file.c File Reference

Generic File Format Support. More...

#include "asterisk.h"
#include <dirent.h>
#include <sys/stat.h>
#include "asterisk/_private.h"
#include "asterisk/paths.h"
#include "asterisk/mod_format.h"
#include "asterisk/cli.h"
#include "asterisk/channel.h"
#include "asterisk/sched.h"
#include "asterisk/translate.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/pbx.h"
#include "asterisk/linkedlists.h"
#include "asterisk/module.h"
#include "asterisk/astobj2.h"

Include dependency graph for file.c:

Go to the source code of this file.

Data Structures
struct	formats
Defines
#define	FORMAT   "%-10s %-10s %-20s\n"
#define	FORMAT2   "%-10s %-10s %-20s\n"
Enumerations
enum	file_action {   ACTION_EXISTS = 1, ACTION_DELETE, ACTION_RENAME, ACTION_OPEN,   ACTION_COPY }
enum	fsread_res { FSREAD_FAILURE, FSREAD_SUCCESS_SCHED, FSREAD_SUCCESS_NOSCHED }
enum	wrap_fn { WRAP_OPEN, WRAP_REWRITE }
Functions
int	__ast_format_register (const struct ast_format *f, struct ast_module *mod)
	Register a new file format capability. Adds a format to Asterisk's format abilities.
static void	__fini_formats (void)
static void	__init_formats (void)
int	ast_applystream (struct ast_channel *chan, struct ast_filestream *s)
	Applys a open stream to a channel.
int	ast_closestream (struct ast_filestream *f)
	Closes a stream.
int	ast_file_init (void)
int	ast_filecopy (const char *filename, const char *filename2, const char *fmt)
	Copies a file.
int	ast_filedelete (const char *filename, const char *fmt)
	Deletes a file.
int	ast_fileexists (const char *filename, const char *fmt, const char *preflang)
	Checks for the existence of a given file.
static int	ast_filehelper (const char *filename, const void *arg2, const char *fmt, const enum file_action action)
	perform various actions on a file. Second argument arg2 depends on the command: unused for EXISTS and DELETE destination file name (const char *) for COPY and RENAME struct ast_channel * for OPEN if fmt is NULL, OPEN will return the first matching entry, whereas other functions will run on all matching entries.
int	ast_filerename (const char *filename, const char *filename2, const char *fmt)
	Renames a file.
int	ast_format_unregister (const char *name)
	Unregisters a file format.
static int	ast_fsread_audio (const void *data)
static int	ast_fsread_video (const void *data)
struct ast_filestream *	ast_openstream (struct ast_channel *chan, const char *filename, const char *preflang)
	Opens stream for use in seeking, playing.
struct ast_filestream *	ast_openstream_full (struct ast_channel *chan, const char *filename, const char *preflang, int asis)
	Opens stream for use in seeking, playing.
struct ast_filestream *	ast_openvstream (struct ast_channel *chan, const char *filename, const char *preflang)
	Opens stream for use in seeking, playing.
int	ast_playstream (struct ast_filestream *s)
	Play a open stream on a channel.
static enum fsread_res	ast_readaudio_callback (struct ast_filestream *s)
struct ast_filestream *	ast_readfile (const char *filename, const char *type, const char *comment, int flags, int check, mode_t mode)
	Starts reading from a file.
struct ast_frame *	ast_readframe (struct ast_filestream *s)
	Read a frame from a filestream.
static enum fsread_res	ast_readvideo_callback (struct ast_filestream *s)
int	ast_seekstream (struct ast_filestream *fs, off_t sample_offset, int whence)
	Seeks into stream.
int	ast_stopstream (struct ast_channel *tmp)
	Stops a stream.
int	ast_stream_and_wait (struct ast_channel *chan, const char *file, const char *digits)
	stream file until digit If the file name is non-empty, try to play it.
int	ast_stream_fastforward (struct ast_filestream *fs, off_t ms)
	Fast forward stream ms.
int	ast_stream_rewind (struct ast_filestream *fs, off_t ms)
	Rewind stream ms.
int	ast_streamfile (struct ast_channel *chan, const char *filename, const char *preflang)
	Streams a file.
off_t	ast_tellstream (struct ast_filestream *fs)
	Tell where we are in a stream.
int	ast_truncstream (struct ast_filestream *fs)
	Trunc stream at current location.
int	ast_waitstream (struct ast_channel *c, const char *breakon)
	Waits for a stream to stop or digit to be pressed.
int	ast_waitstream_exten (struct ast_channel *c, const char *context)
	Waits for a stream to stop or digit matching a valid one digit exten to be pressed.
int	ast_waitstream_fr (struct ast_channel *c, const char *breakon, const char *forward, const char *rewind, int ms)
	Same as waitstream but allows stream to be forwarded or rewound.
int	ast_waitstream_full (struct ast_channel *c, const char *breakon, int audiofd, int cmdfd)
struct ast_filestream *	ast_writefile (const char *filename, const char *type, const char *comment, int flags, int check, mode_t mode)
	Starts writing a file.
int	ast_writestream (struct ast_filestream *fs, struct ast_frame *f)
	Writes a frame to a stream.
static char *	build_filename (const char *filename, const char *ext)
	construct a filename. Absolute pathnames are preserved, relative names are prefixed by the sounds/ directory. The wav49 suffix is replaced by 'WAV'. Returns a malloc'ed string to be freed by the caller.
static int	copy (const char *infile, const char *outfile)
static int	exts_compare (const char *exts, const char *type)
static int	fileexists_core (const char *filename, const char *fmt, const char *preflang, char *buf, int buflen)
	helper routine to locate a file with a given format and language preference. Try preflang, preflang with stripped '_' suffix, or NULL. In the standard asterisk, language goes just before the last component. In an alternative configuration, the language should be a prefix to the actual filename.
static int	fileexists_test (const char *filename, const char *fmt, const char *lang, char *buf, int buflen)
static void	filestream_destructor (void *arg)
static int	fn_wrapper (struct ast_filestream *s, const char *comment, enum wrap_fn mode)
static struct ast_filestream *	get_filestream (struct ast_format *fmt, FILE *bfile)
static char *	handle_cli_core_show_file_formats (struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
static int	is_absolute_path (const char *filename)
static int	open_wrapper (struct ast_filestream *s)
static struct ast_frame *	read_frame (struct ast_filestream *s, int *whennext)
static int	rewrite_wrapper (struct ast_filestream *s, const char *comment)
static int	waitstream_core (struct ast_channel *c, const char *breakon, const char *forward, const char *rewind, int skip_ms, int audiofd, int cmdfd, const char *context)
	the core of all waitstream() functions
Variables
int	ast_language_is_prefix = 1
struct ast_cli_entry	cli_file []

---

Detailed Description

Generic File Format Support.

Author:

Mark Spencer <markster@digium.com>

Definition in file file.c.

---

Define Documentation

#define FORMAT   "%-10s %-10s %-20s\n"

#define FORMAT2   "%-10s %-10s %-20s\n"

Referenced by __iax2_show_peers(), _sip_show_peers(), dahdi_show_channels(), dahdi_show_status(), dundi_show_mappings(), dundi_show_peers(), dundi_show_precache(), dundi_show_requests(), dundi_show_trans(), handle_cli_core_show_file_formats(), handle_cli_iax2_show_channels(), handle_cli_iax2_show_registry(), handle_cli_iax2_show_users(), handle_core_show_image_formats(), sip_show_channels(), sip_show_inuse(), sip_show_registry(), and sip_show_tcp().

---

Enumeration Type Documentation

enum file_action

Enumerator:

ACTION_EXISTS
ACTION_DELETE
ACTION_RENAME
ACTION_OPEN
ACTION_COPY

Definition at line 389 of file file.c.

                 {
   ACTION_EXISTS = 1, /* return matching format if file exists, 0 otherwise */
   ACTION_DELETE, /* delete file, return 0 on success, -1 on error */
   ACTION_RENAME, /* rename file. return 0 on success, -1 on error */
   ACTION_OPEN,
   ACTION_COPY /* copy file. return 0 on success, -1 on error */
};

enum fsread_res

Enumerator:

FSREAD_FAILURE
FSREAD_SUCCESS_SCHED
FSREAD_SUCCESS_NOSCHED

Definition at line 721 of file file.c.

                {
   FSREAD_FAILURE,
   FSREAD_SUCCESS_SCHED,
   FSREAD_SUCCESS_NOSCHED,
};

enum wrap_fn

Enumerator:

WRAP_OPEN
WRAP_REWRITE

Definition at line 359 of file file.c.

{ WRAP_OPEN, WRAP_REWRITE };

---

Function Documentation

int __ast_format_register	(	const struct ast_format *	f,
		struct ast_module *	mod
	)

Register a new file format capability. Adds a format to Asterisk's format abilities.

Return values:

	0	on success
	-1	on failure

Definition at line 60 of file file.c.

References ast_calloc, ast_log(), AST_RWLIST_INSERT_HEAD, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, ast_format::buf_size, ast_format::exts, ast_format::list, LOG_WARNING, ast_format::module, and ast_format::name.

{
   struct ast_format *tmp;

   AST_RWLIST_WRLOCK(&formats);
   AST_RWLIST_TRAVERSE(&formats, tmp, list) {
      if (!strcasecmp(f->name, tmp->name)) {
         AST_RWLIST_UNLOCK(&formats);
         ast_log(LOG_WARNING, "Tried to register '%s' format, already registered\n", f->name);
         return -1;
      }
   }
   if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
      AST_RWLIST_UNLOCK(&formats);
      return -1;
   }
   *tmp = *f;
   tmp->module = mod;
   if (tmp->buf_size) {
      /*
       * Align buf_size properly, rounding up to the machine-specific
       * alignment for pointers.
       */
      struct _test_align { void *a, *b; } p;
      int align = (char *)&p.b - (char *)&p.a;
      tmp->buf_size = ((f->buf_size + align - 1) / align) * align;
   }
   
   memset(&tmp->list, 0, sizeof(tmp->list));

   AST_RWLIST_INSERT_HEAD(&formats, tmp, list);
   AST_RWLIST_UNLOCK(&formats);
   ast_verb(2, "Registered file format %s, extension(s) %s\n", f->name, f->exts);

   return 0;
}

static void __fini_formats

(

void

)

[static]

Definition at line 58 of file file.c.

