srs/trunk/src/app/srs_app_hourglass.cpp

/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2021 Winlin
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <srs_app_hourglass.hpp>

using namespace std;

#include <srs_kernel_error.hpp>
#include <srs_kernel_log.hpp>
#include <srs_kernel_utility.hpp>

#include <srs_protocol_kbps.hpp>

SrsPps* _srs_pps_timer = new SrsPps();

extern SrsPps* _srs_pps_clock_15ms;
extern SrsPps* _srs_pps_clock_20ms;
extern SrsPps* _srs_pps_clock_25ms;
extern SrsPps* _srs_pps_clock_30ms;
extern SrsPps* _srs_pps_clock_35ms;
extern SrsPps* _srs_pps_clock_40ms;
extern SrsPps* _srs_pps_clock_80ms;
extern SrsPps* _srs_pps_clock_160ms;
extern SrsPps* _srs_pps_timer_s;

ISrsHourGlass::ISrsHourGlass()
{
}

ISrsHourGlass::~ISrsHourGlass()
{
}

SrsHourGlass::SrsHourGlass(string label, ISrsHourGlass* h, srs_utime_t resolution)
{
    label_ = label;
    handler = h;
    _resolution = resolution;
    total_elapse = 0;
    trd = new SrsSTCoroutine("timer", this, _srs_context->get_id());
}

SrsHourGlass::~SrsHourGlass()
{
    srs_freep(trd);
}

srs_error_t SrsHourGlass::start()
{
    srs_error_t err = srs_success;

    if ((err = trd->start()) != srs_success) {
        return srs_error_wrap(err, "start timer");
    }

    return err;
}

void SrsHourGlass::stop()
{
    trd->stop();
}

srs_error_t SrsHourGlass::tick(srs_utime_t interval)
{
    return tick(0, interval);
}

srs_error_t SrsHourGlass::tick(int event, srs_utime_t interval)
{
    srs_error_t err = srs_success;
    
    if (_resolution > 0 && (interval % _resolution) != 0) {
        return srs_error_new(ERROR_SYSTEM_HOURGLASS_RESOLUTION,
            "invalid interval=%dms, resolution=%dms", srsu2msi(interval), srsu2msi(_resolution));
    }
    
    ticks[event] = interval;
    
    return err;
}

void SrsHourGlass::untick(int event)
{
    map<int, srs_utime_t>::iterator it = ticks.find(event);
    if (it != ticks.end()) {
        ticks.erase(it);
    }
}

srs_error_t SrsHourGlass::cycle()
{
    srs_error_t err = srs_success;

    while (true) {
        if ((err = trd->pull()) != srs_success) {
            return srs_error_wrap(err, "quit");
        }
    
        map<int, srs_utime_t>::iterator it;
        for (it = ticks.begin(); it != ticks.end(); ++it) {
            int event = it->first;
            srs_utime_t interval = it->second;

            if (interval == 0 || (total_elapse % interval) == 0) {
                ++_srs_pps_timer->sugar;

                if ((err = handler->notify(event, interval, total_elapse)) != srs_success) {
                    return srs_error_wrap(err, "notify");
                }
            }
        }

        // TODO: FIXME: Maybe we should use wallclock.
        total_elapse += _resolution;
        srs_usleep(_resolution);
    }
    
    return err;
}

ISrsFastTimer::ISrsFastTimer()
{
}

ISrsFastTimer::~ISrsFastTimer()
{
}

SrsFastTimer::SrsFastTimer(std::string label, srs_utime_t resolution)
{
    timer_ = new SrsHourGlass(label, this, resolution);
}

SrsFastTimer::~SrsFastTimer()
{
    srs_freep(timer_);
}

srs_error_t SrsFastTimer::start()
{
    srs_error_t err = srs_success;

    if ((err = timer_->start()) != srs_success) {
        return srs_error_wrap(err, "start timer");
    }

    return err;
}

void SrsFastTimer::subscribe(srs_utime_t interval, ISrsFastTimer* timer)
{
    static int g_event = 0;

    int event = g_event++;

    // TODO: FIXME: Error leak. Change tick to void in future.
    timer_->tick(event, interval);

    handlers_[event] = timer;
}

void SrsFastTimer::unsubscribe(ISrsFastTimer* timer)
{
    for (map<int, ISrsFastTimer*>::iterator it = handlers_.begin(); it != handlers_.end();) {
        if (it->second != timer) {
            ++it;
            continue;
        }

        handlers_.erase(it++);

        int event = it->first;
        timer_->untick(event);
    }
}

srs_error_t SrsFastTimer::notify(int event, srs_utime_t interval, srs_utime_t tick)
{
    srs_error_t err = srs_success;

    for (map<int, ISrsFastTimer*>::iterator it = handlers_.begin(); it != handlers_.end(); ++it) {
        ISrsFastTimer* timer = it->second;

        if (event != it->first) {
            continue;
        }

        if ((err = timer->on_timer(interval, tick)) != srs_success) {
            return srs_error_wrap(err, "tick for event=%d, interval=%dms, tick=%dms",
                event, srsu2msi(interval), srsu2msi(tick));
        }

        break;
    }

    return err;
}

SrsClockWallMonitor::SrsClockWallMonitor()
{
}

SrsClockWallMonitor::~SrsClockWallMonitor()
{
}

srs_error_t SrsClockWallMonitor::on_timer(srs_utime_t interval, srs_utime_t tick)
{
    srs_error_t err = srs_success;

    static srs_utime_t clock = 0;

    srs_utime_t now = srs_update_system_time();
    if (!clock) {
        clock = now;
        return err;
    }

    srs_utime_t elapsed = now - clock;
    clock = now;

    if (elapsed <= 15 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_15ms->sugar;
    } else if (elapsed <= 21 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_20ms->sugar;
    } else if (elapsed <= 25 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_25ms->sugar;
    } else if (elapsed <= 30 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_30ms->sugar;
    } else if (elapsed <= 35 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_35ms->sugar;
    } else if (elapsed <= 40 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_40ms->sugar;
    } else if (elapsed <= 80 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_80ms->sugar;
    } else if (elapsed <= 160 * SRS_UTIME_MILLISECONDS) {
        ++_srs_pps_clock_160ms->sugar;
    } else {
        ++_srs_pps_timer_s->sugar;
    }

    return err;
}