X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr_conversion_effect_test.cpp;fp=ycbcr_conversion_effect_test.cpp;h=c067baffb8fc9960dff45c62321742a42c8594fb;hp=0000000000000000000000000000000000000000;hb=80fc4a6e806e5638ae050c3020962137ca5fd76b;hpb=5f81c29e307735bbadb3c0cb06500af627b2e57a

diff --git a/ycbcr_conversion_effect_test.cpp b/ycbcr_conversion_effect_test.cpp
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+++ b/ycbcr_conversion_effect_test.cpp
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+// Unit tests for YCbCrConversionEffect. Mostly done by leveraging
+// YCbCrInput and seeing that the right thing comes out at the
+// other end.
+
+#include <epoxy/gl.h>
+#include <math.h>
+
+#include "effect_chain.h"
+#include "gtest/gtest.h"
+#include "image_format.h"
+#include "test_util.h"
+#include "util.h"
+#include "ycbcr_input.h"
+
+namespace movit {
+
+TEST(YCbCrConversionEffectTest, BasicInOut) {
+	const int width = 1;
+	const int height = 5;
+
+	// Pure-color test inputs, calculated with the formulas in Rec. 601
+	// section 2.5.4.
+	unsigned char y[width * height] = {
+		16, 235, 81, 145, 41,
+	};
+	unsigned char cb[width * height] = {
+		128, 128, 90, 54, 240,
+	};
+	unsigned char cr[width * height] = {
+		128, 128, 240, 34, 110,
+	};
+	unsigned char expected_data[width * height * 4] = {
+		// The same data, just rearranged.
+		 16, 128, 128, 255,
+		235, 128, 128, 255,
+		 81,  90, 240, 255,
+		145,  54,  34, 255,
+		 41, 240, 110, 255
+	};
+
+	unsigned char out_data[width * height * 4];
+
+	EffectChainTester tester(NULL, width, height);
+
+	ImageFormat format;
+	format.color_space = COLORSPACE_sRGB;
+	format.gamma_curve = GAMMA_sRGB;
+
+	YCbCrFormat ycbcr_format;
+	ycbcr_format.luma_coefficients = YCBCR_REC_601;
+	ycbcr_format.full_range = false;
+	ycbcr_format.num_levels = 256;
+	ycbcr_format.chroma_subsampling_x = 1;
+	ycbcr_format.chroma_subsampling_y = 1;
+	ycbcr_format.cb_x_position = 0.5f;
+	ycbcr_format.cb_y_position = 0.5f;
+	ycbcr_format.cr_x_position = 0.5f;
+	ycbcr_format.cr_y_position = 0.5f;
+
+	tester.add_ycbcr_output(format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_format);
+
+	YCbCrInput *input = new YCbCrInput(format, ycbcr_format, width, height);
+	input->set_pixel_data(0, y);
+	input->set_pixel_data(1, cb);
+	input->set_pixel_data(2, cr);
+	tester.get_chain()->add_input(input);
+
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_sRGB);
+	expect_equal(expected_data, out_data, 4 * width, height);
+}
+
+TEST(YCbCrConversionEffectTest, ClampToValidRange) {
+	const int width = 1;
+	const int height = 6;
+
+	// Some out-of-range of at-range values.
+	// Y should be clamped to 16-235 and Cb/Cr to 16-240.
+	// (Alpha should still be 255.)
+	unsigned char y[width * height] = {
+		0, 10, 16, 235, 240, 255
+	};
+	unsigned char cb[width * height] = {
+		0, 10, 16, 235, 240, 255,
+	};
+	unsigned char cr[width * height] = {
+		255, 240, 235, 16, 10, 0,
+	};
+	unsigned char expected_data[width * height * 4] = {
+		16, 16, 240, 255,
+		16, 16, 240, 255,
+		16, 16, 235, 255,
+		235, 235, 16, 255,
+		235, 240, 16, 255,
+		235, 240, 16, 255,
+	};
+
+	unsigned char out_data[width * height * 4];
+
+	EffectChainTester tester(NULL, width, height);
+
+	ImageFormat format;
+	format.color_space = COLORSPACE_sRGB;
+	format.gamma_curve = GAMMA_sRGB;
+
+	YCbCrFormat ycbcr_format;
+	ycbcr_format.luma_coefficients = YCBCR_REC_601;
+	ycbcr_format.full_range = false;
+	ycbcr_format.num_levels = 256;
+	ycbcr_format.chroma_subsampling_x = 1;
+	ycbcr_format.chroma_subsampling_y = 1;
+	ycbcr_format.cb_x_position = 0.5f;
+	ycbcr_format.cb_y_position = 0.5f;
+	ycbcr_format.cr_x_position = 0.5f;
+	ycbcr_format.cr_y_position = 0.5f;
+
+	tester.add_ycbcr_output(format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_format);
+
+	YCbCrInput *input = new YCbCrInput(format, ycbcr_format, width, height);
+	input->set_pixel_data(0, y);
+	input->set_pixel_data(1, cb);
+	input->set_pixel_data(2, cr);
+	tester.get_chain()->add_input(input);
+
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_sRGB);
+	expect_equal(expected_data, out_data, 4 * width, height);
+}
+
+TEST(YCbCrConversionEffectTest, LimitedRangeToFullRange) {
+	const int width = 1;
+	const int height = 5;
+
+	// Pure-color test inputs, calculated with the formulas in Rec. 601
+	// section 2.5.4.
+	unsigned char y[width * height] = {
+		16, 235, 81, 145, 41,
+	};
+	unsigned char cb[width * height] = {
+		128, 128, 90, 54, 240,
+	};
+	unsigned char cr[width * height] = {
+		128, 128, 240, 34, 110,
+	};
+	unsigned char expected_data[width * height * 4] = {
+		// Range now from 0-255 for all components, and values in-between
+		// also adjusted a bit.
+		  0, 128, 128, 255,
+		255, 128, 128, 255,
+		 76,  85, 255, 255,
+		150,  44,  21, 255,
+		 29, 255, 107, 255
+	};
+
+	unsigned char out_data[width * height * 4];
+
+	EffectChainTester tester(NULL, width, height);
+
+	ImageFormat format;
+	format.color_space = COLORSPACE_sRGB;
+	format.gamma_curve = GAMMA_sRGB;
+
+	YCbCrFormat ycbcr_format;
+	ycbcr_format.luma_coefficients = YCBCR_REC_601;
+	ycbcr_format.full_range = true;
+	ycbcr_format.num_levels = 256;
+	ycbcr_format.chroma_subsampling_x = 1;
+	ycbcr_format.chroma_subsampling_y = 1;
+	ycbcr_format.cb_x_position = 0.5f;
+	ycbcr_format.cb_y_position = 0.5f;
+	ycbcr_format.cr_x_position = 0.5f;
+	ycbcr_format.cr_y_position = 0.5f;
+
+	tester.add_ycbcr_output(format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_format);
+
+	ycbcr_format.full_range = false;
+	YCbCrInput *input = new YCbCrInput(format, ycbcr_format, width, height);
+	input->set_pixel_data(0, y);
+	input->set_pixel_data(1, cb);
+	input->set_pixel_data(2, cr);
+	tester.get_chain()->add_input(input);
+
+	tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_sRGB);
+	expect_equal(expected_data, out_data, 4 * width, height);
+}
+
+}  // namespace movit