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/*
* Copyright (c) 2021, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include <memory>
#include <new>
#include <tuple>
#include "aom/aom_integer.h"
#include "aom_ports/aom_timer.h"
#include "av1/encoder/ml.h"
#include "config/aom_config.h"
#include "config/aom_dsp_rtcd.h"
#include "config/av1_rtcd.h"
#include "test/acm_random.h"
#include "test/register_state_check.h"
#include "test/util.h"
#include "third_party/googletest/src/googletest/include/gtest/gtest.h"
namespace {
using FastSoftmaxFn = void (*)(const float *const input, float *output);
using FastSoftmaxTestParams = std::tuple<const FastSoftmaxFn, int>;
// Error thresholds for functional equivalence
constexpr float kRelEpsilon = 5e-2f;
constexpr float kAbsEpsilon = 5e-3f;
class FastSoftmaxTest : public ::testing::TestWithParam<FastSoftmaxTestParams> {
public:
FastSoftmaxTest() : target_fn_(GET_PARAM(0)), num_classes_(GET_PARAM(1)) {}
void SetUp() override {
ref_buf_.reset(new (std::nothrow) float[num_classes_]());
ASSERT_NE(ref_buf_, nullptr);
dst_buf_.reset(new (std::nothrow) float[num_classes_]());
ASSERT_NE(dst_buf_, nullptr);
input_.reset(new (std::nothrow) float[num_classes_]());
ASSERT_NE(input_, nullptr);
}
void RunSoftmaxTest();
void RunSoftmaxSpeedTest(const int run_times);
void FillInputBuf();
private:
const FastSoftmaxFn target_fn_;
const int num_classes_;
std::unique_ptr<float[]> ref_buf_, dst_buf_, input_;
libaom_test::ACMRandom rng_;
};
void FastSoftmaxTest::FillInputBuf() {
for (int idx = 0; idx < num_classes_; idx++) {
input_[idx] = ((float)rng_.Rand31() - (1 << 30)) / (1u << 30);
}
}
void FastSoftmaxTest::RunSoftmaxTest() {
av1_nn_softmax(input_.get(), ref_buf_.get(), num_classes_);
target_fn_(input_.get(), dst_buf_.get());
for (int idx = 0; idx < num_classes_; idx++) {
if (ref_buf_[idx] < kAbsEpsilon) {
ASSERT_LE(dst_buf_[idx], kAbsEpsilon)
<< "Reference output was near-zero, test output was not" << std::endl;
} else {
const float error = dst_buf_[idx] - ref_buf_[idx];
const float relative_error = fabsf(error / ref_buf_[idx]);
ASSERT_LE(relative_error, kRelEpsilon)
<< "Excessive relative error between reference and test output"
<< std::endl;
ASSERT_LE(error, kAbsEpsilon)
<< "Excessive absolute error between reference and test output"
<< std::endl;
}
}
}
void FastSoftmaxTest::RunSoftmaxSpeedTest(const int run_times) {
aom_usec_timer timer;
aom_usec_timer_start(&timer);
for (int idx = 0; idx < run_times; idx++) {
target_fn_(input_.get(), dst_buf_.get());
}
aom_usec_timer_mark(&timer);
const int64_t time = aom_usec_timer_elapsed(&timer);
std::cout << "Test with " << num_classes_ << " classes took " << time
<< " us." << std::endl;
}
TEST_P(FastSoftmaxTest, RandomValues) {
FillInputBuf();
RunSoftmaxTest();
}
TEST_P(FastSoftmaxTest, DISABLED_Speed) {
constexpr int kNumTimes = 1000000;
RunSoftmaxSpeedTest(kNumTimes);
}
void AnchorSoftmax16Fn(const float *input, float *output) {
av1_nn_softmax(input, output, 16);
}
const FastSoftmaxTestParams kArrayParams_c[] = {
FastSoftmaxTestParams(AnchorSoftmax16Fn, 16),
FastSoftmaxTestParams(av1_nn_fast_softmax_16_c, 16)
};
INSTANTIATE_TEST_SUITE_P(C, FastSoftmaxTest,
::testing::ValuesIn(kArrayParams_c));
#if HAVE_SSE3 && !CONFIG_EXCLUDE_SIMD_MISMATCH
INSTANTIATE_TEST_SUITE_P(
SSE3, FastSoftmaxTest,
::testing::Values(FastSoftmaxTestParams(av1_nn_fast_softmax_16_sse3, 16)));
#endif
} // namespace
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