using ErsatzTV.FFmpeg.Format;

namespace ErsatzTV.FFmpeg.Decoder;

// VA-API-accelerated decode that downloads frames to system memory (no
// -hwaccel_output_format). Pairs with `-hwaccel vaapi` from
// QsvHardwareAccelerationOption on the "prefer native decoder" QSV path: the
// error-tolerant VA-API decoder feeds software frames into the QSV builder's
// format=nv12,hwupload,vpp_qsv branch, which re-uploads for the QSV encoder.
public class DecoderVaapiToSoftware : DecoderBase
{
    protected override FrameDataLocation OutputFrameDataLocation => FrameDataLocation.Software;

    public override string Name => "implicit_vaapi";

    // no -c:v (implicit decoder; `-hwaccel vaapi` drives VA-API) and no
    // -hwaccel_output_format (frames download to software)
    public override string[] InputOptions(InputFile inputFile) => [];
}