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118 lines
4.4 KiB
118 lines
4.4 KiB
/*
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* ***** output_i2s_f32.h *****
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*
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* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* Extended by Chip Audette, OpenAudio, May 2019
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* Converted to F32 and to variable audio block length
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* The F32 conversion is under the MIT License. Use at your own risk.
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*/
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// Updated OpenAudio F32 with this version from Chip Audette's Tympan Library Jan 2021 RSL
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// Removed old commented out code. RSL 30 May 2022
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#ifndef output_i2s_f32_h_
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#define output_i2s_f32_h_
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#include <Arduino.h>
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#include <arm_math.h>
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#include "AudioStream_F32.h"
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#include "DMAChannel.h"
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class AudioOutputI2S_F32 : public AudioStream_F32
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{
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//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node
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public:
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//uses default AUDIO_SAMPLE_RATE and BLOCK_SIZE_SAMPLES from AudioStream.h:
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AudioOutputI2S_F32(void) : AudioStream_F32(2, inputQueueArray) { begin();}
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// Allow variable sample rate and block size:
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AudioOutputI2S_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray)
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{
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sample_rate_Hz = settings.sample_rate_Hz;
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audio_block_samples = settings.audio_block_samples;
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begin();
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}
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// outputScale is a gain control for both left and right. If set exactly
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// to 1.0f it is left as a pass-through.
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void setGain(float _oscale) {
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outputScale = _oscale;
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}
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virtual void update(void);
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void begin(void);
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void begin(bool);
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friend class AudioInputI2S_F32;
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friend class AudioInputI2S_F32;
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#if defined(__IMXRT1062__)
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friend class AudioOutputI2SQuad_F32;
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friend class AudioInputI2SQuad_F32;
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//friend class AudioOutputI2SHex;
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//friend class AudioInputI2SHex;
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//friend class AudioOutputI2SOct;
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//friend class AudioInputI2SOct;
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#endif
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static void scale_f32_to_i16( float32_t *p_f32, float32_t *p_i16, int len) ;
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static void scale_f32_to_i24( float32_t *p_f32, float32_t *p_i16, int len) ;
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static void scale_f32_to_i32( float32_t *p_f32, float32_t *p_i32, int len) ;
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static float setI2SFreq_T3(const float); // I2S clock for T3,x
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protected:
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AudioOutputI2S_F32(int dummy): AudioStream_F32(2, inputQueueArray) {} // to be used only inside AudioOutputI2Sslave !!
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static void config_i2s(void);
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static void config_i2s(bool);
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static void config_i2s(float);
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static void config_i2s(bool, float);
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static audio_block_f32_t *block_left_1st;
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static audio_block_f32_t *block_right_1st;
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static bool update_responsibility;
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static DMAChannel dma;
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static void isr_16(void);
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static void isr_32(void);
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static void isr(void);
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private:
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static audio_block_f32_t *block_left_2nd;
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static audio_block_f32_t *block_right_2nd;
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static uint16_t block_left_offset;
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static uint16_t block_right_offset;
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audio_block_f32_t *inputQueueArray[2];
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static float sample_rate_Hz;
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static int audio_block_samples;
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volatile uint8_t enabled = 1;
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float outputScale = 1.0f; // Quick volume control
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};
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class AudioOutputI2Sslave_F32 : public AudioOutputI2S_F32
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{
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public:
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AudioOutputI2Sslave_F32(void) : AudioOutputI2S_F32(0) { begin(); } ;
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void begin(void);
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friend class AudioInputI2Sslave_F32;
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friend void dma_ch0_isr(void);
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protected:
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static void config_i2s(void);
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};
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#endif
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