/*  Copyright:  © Copyright 2005 Apple Computer, Inc. All rights reserved.

    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.

            ("Apple") in consideration of your agreement to the following terms, and your

            use, installation, modification or redistribution of this Apple software

            constitutes acceptance of these terms.  If you do not agree with these terms,

            please do not use, install, modify or redistribute this Apple software.

            In consideration of your agreement to abide by the following terms, and subject

            to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs

            copyrights in this original Apple software (the "Apple Software"), to use,

            reproduce, modify and redistribute the Apple Software, with or without

            modifications, in source and/or binary forms; provided that if you redistribute

            the Apple Software in its entirety and without modifications, you must retain

            this notice and the following text and disclaimers in all such redistributions of

            the Apple Software.  Neither the name, trademarks, service marks or logos of

            Apple Computer, Inc. may be used to endorse or promote products derived from the

            Apple Software without specific prior written permission from Apple.  Except as

            expressly stated in this notice, no other rights or licenses, express or implied,

            are granted by Apple herein, including but not limited to any patent rights that

            may be infringed by your derivative works or by other works in which the Apple

            Software may be incorporated.

            The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO

            WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED

            WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR

            PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN

            COMBINATION WITH YOUR PRODUCTS.

            IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR

            CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE

            GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

            ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION

            OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT

            (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN

            ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#import "SeqGrab.h"

#import "WhackedDebugMacros.h"

#import "SGChan.h"

#import "SGVideo.h"

#import "SGAudio.h"

#import <sys/stat.h>

NSString * SeqGrabChannelRemovedNotification = @"SeqGrabChannelRemovedNotification";

NSString * SeqGrabChannelAddedNotification   = @"SeqGrabChannelAddedNotification";

NSString * SeqGrabChannelKey                 = @"SeqGrabChannelKey";

@implementation SeqGrab

/*________________________________________________________________________________________

*/

+ (void)initialize

{

    // initialize the QT toolbox

    EnterMovies();

}

/*________________________________________________________________________________________

*/

- (id)init

{

    OSStatus err = noErr;

    self = [super init];

    BAILSETERR( OpenADefaultComponent(SeqGrabComponentType, 0, &mSeqGrab) );

    BAILSETERR( SGInitialize(mSeqGrab) );

    mChans = [[NSMutableArray alloc] init];

    mSavedChannelUsages = [[NSMutableArray alloc] init];

bail:

    if (err)

    {

        [self release];

        return nil;

    }

    return self;

}

/*________________________________________________________________________________________

*/

- (void)dealloc

{

    //NSLog(@"[SeqGrab dealloc] %p", self);

    [mChans release];

    CloseComponent(mSeqGrab);

    [mCapturePath release];

    [mSavedCapturePath release];

    [mSavedChannelUsages release];

    [super dealloc];

}

/*________________________________________________________________________________________

*/

- (NSArray *)channels

{

    return mChans;

}

/*________________________________________________________________________________________

*/

- (SeqGrabComponent)seqGrabComponent

{

    return mSeqGrab;

}

/*________________________________________________________________________________________

*/

- (OSStatus)addChannel:(SGChan*)chan

{

    if (![mChans containsObject:chan])

        [mChans addObject:chan];

    return noErr;

}

/*________________________________________________________________________________________

*/

- (OSStatus)removeChannel:(SGChan*)chan

{

    [mChans removeObject:chan];

    return noErr;

}

/*________________________________________________________________________________________

*/

- (OSStatus)setCapturePath:(NSString*)filePath flags:(long)flags

{

    OSStatus err = noErr;

    Handle dataRef = NULL;

    OSType dataRefType = 0;

    if (filePath)

    {

        BAILSETERR( QTNewDataReferenceFromFullPathCFString( 

                        (CFStringRef)filePath, 

                        (UInt32)kQTNativeDefaultPathStyle, 

                        0, &dataRef, &dataRefType) );

    }

    [mCapturePath release];

    mCapturePath = [filePath retain];

    mCaptureFlags = flags;

    if ( !(flags & seqGrabDontMakeMovie) )

    {

        if ( (flags & seqGrabDontPreAllocateFileSize) &&

            !(flags & seqGrabAppendToFile) )

        {

            // Sequence Grabber will still preallocate the file on disk unless

            // seqGrabAppendToFile is also set.  So if you wish to keep

            // Sequence Grabber from preallocating a large file on disk, but

            // you don't want to append to an existing file, you need to open

            // up the desired file and truncate it first, then set the 

            // seqGrabAppendToFile flag.

            struct stat aStat = {0};

            stat([filePath cString], &aStat);

            if (aStat.st_size > 0)

            {

                remove([filePath cString]);

            }

            flags |= seqGrabAppendToFile;

        }

    }

    err = SGSetDataRef(mSeqGrab, dataRef, dataRefType, flags);

bail:

    DisposeHandle(dataRef);

    return err;

}

/*________________________________________________________________________________________

*/

- (OSStatus)setSettings:(NSData*)blob

{

    OSStatus    err = noErr;

    UserData    ud = NULL;

