mirror of
https://github.com/dborth/snes9xgx.git
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334 lines
12 KiB
C
334 lines
12 KiB
C
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/**********************************************************************************
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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(c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
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Jerremy Koot (jkoot@snes9x.com)
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(c) Copyright 2002 - 2004 Matthew Kendora
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(c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org)
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(c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/)
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(c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net)
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(c) Copyright 2002 - 2006 Brad Jorsch (anomie@users.sourceforge.net),
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funkyass (funkyass@spam.shaw.ca),
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Kris Bleakley (codeviolation@hotmail.com),
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Nach (n-a-c-h@users.sourceforge.net), and
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zones (kasumitokoduck@yahoo.com)
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BS-X C emulator code
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(c) Copyright 2005 - 2006 Dreamer Nom,
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zones
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C4 x86 assembler and some C emulation code
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(c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com),
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Nach,
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zsKnight (zsknight@zsnes.com)
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C4 C++ code
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(c) Copyright 2003 - 2006 Brad Jorsch,
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Nach
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DSP-1 emulator code
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(c) Copyright 1998 - 2006 _Demo_,
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Andreas Naive (andreasnaive@gmail.com)
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Gary Henderson,
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Ivar (ivar@snes9x.com),
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John Weidman,
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Kris Bleakley,
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Matthew Kendora,
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Nach,
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neviksti (neviksti@hotmail.com)
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DSP-2 emulator code
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(c) Copyright 2003 John Weidman,
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Kris Bleakley,
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Lord Nightmare (lord_nightmare@users.sourceforge.net),
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Matthew Kendora,
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neviksti
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DSP-3 emulator code
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(c) Copyright 2003 - 2006 John Weidman,
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Kris Bleakley,
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Lancer,
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z80 gaiden
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DSP-4 emulator code
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(c) Copyright 2004 - 2006 Dreamer Nom,
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John Weidman,
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Kris Bleakley,
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Nach,
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z80 gaiden
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OBC1 emulator code
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(c) Copyright 2001 - 2004 zsKnight,
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pagefault (pagefault@zsnes.com),
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Kris Bleakley,
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Ported from x86 assembler to C by sanmaiwashi
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SPC7110 and RTC C++ emulator code
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(c) Copyright 2002 Matthew Kendora with research by
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zsKnight,
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John Weidman,
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Dark Force
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S-DD1 C emulator code
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(c) Copyright 2003 Brad Jorsch with research by
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Andreas Naive,
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John Weidman
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S-RTC C emulator code
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(c) Copyright 2001-2006 byuu,
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John Weidman
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ST010 C++ emulator code
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(c) Copyright 2003 Feather,
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John Weidman,
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Kris Bleakley,
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Matthew Kendora
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Super FX x86 assembler emulator code
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(c) Copyright 1998 - 2003 _Demo_,
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pagefault,
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zsKnight,
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Super FX C emulator code
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(c) Copyright 1997 - 1999 Ivar,
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Gary Henderson,
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John Weidman
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Sound DSP emulator code is derived from SNEeSe and OpenSPC:
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(c) Copyright 1998 - 2003 Brad Martin
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(c) Copyright 1998 - 2006 Charles Bilyue'
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SH assembler code partly based on x86 assembler code
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(c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se)
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2xSaI filter
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(c) Copyright 1999 - 2001 Derek Liauw Kie Fa
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HQ2x filter
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(c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com)
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Specific ports contains the works of other authors. See headers in
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individual files.
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Snes9x homepage: http://www.snes9x.com
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Permission to use, copy, modify and/or distribute Snes9x in both binary
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and source form, for non-commercial purposes, is hereby granted without
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fee, providing that this license information and copyright notice appear
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with all copies and any derived work.
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This software is provided 'as-is', without any express or implied
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warranty. In no event shall the authors be held liable for any damages
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arising from the use of this software or it's derivatives.
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Snes9x is freeware for PERSONAL USE only. Commercial users should
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seek permission of the copyright holders first. Commercial use includes,
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but is not limited to, charging money for Snes9x or software derived from
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Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
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using Snes9x as a promotion for your commercial product.
