优化hls媒体流注册与无人观看清理机制 (#1421)

* 优化hls媒体流注册与无人观看清理机制

* 优化hls cookie管理

* bug fixed

src/Record/HlsMakerImp.cpp

@@ -117,7 +117,7 @@ void HlsMakerImp::onWriteHls(const std::string &data) {
         fwrite(data.data(), data.size(), 1, hls.get());
         hls.reset();
         if (_media_src) {
-            _media_src->registHls(data);
+            _media_src->setIndexFile(data);
         }
     } else {
         WarnL << "create hls file failed," << _path_hls << " " << get_uv_errmsg();

src/Record/HlsMediaSource.cpp

@@ -23,7 +23,7 @@ HlsCookieData::HlsCookieData(const MediaInfo &info, const std::shared_ptr<SockIn
 
 void HlsCookieData::addReaderCount() {
     if (!*_added) {
-        auto src = std::dynamic_pointer_cast<HlsMediaSource>(MediaSource::find(HLS_SCHEMA, _info._vhost, _info._app, _info._streamid));
+        auto src = getMediaSource();
         if (src) {
             *_added = true;
             _ring_reader = src->getRing()->attach(EventPollerPool::Instance().getPoller());

src/Record/HlsMediaSource.h

@@ -39,12 +39,10 @@ public:
     int readerCount() override { return _ring ? _ring->readerCount() : 0; }
 
     /**
-     * 生成m3u8文件时触发
-     * @param index_file m3u8文件内容
+     * 设置或清空m3u8索引文件内容
      */
-    void registHls(std::string index_file) {
-        if (!_is_regist) {
-            _is_regist = true;
+    void setIndexFile(std::string index_file) {
+        if (!_ring) {
             std::weak_ptr<HlsMediaSource> weakSelf = std::dynamic_pointer_cast<HlsMediaSource>(shared_from_this());
             auto lam = [weakSelf](int size) {
                 auto strongSelf = weakSelf.lock();
@@ -58,19 +56,19 @@ public:
             regist();
         }
 
-        if (index_file.empty()) {
-            //没产生索引文件, 只是为了触发媒体注册
-            return;
-        }
-
         //赋值m3u8索引文件内容
         std::lock_guard<std::mutex> lck(_mtx_index);
         _index_file = std::move(index_file);
 
+        if (!_index_file.empty()) {
             _list_cb.for_each([&](const std::function<void(const std::string &str)> &cb) { cb(_index_file); });
             _list_cb.clear();
         }
+    }
 
+    /**
+     * 异步获取m3u8文件
+     */
     void getIndexFile(std::function<void(const std::string &str)> cb) {
         std::lock_guard<std::mutex> lck(_mtx_index);
         if (!_index_file.empty()) {
@@ -81,6 +79,9 @@ public:
         _list_cb.emplace_back(std::move(cb));
     }
 
+    /**
+     * 同步获取m3u8文件
+     */
     std::string getIndexFile() const {
         std::lock_guard<std::mutex> lck(_mtx_index);
         return _index_file;
@@ -89,12 +90,10 @@ public:
     void onSegmentSize(size_t bytes) { _speed[TrackVideo] += bytes; }
 
 private:
-    bool _is_regist = false;
     RingType::Ptr _ring;
-
     std::string _index_file;
     mutable std::mutex _mtx_index;
-    toolkit::List<std::function<void(const std::string &)> > _list_cb;
+    toolkit::List<std::function<void(const std::string &)>> _list_cb;
 };
 
 class HlsCookieData {

src/Record/HlsRecorder.h

@@ -38,36 +38,28 @@ public:
     void setListener(const std::weak_ptr<MediaSourceEvent> &listener) {
         setDelegate(listener);
         _hls->getMediaSource()->setListener(shared_from_this());
-        //先注册媒体流，后续可以按需生成
-        _hls->getMediaSource()->registHls("");
     }
 
-    int readerCount() {
-        return _hls->getMediaSource()->readerCount();
-    }
+    int readerCount() { return _hls->getMediaSource()->readerCount(); }
 
     void onReaderChanged(MediaSource &sender, int size) override {
         GET_CONFIG(bool, hls_demand, General::kHlsDemand);
-        //hls保留切片个数为0时代表为hls录制(不删除切片)，那么不管有无观看者都一直生成hls
+        // hls保留切片个数为0时代表为hls录制(不删除切片)，那么不管有无观看者都一直生成hls
         _enabled = hls_demand ? (_hls->isLive() ? size : true) : true;
         if (!size && _hls->isLive() && hls_demand) {
-            //hls直播时，如果无人观看就删除视频缓存，目的是为了防止视频跳跃
+            // hls直播时，如果无人观看就删除视频缓存，目的是为了防止视频跳跃
             _clear_cache = true;
         }
         MediaSourceEventInterceptor::onReaderChanged(sender, size);
     }
 
-    bool isEnabled() {
-        GET_CONFIG(bool, hls_demand, General::kHlsDemand);
-        //缓存尚未清空时，还允许触发inputFrame函数，以便及时清空缓存
-        return hls_demand ? (_clear_cache ? true : _enabled) : true;
-    }
-
     bool inputFrame(const Frame::Ptr &frame) override {
         GET_CONFIG(bool, hls_demand, General::kHlsDemand);
         if (_clear_cache && hls_demand) {
             _clear_cache = false;
+            //清空旧的m3u8索引文件于ts切片
             _hls->clearCache();
+            _hls->getMediaSource()->setIndexFile("");
         }
         if (_enabled || !hls_demand) {
             return MpegMuxer::inputFrame(frame);
@@ -75,6 +67,12 @@ public:
         return false;
     }
 
+    bool isEnabled() {
+        GET_CONFIG(bool, hls_demand, General::kHlsDemand);
+        //缓存尚未清空时，还允许触发inputFrame函数，以便及时清空缓存
+        return hls_demand ? (_clear_cache ? true : _enabled) : true;
+    }
+
 private:
     void onWrite(std::shared_ptr<toolkit::Buffer> buffer, uint32_t timestamp, bool key_pos) override {
         if (!buffer) {
@@ -85,8 +83,7 @@ private:
     }
 
 private:
-    //默认不生成hls文件，有播放器时再生成
-    bool _enabled = false;
+    bool _enabled = true;
     bool _clear_cache = false;
     std::shared_ptr<HlsMakerImp> _hls;
 };