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Diffstat (limited to 'pjsip-apps/src/samples/tonegen.c')
| -rw-r--r-- | pjsip-apps/src/samples/tonegen.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/pjsip-apps/src/samples/tonegen.c b/pjsip-apps/src/samples/tonegen.c new file mode 100644 index 0000000..5190186 --- /dev/null +++ b/pjsip-apps/src/samples/tonegen.c @@ -0,0 +1,159 @@ +/* $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; +} |