class DISComputeFlow {
public:
DISComputeFlow(int width, int height);
+
+ // Returns a texture that must be released with release_texture()
+ // after use.
GLuint exec(GLuint tex0, GLuint tex1);
+ void release_texture(GLuint tex);
private:
int width, height;
SOR sor;
AddBaseFlow add_base_flow;
ResizeFlow resize_flow;
+
+ struct Texture {
+ GLuint tex_num;
+ GLenum format;
+ GLuint width, height;
+ bool in_use = false;
+ };
+ vector<Texture> textures;
+
+ GLuint get_texture(GLenum format, GLuint width, GLuint height);
};
DISComputeFlow::DISComputeFlow(int width, int height)
GLuint DISComputeFlow::exec(GLuint tex0, GLuint tex1)
{
+ for (const Texture &tex : textures) {
+ assert(!tex.in_use);
+ }
+
int prev_level_width = 1, prev_level_height = 1;
GLuint prev_level_flow_tex = initial_flow_tex;
// Create a new texture; we could be fancy and render use a multi-level
// texture, but meh.
- GLuint grad0_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &grad0_tex);
- glTextureStorage2D(grad0_tex, 1, GL_RG16F, level_width, level_height);
+ GLuint grad0_tex = get_texture(GL_RG16F, level_width, level_height);
// Find the derivative.
{
// level (sampled bilinearly; no fancy tricks) as a guide, then search from there.
// Create an output flow texture.
- GLuint flow_out_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &flow_out_tex);
- glTextureStorage2D(flow_out_tex, 1, GL_RGB16F, width_patches, height_patches);
+ GLuint flow_out_tex = get_texture(GL_RGB16F, width_patches, height_patches);
// And draw.
{
ScopedTimer timer("Motion search", &level_timer);
motion_search.exec(tex0_view, tex1_view, grad0_tex, prev_level_flow_tex, flow_out_tex, level_width, level_height, prev_level_width, prev_level_height, width_patches, height_patches);
}
+ release_texture(grad0_tex);
// Densification.
// Set up an output texture (initially zero).
- GLuint dense_flow_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &dense_flow_tex);
- glTextureStorage2D(dense_flow_tex, 1, GL_RGB16F, level_width, level_height);
+ GLuint dense_flow_tex = get_texture(GL_RGB16F, level_width, level_height);
glClearTexImage(dense_flow_tex, 0, GL_RGB, GL_FLOAT, nullptr);
// And draw.
ScopedTimer timer("Densification", &level_timer);
densify.exec(tex0_view, tex1_view, flow_out_tex, dense_flow_tex, level_width, level_height, width_patches, height_patches);
}
+ release_texture(flow_out_tex);
// Everything below here in the loop belongs to variational refinement.
ScopedTimer varref_timer("Variational refinement", &level_timer);
// in pixels, not 0..1 normalized OpenGL texture coordinates.
// This is because variational refinement depends so heavily on derivatives,
// which are measured in intensity levels per pixel.
- GLuint I_tex, I_t_tex, base_flow_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &I_tex);
- glCreateTextures(GL_TEXTURE_2D, 1, &I_t_tex);
- glCreateTextures(GL_TEXTURE_2D, 1, &base_flow_tex);
- glTextureStorage2D(I_tex, 1, GL_R16F, level_width, level_height);
- glTextureStorage2D(I_t_tex, 1, GL_R16F, level_width, level_height);
- glTextureStorage2D(base_flow_tex, 1, GL_RG16F, level_width, level_height);
+ GLuint I_tex = get_texture(GL_R16F, level_width, level_height);
+ GLuint I_t_tex = get_texture(GL_R16F, level_width, level_height);
+ GLuint base_flow_tex = get_texture(GL_RG16F, level_width, level_height);
{
ScopedTimer timer("Prewarping", &varref_timer);
prewarp.exec(tex0_view, tex1_view, dense_flow_tex, I_tex, I_t_tex, base_flow_tex, level_width, level_height);
}
+ release_texture(dense_flow_tex);
// Calculate I_x and I_y. We're only calculating first derivatives;
// the others will be taken on-the-fly in order to sample from fewer
// textures overall, since sampling from the L1 cache is cheap.
// (TODO: Verify that this is indeed faster than making separate
// double-derivative textures.)
- GLuint I_x_y_tex, beta_0_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &I_x_y_tex);
- glCreateTextures(GL_TEXTURE_2D, 1, &beta_0_tex);
- glTextureStorage2D(I_x_y_tex, 1, GL_RG16F, level_width, level_height);
- glTextureStorage2D(beta_0_tex, 1, GL_R16F, level_width, level_height);
+ GLuint I_x_y_tex = get_texture(GL_RG16F, level_width, level_height);
+ GLuint beta_0_tex = get_texture(GL_R16F, level_width, level_height);
{
ScopedTimer timer("First derivatives", &varref_timer);
derivatives.exec(I_tex, I_x_y_tex, beta_0_tex, level_width, level_height);
}
+ release_texture(I_tex);
// We need somewhere to store du and dv (the flow increment, relative
// to the non-refined base flow u0 and v0). It starts at zero.
