89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
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/*
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* Copyright (C) 2023 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 "media/VectorRecorder.h"
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namespace android::media {
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// Convert data to string with level indentation.
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// No need for a lock as the SimpleLog is thread-safe.
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std::string VectorRecorder::toString(size_t indent) const {
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return mRecordLog.dumpToString(std::string(indent, ' ').c_str(), mMaxLocalLogLine);
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}
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// Record into local log when it is time.
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void VectorRecorder::record(const std::vector<float>& record) {
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if (record.size() != mVectorSize) return;
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// Protect against concurrent calls to record().
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std::lock_guard lg(mLock);
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// if it is time, record average data and reset.
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if (shouldRecordLog_l()) {
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sumToAverage_l();
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mRecordLog.log(
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"mean: %s, min: %s, max %s, calculated %zu samples in %0.4f second(s)",
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toString(mSum, mDelimiterIdx, mFormatString.c_str()).c_str(),
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toString(mMin, mDelimiterIdx, mFormatString.c_str()).c_str(),
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toString(mMax, mDelimiterIdx, mFormatString.c_str()).c_str(),
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mNumberOfSamples,
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mNumberOfSecondsSinceFirstSample.count());
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resetRecord_l();
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}
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// update stream average.
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if (mNumberOfSamples++ == 0) {
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mFirstSampleTimestamp = std::chrono::steady_clock::now();
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for (size_t i = 0; i < mVectorSize; ++i) {
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const float value = record[i];
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mSum[i] += value;
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mMax[i] = value;
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mMin[i] = value;
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}
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} else {
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for (size_t i = 0; i < mVectorSize; ++i) {
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const float value = record[i];
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mSum[i] += value;
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mMax[i] = std::max(mMax[i], value);
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mMin[i] = std::min(mMin[i], value);
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}
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}
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}
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bool VectorRecorder::shouldRecordLog_l() {
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mNumberOfSecondsSinceFirstSample = std::chrono::duration_cast<std::chrono::seconds>(
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std::chrono::steady_clock::now() - mFirstSampleTimestamp);
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return mNumberOfSecondsSinceFirstSample >= mRecordThreshold;
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}
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void VectorRecorder::resetRecord_l() {
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mSum.assign(mVectorSize, 0);
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mMax.assign(mVectorSize, 0);
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mMin.assign(mVectorSize, 0);
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mNumberOfSamples = 0;
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mNumberOfSecondsSinceFirstSample = std::chrono::seconds(0);
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}
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void VectorRecorder::sumToAverage_l() {
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if (mNumberOfSamples == 0) return;
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const float reciprocal = 1.f / mNumberOfSamples;
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for (auto& p : mSum) {
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p *= reciprocal;
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}
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}
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} // namespace android::media
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