\nQAudioInput::start(QIODevice *device)\u6307\u5b9a\u4e00\u4e2aQIODevice\u8bbe\u5907\u4f5c\u4e3a\u6570\u636e\u8f93\u51fa\u5bf9\u8c61，\u53ef\u4ee5\u662f\u6587\u4ef6，\u4e5f\u53ef\u4ee5\u662f\u5176\u4ed6\u4eceQIODevice\u7ee7\u627f\u7684\u7c7b\u3002\u5982\u4eceQIODevice\u7ee7\u627f\u4e00\u4e2a\u7c7b，\u5bf9\u8f93\u5165\u7684\u7f13\u51b2\u533a\u6570\u636e\u8fdb\u884c\u5904\u7406，\u800c\u4e0d\u662f\u4fdd\u5b58\u5230\u6587\u4ef6\u3002\u800cQAudioRecorder\u53ea\u80fd\u6307\u5b9a\u6587\u4ef6\u4f5c\u4e3a\u4fdd\u5b58\u5bf9\u8c61\u3002\u6240\u4ee5，QAudioInput\u53ef\u4ee5\u5b9e\u73b0\u66f4\u52a0\u5e95\u5c42\u7684\u97f3\u9891\u8f93\u5165\u63a7\u5236\u3002<\/p>\n<\/li>\n<\/ul>\n
\u539f\u4e66\u7684\u56fe15-4\u662f\u4f7f\u7528QAudioInput\u5b9e\u73b0\u7684\u4e00\u4e2a\u97f3\u9891\u6570\u636e\u8f93\u5165\u5e76\u5b9e\u65f6\u663e\u793a\u539f\u59cb\u4fe1\u53f7\u6ce2\u5f62\u7684\u5b9e\u4f8b\u7a0b\u5e8fsamp15_4\u7684\u8fd0\u884c\u754c\u9762\u3002<\/p>\n
\u56fe15-4\u5de6\u4fa7\u663e\u793a\u7684\u662f\u7528QAudioDeviceInfo\u7c7b\u83b7\u53d6\u7684\u97f3\u9891\u8bbe\u5907，\u4ee5\u53ca\u8bbe\u5907\u652f\u6301\u7684\u5404\u79cd\u53c2\u6570，\u5355\u51fb\u201c\u6d4b\u8bd5\u97f3\u9891\u8bbe\u7f6e\u201d\u53ef\u4ee5\u5224\u65ad\u97f3\u9891\u8bbe\u5907\u662f\u5426\u652f\u6301\u6240\u8bbe\u7f6e\u7684\u91c7\u96c6\u914d\u7f6e\u3002\u4e3a\u4e86\u66f4\u65b9\u4fbf\u8bfb\u53d6\u539f\u59cb\u6570\u636e，\u5728\u5f00\u59cb\u91c7\u96c6\u65f6\u91c7\u7528\u56fa\u5b9a\u7684\u8bbe\u7f6e，\u53738000Hz\u30011\u901a\u9053\u30018\u4f4d\u3001\u65e0\u7b26\u53f7\u6574\u6570\u3002<\/p>\n
\u7a97\u53e3\u53f3\u4fa7\u662f\u4e00\u4e2aQChart\u7ec4\u4ef6，\u91c7\u7528QLineSeries\u4f5c\u4e3a\u663e\u793a\u5e8f\u5217\u3002\u5f00\u59cb\u91c7\u96c6\u540e，\u4ece\u7f13\u51b2\u533a\u8bfb\u53d6\u7684\u6570\u636e\u5c06\u5b9e\u65f6\u663e\u793a\u5728\u56fe\u8868\u4e0a\u3002<\/p>\n
2．\u4e3b\u7a97\u53e3\u5b9a\u4e49\u4e0e\u521d\u59cb\u5316<\/h5>\n
samp15_4\u7684\u4e3b\u7a97\u53e3\u662f\u57fa\u4e8eQMainWindow\u7684\u7c7bMainWindow，\u7a97\u53e3\u754c\u9762\u8bbe\u8ba1\u7531UI\u8bbe\u8ba1\u5668\u5b9e\u73b0\u3002\u4e3b\u7a97\u53e3\u7c7bMainWindow\u7684\u5b9a\u4e49\u5982\u4e0b：<\/p>\n
class MainWindow : public QMainWindow
\n{
\n Q_OBJECT
\nprivate:
\n const qint64 displayPointsCount=4000;
\n QLineSeries *lineSeries;\/\/\u66f2\u7ebf\u5e8f\u5217
\n QList<QAudioDeviceInfo> deviceList; \/\/\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u5217\u8868
\n QAudioDeviceInfo curDevice;\/\/\u5f53\u524d\u8f93\u5165\u8bbe\u5907
\n QmyDisplayDevice *displayDevice; \/\/\u7528\u4e8e\u663e\u793a\u7684IODevice
\n QAudioInput *audioInput;\/\/\u97f3\u9891\u8f93\u5165\u8bbe\u5907
\n QString SampleTypeString(QAudioFormat::SampleType sampleType);
\n QString ByteOrderString(QAudioFormat::Endian endian);
\npublic:
\n explicit MainWindow(QWidget *parent = 0);
\n ~MainWindow();
\nprivate slots:
\n\/\/\u81ea\u5b9a\u4e49\u69fd\u51fd\u6570
\n void on_IODevice_UpdateBlockSize(qint64 blockSize);
\nprivate:
\n Ui::MainWindow *ui;
\n};<\/p>\n
\u8fd9\u91cc\u5b9a\u4e49\u4e86\u8f83\u591a\u7684\u79c1\u6709\u53d8\u91cf，\u5176\u4e2dQmyDisplayDevice\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u4eceQIODevice\u7ee7\u627f\u7684\u7c7b，\u7528\u4e8e\u8bfb\u53d6\u97f3\u9891\u8f93\u5165\u7f13\u51b2\u533a\u7684\u6570\u636e，\u5e76\u5728\u56fe\u8868\u4e0a\u663e\u793a\u3002\u5176\u5177\u4f53\u5b9e\u73b0\u5728\u540e\u9762\u4ecb\u7ecd\u3002<\/p>\n
MainWindow\u7684\u6784\u9020\u51fd\u6570\u4ee3\u7801\u5982\u4e0b：<\/p>\n
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
\n ui(new Ui::MainWindow)
\n{
\n ui->setupUi(this);
\n setCentralWidget(ui->splitter);
\n\/\/\u521b\u5efa\u663e\u793a\u56fe\u8868
\n QChart *chart = new QChart;
\n chart->setTitle("\u97f3\u9891\u8f93\u5165\u539f\u59cb\u4fe1\u53f7");
\n ui->chartView->setChart(chart);
\n lineSeries= new QLineSeries(); \/\/\u5e8f\u5217
\n chart->addSeries(lineSeries);<\/p>\n
QValueAxis *axisX = new QValueAxis; \/\/\u5750\u6807\u8f74
\n axisX->setRange(0, displayPointsCount); \/\/chart\u663e\u793a4000\u4e2a\u91c7\u6837\u70b9\u6570\u636e
\n axisX->setLabelFormat("%g");
\n axisX->setTitleText("Samples");
\n QValueAxis *axisY = new QValueAxis; \/\/\u5750\u6807\u8f74
\n axisY->setRange(0, 256); \/\/ UnSingedInt\u91c7\u6837，\u6570\u636e\u8303\u56f40-255
\n axisY->setTitleText("Audio level");<\/p>\n
chart->setAxisX(axisX, lineSeries);
\n chart->setAxisY(axisY, lineSeries);
\n chart->legend()->hide();<\/p>\n
ui->comboDevices->clear();
\n deviceList=QAudioDeviceInfo::availableDevices(QAudio::AudioInput);
\n for(int i=0;i<deviceList.count();i++)
\n {
\n QAudioDeviceInfo device=deviceList.at(i);
\n ui->comboDevices->addItem(device.deviceName());
\n }<\/p>\n
if (deviceList.size()>0)
\n {
\n ui->comboDevices->setCurrentIndex(0);
\n curDevice =deviceList.at(0);\/\/
\n }
\n else
\n {
\n ui->actStart->setEnabled(false);
\n ui->actDeviceTest->setEnabled(false);
\n ui->groupBoxDevice->setTitle("\u652f\u6301\u7684\u97f3\u9891\u8f93\u5165\u8bbe\u7f6e(\u65e0\u8bbe\u5907)");
\n }
\n}<\/p>\n
\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e86\u7528\u4e8e\u56fe\u8868\u663e\u793a\u7684QChart\u5bf9\u8c61chart，\u521b\u5efa\u4e86QLineSeries\u7c7b\u578b\u7684\u5e8f\u5217lineSeries，\u521b\u5efa\u4e86X\u548cY\u5750\u6807\u8f74；\u5176X\u8f74\u7684\u8303\u56f4\u7b49\u4e8e0\u5230\u663e\u793a\u7684\u6570\u636e\u70b9\u7684\u603b\u65704000，Y\u8f74\u7684\u8303\u56f4\u662f0\u81f3256，\u91c7\u75288\u4f4d\u65e0\u7b26\u53f7\u6574\u6570，\u91c7\u6837\u6570\u636e\u8303\u56f4\u662f0\u81f3255\u3002<\/p>\n
QAudioDeviceInfo::availableDevices(QAudio::AudioInput)\u53ef\u4ee5\u83b7\u53d6\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u5217\u8868，\u8bbe\u5907\u540d\u79f0\u88ab\u6dfb\u52a0\u5230\u7a97\u53e3\u4e0a\u7684comboDevices\u4e0b\u62c9\u5217\u8868\u6846\u91cc\u3002<\/p>\n
3．\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u652f\u6301\u7684\u683c\u5f0f<\/h5>\n
\u5728\u4e3b\u7a97\u53e3\u7684\u6784\u9020\u51fd\u6570\u4e2d，\u5411comboDevices\u4e0b\u62c9\u5217\u8868\u6846\u4e2d\u6dfb\u52a0\u4e86\u7cfb\u7edf\u6240\u6709\u7684\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u3002\u5728\u4e0b\u62c9\u5217\u8868\u6846\u91cc\u9009\u62e9\u4e00\u4e2a\u8bbe\u5907\u65f6，\u53d1\u5c04currentIndexChanged(int index)\u4fe1\u53f7，\u5728\u5176\u69fd\u51fd\u6570\u91cc\u83b7\u53d6\u8bbe\u5907\u652f\u6301\u7684\u5404\u79cd\u97f3\u9891\u8f93\u5165\u53c2\u6570，\u5305\u62ec\u652f\u6301\u7684\u97f3\u9891\u7f16\u7801\u3001\u91c7\u6837\u7387\u3001\u901a\u9053\u6570\u3001\u91c7\u6837\u70b9\u7c7b\u578b\u548c\u91c7\u6837\u70b9\u5927\u5c0f\u7b49，\u4ee5\u6b64\u66f4\u65b0\u7a97\u53e3\u4e0a\u7684\u7ec4\u4ef6\u663e\u793a\u3002<\/p>\n
void MainWindow::on_comboDevices_currentIndexChanged(int index)
\n{\/\/\u9009\u62e9\u97f3\u9891\u8f93\u5165\u8bbe\u5907
\n curDevice =deviceList.at(index);\/\/\u5f53\u524d\u97f3\u9891\u8bbe\u5907
\n ui->comboCodec->clear(); \/\/\u652f\u6301\u7684\u97f3\u9891\u7f16\u7801
\n QStringList codecs = curDevice.supportedCodecs();
\n for (int i = 0; i < codecs.size(); ++i)
\n ui->comboCodec->addItem(codecs.at(i));<\/p>\n
ui->comboSampleRate->clear(); \/\/\u652f\u6301\u7684\u91c7\u6837\u7387
\n QList<int> sampleRate = curDevice.supportedSampleRates();
\n for (int i = 0; i < sampleRate.size(); ++i)
\n ui->comboSampleRate->addItem(QString("%1").arg(sampleRate.at(i)));<\/p>\n
ui->comboChannels->clear();\/\/\u652f\u6301\u7684\u901a\u9053\u6570
\n QList<int> Channels = curDevice.supportedChannelCounts();
\n for (int i = 0; i < Channels.size(); ++i)
