PeerStreamer

/**

 * @file

 * VP6 DSP-oriented functions

 *

 * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>

 *

 * This file is part of Libav.

 *

 * Libav 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.

 *

 * Libav 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 Libav; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include "libavutil/common.h"

#include "vp56dsp.h"

void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride,

                           const int16_t *h_weights, const int16_t *v_weights)

{

    int x, y;

    int tmp[8*11];

    int *t = tmp;

    src -= stride;

    for (y=0; y<11; y++) {

        for (x=0; x<8; x++) {

            t[x] = av_clip_uint8((  src[x-1] * h_weights[0]

                               + src[x  ] * h_weights[1]

                               + src[x+1] * h_weights[2]

                               + src[x+2] * h_weights[3] + 64) >> 7);

        }

        src += stride;

        t += 8;

    }

    t = tmp + 8;

    for (y=0; y<8; y++) {

        for (x=0; x<8; x++) {

            dst[x] = av_clip_uint8((  t[x-8 ] * v_weights[0]

                                 + t[x   ] * v_weights[1]

                                 + t[x+8 ] * v_weights[2]

                                 + t[x+16] * v_weights[3] + 64) >> 7);

        }

        dst += stride;

        t += 8;

    }

}