/*
* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
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
*/
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;
}