mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 04:34:50 +00:00
3290d618d6
PCjr support. Rewrote the generator, so I can reuse more code between PCjr and speaker output. Added function to set master volume and to switch between PCjr and speaker. svn-id: r8185
125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/* 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.
|
|
*
|
|
* $Header$
|
|
*
|
|
*/
|
|
|
|
#ifndef PLAYER_V2_H
|
|
#define PLAYER_V2_H
|
|
|
|
#include "common/scummsys.h"
|
|
#include "sound/mixer.h"
|
|
|
|
struct channel_data {
|
|
uint16 time_left; // 00
|
|
uint16 next_cmd; // 02
|
|
uint16 base_freq; // 04
|
|
uint16 freq_delta; // 06
|
|
uint16 freq; // 08
|
|
uint16 volume; // 10
|
|
uint16 volume_delta; // 12
|
|
uint16 tempo; // 14
|
|
uint16 inter_note_pause; // 16
|
|
uint16 transpose; // 18
|
|
uint16 note_length; // 20
|
|
uint16 hull_curve; // 22
|
|
uint16 hull_offset; // 24
|
|
uint16 hull_counter; // 26
|
|
uint16 freqmod_table; // 28
|
|
uint16 freqmod_offset; // 30
|
|
uint16 freqmod_incr; // 32
|
|
uint16 freqmod_multiplier; // 34
|
|
uint16 freqmod_modulo; // 36
|
|
uint16 unknown[5]; // 38 - 46
|
|
uint16 music_script_nr; // 48
|
|
} GCC_PACK;
|
|
|
|
union ChannelInfo {
|
|
channel_data d;
|
|
uint16 array[sizeof(channel_data)/2];
|
|
};
|
|
|
|
|
|
|
|
class Player_V2 {
|
|
public:
|
|
Player_V2();
|
|
~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);
|
|
|
|
private:
|
|
SoundMixer *_mixer;
|
|
|
|
|
|
bool _pcjr;
|
|
|
|
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 _timer_count[4];
|
|
int _timer_output;
|
|
|
|
const uint16 *_freqs_table;
|
|
|
|
ChannelInfo channels[4];
|
|
|
|
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
|