113 lines
3.2 KiB
C
113 lines
3.2 KiB
C
|
/*
|
||
|
|
* OPL.h
|
||
|
|
* -----
|
||
|
|
* Purpose: Translate data coming from OpenMPT's mixer into OPL commands to be sent to the Opal emulator.
|
||
|
|
* Notes : (currently none)
|
||
|
|
* Authors: OpenMPT Devs
|
||
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include "BuildSettings.h"
|
||
|
|
|
||
|
|
#include "Snd_defs.h"
|
||
|
|
|
||
|
|
class Opal;
|
||
|
|
|
||
|
|
OPENMPT_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
class OPL
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
enum OPLRegisters : uint8
|
||
|
|
{
|
||
|
|
// Operators (combine with result of OperatorToRegister)
|
||
|
|
AM_VIB = 0x20, // AM / VIB / EG / KSR / Multiple (0x20 to 0x35)
|
||
|
|
KSL_LEVEL = 0x40, // KSL / Total level (0x40 to 0x55)
|
||
|
|
ATTACK_DECAY = 0x60, // Attack rate / Decay rate (0x60 to 0x75)
|
||
|
|
SUSTAIN_RELEASE = 0x80, // Sustain level / Release rate (0x80 to 0x95)
|
||
|
|
WAVE_SELECT = 0xE0, // Wave select (0xE0 to 0xF5)
|
||
|
|
|
||
|
|
// Channels (combine with result of ChannelToRegister)
|
||
|
|
FNUM_LOW = 0xA0, // F-number low bits (0xA0 to 0xA8)
|
||
|
|
KEYON_BLOCK = 0xB0, // F-number high bits / Key on / Block (octave) (0xB0 to 0xB8)
|
||
|
|
FEEDBACK_CONNECTION = 0xC0, // Feedback / Connection (0xC0 to 0xC8)
|
||
|
|
};
|
||
|
|
|
||
|
|
enum OPLValues : uint8
|
||
|
|
{
|
||
|
|
// AM_VIB
|
||
|
|
TREMOLO_ON = 0x80,
|
||
|
|
VIBRATO_ON = 0x40,
|
||
|
|
SUSTAIN_ON = 0x20,
|
||
|
|
KSR = 0x10, // Key scaling rate
|
||
|
|
MULTIPLE_MASK = 0x0F, // Frequency multiplier
|
||
|
|
|
||
|
|
// KSL_LEVEL
|
||
|
|
KSL_MASK = 0xC0, // Envelope scaling bits
|
||
|
|
TOTAL_LEVEL_MASK = 0x3F, // Strength (volume) of OP
|
||
|
|
|
||
|
|
// ATTACK_DECAY
|
||
|
|
ATTACK_MASK = 0xF0,
|
||
|
|
DECAY_MASK = 0x0F,
|
||
|
|
|
||
|
|
// SUSTAIN_RELEASE
|
||
|
|
SUSTAIN_MASK = 0xF0,
|
||
|
|
RELEASE_MASK = 0x0F,
|
||
|
|
|
||
|
|
// KEYON_BLOCK
|
||
|
|
KEYON_BIT = 0x20,
|
||
|
|
|
||
|
|
// FEEDBACK_CONNECTION
|
||
|
|
FEEDBACK_MASK = 0x0E, // Valid just for first OP of a voice
|
||
|
|
CONNECTION_BIT = 0x01,
|
||
|
|
VOICE_TO_LEFT = 0x10,
|
||
|
|
VOICE_TO_RIGHT = 0x20,
|
||
|
|
STEREO_BITS = VOICE_TO_LEFT | VOICE_TO_RIGHT,
|
||
|
|
};
|
||
|
|
|
||
|
|
OPL(uint32 samplerate);
|
||
|
|
~OPL();
|
||
|
|
|
||
|
|
void Initialize(uint32 samplerate);
|
||
|
|
void Mix(int32 *buffer, size_t count, uint32 volumeFactorQ16);
|
||
|
|
|
||
|
|
void NoteOff(CHANNELINDEX c);
|
||
|
|
void NoteCut(CHANNELINDEX c, bool unassign = true);
|
||
|
|
void Frequency(CHANNELINDEX c, uint32 milliHertz, bool keyOff, bool beatingOscillators);
|
||
|
|
void Volume(CHANNELINDEX c, uint8 vol, bool applyToModulator);
|
||
|
|
int8 Pan(CHANNELINDEX c, int32 pan);
|
||
|
|
void Patch(CHANNELINDEX c, const OPLPatch &patch);
|
||
|
|
bool IsActive(CHANNELINDEX c) const { return GetVoice(c) != OPL_CHANNEL_INVALID; }
|
||
|
|
void MoveChannel(CHANNELINDEX from, CHANNELINDEX to);
|
||
|
|
void Reset();
|
||
|
|
|
||
|
|
protected:
|
||
|
|
static uint16 ChannelToRegister(uint8 oplCh);
|
||
|
|
static uint16 OperatorToRegister(uint8 oplCh);
|
||
|
|
static uint8 CalcVolume(uint8 trackerVol, uint8 kslVolume);
|
||
|
|
uint8 GetVoice(CHANNELINDEX c) const;
|
||
|
|
uint8 AllocateVoice(CHANNELINDEX c);
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
OPL_CHANNELS = 18, // 9 for OPL2 or 18 for OPL3
|
||
|
|
OPL_CHANNEL_CUT = 0x80, // Indicates that the channel has been cut and used as a hint to re-use the channel for the same tracker channel if possible
|
||
|
|
OPL_CHANNEL_MASK = 0x7F,
|
||
|
|
OPL_CHANNEL_INVALID = 0xFF,
|
||
|
|
OPL_BASERATE = 49716,
|
||
|
|
};
|
||
|
|
|
||
|
|
std::unique_ptr<Opal> m_opl;
|
||
|
|
|
||
|
|
std::array<uint8, OPL_CHANNELS> m_KeyOnBlock;
|
||
|
|
std::array<CHANNELINDEX, OPL_CHANNELS> m_OPLtoChan;
|
||
|
|
std::array<uint8, MAX_CHANNELS> m_ChanToOPL;
|
||
|
|
std::array<OPLPatch, OPL_CHANNELS> m_Patches;
|
||
|
|
|
||
|
|
bool m_isActive = false;
|
||
|
|
};
|
||
|
|
|
||
|
|
OPENMPT_NAMESPACE_END
|