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d3d11memory: Clear YUV texture with black color

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We prefer black color as an initial texture color and
Direct3D11 runtime will initialize texture with zeros (except for alpha)
which is fine for RGB formats. But UV components of YUV texture
requires manual clear for black color.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2502>
This commit is contained in:
Seungha Yang 2022-05-26 23:46:05 +09:00 committed by GStreamer Marge Bot
parent 3c5d3ae7ea
commit 0deb73d9ba
1 changed files with 61 additions and 1 deletions
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62
subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11memory.cpp
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@ -1436,13 +1436,39 @@ gst_d3d11_allocator_alloc_wrapped (GstD3D11Allocator * self,
return GST_MEMORY_CAST (mem);
}
typedef void (*GstD3D11ClearRTVFunc) (ID3D11DeviceContext * context_handle,
ID3D11RenderTargetView * rtv);
static void
clear_rtv_chroma (ID3D11DeviceContext * context_handle,
ID3D11RenderTargetView * rtv)
{
const FLOAT clear_color[4] = { 0.5f, 0.5f, 0.5f, 1.0f };
context_handle->ClearRenderTargetView (rtv, clear_color);
}
static void
clear_rtv_vuya (ID3D11DeviceContext * context_handle,
ID3D11RenderTargetView * rtv)
{
const FLOAT clear_color[4] = { 0.5f, 0.5f, 0.0f, 1.0f };
context_handle->ClearRenderTargetView (rtv, clear_color);
}
static GstMemory *
gst_d3d11_allocator_alloc_internal (GstD3D11Allocator * self,
GstD3D11Device * device, const D3D11_TEXTURE2D_DESC * desc)
{
ID3D11Texture2D *texture = NULL;
ID3D11Device *device_handle;
ID3D11DeviceContext *context_handle;
HRESULT hr;
GstMemory *mem;
GstD3D11Memory *dmem;
ID3D11RenderTargetView *rtv = nullptr;
GstD3D11ClearRTVFunc clear_func = nullptr;
device_handle = gst_d3d11_device_get_device_handle (device);
@ -1452,7 +1478,41 @@ gst_d3d11_allocator_alloc_internal (GstD3D11Allocator * self,
return NULL;
}
return gst_d3d11_allocator_alloc_wrapped (self, device, desc, texture);
mem = gst_d3d11_allocator_alloc_wrapped (self, device, desc, texture);
if (!mem)
return nullptr;
/* Clear with YUV black if needed and possible
* TODO: do this using UAV if RTV is not allowed (e.g., packed YUV formats) */
if ((desc->BindFlags & D3D11_BIND_RENDER_TARGET) == 0)
return mem;
dmem = GST_D3D11_MEMORY_CAST (mem);
switch (desc->Format) {
case DXGI_FORMAT_NV12:
case DXGI_FORMAT_P010:
case DXGI_FORMAT_P016:
/* Y component will be zero already */
rtv = gst_d3d11_memory_get_render_target_view (dmem, 1);
clear_func = (GstD3D11ClearRTVFunc) clear_rtv_chroma;
break;
case DXGI_FORMAT_AYUV:
rtv = gst_d3d11_memory_get_render_target_view (dmem, 0);
clear_func = (GstD3D11ClearRTVFunc) clear_rtv_vuya;
break;
default:
return mem;
}
if (!rtv)
return mem;
context_handle = gst_d3d11_device_get_device_context_handle (device);
gst_d3d11_device_lock (device);
clear_func (context_handle, rtv);
gst_d3d11_device_unlock (device);
return mem;
}
/**