char *getCurrentlySelectedDeviceName(ASDeviceType typeRequested) {
AudioDeviceID currentDeviceID = kAudioDeviceUnknown;
char *currentDeviceName = malloc(256 * sizeof(char));
currentDeviceID = getCurrentlySelectedDeviceID(typeRequested);
getDeviceName(currentDeviceID, currentDeviceName);
return currentDeviceName;
}
void showCurrentlySelectedDeviceID(ASDeviceType typeRequested) {
AudioDeviceID currentDeviceID = kAudioDeviceUnknown;
char currentDeviceName[256];
currentDeviceID = getCurrentlySelectedDeviceID(typeRequested);
getDeviceName(currentDeviceID, currentDeviceName);
printf("%s\n",currentDeviceName);
}
void setDeviceWithFallback(AudioDeviceID newDeviceID, AudioDeviceID fallbackDeviceID, ASDeviceType typeRequested) {
UInt32 propertySize = sizeof(UInt32);
if (getCurrentlySelectedDeviceID(typeRequested) == newDeviceID) {
setDevice(fallbackDeviceID, typeRequested);
} else {
setDevice(newDeviceID, 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;
}
