fix #257, refine latency, send when got one+ msgs, 2.0.72

@@ -629,7 +629,14 @@ int SrsRtmpConn::do_playing(SrsSource* source, SrsQueueRecvThread* trd)
         
         // wait for message to incoming.
         // @see https://github.com/winlinvip/simple-rtmp-server/issues/251
-        consumer->wait(SRS_PERF_MW_MIN_MSGS, mw_sleep, realtime);
+        // @see https://github.com/winlinvip/simple-rtmp-server/issues/257
+        if (realtime) {
+            // for realtime, min required msgs is 0, send when got one+ msgs.
+            consumer->wait(0, mw_sleep);
+        } else {
+            // for no-realtime, got some msgs then send.
+            consumer->wait(SRS_PERF_MW_MIN_MSGS, mw_sleep);
+        }
         
         // for send wait time debug
         srs_verbose("send thread now=%"PRId64"us wakeup", srs_update_system_time_ms());

@@ -452,6 +452,9 @@ int SrsConsumer::enqueue(SrsSharedPtrMessage* __msg, bool atc, int tba, int tbv,
     }
     
 #ifdef SRS_PERF_QUEUE_COND_WAIT
+    srs_verbose("enqueue msg, time=%"PRId64", size=%d, duration=%d, waiting=%d, min_msg=%d", 
+        msg->timestamp, msg->size, queue->duration(), mw_waiting, mw_min_msgs);
+        
     // fire the mw when msgs is enough.
     if (mw_waiting) {
         int duration_ms = queue->duration();
@@ -493,7 +496,7 @@ int SrsConsumer::dump_packets(SrsMessageArray* msgs, int& count)
 }
 
 #ifdef SRS_PERF_QUEUE_COND_WAIT
-void SrsConsumer::wait(int nb_msgs, int duration, bool realtime)
+void SrsConsumer::wait(int nb_msgs, int duration)
 {
     mw_min_msgs = nb_msgs;
     mw_duration = duration;
@@ -509,14 +512,8 @@ void SrsConsumer::wait(int nb_msgs, int duration, bool realtime)
     // the enqueue will notify this cond.
     mw_waiting = true;
     
-    // use timeout wait for realtime mode.
-    // @see https://github.com/winlinvip/simple-rtmp-server/issues/257
-    if (realtime) {
-        st_cond_timedwait(mw_wait, duration * 1000);
-    } else {
-        // use cond block wait for high performance mode.
-        st_cond_wait(mw_wait);
-    }
+    // use cond block wait for high performance mode.
+    st_cond_wait(mw_wait);
 }
 #endif
 

@@ -244,9 +244,8 @@ public:
     * wait for messages incomming, atleast nb_msgs and in duration.
     * @param nb_msgs the messages count to wait.
     * @param duration the messgae duration to wait.
-    * @param realtime whether use realtime mode.
     */
-    virtual void wait(int nb_msgs, int duration, bool realtime);
+    virtual void wait(int nb_msgs, int duration);
 #endif
     /**
     * when client send the pause message.

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    71
+#define VERSION_REVISION    72
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"