Write audio performance data to file
Created new file ReportPerformacne.cpp with file writing
functionality. When short-term histogram array is full,
its data is aggregated into a long-term histogram array.
Cleaned up documentation and comments.
Test: dumpsys media.log
Change-Id: I19f48ea27ffc8205e67ea4ded04615d33a422966
diff --git a/media/libnbaio/ReportPerformance.cpp b/media/libnbaio/ReportPerformance.cpp
new file mode 100644
index 0000000..dc50ada
--- /dev/null
+++ b/media/libnbaio/ReportPerformance.cpp
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#define LOG_TAG "ReportPerformance"
+
+#include <fstream>
+#include <iostream>
+#include <queue>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/prctl.h>
+#include <utility>
+#include <media/nbaio/NBLog.h>
+#include <media/nbaio/PerformanceAnalysis.h>
+#include <media/nbaio/ReportPerformance.h>
+// #include <utils/CallStack.h> // used to print callstack
+#include <utils/Log.h>
+#include <utils/String8.h>
+
+namespace android {
+
+namespace ReportPerformance {
+
+// Writes outlier intervals, timestamps, and histograms spanning long time intervals to a file.
+// TODO: format the data efficiently and write different types of data to different files
+void writeToFile(std::deque<std::pair<outlierInterval, timestamp>> &outlierData,
+ std::deque<std::pair<timestamp, Histogram>> &hists,
+ const char * kName,
+ bool append) {
+ ALOGD("writing performance data to file");
+ if (outlierData.empty() || hists.empty()) {
+ return;
+ }
+
+ std::ofstream ofs;
+ ofs.open(kName, append ? std::ios::app : std::ios::trunc);
+ if (!ofs.is_open()) {
+ ALOGW("couldn't open file %s", kName);
+ return;
+ }
+ ofs << "Outlier data: interval and timestamp\n";
+ for (const auto &outlier : outlierData) {
+ ofs << outlier.first << ": " << outlier.second << "\n";
+ }
+ ofs << "Histogram data\n";
+ for (const auto &hist : hists) {
+ ofs << "\ttimestamp\n";
+ ofs << hist.first << "\n";
+ ofs << "\tbuckets and counts\n";
+ for (const auto &bucket : hist.second) {
+ ofs << bucket.first << ": " << bucket.second << "\n";
+ }
+ }
+ ofs.close();
+}
+
+} // namespace ReportPerformance
+
+} // namespace android