/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "webrtc/modules/rtp_rtcp/test/BWEStandAlone/TestSenderReceiver.h"

#include <stdio.h>
#include <stdlib.h>

#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp.h"
#include "webrtc/modules/rtp_rtcp/test/BWEStandAlone/TestLoadGenerator.h"
#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
#include "webrtc/system_wrappers/include/event_wrapper.h"
#include "webrtc/system_wrappers/include/tick_util.h"
#include "webrtc/test/channel_transport/udp_transport.h"

#define NR_OF_SOCKET_BUFFERS 500


bool ProcThreadFunction(void *obj)
{
    if (obj == NULL)
    {
        return false;
    }
    TestSenderReceiver *theObj = static_cast<TestSenderReceiver *>(obj);

    return theObj->ProcLoop();
}


TestSenderReceiver::TestSenderReceiver (void)
:
_critSect(CriticalSectionWrapper::CreateCriticalSection()),
_eventPtr(NULL),
_running(false),
_payloadType(0),
_loadGenerator(NULL),
_isSender(false),
_isReceiver(false),
_sendRecCB(NULL),
_lastBytesReceived(0),
_lastTime(-1)
{
    // RTP/RTCP module
    _rtp = RtpRtcp::CreateRtpRtcp(0, false);
    if (!_rtp)
    {
        throw "Could not create RTP/RTCP module";
        exit(1);
    }

    if (_rtp->InitReceiver() != 0)
    {
        throw "_rtp->InitReceiver()";
        exit(1);
    }

    if (_rtp->InitSender() != 0)
    {
        throw "_rtp->InitSender()";
        exit(1);
    }

    // SocketTransport module
    uint8_t numberOfThreads = 1;
    _transport = UdpTransport::Create(0, numberOfThreads);
    if (!_transport)
    {
        throw "Could not create transport module";
        exit(1);
    }
}

TestSenderReceiver::~TestSenderReceiver (void)
{

    Stop(); // N.B. without critSect

    _critSect->Enter();

    if (_rtp)
    {
        RtpRtcp::DestroyRtpRtcp(_rtp);
        _rtp = NULL;
    }

    if (_transport)
    {
        UdpTransport::Destroy(_transport);
        _transport = NULL;
    }

    delete _critSect;

}


int32_t TestSenderReceiver::InitReceiver (const uint16_t rtpPort,
                                          const uint16_t rtcpPort,
                                          const int8_t payloadType /*= 127*/)
{
    CriticalSectionScoped cs(_critSect);

    // init transport
    if (_transport->InitializeReceiveSockets(this, rtpPort/*, 0, NULL, 0, true*/) != 0)
    {
        throw "_transport->InitializeReceiveSockets";
        exit(1);
    }

    if (_rtp->RegisterIncomingRTPCallback(this) != 0)
    {
        throw "_rtp->RegisterIncomingRTPCallback";
        exit(1);
    }

    if (_rtp->RegisterIncomingDataCallback(this) != 0)
    {
        throw "_rtp->RegisterIncomingRTPCallback";
        exit(1);
    }

    if (_rtp->SetRTCPStatus(RtcpMode::kReducedSize) != 0) {
        throw "_rtp->SetRTCPStatus";
        exit(1);
    }

    if (_rtp->SetTMMBRStatus(true) != 0)
    {
        throw "_rtp->SetTMMBRStatus";
        exit(1);
    }

    if (_rtp->RegisterReceivePayload("I420", payloadType, 90000) != 0)
    {
        throw "_rtp->RegisterReceivePayload";
        exit(1);
    }

    _isReceiver = true;

    return (0);
}


int32_t TestSenderReceiver::Start()
{
    CriticalSectionScoped cs(_critSect);

    _eventPtr = EventWrapper::Create();

    if (_rtp->SetSendingStatus(true) != 0)
    {
        throw "_rtp->SetSendingStatus";
        exit(1);
    }

    _procThread = PlatformThread::CreateThread(ProcThreadFunction, this,
                                               "TestSenderReceiver");

    _running = true;

    if (_isReceiver)
    {
        if (_transport->StartReceiving(NR_OF_SOCKET_BUFFERS) != 0)
        {
            throw "_transport->StartReceiving";
            exit(1);
        }
    }

    _procThread->Start();
    _procThread->SetPriority(kRealtimePriority);

    return 0;

}


int32_t TestSenderReceiver::Stop ()
{
    CriticalSectionScoped cs(_critSect);

    _transport->StopReceiving();

    if (_procThread)
    {
        _running = false;
        _eventPtr->Set();

        _procThread->Stop();
        _procThread.reset();

        delete _eventPtr;
    }

    return (0);
}


bool TestSenderReceiver::ProcLoop(void)
{

    // process RTP/RTCP module
    _rtp->Process();

    // process SocketTransport module
    _transport->Process();

    // no critSect
    while (_running)
    {
        // ask RTP/RTCP module for wait time
        int32_t rtpWait = _rtp->TimeUntilNextProcess();

        // ask SocketTransport module for wait time
        int32_t tpWait = _transport->TimeUntilNextProcess();

        int32_t minWait = (rtpWait < tpWait) ? rtpWait: tpWait;
        minWait = (minWait > 0) ? minWait : 0;
        // wait
        _eventPtr->Wait(minWait);

