1 files changed, 159 insertions, 0 deletions
diff --git a/src/common_audio/signal_processing/include/spl_inl.h b/src/common_audio/signal_processing/include/spl_inl.h
new file mode 100644
index 0000000000..23b32099a3
--- /dev/null
+++ b/src/common_audio/signal_processing/include/spl_inl.h
@@ -0,0 +1,159 @@
+/*
+ *  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 header file includes the inline functions in
+// the fix point signal processing library.
+
+#ifndef WEBRTC_SPL_SPL_INL_H_
+#define WEBRTC_SPL_SPL_INL_H_
+
+#ifdef WEBRTC_ARCH_ARM_V7A
+#include "spl_inl_armv7.h"
+#else
+
+static __inline WebRtc_Word16 WebRtcSpl_SatW32ToW16(WebRtc_Word32 value32) {
+  WebRtc_Word16 out16 = (WebRtc_Word16) value32;
+
+  if (value32 > 32767)
+    out16 = 32767;
+  else if (value32 < -32768)
+    out16 = -32768;
+
+  return out16;
+}
+
+static __inline WebRtc_Word16 WebRtcSpl_AddSatW16(WebRtc_Word16 a,
+                                                  WebRtc_Word16 b) {
+  return WebRtcSpl_SatW32ToW16((WebRtc_Word32) a + (WebRtc_Word32) b);
+}
+
+static __inline WebRtc_Word32 WebRtcSpl_AddSatW32(WebRtc_Word32 l_var1,
+                                                  WebRtc_Word32 l_var2) {
+  WebRtc_Word32 l_sum;
+
+  // perform long addition
+  l_sum = l_var1 + l_var2;
+
+  // check for under or overflow
+  if (WEBRTC_SPL_IS_NEG(l_var1)) {
+    if (WEBRTC_SPL_IS_NEG(l_var2) && !WEBRTC_SPL_IS_NEG(l_sum)) {
+        l_sum = (WebRtc_Word32)0x80000000;
+    }
+  } else {
+    if (!WEBRTC_SPL_IS_NEG(l_var2) && WEBRTC_SPL_IS_NEG(l_sum)) {
+        l_sum = (WebRtc_Word32)0x7FFFFFFF;
+    }
+  }
+
+  return l_sum;
+}
+
+static __inline WebRtc_Word16 WebRtcSpl_SubSatW16(WebRtc_Word16 var1,
+                                                  WebRtc_Word16 var2) {
+  return WebRtcSpl_SatW32ToW16((WebRtc_Word32) var1 - (WebRtc_Word32) var2);
+}
+
+static __inline WebRtc_Word32 WebRtcSpl_SubSatW32(WebRtc_Word32 l_var1,
+                                                  WebRtc_Word32 l_var2) {
+  WebRtc_Word32 l_diff;
+
+  // perform subtraction
+  l_diff = l_var1 - l_var2;
+
+  // check for underflow
+  if ((l_var1 < 0) && (l_var2 > 0) && (l_diff > 0))
+    l_diff = (WebRtc_Word32)0x80000000;
+  // check for overflow
+  if ((l_var1 > 0) && (l_var2 < 0) && (l_diff < 0))
+    l_diff = (WebRtc_Word32)0x7FFFFFFF;
+
+  return l_diff;
+}
+
+static __inline WebRtc_Word16 WebRtcSpl_GetSizeInBits(WebRtc_UWord32 n) {
+  int bits;
+
+  if (0xFFFF0000 & n) {
+    bits = 16;
+  } else {
+    bits = 0;
+  }
+  if (0x0000FF00 & (n >> bits)) bits += 8;
+  if (0x000000F0 & (n >> bits)) bits += 4;
+  if (0x0000000C & (n >> bits)) bits += 2;
+  if (0x00000002 & (n >> bits)) bits += 1;
+  if (0x00000001 & (n >> bits)) bits += 1;
+
+  return bits;
+}
+
+static __inline int WebRtcSpl_NormW32(WebRtc_Word32 a) {
+  int zeros;
+
+  if (a <= 0) a ^= 0xFFFFFFFF;
+
+  if (!(0xFFFF8000 & a)) {
+    zeros = 16;
+  } else {
+    zeros = 0;
+  }
+  if (!(0xFF800000 & (a << zeros))) zeros += 8;
+  if (!(0xF8000000 & (a << zeros))) zeros += 4;
+  if (!(0xE0000000 & (a << zeros))) zeros += 2;
+  if (!(0xC0000000 & (a << zeros))) zeros += 1;
+
+  return zeros;
+}
+
+static __inline int WebRtcSpl_NormU32(WebRtc_UWord32 a) {
+  int zeros;
+
+  if (a == 0) return 0;
+
+  if (!(0xFFFF0000 & a)) {
+    zeros = 16;
+  } else {
+    zeros = 0;
+  }
+  if (!(0xFF000000 & (a << zeros))) zeros += 8;
+  if (!(0xF0000000 & (a << zeros))) zeros += 4;
+  if (!(0xC0000000 & (a << zeros))) zeros += 2;
+  if (!(0x80000000 & (a << zeros))) zeros += 1;
+
+  return zeros;
+}
+
+static __inline int WebRtcSpl_NormW16(WebRtc_Word16 a) {
+  int zeros;
+
+  if (a <= 0) a ^= 0xFFFF;
+
+  if (!(0xFF80 & a)) {
+    zeros = 8;
+  } else {
+    zeros = 0;
+  }
+  if (!(0xF800 & (a << zeros))) zeros += 4;
+  if (!(0xE000 & (a << zeros))) zeros += 2;
+  if (!(0xC000 & (a << zeros))) zeros += 1;
+
+  return zeros;
+}
+
+static __inline int32_t WebRtc_MulAccumW16(int16_t a,
+                                          int16_t b,
+                                          int32_t c) {
+  return (a * b + c);
+}
+
+#endif  // WEBRTC_ARCH_ARM_V7A
+
+#endif  // WEBRTC_SPL_SPL_INL_H_