dirac_dwt.c

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/*
 * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
 * Copyright (C) 2008 David Conrad
 *
 * 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/common.h"
#include "dirac_dwt.h"
 
#define TEMPLATE_8bit
#include "dirac_dwt_template.c"
 
#define TEMPLATE_10bit
#include "dirac_dwt_template.c"
 
#define TEMPLATE_12bit
#include "dirac_dwt_template.c"
 
int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
                         int decomposition_count, int bit_depth)
{
    int ret = 0;
 
    d->buffer = p->buf;
    d->width  = p->width;
    d->height = p->height;
    d->stride = p->stride;
    d->temp   = p->tmp;
    d->decomposition_count = decomposition_count;
 
    if (bit_depth == 8)
        ret = ff_spatial_idwt_init_8bit(d, type);
    else if (bit_depth == 10)
        ret = ff_spatial_idwt_init_10bit(d, type);
    else if (bit_depth == 12)
        ret = ff_spatial_idwt_init_12bit(d, type);
    else
        av_log(NULL, AV_LOG_WARNING, "Unsupported bit depth = %i\n", bit_depth);
 
    if (ret) {
        av_log(NULL, AV_LOG_ERROR, "Unknown wavelet type %d\n", type);
        return AVERROR_INVALIDDATA;
    }
 
    if (ARCH_X86 && bit_depth == 8)
        ff_spatial_idwt_init_x86(d, type);
    return 0;
}
 
void ff_spatial_idwt_slice2(DWTContext *d, int y)
{
    int level, support = d->support;
 
    for (level = d->decomposition_count-1; level >= 0; level--) {
        int wl = d->width  >> level;
        int hl = d->height >> level;
        int stride_l = d->stride << level;
 
        while (d->cs[level].y <= FFMIN((y>>level)+support, hl))
            d->spatial_compose(d, level, wl, hl, stride_l);
    }
}