1 files changed, 56 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/smooth_out_data.c b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/smooth_out_data.c
new file mode 100644
index 0000000000..9f952bfb93
--- /dev/null
+++ b/third_party/libwebrtc/modules/audio_coding/codecs/ilbc/smooth_out_data.c
@@ -0,0 +1,56 @@
+/*
+ *  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.
+ */
+
+/******************************************************************
+
+ iLBC Speech Coder ANSI-C Source Code
+
+ WebRtcIlbcfix_Smooth_odata.c
+
+******************************************************************/
+
+#include "modules/audio_coding/codecs/ilbc/smooth_out_data.h"
+
+#include "modules/audio_coding/codecs/ilbc/constants.h"
+#include "modules/audio_coding/codecs/ilbc/defines.h"
+#include "rtc_base/sanitizer.h"
+
+// An s32 + s32 -> s32 addition that's allowed to overflow. (It's still
+// undefined behavior, so not a good idea; this just makes UBSan ignore the
+// violation, so that our old code can continue to do what it's always been
+// doing.)
+static inline int32_t RTC_NO_SANITIZE("signed-integer-overflow")
+    OverflowingAdd_S32_S32_To_S32(int32_t a, int32_t b) {
+  return a + b;
+}
+
+int32_t WebRtcIlbcfix_Smooth_odata(
+    int16_t *odata,
+    int16_t *psseq,
+    int16_t *surround,
+    int16_t C)
+{
+  int i;
+
+  int16_t err;
+  int32_t errs;
+
+  for(i=0;i<80;i++) {
+    odata[i]= (int16_t)((C * surround[i] + 1024) >> 11);
+  }
+
+  errs=0;
+  for(i=0;i<80;i++) {
+    err = (psseq[i] - odata[i]) >> 3;
+    errs = OverflowingAdd_S32_S32_To_S32(errs, err * err);  // errs in Q-6
+  }
+
+  return errs;
+}