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<h1 class="title">videosettings.cpp Example File</h1>
<span class="subtitle">multimediawidgets/camera/videosettings.cpp</span>
<!-- $$$multimediawidgets/camera/videosettings.cpp-description -->
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<pre class="cpp">

  <span class="comment">/****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** &quot;Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
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  **     the documentation and/or other materials provided with the
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  ****************************************************************************/</span>

  <span class="preprocessor">#include &quot;videosettings.h&quot;</span>
  <span class="preprocessor">#include &quot;ui_videosettings.h&quot;</span>

  <span class="preprocessor">#include &lt;QComboBox&gt;</span>
  <span class="preprocessor">#include &lt;QDebug&gt;</span>
  <span class="preprocessor">#include &lt;QMediaRecorder&gt;</span>
  <span class="preprocessor">#include &lt;QMediaService&gt;</span>

  VideoSettings<span class="operator">::</span>VideoSettings(<span class="type"><a href="qmediarecorder.html">QMediaRecorder</a></span> <span class="operator">*</span>mediaRecorder<span class="operator">,</span> <span class="type">QWidget</span> <span class="operator">*</span>parent) :
      <span class="type">QDialog</span>(parent)<span class="operator">,</span>
      ui(<span class="keyword">new</span> Ui<span class="operator">::</span>VideoSettingsUi)<span class="operator">,</span>
      mediaRecorder(mediaRecorder)
  {
      ui<span class="operator">-</span><span class="operator">&gt;</span>setupUi(<span class="keyword">this</span>);

      <span class="comment">//audio codecs</span>
      ui<span class="operator">-</span><span class="operator">&gt;</span>audioCodecBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Default audio codec&quot;</span>)<span class="operator">,</span> <span class="type">QVariant</span>(<span class="type">QString</span>()));
      <span class="keyword">const</span> <span class="type">QStringList</span> supportedAudioCodecs <span class="operator">=</span>  mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedAudioCodecs();
      <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&amp;</span>codecName : supportedAudioCodecs) {
          <span class="type">QString</span> description <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>audioCodecDescription(codecName);
          ui<span class="operator">-</span><span class="operator">&gt;</span>audioCodecBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(codecName <span class="operator">+</span> <span class="string">&quot;: &quot;</span> <span class="operator">+</span> description<span class="operator">,</span> <span class="type">QVariant</span>(codecName));
      }

      <span class="comment">//sample rate:</span>
      <span class="keyword">const</span> <span class="type">QList</span><span class="operator">&lt;</span><span class="type">int</span><span class="operator">&gt;</span>supportedAudioSampleRates <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedAudioSampleRates();
      <span class="keyword">for</span> (<span class="type">int</span> sampleRate : supportedAudioSampleRates)
          ui<span class="operator">-</span><span class="operator">&gt;</span>audioSampleRateBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(<span class="type">QString</span><span class="operator">::</span>number(sampleRate)<span class="operator">,</span> <span class="type">QVariant</span>(sampleRate));

      ui<span class="operator">-</span><span class="operator">&gt;</span>audioQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="type">int</span>(<span class="type"><a href="qmultimedia.html">QMultimedia</a></span><span class="operator">::</span>VeryHighQuality));

      <span class="comment">//video codecs</span>
      ui<span class="operator">-</span><span class="operator">&gt;</span>videoCodecBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Default video codec&quot;</span>)<span class="operator">,</span> <span class="type">QVariant</span>(<span class="type">QString</span>()));
      <span class="keyword">const</span> <span class="type">QStringList</span> supportedVideoCodecs <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedVideoCodecs();
      <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&amp;</span>codecName : supportedVideoCodecs) {
          <span class="type">QString</span> description <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>videoCodecDescription(codecName);
          ui<span class="operator">-</span><span class="operator">&gt;</span>videoCodecBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(codecName <span class="operator">+</span> <span class="string">&quot;: &quot;</span> <span class="operator">+</span> description<span class="operator">,</span> <span class="type">QVariant</span>(codecName));
      }

      ui<span class="operator">-</span><span class="operator">&gt;</span>videoQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>setRange(<span class="number">0</span><span class="operator">,</span> <span class="type">int</span>(<span class="type"><a href="qmultimedia.html">QMultimedia</a></span><span class="operator">::</span>VeryHighQuality));

      ui<span class="operator">-</span><span class="operator">&gt;</span>videoResolutionBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Default&quot;</span>));
      <span class="keyword">const</span> <span class="type">QList</span><span class="operator">&lt;</span><span class="type">QSize</span><span class="operator">&gt;</span> supportedResolutions <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedResolutions();
      <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QSize</span> <span class="operator">&amp;</span>resolution : supportedResolutions) {
          ui<span class="operator">-</span><span class="operator">&gt;</span>videoResolutionBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(<span class="type">QString</span>(<span class="string">&quot;%1x%2&quot;</span>)<span class="operator">.</span>arg(resolution<span class="operator">.</span>width())<span class="operator">.</span>arg(resolution<span class="operator">.</span>height())<span class="operator">,</span>
                                          <span class="type">QVariant</span>(resolution));
      }

      ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Default&quot;</span>));
      <span class="keyword">const</span> <span class="type">QList</span><span class="operator">&lt;</span><span class="type">qreal</span><span class="operator">&gt;</span> supportedFrameRates <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedFrameRates();
      <span class="keyword">for</span> (<span class="type">qreal</span> rate : supportedFrameRates) {
          <span class="type">QString</span> rateString <span class="operator">=</span> <span class="type">QString</span>(<span class="string">&quot;%1&quot;</span>)<span class="operator">.</span>arg(rate<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="char">'f'</span><span class="operator">,</span> <span class="number">2</span>);
          ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(rateString<span class="operator">,</span> <span class="type">QVariant</span>(rate));
      }

      <span class="comment">//containers</span>
      ui<span class="operator">-</span><span class="operator">&gt;</span>containerFormatBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(tr(<span class="string">&quot;Default container&quot;</span>)<span class="operator">,</span> <span class="type">QVariant</span>(<span class="type">QString</span>()));
      <span class="keyword">const</span> <span class="type">QStringList</span> formats <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>supportedContainers();
      <span class="keyword">for</span> (<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&amp;</span>format : formats) {
          ui<span class="operator">-</span><span class="operator">&gt;</span>containerFormatBox<span class="operator">-</span><span class="operator">&gt;</span>addItem(format <span class="operator">+</span> <span class="string">&quot;: &quot;</span> <span class="operator">+</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>containerDescription(format)<span class="operator">,</span>
                                          <span class="type">QVariant</span>(format));
      }
  }

  VideoSettings<span class="operator">::</span><span class="operator">~</span>VideoSettings()
  {
      <span class="keyword">delete</span> ui;
  }

  <span class="type">void</span> VideoSettings<span class="operator">::</span>changeEvent(<span class="type">QEvent</span> <span class="operator">*</span>e)
  {
      <span class="type">QDialog</span><span class="operator">::</span>changeEvent(e);
      <span class="keyword">switch</span> (e<span class="operator">-</span><span class="operator">&gt;</span>type()) {
      <span class="keyword">case</span> <span class="type">QEvent</span><span class="operator">::</span>LanguageChange:
          ui<span class="operator">-</span><span class="operator">&gt;</span>retranslateUi(<span class="keyword">this</span>);
          <span class="keyword">break</span>;
      <span class="keyword">default</span>:
          <span class="keyword">break</span>;
      }
  }

  <span class="type"><a href="qaudioencodersettings.html">QAudioEncoderSettings</a></span> VideoSettings<span class="operator">::</span>audioSettings() <span class="keyword">const</span>
  {
      <span class="type"><a href="qaudioencodersettings.html">QAudioEncoderSettings</a></span> settings <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>audioSettings();
      settings<span class="operator">.</span>setCodec(boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>audioCodecBox)<span class="operator">.</span>toString());
      settings<span class="operator">.</span>setQuality(<span class="type"><a href="qmultimedia.html">QMultimedia</a></span><span class="operator">::</span>EncodingQuality(ui<span class="operator">-</span><span class="operator">&gt;</span>audioQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>value()));
      settings<span class="operator">.</span>setSampleRate(boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>audioSampleRateBox)<span class="operator">.</span>toInt());
      <span class="keyword">return</span> settings;
  }

  <span class="type">void</span> VideoSettings<span class="operator">::</span>setAudioSettings(<span class="keyword">const</span> <span class="type"><a href="qaudioencodersettings.html">QAudioEncoderSettings</a></span> <span class="operator">&amp;</span>audioSettings)
  {
      selectComboBoxItem(ui<span class="operator">-</span><span class="operator">&gt;</span>audioCodecBox<span class="operator">,</span> <span class="type">QVariant</span>(audioSettings<span class="operator">.</span>codec()));
      selectComboBoxItem(ui<span class="operator">-</span><span class="operator">&gt;</span>audioSampleRateBox<span class="operator">,</span> <span class="type">QVariant</span>(audioSettings<span class="operator">.</span>sampleRate()));
      ui<span class="operator">-</span><span class="operator">&gt;</span>audioQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(audioSettings<span class="operator">.</span>quality());
  }

