void showAllDevices(ASDeviceType typeRequested) {
UInt32 propertySize;
AudioDeviceID dev_array[64];
int numberOfDevices = 0;
ASDeviceType device_type;
char deviceName[256];
AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &propertySize, NULL);
AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &propertySize, dev_array);
numberOfDevices = (propertySize / sizeof(AudioDeviceID));
for(int i = 0; i < numberOfDevices; ++i) {
device_type = getDeviceType(dev_array[i]);
switch(typeRequested) {
case kAudioTypeInput:
case kAudioTypeOutput:
if (device_type != typeRequested) continue;
break;
case kAudioTypeSystemOutput:
if (device_type != kAudioTypeOutput) continue;
break;
}
getDeviceName(dev_array[i], deviceName);
printf("%s (%s)\n",deviceName,deviceTypeName(device_type));
}
}
void setDevice(AudioDeviceID newDeviceID, ASDeviceType typeRequested) {
UInt32 propertySize = sizeof(UInt32);
switch(typeRequested) {
case kAudioTypeInput:
AudioHardwareSetProperty(kAudioHardwarePropertyDefaultInputDevice, propertySize, &newDeviceID);
break;
case kAudioTypeOutput:
AudioHardwareSetProperty(kAudioHardwarePropertyDefaultOutputDevice, propertySize, &newDeviceID);
break;
case kAudioTypeSystemOutput:
AudioHardwareSetProperty(kAudioHardwarePropertyDefaultSystemOutputDevice, propertySize, &newDeviceID);
break;
}
printf("%s audio device set to \"%s\"\n", deviceTypeName(typeRequested), getCurrentlySelectedDeviceName(typeRequested));
}
int runAudioSwitch(int argc, const char * argv[]) {
char requestedDeviceName[256];
AudioDeviceID chosenDeviceID = kAudioDeviceUnknown;
ASDeviceType typeRequested = kAudioTypeUnknown;
int function = 0;
int c;
while ((c = getopt(argc, (char **)argv, "hacnt:s:")) != -1) {
switch (c) {
case 'a':
// show all
function = kFunctionShowAll;
break;
case 'c':
// get current device
function = kFunctionShowCurrent;
break;
case 'h':
// show help
function = kFunctionShowHelp;
break;
case 'n':
// cycle to the next audio device
function = kFunctionCycleNext;
break;
case 's':
// set the requestedDeviceName
function = kFunctionSetDevice;
strcpy(requestedDeviceName, optarg);
break;
case 't':
// set the requestedDeviceName
if (strcmp(optarg, "input") == 0) {
typeRequested = kAudioTypeInput;
} else if (strcmp(optarg, "output") == 0) {
typeRequested = kAudioTypeOutput;
} else if (strcmp(optarg, "system") == 0) {
typeRequested = kAudioTypeSystemOutput;
} else {
printf("Invalid device type \"%s\" specified.\n",optarg);
showUsage(argv[0]);
return 1;
}
break;
}
}
if (function == kFunctionShowAll) {
switch(typeRequested) {
case kAudioTypeInput:
case kAudioTypeOutput:
showAllDevices(typeRequested);
break;
case kAudioTypeSystemOutput:
showAllDevices(kAudioTypeOutput);
break;
default:
showAllDevices(kAudioTypeInput);
showAllDevices(kAudioTypeOutput);
}
return 0;
}
if (function == kFunctionShowHelp) {
showUsage(argv[0]);
return 0;
}
if (function == kFunctionShowCurrent) {
if (typeRequested == kAudioTypeUnknown) typeRequested = kAudioTypeOutput;
showCurrentlySelectedDeviceID(typeRequested);
return 0;
}
if (typeRequested == kAudioTypeUnknown) typeRequested = kAudioTypeOutput;
if (function == kFunctionCycleNext) {
// get current device of requested type
chosenDeviceID = getCurrentlySelectedDeviceID(typeRequested);
if (chosenDeviceID == kAudioDeviceUnknown) {
printf("Could not find current audio device of type %s. Nothing was changed.\n", deviceTypeName(typeRequested));
return 1;
}
// find next device to current device
chosenDeviceID = getNextDeviceID(chosenDeviceID, typeRequested);
if (chosenDeviceID == kAudioDeviceUnknown) {
printf("Could not find next audio device of type %s. Nothing was changed.\n", deviceTypeName(typeRequested));
return 1;
}
// choose the requested audio device
setDevice(chosenDeviceID, typeRequested);
getDeviceName(chosenDeviceID, requestedDeviceName);
printf("%s audio device set to \"%s\"\n", deviceTypeName(typeRequested), requestedDeviceName);
return 0;
}
if (function != kFunctionSetDevice) {
printf("Please specify audio device.\n");
showUsage(argv[0]);
return 1;
}
// find the id of the requested device
chosenDeviceID = getRequestedDeviceID(requestedDeviceName, typeRequested);
if (chosenDeviceID == kAudioDeviceUnknown) {
printf("Could not find an audio device named \"%s\" of type %s. Nothing was changed.\n",requestedDeviceName, deviceTypeName(typeRequested));
return 1;
}
// choose the requested audio device
setDevice(chosenDeviceID, typeRequested);
printf("%s audio device set to \"%s\"\n", deviceTypeName(typeRequested), requestedDeviceName);
return 0;
}
