2017-04-01 16:35:56 +08:00
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/*
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* RtpMakerAAC.cpp
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*
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* Created on: 2016年8月12日
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* Author: xzl
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*/
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2017-05-02 17:15:12 +08:00
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#include "Common/config.h"
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2017-04-25 11:35:41 +08:00
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#include "RtpMakerAAC.h"
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#include "Util/mini.h"
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2017-04-01 16:35:56 +08:00
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using namespace ZL::Util;
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namespace ZL {
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namespace Rtsp {
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void RtpMaker_AAC::makeRtp(const char *pcData, int iLen, uint32_t uiStamp) {
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static uint32_t cycleMS = mINI::Instance()[Config::Rtp::kCycleMS].as<uint32_t>();
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uiStamp %= cycleMS;
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char *ptr = (char *) pcData;
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int iSize = iLen;
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while (iSize > 0 ) {
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if (iSize <= m_iMtuSize - 20) {
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m_aucSectionBuf[0] = 0;
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m_aucSectionBuf[1] = 16;
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m_aucSectionBuf[2] = iLen >> 5;
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m_aucSectionBuf[3] = (iLen & 0x1F) << 3;
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memcpy(m_aucSectionBuf + 4, ptr, iSize);
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makeAACRtp(m_aucSectionBuf, iSize + 4, true, uiStamp);
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break;
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}
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m_aucSectionBuf[0] = 0;
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m_aucSectionBuf[1] = 16;
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m_aucSectionBuf[2] = (iLen) >> 5;
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m_aucSectionBuf[3] = (iLen & 0x1F) << 3;
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memcpy(m_aucSectionBuf + 4, ptr, m_iMtuSize - 20);
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makeAACRtp(m_aucSectionBuf, m_iMtuSize - 16, false, uiStamp);
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ptr += (m_iMtuSize - 20);
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iSize -= (m_iMtuSize - 20);
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}
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}
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inline void RtpMaker_AAC::makeAACRtp(const void *pData, unsigned int uiLen, bool bMark, uint32_t uiStamp) {
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uint16_t u16RtpLen = uiLen + 12;
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m_ui32TimeStamp = (m_ui32SampleRate / 1000) * uiStamp;
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uint32_t ts = htonl(m_ui32TimeStamp);
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uint16_t sq = htons(m_ui16Sequence);
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uint32_t sc = htonl(m_ui32Ssrc);
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auto pRtppkt = obtainPkt();
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auto &rtppkt = *(pRtppkt.get());
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unsigned char *pucRtp = rtppkt.payload;
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pucRtp[0] = '$';
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pucRtp[1] = m_ui8Interleaved;
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pucRtp[2] = u16RtpLen >> 8;
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pucRtp[3] = u16RtpLen & 0x00FF;
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pucRtp[4] = 0x80;
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pucRtp[5] = (bMark << 7) | m_ui8PlayloadType;
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memcpy(&pucRtp[6], &sq, 2);
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memcpy(&pucRtp[8], &ts, 4);
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//ssrc
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memcpy(&pucRtp[12], &sc, 4);
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memcpy(&pucRtp[16], pData, uiLen);
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rtppkt.PT = m_ui8PlayloadType;
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rtppkt.interleaved = m_ui8Interleaved;
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rtppkt.mark = bMark;
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rtppkt.length = uiLen + 16;
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rtppkt.sequence = m_ui16Sequence;
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rtppkt.timeStamp = m_ui32TimeStamp;
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rtppkt.ssrc = m_ui32Ssrc;
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rtppkt.type = TrackAudio;
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memcpy(rtppkt.payload + 16, pData, uiLen);
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onMakeRtp(pRtppkt, false);
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m_ui16Sequence++;
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}
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} /* namespace RTP */
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} /* namespace ZL */
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