mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-27 05:38:31 +08:00
67 lines
1.8 KiB
C++
67 lines
1.8 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/xia-chu/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 "G711.h"
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namespace mediakit{
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/**
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* G711类型SDP
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*/
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class G711Sdp : public Sdp {
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public:
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/**
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* G711采样率固定为8000
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* @param codecId G711A G711U
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* @param sample_rate 音频采样率
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* @param payload_type rtp payload
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* @param bitrate 比特率
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*/
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G711Sdp(CodecId codecId,
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int sample_rate,
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int channels,
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int bitrate = 128,
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int payload_type = 98) : Sdp(sample_rate,payload_type), _codecId(codecId){
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_printer << "m=audio 0 RTP/AVP " << payload_type << "\r\n";
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if (bitrate) {
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_printer << "b=AS:" << bitrate << "\r\n";
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}
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_printer << "a=rtpmap:" << payload_type << " " << getCodecName() << "/" << sample_rate << "/" << channels << "\r\n";
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_printer << "a=control:trackID=" << (int)TrackAudio << "\r\n";
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}
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string getSdp() const override {
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return _printer;
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}
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CodecId getCodecId() const override {
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return _codecId;
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}
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private:
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_StrPrinter _printer;
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CodecId _codecId;
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};
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Track::Ptr G711Track::clone() {
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return std::make_shared<std::remove_reference<decltype(*this)>::type>(*this);
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}
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Sdp::Ptr G711Track::getSdp() {
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if(!ready()){
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WarnL << getCodecName() << " Track未准备好";
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return nullptr;
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}
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return std::make_shared<G711Sdp>(getCodecId(), getAudioSampleRate(), getAudioChannel(), getBitRate() / 1024);
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}
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}//namespace mediakit
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