新增若干音视频编码类型的默认实现

部分支持VP8/VP9/AV1/JPEG/MP3/H266/ADPCM/SVAC/G722/G723/G729

ext-codec/AAC.cpp

@@ -373,10 +373,6 @@ Track::Ptr AACTrack::clone() const {
 }
 
 Sdp::Ptr AACTrack::getSdp(uint8_t payload_type) const {
-    if (!ready()) {
-        WarnL << getCodecName() << " Track未准备好";
-        return nullptr;
-    }
     return std::make_shared<AACSdp>(getExtraData()->toString(), payload_type, getAudioSampleRate(), getAudioChannel(), getBitRate() >> 10);
 }