JackCoreAudioDriver.cpp 63.8 KB
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/*
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Copyright (C) 2004-2008 Grame
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "JackCoreAudioDriver.h"
#include "JackEngineControl.h"
#include "JackMachThread.h"
#include "JackGraphManager.h"
#include "JackError.h"
#include "JackClientControl.h"
#include "JackDriverLoader.h"
#include "JackGlobals.h"
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#include "JackTools.h"
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#include "JackCompilerDeps.h"
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#include <iostream>
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#include <CoreServices/CoreServices.h>
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#include <CoreFoundation/CFNumber.h>
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namespace Jack
{

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static void Print4CharCode(const char* msg, long c)
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{
    UInt32 __4CC_number = (c);
    char __4CC_string[5];
    *((SInt32*)__4CC_string) = EndianU32_NtoB(__4CC_number);		
    __4CC_string[4] = 0;
    jack_log("%s'%s'", (msg), __4CC_string);
}

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static void printError(OSStatus err)
{
    switch (err) {
        case kAudioHardwareNoError:
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            jack_log("error code : kAudioHardwareNoError");
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            break;
        case kAudioConverterErr_FormatNotSupported:
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            jack_log("error code : kAudioConverterErr_FormatNotSupported");
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            break;
        case kAudioConverterErr_OperationNotSupported:
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            jack_log("error code : kAudioConverterErr_OperationNotSupported");
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            break;
        case kAudioConverterErr_PropertyNotSupported:
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            jack_log("error code : kAudioConverterErr_PropertyNotSupported");
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            break;
        case kAudioConverterErr_InvalidInputSize:
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            jack_log("error code : kAudioConverterErr_InvalidInputSize");
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            break;
        case kAudioConverterErr_InvalidOutputSize:
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            jack_log("error code : kAudioConverterErr_InvalidOutputSize");
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            break;
        case kAudioConverterErr_UnspecifiedError:
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            jack_log("error code : kAudioConverterErr_UnspecifiedError");
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            break;
        case kAudioConverterErr_BadPropertySizeError:
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            jack_log("error code : kAudioConverterErr_BadPropertySizeError");
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            break;
        case kAudioConverterErr_RequiresPacketDescriptionsError:
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            jack_log("error code : kAudioConverterErr_RequiresPacketDescriptionsError");
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            break;
        case kAudioConverterErr_InputSampleRateOutOfRange:
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            jack_log("error code : kAudioConverterErr_InputSampleRateOutOfRange");
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            break;
        case kAudioConverterErr_OutputSampleRateOutOfRange:
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            jack_log("error code : kAudioConverterErr_OutputSampleRateOutOfRange");
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            break;
        case kAudioHardwareNotRunningError:
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            jack_log("error code : kAudioHardwareNotRunningError");
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            break;
        case kAudioHardwareUnknownPropertyError:
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            jack_log("error code : kAudioHardwareUnknownPropertyError");
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            break;
        case kAudioHardwareIllegalOperationError:
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            jack_log("error code : kAudioHardwareIllegalOperationError");
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            break;
        case kAudioHardwareBadDeviceError:
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            jack_log("error code : kAudioHardwareBadDeviceError");
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            break;
        case kAudioHardwareBadStreamError:
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            jack_log("error code : kAudioHardwareBadStreamError");
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            break;
        case kAudioDeviceUnsupportedFormatError:
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            jack_log("error code : kAudioDeviceUnsupportedFormatError");
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            break;
        case kAudioDevicePermissionsError:
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            jack_log("error code : kAudioDevicePermissionsError");
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            break;
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        case kAudioHardwareBadObjectError:
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            jack_log("error code : kAudioHardwareBadObjectError");
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            break;
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        case kAudioHardwareUnsupportedOperationError:
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            jack_log("error code : kAudioHardwareUnsupportedOperationError");
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            break;
        default:
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            Print4CharCode("error code : unknown", err);
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            break;
    }
}

static OSStatus DisplayDeviceNames()
{
    UInt32 size;
    Boolean isWritable;
    int i, deviceNum;
    OSStatus err;
    CFStringRef UIname;

    err = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices, &size, &isWritable);
    if (err != noErr)
        return err;

    deviceNum = size / sizeof(AudioDeviceID);
    AudioDeviceID devices[deviceNum];

    err = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, &size, devices);
    if (err != noErr)
        return err;

    for (i = 0; i < deviceNum; i++) {
        char device_name[256];
        char internal_name[256];

        size = sizeof(CFStringRef);
        UIname = NULL;
        err = AudioDeviceGetProperty(devices[i], 0, false, kAudioDevicePropertyDeviceUID, &size, &UIname);
        if (err == noErr) {
            CFStringGetCString(UIname, internal_name, 256, CFStringGetSystemEncoding());
        } else {
            goto error;
        }

        size = 256;
        err = AudioDeviceGetProperty(devices[i], 0, false, kAudioDevicePropertyDeviceName, &size, device_name);
        if (err != noErr)
            return err;

