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/*
* Copyright 2009 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.devices.jportaudio;
import com.jsyn.devices.AudioDeviceInputStream;
import com.jsyn.devices.AudioDeviceManager;
import com.jsyn.devices.AudioDeviceOutputStream;
import com.portaudio.BlockingStream;
import com.portaudio.DeviceInfo;
import com.portaudio.HostApiInfo;
import com.portaudio.PortAudio;
import com.portaudio.StreamParameters;
public class JPortAudioDevice implements AudioDeviceManager {
private double suggestedOutputLatency = 0.030;
private double suggestedInputLatency = 0.050;
private static final int FRAMES_PER_BUFFER = 128;
// static Logger logger = Logger.getLogger( JPortAudioDevice.class.getName() );
public JPortAudioDevice() {
PortAudio.initialize();
}
@Override
public int getDeviceCount() {
return PortAudio.getDeviceCount();
}
@Override
public String getDeviceName(int deviceID) {
DeviceInfo deviceInfo = PortAudio.getDeviceInfo(deviceID);
HostApiInfo hostInfo = PortAudio.getHostApiInfo(deviceInfo.hostApi);
return deviceInfo.name + " - " + hostInfo.name;
}
@Override
public int getDefaultInputDeviceID() {
return PortAudio.getDefaultInputDevice();
}
@Override
public int getDefaultOutputDeviceID() {
return PortAudio.getDefaultOutputDevice();
}
@Override
public int getMaxInputChannels(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultInputDevice();
}
return PortAudio.getDeviceInfo(deviceID).maxInputChannels;
}
@Override
public int getMaxOutputChannels(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultOutputDevice();
}
return PortAudio.getDeviceInfo(deviceID).maxOutputChannels;
}
@Override
public double getDefaultLowInputLatency(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultInputDevice();
}
return PortAudio.getDeviceInfo(deviceID).defaultLowInputLatency;
}
@Override
public double getDefaultHighInputLatency(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultInputDevice();
}
return PortAudio.getDeviceInfo(deviceID).defaultHighInputLatency;
}
@Override
public double getDefaultLowOutputLatency(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultOutputDevice();
}
return PortAudio.getDeviceInfo(deviceID).defaultLowOutputLatency;
}
@Override
public double getDefaultHighOutputLatency(int deviceID) {
if (deviceID < 0) {
deviceID = PortAudio.getDefaultOutputDevice();
}
return PortAudio.getDeviceInfo(deviceID).defaultHighOutputLatency;
}
@Override
public int setSuggestedOutputLatency(double latency) {
suggestedOutputLatency = latency;
return 0;
}
@Override
public int setSuggestedInputLatency(double latency) {
suggestedInputLatency = latency;
return 0;
}
@Override
public AudioDeviceOutputStream createOutputStream(int deviceID, int frameRate,
int samplesPerFrame) {
return new JPAOutputStream(deviceID, frameRate, samplesPerFrame);
}
@Override
public AudioDeviceInputStream createInputStream(int deviceID, int frameRate, int samplesPerFrame) {
return new JPAInputStream(deviceID, frameRate, samplesPerFrame);
}
private class JPAStream {
BlockingStream blockingStream;
float[] floatBuffer = null;
int samplesPerFrame;
public void close() {
blockingStream.close();
}
public void start() {
blockingStream.start();
}
public void stop() {
blockingStream.stop();
}
}
private class JPAOutputStream extends JPAStream implements AudioDeviceOutputStream {
private JPAOutputStream(int deviceID, int frameRate, int samplesPerFrame) {
this.samplesPerFrame = samplesPerFrame;
StreamParameters streamParameters = new StreamParameters();
streamParameters.channelCount = samplesPerFrame;
if (deviceID < 0) {
deviceID = PortAudio.getDefaultOutputDevice();
}
streamParameters.device = deviceID;
streamParameters.suggestedLatency = suggestedOutputLatency;
int flags = 0;
System.out.println("Audio output on " + getDeviceName(deviceID));
blockingStream = PortAudio.openStream(null, streamParameters, frameRate,
FRAMES_PER_BUFFER, flags);
}
/** Grossly inefficient. Call the array version instead. */
@Override
public void write(double value) {
double[] buffer = new double[1];
buffer[0] = value;
write(buffer, 0, 1);
}
@Override
public void write(double[] buffer) {
write(buffer, 0, buffer.length);
}
@Override
public void write(double[] buffer, int start, int count) {
// Allocate float buffer if needed.
if ((floatBuffer == null) || (floatBuffer.length < count)) {
floatBuffer = new float[count];
}
for (int i = 0; i < count; i++) {
floatBuffer[i] = (float) buffer[i + start];
}
blockingStream.write(floatBuffer, count / samplesPerFrame);
}
@Override
public double getLatency() {
return blockingStream.getInfo().outputLatency;
}
}
private class JPAInputStream extends JPAStream implements AudioDeviceInputStream {
private JPAInputStream(int deviceID, int frameRate, int samplesPerFrame) {
this.samplesPerFrame = samplesPerFrame;
StreamParameters streamParameters = new StreamParameters();
streamParameters.channelCount = samplesPerFrame;
if (deviceID < 0) {
deviceID = PortAudio.getDefaultInputDevice();
}
streamParameters.device = deviceID;
streamParameters.suggestedLatency = suggestedInputLatency;
int flags = 0;
System.out.println("Audio input from " + getDeviceName(deviceID));
blockingStream = PortAudio.openStream(streamParameters, null, frameRate,
FRAMES_PER_BUFFER, flags);
}
@Override
public double read() {
double[] buffer = new double[1];
read(buffer, 0, 1);
return buffer[0];
}
@Override
public int read(double[] buffer) {
return read(buffer, 0, buffer.length);
}
@Override
public int read(double[] buffer, int start, int count) {
// Allocate float buffer if needed.
if ((floatBuffer == null) || (floatBuffer.length < count)) {
floatBuffer = new float[count];
}
blockingStream.read(floatBuffer, count / samplesPerFrame);
for (int i = 0; i < count; i++) {
buffer[i + start] = floatBuffer[i];
}
return count;
}
@Override
public double getLatency() {
return blockingStream.getInfo().inputLatency;
}
@Override
public int available() {
return blockingStream.getReadAvailable() * samplesPerFrame;
}
}
@Override
public String getName() {
return "JPortAudio";
}
}
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