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Merge pull request #12 from ChALkeR/patch-2 

QZXingFilter: add YUV420P format support
This commit is contained in:
Nikolaos Ftylitakis 2016-12-03 12:16:01 +02:00 committed by GitHub
parent d2f7748148 fe1337394e
commit 37ca7a13e1
1 changed files with 22 additions and 0 deletions
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22
examples/QZXingLive/QZXingFilter.cpp
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@ -153,6 +153,28 @@ void QZXingFilterRunnable::processVideoFrameProbed(SimpleVideoFrame & videoFrame
if(image.isNull() && videoFrame.pixelFormat == QVideoFrame::Format_BGR24)
image = QImage((uchar*)videoFrame.data.data(), videoFrame.size.width(), videoFrame.size.height(), QImage::Format_RGB888);
if(image.isNull() && videoFrame.pixelFormat == QVideoFrame::Format_YUV420P) {
image = QImage(videoFrame.size, QImage::Format_RGB32);
const uchar *data = (uchar*) videoFrame.data.data();
const int width = image.width();
const int height = image.height();
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
const uchar Y = data[y * width + x];
const uchar U = data[y * width / 4 + x / 2 + width * height];
const uchar V = data[y * width / 4 + x / 2 + width * height * 5 / 4];
const int C = (int) Y - 16;
const int D = (int) U - 128;
const int E = (int) V - 128;
image.setPixel(x, y, qRgb(
qBound(0, (298 * C + 409 * E + 128) >> 8, 255),
qBound(0, (298 * C - 100 * D - 208 * E + 128) >> 8, 255),
qBound(0, (298 * C + 516 * D + 128) >> 8, 255)
));
}
}
}
/// TODO: Handle (create QImages from) YUV formats.
if(image.isNull())