GNAP: Add music when game is paused

1 files changed, 108 insertions, 0 deletions

diff --git a/engines/gnap/music.cpp b/engines/gnap/music.cpp
new file mode 100644
index 0000000000..b42f6e9b91
--- /dev/null
+++ b/engines/gnap/music.cpp
@@ -0,0 +1,108 @@
+/* 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.
+ *
+ */
+
+// MIDI and digital music class
+
+#include "audio/mididrv.h"
+#include "audio/midiparser.h"
+#include "common/debug.h"
+#include "common/file.h"
+
+#include "gnap/music.h"
+#include "gnap/gnap.h"
+
+namespace Gnap {
+
+MusicPlayer::MusicPlayer(const char *filename) : _filename(filename) {
+
+	MidiPlayer::createDriver();
+
+	int ret = _driver->open();
+	if (ret == 0) {
+		if (_nativeMT32)
+			_driver->sendMT32Reset();
+		else
+			_driver->sendGMReset();
+
+		// TODO: Load cmf.ins with the instrument table.  It seems that an
+		// interface for such an operation is supported for AdLib.  Maybe for
+		// this card, setting instruments is necessary.
+
+		_driver->setTimerCallback(this, &timerCallback);
+	}
+}
+
+void MusicPlayer::sendToChannel(byte channel, uint32 b) {
+	if (!_channelsTable[channel]) {
+		_channelsTable[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
+		// If a new channel is allocated during the playback, make sure
+		// its volume is correctly initialized.
+		if (_channelsTable[channel])
+			_channelsTable[channel]->volume(_channelsVolume[channel] * _masterVolume / 255);
+	}
+
+	if (_channelsTable[channel])
+		_channelsTable[channel]->send(b);
+}
+
+void MusicPlayer::playSMF(bool loop) {
+	Common::StackLock lock(_mutex);
+
+	stop();
+
+	// Load MIDI resource data
+	Common::File musicFile;
+	musicFile.open(_filename);
+	if (!musicFile.isOpen()) {
+		debugC(2, kDebugMusic, "Cannot open music file %s", _filename);
+		return;
+	}
+	int midiMusicSize = musicFile.size();
+	free(_midiData);
+	_midiData = (byte *)malloc(midiMusicSize);
+	musicFile.read(_midiData, midiMusicSize);
+	musicFile.close();
+
+	MidiParser *parser = MidiParser::createParser_SMF();
+	if (parser->loadMusic(_midiData, midiMusicSize)) {
+		parser->setTrack(0);
+		parser->setMidiDriver(this);
+		parser->setTimerRate(_driver->getBaseTempo());
+		parser->property(MidiParser::mpCenterPitchWheelOnUnload, 1);
+
+		_parser = parser;
+
+		syncVolume();
+
+		_isLooping = loop;
+		_isPlaying = true;
+	} else {
+		debugC(2, kDebugMusic, "Cannot play music file %s", _filename);
+		delete parser;
+	}
+}
+
+void MusicPlayer::stop() {
+	Audio::MidiPlayer::stop();
+}
+
+} // End of namespace Gnap