92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* sndio output driver. This file is part of Shairport.
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* Copyright (c) 2013 Dimitri Sokolyuk <demon@dim13.org>
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*
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* Modifications for audio synchronisation
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* and related work, copyright (c) Mike Brady 2014
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "audio.h"
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#include <sndio.h>
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#include <stdio.h>
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#include <unistd.h>
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static struct sio_hdl *sio;
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static struct sio_par par;
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static int init(int argc, char **argv) {
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sio = sio_open(SIO_DEVANY, SIO_PLAY, 0);
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if (!sio)
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die("sndio: cannot connect to sound server");
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sio_initpar(&par);
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par.bits = 16;
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par.rate = 44100;
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par.pchan = 2;
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par.le = SIO_LE_NATIVE;
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par.sig = 1;
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if (!sio_setpar(sio, &par))
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die("sndio: failed to set audio parameters");
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if (!sio_getpar(sio, &par))
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die("sndio: failed to get audio parameters");
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config.audio_backend_buffer_desired_length = 44100; // one second.
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config.audio_backend_latency_offset = 0;
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return 0;
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}
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static void deinit(void) { sio_close(sio); }
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static void start(int sample_rate) {
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if (sample_rate != par.rate)
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die("unexpected sample rate!");
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if (sample_format != 0)
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die("unexpected sample format!");
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sio_start(sio);
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}
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static void play(short buf[], int samples) {
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sio_write(sio, (char *)buf, samples * par.bps * par.pchan);
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}
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static void stop(void) { sio_stop(sio); }
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static void help(void) {
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printf(" There are no options for sndio audio.\n");
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printf(" Use AUDIODEVICE environment variable.\n");
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}
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static void volume(double vol) {
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unsigned int v = vol * SIO_MAXVOL;
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sio_setvol(sio, v);
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}
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audio_output audio_sndio = {.name = "sndio",
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.help = &help,
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.init = &init,
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.deinit = &deinit,
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.start = &start,
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.stop = &stop,
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.flush = NULL,
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.delay = NULL,
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.play = &play,
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.volume = &volume,
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.parameters = NULL,
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.mute = NULL};
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