vdpau: simplify surface copy when deinterlacing

modules/hw/vdpau/deinterlace.c

@@ -45,9 +45,9 @@ static picture_t *Deinterlace(filter_t *filter, picture_t *src)
     vlc_vdp_video_field_t *f1 = src->context;
     if (unlikely(f1 == NULL))
         return src;
-
     if (f1->structure != VDP_VIDEO_MIXER_PICTURE_STRUCTURE_FRAME)
         return src; /* cannot deinterlace twice */
+
 #ifdef VOUT_CORE_GETS_A_CLUE
     picture_t *dst = filter_NewPicture(filter);
 #else
@@ -55,12 +55,16 @@ static picture_t *Deinterlace(filter_t *filter, picture_t *src)
 #endif
     if (dst == NULL)
         return src; /* cannot deinterlace without copying fields */
-    if (vlc_vdp_video_copy(dst, src) != VDP_STATUS_OK) // shallow copy
+
+    vlc_vdp_video_field_t *f2 = vlc_vdp_video_copy(f1); // shallow copy
+    if (unlikely(f2 == NULL))
     {
         picture_Release(dst);
         return src;
     }
+
     picture_CopyProperties(dst, src);
+    dst->context = f2;
 
     if (last_pts != VLC_TS_INVALID)
         dst->date = (3 * src->date - last_pts) / 2;
@@ -75,7 +79,6 @@ static picture_t *Deinterlace(filter_t *filter, picture_t *src)
     assert(src->p_next == NULL);
     src->p_next = dst;
 
-    vlc_vdp_video_field_t *f2 = dst->context;
     if (src->b_progressive || src->b_top_field_first)
     {
         f1->structure = VDP_VIDEO_MIXER_PICTURE_STRUCTURE_TOP_FIELD;

modules/hw/vdpau/picture.c

@@ -94,21 +94,12 @@ VdpStatus vlc_vdp_video_attach(vdp_t *vdp, VdpVideoSurface surface,
     return VDP_STATUS_OK;
 }
 
-VdpStatus vlc_vdp_video_copy(picture_t *restrict dst, picture_t *restrict src)
+vlc_vdp_video_field_t *vlc_vdp_video_copy(vlc_vdp_video_field_t *fold)
 {
-    vlc_vdp_video_field_t *fold = src->context;
     vlc_vdp_video_frame_t *frame = fold->frame;
     vlc_vdp_video_field_t *fnew = malloc(sizeof (*fnew));
     if (unlikely(fnew == NULL))
-        return VDP_STATUS_RESOURCES;
-
-    assert(src->format.i_chroma == VLC_CODEC_VDPAU_VIDEO_420
-        || src->format.i_chroma == VLC_CODEC_VDPAU_VIDEO_422);
-    assert(dst->format.i_chroma == VLC_CODEC_VDPAU_VIDEO_420
-        || dst->format.i_chroma == VLC_CODEC_VDPAU_VIDEO_422);
-    assert(!picture_IsReferenced(dst));
-    assert(dst->context == NULL);
-    dst->context = fnew;
+        return NULL;
 
     fnew->destroy = SurfaceDestroy;
     fnew->frame = frame;
@@ -117,7 +108,7 @@ VdpStatus vlc_vdp_video_copy(picture_t *restrict dst, picture_t *restrict src)
     fnew->sharpen = fold->sharpen;
 
     atomic_fetch_add(&frame->refs, 1);
-    return VDP_STATUS_OK;
+    return fnew;
 }
 
 vlc_vdp_video_field_t *vlc_vdp_video_detach(picture_t *pic)

modules/hw/vdpau/vlc_vdpau.h

@@ -271,9 +271,10 @@ typedef struct vlc_vdp_video_field
 VdpStatus vlc_vdp_video_attach(vdp_t *, VdpVideoSurface, picture_t *);
 
 /**
- * Copies the VDPAU video surface from a VLC picture into another VLC picture.
+ * Performs a shallow copy of a VDPAU video surface context
+ * (the underlying VDPAU video surface is shared).
  */
-VdpStatus vlc_vdp_video_copy(picture_t *dst, picture_t *src);
+vlc_vdp_video_field_t *vlc_vdp_video_copy(vlc_vdp_video_field_t *);
 
 /**
  * Detaches a VDPAU video surface as context from a VLC picture.