Java example source code file (AudioFloatConverter.java)
The AudioFloatConverter.java Java example source code
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.media.sound;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
/**
* This class is used to convert between 8,16,24,32,32+ bit signed/unsigned
* big/litle endian fixed/floating point byte buffers and float buffers.
*
* @author Karl Helgason
*/
public abstract class AudioFloatConverter {
/***************************************************************************
*
* LSB Filter, used filter least significant byte in samples arrays.
*
* Is used filter out data in lsb byte when SampleSizeInBits is not
* dividable by 8.
*
**************************************************************************/
private static class AudioFloatLSBFilter extends AudioFloatConverter {
private final AudioFloatConverter converter;
final private int offset;
final private int stepsize;
final private byte mask;
private byte[] mask_buffer;
AudioFloatLSBFilter(AudioFloatConverter converter, AudioFormat format) {
int bits = format.getSampleSizeInBits();
boolean bigEndian = format.isBigEndian();
this.converter = converter;
stepsize = (bits + 7) / 8;
offset = bigEndian ? (stepsize - 1) : 0;
int lsb_bits = bits % 8;
if (lsb_bits == 0)
mask = (byte) 0x00;
else if (lsb_bits == 1)
mask = (byte) 0x80;
else if (lsb_bits == 2)
mask = (byte) 0xC0;
else if (lsb_bits == 3)
mask = (byte) 0xE0;
else if (lsb_bits == 4)
mask = (byte) 0xF0;
else if (lsb_bits == 5)
mask = (byte) 0xF8;
else if (lsb_bits == 6)
mask = (byte) 0xFC;
else if (lsb_bits == 7)
mask = (byte) 0xFE;
else
mask = (byte) 0xFF;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
byte[] ret = converter.toByteArray(in_buff, in_offset, in_len,
out_buff, out_offset);
int out_offset_end = in_len * stepsize;
for (int i = out_offset + offset; i < out_offset_end; i += stepsize) {
out_buff[i] = (byte) (out_buff[i] & mask);
}
return ret;
}
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
if (mask_buffer == null || mask_buffer.length < in_buff.length)
mask_buffer = new byte[in_buff.length];
System.arraycopy(in_buff, 0, mask_buffer, 0, in_buff.length);
int in_offset_end = out_len * stepsize;
for (int i = in_offset + offset; i < in_offset_end; i += stepsize) {
mask_buffer[i] = (byte) (mask_buffer[i] & mask);
}
float[] ret = converter.toFloatArray(mask_buffer, in_offset,
out_buff, out_offset, out_len);
return ret;
}
}
/***************************************************************************
*
* 64 bit float, little/big-endian
*
**************************************************************************/
// PCM 64 bit float, little-endian
private static class AudioFloatConversion64L extends AudioFloatConverter {
ByteBuffer bytebuffer = null;
DoubleBuffer floatbuffer = null;
double[] double_buff = null;
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int in_len = out_len * 8;
if (bytebuffer == null || bytebuffer.capacity() < in_len) {
bytebuffer = ByteBuffer.allocate(in_len).order(
ByteOrder.LITTLE_ENDIAN);
floatbuffer = bytebuffer.asDoubleBuffer();
}
bytebuffer.position(0);
floatbuffer.position(0);
bytebuffer.put(in_buff, in_offset, in_len);
if (double_buff == null
|| double_buff.length < out_len + out_offset)
double_buff = new double[out_len + out_offset];
floatbuffer.get(double_buff, out_offset, out_len);
int out_offset_end = out_offset + out_len;
for (int i = out_offset; i < out_offset_end; i++) {
out_buff[i] = (float) double_buff[i];
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int out_len = in_len * 8;
if (bytebuffer == null || bytebuffer.capacity() < out_len) {
bytebuffer = ByteBuffer.allocate(out_len).order(
ByteOrder.LITTLE_ENDIAN);
floatbuffer = bytebuffer.asDoubleBuffer();
}
floatbuffer.position(0);
bytebuffer.position(0);
if (double_buff == null || double_buff.length < in_offset + in_len)
double_buff = new double[in_offset + in_len];
int in_offset_end = in_offset + in_len;
for (int i = in_offset; i < in_offset_end; i++) {
double_buff[i] = in_buff[i];
}
floatbuffer.put(double_buff, in_offset, in_len);
bytebuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
}
// PCM 64 bit float, big-endian
private static class AudioFloatConversion64B extends AudioFloatConverter {
ByteBuffer bytebuffer = null;
DoubleBuffer floatbuffer = null;