\n ui->comboChannels->addItem(QString("%1").arg(Channels.at(i)));<\/p>\n
ui->comboSampleTypes->clear(); \/\/\u652f\u6301\u7684\u91c7\u6837\u70b9\u7c7b\u578b
\n QList<QAudioFormat::SampleType> sampleTypes = curDevice.supportedSampleTypes();
\n for (int i = 0; i < sampleTypes.size(); ++i)
\n ui->comboSampleTypes->addItem(SampleTypeString(sampleTypes.at(i)), QVariant(sampleTypes.at(i)));<\/p>\n
ui->comboSampleSizes->clear();\/\/\u91c7\u6837\u70b9\u5927\u5c0f
\n QList<int> sampleSizes = curDevice.supportedSampleSizes();
\n for (int i = 0; i < sampleSizes.size(); ++i)
\n ui->comboSampleSizes->addItem(QString("%1").arg(sampleSizes.at(i)));<\/p>\n
ui->comboByteOrder->clear();\/\/\u5b57\u8282\u5e8f
\n QList<QAudioFormat::Endian> endians = curDevice.supportedByteOrders();
\n for (int i = 0; i < endians.size(); ++i)
\n ui->comboByteOrder->addItem(ByteOrderString(endians.at(i)));
\n}<\/p>\n
QString MainWindow::SampleTypeString(QAudioFormat::SampleType sampleType)
\n{\/\/\u5c06QAudioFormat::SampleType\u7c7b\u578b\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32
\n QString result("Unknown");
\n switch (sampleType) {
\n case QAudioFormat::SignedInt:
\n result = "SignedInt"; break;
\n case QAudioFormat::UnSignedInt:
\n result = "UnSignedInt"; break;
\n case QAudioFormat::Float:
\n result = "Float"; break;
\n case QAudioFormat::Unknown:
\n result = "Unknown";
\n }
\n return result;
\n}<\/p>\n
QString MainWindow::ByteOrderString(QAudioFormat::Endian endian)
\n{ \/\/\u5c06QAudioFormat::Endian \u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32
\n if (endian==QAudioFormat::LittleEndian)
\n return "LittleEndian";
\n else if (endian==QAudioFormat::BigEndian)
\n return "BigEndian";
\n else
\n return "Unknown";
\n}<\/p>\n
\u521b\u5efa\u4e00\u4e2aQAudioInput\u5bf9\u8c61\u65f6\u9700\u8981\u4f20\u9012\u4e00\u4e2aQAudioFormat\u7c7b\u578b\u4f5c\u4e3a\u53c2\u6570，\u7528\u4e8e\u6307\u5b9a\u97f3\u9891\u8f93\u5165\u914d\u7f6e，\u800c\u97f3\u9891\u8bbe\u5907\u662f\u5426\u652f\u6301\u8fd9\u4e9b\u914d\u7f6e\u9700\u8981\u8fdb\u884c\u6d4b\u8bd5\u3002\u7a97\u53e3\u4e0a\u7684\u201c\u6d4b\u8bd5\u97f3\u9891\u8bbe\u7f6e\u201d\u6309\u94ae\u53ef\u4ee5\u8fdb\u884c\u6d4b\u8bd5，\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_actDeviceTest_triggered()
\n{\/\/\u6d4b\u8bd5\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u662f\u5426\u652f\u6301\u9009\u62e9\u7684\u8bbe\u7f6e
\n QAudioFormat settings;
\n settings.setCodec(ui->comboCodec->currentText());
\n settings.setSampleRate(ui->comboSampleRate->currentText().toInt());
\n settings.setChannelCount(ui->comboChannels->currentText().toInt());
\n settings.setSampleType(QAudioFormat::SampleType(
\n ui->comboSampleTypes->currentData().toInt()));
\n settings.setSampleSize(ui->comboSampleSizes->currentText().toInt());
\n if (ui->comboByteOrder->currentText()=="LittleEndian")
\n settings.setByteOrder(QAudioFormat::LittleEndian);
\n else
\n settings.setByteOrder(QAudioFormat::BigEndian);<\/p>\n
if (curDevice.isFormatSupported(settings))
\n QMessageBox::information(this,"\u97f3\u9891\u6d4b\u8bd5","\u6d4b\u8bd5\u6210\u529f，\u8f93\u5165\u8bbe\u5907\u652f\u6301\u6b64\u8bbe\u7f6e");
\n else
\n QMessageBox::critical(this,"\u97f3\u9891\u6d4b\u8bd5","\u6d4b\u8bd5\u5931\u8d25，\u8f93\u5165\u8bbe\u5907\u4e0d\u652f\u6301\u6b64\u8bbe\u7f6e");
\n}<\/p>\n
QAudioFormat\u7c7b\u5bf9\u8c61settings\u4ece\u754c\u9762\u4e0a\u5404\u4e2a\u7ec4\u4ef6\u83b7\u53d6\u8bbe\u7f6e，\u5305\u62ec\u7f16\u7801\u683c\u5f0f\u3001\u91c7\u6837\u7387\u3001\u901a\u9053\u6570\u7b49，\u7136\u540e\u7528QAudioDeviceInfo::isFormatSupported()\u51fd\u6570\u6d4b\u8bd5\u662f\u5426\u652f\u6301\u6b64\u8bbe\u7f6e；\u5982\u679c\u4e0d\u652f\u6301，\u8fd8\u53ef\u4ee5\u4f7f\u7528QAudioDeviceInfo\u7684nearestFormat()\u51fd\u6570\u83b7\u53d6\u6700\u63a5\u8fd1\u7684\u914d\u7f6e\u3002<\/p>\n
4．\u5f00\u59cb\u97f3\u9891\u8f93\u5165<\/h5>\n
\u5355\u51fb\u7a97\u53e3\u5de5\u5177\u680f\u4e0a\u201c\u5f00\u59cb\u201d\u6309\u94ae，\u5373\u53ef\u5f00\u59cb\u97f3\u9891\u6570\u636e\u8f93\u5165，\u5176\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_actStart_triggered()
\n{\/\/\u5f00\u59cb\u97f3\u9891\u8f93\u5165
\n QAudioFormat defaultAudioFormat; \/\/\u7f3a\u7701\u683c\u5f0f
\n defaultAudioFormat.setSampleRate(8000);
\n defaultAudioFormat.setChannelCount(1);
\n defaultAudioFormat.setSampleSize(8);
\n defaultAudioFormat.setCodec("audio\/pcm");
\n defaultAudioFormat.setByteOrder(QAudioFormat::LittleEndian);
\n defaultAudioFormat.setSampleType(QAudioFormat::UnSignedInt);
\n if (!curDevice.isFormatSupported(defaultAudioFormat))
\n {
\n QMessageBox::critical(this,"\u6d4b\u8bd5","\u6d4b\u8bd5\u5931\u8d25，\u8f93\u5165\u8bbe\u5907\u4e0d\u652f\u6301\u6b64\u8bbe\u7f6e");
\n return;
\n }<\/p>\n
audioInput = new QAudioInput(curDevice,defaultAudioFormat, this);
\n audioInput->setBufferSize(displayPointsCount);
\n\/\/ \u63a5\u6536\u97f3\u9891\u8f93\u5165\u6570\u636e\u7684\u6d41\u8bbe\u5907
\n displayDevice = new QmyDisplayDevice(lineSeries, displayPointsCount,this);
\n connect(displayDevice,SIGNAL(updateBlockSize(qint64)),
\n this,SLOT(on_IODevice_UpdateBlockSize(qint64)));
\n displayDevice->open(QIODevice::WriteOnly); <\/p>\n
audioInput->start(displayDevice);
\n ui->actStart->setEnabled(false);
\n ui->actStop->setEnabled(true);
\n}<\/p>\n
\u4e3a\u4e86\u4fbf\u4e8e\u89e3\u6790\u97f3\u9891\u8f93\u5165\u7684\u539f\u59cb\u6570\u636e，\u97f3\u9891\u8f93\u5165\u7684\u914d\u7f6e\u91c7\u7528\u56fa\u5b9a\u7684\u7b80\u5355\u65b9\u5f0f，\u800c\u4e0d\u662f\u6839\u636e\u754c\u9762\u4e0a\u7684\u8bbe\u7f6e\u8fdb\u884c\u914d\u7f6e\u3002\u97f3\u9891\u8f93\u5165\u914d\u7f6e\u56fa\u5b9a\u4e3a8000 Hz\u91c7\u6837\u7387\u30011\u4e2a\u901a\u9053\u30018\u4f4d\u65e0\u7b26\u53f7\u6574\u6570\u3001audio\/pcm\u7f16\u7801\u548c\u5c0f\u7aef\u5b57\u8282\u5e8f\u3002<\/p>\n
\u521b\u5efaQAudioInput\u7c7b\u5bf9\u8c61audioInput\u65f6，\u4f20\u9012defaultAudioFormat\u548ccurDevice\u4f5c\u4e3a\u53c2\u6570，\u5e76\u8bbe\u7f6e\u7f13\u51b2\u533a\u5927\u5c0f\u4e3adisplayPointsCount（\u7b49\u4e8e4000）\u3002<\/p>\n
audioInput = new QAudioInput(curDevice,defaultAudioFormat, this);
\naudioInput->setBufferSize(displayPointsCount);<\/p>\n
\u4f7f\u7528setBufferSize\u8bbe\u7f6e\u7684\u7f13\u51b2\u533a，\u9700\u8981\u5728\u8c03\u7528start()\u4e4b\u524d\u8bbe\u7f6e\u624d\u6709\u6548\u3002\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u5927\u4e8e\u6bcf\u6b21\u66f4\u65b0\u8f93\u5165\u7684\u539f\u59cb\u6570\u636e\u5757\u7684\u5927\u5c0f，\u5728\u539f\u4e66\u7684\u56fe15-4\u4e2d\u53ef\u89c1\u7f13\u51b2\u533a\u5927\u5c0f\u4e3a4000，\u800c\u6bcf\u6b21\u66f4\u65b0\u7684\u539f\u59cb\u6570\u636e\u7684\u6570\u636e\u5b57\u8282\u6570\u4e3a800\u3002<\/p>\n
\u968f\u540e\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2aQmyDisplayDevice\u7c7b\u578b\u7684IO\u8bbe\u5907displayDevice，\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u6d41\u8bbe\u5907\u7684writeData()\u51fd\u6570，\u7528\u4e8e\u8bfb\u53d6\u97f3\u9891\u8f93\u5165\u7684\u6570\u636e\u5e76\u5728\u66f2\u7ebf\u4e0a\u663e\u793a\u3002\u5176\u6784\u9020\u51fd\u6570\u63a5\u6536lineSeries\u548cdisplayPointsCount\u4f5c\u4e3a\u53c2\u6570\u3002\u518d\u5c06displayDevice\u7684\u4fe1\u53f7updateBlockSize()\u4e0e\u4e00\u4e2a\u81ea\u5b9a\u4e49\u69fd\u51fd\u6570\u5173\u8054，\u7136\u540e\u5c06displayDevice\u4ee5\u53ea\u5199\u65b9\u5f0f\u6253\u5f00\u3002<\/p>\n
\u6700\u540e\u8c03\u7528QAudioInput::start()\u51fd\u6570\u5f00\u59cb\u97f3\u9891\u8f93\u5165，\u4ee5displayDevice\u4f5c\u4e3aIO\u6d41\u8bbe\u5907\u3002<\/p>\n