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        jack_info("Device name = \'%s\', internal_name = \'%s\' (to be used as -C, -P, or -d parameter)", device_name, internal_name);
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    }

    return noErr;

error:
    if (UIname != NULL)
        CFRelease(UIname);
    return err;
}

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static CFStringRef GetDeviceName(AudioDeviceID id)
{
    UInt32 size = sizeof(CFStringRef);
    CFStringRef UIname;
    OSStatus err = AudioDeviceGetProperty(id, 0, false, kAudioDevicePropertyDeviceUID, &size, &UIname);
    return (err == noErr) ? UIname : NULL;
}

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OSStatus JackCoreAudioDriver::Render(void *inRefCon,
                                     AudioUnitRenderActionFlags *ioActionFlags,
                                     const AudioTimeStamp *inTimeStamp,
                                     UInt32 inBusNumber,
                                     UInt32 inNumberFrames,
                                     AudioBufferList *ioData)
{
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    JackCoreAudioDriver* driver = (JackCoreAudioDriver*)inRefCon;
    driver->fActionFags = ioActionFlags;
    driver->fCurrentTime = (AudioTimeStamp *)inTimeStamp;
    driver->fDriverOutputData = ioData;
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    driver->CycleTakeBeginTime();
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    return driver->Process();
}

int JackCoreAudioDriver::Read()
{
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    AudioUnitRender(fAUHAL, fActionFags, fCurrentTime, 1, fEngineControl->fBufferSize, fJackInputData);
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    return 0;
}

int JackCoreAudioDriver::Write()
{
    for (int i = 0; i < fPlaybackChannels; i++) {
        if (fGraphManager->GetConnectionsNum(fPlaybackPortList[i]) > 0) {
            float* buffer = GetOutputBuffer(i);
            int size = sizeof(float) * fEngineControl->fBufferSize;
            memcpy((float*)fDriverOutputData->mBuffers[i].mData, buffer, size);
            // Monitor ports
            if (fWithMonitorPorts && fGraphManager->GetConnectionsNum(fMonitorPortList[i]) > 0)
                memcpy(GetMonitorBuffer(i), buffer, size);
        } else {
            memset((float*)fDriverOutputData->mBuffers[i].mData, 0, sizeof(float) * fEngineControl->fBufferSize);
        }
    }
    return 0;
}

// Will run only once
OSStatus JackCoreAudioDriver::MeasureCallback(AudioDeviceID inDevice,
        const AudioTimeStamp* inNow,
        const AudioBufferList* inInputData,
        const AudioTimeStamp* inInputTime,
        AudioBufferList* outOutputData,
        const AudioTimeStamp* inOutputTime,
        void* inClientData)
{
    JackCoreAudioDriver* driver = (JackCoreAudioDriver*)inClientData;
    AudioDeviceStop(driver->fDeviceID, MeasureCallback);
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    jack_log("JackCoreAudioDriver::MeasureCallback called");
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    JackMachThread::GetParams(pthread_self(), &driver->fEngineControl->fPeriod, &driver->fEngineControl->fComputation, &driver->fEngineControl->fConstraint);
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    if (driver->fComputationGrain > 0) {
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        jack_log("JackCoreAudioDriver::MeasureCallback : RT thread computation setup to %d percent of period", int(driver->fComputationGrain * 100));
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        driver->fEngineControl->fComputation = driver->fEngineControl->fPeriod * driver->fComputationGrain;
    }
    
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    // Setup threadded based log function
    set_threaded_log_function();
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    return noErr;
}

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OSStatus JackCoreAudioDriver::SRNotificationCallback(AudioDeviceID inDevice,
        UInt32 inChannel,
        Boolean	isInput,
        AudioDevicePropertyID inPropertyID,
        void* inClientData)
{
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    JackCoreAudioDriver* driver = (JackCoreAudioDriver*)inClientData;

    switch (inPropertyID) {

        case kAudioDevicePropertyNominalSampleRate: {
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            jack_log("JackCoreAudioDriver::SRNotificationCallback kAudioDevicePropertyNominalSampleRate");
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            driver->fState = true;
            break;
        }
    }

    return noErr;
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}

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// A better implementation would possibly try to recover in case of hardware device change (see HALLAB HLFilePlayerWindowControllerAudioDevicePropertyListenerProc code)
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OSStatus JackCoreAudioDriver::DeviceNotificationCallback(AudioDeviceID inDevice,
        UInt32 inChannel,
        Boolean	isInput,
        AudioDevicePropertyID inPropertyID,
        void* inClientData)
{
    JackCoreAudioDriver* driver = (JackCoreAudioDriver*)inClientData;
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    switch (inPropertyID) {
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        case kAudioDeviceProcessorOverload: {
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            jack_error("JackCoreAudioDriver::DeviceNotificationCallback kAudioDeviceProcessorOverload");
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            jack_time_t cur_time = GetMicroSeconds();
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            driver->NotifyXRun(cur_time, float(cur_time - driver->fBeginDateUst));   // Better this value than nothing... 
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            break;
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        }
        
