vdpau: add vlc_vdp_video_destroy() and simplify

modules/hw/vdpau/avcodec.c

@@ -70,12 +70,6 @@ static vlc_vdp_video_field_t *CreateSurface(vlc_va_t *va)
     return field;
 }
 
-static void DestroySurface(vlc_vdp_video_field_t *field)
-{
-    assert(field != NULL);
-    field->context.destroy(&field->context);
-}
-
 static vlc_vdp_video_field_t *GetSurface(vlc_va_t *va)
 {
     vlc_va_sys_t *sys = va->sys;
@@ -195,7 +189,7 @@ static int Open(vlc_va_t *va, AVCodecContext *avctx, enum PixelFormat pix_fmt,
     {
         msg_Err(va, "not enough video RAM");
         while (i > 0)
-            DestroySurface(sys->pool[--i]);
+            vlc_vdp_video_destroy(sys->pool[--i]);
         goto error;
     }
 
@@ -224,7 +218,7 @@ static void Close(vlc_va_t *va, AVCodecContext *avctx)
     vlc_va_sys_t *sys = va->sys;
 
     for (unsigned i = 0; sys->pool[i] != NULL; i++)
-        DestroySurface(sys->pool[i]);
+        vlc_vdp_video_destroy(sys->pool[i]);
     vdp_release_x11(sys->vdp);
     av_freep(&avctx->hwaccel_context);
     free(sys);

modules/hw/vdpau/chroma.c

@@ -290,8 +290,7 @@ static void Flush(filter_t *filter)
     for (unsigned i = 0; i < MAX_PAST + MAX_FUTURE; i++)
         if (sys->history[i].field != NULL)
         {
-            sys->history[i].field->context.destroy(
-                &sys->history[i].field->context);
+            vlc_vdp_video_destroy(sys->history[i].field);
             sys->history[i].field = NULL;
         }
 }
@@ -503,7 +502,7 @@ static picture_t *Render(filter_t *filter, picture_t *src, bool import)
         {
             f = sys->history[0].field;
             if (f != NULL)
-                f->context.destroy(&f->context);
+                vlc_vdp_video_destroy(f);
 
             memmove(sys->history, sys->history + 1,
                     sizeof (sys->history[0]) * (MAX_PAST + MAX_FUTURE));
@@ -680,7 +679,7 @@ static picture_t *Render(filter_t *filter, picture_t *src, bool import)
 skip:
     f = sys->history[0].field;
     if (f != NULL)
-        f->context.destroy(&f->context); /* Release oldest field */
+        vlc_vdp_video_destroy(f); /* Release oldest field */
     memmove(sys->history, sys->history + 1, /* Advance history */
             sizeof (sys->history[0]) * (MAX_PAST + MAX_FUTURE));
 

modules/hw/vdpau/vlc_vdpau.h

@@ -290,6 +290,11 @@ VdpStatus vlc_vdp_video_attach(vdp_t *, VdpVideoSurface, picture_t *);
  */
 vlc_vdp_video_field_t *vlc_vdp_video_create(vdp_t *, VdpVideoSurface);
 
+static inline void vlc_vdp_video_destroy(vlc_vdp_video_field_t *f)
+{
+    return f->context.destroy(&f->context);
+}
+
 /**
  * Performs a shallow copy of a VDPAU video surface context
  * (the underlying VDPAU video surface is shared).