{

static void __init_formats

(

void

)

[static]

Definition at line 58 of file file.c.

{

int ast_applystream	(	struct ast_channel *	chan,
		struct ast_filestream *	s
	)

Applys a open stream to a channel.

Parameters:

	chan	channel to work
	s	ast_filestream to apply

Return values:

	0	on success.
	-1	on failure.

Definition at line 844 of file file.c.

References ast_filestream::owner.

Referenced by ast_streamfile(), handle_getoption(), handle_recordfile(), handle_streamfile(), and speech_streamfile().

{
   s->owner = chan;
   return 0;
}

int ast_closestream

(

struct ast_filestream *

f

)

Closes a stream.

Parameters:

f

filestream to close Close a playback or recording stream

Return values:

	0	on success.
	-1	on failure.

Definition at line 887 of file file.c.

References ao2_ref(), AST_FORMAT_AUDIO_MASK, AST_SCHED_DEL, ast_settimeout(), ast_filestream::fmt, ast_format::format, ast_filestream::owner, ast_channel::sched, ast_channel::stream, ast_channel::streamid, ast_channel::vstream, and ast_channel::vstreamid.

Referenced by __ast_play_and_record(), ast_filehelper(), ast_hangup(), ast_moh_files_next(), ast_monitor_start(), ast_monitor_stop(), ast_readfile(), ast_stopstream(), ast_writefile(), dictate_exec(), filestream_destructor(), gen_closestream(), handle_cli_file_convert(), handle_recordfile(), local_ast_moh_stop(), mixmonitor_ds_close_fs(), moh_files_release(), record_exec(), and recordthread().

{
   /* This used to destroy the filestream, but it now just decrements a refcount.
    * We need to force the stream to quit queuing frames now, because we might
    * change the writeformat, which could result in a subsequent write error, if
    * the format is different. */

   /* Stop a running stream if there is one */
   if (f->owner) {
      if (f->fmt->format < AST_FORMAT_AUDIO_MASK) {
         f->owner->stream = NULL;
         AST_SCHED_DEL(f->owner->sched, f->owner->streamid);
         ast_settimeout(f->owner, 0, NULL, NULL);
      } else {
         f->owner->vstream = NULL;
         AST_SCHED_DEL(f->owner->sched, f->owner->vstreamid);
      }
   }

   ao2_ref(f, -1);
   return 0;
}

int ast_file_init

(

void

)

Provided by file.c

Definition at line 1378 of file file.c.

References ast_cli_register_multiple().

Referenced by main().

{
   ast_cli_register_multiple(cli_file, sizeof(cli_file) / sizeof(struct ast_cli_entry));
   return 0;
}

int ast_filecopy	(	const char *	oldname,
		const char *	newname,
		const char *	fmt
	)

Copies a file.

Parameters:

	oldname	name of the file you wish to copy (minus extension)
	newname	name you wish the file to be copied to (minus extension)
	fmt	the format of the file Copy a given file in a given format, or if fmt is NULL, then do so for all

Definition at line 938 of file file.c.

References ACTION_COPY, and ast_filehelper().

Referenced by copy_plain_file(), and vm_forwardoptions().

{
   return ast_filehelper(filename, filename2, fmt, ACTION_COPY);
}

int ast_filedelete	(	const char *	filename,
		const char *	fmt
	)

Deletes a file.

Parameters:

	filename	name of the file you wish to delete (minus the extension)
	fmt	of the file Delete a given file in a given format, or if fmt is NULL, then do so for all

Definition at line 928 of file file.c.

References ACTION_DELETE, and ast_filehelper().

Referenced by __ast_play_and_record(), announce_thread(), ast_monitor_start(), ast_monitor_stop(), conf_free(), conf_run(), handle_cli_file_convert(), leave_voicemail(), play_mailbox_owner(), play_record_review(), record_exec(), setup_privacy_args(), vm_delete(), and vm_forwardoptions().

{
   return ast_filehelper(filename, NULL, fmt, ACTION_DELETE);
}

int ast_fileexists	(	const char *	filename,
		const char *	fmt,
		const char *	preflang
	)

Checks for the existence of a given file.

Parameters:

	filename	name of the file you wish to check, minus the extension
	fmt	the format you wish to check (the extension)
	preflang	(the preferred language you wisht to find the file in) See if a given file exists in a given format. If fmt is NULL, any format is accepted.

Returns:

-1 if file does not exist, non-zero positive otherwise.

Definition at line 914 of file file.c.

References buf, and fileexists_core().

Referenced by announce_thread(), app_exec(), ast_moh_files_next(), ast_monitor_start(), ast_monitor_stop(), common_exec(), eivr_comm(), forward_message(), invent_message(), leave_voicemail(), minivm_delete_exec(), play_greeting(), play_mailbox_owner(), play_message_callerid(), record_exec(), retrydial_exec(), say_character_str_full(), say_digit_str_full(), say_phonetic_str_full(), setup_privacy_args(), vm_intro(), vm_newuser(), vm_options(), and vm_tempgreeting().

{
   char *buf;
   int buflen;

   if (preflang == NULL)
      preflang = "";
   buflen = strlen(preflang) + strlen(filename) + 4;  /* room for everything */
   buf = alloca(buflen);
   if (buf == NULL)
      return 0;
   return fileexists_core(filename, fmt, preflang, buf, buflen);
}

static int ast_filehelper	(	const char *	filename,
		const void *	arg2,
		const char *	fmt,
		const enum file_action	action
	)			[static]

perform various actions on a file. Second argument arg2 depends on the command: unused for EXISTS and DELETE destination file name (const char *) for COPY and RENAME struct ast_channel * for OPEN if fmt is NULL, OPEN will return the first matching entry, whereas other functions will run on all matching entries.

Definition at line 406 of file file.c.

References ACTION_COPY, ACTION_DELETE, ACTION_EXISTS, ACTION_OPEN, ACTION_RENAME, ast_closestream(), AST_FORMAT_AUDIO_MASK, ast_free, ast_log(), AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_strdupa, build_filename(), chan, copy(), errno, ext, ast_format::exts, exts_compare(), f, ast_filestream::filename, ast_filestream::fmt, ast_format::format, get_filestream(), ast_filestream::lasttimeout, ast_format::list, LOG_WARNING, open_wrapper(), s, ast_channel::stream, strsep(), ast_filestream::trans, ast_channel::vstream, and ast_channel::writeformat.

Referenced by ast_filecopy(), ast_filedelete(), ast_filerename(), ast_openstream_full(), ast_openvstream(), and fileexists_test().

{
   struct ast_format *f;
   int res = (action == ACTION_EXISTS) ? 0 : -1;

   AST_RWLIST_RDLOCK(&formats);
   /* Check for a specific format */
   AST_RWLIST_TRAVERSE(&formats, f, list) {
      char *stringp, *ext = NULL;

      if (fmt && !exts_compare(f->exts, fmt))
         continue;

      /* Look for a file matching the supported extensions.
       * The file must exist, and for OPEN, must match
       * one of the formats supported by the channel.
       */
      stringp = ast_strdupa(f->exts);  /* this is in the stack so does not need to be freed */
      while ( (ext = strsep(&stringp, "|")) ) {
         struct stat st;
         char *fn = build_filename(filename, ext);

         if (fn == NULL)
            continue;

         if ( stat(fn, &st) ) { /* file not existent */
            ast_free(fn);
            continue;
         }
         /* for 'OPEN' we need to be sure that the format matches
          * what the channel can process
          */
         if (action == ACTION_OPEN) {
            struct ast_channel *chan = (struct ast_channel *)arg2;
            FILE *bfile;
            struct ast_filestream *s;

            if ( !(chan->writeformat & f->format) &&
                 !(f->format & AST_FORMAT_AUDIO_MASK && fmt)) {
               ast_free(fn);
               continue;   /* not a supported format */
            }
            if ( (bfile = fopen(fn, "r")) == NULL) {
               ast_free(fn);
               continue;   /* cannot open file */
            }
            s = get_filestream(f, bfile);
            if (!s) {
               fclose(bfile);
               ast_free(fn);  /* cannot allocate descriptor */
               continue;
            }
            if (open_wrapper(s)) {
               ast_free(fn);
               ast_closestream(s);
               continue;   /* cannot run open on file */
            }
            /* ok this is good for OPEN */
            res = 1; /* found */
            s->lasttimeout = -1;
            s->fmt = f;
            s->trans = NULL;
            s->filename = NULL;
            if (s->fmt->format & AST_FORMAT_AUDIO_MASK) {
               if (chan->stream)
                  ast_closestream(chan->stream);
               chan->stream = s;
            } else {
               if (chan->vstream)
                  ast_closestream(chan->vstream);
               chan->vstream = s;
            }
            ast_free(fn);
            break;
         }
         switch (action) {
         case ACTION_OPEN:
            break;   /* will never get here */

         case ACTION_EXISTS:  /* return the matching format */
            res |= f->format;
            break;

         case ACTION_DELETE:
            if ( (res = unlink(fn)) )
               ast_log(LOG_WARNING, "unlink(%s) failed: %s\n", fn, strerror(errno));
            break;

         case ACTION_RENAME:
         case ACTION_COPY: {
            char *nfn = build_filename((const char *)arg2, ext);
            if (!nfn)
               ast_log(LOG_WARNING, "Out of memory\n");
            else {
               res = action == ACTION_COPY ? copy(fn, nfn) : rename(fn, nfn);
               if (res)
                  ast_log(LOG_WARNING, "%s(%s,%s) failed: %s\n",
                     action == ACTION_COPY ? "copy" : "rename",
                      fn, nfn, strerror(errno));
               ast_free(nfn);
            }
             }
            break;

         default:
            ast_log(LOG_WARNING, "Unknown helper %d\n", action);
         }
         ast_free(fn);
      }
   }
   AST_RWLIST_UNLOCK(&formats);
   return res;
}

int ast_filerename	(	const char *	oldname,
		const char *	newname,
		const char *	fmt
	)

Renames a file.

