org.freedesktop.gstreamer.query.SeekingQuery Maven / Gradle / Ivy

/* 
 * Copyright (C) 2019 Neil C Smith
 * 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.freedesktop.gstreamer.query;

import org.freedesktop.gstreamer.Format;
import org.freedesktop.gstreamer.glib.Natives;
import org.freedesktop.gstreamer.lowlevel.GstQueryAPI;

/**
 * Used for querying the seeking properties of the stream.
 * 
 * See upstream documentation at
 * https://gstreamer.freedesktop.org/data/doc/gstreamer/stable/gstreamer/html/GstQuery.html#gst-query-new-seeking
 * 
 */
public class SeekingQuery extends Query {

    SeekingQuery(Initializer init) {
        super(init);
    }

    /**
     * Constructs a new query object for querying seeking properties of the
     * stream.
     *
     * @param format the default {@link Format} for the new query.
     */
    public SeekingQuery(Format format) {
        this(Natives.initializer(GstQueryAPI.GSTQUERY_API.ptr_gst_query_new_seeking(format)));
    }

    /**
     * Sets the seeking query result fields.
     *
     * @param format the format to set for the {@code start} and {@code end}
     * values.
     * @param seekable the seekable flag to set
     * @param start the start of the segment.
     * @param end the end of the segment.
     */
    public void setSeeking(Format format, boolean seekable, long start, long end) {
        GstQueryAPI.GSTQUERY_API.gst_query_set_seeking(this, format, seekable, start, end);
    }

    /**
     * Checks if the stream is seekable.
     *
     * @return {@code true} if the stream is seekable.
     */
    public boolean isSeekable() {
        boolean[] value = {false};
        GstQueryAPI.GSTQUERY_API.gst_query_parse_seeking(this, null, value, null, null);
        return value[0];
    }

    /**
     * Gets the {@link Format} of the start and end values for the segment.
     *
     * @return the format of the start and end values.
     */
    public Format getFormat() {
        Format[] value = {Format.UNDEFINED};
        GstQueryAPI.GSTQUERY_API.gst_query_parse_seeking(this, value, null, null, null);
        return value[0];
    }

    /**
     * Gets the start of the segment.
     *
     * @return the start of the segment.
     */
    public long getStart() {
        long[] value = {0};
        GstQueryAPI.GSTQUERY_API.gst_query_parse_seeking(this, null, null, value, null);
        return value[0];
    }

    /**
     * Gets the end of the segment.
     *
     * @return the end of the segment.
     */
    public long getEnd() {
        long[] value = {0};
        GstQueryAPI.GSTQUERY_API.gst_query_parse_seeking(this, null, null, null, value);
        return value[0];
    }
}