avfilter/vf_framerate: add SIMD functions for frame blending

Blend function speedups on x86_64 Core i5 4460:

ffmpeg -f lavfi -i allyuv -vf framerate=60:threads=1 -f null none

C:     447548411 decicycles in Blend,    2048 runs,      0 skips
SSSE3: 130020087 decicycles in Blend,    2048 runs,      0 skips
AVX2:  128508221 decicycles in Blend,    2048 runs,      0 skips

ffmpeg -f lavfi -i allyuv -vf format=yuv420p12,framerate=60:threads=1 -f null none

C:     228932745 decicycles in Blend,    2048 runs,      0 skips
SSE4:  123357781 decicycles in Blend,    2048 runs,      0 skips
AVX2:  121215353 decicycles in Blend,    2048 runs,      0 skips
Signed-off-by: Marton Balint <cus@passwd.hu>

libavfilter/framerate.h

+/*
+ * 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 AVFILTER_FRAMERATE_H
+#define AVFILTER_FRAMERATE_H
+
+#include "libavutil/pixelutils.h"
+#include "avfilter.h"
+
+#define BLEND_FUNC_PARAMS const uint8_t *src1, ptrdiff_t src1_linesize, \
+                          const uint8_t *src2, ptrdiff_t src2_linesize, \
+                          uint8_t *dst, ptrdiff_t dst_linesize, \
+                          ptrdiff_t width, ptrdiff_t height, \
+                          int factor1, int factor2, int half
+
+#define BLEND_FACTOR_DEPTH8   7
+#define BLEND_FACTOR_DEPTH16 15
+
+typedef void (*blend_func)(BLEND_FUNC_PARAMS);
+
+typedef struct FrameRateContext {
+    const AVClass *class;
+    // parameters
+    AVRational dest_frame_rate;         ///< output frames per second
+    int flags;                          ///< flags affecting frame rate conversion algorithm
+    double scene_score;                 ///< score that denotes a scene change has happened
+    int interp_start;                   ///< start of range to apply linear interpolation
+    int interp_end;                     ///< end of range to apply linear interpolation
+
+    int line_size[4];                   ///< bytes of pixel data per line for each plane
+    int vsub;
+
+    AVRational srce_time_base;          ///< timebase of source
+    AVRational dest_time_base;          ///< timebase of destination
+
+    av_pixelutils_sad_fn sad;           ///< Sum of the absolute difference function (scene detect only)
+    double prev_mafd;                   ///< previous MAFD                           (scene detect only)
+
+    int blend_factor_max;
+    int bitdepth;
+    AVFrame *work;
+
+    AVFrame *f0;                        ///< last frame
+    AVFrame *f1;                        ///< current frame
+    int64_t pts0;                       ///< last frame pts in dest_time_base
+    int64_t pts1;                       ///< current frame pts in dest_time_base
+    int64_t delta;                      ///< pts1 to pts0 delta
+    double score;                       ///< scene change score (f0 to f1)
+    int flush;                          ///< 1 if the filter is being flushed
+    int64_t start_pts;                  ///< pts of the first output frame
+    int64_t n;                          ///< output frame counter
+
+    blend_func blend;
+} FrameRateContext;
+
+void ff_framerate_init(FrameRateContext *s);
+void ff_framerate_init_x86(FrameRateContext *s);
+
+#endif /* AVFILTER_FRAMERATE_H */

