com.zpf.tool.CameraBitmapUtil Maven / Gradle / Ivy
package com.zpf.tool;
import java.nio.ByteBuffer;
public class CameraBitmapUtil {
public static void writeRgba(int[] pixels, int imageWidth, int imageHeight, ByteBuffer buffer, boolean needRotate) {
int n;
int i;
for (int row = 0; row < imageHeight; row++) {
for (int col = 0; col < imageWidth; col++) {
i = row * imageWidth + col;
n = 4 * i;
int r = buffer.get(n) & 0xff;
int g = buffer.get(n + 1) & 0xff;
int b = buffer.get(n + 2) & 0xff;
int a = buffer.get(n + 3) & 0xff;
int color = a << 24 | r << 16 | g << 8 | b;
if (needRotate) {
i = imageHeight - 1 - row + imageHeight * col;
}
pixels[i] = color;
}
}
}
public static void writeYuv420(int[] pixels, int imageWidth, int imageHeight, ByteBuffer yBuffer, ByteBuffer uBuffer, ByteBuffer vBuffer, boolean needRotate) {
int y = 0;
int u = 0;
int v = 0;
int i;
for (int row = 0; row < imageHeight; row++) {
for (int col = 0; col < imageWidth; col++) {
i = row * imageWidth + col;
y = yBuffer.get(i) & 0xff; // Y 数组是紧密排布的
if ((col & 0x1) == 0) { // UV 每行的奇数元素是有用的，偶数位不要
int k = row / 2 * imageWidth + col;
u = uBuffer.get(k) & 0xff; // U 是两行合并一行的
v = vBuffer.get(k) & 0xff; // V 和U是一样的
}
int facter = 128;
int r = (int) (y + 1.4022 * (v - facter));
int g = (int) (y - 0.34414 * (u - facter) - 0.71414 * (v - facter));
int b = (int) (y + 1.772 * (u - facter));
r = r < 0 ? 0 : (Math.min(r, 255));
g = g < 0 ? 0 : (Math.min(g, 255));
b = b < 0 ? 0 : (Math.min(b, 255));
int color = 0xff000000 | r << 16 | g << 8 | b;
if (needRotate) {
i = imageHeight - 1 - row + imageHeight * col;
}
pixels[i] = color;
}
}
}
}