/// <summary>
/// Attaches a hardware device context to the specified video component.
/// </summary>
/// <param name="component">The component.</param>
/// <exception cref="Exception">Throws when unable to initialize the hardware device</exception>
public void AttachDevice(VideoComponent component)
{
var result = 0;
fixed(AVBufferRef **devContextRef = &component.HardwareDeviceContext)
{
result = ffmpeg.av_hwdevice_ctx_create(devContextRef, DeviceType, null, null, 0);
if (result < 0)
{
throw new Exception($"Unable to initialize hardware context for device {Name}");
}
}
component.HardwareAccelerator = this;
component.CodecContext->hw_device_ctx = ffmpeg.av_buffer_ref(component.HardwareDeviceContext);
component.CodecContext->get_format = GetFormatCallback;
}
/// <summary>
/// Detaches and disposes the hardware device context from the specified video component
/// </summary>
/// <param name="component">The component.</param>
public void DetachDevice(VideoComponent component)
{
// TODO: Check the blow code in the future because I am not sure
// how to uninitialize the hardware device context
if (component.CodecContext != null)
{
ffmpeg.av_buffer_unref(&component.CodecContext->hw_device_ctx);
component.CodecContext->hw_device_ctx = null;
}
if (component.HardwareDeviceContext != null)
{
fixed(AVBufferRef **hwdc = &component.HardwareDeviceContext)
{
ffmpeg.av_buffer_unref(hwdc);
component.HardwareDeviceContext = null;
component.HardwareAccelerator = null;
}
}
}
