Save to raw, headerless iLBC data. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"

Include dependency graph for format_ilbc.c:

Go to the source code of this file.

Defines
#define	ILBC_BUF_SIZE 50
#define	ILBC_SAMPLES 240
Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static struct ast_frame *	ilbc_read (struct ast_filestream s, int whennext)
static int	ilbc_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
static off_t	ilbc_tell (struct ast_filestream *fs)
static int	ilbc_trunc (struct ast_filestream *fs)
static int	ilbc_write (struct ast_filestream fs, struct ast_frame f)
static int	load_module (void)
static int	unload_module (void)
Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw iLBC data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_format	ilbc_f

Detailed Description

Save to raw, headerless iLBC data.

File name extension: ilbc

Definition in file format_ilbc.c.

Define Documentation

#define ILBC_BUF_SIZE 50

Definition at line 44 of file format_ilbc.c.

Referenced by ilbc_read(), ilbc_seek(), and ilbc_tell().

#define ILBC_SAMPLES 240

Definition at line 45 of file format_ilbc.c.

Referenced by ilbc_read(), ilbc_seek(), and ilbc_tell().

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 154 of file format_ilbc.c.

static void __unreg_module ( void ) [static]

Definition at line 154 of file format_ilbc.c.

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

Definition at line 47 of file format_ilbc.c.

References AST_FORMAT_ILBC, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, ILBC_BUF_SIZE, ILBC_SAMPLES, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

{
   int res;
   /* Send a frame from the file to the appropriate channel */
   s->fr.frametype = AST_FRAME_VOICE;
   s->fr.subclass.codec = AST_FORMAT_ILBC;
   s->fr.mallocd = 0;
   AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, ILBC_BUF_SIZE);
   if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
      if (res)
         ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
      return NULL;
   }
   *whennext = s->fr.samples = ILBC_SAMPLES;
   return &s->fr;
}

static int ilbc_seek	(	struct ast_filestream *	fs,
		off_t	sample_offset,
		int	whence
	)		`[static]`

Definition at line 86 of file format_ilbc.c.

References ast_filestream::f, ILBC_BUF_SIZE, ILBC_SAMPLES, ast_frame::offset, and SEEK_FORCECUR.

{
   long bytes;
   off_t min,cur,max,offset=0;
   min = 0;
   cur = ftello(fs->f);
   fseeko(fs->f, 0, SEEK_END);
   max = ftello(fs->f);
   
   bytes = ILBC_BUF_SIZE * (sample_offset / ILBC_SAMPLES);
   if (whence == SEEK_SET)
      offset = bytes;
   else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
      offset = cur + bytes;
   else if (whence == SEEK_END)
      offset = max - bytes;
   if (whence != SEEK_FORCECUR) {
      offset = (offset > max)?max:offset;
   }
   /* protect against seeking beyond begining. */
   offset = (offset < min)?min:offset;
   if (fseeko(fs->f, offset, SEEK_SET) < 0)
      return -1;
   return 0;
}

static off_t ilbc_tell ( struct ast_filestream * fs ) [static]

Definition at line 120 of file format_ilbc.c.

References ast_filestream::f, ILBC_BUF_SIZE, ILBC_SAMPLES, and ast_frame::offset.

{
   off_t offset = ftello(fs->f);
   return (offset/ILBC_BUF_SIZE)*ILBC_SAMPLES;
}

static int ilbc_trunc ( struct ast_filestream * fs ) [static]

Definition at line 112 of file format_ilbc.c.

References ast_filestream::f.

{
   /* Truncate file to current length */
   if (ftruncate(fileno(fs->f), ftello(fs->f)) < 0)
      return -1;
   return 0;
}

static int ilbc_write	(	struct ast_filestream *	fs,
		struct ast_frame *	f
	)		`[static]`

Definition at line 64 of file format_ilbc.c.

References AST_FORMAT_ILBC, AST_FRAME_VOICE, ast_getformatname(), ast_log(), ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, LOG_WARNING, ast_frame::ptr, and ast_frame::subclass.

{
   int res;
   if (f->frametype != AST_FRAME_VOICE) {
      ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
      return -1;
   }
   if (f->subclass.codec != AST_FORMAT_ILBC) {
      ast_log(LOG_WARNING, "Asked to write non-iLBC frame (%s)!\n", ast_getformatname(f->subclass.codec));
      return -1;
   }
   if (f->datalen % 50) {
      ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\n", f->datalen);
      return -1;
   }
   if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
         ast_log(LOG_WARNING, "Bad write (%d/50): %s\n", res, strerror(errno));
         return -1;
   }
   return 0;
}

static int load_module ( void ) [static]

Definition at line 138 of file format_ilbc.c.

References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.

{
   if (ast_format_register(&ilbc_f))
      return AST_MODULE_LOAD_FAILURE;
   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 145 of file format_ilbc.c.

References ast_format_unregister(), and ast_format::name.

{
   return ast_format_unregister(ilbc_f.name);
}

Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw iLBC data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static]

Definition at line 154 of file format_ilbc.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 154 of file format_ilbc.c.

struct ast_format ilbc_f [static]

Definition at line 126 of file format_ilbc.c.

Asterisk developer's documentation

Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation