feat: add support of codec plugin

ext-codec/AACRtmp.h

@@ -0,0 +1,67 @@
+/*
+ * 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_AACRTMPCODEC_H
+#define ZLMEDIAKIT_AACRTMPCODEC_H
+
+#include "AAC.h"
+#include "Rtmp/RtmpCodec.h"
+#include "Extension/Track.h"
+
+namespace mediakit {
+/**
+ * aac Rtmp转adts类
+ */
+class AACRtmpDecoder : public RtmpCodec {
+public:
+    using Ptr = std::shared_ptr<AACRtmpDecoder>;
+
+    AACRtmpDecoder(const Track::Ptr &track) : RtmpCodec(track) {}
+
+    /**
+     * 输入Rtmp并解码
+     * @param rtmp Rtmp数据包
+     */
+    void inputRtmp(const RtmpPacket::Ptr &rtmp) override;
+};
+
+/**
+ * aac adts转Rtmp类
+ */
+class AACRtmpEncoder : public RtmpCodec {
+public:
+    using Ptr = std::shared_ptr<AACRtmpEncoder>;
+
+    /**
+     * 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
+     */
+    AACRtmpEncoder(const Track::Ptr &track) : RtmpCodec(track) {}
+
+    /**
+     * 输入aac 数据，可以不带adts头
+     * @param frame aac数据
+     */
+    bool inputFrame(const Frame::Ptr &frame) override;
+
+    /**
+     * 生成config包
+     */
+    void makeConfigPacket() override;
+
+private:
+    uint8_t _audio_flv_flags {0};
+};
+
+}//namespace mediakit
+
+#endif //ZLMEDIAKIT_AACRTMPCODEC_H