/*
 * Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
 *           (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
 *
 * This file is part of lsp-dsp-lib
 * Created on: 31 мар. 2020 г.
 *
 * lsp-dsp-lib is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * lsp-dsp-lib is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
 */

#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/stdlib/math.h>
#include <lsp-plug.in/test-fw/utest.h>
#include <lsp-plug.in/test-fw/helpers.h>
#include <lsp-plug.in/test-fw/FloatBuffer.h>

namespace lsp
{
    namespace generic
    {
        void limit_saturate1(float *dst, size_t count);
        void limit_saturate2(float *dst, const float *src, size_t count);
    }

    IF_ARCH_X86(
        namespace sse2
        {
            void limit_saturate1(float *dst, size_t count);
            void limit_saturate2(float *dst, const float *src, size_t count);
        }

        namespace avx2
        {
            void limit_saturate1(float *dst, size_t count);
            void limit_saturate2(float *dst, const float *src, size_t count);
        }

        namespace avx512
        {
            void limit_saturate1(float *dst, size_t count);
            void limit_saturate2(float *dst, const float *src, size_t count);
        }
    )

    IF_ARCH_ARM(
        namespace neon_d32
        {
            void limit_saturate1(float *dst, size_t count);
            void limit_saturate2(float *dst, const float *src, size_t count);
        }
    )

    IF_ARCH_AARCH64(
        namespace asimd
        {
            void limit_saturate1(float *dst, size_t count);
            void limit_saturate2(float *dst, const float *src, size_t count);
        }
    )
}

typedef void (* limit_saturate1_t)(float *dst, size_t count);
typedef void (* limit_saturate2_t)(float *dst, const float *src, size_t count);

UTEST_BEGIN("dsp.float", limit_saturate)

    void init_buf(FloatBuffer &buf)
    {
        for (size_t i=0; i<buf.size(); ++i)
        {
            switch (i%6)
            {
                case 0:
                    buf[i]          = +INFINITY;
                    break;
                case 1:
                    buf[i]          = randf(0.0f, 2.0f);
                    break;
                case 2:
                    buf[i]          = -INFINITY;
                    break;
                case 3:
                    buf[i]          = randf(-2.0f, 0.0f);
                    break;
                case 4:
                    buf[i]          = -NAN;
                    break;
                default:
                    buf[i]          = NAN;
                    break;
            }
        }
    }

    void check_buffer(const char *label, FloatBuffer & buf)
    {
        UTEST_ASSERT_MSG(buf.valid(), "Destination buffer '%s' corrupted", label);
        for (size_t i=0, n=buf.size(); i<n; ++i)
        {
            float s = buf.get(i);
            UTEST_ASSERT_MSG((s >= -1.0f) && (s <= 1.0f), "Invalid buffer contents: %.5f", s);
        }
    }

    void call(const char *label, size_t align, limit_saturate2_t func)
    {
        if (!UTEST_SUPPORTED(func))
            return;

        UTEST_FOREACH(count, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
                        32, 64, 65, 100, 768, 999, 1024, 0x1fff)
        {
            for (size_t mask=0; mask <= 0x03; ++mask)
            {
                printf("Testing %s on input buffer of %d numbers, mask=0x%x...\n", label, int(count), int(mask));

                FloatBuffer src(count, align, mask & 0x01);
                init_buf(src);
                FloatBuffer dst1(count, align, mask & 0x02);
                FloatBuffer dst2(dst1);

                // Call functions
                generic::limit_saturate2(dst1, src, count);
                func(dst2, src, count);

                UTEST_ASSERT_MSG(src.valid(), "Source buffer corrupted");

                check_buffer("dst1", dst1);
                check_buffer("dst2", dst2);

                // Compare buffers
                if (!dst1.equals_relative(dst2, 1e-5))
                {
                    src.dump("src ");
                    dst1.dump("dst1");
                    dst2.dump("dst2");
                    UTEST_FAIL_MSG("Output of functions for test '%s' differs", label);
                }
            }
        }
    }

    void call(const char *label, size_t align, limit_saturate1_t func)
    {
        if (!UTEST_SUPPORTED(func))
            return;

        UTEST_FOREACH(count, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
                32, 64, 65, 100, 768, 999, 1024, 0x1fff)
        {
            for (size_t mask=0; mask <= 0x01; ++mask)
            {
                printf("Testing %s on input buffer of %d numbers, mask=0x%x...\n", label, int(count), int(mask));

                FloatBuffer dst1(count, align, mask & 0x02);
                init_buf(dst1);
                FloatBuffer dst2(dst1);
                FloatBuffer src(dst1);

                // Call functions
                generic::limit_saturate1(dst1, count);
                func(dst2, count);

                check_buffer("dst1", dst1);
                check_buffer("dst2", dst2);

                // Compare buffers
                if (!dst1.equals_relative(dst2, 1e-5))
                {
                    src.dump("src ");
                    dst1.dump("dst1");
                    dst2.dump("dst2");
                    UTEST_FAIL_MSG("Output of functions for test '%s' differs", label);
                }
            }
        }
    }

    UTEST_MAIN
    {
        #define CALL(func, align) \
            call(#func, align, func)

        IF_ARCH_X86(CALL(sse2::limit_saturate1, 16));
        IF_ARCH_X86(CALL(sse2::limit_saturate2, 16));

        IF_ARCH_X86(CALL(avx2::limit_saturate1, 32));
        IF_ARCH_X86(CALL(avx2::limit_saturate2, 32));

        IF_ARCH_X86(CALL(avx512::limit_saturate1, 64));
        IF_ARCH_X86(CALL(avx512::limit_saturate2, 64));

        IF_ARCH_ARM(CALL(neon_d32::limit_saturate1, 16));
        IF_ARCH_ARM(CALL(neon_d32::limit_saturate2, 16));

        IF_ARCH_AARCH64(CALL(asimd::limit_saturate1, 16));
        IF_ARCH_AARCH64(CALL(asimd::limit_saturate2, 16));
    }

UTEST_END;


