2009-03-13 18:43:16 +01:00
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/*
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2016-02-26 17:54:05 +01:00
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* Copyright 2003-2016 The Music Player Daemon Project
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2009-03-13 18:43:16 +01:00
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* http://www.musicpd.org
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2008-09-24 07:20:55 +02:00
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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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2009-03-13 18:43:16 +01:00
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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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2008-09-24 07:20:55 +02:00
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*/
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2013-04-17 01:12:05 +02:00
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#ifndef MPD_OUTPUT_INTERNAL_HXX
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#define MPD_OUTPUT_INTERNAL_HXX
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2008-09-24 07:20:55 +02:00
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2013-08-03 21:00:50 +02:00
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#include "AudioFormat.hxx"
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2013-07-29 08:10:10 +02:00
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#include "pcm/PcmBuffer.hxx"
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2013-12-28 17:42:03 +01:00
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#include "pcm/PcmDither.hxx"
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2014-01-28 11:39:12 +01:00
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#include "ReplayGainInfo.hxx"
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2016-06-22 11:15:49 +02:00
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#include "filter/Observer.hxx"
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2013-04-17 01:19:25 +02:00
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#include "thread/Mutex.hxx"
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#include "thread/Cond.hxx"
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2013-10-17 18:42:14 +02:00
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#include "thread/Thread.hxx"
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2013-11-24 20:20:57 +01:00
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#include "system/PeriodClock.hxx"
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2008-10-29 22:32:50 +01:00
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2013-08-10 18:02:44 +02:00
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class Error;
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2016-06-22 11:15:49 +02:00
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class PreparedFilter;
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2013-02-01 18:40:36 +01:00
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class Filter;
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2013-09-26 21:51:45 +02:00
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class MusicPipe;
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2014-02-05 00:02:02 +01:00
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class EventLoop;
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2014-02-05 23:20:33 +01:00
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class Mixer;
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class MixerListener;
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2014-08-12 15:56:41 +02:00
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struct MusicChunk;
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2015-01-21 22:13:44 +01:00
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struct ConfigBlock;
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2013-10-28 10:12:21 +01:00
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struct PlayerControl;
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2014-01-28 11:22:27 +01:00
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struct AudioOutputPlugin;
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2011-09-16 23:31:48 +02:00
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2014-12-24 22:11:57 +01:00
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struct AudioOutput {
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enum class Command {
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NONE,
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ENABLE,
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DISABLE,
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OPEN,
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2009-07-06 10:01:02 +02:00
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2014-12-24 22:11:57 +01:00
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/**
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* This command is invoked when the input audio format
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* changes.
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*/
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REOPEN,
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2009-07-06 10:01:02 +02:00
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2014-12-24 22:11:57 +01:00
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CLOSE,
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PAUSE,
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2009-11-09 22:16:26 +01:00
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2014-12-24 22:11:57 +01:00
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/**
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* Drains the internal (hardware) buffers of the device. This
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* operation may take a while to complete.
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*/
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DRAIN,
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2009-11-09 22:16:26 +01:00
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2014-12-24 22:11:57 +01:00
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CANCEL,
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KILL
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};
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2009-02-16 00:43:12 +01:00
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2008-09-24 07:21:46 +02:00
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/**
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* The device's configured display name.
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*/
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2008-09-24 07:20:55 +02:00
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const char *name;
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2008-09-24 07:21:46 +02:00
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/**
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* The plugin which implements this output device.
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*/
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2014-01-29 00:53:49 +01:00
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const AudioOutputPlugin &plugin;
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2008-09-24 07:20:55 +02:00
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2009-03-26 18:23:23 +01:00
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/**
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* The #mixer object associated with this audio output device.
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2013-10-19 18:19:03 +02:00
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* May be nullptr if none is available, or if software volume is
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2009-03-26 18:23:23 +01:00
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* configured.
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*/
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2016-06-22 17:52:52 +02:00
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Mixer *mixer = nullptr;
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2009-03-26 18:23:23 +01:00
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2012-09-25 23:28:53 +02:00
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/**
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* Will this output receive tags from the decoder? The
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* default is true, but it may be configured to false to
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* suppress sending tags to the output.
