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380 lines
13 KiB
C++
380 lines
13 KiB
C++
/*
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* Name: Low-level OPL2/OPL3 I/O interface
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* Project: MUS File Player Library
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* Version: 1.64
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* Author: Vladimir Arnost (QA-Software)
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* Last revision: Mar-1-1996
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* Compiler: Borland C++ 3.1, Watcom C/C++ 10.0
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*
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*/
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/*
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* Revision History:
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*
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* Aug-8-1994 V1.00 V.Arnost
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* Written from scratch
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* Aug-9-1994 V1.10 V.Arnost
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* Added stereo capabilities
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* Aug-13-1994 V1.20 V.Arnost
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* Stereo capabilities made functional
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* Aug-24-1994 V1.30 V.Arnost
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* Added Adlib and SB Pro II detection
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* Oct-30-1994 V1.40 V.Arnost
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* Added BLASTER variable parsing
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* Apr-14-1995 V1.50 V.Arnost
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* Some declarations moved from adlib.h to deftypes.h
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* Jul-22-1995 V1.60 V.Arnost
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* Ported to Watcom C
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* Simplified WriteChannel() and WriteValue()
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* Jul-24-1995 V1.61 V.Arnost
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* DetectBlaster() moved to MLMISC.C
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* Aug-8-1995 V1.62 V.Arnost
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* Module renamed to MLOPL_IO.C and functions renamed to OPLxxx
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* Mixer-related functions moved to module MLSBMIX.C
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* Sep-8-1995 V1.63 V.Arnost
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* OPLwriteReg() routine sped up on OPL3 cards
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* Mar-1-1996 V1.64 V.Arnost
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* Cleaned up the source
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*/
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#include <math.h>
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#ifdef _WIN32
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#include <dos.h>
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#include <conio.h>
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#endif
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#include "muslib.h"
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#include "opl.h"
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#include "c_cvars.h"
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const double HALF_PI = (M_PI*0.5);
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EXTERN_CVAR(Int, opl_core)
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extern int current_opl_core;
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OPLio::~OPLio()
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{
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}
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void OPLio::SetClockRate(double samples_per_tick)
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{
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}
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void OPLio::WriteDelay(int ticks)
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{
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}
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void OPLio::OPLwriteReg(int which, uint reg, uchar data)
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{
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if (IsOPL3)
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{
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reg |= (which & 1) << 8;
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which >>= 1;
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}
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if (chips[which] != NULL)
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{
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chips[which]->WriteReg(reg, data);
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}
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}
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/*
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* Write to an operator pair. To be used for register bases of 0x20, 0x40,
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* 0x60, 0x80 and 0xE0.
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*/
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void OPLio::OPLwriteChannel(uint regbase, uint channel, uchar data1, uchar data2)
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{
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static const uint op_num[OPL2CHANNELS] = {
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0x00, 0x01, 0x02, 0x08, 0x09, 0x0A, 0x10, 0x11, 0x12};
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uint which = channel / OPL2CHANNELS;
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uint reg = regbase + op_num[channel % OPL2CHANNELS];
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OPLwriteReg (which, reg, data1);
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OPLwriteReg (which, reg+3, data2);
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}
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/*
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* Write to channel a single value. To be used for register bases of
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* 0xA0, 0xB0 and 0xC0.
