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# Copyright 2014 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import its.image
import its.device
import its.objects
import os.path
import numpy
import pylab
import matplotlib
import matplotlib.pyplot
def main():
"""Test 3A lock + YUV burst (using auto settings).
This is a test that is designed to pass even on limited devices that
don't have MANUAL_SENSOR or PER_FRAME_CONTROLS. (They must be able to
capture bursts with full res @ full frame rate to pass, however).
"""
NAME = os.path.basename(__file__).split(".")[0]
BURST_LEN = 10
SPREAD_THRESH = 0.005
FPS_MAX_DIFF = 2.0
with its.device.ItsSession() as cam:
props = cam.get_camera_properties()
# Converge 3A prior to capture.
cam.do_3a(do_af=False, lock_ae=True, lock_awb=True)
# After 3A has converged, lock AE+AWB for the duration of the test.
req = its.objects.auto_capture_request()
req["android.control.awbLock"] = True
req["android.control.aeLock"] = True
# Capture bursts of YUV shots.
# Get the mean values of a center patch for each.
r_means = []
g_means = []
b_means = []
caps = cam.do_capture([req]*BURST_LEN)
for i,cap in enumerate(caps):
img = its.image.convert_capture_to_rgb_image(cap)
its.image.write_image(img, "%s_frame%d.jpg"%(NAME,i))
tile = its.image.get_image_patch(img, 0.45, 0.45, 0.1, 0.1)
means = its.image.compute_image_means(tile)
r_means.append(means[0])
g_means.append(means[1])
b_means.append(means[2])
# Pass/fail based on center patch similarity.
for means in [r_means, g_means, b_means]:
spread = max(means) - min(means)
print "Patch mean spread", spread
assert(spread < SPREAD_THRESH)
# Also ensure that the burst was at full frame rate.
fmt_code = 0x23
configs = props['android.scaler.streamConfigurationMap']\
['availableStreamConfigurations']
min_duration = None
for cfg in configs:
if cfg['format'] == fmt_code and cfg['input'] == False and \
cfg['width'] == caps[0]["width"] and \
cfg['height'] == caps[0]["height"]:
min_duration = cfg["minFrameDuration"]
assert(min_duration is not None)
tstamps = [c['metadata']['android.sensor.timestamp'] for c in caps]
deltas = [tstamps[i]-tstamps[i-1] for i in range(1,len(tstamps))]
actual_fps = 1.0 / (max(deltas) / 1000000000.0)
max_fps = 1.0 / (min_duration / 1000000000.0)
print "FPS measured %.1f, max advertized %.1f" %(actual_fps, max_fps)
assert(max_fps - FPS_MAX_DIFF <= actual_fps <= max_fps)
if __name__ == '__main__':
main()
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