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58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (c) 2012 by Cristian Maglie <c.maglie@bug.st>
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* Audio library for Arduino Due.
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of either the GNU General Public License version 2
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* or the GNU Lesser General Public License version 2.1, both as
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* published by the Free Software Foundation.
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*/
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#ifndef AUDIO_H
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#define AUDIO_H
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#include "Arduino.h"
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#include "Print.h"
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#include "DAC.h"
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class AudioClass : public Print {
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public:
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AudioClass(DACClass &_dac) : dac(&_dac) { };
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void prepare(int16_t *buffer, int S, int volume);
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void begin(uint32_t sampleRate, uint32_t msPreBuffer);
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void end();
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virtual size_t write(uint8_t c) { /* not implemented */ };
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virtual size_t write(const uint8_t *data, size_t size) { return write(reinterpret_cast<const uint32_t*>(data), size/4) * 4; };
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virtual size_t write(const uint16_t *data, size_t size) { return write(reinterpret_cast<const uint32_t*>(data), size/2) * 2; };
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virtual size_t write(const int16_t *data, size_t size) { return write(reinterpret_cast<const uint32_t*>(data), size/2) * 2; };
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virtual size_t write(const uint32_t *data, size_t size);
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void debug() {
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// Serial1.print(running-buffer, DEC);
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// Serial1.print(" ");
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// Serial1.print(current-buffer, DEC);
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// Serial1.print(" ");
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// Serial1.print(next-buffer, DEC);
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// Serial1.print(" ");
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// Serial1.println(last-buffer, DEC);
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}
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private:
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void enqueue();
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static void onTransmitEnd(void *me);
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uint32_t bufferSize;
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uint32_t *buffer;
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uint32_t *half;
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uint32_t *last;
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uint32_t *volatile running;
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uint32_t *volatile next;
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uint32_t *cook(const uint32_t *buffer, size_t size);
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DACClass *dac;
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};
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extern AudioClass Audio;
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#endif
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