Fix 2673 (#2675)

* Change MaxFPS to DECIMAL(5,3) to handle values like 1/60 = 0.017

* When fps < 1 we may need to wait longer than 10s.  Also, we cannot sleep for a long time, because we may need to send a keep alive or check the command queue. So limit the sleep to 1s

* Bump version

* Update MaxFPS to Decimal(5,3)

* Fix missing ;

db/zm_create.sql.in

@@ -413,7 +413,7 @@ CREATE TABLE `MonitorPresets` (
   `Width` smallint(5) unsigned default NULL,
   `Height` smallint(5) unsigned default NULL,
   `Palette` int(10) unsigned default NULL,
-  `MaxFPS` decimal(5,2) default NULL,
+  `MaxFPS` decimal(5,3) default NULL,
   `Controllable` tinyint(3) unsigned NOT NULL default '0',
   `ControlId` varchar(16) default NULL,
   `ControlDevice` varchar(255) default NULL,

db/zm_update-1.33.13.sql

@@ -0,0 +1,6 @@
+--
+-- Add primary keys for Logs and Stats tables
+--
+
+SELECT "Modifying Monitors MaxFPS to DECIMAL(5,3)";
+ALTER TABLE `Monitors` MODIFY `MaxFPS` decimal(5,3) default NULL;

src/zm_monitorstream.cpp

@@ -27,6 +27,8 @@
 #include <arpa/inet.h>
 #include <glob.h>
 
+const int MAX_SLEEP_USEC=1000000; // 1 sec
+
 bool MonitorStream::checkSwapPath(const char *path, bool create_path) {
 
   struct stat stat_buf;
@@ -425,11 +427,12 @@ bool MonitorStream::sendFrame(Image *image, struct timeval *timestamp) {
     int frameSendTime = tvDiffMsec(frameStartTime, frameEndTime);
     if ( frameSendTime > 1000/maxfps ) {
       maxfps /= 1.5;
-      Warning("Frame send time %d msec too slow, throttling maxfps to %.2f", frameSendTime, maxfps);
+      Warning("Frame send time %d msec too slow, throttling maxfps to %.2f",
+          frameSendTime, maxfps);
     }
   }
   last_frame_sent = TV_2_FLOAT(now);
-  return( true );
+  return true;
 } // end bool MonitorStream::sendFrame( Image *image, struct timeval *timestamp )
 
 void MonitorStream::runStream() {
@@ -515,6 +518,23 @@ void MonitorStream::runStream() {
   } // end if connkey  & playback_buffer
 
   float max_secs_since_last_sent_frame = 10.0; //should be > keep alive amount (5 secs)
+  // if MaxFPS < 0 as in 1/60 = 0.017 then we won't get another frame for 60 sec.
+  double capture_fps = monitor->GetFPS();
+  double capture_max_fps = monitor->GetCaptureMaxFPS();
+  if ( capture_max_fps && ( capture_fps > capture_max_fps ) ) {
+    Debug(1, "Using %.3f for fps instead of current fps %.3f", capture_max_fps, capture_fps);
+    capture_fps = capture_max_fps;
+  }
+  
+  if ( capture_fps < 1 ) {
+    max_secs_since_last_sent_frame = 10/capture_fps;
+    Debug(1, "Adjusting max_secs_since_last_sent_frame to %.2f from current fps %.2f",
+        max_secs_since_last_sent_frame, monitor->GetFPS());
+  } else {
+    Debug(1, "Not Adjusting max_secs_since_last_sent_frame to %.2f from current fps %.2f",
+        max_secs_since_last_sent_frame, monitor->GetFPS());
+  }
+
   while ( !zm_terminate ) {
     bool got_command = false;
     if ( feof(stdout) ) {
@@ -638,7 +658,8 @@ void MonitorStream::runStream() {
       // have a new image to send
       int index = monitor->shared_data->last_write_index % monitor->image_buffer_count; // % shouldn't be neccessary
       last_read_index = monitor->shared_data->last_write_index;
-      Debug( 2, "index: %d: frame_mod: %d frame count: %d paused(%d) delayed(%d)", index, frame_mod, frame_count, paused, delayed );
+      Debug(2, "index: %d: frame_mod: %d frame count: %d paused(%d) delayed(%d)",
+          index, frame_mod, frame_count, paused, delayed );
       if ( (frame_mod == 1) || ((frame_count%frame_mod) == 0) ) {
         if ( !paused && !delayed ) {
           // Send the next frame
@@ -655,11 +676,12 @@ void MonitorStream::runStream() {
 
           temp_read_index = temp_write_index;
         } else {
+          Debug(2, "Paused %d, delayed %d", paused, delayed);
           double actual_delta_time = TV_2_FLOAT(now) - last_frame_sent;
           if ( actual_delta_time > 5 ) {
             if ( paused_image ) {
               // Send keepalive
-              Debug(2, "Sending keepalive frame ");
+              Debug(2, "Sending keepalive frame because delta time %.2f > 5", actual_delta_time);
               // Send the next frame
               if ( !sendFrame(paused_image, &paused_timestamp) )
                 zm_terminate = true;
@@ -698,11 +720,17 @@ void MonitorStream::runStream() {
       } // end if buffered playback
       frame_count++;
     } else {
-      Debug(4,"Waiting for capture last_write_index=%u", monitor->shared_data->last_write_index);
+      Debug(3, "Waiting for capture last_write_index=%u", monitor->shared_data->last_write_index);
     } // end if ( (unsigned int)last_read_index != monitor->shared_data->last_write_index ) 
 
     unsigned long sleep_time = (unsigned long)((1000000 * ZM_RATE_BASE)/((base_fps?base_fps:1)*abs(replay_rate*2)));
-    Debug(4, "Sleeping for (%d)", sleep_time);
+    Debug(3, "Sleeping for (%d)", sleep_time);
+
+    if ( sleep_time > MAX_SLEEP_USEC ) {
+      // Shouldn't sleep for long because we need to check command queue, etc.
+      sleep_time = MAX_SLEEP_USEC;
+    }
+    Debug(3, "Sleeping for %dus", sleep_time);
     usleep(sleep_time);
     if ( ttl ) {
       if ( (now.tv_sec - stream_start_time) > ttl ) {
@@ -713,9 +741,15 @@ void MonitorStream::runStream() {
     if ( ! last_frame_sent ) {
       // If we didn't capture above, because frame_mod was bad? Then last_frame_sent will not have a value.
       last_frame_sent = now.tv_sec;
-      Warning( "no last_frame_sent.  Shouldn't happen. frame_mod was (%d) frame_count (%d) ", frame_mod, frame_count );
+      Warning("no last_frame_sent.  Shouldn't happen. frame_mod was (%d) frame_count (%d) ",
-    } else if ( (!paused) && ( (TV_2_FLOAT( now ) - last_frame_sent) > max_secs_since_last_sent_frame ) ) {
+          frame_mod, frame_count);
-      Error( "Terminating, last frame sent time %f secs more than maximum of %f", TV_2_FLOAT( now ) - last_frame_sent, max_secs_since_last_sent_frame );
+    } else if (
+        (!paused)
+        &&
+        ( (TV_2_FLOAT(now) - last_frame_sent) > max_secs_since_last_sent_frame )
+        ) {
+      Error("Terminating, last frame sent time %f secs more than maximum of %f",
+          TV_2_FLOAT(now) - last_frame_sent, max_secs_since_last_sent_frame);
       break;
     }
   } // end while

version

@@ -1 +1 @@
-1.33.12
+1.33.13