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/*
* Copyright (C) 2003-2013 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 "NullOutputPlugin.hxx"
#include "OutputAPI.hxx"
#include "Timer.hxx"
#include <assert.h>
struct NullOutput {
struct audio_output base;
bool sync;
Timer *timer;
bool Initialize(const config_param ¶m, Error &error) {
return ao_base_init(&base, &null_output_plugin, param,
error);
}
void Deinitialize() {
ao_base_finish(&base);
}
};
static struct audio_output *
null_init(const config_param ¶m, Error &error)
{
NullOutput *nd = new NullOutput();
if (!nd->Initialize(param, error)) {
delete nd;
return nullptr;
}
nd->sync = param.GetBlockValue("sync", true);
return &nd->base;
}
static void
null_finish(struct audio_output *ao)
{
NullOutput *nd = (NullOutput *)ao;
nd->Deinitialize();
delete nd;
}
static bool
null_open(struct audio_output *ao, AudioFormat &audio_format,
gcc_unused Error &error)
{
NullOutput *nd = (NullOutput *)ao;
if (nd->sync)
nd->timer = new Timer(audio_format);
return true;
}
static void
null_close(struct audio_output *ao)
{
NullOutput *nd = (NullOutput *)ao;
if (nd->sync)
delete nd->timer;
}
static unsigned
null_delay(struct audio_output *ao)
{
NullOutput *nd = (NullOutput *)ao;
return nd->sync && nd->timer->IsStarted()
? nd->timer->GetDelay()
: 0;
}
static size_t
null_play(struct audio_output *ao, gcc_unused const void *chunk, size_t size,
gcc_unused Error &error)
{
NullOutput *nd = (NullOutput *)ao;
Timer *timer = nd->timer;
if (!nd->sync)
return size;
if (!timer->IsStarted())
timer->Start();
timer->Add(size);
return size;
}
static void
null_cancel(struct audio_output *ao)
{
NullOutput *nd = (NullOutput *)ao;
if (!nd->sync)
return;
nd->timer->Reset();
}
const struct audio_output_plugin null_output_plugin = {
"null",
nullptr,
null_init,
null_finish,
nullptr,
nullptr,
null_open,
null_close,
null_delay,
nullptr,
null_play,
nullptr,
null_cancel,
nullptr,
nullptr,
};
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