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/*
* Copyright (C) 2018 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 <chrono>
#include <iostream>
#include <fstream>
#include <signal.h>
#include <thread>
#include <unistd.h>
#include "histogram_collector.h"
void sigint_handler(int) {
}
void show_usage(char* progname) {
std::cout << "Usage: ./" + std::string(progname) + " {options} \n"
<< "Sample the V (as in HSV) channel of the pixels that were displayed onscreen.\n\n"
<< "\tOptions:\n"
<< "\t-h display this help message\n"
<< "\t-o write output to specified filename\n"
<< "\t-t NUM Collect results over NUM seconds, and then exit\n"
<< "\t-m NUM Only store the last NUM frames of statistics\n";
}
int main(int argc, char** argv) {
struct sigaction sigHandler;
sigHandler.sa_handler = sigint_handler;
sigemptyset(&sigHandler.sa_mask);
sigHandler.sa_flags = 0;
sigaction(SIGINT, &sigHandler, NULL);
int c;
char * output_filename = NULL;
int timeout = -1;
while ((c = getopt(argc, argv, "o:t:h")) != -1) {
switch (c) {
case 'o': output_filename = optarg; break;
case 't': timeout = strtol(optarg, NULL, 10); break;
default:
case 'h': show_usage(argv[0]); return EXIT_SUCCESS;
}
}
histogram::HistogramCollector histogram;
histogram.start();
bool cancelled_during_wait = false;
if (timeout > 0) {
std::cout << "Sampling for " << timeout << " seconds.\n";
struct timespec request, remaining;
request.tv_sec = timeout;
request.tv_nsec = 0;
cancelled_during_wait = (nanosleep(&request, &remaining) != 0);
} else {
std::cout << "Sampling until Ctrl-C is pressed\n";
sigsuspend(&sigHandler.sa_mask);
}
std::cout << "Sampling results:\n";
histogram.stop();
if (cancelled_during_wait) {
std::cout << "Timed histogram collection cancelled via signal\n";
return EXIT_SUCCESS;
}
if (output_filename) {
std::cout << "\nWriting statistics to: " << output_filename << '\n';
std::ofstream output_file;
output_file.open(output_filename);
if (!output_file.is_open()) {
std::cerr << "Error, could not open given file: " << output_filename << "\n";
return EXIT_FAILURE;
}
output_file << histogram.Dump();
output_file.close();
} else {
std::cout << histogram.Dump() << '\n';
}
return EXIT_SUCCESS;
}
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