/*

File:main.cpp

Abstract: simple audio-in recorder

Version: 1.0

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*/ 

#include <Carbon/Carbon.h>

#include <sys/param.h>

#include "DCAudioFileRecorder.h"

static OSStatus         WindowEventHandler( EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon );

static IBNibRef         sNibRef;

static HIViewRef        gFileLocationView, gRecordButtonView;

static Boolean          gIsRecording = false;

DCAudioFileRecorder     *gAudioFileRecorder = NULL;

FSRef                   gParentDir;

CFStringRef             gFileName= NULL;

const HIViewID  kFileLocationID = { 'fLoc', 128 };

const HIViewID  kRecordButtonID = { 'aRec', 129 };

AudioStreamBasicDescription gAACFormat = {44100.0, kAudioFormatMPEG4AAC, 0, 0, 1024, 0, 2, 0, 0};

CFStringRef NavSaveFile(FSRef *fileRef)

{

    NavDialogCreationOptions dlgOpts;

    NavDialogRef rDialog;

    OSStatus err = noErr;

    NavReplyRecord outReply;

    CFStringRef outName = NULL;

    err = NavGetDefaultDialogCreationOptions(&dlgOpts);

    if (err != noErr)

    {

        fprintf(stderr, "NavGetDefaultDialogCreationOptions failed, err %d!\n", err);

        return NULL;

    }

    dlgOpts.clientName = CFSTR("RecordAudioToFile");

    dlgOpts.windowTitle = CFSTR("Select File Location");

    dlgOpts.saveFileName = CFSTR("Audio Recording.m4a");

    dlgOpts.optionFlags |= kNavDefaultNavDlogOptions;

    err = NavCreatePutFileDialog(&dlgOpts, '????', '????', NULL, NULL, &rDialog);

    if (err != noErr)

    {

        fprintf(stderr, "NavCreatePutFileDialog failed, err %d!\n", err);

        return NULL;

    }

    err = NavDialogRun(rDialog);

    if(err != noErr)

    {

        NavDialogDispose(rDialog);

        fprintf(stderr, "NavDialogRun failed, err %d!\n", err);

        return NULL;

    }

    if(NavDialogGetUserAction(rDialog) == kNavUserActionCancel || kNavUserActionNone)

    {

        NavDialogDispose(rDialog);

        return NULL;

    }

    if (noErr != (err = NavDialogGetReply(rDialog, &outReply)))

    {

        NavDialogDispose(rDialog);

        fprintf(stderr, "NavDialogGetReply failed, err %d!\n", err);

        return NULL;

    }

    NavDialogDispose(rDialog);

    AEKeyword theAEKeyword;

    DescType typeCode;

    Size actualSize = 0;

    err = AEGetNthPtr (&(outReply.selection), 1, typeFSRef, &theAEKeyword, &typeCode, fileRef, sizeof(FSRef), &actualSize);

    if (err != noErr)

    {

        NavDisposeReply(&outReply);

        fprintf(stderr, "doOpenFileDlg() - AEGetNthPtr() failed, returning %lu!\n", (unsigned long) err);

        return NULL;

    }

    outName = CFStringCreateCopy(NULL, outReply.saveFileName);

    NavDisposeReply(&outReply);

    return outName;

}

OSStatus SelectFileLocation()

{

    OSStatus            err;

    if(gFileName)

        CFRelease(gFileName);

    // let user select file location

    gFileName = NavSaveFile(&gParentDir);

    if(gFileName == NULL)

        return -1;

    // create path to file and stick it in location text box

    CFURLRef dirurl = CFURLCreateFromFSRef(NULL, &gParentDir);

    if (dirurl == NULL)

    {

        fprintf(stderr, "CFURLCreateFromFSRef failed\n");

        return -1;

    }

    CFURLRef fullurl = CFURLCreateCopyAppendingPathComponent(NULL, dirurl, gFileName, false);

    if (fullurl == NULL)

    {

        CFRelease(dirurl);

        fprintf(stderr, "CFURLCreateCopyAppendingPathComponent failed\n");

        return -1;

    }

    CFStringRef fullpath = CFURLCopyFileSystemPath(fullurl, kCFURLPOSIXPathStyle);

    if (fullpath == NULL)

    {

        CFRelease(dirurl);

        CFRelease(fullurl);

        fprintf(stderr, "CFURLCopyFileSystemPath failed\n");

        return -1;

    }

    err = SetControlData(gFileLocationView, kControlEntireControl, kControlEditTextCFStringTag, sizeof(CFStringRef), &fullpath);

    CFRelease(dirurl);

    CFRelease(fullurl);

