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/*
* Copyright 2020 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.
*/
#include <sched.h>
#include <cstring>
#include "AudioStreamGateway.h"
#include "common/OboeDebug.h"
#include "oboe/Oboe.h"
#include "OboeStreamCallbackProxy.h"
#include "OboeTesterStreamCallback.h"
#include "OboeTools.h"
#include "synth/IncludeMeOnce.h"
int32_t OboeTesterStreamCallback::mHangTimeMillis = 0;
// Print if scheduler changes.
void OboeTesterStreamCallback::printScheduler() {
#if OBOE_ENABLE_LOGGING
int scheduler = sched_getscheduler(gettid());
if (scheduler != mPreviousScheduler) {
int schedulerType = scheduler & 0xFFFF; // mask off high flags
LOGD("callback CPU scheduler = 0x%08x = %s",
scheduler,
((schedulerType == SCHED_FIFO) ? "SCHED_FIFO" :
((schedulerType == SCHED_OTHER) ? "SCHED_OTHER" :
((schedulerType == SCHED_RR) ? "SCHED_RR" : "UNKNOWN")))
);
mPreviousScheduler = scheduler;
}
#endif
}
// Sleep to cause an XRun. Then reschedule.
void OboeTesterStreamCallback::maybeHang(const int64_t startNanos) {
if (mHangTimeMillis == 0) return;
if (startNanos > mNextTimeToHang) {
LOGD("%s() start sleeping", __func__);
// Take short naps until it is time to wake up.
int64_t nowNanos = startNanos;
int64_t wakeupNanos = startNanos + (mHangTimeMillis * NANOS_PER_MILLISECOND);
while (nowNanos < wakeupNanos && mHangTimeMillis > 0) {
int32_t sleepTimeMicros = (int32_t) ((wakeupNanos - nowNanos) / 1000);
if (sleepTimeMicros == 0) break;
// The usleep() function can fail if it sleeps for more than one second.
// So sleep for several small intervals.
// This also allows us to exit the loop if mHangTimeMillis gets set to zero.
const int32_t maxSleepTimeMicros = 100 * 1000;
sleepTimeMicros = std::min(maxSleepTimeMicros, sleepTimeMicros);
usleep(sleepTimeMicros);
nowNanos = getNanoseconds();
}
// Calculate when we hang again.
const int32_t minDurationMillis = 500;
const int32_t maxDurationMillis = std::max(10000, mHangTimeMillis * 2);
int32_t durationMillis = mHangTimeMillis * 10;
durationMillis = std::max(minDurationMillis, std::min(maxDurationMillis, durationMillis));
mNextTimeToHang = startNanos + (durationMillis * NANOS_PER_MILLISECOND);
LOGD("%s() slept for %d msec, durationMillis = %d", __func__,
(int)((nowNanos - startNanos) / 1e6L),
durationMillis);
}
}
int64_t OboeTesterStreamCallback::getNanoseconds(clockid_t clockId) {
struct timespec time;
int result = clock_gettime(clockId, &time);
if (result < 0) {
return result;
}
return (time.tv_sec * 1e9) + time.tv_nsec;
}
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