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        case kAudioDevicePropertyStreamConfiguration: {
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            jack_error("Cannot handle kAudioDevicePropertyStreamConfiguration : server will quit...");
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            driver->NotifyFailure(JackBackendError, "Another application has changed the device configuration.");   // Message length limited to JACK_MESSAGE_SIZE
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            driver->CloseAUHAL();
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            kill(JackTools::GetPID(), SIGINT);
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            return kAudioHardwareUnsupportedOperationError;
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        }
        
        case kAudioDevicePropertyNominalSampleRate: {
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            jack_error("Cannot handle kAudioDevicePropertyNominalSampleRate : server will quit...");
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            driver->NotifyFailure(JackBackendError, "Another application has changed the sample rate.");            // Message length limited to JACK_MESSAGE_SIZE
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            driver->CloseAUHAL();
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            kill(JackTools::GetPID(), SIGINT);
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            return kAudioHardwareUnsupportedOperationError;
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		}
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    }
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    return noErr;
}

OSStatus JackCoreAudioDriver::GetDeviceIDFromUID(const char* UID, AudioDeviceID* id)
{
    UInt32 size = sizeof(AudioValueTranslation);
    CFStringRef inIUD = CFStringCreateWithCString(NULL, UID, CFStringGetSystemEncoding());
    AudioValueTranslation value = { &inIUD, sizeof(CFStringRef), id, sizeof(AudioDeviceID) };

    if (inIUD == NULL) {
        return kAudioHardwareUnspecifiedError;
    } else {
        OSStatus res = AudioHardwareGetProperty(kAudioHardwarePropertyDeviceForUID, &size, &value);
        CFRelease(inIUD);
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        jack_log("GetDeviceIDFromUID %s %ld", UID, *id);
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        return (*id == kAudioDeviceUnknown) ? kAudioHardwareBadDeviceError : res;
    }
}

OSStatus JackCoreAudioDriver::GetDefaultDevice(AudioDeviceID* id)
{
    OSStatus res;
    UInt32 theSize = sizeof(UInt32);
    AudioDeviceID inDefault;
    AudioDeviceID outDefault;

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    if ((res = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultInputDevice, &theSize, &inDefault)) != noErr)
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        return res;

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    if ((res = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &theSize, &outDefault)) != noErr)
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        return res;

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    jack_log("GetDefaultDevice: input = %ld output = %ld", inDefault, outDefault);
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    // Get the device only if default input and output are the same
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    if (inDefault == outDefault) {
        *id = inDefault;
        return noErr;
    } else {
        jack_error("Default input and output devices are not the same !!");
        return kAudioHardwareBadDeviceError;
    }
}

OSStatus JackCoreAudioDriver::GetDefaultInputDevice(AudioDeviceID* id)
{
    OSStatus res;
    UInt32 theSize = sizeof(UInt32);
    AudioDeviceID inDefault;

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    if ((res = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultInputDevice, &theSize, &inDefault)) != noErr)
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        return res;

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    jack_log("GetDefaultInputDevice: input = %ld ", inDefault);
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    *id = inDefault;
    return noErr;
}

OSStatus JackCoreAudioDriver::GetDefaultOutputDevice(AudioDeviceID* id)
{
    OSStatus res;
    UInt32 theSize = sizeof(UInt32);
    AudioDeviceID outDefault;

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    if ((res = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &theSize, &outDefault)) != noErr)
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        return res;

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    jack_log("GetDefaultOutputDevice: output = %ld", outDefault);
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    *id = outDefault;
    return noErr;
}

OSStatus JackCoreAudioDriver::GetDeviceNameFromID(AudioDeviceID id, char* name)
{
    UInt32 size = 256;
    return AudioDeviceGetProperty(id, 0, false, kAudioDevicePropertyDeviceName, &size, name);
}

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OSStatus JackCoreAudioDriver::GetTotalChannels(AudioDeviceID device, int& channelCount, bool isInput)
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{
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    OSStatus err = noErr;
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    UInt32	outSize;
    Boolean	outWritable;
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    AudioBufferList* bufferList = 0;
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    channelCount = 0;
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    err = AudioDeviceGetPropertyInfo(device, 0, isInput, kAudioDevicePropertyStreamConfiguration, &outSize, &outWritable);
    if (err == noErr) {
        bufferList = (AudioBufferList*)malloc(outSize);
        err = AudioDeviceGetProperty(device, 0, isInput, kAudioDevicePropertyStreamConfiguration, &outSize, bufferList);
        if (err == noErr) {
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            for (unsigned int i = 0; i < bufferList->mNumberBuffers; i++)
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                channelCount += bufferList->mBuffers[i].mNumberChannels;
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        }
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        if (bufferList)
            free(bufferList);
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    }

