libobs-d3d11: Fix rebuild of NV12 textures

When NV12 textures were added, driver crashes and their rebuild process
was not taken in to consideration.  This fixes that by adding explicit
NV12 rebuild functions.

libobs-d3d11/d3d11-rebuild.cpp

@@ -91,6 +91,40 @@ void gs_texture_2d::Rebuild(ID3D11Device *dev)
 	}
 }
 
+void gs_texture_2d::RebuildNV12_Y(ID3D11Device *dev)
+{
+	gs_texture_2d *tex_uv = pairedNV12texture;
+	HRESULT hr;
+
+	hr = dev->CreateTexture2D(&td, nullptr, &texture);
+	if (FAILED(hr))
+		throw HRError("Failed to create 2D texture", hr);
+
+	hr = dev->CreateShaderResourceView(texture, &resourceDesc, &shaderRes);
+	if (FAILED(hr))
+		throw HRError("Failed to create resource view", hr);
+
+	if (isRenderTarget)
+		InitRenderTargets();
+
+	tex_uv->RebuildNV12_UV(dev);
+}
+
+void gs_texture_2d::RebuildNV12_UV(ID3D11Device *dev)
+{
+	gs_texture_2d *tex_y = pairedNV12texture;
+	HRESULT hr;
+
+	texture = tex_y->texture;
+
+	hr = dev->CreateShaderResourceView(texture, &resourceDesc, &shaderRes);
+	if (FAILED(hr))
+		throw HRError("Failed to create resource view", hr);
+
+	if (isRenderTarget)
+		InitRenderTargets();
+}
+
 void gs_zstencil_buffer::Rebuild(ID3D11Device *dev)
 {
 	HRESULT hr;
@@ -287,7 +321,14 @@ try {
 			((gs_index_buffer*)obj)->Rebuild(dev);
 			break;
 		case gs_type::gs_texture_2d:
-			((gs_texture_2d*)obj)->Rebuild(dev);
+			{
+				gs_texture_2d *tex = (gs_texture_2d*)obj;
+				if (!tex->nv12) {
+					tex->Rebuild(dev);
+				} else if (!tex->chroma) {
+					tex->RebuildNV12_Y(dev);
+				}
+			}
 			break;
 		case gs_type::gs_zstencil_buffer:
 			((gs_zstencil_buffer*)obj)->Rebuild(dev);

libobs-d3d11/d3d11-subsystem.hpp

@@ -371,6 +371,8 @@ struct gs_texture_2d : gs_texture {
 
 	void RebuildSharedTextureFallback();
 	void Rebuild(ID3D11Device *dev);
+	void RebuildNV12_Y(ID3D11Device *dev);
+	void RebuildNV12_UV(ID3D11Device *dev);
 
 	inline void Release()
 	{