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112 lines
2.8 KiB
C++
112 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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/*
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* This code is based on original Mortville Manor DOS source code
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* Copyright (c) 1988-1989 Lankhor
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*/
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#ifndef MORTEVIELLE_SOUND_H
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#define MORTEVIELLE_SOUND_H
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#include "audio/audiostream.h"
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#include "audio/mixer.h"
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#include "common/mutex.h"
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#include "common/queue.h"
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#include "mortevielle/var_mor.h"
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namespace Mortevielle {
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/**
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* Structure used to store pending notes to play
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*/
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struct SpeakerNote {
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int freq;
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uint32 length;
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SpeakerNote(int noteFreq, uint32 noteLength) {
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freq = noteFreq;
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length = noteLength;
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}
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};
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/**
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* This is a modified PC Speaker class that allows the queueing of an entire song
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* sequence one note at a time.
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*/
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class PCSpeaker : public Audio::AudioStream {
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private:
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Common::Queue<SpeakerNote> _pendingNotes;
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Common::Mutex _mutex;
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int _rate;
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uint32 _oscLength;
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uint32 _oscSamples;
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uint32 _remainingSamples;
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uint32 _mixedSamples;
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byte _volume;
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void dequeueNote();
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protected:
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static int8 generateSquare(uint32 x, uint32 oscLength);
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public:
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PCSpeaker(int rate = 44100);
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~PCSpeaker();
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/** Play a note for length microseconds.
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*/
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void play(int freq, uint32 length);
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/** Stop the currently playing sequence */
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void stop();
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/** Adjust the volume. */
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void setVolume(byte volume);
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bool isPlaying() const;
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int readBuffer(int16 *buffer, const int numSamples);
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bool isStereo() const { return false; }
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bool endOfData() const { return false; }
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bool endOfStream() const { return false; }
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int getRate() const { return _rate; }
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};
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class SoundManager {
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private:
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Audio::Mixer *_mixer;
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PCSpeaker *_speakerStream;
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Audio::SoundHandle _speakerHandle;
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public:
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SoundManager(Audio::Mixer *mixer);
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~SoundManager();
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void playNote(int frequency, int32 length);
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void decodeMusic(const byte *PSrc, byte *PDest, int NbreSeg);
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void litph(tablint &t, int typ, int tempo);
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void musyc(tablint &tb, int nbseg, int att);
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};
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} // End of namespace Mortevielle
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#endif
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