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*/
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void OPLio::OPLwriteValue(uint regbase, uint channel, uchar value)
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{
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uint which = channel / OPL2CHANNELS;
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uint reg = regbase + (channel % OPL2CHANNELS);
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OPLwriteReg (which, reg, value);
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}
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static WORD frequencies[] =
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{
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0x133, 0x133, 0x134, 0x134, 0x135, 0x136, 0x136, 0x137, 0x137, 0x138, 0x138, 0x139,
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0x139, 0x13a, 0x13b, 0x13b, 0x13c, 0x13c, 0x13d, 0x13d, 0x13e, 0x13f, 0x13f, 0x140,
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0x140, 0x141, 0x142, 0x142, 0x143, 0x143, 0x144, 0x144, 0x145, 0x146, 0x146, 0x147,
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0x147, 0x148, 0x149, 0x149, 0x14a, 0x14a, 0x14b, 0x14c, 0x14c, 0x14d, 0x14d, 0x14e,
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0x14f, 0x14f, 0x150, 0x150, 0x151, 0x152, 0x152, 0x153, 0x153, 0x154, 0x155, 0x155,
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0x156, 0x157, 0x157, 0x158, 0x158, 0x159, 0x15a, 0x15a, 0x15b, 0x15b, 0x15c, 0x15d,
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0x15d, 0x15e, 0x15f, 0x15f, 0x160, 0x161, 0x161, 0x162, 0x162, 0x163, 0x164, 0x164,
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0x165, 0x166, 0x166, 0x167, 0x168, 0x168, 0x169, 0x16a, 0x16a, 0x16b, 0x16c, 0x16c,
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0x16d, 0x16e, 0x16e, 0x16f, 0x170, 0x170, 0x171, 0x172, 0x172, 0x173, 0x174, 0x174,
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0x175, 0x176, 0x176, 0x177, 0x178, 0x178, 0x179, 0x17a, 0x17a, 0x17b, 0x17c, 0x17c,
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0x17d, 0x17e, 0x17e, 0x17f, 0x180, 0x181, 0x181, 0x182, 0x183, 0x183, 0x184, 0x185,
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0x185, 0x186, 0x187, 0x188, 0x188, 0x189, 0x18a, 0x18a, 0x18b, 0x18c, 0x18d, 0x18d,
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0x18e, 0x18f, 0x18f, 0x190, 0x191, 0x192, 0x192, 0x193, 0x194, 0x194, 0x195, 0x196,
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0x197, 0x197, 0x198, 0x199, 0x19a, 0x19a, 0x19b, 0x19c, 0x19d, 0x19d, 0x19e, 0x19f,
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0x1a0, 0x1a0, 0x1a1, 0x1a2, 0x1a3, 0x1a3, 0x1a4, 0x1a5, 0x1a6, 0x1a6, 0x1a7, 0x1a8,
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0x1a9, 0x1a9, 0x1aa, 0x1ab, 0x1ac, 0x1ad, 0x1ad, 0x1ae, 0x1af, 0x1b0, 0x1b0, 0x1b1,
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0x1b2, 0x1b3, 0x1b4, 0x1b4, 0x1b5, 0x1b6, 0x1b7, 0x1b8, 0x1b8, 0x1b9, 0x1ba, 0x1bb,
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0x1bc, 0x1bc, 0x1bd, 0x1be, 0x1bf, 0x1c0, 0x1c0, 0x1c1, 0x1c2, 0x1c3, 0x1c4, 0x1c4,
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0x1c5, 0x1c6, 0x1c7, 0x1c8, 0x1c9, 0x1c9, 0x1ca, 0x1cb, 0x1cc, 0x1cd, 0x1ce, 0x1ce,
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0x1cf, 0x1d0, 0x1d1, 0x1d2, 0x1d3, 0x1d3, 0x1d4, 0x1d5, 0x1d6, 0x1d7, 0x1d8, 0x1d8,
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0x1d9, 0x1da, 0x1db, 0x1dc, 0x1dd, 0x1de, 0x1de, 0x1df, 0x1e0, 0x1e1, 0x1e2, 0x1e3,
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0x1e4, 0x1e5, 0x1e5, 0x1e6, 0x1e7, 0x1e8, 0x1e9, 0x1ea, 0x1eb, 0x1ec, 0x1ed, 0x1ed,
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0x1ee, 0x1ef, 0x1f0, 0x1f1, 0x1f2, 0x1f3, 0x1f4, 0x1f5, 0x1f6, 0x1f6, 0x1f7, 0x1f8,
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0x1f9, 0x1fa, 0x1fb, 0x1fc, 0x1fd, 0x1fe, 0x1ff, 0x200,
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0x201, 0x201, 0x202, 0x203, 0x204, 0x205, 0x206, 0x207, 0x208, 0x209, 0x20a, 0x20b, 0x20c, 0x20d, 0x20e, 0x20f,
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0x210, 0x210, 0x211, 0x212, 0x213, 0x214, 0x215, 0x216, 0x217, 0x218, 0x219, 0x21a, 0x21b, 0x21c, 0x21d, 0x21e,
