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/*
* Copyright 2012, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SENDER_H_
#define SENDER_H_
#include <media/stagefright/foundation/AHandler.h>
namespace android {
#define LOG_TRANSPORT_STREAM 0
#define TRACK_BANDWIDTH 0
#define ENABLE_RETRANSMISSION 0
// If retransmission is enabled the following define determines what
// kind we support, if RETRANSMISSION_ACCORDING_TO_RFC_XXXX is 0
// we'll send NACKs on the original RTCP channel and retransmit packets
// on the original RTP channel, otherwise a separate channel pair is used
// for this purpose.
#define RETRANSMISSION_ACCORDING_TO_RFC_XXXX 0
struct ABuffer;
struct ANetworkSession;
struct Sender : public AHandler {
Sender(const sp<ANetworkSession> &netSession, const sp<AMessage> ¬ify);
enum {
kWhatInitDone,
kWhatSessionDead,
kWhatBinaryData,
};
enum TransportMode {
TRANSPORT_UDP,
TRANSPORT_TCP_INTERLEAVED,
TRANSPORT_TCP,
};
status_t init(
const char *clientIP, int32_t clientRtp, int32_t clientRtcp,
TransportMode transportMode);
status_t finishInit();
int32_t getRTPPort() const;
void queuePackets(int64_t timeUs, const sp<ABuffer> &tsPackets);
void scheduleSendSR();
protected:
virtual ~Sender();
virtual void onMessageReceived(const sp<AMessage> &msg);
private:
enum {
kWhatDrainQueue,
kWhatSendSR,
kWhatRTPNotify,
kWhatRTCPNotify,
#if ENABLE_RETRANSMISSION && RETRANSMISSION_ACCORDING_TO_RFC_XXXX
kWhatRTPRetransmissionNotify,
kWhatRTCPRetransmissionNotify,
#endif
};
static const int64_t kSendSRIntervalUs = 10000000ll;
static const uint32_t kSourceID = 0xdeadbeef;
static const size_t kMaxHistoryLength = 128;
#if ENABLE_RETRANSMISSION && RETRANSMISSION_ACCORDING_TO_RFC_XXXX
static const size_t kRetransmissionPortOffset = 120;
#endif
sp<ANetworkSession> mNetSession;
sp<AMessage> mNotify;
TransportMode mTransportMode;
AString mClientIP;
// in TCP mode
int32_t mRTPChannel;
int32_t mRTCPChannel;
// in UDP mode
int32_t mRTPPort;
int32_t mRTPSessionID;
int32_t mRTCPSessionID;
#if ENABLE_RETRANSMISSION && RETRANSMISSION_ACCORDING_TO_RFC_XXXX
int32_t mRTPRetransmissionSessionID;
int32_t mRTCPRetransmissionSessionID;
#endif
int32_t mClientRTPPort;
int32_t mClientRTCPPort;
bool mRTPConnected;
bool mRTCPConnected;
int64_t mFirstOutputBufferReadyTimeUs;
int64_t mFirstOutputBufferSentTimeUs;
uint32_t mRTPSeqNo;
#if ENABLE_RETRANSMISSION && RETRANSMISSION_ACCORDING_TO_RFC_XXXX
uint32_t mRTPRetransmissionSeqNo;
#endif
uint64_t mLastNTPTime;
uint32_t mLastRTPTime;
uint32_t mNumRTPSent;
uint32_t mNumRTPOctetsSent;
uint32_t mNumSRsSent;
bool mSendSRPending;
#if ENABLE_RETRANSMISSION
List<sp<ABuffer> > mHistory;
size_t mHistoryLength;
#endif
#if TRACK_BANDWIDTH
int64_t mFirstPacketTimeUs;
uint64_t mTotalBytesSent;
#endif
#if LOG_TRANSPORT_STREAM
FILE *mLogFile;
#endif
void onSendSR();
void addSR(const sp<ABuffer> &buffer);
void addSDES(const sp<ABuffer> &buffer);
static uint64_t GetNowNTP();
#if ENABLE_RETRANSMISSION
status_t parseTSFB(const uint8_t *data, size_t size);
void addToHistory(const uint8_t *rtp, size_t rtpPacketSize);
#endif
status_t parseRTCP(const sp<ABuffer> &buffer);
status_t sendPacket(int32_t sessionID, const void *data, size_t size);
void notifyInitDone();
void notifySessionDead();
void onDrainQueue(const sp<ABuffer> &udpPackets);
DISALLOW_EVIL_CONSTRUCTORS(Sender);
};
} // namespace android
#endif // SENDER_H_
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