[libcamera-devel] [PATCH v2 2/5] utils: raspberrypi: Add a DelayedControls log parser

[Naushir Patuck]

This script will parse log output from the DelayedControls helper, when
enabled with:

LIBCAMERA_LOG_LEVELS=DelayedControls:0

It tabulates all control queuing/writing/getting per frame and warns
about potential issues related to frame delays not being account for, or
writes that are lagging behind or missed.

Run with the following command:

python3 ./delayedctrls_parse.py <logfile>

Signed-off-by: Naushir Patuck <naush at raspberrypi.com>
---
 utils/raspberrypi/delayedctrls_parse.py | 98 +++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 utils/raspberrypi/delayedctrls_parse.py

diff --git a/utils/raspberrypi/delayedctrls_parse.py b/utils/raspberrypi/delayedctrls_parse.py
new file mode 100644
index 000000000000..20c92fb620e6
--- /dev/null
+++ b/utils/raspberrypi/delayedctrls_parse.py
@@ -0,0 +1,98 @@
+import re
+import sys
+import os
+
+if len(sys.argv) != 2:
+    print("Usage: {} <infile>".format(sys.argv[0]))
+    sys.exit()
+
+infile = sys.argv[1]
+insplit = os.path.splitext(infile)
+outfile = insplit[0] + '_parsed' + insplit[1]
+
+frame_re = re.compile('frame (\d+) started')
+
+delays = {'Analogue Gain': 1, 'Exposure': 2, 'Vertical Blanking': 2}
+ctrl_action = {'Write': {}, 'Get': {}, 'Queue': {}, 'No-op': {}}
+ctrl_re = {'Write': re.compile('Setting (.*?) to (\d+) at index (\d+)'),
+           'No-op': re.compile('Queue is empty, (.*?) (.*?) (.*?)'),
+           'Get': re.compile('Reading (.*?) to (\d+) at index (\d+)'),
+           'Queue': re.compile('Queuing (.*?) to (\d+) at index (\d+)')}
+
+frame_num = -1
+
+max_delay = 0
+for k, d in delays.items():
+    if max_delay < d:
+        max_delay = d
+
+with open(infile) as f:
+    lines = f.readlines()
+
+for line in lines:
+    r = frame_re.search(line)
+    if r:
+        frame_num = int(r.group(1))
+
+    for (key, re) in ctrl_re.items():
+        r = re.search(line)
+        if r:
+            ctrl_action[key][(frame_num, r.group(1))] = (r.group(2), r.group(3))
+
+with open(outfile, 'wt') as f:
+    queueIndex = 1
+    f.write('{:<10}{:<15}{:<12}{:<18}{}\n'.format('Frame', 'Action', 'Gain', 'Exposure', 'Vblank'))
+    for frame in range(0, frame_num + 1):
+        for (k, a) in ctrl_action.items():
+            str = '{:<10}{:<10}'.format(frame, k)
+
+            for c in delays.keys():
+                # Tabulate all results
+                str += '{:>5} {:<10}'.format(a[(frame, c)][0] if (frame, c) in a.keys() else '---',
+                                             '[' + (a[(frame, c)][1] if (frame, c) in a.keys() else '-') + ']')
+
+            f.write(str.strip() + '\n')
+
+# Test the write -> get matches the set delay.
+for (frame, c) in ctrl_action['Write'].keys():
+    set_value = ctrl_action['Write'][(frame, c)][0]
+    delay_frame = frame + delays[c]
+    if (delay_frame <= frame_num):
+        if (delay_frame, c) in ctrl_action['Get']:
+            get_value = ctrl_action['Get'][(delay_frame, c)][0]
+            if get_value != set_value:
+                print('Error: {} written at frame {} to value {} != {} at frame {}'
+                      .format(c, frame, set_value, get_value, delay_frame))
+        else:
+            print('Warning: {} written at frame {} to value {} did not get logged on frame {} - dropped frame?'
+                  .format(c, frame, set_value, delay_frame))
+
+# Test the queue -> write matches the set delay.
+for (frame, c) in ctrl_action['Queue'].keys():
+    set_value = ctrl_action['Queue'][(frame, c)][0]
+    delay_frame = frame + max_delay - delays[c] + 1
+    if (delay_frame <= frame_num):
+        if (delay_frame, c) in ctrl_action['Write']:
+            write_value = ctrl_action['Write'][(delay_frame, c)][0]
+            if write_value != set_value:
+                print('Info: {} queued at frame {} to value {} != {} written at frame {}'
+                      ' - lagging behind or double queue on a single frame!'
+                      .format(c, frame, set_value, write_value, delay_frame))
+        else:
+            print('Warning: {} queued at frame {} to value {} did not get logged on frame {} - dropped frame?'
+                  .format(c, frame, set_value, delay_frame))
+
+# Test the get -> write matches the set delay going backwards.
+for (frame, c) in ctrl_action['Get'].keys():
+    get_value = ctrl_action['Get'][(frame, c)][0]
+    delay_frame = frame - delays[c]
+    if (delay_frame >= 6):
+        if (delay_frame, c) in ctrl_action['Write']:
+            write_value = ctrl_action['Write'][(delay_frame, c)][0]
+            if get_value != write_value:
+                print('Info: {} got at frame {} to value {} != {} written at frame {}'
+                      ' - lagging behind or double queue on a single frame!'
+                      .format(c, frame, get_value, write_value, delay_frame))
+        else:
+            print('Warning: {} got at frame {} to value {} did not get written on frame {}'
+                  .format(c, frame, get_value, delay_frame))
-- 
2.25.1