FFmpeg  4.3
dnn_backend_native_layer_pad.c
Go to the documentation of this file.
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 #include <string.h>
22 #include "libavutil/avassert.h"
24 
25 int dnn_load_layer_pad(Layer *layer, AVIOContext *model_file_context, int file_size)
26 {
27  LayerPadParams *params;
28  int dnn_size = 0;
29  params = av_malloc(sizeof(*params));
30  if (!params)
31  return 0;
32 
33  params->mode = (int32_t)avio_rl32(model_file_context);
34  dnn_size += 4;
35  for (int i = 0; i < 4; ++i) {
36  params->paddings[i][0] = avio_rl32(model_file_context);
37  params->paddings[i][1] = avio_rl32(model_file_context);
38  dnn_size += 8;
39  }
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  return dnn_size;
46 }
47 
48 static int before_get_buddy(int given, int paddings, LayerPadModeParam mode)
49 {
50  if (mode == LPMP_SYMMETRIC) {
51  return (2 * paddings - 1 - given);
52  } else if (mode == LPMP_REFLECT) {
53  return (2 * paddings - given);
54  } else {
55  av_assert0(!"should not reach here");
56  return 0;
57  }
58 }
59 
60 static int after_get_buddy(int given, int border, LayerPadModeParam mode)
61 {
62  if (mode == LPMP_SYMMETRIC) {
63  int offset = given - border;
64  return (border - 1 - offset);
65  } else if (mode == LPMP_REFLECT) {
66  int offset = given - border;
67  return (border - 2 - offset);
68  } else {
69  av_assert0(!"should not reach here");
70  return 0;
71  }
72 }
73 
74 int dnn_execute_layer_pad(DnnOperand *operands, const int32_t *input_operand_indexes,
75  int32_t output_operand_index, const void *parameters)
76 {
77  int32_t before_paddings;
78  int32_t after_paddings;
79  float* output;
80  const LayerPadParams *params = (const LayerPadParams *)parameters;
81 
82  // suppose format is <N, H, W, C>
83  int32_t input_operand_index = input_operand_indexes[0];
84  int number = operands[input_operand_index].dims[0];
85  int height = operands[input_operand_index].dims[1];
86  int width = operands[input_operand_index].dims[2];
87  int channel = operands[input_operand_index].dims[3];
88  const float *input = operands[input_operand_index].data;
89 
90  int new_number = number + params->paddings[0][0] + params->paddings[0][1];
91  int new_height = height + params->paddings[1][0] + params->paddings[1][1];
92  int new_width = width + params->paddings[2][0] + params->paddings[2][1];
93  int new_channel = channel + params->paddings[3][0] + params->paddings[3][1];
94 
95  int c_stride = channel;
96  int wc_stride = c_stride * width;
97  int hwc_stride = wc_stride * height;
98 
99  int new_c_stride = new_channel;
100  int new_wc_stride = new_c_stride * new_width;
101  int new_hwc_stride = new_wc_stride * new_height;
102 
103  DnnOperand *output_operand = &operands[output_operand_index];
104  output_operand->dims[0] = new_number;
105  output_operand->dims[1] = new_height;
106  output_operand->dims[2] = new_width;
107  output_operand->dims[3] = new_channel;
108  output_operand->data_type = operands[input_operand_index].data_type;
109  output_operand->length = calculate_operand_data_length(output_operand);
110  output_operand->data = av_realloc(output_operand->data, output_operand->length);
111  if (!output_operand->data)
112  return -1;
113  output = output_operand->data;
114 
115  // copy the original data
116  for (int n = 0; n < number; n++) {
117  for (int h = 0; h < height; h++) {
118  for (int w = 0; w < width; w++) {
119  const float *src = input + n * hwc_stride + h * wc_stride + w * c_stride;
120  float *dst = output + (n + params->paddings[0][0]) * new_hwc_stride
121  + (h + params->paddings[1][0]) * new_wc_stride
122  + (w + params->paddings[2][0]) * new_c_stride
123  + params->paddings[3][0];
124  memcpy(dst, src, channel * sizeof(float));
125  }
126  }
127  }
128 
129  // handle the first dimension
130  before_paddings = params->paddings[0][0];
131  after_paddings = params->paddings[0][1];
132  for (int n = 0; n < before_paddings; n++) {
133  float *dst = output + n * new_hwc_stride;
134  if (params->mode == LPMP_CONSTANT) {
135  for (int i = 0; i < new_hwc_stride; i++) {
136  dst[i] = params->constant_values;
137  }
138  }
139  else {
140  int buddy = before_get_buddy(n, before_paddings, params->mode);
141  float *src = output + buddy * new_hwc_stride;
142  memcpy(dst, src, new_hwc_stride * sizeof(float));
143  }
144  }
145  for (int n = 0; n < after_paddings; n++) {
146  int given = number + before_paddings + n;
147  float *dst = output + given * new_hwc_stride;
148  if (params->mode == LPMP_CONSTANT) {
149  for (int i = 0; i < new_hwc_stride; i++) {
150  dst[i] = params->constant_values;
151  }
152  } else {
153  int buddy = after_get_buddy(given, number + before_paddings, params->mode);
154  float *src = output + buddy * new_hwc_stride;
155  memcpy(dst, src, new_hwc_stride * sizeof(float));
156  }
157  }
158 
159  // handle the second dimension
