VP56: move vp56_edge_filter to new VP56DSPContext

Using macro templates allows the vp[56]_adjust functions to be
inlined instead of called through function pointers.  The new
function pointers enable optimised implementations of the filters.

4% faster VP6 decoding on Cortex-A8.

Originally committed as revision 22992 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -358,9 +358,9 @@ OBJS-$(CONFIG_VORBIS_DECODER)          += vorbis_dec.o vorbis.o \
 OBJS-$(CONFIG_VORBIS_ENCODER)          += vorbis_enc.o vorbis.o \
                                           vorbis_data.o
 OBJS-$(CONFIG_VP3_DECODER)             += vp3.o vp3dsp.o
-OBJS-$(CONFIG_VP5_DECODER)             += vp5.o vp56.o vp56data.o \
+OBJS-$(CONFIG_VP5_DECODER)             += vp5.o vp56.o vp56data.o vp56dsp.o \
                                           vp3dsp.o
-OBJS-$(CONFIG_VP6_DECODER)             += vp6.o vp56.o vp56data.o \
+OBJS-$(CONFIG_VP6_DECODER)             += vp6.o vp56.o vp56data.o vp56dsp.o \
                                           vp3dsp.o vp6dsp.o huffman.o
 OBJS-$(CONFIG_VQA_DECODER)             += vqavideo.o
 OBJS-$(CONFIG_WAVPACK_DECODER)         += wavpack.o

libavcodec/vp5.c

@@ -69,23 +69,6 @@ static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
     return 1;
 }
 
-/* Gives very similar result than the vp6 version except in a few cases */
-static int vp5_adjust(int v, int t)
-{
-    int s2, s1 = v >> 31;
-    v ^= s1;
-    v -= s1;
-    v *= v < 2*t;
-    v -= t;
-    s2 = v >> 31;
-    v ^= s2;
-    v -= s2;
-    v = t - v;
-    v += s1;
-    v ^= s1;
-    return v;
-}
-
 static void vp5_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
 {
     VP56RangeCoder *c = &s->c;
@@ -274,7 +257,6 @@ static av_cold int vp5_decode_init(AVCodecContext *avctx)
     vp56_init(avctx, 1, 0);
     s->vp56_coord_div = vp5_coord_div;
     s->parse_vector_adjustment = vp5_parse_vector_adjustment;
-    s->adjust = vp5_adjust;
     s->parse_coeff = vp5_parse_coeff;
     s->default_models_init = vp5_default_models_init;
     s->parse_vector_models = vp5_parse_vector_models;

libavcodec/vp56.c

@@ -300,27 +300,12 @@ static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
     }
 }
 
-static void vp56_edge_filter(VP56Context *s, uint8_t *yuv,
-                             int pix_inc, int line_inc, int t)
-{
-    int pix2_inc = 2 * pix_inc;
-    int i, v;
-
-    for (i=0; i<12; i++) {
-        v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4) >>3;
-        v = s->adjust(v, t);
-        yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);
-        yuv[0] = av_clip_uint8(yuv[0] - v);
-        yuv += line_inc;
-    }
-}
-
 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
                                 int stride, int dx, int dy)
 {
     int t = vp56_filter_threshold[s->quantizer];
-    if (dx)  vp56_edge_filter(s, yuv +         10-dx ,      1, stride, t);
-    if (dy)  vp56_edge_filter(s, yuv + stride*(10-dy), stride,      1, t);
+    if (dx)  s->vp56dsp.edge_filter_hor(yuv +         10-dx , stride, t);
+    if (dy)  s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t);
 }
 
 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
@@ -665,6 +650,7 @@ av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
     if (avctx->idct_algo == FF_IDCT_AUTO)
         avctx->idct_algo = FF_IDCT_VP3;
     dsputil_init(&s->dsp, avctx);
+    ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id);
     ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
 
     for (i=0; i<4; i++)

libavcodec/vp56.h

@@ -28,14 +28,13 @@
 #include "dsputil.h"
 #include "get_bits.h"
 #include "bytestream.h"
-
+#include "vp56dsp.h"
 
 typedef struct vp56_context VP56Context;
 typedef struct vp56_mv VP56mv;
 
 typedef void (*VP56ParseVectorAdjustment)(VP56Context *s,
                                           VP56mv *vect);
-typedef int  (*VP56Adjust)(int v, int t);
 typedef void (*VP56Filter)(VP56Context *s, uint8_t *dst, uint8_t *src,
                            int offset1, int offset2, int stride,
                            VP56mv mv, int mask, int select, int luma);
@@ -90,6 +89,7 @@ typedef struct {
 struct vp56_context {
     AVCodecContext *avctx;
     DSPContext dsp;
+    VP56DSPContext vp56dsp;
     ScanTable scantable;
     AVFrame frames[4];
     AVFrame *framep[6];
@@ -149,7 +149,6 @@ struct vp56_context {
 