Parameters:

	oldname	the name of the file you wish to act upon (minus the extension)
	newname	the name you wish to rename the file to (minus the extension)
	fmt	the format of the file Rename a given file in a given format, or if fmt is NULL, then do so for all

Returns:

-1 on failure

Definition at line 933 of file file.c.

References ACTION_RENAME, and ast_filehelper().

Referenced by __ast_play_and_record(), ast_monitor_stop(), leave_voicemail(), play_record_review(), and rename_file().

{
   return ast_filehelper(filename, filename2, fmt, ACTION_RENAME);
}

int ast_format_unregister

(

const char *

name

)

Unregisters a file format.

Parameters:

name

the name of the format you wish to unregister Unregisters a format based on the name of the format.

Return values:

	0	on success
	-1	on failure to unregister

Definition at line 97 of file file.c.

References ast_free, ast_log(), AST_RWLIST_REMOVE_CURRENT, AST_RWLIST_TRAVERSE_SAFE_BEGIN, AST_RWLIST_TRAVERSE_SAFE_END, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_verb, ast_format::list, LOG_WARNING, and ast_format::name.

Referenced by unload_module().

{
   struct ast_format *tmp;
   int res = -1;

   AST_RWLIST_WRLOCK(&formats);
   AST_RWLIST_TRAVERSE_SAFE_BEGIN(&formats, tmp, list) {
      if (!strcasecmp(name, tmp->name)) {
         AST_RWLIST_REMOVE_CURRENT(list);
         ast_free(tmp);
         res = 0;
      }
   }
   AST_RWLIST_TRAVERSE_SAFE_END;
   AST_RWLIST_UNLOCK(&formats);

   if (!res)
      ast_verb(2, "Unregistered format %s\n", name);
   else
      ast_log(LOG_WARNING, "Tried to unregister format %s, already unregistered\n", name);

   return res;
}

static int ast_fsread_audio

(

const void *

data

)

[static]

Definition at line 784 of file file.c.

References ast_readaudio_callback(), and FSREAD_SUCCESS_SCHED.

Referenced by ast_readaudio_callback().

{
   struct ast_filestream *fs = (struct ast_filestream *)data;
   enum fsread_res res;

   res = ast_readaudio_callback(fs);

   if (res == FSREAD_SUCCESS_SCHED)
      return 1;
   
   return 0;
}

static int ast_fsread_video

(

const void *

data

)

[static]

Definition at line 831 of file file.c.

References ast_readvideo_callback(), and FSREAD_SUCCESS_SCHED.

Referenced by ast_readvideo_callback().

{
   struct ast_filestream *fs = (struct ast_filestream *)data;
   enum fsread_res res;

   res = ast_readvideo_callback(fs);

   if (res == FSREAD_SUCCESS_SCHED)
      return 1;
   
   return 0;
}

struct ast_filestream* ast_openstream	(	struct ast_channel *	chan,
		const char *	filename,
		const char *	preflang
	)			[read]

Opens stream for use in seeking, playing.

Parameters:

	chan	channel to work with
	filename	to use
	preflang	prefered language to use

Return values:

	a	ast_filestream pointer if it opens the file.
	NULL	on error.

Definition at line 613 of file file.c.

References ast_openstream_full().

Referenced by ast_streamfile(), dictate_exec(), handle_getoption(), handle_streamfile(), and speech_streamfile().

{
   return ast_openstream_full(chan, filename, preflang, 0);
}

struct ast_filestream* ast_openstream_full	(	struct ast_channel *	chan,
		const char *	filename,
		const char *	preflang,
		int	asis
	)			[read]

Opens stream for use in seeking, playing.

Parameters:

	chan	channel to work with
	filename	to use
	preflang	prefered language to use
	asis	if set, don't clear generators

Return values:

	a	ast_filestream pointer if it opens the file.
	NULL	on error.

Definition at line 618 of file file.c.

References ACTION_OPEN, ast_deactivate_generator(), ast_filehelper(), AST_FORMAT_AUDIO_MASK, ast_log(), ast_set_write_format(), ast_stopstream(), buf, fileexists_core(), ast_channel::generator, LOG_WARNING, ast_channel::oldwriteformat, ast_channel::stream, and ast_channel::writeformat.

Referenced by ast_moh_files_next(), ast_openstream(), and gen_nextfile().

{
   /* 
    * Use fileexists_core() to find a file in a compatible
    * language and format, set up a suitable translator,
    * and open the stream.
    */
   int fmts, res, buflen;
   char *buf;

   if (!asis) {
      /* do this first, otherwise we detect the wrong writeformat */
      ast_stopstream(chan);
      if (chan->generator)
         ast_deactivate_generator(chan);
   }
   if (preflang == NULL)
      preflang = "";
   buflen = strlen(preflang) + strlen(filename) + 4;
   buf = alloca(buflen);
   if (buf == NULL)
      return NULL;
   fmts = fileexists_core(filename, NULL, preflang, buf, buflen);
   if (fmts > 0)
      fmts &= AST_FORMAT_AUDIO_MASK;
   if (fmts < 1) {
      ast_log(LOG_WARNING, "File %s does not exist in any format\n", filename);
      return NULL;
   }
   chan->oldwriteformat = chan->writeformat;
   /* Set the channel to a format we can work with */
   res = ast_set_write_format(chan, fmts);
   res = ast_filehelper(buf, chan, NULL, ACTION_OPEN);
   if (res >= 0)
      return chan->stream;
   return NULL;
}

struct ast_filestream* ast_openvstream	(	struct ast_channel *	chan,
		const char *	filename,
		const char *	preflang
	)			[read]

Opens stream for use in seeking, playing.

Parameters:

	chan	channel to work with
	filename	to use
	preflang	prefered language to use

Return values:

	a	ast_filestream pointer if it opens the file.
	NULL	on error.

Definition at line 656 of file file.c.

References ACTION_OPEN, ast_filehelper(), AST_FORMAT_AUDIO_MASK, AST_FORMAT_VIDEO_MASK, ast_getformatname(), ast_log(), buf, fileexists_core(), ast_filestream::fmt, format, LOG_WARNING, ast_channel::nativeformats, and ast_channel::vstream.

Referenced by ast_streamfile(), handle_getoption(), and handle_streamfile().

{
   /* As above, but for video. But here we don't have translators
    * so we must enforce a format.
    */
   unsigned int format;
   char *buf;
   int buflen;

   if (preflang == NULL)
      preflang = "";
   buflen = strlen(preflang) + strlen(filename) + 4;
   buf = alloca(buflen);
   if (buf == NULL)
      return NULL;

   for (format = AST_FORMAT_AUDIO_MASK + 1; format <= AST_FORMAT_VIDEO_MASK; format = format << 1) {
      int fd;
      const char *fmt;

      if (!(chan->nativeformats & format))
         continue;
      fmt = ast_getformatname(format);
      if ( fileexists_core(filename, fmt, preflang, buf, buflen) < 1)   /* no valid format */
         continue;
      fd = ast_filehelper(buf, chan, fmt, ACTION_OPEN);
      if (fd >= 0)
         return chan->vstream;
      ast_log(LOG_WARNING, "File %s has video but couldn't be opened\n", filename);
   }
   return NULL;
}

int ast_playstream

(

struct ast_filestream *

s

)

Play a open stream on a channel.

Parameters:

s

filestream to play

Return values:

	0	on success.
	-1	on failure.

Definition at line 850 of file file.c.

References AST_FORMAT_AUDIO_MASK, ast_readaudio_callback(), ast_readvideo_callback(), ast_filestream::fmt, ast_format::format, and FSREAD_FAILURE.

Referenced by ast_streamfile(), handle_getoption(), handle_streamfile(), and speech_streamfile().

{
   enum fsread_res res;

   if (s->fmt->format & AST_FORMAT_AUDIO_MASK)
      res = ast_readaudio_callback(s);
   else
      res = ast_readvideo_callback(s);

   return (res == FSREAD_FAILURE) ? -1 : 0;
}

static enum fsread_res ast_readaudio_callback

(

struct ast_filestream *

s

)

[static]

Definition at line 729 of file file.c.

References ast_format_rate(), ast_frfree, ast_fsread_audio(), ast_log(), ast_sched_add(), ast_settimeout(), ast_write(), ast_filestream::fmt, ast_format::format, FSREAD_FAILURE, FSREAD_SUCCESS_NOSCHED, FSREAD_SUCCESS_SCHED, ast_filestream::lasttimeout, LOG_WARNING, ast_channel::name, ast_filestream::orig_chan_name, ast_filestream::owner, read_frame(), ast_channel::sched, ast_channel::streamid, and ast_channel::timingfd.

Referenced by ast_fsread_audio(), and ast_playstream().

{
   int whennext = 0;

   while (!whennext) {
      struct ast_frame *fr;

      if (s->orig_chan_name && strcasecmp(s->owner->name, s->orig_chan_name)) {
         goto return_failure;
      }

      fr = read_frame(s, &whennext);

      if (!fr /* stream complete */ || ast_write(s->owner, fr) /* error writing */) {
         if (fr) {
            ast_log(LOG_WARNING, "Failed to write frame\n");
            ast_frfree(fr);
         }
         goto return_failure;
      } 

      if (fr) {
         ast_frfree(fr);
      }
   }

   if (whennext != s->lasttimeout) {
#ifdef HAVE_DAHDI
      if (s->owner->timingfd > -1) {
         int dahdi_timer_samples = whennext;
         int rate;
         /* whennext is in samples, but DAHDI timers operate in 8 kHz samples. */
         if ((rate = ast_format_rate(s->fmt->format)) != 8000) {
            float factor;
            factor = ((float) rate) / ((float) 8000.0); 
            dahdi_timer_samples = (int) ( ((float) dahdi_timer_samples) / factor );
         }
         ast_settimeout(s->owner, dahdi_timer_samples, ast_fsread_audio, s);
      } else
#endif      
         s->owner->streamid = ast_sched_add(s->owner->sched, 
            whennext / (ast_format_rate(s->fmt->format) / 1000), ast_fsread_audio, s);
      s->lasttimeout = whennext;
      return FSREAD_SUCCESS_NOSCHED;
   }
   return FSREAD_SUCCESS_SCHED;

return_failure:
   s->owner->streamid = -1;
#ifdef HAVE_DAHDI
   ast_settimeout(s->owner, 0, NULL, NULL);
#endif         
   return FSREAD_FAILURE;
}

struct ast_filestream* ast_readfile	(	const char *	filename,
		const char *	type,
		const char *	comment,
		int	flags,
		int	check,
		mode_t	mode
	)			[read]

Starts reading from a file.

