1 files changed, 126 insertions, 0 deletions
diff --git a/engines/gob/sound/bgatmosphere.cpp b/engines/gob/sound/bgatmosphere.cpp
new file mode 100644
index 0000000000..3c61f4f76a
--- /dev/null
+++ b/engines/gob/sound/bgatmosphere.cpp
@@ -0,0 +1,126 @@
+/* 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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/system.h"
+#include "common/events.h"
+
+#include "gob/sound/bgatmosphere.h"
+
+namespace Gob {
+
+BackgroundAtmosphere::BackgroundAtmosphere(Audio::Mixer &mixer) : SoundMixer(mixer) {
+	_playMode = kPlayModeLinear;
+	_queuePos = -1;
+	_shaded = false;
+
+	g_system->getEventManager()->registerRandomSource(_rnd, "gobBA");
+}
+
+BackgroundAtmosphere::~BackgroundAtmosphere() {
+	queueClear();
+}
+
+void BackgroundAtmosphere::play() {
+	Common::StackLock slock(_mutex);
+
+	_queuePos = -1;
+	getNextQueuePos();
+
+	if (_queuePos == -1)
+		return;
+
+	SoundMixer::play(*_queue[_queuePos], 1, 0);
+}
+
+void BackgroundAtmosphere::stop() {
+	SoundMixer::stop(0);
+}
+
+void BackgroundAtmosphere::setPlayMode(PlayMode mode) {
+	_playMode = mode;
+}
+
+void BackgroundAtmosphere::queueSample(SoundDesc &sndDesc) {
+	Common::StackLock slock(_mutex);
+
+	_queue.push_back(&sndDesc);
+}
+
+void BackgroundAtmosphere::queueClear() {
+	Common::StackLock slock(_mutex);
+
+	SoundMixer::stop(0);
+	for (uint i = 0; i < _queue.size(); i++)
+		delete _queue[i];
+
+	_queue.clear();
+	_queuePos = -1;
+}
+
+void BackgroundAtmosphere::checkEndSample() {
+	Common::StackLock slock(_mutex);
+
+	getNextQueuePos();
+
+	if (_queuePos == -1) {
+		_end = true;
+		_playingSound = 0;
+	} else {
+		SoundMixer::setSample(*_queue[_queuePos], 1, 0, 0);
+		if (_shaded)
+			_fadeVol = 20000;
+	}
+}
+
+void BackgroundAtmosphere::getNextQueuePos() {
+	if (_queue.size() == 0) {
+		_queuePos = -1;
+		return;
+	}
+
+	switch (_playMode) {
+
+	case kPlayModeLinear:
+		_queuePos = (_queuePos + 1) % _queue.size();
+		break;
+
+	case kPlayModeRandom:
+		_queuePos = _rnd.getRandomNumber(_queue.size() - 1);
+		break;
+
+	}
+}
+
+void BackgroundAtmosphere::shade() {
+	_shaded = true;
+	_fadeVol = 32768;
+}
+
+void BackgroundAtmosphere::unshade() {
+	_shaded = false;
+	_fadeVol = 65536;
+}
+
+} // End of namespace Gob