Update common_audio

Corresponds to upstream commit 524e9b043e7e86fd72353b987c9d5f6a1ebf83e1

Update notes:

 * Moved src/ to webrtc/ to easily diff against the third_party/webrtc
   in the chromium tree

 * ARM/NEON/MIPS support is not yet hooked up

 * Tests have not been copied

webrtc/common_audio/signal_processing/include/spl_inl.h

@@ -0,0 +1,173 @@
+/*
+ *  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_V7
+#include "webrtc/common_audio/signal_processing/include/spl_inl_armv7.h"
+#else
+
+#if defined(MIPS32_LE)
+#include "webrtc/common_audio/signal_processing/include/spl_inl_mips.h"
+#endif
+
+#if !defined(MIPS_DSP_R1_LE)
+static __inline int16_t WebRtcSpl_SatW32ToW16(int32_t value32) {
+  int16_t out16 = (int16_t) value32;
+
+  if (value32 > 32767)
+    out16 = 32767;
+  else if (value32 < -32768)
+    out16 = -32768;
+
+  return out16;
+}
+
+static __inline int32_t WebRtcSpl_AddSatW32(int32_t l_var1, int32_t l_var2) {
+  int32_t l_sum;
+
+  // Perform long addition
+  l_sum = l_var1 + l_var2;
+
+  if (l_var1 < 0) {  // Check for underflow.
+    if ((l_var2 < 0) && (l_sum >= 0)) {
+        l_sum = (int32_t)0x80000000;
+    }
+  } else {  // Check for overflow.
+    if ((l_var2 > 0) && (l_sum < 0)) {
+        l_sum = (int32_t)0x7FFFFFFF;
+    }
+  }
+
+  return l_sum;
+}
+
+static __inline int32_t WebRtcSpl_SubSatW32(int32_t l_var1, int32_t l_var2) {
+  int32_t l_diff;
+
+  // Perform subtraction.
+  l_diff = l_var1 - l_var2;
+
+  if (l_var1 < 0) {  // Check for underflow.
+    if ((l_var2 > 0) && (l_diff > 0)) {
+      l_diff = (int32_t)0x80000000;
+    }
+  } else {  // Check for overflow.
+    if ((l_var2 < 0) && (l_diff < 0)) {
+      l_diff = (int32_t)0x7FFFFFFF;
+    }
+  }
+
+  return l_diff;
+}
+
+static __inline int16_t WebRtcSpl_AddSatW16(int16_t a, int16_t b) {
+  return WebRtcSpl_SatW32ToW16((int32_t) a + (int32_t) b);
+}
+
+static __inline int16_t WebRtcSpl_SubSatW16(int16_t var1, int16_t var2) {
+  return WebRtcSpl_SatW32ToW16((int32_t) var1 - (int32_t) var2);
+}
+#endif  // #if !defined(MIPS_DSP_R1_LE)
+
+#if !defined(MIPS32_LE)
+static __inline int16_t WebRtcSpl_GetSizeInBits(uint32_t n) {
+  int16_t 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 int16_t WebRtcSpl_NormW32(int32_t a) {
+  int16_t zeros;
+
+  if (a == 0) {
+    return 0;
+  }
+  else if (a < 0) {
+    a = ~a;
+  }
+
+  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 int16_t WebRtcSpl_NormU32(uint32_t a) {
+  int16_t 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 int16_t WebRtcSpl_NormW16(int16_t a) {
+  int16_t zeros;
+
+  if (a == 0) {
+    return 0;
+  }
+  else if (a < 0) {
+    a = ~a;
+  }
+
+  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  // #if !defined(MIPS32_LE)
+
+#endif  // WEBRTC_ARCH_ARM_V7
+
+#endif  // WEBRTC_SPL_SPL_INL_H_