1 /*
2 * Copyright (c) 2018 Sergey Lavrushkin
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 "libavutil/avassert.h"
28 #include "dnn_backend_native_layer_depth2space.h"
29
ff_dnn_load_layer_depth2space(Layer * layer,AVIOContext * model_file_context,int file_size,int operands_num)30 int ff_dnn_load_layer_depth2space(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
31 {
32 DepthToSpaceParams *params;
33 int dnn_size = 0;
34 params = av_malloc(sizeof(*params));
35 if (!params)
36 return 0;
37
38 params->block_size = (int32_t)avio_rl32(model_file_context);
39 dnn_size += 4;
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 layer->params = params;
44
45 if (layer->input_operand_indexes[0] >= operands_num || layer->output_operand_index >= operands_num) {
46 return 0;
47 }
48
49 return dnn_size;
50 }
51
ff_dnn_execute_layer_depth2space(DnnOperand * operands,const int32_t * input_operand_indexes,int32_t output_operand_index,const void * parameters,NativeContext * ctx)52 int ff_dnn_execute_layer_depth2space(DnnOperand *operands, const int32_t *input_operand_indexes,
53 int32_t output_operand_index, const void *parameters, NativeContext *ctx)
54 {
55 float *output;
56 const DepthToSpaceParams *params = parameters;
57 int block_size = params->block_size;
58 int32_t input_operand_index = input_operand_indexes[0];
59 int number = operands[input_operand_index].dims[0];
60 int height = operands[input_operand_index].dims[1];
61 int width = operands[input_operand_index].dims[2];
62 int channels = operands[input_operand_index].dims[3];
63 const float *input = operands[input_operand_index].data;
64
65 int y, x, by, bx, ch;
66 int new_channels = channels / (block_size * block_size);
67 int output_linesize = width * channels;
68 int by_linesize = output_linesize / block_size;
69 int x_linesize = new_channels * block_size;
70
71 DnnOperand *output_operand = &operands[output_operand_index];
72 output_operand->dims[0] = number;
73 output_operand->dims[1] = height * block_size;
74 output_operand->dims[2] = width * block_size;
75 output_operand->dims[3] = new_channels;
76 output_operand->data_type = operands[input_operand_index].data_type;
77 output_operand->length = ff_calculate_operand_data_length(output_operand);
78 if (output_operand->length <= 0) {
79 av_log(ctx, AV_LOG_ERROR, "The output data length overflow\n");
80 return DNN_ERROR;
81 }
82 output_operand->data = av_realloc(output_operand->data, output_operand->length);
83 if (!output_operand->data) {
84 av_log(ctx, AV_LOG_ERROR, "Failed to reallocate memory for output\n");
85 return DNN_ERROR;
86 }
87 output = output_operand->data;
88
89 for (y = 0; y < height; ++y){
90 for (x = 0; x < width; ++x){
91 for (by = 0; by < block_size; ++by){
92 for (bx = 0; bx < block_size; ++bx){
93 for (ch = 0; ch < new_channels; ++ch){
94 output[by * by_linesize + x * x_linesize + bx * new_channels + ch] = input[ch];
95 }
96 input += new_channels;
97 }
98 }
99 }
100 output += output_linesize;
101 }
102 return 0;
103 }
104