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436 lines
14 KiB
436 lines
14 KiB
# Copyright 2013 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utility functions to create custom capture requests."""
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import math
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import unittest
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def auto_capture_request(linear_tonemap=False, props=None):
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"""Returns a capture request with everything set to auto.
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Args:
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linear_tonemap: [Optional] boolean whether linear tonemap should be used.
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props: [Optional] object from its_session_utils.get_camera_properties().
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Must present when linear_tonemap is True.
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Returns:
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Auto capture request, ready to be passed to the
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its_session_utils.device.do_capture()
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"""
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req = {
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'android.control.mode': 1,
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'android.control.aeMode': 1,
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'android.control.awbMode': 1,
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'android.control.afMode': 1,
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'android.colorCorrection.mode': 1,
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'android.tonemap.mode': 1,
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'android.lens.opticalStabilizationMode': 0,
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'android.control.videoStabilizationMode': 0
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}
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if linear_tonemap:
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if props is None:
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raise AssertionError('props is None with linear_tonemap.')
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# CONTRAST_CURVE mode
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if 0 in props['android.tonemap.availableToneMapModes']:
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req['android.tonemap.mode'] = 0
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req['android.tonemap.curve'] = {
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'red': [0.0, 0.0, 1.0, 1.0], # coordinate pairs: x0, y0, x1, y1
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'green': [0.0, 0.0, 1.0, 1.0],
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'blue': [0.0, 0.0, 1.0, 1.0]
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}
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# GAMMA_VALUE mode
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elif 3 in props['android.tonemap.availableToneMapModes']:
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req['android.tonemap.mode'] = 3
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req['android.tonemap.gamma'] = 1.0
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else:
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raise AssertionError('Linear tonemap is not supported')
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return req
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def manual_capture_request(sensitivity,
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exp_time,
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f_distance=0.0,
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linear_tonemap=False,
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props=None):
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"""Returns a capture request with everything set to manual.
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Uses identity/unit color correction, and the default tonemap curve.
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Optionally, the tonemap can be specified as being linear.
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Args:
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sensitivity: The sensitivity value to populate the request with.
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exp_time: The exposure time, in nanoseconds, to populate the request with.
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f_distance: The focus distance to populate the request with.
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linear_tonemap: [Optional] whether a linear tonemap should be used in this
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request.
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props: [Optional] the object returned from
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its_session_utils.get_camera_properties(). Must present when linear_tonemap
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is True.
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Returns:
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The default manual capture request, ready to be passed to the
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its_session_utils.device.do_capture function.
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"""
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req = {
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'android.control.captureIntent': 6,
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'android.control.mode': 0,
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'android.control.aeMode': 0,
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'android.control.awbMode': 0,
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'android.control.afMode': 0,
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'android.control.effectMode': 0,
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'android.sensor.sensitivity': sensitivity,
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'android.sensor.exposureTime': exp_time,
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'android.colorCorrection.mode': 0,
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'android.colorCorrection.transform':
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int_to_rational([1, 0, 0, 0, 1, 0, 0, 0, 1]),
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'android.colorCorrection.gains': [1, 1, 1, 1],
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'android.lens.focusDistance': f_distance,
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'android.tonemap.mode': 1,
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'android.shading.mode': 1,
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'android.lens.opticalStabilizationMode': 0,
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'android.control.videoStabilizationMode': 0,
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}
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if linear_tonemap:
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if props is None:
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raise AssertionError('props is None.')
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# CONTRAST_CURVE mode
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if 0 in props['android.tonemap.availableToneMapModes']:
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req['android.tonemap.mode'] = 0
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req['android.tonemap.curve'] = {
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'red': [0.0, 0.0, 1.0, 1.0],
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'green': [0.0, 0.0, 1.0, 1.0],
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'blue': [0.0, 0.0, 1.0, 1.0]
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}
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# GAMMA_VALUE mode
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elif 3 in props['android.tonemap.availableToneMapModes']:
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req['android.tonemap.mode'] = 3
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req['android.tonemap.gamma'] = 1.0
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else:
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raise AssertionError('Linear tonemap is not supported')
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return req
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def get_available_output_sizes(fmt, props, max_size=None, match_ar_size=None):
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"""Return a sorted list of available output sizes for a given format.
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Args:
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fmt: the output format, as a string in ['jpg', 'yuv', 'raw', 'raw10',
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'raw12', 'y8'].
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props: the object returned from its_session_utils.get_camera_properties().
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max_size: (Optional) A (w,h) tuple.Sizes larger than max_size (either w or h)
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will be discarded.
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match_ar_size: (Optional) A (w,h) tuple.Sizes not matching the aspect ratio
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of match_ar_size will be discarded.
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Returns:
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A sorted list of (w,h) tuples (sorted large-to-small).