Parameters:

	filename	the name of the file to read from
	type	format of file you wish to read from
	comment	comment to go with
	flags	file flags
	check	(unimplemented, hence negligible)
	mode	Open mode Open an incoming file stream. flags are flags for the open() command, and if check is non-zero, then it will not read a file if there are any files that start with that name and have an extension Please note, this is a blocking function. Program execution will not return until ast_waitstream completes it's execution.

Return values:

	a	struct ast_filestream on success.
	NULL	on failure.

Definition at line 974 of file file.c.

References ast_closestream(), ast_free, ast_log(), AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_strdup, build_filename(), errno, ast_format::exts, exts_compare(), f, ast_filestream::filename, ast_filestream::flags, ast_filestream::fmt, get_filestream(), LOG_WARNING, ast_filestream::mode, open_wrapper(), ast_filestream::trans, and ast_filestream::vfs.

Referenced by __ast_play_and_record(), and handle_cli_file_convert().

{
   FILE *bfile;
   struct ast_format *f;
   struct ast_filestream *fs = NULL;
   char *fn;
   int format_found = 0;   

   AST_RWLIST_RDLOCK(&formats);

   AST_RWLIST_TRAVERSE(&formats, f, list) {
      fs = NULL;
      if (!exts_compare(f->exts, type))
         continue;
      else 
         format_found = 1;

      fn = build_filename(filename, type);
      errno = 0;
      bfile = fopen(fn, "r");

      if (!bfile || (fs = get_filestream(f, bfile)) == NULL || open_wrapper(fs) ) {
         ast_log(LOG_WARNING, "Unable to open %s\n", fn);
         if (fs) {
            ast_closestream(fs);
         }
         fs = NULL;
         bfile = NULL;
         ast_free(fn);
         break;            
      }
      /* found it */
      fs->trans = NULL;
      fs->fmt = f;
      fs->flags = flags;
      fs->mode = mode;
      fs->filename = ast_strdup(filename);
      fs->vfs = NULL;
      break;
   }

   AST_RWLIST_UNLOCK(&formats);
   if (!format_found)
      ast_log(LOG_WARNING, "No such format '%s'\n", type);

   return fs;
}

struct ast_frame* ast_readframe

(

struct ast_filestream *

s

)

[read]

Read a frame from a filestream.

Parameters:

s

ast_filestream to act on

Returns:

a frame.

Return values:

NULL

if read failed.

Definition at line 714 of file file.c.

References read_frame().

Referenced by __ast_play_and_record(), dictate_exec(), gen_readframe(), handle_cli_file_convert(), and moh_files_readframe().

{
   int whennext = 0;

   return read_frame(s, &whennext);
}

static enum fsread_res ast_readvideo_callback

(

struct ast_filestream *

s

)

[static]

Definition at line 799 of file file.c.

References ast_format_rate(), ast_frfree, ast_fsread_video(), ast_log(), ast_sched_add(), ast_write(), ast_filestream::fmt, ast_format::format, FSREAD_FAILURE, FSREAD_SUCCESS_NOSCHED, FSREAD_SUCCESS_SCHED, ast_filestream::lasttimeout, LOG_WARNING, ast_filestream::owner, read_frame(), ast_channel::sched, and ast_channel::vstreamid.

Referenced by ast_fsread_video(), and ast_playstream().

{
   int whennext = 0;

   while (!whennext) {
      struct ast_frame *fr = read_frame(s, &whennext);

      if (!fr /* stream complete */ || ast_write(s->owner, fr) /* error writing */) {
         if (fr) {
            ast_log(LOG_WARNING, "Failed to write frame\n");
            ast_frfree(fr);
         }
         s->owner->vstreamid = -1;
         return FSREAD_FAILURE;
      }

      if (fr) {
         ast_frfree(fr);
      }
   }

   if (whennext != s->lasttimeout) {
      s->owner->vstreamid = ast_sched_add(s->owner->sched, 
         whennext / (ast_format_rate(s->fmt->format) / 1000), 
         ast_fsread_video, s);
      s->lasttimeout = whennext;
      return FSREAD_SUCCESS_NOSCHED;
   }

   return FSREAD_SUCCESS_SCHED;
}

int ast_seekstream	(	struct ast_filestream *	fs,
		off_t	sample_offset,
		int	whence
	)

Seeks into stream.

Parameters:

	fs	ast_filestream to perform seek on
	sample_offset	numbers of samples to seek
	whence	SEEK_SET, SEEK_CUR, SEEK_END

Return values:

	0	on success.
	-1	on failure.

Definition at line 862 of file file.c.

References ast_filestream::fmt, and ast_format::seek.

Referenced by __ast_read(), ast_control_streamfile(), ast_moh_files_next(), ast_stream_fastforward(), ast_stream_rewind(), ast_write(), dictate_exec(), handle_getoption(), handle_recordfile(), handle_streamfile(), and speech_streamfile().

{
   return fs->fmt->seek(fs, sample_offset, whence);
}

int ast_stopstream

(

struct ast_channel *

c

)

Stops a stream.

Parameters:

c

The channel you wish to stop playback on

Stop playback of a stream

Return values:

0

always

Note:

The channel does not need to be locked before calling this function.

Definition at line 121 of file file.c.

References ast_channel_lock, ast_channel_unlock, ast_closestream(), ast_log(), ast_set_write_format(), LOG_WARNING, ast_channel::oldwriteformat, ast_channel::stream, and ast_channel::vstream.

Referenced by _ast_adsi_transmit_message_full(), ast_control_streamfile(), ast_openstream_full(), ast_play_and_wait(), ast_readstring_full(), ast_say_enumeration_full_da(), ast_say_enumeration_full_de(), ast_say_enumeration_full_en(), ast_say_enumeration_full_he(), ast_say_number_full_cs(), ast_say_number_full_da(), ast_say_number_full_de(), ast_say_number_full_en(), ast_say_number_full_en_GB(), ast_say_number_full_es(), ast_say_number_full_fr(), ast_say_number_full_gr(), ast_say_number_full_he(), ast_say_number_full_hu(), ast_say_number_full_it(), ast_say_number_full_ka(), ast_say_number_full_nl(), ast_say_number_full_no(), ast_say_number_full_pt(), ast_say_number_full_ru(), ast_say_number_full_se(), ast_say_number_full_th(), ast_say_number_full_zh(), background_detect_exec(), builtin_blindtransfer(), conf_exec(), conf_run(), directory_exec(), handle_getoption(), handle_speechrecognize(), handle_streamfile(), ices_exec(), ivr_dispatch(), leave_voicemail(), minivm_greet_exec(), mp3_exec(), NBScat_exec(), parkandannounce_exec(), pbx_builtin_background(), pl_odtworz_plik(), play_file(), play_mailbox_owner(), playback_exec(), queue_exec(), read_exec(), readexten_exec(), record_exec(), recordthread(), rpt_tele_thread(), s_streamwait3(), say_character_str_full(), say_digit_str_full(), say_phonetic_str_full(), saycharstr(), saydigits(), sayfile(), saynum(), select_item_seq(), send_morse(), send_tone_telemetry(), send_waveform_to_channel(), speech_background(), vm_authenticate(), vm_execmain(), wait_for_winner(), waitstream_core(), and zapateller_exec().

{
   ast_channel_lock(tmp);

   /* Stop a running stream if there is one */
   if (tmp->stream) {
      ast_closestream(tmp->stream);
      tmp->stream = NULL;
      if (tmp->oldwriteformat && ast_set_write_format(tmp, tmp->oldwriteformat))
         ast_log(LOG_WARNING, "Unable to restore format back to %d\n", tmp->oldwriteformat);
   }
   /* Stop the video stream too */
   if (tmp->vstream != NULL) {
      ast_closestream(tmp->vstream);
      tmp->vstream = NULL;
   }

   ast_channel_unlock(tmp);

   return 0;
}

int ast_stream_and_wait	(	struct ast_channel *	chan,
		const char *	file,
		const char *	digits
	)

stream file until digit If the file name is non-empty, try to play it.

Note:

If digits == "" then we can simply check for non-zero.

Returns:

0 if success.

Return values:

	-1	if error.
	digit	if interrupted by a digit.

Definition at line 1326 of file file.c.

References ast_streamfile(), ast_strlen_zero(), ast_waitstream(), and ast_channel::language.

Referenced by __ast_play_and_record(), app_exec(), ast_record_review(), bridge_playfile(), builtin_atxfer(), builtin_automixmonitor(), builtin_automonitor(), builtin_blindtransfer(), directory_exec(), forward_message(), invent_message(), ivr_dispatch(), leave_voicemail(), masq_park_call(), park_exec(), play_mailbox_owner(), play_message_callerid(), play_record_review(), select_item_seq(), and wait_file2().

{
   int res = 0;
   if (!ast_strlen_zero(file)) {
      res = ast_streamfile(chan, file, chan->language);
      if (!res) {
         res = ast_waitstream(chan, digits);
      }
   }
   return res;
} 

int ast_stream_fastforward	(	struct ast_filestream *	fs,
		off_t	ms
	)

Fast forward stream ms.

Parameters:

	fs	filestream to act on
	ms	milliseconds to move

Return values:

	0	on success.
	-1	on failure.

Definition at line 877 of file file.c.

References ast_seekstream(), and DEFAULT_SAMPLES_PER_MS.

Referenced by waitstream_core().

{
   return ast_seekstream(fs, ms * DEFAULT_SAMPLES_PER_MS, SEEK_CUR);
}

int ast_stream_rewind	(	struct ast_filestream *	fs,
		off_t	ms
	)

Rewind stream ms.

Parameters:

	fs	filestream to act on
	ms	milliseconds to move

Return values:

	0	on success.
	-1	on failure.

Definition at line 882 of file file.c.

