1 // Copyright (C) 2018 Intel Corporation
3 // SPDX-License-Identifier: Apache-2.0
7 * @brief A header file that provides a set of convenience utility functions and the main include file for all other .h files.
8 * @file inference_engine.hpp
19 #include <ie_error.hpp>
20 #include <ie_layers.h>
21 #include <ie_device.hpp>
22 #include <ie_plugin_dispatcher.hpp>
23 #include <ie_plugin_config.hpp>
24 #include <cpp/ie_cnn_net_reader.h>
25 #include <cpp/ie_plugin_cpp.hpp>
26 #include <cpp/ie_executable_network.hpp>
27 #include <ie_version.hpp>
29 namespace InferenceEngine {
31 * @brief Gets the top n results from a tblob
32 * @param n Top n count
33 * @param input 1D tblob that contains probabilities
34 * @param output Vector of indexes for the top n places
37 inline void TopResults(unsigned int n, TBlob<T> &input, std::vector<unsigned> &output) {
38 size_t input_rank = input.dims().size();
39 if (!input_rank || !input.dims().at(input_rank - 1))
40 THROW_IE_EXCEPTION << "Input blob has incorrect dimensions!";
41 size_t batchSize = input.dims().at(input_rank - 1);
42 std::vector<unsigned> indexes(input.size() / batchSize);
44 n = static_cast<unsigned>(std::min<size_t>((size_t) n, input.size()));
46 output.resize(n * batchSize);
48 for (size_t i = 0; i < batchSize; i++) {
49 size_t offset = i * (input.size() / batchSize);
50 T *batchData = input.data();
53 std::iota(std::begin(indexes), std::end(indexes), 0);
54 std::partial_sort(std::begin(indexes), std::begin(indexes) + n, std::end(indexes),
55 [&batchData](unsigned l, unsigned r) {
56 return batchData[l] > batchData[r];
58 for (unsigned j = 0; j < n; j++) {
59 output.at(i * n + j) = indexes.at(j);
64 #define TBLOB_TOP_RESULT(precision)\
65 case InferenceEngine::Precision::precision : {\
66 using myBlobType = InferenceEngine::PrecisionTrait<Precision::precision>::value_type;\
67 TBlob<myBlobType> &tblob = dynamic_cast<TBlob<myBlobType> &>(input);\
68 TopResults(n, tblob, output);\
73 * @brief Gets the top n results from a blob
74 * @param n Top n count
75 * @param input 1D blob that contains probabilities
76 * @param output Vector of indexes for the top n places
78 inline void TopResults(unsigned int n, Blob &input, std::vector<unsigned> &output) {
79 switch (input.precision()) {
80 TBLOB_TOP_RESULT(FP32);
81 TBLOB_TOP_RESULT(FP16);
82 TBLOB_TOP_RESULT(Q78);
83 TBLOB_TOP_RESULT(I16);
86 TBLOB_TOP_RESULT(U16);
87 TBLOB_TOP_RESULT(I32);
89 THROW_IE_EXCEPTION << "cannot locate blob for precision: " << input.precision();
93 #undef TBLOB_TOP_RESULT
96 * @brief Copies a 8-bit RGB image to the blob.
97 * Throws an exception in case of dimensions or input size mismatch
98 * @tparam data_t Type of the target blob
99 * @param RGB8 8-bit RGB image
100 * @param RGB8_size Size of the image
101 * @param blob Target blob to write image to
103 template<typename data_t>
104 void copyFromRGB8(uint8_t *RGB8, size_t RGB8_size, InferenceEngine::TBlob<data_t> *blob) {
105 if (4 != blob->dims().size())
106 THROW_IE_EXCEPTION << "Cannot write data to input blob! Blob has incorrect dimensions size "
107 << blob->dims().size();
108 size_t num_channels = blob->dims()[2]; // because RGB
109 size_t num_images = blob->dims()[3];
110 size_t w = blob->dims()[0];
111 size_t h = blob->dims()[1];
112 size_t nPixels = w * h;
114 if (RGB8_size != w * h * num_channels * num_images)
115 THROW_IE_EXCEPTION << "input pixels mismatch, expecting " << w * h * num_channels * num_images
116 << " bytes, got: " << RGB8_size;
118 std::vector<data_t *> dataArray;
119 for (unsigned int n = 0; n < num_images; n++) {
120 for (unsigned int i = 0; i < num_channels; i++) {
121 if (!n && !i && dataArray.empty()) {
122 dataArray.push_back(blob->data());
124 dataArray.push_back(dataArray.at(n * num_channels + i - 1) + nPixels);
128 for (size_t n = 0; n < num_images; n++) {
129 size_t n_num_channels = n * num_channels;
130 size_t n_num_channels_nPixels = n_num_channels * nPixels;
131 for (size_t i = 0; i < nPixels; i++) {
132 size_t i_num_channels = i * num_channels + n_num_channels_nPixels;
133 for (size_t j = 0; j < num_channels; j++) {
134 dataArray.at(n_num_channels + j)[i] = RGB8[i_num_channels + j];
141 * @brief Splits the RGB channels to either I16 Blob or float blob.
142 * The image buffer is assumed to be packed with no support for strides.
143 * @param imgBufRGB8 Packed 24bit RGB image (3 bytes per pixel: R-G-B)
144 * @param lengthbytesSize Size in bytes of the RGB image. It is equal to amount of pixels times 3 (number of channels)
145 * @param input Blob to contain the split image (to 3 channels)
147 inline void ConvertImageToInput(unsigned char *imgBufRGB8, size_t lengthbytesSize, Blob &input) {
148 TBlob<float> *float_input = dynamic_cast<TBlob<float> *>(&input);
149 if (float_input != nullptr) copyFromRGB8(imgBufRGB8, lengthbytesSize, float_input);
151 TBlob<short> *short_input = dynamic_cast<TBlob<short> *>(&input);
152 if (short_input != nullptr) copyFromRGB8(imgBufRGB8, lengthbytesSize, short_input);
154 TBlob<uint8_t> *byte_input = dynamic_cast<TBlob<uint8_t> *>(&input);
155 if (byte_input != nullptr) copyFromRGB8(imgBufRGB8, lengthbytesSize, byte_input);
159 * @brief Copies data from a certain precision to float
160 * @param dst Pointer to an output float buffer, must be allocated before the call
161 * @param src Source blob to take data from
164 void copyToFloat(float *dst, const InferenceEngine::Blob *src) {
168 const InferenceEngine::TBlob<T> *t_blob = dynamic_cast<const InferenceEngine::TBlob<T> *>(src);
169 if (t_blob == nullptr) {
170 THROW_IE_EXCEPTION << "input type is " << src->precision() << " but input is not " << typeid(T).name();
173 const T *srcPtr = t_blob->readOnly();
174 if (srcPtr == nullptr) {
175 THROW_IE_EXCEPTION << "Input data was not allocated.";
177 for (size_t i = 0; i < t_blob->size(); i++) dst[i] = srcPtr[i];
181 } // namespace InferenceEngine