internal DirectXResource Render(DirectXContext dx, VideoFilterChainDescriptor filterChain, DeviceContext ctx, DirectXResource texture)
{
DirectXResource current = texture;
try
{
if (dx != _dx || !Equals(filterChain, _filterChain))
{
TearDown();
_dx = dx;
_filterChain = filterChain;
Setup(dx, filterChain);
}
foreach (var stage in _stages)
{
var next = stage.Render(ctx, current);
if (current != next && current != texture)
{
dx.Pool.Back(current);
}
current = next;
dx.Flush(ctx, "Filter stage");
}
}
catch (SharpDXException e)
{
_dx.Broken(e);
}
return(current);
}
public static FilterPixelFormat GetFilterPixelFormat(VideoFilterChainDescriptor chain)
{
if (chain == null || chain.Filters == null || chain.Filters.Length == 0)
{
return(FilterPixelFormat.NoFilter);
}
var last = chain.Filters[chain.Filters.Length - 1].Type;
switch (last)
{
case VideoFilterType.Warm:
case VideoFilterType.Cold:
case VideoFilterType.Dark:
case VideoFilterType.Light:
case VideoFilterType.Vintage:
case VideoFilterType.Sepia:
return(FilterPixelFormat.Rgb);
case VideoFilterType.Grayscale:
case VideoFilterType.Contrast:
case VideoFilterType.Brightness:
case VideoFilterType.Saturation:
case VideoFilterType.Gamma:
return(FilterPixelFormat.Yuv);
default:
return(FilterPixelFormat.NoFilter);
}
}
public static string GetFFMpegFilterString(VideoFilterChainDescriptor filterChain)
{
if (filterChain != null)
{
var res = string.Join(",", filterChain.Filters.Select(s => GetFFMpegFilterString(s)).Concat(new[] { GetEqFFMpegFilterString(filterChain.Filters) }).Where(s => s != null));
if (!string.IsNullOrWhiteSpace(res))
{
return(res);
}
}
return("null");
}
public RefCounted <DirectXResource> Render(DirectXContext dx, VideoFilterChainDescriptor filterChain, DeviceContext ctx, RefCounted <DirectXResource> input)
{
var res = Render(dx, filterChain, ctx, input.Instance);
if (ReferenceEquals(res, input.Instance))
{
return(input.AddRef());
}
else
{
return(new RefCounted <DirectXResource>(res));
}
}
private void Setup(DirectXContext dx, VideoFilterChainDescriptor filterChain)
{
if (filterChain != null)
{
foreach (var chain in filterChain.Filters)
{
var stage = Create(chain);
if (stage != null)
{
_stages.Add(stage);
}
}
}
}
