Mlt Ref Counts and Playlist split/join

[melted] / src / framework / mlt_playlist.c

diff --git a/src/framework/mlt_playlist.c b/src/framework/mlt_playlist.c
index 440c924..04e61d4 100644 (file)
--- a/src/framework/mlt_playlist.c
+++ b/src/framework/mlt_playlist.c
@@ -73,6 +73,10 @@ mlt_playlist mlt_playlist_init( )
                // Override the producer get_frame
                producer->get_frame = producer_get_frame;
 
+               // Define the destructor
+               producer->close = ( mlt_destructor )mlt_playlist_close;
+               producer->close_object = this;
+
                // Initialise blank
                mlt_producer_init( &this->blank, NULL );
                mlt_properties_set( mlt_producer_properties( &this->blank ), "mlt_service", "blank" );
@@ -187,6 +191,8 @@ static int mlt_playlist_virtual_append( mlt_playlist this, mlt_producer producer
 
        this->count ++;
 
+       mlt_properties_inc_ref( mlt_producer_properties( producer ) );
+
        return mlt_playlist_virtual_refresh( this );
 }
 
@@ -442,6 +448,9 @@ int mlt_playlist_count( mlt_playlist this )
 
 int mlt_playlist_clear( mlt_playlist this )
 {
+       int i;
+       for ( i = 0; i < this->count; i ++ )
+               mlt_producer_close( this->list[ i ]->producer );
        this->count = 0;
        mlt_properties_set_double( mlt_playlist_properties( this ), "first_fps", 0 );
        return mlt_playlist_virtual_refresh( this );
@@ -515,6 +524,9 @@ int mlt_playlist_remove( mlt_playlist this, int where )
                // Get the clip info of the clip to be removed
                mlt_playlist_get_clip_info( this, &where_info, where );
 
+               // Close the producer associated to the clip info
+               mlt_producer_close( where_info.producer );
+
                // Reorganise the list
                for ( i = where + 1; i < this->count; i ++ )
                        this->list[ i - 1 ] = this->list[ i ];
@@ -620,6 +632,68 @@ int mlt_playlist_resize_clip( mlt_playlist this, int clip, mlt_position in, mlt_
        return error;
 }
 
+/** Split a clip on the playlist at the given position.
+*/
+
+int mlt_playlist_split( mlt_playlist this, int clip, mlt_position position )
+{
+       int error = clip < 0 || clip >= this->count;
+       if ( error == 0 )
+       {
+               playlist_entry *entry = this->list[ clip ];
+               if ( position > 0 && position < entry->frame_count )
+               {
+                       int in = entry->frame_in;
+                       int out = entry->frame_out;
+                       mlt_playlist_resize_clip( this, clip, in, in + position );
+                       mlt_playlist_insert( this, entry->producer, clip + 1, in + position + 1, out );
+               }
+               else
+               {
+                       error = 1;
+               }
+       }
+       return error;
+}
+
+/** Join 1 or more consecutive clips.
+*/
+
+int mlt_playlist_join( mlt_playlist this, int clip, int count, int merge )
+{
+       int error = clip < 0 || ( clip + 1 ) >= this->count;
+       if ( error == 0 )
+       {
+               int i = clip;
+               mlt_playlist new_clip = mlt_playlist_init( );
+               if ( clip + count >= this->count )
+                       count = this->count - clip;
+               for ( i = 0; i <= count; i ++ )
+               {
+                       playlist_entry *entry = this->list[ clip ];
+                       char *resource = mlt_properties_get( mlt_producer_properties( entry->producer ), "resource" );
+                       if ( merge && resource != NULL && !strcmp( resource, "<playlist>" ) )
+                       {
+                               mlt_playlist old_clip = ( mlt_playlist )entry->producer;
+                               while( old_clip->count )
+                               {
+                                       entry = old_clip->list[ 0 ];
+                                       mlt_playlist_append_io( new_clip, entry->producer, entry->frame_in, entry->frame_out );
+                                       mlt_playlist_remove( old_clip, 0 );
+                               }
+                       }
+                       else
+                       {
+                               mlt_playlist_append_io( new_clip, entry->producer, entry->frame_in, entry->frame_out );
+                       }
+                       mlt_playlist_remove( this, clip );
+               }
+               mlt_playlist_insert( this, mlt_playlist_producer( new_clip ), clip, 0, -1 );
+               mlt_playlist_close( new_clip );
+       }
+       return error;
+}
+
 /** Get the current frame.
 */
 
@@ -662,11 +736,18 @@ static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int i
 
 void mlt_playlist_close( mlt_playlist this )
 {
-       int i = 0;
-       mlt_producer_close( &this->parent );
-       mlt_producer_close( &this->blank );
-       for ( i = 0; i < this->count; i ++ )
-               free( this->list[ i ] );
-       free( this->list );
-       free( this );
+       if ( this != NULL && mlt_properties_dec_ref( mlt_playlist_properties( this ) ) <= 0 )
+       {
+               int i = 0;
+               this->parent.close = NULL;
+               mlt_producer_close( &this->parent );
+               mlt_producer_close( &this->blank );
+               for ( i = 0; i < this->count; i ++ )
+               {
+                       mlt_producer_close( this->list[ i ]->producer );
+                       free( this->list[ i ] );
+               }
+               free( this->list );
+               free( this );
+       }
 }