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, 38 insertions, 0 deletions

diff --git a/libavfilter/x86/vf_ssim_init.c b/libavfilter/x86/vf_ssim_init.c
new file mode 100644
index 0000000000..9514b25ee3
--- /dev/null
+++ b/libavfilter/x86/vf_ssim_init.c
@@ -0,0 +1,38 @@
+/*
+ * 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
+ */
+
+#include "libavutil/x86/cpu.h"
+
+#include "libavfilter/ssim.h"
+
+void ff_ssim_4x4_line_ssse3(const uint8_t *buf, ptrdiff_t buf_stride,
+                            const uint8_t *ref, ptrdiff_t ref_stride,
+                            int (*sums)[4], int w);
+float ff_ssim_end_line_sse4(const int (*sum0)[4], const int (*sum1)[4], int w);
+
+void ff_ssim_init_x86(SSIMDSPContext *dsp)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (ARCH_X86_64 && EXTERNAL_SSSE3(cpu_flags))
+        dsp->ssim_4x4_line = ff_ssim_4x4_line_ssse3;
+    if (EXTERNAL_SSE4(cpu_flags))
+        dsp->ssim_end_line = ff_ssim_end_line_sse4;
+}