References ast_seekstream(), and DEFAULT_SAMPLES_PER_MS.

Referenced by __ast_play_and_record(), handle_recordfile(), record_exec(), and waitstream_core().

{
   return ast_seekstream(fs, -ms * DEFAULT_SAMPLES_PER_MS, SEEK_CUR);
}

int ast_streamfile	(	struct ast_channel *	c,
		const char *	filename,
		const char *	preflang
	)

Streams a file.

Parameters:

	c	channel to stream the file to
	filename	the name of the file you wish to stream, minus the extension
	preflang	the preferred language you wish to have the file streamed to you in Prepares a channel for the streaming of a file. To start the stream, afterward do a ast_waitstream() on the channel Also, it will stop any existing streams on the channel.

Return values:

	0	on success.
	-1	on failure.

Definition at line 943 of file file.c.

References ast_applystream(), ast_debug, AST_FLAG_MASQ_NOSTREAM, ast_getformatname(), ast_getformatname_multiple(), ast_log(), ast_openstream(), ast_openvstream(), ast_playstream(), ast_strdup, ast_test_flag, ast_verb, errno, ast_filestream::fmt, ast_format::format, LOG_WARNING, ast_channel::name, ast_channel::nativeformats, ast_filestream::orig_chan_name, ast_filestream::vfs, and ast_channel::writeformat.

Referenced by action_bridge(), agent_call(), announce_thread(), app_exec(), ast_app_getdata(), ast_app_getdata_full(), ast_control_streamfile(), ast_play_and_wait(), ast_say_date_da(), ast_say_date_de(), ast_say_date_en(), ast_say_date_fr(), ast_say_date_gr(), ast_say_date_he(), ast_say_date_hu(), ast_say_date_ka(), ast_say_date_nl(), ast_say_date_th(), ast_say_date_with_format_gr(), ast_say_datetime_en(), ast_say_datetime_fr(), ast_say_datetime_from_now_en(), ast_say_datetime_from_now_fr(), ast_say_datetime_from_now_he(), ast_say_datetime_from_now_ka(), ast_say_datetime_gr(), ast_say_datetime_he(), ast_say_datetime_nl(), ast_say_datetime_pt(), ast_say_datetime_th(), ast_say_datetime_zh(), ast_say_enumeration_full_da(), ast_say_enumeration_full_de(), ast_say_enumeration_full_en(), ast_say_enumeration_full_he(), ast_say_number_full_cs(), ast_say_number_full_da(), ast_say_number_full_de(), ast_say_number_full_en(), ast_say_number_full_en_GB(), ast_say_number_full_es(), ast_say_number_full_fr(), ast_say_number_full_gr(), ast_say_number_full_he(), ast_say_number_full_hu(), ast_say_number_full_it(), ast_say_number_full_ka(), ast_say_number_full_nl(), ast_say_number_full_no(), ast_say_number_full_pt(), ast_say_number_full_ru(), ast_say_number_full_se(), ast_say_number_full_th(), ast_say_number_full_zh(), ast_say_time_de(), ast_say_time_en(), ast_say_time_fr(), ast_say_time_gr(), ast_say_time_hu(), ast_say_time_ka(), ast_say_time_nl(), ast_say_time_zh(), ast_stream_and_wait(), auth_exec(), background_detect_exec(), bridge_exec(), check_availability(), check_beep(), common_exec(), conf_exec(), conf_run(), dial_exec_full(), do_directory(), find_conf_realtime(), forward_message(), gr_say_number_female(), handle_recordfile(), invent_message(), leave_voicemail(), login_exec(), minivm_greet_exec(), page_exec(), park_exec(), parkandannounce_exec(), pbx_builtin_background(), pl_odtworz_plik(), play_and_wait(), play_file(), play_greeting(), play_record_review(), playback_exec(), privacy_exec(), readexten_exec(), record_exec(), retrydial_exec(), rpt_tele_thread(), s_streamwait3(), say_character_str_full(), say_digit_str_full(), say_phonetic_str_full(), sayfile(), select_item_menu(), setup_privacy_args(), ss_thread(), vm_authenticate(), wait_file(), and wait_for_winner().

{
   struct ast_filestream *fs;
   struct ast_filestream *vfs=NULL;
   char fmt[256];

   fs = ast_openstream(chan, filename, preflang);
   if (fs)
      vfs = ast_openvstream(chan, filename, preflang);
   if (vfs) {
      ast_debug(1, "Ooh, found a video stream, too, format %s\n", ast_getformatname(vfs->fmt->format));
   }
   if (fs){
      int res;
      if (ast_test_flag(chan, AST_FLAG_MASQ_NOSTREAM))
         fs->orig_chan_name = ast_strdup(chan->name);
      if (ast_applystream(chan, fs))
         return -1;
      if (vfs && ast_applystream(chan, vfs))
         return -1;
      res = ast_playstream(fs);
      if (!res && vfs)
         res = ast_playstream(vfs);
      ast_verb(3, "<%s> Playing '%s.%s' (language '%s')\n", chan->name, filename, ast_getformatname(chan->writeformat), preflang ? preflang : "default");

      return res;
   }
   ast_log(LOG_WARNING, "Unable to open %s (format %s): %s\n", filename, ast_getformatname_multiple(fmt, sizeof(fmt), chan->nativeformats), strerror(errno));
   return -1;
}

off_t ast_tellstream

(

struct ast_filestream *

fs

)

Tell where we are in a stream.

Parameters:

fs

fs to act on

Returns:

a long as a sample offset into stream

Definition at line 872 of file file.c.

References ast_filestream::fmt, and ast_format::tell.

Referenced by __ast_play_and_record(), ast_control_streamfile(), handle_getoption(), handle_recordfile(), handle_speechrecognize(), and handle_streamfile().

{
   return fs->fmt->tell(fs);
}

int ast_truncstream

(

struct ast_filestream *

fs

)

Trunc stream at current location.

Parameters:

fs

filestream to act on

Return values:

	0	on success.
	-1	on failure.

Definition at line 867 of file file.c.

References ast_filestream::fmt, and ast_format::trunc.

Referenced by __ast_play_and_record(), handle_recordfile(), and record_exec().

{
   return fs->fmt->trunc(fs);
}

int ast_waitstream	(	struct ast_channel *	c,
		const char *	breakon
	)

Waits for a stream to stop or digit to be pressed.

Parameters:

	c	channel to waitstream on
	breakon	string of DTMF digits to break upon Begins playback of a stream... Wait for a stream to stop or for any one of a given digit to arrive,

Return values:

	0	if the stream finishes
	the	character if it was interrupted,
	-1	on error

Definition at line 1299 of file file.c.

References waitstream_core().

Referenced by action_bridge(), agent_call(), announce_thread(), app_exec(), ast_play_and_wait(), ast_say_date_da(), ast_say_date_de(), ast_say_date_en(), ast_say_date_fr(), ast_say_date_gr(), ast_say_date_he(), ast_say_date_hu(), ast_say_date_ka(), ast_say_date_nl(), ast_say_date_th(), ast_say_date_with_format_gr(), ast_say_datetime_en(), ast_say_datetime_fr(), ast_say_datetime_from_now_en(), ast_say_datetime_from_now_fr(), ast_say_datetime_from_now_he(), ast_say_datetime_from_now_ka(), ast_say_datetime_gr(), ast_say_datetime_he(), ast_say_datetime_nl(), ast_say_datetime_pt(), ast_say_datetime_th(), ast_say_datetime_zh(), ast_say_enumeration_full_da(), ast_say_enumeration_full_de(), ast_say_enumeration_full_en(), ast_say_enumeration_full_he(), ast_say_number_full_cs(), ast_say_number_full_da(), ast_say_number_full_de(), ast_say_number_full_en(), ast_say_number_full_en_GB(), ast_say_number_full_es(), ast_say_number_full_fr(), ast_say_number_full_gr(), ast_say_number_full_he(), ast_say_number_full_hu(), ast_say_number_full_it(), ast_say_number_full_ka(), ast_say_number_full_nl(), ast_say_number_full_no(), ast_say_number_full_pt(), ast_say_number_full_ru(), ast_say_number_full_se(), ast_say_number_full_th(), ast_say_number_full_zh(), ast_say_time_de(), ast_say_time_en(), ast_say_time_gr(), ast_say_time_he(), ast_say_time_hu(), ast_say_time_ka(), ast_say_time_nl(), ast_say_time_zh(), ast_stream_and_wait(), auth_exec(), bridge_exec(), check_availability(), check_beep(), common_exec(), conf_exec(), conf_run(), dial_exec_full(), directory_exec(), find_conf_realtime(), gr_say_number_female(), handle_recordfile(), invent_message(), leave_voicemail(), login_exec(), minivm_greet_exec(), page_exec(), park_exec(), parkandannounce_exec(), pbx_builtin_background(), pl_odtworz_plik(), play_and_wait(), play_file(), play_greeting(), play_record_review(), playback_exec(), privacy_exec(), record_exec(), retrydial_exec(), rpt_tele_thread(), s_streamwait3(), say_character_str_full(), say_digit_str_full(), say_phonetic_str_full(), saycharstr(), saydigits(), sayfile(), saynum(), select_item_menu(), send_morse(), send_tone_telemetry(), setup_privacy_args(), ss_thread(), vm_authenticate(), and wait_file().

{
   return waitstream_core(c, breakon, NULL, NULL, 0, -1, -1, NULL);
}

int ast_waitstream_exten	(	struct ast_channel *	c,
		const char *	context
	)

Waits for a stream to stop or digit matching a valid one digit exten to be pressed.

Parameters:

	c	channel to waitstream on
	context	string of context to match digits to break upon Begins playback of a stream... Wait for a stream to stop or for any one of a valid extension digit to arrive,

Return values:

	0	if the stream finishes.
	the	character if it was interrupted.
	-1	on error.

Definition at line 1310 of file file.c.

References ast_channel::context, and waitstream_core().

Referenced by pbx_builtin_background().

{
   /* Waitstream, with return in the case of a valid 1 digit extension */
   /* in the current or specified context being pressed */

   if (!context)
      context = c->context;
   return waitstream_core(c, NULL, NULL, NULL, 0,
      -1, -1, context);
}

int ast_waitstream_fr	(	struct ast_channel *	c,
		const char *	breakon,
		const char *	forward,
		const char *	rewind,
		int	ms
	)

Same as waitstream but allows stream to be forwarded or rewound.

