OpenShot Audio Library | OpenShotAudio: juce_CoreAudioTimeConversions_mac.h Source File

OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_CoreAudioTimeConversions_mac.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23
24// This file will be included directly by macOS/iOS-specific .cpps
25#pragma once
26
27#if ! DOXYGEN
28
29#include <mach/mach_time.h>
30
31namespace juce
32{
33
34struct CoreAudioTimeConversions
35{
36public:
37 CoreAudioTimeConversions()
38 {
39 mach_timebase_info_data_t info{};
40 mach_timebase_info (&info);
41 numerator = info.numer;
42 denominator = info.denom;
43 }
44
45 uint64_t hostTimeToNanos (uint64_t hostTime) const
46 {
47 return multiplyByRatio (hostTime, numerator, denominator);
48 }
49
50 uint64_t nanosToHostTime (uint64_t nanos) const
51 {
52 return multiplyByRatio (nanos, denominator, numerator);
53 }
54
55private:
56 // Adapted from CAHostTimeBase.h in the Core Audio Utility Classes
57 static uint64_t multiplyByRatio (uint64_t toMultiply, uint64_t numerator, uint64_t denominator)
58 {
59 #if defined (__SIZEOF_INT128__)
60 unsigned __int128
61 #else
62 long double
63 #endif
64 result = toMultiply;
65
66 if (numerator != denominator)
67 {
68 result *= numerator;
69 result /= denominator;
70 }
71
72 return (uint64_t) result;
73 }
74
75 uint64_t numerator = 0, denominator = 0;
76};
77
78} // namespace juce
79
80#endif