avfilter: add limiter filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>

3 files changed, 130 insertions, 0 deletions

diff --git a/libavfilter/x86/Makefile b/libavfilter/x86/Makefile
index f598ceb3c8..3431625883 100644
--- a/libavfilter/x86/Makefile
+++ b/libavfilter/x86/Makefile
@@ -8,6 +8,7 @@ OBJS-$(CONFIG_GRADFUN_FILTER)                += x86/vf_gradfun_init.o
 OBJS-$(CONFIG_HQDN3D_FILTER)                 += x86/vf_hqdn3d_init.o
 OBJS-$(CONFIG_IDET_FILTER)                   += x86/vf_idet_init.o
 OBJS-$(CONFIG_INTERLACE_FILTER)              += x86/vf_interlace_init.o
+OBJS-$(CONFIG_LIMITER_FILTER)                += x86/vf_limiter_init.o
 OBJS-$(CONFIG_MASKEDMERGE_FILTER)            += x86/vf_maskedmerge_init.o
 OBJS-$(CONFIG_NOISE_FILTER)                  += x86/vf_noise.o
 OBJS-$(CONFIG_PP7_FILTER)                    += x86/vf_pp7_init.o
@@ -33,6 +34,7 @@ X86ASM-OBJS-$(CONFIG_GRADFUN_FILTER)         += x86/vf_gradfun.o
 X86ASM-OBJS-$(CONFIG_HQDN3D_FILTER)          += x86/vf_hqdn3d.o
 X86ASM-OBJS-$(CONFIG_IDET_FILTER)            += x86/vf_idet.o
 X86ASM-OBJS-$(CONFIG_INTERLACE_FILTER)       += x86/vf_interlace.o
+X86ASM-OBJS-$(CONFIG_LIMITER_FILTER)         += x86/vf_limiter.o
 X86ASM-OBJS-$(CONFIG_MASKEDMERGE_FILTER)     += x86/vf_maskedmerge.o
 X86ASM-OBJS-$(CONFIG_PP7_FILTER)             += x86/vf_pp7.o
 X86ASM-OBJS-$(CONFIG_PSNR_FILTER)            += x86/vf_psnr.o
diff --git a/libavfilter/x86/vf_limiter.asm b/libavfilter/x86/vf_limiter.asm
new file mode 100644
index 0000000000..9e7271be76
--- /dev/null
+++ b/libavfilter/x86/vf_limiter.asm
@@ -0,0 +1,84 @@
+;*****************************************************************************
+;* x86-optimized functions for limiter filter
+;*
+;* 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/x86util.asm"
+
+%if ARCH_X86_64
+
+SECTION_RODATA
+
+pb_0: times 16 db 0
+
+SECTION .text
+
+INIT_XMM sse2
+
+cglobal limiter_8bit, 8, 9, 3, src, dst, slinesize, dlinesize, w, h, min, max, x
+    movsxdifnidn wq, wd
+    add        srcq, wq
+    add        dstq, wq
+    neg          wq
+    SPLATB_REG   m1, min, [pb_0]
+    SPLATB_REG   m2, max, [pb_0]
+.nextrow:
+    mov          xq, wq
+
+    .loop:
+        movu           m0, [srcq + xq]
+        CLIPUB         m0, m1, m2
+        mova    [dstq+xq], m0
+        add            xq, mmsize
+    jl .loop
+
+    add        srcq, slinesizeq
+    add        dstq, dlinesizeq
+    sub        hd, 1
+    jg .nextrow
+    ret
+
+INIT_XMM sse4
+
+cglobal limiter_16bit, 8, 9, 3, src, dst, slinesize, dlinesize, w, h, min, max, x
+    shl          wd, 1
+    add        srcq, wq
+    add        dstq, wq
+    neg          wq
+    movd         m1, mind
+    SPLATW       m1, m1
+    movd         m2, maxd
+    SPLATW       m2, m2
+.nextrow:
+    mov          xq, wq
+
+    .loop:
+        movu           m0, [srcq + xq]
+        pmaxuw         m0, m1
+        pminuw         m0, m2
+        mova    [dstq+xq], m0
+        add            xq, mmsize
+    jl .loop
+
+    add        srcq, slinesizeq
+    add        dstq, dlinesizeq
+    sub        hd, 1
+    jg .nextrow
+    ret
+
+%endif
diff --git a/libavfilter/x86/vf_limiter_init.c b/libavfilter/x86/vf_limiter_init.c
new file mode 100644
index 0000000000..ef7d20a1a0
--- /dev/null
+++ b/libavfilter/x86/vf_limiter_init.c
@@ -0,0 +1,44 @@
+/*
+ * 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/limiter.h"
+
+void ff_limiter_8bit_sse2(const uint8_t *src, uint8_t *dst,
+                          ptrdiff_t slinesize, ptrdiff_t dlinesize,
+                          int w, int h, int min, int max);
+void ff_limiter_16bit_sse4(const uint8_t *src, uint8_t *dst,
+                           ptrdiff_t slinesize, ptrdiff_t dlinesize,
+                           int w, int h, int min, int max);
+
+void ff_limiter_init_x86(LimiterDSPContext *dsp, int bpp)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (ARCH_X86_64 && EXTERNAL_SSE2(cpu_flags)) {
+        if (bpp <= 8) {
+            dsp->limiter = ff_limiter_8bit_sse2;
+        }
+    }
+    if (ARCH_X86_64 && EXTERNAL_SSE4(cpu_flags)) {
+        if (bpp > 8) {
+            dsp->limiter = ff_limiter_16bit_sse4;
+        }
+    }
+}