From 9647b2cb0123f0e41163ac237b469926824951db Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Tue, 14 Jan 2020 22:43:11 +0100
Subject: [PATCH] pcm/Dsd2Pcm: move code to ApplySample()

For some reason, this speeds up the library by 2%.
---
 src/pcm/Dsd2Pcm.cxx | 13 ++++++++++---
 src/pcm/Dsd2Pcm.hxx |  1 +
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/pcm/Dsd2Pcm.cxx b/src/pcm/Dsd2Pcm.cxx
index db1da9159..8bf4cc1d4 100644
--- a/src/pcm/Dsd2Pcm.cxx
+++ b/src/pcm/Dsd2Pcm.cxx
@@ -163,6 +163,14 @@ Dsd2Pcm::Reset() noexcept
 	 */
 }
 
+inline void
+Dsd2Pcm::ApplySample(size_t ffp, uint8_t src) noexcept
+{
+	fifo[ffp] = src;
+	uint8_t *p = fifo + ((ffp-CTABLES) & FIFOMASK);
+	*p = bit_reverse(*p);
+}
+
 inline float
 Dsd2Pcm::CalcOutputSample(size_t ffp) const noexcept
 {
@@ -184,10 +192,9 @@ Dsd2Pcm::Translate(size_t samples,
 	size_t ffp = fifopos;
 	while (samples-- > 0) {
 		unsigned bite1 = *src & 0xFFu;
+		src += src_stride;
 		if (lsbf) bite1 = bit_reverse(bite1);
-		fifo[ffp] = bite1; src += src_stride;
-		uint8_t *p = fifo + ((ffp-CTABLES) & FIFOMASK);
-		*p = bit_reverse(*p);
+		ApplySample(ffp, bite1);
 		*dst = CalcOutputSample(ffp);
 		dst += dst_stride;
 		ffp = (ffp + 1) & FIFOMASK;
diff --git a/src/pcm/Dsd2Pcm.hxx b/src/pcm/Dsd2Pcm.hxx
index 55d027e38..c274fdf97 100644
--- a/src/pcm/Dsd2Pcm.hxx
+++ b/src/pcm/Dsd2Pcm.hxx
@@ -76,6 +76,7 @@ public:
 		       float *dst, ptrdiff_t dst_stride) noexcept;
 
 private:
+	void ApplySample(size_t ffp, uint8_t src) noexcept;
 	float CalcOutputSample(size_t ffp) const noexcept;
 };