Parameters:

	c	channel to waitstream on
	breakon	string of DTMF digits to break upon
	forward	DTMF digit to fast forward upon
	rewind	DTMF digit to rewind upon
	ms	How many miliseconds to skip forward/back Begins playback of a stream... Wait for a stream to stop or for any one of a given digit to arrive,

Return values:

	0	if the stream finishes.
	the	character if it was interrupted.
	-1	on error.

Definition at line 1293 of file file.c.

References waitstream_core().

Referenced by ast_control_streamfile().

{
   return waitstream_core(c, breakon, forward, rewind, ms,
      -1 /* no audiofd */, -1 /* no cmdfd */, NULL /* no context */);
}

int ast_waitstream_full	(	struct ast_channel *	c,
		const char *	breakon,
		int	audiofd,
		int	monfd
	)

Same as waitstream, but with audio output to fd and monitored fd checking.

Returns:

1 if monfd is ready for reading

Definition at line 1304 of file file.c.

References waitstream_core().

Referenced by ast_readstring_full(), ast_say_enumeration_full_da(), ast_say_enumeration_full_de(), ast_say_enumeration_full_en(), ast_say_enumeration_full_he(), ast_say_number_full_cs(), ast_say_number_full_da(), ast_say_number_full_de(), ast_say_number_full_en(), ast_say_number_full_en_GB(), ast_say_number_full_es(), ast_say_number_full_fr(), ast_say_number_full_gr(), ast_say_number_full_he(), ast_say_number_full_hu(), ast_say_number_full_it(), ast_say_number_full_ka(), ast_say_number_full_nl(), ast_say_number_full_no(), ast_say_number_full_pt(), ast_say_number_full_ru(), ast_say_number_full_se(), ast_say_number_full_th(), ast_say_number_full_zh(), handle_getoption(), handle_streamfile(), pl_odtworz_plik(), s_streamwait3(), say_character_str_full(), say_digit_str_full(), and say_phonetic_str_full().

{
   return waitstream_core(c, breakon, NULL, NULL, 0,
      audiofd, cmdfd, NULL /* no context */);
}

struct ast_filestream* ast_writefile	(	const char *	filename,
		const char *	type,
		const char *	comment,
		int	flags,
		int	check,
		mode_t	mode
	)			[read]

Starts writing a file.

Parameters:

	filename	the name of the file to write to
	type	format of file you wish to write out to
	comment	comment to go with
	flags	output file flags
	check	(unimplemented, hence negligible)
	mode	Open mode Create an outgoing file stream. oflags are flags for the open() command, and if check is non-zero, then it will not write a file if there are any files that start with that name and have an extension Please note, this is a blocking function. Program execution will not return until ast_waitstream completes it's execution.

Return values:

	a	struct ast_filestream on success.
	NULL	on failure.

Definition at line 1022 of file file.c.

References ast_closestream(), ast_free, ast_log(), ast_opt_cache_record_files, AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, ast_strdup, ast_strdupa, buf, build_filename(), errno, ast_format::exts, exts_compare(), f, ast_filestream::filename, ast_filestream::flags, ast_filestream::fmt, get_filestream(), LOG_WARNING, ast_filestream::mode, ast_filestream::realfilename, record_cache_dir, rewrite_wrapper(), ast_format::seek, ast_filestream::trans, and ast_filestream::vfs.

Referenced by __ast_play_and_record(), ast_monitor_start(), ast_writestream(), dictate_exec(), handle_cli_file_convert(), handle_recordfile(), mixmonitor_thread(), record_exec(), and recordthread().

{
   int fd, myflags = 0;
   /* compiler claims this variable can be used before initialization... */
   FILE *bfile = NULL;
   struct ast_format *f;
   struct ast_filestream *fs = NULL;
   char *buf = NULL;
   size_t size = 0;
   int format_found = 0;

   AST_RWLIST_RDLOCK(&formats);

   /* set the O_TRUNC flag if and only if there is no O_APPEND specified */
   /* We really can't use O_APPEND as it will break WAV header updates */
   if (flags & O_APPEND) { 
      flags &= ~O_APPEND;
   } else {
      myflags = O_TRUNC;
   }
   
   myflags |= O_WRONLY | O_CREAT;

   /* XXX need to fix this - we should just do the fopen,
    * not open followed by fdopen()
    */
   AST_RWLIST_TRAVERSE(&formats, f, list) {
      char *fn, *orig_fn = NULL;
      if (fs)
         break;

      if (!exts_compare(f->exts, type))
         continue;
      else
         format_found = 1;

      fn = build_filename(filename, type);
      fd = open(fn, flags | myflags, mode);
      if (fd > -1) {
         /* fdopen() the resulting file stream */
         bfile = fdopen(fd, ((flags | myflags) & O_RDWR) ? "w+" : "w");
         if (!bfile) {
            ast_log(LOG_WARNING, "Whoa, fdopen failed: %s!\n", strerror(errno));
            close(fd);
            fd = -1;
         }
      }
      
      if (ast_opt_cache_record_files && (fd > -1)) {
         char *c;

         fclose(bfile); /* this also closes fd */
         /*
           We touch orig_fn just as a place-holder so other things (like vmail) see the file is there.
           What we are really doing is writing to record_cache_dir until we are done then we will mv the file into place.
         */
         orig_fn = ast_strdupa(fn);
         for (c = fn; *c; c++)
            if (*c == '/')
               *c = '_';

         size = strlen(fn) + strlen(record_cache_dir) + 2;
         buf = alloca(size);
         strcpy(buf, record_cache_dir);
         strcat(buf, "/");
         strcat(buf, fn);
         ast_free(fn);
         fn = buf;
         fd = open(fn, flags | myflags, mode);
         if (fd > -1) {
            /* fdopen() the resulting file stream */
            bfile = fdopen(fd, ((flags | myflags) & O_RDWR) ? "w+" : "w");
            if (!bfile) {
               ast_log(LOG_WARNING, "Whoa, fdopen failed: %s!\n", strerror(errno));
               close(fd);
               fd = -1;
            }
         }
      }
      if (fd > -1) {
         errno = 0;
         fs = get_filestream(f, bfile);
         if (!fs || rewrite_wrapper(fs, comment)) {
            ast_log(LOG_WARNING, "Unable to rewrite %s\n", fn);
            close(fd);
            if (orig_fn) {
               unlink(fn);
               unlink(orig_fn);
            }
            if (fs) {
               ast_closestream(fs);
               fs = NULL;
            }
            continue;
         }
         fs->trans = NULL;
         fs->fmt = f;
         fs->flags = flags;
         fs->mode = mode;
         if (orig_fn) {
            fs->realfilename = ast_strdup(orig_fn);
            fs->filename = ast_strdup(fn);
         } else {
            fs->realfilename = NULL;
            fs->filename = ast_strdup(filename);
         }
         fs->vfs = NULL;
         /* If truncated, we'll be at the beginning; if not truncated, then append */
         f->seek(fs, 0, SEEK_END);
      } else if (errno != EEXIST) {
         ast_log(LOG_WARNING, "Unable to open file %s: %s\n", fn, strerror(errno));
         if (orig_fn)
            unlink(orig_fn);
      }
      /* if buf != NULL then fn is already free and pointing to it */
      if (!buf)
         ast_free(fn);
   }

   AST_RWLIST_UNLOCK(&formats);

   if (!format_found)
      ast_log(LOG_WARNING, "No such format '%s'\n", type);

   return fs;
}

int ast_writestream	(	struct ast_filestream *	fs,
		struct ast_frame *	f
	)

Writes a frame to a stream.

Parameters:

	fs	filestream to write to
	f	frame to write to the filestream Send a frame to a filestream -- note: does NOT free the frame, call ast_frfree manually

Return values:

	0	on success.
	-1	on failure.

Definition at line 143 of file file.c.

References ast_debug, AST_FORMAT_AUDIO_MASK, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_frfree, ast_getformatname(), AST_LIST_NEXT, ast_log(), ast_translate(), ast_translator_build_path(), ast_translator_free_path(), ast_writefile(), ast_writestream(), ast_filestream::filename, ast_filestream::flags, ast_filestream::fmt, ast_format::format, ast_frame::frame_list, ast_frame::frametype, ast_filestream::lastwriteformat, LOG_WARNING, ast_filestream::mode, ast_format::name, ast_frame::subclass, ast_filestream::trans, type, ast_filestream::vfs, and ast_format::write.

Referenced by __ast_play_and_record(), __ast_read(), ast_write(), ast_writestream(), dictate_exec(), handle_cli_file_convert(), handle_recordfile(), mixmonitor_thread(), record_exec(), and recordthread().

{
   int res = -1;
   int alt = 0;
   if (f->frametype == AST_FRAME_VIDEO) {
      if (fs->fmt->format & AST_FORMAT_AUDIO_MASK) {
         /* This is the audio portion.  Call the video one... */
         if (!fs->vfs && fs->filename) {
            const char *type = ast_getformatname(f->subclass & ~0x1);
            fs->vfs = ast_writefile(fs->filename, type, NULL, fs->flags, 0, fs->mode);
            ast_debug(1, "Opened video output file\n");
         }
         if (fs->vfs)
            return ast_writestream(fs->vfs, f);
         /* else ignore */
         return 0;            
      } else {
         /* Might / might not have mark set */
         alt = 1;
      }
   } else if (f->frametype != AST_FRAME_VOICE) {
      ast_log(LOG_WARNING, "Tried to write non-voice frame\n");
      return -1;
   }
   if (((fs->fmt->format | alt) & f->subclass) == f->subclass) {
      res =  fs->fmt->write(fs, f);
      if (res < 0) 
         ast_log(LOG_WARNING, "Natural write failed\n");
      else if (res > 0)
         ast_log(LOG_WARNING, "Huh??\n");
   } else {
      /* XXX If they try to send us a type of frame that isn't the normal frame, and isn't
             the one we've setup a translator for, we do the "wrong thing" XXX */
      if (fs->trans && f->subclass != fs->lastwriteformat) {
         ast_translator_free_path(fs->trans);
         fs->trans = NULL;
      }
      if (!fs->trans) 
         fs->trans = ast_translator_build_path(fs->fmt->format, f->subclass);
      if (!fs->trans)
         ast_log(LOG_WARNING, "Unable to translate to format %s, source format %s\n",
            fs->fmt->name, ast_getformatname(f->subclass));
      else {
         struct ast_frame *trf;
         fs->lastwriteformat = f->subclass;
         /* Get the translated frame but don't consume the original in case they're using it on another stream */
         if ((trf = ast_translate(fs->trans, f, 0))) {
            struct ast_frame *cur;

            /* the translator may have returned multiple frames, so process them */
            for (cur = trf; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
               if ((res = fs->fmt->write(fs, trf))) {
                  ast_log(LOG_WARNING, "Translated frame write failed\n");
                  break;
               }
            }
            ast_frfree(trf);
         } else {
            res = 0;
         }
      }
   }
   return res;
}

static char* build_filename	(	const char *	filename,
		const char *	ext
	)			[static]

construct a filename. Absolute pathnames are preserved, relative names are prefixed by the sounds/ directory. The wav49 suffix is replaced by 'WAV'. Returns a malloc'ed string to be freed by the caller.

