AllocationQuery.java

/*
 * Copyright (c) 2016 Christophe Lafolet
 *
 * This file is part of gstreamer-java.
 *
 * This code is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 3 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * version 3 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with this work.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.freedesktop.gstreamer.query;

import org.freedesktop.gstreamer.BufferPool;
import org.freedesktop.gstreamer.Caps;
import org.freedesktop.gstreamer.Query;
import org.freedesktop.gstreamer.Structure;
import org.freedesktop.gstreamer.lowlevel.GType;
import org.freedesktop.gstreamer.lowlevel.GstQueryAPI;

import com.sun.jna.Pointer;

public class AllocationQuery extends Query {
    /**
     * This constructor is for internal use only.
     * @param init initialization data.
     */
    public AllocationQuery(Initializer init) {
    	// special case : no ref shall be added
    	// the allocationQuery is an in/out parameter during query notification
    	// so, we shall keep query writable for add methods
        super(initializer(init.ptr, false, true));        
    }

    public AllocationQuery(Caps caps, boolean need_pool) {
        this(initializer(GstQueryAPI.GSTQUERY_API.ptr_gst_query_new_allocation(caps, need_pool)));
    }

    public boolean isPoolNeeded() {
    	boolean[] need_pool = {false};
    	GstQueryAPI.GSTQUERY_API.gst_query_parse_allocation(this, null, need_pool);
    	return need_pool[0];
    }

    public Caps getCaps() {
    	Pointer[] ptr = new Pointer[1];
    	GstQueryAPI.GSTQUERY_API.gst_query_parse_allocation(this, ptr, null);
    	return new Caps(new Initializer(ptr[0], false, true));
    }

    public void addAllocationMeta(GType api, Structure params) {
    	GstQueryAPI.GSTQUERY_API.gst_query_add_allocation_meta(this, api, params);
    }

    public void addBufferPool(BufferPool pool, int size, int min_buffers, int max_buffers) {
    	GstQueryAPI.GSTQUERY_API.gst_query_add_allocation_pool(this, pool, size, min_buffers, max_buffers);
    }
}