libavfilter/vf_framerate.c

@@ -38,52 +38,7 @@
 #include "avfilter.h"
 #include "internal.h"
 #include "video.h"
-
-#define BLEND_FUNC_PARAMS const uint8_t *src1, ptrdiff_t src1_linesize, \
-                          const uint8_t *src2, ptrdiff_t src2_linesize, \
-                          uint8_t *dst, ptrdiff_t dst_linesize, \
-                          ptrdiff_t width, ptrdiff_t height, \
-                          int factor1, int factor2, int half
-
-#define BLEND_FACTOR_DEPTH8   7
-#define BLEND_FACTOR_DEPTH16 15
-
-typedef void (*blend_func)(BLEND_FUNC_PARAMS);
-
-typedef struct FrameRateContext {
-    const AVClass *class;
-    // parameters
-    AVRational dest_frame_rate;         ///< output frames per second
-    int flags;                          ///< flags affecting frame rate conversion algorithm
-    double scene_score;                 ///< score that denotes a scene change has happened
-    int interp_start;                   ///< start of range to apply linear interpolation
-    int interp_end;                     ///< end of range to apply linear interpolation
-
-    int line_size[4];                   ///< bytes of pixel data per line for each plane
-    int vsub;
-
-    AVRational srce_time_base;          ///< timebase of source
-    AVRational dest_time_base;          ///< timebase of destination
-
-    av_pixelutils_sad_fn sad;           ///< Sum of the absolute difference function (scene detect only)
-    double prev_mafd;                   ///< previous MAFD                           (scene detect only)
-
-    int blend_factor_max;
-    int bitdepth;
-    AVFrame *work;
-
-    AVFrame *f0;                        ///< last frame
-    AVFrame *f1;                        ///< current frame
-    int64_t pts0;                       ///< last frame pts in dest_time_base
-    int64_t pts1;                       ///< current frame pts in dest_time_base
-    int64_t delta;                      ///< pts1 to pts0 delta
-    double score;                       ///< scene change score (f0 to f1)
-    int flush;                          ///< 1 if the filter is being flushed
-    int64_t start_pts;                  ///< pts of the first output frame
-    int64_t n;                          ///< output frame counter
-
-    blend_func blend;
-} FrameRateContext;
+#include "framerate.h"
 
 #define OFFSET(x) offsetof(FrameRateContext, x)
 #define V AV_OPT_FLAG_VIDEO_PARAM
@@ -246,7 +201,7 @@ static int blend_frames(AVFilterContext *ctx, int interpolate)
         av_frame_copy_props(s->work, s->f0);
 
         ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
-        ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
+        ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx)));
         return 1;
     }
     return 0;
@@ -366,6 +321,19 @@ static void blend_frames16_c(BLEND_FUNC_PARAMS)
     }
 }
 
+void ff_framerate_init(FrameRateContext *s)
+{
+    if (s->bitdepth == 8) {
+        s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH8;
+        s->blend = blend_frames_c;
+    } else {
+        s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH16;
+        s->blend = blend_frames16_c;
+    }
+    if (ARCH_X86)
+        ff_framerate_init_x86(s);
+}
+
 static int config_input(AVFilterLink *inlink)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -387,13 +355,7 @@ static int config_input(AVFilterLink *inlink)
 
     s->srce_time_base = inlink->time_base;
 
-    if (s->bitdepth == 8) {
-        s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH8;
-        s->blend = blend_frames_c;
-    } else {
-        s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH16;
-        s->blend = blend_frames16_c;
-    }
+    ff_framerate_init(s);
 
     return 0;
 }

libavfilter/x86/Makefile

@@ -5,6 +5,7 @@ OBJS-$(CONFIG_COLORSPACE_FILTER)             += x86/colorspacedsp_init.o
 OBJS-$(CONFIG_EQ_FILTER)                     += x86/vf_eq.o
 OBJS-$(CONFIG_FSPP_FILTER)                   += x86/vf_fspp_init.o
 OBJS-$(CONFIG_GRADFUN_FILTER)                += x86/vf_gradfun_init.o
+OBJS-$(CONFIG_FRAMERATE_FILTER)              += x86/vf_framerate_init.o
 OBJS-$(CONFIG_HFLIP_FILTER)                  += x86/vf_hflip_init.o
 OBJS-$(CONFIG_HQDN3D_FILTER)                 += x86/vf_hqdn3d_init.o
 OBJS-$(CONFIG_IDET_FILTER)                   += x86/vf_idet_init.o
@@ -31,6 +32,7 @@ X86ASM-OBJS-$(CONFIG_AFIR_FILTER)            += x86/af_afir.o
 X86ASM-OBJS-$(CONFIG_BLEND_FILTER)           += x86/vf_blend.o
 X86ASM-OBJS-$(CONFIG_BWDIF_FILTER)           += x86/vf_bwdif.o
 X86ASM-OBJS-$(CONFIG_COLORSPACE_FILTER)      += x86/colorspacedsp.o
+X86ASM-OBJS-$(CONFIG_FRAMERATE_FILTER)       += x86/vf_framerate.o
 X86ASM-OBJS-$(CONFIG_FSPP_FILTER)            += x86/vf_fspp.o
 X86ASM-OBJS-$(CONFIG_GRADFUN_FILTER)         += x86/vf_gradfun.o
 X86ASM-OBJS-$(CONFIG_HFLIP_FILTER)           += x86/vf_hflip.o

