mlt_filter.c

[melted] / src / framework / mlt_deque.c

diff --git a/src/framework/mlt_deque.c b/src/framework/mlt_deque.c
index d5ec8d8..6deecff 100644 (file)
--- a/src/framework/mlt_deque.c
+++ b/src/framework/mlt_deque.c
@@ -29,6 +29,7 @@ typedef union
 {
        void *addr;
        int value;
+       double floating;
 }
 deque_entry;
 
@@ -216,6 +217,75 @@ int mlt_deque_peek_front_int( mlt_deque this )
        return this->count > 0 ? this->list[ 0 ].value : 0;
 }
 
+/** Push an item to the end.
+*/
+
+int mlt_deque_push_back_double( mlt_deque this, double item )
+{
+       int error = mlt_deque_allocate( this );
+
+       if ( error == 0 )
+               this->list[ this->count ++ ].floating = item;
+
+       return error;
+}
+
+/** Pop an item.
+*/
+
+double mlt_deque_pop_back_double( mlt_deque this )
+{
+       return this->count > 0 ? this->list[ -- this->count ].floating : 0;
+}
+
+/** Queue an item at the start.
+*/
+
+int mlt_deque_push_front_double( mlt_deque this, double item )
+{
+       int error = mlt_deque_allocate( this );
+
+       if ( error == 0 )
+       {
+               memmove( &this->list[ 1 ], this->list, ( this->count ++ ) * sizeof( deque_entry ) );
+               this->list[ 0 ].floating = item;
+       }
+
+       return error;
+}
+
+/** Remove an item from the start.
+*/
+
+double mlt_deque_pop_front_double( mlt_deque this )
+{
+       double item = 0;
+
+       if ( this->count > 0 )
+       {
+               item = this->list[ 0 ].floating;
+               memmove( this->list, &this->list[ 1 ], ( -- this->count ) * sizeof( deque_entry ) );
+       }
+
+       return item;
+}
+
+/** Inquire on item at back of deque but don't remove.
+*/
+
+double mlt_deque_peek_back_double( mlt_deque this )
+{
+       return this->count > 0 ? this->list[ this->count - 1 ].floating : 0;
+}
+
+/** Inquire on item at front of deque but don't remove.
+*/
+
+double mlt_deque_peek_front_double( mlt_deque this )
+{
+       return this->count > 0 ? this->list[ 0 ].floating : 0;
+}
+
 /** Close the queue.
 */