mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2026-11-06 05:17:42 +00:00
Kacper Michajłow
24914d60df
It only wrapped math.h and mathematics.h since the fallbacks went away. Include math.h and mathematics.h directly where needed. internal.h keeps both so that the many translation units relying on them transitively keep building. Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/*
|
|
* Common code for AAC cube-root table
|
|
*
|
|
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
|
|
*
|
|
* 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 <math.h>
|
|
|
|
#include "cbrt_data.h"
|
|
#include "libavutil/attributes.h"
|
|
|
|
av_cold void ff_cbrt_dbl_tableinit(double tmp_lut[TMP_LUT_SIZE])
|
|
{
|
|
for (int idx = 0; idx < TMP_LUT_SIZE; ++idx)
|
|
tmp_lut[idx] = 1;
|
|
|
|
/* have to take care of non-squarefree numbers; notice that sqrt(LUT_SIZE) = 90;
|
|
* idx == 44 corresponds to 89. */
|
|
for (int idx = 1; idx < 45; ++idx) {
|
|
if (tmp_lut[idx] == 1) {
|
|
int i = 2 * idx + 1;
|
|
double cbrt_val = i * cbrt(i);
|
|
for (int k = i; k < LUT_SIZE; k *= i) {
|
|
// We only have to handle k, 3 * k, 5 * k,...,
|
|
// because only these are odd. The corresponding indices are
|
|
// k >> 1, (k >> 1) + k, (k >> 1) + 2 * k,...
|
|
for (int idx2 = k >> 1; idx2 < TMP_LUT_SIZE; idx2 += k)
|
|
tmp_lut[idx2] *= cbrt_val;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int idx = 45; idx < TMP_LUT_SIZE; ++idx) {
|
|
if (tmp_lut[idx] == 1) {
|
|
int i = 2 * idx + 1;
|
|
double cbrt_val = i * cbrt(i);
|
|
for (int idx2 = idx; idx2 < TMP_LUT_SIZE; idx2 += i)
|
|
tmp_lut[idx2] *= cbrt_val;
|
|
}
|
|
}
|
|
}
|