--- /dev/null
+/*
+ * Copyright (c) 2020
+ *
+ * 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 <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "libavfilter/dnn/dnn_backend_native_layer_mathunary.h"
+#include "libavutil/avassert.h"
+
+#define EPS 0.00001
+
+static float get_expected(float f, DNNMathUnaryOperation op)
+{
+ switch (op)
+ {
+ case DMUO_ABS:
+ return (f >= 0) ? f : -f;
+ default:
+ av_assert0(!"not supported yet");
+ return 0.f;
+ }
+}
+
+static int test(DNNMathUnaryOperation op)
+{
+ DnnLayerMathUnaryParams params;
+ DnnOperand operands[2];
+ int32_t input_indexes[1];
+ float input[1*1*2*3] = {
+ -3, 2.5, 2, -2.1, 7.8, 100};
+ float *output;
+
+ params.un_op = op;
+
+ operands[0].data = input;
+ operands[0].dims[0] = 1;
+ operands[0].dims[1] = 1;
+ operands[0].dims[2] = 2;
+ operands[0].dims[3] = 3;
+ operands[1].data = NULL;
+
+ input_indexes[0] = 0;
+ dnn_execute_layer_math_unary(operands, input_indexes, 1, ¶ms);
+
+ output = operands[1].data;
+ for (int i = 0; i < sizeof(input) / sizeof(float); ++i) {
+ float expected_output = get_expected(input[i], op);
+ if(fabs(output[i] - expected_output) > EPS) {
+ printf("at index %d, output: %f, expected_output: %f\n", i, output[i], expected_output);
+ av_freep(&output);
+ return 1;
+ }
+ }
+
+ av_freep(&output);
+ return 0;
+}
+
+int main(int agrc, char **argv)
+{
+ if (test(DMUO_ABS))
+ return 1;
+ return 0;
+}