don't save total duration if hls_total_file is not configured

@@ -73,7 +73,7 @@ const char* _srs_version = "XCORE-"RTMP_SIG_SRS_SERVER;
 #define SRS_CONF_DEFAULT_HLS_PATH "./objs/nginx/html"
 #define SRS_CONF_DEFAULT_HLS_M3U8_FILE "[app]/[stream].m3u8"
 #define SRS_CONF_DEFAULT_HLS_TOTAL_M3U8_FILE ""
-#define SRS_CONF_DEFAULT_HLS_TOTAL_FILE "[app]/[stream]_total"
+#define SRS_CONF_DEFAULT_HLS_TOTAL_FILE ""
 #define SRS_CONF_DEFAULT_HLS_TS_FILE "[app]/[stream]-[seq].ts"
 #define SRS_CONF_DEFAULT_HLS_TS_FLOOR false
 #define SRS_CONF_DEFAULT_HLS_FRAGMENT 10

@@ -833,26 +833,30 @@ int SrsHlsMuxer::segment_close(string log_desc)
 			}
 			srs_info("write total m3u8 %s success.", m3u8_total_file.c_str());
 
-			this->total_duraion += currentSeg->duration;
-			SrsFileWriter total_writer;
-			//write total duration to total
-			std::stringstream ss_total;
-
-			std::string total_tmp = total + ".tmp";
-			ret = total_writer.open(total_tmp);
-			ss_total.precision(3);
-			ss_total.setf(std::ios::fixed, std::ios::floatfield);
-			ss_total << total_duraion;
-
-			if ((ret = total_writer.write((char*) ss_total.str().c_str(),
-								(int) ss_total.str().length(), NULL)) != ERROR_SUCCESS) {
-							srs_error("write total temp:%s failed. ret=%d",(char*) total_tmp.c_str(), ret);
-							return ret;
-			}
+			if (!total_url.empty()) {
+				this->total_duraion += currentSeg->duration;
+				SrsFileWriter total_writer;
+				//write total duration to total
+				std::stringstream ss_total;
+
+				std::string total_tmp = total + ".tmp";
+				ret = total_writer.open(total_tmp);
+				ss_total.precision(3);
+				ss_total.setf(std::ios::fixed, std::ios::floatfield);
+				ss_total << total_duraion;
+
+				if ((ret = total_writer.write((char*) ss_total.str().c_str(),
+						(int) ss_total.str().length(), NULL)) != ERROR_SUCCESS) {
+					srs_error("write total temp:%s failed. ret=%d",
+							(char* ) total_tmp.c_str(), ret);
+					return ret;
+				}
 
-			if(rename(total_tmp.c_str(), total.c_str()) < 0) {
-			            ret = ERROR_HLS_WRITE_FAILED;
-			            srs_error("rename total file failed. %s => %s, ret=%d", total_tmp.c_str(), total.c_str(), ret);
+				if (rename(total_tmp.c_str(), total.c_str()) < 0) {
+					ret = ERROR_HLS_WRITE_FAILED;
+					srs_error("rename total file failed. %s => %s, ret=%d",
+							total_tmp.c_str(), total.c_str(), ret);
+				}
 			}
 		}