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Diffstat (limited to '')
-rw-r--r-- | src/output/plugins/NullOutputPlugin.cxx | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/output/plugins/NullOutputPlugin.cxx b/src/output/plugins/NullOutputPlugin.cxx new file mode 100644 index 000000000..c336d86e6 --- /dev/null +++ b/src/output/plugins/NullOutputPlugin.cxx @@ -0,0 +1,141 @@ +/* + * Copyright (C) 2003-2014 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" + +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, +}; |