video/filter: change filter API, use refcounting, remove filter DR

Change the entire filter API to use reference counted images instead
of vf_get_image().

Remove filter "direct rendering". This was useful for vf_expand and (in
rare cases) vf_sub: DR allowed these filters to pass a cropped image to
the filters before them. Then, on filtering, the image was "uncropped",
so that black bars could be added around the image without copying. This
means that in some cases, vf_expand will be slower (-vf gradfun,expand
for example).

Note that another form of DR used for in-place filters has been replaced
by simpler logic. Instead of trying to do DR, filters can check if the
image is writeable (with mp_image_is_writeable()), and do true in-place
if that's the case. This affects filters like vf_gradfun and vf_sub.

Everything has to support strides now. If something doesn't, making a
copy of the image data is required.

1 files changed, 9 insertions, 14 deletions

diff --git a/video/filter/vf_rotate.c b/video/filter/vf_rotate.c
index 8994cf4588..1ef6bf2300 100644
--- a/video/filter/vf_rotate.c
+++ b/video/filter/vf_rotate.c
@@ -74,22 +74,16 @@ static int config(struct vf_instance *vf,
     if (vf->priv->direction & 4) {
 	if (width<height) vf->priv->direction&=3;
     }
-    if (vf->priv->direction & 4){
-	vf->put_image=vf_next_put_image; // passthru mode!
-/* FIXME: this should be in an other procedure in vf.c; that should always check
-     whether the filter after the passthrough one still (not)supports slices */
-	return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
-    }
     return vf_next_config(vf,height,width,d_height,d_width,flags,outfmt);
 }
 
-static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
-    mp_image_t *dmpi;
+static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
+{
+    if (vf->priv->direction & 4)
+        return mpi;
 
-    // hope we'll get DR buffer:
-    dmpi=vf_get_image(vf->next,mpi->imgfmt,
-	MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
-	mpi->h, mpi->w);
+    struct mp_image *dmpi = vf_alloc_out_image(vf);
+    mp_image_copy_attributes(dmpi, mpi);
 
     if(mpi->flags&MP_IMGFLAG_PLANAR){
 	rotate(dmpi->planes[0],mpi->planes[0],
@@ -108,7 +102,8 @@ static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
 	dmpi->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
     }
 
-    return vf_next_put_image(vf,dmpi, pts);
+    talloc_free(mpi);
+    return dmpi;
 }
 
 //===========================================================================//
@@ -132,7 +127,7 @@ static int query_format(struct vf_instance *vf, unsigned int fmt){
 
 static int vf_open(vf_instance_t *vf, char *args){
     vf->config=config;
-    vf->put_image=put_image;
+    vf->filter=filter;
     vf->query_format=query_format;
     vf->priv=malloc(sizeof(struct vf_priv_s));
     vf->priv->direction=args?atoi(args):0;