audioInput->start(displayDevice);<\/p>\n
\u81ea\u5b9a\u4e49\u69fd\u51fd\u6570on_IODevice_UpdateBlockSize()\u7528\u4e8e\u663e\u793a\u7f13\u51b2\u533a\u5927\u5c0f\u548c\u6570\u636e\u5757\u5927\u5c0f，\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_IODevice_UpdateBlockSize(qint64 blockSize)
\n{\/\/\u663e\u793a\u7f13\u51b2\u533a\u5927\u5c0f\u548c\u6570\u636e\u5757\u5927\u5c0f
\n ui->LabBufferSize->setText(QString::asprintf(
\n "QAudioInput::bufferSize()=%d",audioInput->bufferSize()));
\n ui->LabBlockSize->setText(
\n QString("IODevice\u6570\u636e\u5757\u5b57\u8282\u6570=%1").arg(blockSize));
\n}<\/p>\n
5．\u6d41\u8bbe\u5907QmyDisplayDevice\u7684\u529f\u80fd\u5b9e\u73b0<\/h5>\n
\u4f7f\u7528QAudioInput\u83b7\u53d6\u97f3\u9891\u8f93\u5165\u6570\u636e\u65f6，\u9700\u8981\u4f7f\u7528\u4e00\u4e2aQIODevice\u7c7b\u578b\u7684\u8bbe\u5907\u4f5c\u4e3a\u6d41\u8f93\u51fa\u8bbe\u5907，\u4e00\u822c\u91c7\u7528QFile\u53ef\u4ee5\u5c06\u6570\u636e\u8bb0\u5f55\u5230\u6587\u4ef6\u3002\u672c\u4f8b\u4e2d\u4f7f\u7528\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u7c7bQmyDisplayDevice，\u7528\u4e8e\u83b7\u53d6\u97f3\u9891\u8f93\u5165\u6570\u636e\u5e76\u5728\u66f2\u7ebf\u4e0a\u5b9e\u65f6\u663e\u793a\u3002<\/p>\n
QmyDisplayDevice\u7c7b\u7684\u5b9a\u4e49\u5982\u4e0b：<\/p>\n
#include <QtCharts>
\n#include <QIODevice>
\nclass QmyDisplayDevice : public QIODevice
\n{
\n Q_OBJECT
\npublic:
\n explicit QmyDisplayDevice(QXYSeries * series, qint64 pointsCount,QObject *parent = 0);
\nprotected:
\n qint64 readData(char * data, qint64 maxSize);
\n qint64 writeData(const char * data, qint64 maxSize);
\nprivate:
\n QXYSeries *m_series;
\n qint64 range=4000;
\nsignals:
\n void updateBlockSize(qint64 blockSize);
\n};<\/p>\n
\u56e0\u4e3aQmyDisplayDevice\u7c7b\u4eceQIODevice\u7ee7\u627f，\u6240\u4ee5\u5177\u6709\u6d41\u6570\u636e\u8bfb\u5199\u529f\u80fd\u3002\u91cd\u65b0\u5b9e\u73b0\u7684readData()\u548cwriteData()\u662f\u5b9e\u73b0\u6d41\u6570\u636e\u8bfb\u5199\u529f\u80fd\u7684\u3002<\/p>\n
\u5b9a\u4e49\u4e86m_series\u548crange\u4e24\u4e2a\u79c1\u6709\u53d8\u91cf\u3002m_series\u662f\u7528\u4e8e\u56fe\u8868\u66f2\u7ebf\u663e\u793a\u7684QXYSeries\u5e8f\u5217，range\u7f3a\u7701\u503c\u4e3a4000，\u662f\u5e8f\u5217\u6700\u591a\u663e\u793a\u7684\u6570\u636e\u70b9\u6570\u3002\u6784\u9020\u51fd\u6570\u91cc\u63a5\u6536series\u548cpointsCount\u5bf9\u4e0a\u8ff0\u4e24\u4e2a\u53d8\u91cf\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
QmyDisplayDevice\u7c7b\u7684\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b：<\/p>\n
QmyDisplayDevice::QmyDisplayDevice(QXYSeries * series, qint64 pointsCount, QObject *parent) : QIODevice(parent)
\n{\/\/ \u6784\u9020\u51fd\u6570
\n m_series= series;
\n range=pointsCount;
\n}<\/p>\n
qint64 QmyDisplayDevice::readData(char * data, qint64 maxSize)
\n{\/\/ \u6d41\u7684\u8bfb\u64cd\u4f5c,\u4e0d\u5904\u7406
\n Q_UNUSED(data)
\n Q_UNUSED(maxSize)
\n return -1;
\n}
\nqint64 QmyDisplayDevice::writeData(const char * data, qint64 maxSize)
\n{ \/\/\u8bfb\u53d6\u6570\u636e\u5757\u5185\u7684\u6570\u636e，\u66f4\u65b0\u5230\u5e8f\u5217
\n QVector<QPointF> oldPoints = m_series->pointsVector();
\n QVector<QPointF> points; \/\/\u4e34\u65f6
\n if (oldPoints.count() < range)
\n { \/\/m_series\u5e8f\u5217\u7684\u6570\u636e\u672a\u6ee14000\u70b9，
\n points = m_series->pointsVector();
\n }
\n else
\n {\/\/\u5c06\u539f\u6765maxSize\u81f34000\u7684\u6570\u636e\u70b9\u524d\u79fb
\n for (int i = maxSize; i < oldPoints.count(); i++)
\n points.append(QPointF(i – maxSize, oldPoints.at(i).y()));
\n }<\/p>\n
qint64 size = points.count();
\n for (int k = 0; k < maxSize; k++) \/\/\u6570\u636e\u5757\u5185\u7684\u6570\u636e\u586b\u5145\u5e8f\u5217\u7684\u5c3e\u90e8
\n points.append(QPointF(k + size, (quint8)data[k]));<\/p>\n
m_series->replace(points);
\n emit updateBlockSize(maxSize);
\n return maxSize;
\n}<\/p>\n
QmyDisplayDevice\u65e0\u9700\u5b9e\u73b0\u6d41\u7684\u8bfb\u64cd\u4f5c，\u6240\u4ee5readData()\u51fd\u6570\u4e0d\u505a\u4ec0\u4e48\u5904\u7406，\u91cd\u70b9\u662f\u6d41\u7684\u5199\u64cd\u4f5cwriteData()\u51fd\u6570\u7684\u5b9e\u73b0\u3002<\/p>\n
writeData()\u4f20\u9012\u8fdb\u6765\u7684\u53c2\u6570data\u662f\u6570\u636e\u5757\u7684\u6307\u9488，maxSize\u662f\u6570\u636e\u5757\u7684\u5b57\u8282\u6570，\u8fd9\u662f\u9700\u8981\u8bfb\u53d6\u51fa\u6765\u7684\u97f3\u9891\u8f93\u5165\u6570\u636e\u3002<\/p>\n
\u7531\u4e8e\u97f3\u9891\u8f93\u5165\u914d\u7f6e\u4e3a1\u901a\u90538\u4f4d\u65e0\u7b26\u53f7\u7684\u6574\u6570\u91c7\u6837，\u6240\u4ee5\u4e00\u4e2a\u6570\u636e\u70b9\u5c31\u662f\u4e00\u4e2a\u5b57\u8282\u7684\u6570\u636e\u3002<\/p>\n
\u663e\u793a\u5e8f\u5217m_series\u5b58\u50a8\u7684\u663e\u793a\u6570\u636e\u70b9\u4e2a\u6570\u9650\u5b9a\u4e3a4000\u4e2a\u70b9，\u5927\u4e8emaxSize（\u6b64\u4f8b\u4e2d\u4e3a800），\u6240\u4ee5\u5bf9\u4e8e\u5e8f\u5217\u7684\u6570\u636e\u70b9\u7684\u66f4\u65b0\u91c7\u7528FIFO（\u5148\u5165\u5148\u51fa）\u7684\u65b9\u5f0f\u3002<\/p>\n
\u66f4\u65b0\u4e34\u65f6\u6570\u636e\u70b9\u5411\u91cfpoints，\u91c7\u7528\u5e8f\u5217\u7684replace()\u51fd\u6570\u66ff\u6362\u5e8f\u5217\u539f\u6709\u7684\u6570\u636e\u70b9\u5411\u91cf，\u662f\u6700\u5feb\u7684\u65b9\u5f0f\u3002<\/p>\n
writeData()\u51fd\u6570\u6700\u540e\u53d1\u5c04\u4fe1\u53f7updateBlockSize(maxSize)，\u7528\u4e8e\u4e3b\u7a97\u53e3\u7684\u5173\u8054\u69fd\u51fd\u6570on_IODevice_UpdateBlockSize()\u5219\u663e\u793a\u6570\u636e\u5757\u7684\u5927\u5c0f\u3002<\/p>\n
15.4\u3000\u89c6\u9891\u64ad\u653e<\/h3>\n
\u4f7f\u7528QMediaPlayer\u53ef\u4ee5\u8fdb\u884c\u89c6\u9891\u6587\u4ef6\u89e3\u7801，\u89c6\u9891\u64ad\u653e\u5fc5\u987b\u5c06\u89c6\u9891\u5e27\u5728\u67d0\u4e2a\u754c\u9762\u7ec4\u4ef6\u4e0a\u663e\u793a，\u6709QVideoWidget\u548cQGraphicsVideoItem\u4e24\u79cd\u89c6\u9891\u663e\u793a\u7ec4\u4ef6，\u4e5f\u53ef\u4ee5\u4ece\u8fd9\u4e24\u4e2a\u7c7b\u7ee7\u627f，\u81ea\u5b9a\u4e49\u89c6\u9891\u663e\u793a\u7ec4\u4ef6\u3002<\/p>\n
QMediaPlayer\u4e5f\u53ef\u4ee5\u7ed3\u5408QMediaPlaylist\u5b9e\u73b0\u89c6\u9891\u6587\u4ef6\u5217\u8868\u64ad\u653e\u3002<\/p>\n
15.4.1\u3000\u5728QVideoWidget\u4e0a\u64ad\u653e\u89c6\u9891<\/h4>\n1．\u89c6\u9891\u64ad\u653e\u5668\u5b9e\u4f8b\u7a0b\u5e8f<\/h5>\n
QVideoWidget\u662f\u7528\u4e8e\u663e\u793a\u89c6\u9891\u7684\u754c\u9762\u7ec4\u4ef6，\u8981\u5728\u9879\u76ee\u4e2d\u4f7f\u7528QVideoWidget，\u9700\u8981\u5728\u9879\u76ee\u914d\u7f6e\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4e0b\u9762\u4e00\u884c\u8bed\u53e5：<\/p>\n
****Qt += multimediawidgets<\/p>\n
\u4f7f\u7528QMediaPlayer\u548cQVideoWidget\u5b9e\u73b0\u7684\u4e00\u4e2a\u89c6\u9891\u64ad\u653e\u5668\u5b9e\u4f8b\u7a0b\u5e8fsamp15_5\u8fd0\u884c\u65f6\u754c\u9762\u5982\u539f\u4e66\u7684\u56fe15-5\u6240\u793a\u3002\u8be5\u7a0b\u5e8f\u6ca1\u6709\u4f7f\u7528QMediaPlaylist，\u53ea\u64ad\u653e\u5355\u4e2a\u6587\u4ef6\u3002<\/p>\n
\u754c\u9762\u7684\u4e3b\u4f53\u90e8\u5206\u662f\u4e00\u4e2aQmyVideoWidget\u7c7b\u7ec4\u4ef6，\u662f\u4eceQVideoWidget\u7ee7\u627f\u7684\u81ea\u5b9a\u4e49\u89c6\u9891\u663e\u793a\u7ec4\u4ef6，\u91cd\u8f7d\u4e86mousePressEvent()\u4e8b\u4ef6，\u9f20\u6807\u5355\u51fb\u53ef\u4ee5\u6682\u505c\u6216\u7ee7\u7eed\u64ad\u653e；\u91cd\u8f7d\u4e86keyPressEvent()\u4e8b\u4ef6，\u5728\u5168\u5c4f\u72b6\u6001\u4e0b\u6309ESC\u952e\u53ef\u4ee5\u9000\u51fa\u5168\u5c4f\u3002\u539f\u59cb\u7684QVideoWidget\u7c7b\u6ca1\u6709\u8fd9\u4e9b\u529f\u80fd\u3002<\/p>\n
2．\u4e3b\u7a97\u53e3\u8bbe\u8ba1<\/h5>\n
