537 lines
17 KiB
C++
537 lines
17 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* ViEChannel.cpp
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*/
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#include "vie_receiver.h"
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#include "critical_section_wrapper.h"
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#include "rtp_rtcp.h"
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#ifdef WEBRTC_SRTP
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#include "SrtpModule.h"
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#endif
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#include "video_coding.h"
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#include "rtp_dump.h"
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#include "trace.h"
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namespace webrtc {
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// ----------------------------------------------------------------------------
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// Constructor
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// ----------------------------------------------------------------------------
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ViEReceiver::ViEReceiver(int engineId, int channelId,
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RtpRtcp& moduleRtpRtcp,
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VideoCodingModule& moduleVcm)
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: _receiveCritsect(*CriticalSectionWrapper::CreateCriticalSection()),
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_engineId(engineId), _channelId(channelId), _rtpRtcp(moduleRtpRtcp),
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_vcm(moduleVcm),
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#ifdef WEBRTC_SRTP
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_ptrSrtp(NULL),
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_ptrSrtcp(NULL),
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_ptrSrtpBuffer(NULL),
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_ptrSrtcpBuffer(NULL),
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#endif
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_ptrExternalDecryption(NULL), _ptrDecryptionBuffer(NULL),
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_rtpDump(NULL), _receiving(false)
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{
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_rtpRtcp.RegisterIncomingVideoCallback(this);
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}
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// ----------------------------------------------------------------------------
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// Destructor
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// ----------------------------------------------------------------------------
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ViEReceiver::~ViEReceiver()
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{
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delete &_receiveCritsect;
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#ifdef WEBRTC_SRTP
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if (_ptrSrtpBuffer)
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{
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delete [] _ptrSrtpBuffer;
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_ptrSrtpBuffer = NULL;
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}
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if (_ptrSrtcpBuffer)
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{
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delete [] _ptrSrtcpBuffer;
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_ptrSrtcpBuffer = NULL;
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}
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#endif
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if (_ptrDecryptionBuffer)
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{
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delete[] _ptrDecryptionBuffer;
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_ptrDecryptionBuffer = NULL;
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}
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if (_rtpDump)
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{
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_rtpDump->Stop();
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RtpDump::DestroyRtpDump(_rtpDump);
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_rtpDump = NULL;
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}
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}
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// ============================================================================
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// Decryption
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// ============================================================================
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// ----------------------------------------------------------------------------
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// RegisterExternalDecryption
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// ----------------------------------------------------------------------------
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int ViEReceiver::RegisterExternalDecryption(Encryption* decryption)
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrExternalDecryption)
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{
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return -1;
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}
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_ptrDecryptionBuffer = new WebRtc_UWord8[kViEMaxMtu];
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if (_ptrDecryptionBuffer == NULL)
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{
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return -1;
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}
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_ptrExternalDecryption = decryption;
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return 0;
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}
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// ----------------------------------------------------------------------------
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// DeregisterExternalDecryption
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// ----------------------------------------------------------------------------
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int ViEReceiver::DeregisterExternalDecryption()
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrExternalDecryption == NULL)
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{
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return -1;
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}
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_ptrExternalDecryption = NULL;
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return 0;
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}
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#ifdef WEBRTC_SRTP
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// ----------------------------------------------------------------------------
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// RegisterSRTPModule
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// ----------------------------------------------------------------------------
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int ViEReceiver::RegisterSRTPModule(SrtpModule* srtpModule)
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrSrtp ||
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srtpModule == NULL)
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{
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return -1;
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}
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_ptrSrtpBuffer = new WebRtc_UWord8[kViEMaxMtu];
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if (_ptrSrtpBuffer == NULL)
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{
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return -1;
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}
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_ptrSrtp = srtpModule;
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return 0;
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}
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// ----------------------------------------------------------------------------
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// DeregisterSRTPModule
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// ----------------------------------------------------------------------------
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int ViEReceiver::DeregisterSRTPModule()
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrSrtp == NULL)
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{
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return -1;
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}
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if (_ptrSrtpBuffer)
