390 lines
14 KiB
C++
390 lines
14 KiB
C++
#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <pthread.h>
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int mplayer_pid; // 子进程号
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pthread_t t1,t2; // 线程
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char current_song_path_name[128] = ""; // 当前歌曲路径
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int currentVolume = 50; // 当前音量
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void *getTimerThreadFunc(void *arg); // 发送获取当前时间的 mplayer 命令
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void *readPipeMSG(void *arg); // 获取当前时间的线程
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent)
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, ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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QSize windowSize = QSize(geometry().width(), geometry().height());
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// 设置背景图片
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setAutoFillBackground(true);
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QPalette pal = this->palette();
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pal.setBrush(backgroundRole(),QPixmap(":/img/background1").scaled(windowSize, Qt::KeepAspectRatio));
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setPalette(pal);
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initMainWindow(); // 初始化主界面
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mplayerInit(); // 初始化 mplayer
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kill(mplayer_pid,SIGSTOP);
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scanSong(); // 扫描歌曲列表
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setSongList(); // 将扫描的歌曲显示到歌曲列表中
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// 捕获当前时间信号
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connect(this, SIGNAL(currentTimeSignal(int)), this, SLOT(setCurrentTimeLabel(int)));
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// 建立歌曲进度滑块修改信号通讯
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connect(this, SIGNAL(currentProgressSignal(int)), this, SLOT(setCurrentSlider(int)));
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// 建立音量大小滑块信号通讯
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// connect(this, SIGNAL(currentVolumeSignal(int)), this, SLOT(setVolumeSlider(int)));
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}
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MainWindow::~MainWindow()
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{
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if(mplayer_pid != 0)
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kill(mplayer_pid,SIGKILL);
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delete ui;
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}
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void MainWindow::initMainWindow()
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{
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// 设置主窗体属性
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setWindowTitle("音乐播放器");
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setFixedSize(1055,750);
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setWindowIcon(QIcon(":/icon/button"));
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// 设置子组件背景透明
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ui->song_list_widget->setAttribute(Qt::WA_TranslucentBackground);
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ui->label_artist->setAttribute(Qt::WA_TranslucentBackground);
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ui->label_song_list->setAttribute(Qt::WA_TranslucentBackground);
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ui->label_song_name->setAttribute(Qt::WA_TranslucentBackground);
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ui->label_meta_album->setAttribute(Qt::WA_TranslucentBackground);
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ui->contrl_widget->setAttribute(Qt::WA_TranslucentBackground);
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ui->widget_show->setAttribute(Qt::WA_TranslucentBackground);
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ui->volume_widget->setAttribute(Qt::WA_TranslucentBackground);
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ui->widget_3->setAttribute(Qt::WA_TranslucentBackground);
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ui->time_left_label->setAttribute(Qt::WA_TranslucentBackground);
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ui->time_right_label->setAttribute(Qt::WA_TranslucentBackground);
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ui->time_widget->setAttribute(Qt::WA_TranslucentBackground);
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// 设置按钮属性
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// 设置滑块属性
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ui->time_slider->setStyleSheet("QSlider::groove:horizontal { background-color: white; }"
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"QSlider::handle:horizontal { background-color: yellow; width: 20px;}");
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ui->volume_slider->setStyleSheet("QSlider::groove:horizontal { background-color: gray; }"
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"QSlider::handle:horizontal { background-color: yellow; width: 20px;}");
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ui->volume_slider->setMinimum(0); // 最小音量 0
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ui->volume_slider->setMaximum(100); // 最大音量 100
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// 当前音量从 mplayer 属性获取
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// QSlider* slider = new QSlider(Qt::Horizontal);
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// slider->setMinimum(0); // 设置最小值
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// slider->setMaximum(100); // 设置最大值
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// slider->setValue(50); // 设置当前值
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// slider->setSingleStep(1); // 设置步长
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}
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void MainWindow::mplayerInit()
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{
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// 创建一个无名管道
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pipe(fd);
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// 创建有名管道
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mkfifo("fifo_cmd", 0666);
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// 创建 子进程启动 mplayer
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pid_t pid = fork();
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if(pid == 0) // 子进程
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{
