[FFmpeg-devel] [PATCH 2/3] tests/checkasm: add check for vf_colordetect

[Niklas Haas <ffmpeg@haasn.xyz>]

From: Niklas Haas <git@haasn.dev>

---
 tests/checkasm/Makefile         |   1 +
 tests/checkasm/checkasm.c       |   3 +
 tests/checkasm/checkasm.h       |   1 +
 tests/checkasm/vf_colordetect.c | 129 ++++++++++++++++++++++++++++++++
 4 files changed, 134 insertions(+)
 create mode 100644 tests/checkasm/vf_colordetect.c

diff --git a/tests/checkasm/Makefile b/tests/checkasm/Makefile
index afd62d95ba..d8328ecc68 100644
--- a/tests/checkasm/Makefile
+++ b/tests/checkasm/Makefile
@@ -55,6 +55,7 @@ CHECKASMOBJS-$(CONFIG_AVCODEC)          += $(AVCODECOBJS-yes)
 AVFILTEROBJS-$(CONFIG_AFIR_FILTER) += af_afir.o
 AVFILTEROBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o
 AVFILTEROBJS-$(CONFIG_BWDIF_FILTER)      += vf_bwdif.o
+AVFILTEROBJS-$(CONFIG_COLORDETECT_FILTER)+= vf_colordetect.o
 AVFILTEROBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o
 AVFILTEROBJS-$(CONFIG_EQ_FILTER)         += vf_eq.o
 AVFILTEROBJS-$(CONFIG_GBLUR_FILTER)      += vf_gblur.o
diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c
index f4e3d4f433..e01994768e 100644
--- a/tests/checkasm/checkasm.c
+++ b/tests/checkasm/checkasm.c
@@ -269,6 +269,9 @@ static const struct {
     #if CONFIG_BWDIF_FILTER
         { "vf_bwdif", checkasm_check_vf_bwdif },
     #endif
+    #if CONFIG_COLORDETECT_FILTER
+        { "vf_colordetect", checkasm_check_colordetect },
+    #endif
     #if CONFIG_COLORSPACE_FILTER
         { "vf_colorspace", checkasm_check_colorspace },
     #endif
diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index e829942d58..0b3e238318 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -89,6 +89,7 @@ void checkasm_check_av_tx(void);
 void checkasm_check_blend(void);
 void checkasm_check_blockdsp(void);
 void checkasm_check_bswapdsp(void);
+void checkasm_check_colordetect(void);
 void checkasm_check_colorspace(void);
 void checkasm_check_diracdsp(void);
 void checkasm_check_exrdsp(void);
diff --git a/tests/checkasm/vf_colordetect.c b/tests/checkasm/vf_colordetect.c
new file mode 100644
index 0000000000..ac505041f6
--- /dev/null
+++ b/tests/checkasm/vf_colordetect.c
@@ -0,0 +1,129 @@
+/*
+ * 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/vf_colordetect.h"
+#include "libavutil/mem_internal.h"
+
+#define WIDTH  256
+#define HEIGHT 16
+#define STRIDE (WIDTH + 32)
+
+static void check_range_detect(int depth)
+{
+    const int mpeg_min =  16 << (depth - 8);
+    const int mpeg_max = 235 << (depth - 8);
+
+    FFColorDetectDSPContext dsp = {0};
+    ff_color_detect_dsp_init(&dsp, depth, AVCOL_RANGE_UNSPECIFIED);
+
+    declare_func(int, const uint8_t *, ptrdiff_t, ptrdiff_t, ptrdiff_t, int, int);
+
+    /* Initialize to 128, which should always return 0 */
+    LOCAL_ALIGNED_32(uint8_t, in, [HEIGHT * STRIDE]);
+    memset(in, 0x80, HEIGHT * STRIDE);
+
+    /* Place an out-of-range value in a random position near the center */
+    const int h2 = HEIGHT >> 1;
