ref: a3171b107ae4caa4ad0aa8df6213d9d0144328ca
dir: /vpx_util/vpx_timestamp.h/
/* * Copyright (c) 2019 The WebM 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 VPX_VPX_UTIL_VPX_TIMESTAMP_H_ #define VPX_VPX_UTIL_VPX_TIMESTAMP_H_ #include <assert.h> #ifdef __cplusplus extern "C" { #endif // __cplusplus // Rational Number with an int64 numerator typedef struct vpx_rational64 { int64_t num; // fraction numerator int den; // fraction denominator } vpx_rational64_t; // alias for struct vpx_rational64_t static INLINE int gcd(int64_t a, int b) { int r; // remainder assert(a >= 0); assert(b > 0); while (b != 0) { r = (int)(a % b); a = b; b = r; } return (int)a; } static INLINE void reduce_ratio(vpx_rational64_t *ratio) { const int denom = gcd(ratio->num, ratio->den); ratio->num /= denom; ratio->den /= denom; } #ifdef __cplusplus } // extern "C" #endif // __cplusplus #endif // VPX_VPX_UTIL_VPX_TIMESTAMP_H_