diff options
Diffstat (limited to 'android/com/jsyn/devices')
-rw-r--r-- | android/com/jsyn/devices/android/AndroidAudioForJSyn.java | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/android/com/jsyn/devices/android/AndroidAudioForJSyn.java b/android/com/jsyn/devices/android/AndroidAudioForJSyn.java new file mode 100644 index 0000000..3aba1e4 --- /dev/null +++ b/android/com/jsyn/devices/android/AndroidAudioForJSyn.java @@ -0,0 +1,201 @@ +/* + * Copyright 2010 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.android; +import java.util.ArrayList; +import android.os.Process; +import android.media.AudioFormat; +import android.media.AudioManager; +import android.media.AudioTrack; +import com.jsyn.devices.AudioDeviceManager; +import com.jsyn.devices.AudioDeviceInputStream; +import com.jsyn.devices.AudioDeviceOutputStream; +/** + * Implement JSyn's AudioDeviceManager. Use Android AudioTrack to access the + * audio hardware. + */ +public class AndroidAudioForJSyn implements AudioDeviceManager { + ArrayList<DeviceInfo> deviceRecords; + private double suggestedOutputLatency = 0.100; + private double suggestedInputLatency = 0.100; + private int defaultInputDeviceID = -1; + private int defaultOutputDeviceID = -1; + public AndroidAudioForJSyn() { + deviceRecords = new ArrayList<DeviceInfo>(); + DeviceInfo deviceInfo = new DeviceInfo(); + deviceInfo.name = "Android Audio"; + deviceInfo.maxInputs = 0; + deviceInfo.maxOutputs = 2; + defaultInputDeviceID = 0; + defaultOutputDeviceID = 0; + deviceRecords.add(deviceInfo); + } + public String getName() { + return "JSyn Android Audio"; + } + class DeviceInfo { + String name; + int maxInputs; + int maxOutputs; + public String toString() { + return "AudioDevice: " + name + ", max in = " + maxInputs + + ", max out = " + maxOutputs; + } + } + private class AndroidAudioStream { + float[] floatBuffer; + int frameRate; + int deviceID; + int samplesPerFrame; + AudioTrack audioTrack; + int minBufferSize; + int bufferSize; + public AndroidAudioStream(int deviceID, int frameRate, + int samplesPerFrame) { + this.deviceID = deviceID; + this.frameRate = frameRate; + this.samplesPerFrame = samplesPerFrame; + } + public double getLatency() { + int numFrames = bufferSize / samplesPerFrame; + return ((double) numFrames) / frameRate; + } + } + private class AndroidAudioOutputStream extends AndroidAudioStream implements + AudioDeviceOutputStream { + public AndroidAudioOutputStream(int deviceID, int frameRate, + int samplesPerFrame) { + super(deviceID, frameRate, samplesPerFrame); + } + public void start() { + Process.setThreadPriority(-5); + minBufferSize = AudioTrack.getMinBufferSize(frameRate, + AudioFormat.CHANNEL_OUT_STEREO, + AudioFormat.ENCODING_PCM_FLOAT); + System.out.println("Audio minBufferSize = " + minBufferSize); + bufferSize = (3 * (minBufferSize / 2)) & ~3; + System.out.println("Audio bufferSize = " + bufferSize); + audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, frameRate, + AudioFormat.CHANNEL_OUT_STEREO, + AudioFormat.ENCODING_PCM_FLOAT, bufferSize, + AudioTrack.MODE_STREAM); + audioTrack.play(); + } + /** Grossly inefficient. Call the array version instead. */ + public void write(double value) { + double[] buffer = new double[1]; + buffer[0] = value; + write(buffer, 0, 1); + } + public void write(double[] buffer) { + write(buffer, 0, buffer.length); + } + public void write(double[] buffer, int start, int count) { + // Allocate buffer if needed. + if ((floatBuffer == null) || (floatBuffer.length < count)) { + floatBuffer = new float[count]; + } + // Convert float samples to shorts. + for (int i = 0; i < count; i++) { + floatBuffer[i] = (float) buffer[i + start]; + } + audioTrack.write(floatBuffer, 0, count, AudioTrack.WRITE_BLOCKING); + } + public void stop() { + audioTrack.stop(); + audioTrack.release(); + } + public void close() { + } + } + private class AndroidAudioInputStream extends AndroidAudioStream implements + AudioDeviceInputStream { + public AndroidAudioInputStream(int deviceID, int frameRate, + int samplesPerFrame) { + super(deviceID, frameRate, samplesPerFrame); + } + public void start() { + } + public double read() { + double[] buffer = new double[1]; + read(buffer, 0, 1); + return buffer[0]; + } + public int read(double[] buffer) { + return read(buffer, 0, buffer.length); + } + public int read(double[] buffer, int start, int count) { + return 0; + } + public void stop() { + } + public int available() { + return 0; + } + public void close() { + } + } + public AudioDeviceOutputStream createOutputStream(int deviceID, + int frameRate, int samplesPerFrame) { + return new AndroidAudioOutputStream(deviceID, frameRate, + samplesPerFrame); + } + public AudioDeviceInputStream createInputStream(int deviceID, int frameRate, + int samplesPerFrame) { + if (frameRate > 0) + throw new RuntimeException( + "JSyn audio input not implemented on Android."); + return new AndroidAudioInputStream(deviceID, frameRate, + samplesPerFrame); + } + public double getDefaultHighInputLatency(int deviceID) { + return 0.300; + } + public double getDefaultHighOutputLatency(int deviceID) { + return 0.300; + } + public int getDefaultInputDeviceID() { + return defaultInputDeviceID; + } + public int getDefaultOutputDeviceID() { + return defaultOutputDeviceID; + } + public double getDefaultLowInputLatency(int deviceID) { + return 0.100; + } + public double getDefaultLowOutputLatency(int deviceID) { + return 0.100; + } + public int getDeviceCount() { + return deviceRecords.size(); + } + public String getDeviceName(int deviceID) { + return deviceRecords.get(deviceID).name; + } + public int getMaxInputChannels(int deviceID) { + return deviceRecords.get(deviceID).maxInputs; + } + public int getMaxOutputChannels(int deviceID) { + return deviceRecords.get(deviceID).maxOutputs; + } + public int setSuggestedOutputLatency(double latency) { + suggestedOutputLatency = latency; + return 0; + } + public int setSuggestedInputLatency(double latency) { + suggestedInputLatency = latency; + return 0; + } +} |