double[] double_buff = null;
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int in_len = out_len * 8;
if (bytebuffer == null || bytebuffer.capacity() < in_len) {
bytebuffer = ByteBuffer.allocate(in_len).order(
ByteOrder.BIG_ENDIAN);
floatbuffer = bytebuffer.asDoubleBuffer();
}
bytebuffer.position(0);
floatbuffer.position(0);
bytebuffer.put(in_buff, in_offset, in_len);
if (double_buff == null
|| double_buff.length < out_len + out_offset)
double_buff = new double[out_len + out_offset];
floatbuffer.get(double_buff, out_offset, out_len);
int out_offset_end = out_offset + out_len;
for (int i = out_offset; i < out_offset_end; i++) {
out_buff[i] = (float) double_buff[i];
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int out_len = in_len * 8;
if (bytebuffer == null || bytebuffer.capacity() < out_len) {
bytebuffer = ByteBuffer.allocate(out_len).order(
ByteOrder.BIG_ENDIAN);
floatbuffer = bytebuffer.asDoubleBuffer();
}
floatbuffer.position(0);
bytebuffer.position(0);
if (double_buff == null || double_buff.length < in_offset + in_len)
double_buff = new double[in_offset + in_len];
int in_offset_end = in_offset + in_len;
for (int i = in_offset; i < in_offset_end; i++) {
double_buff[i] = in_buff[i];
}
floatbuffer.put(double_buff, in_offset, in_len);
bytebuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
}
/***************************************************************************
*
* 32 bit float, little/big-endian
*
**************************************************************************/
// PCM 32 bit float, little-endian
private static class AudioFloatConversion32L extends AudioFloatConverter {
ByteBuffer bytebuffer = null;
FloatBuffer floatbuffer = null;
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int in_len = out_len * 4;
if (bytebuffer == null || bytebuffer.capacity() < in_len) {
bytebuffer = ByteBuffer.allocate(in_len).order(
ByteOrder.LITTLE_ENDIAN);
floatbuffer = bytebuffer.asFloatBuffer();
}
bytebuffer.position(0);
floatbuffer.position(0);
bytebuffer.put(in_buff, in_offset, in_len);
floatbuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int out_len = in_len * 4;
if (bytebuffer == null || bytebuffer.capacity() < out_len) {
bytebuffer = ByteBuffer.allocate(out_len).order(
ByteOrder.LITTLE_ENDIAN);
floatbuffer = bytebuffer.asFloatBuffer();
}
floatbuffer.position(0);
bytebuffer.position(0);
floatbuffer.put(in_buff, in_offset, in_len);
bytebuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
}
// PCM 32 bit float, big-endian
private static class AudioFloatConversion32B extends AudioFloatConverter {
ByteBuffer bytebuffer = null;
FloatBuffer floatbuffer = null;
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int in_len = out_len * 4;
if (bytebuffer == null || bytebuffer.capacity() < in_len) {
bytebuffer = ByteBuffer.allocate(in_len).order(
ByteOrder.BIG_ENDIAN);
floatbuffer = bytebuffer.asFloatBuffer();
}
bytebuffer.position(0);
floatbuffer.position(0);
bytebuffer.put(in_buff, in_offset, in_len);
floatbuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int out_len = in_len * 4;
if (bytebuffer == null || bytebuffer.capacity() < out_len) {
bytebuffer = ByteBuffer.allocate(out_len).order(
ByteOrder.BIG_ENDIAN);
floatbuffer = bytebuffer.asFloatBuffer();
}
floatbuffer.position(0);
bytebuffer.position(0);
floatbuffer.put(in_buff, in_offset, in_len);
bytebuffer.get(out_buff, out_offset, out_len);
return out_buff;
}
}
/***************************************************************************
*
* 8 bit signed/unsigned
*
**************************************************************************/
// PCM 8 bit, signed
private static class AudioFloatConversion8S extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++)
out_buff[ox++] = in_buff[ix++] * (1.0f / 127.0f);
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++)
out_buff[ox++] = (byte) (in_buff[ix++] * 127.0f);
return out_buff;
}
}
// PCM 8 bit, unsigned
private static class AudioFloatConversion8U extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++)
out_buff[ox++] = ((in_buff[ix++] & 0xFF) - 127)
* (1.0f / 127.0f);
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++)
out_buff[ox++] = (byte) (127 + in_buff[ix++] * 127.0f);
return out_buff;
}
}
/***************************************************************************
*
* 16 bit signed/unsigned, little/big-endian
