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example.d
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example.d
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/*
* Copyright (c) 2021 Benjamin Baier <[email protected]>
*
* Permission to use, copy, modify, and 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.
*
* 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.
*/
import std.stdio;
import std.math;
import std.conv;
import deimos.sndio;
enum SG_SIG = 1;
enum SG_BITS = 16;
enum SG_PCHAN = 2;
enum SG_RATE = 44100;
enum SG_FRAMELEN = SG_BITS / 8 * SG_PCHAN;
static int
fill_sine(short* buf, int bytelen, int hertz)
{
double rad = 0.0;
int steps = SG_RATE / hertz;
double stepwidth = (2 * PI) / steps;
int pos;
for (pos = 0; pos * SG_FRAMELEN < bytelen; pos++) {
short amp = cast(short)(32767 * sin(rad));
*buf = amp;
buf++;
*buf = amp;
buf++;
rad += stepwidth;
}
for (; pos % steps != 0; pos--) {
}
return pos * SG_FRAMELEN;
}
void main(string[] args)
{
sio_par par;
short[SG_RATE * SG_PCHAN] buf;
if (args.length != 3) {
stderr.writeln("usage: sndio-example [hz] [seconds]");
return;
}
sio_hdl* hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0);
if (hdl == null) {
stderr.writeln("sio_open");
return;
}
sio_initpar(&par);
par.sig = SG_SIG;
par.bits = SG_BITS;
par.pchan = SG_PCHAN;
par.rate = SG_RATE;
par.le = SIO_LE_NATIVE;
auto success = sio_setpar(hdl, &par);
if (success == 0) {
stderr.writeln("sio_setpar");
return;
}
auto success0 = sio_start(hdl);
if (success0 == 0) {
stderr.writeln("sio_start");
return;
}
int hz = to!int(args[1]);
int size = fill_sine(cast(short*)buf, buf.length, hz);
for (int i; i < to!int(args[2]) * 2; i++) {
if (!sio_write(hdl, cast(char*)buf, size))
break;
}
sio_stop(hdl);
sio_close(hdl);
}