                                 default:
877                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
878                                 }
879                         }
880                         /* Ignore */
881                         ast_frfree(fr);
882                 } else
883                         ast_sched_runq(c->sched);
884         
885                 
886         }
887         return (c->_softhangup ? -1 : 0);
888 }
889
890 char ast_waitstream_full(struct ast_channel *c, char *breakon, int audiofd, int cmdfd)
891 {
892         int res;
893         int ms;
894         int outfd;
895         struct ast_frame *fr;
896         struct ast_channel *rchan;
897         
898         while(c->stream) {
899                 ms = ast_sched_wait(c->sched);
900                 if ((ms < 0) && !c->timingfunc) {
901                         ast_stopstream(c);
902                         break;
903                 }
904                 if (ms < 0)
905                         ms = 1000;
906                 rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
907                 if (!rchan && (outfd < 0) && (ms)) {
908                         ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
909                         return -1;
910                 } else if (outfd > -1) {
911                         /* The FD we were watching has something waiting */
912                         return 1;
913                 } else if (rchan) {
914                         fr = ast_read(c);
915                         if (!fr) {
916 #if 0
917                                 ast_log(LOG_DEBUG, "Got hung up\n");
918 #endif
919                                 return -1;
920                         }
921                         
922                         switch(fr->frametype) {
923                         case AST_FRAME_DTMF:
924                                 res = fr->subclass;
925                                 if (strchr(breakon, res)) {
926                                         ast_frfree(fr);
927                                         return res;
928                                 }
929                                 break;
930                         case AST_FRAME_CONTROL:
931                                 switch(fr->subclass) {
932                                 case AST_CONTROL_HANGUP:
933                                         ast_frfree(fr);
934                                         return -1;
935                                 case AST_CONTROL_RINGING:
936                                 case AST_CONTROL_ANSWER:
937                                         /* Unimportant */
938                                         break;
939                                 default:
940                                         ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
941                                 }
942                         case AST_FRAME_VOICE:
943                                 /* Write audio if appropriate */
944                                 if (audiofd > -1)
945                                         write(audiofd, fr->data, fr->datalen);
946                         }
947                         /* Ignore */
948                         ast_frfree(fr);
949                 }
950                 ast_sched_runq(c->sched);
951         
952                 
953         }
954         return (c->_softhangup ? -1 : 0);
955 }