looper/playback.cpp

#include "playback.h"
extern "C" {
#include "raudio.h"
}
#include <thread>
using namespace std::chrono;
void Playback::ThreadFunc() {
    InitAudioDevice();
    Music music = LoadMusicStream(filePath.c_str());
    PlayMusicStream(music);
    length = GetMusicTimeLength(music);
    while (running) {
        if (file_changed.exchange(false)) {
            StopMusicStream(music);
            UnloadMusicStream(music);
            music = LoadMusicStream(filePath.c_str());
            PlayMusicStream(music);
            length = GetMusicTimeLength(music);
        }
        UpdateMusicStream(music);
        if (flag_mutex.try_lock()) {
            if (seeking.exchange(false)) {
                SeekMusicStream(music, position);
            }
            if (paused) {
                PauseMusicStream(music);
            } else {
                ResumeMusicStream(music);
            }
            if (update.exchange(false)) {
                SetMasterVolume(volume / 100.0);
                SetMusicPitch(music, speed);
            }
            flag_mutex.unlock();
        }
        position = GetMusicTimePlayed(music);
        std::this_thread::sleep_for(5ms);
    }
    UnloadMusicStream(music);
    CloseAudioDevice();
}

Playback::Playback() {
    running = false;
    paused = true;
    position = 0;
    length = 0;
    volume = 100.0;
    speed = 1.0;
}

Playback::~Playback() {
    Stop();
}

void Playback::Start(std::string filePath) {
    this->filePath = filePath;
    printf("Playing %s...\n", filePath.c_str());
    flag_mutex.lock();
    paused = false;
    Update();
    if (running.exchange(true)) {
        file_changed.store(true);
    } else {
        thread = std::thread(&Playback::ThreadFunc, this);
    }
    flag_mutex.unlock();
}
double Playback::GetPosition() {
    return position;
}
double Playback::GetLength() {
    return length;
}

void Playback::Seek(double position) {
    flag_mutex.lock();
    this->position = position;
    seeking.store(true);
    flag_mutex.unlock();
}

void Playback::Pause() {
    flag_mutex.lock();
    paused = !paused;
    flag_mutex.unlock();
}

bool Playback::IsPaused() {
    return paused;
}

void Playback::Stop() {
    if (running.exchange(false)) {
        thread.join();
    }
}

void Playback::Update() {
    update.store(true);
}

bool Playback::IsStopped() {
    return !running;
}