graph_renderer.h

// SPDX-FileCopyrightText: © 2025 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include "dsp/graph_node.h"
#include "utils/units.h"
 
#include <QPromise>
 
#include <juce_wrapper.h>
 
namespace zrythm::dsp
{
class GraphRenderer
{
public:
  using SampleRange = std::pair<units::sample_t, units::sample_t>;
  using RunOnMainThread = std::function<void (std::function<void ()>)>;
 
  struct RenderOptions
  {
    units::sample_rate_t sample_rate_;
    units::sample_t      block_length_;
    unsigned int         num_threads_ =
      std::max (5u, std::thread::hardware_concurrency ()) - 4;
  };

  static QFuture<juce::AudioSampleBuffer> render_async (
    RenderOptions                options,
    graph::GraphNodeCollection &&nodes,
    RunOnMainThread              run_on_main_thread,
    SampleRange                  range,
    const dsp::TempoMap         &tempo_map);
 
private:
  static void render (
    QPromise<juce::AudioSampleBuffer> &promise,
    RenderOptions                      options,
    graph::GraphNodeCollection       &&nodes,
    RunOnMainThread                    run_on_main_thread,
    SampleRange                        range,
    const dsp::TempoMap               &tempo_map);
};
}