From 4a62cd4ad89405f34a15bc4eb914d8ff97f9a7ae Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Mon, 23 Dec 2013 10:03:05 +0100
Subject: pcm/Volume: move code to template pcm_volume_sample()

---
 src/pcm/Volume.cxx | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

(limited to 'src/pcm/Volume.cxx')

diff --git a/src/pcm/Volume.cxx b/src/pcm/Volume.cxx
index eaba84a59..8a2ec13b6 100644
--- a/src/pcm/Volume.cxx
+++ b/src/pcm/Volume.cxx
@@ -26,6 +26,20 @@
 #include <stdint.h>
 #include <string.h>
 
+template<SampleFormat F, class Traits=SampleTraits<F>>
+static inline typename Traits::value_type
+pcm_volume_sample(typename Traits::value_type _sample,
+		  int volume)
+{
+	typename Traits::long_type sample(_sample);
+
+	sample = (sample * volume + pcm_volume_dither() +
+		  PCM_VOLUME_1S / 2)
+		>> PCM_VOLUME_BITS;
+
+	return PcmClamp<F, Traits>(sample);
+}
+
 template<SampleFormat F, class Traits=SampleTraits<F>>
 static void
 pcm_volume_change(typename Traits::pointer_type buffer,
@@ -33,13 +47,8 @@ pcm_volume_change(typename Traits::pointer_type buffer,
 		  int volume)
 {
 	while (buffer < end) {
-		typename Traits::long_type sample = *buffer;
-
-		sample = (sample * volume + pcm_volume_dither() +
-			  PCM_VOLUME_1S / 2)
-			>> PCM_VOLUME_BITS;
-
-		*buffer++ = PcmClamp<F, Traits>(sample);
+		const auto sample = *buffer;
+		*buffer++ = pcm_volume_sample<F, Traits>(sample, volume);
 	}
 }
 
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