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/*
* softoss.h - Definitions for Software MIDI Synthesizer.
*/
/*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*/
/*
* Sequencer mode1 timer calls made by sequencer.c
*/
extern int (*softsynthp) (int cmd, int parm1, int parm2, unsigned long parm3);
#define SSYN_START 1
#define SSYN_REQUEST 2 /* parm1 = time */
#define SSYN_STOP 3
#define SSYN_GETTIME 4 /* Returns number of ticks since reset */
#define MAX_PATCH 256
#define MAX_SAMPLE 512
#define MAX_VOICE 32
#define DEFAULT_VOICES 16
typedef struct voice_info
{
/*
* Don't change anything in the beginning of this struct. These fields are used
* by the resampling loop which may have been written in assembly for some
* architectures. Any change may make the resampling code incompatible
*/
int instr;
short *wave;
struct patch_info *sample;
unsigned int ptr; int step; /* Pointer to the wave data and pointer increment */
int mode;
int startloop, startbackloop, endloop, looplen;
unsigned int leftvol, rightvol;
/***** Don't change anything above this */
volatile unsigned long orig_freq, current_freq;
volatile int bender, bender_range, panning;
volatile int main_vol, expression_vol, patch_vol, velocity;
/* Envelope parameters */
int envelope_phase;
volatile int envelope_vol;
volatile int envelope_volstep;
int envelope_time; /* Number of remaining envelope steps */
unsigned int envelope_target;
int percussive_voice;
int sustain_mode; /* 0=off, 1=sustain on, 2=sustain on+key released */
/* Vibrato */
int vibrato_rate;
int vibrato_depth;
int vibrato_phase;
int vibrato_step;
int vibrato_level;
/* Tremolo */
int tremolo_rate;
int tremolo_depth;
int tremolo_phase;
int tremolo_step;
int tremolo_level;
} voice_info;
extern voice_info softoss_voices[MAX_VOICE]; /* Voice spesific info */
typedef struct softsyn_devc
{
/*
* Don't change anything in the beginning of this struct. These fields are used
* by the resampling loop which may have been written in assembly for some
* architectures. Any change may make the resampling code incompatible
*/
int maxvoice; /* # of voices to be processed */
int afterscale;
int delay_size;
int control_rate, control_counter;
/***** Don't change anything above this */
int ram_size;
int ram_used;
int synthdev;
int timerdev;
int sequencer_mode;
/*
* Audio parameters
*/
int audiodev;
int audio_opened;
int speed;
int channels;
int bits;
int default_max_voices;
int max_playahead;
struct file finfo;
int fragsize;
int samples_per_fragment;
/*
* Sample storage
*/
int nrsamples;
struct patch_info *samples[MAX_SAMPLE];
short *wave[MAX_SAMPLE];
/*
* Programs
*/
int programs[MAX_PATCH];
/*
* Timer parameters
*/
volatile unsigned long usecs;
volatile unsigned long usecs_per_frag;
volatile unsigned long next_event_usecs;
/*
* Engine state
*/
volatile int engine_state;
#define ES_STOPPED 0
#define ES_STARTED 1
/* Voice spesific bitmaps */
volatile int tremolomap;
volatile int vibratomap;
} softsyn_devc;
void softsynth_resample_loop(short *buf, int loops);
extern void softsyn_control_loop(void);
#define DELAY_SIZE 4096
#ifdef SOFTSYN_MAIN
short voice_active[MAX_VOICE] = {0};
voice_info softoss_voices[MAX_VOICE] = {{0}}; /* Voice spesific info */
int left_delay[DELAY_SIZE]={0}, right_delay[DELAY_SIZE]={0};
int delayp=0;
#else
extern softsyn_devc *devc;
extern int left_delay[DELAY_SIZE], right_delay[DELAY_SIZE];
extern int delayp;
extern short voice_active[MAX_VOICE];
#endif
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