--- /dev/null
+// 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
projects / movit / blobdiff