feat: add support of codec plugin

ext-codec/AACRtp.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2016-present The ZLMediaKit project authors. All Rights Reserved.
+ *
+ * This file is part of ZLMediaKit(https://github.com/ZLMediaKit/ZLMediaKit).
+ *
+ * Use of this source code is governed by MIT-like 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_AACRTPCODEC_H
+#define ZLMEDIAKIT_AACRTPCODEC_H
+
+#include "AAC.h"
+#include "Rtsp/RtpCodec.h"
+
+namespace mediakit {
+/**
+ * aac rtp转adts类
+ */
+class AACRtpDecoder : public RtpCodec {
+public:
+    using Ptr = std::shared_ptr<AACRtpDecoder>;
+
+    AACRtpDecoder();
+
+    /**
+     * 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;
+
+private:
+    void obtainFrame();
+    void flushData();
+
+private:
+    uint64_t _last_dts = 0;
+    FrameImp::Ptr _frame;
+};
+
+
+/**
+ * aac adts转rtp类
+ */
+class AACRtpEncoder : public RtpCodec {
+public:
+    using Ptr = std::shared_ptr<AACRtpEncoder>;
+
+    /**
+     * 输入aac 数据，必须带dats头
+     * @param frame 带dats头的aac数据
+     */
+    bool inputFrame(const Frame::Ptr &frame) override;
+
+private:
+    void outputRtp(const char *data, size_t len, size_t total_len, bool mark, uint64_t stamp);
+
+};
+
+}//namespace mediakit
+
+#endif //ZLMEDIAKIT_AACRTPCODEC_H