    Handle      hud = NULL;

    short       idx;

    SGChannel   c;

    OSType      type;

    UserData    savedUD = NULL;

    BAILSETERR( SGGetSettings(mSeqGrab, &savedUD, 0) );

    hud = NewHandle([blob length]);

    memcpy(*hud, [blob bytes], [blob length]);

    BAILSETERR( NewUserDataFromHandle(hud, &ud) );

    // before setting settings, remove all channel objects,

    // since the settings will have new channel objects.

    while ([mChans count])

    {

        SGChan * chan = [[mChans lastObject] retain];

        [mChans removeLastObject];

        [[NSNotificationCenter defaultCenter] 

            postNotificationName:SeqGrabChannelRemovedNotification object:self

            userInfo:[NSDictionary dictionaryWithObject:chan forKey:SeqGrabChannelKey]];

        [chan release];

    }

    BAILSETERR( SGSetSettings(mSeqGrab, ud, 0) );

    // iterate through all the channels and set their refcons to 0 (clearing out any

    // SGChan * object associations they may have had from previous runs)

    idx = 0;

    while (noErr == SGGetIndChannel(mSeqGrab, ++idx, &c, &type) )

    {

        SGSetChannelRefCon(c, 0);

    }

    // now iterate through mSeqGrab's channel components and make

    // SGChan wrappers for each.  Our implementation uses the SGChannel 

    // RefCon as a pointer to SGChan * object pointer, so if the channel

    //  refcon is non NULL, we don't need to make a wrapper for it

startOver:

    idx = 0;

    while ( noErr == SGGetIndChannel(mSeqGrab, ++idx, &c, &type) )

    {

        long refCon;

        SGGetChannelRefCon(c, &refCon);

        switch (type)

        {

            case VideoMediaType:

                if (refCon == 0)

                {

                    SGVideo * vide = 

                        [[SGVideo alloc] initWithSeqGrab:self channelComponent:c];

                    [self addChannel:vide];

                    [[NSNotificationCenter defaultCenter] 

                        postNotificationName:SeqGrabChannelAddedNotification object:self

                        userInfo:

                            [NSDictionary dictionaryWithObject:vide 

                            forKey:SeqGrabChannelKey]];

                    [vide release];

                }

                break;

            case SGAudioMediaType:

                if (refCon == 0)

                {

                    SGAudio * audi = 

                        [[SGAudio alloc] initWithSeqGrab:self channelComponent:c];

                    [self addChannel:audi];

                    [[NSNotificationCenter defaultCenter] 

                        postNotificationName:SeqGrabChannelAddedNotification object:self

                        userInfo:

                            [NSDictionary dictionaryWithObject:audi forKey:SeqGrabChannelKey]];

                    [audi release];

                }

                break;

            case SoundMediaType:

            {

                // replace the 'soun' channel with an 'audi' channel.

                UserData sounSettings;

                SGChannel newChan;

                SGGetChannelSettings(mSeqGrab, c, &sounSettings, 0);

                SGDisposeChannel(mSeqGrab, c);

                SGNewChannel(mSeqGrab, SGAudioMediaType, &newChan);

                SGSetChannelSettings(mSeqGrab, newChan, sounSettings, 0);

                goto startOver;

            }

                break;

            default:

                NSLog(@"[SeqGrab setSettings:] encountered an "

                        "unrecognized chan type - \"%.4s\"", (char*)&type);

        }

    }

bail:

    if (err)

    {

        SGSetSettings(mSeqGrab, savedUD, 0);

    }

    DisposeUserData(savedUD);

    DisposeHandle(hud);

    DisposeUserData(ud);

    return err;

}

/*________________________________________________________________________________________

*/

- (NSData *)settings

{

    OSStatus    err = noErr;

    UserData    ud = NULL;

    Handle      hud = NewHandle(0);

    NSData *    data = nil;

    BAILSETERR( SGGetSettings(mSeqGrab, &ud, 0) );

    BAILSETERR( PutUserDataIntoHandle(ud, hud) );

    data = [NSData dataWithBytes:*hud length:GetHandleSize(hud)];

bail:

    DisposeUserData(ud);

    DisposeHandle(hud);

    return data;

}

/*________________________________________________________________________________________

*/

- (void)setIdleFrequency:(UInt32)idlesPerSecond

{

    mIdlesPerSecond = idlesPerSecond;

}

/*________________________________________________________________________________________

*/

- (UInt32)idleFrequency

{

    return mIdlesPerSecond;

}

/*________________________________________________________________________________________

*/

- (OSStatus)setMaxRecordTime:(float)seconds

{

    return (SGSetMaximumRecordTime(mSeqGrab, (UInt32)((seconds * 60) + .5)) );

}

/*________________________________________________________________________________________

*/

- (void)idleTimer:(NSTimer*)timer

{

    OSStatus err = noErr;

    if (mStopRequested == YES)

    {

        [timer invalidate];

        [timer release];

    }

    else {

        err = SGIdle(mSeqGrab);

        if (err)

            [self stop];

    }

}

/*________________________________________________________________________________________

