/
juce_Audio_ios.cpp
1507 lines (1188 loc) · 57 KB
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juce_Audio_ios.cpp
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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
class iOSAudioIODevice;
constexpr const char* const iOSAudioDeviceName = "iOS Audio";
#ifndef JUCE_IOS_AUDIO_EXPLICIT_SAMPLERATES
#define JUCE_IOS_AUDIO_EXPLICIT_SAMPLERATES
#endif
constexpr std::initializer_list<double> iOSExplicitSampleRates { JUCE_IOS_AUDIO_EXPLICIT_SAMPLERATES };
//==============================================================================
struct AudioSessionHolder
{
AudioSessionHolder();
~AudioSessionHolder();
void handleStatusChange (bool enabled, const char* reason) const;
void handleRouteChange (AVAudioSessionRouteChangeReason reason);
Array<iOSAudioIODevice::Pimpl*> activeDevices;
Array<iOSAudioIODeviceType*> activeDeviceTypes;
id nativeSession;
};
static const char* getRoutingChangeReason (AVAudioSessionRouteChangeReason reason) noexcept
{
switch (reason)
{
case AVAudioSessionRouteChangeReasonNewDeviceAvailable: return "New device available";
case AVAudioSessionRouteChangeReasonOldDeviceUnavailable: return "Old device unavailable";
case AVAudioSessionRouteChangeReasonCategoryChange: return "Category change";
case AVAudioSessionRouteChangeReasonOverride: return "Override";
case AVAudioSessionRouteChangeReasonWakeFromSleep: return "Wake from sleep";
case AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory: return "No suitable route for category";
case AVAudioSessionRouteChangeReasonRouteConfigurationChange: return "Route configuration change";
case AVAudioSessionRouteChangeReasonUnknown:
default: return "Unknown";
}
}
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wmissing-prototypes")
bool getNotificationValueForKey (NSNotification* notification, NSString* key, NSUInteger& value) noexcept
{
if (notification != nil)
{
if (NSDictionary* userInfo = [notification userInfo])
{
if (NSNumber* number = [userInfo objectForKey: key])
{
value = [number unsignedIntegerValue];
return true;
}
}
}
jassertfalse;
return false;
}
JUCE_END_IGNORE_WARNINGS_GCC_LIKE
} // namespace juce
//==============================================================================
@interface iOSAudioSessionNative : NSObject
{
@private
juce::AudioSessionHolder* audioSessionHolder;
};
- (id) init: (juce::AudioSessionHolder*) holder;
- (void) dealloc;
- (void) audioSessionChangedInterruptionType: (NSNotification*) notification;
- (void) handleMediaServicesReset;
- (void) handleMediaServicesLost;
- (void) handleRouteChange: (NSNotification*) notification;
@end
@implementation iOSAudioSessionNative
- (id) init: (juce::AudioSessionHolder*) holder
{
self = [super init];
if (self != nil)
{
audioSessionHolder = holder;
auto session = [AVAudioSession sharedInstance];
auto centre = [NSNotificationCenter defaultCenter];
[centre addObserver: self
selector: @selector (audioSessionChangedInterruptionType:)
name: AVAudioSessionInterruptionNotification
object: session];
[centre addObserver: self
selector: @selector (handleMediaServicesLost)
name: AVAudioSessionMediaServicesWereLostNotification
object: session];
[centre addObserver: self
selector: @selector (handleMediaServicesReset)
name: AVAudioSessionMediaServicesWereResetNotification
object: session];
[centre addObserver: self
selector: @selector (handleRouteChange:)
name: AVAudioSessionRouteChangeNotification
object: session];
}
else
{
jassertfalse;
}
return self;
}
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver: self];
[super dealloc];
}
- (void) audioSessionChangedInterruptionType: (NSNotification*) notification
{
NSUInteger value;
if (juce::getNotificationValueForKey (notification, AVAudioSessionInterruptionTypeKey, value))
{
switch ((AVAudioSessionInterruptionType) value)
{
case AVAudioSessionInterruptionTypeBegan:
audioSessionHolder->handleStatusChange (false, "AVAudioSessionInterruptionTypeBegan");
break;
case AVAudioSessionInterruptionTypeEnded:
audioSessionHolder->handleStatusChange (true, "AVAudioSessionInterruptionTypeEnded");
break;
// No default so the code doesn't compile if this enum is extended.
}
}
}
- (void) handleMediaServicesReset
{
audioSessionHolder->handleStatusChange (true, "AVAudioSessionMediaServicesWereResetNotification");
}
- (void) handleMediaServicesLost
{
audioSessionHolder->handleStatusChange (false, "AVAudioSessionMediaServicesWereLostNotification");
}
- (void) handleRouteChange: (NSNotification*) notification
{
NSUInteger value;
if (juce::getNotificationValueForKey (notification, AVAudioSessionRouteChangeReasonKey, value))
audioSessionHolder->handleRouteChange ((AVAudioSessionRouteChangeReason) value);
}
@end
//==============================================================================
namespace juce {
#ifndef JUCE_IOS_AUDIO_LOGGING
#define JUCE_IOS_AUDIO_LOGGING 0
#endif
#if JUCE_IOS_AUDIO_LOGGING
#define JUCE_IOS_AUDIO_LOG(x) DBG(x)
#else
#define JUCE_IOS_AUDIO_LOG(x)
#endif
static void logNSError (NSError* e)
{
if (e != nil)
{
JUCE_IOS_AUDIO_LOG ("iOS Audio error: " << [e.localizedDescription UTF8String]);
jassertfalse;
}
}
#define JUCE_NSERROR_CHECK(X) { NSError* error = nil; X; logNSError (error); }
//==============================================================================
class iOSAudioIODeviceType final : public AudioIODeviceType,
public AsyncUpdater
{
public:
iOSAudioIODeviceType();
~iOSAudioIODeviceType() override;
void scanForDevices() override;
StringArray getDeviceNames (bool) const override;
int getDefaultDeviceIndex (bool) const override;
int getIndexOfDevice (AudioIODevice*, bool) const override;
bool hasSeparateInputsAndOutputs() const override;
AudioIODevice* createDevice (const String&, const String&) override;
private:
void handleRouteChange (AVAudioSessionRouteChangeReason);
void handleAsyncUpdate() override;
friend struct AudioSessionHolder;
friend struct iOSAudioIODevice::Pimpl;
SharedResourcePointer<AudioSessionHolder> sessionHolder;
JUCE_DECLARE_WEAK_REFERENCEABLE (iOSAudioIODeviceType)
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (iOSAudioIODeviceType)
};
//==============================================================================
struct iOSAudioIODevice::Pimpl final : public AsyncUpdater
{
Pimpl (iOSAudioIODeviceType* ioDeviceType, iOSAudioIODevice& ioDevice)
: deviceType (ioDeviceType),
owner (ioDevice)
{
JUCE_IOS_AUDIO_LOG ("Creating iOS audio device");
// We need to activate the audio session here to obtain the available sample rates and buffer sizes,
// but if we don't set a category first then background audio will always be stopped. This category
// may be changed later.
setAudioSessionCategory (AVAudioSessionCategoryPlayAndRecord);
setAudioSessionActive (true);
updateHardwareInfo();
channelData.reconfigure ({}, {});
setAudioSessionActive (false);
sessionHolder->activeDevices.add (this);
}
~Pimpl() override
{
sessionHolder->activeDevices.removeFirstMatchingValue (this);
close();
}
static void setAudioSessionCategory (NSString* category)
{
NSUInteger options = 0;
#if ! JUCE_DISABLE_AUDIO_MIXING_WITH_OTHER_APPS
options |= AVAudioSessionCategoryOptionMixWithOthers; // Alternatively AVAudioSessionCategoryOptionDuckOthers
#endif
if (category == AVAudioSessionCategoryPlayAndRecord)
{
options |= AVAudioSessionCategoryOptionDefaultToSpeaker
| AVAudioSessionCategoryOptionAllowBluetooth
| AVAudioSessionCategoryOptionAllowAirPlay;
if (@available (iOS 10.0, *))
options |= AVAudioSessionCategoryOptionAllowBluetoothA2DP;
}
JUCE_NSERROR_CHECK ([[AVAudioSession sharedInstance] setCategory: category
withOptions: options
error: &error]);
}
static void setAudioSessionActive (bool enabled)
{
JUCE_NSERROR_CHECK ([[AVAudioSession sharedInstance] setActive: enabled
error: &error]);
}
int getBufferSize (const double currentSampleRate)
{
return roundToInt (currentSampleRate * [AVAudioSession sharedInstance].IOBufferDuration);
}
int tryBufferSize (const double currentSampleRate, const int newBufferSize)
{
NSTimeInterval bufferDuration = currentSampleRate > 0 ? (NSTimeInterval) ((newBufferSize + 1) / currentSampleRate) : 0.0;
auto session = [AVAudioSession sharedInstance];
JUCE_NSERROR_CHECK ([session setPreferredIOBufferDuration: bufferDuration
error: &error]);
return getBufferSize (currentSampleRate);
}
void updateAvailableBufferSizes()
{
availableBufferSizes.clear();
auto newBufferSize = tryBufferSize (sampleRate, 64);
jassert (newBufferSize > 0);
const auto longestBufferSize = tryBufferSize (sampleRate, 4096);
while (newBufferSize <= longestBufferSize)
{
availableBufferSizes.add (newBufferSize);
newBufferSize *= 2;
}
// Sometimes the largest supported buffer size is not a power of 2
availableBufferSizes.addIfNotAlreadyThere (longestBufferSize);
bufferSize = tryBufferSize (sampleRate, bufferSize);
#if JUCE_IOS_AUDIO_LOGGING
{
String info ("Available buffer sizes:");
for (auto size : availableBufferSizes)
info << " " << size;
JUCE_IOS_AUDIO_LOG (info);
}
#endif
JUCE_IOS_AUDIO_LOG ("Buffer size after detecting available buffer sizes: " << bufferSize);
}
double trySampleRate (double rate)
{
auto session = [AVAudioSession sharedInstance];
JUCE_NSERROR_CHECK ([session setPreferredSampleRate: rate
error: &error]);
return session.sampleRate;
}
// Important: the supported audio sample rates change on the iPhone 6S
// depending on whether the headphones are plugged in or not!
void updateAvailableSampleRates()
{
if (iOSExplicitSampleRates.size() != 0)
{
availableSampleRates = Array<double> (iOSExplicitSampleRates);
return;
}
availableSampleRates.clear();
AudioUnitRemovePropertyListenerWithUserData (audioUnit,
kAudioUnitProperty_StreamFormat,
dispatchAudioUnitPropertyChange,
this);
const double lowestRate = trySampleRate (4000);
availableSampleRates.add (lowestRate);
const double highestRate = trySampleRate (192000);
JUCE_IOS_AUDIO_LOG ("Lowest supported sample rate: " << lowestRate);
JUCE_IOS_AUDIO_LOG ("Highest supported sample rate: " << highestRate);
for (double rate = lowestRate + 1000; rate < highestRate; rate += 1000)
{
const double supportedRate = trySampleRate (rate);
JUCE_IOS_AUDIO_LOG ("Trying a sample rate of " << rate << ", got " << supportedRate);
availableSampleRates.addIfNotAlreadyThere (supportedRate);
rate = jmax (rate, supportedRate);
}
availableSampleRates.addIfNotAlreadyThere (highestRate);
// Restore the original values.
sampleRate = trySampleRate (sampleRate);
bufferSize = tryBufferSize (sampleRate, bufferSize);
AudioUnitAddPropertyListener (audioUnit,
kAudioUnitProperty_StreamFormat,
dispatchAudioUnitPropertyChange,
this);
// Check the current stream format in case things have changed whilst we
// were going through the sample rates
handleStreamFormatChange();
#if JUCE_IOS_AUDIO_LOGGING
{
String info ("Available sample rates:");
for (auto rate : availableSampleRates)
info << " " << rate;
JUCE_IOS_AUDIO_LOG (info);
}
#endif
JUCE_IOS_AUDIO_LOG ("Sample rate after detecting available sample rates: " << sampleRate);
}
void updateHardwareInfo (bool forceUpdate = false)
{
if (! forceUpdate && ! hardwareInfoNeedsUpdating.compareAndSetBool (false, true))
return;
JUCE_IOS_AUDIO_LOG ("Updating hardware info");
updateAvailableSampleRates();
updateAvailableBufferSizes();
if (deviceType != nullptr)
deviceType->callDeviceChangeListeners();
}
void setTargetSampleRateAndBufferSize()
{
JUCE_IOS_AUDIO_LOG ("Setting target sample rate: " << targetSampleRate);
sampleRate = trySampleRate (targetSampleRate);
JUCE_IOS_AUDIO_LOG ("Actual sample rate: " << sampleRate);
JUCE_IOS_AUDIO_LOG ("Setting target buffer size: " << targetBufferSize);
bufferSize = tryBufferSize (sampleRate, targetBufferSize);
JUCE_IOS_AUDIO_LOG ("Actual buffer size: " << bufferSize);
}
String open (const BigInteger& inputChannelsWanted,
const BigInteger& outputChannelsWanted,
double sampleRateWanted, int bufferSizeWanted)
{
close();
firstHostTime = true;
lastNumFrames = 0;
xrun = 0;
lastError.clear();
requestedInputChannels = inputChannelsWanted;
requestedOutputChannels = outputChannelsWanted;
targetSampleRate = sampleRateWanted;
targetBufferSize = bufferSizeWanted > 0 ? bufferSizeWanted : defaultBufferSize;
JUCE_IOS_AUDIO_LOG ("Opening audio device:"
<< " inputChannelsWanted: " << requestedInputChannels .toString (2)
<< ", outputChannelsWanted: " << requestedOutputChannels.toString (2)
<< ", targetSampleRate: " << targetSampleRate
<< ", targetBufferSize: " << targetBufferSize);
setAudioSessionActive (true);
setAudioSessionCategory (requestedInputChannels > 0 ? AVAudioSessionCategoryPlayAndRecord
: AVAudioSessionCategoryPlayback);
channelData.reconfigure (requestedInputChannels, requestedOutputChannels);
updateHardwareInfo (true);
setTargetSampleRateAndBufferSize();
fixAudioRouteIfSetToReceiver();
isRunning = true;
if (! createAudioUnit())
{
lastError = "Couldn't open the device";
return lastError;
}
const ScopedLock sl (callbackLock);
AudioOutputUnitStart (audioUnit);
if (callback != nullptr)
callback->audioDeviceAboutToStart (&owner);
return lastError;
}
void close()
{
stop();
if (isRunning)
{
isRunning = false;
if (audioUnit != nullptr)
{
AudioOutputUnitStart (audioUnit);
AudioComponentInstanceDispose (audioUnit);
audioUnit = nullptr;
}
setAudioSessionActive (false);
}
}
void start (AudioIODeviceCallback* newCallback)
{
if (isRunning && callback != newCallback)
{
if (newCallback != nullptr)
newCallback->audioDeviceAboutToStart (&owner);
const ScopedLock sl (callbackLock);
callback = newCallback;
}
}
void stop()
{
if (isRunning)
{
AudioIODeviceCallback* lastCallback;
{
const ScopedLock sl (callbackLock);
lastCallback = callback;
callback = nullptr;
}
if (lastCallback != nullptr)
lastCallback->audioDeviceStopped();
}
}
bool setAudioPreprocessingEnabled (bool enable)
{
auto session = [AVAudioSession sharedInstance];
NSString* mode = (enable ? AVAudioSessionModeDefault
: AVAudioSessionModeMeasurement);
JUCE_NSERROR_CHECK ([session setMode: mode
error: &error]);
return session.mode == mode;
}
//==============================================================================
class PlayHead final : public AudioPlayHead
{
public:
explicit PlayHead (Pimpl& implIn) : impl (implIn) {}
bool canControlTransport() override { return canControlTransportImpl(); }
void transportPlay (bool shouldSartPlaying) override
{
if (! canControlTransport())
return;
HostCallbackInfo callbackInfo;
impl.fillHostCallbackInfo (callbackInfo);
Boolean hostIsPlaying = NO;
[[maybe_unused]] OSStatus err = callbackInfo.transportStateProc2 (callbackInfo.hostUserData,
&hostIsPlaying,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr);
jassert (err == noErr);
if (hostIsPlaying != shouldSartPlaying)
impl.handleAudioTransportEvent (kAudioUnitRemoteControlEvent_TogglePlayPause);
}
void transportRecord (bool shouldStartRecording) override
{
if (! canControlTransport())
return;
HostCallbackInfo callbackInfo;
impl.fillHostCallbackInfo (callbackInfo);
Boolean hostIsRecording = NO;
[[maybe_unused]] OSStatus err = callbackInfo.transportStateProc2 (callbackInfo.hostUserData,
nullptr,
&hostIsRecording,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr);
jassert (err == noErr);
if (hostIsRecording != shouldStartRecording)
impl.handleAudioTransportEvent (kAudioUnitRemoteControlEvent_ToggleRecord);
}
void transportRewind() override
{
if (canControlTransport())
impl.handleAudioTransportEvent (kAudioUnitRemoteControlEvent_Rewind);
}
Optional<PositionInfo> getPosition() const override
{
if (! canControlTransportImpl())
return {};
HostCallbackInfo callbackInfo;
impl.fillHostCallbackInfo (callbackInfo);
if (callbackInfo.hostUserData == nullptr)
return {};
Boolean hostIsPlaying = NO;
Boolean hostIsRecording = NO;
Float64 hostCurrentSampleInTimeLine = 0;
Boolean hostIsCycling = NO;
Float64 hostCycleStartBeat = 0;
Float64 hostCycleEndBeat = 0;
auto transportErr = callbackInfo.transportStateProc2 (callbackInfo.hostUserData,
&hostIsPlaying,
&hostIsRecording,
nullptr,
&hostCurrentSampleInTimeLine,
&hostIsCycling,
&hostCycleStartBeat,
&hostCycleEndBeat);
if (transportErr == kAUGraphErr_CannotDoInCurrentContext)
return {};
jassert (transportErr == noErr);
PositionInfo result;
result.setTimeInSamples ((int64) hostCurrentSampleInTimeLine);
result.setIsPlaying (hostIsPlaying);
result.setIsRecording (hostIsRecording);
result.setIsLooping (hostIsCycling);
result.setLoopPoints (LoopPoints { hostCycleStartBeat, hostCycleEndBeat });
result.setTimeInSeconds ((double) *result.getTimeInSamples() / impl.sampleRate);
Float64 hostBeat = 0;
Float64 hostTempo = 0;
[[maybe_unused]] auto batErr = callbackInfo.beatAndTempoProc (callbackInfo.hostUserData,
&hostBeat,
&hostTempo);
jassert (batErr == noErr);
result.setPpqPosition (hostBeat);
result.setBpm (hostTempo);
Float32 hostTimeSigNumerator = 0;
UInt32 hostTimeSigDenominator = 0;
Float64 hostCurrentMeasureDownBeat = 0;
[[maybe_unused]] auto timeErr = callbackInfo.musicalTimeLocationProc (callbackInfo.hostUserData,
nullptr,
&hostTimeSigNumerator,
&hostTimeSigDenominator,
&hostCurrentMeasureDownBeat);
jassert (timeErr == noErr);
result.setPpqPositionOfLastBarStart (hostCurrentMeasureDownBeat);
result.setTimeSignature (TimeSignature { (int) hostTimeSigNumerator, (int) hostTimeSigDenominator });
result.setFrameRate (AudioPlayHead::fpsUnknown);
return result;
}
private:
bool canControlTransportImpl() const { return impl.interAppAudioConnected; }
Pimpl& impl;
};
//==============================================================================
#if JUCE_MODULE_AVAILABLE_juce_graphics
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wdeprecated-declarations")
Image getIcon (int size)
{
#if TARGET_OS_MACCATALYST
if (@available (macCatalyst 14.0, *))
#endif
{
if (interAppAudioConnected)
{
if (UIImage* hostUIImage = AudioOutputUnitGetHostIcon (audioUnit, (float) size))
return juce_createImageFromUIImage (hostUIImage);
}
}
return {};
}
JUCE_END_IGNORE_WARNINGS_GCC_LIKE
#endif
void switchApplication()
{
if (! interAppAudioConnected)
return;
CFURLRef hostUrl;
UInt32 dataSize = sizeof (hostUrl);
OSStatus err = AudioUnitGetProperty (audioUnit,
kAudioUnitProperty_PeerURL,
kAudioUnitScope_Global,
0,
&hostUrl,
&dataSize);
if (err == noErr)
{
if (@available (iOS 10.0, *))
{
[[UIApplication sharedApplication] openURL: (NSURL*) hostUrl
options: @{}
completionHandler: nil];
return;
}
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wdeprecated-declarations")
[[UIApplication sharedApplication] openURL: (NSURL*) hostUrl];
JUCE_END_IGNORE_WARNINGS_GCC_LIKE
}
}
//==============================================================================
void invokeAudioDeviceErrorCallback (const String& reason)
{
const ScopedLock sl (callbackLock);
if (callback != nullptr)
callback->audioDeviceError (reason);
}
void handleStatusChange (bool enabled, const char* reason)
{
const ScopedLock myScopedLock (callbackLock);
JUCE_IOS_AUDIO_LOG ("handleStatusChange: enabled: " << (int) enabled << ", reason: " << reason);
isRunning = enabled;
setAudioSessionActive (enabled);
if (enabled)
AudioOutputUnitStart (audioUnit);
else
AudioOutputUnitStop (audioUnit);
if (! enabled)
invokeAudioDeviceErrorCallback (reason);
}
void handleRouteChange (AVAudioSessionRouteChangeReason reason)
{
const ScopedLock myScopedLock (callbackLock);
const String reasonString (getRoutingChangeReason (reason));
JUCE_IOS_AUDIO_LOG ("handleRouteChange: " << reasonString);
if (isRunning)
invokeAudioDeviceErrorCallback (reasonString);
switch (reason)
{
case AVAudioSessionRouteChangeReasonCategoryChange:
case AVAudioSessionRouteChangeReasonRouteConfigurationChange:
break;
case AVAudioSessionRouteChangeReasonOverride:
case AVAudioSessionRouteChangeReasonUnknown:
case AVAudioSessionRouteChangeReasonNewDeviceAvailable:
case AVAudioSessionRouteChangeReasonOldDeviceUnavailable:
case AVAudioSessionRouteChangeReasonWakeFromSleep:
case AVAudioSessionRouteChangeReasonNoSuitableRouteForCategory:
{
hardwareInfoNeedsUpdating = true;
triggerAsyncUpdate();
break;
}
// No default so the code doesn't compile if this enum is extended.
}
}
void handleAudioUnitPropertyChange (AudioUnit,
AudioUnitPropertyID propertyID,
[[maybe_unused]] AudioUnitScope scope,
[[maybe_unused]] AudioUnitElement element)
{
JUCE_IOS_AUDIO_LOG ("handleAudioUnitPropertyChange: propertyID: " << String (propertyID)
<< " scope: " << String (scope)
<< " element: " << String (element));
switch (propertyID)
{
case kAudioUnitProperty_IsInterAppConnected:
handleInterAppAudioConnectionChange();
return;
case kAudioUnitProperty_StreamFormat:
handleStreamFormatChange();
return;
default:
jassertfalse;
}
}
void handleInterAppAudioConnectionChange()
{
UInt32 connected;
UInt32 dataSize = sizeof (connected);
[[maybe_unused]] OSStatus err = AudioUnitGetProperty (audioUnit, kAudioUnitProperty_IsInterAppConnected,
kAudioUnitScope_Global, 0, &connected, &dataSize);
jassert (err == noErr);
JUCE_IOS_AUDIO_LOG ("handleInterAppAudioConnectionChange: " << (connected ? "connected"
: "disconnected"));
if (connected != interAppAudioConnected)
{
const ScopedLock myScopedLock (callbackLock);
interAppAudioConnected = connected;
UIApplicationState appstate = [UIApplication sharedApplication].applicationState;
bool inForeground = (appstate != UIApplicationStateBackground);
if (interAppAudioConnected || inForeground)
{
setAudioSessionActive (true);
AudioOutputUnitStart (audioUnit);
if (callback != nullptr)
callback->audioDeviceAboutToStart (&owner);
}
else if (! inForeground)
{
AudioOutputUnitStop (audioUnit);
setAudioSessionActive (false);
if (callback != nullptr)
callback->audioDeviceStopped();
}
}
}
//==============================================================================
OSStatus process (AudioUnitRenderActionFlags* flags, const AudioTimeStamp* time,
const UInt32 numFrames, AudioBufferList* data)
{
OSStatus err = noErr;
recordXruns (time, numFrames);
const bool useInput = channelData.areInputChannelsAvailable();
if (useInput)
err = AudioUnitRender (audioUnit, flags, time, 1, numFrames, data);
const auto channelDataSize = sizeof (float) * numFrames;
const ScopedTryLock stl (callbackLock);
if (stl.isLocked() && callback != nullptr)
{
if ((int) numFrames > channelData.getFloatBufferSize())
channelData.setFloatBufferSize ((int) numFrames);
float* const* const inputData = channelData.audioData.getArrayOfWritePointers();
float* const* const outputData = inputData + channelData.inputs->numActiveChannels;
if (useInput)
{
for (int c = 0; c < channelData.inputs->numActiveChannels; ++c)
{
auto channelIndex = channelData.inputs->activeChannelIndices[c];
memcpy (inputData[c], (float*) data->mBuffers[channelIndex].mData, channelDataSize);
}
}
else
{
for (int c = 0; c < channelData.inputs->numActiveChannels; ++c)
zeromem (inputData[c], channelDataSize);
}
const auto nanos = time != nullptr ? timeConversions.hostTimeToNanos (time->mHostTime) : 0;
callback->audioDeviceIOCallbackWithContext ((const float**) inputData,
channelData.inputs ->numActiveChannels,
outputData,
channelData.outputs->numActiveChannels,
(int) numFrames,
{ (time != nullptr && (time->mFlags & kAudioTimeStampHostTimeValid) != 0) ? &nanos : nullptr });
for (int c = 0; c < channelData.outputs->numActiveChannels; ++c)
{
auto channelIndex = channelData.outputs->activeChannelIndices[c];
memcpy (data->mBuffers[channelIndex].mData, outputData[c], channelDataSize);
}
for (auto c : channelData.outputs->inactiveChannelIndices)
zeromem (data->mBuffers[c].mData, channelDataSize);
}
else
{
for (uint32 c = 0; c < data->mNumberBuffers; ++c)
zeromem (data->mBuffers[c].mData, channelDataSize);
}
return err;
}
void recordXruns (const AudioTimeStamp* time, UInt32 numFrames)
{
if (time != nullptr && (time->mFlags & kAudioTimeStampSampleTimeValid) != 0)
{
if (! firstHostTime)
{
if (! approximatelyEqual ((time->mSampleTime - lastSampleTime), (double) lastNumFrames))
xrun++;
}
else
firstHostTime = false;
lastSampleTime = time->mSampleTime;
}
else
firstHostTime = true;
lastNumFrames = numFrames;
}
//==============================================================================
static OSStatus processStatic (void* client, AudioUnitRenderActionFlags* flags, const AudioTimeStamp* time,
UInt32 /*busNumber*/, UInt32 numFrames, AudioBufferList* data)
{
return static_cast<Pimpl*> (client)->process (flags, time, numFrames, data);
}
//==============================================================================
bool createAudioUnit()
{
JUCE_IOS_AUDIO_LOG ("Creating the audio unit");
if (audioUnit != nullptr)
{
AudioComponentInstanceDispose (audioUnit);
audioUnit = nullptr;
}
AudioComponentDescription desc;
desc.componentType = kAudioUnitType_Output;
desc.componentSubType = kAudioUnitSubType_RemoteIO;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
AudioComponent comp = AudioComponentFindNext (nullptr, &desc);
AudioComponentInstanceNew (comp, &audioUnit);
if (audioUnit == nullptr)
return false;
#if JucePlugin_Enable_IAA
AudioComponentDescription appDesc;
appDesc.componentType = JucePlugin_IAAType;
appDesc.componentSubType = JucePlugin_IAASubType;
appDesc.componentManufacturer = JucePlugin_ManufacturerCode;
appDesc.componentFlags = 0;
appDesc.componentFlagsMask = 0;
OSStatus err = AudioOutputUnitPublish (&appDesc,
CFSTR (JucePlugin_IAAName),
JucePlugin_VersionCode,
audioUnit);
// This assert will be hit if the Inter-App Audio entitlement has not
// been enabled, or the description being published with
// AudioOutputUnitPublish is different from any in the AudioComponents
// array in this application's .plist file.
jassert (err == noErr);
err = AudioUnitAddPropertyListener (audioUnit,
kAudioUnitProperty_IsInterAppConnected,