checkasm: add vp9 MC tests.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

tests/checkasm/Makefile

@@ -11,6 +11,7 @@ AVCODECOBJS-$(CONFIG_VP8DSP)            += vp8dsp.o
 AVCODECOBJS-$(CONFIG_DCA_DECODER)       += dcadsp.o synth_filter.o
 AVCODECOBJS-$(CONFIG_HEVC_DECODER)      += hevc_mc.o hevc_idct.o
 AVCODECOBJS-$(CONFIG_V210_ENCODER)      += v210enc.o
+AVCODECOBJS-$(CONFIG_VP9_DECODER)       += vp9dsp.o
 
 CHECKASMOBJS-$(CONFIG_AVCODEC)          += $(AVCODECOBJS-yes)
 

tests/checkasm/checkasm.c

@@ -92,6 +92,9 @@ static const struct {
 #endif
 #if CONFIG_VP8DSP
     { "vp8dsp", checkasm_check_vp8dsp },
+#endif
+#if CONFIG_VP9_DECODER
+    { "vp9dsp", checkasm_check_vp9dsp },
 #endif
     { NULL }
 };

tests/checkasm/checkasm.h

@@ -42,6 +42,7 @@ void checkasm_check_hevc_mc(void);
 void checkasm_check_synth_filter(void);
 void checkasm_check_v210enc(void);
 void checkasm_check_vp8dsp(void);
+void checkasm_check_vp9dsp(void);
 
 void *checkasm_check_func(void *func, const char *name, ...) av_printf_format(2, 3);
 int checkasm_bench_func(void);

tests/checkasm/vp9dsp.c

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2015 Ronald S. Bultje <rsbultje@gmail.com>
+ *
+ * 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 <string.h>
+
+#include "libavutil/common.h"
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
+
+#include "libavcodec/vp9.h"
+
+#include "checkasm.h"
+
+static const uint32_t pixel_mask[3] = { 0xffffffff, 0x03ff03ff, 0x0fff0fff };
+
+#define BIT_DEPTH 8
+#define SIZEOF_PIXEL ((BIT_DEPTH + 7) / 8)
+#define DST_BUF_SIZE (size * size * SIZEOF_PIXEL)
+#define SRC_BUF_STRIDE 72
+#define SRC_BUF_SIZE ((size + 7) * SRC_BUF_STRIDE * SIZEOF_PIXEL)
+#define src (buf + 3 * SIZEOF_PIXEL * (SRC_BUF_STRIDE + 1))
+
+#define randomize_buffers()                               \
+    do {                                                  \
+        uint32_t mask = pixel_mask[(BIT_DEPTH - 8) >> 1]; \
+        int k;                                            \
+        for (k = 0; k < SRC_BUF_SIZE; k += 4) {           \
+            uint32_t r = rnd() & mask;                    \
+            AV_WN32A(buf + k, r);                         \
+        }                                                 \
+        if (op == 1) {                                    \
+            for (k = 0; k < DST_BUF_SIZE; k += 4) {       \
+                uint32_t r = rnd() & mask;                \
+                AV_WN32A(dst0 + k, r);                    \
+                AV_WN32A(dst1 + k, r);                    \
+            }                                             \
+        }                                                 \
+    } while (0)
+
+static void check_mc(void)
+{
+    static const char *const filter_names[4] = {
+        "8tap_smooth", "8tap_regular", "8tap_sharp", "bilin"
+    };
+    static const char *const subpel_names[2][2] = { { "", "h" }, { "v", "hv" } };
+    static const char *const op_names[2] = { "put", "avg" };
+
+    LOCAL_ALIGNED_32(uint8_t, buf,  [72 * 72 * 2]);
+    LOCAL_ALIGNED_32(uint8_t, dst0, [64 * 64 * 2]);
+    LOCAL_ALIGNED_32(uint8_t, dst1, [64 * 64 * 2]);
+    char str[256];
+    VP9DSPContext dsp;
+    int op, hsize, filter, dx, dy;
+
+    declare_func_emms(AV_CPU_FLAG_MMX | AV_CPU_FLAG_MMXEXT,
+                      void, uint8_t *dst, const uint8_t *ref,
+                      ptrdiff_t dst_stride, ptrdiff_t ref_stride,
+                      int h, int mx, int my);
+
+    for (op = 0; op < 2; op++) {
+        ff_vp9dsp_init(&dsp);
+        for (hsize = 0; hsize < 5; hsize++) {
+            int size = 64 >> hsize;
+
+            for (filter = 0; filter < 4; filter++) {
+                for (dx = 0; dx < 2; dx++) {
+                    for (dy = 0; dy < 2; dy++) {
+                        if (dx || dy) {
+                            snprintf(str, sizeof(str), "%s_%s_%d%s", op_names[op],
+                                     filter_names[filter], size,
+                                     subpel_names[dy][dx]);
+                        } else {
+                            snprintf(str, sizeof(str), "%s%d", op_names[op], size);
+                        }
+                        if (check_func(dsp.mc[hsize][filter][op][dx][dy],
+                                       "vp9_%s", str)) {
+                            int mx = dx ? 1 + (rnd() % 14) : 0;
+                            int my = dy ? 1 + (rnd() % 14) : 0;
+                            randomize_buffers();
+                            call_ref(dst0, src,
+                                     size * SIZEOF_PIXEL,
+                                     SRC_BUF_STRIDE * SIZEOF_PIXEL,
+                                     size, mx, my);
+                            call_new(dst1, src,
+                                     size * SIZEOF_PIXEL,
+                                     SRC_BUF_STRIDE * SIZEOF_PIXEL,
+                                     size, mx, my);
+                            if (memcmp(dst0, dst1, DST_BUF_SIZE))
+                                fail();
+
+                            // SIMD implementations for each filter of subpel
+                            // functions are identical
+                            if (filter >= 1 && filter <= 2) continue;
+
+                            bench_new(dst1, src, size * SIZEOF_PIXEL,
+                                      SRC_BUF_STRIDE * SIZEOF_PIXEL,
+                                      size, mx, my);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    report("mc");
+}
+
+void checkasm_check_vp9dsp(void)
+{
+    check_mc();
+}