audio: add Sampler::LoopSample().

src/sample.cpp

@@ -109,6 +109,13 @@ void Sample::Play()
 #endif
 }
 
+void Sample::Loop()
+{
+#if defined USE_SDL_MIXER
+    data->m_channel = Mix_PlayChannel(-1, data->m_chunk, -1);
+#endif
+}
+
 void Sample::Stop()
 {
 #if defined USE_SDL_MIXER

src/sample.h

@@ -40,6 +40,7 @@ protected:
 public:
     /* New methods */
     void Play();
+    void Loop();
     void Stop();
 
 private:

src/sampler.cpp

@@ -60,6 +60,12 @@ void Sampler::PlaySample(int id)
     sample->Play();
 }
 
+void Sampler::LoopSample(int id)
+{
+    Sample *sample = (Sample *)data->samples.GetEntity(id - 1);
+    sample->Loop();
+}
+
 void Sampler::StopSample(int id)
 {
     Sample *sample = (Sample *)data->samples.GetEntity(id - 1);

src/sampler.h

@@ -29,6 +29,7 @@ public:
     static void Deregister(int id);
 
     static void PlaySample(int id);
+    static void LoopSample(int id);
     static void StopSample(int id);
 
 private: