Add Controller::LoadAudioDevice and cleanup audio device OnExit

src/app/core/controller.cc

@@ -121,6 +121,7 @@ absl::Status Controller::OnEntry() {
   RETURN_IF_ERROR(CreateSDL_Window())
   RETURN_IF_ERROR(CreateRenderer())
   RETURN_IF_ERROR(CreateGuiContext())
+  RETURN_IF_ERROR(LoadAudioDevice())
   InitializeKeymap();
   master_editor_.SetupScreen(renderer_);
   active_ = true;
@@ -187,6 +188,8 @@ void Controller::DoRender() const {
 void Controller::OnExit() {
   master_editor_.Shutdown();
   Mix_CloseAudio();
+  SDL_PauseAudioDevice(audio_device_, 1);
+  SDL_CloseAudioDevice(audio_device_);
   ImGui_ImplSDLRenderer2_Shutdown();
   ImGui_ImplSDL2_Shutdown();
   ImGui::DestroyContext();
@@ -325,6 +328,23 @@ absl::Status Controller::LoadFontFamilies() const {
   return absl::OkStatus();
 }
 
+absl::Status Controller::LoadAudioDevice() {
+  SDL_AudioSpec want, have;
+  SDL_memset(&want, 0, sizeof(want));
+  want.freq = audio_frequency_;
+  want.format = AUDIO_S16;
+  want.channels = 2;
+  want.samples = 2048;
+  want.callback = NULL;  // Uses the queue
+  audio_device_ = SDL_OpenAudioDevice(NULL, 0, &want, &have, 0);
+  if (audio_device_ == 0) {
+    return absl::InternalError(
+        absl::StrFormat("Failed to open audio: %s\n", SDL_GetError()));
+  }
+  SDL_PauseAudioDevice(audio_device_, 0);
+  return absl::OkStatus();
+}
+
 }  // namespace core
 }  // namespace app
 }  // namespace yaze

src/app/core/controller.h

@@ -57,12 +57,14 @@ class Controller : public ExperimentFlags {
   absl::Status CreateRenderer();
   absl::Status CreateGuiContext();
   absl::Status LoadFontFamilies() const;
+  absl::Status LoadAudioDevice();
   void CloseWindow() { active_ = false; }
 
   friend int ::main(int argc, char **argv);
 
   bool active_;
   int wanted_samples_;
+  int audio_frequency_ = 48000;
   int16_t *audio_buffer_;
   editor::MasterEditor master_editor_;
   SDL_AudioDeviceID audio_device_;