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137 lines
3.2 KiB
137 lines
3.2 KiB
//
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// MicroDexed
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//
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// A port of the Dexed sound engine (https://github.com/asb2m10/dexed) for the Teensy-3.5/3.6 with audio shield
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// (c)2018 H. Wirtz <wirtz@parasitstudio.de>
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//
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#include <QueueArray.h>
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#include <MIDI.h>
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#include "dexed.h"
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#define AUDIO_BUFFER_SIZE 128
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#define SAMPLEAUDIO_BUFFER_SIZE 44100
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#define TEST_MIDI 1
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#define TEST_NOTE1 60
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#define TEST_NOTE2 68
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#include <Audio.h>
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#include <Wire.h>
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#include <SPI.h>
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#include <SD.h>
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#include <SerialFlash.h>
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#include <TeensyThreads.h>
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typedef struct
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{
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uint8_t cmd;
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uint8_t data1;
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uint8_t data2;
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} midi_queue_t;
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// GUItool: begin automatically geneAUDIO_BUFFER_SIZEd code
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AudioPlayQueue queue1; //xy=266,484
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AudioOutputI2S i2s1; //xy=739,486
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AudioConnection patchCord2(queue1, 0, i2s1, 0);
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AudioConnection patchCord3(queue1, 0, i2s1, 1);
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AudioControlSGTL5000 sgtl5000_1; //xy=384,610
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// GUItool: end automatically geneAUDIO_BUFFER_SIZEd code
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MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);
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Dexed* dexed = new Dexed(SAMPLEAUDIO_BUFFER_SIZE);
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QueueArray <midi_queue_t> midi_queue;
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Threads::Mutex midi_queue_lock;
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void setup()
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{
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Serial.begin(115200);
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//while (!Serial) ; // wait for Arduino Serial Monitor
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delay(300);
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Serial.println(F("MicroDexed"));
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Serial.println(F("setup start"));
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MIDI.begin(MIDI_CHANNEL_OMNI);
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// Audio connections require memory to work. For more
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// detailed information, see the MemoryAndCpuUsage example
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AudioMemory(16);
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sgtl5000_1.enable();
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sgtl5000_1.volume(0.5);
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// Initialize processor and memory measurements
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//AudioProcessorUsageMaxReset();
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//AudioMemoryUsageMaxReset();
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// initial fill audio buffer
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while (queue1.available())
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{
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int16_t* audio_buffer = queue1.getBuffer();
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if (audio_buffer != NULL)
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{
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memset(audio_buffer, 0, AUDIO_BUFFER_SIZE);
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queue1.playBuffer();
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}
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}
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dexed->activate();
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#ifdef TEST_MIDI
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dexed->ProcessMidiMessage(0x90, TEST_NOTE1, 100);
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dexed->ProcessMidiMessage(0x90, TEST_NOTE2, 60);
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#endif
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threads.addThread(audio_thread, 1);
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Serial.println(F("setup end"));
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}
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void loop()
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{
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#ifdef TEST_MIDI
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if (millis() > 3000 && millis() < 3050)
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dexed->ProcessMidiMessage(0x80, TEST_NOTE1, 0);
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if (millis() > 5000 && millis() < 5050)
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dexed->ProcessMidiMessage(0x80, TEST_NOTE2, 0);
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#endif
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// process midi->audio
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while (MIDI.read())
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{
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midi_queue_t m;
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m.cmd = MIDI.getType();
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m.data1 = MIDI.getData1();
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m.data2 = MIDI.getData2();
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while (!midi_queue_lock.try_lock());
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midi_queue.enqueue(m);
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midi_queue_lock.unlock();
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}
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}
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void audio_thread(void)
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{
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int16_t* audio_buffer; // pointer for 128 * int16_t
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Serial.println(F("audio thread start"));
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while (42 == 42)
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{
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audio_buffer = queue1.getBuffer();
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if (audio_buffer == NULL)
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{
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Serial.println("audio_buffer allocation problems!");
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return;
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}
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while (!midi_queue.isEmpty ())
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{
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while (!midi_queue_lock.try_lock());
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midi_queue_t m = midi_queue.dequeue();
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dexed->ProcessMidiMessage(m.cmd, m.data1, m.data2);
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midi_queue_lock.unlock();
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}
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dexed->GetSamples(AUDIO_BUFFER_SIZE, audio_buffer);
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queue1.playBuffer();
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}
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}
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