Allow adjusting the output Y'CbCr coefficients after finalize.

[movit] / ycbcr_conversion_effect_test.cpp

diff --git a/ycbcr_conversion_effect_test.cpp b/ycbcr_conversion_effect_test.cpp
index 10085abd5599f9d1711fdeb007f12e1585d3138d..c87626749e3e7aee178b1e37ec2526062b910e4f 100644 (file)
--- a/ycbcr_conversion_effect_test.cpp
+++ b/ycbcr_conversion_effect_test.cpp
@@ -381,4 +381,60 @@ TEST(YCbCrConversionEffectTest, OutputChunkyAndRGBA) {
        expect_equal(expected_rgba, out_rgba, 4 * width, height, 7, 255 * 0.002);
 }
 
+// Very similar to PlanarOutput.
+TEST(YCbCrConversionEffectTest, ChangeOutputFormat) {
+       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 out_y[width * height], out_cb[width * height], out_cr[width * height];
+
+       EffectChainTester tester(NULL, width, height, FORMAT_GRAYSCALE, COLORSPACE_sRGB, GAMMA_LINEAR, GL_RGBA8);
+
+       ImageFormat format;
+       format.color_space = COLORSPACE_sRGB;
+       format.gamma_curve = GAMMA_sRGB;
+
+       YCbCrFormat ycbcr_format;
+       ycbcr_format.luma_coefficients = YCBCR_REC_709;  // Deliberately wrong at first.
+       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, YCBCR_OUTPUT_PLANAR);
+
+       ycbcr_format.luma_coefficients = YCBCR_REC_601;
+       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_y, out_cb, out_cr, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
+
+       // Now change the output format to match what we gave the input, and re-run.
+       tester.get_chain()->change_ycbcr_output_format(ycbcr_format);
+       tester.run(out_y, out_cb, out_cr, GL_RED, COLORSPACE_sRGB, GAMMA_sRGB);
+
+       expect_equal(y, out_y, width, height);
+       expect_equal(cb, out_cb, width, height);
+       expect_equal(cr, out_cr, width, height);
+}
+
 }  // namespace movit