*
**************************************************************************/
// PCM 16 bit, signed, little-endian
private static class AudioFloatConversion16SL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int len = out_offset + out_len;
for (int ox = out_offset; ox < len; ox++) {
out_buff[ox] = ((short) ((in_buff[ix++] & 0xFF) |
(in_buff[ix++] << 8))) * (1.0f / 32767.0f);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ox = out_offset;
int len = in_offset + in_len;
for (int ix = in_offset; ix < len; ix++) {
int x = (int) (in_buff[ix] * 32767.0);
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
}
return out_buff;
}
}
// PCM 16 bit, signed, big-endian
private static class AudioFloatConversion16SB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
out_buff[ox++] = ((short) ((in_buff[ix++] << 8) |
(in_buff[ix++] & 0xFF))) * (1.0f / 32767.0f);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * 32767.0);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
// PCM 16 bit, unsigned, little-endian
private static class AudioFloatConversion16UL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8);
out_buff[ox++] = (x - 32767) * (1.0f / 32767.0f);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = 32767 + (int) (in_buff[ix++] * 32767.0);
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
}
return out_buff;
}
}
// PCM 16 bit, unsigned, big-endian
private static class AudioFloatConversion16UB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
out_buff[ox++] = (x - 32767) * (1.0f / 32767.0f);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = 32767 + (int) (in_buff[ix++] * 32767.0);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
/***************************************************************************
*
* 24 bit signed/unsigned, little/big-endian
*
**************************************************************************/
// PCM 24 bit, signed, little-endian
private static class AudioFloatConversion24SL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8)
| ((in_buff[ix++] & 0xFF) << 16);
if (x > 0x7FFFFF)
x -= 0x1000000;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFF);
if (x < 0)
x += 0x1000000;
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
}
return out_buff;
}
}
// PCM 24 bit, signed, big-endian
private static class AudioFloatConversion24SB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 16)
| ((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
if (x > 0x7FFFFF)
x -= 0x1000000;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFF);
if (x < 0)
x += 0x1000000;
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
// PCM 24 bit, unsigned, little-endian
private static class AudioFloatConversion24UL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8)
| ((in_buff[ix++] & 0xFF) << 16);
x -= 0x7FFFFF;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFF);
x += 0x7FFFFF;
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
}
return out_buff;
}
}
// PCM 24 bit, unsigned, big-endian
private static class AudioFloatConversion24UB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 16)
| ((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
x -= 0x7FFFFF;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFF);
x += 0x7FFFFF;
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
/***************************************************************************
*
* 32 bit signed/unsigned, little/big-endian
*
**************************************************************************/
// PCM 32 bit, signed, little-endian
private static class AudioFloatConversion32SL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8) |
((in_buff[ix++] & 0xFF) << 16) |
((in_buff[ix++] & 0xFF) << 24);
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 24);
}
return out_buff;
}
}
// PCM 32 bit, signed, big-endian
private static class AudioFloatConversion32SB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 24) |
((in_buff[ix++] & 0xFF) << 16) |
((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
out_buff[ox++] = (byte) (x >>> 24);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
// PCM 32 bit, unsigned, little-endian
private static class AudioFloatConversion32UL extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8) |
((in_buff[ix++] & 0xFF) << 16) |
((in_buff[ix++] & 0xFF) << 24);
