pcm/Interleave: convert PcmInterleave32() to template

src/pcm/Interleave.cxx

@@ -36,10 +36,11 @@ GenericPcmInterleave(uint8_t *gcc_restrict dest,
 	}
 }
 
-void
-PcmInterleave32(int32_t *gcc_restrict dest,
-		const ConstBuffer<const int32_t *> src,
-		size_t n_frames)
+template<typename T>
+static void
+PcmInterleaveT(T *gcc_restrict dest,
+	       const ConstBuffer<const T *> src,
+	       size_t n_frames)
 {
 	for (const auto *s : src) {
 		auto *d = dest++;
@@ -51,6 +52,14 @@ PcmInterleave32(int32_t *gcc_restrict dest,
 }
 
 void
+PcmInterleave32(int32_t *gcc_restrict dest,
+		const ConstBuffer<const int32_t *> src,
+		size_t n_frames)
+{
+	PcmInterleaveT(dest, src, n_frames);
+}
+
+void
 PcmInterleave(void *gcc_restrict dest,
 	      ConstBuffer<const void *> src,
 	      size_t n_frames, size_t sample_size)