mirror of
https://github.com/ZDoom/qzdoom.git
synced 2024-11-28 06:53:58 +00:00
- It seems I forgot to add this stuff to the repository.
SVN r3947 (trunk)
This commit is contained in:
Randy Heit
parent
3ec387ac32
commit
064ef07b76
2 changed files with 1684 additions and 0 deletions
1453
src/oplsynth/dosbox/opl.cpp
Normal file
1453
src/oplsynth/dosbox/opl.cpp
Normal file
File diff suppressed because it is too large
Load diff
231
src/oplsynth/dosbox/opl.h
Normal file
231
src/oplsynth/dosbox/opl.h
Normal file
|
|
@ -0,0 +1,231 @@
|
|||
/*
|
||||
* Copyright (C) 2002-2011 The DOSBox Team
|
||||
* OPL2/OPL3 emulation library
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* This library 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
* Originally based on ADLIBEMU.C, an AdLib/OPL2 emulation library by Ken Silverman
|
||||
* Copyright (C) 1998-2001 Ken Silverman
|
||||
* Ken Silverman's official web site: "http://www.advsys.net/ken"
|
||||
*/
|
||||
|
||||
|
||||
#define fltype double
|
||||
|
||||
/*
|
||||
define Bits, Bitu, Bit32s, Bit32u, Bit16s, Bit16u, Bit8s, Bit8u here
|
||||
*/
|
||||
/*
|
||||
#include <stdint.h>
|
||||
typedef uintptr_t Bitu;
|
||||
typedef intptr_t Bits;
|
||||
typedef uint32_t Bit32u;
|
||||
typedef int32_t Bit32s;
|
||||
typedef uint16_t Bit16u;
|
||||
typedef int16_t Bit16s;
|
||||
typedef uint8_t Bit8u;
|
||||
typedef int8_t Bit8s;
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
define attribution that inlines/forces inlining of a function (optional)
|
||||
*/
|
||||
#define OPL_INLINE inline
|
||||
|
||||
|
||||
#undef NUM_CHANNELS
|
||||
#if defined(OPLTYPE_IS_OPL3)
|
||||
#define NUM_CHANNELS 18
|
||||
#else
|
||||
#define NUM_CHANNELS 9
|
||||
#endif
|
||||
|
||||
#define MAXOPERATORS (NUM_CHANNELS*2)
|
||||
|
||||
|
||||
#define FL05 ((fltype)0.5)
|
||||
#define FL2 ((fltype)2.0)
|
||||
#define PI ((fltype)3.1415926535897932384626433832795)
|
||||
|
||||
|
||||
#define FIXEDPT 0x10000 // fixed-point calculations using 16+16
|
||||
#define FIXEDPT_LFO 0x1000000 // fixed-point calculations using 8+24
|
||||
|
||||
#define WAVEPREC 1024 // waveform precision (10 bits)
|
||||
|
||||
#define INTFREQU ((fltype)(14318180.0 / 288.0)) // clocking of the chip
|
||||
|
||||
|
||||
#define OF_TYPE_ATT 0
|
||||
#define OF_TYPE_DEC 1
|
||||
#define OF_TYPE_REL 2
|
||||
#define OF_TYPE_SUS 3
|
||||
#define OF_TYPE_SUS_NOKEEP 4
|
||||
#define OF_TYPE_OFF 5
|
||||
|
||||
#define ARC_CONTROL 0x00
|
||||
#define ARC_TVS_KSR_MUL 0x20
|
||||
#define ARC_KSL_OUTLEV 0x40
|
||||
#define ARC_ATTR_DECR 0x60
|
||||
#define ARC_SUSL_RELR 0x80
|
||||
#define ARC_FREQ_NUM 0xa0
|
||||
#define ARC_KON_BNUM 0xb0
|
||||
#define ARC_PERC_MODE 0xbd
|
||||
#define ARC_FEEDBACK 0xc0
|
||||
#define ARC_WAVE_SEL 0xe0
|
||||
|
||||
#define ARC_SECONDSET 0x100 // second operator set for OPL3
|
||||
|
||||
|
||||
#define OP_ACT_OFF 0x00
|
||||
#define OP_ACT_NORMAL 0x01 // regular channel activated (bitmasked)
|
||||
#define OP_ACT_PERC 0x02 // percussion channel activated (bitmasked)
|
||||
|
||||
#define BLOCKBUF_SIZE 512
|
||||
|
||||
|
||||
// vibrato constants
|
||||
#define VIBTAB_SIZE 8
|
||||
#define VIBFAC 70/50000 // no braces, integer mul/div
|
||||
|
||||
// tremolo constants and table
|
||||
#define TREMTAB_SIZE 53
|
||||
#define TREM_FREQ ((fltype)(3.7)) // tremolo at 3.7hz
|
||||
|
||||
|
||||
/* operator struct definition
|
||||
For OPL2 all 9 channels consist of two operators each, carrier and modulator.
|
||||
Channel x has operators x as modulator and operators (9+x) as carrier.
|
||||
For OPL3 all 18 channels consist either of two operators (2op mode) or four
|
||||
operators (4op mode) which is determined through register4 of the second
|
||||
adlib register set.
|
||||
Only the channels 0,1,2 (first set) and 9,10,11 (second set) can act as
|
||||
4op channels. The two additional operators for a channel y come from the
|
||||
2op channel y+3 so the operatorss y, (9+y), y+3, (9+y)+3 make up a 4op
|
||||
channel.
