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Issue 278

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git-svn-id: https://zxing.googlecode.com/svn/trunk@1115 59b500cc-1b3d-0410-9834-0bbf25fbcc57
This commit is contained in:
srowen 2009-11-20 00:55:13 +00:00
parent dcb68910a2
commit f337db0b35
2 changed files with 52 additions and 4 deletions
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54
android/src/com/google/zxing/client/android/InterleavedYUV422LuminanceSource.java
View file

@ -31,6 +31,9 @@ import android.graphics.Bitmap;
* @author dswitkin@google.com (Daniel Switkin)
*/
public final class InterleavedYUV422LuminanceSource extends BaseLuminanceSource {
private static final int OPAQUE_ALPHA = 0xFF000000;
private final byte[] yuvData;
private final int dataWidth;
private final int dataHeight;
@ -117,13 +120,13 @@ public final class InterleavedYUV422LuminanceSource extends BaseLuminanceSource
int[] pixels = new int[width * height];
byte[] yuv = yuvData;
int dataWidth = this.dataWidth;
int inputOffset = (top * dataWidth << 1) + (left << 1);
int inputOffset = (top * dataWidth + left) << 1;
for (int y = 0; y < height; y++) {
int outputOffset = y * width;
for (int x = 0; x < width; x++) {
int grey = yuv[inputOffset + (x << 1)] & 0xff;
pixels[outputOffset + x] = (0xff000000) | (grey * 0x00010101);
pixels[outputOffset + x] = OPAQUE_ALPHA | (grey * 0x00010101);
}
inputOffset += (dataWidth << 1);
}
@ -136,6 +139,51 @@ public final class InterleavedYUV422LuminanceSource extends BaseLuminanceSource
// Not currently needed.
@Override
public Bitmap renderFullColorBitmap(boolean halfSize) {
return null;
// TODO implement halfSize
int width = getWidth();
int height = getHeight();
int[] pixels = new int[width * height];
byte[] yuv = yuvData;
int dataWidth = this.dataWidth;
int inputOffset = (top * dataWidth + left) << 1;
for (int y = 0; y < height; y++) {
int outputOffset = y * width;
for (int x = 0; x < width; x += 2) {
int localOffset = inputOffset + (x << 1);
int y1 = yuv[localOffset] & 0xFF;
int u = yuv[localOffset + 1] & 0xFF;
int y2 = yuv[localOffset + 2] & 0xFF;
int v = yuv[localOffset + 3] & 0xFF;
int rgb1 = yuvToRGB(y1, u, v);
int rgb2 = yuvToRGB(y2, u, v);
pixels[outputOffset + x] = OPAQUE_ALPHA | rgb1;
pixels[outputOffset + x + 1] = OPAQUE_ALPHA | rgb2;
}
inputOffset += (dataWidth << 1);
}
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
/**
* @link http://en.wikipedia.org/wiki/YUV#Y.27UV444
*/
private static int yuvToRGB(int y, int u, int v) {
int c = y - 16;
int d = u - 128;
int e = v - 128;
int c298 = 298 * c;
int r = clip((c298 + 409 * e + 128) >> 8);
int g = clip((c298 - 100 * d - 208 * e + 128) >> 8);
int b = clip((c298 + 516 * d + 128) >> 8);
return (r << 16) | (g << 8) | b;
}
private static int clip(int x) {
return x < 0 ? 0 : x & 0xFF;
}
}

2
android/src/com/google/zxing/client/android/PlanarYUVLuminanceSource.java
View file

@ -142,6 +142,6 @@ public final class PlanarYUVLuminanceSource extends BaseLuminanceSource {
// Can't be implemented here, as the color representations vary.
@Override
public Bitmap renderFullColorBitmap(boolean halfSize) {
return null;
throw new UnsupportedOperationException();
}
}