添加对g711A/U rtsp支持相关文件，api添加windows静态库编译选项，g711 RTMP支持尚未修改

src/Extension/G711Rtmp.h

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
+ *
+ * This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
+ *
+ * Use of this source code is governed by MIT license that can be found in the
+ * LICENSE file in the root of the source tree. All contributing project authors
+ * may be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef ZLMEDIAKIT_G711RTMPCODEC_H
+#define ZLMEDIAKIT_G711RTMPCODEC_H
+
+#include "Rtmp/RtmpCodec.h"
+#include "Extension/Track.h"
+#include "Extension/G711.h"
+
+namespace mediakit{
+/**
+ * G711 Rtmp转adts类
+ */
+class G711RtmpDecoder : public RtmpCodec , public ResourcePoolHelper<G711Frame> {
+public:
+    typedef std::shared_ptr<G711RtmpDecoder> Ptr;
+
+    G711RtmpDecoder();
+    ~G711RtmpDecoder() {}
+
+    /**
+     * 输入Rtmp并解码
+     * @param Rtmp Rtmp数据包
+     * @param key_pos 此参数内部强制转换为false,请忽略之
+     */
+    bool inputRtmp(const RtmpPacket::Ptr &Rtmp, bool key_pos = false) override;
+
+    TrackType getTrackType() const override{
+        return TrackAudio;
+    }
+
+    void setCodecId(CodecId codecId)
+    {
+        _codecid = codecId;
+    }
+
+    CodecId getCodecId() const override{
+        return _codecid;
+    }
+
+protected:
+    void onGetG711(const char* pcData, int iLen, uint32_t ui32TimeStamp);
+    G711Frame::Ptr obtainFrame();
+protected:
+    G711Frame::Ptr _adts;
+    CodecId _codecid = CodecG711A;
+
+};
+
+
+/**
+ * aac adts转Rtmp类
+ */
+class G711RtmpEncoder : public G711RtmpDecoder ,  public ResourcePoolHelper<RtmpPacket> {
+public:
+    typedef std::shared_ptr<G711RtmpEncoder> Ptr;
+
+    /**
+     * 构造函数，track可以为空，此时则在inputFrame时输入adts头
+     * 如果track不为空且包含adts头相关信息，
+     * 那么inputFrame时可以不输入adts头
+     * @param track
+     */
+    G711RtmpEncoder(const Track::Ptr &track);
+    ~G711RtmpEncoder() {}
+
+    /**
+     * 输入aac 数据，可以不带adts头
+     * @param frame aac数据
+     */
+    void inputFrame(const Frame::Ptr &frame) override;
+private:
+    G711Track::Ptr _track;
+};
+
+}//namespace mediakit
+
+#endif //ZLMEDIAKIT_G711RTMPCODEC_H