#include "chroma_subsampler.h"
+#include "v210_converter.h"
#include <vector>
ChromaSubsampler::ChromaSubsampler(ResourcePool *resource_pool)
: resource_pool(resource_pool)
{
+ vector<string> frag_shader_outputs;
+
// Set up stuff for NV12 conversion.
//
// Note: Due to the horizontally co-sited chroma/luma samples in H.264
"#version 130 \n"
"in vec2 tc0, tc1; \n"
"uniform sampler2D cbcr_tex; \n"
- "out vec4 FragColor; \n"
+ "out vec4 FragColor, FragColor2; \n"
"void main() { \n"
" FragColor = 0.5 * (texture(cbcr_tex, tc0) + texture(cbcr_tex, tc1)); \n"
+ " FragColor2 = FragColor; \n"
"} \n";
- vector<string> frag_shader_outputs;
cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader, frag_shader_outputs);
check_error();
-
- float vertices[] = {
- 0.0f, 2.0f,
- 0.0f, 0.0f,
- 2.0f, 0.0f
- };
- cbcr_vbo = generate_vbo(2, GL_FLOAT, sizeof(vertices), vertices);
+ cbcr_chroma_offset_0_location = get_uniform_location(cbcr_program_num, "foo", "chroma_offset_0");
+ check_error();
+ cbcr_chroma_offset_1_location = get_uniform_location(cbcr_program_num, "foo", "chroma_offset_1");
check_error();
+
cbcr_texture_sampler_uniform = glGetUniformLocation(cbcr_program_num, "cbcr_tex");
check_error();
cbcr_position_attribute_index = glGetAttribLocation(cbcr_program_num, "position");
check_error();
cbcr_texcoord_attribute_index = glGetAttribLocation(cbcr_program_num, "texcoord");
check_error();
+
+ // Same, for UYVY conversion.
+ string uyvy_vert_shader =
+ "#version 130 \n"
+ " \n"
+ "in vec2 position; \n"
+ "in vec2 texcoord; \n"
+ "out vec2 y_tc0, y_tc1, cbcr_tc0, cbcr_tc1; \n"
+ "uniform vec2 foo_luma_offset_0; \n"
+ "uniform vec2 foo_luma_offset_1; \n"
+ "uniform vec2 foo_chroma_offset_0; \n"
+ "uniform vec2 foo_chroma_offset_1; \n"
+ " \n"
+ "void main() \n"
+ "{ \n"
+ " // The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is: \n"
+ " // \n"
+ " // 2.000 0.000 0.000 -1.000 \n"
+ " // 0.000 2.000 0.000 -1.000 \n"
+ " // 0.000 0.000 -2.000 -1.000 \n"
+ " // 0.000 0.000 0.000 1.000 \n"
+ " gl_Position = vec4(2.0 * position.x - 1.0, 2.0 * position.y - 1.0, -1.0, 1.0); \n"
+ " vec2 flipped_tc = texcoord; \n"
+ " y_tc0 = flipped_tc + foo_luma_offset_0; \n"
+ " y_tc1 = flipped_tc + foo_luma_offset_1; \n"
+ " cbcr_tc0 = flipped_tc + foo_chroma_offset_0; \n"
+ " cbcr_tc1 = flipped_tc + foo_chroma_offset_1; \n"
+ "} \n";
+ string uyvy_frag_shader =
+ "#version 130 \n"
+ "in vec2 y_tc0, y_tc1, cbcr_tc0, cbcr_tc1; \n"
+ "uniform sampler2D y_tex, cbcr_tex; \n"
+ "out vec4 FragColor; \n"
+ "void main() { \n"
+ " float y0 = texture(y_tex, y_tc0).r; \n"
+ " float y1 = texture(y_tex, y_tc1).r; \n"
+ " vec2 cbcr0 = texture(cbcr_tex, cbcr_tc0).rg; \n"
+ " vec2 cbcr1 = texture(cbcr_tex, cbcr_tc1).rg; \n"
+ " vec2 cbcr = 0.5 * (cbcr0 + cbcr1); \n"
+ " FragColor = vec4(cbcr.g, y0, cbcr.r, y1); \n"
+ "} \n";
+
+ uyvy_program_num = resource_pool->compile_glsl_program(uyvy_vert_shader, uyvy_frag_shader, frag_shader_outputs);
+ check_error();
+ uyvy_luma_offset_0_location = get_uniform_location(uyvy_program_num, "foo", "luma_offset_0");
+ check_error();
+ uyvy_luma_offset_1_location = get_uniform_location(uyvy_program_num, "foo", "luma_offset_1");
+ check_error();
+ uyvy_chroma_offset_0_location = get_uniform_location(uyvy_program_num, "foo", "chroma_offset_0");
+ check_error();
+ uyvy_chroma_offset_1_location = get_uniform_location(uyvy_program_num, "foo", "chroma_offset_1");
+ check_error();
+
+ uyvy_y_texture_sampler_uniform = glGetUniformLocation(uyvy_program_num, "y_tex");
+ check_error();
+ uyvy_cbcr_texture_sampler_uniform = glGetUniformLocation(uyvy_program_num, "cbcr_tex");
+ check_error();
+ uyvy_position_attribute_index = glGetAttribLocation(uyvy_program_num, "position");
+ check_error();
+ uyvy_texcoord_attribute_index = glGetAttribLocation(uyvy_program_num, "texcoord");
+ check_error();
+
+ // Shared between the two.
