Wed Jan 8 2020 09:50:12

Asterisk developer's documentation


format_ilbc.c File Reference

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

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

Go to the source code of this file.

Macros

#define ILBC_BUF_SIZE   50 /* One Real iLBC Frame */
 
#define ILBC_SAMPLES   240
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
static struct ast_frameilbc_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 = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static struct ast_module_infoast_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.

Macro Definition Documentation

#define ILBC_BUF_SIZE   50 /* One Real iLBC Frame */

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 163 of file format_ilbc.c.

static void __unreg_module ( void  )
static

Definition at line 163 of file format_ilbc.c.

static struct ast_frame* ilbc_read ( struct ast_filestream s,
int *  whennext 
)
static

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.

48 {
49  int res;
50  /* Send a frame from the file to the appropriate channel */
53  s->fr.mallocd = 0;
55  if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
56  if (res)
57  ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
58  return NULL;
59  }
60  *whennext = s->fr.samples = ILBC_SAMPLES;
61  return &s->fr;
62 }
union ast_frame_subclass subclass
Definition: frame.h:146
void * ptr
Definition: frame.h:160
#define LOG_WARNING
Definition: logger.h:144
#define ILBC_SAMPLES
Definition: format_ilbc.c:45
format_t codec
Definition: frame.h:137
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
Definition: frame.h:183
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
Definition: frame.h:204
int datalen
Definition: frame.h:148
struct ast_frame fr
Definition: mod_format.h:117
#define ILBC_BUF_SIZE
Definition: format_ilbc.c:44
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
int mallocd
Definition: frame.h:152
enum ast_frame_type frametype
Definition: frame.h:144
union ast_frame::@172 data
#define AST_FORMAT_ILBC
Definition: frame.h:262
int samples
Definition: frame.h:150
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.

87 {
88  long bytes;
89  off_t min,cur,max,offset=0;
90  min = 0;
91  cur = ftello(fs->f);
92  fseeko(fs->f, 0, SEEK_END);
93  max = ftello(fs->f);
94 
95  bytes = ILBC_BUF_SIZE * (sample_offset / ILBC_SAMPLES);
96  if (whence == SEEK_SET)
97  offset = bytes;
98  else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
99  offset = cur + bytes;
100  else if (whence == SEEK_END)
101  offset = max - bytes;
102  if (whence != SEEK_FORCECUR) {
103  offset = (offset > max)?max:offset;
104  }
105  /* protect against seeking beyond begining. */
106  offset = (offset < min)?min:offset;
107  if (fseeko(fs->f, offset, SEEK_SET) < 0)
108  return -1;
109  return 0;
110 }
#define ILBC_SAMPLES
Definition: format_ilbc.c:45
#define ILBC_BUF_SIZE
Definition: format_ilbc.c:44
#define SEEK_FORCECUR
Definition: file.h:50
static off_t ilbc_tell ( struct ast_filestream fs)
static

Definition at line 129 of file format_ilbc.c.

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

130 {
131  off_t offset = ftello(fs->f);
132  return (offset/ILBC_BUF_SIZE)*ILBC_SAMPLES;
133 }
#define ILBC_SAMPLES
Definition: format_ilbc.c:45
#define ILBC_BUF_SIZE
Definition: format_ilbc.c:44
static int ilbc_trunc ( struct ast_filestream fs)
static

Definition at line 112 of file format_ilbc.c.

References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.

113 {
114  int fd;
115  off_t cur;
116 
117  if ((fd = fileno(fs->f)) < 0) {
118  ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for iLBC filestream %p: %s\n", fs, strerror(errno));
119  return -1;
120  }
121  if ((cur = ftello(fs->f)) < 0) {
122  ast_log(AST_LOG_WARNING, "Unable to determine current position in iLBC filestream %p: %s\n", fs, strerror(errno));
123  return -1;
124  }
125  /* Truncate file to current length */
126  return ftruncate(fd, cur);
127 }
#define AST_LOG_WARNING
Definition: logger.h:149
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
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.

65 {
66  int res;
67  if (f->frametype != AST_FRAME_VOICE) {
68  ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
69  return -1;
70  }
71  if (f->subclass.codec != AST_FORMAT_ILBC) {
72  ast_log(LOG_WARNING, "Asked to write non-iLBC frame (%s)!\n", ast_getformatname(f->subclass.codec));
73  return -1;
74  }
75  if (f->datalen % 50) {
76  ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\n", f->datalen);
77  return -1;
78  }
79  if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
80  ast_log(LOG_WARNING, "Bad write (%d/50): %s\n", res, strerror(errno));
81  return -1;
82  }
83  return 0;
84 }
union ast_frame_subclass subclass
Definition: frame.h:146
void * ptr
Definition: frame.h:160
#define LOG_WARNING
Definition: logger.h:144
format_t codec
Definition: frame.h:137
int datalen
Definition: frame.h:148
char * ast_getformatname(format_t format)
Get the name of a format.
Definition: frame.c:578
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
enum ast_frame_type frametype
Definition: frame.h:144
union ast_frame::@172 data
#define AST_FORMAT_ILBC
Definition: frame.h:262
static int load_module ( void  )
static

Definition at line 147 of file format_ilbc.c.

References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.

148 {
152 }
#define ast_format_register(f)
Definition: mod_format.h:131
static struct ast_format ilbc_f
Definition: format_ilbc.c:135
static int unload_module ( void  )
static

Definition at line 154 of file format_ilbc.c.

References ast_format_unregister(), and ast_format::name.

155 {
157 }
int ast_format_unregister(const char *name)
Unregisters a file format.
Definition: file.c:104
char name[80]
Definition: mod_format.h:44
static struct ast_format ilbc_f
Definition: format_ilbc.c:135

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 = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 163 of file format_ilbc.c.

Definition at line 163 of file format_ilbc.c.

struct ast_format ilbc_f
static

Definition at line 135 of file format_ilbc.c.