checkasm/vf_interlace : add test for lowpass_line 8 and 16

tests/checkasm/Makefile

@@ -33,6 +33,7 @@ CHECKASMOBJS-$(CONFIG_AVCODEC)          += $(AVCODECOBJS-yes)
 AVFILTEROBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o
 AVFILTEROBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o
 AVFILTEROBJS-$(CONFIG_HFLIP_FILTER)      += vf_hflip.o
+AVFILTEROBJS-$(CONFIG_INTERLACE_FILTER)  += vf_interlace.o
 AVFILTEROBJS-$(CONFIG_THRESHOLD_FILTER)  += vf_threshold.o
 
 CHECKASMOBJS-$(CONFIG_AVFILTER) += $(AVFILTEROBJS-yes)

tests/checkasm/checkasm.c

@@ -155,6 +155,9 @@ static const struct {
     #if CONFIG_HFLIP_FILTER
         { "vf_hflip", checkasm_check_vf_hflip },
     #endif
+    #if CONFIG_INTERLACE_FILTER
+        { "vf_interlace", checkasm_check_vf_interlace },
+    #endif
     #if CONFIG_THRESHOLD_FILTER
         { "vf_threshold", checkasm_check_vf_threshold },
     #endif

tests/checkasm/checkasm.h

@@ -66,6 +66,7 @@ void checkasm_check_synth_filter(void);
 void checkasm_check_utvideodsp(void);
 void checkasm_check_v210enc(void);
 void checkasm_check_vf_hflip(void);
+void checkasm_check_vf_interlace(void);
 void checkasm_check_vf_threshold(void);
 void checkasm_check_vp8dsp(void);
 void checkasm_check_vp9dsp(void);

tests/checkasm/vf_interlace.c

@@ -0,0 +1,78 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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 <string.h>
+#include "checkasm.h"
+#include "libavfilter/interlace.h"
+#include "libavutil/intreadwrite.h"
+
+#define WIDTH 256
+#define WIDTH_PADDED 256 + 32
+#define SRC_SIZE WIDTH_PADDED*3
+
+#define randomize_buffers(buf, size)      \
+    do {                                  \
+        int j;                            \
+        uint8_t *tmp_buf = (uint8_t *)buf;\
+        for (j = 0; j < size; j++)        \
+            tmp_buf[j] = rnd() & 0xFF;    \
+    } while (0)
+
+static void check_lowpass_line(int depth){
+    LOCAL_ALIGNED_32(uint8_t, src,     [SRC_SIZE]);
+    LOCAL_ALIGNED_32(uint8_t, dst_ref, [WIDTH_PADDED]);
+    LOCAL_ALIGNED_32(uint8_t, dst_new, [WIDTH_PADDED]);
+    int w = WIDTH;
+    int mref = WIDTH_PADDED * -1;
+    int pref = WIDTH_PADDED;
+    int i, depth_byte;
+    InterlaceContext s;
+
+    declare_func(void, uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
+                 ptrdiff_t mref, ptrdiff_t pref, int clip_max);
+
+    s.lowpass = 1;
+    s.lowpass = VLPF_LIN;
+    depth_byte = depth >> 3;
+    w /= depth_byte;
+
+    memset(src,     0, SRC_SIZE);
+    memset(dst_ref, 0, WIDTH_PADDED);
+    memset(dst_new, 0, WIDTH_PADDED);
+    randomize_buffers(src, SRC_SIZE);
+
+    ff_interlace_init(&s, depth);
+
+    if (check_func(s.lowpass_line, "lowpass_line_%d", depth)) {
+        for (i = 0; i < 32; i++) { /* simulate crop */
+            call_ref(dst_ref, w, src + WIDTH_PADDED, mref - i*depth_byte, pref, 0);
+            call_new(dst_new, w, src + WIDTH_PADDED, mref - i*depth_byte, pref, 0);
+            if (memcmp(dst_ref, dst_new, WIDTH - i))
+                fail();
+        }
+        bench_new(dst_new, w, src + WIDTH_PADDED, mref, pref, 0);
+    }
+}
+void checkasm_check_vf_interlace(void)
+{
+    check_lowpass_line(8);
+    report("lowpass_line_8");
+
+    check_lowpass_line(16);
+    report("lowpass_line_16");
+}

tests/fate/checkasm.mak

@@ -23,6 +23,7 @@ FATE_CHECKASM = fate-checkasm-aacpsdsp                                  \
                 fate-checkasm-vf_blend                                  \
                 fate-checkasm-vf_colorspace                             \
                 fate-checkasm-vf_hflip                                  \
+                fate-checkasm-vf_interlace                              \
                 fate-checkasm-vf_threshold                              \
                 fate-checkasm-videodsp                                  \
                 fate-checkasm-vp8dsp                                    \