\u4e3b\u7a97\u53e3\u662f\u57fa\u4e8eQMainWindow\u7684\u7c7bMainWindow，\u91c7\u7528UI\u8bbe\u8ba1\u5668\u8bbe\u8ba1\u754c\u9762\u3002\u5728\u8bbe\u8ba1\u89c6\u9891\u663e\u793a\u7ec4\u4ef6\u65f6，\u5728\u7a97\u4f53\u4e0a\u653e\u7f6e\u4e00\u4e2aQWidget\u7ec4\u4ef6，\u7136\u540e\u63d0\u5347\u4e3aQmyVideoWidget\u7c7b\u3002<\/p>\n
\u4e3b\u7a97\u53e3\u529f\u80fd\u4e3b\u8981\u662f\u4f7f\u7528\u4e00\u4e2aQMediaPlayer\u7ec4\u4ef6\u64ad\u653e\u5355\u4e2a\u89c6\u9891\u6587\u4ef6\u3002\u5a92\u4f53\u64ad\u653e\u7c7bQMediaPlayer\u7684\u529f\u80fd\u572815.2\u8282\u4ecb\u7ecd\u97f3\u9891\u64ad\u653e\u65f6\u5df2\u7ecf\u8be6\u7ec6\u4ecb\u7ecd\u3002<\/p>\n
MainWindow\u7c7b\u5b9a\u4e49\u5982\u4e0b（\u5ffd\u7565\u4e86\u81ea\u52a8\u751f\u6210\u7684\u754c\u9762\u7ec4\u4ef6\u7684\u69fd\u51fd\u6570\u5b9a\u4e49）：<\/p>\n
class MainWindow : public QMainWindow
\n{
\n Q_OBJECT
\nprivate:
\n QMediaPlayer *player;\/\/\u89c6\u9891\u64ad\u653e\u5668
\n QString durationTime;
\n QString positionTime;
\npublic:
\n explicit MainWindow(QWidget *parent = 0);
\n ~MainWindow();
\nprivate slots:
\n\/\/\u81ea\u5b9a\u4e49\u69fd\u51fd\u6570
\n void onStateChanged(QMediaPlayer::State state);
\n void onDurationChanged(qint64 duration);
\n void onPositionChanged(qint64 position);
\nprivate:
\n Ui::MainWindow *ui;
\n};<\/p>\n
MainWindow\u7c7b\u7684\u529f\u80fd\u5b9e\u73b0\u4ee3\u7801\u5982\u4e0b，\u53ea\u64ad\u653e\u5355\u4e2a\u6587\u4ef6，\u6bd415.2\u8282\u7684\u97f3\u9891\u64ad\u653e\u5668\u529f\u80fd\u7b80\u5355，\u6240\u4ee5\u5177\u4f53\u4ee3\u7801\u7684\u529f\u80fd\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
\n ui(new Ui::MainWindow)
\n{\/\/\u6784\u9020\u51fd\u6570
\n ui->setupUi(this);
\n player = new QMediaPlayer(this);\/\/\u521b\u5efa\u89c6\u9891\u64ad\u653e\u5668
\n player->setNotifyInterval(2000);\/\/\u4fe1\u606f\u66f4\u65b0\u5468\u671f2000 ms
\n player->setVideoOutput(ui->videoWidget);\/\/\u89c6\u9891\u663e\u793a\u7ec4\u4ef6
\n ui->videoWidget->setMediaPlayer(player);\/\/\u8bbe\u7f6e\u663e\u793a\u7ec4\u4ef6\u7684\u5173\u8054\u64ad\u653e\u5668
\n connect(player,SIGNAL(stateChanged(QMediaPlayer::State)),
\n this, SLOT(onStateChanged(QMediaPlayer::State)));
\n connect(player,SIGNAL(positionChanged(qint64)),
\n this, SLOT(onPositionChanged(qint64)));
\n connect(player,SIGNAL(durationChanged(qint64)),
\n this, SLOT(onDurationChanged(qint64)));
\n}
\nvoid MainWindow::onStateChanged(QMediaPlayer::State state)
\n{\/\/\u64ad\u653e\u5668\u72b6\u6001\u53d8\u5316
\n ui->btnPlay->setEnabled(!(state==QMediaPlayer::PlayingState));
\n ui->btnPause->setEnabled(state==QMediaPlayer::PlayingState);
\n ui->btnStop->setEnabled(state==QMediaPlayer::PlayingState);
\n}
\nvoid MainWindow::onDurationChanged(qint64 duration)
\n{\/\/\u6587\u4ef6\u65f6\u957f\u53d8\u5316
\n ui->sliderPosition->setMaximum(duration);
\n int secs=duration\/1000;\/\/\u79d2
\n int mins=secs\/60; \/\/\u5206\u949f
\n secs=secs % 60;\/\/\u4f59\u6570\u79d2
\n durationTime=QString::asprintf("%d:%d",mins,secs);
\n ui->LabRatio->setText(positionTime+"\/"+durationTime);
\n}
\nvoid MainWindow::onPositionChanged(qint64 position)
\n{\/\/\u6587\u4ef6\u64ad\u653e\u4f4d\u7f6e\u53d8\u5316
\n if (ui->sliderPosition->isSliderDown())
\n return; \/\/\u5982\u679c\u6b63\u5728\u62d6\u52a8\u6ed1\u6761，\u9000\u51fa
\n ui->sliderPosition->setSliderPosition(position);
\n int secs=position\/1000;\/\/\u79d2
\n int mins=secs\/60; \/\/\u5206\u949f
\n secs=secs % 60;\/\/\u4f59\u6570\u79d2
\n positionTime=QString::asprintf("%d:%d",mins,secs);
\n ui->LabRatio->setText(positionTime+"\/"+durationTime);
\n}
\nvoid MainWindow::on_btnAdd_clicked()
\n{\/\/\u6253\u5f00\u6587\u4ef6
\n QString curPath=QDir::homePath();\/\/\u83b7\u53d6\u7cfb\u7edf\u5f53\u524d\u76ee\u5f55
\n QString dlgTitle="\u9009\u62e9\u89c6\u9891\u6587\u4ef6"; \/\/\u5bf9\u8bdd\u6846\u6807\u9898
\n QString filter="wmv\u6587\u4ef6(*.wmv);;mp4\u6587\u4ef6(*.mp4);;\u6240\u6709\u6587\u4ef6(*.*)";
\n QString aFile=QFileDialog::getOpenFileName(this, dlgTitle, curPath, filter);
\n if (aFile.isEmpty())
\n return;
\n QFileInfo fileInfo(aFile);
\n ui->LabCurMedia->setText(fileInfo.fileName());
\n player->setMedia(QUrl::fromLocalFile(aFile));\/\/\u8bbe\u7f6e\u64ad\u653e\u6587\u4ef6
\n player->play();
\n}
\nvoid MainWindow::on_btnPlay_clicked()
\n{\/\/\u64ad\u653e
\n player->play();
\n}
\nvoid MainWindow::on_btnPause_clicked()
\n{\/\/\u6682\u505c
\n player->pause();
\n}
\nvoid MainWindow::on_btnStop_clicked()
\n{\/\/\u505c\u6b62
\n player->stop();
\n}
\nvoid MainWindow::on_sliderVolumn_valueChanged(int value)
\n{\/\/\u8c03\u8282\u97f3\u91cf
\n player->setVolume(value);
\n}
\nvoid MainWindow::on_btnSound_clicked()
\n{\/\/\u9759\u97f3\u6309\u94ae
\n bool mute=player->isMuted();
\n player->setMuted(!mute);
\n if (mute)
\n ui->btnSound->setIcon(QIcon(":\/images\/images\/volumn.bmp"));
\n else
\n ui->btnSound->setIcon(QIcon(":\/images\/images\/mute.bmp"));
\n}
\nvoid MainWindow::on_sliderPosition_valueChanged(int value)
\n{\/\/\u64ad\u653e\u4f4d\u7f6e
\n player->setPosition(value);
\n}
\nvoid MainWindow::on_pushButton_clicked()
\n{\/\/\u5168\u5c4f\u6309\u94ae
\n ui->videoWidget->setFullScreen(true);
\n}<\/p>\n
3．\u81ea\u5b9a\u4e49\u89c6\u9891\u663e\u793a\u7ec4\u4ef6QmyVideoWidget<\/h5>\n
\u539f\u59cb\u7684QVideoWidget\u5728\u5168\u5c4f\u540e\u65e0\u6cd5\u6309Esc\u952e\u9000\u51fa\u5168\u5c4f\u72b6\u6001，\u4e3a\u4e86\u5b9e\u73b0\u6309\u952e\u548c\u9f20\u6807\u63a7\u5236\u529f\u80fd，\u4eceQVideoWidget\u7ee7\u627f\u4e86\u4e00\u4e2a\u7c7bQmyVideoWidget，\u5176\u5b9a\u4e49\u5982\u4e0b：<\/p>\n
class QmyVideoWidget : public QVideoWidget
\n{
\nprivate:
\n QMediaPlayer *thePlayer;
\nprotected:
\n void keyPressEvent(QKeyEvent *event);
\n void mousePressEvent(QMouseEvent *event);
\npublic:
\n QmyVideoWidget(QWidget *parent = Q_NULLPTR);
\n void setMediaPlayer(QMediaPlayer *player);
\n};<\/p>\n
\u79c1\u6709\u53d8\u91cfthePlayer\u662f\u5173\u8054\u7684\u89c6\u9891\u64ad\u653e\u5668，\u5728\u5f00\u59cb\u64ad\u653e\u4e4b\u524d\u7531\u4e3b\u7a97\u53e3\u7a0b\u5e8f\u8c03\u7528setMediaPlayer()\u8fdb\u884c\u8bbe\u7f6e，\u4ee5\u4fbf\u5728QmyVideoWidget\u91cc\u5bf9\u64ad\u653e\u5668\u8fdb\u884c\u63a7\u5236\u3002<\/p>\n
\u4e0b\u9762\u662fQmyVideoWidget\u7c7b\u7684\u5b9e\u73b0\u4ee3\u7801：<\/p>\n
void QmyVideoWidget::keyPressEvent(QKeyEvent *event)
\n{\/\/\u6309\u952e\u4e8b\u4ef6，ESC\u9000\u51fa\u5168\u5c4f\u72b6\u6001
\n if ((event->key() == Qt::Key_Escape)&&(isFullScreen()))
\n {
\n setFullScreen(false);
\n event->accept();
\n QVideoWidget::keyPressEvent(event);
\n }
\n}
\nvoid QmyVideoWidget::mousePressEvent(QMouseEvent *event)
\n{\/\/\u9f20\u6807\u4e8b\u4ef6，\u5355\u51fb\u63a7\u5236\u6682\u505c\u548c\u7ee7\u7eed\u64ad\u653e
\n if (event->button()==Qt::LeftButton)
\n {
\n if (thePlayer->state()==QMediaPlayer::PlayingState)
\n thePlayer->pause();
\n else
\n thePlayer->play();
\n }
\n QVideoWidget::mousePressEvent(event);
\n}
\nvoid QmyVideoWidget::setMediaPlayer(QMediaPlayer *player)
\n{\/\/\u8bbe\u7f6e\u64ad\u653e\u5668
\n thePlayer=player;
\n}<\/p>\n
15.4.2\u3000\u5728QGraphicsVideoItem\u4e0a\u64ad\u653e\u89c6\u9891<\/h4>\n
QMediaPlayer\u89e3\u7801\u7684\u89c6\u9891\u8fd8\u53ef\u4ee5\u5728QGraphicsVideoItem\u7c7b\u7ec4\u4ef6\u4e0a\u663e\u793a\u3002QGraphicsVideoItem\u662f\u7ee7\u627f\u81eaQGraphicsItem\u7684\u7c7b，\u662f\u9002\u7528\u4e8eGraphics\/View\u6a21\u5f0f\u7684\u56fe\u5f62\u663e\u793a\u7ec4\u4ef6\u3002\u6240\u4ee5\u5728\u4f7f\u7528QGraphicsVideoItem\u663e\u793a\u89c6\u9891\u65f6，\u53ef\u4ee5\u5728\u663e\u793a\u573a\u666f\u4e2d\u548c\u5176\u4ed6\u56fe\u5f62\u7ec4\u4ef6\u7ec4\u5408\u663e\u793a，\u4e5f\u53ef\u4ee5\u4f7f\u7528QGraphicsItem\u7c7b\u7684\u653e\u5927\u3001\u7f29\u5c0f\u3001\u62d6\u52a8\u3001\u65cb\u8f6c\u7b49\u529f\u80fd\u3002<\/p>\n
