COMPMID-344 Updated doxygen

Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae

1 files changed, 113 insertions, 0 deletions

diff --git a/src/core/CL/cl_kernels/gaussian_pyramid.cl b/src/core/CL/cl_kernels/gaussian_pyramid.cl
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+/*
+ * Copyright (c) 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 "helpers.h"
+
+/** Computes the Gaussian Filter 1x5 + sub-sampling along the X direction
+ *
+ * @note Each thread computes 8 pixels
+ *
+ * @param[in]  src_ptr                           Pointer to the source image. Supported data types: U8
+ * @param[in]  src_stride_x                      Stride of the source image in X dimension (in bytes)
+ * @param[in]  src_step_x                        src_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  src_stride_y                      Stride of the source image in Y dimension (in bytes)
+ * @param[in]  src_step_y                        src_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  src_offset_first_element_in_bytes The offset of the first element in the source image
+ * @param[out] dst_ptr                           Pointer to the destination image. Supported data types: U16
+ * @param[in]  dst_stride_x                      Stride of the destination image in X dimension (in bytes)
+ * @param[in]  dst_step_x                        dst_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  dst_stride_y                      Stride of the destination image in Y dimension (in bytes)
+ * @param[in]  dst_step_y                        dst_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  dst_offset_first_element_in_bytes The offset of the first element in the destination image
+ */
+__kernel void gaussian1x5_sub_x(
+    IMAGE_DECLARATION(src),
+    IMAGE_DECLARATION(dst))
+{
+    Image src = CONVERT_TO_IMAGE_STRUCT(src);
+    Image dst = CONVERT_TO_IMAGE_STRUCT(dst);
+
+    // Load values for the convolution (20 bytes needed)
+    uchar16 temp0 = vload16(0, src.ptr);
+    uchar4  temp1 = vload4(0, src.ptr + 16);
+
+    // Convert to USHORT8
+    ushort8 l2_data = convert_ushort8((uchar8)(temp0.s02468ACE));
+    ushort8 l1_data = convert_ushort8((uchar8)(temp0.s13579BDF));
+    ushort8 m_data  = convert_ushort8((uchar8)(temp0.s2468, temp0.sACE, temp1.s0));
+    ushort8 r1_data = convert_ushort8((uchar8)(temp0.s3579, temp0.sBDF, temp1.s1));
+    ushort8 r2_data = convert_ushort8((uchar8)(temp0.s468A, temp0.sCE, temp1.s02));
+
+    // Compute convolution along the X direction
+    ushort8 pixels = l2_data + r2_data;
+    pixels += l1_data * (ushort8)4;
+    pixels += m_data * (ushort8)6;
+    pixels += r1_data * (ushort8)4;
+
+    // Store result
+    vstore8(pixels, 0, (__global ushort *)dst.ptr);
+}
+
+/** Computes the Gaussian Filter 5x1 + sub-sampling along the Y direction
+ *
+ * @note Each thread computes 8 pixels
+ *
+ * @param[in]  src_ptr                           Pointer to the source image. Supported data types: U16
+ * @param[in]  src_stride_x                      Stride of the source image in X dimension (in bytes)
+ * @param[in]  src_step_x                        src_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  src_stride_y                      Stride of the source image in Y dimension (in bytes)
+ * @param[in]  src_step_y                        src_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  src_offset_first_element_in_bytes The offset of the first element in the source image
+ * @param[out] dst_ptr                           Pointer to the destination image. Supported data types: U8
+ * @param[in]  dst_stride_x                      Stride of the destination image in X dimension (in bytes)
+ * @param[in]  dst_step_x                        dst_stride_x * number of elements along X processed per workitem(in bytes)
+ * @param[in]  dst_stride_y                      Stride of the destination image in Y dimension (in bytes)
+ * @param[in]  dst_step_y                        dst_stride_y * number of elements along Y processed per workitem(in bytes)
+ * @param[in]  dst_offset_first_element_in_bytes The offset of the first element in the destination image
+ */
+__kernel void gaussian5x1_sub_y(
+    IMAGE_DECLARATION(src),
+    IMAGE_DECLARATION(dst))
+{
+    Image src = CONVERT_TO_IMAGE_STRUCT(src);
+    Image dst = CONVERT_TO_IMAGE_STRUCT(dst);
+
+    // Load values
+    ushort8 u2_data = vload8(0, (__global ushort *)offset(&src, 0, 0));
+    ushort8 u1_data = vload8(0, (__global ushort *)offset(&src, 0, 1));
+    ushort8 m_data  = vload8(0, (__global ushort *)offset(&src, 0, 2));
+    ushort8 d1_data = vload8(0, (__global ushort *)offset(&src, 0, 3));
+    ushort8 d2_data = vload8(0, (__global ushort *)offset(&src, 0, 4));
+
+    // Compute convolution along the Y direction
+    ushort8 pixels = u2_data + d2_data;
+    pixels += u1_data * (ushort8)4;
+    pixels += m_data * (ushort8)6;
+    pixels += d1_data * (ushort8)4;
+
+    // Scale result
+    pixels >>= (ushort8)8;
+
+    // Store result
+    vstore8(convert_uchar8_sat(pixels), 0, dst.ptr);
+}