X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr_input.cpp;h=e7b53bb8c60ee7e537969fa22378f555de3ac52e;hp=b9cda5b776a49623bdedf10de820ba8e655377ef;hb=f85e35e129f2395cb03867feb804e5a4badc594e;hpb=4a0db319fc69dbada6270866b5ef9c638f3e653d

diff --git a/ycbcr_input.cpp b/ycbcr_input.cpp
index b9cda5b..e7b53bb 100644
--- a/ycbcr_input.cpp
+++ b/ycbcr_input.cpp
@@ -56,6 +56,10 @@ YCbCrInput::YCbCrInput(const ImageFormat &image_format,
 	}
 
 	register_int("needs_mipmaps", &needs_mipmaps);
+	register_uniform_mat3("inv_ycbcr_matrix", &uniform_ycbcr_matrix);
+	register_uniform_vec3("offset", uniform_offset);
+	register_uniform_vec2("cb_offset", (float *)&uniform_cb_offset);
+	register_uniform_vec2("cr_offset", (float *)&uniform_cr_offset);
 }
 
 YCbCrInput::~YCbCrInput()
@@ -67,6 +71,18 @@ YCbCrInput::~YCbCrInput()
 
 void YCbCrInput::set_gl_state(GLuint glsl_program_num, const string& prefix, unsigned *sampler_num)
 {
+	compute_ycbcr_matrix(ycbcr_format, uniform_offset, &uniform_ycbcr_matrix, type);
+
+	uniform_cb_offset.x = compute_chroma_offset(
+		ycbcr_format.cb_x_position, ycbcr_format.chroma_subsampling_x, widths[1]);
+	uniform_cb_offset.y = compute_chroma_offset(
+		ycbcr_format.cb_y_position, ycbcr_format.chroma_subsampling_y, heights[1]);
+
+	uniform_cr_offset.x = compute_chroma_offset(
+		ycbcr_format.cr_x_position, ycbcr_format.chroma_subsampling_x, widths[2]);
+	uniform_cr_offset.y = compute_chroma_offset(
+		ycbcr_format.cr_y_position, ycbcr_format.chroma_subsampling_y, heights[2]);
+
 	for (unsigned channel = 0; channel < num_channels; ++channel) {
 		glActiveTexture(GL_TEXTURE0 + *sampler_num + channel);
 		check_error();
@@ -139,7 +155,9 @@ void YCbCrInput::set_gl_state(GLuint glsl_program_num, const string& prefix, uns
 
 	// Bind samplers.
 	uniform_tex_y = *sampler_num + 0;
-	uniform_tex_cb = *sampler_num + 1;
+	if (ycbcr_input_splitting != YCBCR_INPUT_INTERLEAVED) {
+		uniform_tex_cb = *sampler_num + 1;
+	}
 	if (ycbcr_input_splitting == YCBCR_INPUT_PLANAR) {
 		uniform_tex_cr = *sampler_num + 2;
 	}
@@ -149,55 +167,40 @@ void YCbCrInput::set_gl_state(GLuint glsl_program_num, const string& prefix, uns
 
 string YCbCrInput::output_fragment_shader()
 {
-	float offset[3];
-	Matrix3d ycbcr_to_rgb;
-	compute_ycbcr_matrix(ycbcr_format, offset, &ycbcr_to_rgb);
-
-	if (type == GL_UNSIGNED_SHORT) {
-		// For 10-bit or 12-bit packed into 16-bit, we need to scale the values
-		// so that the max value goes from 1023 (or 4095) to 65535. We do this
-		// by folding the scaling into the conversion matrix, so it comes essentially
-		// for free. However, the offset is before the scaling (and thus assumes
-		// correctly scaled values), so we need to adjust that the other way.
-		double scale = 65535.0 / (ycbcr_format.num_levels - 1);
-		offset[0] /= scale;
-		offset[1] /= scale;
-		offset[2] /= scale;
-		ycbcr_to_rgb *= scale;
-	}
-
 	string frag_shader;
 
-	frag_shader = output_glsl_mat3("PREFIX(inv_ycbcr_matrix)", ycbcr_to_rgb);
-	frag_shader += output_glsl_vec3("PREFIX(offset)", offset[0], offset[1], offset[2]);
-
-	float cb_offset_x = compute_chroma_offset(
-		ycbcr_format.cb_x_position, ycbcr_format.chroma_subsampling_x, widths[1]);
-	float cb_offset_y = compute_chroma_offset(
-		ycbcr_format.cb_y_position, ycbcr_format.chroma_subsampling_y, heights[1]);
-	frag_shader += output_glsl_vec2("PREFIX(cb_offset)", cb_offset_x, cb_offset_y);
-
-	float cr_offset_x = compute_chroma_offset(
-		ycbcr_format.cr_x_position, ycbcr_format.chroma_subsampling_x, widths[2]);
-	float cr_offset_y = compute_chroma_offset(
-		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_INTERLEAVED) {
 		frag_shader += "#define Y_CB_CR_SAME_TEXTURE 1\n";
 	} else if (ycbcr_input_splitting == YCBCR_INPUT_SPLIT_Y_AND_CBCR) {
+		cb_cr_offsets_equal =
+			(fabs(ycbcr_format.cb_x_position - ycbcr_format.cr_x_position) < 1e-6) &&
+			(fabs(ycbcr_format.cb_y_position - ycbcr_format.cr_y_position) < 1e-6);
 		char buf[256];
 		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));
+			cb_cr_offsets_equal);
 		frag_shader += buf;
 	} else {
 		frag_shader += "#define Y_CB_CR_SAME_TEXTURE 0\n#define CB_CR_SAME_TEXTURE 0\n";
 	}
 
 	frag_shader += read_file("ycbcr_input.frag");
+	frag_shader += "#undef CB_CR_SAME_TEXTURE\n#undef Y_CB_CR_SAME_TEXTURE\n";
 	return frag_shader;
 }
 
+void YCbCrInput::change_ycbcr_format(const YCbCrFormat &ycbcr_format)
+{
+	if (cb_cr_offsets_equal) {
+		assert((fabs(ycbcr_format.cb_x_position - ycbcr_format.cr_x_position) < 1e-6) &&
+		       (fabs(ycbcr_format.cb_y_position - ycbcr_format.cr_y_position) < 1e-6));
+	}
+	if (ycbcr_input_splitting == YCBCR_INPUT_INTERLEAVED) {
+		assert(ycbcr_format.chroma_subsampling_x == 1);
+		assert(ycbcr_format.chroma_subsampling_y == 1);
+	}
+	this->ycbcr_format = ycbcr_format;
+}
+
 void YCbCrInput::invalidate_pixel_data()
 {
 	for (unsigned channel = 0; channel < 3; ++channel) {