First commit

src/resource/audio.cpp

@@ -0,0 +1,147 @@
+#include "audio.h"
+
+#include <SDL3/SDL_properties.h>
+
+#include <iostream>
+
+namespace game::resource
+{
+  MIX_Mixer* Audio::mixer_get()
+  {
+    static auto mixer = MIX_CreateMixerDevice(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, nullptr);
+    return mixer;
+  }
+
+  void Audio::retain()
+  {
+    if (refCount) ++(*refCount);
+  }
+
+  void Audio::release()
+  {
+    if (refCount)
+    {
+      if (--(*refCount) == 0)
+      {
+        if (internal) MIX_DestroyAudio(internal);
+        delete refCount;
+      }
+      refCount = nullptr;
+    }
+    internal = nullptr;
+  }
+
+  Audio::Audio(const std::filesystem::path& path)
+  {
+    internal = MIX_LoadAudio(mixer_get(), path.c_str(), true);
+    if (internal)
+    {
+      refCount = new int(1);
+      std::cout << "Initialized audio: '" << path.string() << "'\n";
+    }
+    else
+    {
+      std::cout << "Failed to initialize audio: '" << path.string() << "'\n";
+    }
+  }
+
+  Audio::Audio(const Audio& other)
+  {
+    internal = other.internal;
+    refCount = other.refCount;
+    retain();
+    track = nullptr;
+  }
+
+  Audio::Audio(Audio&& other) noexcept
+  {
+    internal = other.internal;
+    track = other.track;
+    refCount = other.refCount;
+
+    other.internal = nullptr;
+    other.track = nullptr;
+    other.refCount = nullptr;
+  }
+
+  Audio& Audio::operator=(const Audio& other)
+  {
+    if (this != &other)
+    {
+      unload();
+      internal = other.internal;
+      refCount = other.refCount;
+      retain();
+    }
+    return *this;
+  }
+
+  Audio& Audio::operator=(Audio&& other) noexcept
+  {
+    if (this != &other)
+    {
+      unload();
+      internal = other.internal;
+      track = other.track;
+      refCount = other.refCount;
+
+      other.internal = nullptr;
+      other.track = nullptr;
+      other.refCount = nullptr;
+    }
+    return *this;
+  }
+
+  void Audio::unload()
+  {
+    if (track)
+    {
+      MIX_DestroyTrack(track);
+      track = nullptr;
+    }
+    release();
+  }
+
+  void Audio::play(bool isLoop)
+  {
+    if (!internal) return;
+
+    auto mixer = mixer_get();
+
+    if (track && MIX_GetTrackMixer(track) != mixer)
+    {
+      MIX_DestroyTrack(track);
+      track = nullptr;
+    }
+
+    if (!track)
+    {
+      track = MIX_CreateTrack(mixer);
+      if (!track) return;
+    }
+
+    MIX_SetTrackAudio(track, internal);
+
+    SDL_PropertiesID options = 0;
+
+    if (isLoop)
+    {
+      options = SDL_CreateProperties();
+      if (options) SDL_SetNumberProperty(options, MIX_PROP_PLAY_LOOPS_NUMBER, -1);
+    }
+
+    MIX_PlayTrack(track, options);
+
+    if (options) SDL_DestroyProperties(options);
+  }
+
+  void Audio::stop()
+  {
+    if (track) MIX_StopTrack(track, 0);
+  }
+
+  bool Audio::is_playing() const { return track && MIX_TrackPlaying(track); }
+
+  Audio::~Audio() { unload(); }
+  bool Audio::is_valid() const { return internal != nullptr; }
+}