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/*
* MOC - music on console
*
* SNDIO sound driver for MOC by Alexander Polakov.
* Copyright (C) 2011 Alexander Polakov <polachok@gmail.com>
*
* 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.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_SNDIO_H
# include <sndio.h>
#endif
#include <assert.h>
#include "common.h"
#include "audio.h"
#include "log.h"
#define PCT_TO_SIO(pct) ((127 * (pct) + 50) / 100)
#define SIO_TO_PCT(vol) ((100 * (vol) + 64) / 127)
static struct sio_hdl *hdl = NULL;
static int curvol = 100;
static struct sound_params params = { 0, 0, 0 };
static void sndio_close ();
static void volume_cb (void *unused ATTR_UNUSED, unsigned int vol)
{
curvol = SIO_TO_PCT(vol);
}
static int sndio_init (struct output_driver_caps *caps)
{
assert (caps != NULL);
caps->formats = SFMT_S8 | SFMT_U8 | SFMT_U16 | SFMT_S16 | SFMT_NE;
caps->min_channels = 1;
caps->max_channels = 2;
return 1;
}
static void sndio_shutdown ()
{
if (hdl)
sndio_close ();
}
/* Return 0 on failure. */
static int sndio_open (struct sound_params *sound_params)
{
struct sio_par par;
assert (hdl == NULL);
if ((hdl = sio_open (NULL, SIO_PLAY, 0)) == NULL)
return 0;
params = *sound_params;
sio_initpar (&par);
/* Add volume change callback. */
sio_onvol (hdl, volume_cb, NULL);
par.rate = sound_params->rate;
par.pchan = sound_params->channels;
par.bits = (((sound_params->fmt & SFMT_S8) ||
(sound_params->fmt & SFMT_U8)) ? 8 : 16);
par.le = SIO_LE_NATIVE;
par.sig = (((sound_params->fmt & SFMT_S16) ||
(sound_params->fmt & SFMT_S8)) ? 1 : 0);
par.round = par.rate / 8;
par.appbufsz = par.round * 2;
logit ("rate %d pchan %d bits %d sign %d",
par.rate, par.pchan, par.bits, par.sig);
if (!sio_setpar (hdl, &par) || !sio_getpar (hdl, &par)
|| !sio_start (hdl)) {
logit ("Failed to set sndio parameters.");
sio_close (hdl);
hdl = NULL;
return 0;
}
sio_setvol (hdl, PCT_TO_SIO(curvol));
return 1;
}
/* Return the number of bytes played, or -1 on error. */
static int sndio_play (const char *buff, const size_t size)
{
int count;
assert (hdl != NULL);
count = (int) sio_write (hdl, buff, size);
if (!count && sio_eof (hdl))
return -1;
return count;
}
static void sndio_close ()
{
assert (hdl != NULL);
sio_stop (hdl);
sio_close (hdl);
hdl = NULL;
}
static int sndio_read_mixer ()
{
return curvol;
}
static void sndio_set_mixer (int vol)
{
if (hdl != NULL)
sio_setvol (hdl, PCT_TO_SIO (vol));
}
static int sndio_get_buff_fill ()
{
assert (hdl != NULL);
/* Since we cannot stop SNDIO playing the samples already in
* its buffer, there will never be anything left unheard. */
return 0;
}
static int sndio_reset ()
{
assert (hdl != NULL);
/* SNDIO will continue to play the samples already in its buffer
* regardless of what we do, so there's nothing we can do. */
return 1;
}
static int sndio_get_rate ()
{
assert (hdl != NULL);
return params.rate;
}
static void sndio_toggle_mixer_channel ()
{
assert (hdl != NULL);
}
static char *sndio_get_mixer_channel_name ()
{
return xstrdup ("moc");
}
void sndio_funcs (struct hw_funcs *funcs)
{
funcs->init = sndio_init;
funcs->shutdown = sndio_shutdown;
funcs->open = sndio_open;
funcs->close = sndio_close;
funcs->play = sndio_play;
funcs->read_mixer = sndio_read_mixer;
funcs->set_mixer = sndio_set_mixer;
funcs->get_buff_fill = sndio_get_buff_fill;
funcs->reset = sndio_reset;
funcs->get_rate = sndio_get_rate;
funcs->toggle_mixer_channel = sndio_toggle_mixer_channel;
funcs->get_mixer_channel_name = sndio_get_mixer_channel_name;
}
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