#3504 nvjpeg decoder no longer leaks memory with latest drivers

setup.py

@@ -220,7 +220,7 @@ def has_header_file(name, isdir=False):
 csc_swscale_ENABLED     = DEFAULT and BITS==64 and pkg_config_ok("--exists", "libswscale")
 csc_cython_ENABLED      = DEFAULT
 nvjpeg_encoder_ENABLED = DEFAULT and not OSX and BITS==64 and pkg_config_ok("--exists", "nvjpeg")
-nvjpeg_decoder_ENABLED = False
+nvjpeg_decoder_ENABLED = nvjpeg_encoder_ENABLED
 nvenc_ENABLED = DEFAULT and not OSX and BITS==64 and pkg_config_version("10", "nvenc")
 nvfbc_ENABLED = DEFAULT and not OSX and not ARM and BITS==64 and pkg_config_ok("--exists", "nvfbc")
 cuda_kernels_ENABLED    = DEFAULT and not OSX

xpra/codecs/nvjpeg/decoder.pyx

@@ -255,9 +255,13 @@ def get_default_device():
 
 
 def selftest(full=False):
-    from xpra.codecs.nv_util import has_nvidia_hardware
+    from xpra.codecs.nvidia.nv_util import has_nvidia_hardware, get_nvidia_module_version
     if not has_nvidia_hardware():
         raise ImportError("no nvidia GPU device found")
+    mod_ver = get_nvidia_module_version()
+    if mod_ver<(522, 6):
+        vstr = ".".join(str(x) for x in mod_ver)
+        raise ImportError(f"nvidia module {vstr} is too old, version 522.6 or later is required")
     from xpra.codecs.codec_checks import TEST_PICTURES
     #options = {"cuda-device-context" : get_device_context()}
     for bdata in TEST_PICTURES["jpeg"]: