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 "dnn_backend_native_layer_depth2space.h"
28
ff_dnn_load_layer_depth2space(Layer * layer,AVIOContext * model_file_context,int file_size,int operands_num)29 int ff_dnn_load_layer_depth2space(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
30 {
31 DepthToSpaceParams *params;
32 int dnn_size = 0;
33 params = av_malloc(sizeof(*params));
34 if (!params)
35 return 0;
36
37 params->block_size = (int32_t)avio_rl32(model_file_context);
38 dnn_size += 4;
39 layer->input_operand_indexes[0] = (int32_t)avio_rl32(model_file_context);
40 layer->output_operand_index = (int32_t)avio_rl32(model_file_context);
41 dnn_size += 8;
42 layer->params = params;
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_depth2space(DnnOperand * operands,const int32_t * input_operand_indexes,int32_t output_operand_index,const void * parameters,NativeContext * ctx)51 int ff_dnn_execute_layer_depth2space(DnnOperand *operands, const int32_t *input_operand_indexes,
52 int32_t output_operand_index, const void *parameters, NativeContext *ctx)
53 {
54 float *output;
55 const DepthToSpaceParams *params = parameters;
56 int block_size = params->block_size;
57 int32_t input_operand_index = input_operand_indexes[0];
58 int number = operands[input_operand_index].dims[0];
59 int height = operands[input_operand_index].dims[1];
60 int width = operands[input_operand_index].dims[2];
61 int channels = operands[input_operand_index].dims[3];
62 const float *input = operands[input_operand_index].data;
63
64 int y, x, by, bx, ch;
65 int new_channels = channels / (block_size * block_size);
66 int output_linesize = width * channels;
67 int by_linesize = output_linesize / block_size;
68 int x_linesize = new_channels * block_size;
69
70 DnnOperand *output_operand = &operands[output_operand_index];
71 output_operand->dims[0] = number;
72 output_operand->dims[1] = height * block_size;
73 output_operand->dims[2] = width * block_size;
74 output_operand->dims[3] = new_channels;
75 output_operand->data_type = operands[input_operand_index].data_type;
76 output_operand->length = ff_calculate_operand_data_length(output_operand);
77 if (output_operand->length <= 0) {
78 av_log(ctx, AV_LOG_ERROR, "The output data length overflow\n");
79 return AVERROR(EINVAL);
80 }
81 output_operand->data = av_realloc(output_operand->data, output_operand->length);
82 if (!output_operand->data) {
83 av_log(ctx, AV_LOG_ERROR, "Failed to reallocate memory for output\n");
84 return AVERROR(ENOMEM);
85 }
86 output = output_operand->data;
87
88 for (y = 0; y < height; ++y){
89 for (x = 0; x < width; ++x){
90 for (by = 0; by < block_size; ++by){
91 for (bx = 0; bx < block_size; ++bx){
92 for (ch = 0; ch < new_channels; ++ch){
93 output[by * by_linesize + x * x_linesize + bx * new_channels + ch] = input[ch];
94 }
95 input += new_channels;
96 }
97 }
98 }
99 output += output_linesize;
100 }
101 return 0;
102 }
103