/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2003 The ScummVM project
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/player_v2.h,v 2.4 2003/06/06 21:56:37 hoenicke Exp $
 *
 */

#ifndef PLAYER_V2_H
#define PLAYER_V2_H

#include "common/scummsys.h"
#include "sound/mixer.h"
class Scumm;

class Player_V2 {
public:
	Player_V2(Scumm *scumm);
	~Player_V2();

	void set_pcjr(bool pcjr);
	void set_master_volume(int vol);

	void startSound(int nr, byte *data);
	void stopSound(int nr);
	void stopAllSounds();
	int  getSoundStatus(int nr);
	int  getMusicTimer();

private:
	SoundMixer *_mixer;
	Scumm *_scumm;


	bool _pcjr;
	int _header_len;

	int _sample_rate;
	int _next_tick;
	int _tick_len;
	unsigned int _update_step;
	unsigned int _decay;
	unsigned int _level;
	unsigned int _RNG;
	unsigned int _volumetable[16];

	int _music_timer;
	int _music_timer_ctr;
	int _ticks_per_music_timer;
	int _timer_count[4];
	int _timer_output;
	int _tick_172;

	struct ChannelInfo *channels;
	struct ModifierInfo *modinfos;
	byte _adlib_reg_cache[256];

	int   current_nr;
	byte *current_data;
	int   next_nr;
	byte *next_data;
	byte *retaddr;

	OSystem *_system;
	void *_mutex;
	void mutex_up() { _system->lock_mutex (_mutex); }
	void mutex_down() { _system->unlock_mutex (_mutex); }

	void restartSound();
	void execute_cmd(ChannelInfo *channel);
	void next_freqs(ChannelInfo *channel);
	void clear_channel(int i);
	void chainSound(int nr, byte *data);
	void chainNextSound();

	static void premix_proc(void *param, int16 *buf, uint len);
	void do_mix (int16 *buf, int len);

	void lowPassFilter(int16 *data, int len);
	void squareGenerator(int channel, int freq, int vol,
	                     int noiseFeedback, int16 *sample, int len);
	void generateSpkSamples(int16 *data, int len);
	void generatePCjrSamples(int16 *data, int len);
    
};

#endif