\u539f\u4e66\u7684\u56fe15-6\u6240\u793a\u662f\u4f7f\u7528QMediaPlayer\u548cQGraphicsVideoItem\u64ad\u653e\u89c6\u9891\u7684\u793a\u4f8b\u7a0b\u5e8fsamp15_6\u8fd0\u884c\u65f6\u754c\u9762\u3002\u7a97\u53e3\u4e3b\u4f53\u90e8\u5206\u662f\u4e00\u4e2aQGraphicsView\u7ec4\u4ef6，\u5728\u8fd9\u4e2a\u56fe\u5f62\u89c6\u56fe\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2aQGraphicsVideoItem\u5bf9\u8c61\u7528\u4e8e\u663e\u793a\u64ad\u653e\u7684\u89c6\u9891，\u8fd8\u521b\u5efa\u4e86\u4e24\u4e2a\u56fe\u5f62\u7ec4\u4ef6，\u8fd9\u4e9b\u7ec4\u4ef6\u90fd\u53ef\u4ee5\u62d6\u52a8\u3002<\/p>\n
\u4e3b\u7a97\u53e3\u6784\u9020\u51fd\u6570\u7684\u90e8\u5206\u4ee3\u7801\u5982\u4e0b：<\/p>\n
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
\n ui(new Ui::MainWindow)
\n{
\n ui->setupUi(this);
\n player = new QMediaPlayer(this);
\n player->setNotifyInterval(2000);
\n QGraphicsScene *scene = new QGraphicsScene(this);
\n ui->graphicsView->setScene(scene);<\/p>\n
videoItem = new QGraphicsVideoItem;
\n videoItem->setSize(QSizeF(360, 240));
\n videoItem->setFlags(QGraphicsItem::ItemIsMovable
\n | QGraphicsItem::ItemIsSelectable
\n | QGraphicsItem::ItemIsFocusable);
\n scene->addItem(videoItem);
\n player->setVideoOutput(videoItem);\/\/\u8bbe\u7f6e\u89c6\u9891\u663e\u793a\u56fe\u5f62\u7ec4\u4ef6<\/p>\n
connect(player,SIGNAL(stateChanged(QMediaPlayer::State)),
\n this, SLOT(onStateChanged(QMediaPlayer::State)));
\n connect(player,SIGNAL(positionChanged(qint64)),
\n this, SLOT(onPositionChanged(qint64)));
\n connect(player,SIGNAL(durationChanged(qint64)),
\n this, SLOT(onDurationChanged(qint64)));
\n}<\/p>\n
\u4ee3\u7801\u521b\u5efaQGraphicsVideoItem\u7c7b\u578b\u53d8\u91cfvideoItem，\u5e76\u4e14\u8bbe\u7f6e\u5176\u4e3a\u53ef\u79fb\u52a8\u3001\u53ef\u9009\u62e9\u3001\u53ef\u4ee5\u83b7\u5f97\u7126\u70b9\u3002\u8bbe\u7f6e\u89c6\u9891\u64ad\u653e\u5668player\u89c6\u9891\u8f93\u51fa\u5230videoItem\u4e0a\u663e\u793a\u3002<\/p>\n
\u539f\u4e66\u7684\u56fe15-6\u4e2d\u7a0b\u5e8f\u5176\u4ed6\u529f\u80fd\u7684\u5b9e\u73b0\u4e0e\u5b9e\u4f8bsamp15_5，\u8fd9\u91cc\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n
15.5\u3000\u6444\u50cf\u5934\u7684\u4f7f\u7528<\/h3>\n15.5.1\u3000\u6444\u50cf\u5934\u63a7\u5236\u6982\u8ff0<\/h4>\n
Qt\u591a\u5a92\u4f53\u6a21\u5757\u4e3a\u6444\u50cf\u5934\u63a7\u5236\u63d0\u4f9b\u4e86\u51e0\u4e2a\u7c7b，\u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6\u6444\u50cf\u5934\u8bbe\u5907\u4fe1\u606f，\u901a\u8fc7\u6444\u50cf\u5934\u8fdb\u884c\u62cd\u7167\u548c\u5f55\u50cf\u3002<\/p>\n
（1）\u6444\u50cf\u5934\u8bbe\u5907\u4fe1\u606f\u7c7bQCameraInfo\u3002<\/p>\n
QCameraInfo\u7528\u4e8e\u83b7\u53d6\u7cfb\u7edf\u7684\u6444\u50cf\u5934\u8bbe\u5907\u4fe1\u606f，\u6709\u4e24\u4e2a\u9759\u6001\u51fd\u6570\u83b7\u53d6\u6444\u50cf\u5934\u8bbe\u5907：<\/p>\n
\n- \n
QList\u3000availableCameras()，\u8fd4\u56deQCameraInfo\u7c7b\u7684\u5217\u8868，\u8868\u793a\u7cfb\u7edf\u53ef\u7528\u7684\u6444\u50cf\u5934\u8bbe\u5907\u5217\u8868；<\/p>\n<\/li>\n
- \n
QCameraInfo\u3000defaultCamera()，\u8fd4\u56de\u7cfb\u7edf\u7f3a\u7701\u7684\u6444\u50cf\u5934\u8bbe\u5907\u4fe1\u606f\u3002<\/p>\n<\/li>\n<\/ul>\n
QCameraInfo\u6709\u51e0\u4e2a\u51fd\u6570\u8868\u793a\u6444\u50cf\u5934\u4fe1\u606f：<\/p>\n
\n- \n
QString\u3000description()，\u8fd4\u56de\u6444\u50cf\u5934\u8bbe\u5907\u63cf\u8ff0；<\/p>\n<\/li>\n
- \n
QString\u3000deviceName()，\u8fd4\u56de\u6444\u50cf\u5934\u8bbe\u5907\u540d\u79f0；<\/p>\n<\/li>\n
- \n
QCamera::Position\u3000position()，\u8fd4\u56de\u6444\u50cf\u5934\u7684\u4f4d\u7f6e，\u5982\u624b\u673a\u8bbe\u5907\u4e0a\u4e00\u822c\u6709\u4e24\u4e2a\u6444\u50cf\u5934，\u524d\u7f6e\u6444\u50cf\u5934\u4f4d\u7f6e\u7c7b\u578b\u4e3aQCamera::FrontFace，\u540e\u7f6e\u6444\u50cf\u5934\u4f4d\u7f6e\u7c7b\u578b\u4e3aQCamera::BackFace，\u672a\u6307\u5b9a\u4f4d\u7f6e\u7684\u662fQCamera::UnspecifiedPosition\u3002<\/p>\n<\/li>\n<\/ul>\n
（2）\u6444\u50cf\u5934\u63a7\u5236\u7c7bQCamera\u3002<\/p>\n
QCamera\u662f\u7528\u4e8e\u63a7\u5236\u6444\u50cf\u5934\u7684\u7c7b，\u521b\u5efaQCamera\u5bf9\u8c61\u65f6\u9700\u4f20\u9012\u4e00\u4e2aQCameraInfo\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570，QCamera\u4e3b\u8981\u7684\u529f\u80fd\u51fd\u6570\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u3002<\/p>\n
\n- \n
setViewfinder()，\u4e3a\u6444\u50cf\u5934\u6307\u5b9a\u4e00\u4e2aQVideoWidget\u6216QGraphicsVideoItem\u5bf9\u8c61\u4f5c\u4e3a\u53d6\u666f\u5668，\u7528\u4e8e\u6444\u50cf\u5934\u56fe\u50cf\u9884\u89c8\u3002<\/p>\n<\/li>\n
- \n
QCameraExposure\u3000*exposure()，\u8fd4\u56de\u7528\u4e8e\u66dd\u5149\u63a7\u5236\u7684\u5bf9\u8c61\u3002<\/p>\n<\/li>\n
- \n
QCameraFocus\u3000*focus()，\u8fd4\u56de\u7528\u4e8e\u805a\u7126\u63a7\u5236\u7684\u5bf9\u8c61\u3002<\/p>\n<\/li>\n
- \n
setCaptureMode(QCamera::CaptureModes mode)，\u7528\u4e8e\u8bbe\u7f6e\u6444\u50cf\u5934\u5904\u4e8e\u4e0d\u540c\u7684\u5de5\u4f5c\u6a21\u5f0f，QCamera::CaptureModes\u679a\u4e3e\u7c7b\u578b\u7684\u53d6\u503c\u6709：<\/p>\n<\/li>\n<\/ul>\n
QCamera::CaptureViewfinder，\u53d6\u666f\u5668\u6a21\u5f0f；<\/p>\n
QCamera::CaptureStillImage，\u6293\u53d6\u9759\u6001\u56fe\u7247\u6a21\u5f0f；<\/p>\n
QCamera::CaptureVideo，\u89c6\u9891\u5f55\u5236\u6a21\u5f0f\u3002<\/p>\n
\n- bool isCaptureModeSupported(CaptureModes mode)，\u5224\u65ad\u6444\u50cf\u5934\u662f\u5426\u652f\u6301\u67d0\u79cd\u6293\u53d6\u6a21\u5f0f\u3002<\/li>\n<\/ul>\n
（3）\u9759\u6001\u56fe\u7247\u6293\u53d6\u7c7bQCameraImageCapture\u3002<\/p>\n
QCameraImageCapture\u7528\u4e8e\u63a7\u5236\u6444\u50cf\u5934\u8fdb\u884c\u9759\u6001\u56fe\u7247\u7684\u6293\u53d6\u3002<\/p>\n
（4）\u89c6\u9891\u548c\u97f3\u9891\u5f55\u5236\u7c7bQMediaRecorder\u3002<\/p>\n
QMediaRecorder\u901a\u8fc7\u6444\u50cf\u5934\u548c\u97f3\u9891\u8f93\u5165\u8bbe\u5907\u8fdb\u884c\u5f55\u50cf\u3002<\/p>\n
\u6ce8\u610f：\u4f7f\u7528Qt\u591a\u5a92\u4f53\u6a21\u5757\u7684\u6444\u50cf\u5934\u76f8\u5173\u7c7b\u65e0\u6cd5\u5728Windows\u5e73\u53f0\u4e0a\u8fdb\u884c\u89c6\u9891\u5f55\u5236，\u53ea\u80fd\u8fdb\u884c\u9759\u6001\u56fe\u7247\u6293\u53d6，\u4f46\u662f\u5728Linux\u5e73\u53f0\u4e0a\u53ef\u4ee5\u5b9e\u73b0\u9759\u6001\u56fe\u7247\u6293\u53d6\u548c\u89c6\u9891\u5f55\u5236\u3002\u6240\u4ee5，\u672c\u8282\u7684\u5b9e\u4f8b\u7a0b\u5e8f\u5728Linux\u5e73\u53f0（64\u4f4d\u7248\u672c\u7684Ubuntu 16.04）\u4e0a\u6d4b\u8bd5\u3002<\/p>\n
Qt\u591a\u5a92\u4f53\u6a21\u5757\u7684\u529f\u80fd\u5b9e\u73b0\u662f\u4f9d\u8d56\u4e8e\u5e73\u53f0\u7684\u3002\u5728Windows\u5e73\u53f0\u4e0a，Qt\u591a\u5a92\u4f53\u6a21\u5757\u4f9d\u8d56\u4e8e\u4e24\u4e2a\u63d2\u4ef6，\u4e00\u4e2a\u662f\u4f7f\u7528Microsoft DirectShow API\u7684\u63d2\u4ef6，DirectShow API\u5728Windows 98\u5f15\u5165，\u5728Windows XP\u4ee5\u540e\u5c31\u9010\u6e10\u8fc7\u65f6\u4e86；\u53e6\u4e00\u4e2a\u662fWindows Media Foundation（WMF）\u67b6\u6784\u7684\u63d2\u4ef6，WMF\u63d2\u4ef6\u5728Windows Vista\u5f15\u5165，\u7528\u4e8e\u66ff\u4ee3DirectShow API\u3002<\/p>\n
Qt\u4e2d\u7684WMF\u63d2\u4ef6\u76ee\u524d\u65e0\u6cd5\u63d0\u4f9b\u6444\u50cf\u5934\u652f\u6301，\u5bf9\u6444\u50cf\u5934\u7684\u6709\u9650\u652f\u6301\u662f\u7531DirectShow\u63d2\u4ef6\u63d0\u4f9b\u7684，\u76ee\u524d\u53ea\u80fd\u663e\u793a\u53d6\u666f\u5668\u548c\u6293\u53d6\u9759\u6001\u56fe\u7247，\u5176\u4ed6\u5927\u90e8\u5206\u529f\u80fd\u4e0d\u652f\u6301\u3002\u6240\u4ee5，\u76ee\u524d\u5728Windows\u5e73\u53f0\u4e0a，Qt\u7684\u6444\u50cf\u5934\u63a7\u5236\u4e0d\u652f\u6301\u89c6\u9891\u5f55\u5236\u529f\u80fd，\u4e5f\u4e0d\u652f\u6301\u5e95\u5c42\u7684\u89c6\u9891\u529f\u80fd，\u5982\u4f7f\u7528QVideoProbe\u76d1\u6d4b\u89c6\u9891\u5e27\u3002<\/p>\n
