Asterisk - The Open Source Telephony Project GIT-master-0bf3178
Macros | Functions | Variables
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"
#include "asterisk/format_cache.h"
Include dependency graph for format_ilbc.c:

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)
 
struct ast_moduleAST_MODULE_SELF_SYM (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 = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_format_def ilbc_f
 

Detailed Description

Save to raw, headerless iLBC data.

Definition in file format_ilbc.c.

Macro Definition Documentation

◆ ILBC_BUF_SIZE

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

Definition at line 43 of file format_ilbc.c.

◆ ILBC_SAMPLES

#define ILBC_SAMPLES   240

Definition at line 44 of file format_ilbc.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 156 of file format_ilbc.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 156 of file format_ilbc.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 156 of file format_ilbc.c.

◆ ilbc_read()

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

Definition at line 46 of file format_ilbc.c.

47{
48 size_t res;
49
50 /* Send a frame from the file to the appropriate channel */
52 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
53 if (res) {
54 ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
56 strerror(errno));
57 }
58 return NULL;
59 }
60 *whennext = s->fr.samples = ILBC_SAMPLES;
61 return &s->fr;
62}
#define ast_log
Definition: astobj2.c:42
const char * ast_format_get_name(const struct ast_format *format)
Get the name associated with a format.
Definition: format.c:334
#define ILBC_BUF_SIZE
Definition: format_ilbc.c:43
#define ILBC_SAMPLES
Definition: format_ilbc.c:44
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
#define LOG_WARNING
int errno
#define NULL
Definition: resample.c:96
struct ast_frame fr
frame produced by read, typically
Definition: mod_format.h:122
struct ast_format * format
struct ast_frame_subclass subclass
union ast_frame::@226 data

References ast_format_get_name(), AST_FRAME_SET_BUFFER, AST_FRIENDLY_OFFSET, ast_log, ast_filestream::buf, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, ILBC_BUF_SIZE, ILBC_SAMPLES, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

◆ ilbc_seek()

static int ilbc_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 78 of file format_ilbc.c.

79{
80 long bytes;
81 off_t min,cur,max,offset=0;
82 min = 0;
83 cur = ftello(fs->f);
84 fseeko(fs->f, 0, SEEK_END);
85 max = ftello(fs->f);
86
87 bytes = ILBC_BUF_SIZE * (sample_offset / ILBC_SAMPLES);
88 if (whence == SEEK_SET)
89 offset = bytes;
90 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
91 offset = cur + bytes;
92 else if (whence == SEEK_END)
93 offset = max - bytes;
94 if (whence != SEEK_FORCECUR) {
95 offset = (offset > max)?max:offset;
96 }
97 /* protect against seeking beyond begining. */
98 offset = (offset < min)?min:offset;
99 if (fseeko(fs->f, offset, SEEK_SET) < 0)
100 return -1;
101 return 0;
102}
#define min(a, b)
Definition: f2c.h:197
#define max(a, b)
Definition: f2c.h:198
#define SEEK_FORCECUR
Definition: file.h:51

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

◆ ilbc_tell()

static off_t ilbc_tell ( struct ast_filestream fs)
static

Definition at line 121 of file format_ilbc.c.

122{
123 off_t offset = ftello(fs->f);
124 return (offset/ILBC_BUF_SIZE)*ILBC_SAMPLES;
125}

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

◆ ilbc_trunc()

static int ilbc_trunc ( struct ast_filestream fs)
static

Definition at line 104 of file format_ilbc.c.

105{
106 int fd;
107 off_t cur;
108
109 if ((fd = fileno(fs->f)) < 0) {
110 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for iLBC filestream %p: %s\n", fs, strerror(errno));
111 return -1;
112 }
113 if ((cur = ftello(fs->f)) < 0) {
114 ast_log(AST_LOG_WARNING, "Unable to determine current position in iLBC filestream %p: %s\n", fs, strerror(errno));
115 return -1;
116 }
117 /* Truncate file to current length */
118 return ftruncate(fd, cur);
119}
#define AST_LOG_WARNING

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

◆ ilbc_write()

static int ilbc_write ( struct ast_filestream fs,
struct ast_frame f 
)
static

Definition at line 64 of file format_ilbc.c.

65{
66 int res;
67 if (f->datalen % 50) {
68 ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\n", f->datalen);
69 return -1;
70 }
71 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
72 ast_log(LOG_WARNING, "Bad write (%d/50): %s\n", res, strerror(errno));
73 return -1;
74 }
75 return 0;
76}

References ast_log, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, LOG_WARNING, and ast_frame::ptr.

◆ load_module()

static int load_module ( void  )
static

Definition at line 138 of file format_ilbc.c.

139{
144}
struct ast_format * ast_format_ilbc
Built-in cached ilbc format.
Definition: format_cache.c:121
static struct ast_format_def ilbc_f
Definition: format_ilbc.c:127
#define ast_format_def_register(f)
Definition: mod_format.h:136
@ AST_MODULE_LOAD_SUCCESS
Definition: module.h:70
@ AST_MODULE_LOAD_DECLINE
Module has failed to load, may be in an inconsistent state.
Definition: module.h:78
struct ast_format * format
Definition: mod_format.h:48

References ast_format_def_register, ast_format_ilbc, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_format_def::format, and ilbc_f.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 146 of file format_ilbc.c.

147{
149}
int ast_format_def_unregister(const char *name)
Unregisters a file format.
Definition: file.c:162
char name[80]
Definition: mod_format.h:44

References ast_format_def_unregister(), ilbc_f, and ast_format_def::name.

Variable Documentation

◆ __mod_info

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, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 156 of file format_ilbc.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 156 of file format_ilbc.c.

◆ ilbc_f

struct ast_format_def ilbc_f
static

Definition at line 127 of file format_ilbc.c.

Referenced by load_module(), and unload_module().