+/*
+ * Copyright (c) 2019 Guo Yejun
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * DNN native backend implementation.
+ */
+
+#include "dnn_backend_native.h"
+#include "libavutil/avassert.h"
+#include "dnn_backend_native_layer_maximum.h"
+
+int dnn_execute_layer_maximum(DnnOperand *operands, const int32_t *input_operand_indexes, int32_t output_operand_index, const DnnLayerMaximumParams *params)
+{
+ const DnnOperand *input = &operands[input_operand_indexes[0]];
+ DnnOperand *output = &operands[output_operand_index];
+ int dims_count;
+ const float *src;
+ float *dst;
+
+ for (int i = 0; i < 4; ++i)
+ output->dims[i] = input->dims[i];
+
+ output->data_type = input->data_type;
+ output->length = calculate_operand_data_length(output);
+ output->data = av_realloc(output->data, output->length);
+ if (!output->data)
+ return DNN_ERROR;
+
+ dims_count = calculate_operand_dims_count(output);
+ src = input->data;
+ dst = output->data;
+ for (int i = 0; i < dims_count; ++i)
+ dst[i] = FFMAX(src[i], params->val.y);
+
+ return 0;
+}