| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.media.filterfw; |
| |
| import android.annotation.TargetApi; |
| import android.renderscript.Allocation; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| public class FrameBuffer1D extends Frame { |
| |
| private int mLength = 0; |
| |
| /** |
| * Access frame's data using a {@link ByteBuffer}. |
| * This is a convenience method and is equivalent to calling {@code lockData} with an |
| * {@code accessFormat} of {@code ACCESS_BYTES}. |
| * When writing to the {@link ByteBuffer}, the byte order should be always set to |
| * {@link ByteOrder#nativeOrder()}. |
| * |
| * @return The byte buffer instance holding the Frame's data. |
| */ |
| public ByteBuffer lockBytes(int mode) { |
| assertAccessible(mode); |
| return (ByteBuffer)mBackingStore.lockData(mode, BackingStore.ACCESS_BYTES); |
| } |
| |
| /** |
| * Access frame's data using a RenderScript {@link Allocation}. |
| * This is a convenience method and is equivalent to calling {@code lockData} with an |
| * {@code accessFormat} of {@code ACCESS_ALLOCATION}. |
| * |
| * @return The Allocation instance holding the Frame's data. |
| */ |
| @TargetApi(11) |
| public Allocation lockAllocation(int mode) { |
| assertAccessible(mode); |
| return (Allocation) mBackingStore.lockData(mode, BackingStore.ACCESS_ALLOCATION); |
| } |
| |
| public int getLength() { |
| return mLength; |
| } |
| |
| @Override |
| public int[] getDimensions() { |
| return super.getDimensions(); |
| } |
| |
| /** |
| * TODO: Documentation. Note that frame contents are invalidated. |
| */ |
| @Override |
| public void resize(int[] newDimensions) { |
| super.resize(newDimensions); |
| } |
| |
| static FrameBuffer1D create(BackingStore backingStore) { |
| assertCanCreate(backingStore); |
| return new FrameBuffer1D(backingStore); |
| } |
| |
| FrameBuffer1D(BackingStore backingStore) { |
| super(backingStore); |
| updateLength(backingStore.getDimensions()); |
| } |
| |
| static void assertCanCreate(BackingStore backingStore) { |
| FrameType type = backingStore.getFrameType(); |
| if (type.getElementSize() == 0) { |
| throw new RuntimeException("Cannot access Frame of type " + type + " as a FrameBuffer " |
| + "instance!"); |
| } |
| int[] dims = backingStore.getDimensions(); |
| if (dims == null || dims.length == 0) { |
| throw new RuntimeException("Cannot access Frame with no dimensions as a FrameBuffer " |
| + "instance!"); |
| } |
| } |
| |
| void updateLength(int[] dimensions) { |
| mLength = 1; |
| for (int dim : dimensions) { |
| mLength *= dim; |
| } |
| } |
| } |
| |