From e207c24b32a457859ab6e3a5b1f5f9eaeea36ed1 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 16 Apr 2015 22:42:31 +0200
Subject: vf_mirror: replace internal implementation with libavfilter

Currently, libavfilter's equivalent vf_hflip is probably not faster or
anything, but there's still no reason to keep the internal code.
---
 video/filter/vf_mirror.c | 89 +++---------------------------------------------
 1 file changed, 4 insertions(+), 85 deletions(-)

diff --git a/video/filter/vf_mirror.c b/video/filter/vf_mirror.c
index d92f320235..342c6abd2a 100644
--- a/video/filter/vf_mirror.c
+++ b/video/filter/vf_mirror.c
@@ -15,93 +15,14 @@
  * with mpv.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <inttypes.h>
+#include <stddef.h>
 
-#include "config.h"
-#include "common/msg.h"
-
-#include "video/img_format.h"
-#include "video/mp_image.h"
 #include "vf.h"
+#include "vf_lavfi.h"
 
-static int config(struct vf_instance *vf, int width, int height,
-                  int d_width, int d_height,
-                  unsigned int flags, unsigned int fmt)
-{
-    struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
-    int a_w = MP_ALIGN_DOWN(width, desc.align_x);
-    vf_rescale_dsize(&d_width, &d_height, width, height, a_w, height);
-    return vf_next_config(vf, a_w, height, d_width, d_height, flags, fmt);
-}
-
-static inline void mirror_4_m(uint8_t *dst, uint8_t *src, int p,
-                              int c0, int c1, int c2, int c3)
-{
-    for (int x = 0; x < p; x++) {
-        dst[x * 4 + 0] = src[(p - x - 1) * 4 + c0];
-        dst[x * 4 + 1] = src[(p - x - 1) * 4 + c1];
-        dst[x * 4 + 2] = src[(p - x - 1) * 4 + c2];
-        dst[x * 4 + 3] = src[(p - x - 1) * 4 + c3];
-    }
-}
-
-static inline void mirror(uint8_t *dst, uint8_t *src, int bp, int w)
-{
-    for (int x = 0; x < w; x++)
-        memcpy(dst + x * bp, src + (w - x - 1) * bp, bp);
-}
-
-static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
+static int vf_open(vf_instance_t *vf)
 {
-    mp_image_t *dmpi = vf_alloc_out_image(vf);
-    if (!dmpi)
-        return NULL;
-    mp_image_copy_attributes(dmpi, mpi);
-
-    for (int p = 0; p < mpi->num_planes; p++) {
-        int plane_h = mp_image_plane_h(mpi, p);
-        for (int y = 0; y < plane_h; y++) {
-            void *p_src = mpi->planes[p] + mpi->stride[p] * y;
-            void *p_dst = dmpi->planes[p] + dmpi->stride[p] * y;
-            int w = mp_image_plane_w(dmpi, p);
-            if (mpi->imgfmt == IMGFMT_YUYV) {
-                mirror_4_m(p_dst, p_src, w / 2, 2, 1, 0, 3);
-            } else if (mpi->imgfmt == IMGFMT_UYVY) {
-                mirror_4_m(p_dst, p_src, w / 2, 0, 3, 2, 1);
-            } else {
-                // make the compiler unroll the memcpy in mirror()
-                switch (mpi->fmt.bytes[p]) {
-                case 1: mirror(p_dst, p_src, 1, w); break;
-                case 2: mirror(p_dst, p_src, 2, w); break;
-                case 3: mirror(p_dst, p_src, 3, w); break;
-                case 4: mirror(p_dst, p_src, 4, w); break;
-                default:
-                    mirror(p_dst, p_src, mpi->fmt.bytes[p], w);
-                }
-            }
-        }
-    }
-
-    talloc_free(mpi);
-    return dmpi;
-}
-
-static int query_format(struct vf_instance *vf, unsigned int fmt)
-{
-    struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
-    if (!(desc.flags & MP_IMGFLAG_BYTE_ALIGNED))
-        return 0;
-    return vf_next_query_format(vf, fmt);
-}
-
-static int vf_open(vf_instance_t *vf){
-    vf->config=config;
-    vf->filter=filter;
-    vf->query_format=query_format;
-    return 1;
+    return vf_lw_set_graph(vf, NULL, NULL, "hflip") >= 0;
 }
 
 const vf_info_t vf_info_mirror = {
@@ -109,5 +30,3 @@ const vf_info_t vf_info_mirror = {
     .name = "mirror",
     .open = vf_open,
 };
-
-//===========================================================================//
-- 
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