static {
headerMap = new HashMap<String, Constructor<? extends RtspHeader>>();
requestMap = new HashMap<RtspRequest.Method, Class<? extends RtspRequest>>();
// 提前放入头信息类,请求类
try {
putHeader(ContentEncodingHeader.class); // TODO: Encoding问题
putHeader(ContentLengthHeader.class);
putHeader(ContentTypeHeader.class);
putHeader(CSeqHeader.class);
putHeader(SessionHeader.class);
putHeader(TransportHeader.class);
requestMap.put(RtspRequest.Method.OPTIONS, RtspOptionsRequest.class);
requestMap.put(RtspRequest.Method.SETUP, RtspSetupRequest.class);
requestMap.put(RtspRequest.Method.TEARDOWN, RtspTeardownRequest.class);
requestMap.put(RtspRequest.Method.DESCRIBE, RtspDescribeRequest.class);
requestMap.put(RtspRequest.Method.PLAY, RtspPlayRequest.class);
requestMap.put(RtspRequest.Method.PAUSE, RtspPauseRequest.class);
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* This method handles RTSP server responses
* */
public void incomingMessage(MessageBuffer buffer) throws Exception {
// read a message bytes data in buffer
ByteArrayInputStream in =
new ByteArrayInputStream(buffer.getData(), buffer.getOffset(), buffer.getLength());
int initial = in.available();
Message message = null;
try {
String line = readLine(in);
if (line.startsWith(Message.RTSP_TOKEN)) {
message = new RtspResponse(line);
} else {
RtspRequest.Method method = null;
try {
method = RtspRequest.Method.valueOf(line.substring(0, line.indexOf(' ')));
} catch (IllegalArgumentException ilae) {
}
// 从Map中取出相应类型的Request信息
Class<? extends RtspRequest> cls = requestMap.get(method);
if (cls != null) message = cls.getConstructor(String.class).newInstance(line);
else message = new RtspRequest(line);
}
while (true) {
line = readLine(in);
if (in == null) throw new Exception();
if (line.length() == 0) break;
Constructor<? extends RtspHeader> c =
headerMap.get(line.substring(0, line.indexOf(':')).toLowerCase());
if (c != null) message.addHeader(c.newInstance(line));
else message.addHeader(new RtspHeader(line));
}
buffer.setMessage(message);
try {
int length = ((ContentLengthHeader) message.getHeader(ContentLengthHeader.NAME)).getValue();
if (in.available() < length) throw new Exception();
RtspContent content = new RtspContent();
content.setDescription(message);
byte[] data = new byte[length];
in.read(data);
content.setBytes(data);
message.setEntityMessage(new RtspEntityMessage(message, content));
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
throw new Exception(e);
} finally {
// TODO:读取后更新buffer状态
buffer.setused(initial - in.available());
// buffer.discardData();
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}