String open (const BigInteger& inputChannels,
const BigInteger& outputChannels,
double sampleRate,
int bufferSize)
{
close();
lastError = String::empty;
preferredBufferSize = (bufferSize <= 0) ? getDefaultBufferSize() : bufferSize;
// xxx set up channel mapping
activeOutputChans = outputChannels;
activeOutputChans.setRange (2, activeOutputChans.getHighestBit(), false);
numOutputChannels = activeOutputChans.countNumberOfSetBits();
monoOutputChannelNumber = activeOutputChans.findNextSetBit (0);
activeInputChans = inputChannels;
activeInputChans.setRange (2, activeInputChans.getHighestBit(), false);
numInputChannels = activeInputChans.countNumberOfSetBits();
monoInputChannelNumber = activeInputChans.findNextSetBit (0);
AudioSessionSetActive (true);
UInt32 audioCategory = (numInputChannels > 0 && audioInputIsAvailable) ? kAudioSessionCategory_PlayAndRecord
: kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty (kAudioSessionProperty_AudioCategory, sizeof (audioCategory), &audioCategory);
if (audioCategory == kAudioSessionCategory_PlayAndRecord)
{
// (note: mustn't set this until after the audio category property has been set)
UInt32 allowBluetoothInput = 1;
AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryEnableBluetoothInput,
sizeof (allowBluetoothInput), &allowBluetoothInput);
}
AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange, routingChangedStatic, this);
fixAudioRouteIfSetToReceiver();
updateDeviceInfo();
Float32 bufferDuration = preferredBufferSize / sampleRate;
AudioSessionSetProperty (kAudioSessionProperty_PreferredHardwareIOBufferDuration, sizeof (bufferDuration), &bufferDuration);
actualBufferSize = preferredBufferSize;
prepareFloatBuffers (actualBufferSize);
isRunning = true;
routingChanged (nullptr); // creates and starts the AU
lastError = audioUnit != 0 ? "" : "Couldn't open the device";
return lastError;
}
String open (const BigInteger& inputChannelsWanted,
const BigInteger& outputChannelsWanted,
double targetSampleRate, int bufferSize) override
{
close();
lastError.clear();
preferredBufferSize = (bufferSize <= 0) ? getDefaultBufferSize() : bufferSize;
// xxx set up channel mapping
activeOutputChans = outputChannelsWanted;
activeOutputChans.setRange (2, activeOutputChans.getHighestBit(), false);
numOutputChannels = activeOutputChans.countNumberOfSetBits();
monoOutputChannelNumber = activeOutputChans.findNextSetBit (0);
activeInputChans = inputChannelsWanted;
activeInputChans.setRange (2, activeInputChans.getHighestBit(), false);
numInputChannels = activeInputChans.countNumberOfSetBits();
monoInputChannelNumber = activeInputChans.findNextSetBit (0);
AudioSessionSetActive (true);
if (numInputChannels > 0 && audioInputIsAvailable)
{
setSessionUInt32Property (kAudioSessionProperty_AudioCategory, kAudioSessionCategory_PlayAndRecord);
setSessionUInt32Property (kAudioSessionProperty_OverrideCategoryEnableBluetoothInput, 1);
}
else
{
setSessionUInt32Property (kAudioSessionProperty_AudioCategory, kAudioSessionCategory_MediaPlayback);
}
AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange, routingChangedStatic, this);
fixAudioRouteIfSetToReceiver();
updateDeviceInfo();
setSessionFloat64Property (kAudioSessionProperty_PreferredHardwareSampleRate, targetSampleRate);
updateSampleRates();
setSessionFloat64Property (kAudioSessionProperty_PreferredHardwareIOBufferDuration, preferredBufferSize / sampleRate);
updateCurrentBufferSize();
prepareFloatBuffers (actualBufferSize);
isRunning = true;
routingChanged (nullptr); // creates and starts the AU
lastError = audioUnit != 0 ? "" : "Couldn't open the device";
return lastError;
}
/*
*Audio Session Configuration.
* Requests an audio session from core audio and configures it for effects processing by default (one input, one output).
* <Sam> All major configurations are set for the AudioSession Instance here
*/
int MUEAudioIO::configureAudioSession()
{
try {
// Initialize and configure the audio session
AudioSessionInitialize(NULL, NULL, rioInterruptionListener, this);
AudioSessionSetActive(true);
//audio should not mix with iPod audio, and we want input and output.
