From 3444a46f4b058f5c0066320914c56bd1b417d06f Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 11 Aug 2012 03:28:57 +0000
Subject: Make sum, product, and difference plugins vectorizable. Improve const
 correctness.

git-svn-id: http://svn.drobilla.net/lad/trunk/plugins/blop.lv2@4652 a436a847-0d15-0410-975c-d299462d15a1
---
 src/include/lp4pole_filter.h |  2 +-
 src/include/vector_op.h      | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 src/include/vector_op.h

(limited to 'src/include')

diff --git a/src/include/lp4pole_filter.h b/src/include/lp4pole_filter.h
index a6b27f1..310fbbe 100644
--- a/src/include/lp4pole_filter.h
+++ b/src/include/lp4pole_filter.h
@@ -110,7 +110,7 @@ static inline float
 lp4pole_run(LP4PoleFilter* lpf,
             float          in)
 {
-	float abs_in = fabsf(16.0f * in); /* ~24dB unclipped headroom */
+	const float abs_in = fabsf(16.0f * in); /* ~24dB unclipped headroom */
 
 	lpf->max_abs_in = f_max(lpf->max_abs_in, abs_in);
 
diff --git a/src/include/vector_op.h b/src/include/vector_op.h
new file mode 100644
index 0000000..f8ea8dd
--- /dev/null
+++ b/src/include/vector_op.h
@@ -0,0 +1,44 @@
+/*
+  Apply a C arithmetical operator to two sample buffers.
+  Copyright 2012 David Robillard
+
+  This is free software: you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This software is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this software.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef BLOP_VECTOR_OP_H
+#define BLOP_VECTOR_OP_H
+
+#define VECTOR_OP(op, output, input1, input1_is_cv, input2, input2_is_cv) \
+	switch ((input1_is_cv << 1) + input2_is_cv) { \
+	case 0: /* 00 (control * control) */ \
+		output[0] = input1[0] * input2[0]; \
+		break; \
+	case 1: /* 01 (control * cv) */ \
+		for (uint32_t s = 0; s < sample_count; ++s) { \
+			output[s] = input1[0] * input2[s]; \
+		} \
+		break; \
+	case 2: /* 10 (cv * control) */ \
+		for (uint32_t s = 0; s < sample_count; ++s) { \
+			output[s] = input1[s] * input2[0]; \
+		} \
+		break; \
+	case 3: /* 11 (cv * cv) */ \
+		for (uint32_t s = 0; s < sample_count; ++s) { \
+			output[s] = input1[s] * input2[s]; \
+		} \
+		break; \
+	}
+
+#endif /* BLOP_VECTOR_OP_H */
-- 
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