165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/* 265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Copyright (C) 2011 The Android Open Source Project 365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Licensed under the Apache License, Version 2.0 (the "License"); 565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * you may not use this file except in compliance with the License. 665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * You may obtain a copy of the License at 765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * http://www.apache.org/licenses/LICENSE-2.0 965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 1065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Unless required by applicable law or agreed to in writing, software 1165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * distributed under the License is distributed on an "AS IS" BASIS, 1265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * See the License for the specific language governing permissions and 1465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * limitations under the License. 1565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 1665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpackage android.filterfw.core; 1965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.Frame; 2165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/** 2365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * @hide 2465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 2565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpublic class NativeBuffer { 2665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // These are set by the native layer 2865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private long mDataPointer = 0; 2965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private int mSize = 0; 3065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private Frame mAttachedFrame; 3265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private boolean mOwnsData = false; 3465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private int mRefCount = 1; 3565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public NativeBuffer() { 3765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 3865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public NativeBuffer(int count) { 4065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn allocate(count * getElementSize()); 4165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mOwnsData = true; 4265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 4365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public NativeBuffer mutableCopy() { 4565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn NativeBuffer result = null; 4665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn try { 4765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Class myClass = getClass(); 4865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn result = (NativeBuffer)myClass.newInstance(); 4965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } catch (Exception e) { 5065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException("Unable to allocate a copy of " + getClass() + "! Make " + 5165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "sure the class has a default constructor!"); 5265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mSize > 0 && !nativeCopyTo(result)) { 5465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException("Failed to copy NativeBuffer to mutable instance!"); 5565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return result; 5765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 5965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public int size() { 6065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return mSize; 6165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 6265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public int count() { 6465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return (mDataPointer != 0) ? mSize / getElementSize() : 0; 6565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 6665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public int getElementSize() { 6865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return 1; 6965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 7165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public NativeBuffer retain() { 7265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mAttachedFrame != null) { 7365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mAttachedFrame.retain(); 7465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } else if (mOwnsData) { 7565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn ++mRefCount; 7665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return this; 7865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 7965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 8065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public NativeBuffer release() { 8165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Decrement refcount 8265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn boolean doDealloc = false; 8365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mAttachedFrame != null) { 8465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn doDealloc = (mAttachedFrame.release() == null); 8565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } else if (mOwnsData) { 8665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn --mRefCount; 8765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn doDealloc = (mRefCount == 0); 8865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Deallocate if necessary 9165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (doDealloc) { 9265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn deallocate(mOwnsData); 9365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return null; 9465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } else { 9565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return this; 9665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public boolean isReadOnly() { 10065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return (mAttachedFrame != null) ? mAttachedFrame.isReadOnly() : false; 10165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 10265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn static { 10465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn System.loadLibrary("filterfw"); 10565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 10665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn void attachToFrame(Frame frame) { 10865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // We do not auto-retain. We expect the user to call retain() if they want to hold on to 10965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // the frame. 11065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mAttachedFrame = frame; 11165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 11365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected void assertReadable() { 11465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mDataPointer == 0 || mSize == 0 11565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn || (mAttachedFrame != null && !mAttachedFrame.hasNativeAllocation())) { 11665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new NullPointerException("Attempting to read from null data frame!"); 11765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 12065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn protected void assertWritable() { 12165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (isReadOnly()) { 12265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException("Attempting to modify read-only native (structured) data!"); 12365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 12465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 12565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 12665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private native boolean allocate(int size); 12765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private native boolean deallocate(boolean ownsData); 12865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private native boolean nativeCopyTo(NativeBuffer buffer); 12965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 130