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[host] dxgi: improve frame signaling mechanics
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parent
969effedde
commit
cdc3384883
1 changed files with 10 additions and 8 deletions
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@ -26,6 +26,7 @@ Place, Suite 330, Boston, MA 02111-1307 USA
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#include "common/event.h"
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#include <assert.h>
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#include <stdatomic.h>
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#include <dxgi.h>
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#include <d3d11.h>
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#include <d3dcommon.h>
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@ -82,7 +83,7 @@ struct iface
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Texture * texture;
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int texRIndex;
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int texWIndex;
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volatile int texReady;
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atomic_int texReady;
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bool needsRelease;
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CaptureGetPointerBuffer getPointerBufferFn;
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@ -228,9 +229,9 @@ static bool dxgi_init()
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this->stop = false;
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this->texRIndex = 0;
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this->texWIndex = 0;
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this->texReady = 0;
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atomic_store(&this->texReady, 0);
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lgResetEvent(this->frameEvent );
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lgResetEvent(this->frameEvent);
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status = CreateDXGIFactory1(&IID_IDXGIFactory1, (void **)&this->factory);
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if (FAILED(status))
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@ -755,7 +756,7 @@ static CaptureResult dxgi_capture()
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// set the state, and signal
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tex->state = TEXTURE_STATE_PENDING_MAP;
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INTERLOCKED_INC(&this->texReady);
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if (atomic_fetch_add_explicit(&this->texReady, 1, memory_order_relaxed) == 0)
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lgSignalEvent(this->frameEvent);
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// advance the write index
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@ -852,12 +853,13 @@ static CaptureResult dxgi_waitFrame(CaptureFrame * frame)
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assert(this->initialized);
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// NOTE: the event may be signaled when there are no frames available
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if(this->texReady == 0)
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if(atomic_load_explicit(&this->texReady, memory_order_acquire) == 0)
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{
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if (!lgWaitEvent(this->frameEvent, 1000))
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return CAPTURE_RESULT_TIMEOUT;
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if (this->texReady == 0)
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// the count will still be zero if we are stopping
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if(atomic_load_explicit(&this->texReady, memory_order_acquire) == 0)
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return CAPTURE_RESULT_TIMEOUT;
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}
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@ -883,7 +885,7 @@ static CaptureResult dxgi_waitFrame(CaptureFrame * frame)
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frame->stride = this->stride;
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frame->format = this->format;
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INTERLOCKED_DEC(&this->texReady);
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atomic_fetch_sub_explicit(&this->texReady, 1, memory_order_release);
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return CAPTURE_RESULT_OK;
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}
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