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/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.
*/
#include "SndioOutputPlugin.hxx"
#include "mixer/MixerList.hxx"
#include "mixer/Listener.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
#include <sndio.h>
#include <stdexcept>
#ifndef SIO_DEVANY
/* this macro is missing in libroar-dev 1.0~beta2-3 (Debian Wheezy) */
#define SIO_DEVANY "default"
#endif
static constexpr unsigned MPD_SNDIO_BUFFER_TIME_MS = 250;
static constexpr Domain sndio_output_domain("sndio_output");
SndioOutput::SndioOutput(const ConfigBlock &block)
:AudioOutput(0),
device(block.GetBlockValue("device", SIO_DEVANY)),
buffer_time(block.GetBlockValue("buffer_time",
MPD_SNDIO_BUFFER_TIME_MS)),
raw_volume(SIO_MAXVOL)
{
}
static void
VolumeCallback(void *arg, unsigned int volume) {
((SndioOutput *)arg)->VolumeChanged(volume);
}
AudioOutput *
SndioOutput::Create(EventLoop &, const ConfigBlock &block) {
return new SndioOutput(block);
}
static bool
sndio_test_default_device()
{
auto *hdl = sio_open(SIO_DEVANY, SIO_PLAY, 0);
if (!hdl) {
FormatError(sndio_output_domain,
"Error opening default sndio device");
return false;
}
sio_close(hdl);
return true;
}
void
SndioOutput::Open(AudioFormat &audio_format)
{
struct sio_par par;
unsigned bits, rate, chans;
hdl = sio_open(device, SIO_PLAY, 0);
if (!hdl)
throw std::runtime_error("Failed to open default sndio device");
switch (audio_format.format) {
case SampleFormat::S16:
bits = 16;
break;
case SampleFormat::S24_P32:
bits = 24;
break;
case SampleFormat::S32:
bits = 32;
break;
default:
audio_format.format = SampleFormat::S16;
bits = 16;
break;
}
rate = audio_format.sample_rate;
chans = audio_format.channels;
sio_initpar(&par);
par.bits = bits;
par.rate = rate;
par.pchan = chans;
par.sig = 1;
par.le = SIO_LE_NATIVE;
par.appbufsz = rate * buffer_time / 1000;
if (!sio_setpar(hdl, &par) ||
!sio_getpar(hdl, &par)) {
sio_close(hdl);
throw std::runtime_error("Failed to set/get audio params");
}
if (par.bits != bits ||
par.rate < rate * 995 / 1000 ||
par.rate > rate * 1005 / 1000 ||
par.pchan != chans ||
par.sig != 1 ||
par.le != SIO_LE_NATIVE) {
sio_close(hdl);
throw std::runtime_error("Requested audio params cannot be satisfied");
}
// Set volume after opening fresh audio stream which does
// know nothing about previous audio streams.
sio_setvol(hdl, raw_volume);
// sio_onvol returns 0 if no volume knob is available.
// This is the case on raw audio devices rather than
// the sndiod audio server.
if (sio_onvol(hdl, VolumeCallback, this) == 0)
raw_volume = -1;
if (!sio_start(hdl)) {
sio_close(hdl);
throw std::runtime_error("Failed to start audio device");
}
}
void
SndioOutput::Close() noexcept
{
sio_close(hdl);
}
size_t
SndioOutput::Play(const void *chunk, size_t size)
{
size_t n;
n = sio_write(hdl, chunk, size);
if (n == 0 && sio_eof(hdl) != 0)
throw std::runtime_error("sndio write failed");
return n;
}
void
SndioOutput::SetVolume(unsigned int volume)
{
sio_setvol(hdl, volume * SIO_MAXVOL / 100);
}
static inline unsigned int
RawToPercent(int raw_volume) {
return raw_volume < 0 ? 100 : raw_volume * 100 / SIO_MAXVOL;
}
void
SndioOutput::VolumeChanged(int _raw_volume) {
if (raw_volume >= 0 && listener != nullptr && mixer != nullptr) {
raw_volume = _raw_volume;
listener->OnMixerVolumeChanged(*mixer,
RawToPercent(raw_volume));
}
}
unsigned int
SndioOutput::GetVolume() {
return RawToPercent(raw_volume);
}
void
SndioOutput::RegisterMixerListener(Mixer *_mixer, MixerListener *_listener) {
mixer = _mixer;
listener = _listener;
}
constexpr struct AudioOutputPlugin sndio_output_plugin = {
"sndio",
sndio_test_default_device,
SndioOutput::Create,
&sndio_mixer_plugin,
};
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