app_echo.c File Reference

Echo application – play back what you hear to evaluate latency. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/module.h"
#include "asterisk/channel.h"

Include dependency graph for app_echo.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	echo_exec (struct ast_channel *chan, const char *data)
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 = "Simple Echo Application" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, .support_level = AST_MODULE_SUPPORT_CORE, }
static const char	app [] = "Echo"
static const struct ast_module_info *	ast_module_info = &__mod_info

Detailed Description

Echo application – play back what you hear to evaluate latency.

Author

Mark Spencer marks.nosp@m.ter@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

Definition in file app_echo.c.

Function Documentation

__reg_module()

static void __reg_module ( void  )

static

Definition at line 116 of file app_echo.c.

__unreg_module()

static void __unreg_module ( void  )

static

Definition at line 116 of file app_echo.c.

AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM

(

void

)

Definition at line 116 of file app_echo.c.

echo_exec()

static int echo_exec ( struct ast_channel *  chan, const char *  data  )

static

Definition at line 59 of file app_echo.c.

{
    int res = -1;
    int fir_sent = 0;
 
    while (ast_waitfor(chan, -1) > -1) {
        struct ast_frame *f = ast_read(chan);
        if (!f) {
            break;
        }
        f->delivery.tv_sec = 0;
        f->delivery.tv_usec = 0;
        if (f->frametype == AST_FRAME_CONTROL
            && f->subclass.integer == AST_CONTROL_VIDUPDATE
            && !fir_sent) {
            if (ast_write(chan, f) < 0) {
                ast_frfree(f);
                goto end;
            }
            fir_sent = 1;
        }
        if (!fir_sent && f->frametype == AST_FRAME_VIDEO) {
            struct ast_frame frame = {
                .frametype = AST_FRAME_CONTROL,
                .subclass.integer = AST_CONTROL_VIDUPDATE,
            };
            ast_write(chan, &frame);
            fir_sent = 1;
        }
        if (f->frametype != AST_FRAME_CONTROL
            && f->frametype != AST_FRAME_MODEM
            && f->frametype != AST_FRAME_NULL
            && ast_write(chan, f)) {
            ast_frfree(f);
            goto end;
        }
        if ((f->frametype == AST_FRAME_DTMF) && (f->subclass.integer == '#')) {
            res = 0;
            ast_frfree(f);
            goto end;
        }
        ast_frfree(f);
    }
end:
    return res;
}

References AST_CONTROL_VIDUPDATE, AST_FRAME_CONTROL, AST_FRAME_DTMF, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_VIDEO, ast_frfree, ast_read(), ast_waitfor(), ast_write(), ast_frame::delivery, end, ast_frame::frametype, ast_frame_subclass::integer, and ast_frame::subclass.

Referenced by load_module().

load_module()

static int load_module ( void  )

static

Definition at line 111 of file app_echo.c.

{
    return ast_register_application_xml(app, echo_exec);
}

References app, ast_register_application_xml, and echo_exec().

unload_module()

static int unload_module ( void  )

static

Definition at line 106 of file app_echo.c.

{
    return ast_unregister_application(app);
}

References app, and ast_unregister_application().

Variable Documentation

__mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Simple Echo Application" , .key = ASTERISK_GPL_KEY , .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 116 of file app_echo.c.

app

const char app[] = "Echo"

static

Definition at line 57 of file app_echo.c.

Referenced by load_module(), and unload_module().

ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info

static

Definition at line 116 of file app_echo.c.