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{
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delete [] _ptrSrtpBuffer;
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_ptrSrtpBuffer = NULL;
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}
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_ptrSrtp = NULL;
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return 0;
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}
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// ----------------------------------------------------------------------------
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// RegisterSRTCPModule
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// ----------------------------------------------------------------------------
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int ViEReceiver::RegisterSRTCPModule(SrtpModule* srtcpModule)
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrSrtcp ||
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srtcpModule == NULL)
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{
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return -1;
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}
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_ptrSrtcpBuffer = new WebRtc_UWord8[kViEMaxMtu];
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if (_ptrSrtcpBuffer == NULL)
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{
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return -1;
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}
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_ptrSrtcp = srtcpModule;
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return 0;
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}
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// ----------------------------------------------------------------------------
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// DeregisterSRTPCModule
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// ----------------------------------------------------------------------------
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int ViEReceiver::DeregisterSRTCPModule()
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrSrtcp == NULL)
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{
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return -1;
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}
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if (_ptrSrtcpBuffer)
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{
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delete [] _ptrSrtcpBuffer;
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_ptrSrtcpBuffer = NULL;
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}
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_ptrSrtcp = NULL;
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return 0;
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}
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#endif
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// ----------------------------------------------------------------------------
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// IncomingRTPPacket
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//
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// Receives RTP packets from SocketTransport
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// ----------------------------------------------------------------------------
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void ViEReceiver::IncomingRTPPacket(const WebRtc_Word8* incomingRtpPacket,
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const WebRtc_Word32 incomingRtpPacketLength,
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const WebRtc_Word8* fromIP,
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const WebRtc_UWord16 fromPort)
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{
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InsertRTPPacket(incomingRtpPacket, incomingRtpPacketLength);
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return;
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}
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// ----------------------------------------------------------------------------
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// IncomingRTCPPacket
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//
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// Receives RTCP packets from SocketTransport
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// ----------------------------------------------------------------------------
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void ViEReceiver::IncomingRTCPPacket(const WebRtc_Word8* incomingRtcpPacket,
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const WebRtc_Word32 incomingRtcpPacketLength,
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const WebRtc_Word8* fromIP,
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const WebRtc_UWord16 fromPort)
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{
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InsertRTCPPacket(incomingRtcpPacket, incomingRtcpPacketLength);
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return;
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}
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// ----------------------------------------------------------------------------
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// ReceivedRTPPacket
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//
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// Receives RTP packets from external transport
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// ----------------------------------------------------------------------------
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int ViEReceiver::ReceivedRTPPacket(const void* rtpPacket, int rtpPacketLength)
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{
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if (!_receiving)
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{
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return -1;
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}
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return InsertRTPPacket((const WebRtc_Word8*) rtpPacket, rtpPacketLength);
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}
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// ----------------------------------------------------------------------------
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// ReceivedRTCPPacket
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//
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// Receives RTCP packets from external transport
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// ----------------------------------------------------------------------------
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int ViEReceiver::ReceivedRTCPPacket(const void* rtcpPacket,
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int rtcpPacketLength)
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{
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if (!_receiving)
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{
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return -1;
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}
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return InsertRTCPPacket((const WebRtc_Word8*) rtcpPacket, rtcpPacketLength);
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}
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// ----------------------------------------------------------------------------
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// OnReceivedPayloadData
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//
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// From RtpData, callback for data from RTP module
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// ----------------------------------------------------------------------------
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WebRtc_Word32 ViEReceiver::OnReceivedPayloadData(const WebRtc_UWord8* payloadData,
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const WebRtc_UWord16 payloadSize,
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const WebRtcRTPHeader* rtpHeader)
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{
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if (rtpHeader == NULL)
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{
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return 0;
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}
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if (rtpHeader->frameType == webrtc::kFrameEmpty)
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{
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// Don't care about empty rtp packets, we might
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// get this e.g. when using FEC
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return 0;
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}
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if (_vcm.IncomingPacket(payloadData, payloadSize, *rtpHeader) != 0)
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{
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// Check this...
