/// <summary>Builds the transcoder configuration from stream.</summary>
/// <param name="inStream">The in stream.</param>
/// <param name="inputCodecId">The input codec identifier.</param>
/// <param name="outputCodecId">The output codec identifier.</param>
/// <param name="implementation">The implementation.</param>
/// <param name="useOpaqueSurfaces">if set to <c>true</c> [use opaque surfaces].</param>
/// <returns></returns>
public static TranscoderConfiguration BuildTranscoderConfigurationFromStream(Stream inStream, CodecId inputCodecId, CodecId outputCodecId, mfxIMPL implementation = mfxIMPL.MFX_IMPL_AUTO, bool useOpaqueSurfaces = true)
{
TranscoderConfiguration config = new TranscoderConfiguration();
long oldposition = inStream.Position;
config.decParams = QuickSyncStatic.DecodeHeader(inStream, inputCodecId, implementation);
inStream.Position = oldposition;
//config.decParams.mfx.CodecId was set in last function
//config.encParams.mfx.CodecId will get set below in a func
int width = config.decParams.mfx.FrameInfo.CropW;
int height = config.decParams.mfx.FrameInfo.CropH;
config.vppParams = TranscoderSetupVPPParameters(width, height);
config.encParams = TranscoderSetupEncoderParameters(width, height, outputCodecId);
config.decParams.IOPattern = IOPattern.MFX_IOPATTERN_OUT_SYSTEM_MEMORY;
config.vppParams.IOPattern = IOPattern.MFX_IOPATTERN_IN_SYSTEM_MEMORY | IOPattern.MFX_IOPATTERN_OUT_SYSTEM_MEMORY;
config.encParams.IOPattern = IOPattern.MFX_IOPATTERN_IN_SYSTEM_MEMORY;
// Configure Media SDK to keep more operations in flight
// - AsyncDepth represents the number of tasks that can be submitted, before synchronizing is required
ushort asyncdepth = 4;
config.decParams.AsyncDepth = asyncdepth;
config.encParams.AsyncDepth = asyncdepth;
config.vppParams.AsyncDepth = asyncdepth;
return(config);
}
/// <summary>Reads the file header information.</summary>
/// <param name="codecId">The codec identifier.</param>
/// <param name="impl">The implementation.</param>
/// <param name="infs">The infs.</param>
/// <param name="outIOPattern">The out io pattern.</param>
/// <returns></returns>
public static unsafe mfxVideoParam ReadFileHeaderInfo(CodecId codecId, mfxIMPL impl, Stream infs, IOPattern outIOPattern)
{
long oldposition = infs.Position;
var buf = new byte[65536]; //avail after init
int n = infs.Read(buf, 0, buf.Length);
if (n < buf.Length)
{
Array.Resize(ref buf, n);
}
infs.Position = oldposition;
var decoderParameters = QuickSyncStatic.DecodeHeader(buf, codecId, impl);
decoderParameters.IOPattern = outIOPattern;
return(decoderParameters);
}
//static public IEnumerable<byte[]> DecodeStream(Stream s, FourCC fourcc = FourCC.NV12, AccelerationLevel acceleration = AccelerationLevel.BestAvailableAccelerationUseGPUorCPU)
//{
// return null;
//}
/// <summary>
/// Construct the decoder.
/// </summary>
/// <param name="stream">Stream be read from</param>
/// <param name="codecId">What format the bitstream is in: AVC, HEVC, MJPEG, ...</param>
/// <param name="impl">implementation to use</param>
/// <param name="outIOPattern">memory type for decoding</param>
public StreamDecoder(Stream stream, CodecId codecId, mfxIMPL impl = mfxIMPL.MFX_IMPL_AUTO, IOPattern outIOPattern = IOPattern.MFX_IOPATTERN_OUT_SYSTEM_MEMORY)
{
long oldposition = stream.Position;
var buf = new byte[65536]; //avail after init
int n = stream.Read(buf, 0, buf.Length);
if (n < buf.Length)
{
Array.Resize(ref buf, n);
}
stream.Position = oldposition;
this.decoderParameters = QuickSyncStatic.DecodeHeader(buf, codecId, impl);
this.decoderParameters.IOPattern = outIOPattern;
lowLevelDecoder = new LowLevelDecoder(decoderParameters, null, impl);
Init(stream);
}