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1 /*
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2 * miniJSS - Mixing device and channel handling
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2006-2012 Tecnic Software productions (TNSP)
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5 */
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6 #ifndef JSSMIX_H
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7 #define JSSMIX_H
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8 #include "jss.h"
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9
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10 //#define DBG(...) do { fprintf(stderr, __VA_ARGS__); } while (0)
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11 #define DBG(...) do { /* stub */ } while (0)
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12
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13
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14 // Mixing limits
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15 #define JVM_LIMIT_16_POS (32767)
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16 #define JVM_LIMIT_16_NEG (-32767)
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17 #define JVM_ADD_16 (32768)
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18
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19
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20 // A channel data structure
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21 typedef struct
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22 {
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23 DMFixedPoint
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24 chPos, // Current position in sample, 32:32 fixpoint
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25 chDeltaO; // Delta in 32:32 UNSIGNED! (chDirection)
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26
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27 int chFreq; // Frequency of sampel in Hz
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28 Uint32
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29 chSize, // Length of sample in UNITS
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30 chLoopS, // Loop start in UNITS
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31 chLoopE; // Loop end in UNITS
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32
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33 void *chData; // Pointer to data
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34
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35 BOOL chPlaying, // TRUE = playing
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36 chMute, // TRUE = muted
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37 chDirection; // TRUE = playing forwards, FALSE = backwards
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38
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39 int chFlags; // Flags
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40 int chVolume, // Volume
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41 chPanning; // Panning
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42
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43 Sint32 chPrevR, chPrevL;
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44 } JSSChannel;
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45
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46
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47 // Channel table
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48 typedef int JSSChannelTable[jsetNChannels];
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49
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50 typedef Sint32 JSSVolumeTable[256][256];
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51
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52
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53 // Virtual software mixer "device" structure
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54 typedef struct _JSSMixer JSSMixer;
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55
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56 struct _JSSMixer
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57 {
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58 int outFormat,
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59 outChannels,
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60 outFreq,
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61 globalVol;
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62 JSSChannel channels[jsetNChannels];
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63 JSSVolumeTable volTab8;
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64
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65 int addBufSize;
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66 Sint32 *addBuffer;
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67
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68 // Callback handling
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69 int cbFreq, cbCounter;
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70 void *cbData;
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71 void (*cbFunction)(void *, void *);
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72
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73 // Mixing routine pointers
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74 int (*jvmMixChannel_FW)(JSSMixer *, JSSChannel *, Sint32 *, const int, const Uint32);
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75 int (*jvmMixChannel_BW)(JSSMixer *, JSSChannel *, Sint32 *, const int, const Uint32);
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76 void (*jvmPostProcess)(Sint32 *, void *mixBuffer, int);
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77
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78 // Device locking
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79 #ifdef JSS_SUP_THREADS
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80 DMMutex *mutex;
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81 #endif
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82 };
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83
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84
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85 /* Enums
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86 */
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87 enum {
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88 JMIX_AUTO = 0,
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89 JMIX_C,
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90 JMIX_MMX,
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91 JMIX_SSE
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92 };
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93
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94
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95 /* Main routines
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96 */
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97 JSSMixer * jvmInit(const int outFormat, const int nChannels, const int outFreq, const int mixerID);
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98 int jvmClose(JSSMixer *mixer);
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99
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100 int jvmSetCallback(JSSMixer *mixer, void (*cbFunction)(void *, void *), void *cbData);
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101 void jvmRemoveCallback(JSSMixer *mixer);
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102 int jvmSetCallbackFreq(JSSMixer *mixer, const int cbFreq);
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103 Uint32 jvmGetLastCBBufPos(JSSMixer *mixer, const int cbHandle);
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104 Uint32 jvmGetNextCBBufPos(JSSMixer *mixer, const int cbHandle);
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105
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106 int jvmGetSampleSize(JSSMixer *mixer);
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107 int jvmGetSampleRes(JSSMixer *mixer);
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108
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109 void jvmRenderAudio(JSSMixer *mixer, void *mixBuffer, const int mixLength);
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110
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111
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112 /*
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113 int jvmAddCallback(JSSMixer *mixer, void (*cbFunction)(JSSMixer *, void *));
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114 int jvmRemoveCallback(JSSMixer *mixer, int cbHandle);
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115 int jvmSetCallbackFreq(JSSMixer *mixer, int cbHandle, int cbFreq);
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116
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117 int jvmAllocChannels(JSSMixer *mixer, int nChannels);
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118 int jvmFreeChannels(JSSMixer *mixer, int iHandle);
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119 int jvmGetChannelTable(JSSMixer *mixer, int iHandle, JSSChannelTable *pTable);
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120 */
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121
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122
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123 /* Channel manipulation routines
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124 */
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125 void jvmPlay(JSSMixer *mixer, const int channel);
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126 void jvmStop(JSSMixer *mixer, const int channel);
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127
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128 void jvmSetSample(JSSMixer *mixer, const int channel,
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129 void *data, const Uint32 size, const Uint32 loopS,
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130 const Uint32 loopE, const int flags);
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131
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132 void jvmSetFreq(JSSMixer *mixer, const int channel, const int freq);
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133 int jvmGetFreq(JSSMixer *mixer, const int channel);
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134 void jvmSetVolume(JSSMixer *mixer, const int channel, const int volume);
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135 int jvmGetVolume(JSSMixer *mixer, const int channel);
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136 void jvmSetPos(JSSMixer *mixer, const int channel, const Uint32 pos);
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137 Uint32 jvmGetPos(JSSMixer *mixer, const int channel);
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138
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139 void jvmSetPan(JSSMixer *mixer, const int channel, const int panning);
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140 int jvmGetPan(JSSMixer *mixer, const int channel);
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141
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142 void jvmMute(JSSMixer *mixer, const int channel, const BOOL mute);
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143
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144 void jvmClear(JSSMixer *mixer, const int channel);
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145 void jvmClearChannels(JSSMixer *mixer);
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146
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147 void jvmSetGlobalVol(JSSMixer *mixer, const int volume);
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148 int jvmGetGlobalVol(JSSMixer *mixer);
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149
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150
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151 #endif // JSSMIX_H
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