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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef A_RTSP_CONNECTION_H_
     18 
     19 #define A_RTSP_CONNECTION_H_
     20 
     21 #include <media/stagefright/foundation/AHandler.h>
     22 #include <media/stagefright/foundation/AString.h>
     23 
     24 namespace android {
     25 
     26 struct ABuffer;
     27 
     28 struct ARTSPResponse : public RefBase {
     29     unsigned long mStatusCode;
     30     AString mStatusLine;
     31     KeyedVector<AString,AString> mHeaders;
     32     sp<ABuffer> mContent;
     33 };
     34 
     35 struct ARTSPConnection : public AHandler {
     36     ARTSPConnection();
     37 
     38     void connect(const char *url, const sp<AMessage> &reply);
     39     void disconnect(const sp<AMessage> &reply);
     40 
     41     void sendRequest(const char *request, const sp<AMessage> &reply);
     42 
     43     void observeBinaryData(const sp<AMessage> &reply);
     44 
     45 protected:
     46     virtual ~ARTSPConnection();
     47     virtual void onMessageReceived(const sp<AMessage> &msg);
     48 
     49 private:
     50     enum State {
     51         DISCONNECTED,
     52         CONNECTING,
     53         CONNECTED,
     54     };
     55 
     56     enum {
     57         kWhatConnect            = 'conn',
     58         kWhatDisconnect         = 'disc',
     59         kWhatCompleteConnection = 'comc',
     60         kWhatSendRequest        = 'sreq',
     61         kWhatReceiveResponse    = 'rres',
     62         kWhatObserveBinaryData  = 'obin',
     63     };
     64 
     65     static const int64_t kSelectTimeoutUs;
     66 
     67     State mState;
     68     int mSocket;
     69     int32_t mConnectionID;
     70     int32_t mNextCSeq;
     71     bool mReceiveResponseEventPending;
     72 
     73     KeyedVector<int32_t, sp<AMessage> > mPendingRequests;
     74 
     75     sp<AMessage> mObserveBinaryMessage;
     76 
     77     void onConnect(const sp<AMessage> &msg);
     78     void onDisconnect(const sp<AMessage> &msg);
     79     void onCompleteConnection(const sp<AMessage> &msg);
     80     void onSendRequest(const sp<AMessage> &msg);
     81     void onReceiveResponse();
     82 
     83     void flushPendingRequests();
     84     void postReceiveReponseEvent();
     85 
     86     // Return false iff something went unrecoverably wrong.
     87     bool receiveRTSPReponse();
     88     status_t receive(void *data, size_t size);
     89     bool receiveLine(AString *line);
     90     sp<ABuffer> receiveBinaryData();
     91     bool notifyResponseListener(const sp<ARTSPResponse> &response);
     92 
     93     static bool ParseURL(
     94             const char *url, AString *host, unsigned *port, AString *path);
     95 
     96     static bool ParseSingleUnsignedLong(
     97             const char *from, unsigned long *x);
     98 
     99     DISALLOW_EVIL_CONSTRUCTORS(ARTSPConnection);
    100 };
    101 
    102 }  // namespace android
    103 
    104 #endif  // A_RTSP_CONNECTION_H_
    105