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_module *	AST_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_info *	ast_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.

{
    struct ast_jb_conf jb_conf;
 
    if (!chan) {
        ast_log(LOG_WARNING, "No channel was provided to %s function.\n", cmd);
        return -1;
    }
 
    /* Initialize and set jb_conf */
    ast_jb_conf_default(&jb_conf);
 
    /* Now check user options to see if any of the defaults need to change. */
    if (!ast_strlen_zero(data)) {
        if (strcasecmp(data, "fixed") &&
                strcasecmp(data, "adaptive") &&
                strcasecmp(data, "disabled")) {
            ast_log(LOG_WARNING, "Unknown Jitterbuffer type %s. Failed to create jitterbuffer.\n", data);
            return -1;
        }
        ast_copy_string(jb_conf.impl, data, sizeof(jb_conf.impl));
    }
 
    if (!ast_strlen_zero(value) && strcasecmp(value, "default")) {
        char *parse = ast_strdupa(value);
        int res = 0;
        AST_DECLARE_APP_ARGS(args,
            AST_APP_ARG(max_size);
            AST_APP_ARG(resync_threshold);
            AST_APP_ARG(target_extra);
            AST_APP_ARG(sync_video);
        );
 
        AST_STANDARD_APP_ARGS(args, parse);
        if (!ast_strlen_zero(args.max_size)) {
            res |= ast_jb_read_conf(&jb_conf,
                "jbmaxsize",
                args.max_size);
        }
        if (!ast_strlen_zero(args.resync_threshold)) {
            res |= ast_jb_read_conf(&jb_conf,
                "jbresyncthreshold",
                args.resync_threshold);
        }
        if (!ast_strlen_zero(args.target_extra)) {
            res |= ast_jb_read_conf(&jb_conf,
                "jbtargetextra",
                args.target_extra);
        }
        if (!ast_strlen_zero(args.sync_video)) {
            res |= ast_jb_read_conf(&jb_conf,
                "jbsyncvideo",
                args.sync_video);
        }
        if (res) {
            ast_log(LOG_WARNING, "Invalid jitterbuffer parameters %s\n", value);
        }
    }
 
    ast_jb_create_framehook(chan, &jb_conf, 0);
 
    return 0;
}

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.

{
    int res = ast_custom_function_register(&jb_function);
    return res ? AST_MODULE_LOAD_DECLINE : AST_MODULE_LOAD_SUCCESS;
}

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.

{
    return ast_custom_function_unregister(&jb_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,
}

Definition at line 180 of file func_jitterbuffer.c.

Referenced by load_module(), and unload_module().