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/G711Rtp.h

@@ -0,0 +1,84 @@
+/*
+ * 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_G711RTPCODEC_H
+#define ZLMEDIAKIT_G711RTPCODEC_H
+
+#include "Rtsp/RtpCodec.h"
+#include "Extension/G711.h"
+namespace mediakit{
+/**
+ * G711 rtp转adts类
+ */
+class G711RtpDecoder : public RtpCodec , public ResourcePoolHelper<G711Frame> {
+public:
+    typedef std::shared_ptr<G711RtpDecoder> Ptr;
+
+    G711RtpDecoder(const Track::Ptr &track);
+    ~G711RtpDecoder() {}
+
+    /**
+     * 输入rtp并解码
+     * @param rtp rtp数据包
+     * @param key_pos 此参数内部强制转换为false,请忽略之
+     */
+    bool inputRtp(const RtpPacket::Ptr &rtp, bool key_pos = false) override;
+
+    TrackType getTrackType() const override{
+        return TrackAudio;
+    }
+    CodecId getCodecId() const override{
+        return _codecid;
+    }
+protected:
+    G711RtpDecoder();
+private:
+    void onGetG711(const G711Frame::Ptr &frame);
+    G711Frame::Ptr obtainFrame();
+private:
+    G711Frame::Ptr _adts;
+    CodecId _codecid = CodecG711A;
+};
+
+
+/**
+ * g711 转rtp类
+ */
+class G711RtpEncoder : public G711RtpDecoder , public RtpInfo {
+public:
+    typedef std::shared_ptr<G711RtpEncoder> Ptr;
+
+    /**
+     * @param ui32Ssrc ssrc
+     * @param ui32MtuSize mtu 大小
+     * @param ui32SampleRate 采样率
+     * @param ui8PlayloadType pt类型
+     * @param ui8Interleaved rtsp interleaved 值
+     */
+    G711RtpEncoder(uint32_t ui32Ssrc,
+                  uint32_t ui32MtuSize,
+                  uint32_t ui32SampleRate,
+                  uint8_t ui8PlayloadType = 0,
+                  uint8_t ui8Interleaved = TrackAudio * 2);
+    ~G711RtpEncoder() {}
+
+    /**
+     * @param frame g711数据
+     */
+    void inputFrame(const Frame::Ptr &frame) override;
+private:
+    void makeG711Rtp(const void *pData, unsigned int uiLen, bool bMark, uint32_t uiStamp);
+private:
+    unsigned char _aucSectionBuf[1600];
+};
+
+}//namespace mediakit
+
+#endif //ZLMEDIAKIT_G711RTPCODEC_H