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#import <Cocoa/Cocoa.h>
#import <QuickTime/QuickTime.h>

@class SGChan;
@class SGVideo;
@class SGAudio;
@class SGSound;

extern NSString * SeqGrabChannelKey;

// following notifications send the SeqGrab * instance as the [notification object], and 
// the SGChan * in question as the value for the one key in the [notification userInfo] dictionary,
// where the key is SeqGrabChannelKey (above)

extern NSString * SeqGrabChannelRemovedNotification; 
extern NSString * SeqGrabChannelAddedNotification;



// this is a Cocoa wrapper for a SeqGrabComponent

@interface SeqGrab : NSObject {
    SeqGrabComponent    mSeqGrab;
	NSMutableArray *	mChans;
    UInt32              mIdlesPerSecond;
    BOOL                mStopRequested;
	
	NSString *			mCapturePath;
	long				mCaptureFlags;
	
    // This Cocoa wrapping of the Sequence Grabber overrides
    // the built in SeqGrab preview behavior - it never calls
    // SGStartPreview.  To accomplish preview, it calls SGStartRecord
    // + SGSetDataRef(dontMakeMovie).  We do this because we are
    // using the SGDataProc to preview video to an NSOpenGLView
    // subclass.  The SGDataProc does not fire when the Sequence Grabber
    // is in preview mode.  We need it to fire when previewing.
    // Since we're overriding preview, we need to keep track of
    // our state independent of the Sequence Grabber's built in
    // machinery (i.e. SGGetMode)
    BOOL				mPreviewing; 
	BOOL				mRecording;
	
    // Before previewing, we have to alter the usage of each channel,
    // so we stow each channel's usage away while previewing, then
    // restore it afterwards.
	NSMutableArray *	mSavedChannelUsages; 
	NSString *			mSavedCapturePath;
	long				mSavedCaptureFlags;
}

- (id)init;

- (NSArray *)channels;	// returns an array of all SGChan's instantiated
- (OSStatus)addChannel:(SGChan*)chan;
- (OSStatus)removeChannel:(SGChan*)chan;


- (SeqGrabComponent)seqGrabComponent;

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

- (OSStatus)setSettings:(NSData*)blob;
- (NSData *)settings;

- (void)setIdleFrequency:(UInt32)idlesPerSecond;
- (UInt32)idleFrequency;

- (OSStatus)setMaxRecordTime:(float)seconds;

- (OSStatus)preview;
- (OSStatus)record;
- (OSStatus)stop;
- (OSStatus)pause;
- (OSStatus)resume;

- (BOOL)isStopped;
- (BOOL)isRecording;
- (BOOL)isPreviewing;
- (BOOL)isPaused;

@end
