GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/jpeg2000dsp.c Lines: 38 38 100.0 %
Date: 2019-11-18 18:00:01 Branches: 6 6 100.0 %

Line Branch Exec Source
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/*
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 * JPEG 2000 DSP functions
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 * Copyright (c) 2007 Kamil Nowosad
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 * Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "jpeg2000dsp.h"
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/* Inverse ICT parameters in float and integer.
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 * int value = (float value) * (1<<16) */
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static const float f_ict_params[4] = {
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    1.402f,
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    0.34413f,
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    0.71414f,
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    1.772f
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};
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static const int i_ict_params[4] = {
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     91881,
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     22553,
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     46802,
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    116130
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};
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static void ict_float(void *_src0, void *_src1, void *_src2, int csize)
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{
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    float *src0 = _src0, *src1 = _src1, *src2 = _src2;
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    float i0f, i1f, i2f;
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    int i;
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    for (i = 0; i < csize; i++) {
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        i0f = *src0 + (f_ict_params[0] * *src2);
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1536
        i1f = *src0 - (f_ict_params[1] * *src1)
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                    - (f_ict_params[2] * *src2);
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        i2f = *src0 + (f_ict_params[3] * *src1);
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        *src0++ = i0f;
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        *src1++ = i1f;
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        *src2++ = i2f;
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    }
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3
}
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static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
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{
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    int32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
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    int32_t i0, i1, i2;
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    int i;
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    for (i = 0; i < csize; i++) {
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        i0 = *src0 + *src2 + ((int)((26345U * *src2) + (1 << 15)) >> 16);
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6220800
        i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
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6220800
                   - ((int)(((unsigned)i_ict_params[2] * *src2) + (1 << 15)) >> 16);
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6220800
        i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
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        *src0++ = i0;
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        *src1++ = i1;
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        *src2++ = i2;
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    }
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}
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static void rct_int(void *_src0, void *_src1, void *_src2, int csize)
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{
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    int32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
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    int32_t i0, i1, i2;
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    int i;
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    for (i = 0; i < csize; i++) {
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        i1 = *src0 - (*src2 + *src1 >> 2);
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        i0 = i1 + *src2;
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        i2 = i1 + *src1;
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        *src0++ = i0;
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        *src1++ = i1;
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        *src2++ = i2;
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    }
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}
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av_cold void ff_jpeg2000dsp_init(Jpeg2000DSPContext *c)
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{
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    c->mct_decode[FF_DWT97]     = ict_float;
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    c->mct_decode[FF_DWT53]     = rct_int;
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    c->mct_decode[FF_DWT97_INT] = ict_int;
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    if (ARCH_X86)
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        ff_jpeg2000dsp_init_x86(c);
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}