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// 重定向标准输出
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dup2(fd[1], 1);
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// 使用 exec 启动 mplayer
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// execlp("mplayer","mplayer","-idle","-slave","-quiet","/home/flykhan/qtmplayer/song/StopLove.mp3",NULL);
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execlp("/usr/bin/mplayer","mplayer","-idle","-slave","-quiet","-input","file=fifo_cmd","/home/flykhan/qtmplayer/song/Diamonds.mp3",NULL);
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_exit(-1); // 异常退出
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}
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else if(pid>0) // 父进程
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{
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mplayer_pid = pid;
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pthread_create(&t1,NULL,getTimerThreadFunc,this);
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pthread_create(&t2,NULL,readPipeMSG,this);
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volume_control(currentVolume, 1); // 初始音量设置为 currentVolume->50
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setVolumeSlider(currentVolume); // 设置音量滑块初始位置
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// pthread_detach(t1);
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// pthread_detach(t2);
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// 打开管道
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// 以写的方式打开(阻塞到某进程 以读的方式打开)
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fifo_fd = open("fifo_cmd", O_WRONLY);
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if(fifo_fd < 0){
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perror("open");
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// return 0;
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_exit(0); // 管道打开失败直接返回
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}
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}
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}
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void MainWindow::scanSong()
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{
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// 1. 得到目录句柄
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DIR *dir = opendir("/home/flykhan/qtmplayer/song");
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if(NULL == dir)
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{
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perror("opendir");
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_exit(0); // 目录为空返回
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}
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// 2. 根据目录句柄扫描当前文件
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while(1)
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{
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// 读取文件目录
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struct dirent *dirent = readdir(dir);
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if(NULL==dirent)
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break;
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// 判断类型为 DT_REG->文件类型
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if(dirent->d_type == DT_REG)
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{
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// 如果扫描到的文件名包含 ".mp3"，则将该文件名添加到向量数组中
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if(strstr(dirent->d_name, ".mp3") != NULL)
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{
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vectorSong.push_back(string(dirent->d_name));
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}
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}
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}
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// 关闭目录句柄
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closedir(dir);
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}
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void MainWindow::playNextSong()
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{
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index++;
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if(index == vectorSong.size())
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index = 0; // 当索引到达歌曲最后一个时，将索引置为 0 ，循环索引
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char changeSongBuf[128] = "";
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// 将 loadfile 'song_name_path' 写入字符数组
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int len = sprintf(changeSongBuf, "loadfile /home/flykhan/qtmplayer/song/%s\n", vectorSong[index].c_str());
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// int len = sprintf(changeSongBuf, "loadfile ./song/%s\n", vectorSong[index].c_str());
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qDebug() << changeSongBuf << endl; // 控制台打印下一首歌的名字
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// write(this->fifo_fd, changeSongBuf.toUtf8().toStdString().c_str(),changeSongBuf.toUtf8().toStdString().size());
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ui->song_list_widget->setCurrentRow(index);
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write(this->fifo_fd, changeSongBuf, len); // 将获取的下一首歌曲名写入到有名管道中
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}
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void MainWindow::playLastSong()
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{
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index--;
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if(index == -1)
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index = vectorSong.size() - 1; // 当索引到达歌曲 0 时，将索引置为最后一个歌曲，循环索引
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char changeSongBuf[128] = "";
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// 将 loadfile 'song_name_path' 写入字符数组
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int len = sprintf(changeSongBuf, "loadfile /home/flykhan/qtmplayer/song/%s\n", vectorSong[index].c_str());
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// int len = sprintf(changeSongBuf, "loadfile ./song/%s\n", vectorSong[index].c_str());
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qDebug() << changeSongBuf << endl; // 控制台打印下一首歌的名字
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// write(this->fifo_fd, changeSongBuf.toUtf8().toStdString().c_str(),changeSongBuf.toUtf8().toStdString().size());
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ui->song_list_widget->setCurrentRow(index);
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write(this->fifo_fd, changeSongBuf, len); // 将获取的下一首歌曲名写入到有名管道中
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}