    return err;
}

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JackCoreAudioDriver::JackCoreAudioDriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table)
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        : JackAudioDriver(name, alias, engine, table), 
        fJackInputData(NULL), 
        fDriverOutputData(NULL), 
        fPluginID(0), 
        fState(false), 
        fHogged(false),
        fIOUsage(1.f),
        fComputationGrain(-1.f)
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{}
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JackCoreAudioDriver::~JackCoreAudioDriver()
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{}
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OSStatus JackCoreAudioDriver::DestroyAggregateDevice() 
{
    OSStatus osErr = noErr;
    AudioObjectPropertyAddress pluginAOPA;
    pluginAOPA.mSelector = kAudioPlugInDestroyAggregateDevice;
    pluginAOPA.mScope = kAudioObjectPropertyScopeGlobal;
    pluginAOPA.mElement = kAudioObjectPropertyElementMaster;
    UInt32 outDataSize;
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    osErr = AudioObjectGetPropertyDataSize(fPluginID, &pluginAOPA, 0, NULL, &outDataSize);
    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::DestroyAggregateDevice : AudioObjectGetPropertyDataSize error");
        printError(osErr);
        return osErr;
    }
        
    osErr = AudioObjectGetPropertyData(fPluginID, &pluginAOPA, 0, NULL, &outDataSize, &fDeviceID);
    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::DestroyAggregateDevice : AudioObjectGetPropertyData error");
        printError(osErr);
        return osErr;
    }
    
    return noErr;
}

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OSStatus JackCoreAudioDriver::CreateAggregateDevice(AudioDeviceID captureDeviceID, AudioDeviceID playbackDeviceID, AudioDeviceID* outAggregateDevice) 
{
    OSStatus osErr = noErr;
    UInt32 outSize;
    Boolean outWritable;

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    //---------------------------------------------------------------------------
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    // Start to create a new aggregate by getting the base audio hardware plugin
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    //---------------------------------------------------------------------------
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    char capture_name[256];
    char playback_name[256];
    GetDeviceNameFromID(captureDeviceID, capture_name);
    GetDeviceNameFromID(playbackDeviceID, playback_name);
    jack_info("Separated input = '%s' and output = '%s' devices, create a private aggregate device to handle them...", capture_name, playback_name);
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    osErr = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyPlugInForBundleID, &outSize, &outWritable);
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioHardwareGetPropertyInfo kAudioHardwarePropertyPlugInForBundleID error");
        printError(osErr);
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        return osErr;
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    }
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    AudioValueTranslation pluginAVT;

    CFStringRef inBundleRef = CFSTR("com.apple.audio.CoreAudio");
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    pluginAVT.mInputData = &inBundleRef;
    pluginAVT.mInputDataSize = sizeof(inBundleRef);
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    pluginAVT.mOutputData = &fPluginID;
    pluginAVT.mOutputDataSize = sizeof(fPluginID);
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    osErr = AudioHardwareGetProperty(kAudioHardwarePropertyPlugInForBundleID, &outSize, &pluginAVT);
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioHardwareGetProperty kAudioHardwarePropertyPlugInForBundleID error");
        printError(osErr);
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        return osErr;
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    }
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    //-------------------------------------------------
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    // Create a CFDictionary for our aggregate device
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    //-------------------------------------------------
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    CFMutableDictionaryRef aggDeviceDict = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);

    CFStringRef AggregateDeviceNameRef = CFSTR("JackDuplex");
    CFStringRef AggregateDeviceUIDRef = CFSTR("com.grame.JackDuplex");
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    // add the name of the device to the dictionary
    CFDictionaryAddValue(aggDeviceDict, CFSTR(kAudioAggregateDeviceNameKey), AggregateDeviceNameRef);

    // add our choice of UID for the aggregate device to the dictionary
    CFDictionaryAddValue(aggDeviceDict, CFSTR(kAudioAggregateDeviceUIDKey), AggregateDeviceUIDRef);
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    // add a "private aggregate key" to the dictionary
    int value = 1;
    CFNumberRef AggregateDeviceNumberRef = CFNumberCreate(NULL, kCFNumberIntType, &value);
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    SInt32 system;
    Gestalt(gestaltSystemVersion, &system);
     
    jack_log("JackCoreAudioDriver::CreateAggregateDevice : system version = %x limit = %x", system, 0x00001054);
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    // Starting with 10.5.4 systems, the AD can be internal... (better)
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    if (system < 0x00001054) {
        jack_log("JackCoreAudioDriver::CreateAggregateDevice : public aggregate device....");
    } else {
        jack_log("JackCoreAudioDriver::CreateAggregateDevice : private aggregate device....");
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        CFDictionaryAddValue(aggDeviceDict, CFSTR(kAudioAggregateDeviceIsPrivateKey), AggregateDeviceNumberRef);
    }
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    //-------------------------------------------------
    // Create a CFMutableArray for our sub-device list
    //-------------------------------------------------
    
