Asterisk - The Open Source Telephony Project GIT-master-0bf3178
Functions | Variables
func_jitterbuffer.c File Reference

Put a jitterbuffer on the read side of a channel. More...

#include "asterisk.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/framehook.h"
#include "asterisk/frame.h"
#include "asterisk/pbx.h"
#include "asterisk/abstract_jb.h"
#include "asterisk/timing.h"
#include "asterisk/app.h"
Include dependency graph for func_jitterbuffer.c:

Go to the source code of this file.

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static int jb_helper (struct ast_channel *chan, const char *cmd, char *data, const char *value)
 
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 = "Jitter buffer for read side of channel." , .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_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_custom_function jb_function
 

Detailed Description

Put a jitterbuffer on the read side of a channel.

Author
David Vossel dvoss.nosp@m.el@d.nosp@m.igium.nosp@m..com

Definition in file func_jitterbuffer.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 196 of file func_jitterbuffer.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 196 of file func_jitterbuffer.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 196 of file func_jitterbuffer.c.

◆ jb_helper()

static int jb_helper ( struct ast_channel chan,
const char *  cmd,
char *  data,
const char *  value 
)
static

Definition at line 115 of file func_jitterbuffer.c.

116{
117 struct ast_jb_conf jb_conf;
118
119 if (!chan) {
120 ast_log(LOG_WARNING, "No channel was provided to %s function.\n", cmd);
121 return -1;
122 }
123
124 /* Initialize and set jb_conf */
126
127 /* Now check user options to see if any of the defaults need to change. */
128 if (!ast_strlen_zero(data)) {
129 if (strcasecmp(data, "fixed") &&
130 strcasecmp(data, "adaptive") &&
131 strcasecmp(data, "disabled")) {
132 ast_log(LOG_WARNING, "Unknown Jitterbuffer type %s. Failed to create jitterbuffer.\n", data);
133 return -1;
134 }
135 ast_copy_string(jb_conf.impl, data, sizeof(jb_conf.impl));
136 }
137
138 if (!ast_strlen_zero(value) && strcasecmp(value, "default")) {
139 char *parse = ast_strdupa(value);
140 int res = 0;
145 AST_APP_ARG(sync_video);
146 );
147
149 if (!ast_strlen_zero(args.max_size)) {
151 "jbmaxsize",
152 args.max_size);
153 }
154 if (!ast_strlen_zero(args.resync_threshold)) {
156 "jbresyncthreshold",
157 args.resync_threshold);
158 }
159 if (!ast_strlen_zero(args.target_extra)) {
161 "jbtargetextra",
162 args.target_extra);
163 }
164 if (!ast_strlen_zero(args.sync_video)) {
166 "jbsyncvideo",
167 args.sync_video);
168 }
169 if (res) {
170 ast_log(LOG_WARNING, "Invalid jitterbuffer parameters %s\n", value);
171 }
172 }
173
175
176 return 0;
177}
void ast_jb_create_framehook(struct ast_channel *chan, struct ast_jb_conf *jb_conf, int prefer_existing)
Applies a jitterbuffer framehook to a channel based on a provided jitterbuffer config.
Definition: abstract_jb.c:1267
void ast_jb_conf_default(struct ast_jb_conf *conf)
Sets the contents of an ast_jb_conf struct to the default jitterbuffer settings.
Definition: abstract_jb.c:890
int ast_jb_read_conf(struct ast_jb_conf *conf, const char *varname, const char *value)
Sets jitterbuffer configuration property.
Definition: abstract_jb.c:545
#define ast_strdupa(s)
duplicate a string in memory from the stack
Definition: astmm.h:298
#define ast_log
Definition: astobj2.c:42
#define AST_APP_ARG(name)
Define an application argument.
#define AST_DECLARE_APP_ARGS(name, arglist)
Declare a structure to hold an application's arguments.
#define AST_STANDARD_APP_ARGS(args, parse)
Performs the 'standard' argument separation process for an application.
#define LOG_WARNING
static force_inline int attribute_pure ast_strlen_zero(const char *s)
Definition: strings.h:65
void ast_copy_string(char *dst, const char *src, size_t size)
Size-limited null-terminating string copy.
Definition: strings.h:425
General jitterbuffer configuration.
Definition: abstract_jb.h:70
long target_extra
amount of additional jitterbuffer adjustment
Definition: abstract_jb.h:80
long max_size
Max size of the jitterbuffer implementation.
Definition: abstract_jb.h:74
long resync_threshold
Resynchronization threshold of the jitterbuffer implementation.
Definition: abstract_jb.h:76
int value
Definition: syslog.c:37
const char * args

References args, AST_APP_ARG, ast_copy_string(), AST_DECLARE_APP_ARGS, ast_jb_conf_default(), ast_jb_create_framehook(), ast_jb_read_conf(), ast_log, AST_STANDARD_APP_ARGS, ast_strdupa, ast_strlen_zero(), LOG_WARNING, ast_jb_conf::max_size, ast_jb_conf::resync_threshold, ast_jb_conf::target_extra, and value.

◆ load_module()

static int load_module ( void  )
static

Definition at line 190 of file func_jitterbuffer.c.

191{
194}
static struct ast_custom_function jb_function
@ 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
#define ast_custom_function_register(acf)
Register a custom function.
Definition: pbx.h:1558

References ast_custom_function_register, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, and jb_function.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 185 of file func_jitterbuffer.c.

186{
188}
int ast_custom_function_unregister(struct ast_custom_function *acf)
Unregister a custom function.

References ast_custom_function_unregister(), and jb_function.

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Jitter buffer for read side of channel." , .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_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
static

Definition at line 196 of file func_jitterbuffer.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 196 of file func_jitterbuffer.c.

◆ jb_function

struct ast_custom_function jb_function
static
Initial value:
= {
.name = "JITTERBUFFER",
.write = jb_helper,
}
static int jb_helper(struct ast_channel *chan, const char *cmd, char *data, const char *value)

Definition at line 180 of file func_jitterbuffer.c.

Referenced by load_module(), and unload_module().