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/*
* SpanDSP - a series of DSP components for telephony
*
* dds_tests.c
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2003 Steve Underwood
*
* All rights reserved.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: dds_tests.c,v 1.10 2005/12/25 15:08:36 steveu Exp $
*/
/*! \file */
/*! \page dds_tests_page Direct digital synthesis tests
\section dds_tests_page_sec_1 What does it do?
???.
\section dds_tests_page_sec_2 How does it work?
???.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <memory.h>
#include <tgmath.h>
#include <audiofile.h>
#include <tiffio.h>
#include "spandsp.h"
#define OUTPUT_FILE_NAME "dds.wav"
#define OUTPUT_FILE_NAME_COMPLEX "complex_dds.wav"
int main(int argc, char *argv[])
{
int i;
uint32_t phase;
int32_t phase_inc;
int outframes;
complex_t camp;
int16_t buf[80000];
AFfilehandle outhandle;
AFfilesetup filesetup;
filesetup = afNewFileSetup();
if (filesetup == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup, AF_FILE_WAVE);
afInitChannels(filesetup, AF_DEFAULT_TRACK, 1);
outhandle = afOpenFile(OUTPUT_FILE_NAME, "w", filesetup);
if (outhandle == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot create wave file '%s'\n", OUTPUT_FILE_NAME);
exit(2);
}
phase = 0;
phase_inc = dds_phase_step(123.456789);
for (i = 0; i < 40000; i++)
buf[i] = alaw_to_linear(linear_to_alaw(dds(&phase, phase_inc)));
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
buf,
40000);
if (outframes != 40000)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
phase_inc = dds_phase_step(12.3456789);
for (i = 0; i < 40000; i++)
buf[i] = alaw_to_linear(linear_to_alaw(dds(&phase, phase_inc)));
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
buf,
40000);
if (outframes != 40000)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
phase_inc = dds_phase_step(2345.6789);
for (i = 0; i < 40000; i++)
buf[i] = alaw_to_linear(linear_to_alaw(dds(&phase, phase_inc)));
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
buf,
40000);
if (outframes != 40000)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
phase_inc = dds_phase_step(3456.789);
for (i = 0; i < 40000; i++)
buf[i] = alaw_to_linear(linear_to_alaw(dds(&phase, phase_inc)));
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
buf,
40000);
if (outframes != 40000)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
if (afCloseFile(outhandle) != 0)
{
fprintf(stderr, " Cannot close wave file '%s'\n", OUTPUT_FILE_NAME);
exit(2);
}
afFreeFileSetup(filesetup);
filesetup = afNewFileSetup();
if (filesetup == AF_NULL_FILESETUP)
{
fprintf(stderr, " Failed to create file setup\n");
exit(2);
}
afInitSampleFormat(filesetup, AF_DEFAULT_TRACK, AF_SAMPFMT_TWOSCOMP, 16);
afInitRate(filesetup, AF_DEFAULT_TRACK, (float) SAMPLE_RATE);
afInitFileFormat(filesetup, AF_FILE_WAVE);
afInitChannels(filesetup, AF_DEFAULT_TRACK, 2);
outhandle = afOpenFile(OUTPUT_FILE_NAME_COMPLEX, "w", filesetup);
if (outhandle == AF_NULL_FILEHANDLE)
{
fprintf(stderr, " Cannot create wave file '%s'\n", OUTPUT_FILE_NAME_COMPLEX);
exit(2);
}
phase_inc = dds_phase_stepf(123.456789);
for (i = 0; i < 40000; i++)
{
camp = dds_complexf(&phase, phase_inc);
buf[2*i] = camp.re*10000.0;
buf[2*i + 1] = camp.im*10000.0;
}
outframes = afWriteFrames(outhandle,
AF_DEFAULT_TRACK,
buf,
40000);
if (outframes != 40000)
{
fprintf(stderr, " Error writing wave file\n");
exit(2);
}
if (afCloseFile(outhandle) != 0)
{
fprintf(stderr, " Cannot close wave file '%s'\n", OUTPUT_FILE_NAME_COMPLEX);
exit(2);
}
afFreeFileSetup(filesetup);
return 0;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
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