From 6b2820fa9325dc0cb3c56f95d75809e271d0b6c8 Mon Sep 17 00:00:00 2001
From: boxwall <hezhiqiang19@huawei.com>
Date: Mon, 7 Nov 2022 21:58:29 +0800
Subject: [PATCH] add high-resolution sleep

Signed-off-by: boxwall <hezhiqiang19@huawei.com>
Change-Id: I26dbf067aed7e7af9e9eab29cbded8d80527eab4
---
 .../native/audioutils/include/audio_utils.h   | 10 ++++
 .../native/audioutils/src/audio_utils.cpp     | 57 +++++++++++++++++++
 2 files changed, 67 insertions(+)

diff --git a/frameworks/native/audioutils/include/audio_utils.h b/frameworks/native/audioutils/include/audio_utils.h
index 4b2d48838..fdbbad9c3 100644
--- a/frameworks/native/audioutils/include/audio_utils.h
+++ b/frameworks/native/audioutils/include/audio_utils.h
@@ -17,8 +17,18 @@
 
 #include <cstdint>
 
+#define AUDIO_MS_PER_SECOND 1000
+#define AUDIO_US_PER_SECOND 1000000
+#define AUDIO_NS_PER_SECOND ((int64_t)1000000000)
 namespace OHOS {
 namespace AudioStandard {
+class ClockTime {
+public:
+    static int64_t GetCurNano();
+    static int32_t AbsoluteSleep(int64_t nanoTime);
+    static int32_t RelativeSleep(int64_t nanoTime);
+};
+
 int64_t GetNowTimeMs();
 int64_t GetNowTimeUs();
 void AdjustStereoToMonoForPCM8Bit(int8_t *data, uint64_t len);
diff --git a/frameworks/native/audioutils/src/audio_utils.cpp b/frameworks/native/audioutils/src/audio_utils.cpp
index 791ea8dd4..b08dda32b 100644
--- a/frameworks/native/audioutils/src/audio_utils.cpp
+++ b/frameworks/native/audioutils/src/audio_utils.cpp
@@ -14,6 +14,8 @@
  */
 
 #include <chrono>
+#include <cinttypes>
+#include <ctime>
 #include <sstream>
 #include <ostream>
 #include "audio_utils.h"
@@ -22,6 +24,61 @@
 
 namespace OHOS {
 namespace AudioStandard {
+int64_t ClockTime::GetCurNano()
+{
+    int64_t result = -1; // -1 for bad result.
+    struct timespec time;
+    clockid_t clockId = CLOCK_MONOTONIC;
+    int ret = clock_gettime(clockId, &time);
+    if (ret < 0) {
+        AUDIO_WARNING_LOG("GetCurNanoTime fail, result:%{public}d", ret);
+        return result;
+    }
+    result = (time.tv_sec * AUDIO_NS_PER_SECOND) + time.tv_nsec;
+    return result;
+}
+
+int32_t ClockTime::AbsoluteSleep(int64_t nanoTime)
+{
+    int32_t ret = -1; // -1 for bad result.
+    if (nanoTime <= 0) {
+        AUDIO_WARNING_LOG("AbsoluteSleep invalid sleep time :%{public}" PRId64 " ns", nanoTime);
+        return ret;
+    }
+    struct timespec time;
+    time.tv_sec = nanoTime / AUDIO_NS_PER_SECOND;
+    time.tv_nsec = nanoTime - (time.tv_sec * AUDIO_NS_PER_SECOND); // Avoids % operation.
+
+    clockid_t clockId = CLOCK_MONOTONIC;
+    ret = clock_nanosleep(clockId, TIMER_ABSTIME, &time, nullptr);
+    if (ret != 0) {
+        AUDIO_WARNING_LOG("AbsoluteSleep may failed, ret is :%{public}d", ret);
+    }
+
+    return ret;
+}
+
+int32_t ClockTime::RelativeSleep(int64_t nanoTime)
+{
+    int32_t ret = -1; // -1 for bad result.
+    if (nanoTime <= 0) {
+        AUDIO_WARNING_LOG("AbsoluteSleep invalid sleep time :%{public}" PRId64 " ns", nanoTime);
+        return ret;
+    }
+    struct timespec time;
+    time.tv_sec = nanoTime / AUDIO_NS_PER_SECOND;
+    time.tv_nsec = nanoTime - (time.tv_sec * AUDIO_NS_PER_SECOND); // Avoids % operation.
+
+    clockid_t clockId = CLOCK_MONOTONIC;
+    const int relativeFlag = 0; // flag of relative sleep.
+    ret = clock_nanosleep(clockId, relativeFlag, &time, nullptr);
+    if (ret != 0) {
+        AUDIO_WARNING_LOG("RelativeSleep may failed, ret is :%{public}d", ret);
+    }
+
+    return ret;
+}
+
 int64_t GetNowTimeMs()
 {
     std::chrono::milliseconds nowMs =
-- 
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