优化rtmp推流时，aac config获取不完整的bug

src/Extension/AAC.h

@@ -71,10 +71,17 @@ public:
 
     /**
      * 构造aac类型的媒体
-     * @param aac_cfg aac两个字节的配置信息
+     * @param aac_cfg aac配置信息
      */
     AACTrack(const string &aac_cfg){
-        if(aac_cfg.size() < 2){
+        setAacCfg(aac_cfg);
+    }
+
+    /**
+     * 设置aac 配置信息
+     */
+    void setAacCfg(const string &aac_cfg){
+        if (aac_cfg.size() < 2) {
             throw std::invalid_argument("adts配置必须最少2个字节");
         }
         _cfg = aac_cfg;
@@ -82,7 +89,7 @@ public:
     }
 
     /**
-     * 获取aac两个字节的配置
+     * 获取aac 配置信息
      */
     const string &getAacCfg() const{
         return _cfg;

src/Extension/AACRtmp.cpp

@@ -13,8 +13,9 @@
 
 namespace mediakit{
 
-AACRtmpDecoder::AACRtmpDecoder() {
-    _adts = obtainFrame();
+AACRtmpDecoder::AACRtmpDecoder(const Track::Ptr &track) {
+    _frame = obtainFrame();
+    _track = dynamic_pointer_cast<AACTrack>(track);
 }
 
 AACFrame::Ptr AACRtmpDecoder::obtainFrame() {
@@ -38,13 +39,19 @@ static string getAacCfg(const RtmpPacket &thiz) {
         WarnL << "bad aac cfg!";
         return ret;
     }
-    ret = thiz.strBuf.substr(2, 2);
+    ret = thiz.strBuf.substr(2);
     return ret;
 }
 
 bool AACRtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt, bool) {
     if (pkt->isCfgFrame()) {
         _aac_cfg = getAacCfg(*pkt);
+        if (_track) {
+            //设置aac config
+            _track->setAacCfg(_aac_cfg);
+            //不再强引用
+            _track = nullptr;
+        }
         return false;
     }
     if (!_aac_cfg.empty()) {
@@ -54,20 +61,20 @@ bool AACRtmpDecoder::inputRtmp(const RtmpPacket::Ptr &pkt, bool) {
 }
 
 void AACRtmpDecoder::onGetAAC(const char* data, int len, uint32_t stamp) {
-    _adts->_dts = stamp;
+    _frame->_dts = stamp;
     //先追加数据
-    _adts->_buffer.append(data, len);
+    _frame->_buffer.append(data, len);
     //覆盖adts头
-    dumpAacConfig(_aac_cfg, _adts->size(), (uint8_t *) _adts->data());
+    dumpAacConfig(_aac_cfg, _frame->size(), (uint8_t *) _frame->data());
 
     //写入环形缓存
-    RtmpCodec::inputFrame(_adts);
-    _adts = obtainFrame();
+    RtmpCodec::inputFrame(_frame);
+    _frame = obtainFrame();
 }
 
 /////////////////////////////////////////////////////////////////////////////////////
 
-AACRtmpEncoder::AACRtmpEncoder(const Track::Ptr &track) {
+AACRtmpEncoder::AACRtmpEncoder(const Track::Ptr &track): AACRtmpDecoder(track) {
     _track = dynamic_pointer_cast<AACTrack>(track);
 }
 

src/Extension/AACRtmp.h

@@ -23,7 +23,7 @@ class AACRtmpDecoder : public RtmpCodec , public ResourcePoolHelper<AACFrame> {
 public:
     typedef std::shared_ptr<AACRtmpDecoder> Ptr;
 
-    AACRtmpDecoder();
+    AACRtmpDecoder(const Track::Ptr &track);
     ~AACRtmpDecoder() {}
 
     /**
@@ -38,10 +38,12 @@ public:
     }
 
 protected:
-    void onGetAAC(const char* data, int len, uint32_t stamp);
+    void onGetAAC(const char *data, int len, uint32_t stamp);
     AACFrame::Ptr obtainFrame();
+
 protected:
-    AACFrame::Ptr _adts;
+    AACFrame::Ptr _frame;
+    AACTrack::Ptr _track;
     string _aac_cfg;
 };
 
@@ -72,11 +74,12 @@ public:
      * 生成config包
      */
     void makeConfigPacket() override;
+
 private:
     void makeAudioConfigPkt();
+
 private:
     uint8_t _audio_flv_flags;
-    AACTrack::Ptr _track;
 };
 
 }//namespace mediakit