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engines/petka/sound.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "audio/audiostream.h"
+#include "audio/decoders/wave.h"
+
+#include "common/substream.h"
+#include "common/system.h"
+#include "common/debug.h"
+
+#include "petka/petka.h"
+#include "petka/sound.h"
+
+namespace Petka {
+
+Sound::Sound(Common::SeekableReadStream *stream, Audio::Mixer::SoundType type)
+	: _type(type), _stream(stream->readStream(stream->size())) {
+	delete stream;
+}
+
+Sound::~Sound() {
+	stop();
+}
+
+void Sound::play(bool isLoop) {
+	if (!_stream)
+		return;
+	stop();
+
+	Audio::AudioStream *audioStream;
+	Audio::SeekableAudioStream *wavStream = Audio::makeWAVStream(_stream.get(), DisposeAfterUse::NO);
+	if (isLoop)
+		audioStream = Audio::makeLoopingAudioStream(wavStream, 0, 0, 0);
+	else
+		audioStream = wavStream;
+
+	g_system->getMixer()->playStream(_type, &_handle , audioStream);
+}
+
+bool Sound::isPlaying() {
+	return g_system->getMixer()->isSoundHandleActive(_handle);
+}
+
+void Sound::stop() {
+	g_system->getMixer()->stopHandle(_handle);
+	_stream->seek(0, SEEK_SET);
+}
+
+void Sound::setBalance(uint16 x, uint16 width) {
+	// original scales from -12.5 db to 12.5 db
+	g_system->getMixer()->setChannelBalance(_handle, (int8)(255 * (2 * x - width) / (2 * width)));
+}
+
+Audio::Mixer::SoundType Sound::type() {
+	return _type;
+}
+
+void Sound::pause(bool p) {
+	g_system->getMixer()->pauseHandle(_handle, p);
+}
+
+
+Sound *SoundMgr::addSound(const Common::String &name, Audio::Mixer::SoundType type) {
+	Sound *sound = findSound(name);
+	if (sound)
+		return sound;
+	Common::SeekableReadStream *s = _vm.openFile(name, false);
+	if (s) {
+		debug("SoundMgr: added sound %s", name.c_str());
+		sound = new Sound(s, type);
+		_sounds.getOrCreateVal(name).reset(sound);
+	}
+	return sound;
+}
+
+Sound *SoundMgr::findSound(const Common::String &name) const {
+	SoundsMap::iterator it = _sounds.find(name);
+	return it != _sounds.end() ? it->_value.get() : nullptr;
+}
+
+void SoundMgr::removeSound(const Common::String &name) {
+	debug("SoundMgr::removeSound %s", name.c_str());
+ 	_sounds.erase(name);
+}
+
+void SoundMgr::removeAll() {
+	debug("SoundMgr::removeAll");
+	_sounds.clear(false);
+}
+
+void SoundMgr::removeSoundsWithType(Audio::Mixer::SoundType type) {
+	SoundsMap::iterator it;
+	for (it = _sounds.begin(); it != _sounds.end(); ++it) {
+		Sound *s = it->_value.get();
+		if (s->type() == type) {
+			_sounds.erase(it); // it is safe to inc iterator after erasing in our hashmap impl
+		}
+	}
+}
+
+} // End of namespace Petka