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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-dsp-lib
* Created on: 31 мар. 2020 г.
*
* lsp-dsp-lib 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 3 of the License, or
* any later version.
*
* lsp-dsp-lib 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 lsp-dsp-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef PRIVATE_DSP_ARCH_GENERIC_SEARCH_H_
#define PRIVATE_DSP_ARCH_GENERIC_SEARCH_H_
#ifndef PRIVATE_DSP_ARCH_GENERIC_IMPL
#error "This header should not be included directly"
#endif /* PRIVATE_DSP_ARCH_GENERIC_IMPL */
namespace lsp
{
namespace generic
{
float min(const float *src, size_t count)
{
if (count == 0)
return 0.0f;
float min = src[0];
for (size_t i=1; i<count; ++i)
{
float tmp = src[i];
if (tmp < min)
min = tmp;
}
return min;
}
float max(const float *src, size_t count)
{
if (count == 0)
return 0.0f;
float max = src[0];
for (size_t i=1; i<count; ++i)
{
float tmp = src[i];
if (tmp > max)
max = tmp;
}
return max;
}
float abs_min(const float *src, size_t count)
{
if (count == 0)
return 0.0f;
float min = fabs(src[0]);
for (size_t i=1; i<count; ++i)
{
float tmp = fabs(src[i]);
if (tmp < min)
min = tmp;
}
return min;
}
float abs_max(const float *src, size_t count)
{
if (count == 0)
return 0.0f;
float max = fabs(src[0]);
for (size_t i=1; i<count; ++i)
{
float tmp = fabs(src[i]);
if (tmp > max)
max = tmp;
}
return max;
}
void minmax(const float *src, size_t count, float *min, float *max)
{
if (count == 0)
{
*min = 0.0f;
*max = 0.0f;
return;
}
float a_min = src[0], a_max = src[0];
for (size_t i=1; i<count; ++i)
{
float tmp = src[i];
if (tmp < a_min)
a_min = tmp;
if (tmp > a_max)
a_max = tmp;
}
*min = a_min;
*max = a_max;
}
void abs_minmax(const float *src, size_t count, float *min, float *max)
{
if (count == 0)
{
*min = 0.0f;
*max = 0.0f;
return;
}
float a_min = fabs(src[0]), a_max = fabs(src[0]);
for (size_t i=1; i<count; ++i)
{
float tmp = fabs(src[i]);
if (tmp < a_min)
a_min = tmp;
if (tmp > a_max)
a_max = tmp;
}
*min = a_min;
*max = a_max;
}
size_t min_index(const float *src, size_t count)
{
if (count <= 0)
return 0;
size_t index = 0;
float vmin = src[0];
for (size_t i=1; i<count; ++i)
{
float v = src[i];
if (v < vmin)
{
index = i;
vmin = v;
}
}
return index;
}
size_t max_index(const float *src, size_t count)
{
if (count <= 0)
return 0;
size_t index = 0;
float vmax = src[0];
for (size_t i=1; i<count; ++i)
{
float v = src[i];
if (v > vmax)
{
index = i;
vmax = v;
}
}
return index;
}
size_t abs_min_index(const float *src, size_t count)
{
if (count <= 0)
return 0;
size_t index = 0;
float s = fabs(src[0]);
for (size_t i=1; i<count; ++i)
{
float d = fabs(src[i]);
if (d < s)
{
index = i;
s = d;
}
}
return index;
}
size_t abs_max_index(const float *src, size_t count)
{
if (count <= 0)
return 0;
size_t index = 0;
float s = fabs(src[0]);
for (size_t i=1; i<count; ++i)
{
float d = fabs(src[i]);
if (d > s)
{
index = i;
s = d;
}
}
return index;
}
void minmax_index(const float *src, size_t count, size_t *min, size_t *max)
{
size_t imin = 0, imax = 0;
if (count > 0)
{
float vmin = src[0];
float vmax = vmin;
for (size_t i=1; i<count; ++i)
{
float v = src[i];
if (v < vmin)
{
imin = i;
vmin = v;
}
if (v > vmax)
{
imax = i;
vmax = v;
}
}
}
*min = imin;
*max = imax;
}
void abs_minmax_index(const float *src, size_t count, size_t *min, size_t *max)
{
size_t imin = 0, imax = 0;
if (count > 0)
{
float vmin = fabs(src[0]);
float vmax = vmin;
for (size_t i=1; i<count; ++i)
{
float v = fabs(src[i]);
if (v < vmin)
{
imin = i;
vmin = v;
}
if (v > vmax)
{
imax = i;
vmax = v;
}
}
}
*min = imin;
*max = imax;
}
}
}
#endif /* PRIVATE_DSP_ARCH_GENERIC_SEARCH_H_ */
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