mirror of
https://gitee.com/xia-chu/ZLMediaKit.git
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93 lines
3.0 KiB
C++
93 lines
3.0 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#include "G711Rtp.h"
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namespace mediakit{
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G711RtpDecoder::G711RtpDecoder(CodecId codecid){
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_codecid = codecid;
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_frame = obtainFrame();
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}
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G711Frame::Ptr G711RtpDecoder::obtainFrame() {
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//从缓存池重新申请对象，防止覆盖已经写入环形缓存的对象
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auto frame = ResourcePoolHelper<G711Frame>::obtainObj();
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frame->_buffer.clear();
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frame->_codecid = _codecid;
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frame->_dts = 0;
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return frame;
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}
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bool G711RtpDecoder::inputRtp(const RtpPacket::Ptr &rtppack, bool) {
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// 获取rtp数据长度
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int length = rtppack->size() - rtppack->offset;
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// 获取rtp数据
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const char *rtp_packet_buf = rtppack->data() + rtppack->offset;
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if (rtppack->timeStamp != _frame->_dts) {
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//时间戳变更，清空上一帧
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onGetG711(_frame);
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}
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//追加数据
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_frame->_buffer.append(rtp_packet_buf, length);
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//赋值时间戳
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_frame->_dts = rtppack->timeStamp;
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if (rtppack->mark || _frame->_buffer.size() > 10 * 1024) {
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//标记为mark时，或者内存快溢出时，我们认为这是该帧最后一个包
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onGetG711(_frame);
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}
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return false;
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}
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void G711RtpDecoder::onGetG711(const G711Frame::Ptr &frame) {
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if(!frame->_buffer.empty()){
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//写入环形缓存
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RtpCodec::inputFrame(frame);
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_frame = obtainFrame();
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}
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}
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/////////////////////////////////////////////////////////////////////////////////////
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G711RtpEncoder::G711RtpEncoder(CodecId codecid, uint32_t ui32Ssrc, uint32_t ui32MtuSize,
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uint32_t ui32SampleRate, uint8_t ui8PayloadType, uint8_t ui8Interleaved) :
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G711RtpDecoder(codecid),
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RtpInfo(ui32Ssrc, ui32MtuSize, ui32SampleRate, ui8PayloadType, ui8Interleaved) {
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}
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void G711RtpEncoder::inputFrame(const Frame::Ptr &frame) {
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GET_CONFIG(uint32_t, cycleMS, Rtp::kCycleMS);
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auto uiStamp = frame->dts();
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auto pcData = frame->data() + frame->prefixSize();
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auto iLen = frame->size() - frame->prefixSize();
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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 <= _ui32MtuSize - 20) {
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makeG711Rtp(ptr, iSize, true, uiStamp);
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break;
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}
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makeG711Rtp(ptr, _ui32MtuSize - 20, false, uiStamp);
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ptr += (_ui32MtuSize - 20);
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iSize -= (_ui32MtuSize - 20);
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}
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}
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void G711RtpEncoder::makeG711Rtp(const void *data, unsigned int len, bool mark, uint32_t uiStamp) {
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RtpCodec::inputRtp(makeRtp(getTrackType(), data, len, mark, uiStamp), false);
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}
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}//namespace mediakit
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