public AudioVisualizer(Pipeline pipeline) : base(pipeline)
{
InConnector = CreateInputConnectorFrom <AudioBuffer>(pipeline, nameof(In));
resampler = new AudioResampler(this, new AudioResamplerConfiguration()
{
OutputFormat = WaveFormat.Create16kHz1ChannelIeeeFloat()
});
InConnector.Out.PipeTo(resampler.In, DeliveryPolicy.Unlimited);
resampler.Out.Do(Process);
PipelineCompleted += OnPipelineCompleted;
display.PropertyChanged += (sender, e) => {
if (e.PropertyName == nameof(display.AudioImage))
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Image)));
}
};
}
public void WaveFormat_Create16kHz1ChannelIeeeFloat()
{
// Define "native" WAVEFORMATEX structure for IEEE float PCM
byte[] formatBytes = new byte[]
{
0x03, 0x00, // FormatTag = 3
0x01, 0x00, // Channels = 1
0x80, 0x3e, 0x00, 0x00, // SamplesPerSec = 16000
0x00, 0xfa, 0x00, 0x00, // AvgBytesPerSec = 64800
0x04, 0x00, // BlockAlign = 4
0x20, 0x00, // BitsPerSample = 32
0x00, 0x00, // ExtraSize = 0
};
// Create equivalent managed WaveFormat object
WaveFormat format = WaveFormat.Create16kHz1ChannelIeeeFloat();
// Verify against expected
this.MarshalAndVerify(format, formatBytes);
}
private void ButtonCreate16kHz1ChannelIeeeFloat_Click(object sender, RoutedEventArgs e)
{
Update(WaveFormat.Create16kHz1ChannelIeeeFloat());
}