feat: add support of codec plugin

ext-codec/H264Rtmp.h

@@ -0,0 +1,78 @@
+/*
+ * 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_H264RTMPCODEC_H
+#define ZLMEDIAKIT_H264RTMPCODEC_H
+
+#include "H264.h"
+#include "Rtmp/RtmpCodec.h"
+#include "Extension/Track.h"
+
+namespace mediakit {
+/**
+ * h264 Rtmp解码类
+ * 将 h264 over rtmp 解复用出 h264-Frame
+ */
+class H264RtmpDecoder : public RtmpCodec {
+public:
+    using Ptr = std::shared_ptr<H264RtmpDecoder>;
+
+    H264RtmpDecoder(const Track::Ptr &track) : RtmpCodec(track) {}
+
+    /**
+     * 输入264 Rtmp包
+     * @param rtmp Rtmp包
+     */
+    void inputRtmp(const RtmpPacket::Ptr &rtmp) override;
+
+private:
+    void outputFrame(const char *data, size_t len, uint32_t dts, uint32_t pts);
+    void splitFrame(const uint8_t *data, size_t size, uint32_t dts, uint32_t pts);
+};
+
+/**
+ * 264 Rtmp打包类
+ */
+class H264RtmpEncoder : public RtmpCodec {
+public:
+    using Ptr = std::shared_ptr<H264RtmpEncoder>;
+
+    /**
+     * 构造函数，track可以为空，此时则在inputFrame时输入sps pps
+     * 如果track不为空且包含sps pps信息，
+     * 那么inputFrame时可以不输入sps pps
+     * @param track
+     */
+    H264RtmpEncoder(const Track::Ptr &track) : RtmpCodec(track) {}
+
+    /**
+     * 输入264帧，可以不带sps pps
+     * @param frame 帧数据
+     */
+    bool inputFrame(const Frame::Ptr &frame) override;
+
+    /**
+     * 刷新输出所有frame缓存
+     */
+    void flush() override;
+
+    /**
+     * 生成config包
+     */
+    void makeConfigPacket() override;
+
+private:
+    RtmpPacket::Ptr _rtmp_packet;
+    FrameMerger _merger { FrameMerger::mp4_nal_size };
+};
+
+}//namespace mediakit
+
+#endif //ZLMEDIAKIT_H264RTMPCODEC_H