Initial commit

engines/pegasus/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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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/aiff.h"
+#include "audio/decoders/quicktime.h"
+#include "common/file.h"
+#include "common/system.h"
+
+#include "pegasus/fader.h"
+#include "pegasus/sound.h"
+
+namespace Pegasus {
+
+Sound::Sound() {
+	_stream = nullptr;
+	_volume = 0xFF;
+	_fader = nullptr;
+}
+
+Sound::~Sound() {
+	disposeSound();
+}
+
+void Sound::disposeSound() {
+	stopSound();
+	delete _stream; _stream = nullptr;
+}
+
+void Sound::initFromAIFFFile(const Common::Path &fileName) {
+	disposeSound();
+
+	Common::File *file = new Common::File();
+	if (!file->open(fileName)) {
+		warning("Failed to open AIFF file '%s'", fileName.toString().c_str());
+		delete file;
+		return;
+	}
+
+	Audio::RewindableAudioStream *stream = Audio::makeAIFFStream(file, DisposeAfterUse::YES);
+
+	_stream = dynamic_cast<Audio::SeekableAudioStream *>(stream);
+
+	if (!_stream) {
+		delete stream;
+		warning("AIFF stream '%s' is not seekable", fileName.toString().c_str());
+		return;
+	}
+}
+
+void Sound::initFromQuickTime(const Common::Path &fileName) {
+	disposeSound();
+
+	_stream = Audio::makeQuickTimeStream(fileName);
+
+	if (!_stream)
+		warning("Failed to open QuickTime file '%s'", fileName.toString().c_str());
+}
+
+void Sound::attachFader(SoundFader *fader) {
+	if (_fader)
+		_fader->attachSound(nullptr);
+
+	_fader = fader;
+
+	if (_fader)
+		_fader->attachSound(this);
+}
+
+void Sound::playSound() {
+	if (!isSoundLoaded())
+		return;
+
+	stopSound();
+
+	// Make sure the sound is back at the beginning before we play it
+	_stream->rewind();
+
+	if (_fader)
+		setVolume(_fader->getFaderValue());
+
+	g_system->getMixer()->playStream(Audio::Mixer::kPlainSoundType, &_handle, _stream, -1, _volume, 0, DisposeAfterUse::NO);
+}
+
+void Sound::loopSound() {
+	if (!isSoundLoaded())
+		return;
+
+	stopSound();
+
+	// Create a looping stream
+	Audio::AudioStream *loopStream = new Audio::LoopingAudioStream(_stream, 0, DisposeAfterUse::NO);
+
+	// Assume that if there is a fader, we're going to fade the sound in.
+	if (_fader)
+		setVolume(0);
+
+	g_system->getMixer()->playStream(Audio::Mixer::kPlainSoundType, &_handle, loopStream, -1, _volume, 0, DisposeAfterUse::YES);
+}
+
+void Sound::playSoundSegment(uint32 start, uint32 end) {
+	if (!isSoundLoaded())
+		return;
+
+	stopSound();
+
+	Audio::AudioStream *subStream = new Audio::SubSeekableAudioStream(_stream, Audio::Timestamp(0, start, 600), Audio::Timestamp(0, end, 600), DisposeAfterUse::NO);
+
+	g_system->getMixer()->playStream(Audio::Mixer::kPlainSoundType, &_handle, subStream, -1, _volume, 0, DisposeAfterUse::YES);
+}
+
+void Sound::stopSound() {
+	g_system->getMixer()->stopHandle(_handle);
+}
+
+void Sound::setVolume(const uint16 volume) {
+	// Clipping the volume to [0x00, 0xFF] instead of Apple's [0, 0x100]
+	// We store the volume in case SetVolume is called before the sound starts
+
+	_volume = (volume == 0x100) ? 0xFF : volume;
+	g_system->getMixer()->setChannelVolume(_handle, _volume);
+}
+
+bool Sound::isPlaying() {
+	return isSoundLoaded() && g_system->getMixer()->isSoundHandleActive(_handle);
+}
+
+bool Sound::isSoundLoaded() const {
+	return _stream != nullptr;
+}
+
+SoundTimeBase::SoundTimeBase() {
+	setScale(600);
+	_startScale = 600;
+	_stopScale = 600;
+	_setToStart = false;
+}
+
+void SoundTimeBase::playSoundSegment(uint32 startTime, uint32 endTime) {
+	_startTime = startTime;
+	_stopTime = endTime;
+	_setToStart = true;
+	_time = Common::Rational(startTime, getScale());
+	setRate(1);
+	Sound::playSoundSegment(startTime, endTime);
+}
+
+void SoundTimeBase::updateTime() {
+	if (_setToStart) {
+		if (isPlaying()) {
+			// Not at the end, let's get the time
+			uint numFrames = g_system->getMixer()->getSoundElapsedTime(_handle) * 600 / 1000;
+
+			// WORKAROUND: Our mixer is woefully inaccurate and quite often returns
+			// times that exceed the actual length of the clip. We'll just fake times
+			// that are under the final time to ensure any trigger for the end time is
+			// only sent when the sound has actually stopped.
+			if (numFrames >= (_stopTime - _startTime))
+				numFrames = _stopTime - _startTime - 1;
+
+			_time = Common::Rational(_startTime + numFrames, getScale());
+		} else {
+			// Assume we reached the end
+			_setToStart = false;
+			_time = Common::Rational(_stopTime, getScale());
+		}
+	}
+}
+
+} // End of namespace Pegasus