各协议全面支持vp8/vp9/av1编码，ertmp新增支持opus编码 (#4498)

实现功能：
- rtp 增加vp8，vp9和av1编码支持
- 实现MP4录像所需的extra_data接口
- 扩展rtmp增加对opus、vp8、vp9和av1的支持

已知问题：
- 开启enhance rtmp后，ffmpeg暂时不支持播放vp8编码格式，其他格式的支持
- vp9和av1开始播放时容易遇到卡顿情况，过几秒后好了，原因暂时未知

---------

Co-authored-by: xia-chu <771730766@qq.com>

ext-codec/OpusRtmp.h

@@ -0,0 +1,51 @@
+/*
+ * 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_OPUS_RTMPCODEC_H
+#define ZLMEDIAKIT_OPUS_RTMPCODEC_H
+
+#include "Rtmp/RtmpCodec.h"
+#include "Extension/Track.h"
+
+namespace mediakit {
+/**
+ * Rtmp解码类
+ * 将 Opus over rtmp 解复用出 OpusFrame
+ */
+class OpusRtmpDecoder : public RtmpCodec {
+public:
+    using Ptr = std::shared_ptr<OpusRtmpDecoder>;
+
+    OpusRtmpDecoder(const Track::Ptr &track) : RtmpCodec(track) {}
+
+    void inputRtmp(const RtmpPacket::Ptr &rtmp) override;
+
+protected:
+    void outputFrame(const char *data, size_t size, uint32_t dts, uint32_t pts);
+};
+
+/**
+ * Rtmp打包类
+ */
+class OpusRtmpEncoder : public RtmpCodec {
+    bool _enhanced = false;
+public:
+    using Ptr = std::shared_ptr<OpusRtmpEncoder>;
+
+    OpusRtmpEncoder(const Track::Ptr &track);
+
+    bool inputFrame(const Frame::Ptr &frame) override;
+
+    void makeConfigPacket() override;
+};
+
+} // namespace mediakit
+
+#endif // ZLMEDIAKIT_OPUS_RTMPCODEC_H