282 lines
9.5 KiB
Java
282 lines
9.5 KiB
Java
/*
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* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.media.sound;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import javax.sound.sampled.AudioFormat;
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import javax.sound.sampled.AudioInputStream;
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import javax.sound.sampled.AudioSystem;
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import javax.sound.sampled.UnsupportedAudioFileException;
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/**
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* This class is used to create AudioFloatInputStream from AudioInputStream and
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* byte buffers.
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*
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* @author Karl Helgason
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*/
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public abstract class AudioFloatInputStream {
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private static class BytaArrayAudioFloatInputStream
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extends AudioFloatInputStream {
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private int pos = 0;
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private int markpos = 0;
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private final AudioFloatConverter converter;
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private final AudioFormat format;
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private final byte[] buffer;
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private final int buffer_offset;
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private final int buffer_len;
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private final int framesize_pc;
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BytaArrayAudioFloatInputStream(AudioFloatConverter converter,
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byte[] buffer, int offset, int len) {
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this.converter = converter;
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this.format = converter.getFormat();
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this.buffer = buffer;
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this.buffer_offset = offset;
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framesize_pc = format.getFrameSize() / format.getChannels();
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this.buffer_len = len / framesize_pc;
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}
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public AudioFormat getFormat() {
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return format;
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}
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public long getFrameLength() {
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return buffer_len;// / format.getFrameSize();
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}
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public int read(float[] b, int off, int len) throws IOException {
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if (b == null)
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throw new NullPointerException();
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if (off < 0 || len < 0 || len > b.length - off)
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throw new IndexOutOfBoundsException();
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if (pos >= buffer_len)
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return -1;
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if (len == 0)
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return 0;
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if (pos + len > buffer_len)
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len = buffer_len - pos;
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converter.toFloatArray(buffer, buffer_offset + pos * framesize_pc,
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b, off, len);
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pos += len;
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return len;
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}
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public long skip(long len) throws IOException {
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if (pos >= buffer_len)
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return -1;
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if (len <= 0)
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return 0;
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if (pos + len > buffer_len)
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len = buffer_len - pos;
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pos += len;
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return len;
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}
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public int available() throws IOException {
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return buffer_len - pos;
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}
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public void close() throws IOException {
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}
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public void mark(int readlimit) {
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markpos = pos;
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}
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public boolean markSupported() {
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return true;
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}
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public void reset() throws IOException {
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pos = markpos;
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}
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}
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private static class DirectAudioFloatInputStream
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extends AudioFloatInputStream {
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private final AudioInputStream stream;
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private AudioFloatConverter converter;
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private final int framesize_pc; // framesize / channels
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private byte[] buffer;
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DirectAudioFloatInputStream(AudioInputStream stream) {
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converter = AudioFloatConverter.getConverter(stream.getFormat());
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if (converter == null) {
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AudioFormat format = stream.getFormat();
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AudioFormat newformat;
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AudioFormat[] formats = AudioSystem.getTargetFormats(
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AudioFormat.Encoding.PCM_SIGNED, format);
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if (formats.length != 0) {
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newformat = formats[0];
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} else {
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float samplerate = format.getSampleRate();
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int samplesizeinbits = format.getSampleSizeInBits();
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int framesize = format.getFrameSize();
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float framerate = format.getFrameRate();
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samplesizeinbits = 16;
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framesize = format.getChannels() * (samplesizeinbits / 8);
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framerate = samplerate;
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newformat = new AudioFormat(
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AudioFormat.Encoding.PCM_SIGNED, samplerate,
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samplesizeinbits, format.getChannels(), framesize,
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framerate, false);
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}
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stream = AudioSystem.getAudioInputStream(newformat, stream);
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converter = AudioFloatConverter.getConverter(stream.getFormat());
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}
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framesize_pc = stream.getFormat().getFrameSize()
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/ stream.getFormat().getChannels();
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this.stream = stream;
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}
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public AudioFormat getFormat() {
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return stream.getFormat();
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}
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public long getFrameLength() {
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return stream.getFrameLength();
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}
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public int read(float[] b, int off, int len) throws IOException {
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int b_len = len * framesize_pc;
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if (buffer == null || buffer.length < b_len)
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buffer = new byte[b_len];
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int ret = stream.read(buffer, 0, b_len);
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if (ret == -1)
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return -1;
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converter.toFloatArray(buffer, b, off, ret / framesize_pc);
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return ret / framesize_pc;
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}
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public long skip(long len) throws IOException {
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long b_len = len * framesize_pc;
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long ret = stream.skip(b_len);
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if (ret == -1)
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return -1;
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return ret / framesize_pc;
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}
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public int available() throws IOException {
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return stream.available() / framesize_pc;
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}
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public void close() throws IOException {
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stream.close();
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}
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public void mark(int readlimit) {
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stream.mark(readlimit * framesize_pc);
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}
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public boolean markSupported() {
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return stream.markSupported();
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}
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public void reset() throws IOException {
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stream.reset();
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}
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}
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public static AudioFloatInputStream getInputStream(URL url)
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throws UnsupportedAudioFileException, IOException {
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return new DirectAudioFloatInputStream(AudioSystem
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.getAudioInputStream(url));
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}
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public static AudioFloatInputStream getInputStream(File file)
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throws UnsupportedAudioFileException, IOException {
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return new DirectAudioFloatInputStream(AudioSystem
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.getAudioInputStream(file));
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}
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public static AudioFloatInputStream getInputStream(InputStream stream)
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throws UnsupportedAudioFileException, IOException {
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return new DirectAudioFloatInputStream(AudioSystem
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.getAudioInputStream(stream));
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}
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public static AudioFloatInputStream getInputStream(
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AudioInputStream stream) {
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return new DirectAudioFloatInputStream(stream);
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}
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public static AudioFloatInputStream getInputStream(AudioFormat format,
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byte[] buffer, int offset, int len) {
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AudioFloatConverter converter = AudioFloatConverter
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.getConverter(format);
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if (converter != null)
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return new BytaArrayAudioFloatInputStream(converter, buffer,
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offset, len);
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InputStream stream = new ByteArrayInputStream(buffer, offset, len);
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long aLen = format.getFrameSize() == AudioSystem.NOT_SPECIFIED
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? AudioSystem.NOT_SPECIFIED : len / format.getFrameSize();
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AudioInputStream astream = new AudioInputStream(stream, format, aLen);
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return getInputStream(astream);
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}
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public abstract AudioFormat getFormat();
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public abstract long getFrameLength();
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public abstract int read(float[] b, int off, int len) throws IOException;
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public final int read(float[] b) throws IOException {
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return read(b, 0, b.length);
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}
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public final float read() throws IOException {
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float[] b = new float[1];
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int ret = read(b, 0, 1);
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if (ret == -1 || ret == 0)
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return 0;
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return b[0];
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}
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public abstract long skip(long len) throws IOException;
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public abstract int available() throws IOException;
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public abstract void close() throws IOException;
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public abstract void mark(int readlimit);
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public abstract boolean markSupported();
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public abstract void reset() throws IOException;
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}
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