From f47eba7d7d4c6a1d9501e027b63bbab04bb7d417 Mon Sep 17 00:00:00 2001
From: Takamichi Horikawa <takamichiho@gmail.com>
Date: Thu, 30 Mar 2017 23:31:39 +0000
Subject: add NEON optimization

---
 libopna/opnassg-sinc-c.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 libopna/opnassg-sinc-c.c

(limited to 'libopna/opnassg-sinc-c.c')

diff --git a/libopna/opnassg-sinc-c.c b/libopna/opnassg-sinc-c.c
new file mode 100644
index 0000000..bf93039
--- /dev/null
+++ b/libopna/opnassg-sinc-c.c
@@ -0,0 +1,13 @@
+#include "libopna/opnassg.h"
+
+void opna_ssg_sinc_calc_c(unsigned resampler_index, const int16_t *inbuf, int32_t *outbuf) {
+  for (int c = 0; c < 3; c++) {
+    int32_t chsample = 0;
+    for (int j = 0; j < OPNA_SSG_SINCTABLELEN; j++) {
+      unsigned sincindex = j;
+      if (!(resampler_index&1)) sincindex += OPNA_SSG_SINCTABLELEN;
+      chsample += inbuf[(((resampler_index)>>1)+j)*3+c] * opna_ssg_sinctable[sincindex];
+    }
+    outbuf[c] = chsample;
+  }
+}
-- 
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