Add a mode for YCbCrInput where Cb and Cr are in the same texture.

[movit] / ycbcr_input_test.cpp

diff --git a/ycbcr_input_test.cpp b/ycbcr_input_test.cpp
index 873a6c5f132c3b0e5a303e4192d5905f0c69c049..8b69e879ff0b2537469cc5f4a175c0eb06dce56d 100644 (file)
--- a/ycbcr_input_test.cpp
+++ b/ycbcr_input_test.cpp
@@ -484,4 +484,58 @@ TEST(YCbCrInputTest, PBO) {
        glDeleteBuffers(1, &pbo);
 }
 
+TEST(YCbCrInputTest, CombinedCbAndCr) {
+       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_cr[width * height * 2] = {
+               128, 128,
+               128, 128,
+                90, 240,
+                54,  34,
+               240, 110,
+       };
+       float expected_data[4 * width * height] = {
+               0.0, 0.0, 0.0, 1.0,
+               1.0, 1.0, 1.0, 1.0,
+               1.0, 0.0, 0.0, 1.0,
+               0.0, 1.0, 0.0, 1.0,
+               0.0, 0.0, 1.0, 1.0,
+       };
+       float out_data[4 * width * height];
+
+       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;
+
+       YCbCrInput *input = new YCbCrInput(format, ycbcr_format, width, height, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
+       input->set_pixel_data(0, y);
+       input->set_pixel_data(1, cb_cr);
+       tester.get_chain()->add_input(input);
+
+       tester.run(out_data, GL_RGBA, COLORSPACE_sRGB, GAMMA_sRGB);
+
+       // Y'CbCr isn't 100% accurate (the input values are rounded),
+       // so we need some leeway.
+       expect_equal(expected_data, out_data, 4 * width, height, 0.025, 0.002);
+}
+
 }  // namespace movit