Add 3d sounds spatialization support for stereo sounds

Aleph-One-Marathon · Dec 21, 2024 · a80a002 · a80a002
1 parent cbd11f1
commit a80a002
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Showing 4 changed files with 39 additions and 1 deletion.
diff --git a/Source_Files/Sound/AudioPlayer.cpp b/Source_Files/Sound/AudioPlayer.cpp
@@ -140,5 +140,11 @@ bool AudioPlayer::SetUpALSourceInit() {
 	alSourcei(audio_source->source_id, AL_REFERENCE_DISTANCE, 0);
 	alSourcei(audio_source->source_id, AL_MAX_DISTANCE, 0);
 	alSourcei(audio_source->source_id, AL_DIRECT_FILTER, AL_FILTER_NULL);
+
+#ifdef AL_SOFT_source_spatialize
+	if (OpenALManager::Get()->IsExtensionSupported(OpenALManager::OptionalExtension::Spatialization))
+		alSourcei(audio_source->source_id, AL_SOURCE_SPATIALIZE_SOFT, AL_AUTO_SOFT);
+#endif
+
 	return alGetError() == AL_NO_ERROR;
 }
diff --git a/Source_Files/Sound/OpenALManager.cpp b/Source_Files/Sound/OpenALManager.cpp
@@ -43,7 +43,15 @@ bool OpenALManager::Init(const AudioParameters& parameters) {
 	}
 
 	instance = new OpenALManager(parameters);
-	return instance->OpenDevice() && instance->GenerateSources() && instance->GenerateEffects();
+	return instance->OpenDevice() && instance->LoadOptionalExtensions() && instance->GenerateSources() && instance->GenerateEffects();
+}
+
+bool OpenALManager::LoadOptionalExtensions() {
+
+	for (auto& extension : mapping_extensions_names)
+		extension_support[extension.first] = alIsExtensionPresent(extension.second.c_str());
+
+	return true;
 }
 
 void OpenALManager::ProcessAudioQueue() {

diff --git a/Source_Files/Sound/OpenALManager.h b/Source_Files/Sound/OpenALManager.h
@@ -48,6 +48,12 @@ struct AudioParameters {
 
 class OpenALManager {
 public:
+
+	enum class OptionalExtension
+	{
+		Spatialization
+	};
+
 	static OpenALManager* Get() { return instance; }
 	static bool Init(const AudioParameters& parameters);
 	static void Shutdown();
@@ -74,6 +80,7 @@ class OpenALManager {
 	bool IsPaused() const { return paused_audio; }
 	ALCint GetRenderingFormat() const { return openal_rendering_format; }
 	ALuint GetLowPassFilter(float highFrequencyGain) const;
+	bool IsExtensionSupported(OptionalExtension extension) const { return extension_support.at(extension); }
 private:
 	static OpenALManager* instance;
 	ALCdevice* p_ALCDevice = nullptr;
@@ -116,6 +123,9 @@ class OpenALManager {
 	static LPALFILTERI alFilteri;
 	static LPALFILTERF alFilterf;
 
+	std::unordered_map<OptionalExtension, bool> extension_support;
+	bool LoadOptionalExtensions();
+
 	static void MixerCallback(void* usr, uint8* stream, int len);
 	SDL_AudioSpec sdl_audio_specs_obtained;
 	AudioParameters audio_parameters;
@@ -164,6 +174,10 @@ class OpenALManager {
 		{ALC_6POINT1_SOFT, ChannelType::_6_1},
 		{ALC_7POINT1_SOFT, ChannelType::_7_1}
 	};
+
+	const std::unordered_map<OptionalExtension, std::string> mapping_extensions_names = {
+		{OptionalExtension::Spatialization, "AL_SOFT_source_spatialize"}
+	};
 };
 
 #endif
diff --git a/Source_Files/Sound/SoundPlayer.cpp b/Source_Files/Sound/SoundPlayer.cpp
@@ -231,10 +231,20 @@ bool SoundPlayer::SetUpALSourceInit() {
 		alSource3i(audio_source->source_id, AL_DIRECTION, 0, 0, 0);
 		alSourcei(audio_source->source_id, AL_REFERENCE_DISTANCE, 0);
 		alSourcei(audio_source->source_id, AL_MAX_DISTANCE, 0);
+
+#ifdef AL_SOFT_source_spatialize
+		if (OpenALManager::Get()->IsExtensionSupported(OpenALManager::OptionalExtension::Spatialization))
+			alSourcei(audio_source->source_id, AL_SOURCE_SPATIALIZE_SOFT, AL_AUTO_SOFT);
+#endif
 	}
 	else {
 		alSourcei(audio_source->source_id, AL_DISTANCE_MODEL, AL_INVERSE_DISTANCE_CLAMPED);
 		alSourcei(audio_source->source_id, AL_SOURCE_RELATIVE, AL_FALSE);
+
+#ifdef AL_SOFT_source_spatialize
+		if (OpenALManager::Get()->IsExtensionSupported(OpenALManager::OptionalExtension::Spatialization))
+			alSourcei(audio_source->source_id, AL_SOURCE_SPATIALIZE_SOFT, AL_TRUE);
+#endif
 	}
 
 	return alGetError() == AL_NO_ERROR;