2020-01-02 16:52:30 +00:00
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/*
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** Provides an implementation of an ALSA sequencer wrapper
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**
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**---------------------------------------------------------------------------
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** Copyright 2008-2010 Randy Heit
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** Copyright 2020 Petr Mrazek
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#pragma once
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#if defined __linux__ && defined HAVE_SYSTEM_MIDI
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2020-01-04 15:00:15 +00:00
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#include "zmusic/zmusic_internal.h"
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2020-01-02 16:52:30 +00:00
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#include <vector>
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#include <string>
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typedef struct _snd_seq snd_seq_t;
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// FIXME: make not visible from outside
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struct MidiOutDeviceInternal {
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std::string Name;
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int ID = -1;
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int ClientID = -1;
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int PortNumber = -1;
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unsigned int type = 0;
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};
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// NOTE: the sequencer state is shared between actually playing MIDI music and device enumeration, therefore we keep it around.
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class AlsaSequencer {
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private:
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AlsaSequencer();
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~AlsaSequencer();
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public:
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static AlsaSequencer &Get();
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bool Open();
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void Close();
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bool IsOpen() const {
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return nullptr != handle;
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}
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int EnumerateDevices();
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const std::vector<MidiOutDeviceInternal> &GetInternalDevices();
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snd_seq_t *handle = nullptr;
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int OurId = -1;
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int error = -1;
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private:
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std::vector<MidiOutDeviceInternal> internalDevices;
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};
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#endif
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