Channel.java
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package cn.org.hentai.jtt1078.publisher;
import cn.org.hentai.jtt1078.codec.AudioCodec;
import cn.org.hentai.jtt1078.entity.Media;
import cn.org.hentai.jtt1078.entity.MediaEncoding;
import cn.org.hentai.jtt1078.flv.FlvEncoder;
import cn.org.hentai.jtt1078.subscriber.RTMPPublisher;
import cn.org.hentai.jtt1078.subscriber.Subscriber;
import cn.org.hentai.jtt1078.subscriber.VideoSubscriber;
import cn.org.hentai.jtt1078.util.ByteHolder;
import cn.org.hentai.jtt1078.util.Configs;
import io.netty.channel.ChannelHandlerContext;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Iterator;
import java.util.concurrent.ConcurrentLinkedQueue;
/**
* Created by matrixy on 2020/1/11.
*/
public class Channel
{
static Logger logger = LoggerFactory.getLogger(Channel.class);
ConcurrentLinkedQueue<Subscriber> subscribers;
RTMPPublisher rtmpPublisher;
String tag;
boolean publishing;
ByteHolder buffer;
AudioCodec audioCodec;
FlvEncoder flvEncoder;
private long firstTimestamp = -1;
public Channel(String tag)
{
this.tag = tag;
this.subscribers = new ConcurrentLinkedQueue<Subscriber>();
this.flvEncoder = new FlvEncoder(true, true);
this.buffer = new ByteHolder(2048 * 100);
if (StringUtils.isEmpty(Configs.get("rtmp.url")) == false)
{
rtmpPublisher = new RTMPPublisher(tag);
rtmpPublisher.start();
}
}
public boolean isPublishing()
{
return publishing;
}
public Subscriber subscribe(ChannelHandlerContext ctx)
{
logger.info("channel: {} -> {}, subscriber: {}", Long.toHexString(hashCode() & 0xffffffffL), tag, ctx.channel().remoteAddress().toString());
Subscriber subscriber = new VideoSubscriber(this.tag, ctx);
this.subscribers.add(subscriber);
return subscriber;
}
public void writeAudio(long timestamp, int pt, byte[] data)
{
if (audioCodec == null)
{
audioCodec = AudioCodec.getCodec(pt);
logger.info("audio codec: {}", MediaEncoding.getEncoding(Media.Type.Audio, pt));
}
broadcastAudio(timestamp, audioCodec.toPCM(data));
}
public void writeVideo(long sequence, long timeoffset, int payloadType, byte[] h264)
{
if (firstTimestamp == -1) firstTimestamp = timeoffset;
this.publishing = true;
this.buffer.write(h264);
while (true)
{
byte[] nalu = readNalu();
if (nalu == null) break;
if (nalu.length < 4) continue;
byte[] flvTag = this.flvEncoder.write(nalu, (int) (timeoffset - firstTimestamp));
if (flvTag == null) continue;
// 广播给所有的观众
broadcastVideo(timeoffset, flvTag);
}
}
public void writeVideoRtp(byte[] h264) {
}
public void broadcastVideo(long timeoffset, byte[] flvTag)
{
for (Subscriber subscriber : subscribers)
{
subscriber.onVideoData(timeoffset, flvTag, flvEncoder);
}
}
public void broadcastAudio(long timeoffset, byte[] flvTag)
{
for (Subscriber subscriber : subscribers)
{
subscriber.onAudioData(timeoffset, flvTag, flvEncoder);
}
}
public void unsubscribe(long watcherId)
{
for (Iterator<Subscriber> itr = subscribers.iterator(); itr.hasNext(); )
{
Subscriber subscriber = itr.next();
if (subscriber.getId() == watcherId)
{
itr.remove();
subscriber.close();
return;
}
}
}
public void close()
{
for (Iterator<Subscriber> itr = subscribers.iterator(); itr.hasNext(); )
{
Subscriber subscriber = itr.next();
subscriber.close();
itr.remove();
}
if (rtmpPublisher != null) rtmpPublisher.close();
}
private byte[] readNalu()
{
for (int i = 0; i < buffer.size() - 3; i++)
{
int a = buffer.get(i + 0) & 0xff;
int b = buffer.get(i + 1) & 0xff;
int c = buffer.get(i + 2) & 0xff;
int d = buffer.get(i + 3) & 0xff;
if (a == 0x00 && b == 0x00 && c == 0x00 && d == 0x01)
{
if (i == 0) continue;
byte[] nalu = new byte[i];
buffer.sliceInto(nalu, i);
//System.out.println(nalu.length);
//System.out.println(toHex(nalu));
return nalu;
}
}
return null;
}
public String toHex(byte[] bytes) {
StringBuilder sb = new StringBuilder();
for (byte b : bytes) {
sb.append(String.format("%02X ", b));
}
return sb.toString();
}
}