feat(audio): add pitch control to audio sources

Implement set_pitch method that clamps pitch between 0.0 and 1.0 and applies it via AL_PITCH. Includes minor whitespace cleanup in audio_engine.cpp.

include/Cubed/audio/audio_source.hpp

@@ -17,7 +17,7 @@ public:
     void set_buffer_3d(const AudioBuffer& buffer, const glm::vec3& vec3);
     void set_loop(bool on = true);
     void set_volume(float volume);
-
+    void set_pitch(float pitch);
     void play();
     void play_2d(const AudioBuffer& buffer);
     void play_3d(const AudioBuffer& buffer, const glm::vec3& pos);

src/audio/audio_engine.cpp

@@ -6,6 +6,7 @@
 #include "Cubed/tools/log.hpp"
 
 #include <stdexcept>
+
 namespace Cubed {
 AudioEngine::AudioEngine() {};
 
@@ -194,12 +195,14 @@ void AudioEngine::underwater_change(bool underwater) {
     for (auto& source : m_pool->sources()) {
         if (m_underwater) {
             source.set_filter(*m_low_pass_filter);
+
         } else {
             source.clear_filter();
         }
     }
     if (underwater) {
         m_bgm->set_filter(*m_low_pass_filter);
+
     } else {
         m_bgm->clear_filter();
     }

src/audio/audio_source.cpp

@@ -74,6 +74,11 @@ void AudioSource::set_volume(float volume) {
     alSourcef(m_source, AL_GAIN, volume);
 }
 
+void AudioSource::set_pitch(float pitch) {
+    pitch = std::clamp(pitch, 0.0f, 1.0f);
+    alSourcef(m_source, AL_PITCH, pitch);
+}
+
 void AudioSource::play() { alSourcePlay(m_source); }
 
 void AudioSource::play_2d(const AudioBuffer& buffer) {