/*
* Copyright (c) 2011-2016, Peter Abeles. All Rights Reserved.
*
* This file is part of BoofCV (http://boofcv.org).
*
* 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 boofcv.core.encoding;
import boofcv.struct.image.*;
/**
* YUV / YCbCr image format. The Y component is contained in the width*height block, followed by a (width/2)*(height/2) block
* for Cb and then a block of the same size for Cr.
*
* @author Peter Abeles
*/
public class ConvertYV12 {
/**
* Converts a YU12 encoded byte array into a BoofCV formatted image.
*
* @param data (input) YU12 byte array
* @param width (input) image width
* @param height (input) image height
* @param output (output) BoofCV image
*/
public static void yu12ToBoof(byte[] data, int width, int height, ImageBase output) {
if( output instanceof Planar) {
Planar ms = (Planar) output;
if (ms.getBandType() == GrayU8.class) {
ImplConvertYV12.yv12ToMultiRgb_U8(data, ms);
} else if (ms.getBandType() == GrayF32.class) {
ImplConvertYV12.yv12ToMultiRgb_F32(data, ms);
} else {
throw new IllegalArgumentException("Unsupported output band format");
}
} else if( output instanceof ImageGray) {
if (output.getClass() == GrayU8.class) {
yu12ToGray(data, width, height, (GrayU8) output);
} else if (output.getClass() == GrayF32.class) {
yu12ToGray(data, width, height, (GrayF32) output);
} else {
throw new IllegalArgumentException("Unsupported output type");
}
} else if( output instanceof ImageInterleaved ) {
if( output.getClass() == InterleavedU8.class ) {
ImplConvertYV12.yv12ToInterleaved(data, (InterleavedU8) output);
} else if( output.getClass() == InterleavedF32.class ) {
ImplConvertYV12.yv12ToInterleaved(data, (InterleavedF32) output);
} else {
throw new IllegalArgumentException("Unsupported output type");
}
} else {
throw new IllegalArgumentException("Boofcv image type not yet supported");
}
}
/**
* Converts an YV12 image into a gray scale U8 image.
*
* @param data Input: YV12 image data
* @param width Input: image width
* @param height Input: image height
* @param output Output: Optional storage for output image. Can be null.
* @return Gray scale image
*/
public static GrayU8 yu12ToGray(byte[] data , int width , int height , GrayU8 output ) {
if( output != null ) {
if( output.width != width || output.height != height )
throw new IllegalArgumentException("output width and height must be "+width+" "+height);
} else {
output = new GrayU8(width,height);
}
ImplConvertNV21.nv21ToGray(data, output);
return output;
}
/**
* Converts an YV12 image into a gray scale F32 image.
*
* @param data Input: YV12 image data
* @param width Input: image width
* @param height Input: image height
* @param output Output: Optional storage for output image. Can be null.
* @return Gray scale image
*/
public static GrayF32 yu12ToGray(byte[] data , int width , int height , GrayF32 output ) {
if( output != null ) {
if( output.width != width || output.height != height )
throw new IllegalArgumentException("output width and height must be "+width+" "+height);
} else {
output = new GrayF32(width,height);
}
ImplConvertNV21.nv21ToGray(data, output);
return output;
}
}