    CFRelease(fullpath);

    return err;

}

OSStatus StartRecording()

{

    OSStatus err = noErr;

    if(gIsRecording)

        return noErr;

    if(gAudioFileRecorder)

        delete gAudioFileRecorder; gAudioFileRecorder = NULL;

    gAudioFileRecorder = new DCAudioFileRecorder;

    err = gAudioFileRecorder->Configure(gParentDir, gFileName, &gAACFormat);

    if(err != noErr)

    {

        delete gAudioFileRecorder; gAudioFileRecorder = NULL;

        return err;

    }

    err = gAudioFileRecorder->Start();

    if(err != noErr)

    {

        delete gAudioFileRecorder; gAudioFileRecorder = NULL;

        return err;

    }

    err = SetControlTitleWithCFString(gRecordButtonView, CFSTR("Stop"));

    gIsRecording = true;

    return err;

}

OSStatus StopRecording()

{

    OSStatus err = noErr;

    if(!gIsRecording)

        return noErr;

    err = gAudioFileRecorder->Stop();

    err = SetControlTitleWithCFString(gRecordButtonView, CFSTR("Record"));

    // delete the object here so the async file I/O flushs

    delete gAudioFileRecorder; gAudioFileRecorder = NULL;

    gIsRecording = false;

    return err;

}

//--------------------------------------------------------------------------------------------

DEFINE_ONE_SHOT_HANDLER_GETTER( WindowEventHandler )

int main(int argc, char* argv[])

{

    OSStatus                    err;

    WindowRef                    window;

    static const EventTypeSpec    kWindowEvents[] =

    {

        { kEventClassCommand, kEventCommandProcess }

    };

    // Create a Nib reference, passing the name of the nib file (without the .nib extension).

    // CreateNibReference only searches into the application bundle.

    err = CreateNibReference( CFSTR("main"), &sNibRef );

    require_noerr( err, CantGetNibRef );

    // Once the nib reference is created, set the menu bar. "MainMenu" is the name of the menu bar

    // object. This name is set in InterfaceBuilder when the nib is created.

    err = SetMenuBarFromNib( sNibRef, CFSTR("MenuBar") );

    require_noerr( err, CantSetMenuBar );

    // Create a window. "MainWindow" is the name of the window object. This name is set in 

    // InterfaceBuilder when the nib is created.

    err = CreateWindowFromNib( sNibRef, CFSTR("MainWindow"), &window );

    require_noerr( err, CantCreateWindow );

    // Install a command handler on the window. We don't use this handler yet, but nearly all

    // Carbon apps will need to handle commands, so this saves everyone a little typing.

    InstallWindowEventHandler( window, GetWindowEventHandlerUPP(),

                               GetEventTypeCount( kWindowEvents ), kWindowEvents,

                               window, NULL );

    // Position new windows in a staggered arrangement on the main screen

    RepositionWindow( window, NULL, kWindowCascadeOnMainScreen );

    err = HIViewFindByID( HIViewGetRoot(window), kFileLocationID, &gFileLocationView );

    require_noerr( err, CantGetLocationView );

    err = HIViewFindByID( HIViewGetRoot(window), kRecordButtonID, &gRecordButtonView );

    require_noerr( err, CantGetRecordButtonView );

    // The window was created hidden, so show it

    ShowWindow( window );

    // Run the event loop

    RunApplicationEventLoop();

CantSetMenuBar:

CantGetNibRef:

CantCreateWindow:

CantGetLocationView:

CantGetProgressView:

CantGetRecordButtonView:

    return err;

}

//--------------------------------------------------------------------------------------------

static OSStatus

WindowEventHandler( EventHandlerCallRef inCaller, EventRef inEvent, void* inRefcon )

{

    OSStatus    err = eventNotHandledErr;

    switch ( GetEventClass( inEvent ) )

    {

        case kEventClassCommand:

        {

            HICommandExtended cmd;

            verify_noerr( GetEventParameter( inEvent, kEventParamDirectObject, typeHICommand, NULL, sizeof( cmd ), NULL, &cmd ) );

            switch ( GetEventKind( inEvent ) )

            {

                case kEventCommandProcess:

                    switch ( cmd.commandID )

                    {

                        case 'fBro':

                            if(SelectFileLocation() == noErr)

                                HIViewSetEnabled(gRecordButtonView, true);

                        break;

                        case 'fRec':

                            if(gIsRecording)

                                StopRecording();

                            else

                                StartRecording();

                        break;

                        default:

                            break;

                    }

                    break;

            }

            break;

        }

        default:

            break;

    }

    return err;

}