449 lines
13 KiB
Objective-C
449 lines
13 KiB
Objective-C
//
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// OutputCoreAudio.m
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// Cog
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//
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// Created by Vincent Spader on 8/2/05.
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// Copyright 2005 Vincent Spader. All rights reserved.
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//
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#import "OutputCoreAudio.h"
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#import "OutputNode.h"
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#import "Logging.h"
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extern void scale_by_volume(float * buffer, size_t count, float volume);
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@implementation OutputCoreAudio
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- (id)initWithController:(OutputNode *)c
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{
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self = [super init];
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if (self)
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{
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outputController = c;
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_au = nil;
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_bufferSize = 0;
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volume = 1.0;
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outputDeviceID = -1;
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listenerapplied = NO;
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running = NO;
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_sema = dispatch_semaphore_create(0);
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[[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.outputDevice" options:0 context:NULL];
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}
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return self;
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}
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static OSStatus
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default_device_changed(AudioObjectID inObjectID, UInt32 inNumberAddresses, const AudioObjectPropertyAddress *inAddresses, void *inUserData)
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{
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OutputCoreAudio *this = (__bridge OutputCoreAudio *) inUserData;
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return [this setOutputDeviceByID:-1];
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}
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
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{
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if ([keyPath isEqualToString:@"values.outputDevice"]) {
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NSDictionary *device = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] objectForKey:@"outputDevice"];
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[self setOutputDeviceWithDeviceDict:device];
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}
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}
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- (void)threadEntry:(id)arg
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{
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running = YES;
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size_t eventCount = 0;
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while (!stopping) {
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dispatch_semaphore_wait(_sema, DISPATCH_TIME_FOREVER);
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if (++eventCount == 128) {
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[self updateDeviceFormat];
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eventCount = 0;
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}
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}
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stopped = YES;
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[self stop];
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}
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- (OSStatus)setOutputDeviceByID:(AudioDeviceID)deviceID
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{
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OSStatus err;
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BOOL defaultDevice = NO;
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AudioObjectPropertyAddress theAddress = {
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.mSelector = kAudioHardwarePropertyDefaultOutputDevice,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster
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};
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if (deviceID == -1) {
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defaultDevice = YES;
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UInt32 size = sizeof(AudioDeviceID);
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err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &theAddress, 0, NULL, &size, &deviceID);
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if (err != noErr) {
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DLog(@"THERE'S NO DEFAULT OUTPUT DEVICE");
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return err;
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}
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}
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if (_au) {
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AudioObjectPropertyAddress defaultDeviceAddress = theAddress;
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if (listenerapplied && !defaultDevice) {
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AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &defaultDeviceAddress, default_device_changed, (__bridge void * _Nullable)(self));
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listenerapplied = NO;
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}
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if (outputDeviceID != deviceID) {
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DLog(@"Device: %i\n", deviceID);
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outputDeviceID = deviceID;
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NSError *nserr;
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[_au setDeviceID:outputDeviceID error:&nserr];
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if (nserr != nil) {
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return (OSErr)[nserr code];
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}
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}
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if (!listenerapplied && defaultDevice) {
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AudioObjectAddPropertyListener(kAudioObjectSystemObject, &defaultDeviceAddress, default_device_changed, (__bridge void * _Nullable)(self));
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listenerapplied = YES;
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}
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}
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else {
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err = noErr;
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}
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if (err != noErr) {
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DLog(@"No output device with ID %d could be found.", deviceID);
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return err;
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}
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return err;
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}
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- (BOOL)setOutputDeviceWithDeviceDict:(NSDictionary *)deviceDict
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{
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NSNumber *deviceIDNum = [deviceDict objectForKey:@"deviceID"];
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AudioDeviceID outputDeviceID = [deviceIDNum unsignedIntValue] ?: -1;
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__block OSStatus err = [self setOutputDeviceByID:outputDeviceID];
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if (err != noErr) {
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// Try matching by name.
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NSString *userDeviceName = deviceDict[@"name"];
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[self enumerateAudioOutputsUsingBlock:
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^(NSString *deviceName, AudioDeviceID deviceID, AudioDeviceID systemDefaultID, BOOL *stop) {
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if ([deviceName isEqualToString:userDeviceName]) {
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err = [self setOutputDeviceByID:deviceID];
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#if 0
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// Disable. Would cause loop by triggering `-observeValueForKeyPath:ofObject:change:context:` above.
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// Update `outputDevice`, in case the ID has changed.
