Qt Quick Qml界面录制、播放音频文件，C++实现录制、播放功能

#include "audiorecorder.h" #include "QDebug" #include "qdatastream.h" #include "QTime" #include <QFileInfo> static quint16 targetPort = 12345; static QHostAddress targetAddress("192.168.1.1"); AudioRecorder::AudioRecorder(QObject *parent) : QObject(parent) { readAudioFile.setFileName("output.wav"); thread = new QThread(this); udpSocket = new QUdpSocket(this); // 设置音频格式 format.setSampleRate(8000); // 8000 12000 16000 format.setChannelCount(1); format.setSampleSize(8); // 16 8 format.setCodec("audio/pcm"); format.setByteOrder(QAudioFormat::LittleEndian); format.setSampleType(QAudioFormat::SignedInt); // 检查格式是否被支持 QAudioDeviceInfo info = QAudioDeviceInfo::defaultInputDevice(); if (!info.isFormatSupported(format)) { qWarning() << "Default format not supported - trying to use nearest"; format = info.nearestFormat(format); } audioFile = new QFile("output.wav"); timer = new QTimer(this); // 每秒更新一次时间和数据大小 connect(timer, &QTimer::timeout, this, [&]() { m_recordTime += 1000; emit recordTimeChanged(); emit dataSizeChanged(); }); sendTimer = new QTimer(this); connect(sendTimer, &QTimer::timeout, this, [&]() { m_recordTime++; _sendData.append(m_recordTime); qDebug() << "_sendData:" << _sendData; sendData(); //thread->start(); }); //sendTimer->start(1000); } AudioRecorder::~AudioRecorder() { if (audioInput) delete audioInput; if (audioFile) delete audioFile; } void AudioRecorder::startRecording() { audioInput = new QAudioInput(format, this); if(!audioFile->open(QIODevice::WriteOnly | QIODevice::Truncate)) { qDebug() << "Open failed"; } audioInput->start(audioFile); // 连接信号槽来监控数据 QObject::connect(audioInput, &QAudioInput::notify, [&]() { m_dataSize = audioFile->size(); qDebug() << "Record data" << m_dataSize << "byte"; }); // 设置通知间隔 audioInput->setNotifyInterval(1000); // 每秒更新一次 emit recordingStarted(); } void AudioRecorder::stopRecording() { if (audioInput) { audioInput->stop(); audioFile->seek(0); writeWavHeader(); QFileInfo fileInfo(*audioFile); QString fullPath = fileInfo.absoluteFilePath(); qDebug() << "Finish record, size:" << audioFile->size() << fullPath; setFilePath(fullPath); audioFile->close(); delete audioInput; audioInput = nullptr; emit recordingStopped(); } } void AudioRecorder::play() { mediaPlayer = new QMediaPlayer; connect(mediaPlayer, SIGNAL(positionChanged(qint64)), this, SLOT(positionChanged(qint64))); // 连接信号和槽以处理媒体状态变化 QObject::connect(mediaPlayer, &QMediaPlayer::mediaStatusChanged, [=](QMediaPlayer::MediaStatus status) { if (status == QMediaPlayer::LoadedMedia) { qint64 duration = mediaPlayer->duration(); // 获取时长（毫秒） qDebug() << "Duration:" << duration << "ms"; } }); // 连接 durationChanged 信号 QObject::connect(mediaPlayer, &QMediaPlayer::durationChanged, [=](qint64 duration) { if (duration > 0) { qDebug() << "Duration:" << duration << "ms"; } }); // 连接 stateChanged 信号 QObject::connect(mediaPlayer, &QMediaPlayer::stateChanged, [=](QMediaPlayer::State state) { if (state == QMediaPlayer::StoppedState) { // 播放完成，执行清理 qDebug() << "delete"; mediaPlayer->deleteLater(); // 安全删除对象 } }); mediaPlayer->setVolume(50); // 设置音量 mediaPlayer->setMedia(QUrl::fromLocalFile("output.wav")); mediaPlayer->play(); } void AudioRecorder::writeWavHeader() { // WAV 文件的头部信息 audioFile->seek(0); QDataStream out(audioFile); out.setByteOrder(QDataStream::LittleEndian); // RIFF 头部 out.writeRawData("RIFF", 4); out << quint32(audioFile->size() - 8); // 文件大小减去 RIFF 头部和文件大小字段 out.writeRawData("WAVE", 4); // fmt 子块 out.writeRawData("fmt ", 4); out << quint32(16); // PCM 的 fmt 子块的大小 out << quint16(1); // PCM 格式 out << quint16(format.channelCount()); out << quint32(format.sampleRate()); out << quint32(format.sampleRate() * format.channelCount() * format.sampleSize() / 8); out << quint16(format.channelCount() * format.sampleSize() / 8); out << quint16(format.sampleSize()); // data 子块 out.writeRawData("data", 4); out << quint32(audioFile->size() - 44); // 音频数据的大小 } void AudioRecorder::sendData_UDP() { if (!readAudioFile.open(QIODevice::ReadOnly)) { qDebug() << "Open file error"; return; } const int bufferSize = 32; QByteArray buffer(bufferSize, 0); static int sendCounts = 0; static int sendByteAll = 0; while (!readAudioFile.atEnd()) { int bytesRead = readAudioFile.read(buffer.data(), bufferSize); sendByteAll += bytesRead; qDebug() << "Send " << sendByteAll << QTime::currentTime().toString("hh:mm:ss:zzz"); if (bytesRead > 0) { udpSocket->writeDatagram(buffer, targetAddress, targetPort); } sendCounts++; QThread::msleep(20); } readAudioFile.close(); qDebug() << "sendCounts:" << sendCounts; } void AudioRecorder::sendData() { udpSocket->writeDatagram(_sendData, targetAddress, targetPort); } void AudioRecorder::positionChanged(qint64 pos) { qDebug() << "pos:" << pos; } const QString &AudioRecorder::filePath() const { return m_filePath; } void AudioRecorder::setFilePath(const QString &newFilePath) { if (m_filePath == newFilePath) return; m_filePath = newFilePath; emit filePathChanged(); }