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The copyright holders request that bug fixes and improvements to the code
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should be forwarded to them so everyone can benefit from the modifications
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in future versions.
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Super NES and Super Nintendo Entertainment System are trademarks of
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Nintendo Co., Limited and its subsidiary companies.
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**********************************************************************************/
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#ifndef _SOUND_H_
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#define _SOUND_H_
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enum
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{
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SOUND_SAMPLE = 0,
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SOUND_NOISE
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};
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enum
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{
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SOUND_SILENT,
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SOUND_ATTACK,
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SOUND_DECAY,
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SOUND_SUSTAIN,
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SOUND_RELEASE,
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SOUND_GAIN,
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SOUND_INCREASE_LINEAR,
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SOUND_INCREASE_BENT_LINE,
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SOUND_DECREASE_LINEAR,
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SOUND_DECREASE_EXPONENTIAL
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};
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enum
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{
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MODE_NONE = SOUND_SILENT,
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MODE_ADSR,
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MODE_RELEASE = SOUND_RELEASE,
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MODE_GAIN,
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MODE_INCREASE_LINEAR,
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MODE_INCREASE_BENT_LINE,
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MODE_DECREASE_LINEAR,
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MODE_DECREASE_EXPONENTIAL
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};
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#define NUM_CHANNELS 8
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#define SOUND_DECODE_LENGTH 16
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#define SOUND_BUFFER_SIZE (1024 * 16)
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#define MAX_BUFFER_SIZE SOUND_BUFFER_SIZE
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#define SOUND_BUFFER_SIZE_MASK (SOUND_BUFFER_SIZE - 1)
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#define ENV_RANGE 0x800
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#define ENV_MAX 0x7FF
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#define ENV_SHIFT 4
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#ifdef __sgi
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#include <audio.h>
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#endif /* __sgi */
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typedef struct {
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int sound_fd; // ** port specific
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int sound_switch; // channel on/off
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int playback_rate; // 32000Hz is recommended
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int buffer_size; // ** port specific
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int noise_gen; // ** unused
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bool8 mute_sound; // mute
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int stereo; // stereo or mono
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bool8 sixteen_bit; // 16bit or 8bit sample
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bool8 encoded; // ** port specific
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#ifdef __sun
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int last_eof; // ** port specific
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#endif
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#ifdef __sgi
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ALport al_port; // ** port specific
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#endif /* __sgi */
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int32 samples_mixed_so_far; // ** port specific
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int32 play_position; // ** port specific
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uint32 err_counter; // ** port specific
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uint32 err_rate; // ** port specific
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uint16 stereo_switch; // stereo channel on/off
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double pitch_mul; // used with Settings.FixFrequency
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} SoundStatus;
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EXTERN_C volatile SoundStatus so;
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typedef struct {
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int32 state; // ADSR/GAIN/RELEASE/SILENT
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int32 type; // sample or noise
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short volume_left; // VOL(L)
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short volume_right; // VOL(R)
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uint32 hertz; // ((P(H) << 8) + P(L)) * 8
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uint32 frequency; // normalized pitch
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uint32 count; // ** unused
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bool8 loop; // loop flag in BRR header
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int32 envx; // ** unused
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short left_vol_level; // ** unused
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short right_vol_level; // ** unused
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short envx_target; // ** unused
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uint32 env_error; // ** unused
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uint32 erate; // ** unused
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int32 direction; // ** unused
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uint32 attack_rate; // ** unused
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uint32 decay_rate; // ** unused
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uint32 sustain_rate; // ** unused
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uint32 release_rate; // ** unused
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uint32 sustain_level; // ** unused
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signed short sample; // signed 16 bit sample
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signed short decoded[16]; // decoded 16 samples
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signed short previous16[2];
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signed short *block;
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uint16 sample_number; // SRCN
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bool8 last_block; // end flag in BRR header
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bool8 needs_decode; // true when BRR block will be decoded
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uint32 block_pointer; // currect block
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uint32 sample_pointer; // pointer in a block
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int32 *echo_buf_ptr; // EchoBuffer[] or DummyEchoBuffer[]
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int32 mode; // ADSR/GAIN/RELEASE/SILENT
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int32 envxx; // ** unused
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signed short next_sample; // ** unused
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int32 interpolate; // ** unused
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int32 previous[2]; // last two nybbles for BRR decode
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uint32 dummy[8]; // Just incase they are needed in the future,
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// for snapshot compatibility.