    CFStringRef captureDeviceUID = GetDeviceName(captureDeviceID);
    CFStringRef playbackDeviceUID = GetDeviceName(playbackDeviceID);
    
    if (captureDeviceUID == NULL || playbackDeviceUID == NULL)
        return -1;
  
    // we need to append the UID for each device to a CFMutableArray, so create one here
    CFMutableArrayRef subDevicesArray = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);

    // two sub-devices in this example, so append the sub-device's UID to the CFArray
    CFArrayAppendValue(subDevicesArray, captureDeviceUID);
    CFArrayAppendValue(subDevicesArray, playbackDeviceUID);

    //-----------------------------------------------------------------------
    // Feed the dictionary to the plugin, to create a blank aggregate device
    //-----------------------------------------------------------------------
 
    AudioObjectPropertyAddress pluginAOPA;
    pluginAOPA.mSelector = kAudioPlugInCreateAggregateDevice;
    pluginAOPA.mScope = kAudioObjectPropertyScopeGlobal;
    pluginAOPA.mElement = kAudioObjectPropertyElementMaster;
    UInt32 outDataSize;

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    osErr = AudioObjectGetPropertyDataSize(fPluginID, &pluginAOPA, 0, NULL, &outDataSize);
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioObjectGetPropertyDataSize error");
        printError(osErr);
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        return osErr;
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    }
    
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    osErr = AudioObjectGetPropertyData(fPluginID, &pluginAOPA, sizeof(aggDeviceDict), &aggDeviceDict, &outDataSize, outAggregateDevice);
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioObjectGetPropertyData error");
        printError(osErr);
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        return osErr;
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    }
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    // pause for a bit to make sure that everything completed correctly
    // this is to work around a bug in the HAL where a new aggregate device seems to disappear briefly after it is created
    CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, false);

    //-------------------------
    // Set the sub-device list
    //-------------------------

    pluginAOPA.mSelector = kAudioAggregateDevicePropertyFullSubDeviceList;
    pluginAOPA.mScope = kAudioObjectPropertyScopeGlobal;
    pluginAOPA.mElement = kAudioObjectPropertyElementMaster;
    outDataSize = sizeof(CFMutableArrayRef);
    osErr = AudioObjectSetPropertyData(*outAggregateDevice, &pluginAOPA, 0, NULL, outDataSize, &subDevicesArray);
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioObjectSetPropertyData for sub-device list error");
        printError(osErr);
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        return osErr;
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    }
    
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    // pause again to give the changes time to take effect
    CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, false);

    //-----------------------
    // Set the master device
    //-----------------------

    // set the master device manually (this is the device which will act as the master clock for the aggregate device)
    // pass in the UID of the device you want to use
    pluginAOPA.mSelector = kAudioAggregateDevicePropertyMasterSubDevice;
    pluginAOPA.mScope = kAudioObjectPropertyScopeGlobal;
    pluginAOPA.mElement = kAudioObjectPropertyElementMaster;
    outDataSize = sizeof(CFStringRef);
    osErr = AudioObjectSetPropertyData(*outAggregateDevice, &pluginAOPA, 0, NULL, outDataSize, &captureDeviceUID);  // capture is master...
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    if (osErr != noErr) {
        jack_error("JackCoreAudioDriver::CreateAggregateDevice : AudioObjectSetPropertyData for master device error");
        printError(osErr);
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        return osErr;
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    }
    
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    // pause again to give the changes time to take effect
    CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, false);

    //----------
    // Clean up
    //----------
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    // release the private AD key
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    CFRelease(AggregateDeviceNumberRef);
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    // release the CF objects we have created - we don't need them any more
    CFRelease(aggDeviceDict);
    CFRelease(subDevicesArray);

    // release the device UID
    CFRelease(captureDeviceUID);
    CFRelease(playbackDeviceUID);
    
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    jack_log("New aggregate device %ld", *outAggregateDevice);
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    return noErr;
}

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int JackCoreAudioDriver::SetupDevices(const char* capture_driver_uid, const char* playback_driver_uid, char* capture_driver_name, char* playback_driver_name)
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{
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    capture_driver_name[0] = 0;
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    playback_driver_name[0] = 0;
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    // Duplex
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    if (strcmp(capture_driver_uid, "") != 0 && strcmp(playback_driver_uid, "") != 0) {
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        jack_log("JackCoreAudioDriver::Open duplex");
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        // Same device for capture and playback...
        if (strcmp(capture_driver_uid, playback_driver_uid) == 0)  {
            
            if (GetDeviceIDFromUID(playback_driver_uid, &fDeviceID) != noErr) {
                jack_log("Will take default in/out");
                if (GetDefaultDevice(&fDeviceID) != noErr) {
                    jack_error("Cannot open default device");
                    return -1;
                }
            }
            if (GetDeviceNameFromID(fDeviceID, capture_driver_name) != noErr || GetDeviceNameFromID(fDeviceID, playback_driver_name) != noErr) {
                jack_error("Cannot get device name from device ID");
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                return -1;
            }
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        } else {
        
