refine config, group by sections.

@@ -765,6 +765,91 @@ void SrsConfig::print_help(char** argv)
         argv[0]);
 }
 
+bool SrsConfig::get_deamon()
+{
+    srs_assert(root);
+    
+    SrsConfDirective* conf = root->get("daemon");
+    if (conf && conf->arg0() == "off") {
+        return false;
+    }
+    
+    return true;
+}
+
+int SrsConfig::get_max_connections()
+{
+    srs_assert(root);
+    
+    SrsConfDirective* conf = root->get("max_connections");
+    if (!conf || conf->arg0().empty()) {
+        return 2000;
+    }
+    
+    return ::atoi(conf->arg0().c_str());
+}
+
+SrsConfDirective* SrsConfig::get_listen()
+{
+    return root->get("listen");
+}
+
+string SrsConfig::get_pid_file()
+{
+    SrsConfDirective* conf = root->get("pid");
+    
+    if (!conf) {
+        return SRS_CONF_DEFAULT_PID_FILE;
+    }
+    
+    return conf->arg0();
+}
+
+int SrsConfig::get_pithy_print_publish()
+{
+    SrsConfDirective* pithy = root->get("pithy_print");
+    if (!pithy) {
+        return SRS_STAGE_PUBLISH_USER_INTERVAL_MS;
+    }
+    
+    pithy = pithy->get("publish");
+    if (!pithy) {
+        return SRS_STAGE_PUBLISH_USER_INTERVAL_MS;
+    }
+    
+    return ::atoi(pithy->arg0().c_str());
+}
+
+int SrsConfig::get_pithy_print_forwarder()
+{
+    SrsConfDirective* pithy = root->get("pithy_print");
+    if (!pithy) {
+        return SRS_STAGE_FORWARDER_INTERVAL_MS;
+    }
+    
+    pithy = pithy->get("forwarder");
+    if (!pithy) {
+        return SRS_STAGE_FORWARDER_INTERVAL_MS;
+    }
+    
+    return ::atoi(pithy->arg0().c_str());
+}
+
+int SrsConfig::get_pithy_print_hls()
+{
+    SrsConfDirective* pithy = root->get("pithy_print");
+    if (!pithy) {
+        return SRS_STAGE_HLS_INTERVAL_MS;
+    }
+    
+    pithy = pithy->get("hls");
+    if (!pithy) {
+        return SRS_STAGE_HLS_INTERVAL_MS;
+    }
+    
+    return ::atoi(pithy->arg0().c_str());
+}
+
 SrsConfDirective* SrsConfig::get_vhost(string vhost)
 {
     srs_assert(root);
@@ -939,190 +1024,156 @@ bool SrsConfig::get_vhost_enabled(SrsConfDirective* vhost)
     return true;
 }
 
-SrsConfDirective* SrsConfig::get_transcode(string vhost, string scope)
+bool SrsConfig::get_gop_cache(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);
 
     if (!conf) {
-        return NULL;
-    }
-    
-    SrsConfDirective* transcode = conf->get("transcode");
-    if (!transcode) {
-        return NULL;
-    }
-    
-    if (transcode->arg0() == scope) {
-        return transcode;
-    }
-    
-    return NULL;
-}
-
-bool SrsConfig::get_transcode_enabled(SrsConfDirective* transcode)
-{
-    if (!transcode) {
-        return false;
+        return true;
     }
     
-    SrsConfDirective* conf = transcode->get("enabled");
-    if (!conf || conf->arg0() != "on") {
+    conf = conf->get("gop_cache");
+    if (conf && conf->arg0() == "off") {
         return false;
     }
     
     return true;
 }
 
-string SrsConfig::get_transcode_ffmpeg(SrsConfDirective* transcode)
+bool SrsConfig::get_atc(string vhost)
 {
-    if (!transcode) {
-        return "";
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = transcode->get("ffmpeg");
     if (!conf) {
-        return "";
-    }
-    
-    return conf->arg0();
-}
-
-void SrsConfig::get_transcode_engines(SrsConfDirective* transcode, std::vector<SrsConfDirective*>& engines)
-{
-    if (!transcode) {
-        return;
+        return true;
     }
     
