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>

1 files changed, 74 insertions, 0 deletions

diff --git a/libavfilter/framerate.h b/libavfilter/framerate.h
new file mode 100644
index 0000000000..a42d5af68a
--- /dev/null
+++ b/libavfilter/framerate.h
@@ -0,0 +1,74 @@
+/*
+ * 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 */