x -= 0x7FFFFFFF;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
x += 0x7FFFFFFF;
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 24);
}
return out_buff;
}
}
// PCM 32 bit, unsigned, big-endian
private static class AudioFloatConversion32UB extends AudioFloatConverter {
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 24) |
((in_buff[ix++] & 0xFF) << 16) |
((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
x -= 0x7FFFFFFF;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
x += 0x7FFFFFFF;
out_buff[ox++] = (byte) (x >>> 24);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
}
return out_buff;
}
}
/***************************************************************************
*
* 32+ bit signed/unsigned, little/big-endian
*
**************************************************************************/
// PCM 32+ bit, signed, little-endian
private static class AudioFloatConversion32xSL extends AudioFloatConverter {
final int xbytes;
AudioFloatConversion32xSL(int xbytes) {
this.xbytes = xbytes;
}
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
ix += xbytes;
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8)
| ((in_buff[ix++] & 0xFF) << 16)
| ((in_buff[ix++] & 0xFF) << 24);
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
for (int j = 0; j < xbytes; j++) {
out_buff[ox++] = 0;
}
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 24);
}
return out_buff;
}
}
// PCM 32+ bit, signed, big-endian
private static class AudioFloatConversion32xSB extends AudioFloatConverter {
final int xbytes;
AudioFloatConversion32xSB(int xbytes) {
this.xbytes = xbytes;
}
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 24)
| ((in_buff[ix++] & 0xFF) << 16)
| ((in_buff[ix++] & 0xFF) << 8)
| (in_buff[ix++] & 0xFF);
ix += xbytes;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
out_buff[ox++] = (byte) (x >>> 24);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
for (int j = 0; j < xbytes; j++) {
out_buff[ox++] = 0;
}
}
return out_buff;
}
}
// PCM 32+ bit, unsigned, little-endian
private static class AudioFloatConversion32xUL extends AudioFloatConverter {
final int xbytes;
AudioFloatConversion32xUL(int xbytes) {
this.xbytes = xbytes;
}
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
ix += xbytes;
int x = (in_buff[ix++] & 0xFF) | ((in_buff[ix++] & 0xFF) << 8)
| ((in_buff[ix++] & 0xFF) << 16)
| ((in_buff[ix++] & 0xFF) << 24);
x -= 0x7FFFFFFF;
out_buff[ox++] = x * (1.0f / (float)0x7FFFFFFF);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * (float)0x7FFFFFFF);
x += 0x7FFFFFFF;
for (int j = 0; j < xbytes; j++) {
out_buff[ox++] = 0;
}
out_buff[ox++] = (byte) x;
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 24);
}
return out_buff;
}
}
// PCM 32+ bit, unsigned, big-endian
private static class AudioFloatConversion32xUB extends AudioFloatConverter {
final int xbytes;
AudioFloatConversion32xUB(int xbytes) {
this.xbytes = xbytes;
}
public float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < out_len; i++) {
int x = ((in_buff[ix++] & 0xFF) << 24) |
((in_buff[ix++] & 0xFF) << 16) |
((in_buff[ix++] & 0xFF) << 8) | (in_buff[ix++] & 0xFF);
ix += xbytes;
x -= 2147483647;
out_buff[ox++] = x * (1.0f / 2147483647.0f);
}
return out_buff;
}
public byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff, int out_offset) {
int ix = in_offset;
int ox = out_offset;
for (int i = 0; i < in_len; i++) {
int x = (int) (in_buff[ix++] * 2147483647.0);
x += 2147483647;
out_buff[ox++] = (byte) (x >>> 24);
out_buff[ox++] = (byte) (x >>> 16);
out_buff[ox++] = (byte) (x >>> 8);
out_buff[ox++] = (byte) x;
for (int j = 0; j < xbytes; j++) {
out_buff[ox++] = 0;
}
}
return out_buff;
}
}
public static AudioFloatConverter getConverter(AudioFormat format) {
AudioFloatConverter conv = null;
if (format.getFrameSize() == 0)
return null;
if (format.getFrameSize() !=
((format.getSampleSizeInBits() + 7) / 8) * format.getChannels()) {
return null;
}
if (format.getEncoding().equals(Encoding.PCM_SIGNED)) {
if (format.isBigEndian()) {
if (format.getSampleSizeInBits() <= 8) {
conv = new AudioFloatConversion8S();
} else if (format.getSampleSizeInBits() > 8 &&
format.getSampleSizeInBits() <= 16) {
conv = new AudioFloatConversion16SB();
} else if (format.getSampleSizeInBits() > 16 &&
format.getSampleSizeInBits() <= 24) {
conv = new AudioFloatConversion24SB();
