AAC sdp添加通道数

src/Extension/AAC.cpp

@@ -103,7 +103,7 @@ Sdp::Ptr AACTrack::getSdp() {
         WarnL << getCodecName() << " Track未准备好";
         return nullptr;
     }
-    return std::make_shared<AACSdp>(getAacCfg(),getAudioSampleRate());
+    return std::make_shared<AACSdp>(getAacCfg(),getAudioSampleRate(), getAudioChannel());
 }
 
 }//namespace mediakit

src/Extension/AAC.h

@@ -276,11 +276,12 @@ public:
      */
     AACSdp(const string &aac_cfg,
            int sample_rate,
+           int channels,
            int playload_type = 98,
            int bitrate = 128) : Sdp(sample_rate,playload_type){
         _printer << "m=audio 0 RTP/AVP " << playload_type << "\r\n";
         _printer << "b=AS:" << bitrate << "\r\n";
-        _printer << "a=rtpmap:" << playload_type << " MPEG4-GENERIC/" << sample_rate << "\r\n";
+        _printer << "a=rtpmap:" << playload_type << " MPEG4-GENERIC/" << sample_rate << "/" << channels << "\r\n";
 
         char configStr[32] = {0};
         snprintf(configStr, sizeof(configStr), "%02X%02X", (uint8_t)aac_cfg[0], (uint8_t)aac_cfg[1]);