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libcamera: formats: add numPlanes helper

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Determine the number of planes used by a format by counting the number
of PixelFormatPlaneInfo entries with a valid entry.

Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2020-07-23 11:19:38 +01:00
parent 000257a707
commit 38ca814e97
2 changed files with 20 additions and 0 deletions
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18
src/libcamera/formats.cpp
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@ -821,4 +821,22 @@ PixelFormatInfo::frameSize(const Size &size,
return sum;
}
/**
* \brief Retrieve the number of planes represented by the format
* \return The number of planes used by the format
*/
unsigned int PixelFormatInfo::numPlanes() const
{
unsigned int count = 0;
for (const PixelFormatPlaneInfo &p : planes) {
if (p.bytesPerGroup == 0)
break;
count++;
}
return count;
}
} /* namespace libcamera */