\u5bf9\u4e8e\u8fd9\u4e9b\u9650\u5236\u7684\u539f\u6587\u4ecb\u7ecd\u53ef\u4ee5\u53c2\u8003Qt\u5b98\u7f51\u4e0a\u201cQt Multimedia on Windows\u201d\u7684\u89e3\u91ca\u3002<\/p>\n
\u6240\u4ee5，\u672c\u8282\u7684\u5b9e\u4f8b\u7a0b\u5e8fsamp15_7\u572864\u4f4d\u7248\u672c\u7684Ubuntu 16.04\u684c\u9762\u7cfb\u7edf\u4e0a\u6d4b\u8bd5，Ubuntu\u7cfb\u7edf\u8fd0\u884c\u4e8eVirtualBox\u865a\u62df\u673a\u4e0a\u3002\u539f\u4e66\u7684\u56fe15-7\u6240\u793a\u662f\u7a0b\u5e8f\u8fd0\u884c\u65f6\u754c\u9762\u3002<\/p>\n
\u5de5\u5177\u680f\u4e0a\u51e0\u4e2a\u6309\u94ae\u7684\u529f\u80fd\u4e00\u76ee\u4e86\u7136，\u201c\u6444\u50cf\u5934\u53c2\u6570\u201d\u91cc\u663e\u793a\u6444\u50cf\u5934\u7684\u53c2\u6570，\u4ee5\u53ca\u5f55\u5236\u89c6\u9891\u7684\u4e00\u4e9b\u8bbe\u7f6e\u3002\u7a97\u53e3\u5de5\u4f5c\u533a\u5de6\u4fa7\u7684\u201c\u6444\u50cf\u5934\u9884\u89c8\u201d\u6846\u91cc\u663e\u793a\u6444\u50cf\u5934\u7684\u5b9e\u65f6\u56fe\u50cf\u9884\u89c8，\u53f3\u4fa7\u201c\u6293\u53d6\u56fe\u7247\u201d\u6846\u91cc\u663e\u793a\u6293\u53d6\u7684\u9759\u6001\u56fe\u7247\u3002<\/p>\n
15.5.2\u3000\u5b9e\u4f8b\u4e3b\u7a97\u53e3\u8bbe\u8ba1\u4e0e\u521d\u59cb\u5316<\/h4>\n
\u5b9e\u4f8bsamp15_7\u7684\u4e3b\u7a97\u53e3\u662f\u57fa\u4e8eQMainWindow\u7684\u7c7bMainWindow，\u754c\u9762\u7531UI\u8bbe\u8ba1\u5668\u8bbe\u8ba1\u3002\u5728\u7a97\u53e3\u5de6\u4fa7\u201c\u6444\u50cf\u5934\u9884\u89c8\u201d\u6846\u91cc\u653e\u7f6e\u4e00\u4e2aQWidget\u7ec4\u4ef6，\u5e76\u63d0\u5347\u4e3aQCameraViewfinder，\u8fd9\u662f\u4eceQVideoWidget\u7ee7\u627f\u7684\u7c7b，\u4e13\u95e8\u7528\u4e8e\u6444\u50cf\u5934\u9884\u89c8\u663e\u793a\u3002\u5728\u7a97\u53e3\u53f3\u4fa7\u201c\u6293\u53d6\u56fe\u7247\u201d\u6846\u91cc\u653e\u7f6e\u4e00\u4e2aQLabel\u7ec4\u4ef6，\u7528\u4e8e\u663e\u793a\u6293\u53d6\u7684\u56fe\u7247\u3002<\/p>\n
\u7a97\u53e3\u7684\u5de5\u5177\u680f\u6309\u94ae\u7531Action\u751f\u6210，\u8bbe\u8ba1\u7684Action\u5217\u8868\u5982\u539f\u4e66\u7684\u56fe15-8\u6240\u793a\u3002<\/p>\n
\u4e3b\u7a97\u53e3\u7c7bMainWindow\u7684\u5b9a\u4e49\u5982\u4e0b（\u7701\u7565\u4e86\u81ea\u52a8\u751f\u6210\u7684\u754c\u9762\u7ec4\u4ef6\u7684\u69fd\u51fd\u6570\u5b9a\u4e49）：<\/p>\n
class MainWindow : public QMainWindow
\n{
\n Q_OBJECT
\nprivate:
\n QCamera *curCamera=Q_NULLPTR;
\n QCameraImageCapture *imageCapture; \/\/\u6293\u56fe
\n QMediaRecorder * mediaRecorder;\/\/\u5f55\u50cf
\n QLabel *LabCameraState;
\n QLabel *LabInfo;
\n QLabel *LabCameraMode;
\n void iniCamera();\/\/\u521d\u59cb\u5316
\n void iniImageCapture();\/\/\u521d\u59cb\u5316\u9759\u6001\u6293\u56fe
\n void iniVideoRecorder();\/\/\u521d\u59cb\u5316\u89c6\u9891\u5f55\u5236
\npublic:
\n explicit MainWindow(QWidget *parent = 0);
\n ~MainWindow();
\nprivate slots:
\n\/\/QCamera\u7684\u69fd\u51fd\u6570
\n void on_cameraStateChanged(QCamera::State state);
\n void on_cameraCaptureModeChanged(QCamera::CaptureModes mode);
\n\/\/QCameraImageCapture\u7684\u69fd\u51fd\u6570
\n void on_imageReadyForCapture(bool ready);
\n void on_imageCaptured(int id, const QImage &preview);
\n void on_imageSaved(int id, const QString &fileName);
\n\/\/ QMediaRecorder\u7684\u69fd\u51fd\u6570
\n void on_videoStateChanged(QMediaRecorder::State state);
\n void on_videoDurationChanged(qint64 duration);
\nprivate:
\n Ui::MainWindow *ui;
\n};<\/p>\n
\u8fd9\u91cc\u5b9a\u4e49\u4e86QCamera\u3001QCameraImageCapture\u548cQmediaRecorder 3\u4e2a\u7c7b\u578b\u7684\u79c1\u6709\u53d8\u91cf\u3002\u5b9a\u4e49\u4e863\u4e2a\u79c1\u6709\u51fd\u6570，\u5206\u522b\u7528\u4e8e3\u4e2a\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u521d\u59cb\u5316\u3002<\/p>\n
\u5b9a\u4e49\u4e86\u591a\u4e2a\u69fd\u51fd\u6570，\u5206\u522b\u4e0e3\u4e2a\u5bf9\u8c61\u7684\u76f8\u5e94\u4fe1\u53f7\u5173\u8054\u3002<\/p>\n
\u4e0b\u9762\u662fMainWindow\u7684\u6784\u9020\u51fd\u6570\u7684\u4ee3\u7801：<\/p>\n
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
\n ui(new Ui::MainWindow)
\n{
\n ui->setupUi(this);
\n LabCameraState=new QLabel("\u6444\u50cf\u5934state: ");
\n LabCameraState->setMinimumWidth(150);
\n ui->statusBar->addWidget(LabCameraState);
\n LabCameraMode=new QLabel("\u6293\u53d6\u6a21\u5f0f: ");
\n LabCameraMode->setMinimumWidth(150);
\n ui->statusBar->addWidget(LabCameraMode);
\n LabInfo=new QLabel("");
\n ui->statusBar->addPermanentWidget(LabInfo);<\/p>\n
QList<QCameraInfo> cameras = QCameraInfo::availableCameras();
\n if (cameras.size()>0)
\n {
\n iniCamera(); \/\/\u521d\u59cb\u5316\u6444\u50cf\u5934
\n iniImageCapture();\/\/\u521d\u59cb\u5316\u9759\u6001\u6293\u56fe
\n iniVideoRecorder();\/\/\u521d\u59cb\u5316\u89c6\u9891\u5f55\u5236
\n curCamera->start();
\n }
\n}<\/p>\n
\u6784\u9020\u51fd\u6570\u9996\u5148\u8981\u521b\u5efa\u72b6\u6001\u680f\u4e0a\u663e\u793a\u4fe1\u606f\u7684\u6807\u7b7e，\u7136\u540e\u4f7f\u7528QCameraInfo\u7684\u9759\u6001\u51fd\u6570availableCameras()\u83b7\u53d6\u6444\u50cf\u5934\u5217\u8868cameras，\u5982\u679c\u5b58\u5728\u6444\u50cf\u5934\u8bbe\u5907，\u5c31\u4f9d\u6b21\u8c03\u75283\u4e2a\u521d\u59cb\u5316\u51fd\u6570\u8fdb\u884c\u521d\u59cb\u5316，\u7136\u540e\u6253\u5f00\u6444\u50cf\u5934\u3002<\/p>\n
15.5.3\u3000QCamera\u5bf9\u8c61\u521b\u5efa\u4e0e\u63a7\u5236<\/h4>\n
iniCamera()\u51fd\u6570\u8fdb\u884cQCamera\u5bf9\u8c61\u7684\u521b\u5efa\u4e0e\u521d\u59cb\u5316，\u5728MainWindow\u7684\u6784\u9020\u51fd\u6570\u91cc\u8c03\u7528，\u4e0b\u9762\u662finiCamera()\u51fd\u6570\u7684\u4ee3\u7801：<\/p>\n
void MainWindow::iniCamera()
\n{\/\/ \u521b\u5efa QCamera\u5bf9\u8c61
\n QCameraInfo curCameraInfo=QCameraInfo::defaultCamera(); \/\/\u83b7\u53d6\u7f3a\u7701\u6444\u50cf\u5934
\n ui->comboCamera->addItem(curCameraInfo.description());
\n ui->comboCamera->setCurrentIndex(0);<\/p>\n
curCamera=new QCamera(curCameraInfo, this); \/\/\u521b\u5efa\u6444\u50cf\u5934\u5bf9\u8c61
\n QCameraViewfinderSettings viewfinderSettings;
\n viewfinderSettings.setResolution(640, 480);
\n viewfinderSettings.setMinimumFrameRate(15.0);
\n viewfinderSettings.setMaximumFrameRate(30.0);
\n curCamera->setViewfinderSettings(viewfinderSettings);
\n curCamera->setViewfinder(ui->viewFinder); \/\/\u8bbe\u7f6e\u9884\u89c8\u6846
\n curCamera->setCaptureMode(QCamera::CaptureViewfinder);
\n\/\/\u5224\u65ad\u6444\u50cf\u5934\u662f\u5426\u652f\u6301\u6293\u56fe\u3001\u5f55\u5236\u89c6\u9891
\n ui->checkStillImage->setChecked(
\n curCamera->isCaptureModeSupported(QCamera::CaptureStillImage)); \/\/\u6293\u56fe
\n ui->checkVideo->setChecked(
\n curCamera->isCaptureModeSupported(QCamera::CaptureVideo));\/\/\u89c6\u9891\u5f55\u5236<\/p>\n
connect(curCamera,SIGNAL(stateChanged(QCamera::State)),
\n this,SLOT(on_cameraStateChanged(QCamera::State)));
\n\/\/Windows\u5e73\u53f0\u4e0a\u4e0d\u652f\u6301captureModeChanged()\u4fe1\u53f7
\n connect(curCamera,SIGNAL(captureModeChanged(QCamera::CaptureModes)),
\n this,SLOT(on_cameraCaptureModeChanged(QCamera::CaptureModes)));
\n}<\/p>\n
\u8fd9\u91cc\u7528QCameraInfo::defaultCamera()\u83b7\u53d6\u7f3a\u7701\u7684\u6444\u50cf\u5934\u8bbe\u5907，\u7136\u540e\u7528\u4e8e\u521b\u5efaQCamera\u5bf9\u8c61\u5b9e\u4f8bcurCamera\u3002<\/p>\n
QCamera::setViewfinder()\u51fd\u6570\u7528\u4e8e\u8bbe\u7f6e\u53d6\u666f\u6846\u9884\u89c8\u7ec4\u4ef6\u3002<\/p>\n
QCamera::setCaptureMode()\u51fd\u6570\u8bbe\u7f6e\u6444\u50cf\u5934\u7684\u6293\u53d6\u6a21\u5f0f\u3002<\/p>\n
\u7136\u540e\u67e5\u8be2curCamera\u662f\u5426\u652f\u6301\u6293\u56fe\u3001\u652f\u6301\u5f55\u50cf，\u5e76\u66f4\u65b0\u754c\u9762\u4e0a\u7684\u590d\u9009\u6846\u7684\u72b6\u6001\u3002<\/p>\n
