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dxgi: cache shared handles instead of re-creating them

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This will cache up to 10 handles, in practice I have never seen DXGI
return anything but the same resource each time but we allow for more
anyway should MS change something in the future.

Should the cache get over filled it is disabled entirely and we revert
to the original behaviour.
This commit is contained in:
Geoffrey McRae 2022-01-19 08:00:03 +11:00
parent 04ae9217e8
commit cff64ee7d3
1 changed files with 56 additions and 13 deletions
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69
host/platform/Windows/capture/DXGI/src/d3d12.c
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@ -26,6 +26,7 @@
#include "common/debug.h"
#include "common/option.h"
#include "common/windebug.h"
#include "common/array.h"
#include "ods_capture.h"
#define ALIGN_TO(value, align) (((value) + (align) - 1) & -(align))
@ -52,6 +53,15 @@ struct D3D12Backend
UINT64 fenceValue;
ID3D12Fence * fence;
HANDLE event;
// shared handle cache
struct
{
ID3D11Texture2D * tex;
HANDLE handle;
}
handleCache[10];
int handleCacheCount;
};
static struct DXGIInterface * dxgi = NULL;
@ -289,6 +299,9 @@ static void d3d12_free(void)
if (this->src)
ID3D12Resource_Release(this->src);
for(int i = 0; i < this->handleCacheCount; ++i)
CloseHandle(this->handleCache[i].handle);
if (this->commandQueue)
ID3D12CommandQueue_Release(this->commandQueue);
@ -309,33 +322,63 @@ static bool d3d12_copyFrame(Texture * parent, ID3D11Texture2D * src)
if (this->copySleep > 0)
Sleep(this->copySleep);
status = ID3D11Texture2D_QueryInterface(src, &IID_IDXGIResource1, (void **)&res1);
if (FAILED(status))
HANDLE handle = INVALID_HANDLE_VALUE;
if (this->handleCacheCount > -1)
{
DEBUG_WINERROR("Failed to get IDXGIResource1 from texture", status);
return CAPTURE_RESULT_ERROR;
// see if there is a cached handle already available for this texture
for(int i = 0; i < this->handleCacheCount; ++i)
if (this->handleCache[i].tex == src)
{
handle = this->handleCache[i].handle;
break;
}
}
HANDLE handle;
status = IDXGIResource1_CreateSharedHandle(res1, NULL, DXGI_SHARED_RESOURCE_READ, NULL, &handle);
if (FAILED(status))
if (handle == INVALID_HANDLE_VALUE)
{
DEBUG_WINERROR("Failed to get create shared handle for texture", status);
fail = true;
goto cleanup;
status = ID3D11Texture2D_QueryInterface(src, &IID_IDXGIResource1, (void **)&res1);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to get IDXGIResource1 from texture", status);
return CAPTURE_RESULT_ERROR;
}
status = IDXGIResource1_CreateSharedHandle(res1, NULL, DXGI_SHARED_RESOURCE_READ, NULL, &handle);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to get create shared handle for texture", status);
fail = true;
goto cleanup;
}
// store the handle for later use
if (this->handleCacheCount < ARRAY_LENGTH(this->handleCache))
{
this->handleCache[this->handleCacheCount].tex = src;
this->handleCache[this->handleCacheCount].handle = handle;
++this->handleCacheCount;
}
else
{
// too many handles to cache, disable the cache entirely
for(int i = 0; i < this->handleCacheCount; ++i)
CloseHandle(this->handleCache[i].handle);
this->handleCacheCount = -1;
}
}
status = ID3D12Device_OpenSharedHandle(this->device, handle, &IID_ID3D12Resource, (void **)&this->src);
if (this->handleCacheCount == -1)
CloseHandle(handle);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to get create shared handle for texture", status);
CloseHandle(handle);
fail = true;
goto cleanup;
}
CloseHandle(handle);
D3D12_TEXTURE_COPY_LOCATION srcLoc = {
.pResource = this->src,
.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX,