AOO: #i124875# avoid wasteful loading of an AVAsset in MacAVF::Framegrabber

FrameGrabber used to load its own copy of a movie. Since multimedia content
is often very data-intensive this should and can be avoided by using the
movie asset already available in the Player.

Change-Id: I5ace1d1751b38839ef051ce0dc0328308325b269

4 files changed, 15 insertions, 25 deletions

diff --git a/avmedia/source/macavf/framegrabber.hxx b/avmedia/source/macavf/framegrabber.hxx
index 14020cd82e4c..0ac32cc37dd4 100644
--- a/avmedia/source/macavf/framegrabber.hxx
+++ b/avmedia/source/macavf/framegrabber.hxx
@@ -39,6 +39,7 @@ public:
     virtual  ~FrameGrabber();
 
     bool    create( const ::rtl::OUString& rURL );
+    bool    create( AVAsset* pMovie );
 
     // XFrameGrabber
     virtual ::com::sun::star::uno::Reference< ::com::sun::star::graphic::XGraphic > SAL_CALL grabFrame( double fMediaTime ) throw (::com::sun::star::uno::RuntimeException);
diff --git a/avmedia/source/macavf/framegrabber.mm b/avmedia/source/macavf/framegrabber.mm
index 9f06ebdd8c19..6c2609dd2962 100644
--- a/avmedia/source/macavf/framegrabber.mm
+++ b/avmedia/source/macavf/framegrabber.mm
@@ -49,8 +49,6 @@ FrameGrabber::~FrameGrabber()
 
 bool FrameGrabber::create( const ::rtl::OUString& rURL )
 {
-    // TODO: use AVPlayer's movie directly instead of loading it here?
-
     NSString* pNSStr = [NSString stringWithCharacters:rURL.getStr() length:rURL.getLength()];
     NSURL* pNSURL = [NSURL URLWithString: [pNSStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
     AVAsset* pMovie = [AVURLAsset URLAssetWithURL:pNSURL options:nil];
@@ -59,9 +57,17 @@ bool FrameGrabber::create( const ::rtl::OUString& rURL )
         OSL_TRACE( "AVGrabber::create() cannot load url=\"%s\"", [pNSStr UTF8String] );
         return false;
     }
+
+    return create( pMovie );
+}
+
+// ------------------------------------------------------------------------------
+
+bool FrameGrabber::create( AVAsset* pMovie )
+{
     if( [[pMovie tracksWithMediaType:AVMediaTypeVideo] count] == 0)
     {
-        OSL_TRACE( "AVGrabber::create() found no video in url=\"%s\"", [pNSStr UTF8String] );
+        OSL_TRACE( "AVGrabber::create() found no video content!" );
         return false;
     }
 
diff --git a/avmedia/source/macavf/player.hxx b/avmedia/source/macavf/player.hxx
index 2cdf8a1fd2b0..6bb4d3a22160 100644
--- a/avmedia/source/macavf/player.hxx
+++ b/avmedia/source/macavf/player.hxx
@@ -43,6 +43,7 @@ public:
     virtual  ~Player();
 
     bool create( const ::rtl::OUString& rURL );
+    bool create( AVAsset* );
 
     // XPlayer
     virtual void SAL_CALL start() throw (::com::sun::star::uno::RuntimeException);
@@ -69,15 +70,12 @@ public:
     virtual sal_Bool SAL_CALL supportsService( const ::rtl::OUString& ServiceName ) throw (::com::sun::star::uno::RuntimeException);
     virtual ::com::sun::star::uno::Sequence< ::rtl::OUString > SAL_CALL getSupportedServiceNames(  ) throw (::com::sun::star::uno::RuntimeException);
 
-    AVAsset* getMovie();
     AVPlayer* getAVPlayer() const { return mpPlayer; }
     virtual bool handleObservation( NSString* pKeyPath );
 
 private:
     ::com::sun::star::uno::Reference< ::com::sun::star::lang::XMultiServiceFactory > mxMgr;
 
-    ::rtl::OUString     maURL;
-
     AVPlayer*           mpPlayer;
 
     float               mfUnmutedVolume;
diff --git a/avmedia/source/macavf/player.mm b/avmedia/source/macavf/player.mm
index 38478da14be2..404083bde48a 100644
--- a/avmedia/source/macavf/player.mm
+++ b/avmedia/source/macavf/player.mm
@@ -110,17 +110,6 @@ Player::~Player()
 
 // ------------------------------------------------------------------------------
 
-AVAsset* Player::getMovie()
-{
-    if( !mpPlayer )
-        return nil;
-    AVAsset* pMovie = [[mpPlayer currentItem] asset];
-    OSL_ASSERT( pMovie );
-    return pMovie;
-}
-
-// ------------------------------------------------------------------------------
-
 bool Player::handleObservation( NSString* pKeyPath )
 {
     OSL_TRACE( "AVPlayer::handleObservation key=\"%s\"", [pKeyPath UTF8String]);
@@ -137,8 +126,6 @@ bool Player::handleObservation( NSString* pKeyPath )
 
 bool Player::create( const ::rtl::OUString& rURL )
 {
-    maURL = rURL;
-
     // get the media asset
     NSString* aNSStr = [NSString stringWithCharacters:rURL.getStr() length:rURL.getLength()];
     NSURL* aNSURL = [NSURL URLWithString: [aNSStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
@@ -431,12 +418,10 @@ uno::Reference< media::XFrameGrabber > SAL_CALL Player::createFrameGrabber()
     uno::Reference< media::XFrameGrabber > xRet;
     OSL_TRACE ("Player::createFrameGrabber");
 
-    if( !maURL.isEmpty() )
-    {
-        FrameGrabber* pGrabber = new FrameGrabber( mxMgr );
-        if( pGrabber->create( maURL ) )
-            xRet = pGrabber;
-    }
+    FrameGrabber* pGrabber = new FrameGrabber( mxMgr );
+    AVAsset* pMovie = [[mpPlayer currentItem] asset];
+    if( pGrabber->create( pMovie ) )
+        xRet = pGrabber;
 
     return xRet;
 }