MicroDexed is a compatible 6-operator-FM-synth based on the Teensy(-3.6/-4.x) Microcontroller. https://www.parasitstudio.de
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/*
Copyright 2012 Google Inc.
Licensed 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.
*/
#ifndef __SYNTH_H
#define __SYNTH_H
//#include <Arduino.h>
//#define SUPER_PRECISE
#include <Audio.h>
// This IS not be present on MSVC.
// See http://stackoverflow.com/questions/126279/c99-stdint-h-header-and-ms-visual-studio
#include <stdint.h>
#ifdef _MSC_VER
typedef __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef __int16 SInt16;
#endif
#define LG_N 6
#define _N_ (1 << LG_N)
#if defined(__APPLE__)
#include <libkern/OSAtomic.h>
#define SynthMemoryBarrier() OSMemoryBarrier()
#elif defined(__GNUC__)
#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)
#define SynthMemoryBarrier() __sync_synchronize()
#endif
#endif
// #undef SynthMemoryBarrier()
#ifndef SynthMemoryBarrier
// need to understand why this must be defined
// #warning Memory barrier is not enabled
#define SynthMemoryBarrier()
#endif
template<typename T>
inline static T min(const T& a, const T& b) {
return a < b ? a : b;
}
template<typename T>
inline static T max(const T& a, const T& b) {
return a > b ? a : b;
}
#define QER(n,b) ( ((float)n)/(1<<b) )
#define FRAC_NUM float
#define SIN_FUNC sinf
// #define SIN_FUNC arm_sin_f32 // very fast but not as accurate
#define COS_FUNC cosf
// #define COS_FUNC arm_cos_f32 // very fast but not as accurate
#define LOG_FUNC logf
#define EXP_FUNC expf
#define SQRT_FUNC sqrtf
// #define ARM_SQRT_FUNC arm_sqrt_f32 // fast but not as accurate
#endif // __SYNTH_H