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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package com.sun.media.sound;

import java.io.ByteArrayInputStream;
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;

This class is used to create AudioFloatInputStream from AudioInputStream and byte buffers.
Author:Karl Helgason
/** * This class is used to create AudioFloatInputStream from AudioInputStream and * byte buffers. * * @author Karl Helgason */
public abstract class AudioFloatInputStream { private static class BytaArrayAudioFloatInputStream extends AudioFloatInputStream { private int pos = 0; private int markpos = 0; private final AudioFloatConverter converter; private final AudioFormat format; private final byte[] buffer; private final int buffer_offset; private final int buffer_len; private final int framesize_pc; BytaArrayAudioFloatInputStream(AudioFloatConverter converter, byte[] buffer, int offset, int len) { this.converter = converter; this.format = converter.getFormat(); this.buffer = buffer; this.buffer_offset = offset; framesize_pc = format.getFrameSize() / format.getChannels(); this.buffer_len = len / framesize_pc; } public AudioFormat getFormat() { return format; } public long getFrameLength() { return buffer_len;// / format.getFrameSize(); } public int read(float[] b, int off, int len) throws IOException { if (b == null) throw new NullPointerException(); if (off < 0 || len < 0 || len > b.length - off) throw new IndexOutOfBoundsException(); if (pos >= buffer_len) return -1; if (len == 0) return 0; if (pos + len > buffer_len) len = buffer_len - pos; converter.toFloatArray(buffer, buffer_offset + pos * framesize_pc, b, off, len); pos += len; return len; } public long skip(long len) throws IOException { if (pos >= buffer_len) return -1; if (len <= 0) return 0; if (pos + len > buffer_len) len = buffer_len - pos; pos += len; return len; } public int available() throws IOException { return buffer_len - pos; } public void close() throws IOException { } public void mark(int readlimit) { markpos = pos; } public boolean markSupported() { return true; } public void reset() throws IOException { pos = markpos; } } private static class DirectAudioFloatInputStream extends AudioFloatInputStream { private final AudioInputStream stream; private AudioFloatConverter converter; private final int framesize_pc; // framesize / channels private byte[] buffer; DirectAudioFloatInputStream(AudioInputStream stream) { converter = AudioFloatConverter.getConverter(stream.getFormat()); if (converter == null) { AudioFormat format = stream.getFormat(); AudioFormat newformat; AudioFormat[] formats = AudioSystem.getTargetFormats( AudioFormat.Encoding.PCM_SIGNED, format); if (formats.length != 0) { newformat = formats[0]; } else { float samplerate = format.getSampleRate(); int samplesizeinbits = format.getSampleSizeInBits(); int framesize = format.getFrameSize(); float framerate = format.getFrameRate(); samplesizeinbits = 16; framesize = format.getChannels() * (samplesizeinbits / 8); framerate = samplerate; newformat = new AudioFormat( AudioFormat.Encoding.PCM_SIGNED, samplerate, samplesizeinbits, format.getChannels(), framesize, framerate, false); } stream = AudioSystem.getAudioInputStream(newformat, stream); converter = AudioFloatConverter.getConverter(stream.getFormat()); } framesize_pc = stream.getFormat().getFrameSize() / stream.getFormat().getChannels(); this.stream = stream; } public AudioFormat getFormat() { return stream.getFormat(); } public long getFrameLength() { return stream.getFrameLength(); } public int read(float[] b, int off, int len) throws IOException { int b_len = len * framesize_pc; if (buffer == null || buffer.length < b_len) buffer = new byte[b_len]; int ret = stream.read(buffer, 0, b_len); if (ret == -1) return -1; converter.toFloatArray(buffer, b, off, ret / framesize_pc); return ret / framesize_pc; } public long skip(long len) throws IOException { long b_len = len * framesize_pc; long ret = stream.skip(b_len); if (ret == -1) return -1; return ret / framesize_pc; } public int available() throws IOException { return stream.available() / framesize_pc; } public void close() throws IOException { stream.close(); } public void mark(int readlimit) { stream.mark(readlimit * framesize_pc); } public boolean markSupported() { return stream.markSupported(); } public void reset() throws IOException { stream.reset(); } } public static AudioFloatInputStream getInputStream(URL url) throws UnsupportedAudioFileException, IOException { return new DirectAudioFloatInputStream(AudioSystem .getAudioInputStream(url)); } public static AudioFloatInputStream getInputStream(File file) throws UnsupportedAudioFileException, IOException { return new DirectAudioFloatInputStream(AudioSystem .getAudioInputStream(file)); } public static AudioFloatInputStream getInputStream(InputStream stream) throws UnsupportedAudioFileException, IOException { return new DirectAudioFloatInputStream(AudioSystem .getAudioInputStream(stream)); } public static AudioFloatInputStream getInputStream( AudioInputStream stream) { return new DirectAudioFloatInputStream(stream); } public static AudioFloatInputStream getInputStream(AudioFormat format, byte[] buffer, int offset, int len) { AudioFloatConverter converter = AudioFloatConverter .getConverter(format); if (converter != null) return new BytaArrayAudioFloatInputStream(converter, buffer, offset, len); InputStream stream = new ByteArrayInputStream(buffer, offset, len); long aLen = format.getFrameSize() == AudioSystem.NOT_SPECIFIED ? AudioSystem.NOT_SPECIFIED : len / format.getFrameSize(); AudioInputStream astream = new AudioInputStream(stream, format, aLen); return getInputStream(astream); } public abstract AudioFormat getFormat(); public abstract long getFrameLength(); public abstract int read(float[] b, int off, int len) throws IOException; public final int read(float[] b) throws IOException { return read(b, 0, b.length); } public final float read() throws IOException { float[] b = new float[1]; int ret = read(b, 0, 1); if (ret == -1 || ret == 0) return 0; return b[0]; } public abstract long skip(long len) throws IOException; public abstract int available() throws IOException; public abstract void close() throws IOException; public abstract void mark(int readlimit); public abstract boolean markSupported(); public abstract void reset() throws IOException; }