| /* |
| * Copyright (c) 2007, 2016, 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.DataInputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.RandomAccessFile; |
| import java.util.Collection; |
| |
| /** |
| * This class is a pointer to a binary array either in memory or on disk. |
| * |
| * @author Karl Helgason |
| */ |
| public final class ModelByteBuffer { |
| |
| private ModelByteBuffer root = this; |
| private File file; |
| private long fileoffset; |
| private byte[] buffer; |
| private long offset; |
| private final long len; |
| |
| private class RandomFileInputStream extends InputStream { |
| |
| private final RandomAccessFile raf; |
| private long left; |
| private long mark = 0; |
| private long markleft = 0; |
| |
| RandomFileInputStream() throws IOException { |
| raf = new RandomAccessFile(root.file, "r"); |
| raf.seek(root.fileoffset + arrayOffset()); |
| left = capacity(); |
| } |
| |
| @Override |
| public int available() throws IOException { |
| if (left > Integer.MAX_VALUE) |
| return Integer.MAX_VALUE; |
| return (int)left; |
| } |
| |
| @Override |
| public synchronized void mark(int readlimit) { |
| try { |
| mark = raf.getFilePointer(); |
| markleft = left; |
| } catch (IOException e) { |
| //e.printStackTrace(); |
| } |
| } |
| |
| @Override |
| public boolean markSupported() { |
| return true; |
| } |
| |
| @Override |
| public synchronized void reset() throws IOException { |
| raf.seek(mark); |
| left = markleft; |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| if( n < 0) |
| return 0; |
| if (n > left) |
| n = left; |
| long p = raf.getFilePointer(); |
| raf.seek(p + n); |
| left -= n; |
| return n; |
| } |
| |
| @Override |
| public int read(byte b[], int off, int len) throws IOException { |
| if (len > left) |
| len = (int)left; |
| if (left == 0) |
| return -1; |
| len = raf.read(b, off, len); |
| if (len == -1) |
| return -1; |
| left -= len; |
| return len; |
| } |
| |
| @Override |
| public int read(byte[] b) throws IOException { |
| int len = b.length; |
| if (len > left) |
| len = (int)left; |
| if (left == 0) |
| return -1; |
| len = raf.read(b, 0, len); |
| if (len == -1) |
| return -1; |
| left -= len; |
| return len; |
| } |
| |
| @Override |
| public int read() throws IOException { |
| if (left == 0) |
| return -1; |
| int b = raf.read(); |
| if (b == -1) |
| return -1; |
| left--; |
| return b; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| raf.close(); |
| } |
| } |
| |
| private ModelByteBuffer(ModelByteBuffer parent, |
| long beginIndex, long endIndex, boolean independent) { |
| this.root = parent.root; |
| this.offset = 0; |
| long parent_len = parent.len; |
| if (beginIndex < 0) |
| beginIndex = 0; |
| if (beginIndex > parent_len) |
| beginIndex = parent_len; |
| if (endIndex < 0) |
| endIndex = 0; |
| if (endIndex > parent_len) |
| endIndex = parent_len; |
| if (beginIndex > endIndex) |
| beginIndex = endIndex; |
| offset = beginIndex; |
| len = endIndex - beginIndex; |
| if (independent) { |
| buffer = root.buffer; |
| if (root.file != null) { |
| file = root.file; |
| fileoffset = root.fileoffset + arrayOffset(); |
| offset = 0; |
| } else |
| offset = arrayOffset(); |
| root = this; |
| } |
| } |
| |
| public ModelByteBuffer(byte[] buffer) { |
| this.buffer = buffer; |
| this.offset = 0; |
| this.len = buffer.length; |
| } |
| |
| public ModelByteBuffer(byte[] buffer, int offset, int len) { |
| this.buffer = buffer; |
| this.offset = offset; |
| this.len = len; |