     const uint8_t *vp56_coord_div;
     VP56ParseVectorAdjustment parse_vector_adjustment;
-    VP56Adjust adjust;
     VP56Filter filter;
     VP56ParseCoeff parse_coeff;
     VP56DefaultModelsInit default_models_init;

libavcodec/vp56dsp.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.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 <stdint.h>
+#include "avcodec.h"
+#include "vp56dsp.h"
+
+/* Gives very similar result than the vp6 version except in a few cases */
+static int vp5_adjust(int v, int t)
+{
+    int s2, s1 = v >> 31;
+    v ^= s1;
+    v -= s1;
+    v *= v < 2*t;
+    v -= t;
+    s2 = v >> 31;
+    v ^= s2;
+    v -= s2;
+    v = t - v;
+    v += s1;
+    v ^= s1;
+    return v;
+}
+
+static int vp6_adjust(int v, int t)
+{
+    int V = v, s = v >> 31;
+    V ^= s;
+    V -= s;
+    if (V-t-1 >= (unsigned)(t-1))
+        return v;
+    V = 2*t - V;
+    V += s;
+    V ^= s;
+    return V;
+}
+
+
+#define VP56_EDGE_FILTER(pfx, suf, pix_inc, line_inc)                   \
+static void pfx##_edge_filter_##suf(uint8_t *yuv, int stride, int t)    \
+{                                                                       \
+    int pix2_inc = 2 * pix_inc;                                         \
+    int i, v;                                                           \
+                                                                        \
+    for (i=0; i<12; i++) {                                              \
+        v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4)>>3;\
+        v = pfx##_adjust(v, t);                                         \
+        yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);               \
+        yuv[0] = av_clip_uint8(yuv[0] - v);                             \
+        yuv += line_inc;                                                \
+    }                                                                   \
+}
+
+VP56_EDGE_FILTER(vp5, hor, 1, stride)
+VP56_EDGE_FILTER(vp5, ver, stride, 1)
+VP56_EDGE_FILTER(vp6, hor, 1, stride)
+VP56_EDGE_FILTER(vp6, ver, stride, 1)
+
+void ff_vp56dsp_init(VP56DSPContext *s, enum CodecID codec)
+{
+    if (codec == CODEC_ID_VP5) {
+        s->edge_filter_hor = vp5_edge_filter_hor;
+        s->edge_filter_ver = vp5_edge_filter_ver;
+    } else {
+        s->edge_filter_hor = vp6_edge_filter_hor;
+        s->edge_filter_ver = vp6_edge_filter_ver;
+    }
+}

libavcodec/vp56dsp.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.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
+ */
+
+#ifndef AVCODEC_VP56DSP_H
+#define AVCODEC_VP56DSP_H
+
+#include <stdint.h>
+
+typedef struct VP56DSPContext {
+    void (*edge_filter_hor)(uint8_t *yuv, int stride, int t);
+    void (*edge_filter_ver)(uint8_t *yuv, int stride, int t);
+} VP56DSPContext;
+
+void ff_vp56dsp_init(VP56DSPContext *s, enum CodecID codec);
+
+#endif /* AVCODEC_VP56DSP_H */

libavcodec/vp6.c

@@ -481,19 +481,6 @@ static void vp6_parse_coeff(VP56Context *s)
     }
 }
 
-static int vp6_adjust(int v, int t)
-{
-    int V = v, s = v >> 31;
-    V ^= s;
-    V -= s;
-    if (V-t-1 >= (unsigned)(t-1))
-        return v;
-    V = 2*t - V;
-    V += s;
-    V ^= s;
-    return V;
-}
-
 static int vp6_block_variance(uint8_t *src, int stride)
 {
     int sum = 0, square_sum = 0;
@@ -592,7 +579,6 @@ static av_cold int vp6_decode_init(AVCodecContext *avctx)
                      avctx->codec->id == CODEC_ID_VP6A);
     s->vp56_coord_div = vp6_coord_div;
     s->parse_vector_adjustment = vp6_parse_vector_adjustment;
-    s->adjust = vp6_adjust;
     s->filter = vp6_filter;
     s->default_models_init = vp6_default_models_init;
     s->parse_vector_models = vp6_parse_vector_models;