aboutsummaryrefslogtreecommitdiffstats
path: root/src/com/jsyn/util/JavaSoundSampleLoader.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/com/jsyn/util/JavaSoundSampleLoader.java')
-rw-r--r--src/com/jsyn/util/JavaSoundSampleLoader.java150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/com/jsyn/util/JavaSoundSampleLoader.java b/src/com/jsyn/util/JavaSoundSampleLoader.java
new file mode 100644
index 0000000..9376c96
--- /dev/null
+++ b/src/com/jsyn/util/JavaSoundSampleLoader.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2011 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.util;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.UnsupportedAudioFileException;
+
+import com.jsyn.data.FloatSample;
+
+/**
+ * Internal class for loading audio samples. Use SampleLoader instead.
+ *
+ * @author Phil Burk (C) 2011 Mobileer Inc
+ */
+class JavaSoundSampleLoader implements AudioSampleLoader {
+ /**
+ * Load a FloatSample from a File object.
+ */
+ @Override
+ public FloatSample loadFloatSample(File fileIn) throws IOException {
+ try {
+ return loadFloatSample(AudioSystem.getAudioInputStream(fileIn));
+ } catch (UnsupportedAudioFileException e) {
+ throw new IOException(e);
+ }
+ }
+
+ /**
+ * Load a FloatSample from an InputStream. This is handy when loading Resources from a JAR file.
+ */
+ @Override
+ public FloatSample loadFloatSample(InputStream inputStream) throws IOException {
+ try {
+ return loadFloatSample(AudioSystem.getAudioInputStream(inputStream));
+ } catch (UnsupportedAudioFileException e) {
+ throw new IOException(e);
+ }
+ }
+
+ /**
+ * Load a FloatSample from a URL.. This is handy when loading Resources from a website.
+ */
+ @Override
+ public FloatSample loadFloatSample(URL url) throws IOException {
+ try {
+ return loadFloatSample(AudioSystem.getAudioInputStream(url));
+ } catch (UnsupportedAudioFileException e) {
+ throw new IOException(e);
+ }
+ }
+
+ private FloatSample loadFloatSample(javax.sound.sampled.AudioInputStream audioInputStream)
+ throws IOException, UnsupportedAudioFileException {
+ float[] floatData = null;
+ FloatSample sample = null;
+ int bytesPerFrame = audioInputStream.getFormat().getFrameSize();
+ if (bytesPerFrame == AudioSystem.NOT_SPECIFIED) {
+ // some audio formats may have unspecified frame size
+ // in that case we may read any amount of bytes
+ bytesPerFrame = 1;
+ }
+ AudioFormat format = audioInputStream.getFormat();
+ System.out.println("Format = " + format);
+ if (format.getEncoding() == AudioFormat.Encoding.PCM_SIGNED) {
+ floatData = loadSignedPCM(audioInputStream);
+ }
+ sample = new FloatSample(floatData, format.getChannels());
+ sample.setFrameRate(format.getFrameRate());
+ return sample;
+ }
+
+ private float[] loadSignedPCM(AudioInputStream audioInputStream) throws IOException,
+ UnsupportedAudioFileException {
+ int totalSamplesRead = 0;
+ AudioFormat format = audioInputStream.getFormat();
+ int numFrames = (int) audioInputStream.getFrameLength();
+ int numSamples = format.getChannels() * numFrames;
+ float[] data = new float[numSamples];
+ final int bytesPerFrame = format.getFrameSize();
+ // Set an arbitrary buffer size of 1024 frames.
+ int numBytes = 1024 * bytesPerFrame;
+ byte[] audioBytes = new byte[numBytes];
+ int numBytesRead = 0;
+ int numFramesRead = 0;
+ // Try to read numBytes bytes from the file.
+ while ((numBytesRead = audioInputStream.read(audioBytes)) != -1) {
+ int bytesRemainder = numBytesRead % bytesPerFrame;
+ if (bytesRemainder != 0) {
+ // TODO Read until you get enough data.
+ throw new IOException("Read partial block of sample data!");
+ }
+
+ if (audioInputStream.getFormat().getSampleSizeInBits() == 16) {
+ if (format.isBigEndian()) {
+ SampleLoader.decodeBigI16ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ } else {
+ SampleLoader.decodeLittleI16ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ }
+ } else if (audioInputStream.getFormat().getSampleSizeInBits() == 24) {
+ if (format.isBigEndian()) {
+ SampleLoader.decodeBigI24ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ } else {
+ SampleLoader.decodeLittleI24ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ }
+ } else if (audioInputStream.getFormat().getSampleSizeInBits() == 32) {
+ if (format.isBigEndian()) {
+ SampleLoader.decodeBigI32ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ } else {
+ SampleLoader.decodeLittleI32ToF32(audioBytes, 0, numBytesRead, data,
+ totalSamplesRead);
+ }
+ } else {
+ throw new UnsupportedAudioFileException(
+ "Only 16, 24 or 32 bit PCM samples supported.");
+ }
+
+ // Calculate the number of frames actually read.
+ numFramesRead = numBytesRead / bytesPerFrame;
+ totalSamplesRead += numFramesRead * format.getChannels();
+ }
+ return data;
+ }
+
+}