+ float vertices[] = {
+ 0.0f, 2.0f,
+ 0.0f, 0.0f,
+ 2.0f, 0.0f
+ };
+ vbo = generate_vbo(2, GL_FLOAT, sizeof(vertices), vertices);
+ check_error();
+
+ // v210 compute shader.
+ if (v210Converter::has_hardware_support()) {
+ string v210_shader_src = R"(#version 150
+#extension GL_ARB_compute_shader : enable
+#extension GL_ARB_shader_image_load_store : enable
+layout(local_size_x=2, local_size_y=16) in;
+layout(r16) uniform restrict readonly image2D in_y;
+uniform sampler2D in_cbcr; // Of type RG16.
+layout(rgb10_a2) uniform restrict writeonly image2D outbuf;
+uniform float inv_width, inv_height;
+
+void main()
+{
+ int xb = int(gl_GlobalInvocationID.x); // X block number.
+ int y = int(gl_GlobalInvocationID.y); // Y (actual line).
+ float yf = (gl_GlobalInvocationID.y + 0.5f) * inv_height; // Y float coordinate.
+
+ // Load and scale CbCr values, sampling in-between the texels to get
+ // to (left/4 + center/2 + right/4).
+ vec2 pix_cbcr[3];
+ for (int i = 0; i < 3; ++i) {
+ vec2 a = texture(in_cbcr, vec2((xb * 6 + i * 2) * inv_width, yf)).xy;
+ vec2 b = texture(in_cbcr, vec2((xb * 6 + i * 2 + 1) * inv_width, yf)).xy;
+ pix_cbcr[i] = (a + b) * (0.5 * 65535.0 / 1023.0);
+ }
+
+ // Load and scale the Y values. Note that we use integer coordinates here,
+ // so we don't need to offset by 0.5.
+ float pix_y[6];
+ for (int i = 0; i < 6; ++i) {
+ pix_y[i] = imageLoad(in_y, ivec2(xb * 6 + i, y)).x * (65535.0 / 1023.0);
+ }
+
+ imageStore(outbuf, ivec2(xb * 4 + 0, y), vec4(pix_cbcr[0].x, pix_y[0], pix_cbcr[0].y, 1.0));
+ imageStore(outbuf, ivec2(xb * 4 + 1, y), vec4(pix_y[1], pix_cbcr[1].x, pix_y[2], 1.0));
+ imageStore(outbuf, ivec2(xb * 4 + 2, y), vec4(pix_cbcr[1].y, pix_y[3], pix_cbcr[2].x, 1.0));
+ imageStore(outbuf, ivec2(xb * 4 + 3, y), vec4(pix_y[4], pix_cbcr[2].y, pix_y[5], 1.0));
+}
+)";
+ GLuint shader_num = movit::compile_shader(v210_shader_src, GL_COMPUTE_SHADER);
+ check_error();
+ v210_program_num = glCreateProgram();
+ check_error();
+ glAttachShader(v210_program_num, shader_num);
+ check_error();
+ glLinkProgram(v210_program_num);
+ check_error();
+
+ GLint success;
+ glGetProgramiv(v210_program_num, GL_LINK_STATUS, &success);
+ check_error();
+ if (success == GL_FALSE) {
+ GLchar error_log[1024] = {0};
+ glGetProgramInfoLog(v210_program_num, 1024, nullptr, error_log);
+ fprintf(stderr, "Error linking program: %s\n", error_log);
+ exit(1);
+ }
+
+ v210_in_y_pos = glGetUniformLocation(v210_program_num, "in_y");
+ check_error();
+ v210_in_cbcr_pos = glGetUniformLocation(v210_program_num, "in_cbcr");
+ check_error();
+ v210_outbuf_pos = glGetUniformLocation(v210_program_num, "outbuf");
+ check_error();
+ v210_inv_width_pos = glGetUniformLocation(v210_program_num, "inv_width");
+ check_error();
+ v210_inv_height_pos = glGetUniformLocation(v210_program_num, "inv_height");
+ check_error();
+ } else {
+ v210_program_num = 0;
+ }
}
ChromaSubsampler::~ChromaSubsampler()
{
resource_pool->release_glsl_program(cbcr_program_num);
check_error();
- glDeleteBuffers(1, &cbcr_vbo);
+ resource_pool->release_glsl_program(uyvy_program_num);
+ check_error();
+ glDeleteBuffers(1, &vbo);
check_error();
+ if (v210_program_num != 0) {
+ glDeleteProgram(v210_program_num);
+ check_error();
+ }
}
-void ChromaSubsampler::subsample_chroma(GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex)
+void ChromaSubsampler::subsample_chroma(GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex, GLuint dst2_tex)
{
- GLuint vao;
- glGenVertexArrays(1, &vao);
- check_error();
-
+ GLuint vao = resource_pool->create_vec2_vao({ cbcr_position_attribute_index, cbcr_texcoord_attribute_index }, vbo);
glBindVertexArray(vao);
check_error();
// Extract Cb/Cr.