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"""
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ar_tolerance = 0.03
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fmt_codes = {
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'raw': 0x20,
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'raw10': 0x25,
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'raw12': 0x26,
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'yuv': 0x23,
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'jpg': 0x100,
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'jpeg': 0x100,
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'y8': 0x20203859
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}
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configs = props[
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'android.scaler.streamConfigurationMap']['availableStreamConfigurations']
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fmt_configs = [cfg for cfg in configs if cfg['format'] == fmt_codes[fmt]]
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out_configs = [cfg for cfg in fmt_configs if not cfg['input']]
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out_sizes = [(cfg['width'], cfg['height']) for cfg in out_configs]
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if max_size:
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out_sizes = [
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s for s in out_sizes if s[0] <= max_size[0] and s[1] <= max_size[1]
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]
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if match_ar_size:
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ar = match_ar_size[0] / float(match_ar_size[1])
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out_sizes = [
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s for s in out_sizes if abs(ar - s[0] / float(s[1])) <= ar_tolerance
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]
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out_sizes.sort(reverse=True, key=lambda s: s[0]) # 1st pass, sort by width
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out_sizes.sort(reverse=True, key=lambda s: s[0] * s[1]) # sort by area
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return out_sizes
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def float_to_rational(f, denom=128):
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"""Function to convert Python floats to Camera2 rationals.
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Args:
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f: python float or list of floats.
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denom: (Optional) the denominator to use in the output rationals.
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Returns:
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Python dictionary or list of dictionaries representing the given
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float(s) as rationals.
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"""
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if isinstance(f, list):
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return [{'numerator': math.floor(val*denom+0.5), 'denominator': denom}
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for val in f]
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else:
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return {'numerator': math.floor(f*denom+0.5), 'denominator': denom}
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def rational_to_float(r):
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"""Function to convert Camera2 rational objects to Python floats.
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Args:
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r: Rational or list of rationals, as Python dictionaries.
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Returns:
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Float or list of floats.
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"""
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if isinstance(r, list):
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return [float(val['numerator']) / float(val['denominator']) for val in r]
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else:
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return float(r['numerator']) / float(r['denominator'])
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def get_fastest_manual_capture_settings(props):
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"""Returns a capture request and format spec for the fastest manual capture.
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Args:
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props: the object returned from its_session_utils.get_camera_properties().
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Returns:
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Two values, the first is a capture request, and the second is an output
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format specification, for the fastest possible (legal) capture that
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can be performed on this device (with the smallest output size).
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"""
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fmt = 'yuv'
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size = get_available_output_sizes(fmt, props)[-1]
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out_spec = {'format': fmt, 'width': size[0], 'height': size[1]}
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s = min(props['android.sensor.info.sensitivityRange'])
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e = min(props['android.sensor.info.exposureTimeRange'])
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req = manual_capture_request(s, e)
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turn_slow_filters_off(props, req)
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return req, out_spec
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def get_fastest_auto_capture_settings(props):
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"""Returns a capture request and format spec for the fastest auto capture.
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Args:
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props: the object returned from its_session_utils.get_camera_properties().
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Returns:
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Two values, the first is a capture request, and the second is an output
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format specification, for the fastest possible (legal) capture that
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can be performed on this device (with the smallest output size).
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"""
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fmt = 'yuv'
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size = get_available_output_sizes(fmt, props)[-1]
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out_spec = {'format': fmt, 'width': size[0], 'height': size[1]}
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req = auto_capture_request()
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turn_slow_filters_off(props, req)
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return req, out_spec
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def fastest_auto_capture_request(props):
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"""Return an auto capture request for the fastest capture.
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Args:
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props: the object returned from its.device.get_camera_properties().
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Returns:
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A capture request with everything set to auto and all filters that
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may slow down capture set to OFF or FAST if possible
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"""
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req = auto_capture_request()
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turn_slow_filters_off(props, req)
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return req
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def turn_slow_filters_off(props, req):
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"""Turn filters that may slow FPS down to OFF or FAST in input request.
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This function modifies the request argument, such that filters that may
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reduce the frames-per-second throughput of the camera device will be set to
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OFF or FAST if possible.
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Args:
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props: the object returned from its_session_utils.get_camera_properties().
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req: the input request.
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Returns:
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Nothing.
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"""
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set_filter_off_or_fast_if_possible(
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props, req, 'android.noiseReduction.availableNoiseReductionModes',
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'android.noiseReduction.mode')
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set_filter_off_or_fast_if_possible(
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props, req, 'android.colorCorrection.availableAberrationModes',
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'android.colorCorrection.aberrationMode')
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if 'camera.characteristics.keys' in props:
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chars_keys = props['camera.characteristics.keys']
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hot_pixel_modes = 'android.hotPixel.availableHotPixelModes' in chars_keys
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edge_modes = 'android.edge.availableEdgeModes' in chars_keys
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if 'camera.characteristics.requestKeys' in props:
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req_keys = props['camera.characteristics.requestKeys']
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hot_pixel_mode = 'android.hotPixel.mode' in req_keys
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edge_mode = 'android.edge.mode' in req_keys
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if hot_pixel_modes and hot_pixel_mode:
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set_filter_off_or_fast_if_possible(
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props, req, 'android.hotPixel.availableHotPixelModes',
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'android.hotPixel.mode')
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if edge_modes and edge_mode:
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set_filter_off_or_fast_if_possible(props, req,
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'android.edge.availableEdgeModes',
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'android.edge.mode')
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def set_filter_off_or_fast_if_possible(props, req, available_modes, filter_key):
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"""Check and set controlKey to off or fast in req.
