--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AudioFloatConverter.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,1057 @@
+/*
+ * 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.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);
+ }
+}