mirror of
https://github.com/danog/libtgvoip.git
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5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright 2014 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// Borrowed from Chromium's src/base/numerics/safe_conversions.h.
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#ifndef RTC_BASE_NUMERICS_SAFE_CONVERSIONS_H_
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#define RTC_BASE_NUMERICS_SAFE_CONVERSIONS_H_
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#include <limits>
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#include "rtc_base/checks.h"
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#include "rtc_base/numerics/safe_conversions_impl.h"
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namespace rtc {
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// Convenience function that returns true if the supplied value is in range
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// for the destination type.
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template <typename Dst, typename Src>
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inline bool IsValueInRangeForNumericType(Src value) {
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return internal::RangeCheck<Dst>(value) == internal::TYPE_VALID;
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}
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// checked_cast<> and dchecked_cast<> are analogous to static_cast<> for
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// numeric types, except that they [D]CHECK that the specified numeric
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// conversion will not overflow or underflow. NaN source will always trigger
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// the [D]CHECK.
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template <typename Dst, typename Src>
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inline Dst checked_cast(Src value) {
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RTC_CHECK(IsValueInRangeForNumericType<Dst>(value));
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return static_cast<Dst>(value);
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}
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template <typename Dst, typename Src>
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inline Dst dchecked_cast(Src value) {
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RTC_DCHECK(IsValueInRangeForNumericType<Dst>(value));
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return static_cast<Dst>(value);
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}
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// saturated_cast<> is analogous to static_cast<> for numeric types, except
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// that the specified numeric conversion will saturate rather than overflow or
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// underflow. NaN assignment to an integral will trigger a RTC_CHECK condition.
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template <typename Dst, typename Src>
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inline Dst saturated_cast(Src value) {
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// Optimization for floating point values, which already saturate.
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if (std::numeric_limits<Dst>::is_iec559)
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return static_cast<Dst>(value);
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switch (internal::RangeCheck<Dst>(value)) {
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case internal::TYPE_VALID:
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return static_cast<Dst>(value);
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case internal::TYPE_UNDERFLOW:
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return std::numeric_limits<Dst>::min();
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case internal::TYPE_OVERFLOW:
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return std::numeric_limits<Dst>::max();
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// Should fail only on attempting to assign NaN to a saturated integer.
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case internal::TYPE_INVALID:
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FATAL();
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return std::numeric_limits<Dst>::max();
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}
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FATAL();
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return static_cast<Dst>(value);
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}
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} // namespace rtc
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#endif // RTC_BASE_NUMERICS_SAFE_CONVERSIONS_H_
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