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Diffstat (limited to 'gst/nsf/nsf.h')
| -rw-r--r-- | gst/nsf/nsf.h | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/gst/nsf/nsf.h b/gst/nsf/nsf.h new file mode 100644 index 00000000..2f960367 --- /dev/null +++ b/gst/nsf/nsf.h @@ -0,0 +1,173 @@ +/* +** Nofrendo (c) 1998-2000 Matthew Conte (matt@conte.com) +** +** +** This program is free software; you can redistribute it and/or +** modify it under the terms of version 2 of the GNU Library General +** Public License as published by the Free Software Foundation. +** +** This program 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 +** Library General Public License for more details. To obtain a +** copy of the GNU Library General Public License, write to the Free +** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +** +** Any permitted reproduction of these routines, in whole or in part, +** must bear this legend. +** +** +** nsf.h +** +** NSF loading/saving related defines / prototypes +** $Id$ +*/ + +#ifndef _NSF_H_ +#define _NSF_H_ + +#include "osd.h" +#include "nes6502.h" +#include "nes_apu.h" + +#define NSF_MAGIC "NESM\x1A" + +#define NSF_DEDICATED_PAL 0x01 +#define NSF_DUAL_PAL_NTSC 0x02 + +#define EXT_SOUND_NONE 0x00 +#define EXT_SOUND_VRCVI 0x01 +#define EXT_SOUND_VRCVII 0x02 +#define EXT_SOUND_FDS 0x04 +#define EXT_SOUND_MMC5 0x08 +#define EXT_SOUND_NAMCO106 0x10 +#define EXT_SOUND_SUNSOFT_FME07 0x20 +/* bits 6,7: future expansion */ + +#define NSF_HEADER_SIZE 0x80 + +/* 60 Hertz refresh (NTSC) */ +#define NES_MASTER_CLOCK 21477272.7272 +#define NTSC_REFRESH 60 +#define NTSC_SUBCARRIER_DIV 12 +#define NTSC_SCANLINES 262 + +#define NES_FRAME_CYCLES ((NES_MASTER_CLOCK / NTSC_SUBCARRIER_DIV) / NTSC_REFRESH) +#define NES_SCANLINE_CYCLES (NES_FRAME_CYCLES / NTSC_SCANLINES) + +/* filter levels */ +enum +{ + NSF_FILTER_NONE, + NSF_FILTER_LOWPASS, + NSF_FILTER_WEIGHTED +}; + +typedef struct nsf_s +{ + /* NESM header */ + uint8 id[5] ; /* NESM\x1A */ + uint8 version ; /* spec version */ + uint8 num_songs ; /* total num songs */ + uint8 start_song ; /* first song */ + uint16 load_addr __PACKED__; /* loc to load code */ + uint16 init_addr __PACKED__; /* init call address */ + uint16 play_addr __PACKED__; /* play call address */ + uint8 song_name[32] ; /* name of song */ + uint8 artist_name[32] ; /* artist name */ + uint8 copyright[32] ; /* copyright info */ + uint16 ntsc_speed __PACKED__; /* playback speed (if NTSC) */ + uint8 bankswitch_info[8] ; /* initial code banking */ + uint16 pal_speed __PACKED__; /* playback speed (if PAL) */ + uint8 pal_ntsc_bits ; /* NTSC/PAL determination bits */ + uint8 ext_sound_type ; /* type of external sound gen. */ + uint8 reserved[4] ; /* reserved */ + + /* things that the NSF player needs */ + uint8 *data; /* actual NSF data */ + uint32 length; /* length of data */ + uint32 playback_rate; /* current playback rate */ + uint8 current_song; /* current song */ + boolean bankswitched; /* is bankswitched? */ + + /* CPU and APU contexts */ + nes6502_context *cpu; + apu_t *apu; + + /* our main processing routine, calls all external mixing routines */ + void (*process)(void *buffer, int num_samples); +} nsf_t; + +/* Function prototypes */ +extern void nsf_init(void); + +extern nsf_t *nsf_load(char *filename, void *source, int length); +extern void nsf_free(nsf_t **nsf_info); + +extern void nsf_playtrack(nsf_t *nsf, int track, int sample_rate, int sample_bits, + boolean stereo); +extern void nsf_frame(nsf_t *nsf); +extern void nsf_setchan(nsf_t *nsf, int chan, boolean enabled); +extern void nsf_setfilter(nsf_t *nsf, int filter_type); + +#endif /* _NSF_H_ */ + +/* +** $Log$ +** Revision 1.1 2006/07/13 15:07:28 wtay +** Based on patches by: Johan Dahlin <johan at gnome dot org> +** Ronald Bultje <rbultje at ronald dot bitfreak dot net> +** * configure.ac: +** * gst/nsf/Makefile.am: +** * gst/nsf/dis6502.h: +** * gst/nsf/fds_snd.c: +** * gst/nsf/fds_snd.h: +** * gst/nsf/fmopl.c: +** * gst/nsf/fmopl.h: +** * gst/nsf/gstnsf.c: +** * gst/nsf/gstnsf.h: +** * gst/nsf/log.c: +** * gst/nsf/log.h: +** * gst/nsf/memguard.c: +** * gst/nsf/memguard.h: +** * gst/nsf/mmc5_snd.c: +** * gst/nsf/mmc5_snd.h: +** * gst/nsf/nes6502.c: +** * gst/nsf/nes6502.h: +** * gst/nsf/nes_apu.c: +** * gst/nsf/nes_apu.h: +** * gst/nsf/nsf.c: +** * gst/nsf/nsf.h: +** * gst/nsf/osd.h: +** * gst/nsf/types.h: +** * gst/nsf/vrc7_snd.c: +** * gst/nsf/vrc7_snd.h: +** * gst/nsf/vrcvisnd.c: +** * gst/nsf/vrcvisnd.h: +** Added NSF decoder plugin. Fixes 151192. +** +** Revision 1.11 2000/07/04 04:59:24 matt +** removed DOS-specific stuff +** +** Revision 1.10 2000/07/03 02:19:36 matt +** dynamic address range handlers, cleaner and faster +** +** Revision 1.9 2000/06/23 03:27:58 matt +** cleaned up external sound inteface +** +** Revision 1.8 2000/06/20 04:04:37 matt +** moved external soundchip struct to apu module +** +** Revision 1.7 2000/06/20 00:05:45 matt +** changed to driver-based external sound generation +** +** Revision 1.6 2000/06/13 03:51:54 matt +** update API to take freq/sample data on nsf_playtrack +** +** Revision 1.5 2000/06/12 01:13:00 matt +** added CPU/APU as members of the nsf struct +** +** Revision 1.4 2000/06/09 15:12:26 matt +** initial revision +** +*/ |