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0x21f, 0x220, 0x221, 0x222, 0x223, 0x224, 0x225, 0x226, 0x227, 0x228, 0x229, 0x22a, 0x22b, 0x22c, 0x22d, 0x22e,
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0x22f, 0x230, 0x231, 0x232, 0x233, 0x234, 0x235, 0x236, 0x237, 0x238, 0x239, 0x23a, 0x23b, 0x23c, 0x23d, 0x23e,
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0x23f, 0x240, 0x241, 0x242, 0x244, 0x245, 0x246, 0x247, 0x248, 0x249, 0x24a, 0x24b, 0x24c, 0x24d, 0x24e, 0x24f,
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0x250, 0x251, 0x252, 0x253, 0x254, 0x256, 0x257, 0x258, 0x259, 0x25a, 0x25b, 0x25c, 0x25d, 0x25e, 0x25f, 0x260,
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0x262, 0x263, 0x264, 0x265, 0x266, 0x267, 0x268, 0x269, 0x26a, 0x26c, 0x26d, 0x26e, 0x26f, 0x270, 0x271, 0x272,
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0x273, 0x275, 0x276, 0x277, 0x278, 0x279, 0x27a, 0x27b, 0x27d, 0x27e, 0x27f, 0x280, 0x281, 0x282, 0x284, 0x285,
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0x286, 0x287, 0x288, 0x289, 0x28b, 0x28c, 0x28d, 0x28e, 0x28f, 0x290, 0x292, 0x293, 0x294, 0x295, 0x296, 0x298,
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0x299, 0x29a, 0x29b, 0x29c, 0x29e, 0x29f, 0x2a0, 0x2a1, 0x2a2, 0x2a4, 0x2a5, 0x2a6, 0x2a7, 0x2a9, 0x2aa, 0x2ab,
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0x2ac, 0x2ae, 0x2af, 0x2b0, 0x2b1, 0x2b2, 0x2b4, 0x2b5, 0x2b6, 0x2b7, 0x2b9, 0x2ba, 0x2bb, 0x2bd, 0x2be, 0x2bf,
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0x2c0, 0x2c2, 0x2c3, 0x2c4, 0x2c5, 0x2c7, 0x2c8, 0x2c9, 0x2cb, 0x2cc, 0x2cd, 0x2ce, 0x2d0, 0x2d1, 0x2d2, 0x2d4,
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0x2d5, 0x2d6, 0x2d8, 0x2d9, 0x2da, 0x2dc, 0x2dd, 0x2de, 0x2e0, 0x2e1, 0x2e2, 0x2e4, 0x2e5, 0x2e6, 0x2e8, 0x2e9,
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0x2ea, 0x2ec, 0x2ed, 0x2ee, 0x2f0, 0x2f1, 0x2f2, 0x2f4, 0x2f5, 0x2f6, 0x2f8, 0x2f9, 0x2fb, 0x2fc, 0x2fd, 0x2ff,
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0x300, 0x302, 0x303, 0x304, 0x306, 0x307, 0x309, 0x30a, 0x30b, 0x30d, 0x30e, 0x310, 0x311, 0x312, 0x314, 0x315,
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0x317, 0x318, 0x31a, 0x31b, 0x31c, 0x31e, 0x31f, 0x321, 0x322, 0x324, 0x325, 0x327, 0x328, 0x329, 0x32b, 0x32c,
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0x32e, 0x32f, 0x331, 0x332, 0x334, 0x335, 0x337, 0x338, 0x33a, 0x33b, 0x33d, 0x33e, 0x340, 0x341, 0x343, 0x344,
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0x346, 0x347, 0x349, 0x34a, 0x34c, 0x34d, 0x34f, 0x350, 0x352, 0x353, 0x355, 0x357, 0x358, 0x35a, 0x35b, 0x35d,
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0x35e, 0x360, 0x361, 0x363, 0x365, 0x366, 0x368, 0x369, 0x36b, 0x36c, 0x36e, 0x370, 0x371, 0x373, 0x374, 0x376,
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0x378, 0x379, 0x37b, 0x37c, 0x37e, 0x380, 0x381, 0x383, 0x384, 0x386, 0x388, 0x389, 0x38b, 0x38d, 0x38e, 0x390,
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0x392, 0x393, 0x395, 0x397, 0x398, 0x39a, 0x39c, 0x39d, 0x39f, 0x3a1, 0x3a2, 0x3a4, 0x3a6, 0x3a7, 0x3a9, 0x3ab,
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0x3ac, 0x3ae, 0x3b0, 0x3b1, 0x3b3, 0x3b5, 0x3b7, 0x3b8, 0x3ba, 0x3bc, 0x3bd, 0x3bf, 0x3c1, 0x3c3, 0x3c4, 0x3c6,
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0x3c8, 0x3ca, 0x3cb, 0x3cd, 0x3cf, 0x3d1, 0x3d2, 0x3d4, 0x3d6, 0x3d8, 0x3da, 0x3db, 0x3dd, 0x3df, 0x3e1, 0x3e3,
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0x3e4, 0x3e6, 0x3e8, 0x3ea, 0x3ec, 0x3ed, 0x3ef, 0x3f1, 0x3f3, 0x3f5, 0x3f6, 0x3f8, 0x3fa, 0x3fc, 0x3fe, 0x36c
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};
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/*
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* Write frequency/octave/keyon data to a channel
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* [RH] This is totally different from the original MUS library code
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* but matches exactly what DMX does. I haven't a clue why there are 284
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* special bytes at the beginning of the table for the first few notes.
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* That last byte in the table doesn't look right, either, but that's what
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* it really is.
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*/
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void OPLio::OPLwriteFreq(uint channel, uint note, uint pitch, uint keyon)
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{
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int octave = 0;
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int j = (note << 5) + pitch;
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if (j < 0)
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{
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j = 0;
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}
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else if (j >= 284)
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{
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j -= 284;
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octave = j / (32*12);
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if (octave > 7)
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{
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octave = 7;
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}
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j = (j % (32*12)) + 284;
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}
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int i = frequencies[j] | (octave << 10);
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OPLwriteValue (0xA0, channel, (BYTE)i);
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OPLwriteValue (0xB0, channel, (BYTE)(i>>8)|(keyon<<5));
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}
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/*
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* Adjust volume value (register 0x40)
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*/
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inline uint OPLio::OPLconvertVolume(uint data, uint volume)
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{
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static uchar volumetable[128] = {
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0, 1, 3, 5, 6, 8, 10, 11,
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13, 14, 16, 17, 19, 20, 22, 23,
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25, 26, 27, 29, 30, 32, 33, 34,
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36, 37, 39, 41, 43, 45, 47, 49,
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50, 52, 54, 55, 57, 59, 60, 61,
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63, 64, 66, 67, 68, 69, 71, 72,
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73, 74, 75, 76, 77, 79, 80, 81,
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82, 83, 84, 84, 85, 86, 87, 88,
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89, 90, 91, 92, 92, 93, 94, 95,
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96, 96, 97, 98, 99, 99, 100, 101,
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101, 102, 103, 103, 104, 105, 105, 106,
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107, 107, 108, 109, 109, 110, 110, 111,
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112, 112, 113, 113, 114, 114, 115, 115,
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116, 117, 117, 118, 118, 119, 119, 120,
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120, 121, 121, 122, 122, 123, 123, 123,
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124, 124, 125, 125, 126, 126, 127, 127};
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return 0x3F - (((0x3F - data) *
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(uint)volumetable[volume <= 127 ? volume : 127]) >> 7);
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}
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uint OPLio::OPLpanVolume(uint volume, int pan)
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{
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if (pan >= 0)
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return volume;
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else
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return (volume * (pan + 64)) / 64;
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}
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/*
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* Write volume data to a channel
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*/
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void OPLio::OPLwriteVolume(uint channel, struct OPL2instrument *instr, uint volume)
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{
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if (instr != 0)
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{
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OPLwriteChannel(0x40, channel, ((instr->feedback & 1) ?
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OPLconvertVolume(instr->level_1, volume) : instr->level_1) | instr->scale_1,
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OPLconvertVolume(instr->level_2, volume) | instr->scale_2);
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}
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}
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/*
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* Write pan (balance) data to a channel
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*/
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void OPLio::OPLwritePan(uint channel, struct OPL2instrument *instr, int pan)
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{
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if (instr != 0)
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{
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uchar bits;
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if (pan < -36) bits = 0x10; // left
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else if (pan > 36) bits = 0x20; // right
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else bits = 0x30; // both
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OPLwriteValue(0xC0, channel, instr->feedback | bits);
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// Set real panning if we're using emulated chips.
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int chanper = IsOPL3 ? OPL3CHANNELS : OPL2CHANNELS;
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int which = channel / chanper;
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if (chips[which] != NULL)
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{
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// This is the MIDI-recommended pan formula. 0 and 1 are
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// both hard left so that 64 can be perfectly center.
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// (Note that the 'pan' passed to this function is the
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// MIDI pan position, subtracted by 64.)
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double level = (pan <= -63) ? 0 : (pan + 64 - 1) / 126.0;
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chips[which]->SetPanning(channel % chanper,
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(float)cos(HALF_PI * level), (float)sin(HALF_PI * level));
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}
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}
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}
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/*
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* Write an instrument to a channel
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*
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* Instrument layout:
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*
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* Operator1 Operator2 Descr.
