From dc5fcced233ac4c9f2d644cbfc246644a095f673 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Tue, 26 Sep 2017 23:20:08 +0200
Subject: [PATCH] vd_lavc: cuda requires setting hw_device_ctx

This restores cuda/cuvid under Windows.

Cuvid is relatively useless under Windows, but this was requested.
---
 video/decode/vd_lavc.c    | 2 +-
 waftools/fragments/cuda.c | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index 5d3f77b746..ae79554edd 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -593,7 +593,7 @@ static void init_avctx(struct dec_video *vd, const char *decoder,
             if (ctx->hwdec_dev->restore_device)
                 ctx->hwdec_dev->restore_device(ctx->hwdec_dev);
             if (!ctx->hwdec->set_hwframes) {
-#if HAVE_VDPAU_HWACCEL
+#if HAVE_VDPAU_HWACCEL || HAVE_CUDA_HWACCEL
                 avctx->hw_device_ctx = av_buffer_ref(ctx->hwdec_dev->av_device_ref);
 #else
                 goto error;
diff --git a/waftools/fragments/cuda.c b/waftools/fragments/cuda.c
index c63ec2945d..1d534f62d3 100644
--- a/waftools/fragments/cuda.c
+++ b/waftools/fragments/cuda.c
@@ -2,11 +2,14 @@
 
 typedef void * CUcontext;
 
+#include <libavcodec/avcodec.h>
 #include <libavutil/hwcontext.h>
 #include <libavutil/hwcontext_cuda.h>
 
 int main(int argc, char *argv[]) {
     enum AVHWDeviceType type = AV_HWDEVICE_TYPE_CUDA;
     AVCUDADeviceContextInternal *foo;
+    AVCodecContext *avctx = avcodec_alloc_context3(NULL);
+    avctx->hw_device_ctx = NULL;
     return 0;
 }