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return -1;
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}
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return 0;
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}
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// ============================================================================
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// Private methods
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// ============================================================================
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// ----------------------------------------------------------------------------
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// InsertRTPPacket
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// ----------------------------------------------------------------------------
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int ViEReceiver::InsertRTPPacket(const WebRtc_Word8* rtpPacket,
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int rtpPacketLength)
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{
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WebRtc_UWord8* receivedPacket = (WebRtc_UWord8*) (rtpPacket);
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int receivedPacketLength = rtpPacketLength;
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrExternalDecryption)
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{
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int decryptedLength = 0;
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_ptrExternalDecryption->decrypt(_channelId, receivedPacket,
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_ptrDecryptionBuffer,
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(int) receivedPacketLength,
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(int*) &decryptedLength);
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if (decryptedLength <= 0)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId,
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_channelId),
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"RTP decryption failed");
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return -1;
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} else if (decryptedLength > kViEMaxMtu)
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{
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WEBRTC_TRACE(webrtc::kTraceCritical, webrtc::kTraceVideo,
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ViEId(_engineId, _channelId),
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" %d bytes is allocated as RTP decrytption output => memory is now corrupted",
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kViEMaxMtu);
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return -1;
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}
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receivedPacket = _ptrDecryptionBuffer;
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receivedPacketLength = decryptedLength;
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}
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#ifdef WEBRTC_SRTP
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if (_ptrSrtp)
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{
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int decryptedLength = 0;
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_ptrSrtp->decrypt(_channelId, receivedPacket, _ptrSrtpBuffer, receivedPacketLength, &decryptedLength);
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if (decryptedLength <= 0)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId, _channelId), "RTP decryption failed");
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return -1;
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}
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else if (decryptedLength > kViEMaxMtu)
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{
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WEBRTC_TRACE(webrtc::kTraceCritical, webrtc::kTraceVideo,ViEId(_engineId, _channelId), " %d bytes is allocated as RTP decrytption output => memory is now corrupted", kViEMaxMtu);
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return -1;
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}
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receivedPacket = _ptrSrtpBuffer;
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receivedPacketLength = decryptedLength;
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}
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#endif
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if (_rtpDump)
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{
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_rtpDump->DumpPacket(receivedPacket,
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(WebRtc_UWord16) receivedPacketLength);
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}
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}
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return _rtpRtcp.IncomingPacket(receivedPacket, receivedPacketLength);
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}
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// ----------------------------------------------------------------------------
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// InsertRTCPPacket
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// ----------------------------------------------------------------------------
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int ViEReceiver::InsertRTCPPacket(const WebRtc_Word8* rtcpPacket,
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int rtcpPacketLength)
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{
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WebRtc_UWord8* receivedPacket = (WebRtc_UWord8*) rtcpPacket;
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int receivedPacketLength = rtcpPacketLength;
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_ptrExternalDecryption)
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{
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int decryptedLength = 0;
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_ptrExternalDecryption->decrypt_rtcp(_channelId, receivedPacket,
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_ptrDecryptionBuffer,
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(int) receivedPacketLength,
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(int*) &decryptedLength);
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if (decryptedLength <= 0)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId,
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_channelId),
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"RTP decryption failed");
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return -1;
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} else if (decryptedLength > kViEMaxMtu)
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{
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WEBRTC_TRACE(
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webrtc::kTraceCritical,
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webrtc::kTraceVideo,
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ViEId(_engineId, _channelId),
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" %d bytes is allocated as RTP decrytption output => memory is now corrupted",
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kViEMaxMtu);
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return -1;
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}
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receivedPacket = _ptrDecryptionBuffer;
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receivedPacketLength = decryptedLength;
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}
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#ifdef WEBRTC_SRTP
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if (_ptrSrtcp)
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{
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int decryptedLength = 0;
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_ptrSrtcp->decrypt_rtcp(_channelId, receivedPacket, _ptrSrtcpBuffer, (int) receivedPacketLength, (int*) &decryptedLength);
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if (decryptedLength <= 0)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId, _channelId), "RTP decryption failed");
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return -1;
