166 lines
4.8 KiB
C
166 lines
4.8 KiB
C
/****************************************************************************
|
|
* apps/audioutils/fmsynth/test/opfunc_test.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
#include <limits.h>
|
|
|
|
#include <audioutils/fmsynth_op.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define FS (48000)
|
|
#define DUMP_PERIOD (FS * 3 / 2000)
|
|
#define ACCURACY_TEST_PERIOD (FS * 3)
|
|
|
|
#define HZ (4186)
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
static opfunc_t func_sin;
|
|
static opfunc_t func_tri;
|
|
static opfunc_t func_saw;
|
|
static opfunc_t func_sqa;
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* name: prepare_opfuncs
|
|
****************************************************************************/
|
|
|
|
static void prepare_opfuncs(void)
|
|
{
|
|
fmsynth_op_t *op;
|
|
|
|
op = fmsynthop_create();
|
|
|
|
fmsynthop_select_opfunc(op, FMSYNTH_OPFUNC_SIN);
|
|
func_sin = op->wavegen;
|
|
|
|
fmsynthop_select_opfunc(op, FMSYNTH_OPFUNC_TRIANGLE);
|
|
func_tri = op->wavegen;
|
|
|
|
fmsynthop_select_opfunc(op, FMSYNTH_OPFUNC_SAWTOOTH);
|
|
func_saw = op->wavegen;
|
|
|
|
fmsynthop_select_opfunc(op, FMSYNTH_OPFUNC_SQUARE);
|
|
func_sqa = op->wavegen;
|
|
|
|
fmsynthop_delete(op);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* name: wavegen_dump
|
|
****************************************************************************/
|
|
|
|
static void wavegen_dump(void)
|
|
{
|
|
int t;
|
|
float deltaact;
|
|
|
|
deltaact = (float)FMSYNTH_PI * 2. * (float)HZ / (float)FS;
|
|
|
|
printf("===== Wave generator Dump ====\n");
|
|
printf("SIN, TRIANGLE, SAWTOOTH, SQUARE\n");
|
|
for (t = 0; t < DUMP_PERIOD; t++)
|
|
{
|
|
printf("%d, %d, %d, %d\n",
|
|
func_sin((int)(deltaact * t)),
|
|
func_tri((int)(deltaact * t)),
|
|
func_saw((int)(deltaact * t)),
|
|
func_sqa((int)(deltaact * t))
|
|
);
|
|
}
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
/****************************************************************************
|
|
* name: sin_accuracy_test
|
|
****************************************************************************/
|
|
|
|
static void sin_accuracy_test(void)
|
|
{
|
|
int t;
|
|
float delta;
|
|
float deltaact;
|
|
float max_diff = 0.f;
|
|
float ref_sin;
|
|
int sin_val;
|
|
float norm_sin;
|
|
float diff;
|
|
|
|
delta = M_PI * 2. * (float)HZ / (float)FS;
|
|
deltaact = (float)FMSYNTH_PI * 2. * (float)HZ / (float)FS;
|
|
|
|
printf("===== Local SIN function ACCURACY TEST ====\n");
|
|
for (t = 0; t < ACCURACY_TEST_PERIOD; t++)
|
|
{
|
|
sin_val = func_sin((int)(deltaact * t));
|
|
ref_sin = sinf(delta * t);
|
|
|
|
norm_sin = (float)sin_val / (float)SHRT_MAX;
|
|
printf("t=%d, operator-sin(%d)=%d, norm_sin=%f, sinf(%f)=%f ",
|
|
t, (int)(deltaact * t), sin_val, norm_sin, delta * t, ref_sin);
|
|
|
|
diff = fabsf(norm_sin - ref_sin);
|
|
max_diff = max_diff < diff ? diff : max_diff;
|
|
|
|
if (diff >= 0.005)
|
|
{
|
|
printf(" BIG-DIFF : %f\n", diff);
|
|
}
|
|
else
|
|
{
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
printf("\n\nMAX DIFF = %f\n\n", max_diff);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* name: main
|
|
****************************************************************************/
|
|
|
|
int main(void)
|
|
{
|
|
prepare_opfuncs();
|
|
sin_accuracy_test();
|
|
wavegen_dump();
|
|
|
|
return 0;
|
|
}
|