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111 lines
3.9 KiB
111 lines
3.9 KiB
/* output_i2s_OA_f32.h
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*
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* This is Teensy Audio output_i2s.h altered to support OpenAudio float (F32)
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* to allow direct output of F32 blocks to the codec. It is the Teensy Audio output
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* class with a conversion of float to int16 at the beginning. Bob Larkin
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* June 2020
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*
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* This is basic: 128 word blocks, 16-bit integer word to the codec. It
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* needs to be revisited for variable word block.
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*
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* Tested: Using TestOutput_float.ino, Runs T3.6 and T4.0 w/o error.
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*
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* Additions under MIT license, and all the original is:
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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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#ifndef output_i2s_OA_F32_h_
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#define output_i2s_OA_F32_h_
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#include "Arduino.h"
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#include "AudioStream.h"
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#include "AudioStream_F32.h"
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#include "DMAChannel.h"
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class AudioOutputI2S_OA_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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AudioOutputI2S_OA_F32(void) : AudioStream_F32(2, inputQueueArray) {
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// Add 2 delays as experimental fix for possible Teensy Loader issue.
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uint32_t ii;
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uint32_t xx = 0;
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for (ii=0; ii<1000; ii++) xx += ii;
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begin();
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for (ii=0; ii<1000; ii++) xx += ii;
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}
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/* This long form needs to be added <<<<<<<<<<<<<<<<
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AudioOutputI2S_OA_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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*/
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virtual void update(void);
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void begin(void);
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friend class AudioInputI2S_OA_F32;
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/* These are 4, 6, and 8 channel options in I16 T4, not yet supported in F32
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#if defined(__IMXRT1062__)
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friend class AudioOutputI2SQuad;
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friend class AudioInputI2SQuad;
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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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*/
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protected:
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// Next fcn to be used only inside AudioOutputI2S_OA_F32slave !!
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AudioOutputI2S_OA_F32(int dummy): AudioStream_F32(2, inputQueueArray) {}
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static void config_i2s(void);
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static audio_block_t *block_left_1st;
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static audio_block_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(void);
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private:
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static audio_block_t *block_left_2nd;
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static audio_block_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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};
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class AudioOutputI2Sslave_OA_F32 : public AudioOutputI2S_OA_F32
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{
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public:
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AudioOutputI2Sslave_OA_F32(void) : AudioOutputI2S_OA_F32(0) { begin(); } ;
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void begin(void);
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friend class AudioInputI2Sslave_OA_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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