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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 RTSP_SOURCE_H_
     18 
     19 #define RTSP_SOURCE_H_
     20 
     21 #include "NuPlayerSource.h"
     22 
     23 #include "ATSParser.h"
     24 
     25 namespace android {
     26 
     27 struct ALooper;
     28 struct AReplyToken;
     29 struct AnotherPacketSource;
     30 struct MyHandler;
     31 struct SDPLoader;
     32 
     33 struct NuPlayer::RTSPSource : public NuPlayer::Source {
     34     RTSPSource(
     35             const sp<AMessage> &notify,
     36             const sp<IMediaHTTPService> &httpService,
     37             const char *url,
     38             const KeyedVector<String8, String8> *headers,
     39             bool uidValid = false,
     40             uid_t uid = 0,
     41             bool isSDP = false);
     42 
     43     virtual void prepareAsync();
     44     virtual void start();
     45     virtual void stop();
     46 
     47     virtual status_t feedMoreTSData();
     48 
     49     virtual status_t dequeueAccessUnit(bool audio, sp<ABuffer> *accessUnit);
     50 
     51     virtual status_t getDuration(int64_t *durationUs);
     52     virtual status_t seekTo(int64_t seekTimeUs);
     53 
     54     void onMessageReceived(const sp<AMessage> &msg);
     55 
     56 protected:
     57     virtual ~RTSPSource();
     58 
     59     virtual sp<MetaData> getFormatMeta(bool audio);
     60 
     61 private:
     62     enum {
     63         kWhatNotify          = 'noti',
     64         kWhatDisconnect      = 'disc',
     65         kWhatPerformSeek     = 'seek',
     66         kWhatPollBuffering   = 'poll',
     67         kWhatSignalEOS       = 'eos ',
     68     };
     69 
     70     enum State {
     71         DISCONNECTED,
     72         CONNECTING,
     73         CONNECTED,
     74         SEEKING,
     75     };
     76 
     77     enum Flags {
     78         // Don't log any URLs.
     79         kFlagIncognito = 1,
     80     };
     81 
     82     // Buffer Prepare/Underflow/Overflow/Resume Marks
     83     static const int64_t kPrepareMarkUs;
     84     static const int64_t kUnderflowMarkUs;
     85     static const int64_t kOverflowMarkUs;
     86     static const int64_t kStartServerMarkUs;
     87 
     88     struct TrackInfo {
     89         sp<AnotherPacketSource> mSource;
     90 
     91         int32_t mTimeScale;
     92         uint32_t mRTPTime;
     93         int64_t mNormalPlaytimeUs;
     94         bool mNPTMappingValid;
     95     };
     96 
     97     sp<IMediaHTTPService> mHTTPService;
     98     AString mURL;
     99     KeyedVector<String8, String8> mExtraHeaders;
    100     bool mUIDValid;
    101     uid_t mUID;
    102     uint32_t mFlags;
    103     bool mIsSDP;
    104     State mState;
    105     status_t mFinalResult;
    106     sp<AReplyToken> mDisconnectReplyID;
    107     Mutex mBufferingLock;
    108     bool mBuffering;
    109     bool mInPreparationPhase;
    110     bool mEOSPending;
    111 
    112     sp<ALooper> mLooper;
    113     sp<MyHandler> mHandler;
    114     sp<SDPLoader> mSDPLoader;
    115 
    116     Vector<TrackInfo> mTracks;
    117     sp<AnotherPacketSource> mAudioTrack;
    118     sp<AnotherPacketSource> mVideoTrack;
    119 
    120     sp<ATSParser> mTSParser;
    121 
    122     int32_t mSeekGeneration;
    123 
    124     int64_t mEOSTimeoutAudio;
    125     int64_t mEOSTimeoutVideo;
    126 
    127     sp<AReplyToken> mSeekReplyID;
    128 
    129     sp<AnotherPacketSource> getSource(bool audio);
    130 
    131     void onConnected();
    132     void onSDPLoaded(const sp<AMessage> &msg);
    133     void onDisconnected(const sp<AMessage> &msg);
    134     void finishDisconnectIfPossible();
    135 
    136     void performSeek(int64_t seekTimeUs);
    137     void schedulePollBuffering();
    138     void checkBuffering(
    139             bool *prepared,
    140             bool *underflow,
    141             bool *overflow,
    142             bool *startServer,
    143             bool *finished);
    144     void onPollBuffering();
    145 
    146     bool haveSufficientDataOnAllTracks();
    147 
    148     void setEOSTimeout(bool audio, int64_t timeout);
    149     void setError(status_t err);
    150     void startBufferingIfNecessary();
    151     bool stopBufferingIfNecessary();
    152     void finishSeek(status_t err);
    153 
    154     void postSourceEOSIfNecessary();
    155     void signalSourceEOS(status_t result);
    156     void onSignalEOS(const sp<AMessage> &msg);
    157 
    158     bool sourceNearEOS(bool audio);
    159     bool sourceReachedEOS(bool audio);
    160 
    161     DISALLOW_EVIL_CONSTRUCTORS(RTSPSource);
    162 };
    163 
    164 }  // namespace android
    165 
    166 #endif  // RTSP_SOURCE_H_
    167