        // process RTP/RTCP module
        _rtp->Process();

        // process SocketTransport module
        _transport->Process();

    }

    return true;
}


int32_t TestSenderReceiver::ReceiveBitrateKbps ()
{
    size_t bytesSent;
    uint32_t packetsSent;
    size_t bytesReceived;
    uint32_t packetsReceived;

    if (_rtp->DataCountersRTP(&bytesSent, &packetsSent, &bytesReceived, &packetsReceived) == 0)
    {
        int64_t now = TickTime::MillisecondTimestamp();
        int32_t kbps = 0;
        if (now > _lastTime)
        {
            if (_lastTime > 0)
            {
                // 8 * bytes / ms = kbps
                kbps = static_cast<int32_t>(
                    (8 * (bytesReceived - _lastBytesReceived)) / (now - _lastTime));
            }
            _lastTime = now;
            _lastBytesReceived = bytesReceived;
        }
        return (kbps);
    }

    return (-1);
}


int32_t TestSenderReceiver::SetPacketTimeout(const uint32_t timeoutMS)
{
    return (_rtp->SetPacketTimeout(timeoutMS, 0 /* RTCP timeout */));
}


int32_t TestSenderReceiver::OnReceivedPayloadData(const uint8_t* payloadData,
                                                  const size_t payloadSize,
                                                  const webrtc::WebRtcRTPHeader* rtpHeader)
{
    //printf("OnReceivedPayloadData\n");
    return (0);
}


void TestSenderReceiver::IncomingRTPPacket(const int8_t* incomingRtpPacket,
                                           const size_t rtpPacketLength,
                                           const int8_t* fromIP,
                                           const uint16_t fromPort)
{
    _rtp->IncomingPacket((uint8_t *) incomingRtpPacket, rtpPacketLength);
}


void TestSenderReceiver::IncomingRTCPPacket(const int8_t* incomingRtcpPacket,
                                            const size_t rtcpPacketLength,
                                            const int8_t* fromIP,
                                            const uint16_t fromPort)
{
    _rtp->IncomingPacket((uint8_t *) incomingRtcpPacket, rtcpPacketLength);
}


///////////////////


int32_t TestSenderReceiver::InitSender (const uint32_t startBitrateKbps,
                                        const int8_t* ipAddr,
                                        const uint16_t rtpPort,
                                        const uint16_t rtcpPort /*= 0*/,
                                        const int8_t payloadType /*= 127*/)
{
    CriticalSectionScoped cs(_critSect);

    _payloadType = payloadType;

    // check load generator valid
    if (_loadGenerator)
    {
        _loadGenerator->SetBitrate(startBitrateKbps);
    }

    if (_rtp->RegisterSendTransport(_transport) != 0)
    {
        throw "_rtp->RegisterSendTransport";
        exit(1);
    }
    if (_rtp->RegisterSendPayload("I420", _payloadType, 90000) != 0)
    {
        throw "_rtp->RegisterSendPayload";
        exit(1);
    }

    if (_rtp->RegisterIncomingVideoCallback(this) != 0)
    {
        throw "_rtp->RegisterIncomingVideoCallback";
        exit(1);
    }

    if (_rtp->SetRTCPStatus(RtcpMode::kReducedSize) != 0) {
        throw "_rtp->SetRTCPStatus";
        exit(1);
    }

    if (_rtp->SetSendBitrate(startBitrateKbps*1000, 0, MAX_BITRATE_KBPS) != 0)
    {
        throw "_rtp->SetSendBitrate";
        exit(1);
    }


    // SocketTransport
    if (_transport->InitializeSendSockets(ipAddr, rtpPort, rtcpPort))
    {
        throw "_transport->InitializeSendSockets";
        exit(1);
    }

    _isSender = true;

    return (0);
}


int32_t
TestSenderReceiver::SendOutgoingData(const uint32_t timeStamp,
                                     const uint8_t* payloadData,
                                     const size_t payloadSize,
                                     const webrtc::FrameType frameType /*= webrtc::kVideoFrameDelta*/)
{
    return (_rtp->SendOutgoingData(frameType, _payloadType, timeStamp, payloadData, payloadSize));
}


int32_t TestSenderReceiver::SetLoadGenerator(TestLoadGenerator *generator)
{
    CriticalSectionScoped cs(_critSect);

    _loadGenerator = generator;
    return(0);

}

void TestSenderReceiver::OnNetworkChanged(const int32_t id,
                                  const uint32_t minBitrateBps,
                                  const uint32_t maxBitrateBps,
                                  const uint8_t fractionLost,
                                  const uint16_t roundTripTimeMs,
                                  const uint16_t bwEstimateKbitMin,
                                  const uint16_t bwEstimateKbitMax)
{
    if (_loadGenerator)
    {
        _loadGenerator->SetBitrate(maxBitrateBps/1000);
    }

    if (_sendRecCB)
    {
        _sendRecCB->OnOnNetworkChanged(maxBitrateBps,
            fractionLost,
            roundTripTimeMs,
            bwEstimateKbitMin,
            bwEstimateKbitMax);
    }
}