/*

 * VP5/6/8 decoder

 * Copyright (c) 2010 Fiona Glaser <fiona@x264.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 <stdint.h>

#include "libavutil/error.h"

#include "bytestream.h"

#include "vpx_rac.h"

const uint8_t ff_vpx_norm_shift[256]= {

 8,7,6,6,5,5,5,5,4,4,4,4,4,4,4,4,

 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,

 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,

 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,

 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

};

int ff_vpx_init_range_decoder(VPXRangeCoder *c, const uint8_t *buf, int buf_size)

{

    c->high = 255;

    c->bits = -16;

    c->buffer = buf;

    c->end = buf + buf_size;

    c->end_reached = 0;

    if (buf_size < 1)

        return AVERROR_INVALIDDATA;

    c->code_word = bytestream_get_be24(&c->buffer);

    return 0;

}