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