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- updated the license in fmopl.cpp to the one in the current version of the original file.

This commit is contained in:
Christoph Oelckers 2017-04-21 17:48:40 +02:00
parent f7a22154b7
commit 0ed3ee6267
1 changed files with 14 additions and 29 deletions
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35
src/sound/oplsynth/fmopl.cpp
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@ -1,37 +1,22 @@
// license:GPL-2.0+
// copyright-holders:Jarek Burczynski,Tatsuyuki Satoh
/* /*
This file is based on fmopl.c from MAME 0.95. The non-YM3816 parts have been This file is based on fmopl.c from MAME. The non-YM3816 parts have been
ripped out in the interest of making this simpler, since Doom music doesn't ripped out in the interest of making this simpler, since Doom music doesn't
need them. I also made it render the sound a voice at a time instead of a need them. I also made it render the sound a voice at a time instead of a
sample at a time, so unused voices don't waste time being calculated. If all sample at a time, so unused voices don't waste time being calculated. If all
voices are playing, it's not much difference, but it does offer a big voices are playing, it's not much difference, but it does offer a big
improvement when only a few voices are playing. improvement when only a few voices are playing.
Here is the appropriate section from mame.txt:
VI. Reuse of Source Code
--------------------------
This chapter might not apply to specific portions of MAME (e.g. CPU
emulators) which bear different copyright notices.
The source code cannot be used in a commercial product without the written
authorization of the authors. Use in non-commercial products is allowed, and
indeed encouraged. If you use portions of the MAME source code in your
program, however, you must make the full source code freely available as
well.
Usage of the _information_ contained in the source code is free for any use.
However, given the amount of time and energy it took to collect this
information, if you find new information we would appreciate if you made it
freely available as well.
*/
/*
** **
** File: fmopl.c - software implementation of FM sound generator ** File: fmopl.c - software implementation of FM sound generator
** types OPL and OPL2 ** types OPL and OPL2
** **
** Copyright (C) 2002,2003 Jarek Burczynski (bujar at mame dot net) ** Copyright Jarek Burczynski (bujar at mame dot net)
** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmulator development ** Copyright Tatsuyuki Satoh , MultiArcadeMachineEmulator development
** **
** Version 0.72 ** Version 0.72
** **
@ -49,12 +34,12 @@ Revision History:
14-06-2003 Jarek Burczynski: 14-06-2003 Jarek Burczynski:
- implemented all of the status register flags in Y8950 emulation - implemented all of the status register flags in Y8950 emulation
- renamed Y8950SetDeltaTMemory() parameters from _rom_ to _mem_ since - renamed y8950_set_delta_t_memory() parameters from _rom_ to _mem_ since
they can be either RAM or ROM they can be either RAM or ROM
08-10-2002 Jarek Burczynski (thanks to Dox for the YM3526 chip) 08-10-2002 Jarek Burczynski (thanks to Dox for the YM3526 chip)
- corrected YM3526Read() to always set bit 2 and bit 1 - corrected ym3526_read() to always set bit 2 and bit 1
to HIGH state - identical to YM3812Read (verified on real YM3526) to HIGH state - identical to ym3812_read (verified on real YM3526)
04-28-2002 Jarek Burczynski: 04-28-2002 Jarek Burczynski:
- binary exact Envelope Generator (verified on real YM3812); - binary exact Envelope Generator (verified on real YM3812);
@ -62,7 +47,7 @@ Revision History:
rates are 2 times slower and volume resolution is one bit less rates are 2 times slower and volume resolution is one bit less
- modified interface functions (they no longer return pointer - - modified interface functions (they no longer return pointer -
that's internal to the emulator now): that's internal to the emulator now):
- new wrapper functions for OPLCreate: YM3526Init(), YM3812Init() and Y8950Init() - new wrapper functions for OPLCreate: ym3526_init(), ym3812_init() and y8950_init()
- corrected 'off by one' error in feedback calculations (when feedback is off) - corrected 'off by one' error in feedback calculations (when feedback is off)
- enabled waveform usage (credit goes to Vlad Romascanu and zazzal22) - enabled waveform usage (credit goes to Vlad Romascanu and zazzal22)
- speeded up noise generator calculations (Nicola Salmoria) - speeded up noise generator calculations (Nicola Salmoria)
@ -199,7 +184,7 @@ struct OPL_SLOT
uint8_t vib; /* LFO Phase Modulation enable flag (active high)*/ uint8_t vib; /* LFO Phase Modulation enable flag (active high)*/
/* waveform select */ /* waveform select */
unsigned int wavetable; uint16_t wavetable;
}; };
struct OPL_CH struct OPL_CH