Problem with Obj C / AVFoundation in QMacCocoaViewContainer

ziggx

Hi there,

I'm trying to create a very lightweight media player, for OS X only, because the multimedia module uses way too much cpu time. My problem is that, although I have sound, I'm not seeing the picture. I'm sure I'm making a fundamental mistake somewhere but I can't seem to find the answer in the Apple Dev documentation. Here's what I've got so far:

avPlayer.h:

#define AVPLAYER_H

#include <QtCore>
#include <QMacCocoaViewContainer>

#ifdef __OBJC__
# define ADD_COCOA_NATIVE_REF(CocoaClass) \
    @class CocoaClass; \
    typedef CocoaClass *Native##CocoaClass##Ref
#else /* __OBJC__ */
# define ADD_COCOA_NATIVE_REF(CocoaClass) typedef void *Native##CocoaClass##Ref
#endif /* __OBJC__ */

ADD_COCOA_NATIVE_REF(xplayer);

class avPlayer:QWidget
{
    Q_OBJECT
public:
    avPlayer(QWidget *parent=NULL);
    ~avPlayer();
    void loadVideo(QString mf);
private:
    NativexplayerRef m_video;
    QMacCocoaViewContainer *m_container;
};

#endif // AVPLAYER_H

avPlayer.mm:

#include <Cocoa/Cocoa.h>
#include <AVFoundation/AVFoundation.h>

@interface xplayer:NSView
{
    AVPlayer *player;
    AVPlayerItem *playerItem;
    AVPlayerLayer *playerLayer;
    AVAsset *asset;
    CALayer *layer;
}
    @property (nonatomic, retain) AVPlayer *player;
    @property (nonatomic, retain) AVPlayerItem *playerItem;
    @property (nonatomic, retain) AVPlayerLayer *playerLayer;
    @property (nonatomic,retain) AVAsset *asset;
    @property (nonatomic, retain) CALayer *layer;
    -(id)initWithFrame:(NSRect)frame;
    -(void)loadFile:(NSString *)filename;
    -(void)play;
    -(void)stop;
@end


@implementation xplayer
@synthesize player, playerItem, playerLayer;

-(id)initWithFrame:(NSRect)frame
{
    self=[super initWithFrame:frame];
    if (self)
    {
        layer=[[CALayer alloc]init];
        [self setHidden:NO];
        [self setNeedsDisplay:YES];
        [self setWantsLayer:YES];
        [self makeBackingLayer];
        [self setLayer:layer];
        [layer setBackgroundColor:CGColorCreateGenericRGB(1.0, 0.0, 1.0, 1.0)];
    }
    return self;
}

-(void) loadFile:(NSString*)filename
{
        NSURL *f=[NSURL fileURLWithPath:filename];
        player=[AVPlayer playerWithURL:f ];
        playerLayer=[AVPlayerLayer playerLayerWithPlayer:player];
        [self.layer addSublayer:playerLayer];

        [self.layer display];
}

- (void) play {
    [self.player play];
}

- (void) stop {
    [self.player pause];
}

@end

avPlayer::avPlayer(QWidget *parent):QWidget(parent)
{
    m_video=[[xplayer alloc]init];
    m_container=new QMacCocoaViewContainer(0,this);
    m_container->setGeometry(parent->rect());
    m_container->setVisible(true);
    m_container->setCocoaView(m_video);
    m_container->setAttribute(Qt::WA_NativeWindow);
    m_container->setAutoFillBackground(true);
}

avPlayer::~avPlayer()
{

}

void avPlayer::loadVideo(QString mf)
{
    NSString *t=mf.toNSString();
    [m_video loadFile:t];
   // for testing play the video immediately after loading...
    [m_video play];
}

Any help or pointers would be gratefully received as my Objective C skills are virtually non existent.

TIA
Ziggy