avfilter/vf_framerate: factorize SAD functions which compute SAD for a whole frame

Also add SIMD which works on lines because it is faster then calculating it on
8x8 blocks using pixelutils.

Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 72 insertions, 0 deletions

diff --git a/libavfilter/scene_sad.c b/libavfilter/scene_sad.c
new file mode 100644
index 0000000000..fa57a25961
--- /dev/null
+++ b/libavfilter/scene_sad.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Scene SAD funtions
+ */
+
+#include "scene_sad.h"
+
+void ff_scene_sad16_c(SCENE_SAD_PARAMS)
+{
+    uint64_t sad = 0;
+    const uint16_t *src1w = (const uint16_t *)src1;
+    const uint16_t *src2w = (const uint16_t *)src2;
+    int x, y;
+
+    stride1 /= 2;
+    stride2 /= 2;
+
+    for (y = 0; y < height; y++) {
+        for (x = 0; x < width; x++)
+            sad += FFABS(src1w[x] - src2w[x]);
+        src1w += stride1;
+        src2w += stride2;
+    }
+    *sum = sad;
+}
+
+void ff_scene_sad_c(SCENE_SAD_PARAMS)
+{
+    uint64_t sad = 0;
+    int x, y;
+
+    for (y = 0; y < height; y++) {
+        for (x = 0; x < width; x++)
+            sad += FFABS(src1[x] - src2[x]);
+        src1 += stride1;
+        src2 += stride2;
+    }
+    *sum = sad;
+}
+
+ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
+{
+    ff_scene_sad_fn sad = NULL;
+    if (ARCH_X86)
+        sad = ff_scene_sad_get_fn_x86(depth);
+    if (!sad) {
+        if (depth == 8)
+            sad = ff_scene_sad_c;
+        if (depth == 16)
+            sad = ff_scene_sad16_c;
+    }
+    return sad;
+}
+