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NSDictionary *deviceInfo = @{
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@"name": deviceName,
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@"deviceID": @(deviceID),
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};
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[[NSUserDefaults standardUserDefaults] setObject:deviceInfo forKey:@"outputDevice"];
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#endif
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DLog(@"Found output device: \"%@\" (%d).", deviceName, deviceID);
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*stop = YES;
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}
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}];
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}
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if (err != noErr) {
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ALog(@"No output device could be found, your random error code is %d. Have a nice day!", err);
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return NO;
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}
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return YES;
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}
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// The following is largely a copy pasta of -awakeFromNib from "OutputsArrayController.m".
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// TODO: Share the code. (How to do this across xcodeproj?)
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- (void)enumerateAudioOutputsUsingBlock:(void (NS_NOESCAPE ^ _Nonnull)(NSString *deviceName, AudioDeviceID deviceID, AudioDeviceID systemDefaultID, BOOL *stop))block
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{
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UInt32 propsize;
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AudioObjectPropertyAddress theAddress = {
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.mSelector = kAudioHardwarePropertyDevices,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster
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};
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__Verify_noErr(AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &theAddress, 0, NULL, &propsize));
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UInt32 nDevices = propsize / (UInt32)sizeof(AudioDeviceID);
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AudioDeviceID *devids = malloc(propsize);
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__Verify_noErr(AudioObjectGetPropertyData(kAudioObjectSystemObject, &theAddress, 0, NULL, &propsize, devids));
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theAddress.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
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AudioDeviceID systemDefault;
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propsize = sizeof(systemDefault);
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__Verify_noErr(AudioObjectGetPropertyData(kAudioObjectSystemObject, &theAddress, 0, NULL, &propsize, &systemDefault));
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theAddress.mScope = kAudioDevicePropertyScopeOutput;
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for (UInt32 i = 0; i < nDevices; ++i) {
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CFStringRef name = NULL;
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propsize = sizeof(name);
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theAddress.mSelector = kAudioDevicePropertyDeviceNameCFString;
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__Verify_noErr(AudioObjectGetPropertyData(devids[i], &theAddress, 0, NULL, &propsize, &name));
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propsize = 0;
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theAddress.mSelector = kAudioDevicePropertyStreamConfiguration;
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__Verify_noErr(AudioObjectGetPropertyDataSize(devids[i], &theAddress, 0, NULL, &propsize));
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if (propsize < sizeof(UInt32)) {
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CFRelease(name);
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continue;
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}
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AudioBufferList * bufferList = (AudioBufferList *) malloc(propsize);
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__Verify_noErr(AudioObjectGetPropertyData(devids[i], &theAddress, 0, NULL, &propsize, bufferList));
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UInt32 bufferCount = bufferList->mNumberBuffers;
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free(bufferList);
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if (!bufferCount) {
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CFRelease(name);
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continue;
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}
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BOOL stop = NO;
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block([NSString stringWithString:(__bridge NSString *)name],
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devids[i],
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systemDefault,
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&stop);
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CFRelease(name);
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if (stop) {
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break;
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}
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}
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free(devids);
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}
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- (BOOL)updateDeviceFormat
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{
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AVAudioFormat *format = _au.outputBusses[0].format;
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if (!_deviceFormat || ![_deviceFormat isEqual:format])
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{
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NSError *err;
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AVAudioFormat *renderFormat;
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_deviceFormat = format;
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deviceFormat = *(format.streamDescription);
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///Seems some 3rd party devices return incorrect stuff...or I just don't like noninterleaved data.
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deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsNonInterleaved;
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// deviceFormat.mFormatFlags &= ~kLinearPCMFormatFlagIsFloat;
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// deviceFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
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// We don't want more than 8 channels
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if (deviceFormat.mChannelsPerFrame > 8) {
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deviceFormat.mChannelsPerFrame = 8;
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}
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deviceFormat.mBytesPerFrame = deviceFormat.mChannelsPerFrame*(deviceFormat.mBitsPerChannel/8);
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deviceFormat.mBytesPerPacket = deviceFormat.mBytesPerFrame * deviceFormat.mFramesPerPacket;
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/* Set the channel layout for the audio queue */
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AudioChannelLayoutTag tag = 0;
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switch (deviceFormat.mChannelsPerFrame) {
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case 1:
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tag = kAudioChannelLayoutTag_Mono;
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break;
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case 2:
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tag = kAudioChannelLayoutTag_Stereo;
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break;
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case 3:
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tag = kAudioChannelLayoutTag_DVD_4;
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break;
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case 4:
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tag = kAudioChannelLayoutTag_Quadraphonic;
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break;
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case 5:
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tag = kAudioChannelLayoutTag_MPEG_5_0_A;
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break;
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case 6:
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tag = kAudioChannelLayoutTag_MPEG_5_1_A;
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break;
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case 7:
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tag = kAudioChannelLayoutTag_MPEG_6_1_A;
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break;
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case 8:
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tag = kAudioChannelLayoutTag_MPEG_7_1_A;
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break;
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}
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renderFormat = [[AVAudioFormat alloc] initWithStreamDescription:&deviceFormat channelLayout:[[AVAudioChannelLayout alloc] initWithLayoutTag:tag]];
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[_au.inputBusses[0] setFormat:renderFormat error:&err];
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if (err != nil)
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return NO;
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[outputController setFormat:&deviceFormat];
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}
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return YES;
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}
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- (BOOL)setup
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{
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if (_au)
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[self stop];
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running = NO;
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stopping = NO;
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stopped = NO;
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outputDeviceID = -1;
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AudioComponentDescription desc;
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NSError *err;
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desc.componentType = kAudioUnitType_Output;
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desc.componentSubType = kAudioUnitSubType_HALOutput;
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desc.componentManufacturer = kAudioUnitManufacturer_Apple;
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desc.componentFlags = 0;
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desc.componentFlagsMask = 0;
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_au = [[AUAudioUnit alloc] initWithComponentDescription:desc error:&err];
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if (err != nil)
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return NO;
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// Setup the output device before mucking with settings
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NSDictionary *device = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] objectForKey:@"outputDevice"];
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if (device) {
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BOOL ok = [self setOutputDeviceWithDeviceDict:device];
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if (!ok) {
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//Ruh roh.
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[self setOutputDeviceWithDeviceDict:nil];
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[[[NSUserDefaultsController sharedUserDefaultsController] defaults] removeObjectForKey:@"outputDevice"];
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}
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}
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else {
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[self setOutputDeviceWithDeviceDict:nil];
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}
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_deviceFormat = nil;
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[self updateDeviceFormat];
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__block dispatch_semaphore_t sema = _sema;
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__block OutputNode * outputController = self->outputController;
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__block float * volume = &self->volume;
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_au.outputProvider = ^AUAudioUnitStatus(AudioUnitRenderActionFlags * actionFlags, const AudioTimeStamp * timestamp, AUAudioFrameCount frameCount, NSInteger inputBusNumber, AudioBufferList * inputData)
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{
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void *readPointer = inputData->mBuffers[0].mData;
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int amountToRead, amountRead;
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amountToRead = inputData->mBuffers[0].mDataByteSize;
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if (self->stopping == YES || [outputController shouldContinue] == NO)
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{
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memset(readPointer, 0, amountToRead);
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self->stopping = YES;
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dispatch_semaphore_signal(sema);
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return 0;
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}
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amountRead = [outputController readData:(readPointer) amount:amountToRead];
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if ((amountRead < amountToRead) && [outputController endOfStream] == NO) //Try one more time! for track changes!
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{
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int amountRead2; //Use this since return type of readdata isnt known...may want to fix then can do a simple += to readdata
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amountRead2 = [outputController readData:(readPointer+amountRead) amount:amountToRead-amountRead];
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amountRead += amountRead2;
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}
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int framesRead = amountRead / sizeof(float);
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scale_by_volume((float*)readPointer, framesRead, *volume);
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if (amountRead < amountToRead)
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{
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// Either underrun, or no data at all. Caller output tends to just
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// buffer loop if it doesn't get anything, so always produce a full
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// buffer, and silence anything we couldn't supply.
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memset(readPointer + amountRead, 0, amountToRead - amountRead);
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}
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dispatch_semaphore_signal(sema);
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return 0;
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};
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[_au allocateRenderResourcesAndReturnError:&err];
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[NSThread detachNewThreadSelector:@selector(threadEntry:) toTarget:self withObject:nil];
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return (err == nil);
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}
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- (void)setVolume:(double)v
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{
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volume = v * 0.01f;
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}
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- (void)start
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{
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NSError *err;
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[_au startHardwareAndReturnError:&err];
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}
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- (void)stop
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{
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stopping = YES;
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if (listenerapplied) {
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AudioObjectPropertyAddress theAddress = {
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.mSelector = kAudioHardwarePropertyDefaultOutputDevice,
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.mScope = kAudioObjectPropertyScopeGlobal,
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.mElement = kAudioObjectPropertyElementMaster
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};
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AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &theAddress, default_device_changed, (__bridge void * _Nullable)(self));
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listenerapplied = NO;
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}
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if (_au) {
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[_au stopHardware];
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_au = nil;
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}
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if (running)
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while (!stopped)
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{
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stopping = YES;
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dispatch_semaphore_signal(_sema);
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usleep(500);
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}
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}
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- (void)dealloc
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{
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[self stop];
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[[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.outputDevice"];
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}
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- (void)pause
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{
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[_au stopHardware];
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}
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- (void)resume
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{
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NSError *err;
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[_au startHardwareAndReturnError:&err];
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}
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@end
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