-    for (int i = 0; i < (int)transcode->directives.size(); i++) {
-        SrsConfDirective* conf = transcode->directives[i];
-        
-        if (conf->name == "engine") {
-            engines.push_back(conf);
-        }
+    conf = conf->get("atc");
+    if (conf && conf->arg0() == "on") {
+        return true;
     }
     
-    return;
+    return false;
 }
 
-bool SrsConfig::get_engine_enabled(SrsConfDirective* engine)
+double SrsConfig::get_queue_length(string vhost)
 {
-    if (!engine) {
-        return false;
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
     }
     
-    SrsConfDirective* conf = engine->get("enabled");
-    if (!conf || conf->arg0() != "on") {
-        return false;
+    conf = conf->get("queue_length");
+    if (!conf || conf->arg0().empty()) {
+        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
     }
     
-    return true;
+    return ::atoi(conf->arg0().c_str());
 }
 
-string SrsConfig::get_engine_vcodec(SrsConfDirective* engine)
+SrsConfDirective* SrsConfig::get_forward(string vhost)
 {
-    if (!engine) {
-        return "";
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = engine->get("vcodec");
     if (!conf) {
-        return "";
+        return NULL;
     }
     
-    return conf->arg0();
+    return conf->get("forward");
 }
 
-int SrsConfig::get_engine_vbitrate(SrsConfDirective* engine)
+SrsConfDirective* SrsConfig::get_refer(string vhost)
 {
-    if (!engine) {
-        return 0;
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = engine->get("vbitrate");
     if (!conf) {
-        return 0;
+        return NULL;
     }
     
-    return ::atoi(conf->arg0().c_str());
+    return conf->get("refer");
 }
 
-double SrsConfig::get_engine_vfps(SrsConfDirective* engine)
+SrsConfDirective* SrsConfig::get_refer_play(string vhost)
 {
-    if (!engine) {
-        return 0;
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = engine->get("vfps");
     if (!conf) {
-        return 0;
+        return NULL;
     }
     
-    return ::atof(conf->arg0().c_str());
+    return conf->get("refer_play");
 }
 
-int SrsConfig::get_engine_vwidth(SrsConfDirective* engine)
+SrsConfDirective* SrsConfig::get_refer_publish(string vhost)
 {
-    if (!engine) {
-        return 0;
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = engine->get("vwidth");
     if (!conf) {
-        return 0;
+        return NULL;
     }
     
-    return ::atoi(conf->arg0().c_str());
+    return conf->get("refer_publish");
 }
 
-int SrsConfig::get_engine_vheight(SrsConfDirective* engine)
+int SrsConfig::get_chunk_size(const std::string &vhost)
 {
-    if (!engine) {
-        return 0;
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return SRS_CONF_DEFAULT_CHUNK_SIZE;
     }
 
-    SrsConfDirective* conf = engine->get("vheight");
+    conf = conf->get("chunk_size");
     if (!conf) {
-        return 0;
+        // vhost does not specify the chunk size,
+        // use the global instead.
+        conf = root->get("chunk_size");
+        if (!conf) {
+            return SRS_CONF_DEFAULT_CHUNK_SIZE;
+        }
+        
+        return ::atoi(conf->arg0().c_str());
     }
 
     return ::atoi(conf->arg0().c_str());
 }
 
-int SrsConfig::get_engine_vthreads(SrsConfDirective* engine)
+bool SrsConfig::get_bw_check_enabled(const string &vhost)
 {
-    if (!engine) {
-        return 0;
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return false;
     }
 
-    SrsConfDirective* conf = engine->get("vthreads");
+    conf = conf->get("bandcheck");
     if (!conf) {
-        return 0;
+        return false;
     }
 
-    return ::atoi(conf->arg0().c_str());
+    conf = conf->get("enabled");
+    if (!conf || conf->arg0() != "on") {
+        return false;
+    }
+
+    return true;
 }
 
-string SrsConfig::get_engine_vprofile(SrsConfDirective* engine)
+string SrsConfig::get_bw_check_key(const string &vhost)
 {
-    if (!engine) {
-        return "";
-    }
+    SrsConfDirective* conf = get_vhost(vhost);
 
-    SrsConfDirective* conf = engine->get("vprofile");
     if (!conf) {
         return "";
     }
 
-    return conf->arg0();
-}
-
-string SrsConfig::get_engine_vpreset(SrsConfDirective* engine)
-{
-    if (!engine) {
+    conf = conf->get("bandcheck");
+    if (!conf) {
         return "";
     }
     
-    SrsConfDirective* conf = engine->get("vpreset");
+    conf = conf->get("key");
     if (!conf) {
         return "";
     }
@@ -1130,57 +1181,134 @@ string SrsConfig::get_engine_vpreset(SrsConfDirective* engine)
     return conf->arg0();
 }
 
-void SrsConfig::get_engine_vparams(SrsConfDirective* engine, std::vector<string>& vparams)
+int SrsConfig::get_bw_check_interval_ms(const string &vhost)
 {
-    if (!engine) {
-        return;
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
     }
 
-    SrsConfDirective* conf = engine->get("vparams");
+    conf = conf->get("bandcheck");
     if (!conf) {
-        return;
+        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
     }
     
-    for (int i = 0; i < (int)conf->directives.size(); i++) {
-        SrsConfDirective* p = conf->directives[i];
-        if (!p) {
-            continue;
+    conf = conf->get("interval_ms");
+    if (!conf) {
+        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
     }
 
-        vparams.push_back("-" + p->name);
-        vparams.push_back(p->arg0());
+    return ::atoi(conf->arg0().c_str()) * 1000;
+}
+
+int SrsConfig::get_bw_check_limit_kbps(const string &vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
+    }
+
+    conf = conf->get("bandcheck");
+    if (!conf) {
+        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
+    }
+    
+    conf = conf->get("limit_kbps");
+    if (!conf) {
+        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
     }
+
+    return ::atoi(conf->arg0().c_str());
 }
 
-void SrsConfig::get_engine_vfilter(SrsConfDirective* engine, std::vector<string>& vfilter)
+SrsConfDirective* SrsConfig::get_transcode(string vhost, string scope)
 {
-    if (!engine) {
-        return;
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return NULL;
     }
     
-    SrsConfDirective* conf = engine->get("vfilter");
+    SrsConfDirective* transcode = conf->get("transcode");
+    if (!transcode) {
+        return NULL;
+    }
+    
+    if (transcode->arg0() == scope) {
+        return transcode;
+    }
+    
+    return NULL;
+}
+
+bool SrsConfig::get_transcode_enabled(SrsConfDirective* transcode)
+{
+    if (!transcode) {
+        return false;
+    }
+    
+    SrsConfDirective* conf = transcode->get("enabled");
+    if (!conf || conf->arg0() != "on") {
+        return false;
+    }
+    
+    return true;
+}
+
+string SrsConfig::get_transcode_ffmpeg(SrsConfDirective* transcode)
+{
+    if (!transcode) {
+        return "";
+    }
+    
+    SrsConfDirective* conf = transcode->get("ffmpeg");
     if (!conf) {
+        return "";
+    }
+    
+    return conf->arg0();
+}
+
+void SrsConfig::get_transcode_engines(SrsConfDirective* transcode, std::vector<SrsConfDirective*>& engines)
+{
+    if (!transcode) {
         return;
     }
     
-    for (int i = 0; i < (int)conf->directives.size(); i++) {
-        SrsConfDirective* p = conf->directives[i];
-        if (!p) {
-            continue;
+    for (int i = 0; i < (int)transcode->directives.size(); i++) {
+        SrsConfDirective* conf = transcode->directives[i];
+        
+        if (conf->name == "engine") {
+            engines.push_back(conf);
+        }
     }
     
-        vfilter.push_back("-" + p->name);
-        vfilter.push_back(p->arg0());
+    return;
+}
+
+bool SrsConfig::get_engine_enabled(SrsConfDirective* engine)
+{
+    if (!engine) {
+        return false;
     }
+    
+    SrsConfDirective* conf = engine->get("enabled");
+    if (!conf || conf->arg0() != "on") {
+        return false;
+    }
+    
+    return true;
 }
 
-string SrsConfig::get_engine_acodec(SrsConfDirective* engine)
+string SrsConfig::get_engine_vcodec(SrsConfDirective* engine)
 {
     if (!engine) {
         return "";
     }
     