libavfilter/x86/vf_framerate.asm

+;*****************************************************************************
+;* x86-optimized functions for framerate filter
+;*
+;* Copyright (C) 2018 Marton Balint
+;*
+;* Based on vf_blend.asm, Copyright (C) 2015 Paul B Mahol
+;*
+;* 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"
+
+SECTION .text
+
+
+%macro XSPLAT 3
+%if cpuflag(avx2)
+    vpbroadcast%3  %1, %2
+%else
+    movd           %1, %2
+%ifidn %3, d
+    SPLATD         %1
+%else
+    SPLATW         %1, %1
+%endif
+%endif
+%endmacro
+
+
+%macro BLEND_INIT 0-1
+%if ARCH_X86_64
+cglobal blend_frames%1, 6, 9, 5, src1, src1_linesize, src2, src2_linesize, dst, dst_linesize, width, end, x
+    mov    widthd, dword widthm
+%else
+cglobal blend_frames%1, 5, 7, 5, src1, src1_linesize, src2, src2_linesize, dst, end, x
+%define dst_linesizeq r5mp
+%define widthq r6mp
+%endif
+    mov      endd, dword r7m
+    add     src1q, widthq
+    add     src2q, widthq
+    add      dstq, widthq
+    neg    widthq
+%endmacro
+
+
+%macro BLEND_LOOP 4
+.nextrow:
+    mov        xq, widthq
+
+    .loop:
+        movu            m0, [src1q + xq]
+        movu            m1, [src2q + xq]
+        SBUTTERFLY    %1%2, 0, 1, 4         ; aAbBcCdD
+                                            ; eEfFgGhH
+        pmadd%3         m0, m2
+        pmadd%3         m1, m2
+
+        padd%2          m0, m3
+        padd%2          m1, m3
+        psrl%2          m0, %4              ; 0A0B0C0D
+        psrl%2          m1, %4              ; 0E0F0G0H
+
+        packus%2%1      m0, m1              ; ABCDEFGH
+        movu   [dstq + xq], m0
+        add             xq, mmsize
+    jl .loop
+    add     src1q, src1_linesizeq
+    add     src2q, src2_linesizeq
+    add      dstq, dst_linesizeq
+    sub      endd, 1
+    jg .nextrow
+REP_RET
+%endmacro
+
+
+%macro BLEND_FRAMES 0
+    BLEND_INIT
+
+    XSPLAT     m2, r8m, w                   ; factor1
+    XSPLAT     m3, r9m, w                   ; factor2
+
+    psllw      m3, 8
+    por        m2, m3                       ; interleaved factors
+
+    XSPLAT     m3, r10m, w                  ; half
+
+    BLEND_LOOP  b, w, ubsw, 7
+%endmacro
+
+
+%macro BLEND_FRAMES16 0
+    BLEND_INIT 16
+
+    XSPLAT     m2, r8m, d                   ; factor1
+    XSPLAT     m3, r9m, d                   ; factor2
+
+    pslld      m3, 16
+    por        m2, m3                       ; interleaved factors
+
+    XSPLAT     m3, r10m, d                  ; half
+
+    BLEND_LOOP  w, d, wd, 15
+%endmacro
+
+
+INIT_XMM ssse3
+BLEND_FRAMES
+
+INIT_XMM sse4
+BLEND_FRAMES16
+
+
+%if HAVE_AVX2_EXTERNAL
+
+INIT_YMM avx2
+BLEND_FRAMES
+BLEND_FRAMES16
+
+%endif

libavfilter/x86/vf_framerate_init.c

+/*
+ * 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/cpu.h"
+#include "libavutil/x86/cpu.h"
+#include "libavfilter/framerate.h"
+
+void ff_blend_frames_ssse3(BLEND_FUNC_PARAMS);
+void ff_blend_frames_avx2(BLEND_FUNC_PARAMS);
+void ff_blend_frames16_sse4(BLEND_FUNC_PARAMS);
+void ff_blend_frames16_avx2(BLEND_FUNC_PARAMS);
+
+void ff_framerate_init_x86(FrameRateContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+    if (s->bitdepth == 8) {
+        if (EXTERNAL_AVX2_FAST(cpu_flags))
+            s->blend = ff_blend_frames_avx2;
+        else if (EXTERNAL_SSSE3(cpu_flags))
+            s->blend = ff_blend_frames_ssse3;
+    } else {
+        if (EXTERNAL_AVX2_FAST(cpu_flags))
+            s->blend = ff_blend_frames16_avx2;
+        else if (EXTERNAL_SSE4(cpu_flags))
+            s->blend = ff_blend_frames16_sse4;
+    }
+}