*/

- (void)startTimer

{                    

    UInt32 idlesPerSecond = mIdlesPerSecond;

    const UInt32 kDefaultAudioIdlesPerSecond = 10;

    const UInt32 kDefaultVideoIdlesPerSecond = 30;

        // don't forget to set a default idle frequency if none has been

        // specified by the app

    if (idlesPerSecond == 0)

    {

        idlesPerSecond = kDefaultAudioIdlesPerSecond;

        for (int i = 0; i < [mChans count]; i++)

        {

            if ( [[mChans objectAtIndex:i] isVideoChannel] )

            {

                idlesPerSecond = kDefaultVideoIdlesPerSecond;

                break;

            }

        }

    }

    NSTimer * t = [[NSTimer alloc] initWithFireDate:

                        [NSDate dateWithTimeIntervalSinceNow:1./(double)idlesPerSecond]

                            interval:1./(double)idlesPerSecond 

                            target:self 

                            selector:@selector(idleTimer:) 

                            userInfo:nil repeats:YES];

    [[NSRunLoop currentRunLoop] addTimer:t forMode:NSDefaultRunLoopMode];

    [[NSRunLoop currentRunLoop] addTimer:t forMode:NSModalPanelRunLoopMode];

    [[NSRunLoop currentRunLoop] addTimer:t forMode:NSEventTrackingRunLoopMode];

    mStopRequested = NO;

}

/*________________________________________________________________________________________

*/

- (OSStatus)preview

{

    OSStatus err = noErr;

    if ([self isPreviewing])

        goto bail;

    else if ([self isRecording])

        [self stop];

    // save capture path and channel usage state, as we're going to temporarily change them

    // to fake SGStartPreview.  We're going to use SGStartRecord instead, because when

    // SGStartPreview is called, the SGDataProc does not fire, and we're using the data proc

    // for video preview

    [mSavedCapturePath release];

    mSavedCapturePath = [mCapturePath retain];

    mSavedCaptureFlags = mCaptureFlags;

    [mSavedChannelUsages removeAllObjects];

    for (int i = 0; i < [mChans count]; i++)

    {

        SGChan* curChan = [mChans objectAtIndex:i];

        long usage = [curChan usage];

        [mSavedChannelUsages addObject:[NSNumber numberWithLong:usage]];

        if ([curChan isAudioChannel])

        {

            if (usage & seqGrabPreview)

                usage |= seqGrabPlayDuringRecord;

            else

                usage &= ~seqGrabPlayDuringRecord;

        }

        [curChan setUsage:usage];

    }

        // setting the seqGrabDontMakeMovie flag will prevent the

        // sequence grabber from writing any data to disk

    [self setCapturePath:nil flags:seqGrabDontMakeMovie];

    [self startTimer];

    BAILSETERR( SGStartRecord(mSeqGrab) );

    mPreviewing = YES;

bail:

    return err;

}

/*________________________________________________________________________________________

*/

- (OSStatus)record

{

    OSStatus err = noErr;

    if ([self isRecording])

        goto bail;

    if ([self isPreviewing])

        [self stop];

    [self startTimer];

    BAILSETERR( SGStartRecord(mSeqGrab) );

    mRecording = YES;

bail:

    return err;

}

/*________________________________________________________________________________________

*/

- (OSStatus)stop

{

    OSStatus err = noErr;

    if ([self isStopped])

        goto bail;

    mStopRequested = YES;

    BAILSETERR( SGStop(mSeqGrab) );

    if (mPreviewing)

    {

        // put the channel usages back the way you found them

        for (int i = 0; i < [mChans count]; i++)

        {

            long savedUsage = [(NSNumber*)[mSavedChannelUsages objectAtIndex:i] longValue];

            [(SGChan*)[mChans objectAtIndex:i] setUsage:savedUsage];

        }

    }

    mRecording = NO;

    mPreviewing = NO;

bail:

    return err;

}

/*________________________________________________________________________________________

*/

- (OSStatus)pause

{

    OSStatus err = noErr;

    if ([self isPreviewing] || [self isRecording])

        BAILSETERR( SGPause(mSeqGrab, seqGrabPause) );

bail:

    return err;

}

/*________________________________________________________________________________________

*/

- (OSStatus)resume

{

    OSStatus err = noErr;

    if ([self isPreviewing] || [self isRecording])

        BAILSETERR( SGPause(mSeqGrab, seqGrabUnpause) );

bail:

    return err;

}

/*________________________________________________________________________________________

*/

- (BOOL)isStopped

{

    return ( ![self isPreviewing] && ![self isRecording] );

}

/*________________________________________________________________________________________

*/

- (BOOL)isRecording

{

    return mRecording;

}

/*________________________________________________________________________________________

*/

- (BOOL)isPreviewing

{

    return mPreviewing;

}

/*________________________________________________________________________________________

*/

- (BOOL)isPaused

{

    Byte paused = 0;

    if ([self isPreviewing] || [self isRecording])

        SGGetPause(mSeqGrab, &paused);

    return (paused & seqGrabPause);  

}

/*________________________________________________________________________________________

*/

@end