Bug 973690 - Measure overall entropy over entire capture;r=mchang

src/dashboard/js/common.js

@@ -35,5 +35,7 @@ var measures = {
   'timetostableframe': { 'shortDesc': 'Time to first stable frame (seconds)',
                          'longDesc': 'The time to the first frame of the capture where the image is stable (i.e. mostly unchanging). This is a startup metric that indicates roughly when things have stopped loading. Lower values are better.' },
   'timetoresponse': { 'shortDesc': 'Time to visible response (seconds)',
-                      'longDesc': 'Time between event being first sent to device and an observable response. A long pause may indicate that the application is unresponsive.' }
+                      'longDesc': 'Time between event being first sent to device and an observable response. A long pause may indicate that the application is unresponsive.' },
+  'overallentropy': { 'shortDesc': 'Overall entropy over length of capture',
+                      'longDesc': 'Overall information content in frames of capture. Low values may indicate that some areas of the screen were left blank while the screen was redrawing. Higher values are generally better.' }
 }

src/eideticker/eideticker/metrics.py

@@ -45,6 +45,8 @@ def get_standard_metrics(capture, actions):
         capture, threshold=analysis_props['animation_threshold'])
     metrics['checkerboard'] = videocapture.get_checkerboarding_area_duration(
         capture)
+    metrics['overallentropy'] = videocapture.get_overall_entropy(capture)
+
     if actions:
         # get the delta between the first non-sleep action being fired and
         # there being a visible change

src/videocapture/videocapture/__init__.py

@@ -6,6 +6,6 @@ from controller import CaptureController
 from capture import Capture, BadCapture
 from checkerboard import *
 from framediff import get_framediff_imgarray, get_framediff_image, get_framediff_sums, get_num_unique_frames, get_fps
-from entropy import get_entropy_diffs, get_frame_entropies
+from entropy import get_entropy_diffs, get_overall_entropy, get_frame_entropies
 from stableframe import get_stable_frame, get_stable_frame_time
 from options import OptionParser

src/videocapture/videocapture/entropy.py

@@ -46,6 +46,9 @@ def get_frame_entropies(capture, sobelized=False):
 
     return cache[cachekey]
 
+def get_overall_entropy(capture, sobelized=False):
+    return sum(get_frame_entropies(capture, sobelized=sobelized))
+
 def get_entropy_diffs(capture, num_samples=5, sobelized=False):
     prev_samples = []
     entropies = get_frame_entropies(capture, sobelized=sobelized)