Added NSF decoder plugin. Fixes 151192.

Original commit message from CVS:
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.

1 files changed, 354 insertions, 0 deletions

diff --git a/gst/nsf/nes_apu.h b/gst/nsf/nes_apu.h
new file mode 100644
index 00000000..fd94798d
--- /dev/null
+++ b/gst/nsf/nes_apu.h
@@ -0,0 +1,354 @@
+/*
+** 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.
+**
+**
+** nes_apu.h
+**
+** NES APU emulation header file
+** $Id$
+*/
+
+#ifndef _NES_APU_H_
+#define _NES_APU_H_
+
+#ifdef __GNUC__
+#define  INLINE      static inline
+#elif defined(WIN32)
+#define  INLINE      static __inline
+#else
+#define  INLINE      static
+#endif
+
+/* define this for realtime generated noise */
+#define  REALTIME_NOISE
+
+#define  APU_WRA0       0x4000
+#define  APU_WRA1       0x4001
+#define  APU_WRA2       0x4002
+#define  APU_WRA3       0x4003
+#define  APU_WRB0       0x4004
+#define  APU_WRB1       0x4005
+#define  APU_WRB2       0x4006
+#define  APU_WRB3       0x4007
+#define  APU_WRC0       0x4008
+#define  APU_WRC2       0x400A
+#define  APU_WRC3       0x400B
+#define  APU_WRD0       0x400C
+#define  APU_WRD2       0x400E
+#define  APU_WRD3       0x400F
+#define  APU_WRE0       0x4010
+#define  APU_WRE1       0x4011
+#define  APU_WRE2       0x4012
+#define  APU_WRE3       0x4013
+
+#define  APU_OAMDMA     0x4014
+#define  APU_SMASK      0x4015
+#define  APU_JOY0       0x4016
+#define  APU_JOY1       0x4017
+
+/* length of generated noise */
+#define  APU_NOISE_32K  0x7FFF
+#define  APU_NOISE_93   93
+
+#define  APU_BASEFREQ   (NES_MASTER_CLOCK / 12)
+
+/* to/from 16.16 fixed point */
+#define  APU_TO_FIXED(x)    ((x) << 16)
+#define  APU_FROM_FIXED(x)  ((x) >> 16)
+
+
+/* channel structures */
+/* As much data as possible is precalculated,
+** to keep the sample processing as lean as possible
+*/
+ 
+typedef struct rectangle_s
+{
+   uint8 regs[4];
+
+   boolean enabled;
+   
+   int32 phaseacc;
+   int32 freq;
+   int32 output_vol;
+   boolean fixed_envelope;
+   boolean holdnote;
+   uint8 volume;
+
+   int32 sweep_phase;
+   int32 sweep_delay;
+   boolean sweep_on;
+   uint8 sweep_shifts;
+   uint8 sweep_length;
+   boolean sweep_inc;
+   int32 freq_limit;
+
+   int32 env_phase;
+   int32 env_delay;
+   uint8 env_vol;
+
+   int vbl_length;
+   uint8 adder;
+   int duty_flip;
+} rectangle_t;
+
+/*
+enum
+{
+   COUNTMODE_LOAD,
+   COUNTMODE_COUNT
+};
+*/
+
+typedef struct triangle_s
+{
+   uint8 regs[3];
+
+   boolean enabled;
+
+   int32 freq;
+   int32 phaseacc;
+   int32 output_vol;
+
+   uint8 adder;
+
+   boolean holdnote;
+   boolean counter_started;
+   /* quasi-hack */
+   int write_latency;
+
+  /* boolean countmode; */
+
+   int vbl_length;
+   int linear_length;
+
+} triangle_t;
+
+
+typedef struct noise_s
+{
+   uint8 regs[3];
+
+   boolean enabled;
+
+   int32 freq;
+   int32 phaseacc;
+   int32 output_vol;
+
+   int32 env_phase;
+   int32 env_delay;
+   uint8 env_vol;
+   boolean fixed_envelope;
+   boolean holdnote;
+
+   uint8 volume;
+
+   int vbl_length;
+
+#ifdef REALTIME_NOISE
+   uint8 xor_tap;
+#else
+   boolean short_sample;
+   int cur_pos;
+#endif /* REALTIME_NOISE */
+} noise_t;
+
+typedef struct dmc_s
