Keep Android wake deadlines absolute and report causes of the largest video gaps

src/call/call_video_playout.c

@@ -42,14 +42,17 @@ static void report(struct call_video_playout *p, int64_t now) {
     if (now - p->report_us < 1000000) return;
     DEBUG_DEBUG(DEBUG_CATEGORY_CALL,
         "video playout call=%llu interval_us=%lld shown=%u drop_late=%u drop_schedule=%u drop_order=%u "
-        "cadence_us=%lld..%lld av_us=%lld..%lld dispatch_max_us=%lld data_shift_us=%lld audio_wait=%u clock_wait=%u",
+        "cadence_us=%lld..%lld gap_pts_us=%lld gap_rx_us=%lld gap_dispatch_us=%lld "
+        "av_us=%lld..%lld dispatch_max_us=%lld data_shift_us=%lld audio_wait=%u clock_wait=%u",
         (unsigned long long)p->call_id, (long long)(now - p->report_us), p->shown, p->late, p->skipped, p->order,
         (long long)(p->interval_min == INT64_MAX ? 0 : p->interval_min), (long long)p->interval_max,
+        (long long)p->gap_pts, (long long)p->gap_received, (long long)p->gap_dispatch,
         (long long)(p->shown ? p->av_min : 0), (long long)(p->shown ? p->av_max : 0),
         (long long)p->dispatch_max, (long long)p->data_shift, p->audio_wait, p->clock_wait);
     p->report_us = now; p->shown = p->late = p->skipped = p->order = p->audio_wait = p->clock_wait = 0;
     p->interval_min = p->av_min = INT64_MAX; p->av_max = INT64_MIN;
     p->interval_max = p->dispatch_max = p->data_shift = 0;
+    p->gap_pts = p->gap_received = p->gap_dispatch = 0;
 }
 
 enum call_video_playout_action call_video_playout_poll(struct call_video_playout *p,
@@ -94,9 +97,12 @@ enum call_video_playout_action call_video_playout_poll(struct call_video_playout
         if (p->last_show_us) {
             int64_t gap = now - p->last_show_us;
             if (gap < p->interval_min) p->interval_min = gap;
-            if (gap > p->interval_max) p->interval_max = gap;
+            if (gap > p->interval_max) {
+                p->interval_max = gap; p->gap_pts = f->pts_us - p->last_show_pts;
+                p->gap_received = f->received_us - p->last_received; p->gap_dispatch = now - deadline;
+            }
         }
-        p->last_show_us = now; p->shown++;
+        p->last_show_us = now; p->last_show_pts = f->pts_us; p->last_received = f->received_us; p->shown++;
     }
     return action;
 }

src/call/call_video_playout.h

@@ -21,6 +21,7 @@ struct call_video_playout {
     int anchored, audio_valid;
     int64_t last_pts, last_deadline, deadline_us;
     int64_t report_us, last_show_us, interval_min, interval_max, av_min, av_max, dispatch_max, data_shift;
+    int64_t last_show_pts, last_received, gap_pts, gap_received, gap_dispatch;
     unsigned shown, late, skipped, order, audio_wait, clock_wait;
 };