C++基于linux+qt+mplayer实现的音乐播放器项目源码

#include "widget.h" #include "ui_widget.h" #include <pthread.h> #include <unistd.h> #include <QFile> #include <QTextStream> #include <QDebug> int f_s; int song_length=0; bool song_pause=false; int sound=-1; bool song_time_compare(Widget::Song_lrc v1,Widget::Song_lrc v2) { return v1.time<v2.time; } void* get_song_time(void* arg) { while(1) { int act_fd; if((act_fd = open("myfifo", O_WRONLY)) == -1) { perror("fail to open"); } sleep(1); if(song_pause==true && song_length<1) { if(write(act_fd,"get_time_length\n",strlen("get_time_length\n")) == -1) { perror("write"); } } sleep(1); if(sound==-1) { if(write(act_fd,"get_property volume\n",strlen("get_property volume\n")) == -1) { perror("write"); } } sleep(3); if(song_pause==true) { if(write(act_fd,"get_time_pos\n",strlen("get_time_pos\n")) == -1) { perror("write"); } } ::close(act_fd); } } void* get_recv_time(void* arg) { float stime = 0.0f; float time = 0.0f; int sounds = 0; while(1) { sleep(1); if(song_pause==true) { char buf[1024]; read(f_s, buf, sizeof(buf)); // 从管道读取数据 if(song_length<1) { if(strncmp(buf,"ANS_LENGTH", strlen("ANS_LENGTH")) == 0) { stime = 0.0f; sscanf(buf,"ANS_LENGTH=%f", &stime); song_length=stime*10; cout << "1:" << song_length << endl; } } if(sound==-1) { if(strncmp(buf,"ANS_volume", strlen("ANS_volume")) == 0) { sounds = 0; sscanf(buf,"ANS_volume=%d", &sounds); sound=sounds; //cout << "sounds:" << buf << endl; } } if(strncmp(buf,"ANS_TIME_POSITION", strlen("ANS_TIME_POSITION")) == 0) { time = 0.0f; sscanf(buf,"ANS_TIME_POSITION=%f", &time); cout << "2:" << time << endl; } } } } Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); } Widget::~Widget() { delete ui; } Widget::Widget(int fd0,QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); f_s = fd0; this->setWindowTitle("音乐播放器"); this->setFixedSize(800,550); init(); } void Widget::init() { pthread_t tid1; pthread_create(&tid1,NULL, get_song_time, NULL); pthread_detach(tid1); // pthread_t tid2; pthread_create(&tid2,NULL, get_recv_time, NULL); pthread_detach(tid2); // QStringList results_mp3,results_lrc; results_lrc=get_file.getfile("lrc"); results_mp3=get_file.getfile("mp3"); current_song=results_lrc[0]; foreach (QString s_lrc, results_lrc) { ui->file_song_comboBox->addItem(s_lrc); } ui->file_song_comboBox->setCurrentIndex(0); ui->textEdit_time->setText("00:00:0"); t = new QTimer(this);//加入对象树 //connect(t, &QTimer::timeout, [=]{ flush_game();}); connect(t,SIGNAL(timeout()),this,SLOT(song_update())); //t->start(1000); } void Widget::song_update() { if(song_length>1) { ui->horizontalSlider->setRange(0,song_length); ui->textEdit_sound->setText(QString::number(sound)); QString m = QString::number(t_m%10); QString s = QString::number(t_m/10/10%6)+QString::number(t_m/10%10); QString f = QString::number(t_m/10/60/10)+QString::number(t_m/10/60%10); ui->textEdit_time->setText(f+":"+s+":"+m); ui->horizontalSlider->setValue(t_m); // cout << "tm:" << t_m <<" t:"<< (song_lrc[t_s].time/100) << endl; if(t_m++==(song_lrc[t_s].time/100)) { qDebug()<<123; //ui->listWidget->setCurrentRow(t_s++); } if(t_m>song_length) { t->stop(); } } } void Widget::send_comm(char *comm) { int act_fd; if((act_fd = open("myfifo", O_WRONLY)) == -1) { perror("fail to open"); } if(write(act_fd,comm,strlen(comm)) == -1) //歌曲暂停 { perror("write"); } ::close(act_fd); } void Widget::on_file_song_comboBox_highlighted(const QString &arg1) { current_song = arg1; } void Widget::on_pushButton_select_song_clicked() { deal_file.song_line=0; ui->listWidget->clear(); song_lrc.clear(); deal_file.song_lrc.clear(); t_s=0; t_m=0; song_length=0; t->stop(); QString ss =QDir::currentPath()+"/res/"+current_song; QFile file(ss); if (file.open(QIODevice::ReadOnly | QIODevice::Text)) { QString line; QTextStream in(&file); //用文件构造流 line = in.readLine();//读取一行放到字符串里 while(!line.isNull())//字符串有内容 { line=in.readLine();//循环读取下行 string str_song=line.toStdString(); //deal_file(str_song); deal_file.deal_file(str_song); } } file.close(); for(int i=0;i<deal_file.song_lrc.size();i++) { s_lrc.song=deal_file.song_lrc[i].song; s_lrc.time=deal_file.song_lrc[i].time; s_lrc.line=deal_file.song_lrc[i].line; song_lrc.push_back(s_lrc); } sort(song_lrc.begin(),song_lrc.end(),song_time_compare); for(int i=0;i<song_lrc.size();i++) { // ui->listWidget->addItem(QString::number(song_lrc[i].line)); ui->listWidget->addItem(QString::fromStdString(song_lrc[i].song)); } // } void Widget::mousePressEvent(QMouseEvent *ev) { // 获取当前点击位置,得到的这个鼠标坐标是相对于当前QSlider的坐标 int currentX = ev->pos().x(); // 获取当前点击的位置占整个Slider的百分比 double per = currentX * 1.0 / ui->horizontalSlider->width()-0.1; qDebug()<<per; if(per>0.009 && per<1.0) { ui->horizontalSlider->setValue(per*song_length); } char buff[60]; //qDebug()<< int(per*song_length)/10; sprintf(buff,"seek %d 2\n",int(per*song_length)/10); cout << buff << endl; send_comm(buff); // 利用算得的百分比得到具体数字 // int value = per * (this->maximum() - this->minimum()) + this->minimum(); // 设定滑动条位置 // this->setValue(value); // 滑动条移动事件等事件也用到了mousePressEvent,加这句话是为了不对其产生影响，是的Slider能正常相应其他鼠标事件 // QSlider::mousePressEvent(ev); } void Widget::on_pushButton_play_clicked() { t->start(100); song_pause=true; QStringList list = current_song.split("."); QString ss ="loadfile ../QT_music_mplayer/res/"+list[0]+".mp3"+"\n"; std::string stdstr=ss.toStdString(); const char *ch = stdstr.c_str(); char *chh = const_cast<char*>(ch);// this->send_comm(chh); } void Widget::on_pushButton_pause_clicked() { this->send_comm("pause\n"); if(song_pause==true) { song_pause=false; t->stop(); } else { song_pause=true; t->start(100); } } void Widget::on_horizontalSlider_valueChanged(int value) { QString m = QString::number(value%10); QString s = QString::number(value/10/10%6)+QString::number(value/10%10); QString f = QString::number(value/10/60/10)+QString::number(value/10/60%10); QString time = f+":"+s+":"+m; // ui->horizontalSlider->setR