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a4d0dacec2
Original commit message from CVS: Patch by: Andreas Henriksson <andreas at fatal dot set> * 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/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: Update our internal nosefart to nosefart-2.7-mls to fix segfaults on some files. Fixes bug #498237. Remove some // comments, fix some compiler warnings and use pow() instead of a slow, selfmade implementation.
366 lines
7.5 KiB
C
366 lines
7.5 KiB
C
/*
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** Nofrendo (c) 1998-2000 Matthew Conte (matt@conte.com)
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**
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of version 2 of the GNU Library General
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** Public License as published by the Free Software Foundation.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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** Library General Public License for more details. To obtain a
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** copy of the GNU Library General Public License, write to the Free
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** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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** Any permitted reproduction of these routines, in whole or in part,
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** must bear this legend.
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**
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**
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** nes_apu.h
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**
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** NES APU emulation header file
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** $Id$
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*/
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#ifndef _NES_APU_H_
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#define _NES_APU_H_
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#ifdef __GNUC__
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#define INLINE static inline
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#elif defined(WIN32)
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#define INLINE static __inline
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#else
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#define INLINE static
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#endif
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/* define this for realtime generated noise */
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#define REALTIME_NOISE
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#define APU_WRA0 0x4000
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#define APU_WRA1 0x4001
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#define APU_WRA2 0x4002
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#define APU_WRA3 0x4003
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#define APU_WRB0 0x4004
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#define APU_WRB1 0x4005
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#define APU_WRB2 0x4006
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#define APU_WRB3 0x4007
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#define APU_WRC0 0x4008
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#define APU_WRC2 0x400A
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#define APU_WRC3 0x400B
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#define APU_WRD0 0x400C
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#define APU_WRD2 0x400E
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#define APU_WRD3 0x400F
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#define APU_WRE0 0x4010
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#define APU_WRE1 0x4011
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#define APU_WRE2 0x4012
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#define APU_WRE3 0x4013
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#define APU_OAMDMA 0x4014
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#define APU_SMASK 0x4015
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#define APU_JOY0 0x4016
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#define APU_JOY1 0x4017
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/* length of generated noise */
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#define APU_NOISE_32K 0x7FFF
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#define APU_NOISE_93 93
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#define APU_BASEFREQ (NES_MASTER_CLOCK / 12)
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/* to/from 16.16 fixed point */
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#define APU_TO_FIXED(x) ((x) << 16)
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#define APU_FROM_FIXED(x) ((x) >> 16)
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/* channel structures */
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/* As much data as possible is precalculated,
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** to keep the sample processing as lean as possible
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*/
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typedef struct rectangle_s
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{
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uint8 regs[4];
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boolean enabled;
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int32 phaseacc;
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int32 freq;
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int32 output_vol;
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boolean fixed_envelope;
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boolean holdnote;
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uint8 volume;
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int32 sweep_phase;
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int32 sweep_delay;
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boolean sweep_on;
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uint8 sweep_shifts;
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uint8 sweep_length;
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boolean sweep_inc;
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int32 freq_limit;
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int32 env_phase;
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int32 env_delay;
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uint8 env_vol;
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int vbl_length;
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uint8 adder;
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int duty_flip;
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} rectangle_t;
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/*
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enum
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{
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COUNTMODE_LOAD,
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COUNTMODE_COUNT
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};
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*/
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typedef struct triangle_s
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{
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uint8 regs[3];
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boolean enabled;
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int32 freq;
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int32 phaseacc;
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int32 output_vol;
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uint8 adder;
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boolean holdnote;
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boolean counter_started;
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/* quasi-hack */
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int write_latency;
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/* boolean countmode; */
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int vbl_length;
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int linear_length;
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} triangle_t;
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typedef struct noise_s
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{
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uint8 regs[3];
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boolean enabled;
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int32 freq;
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int32 phaseacc;
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int32 output_vol;
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int32 env_phase;
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int32 env_delay;
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uint8 env_vol;
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boolean fixed_envelope;
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boolean holdnote;
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uint8 volume;
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int vbl_length;
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#ifdef REALTIME_NOISE
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uint8 xor_tap;
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#else
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boolean short_sample;
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int cur_pos;
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#endif /* REALTIME_NOISE */
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} noise_t;
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typedef struct dmc_s
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{
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uint8 regs[4];
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/* bodge for timestamp queue */
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boolean enabled;
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int32 freq;
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int32 phaseacc;
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int32 output_vol;
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uint32 address;
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uint32 cached_addr;
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int dma_length;
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int cached_dmalength;
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uint8 cur_byte;
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boolean looping;
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boolean irq_gen;
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boolean irq_occurred;
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} dmc_t;
