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comparison playercode/unix_drv/drv_aix.c @ 8:b30908f9d9f9

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Initial entry of mikmod into the CVS tree.
author darius
date Fri, 23 Jan 1998 16:05:10 +0000
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7:de95ce2eacfd 8:b30908f9d9f9
1 /*
2
3 Name:
4 drv_aix.c
5
6 Description:
7 Mikmod driver for output to AIX series audio device
8
9 Portability:
10
11 AIX >= 3.25 with appropriate audio hardware.
12
13 Written by Lutz Vieweg <lkv@mania.robin.de>
14 based on drv_raw.c
15
16 Feel free to distribute just as you like.
17 No warranties at all.
18
19 */
20
21 #include <stdio.h>
22 #include <stdlib.h>
23
24 #include <unistd.h>
25 #include <fcntl.h>
26 #include <errno.h>
27 #include <sys/stat.h>
28 #include <sys/audio.h>
29
30 #include "mikmod.h"
31
32 struct _track_info
33 {
34 unsigned short master_volume;
35 unsigned short dither_percent;
36 unsigned short reserved[3];
37 } t_info;
38 audio_init a_init;
39 audio_control a_control;
40 audio_change a_change;
41
42
43 static int fd;
44 #define RAWBUFFERSIZE 32768
45 static char RAW_DMABUF[RAWBUFFERSIZE];
46
47 static BOOL AIX_IsThere(void)
48 {
49 return 1;
50 }
51
52 static BOOL AIX_Init(void)
53 {
54 float volume = (float)1.0;
55 int flags;
56
57 if (! (md_mode & DMODE_16BITS)) {
58 myerr = "sorry, this driver supports 16-bit linear output only";
59 return 0;
60 }
61
62 if ((fd = open ("/dev/acpa0/1", O_WRONLY)) < 3)
63 if ((fd = open ("/dev/paud0/1", O_WRONLY)) < 3)
64 if ((fd = open ("/dev/baud0/1", O_WRONLY)) < 3)
65 {
66 myerr = "unable to open audio-device";
67 return 0;
68 }
69
70
71 t_info.master_volume=0x7fff;
72 t_info.dither_percent=0;
73
74 a_init.srate=md_mixfreq;
75 a_init.bits_per_sample=16;
76 a_init.channels=(md_mode & DMODE_STEREO)? 2 : 1;
77 a_init.mode=PCM;
78 a_init.flags=FIXED | BIG_ENDIAN | TWOS_COMPLEMENT;
79 a_init.operation=PLAY;
80
81 a_change.balance=0x3fff0000;
82 a_change.balance_delay=0;
83 a_change.volume=(long)(volume * (float)0x7FFFFFFF);
84 a_change.volume_delay=0;
85 a_change.monitor=AUDIO_IGNORE;
86 a_change.input=AUDIO_IGNORE;
87 a_change.output=OUTPUT_1;
88 a_change.dev_info=&t_info;
89
90 a_control.ioctl_request=AUDIO_CHANGE;
91 a_control.position=0;
92 a_control.request_info=&a_change;
93
94 if (ioctl(fd, AUDIO_INIT, &a_init) == -1 )
95 {
96 myerr = "configuration (init) of audio device failed";
97 return 0;
98 }
99 if (ioctl(fd, AUDIO_CONTROL, &a_control) == -1 )
100 {
101 myerr = "configuration (control) of audio device failed";
102 return 0;
103 }
104
105 a_control.ioctl_request=AUDIO_START;
106 a_control.request_info=NULL;
107 if (ioctl(fd, AUDIO_CONTROL, &a_control) == -1 )
108 {
109 myerr = "configuration (start) of audio device failed";
110 return 0;
111 }
112
113 #if 0
114 if ((flags = fcntl (fd, F_GETFL, 0)) < 0) {
115 myerr = "unable to set non-blocking mode for /dev/audio";
116 return 0;
117 }
118 flags |= O_NDELAY;
119 if (fcntl (fd, F_SETFL, flags) < 0) {
120 myerr = "unable to set non-blocking mode for /dev/audio";
121 return 0;
122 }
123 #endif
124
125 if(!VC_Init()){
126 close(fd);
127 return 0;
128 }
129
130 return 1;
131 }
132
133
134
135 static void AIX_Exit(void)
136 {
137 VC_Exit();
138 close(fd);
139 }
140
141
142 static void AIX_Update(void)
143 {
144 VC_WriteBytes(RAW_DMABUF,RAWBUFFERSIZE);
145 write(fd, RAW_DMABUF, RAWBUFFERSIZE);
146 }
147
148
149 DRIVER drv_aix={
150 NULL,
151 "AIX audio-device",
152 "MikMod AIX audio-device driver v1.10",
153 AIX_IsThere,
154 VC_SampleLoad,
155 VC_SampleUnload,
156 VC_SampleSpace,
157 VC_SampleLength,
158 AIX_Init,
159 AIX_Exit,
160 VC_SetNumChannels,
161 VC_PlayStart,
162 VC_PlayStop,
163 AIX_Update,
164 VC_VoiceSetVolume,
165 VC_VoiceSetFrequency,
166 VC_VoiceSetPanning,
167 VC_VoicePlay,
168 VC_VoiceStop,
169 VC_VoiceStopped,
170 VC_VoiceReleaseSustain,
171 VC_VoiceGetPosition,
172 VC_RealVolume
173 };