RecordControlApplication/Channel.cpp

#include "Channel.h"
#include <QProcess>
#include <QTime>

LinkObject* Channel::audioInput = nullptr;
LinkObject* Channel::audioOutput = nullptr;
LinkObject* Channel::rtspServer = nullptr;
LinkObject* Channel::file = nullptr;
LinkObject* Channel::audioDecoder = nullptr;
LinkObject* Channel::videoDecoder = nullptr;

extern LinkObject* vo;
extern LinkObject* vo1;

const char* VideoPath = "/root/usb/videos";
const char* SnapPath = "/root/usb/snap";

Channel::Channel(QObject* parent)
    : QObject(parent)
{
    timer = new QTimer();
    timer->setInterval(duration);
    timer->stop();

    videoInput = nullptr;
    videoOutput = nullptr;
    videoEncoder = nullptr;
    audioEncoder = nullptr;
    record = nullptr;
    rtsp = nullptr;
    snap = Link::create("EncodeV");
    overLay = Link::create("Overlay");

    if (audioInput == nullptr) {
        audioInput = Link::create("InputAlsa");
        QVariantMap dataIn;
        dataIn["path"] = "hw:0,0";

        audioInput->start(dataIn);
    }
    if (audioOutput == nullptr) {
        audioOutput = Link::create("OutputAlsa");
        QVariantMap dataOut;
        dataOut["path"] = "hw:0,0";
        audioOutput->start(dataOut);
    }
    if (rtspServer == nullptr) {
        rtspServer = Link::create("Rtsp");
        rtspServer->start();
    }
    if (file == nullptr) {
        file = Link::create("InputFile");

        // one video playback end
        connect(file, &LinkObject::newEvent, [=](QString type, QVariant) {
            if (type == "EOF") {
                qDebug() << "one video playback end";
            }
        });
    }
    if (audioDecoder == nullptr) {
        audioDecoder = Link::create("DecodeA");
        audioDecoder->start();
        file->linkA(audioDecoder)->linkA(audioOutput);
    }
    if (videoDecoder == nullptr) {
        videoDecoder = Link::create("DecodeV");
        videoDecoder->start();
        file->linkV(videoDecoder);
    }

    connect(timer, SIGNAL(timeout()), this, SLOT(onTimeout()));
}

/**
 * @brief load configuration and init components
 */
void Channel::init()
{
    if (channelName.isEmpty()) {
        qDebug() << "channel name is empty!";
        return;
    }
    if (channelName == "HDMI-A") {
        videoOutput = vo;
    } else {
        videoOutput = vo1;
    }

    // init video input by channel name
    videoInput = Link::create("InputVi");
    QVariantMap dataVi;
    dataVi["interface"] = channelName;
    videoInput->start(dataVi);

    // start water mask
    // overLay->start();

    // link video input and output, and add water mask
    videoInput->linkV(videoOutput);

    // capture  picture from video
    QVariantMap dataSnap;
    dataSnap["codec"] = "jpeg";
    dataSnap["snap"] = true;
    dataSnap["width"] = 1920;
    dataSnap["height"] = 1080;
    snap->start(dataSnap);
    videoInput->linkV(snap);
    // sleep 1s, if didnt sleep , function snap would return flase and capture failed
    QThread::sleep(1);

    // video encode
    videoEncoder = Link::create("EncodeV");
    videoEncoder->start(videoEncoderParams);

    // audio encode
    audioEncoder = Link::create("EncodeA");
    audioEncoder->start(audioEncoderParams);

    // record
    record = Link::create("Mux");
    QVariantMap dataMp4;
    dataMp4["format"] = "mp4";
    record->setData(dataMp4);
    videoInput->linkV(videoEncoder)->linkV(record);
    audioInput->linkA(audioEncoder)->linkA(record);

