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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_hp.c
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5
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6 Description:
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7 Mikmod driver for output to HP 9000 series /dev/audio
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8
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9 Portability:
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10
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11 HP-UX only
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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 <sys/audio.h>
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25 #include <unistd.h>
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26 #include <fcntl.h>
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27 #include <sys/ioctl.h>
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28
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29 #include "mikmod.h"
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30
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31 static int fd;
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32 #define RAWBUFFERSIZE 16384
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33 static char RAW_DMABUF[RAWBUFFERSIZE];
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34
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35 static BOOL HP_IsThere(void)
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36 {
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37 return 1;
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38 }
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39
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40 static BOOL HP_Init(void)
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41 {
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42 int flags;
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43
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44 if (! (md_mode & DMODE_16BITS)) {
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45 myerr = "sorry, this driver supports 16-bit linear output only";
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46 return 0;
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47 }
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48
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49 if ((fd = open("/dev/audio", O_WRONLY | O_NDELAY, 0)) < 0) {
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50 myerr = "unable to open /dev/audio";
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51 return 0;
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52 }
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53
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54 if ((flags = fcntl (fd, F_GETFL, 0)) < 0) {
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55 myerr = "unable to set non-blocking mode for /dev/audio";
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56 return 0;
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57 }
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58 flags |= O_NDELAY;
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59 if (fcntl (fd, F_SETFL, flags) < 0) {
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60 myerr = "unable to set non-blocking mode for /dev/audio";
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61 return 0;
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62 }
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63
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64 if (ioctl(fd, AUDIO_SET_DATA_FORMAT, AUDIO_FORMAT_LINEAR16BIT)) {
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65 myerr = "unable to select 16bit-linear sample format";
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66 return 0;
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67 }
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68
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69 if (ioctl(fd, AUDIO_SET_SAMPLE_RATE, md_mixfreq)) {
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70 myerr = "unable to select requested sample-rate";
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71 return 0;
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72 }
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73
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74 if (ioctl(fd, AUDIO_SET_CHANNELS, (md_mode & DMODE_STEREO)? 2 : 1)) {
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75 myerr = "unable to select requested number of channels";
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76 return 0;
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77 }
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78
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79 /*
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80 choose between:
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81 AUDIO_OUT_SPEAKER
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82 AUDIO_OUT_HEADPHONE
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83 AUDIO_OUT_LINE
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84 */
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85 if (ioctl(fd, AUDIO_SET_OUTPUT,
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86 AUDIO_OUT_SPEAKER | AUDIO_OUT_HEADPHONE | AUDIO_OUT_LINE)) {
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87 myerr = "unable to select audio output";
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88 return 0;
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89 }
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90
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91 {
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92 struct audio_describe description;
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93 struct audio_gains gains;
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94 float volume = 1.0;
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95 if (ioctl(fd, AUDIO_DESCRIBE, &description)) {
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96 myerr = "unable to get audio description";
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97 return 0;
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98 }
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99 if (ioctl (fd, AUDIO_GET_GAINS, &gains)) {
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100 myerr = "unable to get gain values";
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101 return 0;
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102 }
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103
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104 gains.transmit_gain = (int)((float)description.min_transmit_gain +
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105 (float)(description.max_transmit_gain
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106 - description.min_transmit_gain)
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107 * volume);
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108 if (ioctl (fd, AUDIO_SET_GAINS, &gains)) {
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109 myerr = "unable to set gain values";
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110 return 0;
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111 }
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112 }
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113
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114 if (ioctl(fd, AUDIO_SET_TXBUFSIZE, RAWBUFFERSIZE*8)) {
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115 myerr = "unable to set transmission buffer size";
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116 return 0;
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117 }
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118
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119 if(!VC_Init()){
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120 close(fd);
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121 return 0;
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122 }
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123
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124 return 1;
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125 }
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126
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127
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128
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129 static void HP_Exit(void)
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130 {
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131 VC_Exit();
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132 close(fd);
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133 }
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134
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135
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136 static void HP_Update(void)
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137 {
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138 VC_WriteBytes(RAW_DMABUF,RAWBUFFERSIZE);
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139 write(fd, RAW_DMABUF, RAWBUFFERSIZE);
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140 }
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141
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142
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143 DRIVER drv_hp={
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144 NULL,
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145 "HP-UX /dev/audio",
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146 "MikMod HP-UX /dev/audio driver v1.10",
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147 HP_IsThere,
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148 VC_SampleLoad,
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149 VC_SampleUnload,
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150 VC_SampleSpace,
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151 VC_SampleLength,
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152 HP_Init,
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153 HP_Exit,
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154 VC_SetNumChannels,
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155 VC_PlayStart,
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156 VC_PlayStop,
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157 HP_Update,
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158 VC_VoiceSetVolume,
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159 VC_VoiceSetFrequency,
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160 VC_VoiceSetPanning,
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161 VC_VoicePlay,
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162 VC_VoiceStop,
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163 VC_VoiceStopped,
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164 VC_VoiceReleaseSustain,
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165 VC_VoiceGetPosition,
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166 VC_RealVolume
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167 };
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