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/*
* Copyright 2013, 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 RTP_RECEIVER_H_
#define RTP_RECEIVER_H_
#include "RTPBase.h"
#include <media/stagefright/foundation/AHandler.h>
namespace android {
struct ABuffer;
struct ANetworkSession;
// An object of this class facilitates receiving of media data on an RTP
// channel. The channel is established over a UDP or TCP connection depending
// on which "TransportMode" was chosen. In addition different RTP packetization
// schemes are supported such as "Transport Stream Packets over RTP",
// or "AVC/H.264 encapsulation as specified in RFC 3984 (non-interleaved mode)"
struct RTPReceiver : public RTPBase, public AHandler {
enum {
kWhatInitDone,
kWhatError,
kWhatAccessUnit,
kWhatPacketLost,
};
RTPReceiver(
const sp<ANetworkSession> &netSession,
const sp<AMessage> ¬ify);
status_t registerPacketType(
uint8_t packetType, PacketizationMode mode);
status_t initAsync(
TransportMode rtpMode,
TransportMode rtcpMode,
int32_t *outLocalRTPPort);
status_t connect(
const char *remoteHost,
int32_t remoteRTPPort,
int32_t remoteRTCPPort);
status_t informSender(const sp<AMessage> ¶ms);
protected:
virtual ~RTPReceiver();
virtual void onMessageReceived(const sp<AMessage> &msg);
private:
enum {
kWhatRTPNotify,
kWhatRTCPNotify,
kWhatSendRR,
};
enum {
kSourceID = 0xdeadbeef,
kPacketLostAfterUs = 100000,
kRequestRetransmissionAfterUs = -1,
};
struct Assembler;
struct H264Assembler;
struct Source;
struct TSAssembler;
sp<ANetworkSession> mNetSession;
sp<AMessage> mNotify;
TransportMode mRTPMode;
TransportMode mRTCPMode;
int32_t mRTPSessionID;
int32_t mRTCPSessionID;
bool mRTPConnected;
bool mRTCPConnected;
int32_t mRTPClientSessionID; // in TRANSPORT_TCP mode.
int32_t mRTCPClientSessionID; // in TRANSPORT_TCP mode.
KeyedVector<uint8_t, PacketizationMode> mPacketTypes;
KeyedVector<uint32_t, sp<Source> > mSources;
void onNetNotify(bool isRTP, const sp<AMessage> &msg);
status_t onRTPData(const sp<ABuffer> &data);
status_t onRTCPData(const sp<ABuffer> &data);
void onSendRR();
void scheduleSendRR();
void addSDES(const sp<ABuffer> &buffer);
void notifyInitDone(status_t err);
void notifyError(status_t err);
void notifyPacketLost();
sp<Assembler> makeAssembler(uint8_t packetType);
void requestRetransmission(uint32_t senderSSRC, int32_t extSeqNo);
DISALLOW_EVIL_CONSTRUCTORS(RTPReceiver);
};
} // namespace android
#endif // RTP_RECEIVER_H_
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