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GUACAMOLE-172: Clarify processing lag calculations.

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This commit is contained in:
Michael Jumper 2016-10-04 13:26:32 -07:00
parent 0ef87c443b
commit 9e6e4e520c
1 changed files with 4 additions and 5 deletions
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9
src/libguac/user-handlers.c
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@ -104,9 +104,8 @@ int __guac_handle_sync(guac_user* user, int argc, char** argv) {
/* Update lag statistics if at least one frame has been rendered */ /* Update lag statistics if at least one frame has been rendered */
if (user->last_frame_duration != 0) { if (user->last_frame_duration != 0) {
/* Approximate processing lag by summing the frame duration deltas */ /* Calculate lag using the previous frame as a baseline */
int processing_lag = user->processing_lag + frame_duration int processing_lag = frame_duration - user->last_frame_duration;
- user->last_frame_duration;
/* Adjust back to zero if cumulative error leads to a negative value */ /* Adjust back to zero if cumulative error leads to a negative value */
if (processing_lag < 0) if (processing_lag < 0)
@ -116,8 +115,8 @@ int __guac_handle_sync(guac_user* user, int argc, char** argv) {
} }
/* Record duration of frame */ /* Record baseline duration of frame by excluding lag */
user->last_frame_duration = frame_duration; user->last_frame_duration = frame_duration - user->processing_lag;
if (user->sync_handler) if (user->sync_handler)
return user->sync_handler(user, timestamp); return user->sync_handler(user, timestamp);