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void MainWindow::setCurrentTimeLabel(int time)
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{
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int m = 0, s = 0;
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m = time / 60; // 算分钟
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s = time % 60; // 算秒钟
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char buf[32] = "";
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sprintf(buf,"%02d:%02d",m,s);
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// 将歌曲当前时间设置到 label
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ui->time_left_label->setText(QString(buf));
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}
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void MainWindow::setCurrentSlider(int currentProgress)
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{
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// 设置时间滑动条状态
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ui->time_slider->setValue(currentProgress);
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}
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void MainWindow::setVolumeSlider(int currentVolume)
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{
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// 设置音量滑动条状态
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ui->volume_slider->setValue(currentVolume);
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}
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void *getTimerThreadFunc(void *arg)
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{
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MainWindow *p = (MainWindow *)arg;
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while (1)
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{
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// 发送获取的当前时间的命令
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// 发送 get_time_pos 命令到管道中
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write(p->fifo_fd, "get_time_pos\n", strlen("get_time_pos\n"));
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// usleep(500*1000); // 休眠 0.5 秒
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// 发送获取当前歌曲进度的命令
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write(p->fifo_fd,"get_percent_pos\n",strlen("get_percent_pos\n"));
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usleep(500*1000); // 休眠 0.5 秒
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// // 发送获取的当前歌曲元数据信息的命令
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// // 发送获取当前歌曲长度的命令 ANS_LENGTH
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// write(p->fifo_fd, "get_time_length\n", strlen("get_time_length\n"));
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// usleep(125*1000);
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// // 发送获取当前歌曲名的命令 ANS_META_TITLE
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// write(p->fifo_fd, "get_file_name\n", strlen("get_file_name\n"));
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// usleep(125*1000);
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// // 发送获取当前歌曲歌手的命令 ANS_META_ARTIST
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// write(p->fifo_fd, "get_meta_artist\n", strlen("get_meta_artist\n"));
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// usleep(125*1000);
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// // 发送获取当前歌曲专辑的命令 ANS_META_ALBU
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// write(p->fifo_fd, "get_meta_album\n", strlen("get_meta_album\n"));
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// usleep(125*1000);
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}
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}
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void *readPipeMSG(void *arg)
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{
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MainWindow *p = (MainWindow *)arg;
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// 不停的获取无名管道的数据
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while (1)
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{
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char buf[256] = "";
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int ret = read(p->fd[0], buf, sizeof(buf)); // 从无名管道读取内容到 buf
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if(ret > 0)
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{
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// 判断消息的类型 :
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// 如果消息是 "当前歌曲播放时间位置"
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if(strncmp(buf,"ANS_TIME_POSITION",strlen("ANS_TIME_POSITION")) == 0)
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{
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int time = 0;
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sscanf(buf,"ANS_TIME_POSITION=%d",&time); // 从数据流 buf 中读取时间到 time
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// 给 UI 发送当前时间信号
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emit p->currentTimeSignal(time);
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}
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// 如果消息是 "当前歌曲播放进度"
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else if(strncmp(buf,"ANS_PERCENT_POSITION", strlen("ANS_PERCENT_POSITION")) == 0)
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{
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int currentProgress = 0;
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sscanf(buf, "ANS_PERCENT_POSITION=%d", ¤tProgress);
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// 给 UI 发送进度信号
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emit p->currentProgressSignal(currentProgress);
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}
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// // 如果消息是 "当前歌曲元数据信息"
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// else if(strncmp(buf,"ANS_LENGTH", strlen("ANS_LENGTH")) == 0)
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// {
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// int currentProgress = 0;
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// sscanf(buf, "ANS_LENGTH=%d", ¤tProgress);
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// // 给 UI 发送进度信号
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// emit p->currentProgressSignal(currentProgress);
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// }
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}
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}
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}
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void MainWindow::setSongList()
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{
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// 将 vector 内容转存入 QStringList
