1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 // Disable symbol overrides so that we can use system headers.
24 #define FORBIDDEN_SYMBOL_ALLOW_ALL
25
26 #include "common/scummsys.h"
27
28 #if defined(USE_SNDIO)
29
30 #include "common/error.h"
31 #include "common/textconsole.h"
32 #include "common/util.h"
33 #include "audio/musicplugin.h"
34 #include "audio/mpu401.h"
35
36 #include <sndio.h>
37
38 ////////////////////////////////////////
39 //
40 // sndio MIDI driver
41 //
42 ////////////////////////////////////////
43
44 class MidiDriver_Sndio : public MidiDriver_MPU401 {
45 public:
46 MidiDriver_Sndio();
47 int open();
isOpen() const48 bool isOpen() const { return hdl != NULL; }
49 void close();
50 void send(uint32 b);
51 void sysEx(const byte *msg, uint16 length);
52
53 private:
54 struct mio_hdl *hdl;
55 };
56
MidiDriver_Sndio()57 MidiDriver_Sndio::MidiDriver_Sndio() {
58 hdl = NULL;
59 }
60
open()61 int MidiDriver_Sndio::open() {
62 if (hdl != NULL)
63 return MERR_ALREADY_OPEN;
64
65 hdl = ::mio_open(NULL, MIO_OUT, 0);
66 if (hdl == NULL)
67 warning("Could open MIDI port (no music)");
68 return 0;
69 }
70
close()71 void MidiDriver_Sndio::close() {
72 MidiDriver_MPU401::close();
73 if (!hdl)
74 return;
75 mio_close(hdl);
76 hdl = NULL;
77 }
78
send(uint32 b)79 void MidiDriver_Sndio::send(uint32 b) {
80 unsigned char buf[4];
81 unsigned int len;
82
83 if (!hdl)
84 return;
85 buf[0] = b & 0xff;
86 buf[1] = (b >> 8) & 0xff;
87 buf[2] = (b >> 16) & 0xff;
88 buf[3] = (b >> 24) & 0xff;
89 switch (buf[0] & 0xf0) {
90 case 0xf0:
91 return;
92 case 0xc0:
93 case 0xd0:
94 len = 2;
95 break;
96 default:
97 len = 3;
98 }
99 mio_write(hdl, buf, len);
100 }
101
sysEx(const byte * msg,uint16 length)102 void MidiDriver_Sndio::sysEx(const byte *msg, uint16 length) {
103 if (!hdl)
104 return;
105
106 unsigned char buf[266];
107
108 assert(length + 2 <= ARRAYSIZE(buf));
109
110 // Add SysEx frame
111 buf[0] = 0xF0;
112 memcpy(buf + 1, msg, length);
113 buf[length + 1] = 0xF7;
114
115 mio_write(hdl, buf, length + 2);
116 }
117
118
119 // Plugin interface
120
121 class SndioMusicPlugin : public MusicPluginObject {
122 public:
getName() const123 const char *getName() const {
124 return "Sndio";
125 }
126
getId() const127 const char *getId() const {
128 return "sndio";
129 }
130
131 MusicDevices getDevices() const;
132 Common::Error createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle = 0) const;
133 };
134
getDevices() const135 MusicDevices SndioMusicPlugin::getDevices() const {
136 MusicDevices devices;
137 devices.push_back(MusicDevice(this, "", MT_GM));
138 return devices;
139 }
140
createInstance(MidiDriver ** mididriver,MidiDriver::DeviceHandle) const141 Common::Error SndioMusicPlugin::createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle) const {
142 *mididriver = new MidiDriver_Sndio();
143
144 return Common::kNoError;
145 }
146
147 //#if PLUGIN_ENABLED_DYNAMIC(Sndio)
148 //REGISTER_PLUGIN_DYNAMIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin);
149 //#else
150 REGISTER_PLUGIN_STATIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin);
151 //#endif
152
153 #endif
154