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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2020, Sebastian Fricke
*
* bayer_format.cpp - BayerFormat class tests
*/
#include <iostream>
#include <libcamera/transform.h>
#include "libcamera/internal/bayer_format.h"
#include "test.h"
using namespace std;
using namespace libcamera;
class BayerFormatTest : public Test
{
protected:
int run()
{
/* An empty Bayer format has to be invalid. */
BayerFormat bayerFmt;
if (bayerFmt.isValid()) {
cerr << "An empty BayerFormat has to be invalid."
<< endl;
return TestFail;
}
/* A correct Bayer format has to be valid. */
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
if (!bayerFmt.isValid()) {
cerr << "A correct BayerFormat has to be valid."
<< endl;
return TestFail;
}
/*
* Two bayer formats created with the same order and bit depth
* have to be equal.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
BayerFormat bayerFmtExpect = BayerFormat(BayerFormat::BGGR, 8,
BayerFormat::Packing::None);
if (bayerFmt != bayerFmtExpect) {
cerr << "Comparison of identical formats failed."
<< endl;
return TestFail;
}
/*
* Two Bayer formats created with the same order but with a
* different bitDepth are not equal.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
bayerFmtExpect = BayerFormat(BayerFormat::BGGR, 12,
BayerFormat::Packing::None);
if (bayerFmt == bayerFmtExpect) {
cerr << "Comparison of different formats failed."
<< endl;
return TestFail;
}
/*
* Create a Bayer format with a V4L2PixelFormat and check if we
* get the same format after converting back to the V4L2 Format.
*/
V4L2PixelFormat v4l2FmtExpect = V4L2PixelFormat(
V4L2_PIX_FMT_SBGGR8);
bayerFmt = BayerFormat::fromV4L2PixelFormat(v4l2FmtExpect);
V4L2PixelFormat v4l2Fmt = bayerFmt.toV4L2PixelFormat();
if (v4l2Fmt != v4l2FmtExpect) {
cerr << "Expected: '" << v4l2FmtExpect.toString()
<< "' got: '" << v4l2Fmt.toString() << "'" << endl;
return TestFail;
}
/*
* Use an empty Bayer format and verify that no matching
* V4L2PixelFormat is found.
*/
v4l2FmtExpect = V4L2PixelFormat();
bayerFmt = BayerFormat();
v4l2Fmt = bayerFmt.toV4L2PixelFormat();
if (v4l2Fmt != v4l2FmtExpect) {
cerr << "Expected: empty V4L2PixelFormat got: '"
<< v4l2Fmt.toString() << "'" << endl;
return TestFail;
}
/*
* Check if we get the expected Bayer format BGGR8
* when we convert the V4L2PixelFormat (V4L2_PIX_FMT_SBGGR8)
* to a Bayer format.
*/
bayerFmtExpect = BayerFormat(BayerFormat::BGGR, 8,
BayerFormat::Packing::None);
v4l2Fmt = V4L2PixelFormat(V4L2_PIX_FMT_SBGGR8);
bayerFmt = BayerFormat::fromV4L2PixelFormat(v4l2Fmt);
if (bayerFmt != bayerFmtExpect) {
cerr << "Expected BayerFormat '"
<< bayerFmtExpect.toString() << "', got: '"
<< bayerFmt.toString() << "'" << endl;
return TestFail;
}
/*
* Confirm that a V4L2PixelFormat that is not found in
* the conversion table, doesn't yield a Bayer format.
*/
V4L2PixelFormat v4l2FmtUnknown = V4L2PixelFormat(
V4L2_PIX_FMT_BGRA444);
bayerFmt = BayerFormat::fromV4L2PixelFormat(v4l2FmtUnknown);
if (bayerFmt.isValid()) {
cerr << "Expected empty BayerFormat got: '"
<< bayerFmt.toString() << "'" << endl;
return TestFail;
}
/*
* Test if a valid Bayer format can be converted to a
* string representation.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
if (bayerFmt.toString() != "BGGR-8") {
cerr << "String representation != 'BGGR-8' (got: '"
<< bayerFmt.toString() << "' ) " << endl;
return TestFail;
}
/*
* Determine if an empty Bayer format results in no
* string representation.
*/
bayerFmt = BayerFormat();
if (bayerFmt.toString() != "INVALID") {
cerr << "String representation != 'INVALID' (got: '"
<< bayerFmt.toString() << "' ) " << endl;
return TestFail;
}
/*
* Perform a horizontal Flip and make sure that the
* order is adjusted accordingly.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
bayerFmtExpect = BayerFormat(BayerFormat::GBRG, 8,
BayerFormat::Packing::None);
BayerFormat hFlipFmt = bayerFmt.transform(Transform::HFlip);
if (hFlipFmt != bayerFmtExpect) {
cerr << "Horizontal flip of 'BGGR-8' should result in '"
<< bayerFmtExpect.toString() << "', got: '"
<< hFlipFmt.toString() << "'" << endl;
return TestFail;
}
/*
* Perform a vertical Flip and make sure that
* the order is adjusted accordingly.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
bayerFmtExpect = BayerFormat(BayerFormat::GRBG, 8,
BayerFormat::Packing::None);
BayerFormat vFlipFmt = bayerFmt.transform(Transform::VFlip);
if (vFlipFmt != bayerFmtExpect) {
cerr << "Vertical flip of 'BGGR-8' should result in '"
<< bayerFmtExpect.toString() << "', got: '"
<< vFlipFmt.toString() << "'" << endl;
return TestFail;
}
/*
* Perform a transposition on a pixel order with both green
* pixels on the bottom left to top right diagonal and make
* sure, that it doesn't change.
*/
bayerFmt = BayerFormat(BayerFormat::BGGR, 8, BayerFormat::Packing::None);
BayerFormat transposeFmt = bayerFmt.transform(
Transform::Transpose);
if (transposeFmt != bayerFmt) {
cerr << "Transpose with both green pixels on the "
<< "antidiagonal should not change the order "
<< "(got '" << transposeFmt.toString() << "')"
<< endl;
return TestFail;
}
/*
* Perform a transposition on an pixel order with red and blue
* on the bottom left to top right diagonal and make sure
* that their positions are switched.
*/
bayerFmt = BayerFormat(BayerFormat::GBRG, 8, BayerFormat::Packing::None);
bayerFmtExpect = BayerFormat(BayerFormat::GRBG, 8,
BayerFormat::Packing::None);
transposeFmt = bayerFmt.transform(Transform::Transpose);
if (transposeFmt != bayerFmtExpect) {
cerr << "Transpose with the red & blue pixels on the "
<< "antidiagonal should switch their position "
<< "(got '" << transposeFmt.toString() << "')"
<< endl;
return TestFail;
}
return TestPass;
}
};
TEST_REGISTER(BayerFormatTest)