58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
/*
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* Copyright (C) 2022 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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// #define LOG_NDEBUG 0
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#define LOG_TAG "MonotonicFrameCounter"
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#include <utils/Log.h>
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#include "MonotonicFrameCounter.h"
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namespace android::audioflinger {
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int64_t MonotonicFrameCounter::updateAndGetMonotonicFrameCount(
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int64_t newFrameCount, int64_t newTime) {
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if (newFrameCount < 0 || newTime < 0) {
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const auto result = getLastReportedFrameCount();
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ALOGW("%s: invalid (frame, time) pair newFrameCount:%lld newFrameCount:%lld,"
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" using %lld as frameCount",
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__func__, (long long) newFrameCount, (long long)newFrameCount,
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(long long)result);
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return result;
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}
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if (newFrameCount < mLastReceivedFrameCount) {
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const auto result = getLastReportedFrameCount();
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ALOGW("%s: retrograde newFrameCount:%lld < mLastReceivedFrameCount:%lld,"
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" ignoring, returning %lld as frameCount",
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__func__, (long long) newFrameCount, (long long)mLastReceivedFrameCount,
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(long long)result);
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return result;
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}
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// Input looks fine.
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// For better granularity, we could consider extrapolation on newTime.
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mLastReceivedFrameCount = newFrameCount;
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return getLastReportedFrameCount();
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}
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int64_t MonotonicFrameCounter::onFlush() {
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ALOGV("%s: Updating mOffsetFrameCount:%lld with mLastReceivedFrameCount:%lld",
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__func__, (long long)mOffsetFrameCount, (long long)mLastReceivedFrameCount);
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mOffsetFrameCount += mLastReceivedFrameCount;
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mLastReceivedFrameCount = 0;
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return mOffsetFrameCount;
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}
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} // namespace android::audioflinger
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