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int32 nb_index; // index of cached samples
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int16 nb_sample[4]; // cached samples for interpolation
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int16 out_sample; // OUTX << 4
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int32 xenvx; // ENVX << 4
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int32 xenvx_target; // ENVX target << 4
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int32 xenv_count; // counter for envelope timing
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int32 xenv_rate; // envelope timing from env_counter_table
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int32 xsmp_count; // counter for pitch
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int32 xattack_rate; // envelope timing from env_counter_table
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int32 xdecay_rate; // envelope timing from env_counter_table
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int32 xsustain_rate; // envelope timing from env_counter_table
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int32 xsustain_level; // (128 / 8 * (SR + 1)) << 4
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} Channel;
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typedef struct
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{
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short master_volume_left; // MVOL(L)
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short master_volume_right; // MVOL(R)
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short echo_volume_left; // EVOL(L)
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short echo_volume_right; // EVOL(R)
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int32 echo_enable; // EON
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int32 echo_feedback; // EFB
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int32 echo_ptr; // index of Echo[]
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int32 echo_buffer_size; // num of echo samples
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int32 echo_write_enabled; // ECEN
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int32 echo_channel_enable; // ** unused
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int32 pitch_mod; // PMOD
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uint32 dummy[3]; // Just incase they are needed in the future,
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// for snapshot compatibility.
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Channel channels[NUM_CHANNELS];
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bool8 no_filter; // true when simple echo
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int32 master_volume[2];
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int32 echo_volume[2];
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int32 noise_hertz; // ** unused
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int32 noise_count; // counter for noise frequency
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int32 noise_rate; // noise frequency from env_counter_table
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} SSoundData;
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EXTERN_C SSoundData SoundData;
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void S9xSetEnvelopeRate (int channel, int32 rate_count, int32 xtarget);
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void S9xSetSoundVolume (int channel, short volume_left, short volume_right);
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void S9xSetMasterVolume (short volume_left, short volume_right);
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void S9xSetEchoVolume (short volume_left, short volume_right);
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void S9xSetEchoEnable (uint8 byte);
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void S9xSetEchoFeedback (int echo_feedback);
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void S9xSetEchoDelay (unsigned int byte);
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void S9xSetEchoWriteEnable (uint8 byte);
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void S9xSetFrequencyModulationEnable (uint8 byte);
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void S9xSetSoundKeyOff (int channel);
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void S9xPrepareSoundForSnapshotSave (bool8 restore);
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void S9xFixSoundAfterSnapshotLoad (int version);
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void S9xSetFilterCoefficient (int tap, int value);
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void S9xSetSoundADSR (int channel, int ar, int dr, int sr, int sl);
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void S9xSetEnvelopeHeight (int channel, int32 xlevel);
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uint8 S9xGetEnvelopeHeight (int channel);
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void S9xSetSoundHertz (int channel, int hertz);
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void S9xSetSoundType (int channel, int type_of_sound);
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bool8 S9xSetSoundMute (bool8 mute);
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void S9xResetSound (bool8 full);
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void S9xSetPlaybackRate (uint32 playback_rate);
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bool8 S9xSetSoundMode (int channel, int mode);
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void S9xSetSoundControl (int sound_switch);
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void S9xPlaySample (int channel);
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void S9xFixEnvelope (int channel, uint8 gain, uint8 adsr1, uint8 adsr2);
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bool8 S9xOpenSoundDevice (int mode, bool8 stereo, int buffer_size);
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EXTERN_C void S9xMixSamples (uint8 *buffer, int sample_count);
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EXTERN_C void S9xMixSamplesO (uint8 *buffer, int sample_count, int byte_offset);
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#endif
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