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/*
* Copyright (C) 2003-2011 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 "config.h"
#include "null_output_plugin.h"
#include "output_api.h"
#include "timer.h"
#include <glib.h>
#include <assert.h>
struct null_data {
struct audio_output base;
bool sync;
struct timer *timer;
};
static struct audio_output *
null_init(const struct config_param *param, GError **error_r)
{
struct null_data *nd = g_new(struct null_data, 1);
if (!ao_base_init(&nd->base, &null_output_plugin, param, error_r)) {
g_free(nd);
return NULL;
}
nd->sync = config_get_block_bool(param, "sync", true);
return &nd->base;
}
static void
null_finish(struct audio_output *ao)
{
struct null_data *nd = (struct null_data *)ao;
ao_base_finish(&nd->base);
g_free(nd);
}
static bool
null_open(struct audio_output *ao, struct audio_format *audio_format,
G_GNUC_UNUSED GError **error)
{
struct null_data *nd = (struct null_data *)ao;
if (nd->sync)
nd->timer = timer_new(audio_format);
return true;
}
static void
null_close(struct audio_output *ao)
{
struct null_data *nd = (struct null_data *)ao;
if (nd->sync)
timer_free(nd->timer);
}
static unsigned
null_delay(struct audio_output *ao)
{
struct null_data *nd = (struct null_data *)ao;
return nd->sync && nd->timer->started
? timer_delay(nd->timer)
: 0;
}
static size_t
null_play(struct audio_output *ao, G_GNUC_UNUSED const void *chunk, size_t size,
G_GNUC_UNUSED GError **error)
{
struct null_data *nd = (struct null_data *)ao;
struct timer *timer = nd->timer;
if (!nd->sync)
return size;
if (!timer->started)
timer_start(timer);
timer_add(timer, size);
return size;
}
static void
null_cancel(struct audio_output *ao)
{
struct null_data *nd = (struct null_data *)ao;
if (!nd->sync)
return;
timer_reset(nd->timer);
}
const struct audio_output_plugin null_output_plugin = {
.name = "null",
.init = null_init,
.finish = null_finish,
.open = null_open,
.close = null_close,
.delay = null_delay,
.play = null_play,
.cancel = null_cancel,
};
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