  <span class="type"><a href="qvideoencodersettings.html">QVideoEncoderSettings</a></span> VideoSettings<span class="operator">::</span>videoSettings() <span class="keyword">const</span>
  {
      <span class="type"><a href="qvideoencodersettings.html">QVideoEncoderSettings</a></span> settings <span class="operator">=</span> mediaRecorder<span class="operator">-</span><span class="operator">&gt;</span>videoSettings();
      settings<span class="operator">.</span>setCodec(boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>videoCodecBox)<span class="operator">.</span>toString());
      settings<span class="operator">.</span>setQuality(<span class="type"><a href="qmultimedia.html">QMultimedia</a></span><span class="operator">::</span>EncodingQuality(ui<span class="operator">-</span><span class="operator">&gt;</span>videoQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>value()));
      settings<span class="operator">.</span>setResolution(boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>videoResolutionBox)<span class="operator">.</span>toSize());
      settings<span class="operator">.</span>setFrameRate(boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox)<span class="operator">.</span>value<span class="operator">&lt;</span><span class="type">qreal</span><span class="operator">&gt;</span>());

      <span class="keyword">return</span> settings;
  }

  <span class="type">void</span> VideoSettings<span class="operator">::</span>setVideoSettings(<span class="keyword">const</span> <span class="type"><a href="qvideoencodersettings.html">QVideoEncoderSettings</a></span> <span class="operator">&amp;</span>videoSettings)
  {
      selectComboBoxItem(ui<span class="operator">-</span><span class="operator">&gt;</span>videoCodecBox<span class="operator">,</span> <span class="type">QVariant</span>(videoSettings<span class="operator">.</span>codec()));
      selectComboBoxItem(ui<span class="operator">-</span><span class="operator">&gt;</span>videoResolutionBox<span class="operator">,</span> <span class="type">QVariant</span>(videoSettings<span class="operator">.</span>resolution()));
      ui<span class="operator">-</span><span class="operator">&gt;</span>videoQualitySlider<span class="operator">-</span><span class="operator">&gt;</span>setValue(videoSettings<span class="operator">.</span>quality());

      <span class="comment">//special case for frame rate</span>
      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox<span class="operator">-</span><span class="operator">&gt;</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
          <span class="type">qreal</span> itemRate <span class="operator">=</span> ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox<span class="operator">-</span><span class="operator">&gt;</span>itemData(i)<span class="operator">.</span>value<span class="operator">&lt;</span><span class="type">qreal</span><span class="operator">&gt;</span>();
          <span class="keyword">if</span> (qFuzzyCompare(itemRate<span class="operator">,</span> videoSettings<span class="operator">.</span>frameRate())) {
              ui<span class="operator">-</span><span class="operator">&gt;</span>videoFramerateBox<span class="operator">-</span><span class="operator">&gt;</span>setCurrentIndex(i);
              <span class="keyword">break</span>;
          }
      }
  }

  <span class="type">QString</span> VideoSettings<span class="operator">::</span>format() <span class="keyword">const</span>
  {
      <span class="keyword">return</span> boxValue(ui<span class="operator">-</span><span class="operator">&gt;</span>containerFormatBox)<span class="operator">.</span>toString();
  }

  <span class="type">void</span> VideoSettings<span class="operator">::</span>setFormat(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&amp;</span>format)
  {
      selectComboBoxItem(ui<span class="operator">-</span><span class="operator">&gt;</span>containerFormatBox<span class="operator">,</span> <span class="type">QVariant</span>(format));
  }

  <span class="type">QVariant</span> VideoSettings<span class="operator">::</span>boxValue(<span class="keyword">const</span> <span class="type">QComboBox</span> <span class="operator">*</span>box) <span class="keyword">const</span>
  {
      <span class="type">int</span> idx <span class="operator">=</span> box<span class="operator">-</span><span class="operator">&gt;</span>currentIndex();
      <span class="keyword">if</span> (idx <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>)
          <span class="keyword">return</span> <span class="type">QVariant</span>();

      <span class="keyword">return</span> box<span class="operator">-</span><span class="operator">&gt;</span>itemData(idx);
  }

  <span class="type">void</span> VideoSettings<span class="operator">::</span>selectComboBoxItem(<span class="type">QComboBox</span> <span class="operator">*</span>box<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QVariant</span> <span class="operator">&amp;</span>value)
  {
      <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator">&lt;</span> box<span class="operator">-</span><span class="operator">&gt;</span>count(); <span class="operator">+</span><span class="operator">+</span>i) {
          <span class="keyword">if</span> (box<span class="operator">-</span><span class="operator">&gt;</span>itemData(i) <span class="operator">=</span><span class="operator">=</span> value) {
              box<span class="operator">-</span><span class="operator">&gt;</span>setCurrentIndex(i);
              <span class="keyword">break</span>;
          }
      }
  }

</pre>
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<!-- @@@multimediawidgets/camera/videosettings.cpp -->
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