    // rtsp
    rtsp = Link::create("Mux");
    QVariantMap dataRtsp;
    dataRtsp["path"] = QString("mem://%1").arg(pushCode);
    dataRtsp["format"] = "rtsp";
    rtsp->start(dataRtsp);
    videoInput->linkV(videoEncoder)->linkV(rtsp)->linkV(rtspServer);
    audioInput->linkA(audioEncoder)->linkA(rtsp)->linkA(rtspServer);
}

/**
 * @brief end previous record and start new record
 */
void Channel::onTimeout()
{
    record->stop(true);
    timer->stop();

    if (!isMountDisk()) {
        return;
    }
    QString curTime = QDateTime::currentDateTime().toString("yyyy-MM-dd_hh:mm:ss");
    QVariantMap dataRecord;
    dataRecord["path"] = QString("%1/%2/%3.mp4").arg(VideoPath).arg(channelName).arg(curTime);
    record->setData(dataRecord);
    record->start();

    timer->start();
    snap->invoke("snapSync", QString("%1/%2/%3.jpg").arg(SnapPath).arg(channelName).arg(curTime));
}

/**
 * @brief start record
 */
void Channel::startRecord()
{
    if (!isMountDisk()) {
        return;
    }
    QString curTime = QDateTime::currentDateTime().toString("yyyy-MM-dd_hh:mm:ss");
    QVariantMap dataRecord;
    // /usb/root/videos/HDMI-A/2024-1-1_10:00:00
    dataRecord["path"] = QString("%1/%2/%3.mp4").arg(VideoPath).arg(channelName).arg(curTime);
    record->setData(dataRecord);
    record->start();
    //    setOverlay("Record");

    timer->start();
    snap->invoke("snapSync", QString("%1/%2/%3.jpg").arg(SnapPath).arg(channelName).arg(curTime));
}

/**
 * @brief stop record
 */
void Channel::stopRecord()
{
    record->stop(true);
    //    setOverlay("No Record");
    timer->stop();
}

/**
 * @brief start playback and output hdmi signals
 * @param fileName
 */
void Channel::startPlayback(QString fileName)
{
    QString path = QString("%1/%2/%3").arg(VideoPath).arg(channelName).arg(fileName);

    // break video input and output
    videoInput->unLinkV(videoOutput);

    videoDecoder->linkV(videoOutput);

    QVariantMap dataFile;
    dataFile["path"] = path;
    file->start(dataFile);

    isPlayback = true;
}

/**
 * @brief play live
 */
void Channel::startPlayLive()
{
    videoDecoder->unLinkV(videoOutput);
    file->stop(true);

    videoInput->linkV(videoOutput);
    isPlayback = false;
}

/**
 * @brief playback -10s
 */
void Channel::back()
{
    qDebug() << "back 10s";
    int curPos = file->invoke("getPosition").toInt();
    curPos -= 10 * 100;
    file->invoke("seek", curPos);
}

/**
 * @brief playback +10s
 */
void Channel::forward()
{
    qDebug() << "forward 10s";
    int curPos = file->invoke("getPosition").toInt();
    curPos += 10 * 100;
    file->invoke("seek", curPos);
}

/**
 * @brief Channel::togglePause
 */
void Channel::togglePause()
{
    isPause = !isPause;
    file->invoke("pause", isPause);
}

/**
 * @brief open console process, and use it by command
 * @param com
 * @return
 */
QString Channel::writeCom(const QString& com)
{
    QProcess proc;
    QStringList argList;
    argList << "-c" << com;
    proc.start("/bin/sh", argList);
    // wait process start
    proc.waitForFinished();
    proc.waitForReadyRead();
    // read data from console
    QByteArray procOutput = proc.readAll();
    proc.close();
    return QString(procOutput);
}

/**
 * @brief judge the disk whether mounted
 * @return
 */
bool Channel::isMountDisk()
{
    QString mount = writeCom("df /root/usb");
    if (!mount.contains("/root/usb"))
        return false;
    return true;
}