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8
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1 /*
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2
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3 Name:
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4 drv_aix.c
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5
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6 Description:
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7 Mikmod driver for output to AIX series audio device
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8
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9 Portability:
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10
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11 AIX >= 3.25 with appropriate audio hardware.
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12
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13 Written by Lutz Vieweg <lkv@mania.robin.de>
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14 based on drv_raw.c
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15
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16 Feel free to distribute just as you like.
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17 No warranties at all.
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18
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19 */
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20
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21 #include <stdio.h>
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22 #include <stdlib.h>
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23
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24 #include <unistd.h>
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25 #include <fcntl.h>
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26 #include <errno.h>
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27 #include <sys/stat.h>
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28 #include <sys/audio.h>
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29
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30 #include "mikmod.h"
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31
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32 struct _track_info
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33 {
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34 unsigned short master_volume;
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35 unsigned short dither_percent;
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36 unsigned short reserved[3];
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37 } t_info;
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38 audio_init a_init;
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39 audio_control a_control;
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40 audio_change a_change;
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41
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42
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43 static int fd;
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44 #define RAWBUFFERSIZE 32768
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45 static char RAW_DMABUF[RAWBUFFERSIZE];
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46
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47 static BOOL AIX_IsThere(void)
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48 {
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49 return 1;
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50 }
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51
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52 static BOOL AIX_Init(void)
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53 {
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54 float volume = (float)1.0;
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55 int flags;
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56
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57 if (! (md_mode & DMODE_16BITS)) {
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58 myerr = "sorry, this driver supports 16-bit linear output only";
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59 return 0;
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60 }
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61
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62 if ((fd = open ("/dev/acpa0/1", O_WRONLY)) < 3)
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63 if ((fd = open ("/dev/paud0/1", O_WRONLY)) < 3)
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64 if ((fd = open ("/dev/baud0/1", O_WRONLY)) < 3)
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65 {
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66 myerr = "unable to open audio-device";
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67 return 0;
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68 }
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69
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70
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71 t_info.master_volume=0x7fff;
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72 t_info.dither_percent=0;
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73
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74 a_init.srate=md_mixfreq;
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75 a_init.bits_per_sample=16;
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76 a_init.channels=(md_mode & DMODE_STEREO)? 2 : 1;
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77 a_init.mode=PCM;
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78 a_init.flags=FIXED | BIG_ENDIAN | TWOS_COMPLEMENT;
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79 a_init.operation=PLAY;
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80
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81 a_change.balance=0x3fff0000;
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82 a_change.balance_delay=0;
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83 a_change.volume=(long)(volume * (float)0x7FFFFFFF);
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84 a_change.volume_delay=0;
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85 a_change.monitor=AUDIO_IGNORE;
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86 a_change.input=AUDIO_IGNORE;
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87 a_change.output=OUTPUT_1;
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88 a_change.dev_info=&t_info;
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89
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90 a_control.ioctl_request=AUDIO_CHANGE;
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91 a_control.position=0;
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92 a_control.request_info=&a_change;
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93
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94 if (ioctl(fd, AUDIO_INIT, &a_init) == -1 )
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95 {
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96 myerr = "configuration (init) of audio device failed";
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97 return 0;
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98 }
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99 if (ioctl(fd, AUDIO_CONTROL, &a_control) == -1 )
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100 {
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101 myerr = "configuration (control) of audio device failed";
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102 return 0;
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103 }
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104
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105 a_control.ioctl_request=AUDIO_START;
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106 a_control.request_info=NULL;
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107 if (ioctl(fd, AUDIO_CONTROL, &a_control) == -1 )
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108 {
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109 myerr = "configuration (start) of audio device failed";
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110 return 0;
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111 }
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112
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113 #if 0
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114 if ((flags = fcntl (fd, F_GETFL, 0)) < 0) {
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115 myerr = "unable to set non-blocking mode for /dev/audio";
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116 return 0;
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117 }
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118 flags |= O_NDELAY;
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119 if (fcntl (fd, F_SETFL, flags) < 0) {
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120 myerr = "unable to set non-blocking mode for /dev/audio";
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121 return 0;
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122 }
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123 #endif
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124
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125 if(!VC_Init()){
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126 close(fd);
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127 return 0;
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128 }
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129
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130 return 1;
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131 }
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132
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133
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134
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135 static void AIX_Exit(void)
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136 {
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137 VC_Exit();
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138 close(fd);
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139 }
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140
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141
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142 static void AIX_Update(void)
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143 {
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144 VC_WriteBytes(RAW_DMABUF,RAWBUFFERSIZE);
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145 write(fd, RAW_DMABUF, RAWBUFFERSIZE);
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146 }
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147
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148
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149 DRIVER drv_aix={
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150 NULL,
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151 "AIX audio-device",
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152 "MikMod AIX audio-device driver v1.10",
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153 AIX_IsThere,
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154 VC_SampleLoad,
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155 VC_SampleUnload,
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156 VC_SampleSpace,
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157 VC_SampleLength,
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158 AIX_Init,
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159 AIX_Exit,
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160 VC_SetNumChannels,
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161 VC_PlayStart,
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162 VC_PlayStop,
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163 AIX_Update,
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164 VC_VoiceSetVolume,
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165 VC_VoiceSetFrequency,
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166 VC_VoiceSetPanning,
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167 VC_VoicePlay,
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168 VC_VoiceStop,
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169 VC_VoiceStopped,
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170 VC_VoiceReleaseSustain,
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171 VC_VoiceGetPosition,
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172 VC_RealVolume
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173 };
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