add atc_auto to disable or enable auto detect atc

@@ -223,6 +223,12 @@ vhost atc.srs.com {
     #
     # default: off
     atc             on;
+    # whether enable the auto atc,
+    # if enabled, detect the bravo_atc="true" in onMetaData packet,
+    # set atc to on if matched.
+    # always ignore the onMetaData if atc_auto is off.
+    # default: on
+    atc_auto        on;
 }
 
 # vhost for bandwidth check

@@ -1654,7 +1654,7 @@ bool SrsConfig::get_atc(string vhost)
     SrsConfDirective* conf = get_vhost(vhost);
 
     if (!conf) {
-        return true;
+        return false;
     }
     
     conf = conf->get("atc");
@@ -1665,6 +1665,22 @@ bool SrsConfig::get_atc(string vhost)
     return false;
 }
 
+bool SrsConfig::get_atc_auto(string vhost)
+{
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return true;
+    }
+    
+    conf = conf->get("atc_auto");
+    if (conf && conf->arg0() == "off") {
+        return false;
+    }
+    
+    return true;
+}
+
 double SrsConfig::get_queue_length(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);

@@ -180,6 +180,7 @@ public:
     virtual SrsConfDirective*   get_vhost_on_dvr_hss_reap_flv(std::string vhost);
     virtual bool                get_gop_cache(std::string vhost);
     virtual bool                get_atc(std::string vhost);
+    virtual bool                get_atc_auto(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);

@@ -822,11 +822,13 @@ int SrsSource::on_meta_data(SrsMessage* msg, SrsOnMetaDataPacket* metadata)
         }
     }
     
-    // if bravo-atc, open atc for vhost.
+    // if allow atc_auto and bravo-atc detected, open atc for vhost.
     atc = _srs_config->get_atc(_req->vhost);
-    if ((prop = metadata->metadata->get_property("bravo_atc")) != NULL) {
-        if (prop->is_string() && prop->to_str() == "true") {
-            atc = true;
+    if (_srs_config->get_atc_auto(_req->vhost)) {
+        if ((prop = metadata->metadata->get_property("bravo_atc")) != NULL) {
+            if (prop->is_string() && prop->to_str() == "true") {
+                atc = true;
+            }
         }
     }
     

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "85"
+#define VERSION_REVISION "86"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "srs"