boofcv.core.encoding.ImplConvertYV12 Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of ip Show documentation
BoofCV is an open source Java library for real-time computer vision and robotics applications.
There is a newer version: 0.26
/*
 * 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.*;

/**
 * Implementations of {@link ConvertYV12}
 *
 * @author Peter Abeles
 */
public class ImplConvertYV12 {

	public static void yv12ToMultiRgb_U8(byte[] dataYV, Planar output) {

		GrayU8 R = output.getBand(0);
		GrayU8 G = output.getBand(1);
		GrayU8 B = output.getBand(2);

		final int yStride = output.width;
		final int uvStride = output.width/2;

		final int startU = yStride*output.height;
		final int offsetV = uvStride*(output.height/2);

		for( int row = 0; row < output.height; row++ ) {
			int indexY = row*yStride;
			int indexU = startU + (row/2)*uvStride;
			int indexOut = output.startIndex + row*output.stride;

			for( int col = 0; col < output.width; col++ , indexOut++ ) {
				int y = 1191*((dataYV[indexY++] & 0xFF) - 16);
				int cb = (dataYV[ indexU ] & 0xFF) - 128;
				int cr = (dataYV[ indexU+offsetV] & 0xFF) - 128;

				if( y < 0 ) y = 0;

				int r = (y + 1836*cr) >> 10;
				int g = (y - 547*cr - 218*cb) >> 10;
				int b = (y + 2165*cb) >> 10;

				if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
				if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
				if( b < 0 ) b = 0; else if( b > 255 ) b = 255;

				R.data[indexOut] = (byte)r;
				G.data[indexOut] = (byte)g;
				B.data[indexOut] = (byte)b;

				indexU += col&0x1;
			}
		}
	}

	public static void yv12ToInterleaved(byte[] dataYV, InterleavedU8 output) {

		final int yStride = output.width;
		final int uvStride = output.width/2;

		final int startU = yStride*output.height;
		final int offsetV = uvStride*(output.height/2);

		for( int row = 0; row < output.height; row++ ) {
			int indexY = row*yStride;
			int indexU = startU + (row/2)*uvStride;
			int indexOut = output.startIndex + row*output.stride;

			for( int col = 0; col < output.width; col++ ) {
				int y = 1191*((dataYV[indexY++] & 0xFF) - 16);
				int cb = (dataYV[ indexU ] & 0xFF) - 128;
				int cr = (dataYV[ indexU+offsetV] & 0xFF) - 128;

				if( y < 0 ) y = 0;

				int r = (y + 1836*cr) >> 10;
				int g = (y - 547*cr - 218*cb) >> 10;
				int b = (y + 2165*cb) >> 10;

				if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
				if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
				if( b < 0 ) b = 0; else if( b > 255 ) b = 255;

				output.data[indexOut++] = (byte)r;
				output.data[indexOut++] = (byte)g;
				output.data[indexOut++] = (byte)b;

				indexU += col&0x1;
			}
		}
	}

	public static void yv12ToMultiRgb_F32(byte[] dataYV, Planar output) {

		GrayF32 R = output.getBand(0);
		GrayF32 G = output.getBand(1);
		GrayF32 B = output.getBand(2);

		final int yStride = output.width;
		final int uvStride = output.width/2;

		final int startU = yStride*output.height;
		final int offsetV = uvStride*(output.height/2);

		for( int row = 0; row < output.height; row++ ) {
			int indexY = row*yStride;
			int indexU = startU + (row/2)*uvStride;
			int indexOut = output.startIndex + row*output.stride;

			for( int col = 0; col < output.width; col++ , indexOut++ ) {
				int y = 1191*((dataYV[indexY++] & 0xFF) - 16);
				int cb = (dataYV[ indexU ] & 0xFF) - 128;
				int cr = (dataYV[ indexU+offsetV] & 0xFF) - 128;

				if( y < 0 ) y = 0;

				int r = (y + 1836*cr) >> 10;
				int g = (y - 547*cr - 218*cb) >> 10;
				int b = (y + 2165*cb) >> 10;

				if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
				if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
				if( b < 0 ) b = 0; else if( b > 255 ) b = 255;

				R.data[indexOut] = r;
				G.data[indexOut] = g;
				B.data[indexOut] = b;

				indexU += col&0x1;
			}
		}
	}

	public static void yv12ToInterleaved(byte[] dataYV, InterleavedF32 output) {

		final int yStride = output.width;
		final int uvStride = output.width/2;

		final int startU = yStride*output.height;
		final int offsetV = uvStride*(output.height/2);

		for( int row = 0; row < output.height; row++ ) {
			int indexY = row*yStride;
			int indexU = startU + (row/2)*uvStride;
			int indexOut = output.startIndex + row*output.stride;

			for( int col = 0; col < output.width; col++ ) {
				int y = 1191*((dataYV[indexY++] & 0xFF) - 16);
				int cb = (dataYV[ indexU ] & 0xFF) - 128;
				int cr = (dataYV[ indexU+offsetV] & 0xFF) - 128;

				if( y < 0 ) y = 0;

				int r = (y + 1836*cr) >> 10;
				int g = (y - 547*cr - 218*cb) >> 10;
				int b = (y + 2165*cb) >> 10;

				if( r < 0 ) r = 0; else if( r > 255 ) r = 255;
				if( g < 0 ) g = 0; else if( g > 255 ) g = 255;
				if( b < 0 ) b = 0; else if( b > 255 ) b = 255;

				output.data[indexOut++] = r;
				output.data[indexOut++] = g;
				output.data[indexOut++] = b;

				indexU += col&0x1;
			}
		}
	}
}