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* data[0] data[7] reg. 0x20 - tremolo/vibrato/sustain/KSR/multi
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* data[1] data[8] reg. 0x60 - attack rate/decay rate
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* data[2] data[9] reg. 0x80 - sustain level/release rate
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* data[3] data[10] reg. 0xE0 - waveform select
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* data[4] data[11] reg. 0x40 - key scale level
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* data[5] data[12] reg. 0x40 - output level (bottom 6 bits only)
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* data[6] reg. 0xC0 - feedback/AM-FM (both operators)
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*/
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void OPLio::OPLwriteInstrument(uint channel, struct OPL2instrument *instr)
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{
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OPLwriteChannel(0x40, channel, 0x3F, 0x3F); // no volume
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OPLwriteChannel(0x20, channel, instr->trem_vibr_1, instr->trem_vibr_2);
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OPLwriteChannel(0x60, channel, instr->att_dec_1, instr->att_dec_2);
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OPLwriteChannel(0x80, channel, instr->sust_rel_1, instr->sust_rel_2);
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OPLwriteChannel(0xE0, channel, instr->wave_1, instr->wave_2);
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OPLwriteValue (0xC0, channel, instr->feedback | 0x30);
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}
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/*
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* Stop all sounds
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*/
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void OPLio::OPLshutup(void)
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{
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uint i;
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for(i = 0; i < OPLchannels; i++)
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{
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OPLwriteChannel(0x40, i, 0x3F, 0x3F); // turn off volume
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OPLwriteChannel(0x60, i, 0xFF, 0xFF); // the fastest attack, decay
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OPLwriteChannel(0x80, i, 0x0F, 0x0F); // ... and release
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OPLwriteValue(0xB0, i, 0); // KEY-OFF
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}
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}
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/*
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* Initialize hardware upon startup
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*/
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int OPLio::OPLinit(uint numchips, bool stereo, bool initopl3)
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{
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assert(numchips >= 1 && numchips <= countof(chips));
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uint i;
|
|
IsOPL3 = (current_opl_core == 1 || current_opl_core == 2 || current_opl_core == 3);
|
|
|
|
memset(chips, 0, sizeof(chips));
|
|
if (IsOPL3)
|
|
{
|
|
numchips = (numchips + 1) >> 1;
|
|
}
|
|
for (i = 0; i < numchips; ++i)
|
|
{
|
|
OPLEmul *chip = IsOPL3 ? (current_opl_core == 1 ? DBOPLCreate(stereo) : (current_opl_core == 2 ? JavaOPLCreate(stereo) : NukedOPL3Create(stereo))) : YM3812Create(stereo);
|
|
if (chip == NULL)
|
|
{
|
|
break;
|
|
}
|
|
chips[i] = chip;
|
|
}
|
|
NumChips = i;
|
|
OPLchannels = i * (IsOPL3 ? OPL3CHANNELS : OPL2CHANNELS);
|
|
OPLwriteInitState(initopl3);
|
|
return i;
|
|
}
|
|
|
|
void OPLio::OPLwriteInitState(bool initopl3)
|
|
{
|
|
for (uint i = 0; i < NumChips; ++i)
|
|
{
|
|
int chip = i << (int)IsOPL3;
|
|
if (IsOPL3 && initopl3)
|
|
{
|
|
OPLwriteReg(chip, 0x105, 0x01); // enable YMF262/OPL3 mode
|
|
OPLwriteReg(chip, 0x104, 0x00); // disable 4-operator mode
|
|
}
|
|
OPLwriteReg(chip, 0x01, 0x20); // enable Waveform Select
|
|
OPLwriteReg(chip, 0x0B, 0x40); // turn off CSW mode
|
|
OPLwriteReg(chip, 0xBD, 0x00); // set vibrato/tremolo depth to low, set melodic mode
|
|
}
|
|
OPLshutup();
|
|
}
|
|
|
|
/*
|
|
* Deinitialize hardware before shutdown
|
|
*/
|
|
void OPLio::OPLdeinit(void)
|
|
{
|
|
for (size_t i = 0; i < countof(chips); ++i)
|
|
{
|
|
if (chips[i] != NULL)
|
|
{
|
|
delete chips[i];
|
|
chips[i] = NULL;
|
|
}
|
|
}
|
|
}
|