NVEnc: Check SDK version and disable feature if driver is too old. Prevent re-checks by caching result.

1 files changed, 15 insertions, 0 deletions

diff --git a/libhb/nvenc_common.c b/libhb/nvenc_common.c
index 15d839e2d..538ea4f39 100644
--- a/libhb/nvenc_common.c
+++ b/libhb/nvenc_common.c
@@ -35,6 +35,7 @@ int hb_nvenc_h265_available()
     #endif 
 }
 
+static int isAvailable = -1;
 int hb_check_nvenc_available() 
 {
     if (is_hardware_disabled())
@@ -42,6 +43,10 @@ int hb_check_nvenc_available()
         return 0;
     } 
     
+    if (isAvailable != -1){
+        return isAvailable;
+    }
+    
     #if HB_PROJECT_FEATURE_NVENC
         uint32_t nvenc_ver;
         void *context = NULL;
@@ -49,15 +54,25 @@ int hb_check_nvenc_available()
 
         int loadErr = nvenc_load_functions(&nvenc_dl, context);
         if (loadErr < 0) {
+            isAvailable = 0;
             return 0;
         }
   
         NVENCSTATUS apiErr = nvenc_dl->NvEncodeAPIGetMaxSupportedVersion(&nvenc_ver);
         if (apiErr != NV_ENC_SUCCESS)
         {
+            isAvailable = 0;
+            return 0;
+        }
+        
+        hb_log("Nvenc version %d.%d\n", nvenc_ver >> 4, nvenc_ver & 0xf);
+        if ((NVENCAPI_MAJOR_VERSION << 4 | NVENCAPI_MINOR_VERSION) > nvenc_ver) {
+            hb_log("NVENC version not supported. Disabling feature.");
+            isAvailable = 0;
             return 0;
         }
 
+        isAvailable = 1;
         return 1;
     #else
         return 0;