ebiten/audio/internal/oboe/oboe_common_AudioClock_android.h

76 lines
2.4 KiB
C++
Vendored

/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef OBOE_AUDIO_CLOCK_H
#define OBOE_AUDIO_CLOCK_H
#include <sys/types.h>
#include <ctime>
#include "oboe_oboe_Definitions_android.h"
namespace oboe {
// TODO: Move this class into the public headers because it is useful when calculating stream latency
class AudioClock {
public:
static int64_t getNanoseconds(clockid_t clockId = CLOCK_MONOTONIC) {
struct timespec time;
int result = clock_gettime(clockId, &time);
if (result < 0) {
return result;
}
return (time.tv_sec * kNanosPerSecond) + time.tv_nsec;
}
/**
* Sleep until the specified time.
*
* @param nanoTime time to wake up
* @param clockId CLOCK_MONOTONIC is default
* @return 0 or a negative error, eg. -EINTR
*/
static int sleepUntilNanoTime(int64_t nanoTime, clockid_t clockId = CLOCK_MONOTONIC) {
struct timespec time;
time.tv_sec = nanoTime / kNanosPerSecond;
time.tv_nsec = nanoTime - (time.tv_sec * kNanosPerSecond);
return 0 - clock_nanosleep(clockId, TIMER_ABSTIME, &time, NULL);
}
/**
* Sleep for the specified number of nanoseconds in real-time.
* Return immediately with 0 if a negative nanoseconds is specified.
*
* @param nanoseconds time to sleep
* @param clockId CLOCK_REALTIME is default
* @return 0 or a negative error, eg. -EINTR
*/
static int sleepForNanos(int64_t nanoseconds, clockid_t clockId = CLOCK_REALTIME) {
if (nanoseconds > 0) {
struct timespec time;
time.tv_sec = nanoseconds / kNanosPerSecond;
time.tv_nsec = nanoseconds - (time.tv_sec * kNanosPerSecond);
return 0 - clock_nanosleep(clockId, 0, &time, NULL);
}
return 0;
}
};
} // namespace oboe
#endif //OBOE_AUDIO_CLOCK_H