COMPMID-344 Updated doxygen
Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae
diff --git a/src/core/CL/kernels/CLChannelExtractKernel.cpp b/src/core/CL/kernels/CLChannelExtractKernel.cpp
new file mode 100644
index 0000000..5411533
--- /dev/null
+++ b/src/core/CL/kernels/CLChannelExtractKernel.cpp
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2016, 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/core/CL/kernels/CLChannelExtractKernel.h"
+
+#include "arm_compute/core/CL/CLKernelLibrary.h"
+#include "arm_compute/core/CL/ICLMultiImage.h"
+#include "arm_compute/core/CL/ICLTensor.h"
+#include "arm_compute/core/CL/OpenCL.h"
+#include "arm_compute/core/Coordinates.h"
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/MultiImageInfo.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/Types.h"
+#include "arm_compute/core/Utils.h"
+#include "arm_compute/core/Validate.h"
+#include "arm_compute/core/Window.h"
+
+#include <set>
+#include <string>
+
+using namespace arm_compute;
+
+CLChannelExtractKernel::CLChannelExtractKernel()
+ : _input(nullptr), _output(nullptr), _num_elems_processed_per_iteration(8), _subsampling(1)
+{
+}
+
+void CLChannelExtractKernel::configure(const ICLTensor *input, Channel channel, ICLTensor *output)
+{
+ ARM_COMPUTE_ERROR_ON_FORMAT_NOT_IN(input, Format::RGB888, Format::RGBA8888, Format::YUYV422, Format::UYVY422);
+ ARM_COMPUTE_ERROR_ON_FORMAT_NOT_IN(output, Format::U8);
+ ARM_COMPUTE_ERROR_ON(static_cast<const void *>(input) == static_cast<void *>(output));
+
+ _input = input;
+ _output = output;
+
+ // Check format
+ const Format format = input->info()->format();
+ ARM_COMPUTE_ERROR_ON_CHANNEL_NOT_IN_KNOWN_FORMAT(format, channel);
+
+ // Create kernel
+ std::string kernel_name = "channel_extract_" + string_from_format(format);
+ std::set<std::string> build_opts = { ("-DCHANNEL_" + string_from_channel(channel)) };
+ _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel(kernel_name, build_opts));
+
+ // Half the processed elements for U,V channels due to sub-sampling of 2
+ _subsampling = ((Format::YUYV422 == format || Format::UYVY422 == format) && Channel::Y != channel) ? 2 : 1;
+
+ // Configure window
+ Window win = calculate_max_window(*input->info(), Steps(_num_elems_processed_per_iteration));
+ AccessWindowHorizontal input_access(input->info(), 0, _num_elems_processed_per_iteration);
+ AccessWindowRectangle output_access(input->info(), 0, 0, _num_elems_processed_per_iteration, 1, 1.f / _subsampling, 1.f / _subsampling);
+
+ update_window_and_padding(win, input_access, output_access);
+
+ ValidRegion input_valid_region = input->info()->valid_region();
+ output_access.set_valid_region(win, ValidRegion(std::move(input_valid_region.anchor), output->info()->tensor_shape()));
+
+ ICLKernel::configure(win);
+}
+
+void CLChannelExtractKernel::configure(const ICLMultiImage *input, Channel channel, ICLImage *output)
+{
+ ARM_COMPUTE_ERROR_ON_TENSOR_NOT_2D(output);
+ ARM_COMPUTE_ERROR_ON_FORMAT_NOT_IN(input, Format::NV12, Format::NV21, Format::IYUV, Format::YUV444);
+ ARM_COMPUTE_ERROR_ON_FORMAT_NOT_IN(output, Format::U8);
+ ARM_COMPUTE_ERROR_ON(static_cast<const void *>(input) == static_cast<void *>(output));
+
+ // Get format
+ const Format fmt = input->info()->format();
+
+ // Get input plane
+ const ICLImage *input_plane = input->cl_plane(plane_idx_from_channel(fmt, channel));
+ ARM_COMPUTE_ERROR_ON(nullptr == input_plane);
+
+ _output = output;
+ _input = input_plane;
+ _subsampling = 1;
+
+ // Create kernel
+ std::string kernel_name;
+ std::set<std::string> build_opts;
+ if(Channel::Y == channel || Format::IYUV == fmt || Format::YUV444 == fmt)
+ {
+ kernel_name = "copy_plane";
+ }
+ else
+ {
+ kernel_name = "channel_extract_" + string_from_format(fmt);
+ build_opts.insert(("-DCHANNEL_" + string_from_channel(channel)));
+ }
+ _kernel = static_cast<cl::Kernel>(CLKernelLibrary::get().create_kernel(kernel_name, build_opts));
+
+ // Configure window
+ Window win = calculate_max_window(*input_plane->info(), Steps(_num_elems_processed_per_iteration));
+ AccessWindowHorizontal output_access(input_plane->info(), 0, _num_elems_processed_per_iteration);
+
+ update_window_and_padding(win,
+ AccessWindowHorizontal(input_plane->info(), 0, _num_elems_processed_per_iteration),
+ output_access);
+
+ output_access.set_valid_region(win, input_plane->info()->valid_region());
+
+ ICLKernel::configure(win);
+}
+
+void CLChannelExtractKernel::run(const Window &window, cl::CommandQueue &queue)
+{
+ ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+ ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICLKernel::window(), window);
+
+ Window slice = window.first_slice_window_2D();
+
+ do
+ {
+ Window win_sub(slice);
+ win_sub.set(Window::DimX, Window::Dimension(win_sub.x().start() / _subsampling, win_sub.x().end() / _subsampling, win_sub.x().step() / _subsampling));
+ win_sub.set(Window::DimY, Window::Dimension(win_sub.y().start() / _subsampling, win_sub.y().end() / _subsampling, 1));
+
+ unsigned int idx = 0;
+ add_2D_tensor_argument(idx, _input, slice);
+ add_2D_tensor_argument(idx, _output, win_sub);
+ enqueue(queue, *this, slice);
+ }
+ while(window.slide_window_slice_2D(slice));
+}