public Recorder(string fileName,
FourCC codec, int quality,
int audioSourceIndex, SupportedWaveFormat audioWaveFormat, bool encodeAudio, int audioBitRate)
{
System.Windows.Media.Matrix toDevice;
using (var source = new HwndSource(new HwndSourceParameters()))
{
toDevice = source.CompositionTarget.TransformToDevice;
}
screenWidth = (int)Math.Round(SystemParameters.PrimaryScreenWidth * toDevice.M11);
screenHeight = (int)Math.Round(SystemParameters.PrimaryScreenHeight * toDevice.M22);
// Create AVI writer and specify FPS
writer = new AviWriter(fileName)
{
FramesPerSecond = 10,
EmitIndex1 = true,
};
// Create video stream
videoStream = CreateVideoStream(codec, quality);
// Set only name. Other properties were when creating stream,
// either explicitly by arguments or implicitly by the encoder used
videoStream.Name = "Screencast";
if (audioSourceIndex >= 0)
{
var waveFormat = ToWaveFormat(audioWaveFormat);
audioStream = CreateAudioStream(waveFormat, encodeAudio, audioBitRate);
// Set only name. Other properties were when creating stream,
// either explicitly by arguments or implicitly by the encoder used
audioStream.Name = "Voice";
audioSource = new WaveInEvent
{
DeviceNumber = audioSourceIndex,
WaveFormat = waveFormat,
// Buffer size to store duration of 1 frame
BufferMilliseconds = (int)Math.Ceiling(1000 / writer.FramesPerSecond),
NumberOfBuffers = 3,
};
audioSource.DataAvailable += audioSource_DataAvailable;
}
screenThread = new Thread(RecordScreen)
{
Name = typeof(Recorder).Name + ".RecordScreen",
IsBackground = true
};
if (audioSource != null)
{
videoFrameWritten.Set();
audioBlockWritten.Reset();
audioSource.StartRecording();
}
screenThread.Start();
}
/// <summary>
/// Checks to see if a given SupportedWaveFormat is supported
/// </summary>
/// <param name="waveFormat">The SupportedWaveFormat</param>
/// <returns>true if supported</returns>
public bool SupportsWaveFormat(SupportedWaveFormat waveFormat)
{
return (supportedFormats & waveFormat) == waveFormat;
}
private static WaveFormat ToWaveFormat(SupportedWaveFormat waveFormat)
{
switch (waveFormat)
{
case SupportedWaveFormat.WAVE_FORMAT_44M16:
return new WaveFormat(44100, 16, 1);
case SupportedWaveFormat.WAVE_FORMAT_44S16:
return new WaveFormat(44100, 16, 2);
default:
throw new NotSupportedException("Wave formats other than '16-bit 44.1kHz' are not currently supported.");
}
}
private void ShowSettingsDialog()
{
var dlg = new SettingsWindow()
{
Owner = this,
Folder = outputFolder,
Encoder = encoder,
Quality = encodingQuality,
SelectedAudioSourceIndex = audioSourceIndex,
AudioWaveFormat = audioWaveFormat,
EncodeAudio = encodeAudio,
AudioQuality = audioQuality,
MinimizeOnStart = minimizeOnStart
};
if (dlg.ShowDialog() == true)
{
outputFolder = dlg.Folder;
encoder = dlg.Encoder;
encodingQuality = dlg.Quality;
audioSourceIndex = dlg.SelectedAudioSourceIndex;
audioWaveFormat = dlg.AudioWaveFormat;
encodeAudio = dlg.EncodeAudio;
audioQuality = dlg.AudioQuality;
minimizeOnStart = dlg.MinimizeOnStart;
}
}
private void InitDefaultSettings()
{
var exePath = new Uri(System.Reflection.Assembly.GetEntryAssembly().Location).LocalPath;
outputFolder = System.IO.Path.GetDirectoryName(exePath);
encoder = KnownFourCCs.Codecs.MotionJpeg;
encodingQuality = 70;
audioSourceIndex = -1;
audioWaveFormat = SupportedWaveFormat.WAVE_FORMAT_44M16;
encodeAudio = true;
audioQuality = (Mp3AudioEncoderLame.SupportedBitRates.Length + 1) / 2;
minimizeOnStart = true;
}
/// <summary>
/// Checks to see if a given SupportedWaveFormat is supported
/// </summary>
/// <param name="waveFormat">The SupportedWaveFormat</param>
/// <returns>true if supported</returns>
public bool SupportsWaveFormat(SupportedWaveFormat waveFormat)
{
return((supportedFormats & waveFormat) == waveFormat);
}
/// <summary> /// Checks to see if a given SupportedWaveFormat is supported /// </summary> /// <param name="waveFormat">The SupportedWaveFormat</param> /// <returns>true if supported</returns> internal bool SupportsWaveFormat(SupportedWaveFormat waveFormat) => (supportedFormats & waveFormat) == waveFormat;
public bool SupportsWaveFormat(SupportedWaveFormat WaveFormat) => WaveIn.GetCapabilities(DeviceNumber).SupportsWaveFormat(WaveFormat);