144 lines
2.7 KiB
C++
144 lines
2.7 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "NullOutputPlugin.hxx"
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#include "OutputAPI.hxx"
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#include "Timer.hxx"
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#include <assert.h>
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struct NullOutput {
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struct audio_output base;
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bool sync;
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Timer *timer;
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bool Initialize(const config_param ¶m, GError **error_r) {
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return ao_base_init(&base, &null_output_plugin, param,
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error_r);
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}
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void Deinitialize() {
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ao_base_finish(&base);
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}
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};
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static struct audio_output *
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null_init(const config_param ¶m, GError **error_r)
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{
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NullOutput *nd = new NullOutput();
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if (!nd->Initialize(param, error_r)) {
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delete nd;
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return nullptr;
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}
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nd->sync = param.GetBlockValue("sync", true);
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return &nd->base;
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}
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static void
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null_finish(struct audio_output *ao)
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{
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NullOutput *nd = (NullOutput *)ao;
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nd->Deinitialize();
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delete nd;
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}
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static bool
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null_open(struct audio_output *ao, AudioFormat &audio_format,
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gcc_unused GError **error)
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{
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NullOutput *nd = (NullOutput *)ao;
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if (nd->sync)
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nd->timer = new Timer(audio_format);
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return true;
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}
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static void
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null_close(struct audio_output *ao)
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{
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NullOutput *nd = (NullOutput *)ao;
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if (nd->sync)
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delete nd->timer;
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}
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static unsigned
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null_delay(struct audio_output *ao)
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{
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NullOutput *nd = (NullOutput *)ao;
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return nd->sync && nd->timer->IsStarted()
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? nd->timer->GetDelay()
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: 0;
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}
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static size_t
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null_play(struct audio_output *ao, gcc_unused const void *chunk, size_t size,
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gcc_unused GError **error)
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{
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NullOutput *nd = (NullOutput *)ao;
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Timer *timer = nd->timer;
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if (!nd->sync)
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return size;
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if (!timer->IsStarted())
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timer->Start();
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timer->Add(size);
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return size;
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}
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static void
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null_cancel(struct audio_output *ao)
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{
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NullOutput *nd = (NullOutput *)ao;
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if (!nd->sync)
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return;
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nd->timer->Reset();
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}
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const struct audio_output_plugin null_output_plugin = {
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"null",
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nullptr,
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null_init,
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null_finish,
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nullptr,
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nullptr,
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null_open,
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null_close,
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null_delay,
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nullptr,
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null_play,
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nullptr,
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null_cancel,
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nullptr,
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nullptr,
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};
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