You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
2.5 KiB
87 lines
2.5 KiB
/*
|
|
Copyright (c) 2019, Holger Wirtz
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
*/
|
|
|
|
#include <Arduino.h>
|
|
#include <Audio.h>
|
|
#include "effect_mono2stereo.h"
|
|
|
|
/*************************************************************************/
|
|
// A u d i o E f f e c t M o n o 2 S t e r e o
|
|
// Written by Holger Wirtz
|
|
// 20191122 - initial version
|
|
|
|
#if !defined(_MAPFLOAT)
|
|
#define _MAPFLOAT
|
|
inline float mapfloat(float val, float in_min, float in_max, float out_min, float out_max)
|
|
{
|
|
return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
|
|
}
|
|
#endif
|
|
|
|
void Mono2Stereo::update(void)
|
|
{
|
|
audio_block_t *in;
|
|
audio_block_t *mod;
|
|
audio_block_t *out[2];
|
|
|
|
in = receiveReadOnly(0);
|
|
mod = receiveReadOnly(1);
|
|
|
|
out[0] = allocate();
|
|
out[1] = allocate();
|
|
|
|
if (in && mod && out[0] && out[1])
|
|
{
|
|
int16_t *ip = in->data;
|
|
int16_t *modp = mod->data;
|
|
int16_t *op[2] = { out[0]->data, out[1]->data };
|
|
|
|
for (uint16_t i = 0; i < AUDIO_BLOCK_SAMPLES; i++)
|
|
{
|
|
mapfloat(*modp, -1.0, 1.0, 0.0, 1.0);
|
|
float f_l = _pseudo_log * sinf(*modp * PI / 2); // _Pan [L0.0 ... M0.5 ... 1.0R]
|
|
float f_r = _pseudo_log * cosf(*modp * PI / 2);
|
|
*op[0]++ = int16_t(f_l * (*ip));
|
|
*op[1]++ = int16_t(f_r * (*ip++));
|
|
//op[0]++;
|
|
//op[1]++;
|
|
mod++;
|
|
}
|
|
|
|
if (in)
|
|
{
|
|
release(in);
|
|
}
|
|
if (mod)
|
|
{
|
|
release(mod);
|
|
}
|
|
for (uint8_t i = 0; i < 2; i++)
|
|
{
|
|
if (out[i])
|
|
{
|
|
transmit(out[i], i);
|
|
release(out[i]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|