nvenc: Use gpointer instead of void*

just convention

sys/nvcodec/gstnvbaseenc.c

@@ -835,7 +835,7 @@ gst_nv_base_enc_bitstream_thread (gpointer user_data)
     }
 
     for (i = 0; i < state->n_buffers; i++) {
-      void *in_buf = state->in_bufs[i];
+      gpointer in_buf = state->in_bufs[i];
       g_assert (in_buf != NULL);
 
 #if HAVE_NVENC_GST_GL
@@ -1615,8 +1615,8 @@ _acquire_input_buffer (GstNvBaseEnc * nvenc, gpointer * input)
 
 static GstFlowReturn
 _submit_input_buffer (GstNvBaseEnc * nvenc, GstVideoCodecFrame * frame,
-    GstVideoFrame * vframe, void *inputBuffer, void *inputBufferPtr,
-    NV_ENC_BUFFER_FORMAT bufferFormat, void *outputBufferPtr)
+    GstVideoFrame * vframe, gpointer inputBuffer, gpointer inputBufferPtr,
+    NV_ENC_BUFFER_FORMAT bufferFormat, gpointer outputBufferPtr)
 {
   GstNvBaseEncClass *nvenc_class = GST_NV_BASE_ENC_GET_CLASS (nvenc);
   NV_ENC_PIC_PARAMS pic_params = { 0, };

sys/nvcodec/gstnvbaseenc.h

@@ -73,7 +73,7 @@ typedef struct {
   gint            gop_size;
 
   GstCudaContext * cuda_ctx;
-  void          * encoder;
+  gpointer        encoder;
 
   /* the supported input formats */
   GValue        * input_formats;                  /* OBJECT LOCK */
@@ -103,8 +103,8 @@ typedef struct {
    * 0 = none, 1 = fields, 2 = interleaved */
   gint            interlace_modes;
 
-  void           *display;            /* GstGLDisplay */
-  void           *other_context;      /* GstGLContext */
+  gpointer        display;            /* GstGLDisplay */
+  gpointer        other_context;      /* GstGLContext */
 
   /* the maximum buffer size the encoder is configured for */
   guint               max_encode_width;