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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../audioOutput.h"
#ifdef HAVE_PULSE
#include "../conf.h"
#include "../log.h"
#include "../os_compat.h"
#include <pulse/simple.h>
#include <pulse/error.h>
#define MPD_PULSE_NAME "mpd"
#define CONN_ATTEMPT_INTERVAL 60
typedef struct _PulseData {
pa_simple *s;
char *server;
char *sink;
int connAttempts;
time_t lastAttempt;
} PulseData;
static PulseData *newPulseData(void)
{
PulseData *ret;
ret = xmalloc(sizeof(PulseData));
ret->s = NULL;
ret->server = NULL;
ret->sink = NULL;
ret->connAttempts = 0;
ret->lastAttempt = 0;
return ret;
}
static void freePulseData(PulseData * pd)
{
if (pd->server)
free(pd->server);
if (pd->sink)
free(pd->sink);
free(pd);
}
static int pulse_initDriver(AudioOutput * audioOutput, ConfigParam * param)
{
BlockParam *server = NULL;
BlockParam *sink = NULL;
PulseData *pd;
if (param) {
server = getBlockParam(param, "server");
sink = getBlockParam(param, "sink");
}
pd = newPulseData();
pd->server = server ? xstrdup(server->value) : NULL;
pd->sink = sink ? xstrdup(sink->value) : NULL;
audioOutput->data = pd;
return 0;
}
static void pulse_finishDriver(AudioOutput * audioOutput)
{
freePulseData((PulseData *) audioOutput->data);
}
static int pulse_testDefault(void)
{
pa_simple *s;
pa_sample_spec ss;
int error;
ss.format = PA_SAMPLE_S16NE;
ss.rate = 44100;
ss.channels = 2;
s = pa_simple_new(NULL, MPD_PULSE_NAME, PA_STREAM_PLAYBACK, NULL,
MPD_PULSE_NAME, &ss, NULL, NULL, &error);
if (!s) {
WARNING("Cannot connect to default PulseAudio server: %s\n",
pa_strerror(error));
return -1;
}
pa_simple_free(s);
return 0;
}
static int pulse_openDevice(AudioOutput * audioOutput)
{
PulseData *pd;
struct audio_format *audioFormat;
pa_sample_spec ss;
time_t t;
int error;
t = time(NULL);
pd = audioOutput->data;
audioFormat = &audioOutput->outAudioFormat;
if (pd->connAttempts != 0 &&
(t - pd->lastAttempt) < CONN_ATTEMPT_INTERVAL)
return -1;
pd->connAttempts++;
pd->lastAttempt = t;
if (audioFormat->bits != 16) {
ERROR("PulseAudio doesn't support %i bit audio\n",
audioFormat->bits);
return -1;
}
ss.format = PA_SAMPLE_S16NE;
ss.rate = audioFormat->sampleRate;
ss.channels = audioFormat->channels;
pd->s = pa_simple_new(pd->server, MPD_PULSE_NAME, PA_STREAM_PLAYBACK,
pd->sink, audioOutput->name, &ss, NULL, NULL,
&error);
if (!pd->s) {
ERROR("Cannot connect to server in PulseAudio output "
"\"%s\" (attempt %i): %s\n", audioOutput->name,
pd->connAttempts, pa_strerror(error));
return -1;
}
pd->connAttempts = 0;
audioOutput->open = 1;
DEBUG("PulseAudio output \"%s\" connected and playing %i bit, %i "
"channel audio at %i Hz\n", audioOutput->name, audioFormat->bits,
audioFormat->channels, audioFormat->sampleRate);
return 0;
}
static void pulse_dropBufferedAudio(AudioOutput * audioOutput)
{
PulseData *pd;
int error;
pd = audioOutput->data;
if (pa_simple_flush(pd->s, &error) < 0)
WARNING("Flush failed in PulseAudio output \"%s\": %s\n",
audioOutput->name, pa_strerror(error));
}
static void pulse_closeDevice(AudioOutput * audioOutput)
{
PulseData *pd;
pd = audioOutput->data;
if (pd->s) {
pa_simple_drain(pd->s, NULL);
pa_simple_free(pd->s);
}
audioOutput->open = 0;
}
static int pulse_playAudio(AudioOutput * audioOutput,
const char *playChunk, size_t size)
{
PulseData *pd;
int error;
pd = audioOutput->data;
if (pa_simple_write(pd->s, playChunk, size, &error) < 0) {
ERROR("PulseAudio output \"%s\" disconnecting due to write "
"error: %s\n", audioOutput->name, pa_strerror(error));
pulse_closeDevice(audioOutput);
return -1;
}
return 0;
}
AudioOutputPlugin pulsePlugin = {
"pulse",
pulse_testDefault,
pulse_initDriver,
pulse_finishDriver,
pulse_openDevice,
pulse_playAudio,
pulse_dropBufferedAudio,
pulse_closeDevice,
NULL, /* sendMetadataFunc */
};
#else /* HAVE_PULSE */
DISABLED_AUDIO_OUTPUT_PLUGIN(pulsePlugin)
#endif /* HAVE_PULSE */
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