Allow YCbCrInput to change input format after finalize.

[movit] / ycbcr_input.cpp

diff --git a/ycbcr_input.cpp b/ycbcr_input.cpp
index 925bf2a11b2a89032b0d6f20f56110ceced0aa8f..e424fca6c474108b986a5515a58aa97890ffab88 100644 (file)
--- 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();
@@ -151,31 +167,12 @@ 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, type);
-
        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) {
-               bool cb_cr_offsets_equal =
+               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];
@@ -190,6 +187,19 @@ string YCbCrInput::output_fragment_shader()
        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) {