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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 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.
*
*/
/*
* This code is based on original Mortville Manor DOS source code
* Copyright (c) 1987-1989 Lankhor
*/
#ifndef MORTEVIELLE_SOUND_H
#define MORTEVIELLE_SOUND_H
#include "audio/audiostream.h"
#include "audio/mixer.h"
#include "common/mutex.h"
#include "common/queue.h"
namespace Mortevielle {
typedef int tablint[256];
/**
* Structure used to store pending notes to play
*/
struct SpeakerNote {
int freq;
uint32 length;
SpeakerNote(int noteFreq, uint32 noteLength) {
freq = noteFreq;
length = noteLength;
}
};
/**
* This is a modified PC Speaker class that allows the queueing of an entire song
* sequence one note at a time.
*/
class PCSpeaker : public Audio::AudioStream {
private:
Common::Queue<SpeakerNote> _pendingNotes;
Common::Mutex _mutex;
int _rate;
uint32 _oscLength;
uint32 _oscSamples;
uint32 _remainingSamples;
uint32 _mixedSamples;
byte _volume;
void dequeueNote();
protected:
static int8 generateSquare(uint32 x, uint32 oscLength);
public:
PCSpeaker(int rate = 44100);
~PCSpeaker();
/** Play a note for length microseconds.
*/
void play(int freq, uint32 length);
/** Stop the currently playing sequence */
void stop();
/** Adjust the volume. */
void setVolume(byte volume);
bool isPlaying() const;
int readBuffer(int16 *buffer, const int numSamples);
bool isStereo() const { return false; }
bool endOfData() const { return false; }
bool endOfStream() const { return false; }
int getRate() const { return _rate; }
};
class SoundManager {
private:
Audio::Mixer *_mixer;
PCSpeaker *_speakerStream;
Audio::SoundHandle _speakerHandle;
public:
SoundManager(Audio::Mixer *mixer);
~SoundManager();
void playNote(int frequency, int32 length);
void decodeMusic(const byte *PSrc, byte *PDest, int NbreSeg);
void litph(tablint &t, int typ, int tempo);
void musyc(tablint &tb, int nbseg, int att);
};
} // End of namespace Mortevielle
#endif
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