bool ended = false;
};
+class TexturePool {
+public:
+ GLuint get_texture(GLenum format, GLuint width, GLuint height);
+ void release_texture(GLuint tex_num);
+
+private:
+ struct Texture {
+ GLuint tex_num;
+ GLenum format;
+ GLuint width, height;
+ bool in_use = false;
+ };
+ vector<Texture> textures;
+};
+
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);
+
+ void release_texture(GLuint tex) {
+ pool.release_texture(tex);
+ }
private:
int width, height;
GLuint initial_flow_tex;
+ TexturePool pool;
// The various passes.
Sobel sobel;
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 = get_texture(GL_RG16F, level_width, level_height);
+ GLuint grad0_tex = pool.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 = get_texture(GL_RGB16F, width_patches, height_patches);
+ GLuint flow_out_tex = pool.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);
+ pool.release_texture(grad0_tex);
// Densification.
// Set up an output texture (initially zero).
- GLuint dense_flow_tex = get_texture(GL_RGB16F, level_width, level_height);
+ GLuint dense_flow_tex = pool.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);
+ pool.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 = 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);
+ GLuint I_tex = pool.get_texture(GL_R16F, level_width, level_height);
+ GLuint I_t_tex = pool.get_texture(GL_R16F, level_width, level_height);
+ GLuint base_flow_tex = pool.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);
+ pool.release_texture(dense_flow_tex);
glDeleteTextures(1, &tex0_view);
glDeleteTextures(1, &tex1_view);
// 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 = get_texture(GL_RG16F, level_width, level_height);
- GLuint beta_0_tex = get_texture(GL_R16F, level_width, level_height);
+ GLuint I_x_y_tex = pool.get_texture(GL_RG16F, level_width, level_height);
+ GLuint beta_0_tex = pool.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);
+ pool.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 = get_texture(GL_RG16F, level_width, level_height);
+ GLuint du_dv_tex = pool.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 = get_texture(GL_R16F, level_width, level_height);
- GLuint smoothness_y_tex = get_texture(GL_R16F, level_width, level_height);
+ GLuint smoothness_x_tex = pool.get_texture(GL_R16F, level_width, level_height);
+ GLuint smoothness_y_tex = pool.get_texture(GL_R16F, level_width, level_height);
// And finally for the equation set. See SetupEquations for
// the storage format.
- GLuint equation_tex = get_texture(GL_RGBA32UI, level_width, level_height);
+ GLuint equation_tex = pool.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);
+ pool.release_texture(I_t_tex);
+ pool.release_texture(I_x_y_tex);
+ pool.release_texture(beta_0_tex);
+ pool.release_texture(smoothness_x_tex);
+ pool.release_texture(smoothness_y_tex);
+ pool.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.
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);
+ pool.release_texture(du_dv_tex);
if (prev_level_flow_tex != initial_flow_tex) {
- release_texture(prev_level_flow_tex);
+ pool.release_texture(prev_level_flow_tex);
}
prev_level_flow_tex = base_flow_tex;
prev_level_width = level_width;
if (finest_level == 0) {
return prev_level_flow_tex;
} else {
- GLuint final_tex = get_texture(GL_RG16F, width, height);
+ GLuint final_tex = pool.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);
+ pool.release_texture(prev_level_flow_tex);
return final_tex;
}
}
-GLuint DISComputeFlow::get_texture(GLenum format, GLuint width, GLuint height)
+GLuint TexturePool::get_texture(GLenum format, GLuint width, GLuint height)
{
for (Texture &tex : textures) {
if (!tex.in_use && tex.format == format &&
return tex.tex_num;
}
-void DISComputeFlow::release_texture(GLuint tex_num)
+void TexturePool::release_texture(GLuint tex_num)
{
for (Texture &tex : textures) {
if (tex.tex_num == tex_num) {
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