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QT开发技术【ffmpeg + QAudioOutput】音乐播放器完善

java 2025/6/28 4:31:33

一、完善上章的功能，形成一个小工具

QT开发技术【ffmpeg + QAudioOutput】音乐播放器

在这里插入图片描述

二、增加歌曲保存类

#include "../Include/MusicListManager.h"
#include "QtGui/Include/Conversion.h"
#include <QFile>
#include <QXmlStreamReader>
#include <QXmlStreamWriter>
#include <QDebug>CMusicListManager::CMusicListManager()
{}CMusicListManager::~CMusicListManager()
{}bool CMusicListManager::AddMusic(const std::string& strMusicFilePath)
{for (auto& itr : m_vecMusicList){if (itr.strMusicPath == strMusicFilePath){return false;}}stMusicInfo stMusicInfo;stMusicInfo.strMusicName = strMusicFilePath.substr(strMusicFilePath.find_last_of("\\/") + 1).substr(0, strMusicFilePath.find_last_of("."));stMusicInfo.strMusicPath = strMusicFilePath;m_vecMusicList.push_back(stMusicInfo);return true;
}void CMusicListManager::RemoveMusic(const std::string& strMusicFilePath)
{for (auto itr = m_vecMusicList.begin(); itr!= m_vecMusicList.end(); ++itr){if (itr->strMusicPath == strMusicFilePath){m_vecMusicList.erase(itr);return;}}
}stMusicInfo CMusicListManager::GetMusicInfoByIndex(int nIndex) const
{if (nIndex < 0){nIndex = m_vecMusicList.size() - 1;}else if (nIndex >= (int)m_vecMusicList.size()){nIndex = 0;}return m_vecMusicList[nIndex];
}void CMusicListManager::Clear()
{m_vecMusicList.clear();
}std::vector<stMusicInfo> CMusicListManager::GetMusicList() const
{return m_vecMusicList;
}void CMusicListManager::Load(const std::string& strSaveFilePath)
{m_strSaveFilePath = strSaveFilePath;QFile file(TransString2Unicode(strSaveFilePath));if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {qDebug() << TransString2Unicode("无法打开文件:" +strSaveFilePath);return;}m_vecMusicList.clear();QXmlStreamReader xmlReader(&file);while (!xmlReader.atEnd() && !xmlReader.hasError()){QXmlStreamReader::TokenType token = xmlReader.readNext();if (token == QXmlStreamReader::StartElement) {if (xmlReader.name() == "Music"){QXmlStreamAttributes attributes = xmlReader.attributes();if (attributes.hasAttribute("name") && attributes.hasAttribute("path")) {QString name = attributes.value("name").toString();QString path = attributes.value("path").toString();stMusicInfo stMusicInfo;stMusicInfo.strMusicName = TransUnicode2String(name);stMusicInfo.strMusicPath = TransUnicode2String(path);m_vecMusicList.push_back(stMusicInfo);}}}}
}void CMusicListManager::Save()
{QFile file(TransString2Unicode(m_strSaveFilePath));if (!file.open(QIODevice::WriteOnly | QIODevice::Text)){qDebug() <<  TransString2Unicode("无法打开文件进行写入:" + m_strSaveFilePath);return;}QXmlStreamWriter xmlWriter(&file);xmlWriter.setAutoFormatting(true); // 自动格式化 XML 内容xmlWriter.writeStartDocument();xmlWriter.writeStartElement("MusicList");for (auto& itr : m_vecMusicList){xmlWriter.writeStartElement("Music");xmlWriter.writeAttribute("name", TransString2Unicode(itr.strMusicName));xmlWriter.writeAttribute("path", TransString2Unicode(itr.strMusicPath));xmlWriter.writeEndElement(); // 结束 Music 元素}xmlWriter.writeEndElement(); // 结束 MusicList 元素xmlWriter.writeEndDocument();file.close();
}