|
||||
*/
|
||||
typedef struct operator_struct {
|
||||
Bit32s cval, lastcval; // current output/last output (used for feedback)
|
||||
Bit32u tcount, wfpos, tinc; // time (position in waveform) and time increment
|
||||
fltype amp, step_amp; // and amplification (envelope)
|
||||
fltype vol; // volume
|
||||
fltype sustain_level; // sustain level
|
||||
Bit32s mfbi; // feedback amount
|
||||
fltype a0, a1, a2, a3; // attack rate function coefficients
|
||||
fltype decaymul, releasemul; // decay/release rate functions
|
||||
Bit32u op_state; // current state of operator (attack/decay/sustain/release/off)
|
||||
Bit32u toff;
|
||||
Bit32s freq_high; // highest three bits of the frequency, used for vibrato calculations
|
||||
Bit16s* cur_wform; // start of selected waveform
|
||||
Bit32u cur_wmask; // mask for selected waveform
|
||||
Bit32u act_state; // activity state (regular, percussion)
|
||||
bool sus_keep; // keep sustain level when decay finished
|
||||
bool vibrato,tremolo; // vibrato/tremolo enable bits
|
||||
|
||||
// variables used to provide non-continuous envelopes
|
||||
Bit32u generator_pos; // for non-standard sample rates we need to determine how many samples have passed
|
||||
Bits cur_env_step; // current (standardized) sample position
|
||||
Bits env_step_a,env_step_d,env_step_r; // number of std samples of one step (for attack/decay/release mode)
|
||||
Bit8u step_skip_pos_a; // position of 8-cyclic step skipping (always 2^x to check against mask)
|
||||
Bits env_step_skip_a; // bitmask that determines if a step is skipped (respective bit is zero then)
|
||||
|
||||
#if defined(OPLTYPE_IS_OPL3)
|
||||
bool is_4op,is_4op_attached; // base of a 4op channel/part of a 4op channel
|
||||
float left_pan,right_pan; // opl3 stereo panning amount
|
||||
#endif
|
||||
} op_type;
|
||||
|
||||
// per-chip variables
|
||||
class DBOPL : public OPLEmul
|
||||
{
|
||||
private:
|
||||
Bitu chip_num;
|
||||
op_type op[MAXOPERATORS];
|
||||
|
||||
Bits int_samplerate;
|
||||
|
||||
Bit8u status;
|
||||
Bit32u opl_index;
|
||||
#if defined(OPLTYPE_IS_OPL3)
|
||||
Bit8u adlibreg[512]; // adlib register set (including second set)
|
||||
Bit8u wave_sel[44]; // waveform selection
|
||||
#else
|
||||
Bit8u adlibreg[256]; // adlib register set
|
||||
Bit8u wave_sel[22]; // waveform selection
|
||||
#endif
|
||||
|
||||
fltype recipsamp; // inverse of sampling rate
|
||||
|
||||
// vibrato/tremolo tables
|
||||
Bit32s vib_table[VIBTAB_SIZE];
|
||||
Bit32s trem_table[TREMTAB_SIZE*2];
|
||||
|
||||
Bit32s vibval_const[BLOCKBUF_SIZE];
|
||||
Bit32s tremval_const[BLOCKBUF_SIZE];
|
||||
|
||||
// vibrato value tables (used per-operator)
|
||||
Bit32s vibval_var1[BLOCKBUF_SIZE];
|
||||
Bit32s vibval_var2[BLOCKBUF_SIZE];
|
||||
|
||||
// vibrato/trmolo value table pointers
|
||||
Bit32s *vibval1, *vibval2, *vibval3, *vibval4;
|
||||
Bit32s *tremval1, *tremval2, *tremval3, *tremval4;
|
||||
|
||||
// calculated frequency multiplication values (depend on sampling rate)
|
||||
fltype frqmul[16];
|
||||
|
||||
|
||||
// vibrato/tremolo increment/counter
|
||||
Bit32u vibtab_pos;
|
||||
Bit32u vibtab_add;
|
||||
Bit32u tremtab_pos;
|
||||
Bit32u tremtab_add;
|
||||
|
||||
// Enable full MIDI panning; disable OPL3 panning
|
||||
bool FullPan;
|
||||
|
||||
|
||||
// enable an operator
|
||||
void enable_operator(Bitu regbase, op_type* op_pt, Bit32u act_type);
|
||||
|
||||
void disable_operator(op_type* op_pt, Bit32u act_type);
|
||||
|
||||
// functions to change parameters of an operator
|
||||
void change_frequency(Bitu chanbase, Bitu regbase, op_type* op_pt);
|
||||
|
||||
void change_attackrate(Bitu regbase, op_type* op_pt);
|
||||
void change_decayrate(Bitu regbase, op_type* op_pt);
|
||||
void change_releaserate(Bitu regbase, op_type* op_pt);
|
||||
void change_sustainlevel(Bitu regbase, op_type* op_pt);
|
||||
void change_waveform(Bitu regbase, op_type* op_pt);
|
||||
void change_keepsustain(Bitu regbase, op_type* op_pt);
|
||||
void change_vibrato(Bitu regbase, op_type* op_pt);
|
||||
void change_feedback(Bitu chanbase, op_type* op_pt);
|
||||
|
||||
// general functions
|
||||
public:
|
||||
void Reset();
|
||||
void Update(float* sndptr, int numsamples);
|
||||
void WriteReg(int idx, int val);
|
||||
void SetPanning(int c, int pan);
|
||||
|
||||
DBOPL(bool stereo);
|
||||
};
|
||||
|
||||
static Bit32u generator_add; // should be a chip parameter
|
||||
Loading…
Reference in a new issue