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Restore old code for decoding YUV420P. By mistake it was merged with changes that related to NV21(MACOS). possible fix for #143

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ftylitak 2019-10-23 22:30:11 +03:00
parent 4b7f8b6a71
commit dbc01a383c
1 changed files with 23 additions and 0 deletions
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23
src/QZXingFilter.cpp
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@ -292,6 +292,29 @@ void QZXingFilterRunnable::processVideoFrameProbed(SimpleVideoFrame & videoFrame
image_ptr = new QImage(data, width, height, QImage::Format_RGB16);
break;
case QVideoFrame::Format_YUV420P:
/// Format_YUV420P format, encountered on raspberry pi
image_ptr = new QImage(captureRect.targetWidth, captureRect.targetHeight, QImage::Format_Grayscale8);
pixel = image_ptr->bits();
wh = width * height;
w_2 = width / 2;
wh_54 = wh * 5 / 4;
for (int y = captureRect.startY; y < captureRect.endY; y++) {
const int Y_offset = y * width;
const int y_2 = y / 2;
const int U_offset = y_2 * w_2 + wh;
const int V_offset = y_2 * w_2 + wh_54;
for (int x = captureRect.startX; x < captureRect.endX; x++) {
const int x_2 = x / 2;
const uchar Y = data[Y_offset + x];
const uchar U = data[U_offset + x_2];
const uchar V = data[V_offset + x_2];
*pixel = yuvToGray(Y, U, V);
++pixel;
}
}
break;
case QVideoFrame::Format_NV12:
/// nv12 format, encountered on macOS
image_ptr = new QImage(captureRect.targetWidth, captureRect.targetHeight, QImage::Format_Grayscale8);