MilkDropVisualizer.cpp

MilkDropVisualizer.cpp

# MilkDropVisualizer.h:

#ifndef CADENZA_MUSIC_PLAYER_MILKDROPVISUALIZER_H
#define CADENZA_MUSIC_PLAYER_MILKDROPVISUALIZER_H

#include <vector>
#include <span>
#include "interfaces/IPostProcessor.h"
#include "utils/log.h"
#include "utils/constants.h"
#include "projectM-4/projectM.h"

namespace cadenza {

class MilkDropVisualizer : public IPostProcessor {
public:
    explicit MilkDropVisualizer(PlaybackParams params) : IPostProcessor{params} {
        projectm_handle_ = projectm_create();
        if (projectm_handle_ == NULL) {
            LOGD("projectM init failed!");
        } else {
            LOGD("projectM init success!");
        }
    }
    std::optional<std::vector<float>> operator()(std::vector<float> samples) override;
    std::unique_ptr<IPostProcessor> Clone() override;
    void RenderFrame();
    void SetWindowSize(size_t width, size_t height);
    void LoadPresetData(const char *preset_data);
    ~MilkDropVisualizer() override;
private:
    projectm_handle projectm_handle_;
};

} // cadenza

#endif //CADENZA_MUSIC_PLAYER_MILKDROPVISUALIZER_H




# MilkDropVisualizer.cpp:

#include "MilkDropVisualizer.h"

namespace cadenza {

std::optional<std::vector<float>> MilkDropVisualizer::operator()(std::vector<float> samples) {
    auto *samples_tmp = new int16_t[samples.size()];
    for (int i = 0; i < samples.size(); i++) {
        samples_tmp[i] = static_cast<int16_t>(samples[i]);
    }
    projectm_pcm_add_int16(projectm_handle_,
                           samples_tmp,
                           samples.size() / 2,
                           projectm_channels::PROJECTM_STEREO);
    LOGD("projectM: samples added!");
    return std::nullopt;
}

std::unique_ptr<IPostProcessor> MilkDropVisualizer::Clone() {
    return std::make_unique<MilkDropVisualizer>(std::move(*this));
}

void MilkDropVisualizer::SetWindowSize(size_t width, size_t height) {
    projectm_set_window_size(projectm_handle_, width, height);
}

void MilkDropVisualizer::RenderFrame() {
    projectm_opengl_render_frame(projectm_handle_);
}

void MilkDropVisualizer::LoadPresetData(const char *preset_data) {
    projectm_load_preset_data(projectm_handle_, preset_data, false);
}

MilkDropVisualizer::~MilkDropVisualizer() {
    projectm_destroy(projectm_handle_);
    projectm_handle_ = nullptr;
}

} // cadenza