| /* $Id$ */ |
| /* |
| * 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) { |
| pj_size_t 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; |
| } |