+    int idx0 = ((rnd() % h2) + h2) * STRIDE + (rnd() % WIDTH);
+    if (depth > 8) {
+        idx0 &= ~1;
+        in[idx0] = in[idx0 + 1] = 0;
+    } else {
+        in[idx0] = 0;
+    }
+
+    int w = WIDTH;
+    if (depth > 8)
+        w /= 2;
+
+    if (check_func(dsp.detect_range, "rangedetect%d", depth)) {
+        /* Test increasing height, to ensure we hit the placed 0 eventually */
+        for (int h = 1; h <= HEIGHT; h++) {
+            int res_ref = call_ref(in, STRIDE, w, h, mpeg_min, mpeg_max);
+            int res_new = call_new(in, STRIDE, w, h, mpeg_min, mpeg_max);
+            if (res_ref != res_new)
+                fail();
+        }
+
+        /* Test performance of base case without any out-of-range values */
+        memset(in, 0x80, HEIGHT * STRIDE);
+        bench_new(in, STRIDE, w, HEIGHT, mpeg_min, mpeg_max);
+    }
+}
+
+static void check_alpha_detect(int depth, enum AVColorRange range)
+{
+    const int mpeg_min =  16 << (depth - 8);
+    const int mpeg_max = 235 << (depth - 8);
+    const int p = (1 << depth) - 1;
+    const int q = mpeg_max - mpeg_min;
+    const int k = -mpeg_min * p - 128;
+
+    FFColorDetectDSPContext dsp = {0};
+    ff_color_detect_dsp_init(&dsp, depth, range);
+
+    declare_func(int, const uint8_t *, ptrdiff_t, const uint8_t *, ptrdiff_t,
+                      ptrdiff_t, ptrdiff_t, int p, int q, int k);
+
+    LOCAL_ALIGNED_32(uint8_t, luma,  [HEIGHT * STRIDE]);
+    LOCAL_ALIGNED_32(uint8_t, alpha, [HEIGHT * STRIDE]);
+    /* Try and force overflow */
+    memset(luma,  0xFE, HEIGHT * STRIDE);
+    memset(alpha, 0xFF, HEIGHT * STRIDE);
+
+    /* Place an out-of-range value in a random position near the center */
+    const int h2 = HEIGHT >> 1;
+    int idx0 = ((rnd() % h2) + h2) * STRIDE + (rnd() % WIDTH);
+    if (depth > 8) {
+        idx0 &= ~1;
+        alpha[idx0] = alpha[idx0 + 1] = 0;
+    } else {
+        alpha[idx0] = 0;
+    }
+
+    int w = WIDTH;
+    if (depth > 8)
+        w /= 2;
+
+    if (check_func(dsp.detect_alpha, "alphadetect%d_%s", depth, range == AVCOL_RANGE_JPEG ? "full" : "limited")) {
+        /* Test increasing height, to ensure we hit the placed 0 eventually */
+        for (int h = 1; h <= HEIGHT; h++) {
+            int res_ref = call_ref(luma, STRIDE, alpha, STRIDE, w, h, p, q, k);
+            int res_new = call_new(luma, STRIDE, alpha, STRIDE, w, h, p, q, k);
+            if (res_ref != res_new)
+                fail();
+        }
+
+        /* Test performance of base case without any out-of-range values */
+        memset(alpha, 0xFF, HEIGHT * STRIDE);
+        bench_new(luma, STRIDE, alpha, STRIDE, w, HEIGHT, p, q, k);
+    }
+}
+
+void checkasm_check_colordetect(void)
+{
+    for (int depth = 8; depth <= 16; depth += 8) {
+        check_range_detect(depth);
+        check_alpha_detect(depth, AVCOL_RANGE_JPEG);
+        check_alpha_detect(depth, AVCOL_RANGE_MPEG);
+        report("colordetect%d", depth);
+    }
+}
-- 
2.50.1

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