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24 #ifndef ARM_COMPUTE_CL /* Needed by Utils.cpp to handle OpenCL exceptions properly */
25 #error "This example needs to be built with -DARM_COMPUTE_CL"
26 #endif /* ARM_COMPUTE_CL */
28 #include "arm_compute/core/Types.h"
29 #include "arm_compute/runtime/CL/CLFunctions.h"
30 #include "arm_compute/runtime/CL/CLScheduler.h"
31 #include "utils/Utils.h"
33 using namespace arm_compute;
34 using namespace utils;
36 class CLEventsExample : public Example
39 void do_setup(int argc, char **argv) override
41 /** [OpenCL events] **/
43 constexpr int scale_factor = 2;
45 CLScheduler::get().default_init();
50 std::cout << "Usage: ./build/cl_events [input_image.ppm]\n\n";
51 std::cout << "No input_image provided, creating a dummy 640x480 image\n";
52 // Create an empty grayscale 640x480 image
53 src.allocator()->init(TensorInfo(640, 480, Format::U8));
58 ppm.init_image(src, Format::U8);
61 TensorInfo dst_info(src.info()->dimension(0) / scale_factor, src.info()->dimension(1) / scale_factor, Format::U8);
63 // Configure the temporary and destination images
64 dst.allocator()->init(dst_info);
65 tmp_scale_median.allocator()->init(dst_info);
66 tmp_median_gauss.allocator()->init(dst_info);
68 //Configure the functions:
69 scale.configure(&src, &tmp_scale_median, InterpolationPolicy::NEAREST_NEIGHBOR, BorderMode::REPLICATE);
70 median.configure(&tmp_scale_median, &tmp_median_gauss, BorderMode::REPLICATE);
71 gauss.configure(&tmp_median_gauss, &dst, BorderMode::REPLICATE);
73 // Allocate all the images
74 src.allocator()->allocate();
75 dst.allocator()->allocate();
76 tmp_scale_median.allocator()->allocate();
77 tmp_median_gauss.allocator()->allocate();
79 // Fill the input image with the content of the PPM image if a filename was provided:
83 output_filename = std::string(argv[1]) + "_out.ppm";
85 /** [OpenCL events] **/
87 void do_run() override
89 // Enqueue and flush the scale OpenCL kernel:
91 // Create a synchronisation event between scale and median:
92 cl::Event scale_event = CLScheduler::get().enqueue_sync_event();
93 // Enqueue and flush the median OpenCL kernel:
95 // Enqueue and flush the Gaussian OpenCL kernel:
98 //Make sure all the OpenCL jobs are done executing:
99 scale_event.wait(); // Block until Scale is done executing (Median3x3 and Gaussian5x5 might still be running)
100 CLScheduler::get().sync(); // Block until Gaussian5x5 is done executing
102 void do_teardown() override
104 // Save the result to file:
105 if(!output_filename.empty())
107 save_to_ppm(dst, output_filename); // save_to_ppm maps and unmaps the image to store as PPM
112 CLImage src{}, tmp_scale_median{}, tmp_median_gauss{}, dst{};
114 CLMedian3x3 median{};
115 CLGaussian5x5 gauss{};
116 std::string output_filename{};
119 /** Main program for convolution test
121 * @param[in] argc Number of arguments
122 * @param[in] argv Arguments ( [optional] Path to PPM image to process )
124 int main(int argc, char **argv)
126 return utils::run_example<CLEventsExample>(argc, argv);