私は答えを見つけました。 kAudioDevicePropertyTransportTypeは私が欲しかったものです。
Xcodeで列挙型をクリックすると、間違ったファイルAudioHarwareDeprecated.hが正しいAudioHardwareBase.hの代わりに表示されていたので、私はいくつかの列挙型の値を見ることができました。
#import <Foundation/Foundation.h>
#import <CoreAudio/CoreAudio.h>
static void logMessage(NSString *format, ...)
{
va_list args;
va_start(args, format);
NSMutableString *formattedString = [[NSMutableString alloc] initWithFormat:format
arguments:args];
va_end(args);
if (![formattedString hasSuffix:@"\n"]) {
[formattedString appendString:@"\n"];
}
NSData *formattedData = [formattedString dataUsingEncoding:NSUTF8StringEncoding];
[NSFileHandle.fileHandleWithStandardOutput writeData:formattedData];
}
/*
* Format a 32-bit code (for instance OSStatus) into a string.
*/
static char *codeToString(UInt32 code)
{
static char str[5] = { '\0' };
UInt32 swapped = CFSwapInt32HostToBig(code);
memcpy(str, &swapped, sizeof(swapped));
return str;
}
static NSString *formatStatusError(OSStatus status)
{
if (status == noErr) {
return [NSString stringWithFormat:@"No error (%d)", status];
}
return [NSString stringWithFormat:@"Error \"%s\" (%d)",
codeToString(status),
status];
}
static void assertStatusSuccess(OSStatus status)
{
if (status != noErr)
{
logMessage(@"Got error %u: '%s'\n", status, codeToString(status));
abort();
}
}
static inline AudioObjectPropertyAddress makeGlobalPropertyAddress(AudioObjectPropertySelector selector)
{
AudioObjectPropertyAddress address = {
selector,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster,
};
return address;
}
static NSString *getStringProperty(AudioDeviceID deviceID,
AudioObjectPropertySelector selector)
{
AudioObjectPropertyAddress address = makeGlobalPropertyAddress(selector);
CFStringRef prop;
UInt32 propSize = sizeof(prop);
OSStatus status = AudioObjectGetPropertyData(deviceID,
&address,
0,
NULL,
&propSize,
&prop);
if (status != noErr) {
return formatStatusError(status);
}
return (__bridge_transfer NSString *)prop;
}
static NSString *getURLProperty(AudioDeviceID deviceID,
AudioObjectPropertySelector selector)
{
AudioObjectPropertyAddress address = makeGlobalPropertyAddress(selector);
CFURLRef prop;
UInt32 propSize = sizeof(prop);
OSStatus status = AudioObjectGetPropertyData(deviceID,
&address,
0,
NULL,
&propSize,
&prop);
if (status != noErr) {
return formatStatusError(status);
}
NSURL *url = (__bridge_transfer NSURL *)prop;
return url.absoluteString;
}
static NSString *getCodeProperty(AudioDeviceID deviceID,
AudioObjectPropertySelector selector)
{
AudioObjectPropertyAddress address = makeGlobalPropertyAddress(selector);
UInt32 prop;
UInt32 propSize = sizeof(prop);
OSStatus status = AudioObjectGetPropertyData(deviceID,
&address,
0,
NULL,
&propSize,
&prop);
if (status != noErr) {
return formatStatusError(status);
}
return [NSString stringWithFormat:@"%s (%d)",
codeToString(prop),
prop];
}
static NSUInteger getChannelCount(AudioDeviceID deviceID,
AudioObjectPropertyScope scope)
{
AudioObjectPropertyAddress address = {
kAudioDevicePropertyStreamConfiguration,
scope,
kAudioObjectPropertyElementMaster,
};
AudioBufferList streamConfiguration;
UInt32 propSize = sizeof(streamConfiguration);
OSStatus status = AudioObjectGetPropertyData(deviceID,
&address,
0,
NULL,
&propSize,
&streamConfiguration);
assertStatusSuccess(status);
