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Merge pull request #238 from jonathangray/sndio_midi
MIDI: add sndio midi backend
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/* ScummVM - Graphic Adventure Engine | ||
* | ||
* ScummVM is the legal property of its developers, whose names | ||
* are too numerous to list here. Please refer to the COPYRIGHT | ||
* file distributed with this source distribution. | ||
* | ||
* 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. | ||
*/ | ||
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// Disable symbol overrides so that we can use system headers. | ||
#define FORBIDDEN_SYMBOL_ALLOW_ALL | ||
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#include "common/scummsys.h" | ||
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#if defined(USE_SNDIO) | ||
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#include "common/error.h" | ||
#include "common/textconsole.h" | ||
#include "common/util.h" | ||
#include "audio/musicplugin.h" | ||
#include "audio/mpu401.h" | ||
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#include <sndio.h> | ||
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//////////////////////////////////////// | ||
// | ||
// sndio MIDI driver | ||
// | ||
//////////////////////////////////////// | ||
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class MidiDriver_Sndio : public MidiDriver_MPU401 { | ||
public: | ||
MidiDriver_Sndio(); | ||
int open(); | ||
bool isOpen() const { return hdl != NULL; } | ||
void close(); | ||
void send(uint32 b); | ||
void sysEx(const byte *msg, uint16 length); | ||
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private: | ||
struct mio_hdl *hdl; | ||
}; | ||
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MidiDriver_Sndio::MidiDriver_Sndio() { | ||
hdl = NULL; | ||
} | ||
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int MidiDriver_Sndio::open() { | ||
if (hdl != NULL) | ||
return MERR_ALREADY_OPEN; | ||
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hdl = ::mio_open(NULL, MIO_OUT, 0); | ||
if (hdl == NULL) | ||
warning("Could open MIDI port (no music)"); | ||
return 0; | ||
} | ||
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void MidiDriver_Sndio::close() { | ||
MidiDriver_MPU401::close(); | ||
if (!hdl) | ||
return; | ||
mio_close(hdl); | ||
hdl = NULL; | ||
} | ||
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void MidiDriver_Sndio::send(uint32 b) { | ||
unsigned char buf[4]; | ||
unsigned int len; | ||
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if (!hdl) | ||
return; | ||
buf[0] = b & 0xff; | ||
buf[1] = (b >> 8) & 0xff; | ||
buf[2] = (b >> 16) & 0xff; | ||
buf[3] = (b >> 24) & 0xff; | ||
switch (buf[0] & 0xf0) { | ||
case 0xf0: | ||
return; | ||
case 0xc0: | ||
case 0xd0: | ||
len = 2; | ||
break; | ||
default: | ||
len = 3; | ||
} | ||
mio_write(hdl, buf, len); | ||
} | ||
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void MidiDriver_Sndio::sysEx(const byte *msg, uint16 length) { | ||
if (!hdl) | ||
return; | ||
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unsigned char buf[266]; | ||
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assert(length + 2 <= ARRAYSIZE(buf)); | ||
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// Add SysEx frame | ||
buf[0] = 0xF0; | ||
memcpy(buf + 1, msg, length); | ||
buf[length + 1] = 0xF7; | ||
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mio_write(hdl, buf, length + 2); | ||
} | ||
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// Plugin interface | ||
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class SndioMusicPlugin : public MusicPluginObject { | ||
public: | ||
const char *getName() const { | ||
return "Sndio"; | ||
} | ||
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const char *getId() const { | ||
return "sndio"; | ||
} | ||
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MusicDevices getDevices() const; | ||
Common::Error createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle = 0) const; | ||
}; | ||
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MusicDevices SndioMusicPlugin::getDevices() const { | ||
MusicDevices devices; | ||
devices.push_back(MusicDevice(this, "", MT_GM)); | ||
return devices; | ||
} | ||
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Common::Error SndioMusicPlugin::createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle) const { | ||
*mididriver = new MidiDriver_Sndio(); | ||
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return Common::kNoError; | ||
} | ||
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//#if PLUGIN_ENABLED_DYNAMIC(Sndio) | ||
//REGISTER_PLUGIN_DYNAMIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin); | ||
//#else | ||
REGISTER_PLUGIN_STATIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin); | ||
//#endif | ||
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#endif |
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