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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2011 Blender Foundation. */
#include "COM_MovieDistortionOperation.h"
#include "DNA_defaults.h"
#include "BKE_movieclip.h"
namespace blender::compositor {
MovieDistortionOperation::MovieDistortionOperation(bool distortion)
{
this->add_input_socket(DataType::Color);
this->add_output_socket(DataType::Color);
this->set_canvas_input_index(0);
input_operation_ = nullptr;
movie_clip_ = nullptr;
apply_ = distortion;
}
void MovieDistortionOperation::init_data()
{
if (movie_clip_) {
MovieTracking *tracking = &movie_clip_->tracking;
MovieClipUser clip_user = *DNA_struct_default_get(MovieClipUser);
int calibration_width, calibration_height;
BKE_movieclip_user_set_frame(&clip_user, framenumber_);
BKE_movieclip_get_size(movie_clip_, &clip_user, &calibration_width, &calibration_height);
float delta[2];
rcti full_frame;
full_frame.xmin = full_frame.ymin = 0;
full_frame.xmax = this->get_width();
full_frame.ymax = this->get_height();
BKE_tracking_max_distortion_delta_across_bound(
tracking, this->get_width(), this->get_height(), &full_frame, !apply_, delta);
/* 5 is just in case we didn't hit real max of distortion in
* BKE_tracking_max_undistortion_delta_across_bound
*/
margin_[0] = delta[0] + 5;
margin_[1] = delta[1] + 5;
calibration_width_ = calibration_width;
calibration_height_ = calibration_height;
pixel_aspect_ = tracking->camera.pixel_aspect;
}
else {
margin_[0] = margin_[1] = 0;
}
}
void MovieDistortionOperation::init_execution()
{
input_operation_ = this->get_input_socket_reader(0);
if (movie_clip_) {
MovieTracking *tracking = &movie_clip_->tracking;
distortion_ = BKE_tracking_distortion_new(tracking, calibration_width_, calibration_height_);
}
else {
distortion_ = nullptr;
}
}
void MovieDistortionOperation::deinit_execution()
{
input_operation_ = nullptr;
movie_clip_ = nullptr;
if (distortion_ != nullptr) {
BKE_tracking_distortion_free(distortion_);
}
}
void MovieDistortionOperation::execute_pixel_sampled(float output[4],
float x,
float y,
PixelSampler /*sampler*/)
{
if (distortion_ != nullptr) {
/* float overscan = 0.0f; */
const float pixel_aspect = pixel_aspect_;
const float w = float(this->get_width()) /* / (1 + overscan) */;
const float h = float(this->get_height()) /* / (1 + overscan) */;
const float aspx = w / float(calibration_width_);
const float aspy = h / float(calibration_height_);
float in[2];
float out[2];
in[0] = (x /* - 0.5 * overscan * w */) / aspx;
in[1] = (y /* - 0.5 * overscan * h */) / aspy / pixel_aspect;
if (apply_) {
BKE_tracking_distortion_undistort_v2(distortion_, in, out);
}
else {
BKE_tracking_distortion_distort_v2(distortion_, in, out);
}
float u = out[0] * aspx /* + 0.5 * overscan * w */,
v = (out[1] * aspy /* + 0.5 * overscan * h */) * pixel_aspect;
input_operation_->read_sampled(output, u, v, PixelSampler::Bilinear);
}
else {
input_operation_->read_sampled(output, x, y, PixelSampler::Bilinear);
}
}
bool MovieDistortionOperation::determine_depending_area_of_interest(
rcti *input, ReadBufferOperation *read_operation, rcti *output)
{
rcti new_input;
new_input.xmin = input->xmin - margin_[0];
new_input.ymin = input->ymin - margin_[1];
new_input.xmax = input->xmax + margin_[0];
new_input.ymax = input->ymax + margin_[1];
return NodeOperation::determine_depending_area_of_interest(&new_input, read_operation, output);
}
void MovieDistortionOperation::get_area_of_interest(const int input_idx,
const rcti &output_area,
rcti &r_input_area)
{
BLI_assert(input_idx == 0);
UNUSED_VARS_NDEBUG(input_idx);
r_input_area.xmin = output_area.xmin - margin_[0];
r_input_area.ymin = output_area.ymin - margin_[1];
r_input_area.xmax = output_area.xmax + margin_[0];
r_input_area.ymax = output_area.ymax + margin_[1];
}
void MovieDistortionOperation::update_memory_buffer_partial(MemoryBuffer *output,
const rcti &area,
Span<MemoryBuffer *> inputs)
{
const MemoryBuffer *input_img = inputs[0];
if (distortion_ == nullptr) {
output->copy_from(input_img, area);
return;
}
/* `float overscan = 0.0f;` */
const float pixel_aspect = pixel_aspect_;
const float w = float(this->get_width()) /* `/ (1 + overscan)` */;
const float h = float(this->get_height()) /* `/ (1 + overscan)` */;
const float aspx = w / float(calibration_width_);
const float aspy = h / float(calibration_height_);
float xy[2];
float distorted_xy[2];
for (BuffersIterator<float> it = output->iterate_with({}, area); !it.is_end(); ++it) {
xy[0] = (it.x /* `- 0.5 * overscan * w` */) / aspx;
xy[1] = (it.y /* `- 0.5 * overscan * h` */) / aspy / pixel_aspect;
if (apply_) {
BKE_tracking_distortion_undistort_v2(distortion_, xy, distorted_xy);
}
else {
BKE_tracking_distortion_distort_v2(distortion_, xy, distorted_xy);
}
const float u = distorted_xy[0] * aspx /* `+ 0.5 * overscan * w` */;
const float v = (distorted_xy[1] * aspy /* `+ 0.5 * overscan * h` */) * pixel_aspect;
input_img->read_elem_bilinear(u, v, it.out);
}
}
} // namespace blender::compositor
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