46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/*
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* Copyright (c) 2019 The WebM 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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#ifndef VPX_VPX_UTIL_VPX_TIMESTAMP_H_
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#define VPX_VPX_UTIL_VPX_TIMESTAMP_H_
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#ifdef __cplusplus
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extern "C" {
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#endif // __cplusplus
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// Rational Number with an int64 numerator
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typedef struct vpx_rational64 {
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int64_t num; // fraction numerator
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int den; // fraction denominator
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} vpx_rational64_t; // alias for struct vpx_rational64_t
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static INLINE int gcd(int64_t a, int b) {
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int r; // remainder
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while (b > 0) {
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r = (int)(a % b);
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a = b;
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b = r;
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}
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return (int)a;
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}
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static INLINE void reduce_ratio(vpx_rational64_t *ratio) {
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const int denom = gcd(ratio->num, ratio->den);
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ratio->num /= denom;
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ratio->den /= denom;
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif // __cplusplus
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#endif // VPX_VPX_UTIL_VPX_TIMESTAMP_H_
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