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QStringList strList;
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for(vector<string>::const_iterator it = vectorSong.begin(); it != vectorSong.end(); ++it)
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{
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strList.append(QString::fromStdString(*it));
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}
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ui->song_list_widget->addItems(strList);
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// ui->song_list_widget->setCurrentRow(2);
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}
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void MainWindow::on_play_btn_clicked()
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{
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if(play_btn_flag == 0)
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{
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ui->play_btn->setIcon(QIcon(":/icon2/pause"));
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kill(mplayer_pid,SIGCONT);
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play_btn_flag = 1;
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}
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else if (play_btn_flag == 1)
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{
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ui->play_btn->setIcon(QIcon(":/icon2/play"));
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kill(mplayer_pid,SIGSTOP);
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play_btn_flag = 0;
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}
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}
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void MainWindow::on_back_btn_clicked()
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{
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playLastSong();
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}
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void MainWindow::on_front_btn_clicked()
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{
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playNextSong(); // 切换下一首歌
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}
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void MainWindow::player_rewind_or_forward(int seconds)
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{
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char changeSongBuf[128] = "";
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int len = sprintf(changeSongBuf, "seek %d\n", seconds); // 快进快退 seconds 秒 (seconds 为正->进，为负->退)
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write(this->fifo_fd, changeSongBuf, len); // 将快进快退指令写入到有名管道中
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}
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void MainWindow::volume_control(int value, int abs)
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{
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char changeSongBuf[128] = "";
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// 音量调整到 value 大小(-数减+数加)， abs 为 0 时在当前音量上加减一个值，abs 不为 0 时将当前音量设置为 value 大小
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int len = sprintf(changeSongBuf, "volume %d %d\n", value, abs);
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write(this->fifo_fd, changeSongBuf, len); // 将音量控制指令写入到有名管道中
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}
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void MainWindow::volume_mute_switch(int mute_arg)
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{
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char changeSongBuf[128] = "";
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int len = sprintf(changeSongBuf, "mute %d\n", mute_arg); // mute_arg 静音开关参数 (1->静音，0->取消静音)
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write(this->fifo_fd, changeSongBuf, len); // 将静音控制指令写入到有名管道中
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}
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void MainWindow::on_last_btn_clicked()
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{
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player_rewind_or_forward(-10); // 快退 10 秒
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}
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void MainWindow::on_next_btn_clicked()
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{
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player_rewind_or_forward(10); // 快退 10 秒
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}
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void MainWindow::on_mute_btn_clicked()
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{
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if(mute_flag == 0) // 没静音则按下后设置静音
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{
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ui->mute_btn->setIcon(QIcon(":/icon2/sound-on"));
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// volume_mute_switch(1);
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// mute_flag = 1;
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volume_mute_switch(++mute_flag);
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}
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else if (mute_flag == 1) // 已静音则按下后取消静音
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{
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ui->mute_btn->setIcon(QIcon(":/icon2/sound-off"));
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volume_mute_switch(--mute_flag);
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}
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}
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void MainWindow::on_volume_down_btn_clicked()
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{
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volume_control(-10, 0); // 减 10 音量
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currentVolume -= 10;
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setVolumeSlider(currentVolume); // 设置音量滑块位置
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}
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void MainWindow::on_volume_up_btn_clicked()
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{
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volume_control(10, 0); // 加 10 音量
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currentVolume += 10;
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// emit this->currentVolumeSignal(currentVolume);
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setVolumeSlider(currentVolume); // 设置音量滑块位置
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}
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