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            // Creates aggregate device
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            AudioDeviceID captureID, playbackID;
            if (GetDeviceIDFromUID(capture_driver_uid, &captureID) != noErr)
                return -1;
            if (GetDeviceIDFromUID(playback_driver_uid, &playbackID) != noErr) 
                return -1;
            if (CreateAggregateDevice(captureID, playbackID, &fDeviceID) != noErr)
                return -1;
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        }

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    // Capture only
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    } else if (strcmp(capture_driver_uid, "") != 0) {
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        jack_log("JackCoreAudioDriver::Open capture only");
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        if (GetDeviceIDFromUID(capture_driver_uid, &fDeviceID) != noErr) {
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            jack_log("Will take default input");
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            if (GetDefaultInputDevice(&fDeviceID) != noErr) {
                jack_error("Cannot open default device");
                return -1;
            }
        }
        if (GetDeviceNameFromID(fDeviceID, capture_driver_name) != noErr) {
            jack_error("Cannot get device name from device ID");
            return -1;
        }

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    // Playback only
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    } else if (strcmp(playback_driver_uid, "") != 0) {
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        jack_log("JackCoreAudioDriver::Open playback only");
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        if (GetDeviceIDFromUID(playback_driver_uid, &fDeviceID) != noErr) {
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            jack_log("Will take default output");
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            if (GetDefaultOutputDevice(&fDeviceID) != noErr) {
                jack_error("Cannot open default device");
                return -1;
            }
        }
        if (GetDeviceNameFromID(fDeviceID, playback_driver_name) != noErr) {
            jack_error("Cannot get device name from device ID");
            return -1;
        }

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    // Use default driver in duplex mode
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    } else {
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        jack_log("JackCoreAudioDriver::Open default driver");
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        if (GetDefaultDevice(&fDeviceID) != noErr) {
            jack_error("Cannot open default device");
            return -1;
        }
        if (GetDeviceNameFromID(fDeviceID, capture_driver_name) != noErr || GetDeviceNameFromID(fDeviceID, playback_driver_name) != noErr) {
            jack_error("Cannot get device name from device ID");
            return -1;
        }
    }
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    if (fHogged) {
        if (TakeHog()) {
            jack_info("Device = %ld has been hogged", fDeviceID);
        } else {
            jack_error("Cannot hog device = %ld", fDeviceID);
        }
    }
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    return 0;
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}
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/*
Return the max possible input channels in in_nChannels and output channels in out_nChannels.
*/
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int JackCoreAudioDriver::SetupChannels(bool capturing, bool playing, int& inchannels, int& outchannels, int& in_nChannels, int& out_nChannels, bool strict)
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{
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    OSStatus err = noErr;

    if (capturing) {
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        err = GetTotalChannels(fDeviceID, in_nChannels, true);
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        if (err != noErr) {
            jack_error("Cannot get input channel number");
            printError(err);
            return -1;
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        } else {
            jack_log("Max input channels : %d", in_nChannels);
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        }
    }

    if (playing) {
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        err = GetTotalChannels(fDeviceID, out_nChannels, false);
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        if (err != noErr) {
            jack_error("Cannot get output channel number");
            printError(err);
            return -1;
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        } else {
            jack_log("Max output channels : %d", out_nChannels);
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        }
    }

    if (inchannels > in_nChannels) {
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        jack_error("This device hasn't required input channels inchannels = %d in_nChannels = %d", inchannels, in_nChannels);
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        if (strict)
            return -1;
    }
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    if (outchannels > out_nChannels) {
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        jack_error("This device hasn't required output channels outchannels = %d out_nChannels = %d", outchannels, out_nChannels);
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        if (strict)
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            return -1;
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    }

    if (inchannels == 0) {
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        jack_log("Setup max in channels = %d", in_nChannels);
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        inchannels = in_nChannels;
    }

    if (outchannels == 0) {
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        jack_log("Setup max out channels = %d", out_nChannels);
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        outchannels = out_nChannels;
    }
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    return 0;
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}
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int JackCoreAudioDriver::SetupBufferSizeAndSampleRate(jack_nframes_t buffer_size, jack_nframes_t samplerate)
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{
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    OSStatus err = noErr;
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    UInt32 outSize;
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    Float64 sampleRate;

    // Setting buffer size
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    outSize = sizeof(UInt32);
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    err = AudioDeviceSetProperty(fDeviceID, NULL, 0, false, kAudioDevicePropertyBufferFrameSize, outSize, &buffer_size);
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    if (err != noErr) {
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        jack_error("Cannot set buffer size %ld", buffer_size);
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        printError(err);
        return -1;
    }

