drivers/sound/softoss.h

   1 /*
   2  * softoss.h    - Definitions for Software MIDI Synthesizer.
   3  */
   4 /*
   5  * Copyright (C) by Hannu Savolainen 1993-1997
   6  *
   7  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
   8  * Version 2 (June 1991). See the "COPYING" file distributed with this software
   9  * for more info.
  10  */
  11
  12
  13 /*
  14  * Sequencer mode1 timer calls made by sequencer.c
  15  */
  16 extern int (*softsynthp) (int cmd, int parm1, int parm2, unsigned long parm3);
  17
  18 #define SSYN_START      1
  19 #define SSYN_REQUEST    2       /* parm1 = time */
  20 #define SSYN_STOP       3
  21 #define SSYN_GETTIME    4       /* Returns number of ticks since reset */
  22
  23 #define MAX_PATCH 256
  24 #define MAX_SAMPLE 512
  25 #define MAX_VOICE 32
  26 #define DEFAULT_VOICES 16
  27
  28 typedef struct voice_info
  29 {
  30 /*
  31  * Don't change anything in the beginning of this struct. These fields are used
  32  * by the resampling loop which may have been written in assembly for some
  33  * architectures. Any change may make the resampling code incompatible
  34  */
  35   int instr;
  36   short *wave;
  37   struct patch_info *sample;
  38
  39   unsigned int ptr; int step; /* Pointer to the wave data and pointer increment */
  40
  41   int mode;
  42   int startloop, startbackloop, endloop, looplen;
  43
  44   unsigned int leftvol, rightvol;
  45 /***** Don't change anything above this */
  46
  47   volatile unsigned long orig_freq, current_freq;
  48   volatile int bender, bender_range, panning;
  49   volatile int main_vol, expression_vol, patch_vol, velocity;
  50
  51 /* Envelope parameters */
  52
  53   int envelope_phase;
  54   volatile int envelope_vol;
  55   volatile int envelope_volstep;
  56   int envelope_time; /* Number of remaining envelope steps */
  57   unsigned int envelope_target;
  58   int percussive_voice;
  59   int sustain_mode; /* 0=off, 1=sustain on, 2=sustain on+key released */
  60
  61 /*      Vibrato */
  62   int vibrato_rate;
  63   int vibrato_depth;
  64   int vibrato_phase;
  65   int vibrato_step;
  66   int vibrato_level;
  67
  68 /*      Tremolo */
  69   int tremolo_rate;
  70   int tremolo_depth;
  71   int tremolo_phase;
  72   int tremolo_step;
  73   int tremolo_level;
  74 } voice_info;
  75
  76 extern voice_info softoss_voices[MAX_VOICE]; /* Voice spesific info */
  77
  78 typedef struct softsyn_devc
  79 {
  80 /*
  81  * Don't change anything in the beginning of this struct. These fields are used
  82  * by the resampling loop which may have been written in assembly for some
  83  * architectures. Any change may make the resampling code incompatible
  84  */
  85         int maxvoice;           /* # of voices to be processed */
  86         int afterscale;
  87         int delay_size;
  88         int control_rate, control_counter;
  89 /***** Don't change anything above this */
  90
  91         int ram_size;
  92         int ram_used;
  93
  94         int synthdev;
  95         int timerdev;
  96         int sequencer_mode;
  97 /*
  98  *      Audio parameters
  99  */
 100
 101         int audiodev;
 102         int audio_opened;
 103         int speed;
 104         int channels;
 105         int bits;
 106         int default_max_voices;
 107         int max_playahead;
 108         struct file finfo;
 109         int fragsize;
 110         int samples_per_fragment;
 111
 112 /*
 113  *      Sample storage
 114  */
 115         int nrsamples;
 116         struct patch_info *samples[MAX_SAMPLE];
 117         short *wave[MAX_SAMPLE];
 118
 119 /*
 120  *      Programs
 121  */
 122         int programs[MAX_PATCH];
 123
 124 /*
 125  *      Timer parameters
 126  */
 127         volatile unsigned long usecs;
 128         volatile unsigned long usecs_per_frag;
 129         volatile unsigned long next_event_usecs;
 130
 131 /*
 132  *      Engine state
 133  */
 134
 135         volatile int engine_state;
 136 #define ES_STOPPED                      0
 137 #define ES_STARTED                      1
 138
 139         /* Voice spesific bitmaps */
 140         volatile int tremolomap;
 141         volatile int vibratomap;
 142
 143 } softsyn_devc;
 144
 145 void softsynth_resample_loop(short *buf, int loops);
 146 extern void softsyn_control_loop(void);
 147
 148 #define DELAY_SIZE      4096
 149
 150 #ifdef SOFTSYN_MAIN
 151   short voice_active[MAX_VOICE] = {0};
 152   voice_info softoss_voices[MAX_VOICE] = {{0}}; /* Voice spesific info */
 153   int left_delay[DELAY_SIZE]={0}, right_delay[DELAY_SIZE]={0};
 154   int delayp=0;
 155 #else
 156   extern softsyn_devc *devc;
 157
 158   extern int left_delay[DELAY_SIZE], right_delay[DELAY_SIZE];
 159   extern int delayp;
 160   extern short voice_active[MAX_VOICE];
 161 #endif