Definition at line 251 of file file.c.

References asprintf, ast_config_AST_DATA_DIR, ast_log(), errno, and LOG_WARNING.

Referenced by ast_filehelper(), ast_readfile(), and ast_writefile().

{
   char *fn = NULL;

   if (!strcmp(ext, "wav49"))
      ext = "WAV";

   if (filename[0] == '/') {
      if (asprintf(&fn, "%s.%s", filename, ext) < 0) {
         ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
         fn = NULL;
      }
   } else {
      if (asprintf(&fn, "%s/sounds/%s.%s",
              ast_config_AST_DATA_DIR, filename, ext) < 0) {
         ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
         fn = NULL;
      }
   }
   return fn;
}

static int copy	(	const char *	infile,
		const char *	outfile
	)			[static]

Definition at line 208 of file file.c.

References AST_FILE_MODE, ast_log(), buf, errno, len(), and LOG_WARNING.

Referenced by ast_filehelper(), ast_func_read(), ast_func_write(), copy_plain_file(), and iax2_register().

{
   int ifd, ofd, len;
   char buf[4096];   /* XXX make it lerger. */

   if ((ifd = open(infile, O_RDONLY)) < 0) {
      ast_log(LOG_WARNING, "Unable to open %s in read-only mode\n", infile);
      return -1;
   }
   if ((ofd = open(outfile, O_WRONLY | O_TRUNC | O_CREAT, AST_FILE_MODE)) < 0) {
      ast_log(LOG_WARNING, "Unable to open %s in write-only mode\n", outfile);
      close(ifd);
      return -1;
   }
   while ( (len = read(ifd, buf, sizeof(buf)) ) ) {
      int res;
      if (len < 0) {
         ast_log(LOG_WARNING, "Read failed on %s: %s\n", infile, strerror(errno));
         break;
      }
      /* XXX handle partial writes */
      res = write(ofd, buf, len);
      if (res != len) {
         ast_log(LOG_WARNING, "Write failed on %s (%d of %d): %s\n", outfile, res, len, strerror(errno));
         len = -1; /* error marker */
         break;
      }
   }
   close(ifd);
   close(ofd);
   if (len < 0) {
      unlink(outfile);
      return -1; /* error */
   }
   return 0;   /* success */
}

static int exts_compare	(	const char *	exts,
		const char *	type
	)			[static]

Definition at line 275 of file file.c.

References ast_copy_string(), ext, and strsep().

Referenced by ast_filehelper(), ast_readfile(), and ast_writefile().

{
   char tmp[256];
   char *stringp = tmp, *ext;

   ast_copy_string(tmp, exts, sizeof(tmp));
   while ((ext = strsep(&stringp, "|"))) {
      if (!strcmp(ext, type))
         return 1;
   }

   return 0;
}

static int fileexists_core	(	const char *	filename,
		const char *	fmt,
		const char *	preflang,
		char *	buf,
		int	buflen
	)			[static]

helper routine to locate a file with a given format and language preference. Try preflang, preflang with stripped '_' suffix, or NULL. In the standard asterisk, language goes just before the last component. In an alternative configuration, the language should be a prefix to the actual filename.

The last parameter(s) point to a buffer of sufficient size, which on success is filled with the matching filename.

Definition at line 562 of file file.c.

References ast_strdupa, ast_strlen_zero(), DEFAULT_LANGUAGE, fileexists_test(), and strsep().

Referenced by ast_fileexists(), ast_openstream_full(), and ast_openvstream().

{
   int res = -1;
   char *lang = NULL;

   if (buf == NULL) {
      return -1;
   }

   /* We try languages in the following order:
    *    preflang (may include dialect)
    *    lang (preflang without dialect - if any)
    *    <none>
    *    default (unless the same as preflang or lang without dialect)
    */

   /* Try preferred language */
   if (!ast_strlen_zero(preflang)) {
      /* try the preflang exactly as it was requested */
      if ((res = fileexists_test(filename, fmt, preflang, buf, buflen)) > 0) {
         return res;
      } else {
         /* try without a dialect */
         char *postfix = NULL;
         postfix = lang = ast_strdupa(preflang);

         strsep(&postfix, "_");
         if (postfix) {
            if ((res = fileexists_test(filename, fmt, lang, buf, buflen)) > 0) {
               return res;
            }
         }
      }
   }

   /* Try without any language */
   if ((res = fileexists_test(filename, fmt, NULL, buf, buflen)) > 0) {
      return res;
   }

   /* Finally try the default language unless it was already tried before */
   if ((ast_strlen_zero(preflang) || strcmp(preflang, DEFAULT_LANGUAGE)) && (ast_strlen_zero(lang) || strcmp(lang, DEFAULT_LANGUAGE))) {
      if ((res = fileexists_test(filename, fmt, DEFAULT_LANGUAGE, buf, buflen)) > 0) {
         return res;
      }
   }

   return 0;
}

static int fileexists_test	(	const char *	filename,
		const char *	fmt,
		const char *	lang,
		char *	buf,
		int	buflen
	)			[static]

Definition at line 525 of file file.c.

References ACTION_EXISTS, ast_filehelper(), and is_absolute_path().

Referenced by fileexists_core().

{
   if (buf == NULL) {
      return -1;
   }

   if (ast_language_is_prefix && !is_absolute_path(filename)) { /* new layout */
      if (lang) {
         snprintf(buf, buflen, "%s/%s", lang, filename);
      } else {
         snprintf(buf, buflen, "%s", filename);
      }
   } else { /* old layout */
      strcpy(buf, filename);  /* first copy the full string */
      if (lang) {
         /* insert the language and suffix if needed */
         const char *c = strrchr(filename, '/');
         int offset = c ? c - filename + 1 : 0; /* points right after the last '/' */
         snprintf(buf + offset, buflen - offset, "%s/%s", lang, filename + offset);
      }
   }

   return ast_filehelper(buf, NULL, fmt, ACTION_EXISTS);
}

static void filestream_destructor

(

void *

arg

)

[static]

Definition at line 289 of file file.c.

References ast_closestream(), AST_FORMAT_AUDIO_MASK, ast_module_unref(), ast_safe_system(), AST_SCHED_DEL, ast_settimeout(), ast_translator_free_path(), ast_format::close, ast_filestream::f, f, ast_filestream::filename, ast_filestream::fmt, ast_format::format, free, ast_format::module, ast_filestream::orig_chan_name, ast_filestream::owner, ast_filestream::realfilename, ast_channel::sched, ast_channel::stream, ast_channel::streamid, ast_filestream::trans, ast_filestream::vfs, ast_channel::vstream, and ast_channel::vstreamid.

Referenced by get_filestream().

{
   char *cmd = NULL;
   size_t size = 0;
   struct ast_filestream *f = arg;

   /* Stop a running stream if there is one */
   if (f->owner) {
      if (f->fmt->format < AST_FORMAT_AUDIO_MASK) {
         f->owner->stream = NULL;
         AST_SCHED_DEL(f->owner->sched, f->owner->streamid);
#ifdef HAVE_DAHDI
         ast_settimeout(f->owner, 0, NULL, NULL);
#endif         
      } else {
         f->owner->vstream = NULL;
         AST_SCHED_DEL(f->owner->sched, f->owner->vstreamid);
      }
   }
   /* destroy the translator on exit */
   if (f->trans)
      ast_translator_free_path(f->trans);

   if (f->realfilename && f->filename) {
         size = strlen(f->filename) + strlen(f->realfilename) + 15;
         cmd = alloca(size);
         memset(cmd,0,size);
         snprintf(cmd,size,"/bin/mv -f %s %s",f->filename,f->realfilename);
         ast_safe_system(cmd);
   }

   if (f->filename)
      free(f->filename);
   if (f->realfilename)
      free(f->realfilename);
   if (f->fmt->close) {
      void (*closefn)(struct ast_filestream *) = f->fmt->close;
      closefn(f);
   }
   if (f->f)
      fclose(f->f);
   if (f->vfs)
      ast_closestream(f->vfs);
   if (f->orig_chan_name)
      free((void *) f->orig_chan_name);
   ast_module_unref(f->fmt->module);
}

static int fn_wrapper	(	struct ast_filestream *	s,
		const char *	comment,
		enum wrap_fn	mode
	)			[static]

Definition at line 361 of file file.c.

References ast_log(), ast_module_ref(), f, ast_filestream::fmt, LOG_WARNING, ast_format::module, ast_format::name, ast_format::open, ast_format::rewrite, WRAP_OPEN, and WRAP_REWRITE.

Referenced by open_wrapper(), and rewrite_wrapper().

