ghy

Alejandro Acuña

2025-03-12 26319e4c5bfbee722c15b8e7ccca9b6127bb1cb8

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// GenericRTP2PCMDecoder.cpp: implementation of the GenericRTP2PCMDecoder class.
//
//////////////////////////////////////////////////////////////////////
 
#include "GenericRTP2PCMDecoder.h"
#include "RTPPacket.h"
#include "AudioSample.h"
#include "AudioSampleManager.h"
 
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
 
GenericRTP2PCMDecoder::GenericRTP2PCMDecoder()
{
    char subFacilityName[100];
    sprintf(subFacilityName, "GenericRTP2PCMDecoder:%x", this);
    tracer.SetSubFacilityName(subFacilityName);
    SetTraceLevel();
    lastCodec = -1;
    SetCodecInRegistry("");
}
 
GenericRTP2PCMDecoder::~GenericRTP2PCMDecoder()
{
 
}
 
int
GenericRTP2PCMDecoder::SetTraceLevel()
{
    long SystemMask = 0;
    if ((SystemMask = GetRegKeyLong(HKEY_CURRENT_USER, "Software\\Cisco Systems\\MTC\\Tracing", "AllComponents", 0x0)) == 0)
    {
        SystemMask = GetRegKeyLong(HKEY_CURRENT_USER, "Software\\Cisco Systems\\MTC\\Tracing", "GenericRTP2PCMDecoder", 0x100000);
    }
    tracer.SetSystemMask(SystemMask);
    return 0;
}
 
int
GenericRTP2PCMDecoder::SetCodecInRegistry(char *codecName)
{
    SetRegKeyString(HKEY_CURRENT_USER, "Software\\Cisco Systems\\CCNMediaTerm\\1.0", "RTPReceiveCodec", codecName);
    return 0;
}
 
int
GenericRTP2PCMDecoder::TransformStarted()
{
    return 0;
}
 
int
GenericRTP2PCMDecoder::TransformStopped()
{
    SetCodecInRegistry("");
    lastCodec = -1;
    return 0;
}
 
int
GenericRTP2PCMDecoder::TransformAudioSamples(std::vector<std::pair<AudioSample *, AudioSource *> > &data, AudioSample **ppAudioSample)
{
    int result = 0;
    AudioSample *outSample = NULL;
    AudioSample *inSample = NULL;
    if (data.size() > 0)
    {
        inSample = data[0].first;
    }
 
    if (inSample)
    {
        result = AudioSampleManager::GetInstance()->GetAudioSample(&outSample, this);
 
        if (outSample)
        {
            *ppAudioSample = outSample;
            outSample->SetFormat(WaveFormat::GetWaveFormat(WaveFormat_PCM_16_8_1));
            
            RTPPacket *rtpHeader = inSample->RTPHeader();
            if (rtpHeader)
            {
                outSample->SetRTPHeader(rtpHeader->CloneHeader());
                if (inSample->DataSize() <= 0)
                {
                    outSample->SetSilenceDuration(inSample->GetSilenceDuration());
                }
                else
                {
                    int outputSize = outSample->BufferSize();
                    int inputSize = inSample->DataSize();
                    bool writeCodec = false;
                    if (lastCodec != rtpHeader->PayloadType() &&
                        rtpHeader->PayloadType() != RTP_PAYLOADTYPE_SID)
                    {
                        writeCodec = true;
                        lastCodec = rtpHeader->PayloadType();
                    }
 
                    switch (rtpHeader->PayloadType())
                    {
                    case RTP_PAYLOADTYPE_G711_ULAW:
                        tracer.tracef(DET, "TransformAudioSamples : %d byte G.711 ULAW packet\n", inputSize);
                        g711Codec.SetULaw();
                        result = g711Codec.Decode(inSample->Data(), inputSize, outSample->Data(), &outputSize);
                        if (writeCodec) SetCodecInRegistry("G.711 ULaw");
                        break;
                    case RTP_PAYLOADTYPE_G711_ALAW:
                        tracer.tracef(DET, "TransformAudioSamples : %d byte G.711 ALAW packet\n", inputSize);
                        g711Codec.SetALaw();
                        result = g711Codec.Decode(inSample->Data(), inputSize, outSample->Data(), &outputSize);
                        if (writeCodec) SetCodecInRegistry("G.711 ALaw");
                        break;
                    case RTP_PAYLOADTYPE_SID:
                        tracer.tracef(DET, "TransformAudioSamples : %d byte SID packet\n", inputSize);
                        result = 0;
                        outputSize = 4;
                        memcpy(outSample->Data(), inSample->Data(), 4);
                        break;
                    default:
                        result = -10;
                        char codecName[100];
                        sprintf(codecName, "Unknown Type %u (ERROR)", rtpHeader->PayloadType());
                        if (writeCodec) SetCodecInRegistry(codecName);
                    }
 
                    outSample->SetDataSize(outputSize);
                }
            }
            else
            {
                result = -20;
            }
        }
        else
        {
            result = -30;
        }
    }
    *ppAudioSample = outSample;
    return result;
}