Asterisk - The Open Source Telephony Project GIT-master-2de1a68
Macros | Functions | Variables
format_g719.c File Reference

ITU G.719 , 64kbps bitrate only. 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_g719.c:

Go to the source code of this file.

Macros

#define BUF_SIZE   160 /* 20 milliseconds == 160 bytes, 960 samples */
 
#define BYTES_TO_SAMPLES(x)   ((typeof(x)) x * ((float) 960 / 160))
 
#define SAMPLES_TO_BYTES(x)   ((typeof(x)) x / ((float) 960 / 160))
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static struct ast_frameg719read (struct ast_filestream *s, int *whennext)
 
static int g719seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t g719tell (struct ast_filestream *fs)
 
static int g719trunc (struct ast_filestream *fs)
 
static int g719write (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 = "ITU G.719" , .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 g719_f
 

Detailed Description

ITU G.719 , 64kbps bitrate only.

Definition in file format_g719.c.

Macro Definition Documentation

◆ BUF_SIZE

#define BUF_SIZE   160 /* 20 milliseconds == 160 bytes, 960 samples */

Definition at line 37 of file format_g719.c.

◆ BYTES_TO_SAMPLES

#define BYTES_TO_SAMPLES (   x)    ((typeof(x)) x * ((float) 960 / 160))

Definition at line 39 of file format_g719.c.

◆ SAMPLES_TO_BYTES

#define SAMPLES_TO_BYTES (   x)    ((typeof(x)) x / ((float) 960 / 160))

Definition at line 38 of file format_g719.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 158 of file format_g719.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 158 of file format_g719.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 158 of file format_g719.c.

◆ g719read()

static struct ast_frame * g719read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 41 of file format_g719.c.

42{
43 size_t res;
44
45 /* Send a frame from the file to the appropriate channel */
47 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
48 if (res) {
49 ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
51 strerror(errno));
52 }
53 return NULL;
54 }
55 *whennext = s->fr.samples = BYTES_TO_SAMPLES(res);
56 return &s->fr;
57}
#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 BYTES_TO_SAMPLES(x)
Definition: format_g719.c:39
#define BUF_SIZE
Definition: format_g719.c:37
#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, BUF_SIZE, BYTES_TO_SAMPLES, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

◆ g719seek()

static int g719seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 70 of file format_g719.c.

71{
72 off_t offset = 0, min = 0, cur, max;
73
74 sample_offset = SAMPLES_TO_BYTES(sample_offset);
75
76 if ((cur = ftello(fs->f)) < 0) {
77 ast_log(AST_LOG_WARNING, "Unable to determine current position in g719 filestream %p: %s\n", fs, strerror(errno));
78 return -1;
79 }
80
81 if (fseeko(fs->f, 0, SEEK_END) < 0) {
82 ast_log(AST_LOG_WARNING, "Unable to seek to end of g719 filestream %p: %s\n", fs, strerror(errno));
83 return -1;
84 }
85
86 if ((max = ftello(fs->f)) < 0) {
87 ast_log(AST_LOG_WARNING, "Unable to determine max position in g719 filestream %p: %s\n", fs, strerror(errno));
88 return -1;
89 }
90
91 if (whence == SEEK_SET)
92 offset = sample_offset;
93 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
94 offset = sample_offset + cur;
95 else if (whence == SEEK_END)
96 offset = max - sample_offset;
97
98 if (whence != SEEK_FORCECUR)
99 offset = (offset > max) ? max : offset;
100
101 /* always protect against seeking past begining. */
102 offset = (offset < min) ? min : offset;
103
104 return fseeko(fs->f, offset, SEEK_SET);
105}
#define min(a, b)
Definition: f2c.h:197
#define max(a, b)
Definition: f2c.h:198
#define SEEK_FORCECUR
Definition: file.h:51
#define SAMPLES_TO_BYTES(x)
Definition: format_g719.c:38
#define AST_LOG_WARNING

References ast_log, AST_LOG_WARNING, errno, ast_filestream::f, max, min, ast_frame::offset, SAMPLES_TO_BYTES, and SEEK_FORCECUR.

◆ g719tell()

static off_t g719tell ( struct ast_filestream fs)
static

Definition at line 123 of file format_g719.c.

124{
125 return BYTES_TO_SAMPLES(ftello(fs->f));
126}

References BYTES_TO_SAMPLES, and ast_filestream::f.

◆ g719trunc()

static int g719trunc ( struct ast_filestream fs)
static

Definition at line 107 of file format_g719.c.

108{
109 int fd;
110 off_t cur;
111
112 if ((fd = fileno(fs->f)) < 0) {
113 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for g719 filestream %p: %s\n", fs, strerror(errno));
114 return -1;
115 }
116 if ((cur = ftello(fs->f)) < 0) {
117 ast_log(AST_LOG_WARNING, "Unable to determine current position in g719 filestream %p: %s\n", fs, strerror(errno));
118 return -1;
119 }
120 return ftruncate(fd, cur);
121}

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

◆ g719write()

static int g719write ( struct ast_filestream fs,
struct ast_frame f 
)
static

Definition at line 59 of file format_g719.c.

60{
61 int res;
62
63 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
64 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
65 return -1;
66 }
67 return 0;
68}

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 139 of file format_g719.c.

140{
142
146}
struct ast_format * ast_format_g719
Built-in cached g719 format.
Definition: format_cache.c:156
static struct ast_format_def g719_f
Definition: format_g719.c:128
#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_g719, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_format_def::format, and g719_f.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 148 of file format_g719.c.

149{
151}
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(), g719_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 = "ITU G.719" , .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 158 of file format_g719.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 158 of file format_g719.c.

◆ g719_f

struct ast_format_def g719_f
static

Definition at line 128 of file format_g719.c.

Referenced by load_module(), and unload_module().