vf_ssim: x86 simd for ssim_4x4xN and ssim_endN.

Both are 2-2.5x faster than their C counterpart.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 36 insertions, 0 deletions

diff --git a/libavfilter/ssim.h b/libavfilter/ssim.h
new file mode 100644
index 0000000000..cd3a6eef4b
--- /dev/null
+++ b/libavfilter/ssim.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2015 Ronald S. Bultje <rsbultje@gmail.com>
+ *
+ * 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
+ */
+
+#ifndef LIBAVFILTER_SSIM_H
+#define LIBAVFILTER_SSIM_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct SSIMDSPContext {
+    void (*ssim_4x4_line)(const uint8_t *buf, ptrdiff_t buf_stride,
+                          const uint8_t *ref, ptrdiff_t ref_stride,
+                          int (*sums)[4], int w);
+    float (*ssim_end_line)(const int (*sum0)[4], const int (*sum1)[4], int w);
+} SSIMDSPContext;
+
+void ff_ssim_init_x86(SSIMDSPContext *dsp);
+
+#endif /* LIBAVFILTER_SSIM_H */