Added background music (defined on a per-map basis)

1 files changed, 58 insertions, 0 deletions

@@ -23,6 +23,49 @@ void Mixer::stopChannel(int channel) {
   Mix_HaltChannel(channel);
 }
 
+void Mixer::playMusic(std::string_view name, int ms) {
+  Mix_Music* song = getMusicByName(name);
+  int ret;
+
+  if (ms == 0) {
+    ret = Mix_PlayMusic(song, -1);
+  } else {
+    ret = Mix_FadeInMusic(song, -1, ms);
+  }
+
+  if (ret == -1) {
+    throw mix_error();
+  }
+
+  playingTrack_ = name;
+}
+
+void Mixer::fadeoutMusic(int ms) {
+  if (Mix_FadeOutMusic(ms) == 0) {
+    throw mix_error();
+  }
+
+  playingTrack_ = "";
+}
+
+void Mixer::muteMusic() {
+  Mix_VolumeMusic(0);
+  musicMuted_ = true;
+}
+
+void Mixer::unmuteMusic() {
+  Mix_VolumeMusic(musicVolume_);
+  musicMuted_ = false;
+}
+
+void Mixer::pauseMusic() {
+  Mix_PauseMusic();
+}
+
+void Mixer::unpauseMusic() {
+  Mix_ResumeMusic();
+}
+
 Mix_Chunk* Mixer::getChunkByFilename(std::string filename) {
   if (!sounds_.count(filename)) {
     Mix_Chunk* sample = Mix_LoadWAV(filename.c_str());
@@ -35,3 +78,18 @@ Mix_Chunk* Mixer::getChunkByFilename(std::string filename) {
 
   return sounds_[filename].get();
 }
+
+Mix_Music* Mixer::getMusicByName(std::string_view name) {
+  std::string filename = "../res/music/" + std::string(name) + ".wav";
+
+  if (!music_.count(filename)) {
+    Mix_Music* song = Mix_LoadMUS(filename.c_str());
+    if (!song) {
+      throw mix_error();
+    }
+
+    music_[filename] = music_ptr(song);
+  }
+
+  return music_[filename].get();
+}