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*/
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bool tags;
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2010-03-03 20:29:33 +01:00
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/**
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* Shall this output always play something (i.e. silence),
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* even when playback is stopped?
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*/
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bool always_on;
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2008-10-29 20:49:51 +01:00
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/**
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* Has the user enabled this device?
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*/
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2016-06-22 17:52:52 +02:00
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bool enabled = true;
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2008-10-29 20:49:51 +01:00
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2009-10-23 10:55:52 +02:00
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/**
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* Is this device actually enabled, i.e. the "enable" method
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* has succeeded?
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*/
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2016-06-22 17:52:52 +02:00
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bool really_enabled = false;
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2009-10-23 10:55:52 +02:00
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2008-09-24 07:21:46 +02:00
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/**
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* Is the device (already) open and functional?
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2009-03-25 17:07:15 +01:00
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*
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* This attribute may only be modified by the output thread.
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* It is protected with #mutex: write accesses inside the
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* output thread and read accesses outside of it may only be
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* performed while the lock is held.
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2008-09-24 07:21:46 +02:00
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*/
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2016-06-22 17:52:52 +02:00
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bool open = false;
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2008-09-24 07:21:46 +02:00
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2009-08-14 11:52:12 +02:00
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/**
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* Is the device paused? i.e. the output thread is in the
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* ao_pause() loop.
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*/
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2016-06-22 17:52:52 +02:00
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bool pause = false;
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2009-08-14 11:52:12 +02:00
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2011-09-01 07:13:21 +02:00
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/**
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* When this flag is set, the output thread will not do any
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* playback. It will wait until the flag is cleared.
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*
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* This is used to synchronize the "clear" operation on the
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* shared music pipe during the CANCEL command.
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*/
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2016-06-22 17:52:52 +02:00
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bool allow_play = true;
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2011-09-01 07:13:21 +02:00
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2013-11-06 23:47:30 +01:00
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/**
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* True while the OutputThread is inside ao_play(). This
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* means the PlayerThread does not need to wake up the
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* OutputThread when new chunks are added to the MusicPipe,
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* because the OutputThread is already watching that.
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*/
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2016-06-22 17:52:52 +02:00
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bool in_playback_loop = false;
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2013-11-06 23:47:30 +01:00
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/**
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* Has the OutputThread been woken up to play more chunks?
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* This is set by audio_output_play() and reset by ao_play()
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* to reduce the number of duplicate wakeups.
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*/
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2016-06-22 17:52:52 +02:00
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bool woken_for_play = false;
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2013-11-06 23:47:30 +01:00
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2016-06-22 11:15:49 +02:00
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ReplayGainMode replay_gain_mode = REPLAY_GAIN_OFF;
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2008-10-29 22:32:50 +01:00
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/**
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2013-10-19 18:19:03 +02:00
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* If not nullptr, the device has failed, and this timer is used
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2009-02-28 20:43:23 +01:00
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* to estimate how long it should stay disabled (unless
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* explicitly reopened with "play").
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2008-10-29 22:32:50 +01:00
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*/
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2013-11-24 20:20:57 +01:00
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PeriodClock fail_timer;
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2008-10-29 22:32:50 +01:00
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2009-10-21 22:37:28 +02:00
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/**
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* The configured audio format.
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*/
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2013-08-03 21:00:50 +02:00
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AudioFormat config_audio_format;
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2009-10-21 22:37:28 +02:00
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2008-09-24 07:21:46 +02:00
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/**
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* The audio_format in which audio data is received from the
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* player thread (which in turn receives it from the decoder).
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*/
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2013-08-03 21:00:50 +02:00
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AudioFormat in_audio_format;
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2008-09-24 07:21:46 +02:00
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/**
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* The audio_format which is really sent to the device. This
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2009-02-10 21:50:51 +01:00
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* is basically config_audio_format (if configured) or
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* in_audio_format, but may have been modified by
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2008-09-24 07:21:46 +02:00
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* plugin->open().
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*/
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2013-08-03 21:00:50 +02:00
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AudioFormat out_audio_format;
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2008-09-24 07:21:46 +02:00
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2010-05-02 15:31:31 +02:00
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/**
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* The buffer used to allocate the cross-fading result.
