avutil/hwcontext_cuda: add CUstream in cuda hwctx

configure

@@ -5887,8 +5887,10 @@ check_type "va/va.h va/va_enc_vp9.h"  "VAEncPictureParameterBufferVP9"
 check_type "vdpau/vdpau.h" "VdpPictureInfoHEVC"
 
 if ! disabled ffnvcodec; then
-    check_pkg_config ffnvcodec "ffnvcodec >= 8.0.14.1" \
-        "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" ""
+    check_pkg_config ffnvcodec "ffnvcodec >= 8.1.24.2" \
+          "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" "" || \
+        { test_pkg_config ffnvcodec_tmp "ffnvcodec < 8.1" "" "" && check_pkg_config ffnvcodec "ffnvcodec >= 8.0.14.2" \
+          "ffnvcodec/nvEncodeAPI.h ffnvcodec/dynlink_cuda.h ffnvcodec/dynlink_cuviddec.h ffnvcodec/dynlink_nvcuvid.h" ""; }
 fi
 
 check_cpp_condition winrt windows.h "!WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)"

doc/APIchanges

@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2018-05-xx - xxxxxxxxxx - lavu 56.18.101 - hwcontext_cuda.h
+  Add AVCUDADeviceContext.stream.
+
 2018-04-xx - xxxxxxxxxx - lavu 56.18.100 - pixdesc.h
   Add AV_PIX_FMT_FLAG_ALPHA to AV_PIX_FMT_PAL8.
 

libavutil/hwcontext_cuda.c

@@ -386,6 +386,9 @@ static int cuda_device_create(AVHWDeviceContext *ctx, const char *device,
         goto error;
     }
 
+    // Setting stream to NULL will make functions automatically use the default CUstream
+    hwctx->stream = NULL;
+
     cu->cuCtxPopCurrent(&dummy);
 
     hwctx->internal->is_allocated = 1;

libavutil/hwcontext_cuda.h

@@ -41,6 +41,7 @@ typedef struct AVCUDADeviceContextInternal AVCUDADeviceContextInternal;
  */
 typedef struct AVCUDADeviceContext {
     CUcontext cuda_ctx;
+    CUstream stream;
     AVCUDADeviceContextInternal *internal;
 } AVCUDADeviceContext;
 

libavutil/version.h

@@ -80,7 +80,7 @@
 
 #define LIBAVUTIL_VERSION_MAJOR  56
 #define LIBAVUTIL_VERSION_MINOR  18
-#define LIBAVUTIL_VERSION_MICRO 100
+#define LIBAVUTIL_VERSION_MICRO 101
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \