Next/Prev key extraction

[melted] / src / framework / mlt_geometry.c

diff --git a/src/framework/mlt_geometry.c b/src/framework/mlt_geometry.c
index 7a9944c..2bfbe77 100644 (file)
--- a/src/framework/mlt_geometry.c
+++ b/src/framework/mlt_geometry.c
@@ -173,6 +173,11 @@ static int mlt_geometry_drop( mlt_geometry this, geometry_item item )
                        self->item->data.f[4] = 1;
                }
        }
+       else if ( item->next != NULL && item->prev != NULL )
+       {
+               item->prev->next = item->next;
+               item->next->prev = item->prev;
+       }
        else if ( item->next != NULL )
        {
                item->next->prev = item->prev;
@@ -180,7 +185,6 @@ static int mlt_geometry_drop( mlt_geometry this, geometry_item item )
        else if ( item->prev != NULL )
        {
                item->prev->next = item->next;
-               item->next->prev = item->prev;
        }
 
        free( item );
@@ -520,7 +524,7 @@ int mlt_geometry_remove( mlt_geometry this, int position )
        // Get the first item
        geometry_item place = self->item;
 
-       while( place != NULL && position < place->data.frame )
+       while( place != NULL && position != place->data.frame )
                place = place->next;
 
        if ( place != NULL && position == place->data.frame )
@@ -533,7 +537,7 @@ int mlt_geometry_remove( mlt_geometry this, int position )
 }
 
 // Get the key at the position or the next following
-int mlt_geometry_key( mlt_geometry this, mlt_geometry_item item, int position )
+int mlt_geometry_next_key( mlt_geometry this, mlt_geometry_item item, int position )
 {
        // Get the local/private geometry structure
        geometry self = this->local;
@@ -550,6 +554,24 @@ int mlt_geometry_key( mlt_geometry this, mlt_geometry_item item, int position )
        return place == NULL;
 }
 
+// Get the key at the position or the previous key
+int mlt_geometry_prev_key( mlt_geometry this, mlt_geometry_item item, int position )
+{
+       // Get the local/private geometry structure
+       geometry self = this->local;
+
+       // Get the first item
+       geometry_item place = self->item;
+
+       while( place != NULL && place->next != NULL && position >= place->next->data.frame )
+               place = place->next;
+
+       if ( place != NULL )
+               memcpy( item, &place->data, sizeof( struct mlt_geometry_item_s ) );
+
+       return place == NULL;
+}
+
 char *mlt_geometry_serialise_cut( mlt_geometry this, int in, int out )
 {
        struct mlt_geometry_item_s item;
@@ -590,7 +612,7 @@ char *mlt_geometry_serialise_cut( mlt_geometry this, int in, int out )
                        // Typically, we move from key to key
                        else if ( item.frame < out )
                        {
-                               if ( mlt_geometry_key( this, &item, item.frame ) )
+                               if ( mlt_geometry_next_key( this, &item, item.frame ) )
                                        break;
 
                                // Special case - crop at the out point