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Args:
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props: the object returned from its.device.get_camera_properties().
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req: the input request. filter will be set to OFF or FAST if possible.
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available_modes: the key to check available modes.
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filter_key: the filter key
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Returns:
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Nothing.
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"""
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if available_modes in props:
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if 0 in props[available_modes]:
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req[filter_key] = 0
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elif 1 in props[available_modes]:
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req[filter_key] = 1
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def int_to_rational(i):
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"""Function to convert Python integers to Camera2 rationals.
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Args:
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i: Python integer or list of integers.
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Returns:
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Python dictionary or list of dictionaries representing the given int(s)
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as rationals with denominator=1.
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"""
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if isinstance(i, list):
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return [{'numerator': val, 'denominator': 1} for val in i]
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else:
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return {'numerator': i, 'denominator': 1}
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def get_largest_yuv_format(props, match_ar=None):
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"""Return a capture request and format spec for the largest yuv size.
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Args:
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props: object returned from camera_properties_utils.get_camera_properties().
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match_ar: (Optional) a (w, h) tuple. Aspect ratio to match during search.
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Returns:
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fmt: an output format specification for the largest possible yuv format
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for this device.
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"""
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size = get_available_output_sizes('yuv', props, match_ar_size=match_ar)[0]
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fmt = {'format': 'yuv', 'width': size[0], 'height': size[1]}
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return fmt
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def get_smallest_yuv_format(props, match_ar=None):
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"""Return a capture request and format spec for the smallest yuv size.
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Args:
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props: object returned from camera_properties_utils.get_camera_properties().
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match_ar: (Optional) a (w, h) tuple. Aspect ratio to match during search.
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Returns:
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fmt: an output format specification for the smallest possible yuv format
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for this device.
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"""
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size = get_available_output_sizes('yuv', props, match_ar_size=match_ar)[-1]
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fmt = {'format': 'yuv', 'width': size[0], 'height': size[1]}
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return fmt
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def get_largest_jpeg_format(props, match_ar=None):
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"""Return a capture request and format spec for the largest jpeg size.
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Args:
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props: object returned from camera_properties_utils.get_camera_properties().
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match_ar: (Optional) a (w, h) tuple. Aspect ratio to match during search.
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Returns:
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fmt: an output format specification for the largest possible jpeg format
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for this device.
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"""
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size = get_available_output_sizes('jpeg', props, match_ar_size=match_ar)[0]
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fmt = {'format': 'jpeg', 'width': size[0], 'height': size[1]}
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return fmt
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def get_max_digital_zoom(props):
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"""Returns the maximum amount of zooming possible by the camera device.
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Args:
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props: the object returned from its.device.get_camera_properties().
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Return:
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A float indicating the maximum amount of zoom possible by the camera device.
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"""
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max_z = 1.0
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if 'android.scaler.availableMaxDigitalZoom' in props:
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max_z = props['android.scaler.availableMaxDigitalZoom']
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return max_z
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class CaptureRequestUtilsTest(unittest.TestCase):
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"""Unit tests for this module.
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Ensures rational number conversion dicts are created properly.
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"""
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_FLOAT_HALF = 0.5
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# No immutable container: frozendict requires package install on partner host
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_RATIONAL_HALF = {'numerator': 32, 'denominator': 64}
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def test_float_to_rational(self):
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"""Unit test for float_to_rational."""
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self.assertEqual(
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float_to_rational(self._FLOAT_HALF, 64), self._RATIONAL_HALF)
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def test_rational_to_float(self):
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"""Unit test for rational_to_float."""
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self.assertTrue(
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math.isclose(rational_to_float(self._RATIONAL_HALF),
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self._FLOAT_HALF, abs_tol=0.0001))
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def test_int_to_rational(self):
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"""Unit test for int_to_rational."""
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rational_10 = {'numerator': 10, 'denominator': 1}
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rational_1 = {'numerator': 1, 'denominator': 1}
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rational_2 = {'numerator': 2, 'denominator': 1}
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# Simple test
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self.assertEqual(int_to_rational(10), rational_10)
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# Handle list entries
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self.assertEqual(
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int_to_rational([1, 2]), [rational_1, rational_2])
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if __name__ == '__main__':
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unittest.main()
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