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86 lines
3.3 KiB
C++
86 lines
3.3 KiB
C++
/*
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* Copyright 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sched.h>
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#include <cstring>
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#include "AudioStreamGateway.h"
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#include "common/OboeDebug.h"
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#include "oboe/Oboe.h"
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#include "OboeStreamCallbackProxy.h"
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#include "OboeTesterStreamCallback.h"
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#include "OboeTools.h"
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#include "synth/IncludeMeOnce.h"
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int32_t OboeTesterStreamCallback::mHangTimeMillis = 0;
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// Print if scheduler changes.
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void OboeTesterStreamCallback::printScheduler() {
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#if OBOE_ENABLE_LOGGING
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int scheduler = sched_getscheduler(gettid());
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if (scheduler != mPreviousScheduler) {
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int schedulerType = scheduler & 0xFFFF; // mask off high flags
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LOGD("callback CPU scheduler = 0x%08x = %s",
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scheduler,
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((schedulerType == SCHED_FIFO) ? "SCHED_FIFO" :
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((schedulerType == SCHED_OTHER) ? "SCHED_OTHER" :
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((schedulerType == SCHED_RR) ? "SCHED_RR" : "UNKNOWN")))
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);
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mPreviousScheduler = scheduler;
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}
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#endif
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}
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// Sleep to cause an XRun. Then reschedule.
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void OboeTesterStreamCallback::maybeHang(const int64_t startNanos) {
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if (mHangTimeMillis == 0) return;
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if (startNanos > mNextTimeToHang) {
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LOGD("%s() start sleeping", __func__);
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// Take short naps until it is time to wake up.
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int64_t nowNanos = startNanos;
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int64_t wakeupNanos = startNanos + (mHangTimeMillis * NANOS_PER_MILLISECOND);
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while (nowNanos < wakeupNanos && mHangTimeMillis > 0) {
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int32_t sleepTimeMicros = (int32_t) ((wakeupNanos - nowNanos) / 1000);
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if (sleepTimeMicros == 0) break;
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// The usleep() function can fail if it sleeps for more than one second.
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// So sleep for several small intervals.
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// This also allows us to exit the loop if mHangTimeMillis gets set to zero.
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const int32_t maxSleepTimeMicros = 100 * 1000;
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sleepTimeMicros = std::min(maxSleepTimeMicros, sleepTimeMicros);
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usleep(sleepTimeMicros);
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nowNanos = getNanoseconds();
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}
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// Calculate when we hang again.
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const int32_t minDurationMillis = 500;
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const int32_t maxDurationMillis = std::max(10000, mHangTimeMillis * 2);
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int32_t durationMillis = mHangTimeMillis * 10;
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durationMillis = std::max(minDurationMillis, std::min(maxDurationMillis, durationMillis));
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mNextTimeToHang = startNanos + (durationMillis * NANOS_PER_MILLISECOND);
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LOGD("%s() slept for %d msec, durationMillis = %d", __func__,
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(int)((nowNanos - startNanos) / 1e6L),
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durationMillis);
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}
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}
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int64_t OboeTesterStreamCallback::getNanoseconds(clockid_t clockId) {
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struct timespec time;
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int result = clock_gettime(clockId, &time);
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if (result < 0) {
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return result;
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}
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return (time.tv_sec * 1e9) + time.tv_nsec;
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} |