node_composite_stabilize2d.cc

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/* SPDX-FileCopyrightText: 2011 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#include "BLI_assert.h"
#include "BLI_math_angle_types.hh"
#include "BLI_math_matrix.hh"
#include "BLI_math_matrix_types.hh"
#include "BLI_math_vector_types.hh"
 
#include "UI_interface.hh"
#include "UI_resources.hh"
 
#include "DNA_movieclip_types.h"
#include "DNA_node_types.h"
 
#include "BKE_context.hh"
#include "BKE_lib_id.hh"
#include "BKE_movieclip.h"
#include "BKE_tracking.h"
 
#include "COM_node_operation.hh"
 
#include "node_composite_util.hh"
 
/* **************** Stabilize 2D ******************** */
 
namespace blender::nodes::node_composite_stabilize2d_cc {
 
static void cmp_node_stabilize2d_declare(NodeDeclarationBuilder &b)
{
  b.add_input<decl::Color>("Image")
      .default_value({0.8f, 0.8f, 0.8f, 1.0f})
      .compositor_realization_mode(CompositorInputRealizationMode::None);
  b.add_input<decl::Bool>("Invert")
      .default_value(false)
      .description("Invert stabilization to reintroduce motion to the image")
      .compositor_expects_single_value();
 
  b.add_output<decl::Color>("Image");
}
 
static void init(const bContext *C, PointerRNA *ptr)
{
  bNode *node = (bNode *)ptr->data;
  Scene *scene = CTX_data_scene(C);
 
  node->id = (ID *)scene->clip;
  id_us_plus(node->id);
 
  /* Default to bi-linear, see node_sampler_type_items in `rna_nodetree.cc`. */
  node->custom1 = 1;
}
 
static void node_composit_buts_stabilize2d(uiLayout *layout, bContext *C, PointerRNA *ptr)
{
  bNode *node = (bNode *)ptr->data;
 
  uiTemplateID(layout, C, ptr, "clip", nullptr, "CLIP_OT_open", nullptr);
 
  if (!node->id) {
    return;
  }
 
  layout->prop(ptr, "filter_type", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
}
 
using namespace blender::compositor;
 
class Stabilize2DOperation : public NodeOperation {
 public:
  using NodeOperation::NodeOperation;
 
  void execute() override
  {
    const Result &input = this->get_input("Image");
    Result &output = this->get_result("Image");
 
    MovieClip *movie_clip = get_movie_clip();
    if (input.is_single_value() || !movie_clip) {
      output.share_data(input);
      return;
    }
 
    const int width = input.domain().size.x;
    const int height = input.domain().size.y;
    const int frame_number = BKE_movieclip_remap_scene_to_clip_frame(movie_clip,
                                                                     context().get_frame_number());
 
    float2 translation;
    float scale, rotation;
    BKE_tracking_stabilization_data_get(
        movie_clip, frame_number, width, height, translation, &scale, &rotation);
 
    float3x3 transformation = math::from_loc_rot_scale<float3x3>(
        translation, math::AngleRadian(rotation), float2(scale));
    if (do_inverse_stabilization()) {
      transformation = math::invert(transformation);
    }
 
    output.share_data(input);
    output.transform(transformation);
    output.get_realization_options().interpolation = this->get_interpolation();
  }
 
  Interpolation get_interpolation()
  {
    switch (static_cast<CMPNodeInterpolation>(bnode().custom1)) {
      case CMP_NODE_INTERPOLATION_NEAREST:
        return Interpolation::Nearest;
      case CMP_NODE_INTERPOLATION_BILINEAR:
        return Interpolation::Bilinear;
      case CMP_NODE_INTERPOLATION_BICUBIC:
        return Interpolation::Bicubic;
    }
 
    BLI_assert_unreachable();
    return Interpolation::Nearest;
  }
 
  bool do_inverse_stabilization()
  {
    return this->get_input("Invert").get_single_value_default(false);
  }
 
  MovieClip *get_movie_clip()
  {
    return reinterpret_cast<MovieClip *>(bnode().id);
  }
};
 
static NodeOperation *get_compositor_operation(Context &context, DNode node)
{
  return new Stabilize2DOperation(context, node);
}
 
}  // namespace blender::nodes::node_composite_stabilize2d_cc
 
static void register_node_type_cmp_stabilize2d()
{
  namespace file_ns = blender::nodes::node_composite_stabilize2d_cc;
 
  static blender::bke::bNodeType ntype;
 
  cmp_node_type_base(&ntype, "CompositorNodeStabilize", CMP_NODE_STABILIZE2D);
  ntype.ui_name = "Stabilize 2D";
  ntype.ui_description = "Stabilize footage using 2D stabilization motion tracking settings";
  ntype.enum_name_legacy = "STABILIZE2D";
  ntype.nclass = NODE_CLASS_DISTORT;
  ntype.declare = file_ns::cmp_node_stabilize2d_declare;
  ntype.draw_buttons = file_ns::node_composit_buts_stabilize2d;
  ntype.initfunc_api = file_ns::init;
  ntype.get_compositor_operation = file_ns::get_compositor_operation;
 
  blender::bke::node_register_type(ntype);
}
NOD_REGISTER_NODE(register_node_type_cmp_stabilize2d)