1 files changed, 91 insertions, 0 deletions
diff --git a/src/common_audio/signal_processing/dot_product_with_scale.c b/src/common_audio/signal_processing/dot_product_with_scale.c
new file mode 100644
index 0000000000..6e085fdb60
--- /dev/null
+++ b/src/common_audio/signal_processing/dot_product_with_scale.c
@@ -0,0 +1,91 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+/*
+ * This file contains the function WebRtcSpl_DotProductWithScale().
+ * The description header can be found in signal_processing_library.h
+ *
+ */
+
+#include "signal_processing_library.h"
+
+WebRtc_Word32 WebRtcSpl_DotProductWithScale(WebRtc_Word16 *vector1, WebRtc_Word16 *vector2,
+                                            int length, int scaling)
+{
+    WebRtc_Word32 sum;
+    int i;
+#ifdef _ARM_OPT_
+#pragma message("NOTE: _ARM_OPT_ optimizations are used")
+    WebRtc_Word16 len4 = (length >> 2) << 2;
+#endif
+
+    sum = 0;
+
+#ifndef _ARM_OPT_
+    for (i = 0; i < length; i++)
+    {
+        sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1++, *vector2++, scaling);
+    }
+#else
+    if (scaling == 0)
+    {
+        for (i = 0; i < len4; i = i + 4)
+        {
+            sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
+            vector1++;
+            vector2++;
+        }
+
+        for (i = len4; i < length; i++)
+        {
+            sum += WEBRTC_SPL_MUL_16_16(*vector1, *vector2);
+            vector1++;
+            vector2++;
+        }
+    }
+    else
+    {
+        for (i = 0; i < len4; i = i + 4)
+        {
+            sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
+            vector1++;
+            vector2++;
+            sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
+            vector1++;
+            vector2++;
+        }
+
+        for (i = len4; i < length; i++)
+        {
+            sum += WEBRTC_SPL_MUL_16_16_RSFT(*vector1, *vector2, scaling);
+            vector1++;
+            vector2++;
+        }
+    }
+#endif
+
+    return sum;
+}