三、界面一些按钮控制实现

#include "../Include/EMusicMainWindow.h"
#include "ui_EMusicMainWindow.h"
#include "QtGui/Include/Conversion.h"
#include <QFileDialog>
#include <QThread>
#include <QDebug>CEMusicMainWindow::CEMusicMainWindow(QWidget* parent): QMainWindow(parent), ui(std::make_unique<Ui::CEMusicMainWindow>())
{ui->setupUi(this);InitUI();
}CEMusicMainWindow::~CEMusicMainWindow()
{m_AudioPlayer.Stop();m_AudioPlayer.Quit();m_pMusicLocalListManager->Save();
}void CEMusicMainWindow::InitUI()
{m_bIsPlaying = false;m_bSeeking = false;m_eCycleType = E_CYCLE_ALL;m_pMusicLocalListManager = std::make_unique<CMusicListManager>();std::string strMusicListPath = TransUnicode2String(QCoreApplication::applicationDirPath()) + "/MusicList.xml";m_pMusicLocalListManager->Load(strMusicListPath);std::vector<stMusicInfo> vecMusicList = m_pMusicLocalListManager->GetMusicList();for (auto musicInfo : vecMusicList){QListWidgetItem* item = new QListWidgetItem(QIcon(":/Music_File.png"), TransString2Unicode(musicInfo.strMusicName));ui->listWidget_All->addItem(item);}connect(&m_AudioPlayer, &CAudioPlayer::SigDuration, this, &CEMusicMainWindow::SlotUpdateLyricsAndTime);connect(&m_AudioPlayer, &CAudioPlayer::SigSeekOk, this, &CEMusicMainWindow::SlotSeekOk);
}void CEMusicMainWindow::on_pushButton_StopOrPlay_clicked()
{if (m_strMusicFilePath.isEmpty()){return;}if (m_bIsPlaying){m_bIsPlaying = false;m_AudioPlayer.Pause();ui->pushButton_StopOrPlay->setStyleSheet("image: url(:/Play.png);");}else{m_bIsPlaying = true;m_bSeeking = false;ui->pushButton_StopOrPlay->setStyleSheet("image: url(:/Stop.png);");if (m_strOldMusicFilePath.isEmpty()){m_strOldMusicFilePath = m_strMusicFilePath;m_LyricsReader.LoadLrcFile(m_strMusicFilePath.split('.').first() + ".lrc");m_AudioPlayer.Play(TransUnicode2String(m_strMusicFilePath));}else if (m_strMusicFilePath != m_strOldMusicFilePath){m_strOldMusicFilePath = m_strMusicFilePath;m_LyricsReader.LoadLrcFile(m_strMusicFilePath.split('.').first() + ".lrc");m_AudioPlayer.Play(TransUnicode2String(m_strMusicFilePath));}else if(m_AudioPlayer.GetControlType() == CAudioPlayer::E_CONTROL_PAUSE){m_AudioPlayer.Resume();}else {m_strOldMusicFilePath = m_strMusicFilePath;m_AudioPlayer.Play(TransUnicode2String(m_strMusicFilePath));}}
}void CEMusicMainWindow::SlotUpdateLyricsAndTime(int nCurrentTime, int nDestTime)
{std::string strLyrics = m_LyricsReader.GetCurrentLyrics(nCurrentTime);ui->label_Words->setText(TransString2Unicode(strLyrics));if (nCurrentTime == nDestTime && nCurrentTime != 0){if (m_eCycleType == E_CYCLE_SINGLE){m_AudioPlayer.Play(TransUnicode2String(m_strMusicFilePath));}else{on_pushButton_Next_clicked();}}static int currentMs1 = -1, destMs1 = -1;if (currentMs1 == nCurrentTime && destMs1 == nDestTime){return;}currentMs1 = nCurrentTime;destMs1 = nDestTime;//qDebug() << "onDuration:" << nCurrentTime << nDestTime << m_bSeeking;QString currentTime = QString("%1:%2:%3").arg(currentMs1 / 360000 % 60, 2, 10, QChar('0')).arg(currentMs1 / 6000 % 60, 2, 10, QChar('0')).arg(currentMs1 / 1000 % 60, 2, 10, QChar('0'));QString destTime = QString("%1:%2:%3").arg(destMs1 / 360000 % 60, 2, 10, QChar('0')).arg(destMs1 / 6000 % 60, 2, 10, QChar('0')).arg(destMs1 / 1000 % 60, 2, 10, QChar('0'));ui->label_Process->setText(currentTime + "/" + destTime);if (!m_bSeeking) //未滑动{ui->slider_Seek->setMaximum(nDestTime);ui->slider_Seek->setValue(nCurrentTime);} 