NSUInteger channelCount = 0;
for (NSUInteger i = 0; i < streamConfiguration.mNumberBuffers; i++)
{
channelCount += streamConfiguration.mBuffers[i].mNumberChannels;
}
return channelCount;
}
static NSString *getSourceName(AudioDeviceID deviceID,
AudioObjectPropertyScope scope)
{
AudioObjectPropertyAddress address = {
kAudioDevicePropertyDataSource,
scope,
kAudioObjectPropertyElementMaster,
};
UInt32 sourceCode;
UInt32 propSize = sizeof(sourceCode);
OSStatus status = AudioObjectGetPropertyData(deviceID,
&address,
0,
NULL,
&propSize,
&sourceCode);
if (status != noErr) {
return formatStatusError(status);
}
return [NSString stringWithFormat:@"%s (%d)",
codeToString(sourceCode),
sourceCode];
}
static void inspectDevice(AudioDeviceID deviceID)
{
logMessage(@"Device %d", deviceID);
logMessage(@" - UID: %@", getStringProperty(deviceID, kAudioDevicePropertyDeviceUID));
logMessage(@" - Model UID: %@", getStringProperty(deviceID, kAudioDevicePropertyModelUID));
logMessage(@" - Name: %@", getStringProperty(deviceID, kAudioDevicePropertyDeviceNameCFString));
logMessage(@" - Manufacturer: %@", getStringProperty(deviceID, kAudioDevicePropertyDeviceManufacturerCFString));
logMessage(@" - Input channels: %@", @(getChannelCount(deviceID, kAudioObjectPropertyScopeInput)));
logMessage(@" - Output channels: %@", @(getChannelCount(deviceID, kAudioObjectPropertyScopeOutput)));
logMessage(@" - Input source: %@", getSourceName(deviceID, kAudioObjectPropertyScopeInput));
logMessage(@" - Output source: %@", getSourceName(deviceID, kAudioObjectPropertyScopeOutput));
logMessage(@" - Transport type: %@", getCodeProperty(deviceID, kAudioDevicePropertyTransportType));
logMessage(@" - Icon: %@", getURLProperty(deviceID, kAudioDevicePropertyIcon));
}
static void inspectDeviceForSelector(AudioObjectPropertySelector selector)
{
AudioDeviceID deviceID;
UInt32 propSize = sizeof(AudioDeviceID);
AudioObjectPropertyAddress address = makeGlobalPropertyAddress(selector);
OSStatus status = AudioObjectGetPropertyData(kAudioObjectSystemObject,
&address,
0,
NULL,
&propSize,
&deviceID);
assertStatusSuccess(status);
inspectDevice(deviceID);
}
static void inspectAllDevices()
{
// Check the number of devices.
AudioObjectPropertyAddress address = makeGlobalPropertyAddress(kAudioHardwarePropertyDevices);
UInt32 devicesDataSize;
OSStatus status = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject,
&address,
0,
NULL,
&devicesDataSize);
assertStatusSuccess(status);
// Get the devices.
int count = devicesDataSize/sizeof(AudioDeviceID);
AudioDeviceID deviceIDs[count];
status = AudioObjectGetPropertyData(kAudioObjectSystemObject,
&address,
0,
NULL,
&devicesDataSize,
deviceIDs);
assertStatusSuccess(status);
// Inspect them.
for (UInt32 i = 0; i < count; i++) {
inspectDevice(deviceIDs[i]);
}
}
int main(int argc, const char * argv[])
{
@autoreleasepool {
logMessage(@"==== ALL DEVICES ====");
inspectAllDevices();
logMessage(@"");
logMessage(@"==== DEFAULT INPUT DEVICE ====");
inspectDeviceForSelector(kAudioHardwarePropertyDefaultInputDevice);
logMessage(@"");
logMessage(@"==== DEFAULT OUTPUT DEVICE ====");
inspectDeviceForSelector(kAudioHardwarePropertyDefaultOutputDevice);
logMessage(@"");
}
return 0;
}
：
これは私が誰ケース内のデバイスを検査するために使用している完全なプログラムでは、いくつかの例を必要とします