X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=ycbcr_422interleaved_input.cpp;fp=ycbcr_422interleaved_input.cpp;h=b6342893b73ffd89e9d1e50aeb423d76c8e32c4a;hp=0000000000000000000000000000000000000000;hb=ba60914d4e5eda7b28af700bf43e9699b7aa720d;hpb=5155a601695e522bb0ce23c9b67bfda37ebf918a

diff --git a/ycbcr_422interleaved_input.cpp b/ycbcr_422interleaved_input.cpp
new file mode 100644
index 0000000..b634289
--- /dev/null
+++ b/ycbcr_422interleaved_input.cpp
@@ -0,0 +1,149 @@
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "effect_util.h"
+#include "resource_pool.h"
+#include "util.h"
+#include "ycbcr.h"
+#include "ycbcr_422interleaved_input.h"
+
+using namespace Eigen;
+using namespace std;
+
+namespace movit {
+
+YCbCr422InterleavedInput::YCbCr422InterleavedInput(const ImageFormat &image_format,
+                                                   const YCbCrFormat &ycbcr_format,
+						   unsigned width, unsigned height)
+	: image_format(image_format),
+	  ycbcr_format(ycbcr_format),
+	  width(width),
+	  height(height),
+	  resource_pool(NULL)
+{
+	pbo = 0;
+	texture_num[0] = texture_num[1] = 0;
+
+	assert(ycbcr_format.chroma_subsampling_x == 2);
+	assert(ycbcr_format.chroma_subsampling_y == 1);
+	assert(width % ycbcr_format.chroma_subsampling_x == 0);
+
+	widths[CHANNEL_LUMA] = width;
+	widths[CHANNEL_CHROMA] = width / ycbcr_format.chroma_subsampling_x;
+	pitches[CHANNEL_LUMA] = width;
+	pitches[CHANNEL_CHROMA] = width / ycbcr_format.chroma_subsampling_x;
+
+	pixel_data = NULL;
+}
+
+YCbCr422InterleavedInput::~YCbCr422InterleavedInput()
+{
+	for (unsigned channel = 0; channel < 2; ++channel) {
+		if (texture_num[channel] != 0) {
+			resource_pool->release_2d_texture(texture_num[channel]);
+		}
+	}
+}
+
+void YCbCr422InterleavedInput::set_gl_state(GLuint glsl_program_num, const string& prefix, unsigned *sampler_num)
+{
+	for (unsigned channel = 0; channel < 2; ++channel) {
+		glActiveTexture(GL_TEXTURE0 + *sampler_num + channel);
+		check_error();
+
+		if (texture_num[channel] == 0) {
+			// (Re-)upload the texture.
+			GLuint format, internal_format;
+			if (channel == CHANNEL_LUMA) {
+				format = GL_RG;
+				internal_format = GL_RG8;
+			} else {	
+				assert(channel == CHANNEL_CHROMA);
+				format = GL_RGBA;
+				internal_format = GL_RGBA8;
+			}
+
+			texture_num[channel] = resource_pool->create_2d_texture(internal_format, widths[channel], height);
+			glBindTexture(GL_TEXTURE_2D, texture_num[channel]);
+			check_error();
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+			check_error();
+			glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
+			check_error();
+			glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+			check_error();
+			glPixelStorei(GL_UNPACK_ROW_LENGTH, pitches[channel]);
+			check_error();
+			glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, widths[channel], height, format, GL_UNSIGNED_BYTE, pixel_data);
+			check_error();
+			glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+			check_error();
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+			check_error();
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+			check_error();
+		} else {
+			glBindTexture(GL_TEXTURE_2D, texture_num[channel]);
+			check_error();
+		}
+	}
+
+	glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
+	check_error();
+
+	// Bind samplers.
+	set_uniform_int(glsl_program_num, prefix, "tex_y", *sampler_num + 0);
+	set_uniform_int(glsl_program_num, prefix, "tex_cbcr", *sampler_num + 1);
+
+	*sampler_num += 2;
+}
+
+string YCbCr422InterleavedInput::output_fragment_shader()
+{
+	float offset[3];
+	Matrix3d ycbcr_to_rgb;
+	compute_ycbcr_matrix(ycbcr_format, offset, &ycbcr_to_rgb);
+
+	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[CHANNEL_CHROMA]);
+	float cr_offset_x = compute_chroma_offset(
+		ycbcr_format.cr_x_position, ycbcr_format.chroma_subsampling_x, widths[CHANNEL_CHROMA]);
+	frag_shader += output_glsl_float("PREFIX(cb_offset_x)", cb_offset_x);
+	frag_shader += output_glsl_float("PREFIX(cr_offset_x)", cr_offset_x);
+
+	char buf[256];
+	sprintf(buf, "#define CB_CR_OFFSETS_EQUAL %d\n",
+		(fabs(ycbcr_format.cb_x_position - ycbcr_format.cr_x_position) < 1e-6));
+	frag_shader += buf;
+
+	frag_shader += read_file("ycbcr_422interleaved_input.frag");
+	return frag_shader;
+}
+
+void YCbCr422InterleavedInput::invalidate_pixel_data()
+{
+	for (unsigned channel = 0; channel < 2; ++channel) {
+		if (texture_num[channel] != 0) {
+			resource_pool->release_2d_texture(texture_num[channel]);
+			texture_num[channel] = 0;
+		}
+	}
+}
+
+bool YCbCr422InterleavedInput::set_int(const std::string& key, int value)
+{
+	if (key == "needs_mipmaps") {
+		// We currently do not support this.
+		return (value == 0);
+	}
+	return Effect::set_int(key, value);
+}
+
+}  // namespace movit