FFmpeg
dnn_backend_native_layer_depth2space.c
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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"
28 
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 
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 DNN_ERROR;
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 DNN_ERROR;
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 }
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
ff_calculate_operand_data_length
int32_t ff_calculate_operand_data_length(const DnnOperand *oprd)
Definition: dnn_backend_native.c:499
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
width
#define width
DnnOperand::data
void * data
data pointer with data length in bytes.
Definition: dnn_backend_native.h:104
DnnOperand::data_type
DNNDataType data_type
support different kinds of data type such as float, half float, int8 etc, first support float now.
Definition: dnn_backend_native.h:85
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:33
dnn_backend_native_layer_depth2space.h
Layer::params
void * params
Definition: dnn_backend_native.h:66
ff_dnn_load_layer_depth2space
int ff_dnn_load_layer_depth2space(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
Load the Depth to Space Layer.
Definition: dnn_backend_native_layer_depth2space.c:29
DnnOperand::dims
int32_t dims[4]
there are two memory layouts, NHWC or NCHW, so we use dims, dims[0] is Number.
Definition: dnn_backend_native.h:74
DnnOperand::length
int32_t length
Definition: dnn_backend_native.h:105
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:742
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
Layer::output_operand_index
int32_t output_operand_index
Definition: dnn_backend_native.h:65
NativeContext
Definition: dnn_backend_native.h:118
Layer
Definition: dnn_backend_native.h:57
Layer::input_operand_indexes
int32_t input_operand_indexes[4]
a layer can have multiple inputs and one output.
Definition: dnn_backend_native.h:64
height
#define height
DepthToSpaceParams
Definition: dnn_backend_native_layer_depth2space.h:33
dnn_backend_native.h
input
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some input
Definition: filter_design.txt:172
av_realloc
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:152
DNN_ERROR
@ DNN_ERROR
Definition: dnn_interface.h:33
DepthToSpaceParams::block_size
int block_size
Definition: dnn_backend_native_layer_depth2space.h:34
DnnOperand
Definition: dnn_backend_native.h:69
ff_dnn_execute_layer_depth2space
int ff_dnn_execute_layer_depth2space(DnnOperand *operands, const int32_t *input_operand_indexes, int32_t output_operand_index, const void *parameters, NativeContext *ctx)
Execute the Depth to Space Layer.
Definition: dnn_backend_native_layer_depth2space.c:51
int32_t
int32_t
Definition: audioconvert.c:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28