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engines/icb/sound/music_manager.h

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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) 1999-2000 Revolution Software Ltd.
+ * This code is based on source code created by Revolution Software,
+ * used with permission.
+ *
+ * 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/>.
+ *
+ */
+
+#ifndef ICB_MUSICMANAGER_H_INCLUDED_
+#define ICB_MUSICMANAGER_H_INCLUDED_
+
+#include "engines/icb/common/px_common.h"
+#include "engines/icb/sound/direct_sound.h"
+
+#include "common/stream.h"
+
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
+
+namespace ICB {
+
+class MusicManager {
+private:
+	Audio::AudioStream *_audioStream;
+	Audio::SoundHandle _handle;
+
+	uint32 m_bufferLength; // Stores the length of the sound buffers in bytes
+	int32 m_musicVol;        // The volume the each stream was started at
+
+	uint32 m_wavByteOffsetInCluster;
+	uint32 m_wavDataSize;
+
+	bool8 m_paused;
+	int32 m_lengthInCycles; // Assumes 12 frames per second
+
+	int32 m_fading;
+	int32 m_adjustFadeVol;
+
+	uint32 m_identifier; // Handle if you like of loaded music
+
+public:
+	MusicManager();
+	~MusicManager();
+
+	bool8 UpdateMusic();
+
+	bool8 LoadMusic(const char *clusterName, uint32 byteOffsetToWav, int32 vol = 128);
+	bool8 StartMusic(const char *clusterName, uint32 byteOffsetToWav, int32 vol = 128);
+	bool8 PlayMusic();
+	void StopMusic();
+	void SetMusicPausedStatus(bool8 p = TRUE8);
+	void SetMusicVolume(int32 volume);
+
+	bool8 IsPlaying();
+	bool8 IsPaused() { return m_paused; }
+	int32 GetLength() { return m_lengthInCycles; }
+
+private:
+	bool8 OpenMusic(Common::SeekableReadStream *stream);
+	void KillBuffer();
+	void SetVolume(int32 volume);
+	void AdjustVolume(int32 amount);
+};
+
+extern MusicManager *g_theMusicManager;
+
+} // End of namespace ICB
+
+#endif