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    // Get sample rate
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    outSize =  sizeof(Float64);
    err = AudioDeviceGetProperty(fDeviceID, 0, kAudioDeviceSectionGlobal, kAudioDevicePropertyNominalSampleRate, &outSize, &sampleRate);
    if (err != noErr) {
        jack_error("Cannot get current sample rate");
        printError(err);
        return -1;
    }

    // If needed, set new sample rate
    if (samplerate != (jack_nframes_t)sampleRate) {
        sampleRate = (Float64)samplerate;

        // To get SR change notification
        err = AudioDeviceAddPropertyListener(fDeviceID, 0, true, kAudioDevicePropertyNominalSampleRate, SRNotificationCallback, this);
        if (err != noErr) {
            jack_error("Error calling AudioDeviceAddPropertyListener with kAudioDevicePropertyNominalSampleRate");
            printError(err);
            return -1;
        }
        err = AudioDeviceSetProperty(fDeviceID, NULL, 0, kAudioDeviceSectionGlobal, kAudioDevicePropertyNominalSampleRate, outSize, &sampleRate);
        if (err != noErr) {
            jack_error("Cannot set sample rate = %ld", samplerate);
            printError(err);
            return -1;
        }

        // Waiting for SR change notification
        int count = 0;
        while (!fState && count++ < 100) {
            usleep(100000);
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            jack_log("Wait count = %d", count);
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        }

        // Remove SR change notification
        AudioDeviceRemovePropertyListener(fDeviceID, 0, true, kAudioDevicePropertyNominalSampleRate, SRNotificationCallback);
    }

    return 0;
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}
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int JackCoreAudioDriver::OpenAUHAL(bool capturing,
                                   bool playing,
                                   int inchannels,
                                   int outchannels,
                                   int in_nChannels,
                                   int out_nChannels,
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                                   jack_nframes_t buffer_size,
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                                   jack_nframes_t samplerate,
                                   bool strict)
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{
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    ComponentResult err1;
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    UInt32 enableIO;
    AudioStreamBasicDescription srcFormat, dstFormat;
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    jack_log("OpenAUHAL capturing = %d playing = %d inchannels = %d outchannels = %d in_nChannels = %d out_nChannels = %d", capturing, playing, inchannels, outchannels, in_nChannels, out_nChannels);
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    if (inchannels == 0 && outchannels == 0) {
        jack_error("No input and output channels...");
        return -1;
    }
         
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    // AUHAL
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    ComponentDescription cd = {kAudioUnitType_Output, kAudioUnitSubType_HALOutput, kAudioUnitManufacturer_Apple, 0, 0};
    Component HALOutput = FindNextComponent(NULL, &cd);

    err1 = OpenAComponent(HALOutput, &fAUHAL);
    if (err1 != noErr) {
        jack_error("Error calling OpenAComponent");
        printError(err1);
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        return -1;
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    }

    err1 = AudioUnitInitialize(fAUHAL);
    if (err1 != noErr) {
        jack_error("Cannot initialize AUHAL unit");
        printError(err1);
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        return -1;
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    }

    // Start I/O
    if (capturing && inchannels > 0) {
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        enableIO = 1;
        jack_log("Setup AUHAL input on");
    } else {
        enableIO = 0;
        jack_log("Setup AUHAL input off");
    }
    
    err1 = AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &enableIO, sizeof(enableIO));
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitSetProperty - kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input");
        printError(err1);
        if (strict)
            return -1;
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    }

    if (playing && outchannels > 0) {
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        enableIO = 1;
        jack_log("Setup AUHAL output on");
    } else {
        enableIO = 0;
        jack_log("Setup AUHAL output off");
    }
    
    err1 = AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, 0, &enableIO, sizeof(enableIO));
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitSetProperty - kAudioOutputUnitProperty_EnableIO,kAudioUnitScope_Output");
        printError(err1);
        if (strict)
            return -1;
    }
    
    AudioDeviceID currAudioDeviceID;
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    UInt32 size = sizeof(AudioDeviceID);
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    err1 = AudioUnitGetProperty(fAUHAL, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &currAudioDeviceID, &size);
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitGetProperty - kAudioOutputUnitProperty_CurrentDevice");
        printError(err1);
        if (strict)
            return -1;
    } else {
        jack_log("AudioUnitGetPropertyCurrentDevice = %d", currAudioDeviceID);
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    }

