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.cpp

@@ -0,0 +1,101 @@
+/*
+ * 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.
+ */
+
+#include "G711Rtp.h"
+
+namespace mediakit{
+
+G711RtpEncoder::G711RtpEncoder(uint32_t ui32Ssrc,
+                             uint32_t ui32MtuSize,
+                             uint32_t ui32SampleRate,
+                             uint8_t ui8PlayloadType,
+                             uint8_t ui8Interleaved) :
+        RtpInfo(ui32Ssrc,
+                ui32MtuSize,
+                ui32SampleRate,
+                ui8PlayloadType,
+                ui8Interleaved){
+}
+
+void G711RtpEncoder::inputFrame(const Frame::Ptr &frame) {
+    GET_CONFIG(uint32_t, cycleMS, Rtp::kCycleMS);
+    auto uiStamp = frame->dts();
+    auto pcData = frame->data() + frame->prefixSize();
+    auto iLen = frame->size() - frame->prefixSize();
+
+    uiStamp %= cycleMS;
+    char *ptr = (char *) pcData;
+    int iSize = iLen;
+    while (iSize > 0) {
+        if (iSize <= _ui32MtuSize - 20) {
+            makeG711Rtp(ptr, iSize, true, uiStamp);
+            break;
+        }
+        makeG711Rtp(ptr, _ui32MtuSize - 20, false, uiStamp);
+        ptr += (_ui32MtuSize - 20);
+        iSize -= (_ui32MtuSize - 20);
+    }
+}
+
+void G711RtpEncoder::makeG711Rtp(const void *data, unsigned int len, bool mark, uint32_t uiStamp) {
+    RtpCodec::inputRtp(makeRtp(getTrackType(),data,len,mark,uiStamp), false);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+
+G711RtpDecoder::G711RtpDecoder(const Track::Ptr &track){
+    auto aacTrack = dynamic_pointer_cast<G711Track>(track);
+    _codecid = aacTrack->getCodecId();
+    if(!aacTrack || !aacTrack->ready()){
+        WarnL << "该g711 track无效!";
+    }else{
+        //_aac_cfg = aacTrack->getAacCfg();
+    }
+    _adts = obtainFrame();
+}
+G711RtpDecoder::G711RtpDecoder() {
+    _adts = obtainFrame();
+}
+
+G711Frame::Ptr G711RtpDecoder::obtainFrame() {
+    //从缓存池重新申请对象，防止覆盖已经写入环形缓存的对象
+    auto frame = ResourcePoolHelper<G711Frame>::obtainObj();
+    frame->frameLength = 0;
+    frame->iPrefixSize = 0;
+    return frame;
+}
+
+bool G711RtpDecoder::inputRtp(const RtpPacket::Ptr &rtppack, bool key_pos) {
+	// 获取rtp数据长度
+    int length = rtppack->size() - rtppack->offset;
+
+	// 获取rtp数据
+	const uint8_t *rtp_packet_buf = (uint8_t *)rtppack->data() + rtppack->offset;
+
+    _adts->frameLength = length;
+    memcpy(_adts->buffer, rtp_packet_buf, length);
+    if (rtppack->mark == true) {
+        _adts->timeStamp = rtppack->timeStamp;
+        onGetG711(_adts);
+    }
+    return false;
+}
+
+void G711RtpDecoder::onGetG711(const G711Frame::Ptr &frame) {
+    //写入环形缓存
+    RtpCodec::inputFrame(frame);
+    _adts = obtainFrame();
+}
+
+
+}//namespace mediakit
+
+
+