vf_interlace: Add SIMD for lowpass filter

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/libavfilter/x86/vf_interlace.asm b/libavfilter/x86/vf_interlace.asm
new file mode 100644
index 0000000000..8c2e9b099c
--- /dev/null
+++ b/libavfilter/x86/vf_interlace.asm
@@ -0,0 +1,75 @@
+;*****************************************************************************
+;* x86-optimized functions for interlace filter
+;*
+;* Copyright (C) 2014 Kieran Kunhya <kierank@obe.tv>
+;*
+;* This file is part of Libav.
+;*
+;* Libav is free software; you can redistribute it and/or modify
+;* it under the terms of the GNU General Public License as published by
+;* the Free Software Foundation; either version 2 of the License, or
+;* (at your option) any later version.
+;*
+;* Libav 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 General Public License for more details.
+;*
+;* You should have received a copy of the GNU General Public License along
+;* with Libav; if not, write to the Free Software Foundation, Inc.,
+;* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+;******************************************************************************
+
+%include "libavutil/x86/x86util.asm"
+
+SECTION_RODATA
+
+SECTION .text
+
+%macro LOWPASS_LINE 0
+cglobal lowpass_line, 5, 5, 7
+    add r0, r1
+    add r2, r1
+    add r3, r1
+    add r4, r1
+    neg r1
+
+    pxor m6, m6
+
+.loop
+    mova m0, [r2+r1]
+    punpcklbw m1, m0, m6
+    punpckhbw m0, m6
+    paddw m0, m0
+    paddw m1, m1
+
+    mova m2, [r3+r1]
+    punpcklbw m3, m2, m6
+    punpckhbw m2, m6
+
+    mova m4, [r4+r1]
+    punpcklbw m5, m4, m6
+    punpckhbw m4, m6
+
+    paddw m1, m3
+    pavgw m1, m5
+
+    paddw m0, m2
+    pavgw m0, m4
+
+    psrlw m0, 1
+    psrlw m1, 1
+
+    packuswb m1, m0
+    mova [r0+r1], m1
+
+    add r1, mmsize
+    jl .loop
+REP_RET
+%endmacro
+
+INIT_XMM sse2
+LOWPASS_LINE
+
+INIT_XMM avx
+LOWPASS_LINE