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*/
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2013-07-29 08:10:10 +02:00
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PcmBuffer cross_fade_buffer;
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2010-05-02 15:31:31 +02:00
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2013-12-28 17:42:03 +01:00
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/**
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* The dithering state for cross-fading two streams.
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*/
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PcmDither cross_fade_dither;
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2009-07-06 10:01:47 +02:00
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/**
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* The filter object of this audio output. This is an
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* instance of chain_filter_plugin.
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*/
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2016-06-22 11:15:49 +02:00
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PreparedFilter *prepared_filter = nullptr;
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2016-09-04 15:05:42 +02:00
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Filter *filter_instance = nullptr;
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2009-07-06 10:01:47 +02:00
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2016-07-01 18:23:53 +02:00
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/**
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* The #VolumeFilter instance of this audio output. It is
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* used by the #SoftwareMixer.
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*/
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2016-06-22 11:15:49 +02:00
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FilterObserver volume_filter;
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2016-07-01 18:23:53 +02:00
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2010-02-14 17:04:39 +01:00
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/**
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* The replay_gain_filter_plugin instance of this audio
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* output.
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*/
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2016-06-22 11:15:49 +02:00
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PreparedFilter *prepared_replay_gain_filter = nullptr;
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2016-09-04 15:05:42 +02:00
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Filter *replay_gain_filter_instance = nullptr;
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2010-02-14 17:04:39 +01:00
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/**
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* The serial number of the last replay gain info. 0 means no
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* replay gain info was available.
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*/
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unsigned replay_gain_serial;
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2010-05-02 15:57:59 +02:00
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/**
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* The replay_gain_filter_plugin instance of this audio
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* output, to be applied to the second chunk during
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* cross-fading.
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*/
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2016-06-22 11:15:49 +02:00
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PreparedFilter *prepared_other_replay_gain_filter = nullptr;
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2016-09-04 15:05:42 +02:00
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Filter *other_replay_gain_filter_instance = nullptr;
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2010-05-02 15:57:59 +02:00
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/**
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* The serial number of the last replay gain info by the
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* "other" chunk during cross-fading.
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*/
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unsigned other_replay_gain_serial;
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2009-07-06 10:01:47 +02:00
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/**
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* The convert_filter_plugin instance of this audio output.
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* It is the last item in the filter chain, and is responsible
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* for converting the input data into the appropriate format
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* for this audio output.
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*/
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2016-06-22 11:15:49 +02:00
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FilterObserver convert_filter;
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2008-09-24 07:20:55 +02:00
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2008-09-24 07:21:46 +02:00
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/**
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2013-10-19 18:19:03 +02:00
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* The thread handle, or nullptr if the output thread isn't
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2008-09-24 07:21:46 +02:00
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* running.
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*/
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2013-10-17 18:42:14 +02:00
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Thread thread;
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2008-09-24 07:21:46 +02:00
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/**
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* The next command to be performed by the output thread.
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*/
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2016-06-22 17:52:52 +02:00
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Command command = Command::NONE;
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2008-09-24 07:21:46 +02:00
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/**
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2009-03-09 19:25:26 +01:00
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* The music pipe which provides music chunks to be played.
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2008-09-24 07:21:46 +02:00
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*/
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2013-09-26 21:51:45 +02:00
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const MusicPipe *pipe;
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2008-09-24 07:20:55 +02:00
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2009-03-09 19:25:26 +01:00
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/**
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2014-01-29 09:23:57 +01:00
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* This mutex protects #open, #fail_timer, #current_chunk and
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* #current_chunk_finished.
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2009-03-09 19:25:26 +01:00
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*/
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2013-04-17 01:19:25 +02:00
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Mutex mutex;
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2009-03-09 19:25:26 +01:00
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2009-10-29 17:06:40 +01:00
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/**
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* This condition object wakes up the output thread after
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* #command has been set.
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*/
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2013-04-17 01:19:25 +02:00
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Cond cond;
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2009-10-29 17:06:40 +01:00
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2009-11-03 21:08:48 +01:00
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/**
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2013-10-28 10:12:21 +01:00
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* The PlayerControl object which "owns" this output. This
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2009-11-03 21:08:48 +01:00
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* object is needed to signal command completion.
