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/*
 * RED5 Open Source Media Server - https://github.com/Red5/
 * 
 * Copyright 2006-2016 by respective authors (see below). All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.red5.server.net.rtmp.codec;

import org.apache.mina.core.buffer.IoBuffer;
import org.red5.server.net.rtmp.event.Aggregate;
import org.red5.server.net.rtmp.event.AudioData;
import org.red5.server.net.rtmp.event.BytesRead;
import org.red5.server.net.rtmp.event.ChunkSize;
import org.red5.server.net.rtmp.event.FlexMessage;
import org.red5.server.net.rtmp.event.Ping;
import org.red5.server.net.rtmp.event.Unknown;
import org.red5.server.net.rtmp.event.VideoData;
import org.red5.server.so.ISharedObjectMessage;

/**
 * Event decoder decodes event objects from incoming byte buffer.
 */
public interface IEventDecoder {

    /**
     * Decodes event of Unknown type.
     * 
     * @param dataType
     *            Data type
     * @param in
     *            Byte buffer to decode
     * @return Unknown event
     */
    public abstract Unknown decodeUnknown(byte dataType, IoBuffer in);

    /**
     * Decodes chunk size event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return ChunkSize event
     */
    public abstract ChunkSize decodeChunkSize(IoBuffer in);

    /**
     * Decodes shared object message event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return ISharedObjectMessage event
     */
    public abstract ISharedObjectMessage decodeSharedObject(IoBuffer in);

    /**
     * Decodes shared object message event from AMF3 encoding.
     * 
     * @param in
     *            Byte buffer to decode
     * @return ISharedObjectMessage event
     */
    public abstract ISharedObjectMessage decodeFlexSharedObject(IoBuffer in);

    /**
     * Decodes ping event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return Ping event
     */
    public abstract Ping decodePing(IoBuffer in);

    /**
     * Decodes BytesRead event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return BytesRead event
     */
    public abstract BytesRead decodeBytesRead(IoBuffer in);

    /**
     * Decodes the aggregated data.
     * 
     * @param in
     *            Byte buffer to decode
     * @return Aggregate event
     */
    public abstract Aggregate decodeAggregate(IoBuffer in);

    /**
     * Decodes audio data event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return AudioData event
     */
    public abstract AudioData decodeAudioData(IoBuffer in);

    /**
     * Decodes video data event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return VideoData event
     */
    public abstract VideoData decodeVideoData(IoBuffer in);

    /**
     * Decodes Flex message event.
     * 
     * @param in
     *            Byte buffer to decode
     * @return FlexMessage event
     */
    public abstract FlexMessage decodeFlexMessage(IoBuffer in);

}