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enum
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{
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APU_FILTER_NONE,
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APU_FILTER_LOWPASS,
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APU_FILTER_WEIGHTED
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};
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typedef struct
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{
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uint32 min_range, max_range;
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uint8 (*read_func)(uint32 address);
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} apu_memread;
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typedef struct
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{
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uint32 min_range, max_range;
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void (*write_func)(uint32 address, uint8 value);
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} apu_memwrite;
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/* external sound chip stuff */
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typedef struct apuext_s
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{
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void (*init)(void);
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void (*shutdown)(void);
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void (*reset)(void);
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int32 (*process)(void);
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apu_memread *mem_read;
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apu_memwrite *mem_write;
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} apuext_t;
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/* APU queue structure */
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#define APUQUEUE_SIZE 4096
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#define APUQUEUE_MASK (APUQUEUE_SIZE - 1)
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/* apu ring buffer member */
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typedef struct apudata_s
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{
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uint32 timestamp, address;
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uint8 value;
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} apudata_t;
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typedef struct apu_s
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{
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rectangle_t rectangle[2];
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triangle_t triangle;
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noise_t noise;
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dmc_t dmc;
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uint8 enable_reg;
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apudata_t queue[APUQUEUE_SIZE];
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int q_head, q_tail;
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uint32 elapsed_cycles;
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void *buffer; /* pointer to output buffer */
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int num_samples;
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int mix_enable; /* $$$ben : should improve emulation */
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int filter_type;
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int32 cycle_rate;
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int sample_rate;
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int sample_bits;
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int refresh_rate;
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void (*process)(void *buffer, int num_samples);
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/* $$$ ben : last error string */
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const char * errstr;
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/* external sound chip */
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apuext_t *ext;
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} apu_t;
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* Function prototypes */
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extern apu_t *apu_create(int sample_rate, int refresh_rate, int sample_bits, boolean stereo);
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extern void apu_destroy(apu_t *apu);
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extern int apu_setext(apu_t *apu, apuext_t *ext);
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extern int apu_setfilter(int filter_type);
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extern void apu_process(void *buffer, int num_samples);
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extern void apu_reset(void);
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extern int apu_setchan(int chan, boolean enabled);
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extern int32 apu_getcyclerate(void);
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extern apu_t *apu_getcontext(void);
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extern uint8 apu_read(uint32 address);
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extern void apu_write(uint32 address, uint8 value);
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/* for visualization */
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extern void apu_getpcmdata(void **data, int *num_samples, int *sample_bits);
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/* FIXME: added while importing for GStreamer */
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void apu_setcontext(apu_t *src_apu);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _NES_APU_H_ */
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/*
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** $Log$
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** Revision 1.2 2008/03/25 15:56:12 slomo
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** Patch by: Andreas Henriksson <andreas at fatal dot set>
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** * gst/nsf/Makefile.am:
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** * gst/nsf/dis6502.h:
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** * gst/nsf/fds_snd.c:
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** * gst/nsf/fds_snd.h:
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** * gst/nsf/fmopl.c:
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** * gst/nsf/fmopl.h:
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** * gst/nsf/gstnsf.c:
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** * gst/nsf/log.c:
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** * gst/nsf/log.h:
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** * gst/nsf/memguard.c:
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** * gst/nsf/memguard.h:
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** * gst/nsf/mmc5_snd.c:
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** * gst/nsf/mmc5_snd.h:
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** * gst/nsf/nes6502.c:
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** * gst/nsf/nes6502.h:
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** * gst/nsf/nes_apu.c:
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** * gst/nsf/nes_apu.h:
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** * gst/nsf/nsf.c:
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** * gst/nsf/nsf.h:
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** * gst/nsf/osd.h:
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** * gst/nsf/types.h:
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** * gst/nsf/vrc7_snd.c:
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** * gst/nsf/vrc7_snd.h:
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** * gst/nsf/vrcvisnd.c:
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** * gst/nsf/vrcvisnd.h:
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** Update our internal nosefart to nosefart-2.7-mls to fix segfaults
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** on some files. Fixes bug #498237.
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** Remove some // comments, fix some compiler warnings and use pow()
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** instead of a slow, selfmade implementation.
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**
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** Revision 1.2 2003/04/09 14:50:32 ben
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** Clean NSF api.
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**
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** Revision 1.1 2003/04/08 20:53:01 ben
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** Adding more files...
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**
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** Revision 1.12 2000/07/04 04:54:48 matt
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** minor changes that helped with MAME
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**
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** Revision 1.11 2000/07/03 02:18:53 matt
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** much better external module exporting
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**
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** Revision 1.10 2000/06/26 05:00:37 matt
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** cleanups
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**
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** Revision 1.9 2000/06/23 03:29:28 matt
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** cleaned up external sound inteface
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**
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** Revision 1.8 2000/06/20 04:06:16 matt
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** migrated external sound definition to apu module
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**
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** Revision 1.7 2000/06/20 00:07:35 matt
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** added convenience members to apu_t struct
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**
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** Revision 1.6 2000/06/09 16:49:02 matt
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** removed all floating point from sound generation
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**
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** Revision 1.5 2000/06/09 15:12:28 matt
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** initial revision
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**
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*/
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