dxva2: allow an empty array of ID3D11VideoDecoderOutputView

We can pick the correct slice index directly from the ID3D11VideoDecoderOutputView
casted from data[3].

Also added myself as maintainer for DXVA2 and D3D11VA.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

MAINTAINERS

@@ -260,7 +260,8 @@ Codecs:
 
 Hardware acceleration:
   crystalhd.c                           Philip Langdale
-  dxva2*                                Hendrik Leppkes, Laurent Aimar
+  dxva2*                                Hendrik Leppkes, Laurent Aimar, Steve Lhomme
+  d3d11va*                              Steve Lhomme
   mediacodec*                           Matthieu Bouron
   vaapi*                                Gwenole Beauchesne
   vaapi_encode*                         Mark Thompson

libavcodec/dxva2_internal.h

@@ -78,7 +78,7 @@ typedef union {
 #define DXVA_CONTEXT_CFG_RESIDACCEL(avctx, ctx) (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD ? ctx->d3d11va.cfg->ConfigResidDiffAccelerator : ctx->dxva2.cfg->ConfigResidDiffAccelerator)
 #define DXVA_CONTEXT_VALID(avctx, ctx)          (DXVA_CONTEXT_DECODER(avctx, ctx) && \
                                                  DXVA_CONTEXT_CFG(avctx, ctx) && \
-                                                 DXVA_CONTEXT_COUNT(avctx, ctx))
+                                                 (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD || ctx->dxva2.surface_count))
 #elif CONFIG_DXVA2
 #define DXVA_CONTEXT_WORKAROUND(avctx, ctx)     (ctx->dxva2.workaround)
 #define DXVA_CONTEXT_COUNT(avctx, ctx)          (ctx->dxva2.surface_count)
@@ -98,7 +98,7 @@ typedef union {
 #define DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx)  (ctx->d3d11va.cfg->ConfigBitstreamRaw)
 #define DXVA_CONTEXT_CFG_INTRARESID(avctx, ctx) (ctx->d3d11va.cfg->ConfigIntraResidUnsigned)
 #define DXVA_CONTEXT_CFG_RESIDACCEL(avctx, ctx) (ctx->d3d11va.cfg->ConfigResidDiffAccelerator)
-#define DXVA_CONTEXT_VALID(avctx, ctx)          (ctx->d3d11va.decoder && ctx->d3d11va.cfg && ctx->d3d11va.surface_count)
+#define DXVA_CONTEXT_VALID(avctx, ctx)          (ctx->d3d11va.decoder && ctx->d3d11va.cfg)
 #endif
 
 unsigned ff_dxva2_get_surface_index(const AVCodecContext *avctx,

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR  72
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \