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iOS: Made it clear that the "Audio Background Capability" setting must be enabled for MidiInput/Output::createNewDevice() to succeed

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This commit is contained in:
ed 2019-04-03 16:59:51 +01:00
parent 132295bdb3
commit 251ec6daa8
3 changed files with 34 additions and 3 deletions
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3
extras/Projucer/Source/ProjectSaving/jucer_ProjectExport_Xcode.h
View file

@ -334,7 +334,8 @@ public:
if (iOS)
{
props.add (new ChoicePropertyComponent (iosBackgroundAudioValue, "Audio Background Capability"),
"Enable this to grant your app the capability to access audio when in background mode.");
"Enable this to grant your app the capability to access audio when in background mode. "
"This permission is required if your app creates a MIDI input or output device.");
props.add (new ChoicePropertyComponent (iosBackgroundBleValue, "Bluetooth MIDI Background Capability"),
"Enable this to grant your app the capability to connect to Bluetooth LE devices when in background mode.");

6
modules/juce_audio_devices/midi_io/juce_MidiDevices.h
View file

@ -112,6 +112,9 @@ public:
This will attempt to create a new midi input device with the specified name for other
apps to connect to.
NB - if you are calling this method on iOS you must have enabled the "Audio Background Capability"
setting in the iOS exporter otherwise this method will fail.
Returns nullptr if a device can't be created.
@param deviceName the name of the device to create
@ -265,6 +268,9 @@ public:
This will attempt to create a new midi output device with the specified name that other
apps can connect to and use as their midi input.
NB - if you are calling this method on iOS you must have enabled the "Audio Background Capability"
setting in the iOS exporter otherwise this method will fail.
Returns nullptr if a device can't be created.
@param deviceName the name of the device to create

28
modules/juce_audio_devices/native/juce_mac_CoreMidi.cpp
View file

@ -459,7 +459,19 @@ MidiInput* MidiInput::createNewDevice (const String& deviceName, MidiInputCallba
MIDIEndpointRef endpoint;
ScopedCFString name (deviceName);
if (CHECK_ERROR (MIDIDestinationCreate (client, name.cfString, midiInputProc, mpc.get(), &endpoint)))
auto err = MIDIDestinationCreate (client, name.cfString, midiInputProc, mpc.get(), &endpoint);
#if JUCE_IOS
if (err == kMIDINotPermitted)
{
// If you've hit this assertion then you probably haven't enabled the "Audio Background Capability"
// setting in the iOS exporter for your app - this is required if you want to create a MIDI device!
jassertfalse;
return nullptr;
}
#endif
if (CHECK_ERROR (err))
{
auto deviceIdentifier = createUniqueIDForMidiPort (deviceName, true);
@ -582,7 +594,19 @@ MidiOutput* MidiOutput::createNewDevice (const String& deviceName)
ScopedCFString name (deviceName);
if (CHECK_ERROR (MIDISourceCreate (client, name.cfString, &endpoint)))
auto err = MIDISourceCreate (client, name.cfString, &endpoint);
#if JUCE_IOS
if (err == kMIDINotPermitted)
{
// If you've hit this assertion then you probably haven't enabled the "Audio Background Capability"
// setting in the iOS exporter for your app - this is required if you want to create a MIDI device!
jassertfalse;
return nullptr;
}
#endif
if (CHECK_ERROR (err))
{
auto deviceIdentifier = createUniqueIDForMidiPort (deviceName, true);