- GLuint du_dv_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &du_dv_tex);
- glTextureStorage2D(du_dv_tex, 1, GL_RG16F, level_width, level_height);
+ GLuint du_dv_tex = get_texture(GL_RG16F, level_width, level_height);
glClearTexImage(du_dv_tex, 0, GL_RG, GL_FLOAT, nullptr);
// And for smoothness.
- GLuint smoothness_x_tex, smoothness_y_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &smoothness_x_tex);
- glCreateTextures(GL_TEXTURE_2D, 1, &smoothness_y_tex);
- glTextureStorage2D(smoothness_x_tex, 1, GL_R16F, level_width, level_height);
- glTextureStorage2D(smoothness_y_tex, 1, GL_R16F, level_width, level_height);
+ GLuint smoothness_x_tex = get_texture(GL_R16F, level_width, level_height);
+ GLuint smoothness_y_tex = get_texture(GL_R16F, level_width, level_height);
// And finally for the equation set. See SetupEquations for
// the storage format.
- GLuint equation_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &equation_tex);
- glTextureStorage2D(equation_tex, 1, GL_RGBA32UI, level_width, level_height);
+ GLuint equation_tex = get_texture(GL_RGBA32UI, level_width, level_height);
for (int outer_idx = 0; outer_idx < level + 1; ++outer_idx) {
// Calculate the smoothness terms between the neighboring pixels,
}
}
+ release_texture(I_t_tex);
+ release_texture(I_x_y_tex);
+ release_texture(beta_0_tex);
+ release_texture(smoothness_x_tex);
+ release_texture(smoothness_y_tex);
+ release_texture(equation_tex);
+
// Add the differential flow found by the variational refinement to the base flow,
// giving the final flow estimate for this level.
// The output is in diff_flow_tex; we don't need to make a new texture.
ScopedTimer timer("Add differential flow", &varref_timer);
add_base_flow.exec(base_flow_tex, du_dv_tex, level_width, level_height);
}
+ release_texture(du_dv_tex);
+ if (prev_level_flow_tex != initial_flow_tex) {
+ release_texture(prev_level_flow_tex);
+ }
prev_level_flow_tex = base_flow_tex;
prev_level_width = level_width;
prev_level_height = level_height;
if (finest_level == 0) {
return prev_level_flow_tex;
} else {
- GLuint final_tex;
- glCreateTextures(GL_TEXTURE_2D, 1, &final_tex);
- glTextureStorage2D(final_tex, 1, GL_RG16F, width, height);
+ GLuint final_tex = get_texture(GL_RG16F, width, height);
resize_flow.exec(prev_level_flow_tex, final_tex, prev_level_width, prev_level_height, width, height);
+ release_texture(prev_level_flow_tex);
return final_tex;
}
}
+GLuint DISComputeFlow::get_texture(GLenum format, GLuint width, GLuint height)
+{
+ for (Texture &tex : textures) {
+ if (!tex.in_use && tex.format == format &&
+ tex.width == width && tex.height == height) {
+ tex.in_use = true;
+ return tex.tex_num;
+ }
+ }
+
+ Texture tex;
+ glCreateTextures(GL_TEXTURE_2D, 1, &tex.tex_num);
+ glTextureStorage2D(tex.tex_num, 1, format, width, height);
+ tex.format = format;
+ tex.width = width;
+ tex.height = height;
+ tex.in_use = true;
+ textures.push_back(tex);
+ return tex.tex_num;
+}
+
+void DISComputeFlow::release_texture(GLuint tex_num)
+{
+ for (Texture &tex : textures) {
+ if (tex.tex_num == tex_num) {
+ assert(tex.in_use);
+ tex.in_use = false;
+ return;
+ }
+ }
+ assert(false);
+}
+
int main(int argc, char **argv)
{
static const option long_options[] = {
unique_ptr<float[]> dense_flow(new float[width1 * height1 * 2]);
glGetTextureImage(final_tex, 0, GL_RG, GL_FLOAT, width1 * height1 * 2 * sizeof(float), dense_flow.get());
+ compute_flow.release_texture(final_tex);
+
FILE *fp = fopen("flow.ppm", "wb");
FILE *flowfp = fopen("flow.flo", "wb");
fprintf(fp, "P6\n%d %d\n255\n", width1, height1);
projects / nageru / commitdiff