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104 lines
3.8 KiB
104 lines
3.8 KiB
/*
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* BAAudioEffectDelayExternal.h
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*
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* Created on: Nov 5, 2017
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* Author: slascos
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*/
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#ifndef __BAGUITAR_BAAUDIOEFFECTDELAYEXTERNAL_H
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#define __BAGUITAR_BAAUDIOEFFECTDELAYEXTERNAL_H
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#include <Audio.h>
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namespace BAGuitar {
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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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#include "Arduino.h"
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#include "AudioStream.h"
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#include "spi_interrupt.h"
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enum BAAudioEffectDelayMemoryType_t {
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BA_AUDIO_MEMORY_23LC1024 = 0, // 128k x 8 S-RAM
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BA_AUDIO_MEMORY_MEMORYBOARD = 1,
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BA_AUDIO_MEMORY_CY15B104 = 2, // 512k x 8 F-RAM
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BA_AUDIO_MEMORY_UNDEFINED = 3
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};
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class BAAudioEffectDelayExternal : public AudioStream
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{
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public:
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BAAudioEffectDelayExternal() : AudioStream(1, inputQueueArray) {
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initialize(BA_AUDIO_MEMORY_23LC1024, 65536);
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}
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BAAudioEffectDelayExternal(BAAudioEffectDelayMemoryType_t type, float milliseconds=1e6)
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: AudioStream(1, inputQueueArray) {
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uint32_t n = (milliseconds*(AUDIO_SAMPLE_RATE_EXACT/1000.0f))+0.5f;
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initialize(type, n);
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}
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void delay(uint8_t channel, float milliseconds) {
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if (channel >= 8 || memory_type >= BA_AUDIO_MEMORY_UNDEFINED) return;
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if (milliseconds < 0.0) milliseconds = 0.0;
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uint32_t n = (milliseconds*(AUDIO_SAMPLE_RATE_EXACT/1000.0f))+0.5f;
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n += AUDIO_BLOCK_SAMPLES;
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if (n > memory_length - AUDIO_BLOCK_SAMPLES)
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n = memory_length - AUDIO_BLOCK_SAMPLES;
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delay_length[channel] = n;
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uint8_t mask = activemask;
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if (activemask == 0) AudioStartUsingSPI();
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activemask = mask | (1<<channel);
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}
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void disable(uint8_t channel) {
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if (channel >= 8) return;
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uint8_t mask = activemask & ~(1<<channel);
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activemask = mask;
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if (mask == 0) AudioStopUsingSPI();
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}
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virtual void update(void);
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private:
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void initialize(BAAudioEffectDelayMemoryType_t type, uint32_t samples);
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void read(uint32_t address, uint32_t count, int16_t *data);
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void write(uint32_t address, uint32_t count, const int16_t *data);
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void zero(uint32_t address, uint32_t count) {
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write(address, count, NULL);
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}
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uint32_t memory_begin; // the first address in the memory we're using
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uint32_t memory_length; // the amount of memory we're using
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uint32_t head_offset; // head index (incoming) data into external memory
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uint32_t delay_length[8]; // # of sample delay for each channel (128 = no delay)
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uint8_t activemask; // which output channels are active
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uint8_t memory_type; // 0=23LC1024, 1=Frank's Memoryboard
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static uint32_t allocated[2];
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audio_block_t *inputQueueArray[1];
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};
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} /* namespace BAGuitar */
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#endif /* __BAGUITAR_BAAUDIOEFFECTDELAYEXTERNAL_H */
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