\u4e3acurCamera\u7684\u4e24\u4e2a\u4fe1\u53f7\u5206\u522b\u8bbe\u7f6e\u4e86\u5173\u8054\u7684\u69fd\u51fd\u6570\u3002stateChanged()\u5728\u6444\u50cf\u5934\u72b6\u6001\u53d8\u5316\u65f6\u53d1\u5c04，captureModeChanged()\u5219\u5728\u6444\u50cf\u5934\u6293\u53d6\u6a21\u5f0f\u53d8\u5316\u65f6\u53d1\u5c04，\u4e0d\u8fc7\u5728Windows\u5e73\u53f0\u4e0a\u4e0d\u4f1a\u53d1\u5c04captureModeChanged()\u4fe1\u53f7\u3002\u8fd9\u4e24\u4e2a\u69fd\u51fd\u6570\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_cameraStateChanged(QCamera::State state)
\n{
\n switch (state)
\n {
\n case QCamera::UnloadedState:
\n LabCameraState->setText("\u6444\u50cf\u5934state: UnloadedState"); break;
\n case QCamera::LoadedState:
\n LabCameraState->setText("\u6444\u50cf\u5934state: LoadedState"); break;
\n case QCamera::ActiveState:
\n LabCameraState->setText("\u6444\u50cf\u5934state: ActiveState");
\n }
\n ui->actStartCamera->setEnabled(state!=QCamera::ActiveState);
\n ui->actStopCamera->setEnabled(state==QCamera::ActiveState);
\n}
\nvoid MainWindow::on_cameraCaptureModeChanged(QCamera::CaptureModes mode)
\n{
\n if (mode==QCamera::CaptureStillImage)
\n LabCameraMode->setText("\u6293\u53d6\u6a21\u5f0f: StillImage");
\n else if (mode==QCamera::CaptureVideo)
\n LabCameraMode->setText("\u6293\u53d6\u6a21\u5f0f: Video");
\n else
\n LabCameraMode->setText("\u6293\u53d6\u6a21\u5f0f: Viewfinder");
\n}<\/p>\n
\u7a97\u53e3\u5de5\u5177\u680f\u4e0a\u7684\u201c\u5f00\u542f\u6444\u50cf\u5934\u201d\u548c\u201c\u5173\u95ed\u6444\u50cf\u5934\u201d\u4e24\u4e2a\u6309\u94ae\u63a7\u5236\u6444\u50cf\u5934\u7684\u5f00\u542f\u548c\u5173\u95ed，\u5176\u5173\u8054Action\u7684\u69fd\u51fd\u6570\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_actStartCamera_triggered()
\n{\/\/\u5f00\u542f\u6444\u50cf\u5934
\n curCamera->start();
\n}
\nvoid MainWindow::on_actStopCamera_triggered()
\n{\/\/\u5173\u95ed\u6444\u50cf\u5934
\n curCamera->stop();
\n}<\/p>\n
\u5f00\u542f\u548c\u5173\u95ed\u6444\u50cf\u5934\u65f6，QCamera\u5bf9\u8c61\u4f1a\u53d1\u5c04stateChanged()\u4fe1\u53f7\u3002\u5f00\u542f\u6444\u50cf\u5934\u4e4b\u540e，\u6444\u50cf\u5934\u72b6\u6001\u4e3aQCamera::ActiveState，\u5173\u95ed\u4e4b\u540e\u72b6\u6001\u4f1a\u53d8\u6210QCamera::LoadedState\u3002<\/p>\n
15.5.4\u3000QCameraImageCapture\u6293\u53d6\u9759\u6001\u56fe\u7247<\/h4>\n
QCameraImageCapture\u7c7b\u5bf9\u8c61imageCapture\u7528\u4e8e\u901a\u8fc7\u6444\u50cf\u5934\u6293\u53d6\u9759\u6001\u56fe\u7247，iniImageCapture()\u51fd\u6570\u7528\u4e8e\u521b\u5efaimageCapture\u5e76\u8fdb\u884c\u521d\u59cb\u5316\u8bbe\u7f6e，MainWindow\u6784\u9020\u51fd\u6570\u8c03\u7528\u6b64\u51fd\u6570\u3002IniImageCapture()\u51fd\u6570\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::iniImageCapture()
\n{\/\/\u521b\u5efa QCameraImageCapture\u5bf9\u8c61
\n imageCapture = new QCameraImageCapture(curCamera,this);
\n imageCapture->setBufferFormat(QVideoFrame::Format_Jpeg); \/\/\u7f13\u51b2\u533a\u683c\u5f0f
\n imageCapture->setCaptureDestination(
\n QCameraImageCapture::CaptureToFile); \/\/\u4fdd\u5b58\u76ee\u6807
\n connect(imageCapture, SIGNAL(readyForCaptureChanged(bool)),
\n this, SLOT(on_imageReadyForCapture(bool)));
\n connect(imageCapture,SIGNAL(imageCaptured(int, const QImage &)),
\n this,SLOT(on_imageCaptured(int, const QImage &)));
\n connect(imageCapture,SIGNAL(imageSaved(int, const QString &)),
\n this,SLOT(on_imageSaved(int, const QString &)));
\n}<\/p>\n
\u521b\u5efaQCameraImageCapture\u5bf9\u8c61imageCapture\u65f6\u4f20\u9012QCamera\u5bf9\u8c61curCamera\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570，\u5efa\u7acb\u4e0e\u6444\u50cf\u5934\u8bbe\u5907\u7684\u5173\u8054\u3002<\/p>\n
setBufferFormat(QVideoFrame::Format_Jpeg)\u8bbe\u7f6e\u7f13\u51b2\u533a\u91cc\u56fe\u7247\u4e3aJPG\u683c\u5f0f\u3002<\/p>\n
setCaptureDestination(QCameraImageCapture::CaptureToFile)\u8bbe\u7f6e\u6293\u56fe\u5b58\u50a8\u76ee\u6807\u4e3a\u6587\u4ef6，\u6293\u53d6\u7684\u56fe\u7247\u6587\u4ef6\u4f1a\u81ea\u52a8\u4fdd\u5b58\u5230\u7528\u6237\u76ee\u5f55\u7684\u201c\u56fe\u7247\u201d\u6587\u4ef6\u5939\u91cc\u3002<\/p>\n
\u4e3aimageCapture\u76843\u4e2a\u4fe1\u53f7\u5173\u8054\u4e86\u81ea\u5b9a\u4e49\u69fd\u51fd\u6570，\u8fd93\u4e2a\u69fd\u51fd\u6570\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_imageReadyForCapture(bool ready)
\n{ \/\/\u53ef\u4ee5\u6293\u56fe\u4e86
\n ui->actCapture->setEnabled(ready);
\n}
\nvoid MainWindow::on_imageCaptured(int id, const QImage &preview)
\n{ \/\/\u6293\u53d6\u56fe\u7247\u540e\u663e\u793a
\n Q_UNUSED(id);
\n QImage scaledImage = preview.scaled(ui->LabCapturedImage->size(),
\n Qt::KeepAspectRatio, Qt::SmoothTransformation);
\n ui->LabCapturedImage->setPixmap(QPixmap::fromImage(scaledImage));
\n}
\nvoid MainWindow::on_imageSaved(int id, const QString &fileName)
\n{ \/\/\u6587\u4ef6\u4fdd\u5b58\u540e\u663e\u793a\u4fdd\u5b58\u7684\u6587\u4ef6\u540d
\n Q_UNUSED(id);
\n LabInfo->setText("\u56fe\u7247\u4fdd\u5b58\u4e3a： "+fileName);
\n}<\/p>\n
\u5355\u51fb\u7a97\u53e3\u5de5\u5177\u680f\u4e0a\u7684\u201c\u6293\u56fe\u201d\u6309\u94ae\u53ef\u5b9e\u73b0\u6293\u53d6\u9759\u6001\u56fe\u7247\u529f\u80fd，\u5176\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_actCapture_triggered()
\n{\/\/\u6293\u56fe \u6309\u94ae
\n if (curCamera->captureMode()!=QCamera::CaptureStillImage)
\n curCamera->setCaptureMode(QCamera::CaptureStillImage);
\n imageCapture->capture();
\n}<\/p>\n
\u8fd9\u91cc\u9996\u5148\u5c06curCamera\u7684\u6293\u53d6\u6a21\u5f0f\u8bbe\u7f6e\u4e3aQCamera::CaptureStillImage，\u7136\u540e\u4f7f\u7528QCameraImage Capture::capture()\u51fd\u6570\u6293\u56fe\u3002<\/p>\n
15.5.5\u3000QMediaRecorder\u89c6\u9891\u5f55\u5236<\/h4>\n
QMediaRecorder\u7c7b\u5bf9\u8c61mediaRecorder\u7528\u4e8e\u901a\u8fc7\u6444\u50cf\u5934\u8fdb\u884c\u89c6\u9891\u5f55\u5236，iniVideoRecorder()\u51fd\u6570\u521b\u5efamediaRecorder\u5e76\u8fdb\u884c\u521d\u59cb\u5316\u8bbe\u7f6e，MainWindow\u6784\u9020\u51fd\u6570\u8c03\u7528\u6b64\u51fd\u6570\u3002iniVideoRecorder()\u51fd\u6570\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::iniVideoRecorder()
\n{\/\/\u521b\u5efaQMediaRecorder\u5bf9\u8c61
\n mediaRecorder = new QMediaRecorder(curCamera,this);
\n ui->chkMute->setChecked(mediaRecorder->isMuted());
\n connect(mediaRecorder, SIGNAL(stateChanged(QMediaRecorder::State)),
\n this, SLOT(on_videoStateChanged(QMediaRecorder::State)));
\n connect(mediaRecorder, SIGNAL(durationChanged(qint64)),
\n this, SLOT(on_videoDurationChanged(qint64)));
\n}<\/p>\n
mediaRecorder\u521b\u5efa\u65f6\u4f20\u9012QCamera\u5bf9\u8c61curCamera\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570\u3002<\/p>\n
\u4e3amediaRecorder\u7684\u4e24\u4e2a\u4fe1\u53f7\u8bbe\u7f6e\u4e86\u5173\u8054\u69fd\u51fd\u6570，\u4e24\u4e2a\u69fd\u51fd\u6570\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_video_stateChanged(QMediaRecorder::State state)
\n{\/\/\u72b6\u6001\u53d8\u5316
\n ui->actVideoRecord->setEnabled(state!=QMediaRecorder::RecordingState);
\n ui->actVideoStop->setEnabled(state==QMediaRecorder::RecordingState);
\n}
\nvoid MainWindow::on_video_durationChanged(qint64 duration)
\n{
\n ui->LabDuration->setText(QString("\u5f55\u5236\u65f6\u95f4:%1 \u79d2").arg(duration\/1000));
\n}<\/p>\n
on_videoStateChanged()\u51fd\u6570\u4f1a\u6839\u636e\u5f53\u524d\u72b6\u6001\u63a7\u5236\u754c\u9762\u6309\u94ae\u7684\u4f7f\u80fd\u72b6\u6001，on_videoDuration Changed()\u51fd\u6570\u7528\u4e8e\u5f55\u5236\u89c6\u9891\u65f6\u663e\u793a\u5df2\u5f55\u5236\u7684\u6301\u7eed\u65f6\u95f4\u3002<\/p>\n
