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/*
Copyright (C) 2011 Fabian Kurz, DJ1YFK
$Id: pulseaudio.c 388 2011-12-18 21:28:50Z dj1yfk $
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301, USA.
PulseAudio specific functions and includes.
*/
#include <ncurses.h>
#include <stdlib.h>
#include <fcntl.h>
#include <pulse/simple.h>
#include <pulse/error.h>
extern long samplerate;
extern void *dsp_fd;
short int buf[441000]; /* 10 secs buffer */
int bufpos = 0;
void *open_dsp () {
static int opened = 0;
/* with PA we only open the device once and then leave it
opened */
if (opened) {
return dsp_fd;
}
/* The Sample format to use */
static const pa_sample_spec ss = {
.format = PA_SAMPLE_S16LE,
.rate = 44100,
.channels = 1
};
pa_simple *s = NULL;
int error;
if (!(s = pa_simple_new(NULL, "qrq", PA_STREAM_PLAYBACK, NULL,
"playback", &ss, NULL, NULL, &error))) {
fprintf(stderr, "pa_simple_new() failed: %s\n",
pa_strerror(error));
}
opened = 1;
return s;
}
/* actually just puts samples into the buffer that is played at the end
(close_audio) */
void write_audio (void *bla, int *in, int size) {
int i = 0;
for (i=0; i < size/sizeof(int); i++) {
buf[bufpos] = (short int) in[i];
bufpos++;
}
}
void close_audio (void *s) {
int e;
pa_simple_write(s, buf, bufpos*sizeof(short int), &e);
pa_simple_drain(s, &e);
bufpos = 0;
}
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