2020-06-15 14:18:57 +00:00
|
|
|
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
|
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
|
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
|
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
|
|
|
│ │
|
2020-12-28 01:18:44 +00:00
|
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
|
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
|
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
2020-06-15 14:18:57 +00:00
|
|
|
│ │
|
2020-12-28 01:18:44 +00:00
|
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
|
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
|
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
|
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
|
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
|
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
|
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
|
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
2020-06-15 14:18:57 +00:00
|
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
|
|
|
#include "libc/limits.h"
|
|
|
|
|
#include "libc/macros.h"
|
|
|
|
|
#include "libc/math.h"
|
|
|
|
|
#include "libc/str/str.h"
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* Converts floating point audio samples to pulse code modulation.
|
|
|
|
|
*
|
|
|
|
|
* @param rdi is number of sample chunks
|
|
|
|
|
* @param rsi points to aligned pcm [-32k,+32k] output memory
|
|
|
|
|
* @param rdx points to aligned float32 [-1,+1] input memory
|
|
|
|
|
*/
|
|
|
|
|
void float2short(size_t n, short pcm16[n][8], const float binary32[n][8]) {
|
|
|
|
|
size_t i, j;
|
|
|
|
|
float f[8], w[8];
|
|
|
|
|
for (i = 0; i < n; ++i) {
|
|
|
|
|
for (j = 0; j < 8; ++j) {
|
|
|
|
|
pcm16[i][j] =
|
|
|
|
|
MIN(SHRT_MAX, MAX(SHRT_MIN, floorf(binary32[i][j] * (SHRT_MAX + 1))));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
