| /* |
| * Copyright 2017 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 ANDROID_AUDIO_CLOCK_H |
| #define ANDROID_AUDIO_CLOCK_H |
| |
| // This file can be included for either C or C++ source. |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <sys/time.h> |
| #include <time.h> |
| |
| // These are declared as macros for compatbility with existing uses. |
| // TODO Spell out the words in full. |
| #define MICROS_PER_SECOND 1000000LL |
| #define MILLIS_PER_SECOND 1000LL |
| #define NANOS_PER_MICROSECOND 1000LL |
| #define NANOS_PER_MILLISECOND 1000000LL |
| #define NANOS_PER_SECOND 1000000000LL |
| |
| #define SECONDS_PER_MINUTE 60LL |
| #define MINUTES_PER_HOUR 60LL |
| |
| #define MICROS_PER_MINUTE (MICROS_PER_SECOND * SECONDS_PER_MINUTE) |
| #define MILLIS_PER_MINUTE (MILLIS_PER_SECOND * SECONDS_PER_MINUTE) |
| #define NANOS_PER_MINUTE (NANOS_PER_SECOND * SECONDS_PER_MINUTE) |
| |
| #define MICROS_PER_HOUR (MICROS_PER_MINUTE * MINUTES_PER_HOUR) |
| #define MILLIS_PER_HOUR (MILLIS_PER_MINUTE * MINUTES_PER_HOUR) |
| #define NANOS_PER_HOUR (NANOS_PER_MINUTE * MINUTES_PER_HOUR) |
| |
| /** |
| * \brief Converts time in ns to a time string, with format similar to logcat. |
| * \param ns input time in nanoseconds to convert. |
| * \param buffer caller allocated string buffer, buffer_length must be >= 19 chars |
| * in order to fully fit in time. The string is always returned |
| * null terminated if buffer_size is greater than zero. |
| * \param buffer_size size of buffer. |
| */ |
| static inline void audio_utils_ns_to_string(int64_t ns, char *buffer, size_t buffer_size) |
| { |
| if (buffer_size == 0) return; |
| |
| const int one_second = 1000000000; |
| const time_t sec = ns / one_second; |
| struct tm tm; |
| |
| // Supported on bionic, glibc, and macOS, but not mingw. |
| if (localtime_r(&sec, &tm) == NULL) { |
| buffer[0] = '\0'; |
| return; |
| } |
| |
| if (snprintf(buffer, buffer_size, "%02d-%02d %02d:%02d:%02d.%03d", |
| tm.tm_mon + 1, // localtime_r uses months in 0 - 11 range |
| tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, |
| (int)(ns % one_second / 1000000)) < 0) { |
| buffer[0] = '\0'; // null terminate on format error, which should not happen |
| } |
| } |
| |
| /** |
| * An object that contains the formatted time string. |
| * |
| * The time string is 19 characters (including null termination). |
| * Example: "03-27 16:47:06.187" |
| * MM DD HH MM SS MS |
| */ |
| typedef struct audio_utils_time_string { |
| char time[19]; /* minimum size buffer */ |
| } audio_utils_time_string_t; |
| |
| /** |
| * \brief Converts time in ns to a time string object, with format similar to logcat. |
| * \param ns input time in nanoseconds to convert. |
| */ |
| static inline audio_utils_time_string_t audio_utils_time_string_from_ns(int64_t ns) |
| { |
| audio_utils_time_string_t ts; |
| |
| audio_utils_ns_to_string(ns, ts.time, sizeof(ts.time)); |
| return ts; |
| } |
| |
| /** |
| * \brief Converts a timespec to nanoseconds. |
| * \param ts input timespec to convert. |
| * \return timespec converted to nanoseconds. |
| */ |
| static inline int64_t audio_utils_ns_from_timespec(const struct timespec *ts) |
| { |
| return ts->tv_sec * 1000000000LL + ts->tv_nsec; |
| } |
| |
| /** |
| * \brief Gets the real time clock in nanoseconds. |
| * \return the real time clock in nanoseconds, or 0 on error. |
| */ |
| static inline int64_t audio_utils_get_real_time_ns() { |
| |
| #if defined(__linux__) |
| |
| struct timespec now_ts; |
| if (clock_gettime(CLOCK_REALTIME, &now_ts) == 0) { |
| return audio_utils_ns_from_timespec(&now_ts); |
| } |
| return 0; // should not happen. |
| |
| #else |
| |
| // Mac OS X compatible |
| struct timeval now_tv; |
| if (gettimeofday(&now_tv, NULL /* struct timezone * */) == 0) { |
| return now_tv.tv_sec * 1000000000LL + now_tv.tv_usec * 1000LL; |
| } |
| return 0; // should not happen. |
| |
| #endif |
| |
| } |
| |
| #endif // !ANDROID_AUDIO_CLOCK_H |