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/* 
 * Copyright (c) 2008 Wayne Meissner
 * Copyright (C) 1999,2000 Erik Walthinsen 
 *                    2000 Wim Taymans 
 *                    2005 Wim Taymans 
 * 
 * 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 .
 */

package org.gstreamer.event;

import org.gstreamer.Event;
import org.gstreamer.Format;
import org.gstreamer.lowlevel.GstNative;

import com.sun.jna.Pointer;

/**
 * Notification of new latency adjustment.
 * 

* The event is sent upstream from the sinks and * notifies elements that they should add an additional latency to the * timestamps before synchronising against the clock. *

* The latency is mostly used in live sinks and is always expressed in * the time format. */ public class BufferSizeEvent extends Event { private static interface API extends com.sun.jna.Library { Pointer ptr_gst_event_new_buffer_size(Format format, long minsize, long maxsize, boolean async); void gst_event_parse_buffer_size(Event event, Format[] format, long[] minsize, long[] maxsize, boolean[] async); } private static final API gst = GstNative.load(API.class); /** * This constructor is for internal use only. * @param init initialization data. */ public BufferSizeEvent(Initializer init) { super(init); } /** * Creates a new buffersize event. *

The event is sent downstream and notifies elements that they should * provide a buffer of the specified dimensions. * *

When the async flag is set, a thread boundary is preferred. * * @param format buffer format * @param minsize minimum buffer size * @param maxsize maximum buffer size * @param async thread behavior */ public BufferSizeEvent(Format format, long minsize, long maxsize, boolean async) { super(initializer(gst.ptr_gst_event_new_buffer_size(format, minsize, maxsize, async))); } /** * Gets the format of the buffersize event. * * @return the format. */ public Format getFormat() { Format[] format = new Format[1]; gst.gst_event_parse_buffer_size(this, format, null, null, null); return format[0]; } /** * Gets the minimum buffer size. * * @return the minimum buffer size. */ public long getMinimumSize() { long[] size = { 0 }; gst.gst_event_parse_buffer_size(this, null, size, null, null); return size[0]; } /** * Gets the maximum buffer size. * * @return the maximum buffer size. */ public long getMaximumSize() { long[] size = { 0 }; gst.gst_event_parse_buffer_size(this, null, null, size, null); return size[0]; } /** * Gets the preferred thread behaviour. * * @return true if a thread boundary is preferred. */ public boolean isAsync() { boolean[] async = { false }; gst.gst_event_parse_buffer_size(this, null, null, null, async); return async[0]; } }





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