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MIDI: add sndio midi backend

New sndio MIDI backend for OpenBSD written by Alexandre Ratchov.
Tested with an external MT-32 and fluidsynth.
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1 parent ec7dfed commit 8cfe25cd658ddbbb811ff2b9fce7e46ea6bc855a @jonathangray jonathangray committed May 14, 2012
Showing with 190 additions and 0 deletions.
  1. +152 −0 backends/midi/sndio.cpp
  2. +1 −0 backends/module.mk
  3. +3 −0 base/plugins.cpp
  4. +4 −0 base/version.cpp
  5. +30 −0 configure
@@ -0,0 +1,152 @@
+/* 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.
+ */
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "common/scummsys.h"
+
+#if defined(USE_SNDIO)
+
+#include "common/error.h"
+#include "common/textconsole.h"
+#include "common/util.h"
+#include "audio/musicplugin.h"
+#include "audio/mpu401.h"
+
+#include <sndio.h>
+
+////////////////////////////////////////
+//
+// sndio MIDI driver
+//
+////////////////////////////////////////
+
+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);
+
+private:
+ struct mio_hdl *hdl;
+};
+
+MidiDriver_Sndio::MidiDriver_Sndio() {
+ hdl = NULL;
+}
+
+int MidiDriver_Sndio::open() {
+ if (hdl != NULL)
+ return MERR_ALREADY_OPEN;
+
+ hdl = ::mio_open(NULL, MIO_OUT, 0);
+ if (hdl == NULL)
+ warning("Could open MIDI port (no music)");
+ return 0;
+}
+
+void MidiDriver_Sndio::close() {
+ MidiDriver_MPU401::close();
+ if (!hdl)
+ return;
+ mio_close(hdl);
+ hdl = NULL;
+}
+
+void MidiDriver_Sndio::send(uint32 b) {
+ unsigned char buf[4];
+ unsigned int len;
+
+ 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);
+}
+
+void MidiDriver_Sndio::sysEx(const byte *msg, uint16 length) {
+ if (!hdl)
+ return;
+
+ unsigned char buf[266];
+
+ assert(length + 2 <= ARRAYSIZE(buf));
+
+ // Add SysEx frame
+ buf[0] = 0xF0;
+ memcpy(buf + 1, msg, length);
+ buf[length + 1] = 0xF7;
+
+ mio_write(hdl, buf, length + 2);
+}
+
+
+// Plugin interface
+
+class SndioMusicPlugin : public MusicPluginObject {
+public:
+ const char *getName() const {
+ return "Sndio";
+ }
+
+ const char *getId() const {
+ return "sndio";
+ }
+
+ MusicDevices getDevices() const;
+ Common::Error createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle = 0) const;
+};
+
+MusicDevices SndioMusicPlugin::getDevices() const {
+ MusicDevices devices;
+ devices.push_back(MusicDevice(this, "", MT_GM));
+ return devices;
+}
+
+Common::Error SndioMusicPlugin::createInstance(MidiDriver **mididriver, MidiDriver::DeviceHandle) const {
+ *mididriver = new MidiDriver_Sndio();
+
+ return Common::kNoError;
+}
+
+//#if PLUGIN_ENABLED_DYNAMIC(Sndio)
+ //REGISTER_PLUGIN_DYNAMIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin);
+//#else
+ REGISTER_PLUGIN_STATIC(SNDIO, PLUGIN_TYPE_MUSIC, SndioMusicPlugin);
+//#endif
+
+#endif
View
@@ -11,6 +11,7 @@ MODULE_OBJS := \
midi/alsa.o \
midi/dmedia.o \
midi/seq.o \
+ midi/sndio.o \
midi/stmidi.o \
midi/timidity.o \
saves/savefile.o \
View
@@ -101,6 +101,9 @@ class StaticPluginProvider : public PluginProvider {
#if defined(USE_SEQ_MIDI)
LINK_PLUGIN(SEQ)
#endif
+ #if defined(USE_SNDIO)
+ LINK_PLUGIN(SNDIO)
+ #endif
#if defined(__MINT__)
LINK_PLUGIN(STMIDI)
#endif
View
@@ -94,6 +94,10 @@ const char *gScummVMFeatures = ""
"SEQ "
#endif
+#ifdef USE_SNDIO
+ "sndio "
+#endif
+
#ifdef USE_TIMIDITY
"TiMidity "
#endif
View
@@ -93,6 +93,7 @@ _flac=auto
_mad=auto
_alsa=auto
_seq_midi=auto
+_sndio=auto
_timidity=auto
_zlib=auto
_sparkle=auto
@@ -852,6 +853,9 @@ Optional Libraries:
--with-libunity-prefix=DIR Prefix where libunity is installed (optional)
--disable-libunity disable Unity launcher integration [autodetect]
+ --with-sndio-prefix=DIR Prefix where sndio is installed (optional)
+ --disable-sndio disable sndio MIDI driver [autodetect]
+
Some influential environment variables:
LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
nonstandard directory <lib dir>
@@ -877,6 +881,8 @@ for ac_option in $@; do
--disable-alsa) _alsa=no ;;
--enable-seq-midi) _seq_midi=yes ;;
--disable-seq-midi) _seq_midi=no ;;
+ --enable-sndio) _sndio=yes ;;
+ --disable-sndio) _sndio=no ;;
--enable-timidity) _timidity=yes ;;
--disable-timidity) _timidity=no ;;
--enable-vorbis) _vorbis=yes ;;
@@ -937,6 +943,11 @@ for ac_option in $@; do
ALSA_CFLAGS="-I$arg/include"
ALSA_LIBS="-L$arg/lib"
;;
+ --with-sndio-prefix=*)
+ arg=`echo $ac_option | cut -d '=' -f 2`
+ SNDIO_CFLAGS="-I$arg/include"
+ SNDIO_LIBS="-L$arg/lib"
+ ;;
--with-ogg-prefix=*)
arg=`echo $ac_option | cut -d '=' -f 2`
OGG_CFLAGS="-I$arg/include"
@@ -3258,6 +3269,25 @@ define_in_config_h_if_yes "$_seq_midi" 'USE_SEQ_MIDI'
echo "$_seq_midi"
#
+# Check for sndio
+#
+echocheck "sndio"
+if test "$_sndio" = auto ; then
+ _sndio=no
+ cat > $TMPC << EOF
+#include <sndio.h>
+int main(void) { struct sio_par par; sio_initpar(&par); return 0; }
+EOF
+ cc_check $SNDIO_CFLAGS $SNDIO_LIBS -lsndio && _sndio=yes
+fi
+if test "$_sndio" = yes ; then
+ LIBS="$LIBS $SNDIO_LIBS -lsndio"
+ INCLUDES="$INCLUDES $SNDIO_CFLAGS"
+fi
+define_in_config_h_if_yes "$_sndio" 'USE_SNDIO'
+echo "$_sndio"
+
+#
# Check for TiMidity(++)
#
echocheck "TiMidity"

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