\u5f00\u59cb\u5f55\u50cf\u4e4b\u524d，\u9700\u8981\u5355\u51fb\u201c\u89c6\u9891\u4fdd\u5b58\u6587\u4ef6\u201d\u6309\u94ae\u8bbe\u7f6e\u4e00\u4e2a\u89c6\u9891\u5f55\u5236\u4fdd\u5b58\u7684\u6587\u4ef6\u3002\u201c\u5f00\u59cb\u5f55\u50cf\u201d\u548c\u201c\u505c\u6b62\u5f55\u50cf\u201d\u4e24\u4e2a\u6309\u94ae\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n
void MainWindow::on_actVideoRecord_triggered()
\n{\/\/\u5f00\u59cb\u5f55\u50cf
\n if (!mediaRecorder->isAvailable())
\n {
\n QMessageBox::critical(this,"\u9519\u8bef",
\n "\u4e0d\u652f\u6301\u89c6\u9891\u5f55\u5236！\\\\n mediaRecorder->isAvailable()==false");
\n return;
\n }
\n if (curCamera->captureMode()!=QCamera::CaptureVideo)
\n curCamera->setCaptureMode(QCamera::CaptureVideo);<\/p>\n
QString selectedFile=ui->editOutputFile->text().trimmed();
\n if (selectedFile.isEmpty())
\n { QMessageBox::critical(this,"\u9519\u8bef","\u8bf7\u5148\u8bbe\u7f6e\u5f55\u97f3\u8f93\u51fa\u6587\u4ef6");
\n return;
\n }
\n if (QFile::exists(selectedFile))
\n if (!QFile::remove(selectedFile))
\n { QMessageBox::critical(this,"\u9519\u8bef","\u6240\u8bbe\u7f6e\u5f55\u97f3\u8f93\u51fa\u6587\u4ef6\u88ab\u5360\u7528，\u65e0\u6cd5\u5220\u9664");
\n return;
\n }<\/p>\n
mediaRecorder->setOutputLocation(QUrl::fromLocalFile(selectedFile));
\n mediaRecorder->record();
\n}
\nvoid MainWindow::on_actVideoStop_triggered()
\n{\/\/\u505c\u6b62\u5f55\u50cf
\n mediaRecorder->stop();
\n}<\/p>\n
\u5f00\u59cb\u5f55\u50cf\u4e4b\u524d，\u8fd8\u9700\u8981\u5c06\u6444\u50cf\u5934\u7684\u6293\u53d6\u72b6\u6001\u8bbe\u7f6e\u4e3aQCamera::CaptureVideo，\u7136\u540e\u68c0\u67e5\u8bbe\u7f6e\u7684\u89c6\u9891\u8f93\u51fa\u6587\u4ef6，\u5f53\u6587\u4ef6\u6ca1\u95ee\u9898\u540e\u7528setOutputLocation()\u51fd\u6570\u8bbe\u7f6e\u89c6\u9891\u5f55\u5236\u8f93\u51fa\u6587\u4ef6\u3002<\/p>\n
\u8c03\u7528QMediaRecorder\u7684record()\u51fd\u6570\u5f00\u59cb\u5f55\u50cf，stop()\u51fd\u6570\u505c\u6b62\u5f55\u50cf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7b2c15\u7ae0\u3000\u591a\u5a92\u4f53
\n\u591a\u5a92\u4f53\u529f\u80fd\u6307\u7684\u4e3b\u8981\u662f\u8ba1\u7b97\u673a\u7684\u97f3\u9891\u548c\u89c6\u9891\u7684\u8f93\u5165\u3001\u8f93\u51fa\u3001\u663e\u793a\u548c\u64ad\u653e\u7b49\u529f\u80fd，Qt\u7684\u591a\u5a92\u4f53\u6a21\u5757\u4e3a\u97f3\u9891\u548c\u89c6\u9891\u64ad\u653e\u3001\u5f55\u97f3\u3001\u6444\u50cf\u5934\u62cd\u7167\u548c\u5f55\u50cf\u7b49\u63d0\u4f9b\u652f\u6301，\u751a\u81f3\u8fd8\u63d0\u4f9b\u6570\u5b57\u6536\u97f3\u673a\u7684\u652f\u6301\u3002\u672c\u7ae0\u5c06\u4ecb\u7ecdQt\u591a\u5a92\u4f53\u6a21\u5757\u7684\u529f\u80fd\u548c\u4f7f\u7528\u3002
\n15.1\u3000Qt\u591a\u5a92\u4f53\u6a21\u5757\u529f\u80fd\u6982\u8ff0
\nQt\u591a\u5a92\u4f53\u6a21\u5757\u63d0\u4f9b\u4e86\u5f88\u591a\u7c7b，\u53ef\u4ee5\u5b9e\u73b0\u5982\u4e0b\u7684\u4e00\u4e9b\u529f\u80fd：\u8bbf\u95ee\u539f\u59cb\u97f3\u9891\u8bbe\u5907\u8fdb\u884c\u8f93\u5165\u6216\u8f93\u51fa；\u4f4e\u5ef6\u8fdf\u64ad\u653e\u97f3\u6548\u6587\u4ef6，\u5982WAV\u6587\u4ef6；\u4f7f\u7528\u64ad<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10580,218,305],"topic":[],"class_list":["post-109023","post","type-post","status-publish","format-standard","hentry","category-server","tag-qt5","tag-qt","tag-305"],"yoast_head":"\n
\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/109023.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u7b2c15\u7ae0\u3000\u591a\u5a92\u4f53 \u591a\u5a92\u4f53\u529f\u80fd\u6307\u7684\u4e3b\u8981\u662f\u8ba1\u7b97\u673a\u7684\u97f3\u9891\u548c\u89c6\u9891\u7684\u8f93\u5165\u3001\u8f93\u51fa\u3001\u663e\u793a\u548c\u64ad\u653e\u7b49\u529f\u80fd，Qt\u7684\u591a\u5a92\u4f53\u6a21\u5757\u4e3a\u97f3\u9891\u548c\u89c6\u9891\u64ad\u653e\u3001\u5f55\u97f3\u3001\u6444\u50cf\u5934\u62cd\u7167\u548c\u5f55\u50cf\u7b49\u63d0\u4f9b\u652f\u6301，\u751a\u81f3\u8fd8\u63d0\u4f9b\u6570\u5b57\u6536\u97f3\u673a\u7684\u652f\u6301\u3002\u672c\u7ae0\u5c06\u4ecb\u7ecdQt\u591a\u5a92\u4f53\u6a21\u5757\u7684\u529f\u80fd\u548c\u4f7f\u7528\u3002 15.1\u3000Qt\u591a\u5a92\u4f53\u6a21\u5757\u529f\u80fd\u6982\u8ff0 Qt\u591a\u5a92\u4f53\u6a21\u5757\u63d0\u4f9b\u4e86\u5f88\u591a\u7c7b，\u53ef\u4ee5\u5b9e\u73b0\u5982\u4e0b\u7684\u4e00\u4e9b\u529f\u80fd：\u8bbf\u95ee\u539f\u59cb\u97f3\u9891\u8bbe\u5907\u8fdb\u884c\u8f93\u5165\u6216\u8f93\u51fa；\u4f4e\u5ef6\u8fdf\u64ad\u653e\u97f3\u6548\u6587\u4ef6，\u5982WAV\u6587\u4ef6；\u4f7f\u7528\u64ad\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/109023.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-22T23:56:54+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"24 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/109023.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/109023.html\",\"name\":\"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-09-22T23:56:54+00:00\",\"dateModified\":\"2026-09-22T23:56:54+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/109023.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/109023.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/109023.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/109023.html","og_locale":"zh_CN","og_type":"article","og_title":"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u7b2c15\u7ae0\u3000\u591a\u5a92\u4f53 \u591a\u5a92\u4f53\u529f\u80fd\u6307\u7684\u4e3b\u8981\u662f\u8ba1\u7b97\u673a\u7684\u97f3\u9891\u548c\u89c6\u9891\u7684\u8f93\u5165\u3001\u8f93\u51fa\u3001\u663e\u793a\u548c\u64ad\u653e\u7b49\u529f\u80fd，Qt\u7684\u591a\u5a92\u4f53\u6a21\u5757\u4e3a\u97f3\u9891\u548c\u89c6\u9891\u64ad\u653e\u3001\u5f55\u97f3\u3001\u6444\u50cf\u5934\u62cd\u7167\u548c\u5f55\u50cf\u7b49\u63d0\u4f9b\u652f\u6301，\u751a\u81f3\u8fd8\u63d0\u4f9b\u6570\u5b57\u6536\u97f3\u673a\u7684\u652f\u6301\u3002\u672c\u7ae0\u5c06\u4ecb\u7ecdQt\u591a\u5a92\u4f53\u6a21\u5757\u7684\u529f\u80fd\u548c\u4f7f\u7528\u3002 15.1\u3000Qt\u591a\u5a92\u4f53\u6a21\u5757\u529f\u80fd\u6982\u8ff0 Qt\u591a\u5a92\u4f53\u6a21\u5757\u63d0\u4f9b\u4e86\u5f88\u591a\u7c7b，\u53ef\u4ee5\u5b9e\u73b0\u5982\u4e0b\u7684\u4e00\u4e9b\u529f\u80fd：\u8bbf\u95ee\u539f\u59cb\u97f3\u9891\u8bbe\u5907\u8fdb\u884c\u8f93\u5165\u6216\u8f93\u51fa；\u4f4e\u5ef6\u8fdf\u64ad\u653e\u97f3\u6548\u6587\u4ef6，\u5982WAV\u6587\u4ef6；\u4f7f\u7528\u64ad","og_url":"https:\/\/www.wsisp.com\/helps\/109023.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-09-22T23:56:54+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"24 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/109023.html","url":"https:\/\/www.wsisp.com\/helps\/109023.html","name":"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-09-22T23:56:54+00:00","dateModified":"2026-09-22T23:56:54+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/109023.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/109023.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/109023.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u3010Qt\u3011\u300aQt 5.9 C++\u5f00\u53d1\u6307\u5357\u300b\u7b14\u8bb0-Chapter15-\u591a\u5a92\u4f53"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/109023","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=109023"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/109023\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=109023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=109023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=109023"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=109023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}