| } |
| |
| public ModelByteBuffer(File file) { |
| this.file = file; |
| this.fileoffset = 0; |
| this.len = file.length(); |
| } |
| |
| public ModelByteBuffer(File file, long offset, long len) { |
| this.file = file; |
| this.fileoffset = offset; |
| this.len = len; |
| } |
| |
| public void writeTo(OutputStream out) throws IOException { |
| if (root.file != null && root.buffer == null) { |
| try (InputStream is = getInputStream()) { |
| byte[] buff = new byte[1024]; |
| int ret; |
| while ((ret = is.read(buff)) != -1) { |
| out.write(buff, 0, ret); |
| } |
| } |
| } else |
| out.write(array(), (int) arrayOffset(), (int) capacity()); |
| } |
| |
| public InputStream getInputStream() { |
| if (root.file != null && root.buffer == null) { |
| try { |
| return new RandomFileInputStream(); |
| } catch (IOException e) { |
| //e.printStackTrace(); |
| return null; |
| } |
| } |
| return new ByteArrayInputStream(array(), |
| (int)arrayOffset(), (int)capacity()); |
| } |
| |
| public ModelByteBuffer subbuffer(long beginIndex) { |
| return subbuffer(beginIndex, capacity()); |
| } |
| |
| public ModelByteBuffer subbuffer(long beginIndex, long endIndex) { |
| return subbuffer(beginIndex, endIndex, false); |
| } |
| |
| public ModelByteBuffer subbuffer(long beginIndex, long endIndex, |
| boolean independent) { |
| return new ModelByteBuffer(this, beginIndex, endIndex, independent); |
| } |
| |
| public byte[] array() { |
| return root.buffer; |
| } |
| |
| public long arrayOffset() { |
| if (root != this) |
| return root.arrayOffset() + offset; |
| return offset; |
| } |
| |
| public long capacity() { |
| return len; |
| } |
| |
| public ModelByteBuffer getRoot() { |
| return root; |
| } |
| |
| public File getFile() { |
| return file; |
| } |
| |
| public long getFilePointer() { |
| return fileoffset; |
| } |
| |
| public static void loadAll(Collection<ModelByteBuffer> col) |
| throws IOException { |
| File selfile = null; |
| RandomAccessFile raf = null; |
| try { |
| for (ModelByteBuffer mbuff : col) { |
| mbuff = mbuff.root; |
| if (mbuff.file == null) |
| continue; |
| if (mbuff.buffer != null) |
| continue; |
| if (selfile == null || !selfile.equals(mbuff.file)) { |
| if (raf != null) { |
| raf.close(); |
| raf = null; |
| } |
| selfile = mbuff.file; |
| raf = new RandomAccessFile(mbuff.file, "r"); |
| } |
| raf.seek(mbuff.fileoffset); |
| byte[] buffer = new byte[(int) mbuff.capacity()]; |
| |
| int read = 0; |
| int avail = buffer.length; |
| while (read != avail) { |
| if (avail - read > 65536) { |
| raf.readFully(buffer, read, 65536); |
| read += 65536; |
| } else { |
| raf.readFully(buffer, read, avail - read); |
| read = avail; |
| } |
| |
| } |
| |
| mbuff.buffer = buffer; |
| mbuff.offset = 0; |
| } |
| } finally { |
| if (raf != null) |
| raf.close(); |
| } |
| } |
| |
| public void load() throws IOException { |
| if (root != this) { |
| root.load(); |
| return; |
| } |
| if (buffer != null) |
| return; |
| if (file == null) { |
| throw new IllegalStateException( |
| "No file associated with this ByteBuffer!"); |
| } |
| |
| DataInputStream is = new DataInputStream(getInputStream()); |
| buffer = new byte[(int) capacity()]; |
| offset = 0; |
| is.readFully(buffer); |
| is.close(); |
| |
| } |
| |
| public void unload() { |
| if (root != this) { |
| root.unload(); |
| return; |
| } |
| if (file == null) { |
| throw new IllegalStateException( |
| "No file associated with this ByteBuffer!"); |
| } |
| root.buffer = null; |
| } |
| } |