Revert "for bug#194, open pipe for each connection."

This reverts commit ade81bb2.

@@ -81,7 +81,7 @@ int SrsPipe::active()
     int ret = ERROR_SUCCESS;
     
     int v = 0;
-    if (st_write(write_stfd, &v, sizeof(int), ST_UTIME_NO_TIMEOUT) != sizeof(int)) {
+    if (st_write(read_stfd, &v, sizeof(int), ST_UTIME_NO_TIMEOUT) != sizeof(int)) {
         ret = ERROR_SYSTEM_WRITE_PIPE;
         srs_error("write pipe failed. ret=%d", ret);
         return ret;

@@ -516,12 +516,7 @@ int SrsRtmpConn::playing(SrsSource* source)
     SrsAutoFree(SrsConsumer, consumer);
     srs_verbose("consumer created success.");
     
-    // TODO: FIXME: remove it.
     rtmp->set_recv_timeout(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
-    // disable the timeout.
-    // TODO: FIXME: maybe can use larger timeout?
-    rtmp->set_recv_timeout(ST_UTIME_NO_TIMEOUT);
-    rtmp->set_send_timeout(ST_UTIME_NO_TIMEOUT);
     
     SrsPithyPrint pithy_print(SRS_CONSTS_STAGE_PLAY_USER);
     
@@ -530,30 +525,12 @@ int SrsRtmpConn::playing(SrsSource* source)
     bool user_specified_duration_to_stop = (req->duration > 0);
     int64_t starttime = -1;
     
-    pollfd pds[2];
-    // poll the client incoming fd.
-    pds[0].fd = st_netfd_fileno(stfd);
-    pds[0].events = POLLIN;
-    // poll the consumer queue pipe.
-    pds[1].fd = st_netfd_fileno(consumer->pipe_fd());
-    pds[1].events = POLLIN;
-    
     while (true) {
         // collect elapse for pithy print.
         pithy_print.elapse();
 
-        pds[0].revents = 0;
-        pds[1].revents = 0;
-
-        // wait for packet incoming or data outgoing.
-        if (st_poll(pds, 2, ST_UTIME_NO_TIMEOUT) <= 0) {
-            srs_error("st_poll failed.");
-            break;
-        }
-
-        // packet incoming, read from RTMP.
         // read from client.
-        if (pds[0].revents & POLLIN) {
+        if (true) {
             SrsMessage* msg = NULL;
             ret = rtmp->recv_message(&msg);
             srs_verbose("play loop recv message. ret=%d", ret);
@@ -576,8 +553,6 @@ int SrsRtmpConn::playing(SrsSource* source)
             }
         }
         
-        // data outgoing, sendout packets.
-        if (pds[1].revents & POLLIN) {
         // get messages from consumer.
         int count = 0;
         if ((ret = consumer->dump_packets(msgs.size, msgs.msgs, count)) != ERROR_SUCCESS) {
@@ -623,7 +598,6 @@ int SrsRtmpConn::playing(SrsSource* source)
                 return ret;
             }
         }
-        }
         
         // if duration specified, and exceed it, stop play live.
         // @see: https://github.com/winlinvip/simple-rtmp-server/issues/45