music_manager.h

/* 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