ErsatzTV/ErsatzTV.FFmpeg/Filter/HardwareDownloadFilter.cs

using ErsatzTV.FFmpeg.Format;

namespace ErsatzTV.FFmpeg.Filter;

public class HardwareDownloadFilter : BaseFilter
{
    private readonly FrameState _currentState;

    public HardwareDownloadFilter(FrameState currentState)
    {
        _currentState = currentState;
    }

    public override FrameState NextState(FrameState currentState) =>
        currentState with { FrameDataLocation = FrameDataLocation.Software };

    public override string Filter
    {
        get
        {
            string hwdownload = string.Empty;
            if (_currentState.FrameDataLocation == FrameDataLocation.Hardware)
            {
                hwdownload = "hwdownload";
                foreach (IPixelFormat pixelFormat in _currentState.PixelFormat)
                {
                    if (!string.IsNullOrWhiteSpace(pixelFormat.FFmpegName))
                    {
                        hwdownload = $"hwdownload,format={pixelFormat.FFmpegName}";
                    }
                }
            }

            return hwdownload;
        }
    }
}