From: Steve Lhomme <robux4@gmail.com>
Date: Fri, 13 Jan 2017 13:01:06 +0000 (+0100)
Subject: dxva2: get the slice number directly from the surface in D3D11VA
X-Git-Tag: n3.4-dev~1428
X-Git-Url: http://git.ffmpeg.org/gitweb/ffmpeg.git/commitdiff_plain/153b36fc62849e0e1540a43829794e0503994ebb

dxva2: get the slice number directly from the surface in D3D11VA

No need to loop through the known surfaces, we'll use the requested surface
anyway.

The loop is only done for DXVA2.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---

diff --git a/libavcodec/dxva2.c b/libavcodec/dxva2.c
index 2ac3f3e..c782f1c 100644
--- a/libavcodec/dxva2.c
+++ b/libavcodec/dxva2.c
@@ -41,20 +41,19 @@ unsigned ff_dxva2_get_surface_index(const AVCodecContext *avctx,
     void *surface = get_surface(frame);
     unsigned i;
 
-    for (i = 0; i < DXVA_CONTEXT_COUNT(avctx, ctx); i++) {
 #if CONFIG_D3D11VA
-        if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD && ctx->d3d11va.surface[i] == surface)
-        {
-            D3D11_VIDEO_DECODER_OUTPUT_VIEW_DESC viewDesc;
-            ID3D11VideoDecoderOutputView_GetDesc(ctx->d3d11va.surface[i], &viewDesc);
-            return viewDesc.Texture2D.ArraySlice;
-        }
+    if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
+        D3D11_VIDEO_DECODER_OUTPUT_VIEW_DESC viewDesc;
+        ID3D11VideoDecoderOutputView_GetDesc((ID3D11VideoDecoderOutputView*) surface, &viewDesc);
+        return viewDesc.Texture2D.ArraySlice;
+    }
 #endif
 #if CONFIG_DXVA2
+    for (i = 0; i < DXVA_CONTEXT_COUNT(avctx, ctx); i++) {
         if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD && ctx->dxva2.surface[i] == surface)
             return i;
-#endif
     }
+#endif
 
     assert(0);
     return 0;