1 /*
2 * Copyright (c) 2019 Guo Yejun
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * DNN native backend implementation.
24 */
25
26 #include "dnn_backend_native.h"
27 #include "dnn_backend_native_layer_maximum.h"
28
ff_dnn_load_layer_maximum(Layer * layer,AVIOContext * model_file_context,int file_size,int operands_num)29 int ff_dnn_load_layer_maximum(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
30 {
31 DnnLayerMaximumParams *params;
32 int dnn_size = 0;
33 params = av_malloc(sizeof(*params));
34 if (!params)
35 return 0;
36
37 params->val.u32 = avio_rl32(model_file_context);
38 dnn_size += 4;
39 layer->params = params;
40 layer->input_operand_indexes[0] = (int32_t)avio_rl32(model_file_context);
41 layer->output_operand_index = (int32_t)avio_rl32(model_file_context);
42 dnn_size += 8;
43
44 if (layer->input_operand_indexes[0] >= operands_num || layer->output_operand_index >= operands_num) {
45 return 0;
46 }
47
48 return dnn_size;
49 }
50
ff_dnn_execute_layer_maximum(DnnOperand * operands,const int32_t * input_operand_indexes,int32_t output_operand_index,const void * parameters,NativeContext * ctx)51 int ff_dnn_execute_layer_maximum(DnnOperand *operands, const int32_t *input_operand_indexes,
52 int32_t output_operand_index, const void *parameters, NativeContext *ctx)
53 {
54 const DnnOperand *input = &operands[input_operand_indexes[0]];
55 DnnOperand *output = &operands[output_operand_index];
56 const DnnLayerMaximumParams *params = parameters;
57 int dims_count;
58 const float *src;
59 float *dst;
60
61 for (int i = 0; i < 4; ++i)
62 output->dims[i] = input->dims[i];
63
64 output->data_type = input->data_type;
65 output->length = ff_calculate_operand_data_length(output);
66 if (output->length <= 0) {
67 av_log(ctx, AV_LOG_ERROR, "The output data length overflow\n");
68 return AVERROR(EINVAL);
69 }
70 output->data = av_realloc(output->data, output->length);
71 if (!output->data) {
72 av_log(ctx, AV_LOG_ERROR, "Failed to reallocate memory for output\n");
73 return AVERROR(ENOMEM);
74 }
75
76 dims_count = ff_calculate_operand_dims_count(output);
77 src = input->data;
78 dst = output->data;
79 for (int i = 0; i < dims_count; ++i)
80 dst[i] = FFMAX(src[i], params->val.y);
81
82 return 0;
83 }
84