checkasm: add vf_nlmeans test for ssd_integral_image

tests/checkasm/Makefile

@@ -35,6 +35,7 @@ AVFILTEROBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o
 AVFILTEROBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o
 AVFILTEROBJS-$(CONFIG_HFLIP_FILTER)      += vf_hflip.o
 AVFILTEROBJS-$(CONFIG_THRESHOLD_FILTER)  += vf_threshold.o
+AVFILTEROBJS-$(CONFIG_NLMEANS_FILTER)    += vf_nlmeans.o
 
 CHECKASMOBJS-$(CONFIG_AVFILTER) += $(AVFILTEROBJS-yes)
 

tests/checkasm/checkasm.c

@@ -159,6 +159,9 @@ static const struct {
     #if CONFIG_HFLIP_FILTER
         { "vf_hflip", checkasm_check_vf_hflip },
     #endif
+    #if CONFIG_NLMEANS_FILTER
+        { "vf_nlmeans", checkasm_check_nlmeans },
+    #endif
     #if CONFIG_THRESHOLD_FILTER
         { "vf_threshold", checkasm_check_vf_threshold },
     #endif

tests/checkasm/checkasm.h

@@ -62,6 +62,7 @@ void checkasm_check_huffyuvdsp(void);
 void checkasm_check_jpeg2000dsp(void);
 void checkasm_check_llviddsp(void);
 void checkasm_check_llviddspenc(void);
+void checkasm_check_nlmeans(void);
 void checkasm_check_pixblockdsp(void);
 void checkasm_check_sbrdsp(void);
 void checkasm_check_synth_filter(void);

tests/checkasm/vf_nlmeans.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2018 Clément Bœsch <u pkh me>
+ *
+ * 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 "checkasm.h"
+#include "libavfilter/vf_nlmeans.h"
+#include "libavutil/avassert.h"
+
+#define randomize_buffer(buf, size) do {    \
+    int i;                                  \
+    for (i = 0; i < size / 4; i++)          \
+        ((uint32_t *)buf)[i] = rnd();       \
+} while (0)
+
+void checkasm_check_nlmeans(void)
+{
+    NLMeansDSPContext dsp = {0};
+
+    const int w = 123;  // source width
+    const int h = 45;   // source height
+    const int p = 3;    // patch half size
+    const int r = 2;    // research window half size
+
+    ff_nlmeans_init(&dsp);
+
+    /* See the filter's code for the explanations on the variables */
+    if (check_func(dsp.compute_safe_ssd_integral_image, "ssd_integral_image")) {
+        int offx, offy;
+        const int e = p + r;
+        const int ii_w = w + e*2;
+        const int ii_h = h + e*2;
+        const int ii_lz_32 = FFALIGN(ii_w + 1, 4);
+        uint32_t *ii_orig_ref = av_mallocz_array(ii_h + 1, ii_lz_32 * sizeof(*ii_orig_ref));
+        uint32_t *ii_ref = ii_orig_ref + ii_lz_32 + 1;
+        uint32_t *ii_orig_new = av_mallocz_array(ii_h + 1, ii_lz_32 * sizeof(*ii_orig_new));
+        uint32_t *ii_new = ii_orig_new + ii_lz_32 + 1;
+        const int src_lz = FFALIGN(w, 16);
+        uint8_t *src = av_mallocz_array(h, src_lz);
+
+        declare_func(void, uint32_t *dst, ptrdiff_t dst_linesize_32,
+                     const uint8_t *s1, ptrdiff_t linesize1,
+                     const uint8_t *s2, ptrdiff_t linesize2,
+                     int w, int h);
+
+        randomize_buffer(src, h * src_lz);
+
+        for (offy = -r; offy <= r; offy++) {
+            for (offx = -r; offx <= r; offx++) {
+                if (offx || offy) {
+                    const int s1x = e;
+                    const int s1y = e;
+                    const int s2x = e + offx;
+                    const int s2y = e + offy;
+                    const int startx_safe = FFMAX(s1x, s2x);
+                    const int starty_safe = FFMAX(s1y, s2y);
+                    const int u_endx_safe = FFMIN(s1x + w, s2x + w);
+                    const int endy_safe   = FFMIN(s1y + h, s2y + h);
+                    const int safe_pw = (u_endx_safe - startx_safe) & ~0xf;
+                    const int safe_ph = endy_safe - starty_safe;
+
+                    av_assert0(safe_pw && safe_ph);
+                    av_assert0(startx_safe - s1x >= 0); av_assert0(startx_safe - s1x < w);
+                    av_assert0(starty_safe - s1y >= 0); av_assert0(starty_safe - s1y < h);
+                    av_assert0(startx_safe - s2x >= 0); av_assert0(startx_safe - s2x < w);
+                    av_assert0(starty_safe - s2y >= 0); av_assert0(starty_safe - s2y < h);
+
+                    memset(ii_ref, 0, ii_lz_32 * ii_h * sizeof(*ii_ref));
+                    memset(ii_new, 0, ii_lz_32 * ii_h * sizeof(*ii_new));
+
+                    call_ref(ii_ref + starty_safe*ii_lz_32 + startx_safe, ii_lz_32,
+                             src + (starty_safe - s1y) * src_lz + (startx_safe - s1x), src_lz,
+                             src + (starty_safe - s2y) * src_lz + (startx_safe - s2x), src_lz,
+                             safe_pw, safe_ph);
+                    call_new(ii_new + starty_safe*ii_lz_32 + startx_safe, ii_lz_32,
+                             src + (starty_safe - s1y) * src_lz + (startx_safe - s1x), src_lz,
+                             src + (starty_safe - s2y) * src_lz + (startx_safe - s2x), src_lz,
+                             safe_pw, safe_ph);
+
+                    if (memcmp(ii_ref, ii_new, ii_h * ii_lz_32 * 4))
+                        fail();
+
+                    memset(ii_new, 0, ii_lz_32 * ii_h * sizeof(*ii_new));
+                    bench_new(ii_new + starty_safe*ii_lz_32 + startx_safe, ii_lz_32,
+                             src + (starty_safe - s1y) * src_lz + (startx_safe - s1x), src_lz,
+                             src + (starty_safe - s2y) * src_lz + (startx_safe - s2x), src_lz,
+                             safe_pw, safe_ph);
+                }
+            }
+        }
+
+        av_freep(&ii_orig_ref);
+        av_freep(&ii_orig_new);
+        av_freep(&src);
+    }
+
+    report("dsp");
+}