Compute Library
 21.02
CLWarpPerspectiveKernel.cpp
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25 
30 #include "arm_compute/core/Error.h"
36 
37 #include <cstddef>
38 #include <set>
39 #include <sstream>
40 #include <string>
41 
42 using namespace arm_compute;
43 
44 namespace
45 {
46 inline void options_add_matrix(std::set<std::string> &options, const std::array<float, 9> &matrix)
47 {
48  for(size_t i = 0; i < 9; ++i)
49  {
50  std::stringstream mat_str;
51  mat_str << "-DMAT" << i << "=" << matrix[i] << " ";
52  options.insert(mat_str.str());
53  }
54 }
55 } // namespace
56 
58 {
59  return BorderSize(1);
60 }
61 
62 void CLWarpPerspectiveKernel::configure(const ICLTensor *input, ICLTensor *output, const std::array<float, 9> &matrix, InterpolationPolicy policy)
63 {
64  configure(CLKernelLibrary::get().get_compile_context(), input, output, matrix, policy);
65 }
66 
67 void CLWarpPerspectiveKernel::configure(const CLCompileContext &compile_context, const ICLTensor *input, ICLTensor *output, const std::array<float, 9> &matrix, InterpolationPolicy policy)
68 {
72 
73  _input = input;
74  _output = output;
75 
76  // Create build options
77  std::set<std::string> options;
78  options_add_matrix(options, matrix);
79  options.emplace(("-DDATA_TYPE=" + get_cl_type_from_data_type(input->info()->data_type())));
80 
81  // Create kernel
82  std::string interpolation_name = string_from_interpolation_policy(policy);
83  std::transform(interpolation_name.begin(), interpolation_name.end(), interpolation_name.begin(), ::tolower);
84  std::string kernel_name = "warp_perspective_" + interpolation_name;
85  _kernel = create_kernel(compile_context, kernel_name, options);
86 
87  // Set static kernel arguments
88  unsigned int idx = 2 * num_arguments_per_2D_tensor(); //Skip the input and output parameters
89  _kernel.setArg<cl_int>(idx++, input->info()->dimension(0));
90  _kernel.setArg<cl_int>(idx++, input->info()->dimension(1));
91 
92  // Configure kernel window
93  constexpr unsigned int num_elems_processed_per_iteration = 4;
94 
95  Window win = calculate_max_window(*output->info(), Steps(num_elems_processed_per_iteration));
96 
97  AccessWindowStatic input_access(input->info(), -border_size().left, -border_size().top, input->info()->dimension(0) + border_size().right, input->info()->dimension(1) + border_size().bottom);
99 
100  update_window_and_padding(win, input_access, output_access);
101 
102  output_access.set_valid_region(win, ValidRegion(Coordinates(), output->info()->tensor_shape()));
103 
104  ICLKernel::configure_internal(win);
105 }
unsigned int top
top of the border
Definition: Types.h:375
Window calculate_max_window(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
InterpolationPolicy
Interpolation method.
Definition: Types.h:392
void configure(const ICLTensor *input, ICLTensor *output, const std::array< float, 9 > &matrix, InterpolationPolicy policy)
Initialize the function&#39;s source, destination, interpolation policy and border_mode.
virtual size_t dimension(size_t index) const =0
Return the size of the requested dimension.
Container for 2D border size.
Definition: Types.h:273
BorderSize border_size() const override
The size of the border for that kernel.
1 channel, 1 U8 per channel
virtual DataType data_type() const =0
Data type used for each element of the tensor.
#define ARM_COMPUTE_ERROR_ON(cond)
If the condition is true then an error message is printed and an exception thrown.
Definition: Error.h:466
static CLKernelLibrary & get()
Access the KernelLibrary singleton.
unsigned int bottom
bottom of the border
Definition: Types.h:377
Copyright (c) 2017-2021 Arm Limited.
Implementation of a static rectangular access pattern.
std::string tolower(std::string string)
Convert string to lower case.
Definition: Utility.h:203
cl::Kernel create_kernel(const CLCompileContext &ctx, const std::string &kernel_name, const std::set< std::string > &build_opts=std::set< std::string >())
Creates an opencl kernel using a compile context.
Definition: CLHelpers.cpp:403
bool update_window_and_padding(Window &win, Ts &&... patterns)
Update window and padding size for each of the access patterns.
Definition: WindowHelpers.h:46
virtual const TensorShape & tensor_shape() const =0
Size for each dimension of the tensor.
Class to describe a number of elements in each dimension.
Definition: Steps.h:40
Coordinates of an item.
Definition: Coordinates.h:37
Implementation of a row access pattern.
std::string kernel_name
const std::string & string_from_interpolation_policy(InterpolationPolicy policy)
Translates a given interpolation policy to a string.
Definition: Utils.cpp:212
std::string get_cl_type_from_data_type(const DataType &dt)
Translates a tensor data type to the appropriate OpenCL type.
Definition: CLHelpers.cpp:37
virtual ITensorInfo * info() const =0
Interface to be implemented by the child class to return the tensor&#39;s metadata.
static constexpr unsigned int num_arguments_per_2D_tensor()
Returns the number of arguments enqueued per 2D tensor object.
Definition: ICLKernel.h:206
unsigned int left
left of the border
Definition: Types.h:378
unsigned int right
right of the border
Definition: Types.h:376
Output values are determined by averaging the source pixels whose areas fall under the area of the de...
#define ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(t, c,...)
Definition: Validate.h:790
CLCompileContext class.
Interface for OpenCL tensor.
Definition: ICLTensor.h:42
Manages all the OpenCL kernels compilation and caching, provides accessors for the OpenCL Context...
Wrapper to configure the Khronos OpenCL C++ header.
unsigned int num_elems_processed_per_iteration
Container for valid region of a window.
Definition: Types.h:188
Describe a multidimensional execution window.
Definition: Window.h:39