| /* |
| * Copyright 2013 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 java.nio.ByteBuffer; |
| |
| /** |
| * Utility functions to convert between color-spaces. |
| * |
| * Currently these methods are all CPU based native methods. These could be updated in the future |
| * to provide other implementations. |
| */ |
| public class ColorSpace { |
| |
| /** |
| * Convert YUV420-Planer data to RGBA8888. |
| * |
| * The input data is expected to be laid out in 3 planes. The width x height Y plane, followed |
| * by the U and V planes, where each chroma value corresponds to a 2x2 luminance value block. |
| * YUV to RGB conversion is done using the ITU-R BT.601 transformation. The output buffer must |
| * be large enough to hold the data, and the dimensions must be multiples of 2. |
| * |
| * @param input data encoded in YUV420-Planar. |
| * @param output buffer to hold RGBA8888 data. |
| * @param width the width of the image (must be a multiple of 2) |
| * @param height the height of the image (must be a multiple of 2) |
| */ |
| public static void convertYuv420pToRgba8888( |
| ByteBuffer input, ByteBuffer output, int width, int height) { |
| expectInputSize(input, (3 * width * height) / 2); |
| expectOutputSize(output, width * height * 4); |
| nativeYuv420pToRgba8888(input, output, width, height); |
| } |
| |
| /** |
| * Convert ARGB8888 to RGBA8888. |
| * |
| * The input data is expected to be encoded in 8-bit interleaved ARGB channels. The output |
| * buffer must be large enough to hold the data. The output buffer may be the same as the |
| * input buffer. |
| * |
| * @param input data encoded in ARGB8888. |
| * @param output buffer to hold RGBA8888 data. |
| * @param width the width of the image |
| * @param height the height of the image |
| */ |
| public static void convertArgb8888ToRgba8888( |
| ByteBuffer input, ByteBuffer output, int width, int height) { |
| expectInputSize(input, width * height * 4); |
| expectOutputSize(output, width * height * 4); |
| nativeArgb8888ToRgba8888(input, output, width, height); |
| } |
| |
| /** |
| * Convert RGBA8888 to HSVA8888. |
| * |
| * The input data is expected to be encoded in 8-bit interleaved RGBA channels. The output |
| * buffer must be large enough to hold the data. The output buffer may be the same as the |
| * input buffer. |
| * |
| * @param input data encoded in RGBA8888. |
| * @param output buffer to hold HSVA8888 data. |
| * @param width the width of the image |
| * @param height the height of the image |
| */ |
| public static void convertRgba8888ToHsva8888( |
| ByteBuffer input, ByteBuffer output, int width, int height) { |
| expectInputSize(input, width * height * 4); |
| expectOutputSize(output, width * height * 4); |
| nativeRgba8888ToHsva8888(input, output, width, height); |
| } |
| |
| /** |
| * Convert RGBA8888 to YCbCrA8888. |
| * |
| * The input data is expected to be encoded in 8-bit interleaved RGBA channels. The output |
| * buffer must be large enough to hold the data. The output buffer may be the same as the |
| * input buffer. |
| * |
| * @param input data encoded in RGBA8888. |
| * @param output buffer to hold YCbCrA8888 data. |
| * @param width the width of the image |
| * @param height the height of the image |
| */ |
| public static void convertRgba8888ToYcbcra8888( |
| ByteBuffer input, ByteBuffer output, int width, int height) { |
| expectInputSize(input, width * height * 4); |
| expectOutputSize(output, width * height * 4); |
| nativeRgba8888ToYcbcra8888(input, output, width, height); |
| } |
| |
| private static void expectInputSize(ByteBuffer input, int expectedSize) { |
| if (input.remaining() < expectedSize) { |
| throw new IllegalArgumentException("Input buffer's size does not fit given width " |
| + "and height! Expected: " + expectedSize + ", Got: " + input.remaining() |
| + "."); |
| } |
| } |
| |
| private static void expectOutputSize(ByteBuffer output, int expectedSize) { |
| if (output.remaining() < expectedSize) { |
| throw new IllegalArgumentException("Output buffer's size does not fit given width " |
| + "and height! Expected: " + expectedSize + ", Got: " + output.remaining() |
| + "."); |
| } |
| } |
| |
| private static native void nativeYuv420pToRgba8888( |
| ByteBuffer input, ByteBuffer output, int width, int height); |
| |
| private static native void nativeArgb8888ToRgba8888( |
| ByteBuffer input, ByteBuffer output, int width, int height); |
| |
| private static native void nativeRgba8888ToHsva8888( |
| ByteBuffer input, ByteBuffer output, int width, int height); |
| |
| private static native void nativeRgba8888ToYcbcra8888( |
| ByteBuffer input, ByteBuffer output, int width, int height); |
| |
| static { |
| System.loadLibrary("smartcamera_jni"); |
| } |
| |
| } |