160  before_paddings = params->paddings[1][0];
161  after_paddings = params->paddings[1][1];
162  for (int n = 0; n < new_number; n++) {
163  float *start = output + n * new_hwc_stride;
164  for (int h = 0; h < before_paddings; h++) {
165  float *dst = start + h * new_wc_stride;
166  if (params->mode == LPMP_CONSTANT) {
167  for (int i = 0; i < new_wc_stride; i++) {
168  dst[i] = params->constant_values;
169  }
170  } else {
171  int buddy = before_get_buddy(h, before_paddings, params->mode);
172  float *src = start + buddy * new_wc_stride;
173  memcpy(dst, src, new_wc_stride * sizeof(float));
174  }
175  }
176  for (int h = 0; h < after_paddings; h++) {
177  int given = height + before_paddings + h;
178  float *dst = start + given * new_wc_stride;
179  if (params->mode == LPMP_CONSTANT) {
180  for (int i = 0; i < new_wc_stride; i++) {
181  dst[i] = params->constant_values;
182  }
183  } else {
184  int buddy = after_get_buddy(given, height + before_paddings, params->mode);
185  float *src = start + buddy * new_wc_stride;
186  memcpy(dst, src, new_wc_stride * sizeof(float));
187  }
188  }
189  }
190 
191  // handle the third dimension
192  before_paddings = params->paddings[2][0];
193  after_paddings = params->paddings[2][1];
194  for (int n = 0; n < new_number; n++) {
195  for (int h = 0; h < new_height; h++) {
196  float *start = output + n * new_hwc_stride + h * new_wc_stride;
197  for (int w = 0; w < before_paddings; w++) {
198  float *dst = start + w * new_c_stride;
199  if (params->mode == LPMP_CONSTANT) {
200  for (int i = 0; i < new_c_stride; i++) {
201  dst[i] = params->constant_values;
202  }
203  } else {
204  int buddy = before_get_buddy(w, before_paddings, params->mode);
205  float *src = start + buddy * new_c_stride;
206  memcpy(dst, src, new_c_stride * sizeof(float));
207  }
208  }
209  for (int w = 0; w < after_paddings; w++) {
210  int given = width + before_paddings + w;
211  float *dst = start + given * new_c_stride;
212  if (params->mode == LPMP_CONSTANT) {
213  for (int i = 0; i < new_c_stride; i++) {
214  dst[i] = params->constant_values;
215  }
216  } else {
217  int buddy = after_get_buddy(given, width + before_paddings, params->mode);
218  float *src = start + buddy * new_c_stride;
219  memcpy(dst, src, new_c_stride * sizeof(float));
220  }
221  }
222  }
223  }
224 
225  // handle the fourth dimension
226  before_paddings = params->paddings[3][0];
227  after_paddings = params->paddings[3][1];
228  for (int n = 0; n < new_number; n++) {
229  for (int h = 0; h < new_height; h++) {
230  for (int w = 0; w < new_width; w++) {
231  float *start = output + n * new_hwc_stride + h * new_wc_stride + w * new_c_stride;
232  for (int c = 0; c < before_paddings; c++) {
233  float *dst = start + c;
234  if (params->mode == LPMP_CONSTANT) {
235  *dst = params->constant_values;
236  } else {
237  int buddy = before_get_buddy(c, before_paddings, params->mode);
238  float *src = start + buddy;
239  *dst = *src;
240  }
241  }
242  for (int c = 0; c < after_paddings; c++) {
243  int given = channel + before_paddings + c;
244  float *dst = start + given;
245  if (params->mode == LPMP_CONSTANT) {
246  *dst = params->constant_values;
247  } else {
248  int buddy = after_get_buddy(given, channel + before_paddings, params->mode);
249  float *src = start + buddy;
250  *dst = *src;
251  }
252  }
253  }
254  }
255  }
256 
257  return 0;
258 }
Bytestream IO Context.
Definition: avio.h:161
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
int32_t input_operand_indexes[4]
a layer can have multiple inputs and one output.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define av_malloc(s)
#define height
DNNDataType data_type
support different kinds of data type such as float, half float, int8 etc, first support float now...
#define src
Definition: vp8dsp.c:254
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
void * data
data pointer with data length in bytes.
simple assert() macros that are a bit more flexible than ISO C assert().
int32_t dims[4]
there are two memory layouts, NHWC or NCHW, so we use dims, dims[0] is Number.
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
#define width
uint8_t w
Definition: llviddspenc.c:38
static int after_get_buddy(int given, int border, LayerPadModeParam mode)
int32_t
int dnn_execute_layer_pad(DnnOperand *operands, const int32_t *input_operand_indexes, int32_t output_operand_index, const void *parameters)
static int before_get_buddy(int given, int paddings, LayerPadModeParam mode)
layer pad (equivalent to tf.pad) for native backend.
int dnn_load_layer_pad(Layer *layer, AVIOContext *model_file_context, int file_size)
static double c[64]
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
int32_t calculate_operand_data_length(const DnnOperand *oprd)
void * params
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
int32_t output_operand_index