} else if (format.getSampleSizeInBits() > 24 &&
format.getSampleSizeInBits() <= 32) {
conv = new AudioFloatConversion32SB();
} else if (format.getSampleSizeInBits() > 32) {
conv = new AudioFloatConversion32xSB(((format
.getSampleSizeInBits() + 7) / 8) - 4);
}
} else {
if (format.getSampleSizeInBits() <= 8) {
conv = new AudioFloatConversion8S();
} else if (format.getSampleSizeInBits() > 8 &&
format.getSampleSizeInBits() <= 16) {
conv = new AudioFloatConversion16SL();
} else if (format.getSampleSizeInBits() > 16 &&
format.getSampleSizeInBits() <= 24) {
conv = new AudioFloatConversion24SL();
} else if (format.getSampleSizeInBits() > 24 &&
format.getSampleSizeInBits() <= 32) {
conv = new AudioFloatConversion32SL();
} else if (format.getSampleSizeInBits() > 32) {
conv = new AudioFloatConversion32xSL(((format
.getSampleSizeInBits() + 7) / 8) - 4);
}
}
} else if (format.getEncoding().equals(Encoding.PCM_UNSIGNED)) {
if (format.isBigEndian()) {
if (format.getSampleSizeInBits() <= 8) {
conv = new AudioFloatConversion8U();
} else if (format.getSampleSizeInBits() > 8 &&
format.getSampleSizeInBits() <= 16) {
conv = new AudioFloatConversion16UB();
} else if (format.getSampleSizeInBits() > 16 &&
format.getSampleSizeInBits() <= 24) {
conv = new AudioFloatConversion24UB();
} else if (format.getSampleSizeInBits() > 24 &&
format.getSampleSizeInBits() <= 32) {
conv = new AudioFloatConversion32UB();
} else if (format.getSampleSizeInBits() > 32) {
conv = new AudioFloatConversion32xUB(((
format.getSampleSizeInBits() + 7) / 8) - 4);
}
} else {
if (format.getSampleSizeInBits() <= 8) {
conv = new AudioFloatConversion8U();
} else if (format.getSampleSizeInBits() > 8 &&
format.getSampleSizeInBits() <= 16) {
conv = new AudioFloatConversion16UL();
} else if (format.getSampleSizeInBits() > 16 &&
format.getSampleSizeInBits() <= 24) {
conv = new AudioFloatConversion24UL();
} else if (format.getSampleSizeInBits() > 24 &&
format.getSampleSizeInBits() <= 32) {
conv = new AudioFloatConversion32UL();
} else if (format.getSampleSizeInBits() > 32) {
conv = new AudioFloatConversion32xUL(((
format.getSampleSizeInBits() + 7) / 8) - 4);
}
}
} else if (format.getEncoding().equals(Encoding.PCM_FLOAT)) {
if (format.getSampleSizeInBits() == 32) {
if (format.isBigEndian())
conv = new AudioFloatConversion32B();
else
conv = new AudioFloatConversion32L();
} else if (format.getSampleSizeInBits() == 64) {
if (format.isBigEndian())
conv = new AudioFloatConversion64B();
else
conv = new AudioFloatConversion64L();
}
}
if ((format.getEncoding().equals(Encoding.PCM_SIGNED) ||
format.getEncoding().equals(Encoding.PCM_UNSIGNED)) &&
(format.getSampleSizeInBits() % 8 != 0)) {
conv = new AudioFloatLSBFilter(conv, format);
}
if (conv != null)
conv.format = format;
return conv;
}
private AudioFormat format;
public final AudioFormat getFormat() {
return format;
}
public abstract float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_offset, int out_len);
public final float[] toFloatArray(byte[] in_buff, float[] out_buff,
int out_offset, int out_len) {
return toFloatArray(in_buff, 0, out_buff, out_offset, out_len);
}
public final float[] toFloatArray(byte[] in_buff, int in_offset,
float[] out_buff, int out_len) {
return toFloatArray(in_buff, in_offset, out_buff, 0, out_len);
}
public final float[] toFloatArray(byte[] in_buff, float[] out_buff,
int out_len) {
return toFloatArray(in_buff, 0, out_buff, 0, out_len);
}
public final float[] toFloatArray(byte[] in_buff, float[] out_buff) {
return toFloatArray(in_buff, 0, out_buff, 0, out_buff.length);
}
public abstract byte[] toByteArray(float[] in_buff, int in_offset,
int in_len, byte[] out_buff, int out_offset);
public final byte[] toByteArray(float[] in_buff, int in_len,
byte[] out_buff, int out_offset) {
return toByteArray(in_buff, 0, in_len, out_buff, out_offset);
}
public final byte[] toByteArray(float[] in_buff, int in_offset, int in_len,
byte[] out_buff) {
return toByteArray(in_buff, in_offset, in_len, out_buff, 0);
}
public final byte[] toByteArray(float[] in_buff, int in_len,
byte[] out_buff) {
return toByteArray(in_buff, 0, in_len, out_buff, 0);
}
public final byte[] toByteArray(float[] in_buff, byte[] out_buff) {
return toByteArray(in_buff, 0, in_buff.length, out_buff, 0);
}
}
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