1 | /* SCCSID = %W% %E% */
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2 | /****************************************************************************
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3 | * *
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4 | * Copyright (c) IBM Corporation 1994 - 1997. *
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5 | * Copyright (c) Voyetra Technologies 1990-1993. All rights reserved *
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6 | * *
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7 | * The following IBM OS/2 source code is provided to you solely for the *
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8 | * the purpose of assisting you in your development of OS/2 device drivers. *
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9 | * You may use this code in accordance with the IBM License Agreement *
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10 | * provided in the IBM Device Driver Source Kit for OS/2. *
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11 | * *
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12 | ****************************************************************************/
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13 | /**@internal %W%
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14 | * General purpose #define's for FMSYNTH.
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15 | * @version %I%
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16 | * @context
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17 | * Unless otherwise noted, all interfaces are Ring-0, 16-bit, kernel stack.
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18 | * @notes
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19 | * @history
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20 | */
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21 |
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22 | #ifndef ADLIB_INCLUDED
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23 | #define ADLIB_INCLUDED
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24 |
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25 | #define MAX_NUMBER_OF_OPERATORS 14 // 6 vx, 5 drum, 3 2op
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26 | #define MAX_NUMBER_OF_VOICES 14
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27 | #define NUMBER_OF_CHANNELS 16
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28 | #define NUMBER_OF_BUILT_IN_VOICES 128
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29 | #define DEF_PERCUSSION_CHANNEL (16-1)
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30 | #define PERCUSSION_CHANNEL percussion_channel
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31 | #define DEF_PERC_MODE 1
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32 | #define MIN_PGM_FOR_CTRL 126
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33 |
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34 | #define BD (6 + 3)
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35 | #define SD (7 + 3)
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36 | #define TOM (8 + 3)
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37 | #define CYMB (9 + 3)
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38 | #define HIHAT (10 +3)
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39 |
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40 | #define DRUM_PATCH_OFFSET 128
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41 |
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42 | /* long cur_bender[] is calc-ed so that 2048 * NR_STEP_PITCH is one half step */
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43 | #define NR_STEP_PITCH 25 /* 25 steps within a half-tone for pitch bend */
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44 |
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45 | /* Parameters of each voice: */
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46 | #define nbLocParam 5
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47 | #define OLD_LOC_PARAM 14
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48 |
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49 | #define prmKsl 1
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50 | #define prmLevel 1
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51 | #define prmWaveSel 4 /* wave select */
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52 | #define prmFm 4
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53 | #define prmFeedBack prmFm /* use for opr. 0 only */
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54 |
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55 | #define MAX_VOLUME 0x7f
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56 | #define MAX_PITCH 0x3fff
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57 | #define MID_PITCH 0x2000
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58 |
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59 | #define MID_C 60 /* MIDI standard mid C */
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60 | #define CHIP_MID_C 48 /* sound chip mid C */
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61 | #define NR_NOTES 96 /* # of notes we can play on chip */
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62 |
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63 | #define MAX_MELO_MODE_VX 5 // 0..8
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64 | #define MAX_PERC_MODE_VX 5 // 0..5
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65 |
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66 | #define NUM_SLOTS_CHIP 36 /* OPL3 looks like 2 ADLIB chips */
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67 | #define NUMBER_OF_OPERATORS_CHIP 6
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68 | #define NUM_SLOTS_HALF 18
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69 |
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70 | #define MODE_MELO 0 // 9 VX MELODIC MODE (MAY BE STEREO)
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71 | #define MODE_PERC 1 // PERC MODE
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72 |
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73 | #define TOT_SLOTS (NUM_SLOTS_CHIP) /* number of raw voice slots on card */
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74 |
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75 | /**************** MISC DEFINED FOR FM CHIPS *****************/
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76 | #define MY_BEST_BD_PITCH CHIP_MID_C
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77 |
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78 | #define PATCH_NAME_LEN 16
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79 | #define PATCH_PAD_LEN 4
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80 | #define EXTRA_DATA_LENGTH 0
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81 | #define PATCH_LENGTH (4 * nbLocParam + EXTRA_DATA_LENGTH)
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82 | #define OLD_PATCH_LENGTH (4 * OLD_LOC_PARAM + PATCH_NAME_LEN + PATCH_PAD_LEN)
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83 |
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84 |
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85 | /*********** CHANNEL_ENTRY STRUCTURE *******************/
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86 | /*********** USED TO KEEP TRACK OF A MIDI CHANNEL ******/
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87 |
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88 | typedef struct
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89 | {
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90 | char program; // Last MIDI program change received on this channel
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91 | // Tells what timbre to use with next notes played on this channel
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92 | char volume; // Last MIDI volume message.
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93 | unsigned bender; // Last pitch bend message. Used to determine note pitches
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94 | char pan; // Last MIDI pan message value
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95 | char sus_pedal; // Current state of the Damper (sustenuto) pedal
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96 | } CHANNEL_ENTRY;
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97 |
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98 | /********* VOICE_STATUS_ENTRY STRUCTURE *******************/
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99 | /* NOTE: in this case, a voice is:
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100 | * a 4 op combination in the 2 op driver
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101 | */
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102 | typedef struct
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103 | {
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104 | BYTE cur_pitch; // pitch, in midi note number, of this voice
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105 | BYTE cur_chan; // midi channel that triggered this voice.
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106 | // this is used often, especially by for_all_ops_on_channel,
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107 | // when you need to do something on a channel basis.
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108 | } VOICE_STATUS_ENTRY;
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109 |
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110 |
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111 | /********* STRUCTURE DEFINES FOR VOICE ALLOCATION FUNCTIONS **********/
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112 |
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113 | /* OFF_ENTRY STRUCTURE
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114 | *
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115 | * used to make pseudo linked lists from arrays
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116 | * these pseudo lists are character arrays where the character is
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117 | * the next array position in the list. There is no data stored
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118 | * in the list, as the array position is the data.
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119 | */
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120 | typedef struct
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121 | {
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122 | signed char next;
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123 | } OFF_ENTRY;
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124 |
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125 | typedef struct
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126 | {
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127 | int freelist;
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128 | int usedlist;
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129 | int usedcount;
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130 | int lastused;
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131 | OFF_ENTRY * data;
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132 | VOICE_STATUS_ENTRY * op_stats;
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133 | } ALLOC_Q, near * NPALLOC_Q;
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134 |
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135 | /***************** DERIVE DEFINE FROM DRUM_PATCH_LEN *************/
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136 |
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137 | #define DRUM_PATCH_LEN (2 * nbLocParam)
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138 |
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139 | // Constants used by for_all_ops_on_chan() to select function.
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140 | #define ID_do_handle_pitch_bend 1
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141 | #define ID_shut_off_chan_voice 2
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142 | #define ID_do_sus_off 3
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143 |
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144 | #endif // ADLIB_INCLUDED
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145 |
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