/*
 * Copyright (c) 2016 Muhammad Faiz <mfcc64@gmail.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/cpu.h"
#include "libavfilter/avf_showcqt.h"

#define DECLARE_CQT_CALC(type) \
void ff_showcqt_cqt_calc_##type(AVComplexFloat *dst, const AVComplexFloat *src, \
                                const Coeffs *coeffs, int len, int fft_len)

DECLARE_CQT_CALC(sse);
DECLARE_CQT_CALC(sse3);
DECLARE_CQT_CALC(avx);
DECLARE_CQT_CALC(fma3);
DECLARE_CQT_CALC(fma4);

#define permute_coeffs_0 NULL

static void permute_coeffs_01452367(float *v, int len)
{
    int k;
    for (k = 0; k < len; k += 8) {
        FFSWAP(float, v[k+2], v[k+4]);
        FFSWAP(float, v[k+3], v[k+5]);
    }
}

av_cold void ff_showcqt_init_x86(ShowCQTContext *s)
{
    int cpuflags = av_get_cpu_flags();

#define SELECT_CQT_CALC(type, TYPE, align, perm) \
if (EXTERNAL_##TYPE(cpuflags)) { \
    s->cqt_calc = ff_showcqt_cqt_calc_##type; \
    s->cqt_align = align; \
    s->permute_coeffs = permute_coeffs_##perm; \
}

    SELECT_CQT_CALC(sse,  SSE,  4, 0);
    SELECT_CQT_CALC(sse3, SSE3_FAST, 4, 0);
    SELECT_CQT_CALC(fma4, FMA4, 4, 0); // using xmm
    SELECT_CQT_CALC(avx,  AVX_FAST,  8, 01452367);
    SELECT_CQT_CALC(fma3, FMA3_FAST, 8, 01452367);
}