增强hls点播功能，每个切片文件夹生成一个m3u8索引文件

conf/config.ini

@@ -139,8 +139,8 @@ listen_ip=::
 fileBufSize=65536
 #hls最大切片时间
 segDur=2
-#m3u8索引中,hls保留切片个数(实际保留切片个数大2~3个)
-#如果设置为0，则不删除切片，而是保存为点播
+#m3u8索引中,hls保留切片个数(实际保留切片个数+segRetain个)
+#如果设置为0，则不删除切片且m3u8文件全量记录切片列表
 segNum=3
 #HLS切片延迟个数，大于0将生成hls_delay.m3u8文件，0则不生成
 segDelay=0
@@ -150,10 +150,8 @@ segRetain=5
 broadcastRecordTs=0
 #直播hls文件删除延时，单位秒，issue: #913
 deleteDelaySec=10
-#是否保留hls文件，此功能部分等效于segNum=0的情况
-#不同的是这个保留不会在m3u8文件中体现
-#0为不保留，不起作用
-#1为保留，则不删除hls文件，如果开启此功能，注意磁盘大小，或者定期手动清理hls文件
+#此选项开启后m3u8文件还是表现为直播，但是切片文件会被全部保留为点播用
+#segDur设置为0或segKeep设置为1的情况下，每个切片文件夹下会生成一个vod.m3u8文件用于点播该时间段的录像
 segKeep=0
 #如果设置为1，则第一个切片长度强制设置为1个GOP。当GOP小于segDur，可以提高首屏速度
 fastRegister=0

src/Record/HlsMaker.cpp

@@ -122,9 +122,9 @@ void HlsMaker::inputData(const char *data, size_t len, uint64_t timestamp, bool
 
 void HlsMaker::delOldSegment() {
     GET_CONFIG(uint32_t, segDelay, Hls::kSegmentDelay);
-    if (_seg_number == 0) {
-        // 如果设置为保留0个切片，则认为是保存为点播  [AUTO-TRANSLATED:5bf20108]
-        // If set to keep 0 slices, it is considered to be saved as on-demand
+    if (_seg_number == 0 || _seg_keep) {
+        // 如果设置为保留0个切片，则认为是保存为点播；或者设置为一直保存，就不删除  [AUTO-TRANSLATED:5bf20108]
+        // If set to keep 0 or all slices, it is considered to be saved as on-demand
         return;
     }
     // 在hls m3u8索引文件中,我们保存的切片个数跟_seg_number相关设置一致  [AUTO-TRANSLATED:b14b5b98]
@@ -132,11 +132,6 @@ void HlsMaker::delOldSegment() {
     if (_file_index > _seg_number + segDelay) {
         _seg_dur_list.pop_front();
     }
-    // 如果设置为一直保存，就不删除  [AUTO-TRANSLATED:7c622e24]
-    // If set to always save, it will not be deleted
-    if (_seg_keep) {
-        return;
-    }
     GET_CONFIG(uint32_t, segRetain, Hls::kSegmentRetain);
     // 但是实际保存的切片个数比m3u8所述多若干个,这样做的目的是防止播放器在切片删除前能下载完毕  [AUTO-TRANSLATED:1688f857]
     // However, the actual number of slices saved is a few more than what is stated in the m3u8, this is done to prevent the player from downloading the slices before they are deleted

src/Record/HlsMakerImp.cpp

@@ -49,6 +49,10 @@ HlsMakerImp::~HlsMakerImp() {
     } catch (std::exception &ex) {
         WarnL << ex.what();
     }
+
+    if (!isLive() || isKeep()) {
+        saveCurrentDir();
+    }
 }
 
 void HlsMakerImp::clearCache() {
@@ -99,17 +103,66 @@ void HlsMakerImp::clearCache(bool immediately, bool eof) {
     _segment_file_paths.clear();
 }
 
+/** 写入该目录的init.mp4文件以及m3u8文件 **/
+void HlsMakerImp::saveCurrentDir() {
+    if (_current_dir.empty() || _current_dir_seg_list.empty()) {
+        return;
+    }
+    if (isFmp4()) {
+        // 写入init.mp4文件
+        File::saveFile(_current_dir_init_file, _path_prefix + "/" + _current_dir + "init.mp4");
+    }
+
+    int maxSegmentDuration = 0;
+    for (auto &tp : _current_dir_seg_list) {
+        int dur = std::get<0>(tp);
+        if (dur > maxSegmentDuration) {
+            maxSegmentDuration = dur;
+        }
+    }
+
+    string index_str;
+    index_str.reserve(2048);
+    index_str += "#EXTM3U\n";
+    index_str += (isFmp4() ? "#EXT-X-VERSION:7\n" : "#EXT-X-VERSION:4\n");
+    index_str += "#EXT-X-ALLOW-CACHE:YES\n";
+    index_str += "#EXT-X-TARGETDURATION:" + std::to_string((maxSegmentDuration + 999) / 1000) + "\n";
+    index_str += "#EXT-X-MEDIA-SEQUENCE:0\n";
+    if (isFmp4()) {
+        index_str += "#EXT-X-MAP:URI=\"init.mp4\"\n";
+    }
+    stringstream ss;
+    for (auto &t : _current_dir_seg_list) {
+        ss << "#EXTINF:" << std::setprecision(3) << std::get<0>(t) / 1000.0 << ",\n" << std::get<1>(t) << "\n";
+    }
+    _current_dir_seg_list.clear();
+    index_str += ss.str();
+    index_str += "#EXT-X-ENDLIST\n";
+
+    /** 写入该目录的m3u8文件 **/
+    File::saveFile(index_str, _path_prefix + "/" + _current_dir + (isFmp4() ? "vod.fmp4.m3u8" : "vod.m3u8"));
+}
+
 string HlsMakerImp::onOpenSegment(uint64_t index) {
     string segment_name, segment_path;
     {
         auto strDate = getTimeStr("%Y-%m-%d");
         auto strHour = getTimeStr("%H");
         auto strTime = getTimeStr("%M-%S");
-        segment_name = StrPrinter << strDate + "/" + strHour + "/" + strTime << "_" << index << (isFmp4() ? ".mp4" : ".ts");
+        auto current_dir = strDate + "/" + strHour + "/";
+        segment_name = current_dir + strTime + "_" + std::to_string(index) + (isFmp4() ? ".mp4" : ".ts");
         segment_path = _path_prefix + "/" + segment_name;
         if (isLive()) {
+            // 直播
             _segment_file_paths.emplace(index, segment_path);
         }
+        if (!isLive() || isKeep()) {
+            // 目录将发生变更，保留ts切片时，每个目录都生成一个m3u8文件
+            if (!_current_dir.empty() && current_dir != _current_dir) {
+                saveCurrentDir();
+            }
+            _current_dir = std::move(current_dir);
+        }
     }
     _file = makeFile(segment_path, true);
 
@@ -139,13 +192,14 @@ void HlsMakerImp::onDelSegment(uint64_t index) {
 }
 
 void HlsMakerImp::onWriteInitSegment(const char *data, size_t len) {
+    if (!isLive() || isKeep()) {
+        _current_dir_init_file.assign(data, len);
+    }
     string init_seg_path = _path_prefix + "/init.mp4";
-    _file = makeFile(init_seg_path);
-
-    if (_file) {
-        fwrite(data, len, 1, _file.get());
+    auto file = makeFile(init_seg_path);
+    if (file) {
+        fwrite(data, len, 1, file.get());
         _path_init = std::move(init_seg_path);
-        _file = nullptr;
     } else {
         WarnL << "Create file failed," << init_seg_path << " " << get_uv_errmsg();
     }
@@ -178,7 +232,9 @@ void HlsMakerImp::onFlushLastSegment(uint64_t duration_ms) {
     // 关闭并flush文件到磁盘  [AUTO-TRANSLATED:9798ec4d]
     // Close and flush file to disk
     _file = nullptr;
-
+    if (!isLive() || isKeep()) {
+        _current_dir_seg_list.emplace_back(duration_ms, _info.file_name.erase(0, _current_dir.size()));
+    }
     GET_CONFIG(bool, broadcastRecordTs, Hls::kBroadcastRecordTs);
     if (broadcastRecordTs) {
         _info.time_len = duration_ms / 1000.0f;

src/Record/HlsMakerImp.h

@@ -63,6 +63,7 @@ protected:
 private:
     std::shared_ptr<FILE> makeFile(const std::string &file,bool setbuf = false);
     void clearCache(bool immediately, bool eof);
+    void saveCurrentDir();
 
 private:
     int _buf_size;
@@ -71,12 +72,15 @@ private:
     std::string _path_hls_delay;
     std::string _path_init;
     std::string _path_prefix;
+    std::string _current_dir;
+    std::string _current_dir_init_file;
     RecordInfo _info;
     std::shared_ptr<FILE> _file;
     std::shared_ptr<char> _file_buf;
     HlsMediaSource::Ptr _media_src;
     toolkit::EventPoller::Ptr _poller;
     std::map<uint64_t/*index*/,std::string/*file_path*/> _segment_file_paths;
+    std::deque<std::tuple<int,std::string> > _current_dir_seg_list;
 };
 
 }//namespace mediakit