wmclockmon: update change-log
[dockapps.git] / wmsmixer / mixctl.h
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1 // mixctl.h - MixCtl class provides control of audio mixer functions
2 // 05/09/98 Release 1.0 Beta1
3 // Copyright (C) 1998 Sam Hawker <shawkie@geocities.com>
4 // This software comes with ABSOLUTELY NO WARRANTY
5 // This software is free software, and you are welcome to redistribute it
6 // under certain conditions
7 // See the COPYING file for details.
9 // Although mixctl.h is an integral part of wmmixer, it may also be distributed seperately.
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <sys/ioctl.h>
14 #include <sys/types.h>
15 #include <sys/stat.h>
16 #include <fcntl.h>
17 #include <unistd.h>
18 #ifdef __NetBSD__
19 #include <soundcard.h>
20 #endif
21 #ifdef __FreeBSD__
22 #include <machine/soundcard.h>
23 #endif
24 #ifdef __linux__
25 #include <linux/soundcard.h>
26 #endif
28 class MixCtl
30 public:
31 MixCtl(char *dname){
32 device=(char *)malloc(sizeof(char)*(strlen(dname)+1));
33 strcpy(device,dname);
34 if(mixfdopen=(mixfd=open(device,O_RDONLY | O_NONBLOCK))!=-1){
35 nrdevices=SOUND_MIXER_NRDEVICES;
36 char *devnames[]=SOUND_DEVICE_NAMES;
37 char *devlabels[]=SOUND_DEVICE_LABELS;
38 ioctl(mixfd, SOUND_MIXER_READ_DEVMASK, &devmask);
39 ioctl(mixfd, SOUND_MIXER_READ_STEREODEVS, &stmask);
40 ioctl(mixfd, SOUND_MIXER_READ_RECMASK, &recmask);
41 ioctl(mixfd, SOUND_MIXER_READ_CAPS, &caps);
42 mixdevs=(struct MixDev *)malloc(sizeof(struct MixDev)*nrdevices);
43 int mixmask=1;
44 for(int i=0;i<nrdevices;i++){
45 mixdevs[i].support=devmask & mixmask;
46 mixdevs[i].stereo=stmask & mixmask;
47 mixdevs[i].records=recmask & mixmask;
48 mixdevs[i].mask=mixmask;
49 mixdevs[i].name=devnames[i];
50 mixdevs[i].label=devlabels[i];
51 mixmask*=2;
53 doStatus();
56 ~MixCtl(){
57 if(mixfdopen){
58 if(mixdevs!=NULL)
59 free(mixdevs);
60 close(mixfd);
63 bool openOK(){
64 return mixfdopen;
66 void doStatus(){
67 ioctl(mixfd, SOUND_MIXER_READ_RECSRC, &recsrc);
68 for(int i=0;i<nrdevices;i++){
69 if(mixdevs[i].support)
70 ioctl(mixfd, MIXER_READ(i), &mixdevs[i].value);
71 mixdevs[i].recsrc=(recsrc & mixdevs[i].mask);
75 // Return volume for a device, optionally reading it from device first.
76 // Can be used as a way to avoid calling doStatus().
77 int readVol(int dev, bool read){
78 if(read)
79 ioctl(mixfd, MIXER_READ(dev), &mixdevs[dev].value);
80 return mixdevs[dev].value;
83 // Return left and right componenets of volume for a device.
84 // If you are lazy, you can call readVol to read from the device, then these
85 // to get left and right values.
86 int readLeft(int dev){
87 return mixdevs[dev].value%256;
89 int readRight(int dev){
90 return mixdevs[dev].value/256;
93 // Write volume to device. Use setVolume, setLeft and setRight first.
94 void writeVol(int dev){
95 ioctl(mixfd, MIXER_WRITE(dev), &mixdevs[dev].value);
98 // Set volume (or left or right component) for a device. You must call writeVol to write it.
99 void setVol(int dev, int value){
100 mixdevs[dev].value=value;
102 void setBoth(int dev, int l, int r){
103 mixdevs[dev].value=256*r+l;
105 void setLeft(int dev, int l){
106 int r;
107 if(mixdevs[dev].stereo)
108 r=mixdevs[dev].value/256;
109 else
110 r=l;
111 mixdevs[dev].value=256*r+l;
113 void setRight(int dev, int r){
114 int l;
115 if(mixdevs[dev].stereo)
116 l=mixdevs[dev].value%256;
117 else
118 l=r;
119 mixdevs[dev].value=256*r+l;
122 // Return record source value for a device, optionally reading it from device first.
123 bool readRec(int dev, bool read){
124 if(read){
125 ioctl(mixfd, SOUND_MIXER_READ_RECSRC, &recsrc);
126 mixdevs[dev].recsrc=(recsrc & mixdevs[dev].mask);
128 return mixdevs[dev].recsrc;
131 // Write record source values to device. Use setRec first.
132 void writeRec(){
133 ioctl(mixfd, SOUND_MIXER_WRITE_RECSRC, &recsrc);
136 // Make a device (not) a record source.
137 void setRec(int dev, bool rec){
138 if(rec){
139 if(caps & SOUND_CAP_EXCL_INPUT)
140 recsrc=mixdevs[dev].mask;
141 else
142 recsrc|=mixdevs[dev].mask;
144 else
145 recsrc&=~mixdevs[dev].mask;
148 // Return various other info
149 char *getDevName(){
150 return device;
152 int getNrDevices(){
153 return nrdevices;
155 int getCapabilities(){
156 return caps;
158 bool getSupport(int dev){
159 return mixdevs[dev].support;
161 bool getStereo(int dev){
162 return mixdevs[dev].stereo;
164 bool getRecords(int dev){
165 return mixdevs[dev].records;
167 char *getName(int dev){
168 return mixdevs[dev].name;
170 char *getLabel(int dev){
171 return mixdevs[dev].label;
174 private:
175 int mixfd;
176 int mixfdopen;
177 char *device;
179 struct MixDev{
180 bool support;
181 bool stereo;
182 bool recsrc;
183 bool records;
184 char *name;
185 char *label;
186 int value;
187 int mask;
190 int nrdevices; // maximum number of devices
191 int devmask; // supported devices
192 int stmask; // stereo devices
193 int recmask; // devices which can be recorded from
194 int caps; // capabilities
195 int recsrc; // devices which are being recorded from
196 struct MixDev *mixdevs;