public MfAudioWriter(string FileName,
Guid MediaSubtype,
WaveFormat Wf,
int AudioQuality)
{
_writer = MediaFactory.CreateSinkWriterFromURL(FileName, null, null);
_audioInBytesPerSecond = Wf.SampleRate * Wf.Channels * Wf.BitsPerSample / 8;
using (var audioTypeOut = MfWriter.GetMediaType(Wf))
{
audioTypeOut.Set(MediaTypeAttributeKeys.Subtype, MediaSubtype);
if (MediaSubtype == AudioFormatGuids.Aac)
{
audioTypeOut.Set(MediaTypeAttributeKeys.AudioAvgBytesPerSecond, MfWriter.GetAacBitrate(AudioQuality));
}
_writer.AddStream(audioTypeOut, out _);
}
using (var audioTypeIn = MfWriter.GetMediaType(Wf))
{
audioTypeIn.Set(MediaTypeAttributeKeys.Subtype, AudioFormatGuids.Pcm);
_writer.SetInputMediaType(StreamIndex, audioTypeIn, null);
}
_writer.BeginWriting();
}
public MfColorConverter(int Width, int Height, Device Device)
{
var transforms = MediaFactory.FindTransform(TransformCategoryGuids.VideoProcessor, TransformEnumFlag.All);
_colorConverter = transforms[0].ActivateObject <Transform>();
_deviceMan = new DXGIDeviceManager();
_deviceMan.ResetDevice(Device);
_colorConverter.ProcessMessage(TMessageType.SetD3DManager, _deviceMan.NativePointer);
using (var mediaTypeIn = new MediaType())
{
mediaTypeIn.Set(MediaTypeAttributeKeys.MajorType, MediaTypeGuids.Video);
mediaTypeIn.Set(MediaTypeAttributeKeys.Subtype, VideoFormatGuids.Rgb32);
mediaTypeIn.Set(MediaTypeAttributeKeys.FrameSize, MfWriter.PackLong(Width, Height));
mediaTypeIn.Set(MediaTypeAttributeKeys.DefaultStride, Width * 4);
mediaTypeIn.Set(MediaTypeAttributeKeys.FixedSizeSamples, 1);
mediaTypeIn.Set(MediaTypeAttributeKeys.SampleSize, Width * Height * 4);
_colorConverter.SetInputType(0, mediaTypeIn, 0);
}
var outputStride = Width * 12 / 8;
var outputSampleSize = Height * outputStride;
using (var mediaTypeOut = new MediaType())
{
mediaTypeOut.Set(MediaTypeAttributeKeys.MajorType, MediaTypeGuids.Video);
mediaTypeOut.Set(MediaTypeAttributeKeys.Subtype, VideoFormatGuids.NV12);
mediaTypeOut.Set(MediaTypeAttributeKeys.FrameSize, MfWriter.PackLong(Width, Height));
mediaTypeOut.Set(MediaTypeAttributeKeys.DefaultStride, outputStride);
mediaTypeOut.Set(MediaTypeAttributeKeys.FixedSizeSamples, 1);
mediaTypeOut.Set(MediaTypeAttributeKeys.SampleSize, outputSampleSize);
_colorConverter.SetOutputType(0, mediaTypeOut, 0);
}
_colorConverter.ProcessMessage(TMessageType.NotifyBeginStreaming, IntPtr.Zero);
_copyTexture = new Texture2D(Device, new Texture2DDescription
{
CpuAccessFlags = CpuAccessFlags.None,
BindFlags = BindFlags.RenderTarget | BindFlags.ShaderResource,
Format = Format.B8G8R8A8_UNorm,
Width = Width,
Height = Height,
OptionFlags = ResourceOptionFlags.None,
MipLevels = 1,
ArraySize = 1,
SampleDescription = { Count = 1, Quality = 0 },
Usage = ResourceUsage.Default
});
_inputSample = MediaFactory.CreateVideoSampleFromSurface(null);
// Create the media buffer from the texture
MediaFactory.CreateDXGISurfaceBuffer(typeof(Texture2D).GUID, _copyTexture, 0, false, out var inputBuffer);
using (var buffer2D = inputBuffer.QueryInterface <Buffer2D>())
inputBuffer.CurrentLength = buffer2D.ContiguousLength;
// Attach the created buffer to the sample
_inputSample.AddBuffer(inputBuffer);
}