-    SrsConfDirective* conf = engine->get("acodec");
+    SrsConfDirective* conf = engine->get("vcodec");
     if (!conf) {
         return "";
     }
@@ -1188,13 +1316,13 @@ string SrsConfig::get_engine_acodec(SrsConfDirective* engine)
     return conf->arg0();
 }
 
-int SrsConfig::get_engine_abitrate(SrsConfDirective* engine)
+int SrsConfig::get_engine_vbitrate(SrsConfDirective* engine)
 {
     if (!engine) {
         return 0;
     }
     
-    SrsConfDirective* conf = engine->get("abitrate");
+    SrsConfDirective* conf = engine->get("vbitrate");
     if (!conf) {
         return 0;
     }
@@ -1202,27 +1330,27 @@ int SrsConfig::get_engine_abitrate(SrsConfDirective* engine)
     return ::atoi(conf->arg0().c_str());
 }
 
-int SrsConfig::get_engine_asample_rate(SrsConfDirective* engine)
+double SrsConfig::get_engine_vfps(SrsConfDirective* engine)
 {
     if (!engine) {
         return 0;
     }
     
-    SrsConfDirective* conf = engine->get("asample_rate");
+    SrsConfDirective* conf = engine->get("vfps");
     if (!conf) {
         return 0;
     }
     
-    return ::atoi(conf->arg0().c_str());
+    return ::atof(conf->arg0().c_str());
 }
 
-int SrsConfig::get_engine_achannels(SrsConfDirective* engine)
+int SrsConfig::get_engine_vwidth(SrsConfDirective* engine)
 {
     if (!engine) {
         return 0;
     }
     
-    SrsConfDirective* conf = engine->get("achannels");
+    SrsConfDirective* conf = engine->get("vwidth");
     if (!conf) {
         return 0;
     }
@@ -1230,35 +1358,41 @@ int SrsConfig::get_engine_achannels(SrsConfDirective* engine)
     return ::atoi(conf->arg0().c_str());
 }
 
-void SrsConfig::get_engine_aparams(SrsConfDirective* engine, std::vector<string>& aparams)
+int SrsConfig::get_engine_vheight(SrsConfDirective* engine)
 {
     if (!engine) {
-        return;
+        return 0;
     }
     
-    SrsConfDirective* conf = engine->get("aparams");
+    SrsConfDirective* conf = engine->get("vheight");
     if (!conf) {
-        return;
+        return 0;
     }
     
-    for (int i = 0; i < (int)conf->directives.size(); i++) {
-        SrsConfDirective* p = conf->directives[i];
-        if (!p) {
-            continue;
+    return ::atoi(conf->arg0().c_str());
+}
+
+int SrsConfig::get_engine_vthreads(SrsConfDirective* engine)
+{
+    if (!engine) {
+        return 0;
     }
     
-        aparams.push_back("-" + p->name);
-        aparams.push_back(p->arg0());
+    SrsConfDirective* conf = engine->get("vthreads");
+    if (!conf) {
+        return 0;
     }
+    
+    return ::atoi(conf->arg0().c_str());
 }
 
-string SrsConfig::get_engine_output(SrsConfDirective* engine)
+string SrsConfig::get_engine_vprofile(SrsConfDirective* engine)
 {
     if (!engine) {
         return "";
     }
     
-    SrsConfDirective* conf = engine->get("output");
+    SrsConfDirective* conf = engine->get("vprofile");
     if (!conf) {
         return "";
     }
@@ -1266,87 +1400,154 @@ string SrsConfig::get_engine_output(SrsConfDirective* engine)
     return conf->arg0();
 }
 
-bool SrsConfig::get_deamon()
+string SrsConfig::get_engine_vpreset(SrsConfDirective* engine)
 {
-    srs_assert(root);
+    if (!engine) {
+        return "";
+    }
     
-    SrsConfDirective* conf = root->get("daemon");
-    if (conf && conf->arg0() == "off") {
-        return false;
+    SrsConfDirective* conf = engine->get("vpreset");
+    if (!conf) {
+        return "";
     }
     
-    return true;
+    return conf->arg0();
 }
 
-int SrsConfig::get_max_connections()
+void SrsConfig::get_engine_vparams(SrsConfDirective* engine, std::vector<string>& vparams)
 {
-    srs_assert(root);
+    if (!engine) {
+        return;
+    }
     
-    SrsConfDirective* conf = root->get("max_connections");
-    if (!conf || conf->arg0().empty()) {
-        return 2000;
+    SrsConfDirective* conf = engine->get("vparams");
+    if (!conf) {
+        return;
     }
     
-    return ::atoi(conf->arg0().c_str());
+    for (int i = 0; i < (int)conf->directives.size(); i++) {
+        SrsConfDirective* p = conf->directives[i];
+        if (!p) {
+            continue;
+        }
+        
+        vparams.push_back("-" + p->name);
+        vparams.push_back(p->arg0());
+    }
 }
 
-bool SrsConfig::get_gop_cache(string vhost)
+void SrsConfig::get_engine_vfilter(SrsConfDirective* engine, std::vector<string>& vfilter)
 {
-    SrsConfDirective* conf = get_vhost(vhost);
+    if (!engine) {
+        return;
+    }
     
+    SrsConfDirective* conf = engine->get("vfilter");
     if (!conf) {
-        return true;
+        return;
     }
     
-    conf = conf->get("gop_cache");
-    if (conf && conf->arg0() == "off") {
-        return false;
+    for (int i = 0; i < (int)conf->directives.size(); i++) {
+        SrsConfDirective* p = conf->directives[i];
+        if (!p) {
+            continue;
         }
         
-    return true;
+        vfilter.push_back("-" + p->name);
+        vfilter.push_back(p->arg0());
+    }
 }
 
-bool SrsConfig::get_atc(string vhost)
+string SrsConfig::get_engine_acodec(SrsConfDirective* engine)
 {
-    SrsConfDirective* conf = get_vhost(vhost);
+    if (!engine) {
+        return "";
+    }
     
+    SrsConfDirective* conf = engine->get("acodec");
     if (!conf) {
-        return true;
+        return "";
     }
     
-    conf = conf->get("atc");
-    if (conf && conf->arg0() == "on") {
-        return true;
+    return conf->arg0();
+}
+
+int SrsConfig::get_engine_abitrate(SrsConfDirective* engine)
+{
+    if (!engine) {
+        return 0;
     }
     
-    return false;
+    SrsConfDirective* conf = engine->get("abitrate");
+    if (!conf) {
+        return 0;
+    }
+    
+    return ::atoi(conf->arg0().c_str());
 }
 
-double SrsConfig::get_queue_length(string vhost)
+int SrsConfig::get_engine_asample_rate(SrsConfDirective* engine)
 {
-    SrsConfDirective* conf = get_vhost(vhost);
+    if (!engine) {
+        return 0;
+    }
     
+    SrsConfDirective* conf = engine->get("asample_rate");
     if (!conf) {
-        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
+        return 0;
     }
     
-    conf = conf->get("queue_length");
-    if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
+    return ::atoi(conf->arg0().c_str());
+}
+
+int SrsConfig::get_engine_achannels(SrsConfDirective* engine)
+{
+    if (!engine) {
+        return 0;
+    }
+    
+    SrsConfDirective* conf = engine->get("achannels");
+    if (!conf) {
+        return 0;
     }
     
     return ::atoi(conf->arg0().c_str());
 }
 
-SrsConfDirective* SrsConfig::get_forward(string vhost)
+void SrsConfig::get_engine_aparams(SrsConfDirective* engine, std::vector<string>& aparams)
 {
-    SrsConfDirective* conf = get_vhost(vhost);
+    if (!engine) {
+        return;
+    }
     
+    SrsConfDirective* conf = engine->get("aparams");
     if (!conf) {
-        return NULL;
+        return;
     }
     
-    return conf->get("forward");
+    for (int i = 0; i < (int)conf->directives.size(); i++) {
+        SrsConfDirective* p = conf->directives[i];
+        if (!p) {
+            continue;
+        }
+        
+        aparams.push_back("-" + p->name);
+        aparams.push_back(p->arg0());
+    }
+}
+
+string SrsConfig::get_engine_output(SrsConfDirective* engine)
+{
+    if (!engine) {
+        return "";
+    }
+    
+    SrsConfDirective* conf = engine->get("output");
+    if (!conf) {
+        return "";
+    }
+    
+    return conf->arg0();
 }
 
 string SrsConfig::get_srs_log_file()
@@ -1553,207 +1754,6 @@ int SrsConfig::get_http_stream_listen()
     return 8080;
 }
 
