FFmpeg  4.3.9
dnn_backend_native_layer_mathunary.c
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1 /*
2  * Copyright (c) 2020
3  *
4  * This file is part of FFmpeg.
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19  */
20 
21 /**
22  * @file
23  * DNN native backend implementation.
24  */
25 
26 #include "dnn_backend_native.h"
27 #include "libavutil/avassert.h"
29 
30 int dnn_load_layer_math_unary(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
31 {
33  int dnn_size = 0;
34  params = av_malloc(sizeof(*params));
35  if(!params)
36  return 0;
37 
38  params->un_op = (int32_t)avio_rl32(model_file_context);
39  dnn_size += 4;
40  layer->params = params;
41  layer->input_operand_indexes[0] = (int32_t)avio_rl32(model_file_context);
42  layer->output_operand_index = (int32_t)avio_rl32(model_file_context);
43  dnn_size += 8;
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 }
52 
53 int dnn_execute_layer_math_unary(DnnOperand *operands, const int32_t *input_operand_indexes,
54  int32_t output_operand_index, const void *parameters)
55 {
56  const DnnOperand *input = &operands[input_operand_indexes[0]];
57  DnnOperand *output = &operands[output_operand_index];
58  const DnnLayerMathUnaryParams *params = (const DnnLayerMathUnaryParams *)parameters;
59  int dims_count;
60  const float *src;
61  float *dst;
62 
63  for (int i = 0; i < 4; ++i)
64  output->dims[i] = input->dims[i];
65 
66  output->data_type = input->data_type;
67  output->length = calculate_operand_data_length(output);
68  if (output->length <= 0)
69  return DNN_ERROR;
70  output->data = av_realloc(output->data, output->length);
71  if (!output->data)
72  return DNN_ERROR;
73 
74  dims_count = calculate_operand_dims_count(output);
75  src = input->data;
76  dst = output->data;
77 
78  switch (params->un_op) {
79  case DMUO_ABS:
80  for (int i = 0; i < dims_count; ++i)
81  dst[i] = FFABS(src[i]);
82  return 0;
83  default:
84  return -1;
85  }
86 }
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:134
DNN inference functions interface for native backend.
int32_t calculate_operand_dims_count(const DnnOperand *oprd)
int32_t input_operand_indexes[4]
a layer can have multiple inputs and one output.
#define av_malloc(s)
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.
int32_t
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
DNN inference functions interface for native backend.
int dnn_load_layer_math_unary(Layer *layer, AVIOContext *model_file_context, int file_size, int operands_num)
int32_t calculate_operand_data_length(const DnnOperand *oprd)
void * params
int dnn_execute_layer_math_unary(DnnOperand *operands, const int32_t *input_operand_indexes, int32_t output_operand_index, const void *parameters)
int32_t output_operand_index