UInt32 audioCategory = kAudioSessionCategory_PlayAndRecord;
//audio will mix with iPod audio, but we get output only (no input) with this type of session
//UInt32 audioCategory = kAudioSessionCategory_AmbientSound;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(audioCategory), &audioCategory);
// The entire purpose of the propListener is to detect a change in signal flow (headphones w/ mic or even third party device)
AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange, propListener, this);
//(TODO) make get/set preferred buffer size
// This value is in seconds! We want really low latency...
preferredBufferSize = .01; // .005 for buffer of 256, .01 for buffer of 512
AudioSessionSetProperty(kAudioSessionProperty_PreferredHardwareIOBufferDuration,
sizeof(preferredBufferSize), &preferredBufferSize);
// Related to our propListener. When the signal flow changes, sometimes the hardware sample rate can change. You'll notice in the propListener it checks for a new one.
UInt32 size = sizeof(hwSampleRate);
AudioSessionGetProperty(kAudioSessionProperty_CurrentHardwareSampleRate, &size, &hwSampleRate);
}
catch (...) {
printf("An unknown error occurred in audio session configuration!\n");
//if (url) CFRelease(url);
}
return 0;
}
sint_t aubio_audio_unit_init (aubio_audio_unit_t *o)
{
OSStatus err = noErr;
Float32 latency = o->latency;
Float64 samplerate = (Float64)o->samplerate;
o->au_ios_cb_struct.inputProc = aubio_audio_unit_process;
o->au_ios_cb_struct.inputProcRefCon = o;
/* setting up audio session with interruption listener */
err = AudioSessionInitialize(NULL, NULL, audio_unit_interruption_listener, o);
if (err) { AUBIO_ERR("audio_unit: could not initialize audio session (%d)\n", (int)err); goto fail; }
audio_unit_set_audio_session_category(o->input_enabled, o->verbose);
audio_unit_check_audio_route(o);
/* add route change listener */
err = AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange,
audio_unit_route_change_listener, o);
if (err) { AUBIO_ERR("audio_unit: could not set route change listener (%d)\n", (int)err); goto fail; }
/* set latency */
err = AudioSessionSetProperty(kAudioSessionProperty_PreferredHardwareIOBufferDuration,
sizeof(latency), &latency);
if (err) { AUBIO_ERR("audio_unit: could not set preferred latency (%d)\n", (int)err); goto fail; }
#if 0 // only for iphone OS >= 3.1
UInt32 val = 1; // set to 0 (default) to use ear speaker in voice application
err = AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker,
sizeof(UInt32), &val);
if (err) { AUBIO_ERR("audio_unit: could not set session property to default to speaker\n"); }
#endif
/* setting up audio unit */
AudioComponentDescription desc;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
desc.componentSubType = kAudioUnitSubType_RemoteIO;
desc.componentType = kAudioUnitType_Output;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
AudioStreamBasicDescription audioFormat;
/* look for a component that match the description */
AudioComponent comp = AudioComponentFindNext(NULL, &desc);
/* create the audio component */
AudioUnit *audio_unit = &(o->audio_unit);
err = AudioComponentInstanceNew(comp, &(o->audio_unit));
if (err) { AUBIO_ERR("audio_unit: failed creating the audio unit\n"); goto fail; }
/* enable IO */
UInt32 enabled = 1;
err = AudioUnitSetProperty (*audio_unit, kAudioOutputUnitProperty_EnableIO,
kAudioUnitScope_Input, 1, &enabled, sizeof(enabled));
if (err) {
AUBIO_ERR("audio_unit: failed enabling input of audio unit\n");
goto fail;
}
/* set max fps */
UInt32 max_fps = MIN(o->blocksize, MAX_FPS);
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_MaximumFramesPerSlice,
kAudioUnitScope_Global, 0, &max_fps, sizeof(max_fps));
if (err) {
AUBIO_ERR("audio_unit: could not set maximum frames per slice property (%d)\n", (int)err);