-SrsConfDirective* SrsConfig::get_refer(string vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return NULL;
-    }
-    
-    return conf->get("refer");
-}
-
-SrsConfDirective* SrsConfig::get_refer_play(string vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return NULL;
-    }
-    
-    return conf->get("refer_play");
-}
-
-SrsConfDirective* SrsConfig::get_refer_publish(string vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return NULL;
-    }
-    
-    return conf->get("refer_publish");
-}
-
-SrsConfDirective* SrsConfig::get_listen()
-{
-    return root->get("listen");
-}
-
-string SrsConfig::get_pid_file()
-{
-    SrsConfDirective* conf = root->get("pid");
-    
-    if (!conf) {
-        return SRS_CONF_DEFAULT_PID_FILE;
-    }
-    
-    return conf->arg0();
-}
-
-int SrsConfig::get_chunk_size(const std::string &vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return SRS_CONF_DEFAULT_CHUNK_SIZE;
-    }
-
-    conf = conf->get("chunk_size");
-    if (!conf) {
-        // vhost does not specify the chunk size,
-        // use the global instead.
-        conf = root->get("chunk_size");
-        if (!conf) {
-            return SRS_CONF_DEFAULT_CHUNK_SIZE;
-        }
-        
-        return ::atoi(conf->arg0().c_str());
-    }
-
-    return ::atoi(conf->arg0().c_str());
-}
-
-int SrsConfig::get_pithy_print_publish()
-{
-    SrsConfDirective* pithy = root->get("pithy_print");
-    if (!pithy) {
-        return SRS_STAGE_PUBLISH_USER_INTERVAL_MS;
-    }
-    
-    pithy = pithy->get("publish");
-    if (!pithy) {
-        return SRS_STAGE_PUBLISH_USER_INTERVAL_MS;
-    }
-    
-    return ::atoi(pithy->arg0().c_str());
-}
-
-int SrsConfig::get_pithy_print_forwarder()
-{
-    SrsConfDirective* pithy = root->get("pithy_print");
-    if (!pithy) {
-        return SRS_STAGE_FORWARDER_INTERVAL_MS;
-    }
-    
-    pithy = pithy->get("forwarder");
-    if (!pithy) {
-        return SRS_STAGE_FORWARDER_INTERVAL_MS;
-    }
-    
-    return ::atoi(pithy->arg0().c_str());
-}
-
-int SrsConfig::get_pithy_print_hls()
-{
-    SrsConfDirective* pithy = root->get("pithy_print");
-    if (!pithy) {
-        return SRS_STAGE_HLS_INTERVAL_MS;
-    }
-    
-    pithy = pithy->get("hls");
-    if (!pithy) {
-        return SRS_STAGE_HLS_INTERVAL_MS;
-    }
-    
-    return ::atoi(pithy->arg0().c_str());
-}
-
-bool SrsConfig::get_bw_check_enabled(const string &vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return false;
-    }
-
-    conf = conf->get("bandcheck");
-    if (!conf) {
-        return false;
-    }
-
-    conf = conf->get("enabled");
-    if (!conf || conf->arg0() != "on") {
-        return false;
-    }
-
-    return true;
-}
-
-string SrsConfig::get_bw_check_key(const string &vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return "";
-    }
-
-    conf = conf->get("bandcheck");
-    if (!conf) {
-        return "";
-    }
-    
-    conf = conf->get("key");
-    if (!conf) {
-        return "";
-    }
-
-    return conf->arg0();
-}
-
-int SrsConfig::get_bw_check_interval_ms(const string &vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
-    }
-
-    conf = conf->get("bandcheck");
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
-    }
-    
-    conf = conf->get("interval_ms");
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_INTERVAL;
-    }
-
-    return ::atoi(conf->arg0().c_str()) * 1000;
-}
-
-int SrsConfig::get_bw_check_limit_kbps(const string &vhost)
-{
-    SrsConfDirective* conf = get_vhost(vhost);
-
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
-    }
-
-    conf = conf->get("bandcheck");
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
-    }
-    
-    conf = conf->get("limit_kbps");
-    if (!conf) {
-        return SRS_CONF_DEFAULT_BANDWIDTH_LIMIT_KBPS;
-    }
-
-    return ::atoi(conf->arg0().c_str());
-}
-
 int SrsConfig::get_pithy_print_encoder()
 {
     SrsConfDirective* pithy = root->get("encoder");

