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[c-host] rework events

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This commit is contained in:
Geoffrey McRae
2019-03-04 15:03:11 +11:00
parent a8b018d5da
commit 6f545483c9
2 changed files with 84 additions and 101 deletions
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96
c-host/windows/capture/dxgi.c
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@@ -32,17 +32,21 @@ Place, Suite 330, Boston, MA 02111-1307 USA
// locals
struct iface
{
bool initialized;
IDXGIFactory1 * factory;
IDXGIAdapter1 * adapter;
IDXGIOutput * output;
ID3D11Device * device;
ID3D11DeviceContext * deviceContext;
D3D_FEATURE_LEVEL featureLevel;
IDXGIOutputDuplication * dup;
ID3D11Texture2D * texture;
bool needsRelease;
osEventHandle * copyEvent;
bool initialized;
IDXGIFactory1 * factory;
IDXGIAdapter1 * adapter;
IDXGIOutput * output;
ID3D11Device * device;
ID3D11DeviceContext * deviceContext;
D3D_FEATURE_LEVEL featureLevel;
IDXGIOutputDuplication * dup;
ID3D11Texture2D * texture;
D3D11_MAPPED_SUBRESOURCE mapping;
bool needsRelease;
bool needsUnmap;
osEventHandle * copyEvent;
osEventHandle * frameEvent;
osEventHandle * pointerEvent;
unsigned int width;
unsigned int height;
@@ -84,6 +88,25 @@ static bool dxgi_create()
return false;
}
this->frameEvent = os_createEvent(true);
if (!this->frameEvent)
{
DEBUG_ERROR("failed to create the frame event");
os_freeEvent(this->copyEvent);
free(this);
return false;
}
this->pointerEvent = os_createEvent(true);
if (!this->pointerEvent)
{
DEBUG_ERROR("failed to create the pointer event");
os_freeEvent(this->copyEvent );
os_freeEvent(this->frameEvent);
free(this);
return false;
}
return true;
}
@@ -364,6 +387,12 @@ static bool dxgi_deinit()
{
assert(this);
if (this->needsUnmap)
{
ID3D11DeviceContext_Unmap(this->deviceContext, (ID3D11Resource*)this->texture, 0);
this->needsUnmap = false;
}
if (this->texture)
{
ID3D11Texture2D_Release(this->texture);
@@ -424,7 +453,9 @@ static void dxgi_free()
if (this->initialized)
dxgi_deinit();
os_freeEvent(this->copyEvent);
os_freeEvent(this->copyEvent );
os_freeEvent(this->frameEvent );
os_freeEvent(this->pointerEvent);
free(this);
this = NULL;
@@ -482,18 +513,40 @@ static CaptureResult dxgi_capture(bool * hasFrameUpdate, bool * hasPointerUpdate
return CAPTURE_RESULT_ERROR;
}
// wait for the prior copy to finish in getFrame
// wait for the prior copy to finish in getFrame and unmap
os_waitEvent(this->copyEvent);
if (this->needsUnmap)
{
ID3D11DeviceContext_Unmap(this->deviceContext, (ID3D11Resource*)this->texture, 0);
this->needsUnmap = false;
}
// issue the copy from GPU to CPU RAM
ID3D11DeviceContext_CopyResource(this->deviceContext,
(ID3D11Resource *)this->texture, (ID3D11Resource *)src);
// map the resource (this must be done here as ID3D11DeviceContext is not thread safe)
status = ID3D11DeviceContext_Map(this->deviceContext, (ID3D11Resource*)this->texture, 0, D3D11_MAP_READ, 0, &this->mapping);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to map the texture", status);
IDXGIResource_Release(res);
return CAPTURE_RESULT_ERROR;
}
this->needsUnmap = true;
// signal that a frame is available
os_signalEvent(this->frameEvent);
ID3D11Texture2D_Release(src);
*hasFrameUpdate = true;
}
if (frameInfo.PointerShapeBufferSize > 0)
{
os_signalEvent(this->pointerEvent);
*hasPointerUpdate = true;
}
IDXGIResource_Release(res);
return CAPTURE_RESULT_OK;
@@ -504,24 +557,21 @@ static bool dxgi_getFrame(CaptureFrame * frame)
assert(this);
assert(this->initialized);
if (!os_waitEvent(this->frameEvent))
{
DEBUG_ERROR("Failed to wait on the frame event");
return false;
}
frame->width = this->width;
frame->height = this->height;
frame->pitch = this->pitch;
frame->stride = this->stride;
frame->format = this->format;
HRESULT status;
D3D11_MAPPED_SUBRESOURCE mapping;
status = ID3D11DeviceContext_Map(this->deviceContext, (ID3D11Resource*)this->texture, 0, D3D11_MAP_READ, 0, &mapping);
if (FAILED(status))
{
DEBUG_WINERROR("Failed to map the texture", status);
return false;
}
memcpy(frame->data, mapping.pData, this->pitch * this->height);
memcpy(frame->data, this->mapping.pData, this->pitch * this->height);
ID3D11DeviceContext_Unmap(this->deviceContext, (ID3D11Resource*)this->texture, 0);
os_signalEvent(this->copyEvent);
return true;
}