audio system basic interface

src/audio/NoAudio.h

@@ -0,0 +1,44 @@
+#ifndef AUDIO_NOAUDIO_H_
+#define AUDIO_NOAUDIO_H_
+
+#include "audio.h"
+
+namespace audio {
+    class NoSound : public Sound {
+        std::shared_ptr<PCM> pcm;
+        duration_t duration;
+    public:
+        NoSound(std::shared_ptr<PCM> pcm, bool keepPCM);
+        ~NoSound() {}
+
+        duration_t getDuration() const override {
+            return duration;
+        }
+
+        std::shared_ptr<PCM> getPCM() const override {
+            return pcm;
+        }
+
+        speakerid_t newInstance(int priority) const override {
+            return 0;
+        }
+    };
+
+    class NoAudio : public Backend {
+    public:
+        ~NoAudio() {}
+
+        Sound* createSound(std::shared_ptr<PCM> pcm, bool keepPCM) override;
+
+        void setListener(
+            glm::vec3 position,
+            glm::vec3 velocity,
+            glm::vec3 at,
+            glm::vec3 up
+        ) override {}
+
+        static NoAudio* create();
+    };
+}
+
+#endif // AUDIO_NOAUDIO_H_