MediaSender.h revision a556c4822fc205db0d27834ba5b637c351d73ffa 
1/*
2 * Copyright 2013, 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 MEDIA_SENDER_H_
18
19#define MEDIA_SENDER_H_
20
21#include "rtp/RTPSender.h"
22
23#include <media/stagefright/foundation/ABase.h>
24#include <media/stagefright/foundation/AHandler.h>
25#include <utils/Errors.h>
26#include <utils/Vector.h>
27
28namespace android {
29
30struct ABuffer;
31struct ANetworkSession;
32struct AMessage;
33struct IHDCP;
34struct TSPacketizer;
35
36// This class facilitates sending of data from one or more media tracks
37// through one or more RTP channels, either providing a 1:1 mapping from
38// track to RTP channel or muxing all tracks into a single RTP channel and
39// using transport stream encapsulation.
40// Optionally the (video) data is encrypted using the provided hdcp object.
41struct MediaSender : public AHandler {
42    enum {
43        kWhatInitDone,
44        kWhatError,
45    };
46
47    MediaSender(
48            const sp<ANetworkSession> &netSession,
49            const sp<AMessage> &notify);
50
51    status_t setHDCP(const sp<IHDCP> &hdcp);
52
53    enum FlagBits {
54        FLAG_MANUALLY_PREPEND_SPS_PPS = 1,
55    };
56    ssize_t addTrack(const sp<AMessage> &format, uint32_t flags);
57
58    // If trackIndex == -1, initialize for transport stream muxing.
59    status_t initAsync(
60            ssize_t trackIndex,
61            RTPSender::TransportMode transportMode,
62            const char *remoteHost,
63            int32_t remoteRTPPort,
64            int32_t remoteRTCPPort,
65            int32_t *localRTPPort);
66
67    status_t queueAccessUnit(
68            size_t trackIndex, const sp<ABuffer> &accessUnit);
69
70protected:
71    virtual void onMessageReceived(const sp<AMessage> &msg);
72    virtual ~MediaSender();
73
74private:
75    enum {
76        kWhatSenderNotify,
77    };
78
79    enum Mode {
80        MODE_UNDEFINED,
81        MODE_TRANSPORT_STREAM,
82        MODE_ELEMENTARY_STREAMS,
83    };
84
85    struct TrackInfo {
86        sp<AMessage> mFormat;
87        uint32_t mFlags;
88        sp<RTPSender> mSender;
89        List<sp<ABuffer> > mAccessUnits;
90        ssize_t mPacketizerTrackIndex;
91        bool mIsAudio;
92    };
93
94    sp<ANetworkSession> mNetSession;
95    sp<AMessage> mNotify;
96
97    sp<IHDCP> mHDCP;
98
99    Mode mMode;
100    int32_t mGeneration;
101
102    Vector<TrackInfo> mTrackInfos;
103
104    sp<TSPacketizer> mTSPacketizer;
105    sp<RTPSender> mTSSender;
106    int64_t mPrevTimeUs;
107
108    size_t mInitDoneCount;
109
110    void onSenderNotify(const sp<AMessage> &msg);
111
112    void notifyInitDone(status_t err);
113    void notifyError(status_t err);
114
115    status_t packetizeAccessUnit(
116            size_t trackIndex,
117            sp<ABuffer> accessUnit,
118            sp<ABuffer> *tsPackets);
119
120    DISALLOW_EVIL_CONSTRUCTORS(MediaSender);
121};
122
123}  // namespace android
124
125#endif  // MEDIA_SENDER_H_
126
127