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/* $Id: tonegen.c 3553 2011-05-05 06:14:19Z nanang $ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
* \page page_pjmedia_samples_tonegen_c Samples: Sine Wave/Dual-Tone Generation
*
* This is a simple program to generate a tone and write the samples to
* a raw PCM file. The main purpose of this file is to analyze the
* quality of the tones/sine wave generated by PJMEDIA tone/sine wave
* generator.
*
* This file is pjsip-apps/src/samples/tonegen.c
*
* \includelineno tonegen.c
*/
#include <pjmedia.h>
#include <pjlib.h>
#define SAMPLES_PER_FRAME 64
#define ON_DURATION 100
#define OFF_DURATION 100
/*
* main()
*/
int main()
{
pj_caching_pool cp;
pjmedia_endpt *med_endpt;
pj_pool_t *pool;
pjmedia_port *port;
unsigned i;
pj_status_t status;
/* Must init PJLIB first: */
status = pj_init();
PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
/* Must create a pool factory before we can allocate any memory. */
pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);
/*
* Initialize media endpoint.
* This will implicitly initialize PJMEDIA too.
*/
status = pjmedia_endpt_create(&cp.factory, NULL, 1, &med_endpt);
PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
/* Create memory pool for our file player */
pool = pj_pool_create( &cp.factory, /* pool factory */
"app", /* pool name. */
4000, /* init size */
4000, /* increment size */
NULL /* callback on error */
);
status = pjmedia_tonegen_create(pool, 8000, 1, SAMPLES_PER_FRAME, 16, 0, &port);
if (status != PJ_SUCCESS)
return 1;
{
pjmedia_tone_desc tones[3];
tones[0].freq1 = 200;
tones[0].freq2 = 0;
tones[0].on_msec = ON_DURATION;
tones[0].off_msec = OFF_DURATION;
tones[1].freq1 = 400;
tones[1].freq2 = 0;
tones[1].on_msec = ON_DURATION;
tones[1].off_msec = OFF_DURATION;
tones[2].freq1 = 800;
tones[2].freq2 = 0;
tones[2].on_msec = ON_DURATION;
tones[2].off_msec = OFF_DURATION;
status = pjmedia_tonegen_play(port, 3, tones, 0);
PJ_ASSERT_RETURN(status==PJ_SUCCESS, 1);
}
{
pjmedia_tone_digit digits[2];
digits[0].digit = '0';
digits[0].on_msec = ON_DURATION;
digits[0].off_msec = OFF_DURATION;
digits[1].digit = '0';
digits[1].on_msec = ON_DURATION;
digits[1].off_msec = OFF_DURATION;
status = pjmedia_tonegen_play_digits(port, 2, digits, 0);
PJ_ASSERT_RETURN(status==PJ_SUCCESS, 1);
}
{
pjmedia_frame frm;
FILE *f;
void *buf;
buf = pj_pool_alloc(pool, 2*8000);
frm.buf = buf;
f = fopen("tonegen.pcm", "wb");
for (i=0; i<8000/SAMPLES_PER_FRAME; ++i) {
int count;
pjmedia_port_get_frame(port, &frm);
count = fwrite(buf, SAMPLES_PER_FRAME, 2, f);
if (count != 2)
break;
}
pj_assert(pjmedia_tonegen_is_busy(port) == 0);
fclose(f);
}
/* Delete port */
pjmedia_port_destroy(port);
/* Release application pool */
pj_pool_release( pool );
/* Destroy media endpoint. */
pjmedia_endpt_destroy( med_endpt );
/* Destroy pool factory */
pj_caching_pool_destroy( &cp );
/* Shutdown PJLIB */
pj_shutdown();
/* Done. */
return 0;
}
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