register_uniform_sampler2d("tex_y", &uniform_tex_y);
- if (ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
+ if (ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED) {
+ num_channels = 1;
+ assert(ycbcr_format.chroma_subsampling_x == 1);
+ assert(ycbcr_format.chroma_subsampling_y == 1);
+ } else if (ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
num_channels = 2;
register_uniform_sampler2d("tex_cbcr", &uniform_tex_cb);
} else {
if (texture_num[channel] == 0 && (pbos[channel] != 0 || pixel_data[channel] != NULL)) {
GLenum format, internal_format;
- if (channel == 1 && ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
+ if (channel == 0 && ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED) {
+ format = GL_RGB;
+ internal_format = GL_RGB8;
+ } else if (channel == 1 && ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
format = GL_RG;
internal_format = GL_RG8;
} else {
ycbcr_format.cr_y_position, ycbcr_format.chroma_subsampling_y, heights[2]);
frag_shader += output_glsl_vec2("PREFIX(cr_offset)", cr_offset_x, cr_offset_y);
- if (ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
+ if (ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED) {
+ frag_shader += "#define Y_CB_CR_SAME_TEXTURE 1\n";
+ } else if (ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
char buf[256];
- snprintf(buf, sizeof(buf), "#define CB_CR_SAME_TEXTURE 1\n#define CB_CR_OFFSETS_EQUAL %d\n",
+ snprintf(buf, sizeof(buf), "#define Y_CB_CR_SAME_TEXTURE 0\n#define CB_CR_SAME_TEXTURE 1\n#define CB_CR_OFFSETS_EQUAL %d\n",
(fabs(ycbcr_format.cb_x_position - ycbcr_format.cr_x_position) < 1e-6));
frag_shader += buf;
} else {
- frag_shader += "#define CB_CR_SAME_TEXTURE 0\n";
+ frag_shader += "#define Y_CB_CR_SAME_TEXTURE 0\n#define CB_CR_SAME_TEXTURE 0\n";
}
frag_shader += read_file("ycbcr_input.frag");
tc.y = 1.0 - tc.y;
vec3 ycbcr;
+#if Y_CB_CR_SAME_TEXTURE
+ ycbcr = tex2D(PREFIX(tex_y), tc).xyz;
+#else
ycbcr.x = tex2D(PREFIX(tex_y), tc).x;
-#if CB_CR_SAME_TEXTURE
-#if CB_CR_OFFSETS_EQUAL
+ #if CB_CR_SAME_TEXTURE
+ #if CB_CR_OFFSETS_EQUAL
ycbcr.yz = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).xy;
-#else
+ #else
ycbcr.y = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cb_offset)).x;
ycbcr.z = tex2D(PREFIX(tex_cbcr), tc + PREFIX(cr_offset)).x;
-#endif
-#else
+ #endif
+ #else
ycbcr.y = tex2D(PREFIX(tex_cb), tc + PREFIX(cb_offset)).x;
ycbcr.z = tex2D(PREFIX(tex_cr), tc + PREFIX(cr_offset)).x;
+ #endif
#endif
ycbcr -= PREFIX(offset);
#ifndef _MOVIT_YCBCR_INPUT_H
#define _MOVIT_YCBCR_INPUT_H 1
-// YCbCrInput is for handling planar 8-bit Y'CbCr (also sometimes, usually rather
-// imprecisely, called “YUV”), which is typically what you get from a video decoder.
-// It upsamples planes as needed, using the default linear upsampling OpenGL gives you.
+// YCbCrInput is for handling planar or 4:4:4 interleaved 8-bit Y'CbCr
+// (also sometimes, usually rather imprecisely, called “YUV”), which is typically
+// what you get from a video decoder. It upsamples planes as needed, using the
+// default linear upsampling OpenGL gives you.
#include <epoxy/gl.h>
#include <assert.h>
class ResourcePool;
-// Whether the data is fully planar (Y', Cb and Cr in one texture each)
-// or not. Note that this input does currently not support fully interleaved
-// data (Y', Cb and Cr next to each other), as 4:4:4 interleaved Y'CbCr seems
-// to be rare; however, YCbCr422InterleavedInput supports the important special
+// Whether the data is planar (Y', Cb and Cr in one texture each)
+// or not. Note that YCbCr422InterleavedInput supports the important special
// case of 4:2:2 interleaved.
enum YCbCrInputSplitting {
// The standard, default case; Y', Cb and Cr in one texture each.
// If you specify this mode, the “Cr” pointer texture will be unused
// (the ”Cb” texture contains both).
YCBCR_INPUT_SPLIT_Y_AND_CBCR,
+
+ // Y', Cb and Cr interleaved in the same texture (the “Y” texture;
+ // “Cb” and “Cr” are unused). This means you cannot have any subsampling;
+ // 4:4:4 only.
+ YCBCR_INPUT_INTERLEAVED,
};
class YCbCrInput : public Input {
expect_equal(expected_data, out_data, 4 * width, height, 0.025, 0.002);
}
+TEST(YCbCrInputTest, Interleaved444) {
+ const int width = 1;
+ const int height = 5;
+
+ // Same data as Simple444, just rearranged.
+ unsigned char data[width * height * 3] = {
+ 16, 128, 128,
+ 235, 128, 128,
+ 81, 90, 240,
+ 145, 54, 34,
+ 41, 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_INTERLEAVED);
+ input->set_pixel_data(0, data);
+ 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);
+}
+
TEST(YCbCrInputTest, FullRangeRec601) {
const int width = 1;
const int height = 5;