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*/
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2013-10-28 10:12:21 +01:00
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PlayerControl *player_control;
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2009-11-03 21:08:48 +01:00
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2009-03-09 19:25:26 +01:00
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/**
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2014-08-12 15:56:41 +02:00
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* The #MusicChunk which is currently being played. All
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2009-03-09 19:25:26 +01:00
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* chunks before this one may be returned to the
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* #music_buffer, because they are not going to be used by
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* this output anymore.
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*/
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2014-08-12 15:56:41 +02:00
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const MusicChunk *current_chunk;
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2009-03-09 19:25:26 +01:00
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/**
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2014-01-29 09:23:57 +01:00
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* Has the output finished playing #current_chunk?
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2009-03-09 19:25:26 +01:00
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*/
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2014-01-29 09:23:57 +01:00
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bool current_chunk_finished;
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2014-01-28 12:24:48 +01:00
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2014-01-28 23:39:48 +01:00
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AudioOutput(const AudioOutputPlugin &_plugin);
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2014-01-28 12:24:48 +01:00
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~AudioOutput();
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2014-01-28 11:39:12 +01:00
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2015-01-21 22:13:44 +01:00
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bool Configure(const ConfigBlock &block, Error &error);
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2014-01-28 11:39:12 +01:00
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void StartThread();
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void StopThread();
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void Finish();
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bool IsOpen() const {
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return open;
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}
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bool IsCommandFinished() const {
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2014-12-24 22:11:57 +01:00
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return command == Command::NONE;
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2014-01-28 11:39:12 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Waits for command completion.
|
|
|
|
*
|
|
|
|
* Caller must lock the mutex.
|
|
|
|
*/
|
|
|
|
void WaitForCommand();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Sends a command, but does not wait for completion.
|
|
|
|
*
|
|
|
|
* Caller must lock the mutex.
|
|
|
|
*/
|
2014-12-24 22:11:57 +01:00
|
|
|
void CommandAsync(Command cmd);
|
2014-01-28 11:39:12 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Sends a command to the #AudioOutput object and waits for
|
|
|
|
* completion.
|
|
|
|
*
|
|
|
|
* Caller must lock the mutex.
|
|
|
|
*/
|
2014-12-24 22:11:57 +01:00
|
|
|
void CommandWait(Command cmd);
|
2014-01-28 11:39:12 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Lock the #AudioOutput object and execute the command
|
|
|
|
* synchronously.
|
|
|
|
*/
|
2014-12-24 22:11:57 +01:00
|
|
|
void LockCommandWait(Command cmd);
|
2014-01-28 11:39:12 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Enables the device.
|
|
|
|
*/
|
|
|
|
void LockEnableWait();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Disables the device.
|
|
|
|
*/
|
|
|
|
void LockDisableWait();
|
|
|
|
|
|
|
|
void LockPauseAsync();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Same LockCloseWait(), but expects the lock to be
|
|
|
|
* held by the caller.
|
|
|
|
*/
|
|
|
|
void CloseWait();
|
|
|
|
void LockCloseWait();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Closes the audio output, but if the "always_on" flag is set, put it
|
|
|
|
* into pause mode instead.
|
|
|
|
*/
|
|
|
|
void LockRelease();
|
|
|
|
|
2016-06-22 11:15:49 +02:00
|
|
|
void SetReplayGainMode(ReplayGainMode _mode) {
|
|
|
|
replay_gain_mode = _mode;
|
|
|
|
}
|
2014-01-28 11:39:12 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Caller must lock the mutex.
|
|
|
|
*/
|
|
|
|
bool Open(const AudioFormat audio_format, const MusicPipe &mp);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Opens or closes the device, depending on the "enabled"
|
|
|
|
* flag.
|
|
|
|
*
|
|
|
|
* @return true if the device is open
|
|
|
|
*/
|
|
|
|
bool LockUpdate(const AudioFormat audio_format,
|
|
|
|
const MusicPipe &mp);
|
|
|
|
|
|
|
|
void LockPlay();
|
|
|
|
|
|
|
|
void LockDrainAsync();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Clear the "allow_play" flag and send the "CANCEL" command
|
|
|
|
* asynchronously. To finish the operation, the caller has to
|
|
|
|
* call LockAllowPlay().
