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OpenAudio_ArduinoLibrary/output_i2s_OA_f32.h

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/* output_i2s_OA_f32.h
*
* This is Teensy Audio output_i2s.h altered to support OpenAudio float (F32)
* to allow direct output of F32 blocks to the codec. It is the Teensy Audio output
* class with a conversion of float to int16 at the beginning. Bob Larkin
* June 2020
*
* This is basic: 128 word blocks, 16-bit integer word to the codec. It
* needs to be revisited for variable word block.
*
* Tested: Using TestOutput_float.ino, Runs T3.6 and T4.0 w/o error.
*
* Additions under MIT license, and all the original is:
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* 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, development funding 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.
*/
#ifndef output_i2s_OA_F32_h_
#define output_i2s_OA_F32_h_
#include "Arduino.h"
#include "AudioStream.h"
#include "AudioStream_F32.h"
#include "DMAChannel.h"
class AudioOutputI2S_OA_F32 : public AudioStream_F32
{
//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node
public:
AudioOutputI2S_OA_F32(void) : AudioStream_F32(2, inputQueueArray) {
// begin(); // <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
}
/* This long form needs to be added <<<<<<<<<<<<<<<<
AudioOutputI2S_OA_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray)
{
sample_rate_Hz = settings.sample_rate_Hz;
audio_block_samples = settings.audio_block_samples;
begin();
}
*/
virtual void update(void);
void begin(void);
friend class AudioInputI2S_OA_F32;
/* These are 4, 6, and 8 channel options in I16 T4, not yet supported in F32
#if defined(__IMXRT1062__)
friend class AudioOutputI2SQuad;
friend class AudioInputI2SQuad;
friend class AudioOutputI2SHex;
friend class AudioInputI2SHex;
friend class AudioOutputI2SOct;
friend class AudioInputI2SOct;
#endif
*/
protected:
// Next fcn to be used only inside AudioOutputI2S_OA_F32slave !!
AudioOutputI2S_OA_F32(int dummy): AudioStream_F32(2, inputQueueArray) {}
static void config_i2s(void);
static audio_block_t *block_left_1st;
static audio_block_t *block_right_1st;
static bool update_responsibility;
static DMAChannel dma;
static void isr(void);
private:
static audio_block_t *block_left_2nd;
static audio_block_t *block_right_2nd;
static uint16_t block_left_offset;
static uint16_t block_right_offset;
audio_block_f32_t *inputQueueArray[2];
};
class AudioOutputI2Sslave_OA_F32 : public AudioOutputI2S_OA_F32
{
public:
AudioOutputI2Sslave_OA_F32(void) : AudioOutputI2S_OA_F32(0) { begin(); } ;
void begin(void);
friend class AudioInputI2Sslave_OA_F32;
friend void dma_ch0_isr(void);
protected:
static void config_i2s(void);
};
#endif