/*

 * 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 "config.h"

#include "libavutil/attributes.h"

#include "vorbisdsp.h"

static void vorbis_inverse_coupling_c(float *mag, float *ang, ptrdiff_t blocksize)

{

    for (ptrdiff_t i = 0;  i < blocksize;  i++) {

        float angi = ang[i], magi = mag[i];

        if (magi > 0.f) {

            if (angi > 0.f) {

                ang[i] = magi - angi;

            } else {

                ang[i] = magi;

                mag[i] = magi + angi;

            }

        } else {

            if (angi > 0.f) {

                ang[i] = magi + angi;

            } else {

                ang[i] = magi;

                mag[i] = magi - angi;

            }

        }

    }

}

av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)

{

    dsp->vorbis_inverse_coupling = vorbis_inverse_coupling_c;

#if ARCH_AARCH64

    ff_vorbisdsp_init_aarch64(dsp);

#elif ARCH_ARM

    ff_vorbisdsp_init_arm(dsp);

#elif ARCH_PPC

    ff_vorbisdsp_init_ppc(dsp);

#elif ARCH_RISCV

    ff_vorbisdsp_init_riscv(dsp);

#elif ARCH_X86

    ff_vorbisdsp_init_x86(dsp);

#endif

}