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OpenAudio_ArduinoLibrary/USB_Audio_F32.h

146 lines
5.0 KiB

/*
* USB_Audio_F32
*
* Created: Chip Audette (OpenAudio), Mar 2017
* Float32 wrapper for the Audio USB classes from the Teensy Audio Library
*
* License: MIT License. Use at your own risk.
*/
#ifndef usb_audio_f32_h_
#define usb_audio_f32_h_
//#include "Arduino.h"
#include <AudioStream_F32.h>
#include <Audio.h>
class AudioInputUSB_F32 : public AudioStream_F32
{
//GUI: inputs:0, outputs:2 //this line used for automatic generation of GUI node
//GUI: shortName:usbAudioIn //this line used for automatic generation of GUI node
public:
AudioInputUSB_F32() : AudioStream_F32(0, NULL) {
//i16_to_f32.disconnectFromUpdateAll(); //requires modification to AudioStream.h
//output_queue.disconnectFromUpdateAll(); //requires modification to AudioStream.h
makeConnections();
}
AudioInputUSB_F32(const AudioSettings_F32 &settings) : AudioStream_F32(0, NULL) {
//i16_to_f32.disconnectFromUpdateAll(); //requires modification to AudioStream.h
//output_queue.disconnectFromUpdateAll(); //requires modification to AudioStream.h
makeConnections();
}
void makeConnections(void) {
//make the audio connections
patchCord100_L = new AudioConnection(usb_in, 0, i16_to_f32_L, 0); //usb_in is an Int16 audio object. So, convert it!
patchCord100_R = new AudioConnection(usb_in, 1, i16_to_f32_R, 0); //usb_in is an Int16 audio object. So, convert it!
patchCord101_L = new AudioConnection_F32(i16_to_f32_L, 0, output_queue_L, 0);
patchCord101_R = new AudioConnection_F32(i16_to_f32_R, 0, output_queue_R, 0);
}
//define audio processing blocks.
AudioInputUSB usb_in; //from the original Teensy Audio Library, expects Int16 audio data
AudioConvert_I16toF32 i16_to_f32_L, i16_to_f32_R;
AudioRecordQueue_F32 output_queue_L,output_queue_R;
//define the audio connections
AudioConnection *patchCord100_L, *patchCord100_R;
AudioConnection_F32 *patchCord101_L, *patchCord101_R;
void update(void) {
//Serial.println("AudioSynthNoiseWhite_F32: update().");
output_queue_L.begin();
output_queue_R.begin();
//manually update audio blocks in the desired order
usb_in.update(); //the output should be routed directly via the AudioConnection
i16_to_f32_L.update(); // output is routed via the AudioConnection
i16_to_f32_R.update(); // output is routed via the AudioConnection
output_queue_L.update();
output_queue_R.update();
//handle the output for the left channel
audio_block_f32_t *block;
block = output_queue_L.getAudioBlock();
if (block == NULL) return;
AudioStream_F32::transmit(block,0);
output_queue_L.freeAudioBlock();
output_queue_L.end();
//handle the output for the left channel
block = output_queue_R.getAudioBlock();
if (block == NULL) return;
AudioStream_F32::transmit(block,1);
output_queue_R.freeAudioBlock();
output_queue_R.end();
}
private:
};
class AudioOutputUSB_F32 : public AudioStream_F32
{
//GUI: inputs:2, outputs:0 //this line used for automatic generation of GUI node
//GUI: shortName:usbAudioOut //this line used for automatic generation of GUI node
public:
AudioOutputUSB_F32() : AudioStream_F32(2, inputQueueArray_f32) {
makeConnections();
}
AudioOutputUSB_F32(const AudioSettings_F32 &settings) : AudioStream_F32(2, inputQueueArray_f32) {
makeConnections();
}
void makeConnections(void) {
//make the audio connections
patchCord100_L = new AudioConnection_F32(queue_L, 0, f32_to_i16_L, 0); //noise is an Int16 audio object. So, convert it!
patchCord100_R = new AudioConnection_F32(queue_R, 0, f32_to_i16_R, 0); //noise is an Int16 audio object. So, convert it!
patchCord101_L = new AudioConnection(f32_to_i16_L, 0, usb_out, 0); //Int16 audio connection
patchCord101_R = new AudioConnection(f32_to_i16_R, 0, usb_out, 1); //Int16 audio connection
}
//define audio processing blocks.
AudioPlayQueue_F32 queue_L,queue_R;
AudioConvert_F32toI16 f32_to_i16_L, f32_to_i16_R;
AudioOutputUSB usb_out; //from the original Teensy Audio Library, expects Int16 audio data
//define the audio connections
AudioConnection_F32 *patchCord100_L, *patchCord100_R;
AudioConnection *patchCord101_L, *patchCord101_R;
void update(void) {
//Serial.println("AudioSynthNoiseWhite_F32: update().");
//queue_L.begin();
//queue_R.begin();
//is there audio waiting for us for the left channel?
audio_block_f32_t *block;
block = receiveReadOnly_f32(0);
if (!block) return; //if no audio, return now.
//there is some audio, so execute the processing chain for the left channel
queue_L.playAudioBlock(block);
AudioStream_F32::release(block);
queue_L.update();
f32_to_i16_L.update();
//see if there is a right channel
block = receiveReadOnly_f32(1);
if (block) {
//there is a right channel. process it now
queue_R.playAudioBlock(block);
AudioStream_F32::release(block);
queue_R.update();
f32_to_i16_R.update();
}
//whether or not there was right-channel audio, update the usb_out
usb_out.update();
return;
}
private:
audio_block_f32_t *inputQueueArray_f32[2];
};
#endif