mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-29 06:45:47 +00:00
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
|
|
* JPEG 2000 DSP functions
|
|
* Copyright (c) 2007 Kamil Nowosad
|
|
* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.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 "config.h"
|
|
#include "libavutil/attributes.h"
|
|
#include "jpeg2000dsp.h"
|
|
|
|
/* Inverse ICT parameters in float and integer.
|
|
* int value = (float value) * (1<<16) */
|
|
const float ff_jpeg2000_f_ict_params[4] = {
|
|
1.402f,
|
|
0.34413f,
|
|
0.71414f,
|
|
1.772f
|
|
};
|
|
|
|
static const int i_ict_params[4] = {
|
|
91881,
|
|
22553,
|
|
46802,
|
|
116130
|
|
};
|
|
|
|
static void ict_float(void *_src0, void *_src1, void *_src2, int csize)
|
|
{
|
|
const float *const f_ict_params = ff_jpeg2000_f_ict_params;
|
|
float *src0 = _src0, *src1 = _src1, *src2 = _src2;
|
|
float i0f, i1f, i2f;
|
|
int i;
|
|
|
|
for (i = 0; i < csize; i++) {
|
|
i0f = *src0 + (f_ict_params[0] * *src2);
|
|
i1f = *src0 - (f_ict_params[1] * *src1)
|
|
- (f_ict_params[2] * *src2);
|
|
i2f = *src0 + (f_ict_params[3] * *src1);
|
|
*src0++ = i0f;
|
|
*src1++ = i1f;
|
|
*src2++ = i2f;
|
|
}
|
|
}
|
|
|
|
static void ict_int(void *_src0, void *_src1, void *_src2, int csize)
|
|
{
|
|
int32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
|
|
int32_t i0, i1, i2;
|
|
int i;
|
|
|
|
for (i = 0; i < csize; i++) {
|
|
i0 = *src0 + *src2 + ((int)((26345U * *src2) + (1 << 15)) >> 16);
|
|
i1 = *src0 - ((int)(((unsigned)i_ict_params[1] * *src1) + (1 << 15)) >> 16)
|
|
- ((int)(((unsigned)i_ict_params[2] * *src2) + (1 << 15)) >> 16);
|
|
i2 = *src0 + (2 * *src1) + ((int)((-14942U * *src1) + (1 << 15)) >> 16);
|
|
*src0++ = i0;
|
|
*src1++ = i1;
|
|
*src2++ = i2;
|
|
}
|
|
}
|
|
|
|
static void rct_int(void *_src0, void *_src1, void *_src2, int csize)
|
|
{
|
|
uint32_t *src0 = _src0, *src1 = _src1, *src2 = _src2;
|
|
int i;
|
|
|
|
for (i = 0; i < csize; i++) {
|
|
uint32_t i1 = *src0 - ((int32_t)(*src2 + *src1) >> 2);
|
|
int32_t i0 = i1 + *src2;
|
|
int32_t i2 = i1 + *src1;
|
|
*src0++ = i0;
|
|
*src1++ = i1;
|
|
*src2++ = i2;
|
|
}
|
|
}
|
|
|
|
av_cold void ff_jpeg2000dsp_init(Jpeg2000DSPContext *c)
|
|
{
|
|
c->mct_decode[FF_DWT97] = ict_float;
|
|
c->mct_decode[FF_DWT53] = rct_int;
|
|
c->mct_decode[FF_DWT97_INT] = ict_int;
|
|
|
|
#if ARCH_RISCV
|
|
ff_jpeg2000dsp_init_riscv(c);
|
|
#elif ARCH_X86
|
|
ff_jpeg2000dsp_init_x86(c);
|
|
#endif
|
|
}
|