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}
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else if (decryptedLength > kViEMaxMtu)
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{
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WEBRTC_TRACE(webrtc::kTraceCritical, webrtc::kTraceVideo, ViEId(_engineId, _channelId), " %d bytes is allocated as RTP decrytption output => memory is now corrupted", kViEMaxMtu);
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return -1;
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}
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receivedPacket = _ptrSrtcpBuffer;
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receivedPacketLength = decryptedLength;
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}
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#endif
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if (_rtpDump)
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{
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_rtpDump->DumpPacket(receivedPacket,
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(WebRtc_UWord16) receivedPacketLength);
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}
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}
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return _rtpRtcp.IncomingPacket(receivedPacket, receivedPacketLength);
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}
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// ----------------------------------------------------------------------------
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// StartReceive
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//
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// Only used for external transport
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// ----------------------------------------------------------------------------
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void ViEReceiver::StartReceive()
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{
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_receiving = true;
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}
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// ----------------------------------------------------------------------------
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// StopReceive
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//
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// Only used for external transport
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// ----------------------------------------------------------------------------
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void ViEReceiver::StopReceive()
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{
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_receiving = false;
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}
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// ----------------------------------------------------------------------------
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// StartRTPDump
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// ----------------------------------------------------------------------------
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int ViEReceiver::StartRTPDump(const char fileNameUTF8[1024])
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_rtpDump)
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{
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// Restart it if it already exists and is started
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_rtpDump->Stop();
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} else
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{
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_rtpDump = RtpDump::CreateRtpDump();
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if (_rtpDump == NULL)
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId,
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_channelId),
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"%s: Failed to create RTP dump", __FUNCTION__);
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return -1;
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}
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}
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if (_rtpDump->Start(fileNameUTF8) != 0)
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{
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RtpDump::DestroyRtpDump(_rtpDump);
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_rtpDump = NULL;
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo,
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ViEId(_engineId, _channelId),
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"%s: Failed to start RTP dump", __FUNCTION__);
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return -1;
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}
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return 0;
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}
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// ----------------------------------------------------------------------------
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// StopRTPDump
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// ----------------------------------------------------------------------------
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int ViEReceiver::StopRTPDump()
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{
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CriticalSectionScoped cs(_receiveCritsect);
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if (_rtpDump)
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{
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if (_rtpDump->IsActive())
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{
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_rtpDump->Stop();
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} else
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo, ViEId(_engineId,
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_channelId),
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"%s: Dump not active", __FUNCTION__);
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}
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RtpDump::DestroyRtpDump(_rtpDump);
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_rtpDump = NULL;
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} else
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{
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideo,
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ViEId(_engineId, _channelId), "%s: RTP dump not started",
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__FUNCTION__);
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return -1;
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}
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return 0;
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}
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// Implements RtpVideoFeedback
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void ViEReceiver::OnReceivedIntraFrameRequest(const WebRtc_Word32 id,
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const WebRtc_UWord8 message)
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{
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// Don't do anything, action trigged on default module
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return;
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}
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void ViEReceiver::OnNetworkChanged(const WebRtc_Word32 id,
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const WebRtc_UWord32 minBitrateBps,
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const WebRtc_UWord32 maxBitrateBps,
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const WebRtc_UWord8 fractionLost,
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const WebRtc_UWord16 roundTripTimeMs,
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const WebRtc_UWord16 bwEstimateKbitMin,
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const WebRtc_UWord16 bwEstimateKbitMax)
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{
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// Called for default module
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return;
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}
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} // namespace webrtc
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