/*

 * 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 "ttaencdsp.h"

#include "config.h"

static int32_t ttaenc_filter_process_c(int32_t *qmi, int32_t *dx, int32_t *dl,

                                       int32_t *error, int32_t in, int32_t shift,

                                       int32_t round)

{

    uint32_t *qm = qmi;

    if (*error < 0) {

        qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];

        qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];

    } else if (*error > 0) {

        qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];

        qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];

    }

    round += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +

             dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];

    dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];

    dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];

    dx[4] = ((dl[4] >> 30) | 1);

    dx[5] = ((dl[5] >> 30) | 2) & ~1;

    dx[6] = ((dl[6] >> 30) | 2) & ~1;

    dx[7] = ((dl[7] >> 30) | 4) & ~3;

    dl[4]  = -(unsigned)dl[5];     dl[5] = -(unsigned)dl[6];

    dl[6]  = in -(unsigned)dl[7];  dl[7] = in;

    dl[5] += (unsigned)dl[6];      dl[4] += (unsigned)dl[5];

    in -= (round >> shift);

    *error = in;

    return in;

}

av_cold void ff_ttaencdsp_init(TTAEncDSPContext *c)

{

    c->filter_process = ttaenc_filter_process_c;

#if ARCH_X86 && HAVE_X86ASM

    ff_ttaencdsp_init_x86(c);

#endif

}