}void CEMusicMainWindow::SlotSeekOk()
{m_bSeeking = false;
}void CEMusicMainWindow::on_slider_Seek_sliderPressed()
{m_bSeeking = true;
}void CEMusicMainWindow::on_slider_Seek_sliderReleased()
{m_AudioPlayer.Seek(ui->slider_Seek->value());
}void CEMusicMainWindow::on_listWidget_All_itemDoubleClicked(QListWidgetItem* item)
{int nIndex = ui->listWidget_All->row(item);if (nIndex < 0){return;}stMusicInfo musicInfo = m_pMusicLocalListManager->GetMusicInfoByIndex(nIndex);if (musicInfo.strMusicPath.empty()){return;}m_strMusicFilePath = TransString2Unicode(musicInfo.strMusicPath);m_bIsPlaying = false;on_pushButton_StopOrPlay_clicked();
}void CEMusicMainWindow::on_pushButton_CycleOrSingle_clicked()
{if (m_eCycleType == E_CYCLE_ALL){m_eCycleType = E_CYCLE_SINGLE;ui->pushButton_CycleOrSingle->setStyleSheet("image: url(:/SingleCycle.png);");}else{m_eCycleType = E_CYCLE_ALL;ui->pushButton_CycleOrSingle->setStyleSheet("image: url(:/Cycle.png);");}
}void CEMusicMainWindow::on_pushButton_Prev_clicked()
{int nIndex = ui->listWidget_All->currentRow();if (nIndex < 0){return;}stMusicInfo musicInfo = m_pMusicLocalListManager->GetMusicInfoByIndex(nIndex - 1);if (musicInfo.strMusicPath.empty()){return;}if (nIndex - 1 < 0){ui->listWidget_All->setCurrentRow(ui->listWidget_All->count() - 1);}else{ui->listWidget_All->setCurrentRow(nIndex - 1);}m_strMusicFilePath = TransString2Unicode(musicInfo.strMusicPath);m_bIsPlaying = false;on_pushButton_StopOrPlay_clicked();
}void CEMusicMainWindow::on_pushButton_Next_clicked()
{int nIndex = ui->listWidget_All->currentRow();if (nIndex < 0){return;}stMusicInfo musicInfo = m_pMusicLocalListManager->GetMusicInfoByIndex(nIndex + 1);if (musicInfo.strMusicPath.empty()){return;}if (nIndex + 1 >= ui->listWidget_All->count()){ui->listWidget_All->setCurrentRow(0);}else{ui->listWidget_All->setCurrentRow(nIndex + 1);}m_strMusicFilePath = TransString2Unicode(musicInfo.strMusicPath);m_bIsPlaying = false;on_pushButton_StopOrPlay_clicked();
}void CEMusicMainWindow::on_pushButton_DeleteAll_clicked()
{ui->listWidget_All->clear();m_pMusicLocalListManager->Clear();
}void CEMusicMainWindow::on_pushButton_Select_clicked()
{QDir dir = QFileDialog::getExistingDirectory(this, TransString2Unicode("选择音乐文件夹"), QDir::currentPath());if (dir.exists()){QStringList filters;filters << "*.mp3";QStringList files = dir.entryList(filters, QDir::Files);for (auto file : files){std::string strFilePath = TransUnicode2String(dir.absoluteFilePath(file));if (m_pMusicLocalListManager->AddMusic(strFilePath)){QListWidgetItem* item = new QListWidgetItem(QIcon(":/Music_File.png"), file.split('.').first());ui->listWidget_All->addItem(item);}}}
}