@@ -116,6 +116,18 @@ private:
     virtual int parse_file(const char* filename);
     virtual int parse_argv(int& i, char** argv);
     virtual void print_help(char** argv);
+// global section
+public:
+    virtual bool                get_deamon();
+    virtual int                 get_max_connections();
+    virtual SrsConfDirective*   get_listen();
+    virtual std::string         get_pid_file();
+    virtual int                 get_pithy_print_publish();
+    virtual int                 get_pithy_print_forwarder();
+    virtual int                 get_pithy_print_encoder();
+    virtual int                 get_pithy_print_hls();
+    virtual int                 get_pithy_print_play();
+// vhost section
 public:
     virtual SrsConfDirective*   get_vhost(std::string vhost);
     virtual bool                get_vhost_enabled(std::string vhost);
@@ -126,6 +138,22 @@ public:
     virtual SrsConfDirective*   get_vhost_on_unpublish(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_play(std::string vhost);
     virtual SrsConfDirective*   get_vhost_on_stop(std::string vhost);
+    virtual bool                get_gop_cache(std::string vhost);
+    virtual bool                get_atc(std::string vhost);
+    virtual double              get_queue_length(std::string vhost);
+    virtual SrsConfDirective*   get_forward(std::string vhost);
+    virtual SrsConfDirective*   get_refer(std::string vhost);
+    virtual SrsConfDirective*   get_refer_play(std::string vhost);
+    virtual SrsConfDirective*   get_refer_publish(std::string vhost);
+    virtual int                 get_chunk_size(const std::string& vhost);
+// bwct(bandwidth check tool) section
+public:
+    virtual bool                get_bw_check_enabled(const std::string& vhost);
+    virtual std::string         get_bw_check_key(const std::string& vhost);
+    virtual int                 get_bw_check_interval_ms(const std::string& vhost);
+    virtual int                 get_bw_check_limit_kbps(const std::string& vhost);
+// vhost transcode section
+public:
     virtual SrsConfDirective*   get_transcode(std::string vhost, std::string scope);
     virtual bool                get_transcode_enabled(SrsConfDirective* transcode);
     virtual std::string         get_transcode_ffmpeg(SrsConfDirective* transcode);
@@ -147,12 +175,6 @@ public:
     virtual int                 get_engine_achannels(SrsConfDirective* engine);
     virtual void                get_engine_aparams(SrsConfDirective* engine, std::vector<std::string>& aparams);
     virtual std::string         get_engine_output(SrsConfDirective* engine);
-    virtual bool                get_deamon();
-    virtual int                 get_max_connections();
-    virtual bool                get_gop_cache(std::string vhost);
-    virtual bool                get_atc(std::string vhost);
-    virtual double              get_queue_length(std::string vhost);
-    virtual SrsConfDirective*   get_forward(std::string vhost);
 // log section
 public:
     virtual bool                get_srs_log_tank_file();
@@ -179,23 +201,6 @@ private:
 public:
     virtual bool                get_http_stream_enabled();
     virtual int                 get_http_stream_listen();
-// others
-public:
-    virtual SrsConfDirective*   get_refer(std::string vhost);
-    virtual SrsConfDirective*   get_refer_play(std::string vhost);
-    virtual SrsConfDirective*   get_refer_publish(std::string vhost);
-    virtual SrsConfDirective*   get_listen();
-    virtual std::string         get_pid_file();
-    virtual int                 get_chunk_size(const std::string& vhost);
-    virtual int                 get_pithy_print_publish();
-    virtual int                 get_pithy_print_forwarder();
-    virtual int                 get_pithy_print_encoder();
-    virtual int                 get_pithy_print_hls();
-    virtual int                 get_pithy_print_play();
-    virtual bool                get_bw_check_enabled(const std::string& vhost);
-    virtual std::string         get_bw_check_key(const std::string& vhost);
-    virtual int                 get_bw_check_interval_ms(const std::string& vhost);
-    virtual int                 get_bw_check_limit_kbps(const std::string& vhost);
 };
 
 /**