    // Setup up choosen device, in both input and output cases
    err1 = AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &fDeviceID, sizeof(AudioDeviceID));
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitSetProperty - kAudioOutputUnitProperty_CurrentDevice");
        printError(err1);
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        if (strict)
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            return -1;
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    }
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    // Set buffer size
    if (capturing && inchannels > 0) {
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        err1 = AudioUnitSetProperty(fAUHAL, kAudioUnitProperty_MaximumFramesPerSlice, kAudioUnitScope_Global, 1, (UInt32*)&buffer_size, sizeof(UInt32));
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        if (err1 != noErr) {
            jack_error("Error calling AudioUnitSetProperty - kAudioUnitProperty_MaximumFramesPerSlice");
            printError(err1);
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            if (strict)
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                return -1;
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        }
    }

    if (playing && outchannels > 0) {
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        err1 = AudioUnitSetProperty(fAUHAL, kAudioUnitProperty_MaximumFramesPerSlice, kAudioUnitScope_Global, 0, (UInt32*)&buffer_size, sizeof(UInt32));
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        if (err1 != noErr) {
            jack_error("Error calling AudioUnitSetProperty - kAudioUnitProperty_MaximumFramesPerSlice");
            printError(err1);
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            if (strict)
                return -1;
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        }
    }

    // Setup channel map
    if (capturing && inchannels > 0 && inchannels < in_nChannels) {
        SInt32 chanArr[in_nChannels];
        for (int i = 0; i < in_nChannels; i++) {
            chanArr[i] = -1;
        }
        for (int i = 0; i < inchannels; i++) {
            chanArr[i] = i;
        }
        AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_ChannelMap , kAudioUnitScope_Input, 1, chanArr, sizeof(SInt32) * in_nChannels);
        if (err1 != noErr) {
            jack_error("Error calling AudioUnitSetProperty - kAudioOutputUnitProperty_ChannelMap 1");
            printError(err1);
        }
    }

    if (playing && outchannels > 0 && outchannels < out_nChannels) {
        SInt32 chanArr[out_nChannels];
        for (int i = 0;	i < out_nChannels; i++) {
            chanArr[i] = -1;
        }
        for (int i = 0; i < outchannels; i++) {
            chanArr[i] = i;
        }
        err1 = AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_ChannelMap, kAudioUnitScope_Output, 0, chanArr, sizeof(SInt32) * out_nChannels);
        if (err1 != noErr) {
            jack_error("Error calling AudioUnitSetProperty - kAudioOutputUnitProperty_ChannelMap 0");
            printError(err1);
        }
    }

    // Setup stream converters
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    jack_log("Setup AUHAL input stream converter SR = %ld", samplerate);
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    srcFormat.mSampleRate = samplerate;
    srcFormat.mFormatID = kAudioFormatLinearPCM;
    srcFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved;
    srcFormat.mBytesPerPacket = sizeof(float);
    srcFormat.mFramesPerPacket = 1;
    srcFormat.mBytesPerFrame = sizeof(float);
    srcFormat.mChannelsPerFrame = outchannels;
    srcFormat.mBitsPerChannel = 32;

    err1 = AudioUnitSetProperty(fAUHAL, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &srcFormat, sizeof(AudioStreamBasicDescription));
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitSetProperty - kAudioUnitProperty_StreamFormat kAudioUnitScope_Input");
        printError(err1);
    }

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    jack_log("Setup AUHAL output stream converter SR = %ld", samplerate);
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    dstFormat.mSampleRate = samplerate;
    dstFormat.mFormatID = kAudioFormatLinearPCM;
    dstFormat.mFormatFlags = kAudioFormatFlagsNativeFloatPacked | kLinearPCMFormatFlagIsNonInterleaved;
    dstFormat.mBytesPerPacket = sizeof(float);
    dstFormat.mFramesPerPacket = 1;
    dstFormat.mBytesPerFrame = sizeof(float);
    dstFormat.mChannelsPerFrame = inchannels;
    dstFormat.mBitsPerChannel = 32;

    err1 = AudioUnitSetProperty(fAUHAL, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &dstFormat, sizeof(AudioStreamBasicDescription));
    if (err1 != noErr) {
        jack_error("Error calling AudioUnitSetProperty - kAudioUnitProperty_StreamFormat kAudioUnitScope_Output");
        printError(err1);
    }

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    // Setup callbacks
    if (inchannels > 0 && outchannels == 0) {
        AURenderCallbackStruct output;
        output.inputProc = Render;
        output.inputProcRefCon = this;
        err1 = AudioUnitSetProperty(fAUHAL, kAudioOutputUnitProperty_SetInputCallback, kAudioUnitScope_Global, 0, &output, sizeof(output));
        if (err1 != noErr) {
            jack_error("Error calling  AudioUnitSetProperty - kAudioUnitProperty_SetRenderCallback 1");
            printError(err1);
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            return -1;
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        }
    } else {
        AURenderCallbackStruct output;
        output.inputProc = Render;
        output.inputProcRefCon = this;
        err1 = AudioUnitSetProperty(fAUHAL, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &output, sizeof(output));
        if (err1 != noErr) {
            jack_error("Error calling AudioUnitSetProperty - kAudioUnitProperty_SetRenderCallback 0");
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