{
   struct ast_format *f = s->fmt;
   int ret = -1;
   int (*openfn)(struct ast_filestream *s);

   if (mode == WRAP_OPEN && (openfn = f->open) && openfn(s))
      ast_log(LOG_WARNING, "Unable to open format %s\n", f->name);
   else if (mode == WRAP_REWRITE && f->rewrite && f->rewrite(s, comment))
      ast_log(LOG_WARNING, "Unable to rewrite format %s\n", f->name);
   else {
      /* preliminary checks succeed. update usecount */
      ast_module_ref(f->module);
      ret = 0;
   }
   return ret;
}

static struct ast_filestream* get_filestream	(	struct ast_format *	fmt,
		FILE *	bfile
	)			[static, read]

Definition at line 337 of file file.c.

References ast_filestream::_private, ao2_alloc(), ast_filestream::buf, ast_format::buf_size, ast_format::desc_size, ast_filestream::f, filestream_destructor(), ast_filestream::fmt, ast_filestream::fr, ast_format::name, s, and ast_frame::src.

Referenced by ast_filehelper(), ast_readfile(), and ast_writefile().

{
   struct ast_filestream *s;

   int l = sizeof(*s) + fmt->buf_size + fmt->desc_size;  /* total allocation size */
   if ( (s = ao2_alloc(l, filestream_destructor)) == NULL)
      return NULL;
   s->fmt = fmt;
   s->f = bfile;

   if (fmt->desc_size)
      s->_private = ((char *)(s + 1)) + fmt->buf_size;
   if (fmt->buf_size)
      s->buf = (char *)(s + 1);
   s->fr.src = fmt->name;
   return s;
}

static char* handle_cli_core_show_file_formats	(	struct ast_cli_entry *	e,
		int	cmd,
		struct ast_cli_args *	a
	)			[static]

Definition at line 1338 of file file.c.

References ast_cli_args::argc, ast_cli(), ast_getformatname(), AST_RWLIST_RDLOCK, AST_RWLIST_TRAVERSE, AST_RWLIST_UNLOCK, CLI_GENERATE, CLI_INIT, CLI_SHOWUSAGE, CLI_SUCCESS, ast_cli_entry::command, ast_format::exts, f, ast_cli_args::fd, ast_format::format, FORMAT, FORMAT2, ast_format::list, ast_format::name, and ast_cli_entry::usage.

{
#define FORMAT "%-10s %-10s %-20s\n"
#define FORMAT2 "%-10s %-10s %-20s\n"
   struct ast_format *f;
   int count_fmt = 0;

   switch (cmd) {
   case CLI_INIT:
      e->command = "core show file formats";
      e->usage =
         "Usage: core show file formats\n"
         "       Displays currently registered file formats (if any).\n";
      return NULL;
   case CLI_GENERATE:
      return NULL;
   }

   if (a->argc != 4)
      return CLI_SHOWUSAGE;

   ast_cli(a->fd, FORMAT, "Format", "Name", "Extensions");
   ast_cli(a->fd, FORMAT, "------", "----", "----------");

   AST_RWLIST_RDLOCK(&formats);
   AST_RWLIST_TRAVERSE(&formats, f, list) {
      ast_cli(a->fd, FORMAT2, ast_getformatname(f->format), f->name, f->exts);
      count_fmt++;
   }
   AST_RWLIST_UNLOCK(&formats);
   ast_cli(a->fd, "%d file formats registered.\n", count_fmt);
   return CLI_SUCCESS;
#undef FORMAT
#undef FORMAT2
}

static int is_absolute_path

(

const char *

filename

)

[static]

Definition at line 520 of file file.c.

Referenced by fileexists_test().

{
   return filename[0] == '/';
}

static int open_wrapper

(

struct ast_filestream *

s

)

[static]

Definition at line 384 of file file.c.

References fn_wrapper(), and WRAP_OPEN.

Referenced by ast_filehelper(), and ast_readfile().

{
   return fn_wrapper(s, NULL, WRAP_OPEN);
}

static struct ast_frame* read_frame	(	struct ast_filestream *	s,
		int *	whennext
	)			[static, read]

Definition at line 689 of file file.c.

References ast_frfree, ast_frisolate(), ast_filestream::fmt, and ast_format::read.

Referenced by ast_audiohook_read_frame(), ast_readaudio_callback(), ast_readframe(), and ast_readvideo_callback().

{
   struct ast_frame *fr, *new_fr;

   if (!s || !s->fmt) {
      return NULL;
   }

   if (!(fr = s->fmt->read(s, whennext))) {
      return NULL;
   }

   if (!(new_fr = ast_frisolate(fr))) {
      ast_frfree(fr);
      return NULL;
   }

   if (new_fr != fr) {
      ast_frfree(fr);
      fr = new_fr;
   }

   return fr;
}

static int rewrite_wrapper	(	struct ast_filestream *	s,
		const char *	comment
	)			[static]

Definition at line 379 of file file.c.

References fn_wrapper(), and WRAP_REWRITE.

Referenced by ast_writefile().

{
   return fn_wrapper(s, comment, WRAP_REWRITE);
}

static int waitstream_core	(	struct ast_channel *	c,
		const char *	breakon,
		const char *	forward,
		const char *	rewind,
		int	skip_ms,
		int	audiofd,
		int	cmdfd,
		const char *	context
	)			[static]

the core of all waitstream() functions

Definition at line 1152 of file file.c.

References ast_channel::_softhangup, ast_clear_flag, AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_HANGUP, AST_CONTROL_HOLD, AST_CONTROL_RINGING, AST_CONTROL_SRCUPDATE, AST_CONTROL_UNHOLD, AST_CONTROL_VIDUPDATE, ast_exists_extension(), AST_FLAG_END_DTMF_ONLY, AST_FLAG_MASQ_NOSTREAM, AST_FRAME_CONTROL, AST_FRAME_DTMF_END, AST_FRAME_VOICE, ast_frfree, ast_log(), ast_read(), ast_sched_runq(), ast_sched_wait(), ast_set_flag, ast_stopstream(), ast_strdupa, ast_stream_fastforward(), ast_stream_rewind(), ast_test_flag, ast_waitfor(), ast_waitfor_nandfds(), ast_channel::cid, ast_callerid::cid_num, ast_frame::data, ast_frame::datalen, errno, exten, ast_filestream::f, ast_frame::frametype, LOG_WARNING, ast_channel::name, ast_filestream::orig_chan_name, ast_channel::sched, ast_channel::stream, and ast_frame::subclass.

Referenced by ast_waitstream(), ast_waitstream_exten(), ast_waitstream_fr(), and ast_waitstream_full().

{
   const char *orig_chan_name = NULL;
   int err = 0;

   if (!breakon)
      breakon = "";
   if (!forward)
      forward = "";
   if (!rewind)
      rewind = "";

   /* Switch the channel to end DTMF frame only. waitstream_core doesn't care about the start of DTMF. */
   ast_set_flag(c, AST_FLAG_END_DTMF_ONLY);

   if (ast_test_flag(c, AST_FLAG_MASQ_NOSTREAM))
      orig_chan_name = ast_strdupa(c->name);

   while (c->stream) {
      int res;
      int ms;

      if (orig_chan_name && strcasecmp(orig_chan_name, c->name)) {
         ast_stopstream(c);
         err = 1;
         break;
      }

      ms = ast_sched_wait(c->sched);

      if (ms < 0 && !c->timingfunc) {
         ast_stopstream(c);
         break;
      }
      if (ms < 0)
         ms = 1000;
      if (cmdfd < 0) {
         res = ast_waitfor(c, ms);
         if (res < 0) {
            ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
            ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
            return res;
         }
      } else {
         int outfd;
         struct ast_channel *rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
         if (!rchan && (outfd < 0) && (ms)) {
            /* Continue */
            if (errno == EINTR)
               continue;
            ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
            ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
            return -1;
         } else if (outfd > -1) { /* this requires cmdfd set */
            /* The FD we were watching has something waiting */
            ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
            return 1;
         }
         /* if rchan is set, it is 'c' */
         res = rchan ? 1 : 0; /* map into 'res' values */
      }
      if (res > 0) {
         struct ast_frame *fr = ast_read(c);
         if (!fr) {
            ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
            return -1;
         }
         switch (fr->frametype) {
         case AST_FRAME_DTMF_END:
            if (context) {
               const char exten[2] = { fr->subclass, '\0' };
               if (ast_exists_extension(c, context, exten, 1, c->cid.cid_num)) {
                  res = fr->subclass;
                  ast_frfree(fr);
                  ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
                  return res;
               }
            } else {
               res = fr->subclass;
               if (strchr(forward, res)) {
                  int eoftest;
                  ast_stream_fastforward(c->stream, skip_ms);
                  eoftest = fgetc(c->stream->f);
                  if (feof(c->stream->f)) {
                     ast_stream_rewind(c->stream, skip_ms);
                  } else {
                     ungetc(eoftest, c->stream->f);
                  }
               } else if (strchr(rewind, res)) {
                  ast_stream_rewind(c->stream, skip_ms);
               } else if (strchr(breakon, res)) {
                  ast_frfree(fr);
                  ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
                  return res;
               }              
            }
            break;
         case AST_FRAME_CONTROL:
            switch (fr->subclass) {
            case AST_CONTROL_HANGUP:
            case AST_CONTROL_BUSY:
            case AST_CONTROL_CONGESTION:
               ast_frfree(fr);
               ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
               return -1;
            case AST_CONTROL_RINGING:
            case AST_CONTROL_ANSWER:
            case AST_CONTROL_VIDUPDATE:
            case AST_CONTROL_SRCUPDATE:
            case AST_CONTROL_HOLD:
            case AST_CONTROL_UNHOLD:
            case -1:
               /* Unimportant */
               break;
            default:
               ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
            }
            break;
         case AST_FRAME_VOICE:
            /* Write audio if appropriate */
            if (audiofd > -1) {
               if (write(audiofd, fr->data, fr->datalen) < 0) {
                  ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
               }
            }
         default:
            /* Ignore all others */
            break;
         }
         ast_frfree(fr);
      }
      ast_sched_runq(c->sched);
   }

   ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);

   return (err || c->_softhangup) ? -1 : 0;
}

---

Variable Documentation

int ast_language_is_prefix = 1

Definition at line 56 of file file.c.

Referenced by ast_readconfig(), handle_show_settings(), and main().

struct ast_cli_entry cli_file[]

Initial value:

 {
   AST_CLI_DEFINE(handle_cli_core_show_file_formats, "Displays file formats")
}

Definition at line 1374 of file file.c.