+{
+   uint8 regs[4];
+
+   /* bodge for timestamp queue */
+   boolean enabled;
+   
+   int32 freq;
+   int32 phaseacc;
+   int32 output_vol;
+
+   uint32 address;
+   uint32 cached_addr;
+   int dma_length;
+   int cached_dmalength;
+   uint8 cur_byte;
+
+   boolean looping;
+   boolean irq_gen;
+   boolean irq_occurred;
+
+} dmc_t;
+
+enum
+{
+   APU_FILTER_NONE,
+   APU_FILTER_LOWPASS,
+   APU_FILTER_WEIGHTED
+};
+
+typedef struct
+{
+   uint32 min_range, max_range;
+   uint8 (*read_func)(uint32 address);
+} apu_memread;
+
+typedef struct
+{
+   uint32 min_range, max_range;
+   void (*write_func)(uint32 address, uint8 value);
+} apu_memwrite;
+
+/* external sound chip stuff */
+typedef struct apuext_s
+{
+   void  (*init)(void);
+   void  (*shutdown)(void);
+   void  (*reset)(void);
+   int32 (*process)(void);
+   apu_memread *mem_read;
+   apu_memwrite *mem_write;
+} apuext_t;
+
+
+/* APU queue structure */
+#define  APUQUEUE_SIZE  4096
+#define  APUQUEUE_MASK  (APUQUEUE_SIZE - 1)
+
+/* apu ring buffer member */
+typedef struct apudata_s
+{
+   uint32 timestamp, address;
+   uint8 value;
+} apudata_t;
+
+
+typedef struct apu_s
+{
+   rectangle_t rectangle[2];
+   triangle_t triangle;
+   noise_t noise;
+   dmc_t dmc;
+   uint8 enable_reg;
+
+   apudata_t queue[APUQUEUE_SIZE];
+   int q_head, q_tail;
+   uint32 elapsed_cycles;
+
+   void *buffer; /* pointer to output buffer */
+   int num_samples;
+
+   boolean mix_enable[6];
+   int filter_type;
+
+   int32 cycle_rate;
+
+   int sample_rate;
+   int sample_bits;
+   int refresh_rate;
+
+   void (*process)(void *buffer, int num_samples);
+
+   /* external sound chip */
+   apuext_t *ext;
+} apu_t;
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Function prototypes */
+extern apu_t *apu_create(int sample_rate, int refresh_rate, int sample_bits, boolean stereo);
+extern void apu_destroy(apu_t *apu);
+extern void apu_setext(apu_t *apu, apuext_t *ext);
+extern void apu_setfilter(int filter_type);
+extern void apu_process(void *buffer, int num_samples);
+extern void apu_reset(void);
+extern void apu_setchan(int chan, boolean enabled);
+extern int32 apu_getcyclerate(void);
+extern apu_t *apu_getcontext(void);
+
+extern uint8 apu_read(uint32 address);
+extern void apu_write(uint32 address, uint8 value);
+
+/* for visualization */
+extern void apu_getpcmdata(void **data, int *num_samples, int *sample_bits);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _NES_APU_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 1.12  2000/07/04 04:54:48  matt
+** minor changes that helped with MAME
+**
+** Revision 1.11  2000/07/03 02:18:53  matt
+** much better external module exporting
+**
+** Revision 1.10  2000/06/26 05:00:37  matt
+** cleanups
+**
+** Revision 1.9  2000/06/23 03:29:28  matt
+** cleaned up external sound inteface
+**
+** Revision 1.8  2000/06/20 04:06:16  matt
+** migrated external sound definition to apu module
+**
+** Revision 1.7  2000/06/20 00:07:35  matt
+** added convenience members to apu_t struct
+**
+** Revision 1.6  2000/06/09 16:49:02  matt
+** removed all floating point from sound generation
+**
+** Revision 1.5  2000/06/09 15:12:28  matt
+** initial revision
+**
+*/