- GLuint fbo = resource_pool->create_fbo(dst_tex);
+ GLuint fbo;
+ if (dst2_tex <= 0) {
+ fbo = resource_pool->create_fbo(dst_tex);
+ } else {
+ fbo = resource_pool->create_fbo(dst_tex, dst2_tex);
+ }
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glViewport(0, 0, width/2, height/2);
check_error();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
check_error();
- float chroma_offset_0[] = { -1.0f / width, 0.0f };
- float chroma_offset_1[] = { -0.0f / width, 0.0f };
- set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
- set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_1", chroma_offset_1);
-
+ glUniform2f(cbcr_chroma_offset_0_location, -1.0f / width, 0.0f);
+ check_error();
+ glUniform2f(cbcr_chroma_offset_1_location, -0.0f / width, 0.0f);
+ check_error();
glUniform1i(cbcr_texture_sampler_uniform, 0);
- glBindBuffer(GL_ARRAY_BUFFER, cbcr_vbo);
+ glDrawArrays(GL_TRIANGLES, 0, 3);
check_error();
- for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) {
- glEnableVertexAttribArray(attr_index);
- check_error();
- glVertexAttribPointer(attr_index, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
- check_error();
- }
+ glUseProgram(0);
+ check_error();
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ check_error();
+ glBindVertexArray(0);
+ check_error();
- glDrawArrays(GL_TRIANGLES, 0, 3);
+ resource_pool->release_fbo(fbo);
+ resource_pool->release_vec2_vao(vao);
+}
+
+void ChromaSubsampler::create_uyvy(GLuint y_tex, GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex)
+{
+ GLuint vao = resource_pool->create_vec2_vao({ cbcr_position_attribute_index, cbcr_texcoord_attribute_index }, vbo);
+ glBindVertexArray(vao);
check_error();
- for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) {
- glDisableVertexAttribArray(attr_index);
- check_error();
- }
+ glBindVertexArray(vao);
+ check_error();
+
+ GLuint fbo = resource_pool->create_fbo(dst_tex);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+ glViewport(0, 0, width/2, height);
+ check_error();
+
+ glUseProgram(uyvy_program_num);
+ check_error();
+
+ glUniform1i(uyvy_y_texture_sampler_uniform, 0);
+ check_error();
+ glUniform1i(uyvy_cbcr_texture_sampler_uniform, 1);
+ check_error();
+
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, y_tex);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ 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();
+
+ glActiveTexture(GL_TEXTURE1);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, cbcr_tex);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ 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();
+
+ glUniform2f(uyvy_luma_offset_0_location, -0.5f / width, 0.0f);
+ check_error();
+ glUniform2f(uyvy_luma_offset_1_location, 0.5f / width, 0.0f);
+ check_error();
+ glUniform2f(uyvy_chroma_offset_0_location, -1.0f / width, 0.0f);
+ check_error();
+ glUniform2f(uyvy_chroma_offset_1_location, -0.0f / width, 0.0f);
+ check_error();
+
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ check_error();
+ glDrawArrays(GL_TRIANGLES, 0, 3);
+ check_error();
+
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
glUseProgram(0);
check_error();
glBindFramebuffer(GL_FRAMEBUFFER, 0);
check_error();
+ glBindVertexArray(0);
+ check_error();
resource_pool->release_fbo(fbo);
- glDeleteVertexArrays(1, &vao);
+ resource_pool->release_vec2_vao(vao);
+}
+
+void ChromaSubsampler::create_v210(GLuint y_tex, GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex)
+{
+ assert(v210_program_num != 0);
+
+ glUseProgram(v210_program_num);
+ check_error();
+
+ glUniform1i(v210_in_y_pos, 0);
+ check_error();
+ glUniform1i(v210_in_cbcr_pos, 1);
+ check_error();
+ glUniform1i(v210_outbuf_pos, 2);
+ check_error();
+ glUniform1f(v210_inv_width_pos, 1.0 / width);
+ check_error();
+ glUniform1f(v210_inv_height_pos, 1.0 / height);
+ check_error();
+
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, y_tex); // We don't actually need to bind it, but we need to set the state.
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ 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();
+ glBindImageTexture(0, y_tex, 0, GL_FALSE, 0, GL_READ_ONLY, GL_R16); // This is the real bind.
+ check_error();
+
+ glActiveTexture(GL_TEXTURE1);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, cbcr_tex);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ 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();
+
+ glBindImageTexture(2, dst_tex, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGB10_A2);
+ check_error();
+
+ // Actually run the shader. We use workgroups of size 2x16 threadst , and each thread
+ // processes 6x1 input pixels, so round up to number of 12x16 pixel blocks.
+ glDispatchCompute((width + 11) / 12, (height + 15) / 16, 1);
+
+ glBindTexture(GL_TEXTURE_2D, 0);
+ check_error();
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glUseProgram(0);
check_error();
}
projects / nageru / blobdiff