goto fail;
}
AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_SetRenderCallback,
kAudioUnitScope_Input, 0, &(o->au_ios_cb_struct), sizeof(o->au_ios_cb_struct));
if (err) { AUBIO_ERR("audio_unit: failed setting audio unit render callback\n"); goto fail; }
#if 0
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_SampleRate,
kAudioUnitScope_Input, 0, &samplerate, sizeof(Float64));
if (err) { AUBIO_ERR("audio_unit: could not set audio input sample rate\n"); goto fail; }
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_SampleRate,
kAudioUnitScope_Output, 1, &samplerate, sizeof(Float64));
if (err) { AUBIO_ERR("audio_unit: could not set audio input sample rate\n"); goto fail; }
#endif
audioFormat.mSampleRate = (Float64)samplerate;
audioFormat.mChannelsPerFrame = 2;
audioFormat.mFormatID = kAudioFormatLinearPCM;
audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked;
audioFormat.mFramesPerPacket = 1;
audioFormat.mBitsPerChannel = 8 * sizeof(SInt16);
#if 1 // interleaving
audioFormat.mBytesPerFrame = 2 * sizeof(SInt16);
audioFormat.mBytesPerPacket = 2 * sizeof(SInt16);
#else
audioFormat.mBytesPerPacket = audioFormat.mBytesPerFrame = sizeof(SInt32);
audioFormat.mFormatFlags |= kAudioFormatFlagIsNonInterleaved;
#endif
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &audioFormat, sizeof(audioFormat));
if (err) { AUBIO_ERR("audio_unit: could not set audio output format\n"); goto fail; }
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Output, 1, &audioFormat, sizeof(audioFormat));
if (err) { AUBIO_ERR("audio_unit: could not set audio input format\n"); goto fail; }
#if 0
AudioStreamBasicDescription thruFormat;
thissize = sizeof(thruFormat);
err = AudioUnitGetProperty (*audio_unit, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input, 0, &thruFormat, &thissize);
if (err) { AUBIO_ERR("audio_unit: could not get speaker output format, err: %d\n", (int)err); goto fail; }
err = AudioUnitSetProperty (*audio_unit, kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Output, 1, &thruFormat, sizeof(thruFormat));
if (err) { AUBIO_ERR("audio_unit: could not set input audio format, err: %d\n", (int)err); goto fail; }
#endif
/* time to initialize the unit */
err = AudioUnitInitialize(*audio_unit);
if (err) { AUBIO_ERR("audio_unit: failed initializing audio, err: %d\n", (int)err); goto fail; }
return 0;
fail:
return err;
}
int audiosess_alloc(struct audiosess_st **stp,
audiosess_int_h *inth, void *arg)
{
struct audiosess_st *st = NULL;
struct audiosess *as = NULL;
int err = 0;
bool created = false;
#if TARGET_OS_IPHONE
AudioSessionPropertyID id = kAudioSessionProperty_AudioRouteChange;
UInt32 category;
OSStatus ret;
#endif
if (!stp)
return EINVAL;
#if TARGET_OS_IPHONE
/* Must be done for all modules */
category = kAudioSessionCategory_PlayAndRecord;
ret = AudioSessionSetProperty(kAudioSessionProperty_AudioCategory,
sizeof(category), &category);
if (ret) {
re_fprintf(stderr, "Audio Category: %d\n", ret);
return EINVAL;
}
#endif
if (gas)
goto makesess;
as = mem_zalloc(sizeof(*as), destructor);
if (!as)
return ENOMEM;
#if TARGET_OS_IPHONE
ret = AudioSessionSetActive(true);
if (ret) {
re_fprintf(stderr, "AudioSessionSetActive: %d\n", ret);
err = ENOSYS;
goto out;
}
ret = AudioSessionAddPropertyListener(id, propListener, as);
if (ret) {
re_fprintf(stderr, "AudioSessionAddPropertyListener: %d\n",
ret);
err = EINVAL;
goto out;
}
#endif
gas = as;
created = true;
makesess:
st = mem_zalloc(sizeof(*st), sess_destructor);
if (!st) {
err = ENOMEM;
goto out;
}
st->inth = inth;
st->arg = arg;
st->as = created ? gas : mem_ref(gas);
list_append(&gas->sessl, &st->le, st);
out:
if (err) {
mem_deref(as);
mem_deref(st);
}
else {
*stp = st;
}
return err;
}
