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Add experimental RGB32 -> YUV420P conversion

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Tux3 / Mlkj / !Lev.uXFMLA 2014-07-12 14:41:42 +02:00
parent 5458b4b3ee
commit 96268a28d0
1 changed files with 41 additions and 2 deletions
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43
widget/camera.cpp
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@ -263,8 +263,47 @@ vpx_image Camera::getLastVPXImage()
}
else if (frameFormat == QVideoFrame::Format_RGB32 || frameFormat == QVideoFrame::Format_ARGB32)
{
img.w = img.h = 0; // Invalid frame. TODO: Implement conversion
qWarning() << "Camera: Can't convert from RGB32! Go complain at github.com/tux3/toxgui";
qWarning() << "Camera::getLastVPXImage: Using experimental RGB32 conversion code";
uint8_t* rgb = lastFrame.bits();
size_t i=0, j=0;
for( size_t line = 0; line < h; ++line )
{
if( !(line % 2) )
{
for( size_t x = 0; x < w; x += 2 )
{
uint8_t r = rgb[4 * i + 1];
uint8_t g = rgb[4 * i + 2];
uint8_t b = rgb[4 * i + 3];
img.planes[VPX_PLANE_Y][i] = ((66*r + 129*g + 25*b) >> 8) + 16;
img.planes[VPX_PLANE_U][j] = ((-38*r + -74*g + 112*b) >> 8) + 128;
img.planes[VPX_PLANE_V][j] = ((112*r + -94*g + -18*b) >> 8) + 128;
i++;
j++;
r = rgb[4 * i + 1];
g = rgb[4 * i + 2];
b = rgb[4 * i + 3];
img.planes[VPX_PLANE_Y][i] = ((66*r + 129*g + 25*b) >> 8) + 16;
i++;
}
}
else
{
for( size_t x = 0; x < w; x += 1 )
{
uint8_t r = rgb[4 * i + 1];
uint8_t g = rgb[4 * i + 2];
uint8_t b = rgb[4 * i + 3];
img.planes[VPX_PLANE_Y][i] = ((66*r + 129*g + 25*b) >> 8) + 16;
i++;
}
}
}
}
lastFrame.unmap();