|
|
|
|
*/
|
|
|
|
void LockCancelAsync();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Set the "allow_play" and signal the thread.
|
|
|
|
*/
|
|
|
|
void LockAllowPlay();
|
2014-01-29 09:12:41 +01:00
|
|
|
|
|
|
|
private:
|
|
|
|
void CommandFinished();
|
|
|
|
|
|
|
|
bool Enable();
|
|
|
|
void Disable();
|
|
|
|
|
|
|
|
void Open();
|
|
|
|
void Close(bool drain);
|
|
|
|
void Reopen();
|
|
|
|
|
2014-10-23 23:24:01 +02:00
|
|
|
/**
|
|
|
|
* Close the output plugin.
|
|
|
|
*
|
|
|
|
* Mutex must not be locked.
|
|
|
|
*/
|
|
|
|
void CloseOutput(bool drain);
|
|
|
|
|
2016-09-04 14:32:09 +02:00
|
|
|
/**
|
|
|
|
* Throws std::runtime_error on error.
|
|
|
|
*/
|
|
|
|
AudioFormat OpenFilter(AudioFormat &format);
|
2014-10-24 00:28:58 +02:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Mutex must not be locked.
|
|
|
|
*/
|
2014-01-29 09:12:41 +01:00
|
|
|
void CloseFilter();
|
2014-10-24 00:28:58 +02:00
|
|
|
|
2014-01-29 09:12:41 +01:00
|
|
|
void ReopenFilter();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Wait until the output's delay reaches zero.
|
|
|
|
*
|
|
|
|
* @return true if playback should be continued, false if a
|
|
|
|
* command was issued
|
|
|
|
*/
|
|
|
|
bool WaitForDelay();
|
|
|
|
|
|
|
|
gcc_pure
|
2014-08-12 15:56:41 +02:00
|
|
|
const MusicChunk *GetNextChunk() const;
|
2014-01-29 09:12:41 +01:00
|
|
|
|
2014-08-12 15:56:41 +02:00
|
|
|
bool PlayChunk(const MusicChunk *chunk);
|
2014-01-29 09:12:41 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Plays all remaining chunks, until the tail of the pipe has
|
|
|
|
* been reached (and no more chunks are queued), or until a
|
|
|
|
* command is received.
|
|
|
|
*
|
|
|
|
* @return true if at least one chunk has been available,
|
|
|
|
* false if the tail of the pipe was already reached
|
|
|
|
*/
|
|
|
|
bool Play();
|
|
|
|
|
|
|
|
void Pause();
|
|
|
|
|
|
|
|
/**
|
|
|
|
* The OutputThread.
|
|
|
|
*/
|
|
|
|
void Task();
|
|
|
|
static void Task(void *arg);
|
2008-09-24 07:20:55 +02:00
|
|
|
};
|
|
|
|
|
2008-09-24 07:21:46 +02:00
|
|
|
/**
|
|
|
|
* Notify object used by the thread's client, i.e. we will send a
|
|
|
|
* notify signal to this object, expecting the caller to wait on it.
|
|
|
|
*/
|
2008-09-24 07:20:55 +02:00
|
|
|
extern struct notify audio_output_client_notify;
|
|
|
|
|
2014-01-28 11:34:09 +01:00
|
|
|
AudioOutput *
|
2015-01-21 22:13:44 +01:00
|
|
|
audio_output_new(EventLoop &event_loop, const ConfigBlock &block,
|
2014-02-05 23:20:33 +01:00
|
|
|
MixerListener &mixer_listener,
|
2013-10-28 10:12:21 +01:00
|
|
|
PlayerControl &pc,
|
2013-08-10 18:02:44 +02:00
|
|
|
Error &error);
|
2011-09-16 23:31:48 +02:00
|
|
|
|
2011-08-30 22:28:15 +02:00
|
|
|
void
|
2014-01-28 11:34:09 +01:00
|
|
|
audio_output_free(AudioOutput *ao);
|
2011-08-30 22:28:15 +02:00
|
|
|
|
2008-09-24 07:20:55 +02:00
|
|
|
#endif
|