arm_compute v17.12
diff --git a/tests/validation/reference/Scale.cpp b/tests/validation/reference/Scale.cpp
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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 "arm_compute/core/Helpers.h"
+
+#include "Scale.h"
+#include "Utils.h"
+#include "support/ToolchainSupport.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<T> scale(const SimpleTensor<T> &in, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, T constant_border_value,
+ SamplingPolicy sampling_policy, bool ceil_policy_scale)
+{
+ // Add 1 if ceil_policy_scale is true
+ const size_t round_value = ceil_policy_scale ? 1U : 0U;
+ TensorShape shape_scaled(in.shape());
+ shape_scaled.set(0, (in.shape()[0] + round_value) * scale_x);
+ shape_scaled.set(1, (in.shape()[1] + round_value) * scale_y);
+ SimpleTensor<T> out(shape_scaled, in.data_type());
+
+ // Compute the ratio between source width/height and destination width/height
+ const auto wr = static_cast<float>(in.shape()[0]) / static_cast<float>(out.shape()[0]);
+ const auto hr = static_cast<float>(in.shape()[1]) / static_cast<float>(out.shape()[1]);
+
+ const auto width = static_cast<int>(in.shape().x());
+ const auto height = static_cast<int>(in.shape().y());
+
+ // Determine border size
+ const int border_size = (border_mode == BorderMode::UNDEFINED) ? 0 : 1;
+
+ // Area interpolation behaves as Nearest Neighbour in case of up-sampling
+ if(policy == InterpolationPolicy::AREA && wr <= 1.f && hr <= 1.f)
+ {
+ policy = InterpolationPolicy::NEAREST_NEIGHBOR;
+ }
+
+ for(int element_idx = 0, count = 0; element_idx < out.num_elements(); ++element_idx, ++count)
+ {
+ Coordinates id = index2coord(out.shape(), element_idx);
+ int idx = id.x();
+ int idy = id.y();
+ float x_src = 0;
+ float y_src = 0;
+
+ switch(sampling_policy)
+ {
+ case SamplingPolicy::TOP_LEFT:
+ x_src = idx * wr;
+ y_src = idy * hr;
+ break;
+ case SamplingPolicy::CENTER:
+ x_src = (idx + 0.5f) * wr - 0.5f;
+ y_src = (idy + 0.5f) * hr - 0.5f;
+ break;
+ default:
+ ARM_COMPUTE_ERROR("Unsupported sampling policy.");
+ break;
+ }
+
+ switch(policy)
+ {
+ case InterpolationPolicy::NEAREST_NEIGHBOR:
+ {
+ //Calculate the source coords without -0.5f is equivalent to round the x_scr/y_src coords
+ x_src = (idx + 0.5f) * wr;
+ y_src = (idy + 0.5f) * hr;
+ id.set(0, x_src);
+ id.set(1, y_src);
+
+ // If coordinates in range of tensor's width or height
+ if(is_valid_pixel_index(x_src, y_src, width, height, border_size))
+ {
+ out[element_idx] = tensor_elem_at(in, id, border_mode, constant_border_value);
+ }
+ break;
+ }
+ case InterpolationPolicy::BILINEAR:
+ {
+ id.set(0, std::floor(x_src));
+ id.set(1, std::floor(y_src));
+ if(is_valid_pixel_index(x_src, y_src, width, height, border_size))
+ {
+ out[element_idx] = bilinear_policy(in, id, x_src, y_src, border_mode, constant_border_value);
+ }
+ else
+ {
+ if(border_mode == BorderMode::CONSTANT)
+ {
+ out[element_idx] = constant_border_value;
+ }
+ else if(border_mode == BorderMode::REPLICATE)
+ {
+ id.set(0, clamp(static_cast<int>(x_src), 0, width - 1));
+ id.set(1, clamp(static_cast<int>(y_src), 0, height - 1));
+ out[element_idx] = in[coord2index(in.shape(), id)];
+ }
+ }
+ break;
+ }
+ case InterpolationPolicy::AREA:
+ {
+ int x_from = std::floor(idx * wr - 0.5f - x_src);
+ int y_from = std::floor(idy * hr - 0.5f - y_src);
+ int x_to = std::ceil((idx + 1) * wr - 0.5f - x_src);
+ int y_to = std::ceil((idy + 1) * hr - 0.5f - y_src);
+ const int xi = std::floor(x_src);
+ const int yi = std::floor(y_src);
+
+ // Clamp position to borders
+ x_src = std::max(-static_cast<float>(border_size), std::min(x_src, static_cast<float>(width - 1 + border_size)));
+ y_src = std::max(-static_cast<float>(border_size), std::min(y_src, static_cast<float>(height - 1 + border_size)));
+
+ // Clamp bounding box offsets to borders
+ x_from = ((x_src + x_from) < -border_size) ? -border_size : x_from;
+ y_from = ((y_src + y_from) < -border_size) ? -border_size : y_from;
+ x_to = ((x_src + x_to) >= (width + border_size)) ? (width - 1 + border_size) : x_to;
+ y_to = ((y_src + y_to) >= (height + border_size)) ? (height - 1 + border_size) : y_to;
+ ARM_COMPUTE_ERROR_ON((x_to - x_from + 1) == 0 || (y_to - y_from + 1) == 0);
+
+ float sum = 0;
+ for(int j = yi + y_from, je = yi + y_to; j <= je; ++j)
+ {
+ for(int i = xi + x_from, ie = xi + x_to; i <= ie; ++i)
+ {
+ id.set(0, static_cast<int>(i));
+ id.set(1, static_cast<int>(j));
+ sum += tensor_elem_at(in, id, border_mode, constant_border_value);
+ }
+ }
+ out[element_idx] = sum / ((x_to - x_from + 1) * (y_to - y_from + 1));
+
+ break;
+ }
+ default:
+ ARM_COMPUTE_ERROR("Unsupported interpolation mode");
+ }
+ }
+
+ return out;
+}
+
+template SimpleTensor<uint8_t> scale(const SimpleTensor<uint8_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, uint8_t constant_border_value,
+ SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<int16_t> scale(const SimpleTensor<int16_t> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, int16_t constant_border_value,
+ SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<half> scale(const SimpleTensor<half> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, half constant_border_value,
+ SamplingPolicy sampling_policy, bool ceil_policy_scale);
+template SimpleTensor<float> scale(const SimpleTensor<float> &src, float scale_x, float scale_y, InterpolationPolicy policy, BorderMode border_mode, float constant_border_value,
+ SamplingPolicy sampling_policy, bool ceil_policy_scale);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute