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diff --git a/third_party/libwebrtc/audio/conversion.h b/third_party/libwebrtc/audio/conversion.h
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+/*
+ * Copyright (c) 2015 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.
+ */
+
+#ifndef AUDIO_CONVERSION_H_
+#define AUDIO_CONVERSION_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+namespace webrtc {
+
+// Convert fixed point number with 8 bit fractional part, to floating point.
+inline float Q8ToFloat(uint32_t v) {
+ return static_cast<float>(v) / (1 << 8);
+}
+
+// Convert fixed point number with 14 bit fractional part, to floating point.
+inline float Q14ToFloat(uint32_t v) {
+ return static_cast<float>(v) / (1 << 14);
+}
+} // namespace webrtc
+
+#endif // AUDIO_CONVERSION_H_