348 lines
12 KiB
Python
348 lines
12 KiB
Python
# 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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import os
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import os.path
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import sys
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import re
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import json
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import tempfile
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import time
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import unittest
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import subprocess
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import math
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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 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: (Optonal) 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"])
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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 manual_capture_request(
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sensitivity, exp_time, f_distance = 0.0, linear_tonemap=False, props=None):
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"""Return 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
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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
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in this request.
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props: [Optional] the object returned from
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its.device.get_camera_properties(). Must present when
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linear_tonemap 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.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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}
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if linear_tonemap:
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assert(props is not 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.curveRed"] = [0.0,0.0, 1.0,1.0]
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req["android.tonemap.curveGreen"] = [0.0,0.0, 1.0,1.0]
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req["android.tonemap.curveBlue"] = [0.0,0.0, 1.0,1.0]
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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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print "Linear tonemap is not supported"
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assert(False)
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return req
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def auto_capture_request():
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"""Return a capture request with everything set to auto.
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"""
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return {
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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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}
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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 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
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["jpg", "yuv", "raw", "raw10", "raw12"].
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props: the object returned from its.device.get_camera_properties().
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max_size: (Optional) A (w,h) tuple.
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Sizes larger than max_size (either w or h) will be discarded.
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match_ar_size: (Optional) A (w,h) tuple.
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Sizes not matching the aspect ratio of match_ar_size will be
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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 = {"raw":0x20, "raw10":0x25, "raw12":0x26,"yuv":0x23,
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"jpg":0x100, "jpeg":0x100}
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configs = props['android.scaler.streamConfigurationMap']\
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['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 cfg['input'] == False]
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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 = [s for s in out_sizes if
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s[0] <= max_size[0] and s[1] <= max_size[1]]
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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 = [s for s in out_sizes if
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abs(ar - s[0] / float(s[1])) <= AR_TOLERANCE]
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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 set_filter_off_or_fast_if_possible(props, req, available_modes, filter):
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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: the filter key
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Returns:
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Nothing.
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"""
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if props.has_key(available_modes):
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if 0 in props[available_modes]:
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req[filter] = 0
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elif 1 in props[available_modes]:
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req[filter] = 1
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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.device.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(props, req,
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"android.noiseReduction.availableNoiseReductionModes",
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"android.noiseReduction.mode")
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set_filter_off_or_fast_if_possible(props, req,
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"android.colorCorrection.availableAberrationModes",
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"android.colorCorrection.aberrationMode")
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if props.has_key("android.request.availableCharacteristicsKeys"):
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hot_pixel_modes = 393217 in props["android.request.availableCharacteristicsKeys"]
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edge_modes = 196610 in props["android.request.availableCharacteristicsKeys"]
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if props.has_key("android.request.availableRequestKeys"):
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hot_pixel_mode = 393216 in props["android.request.availableRequestKeys"]
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edge_mode = 196608 in props["android.request.availableRequestKeys"]
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if hot_pixel_modes and hot_pixel_mode:
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set_filter_off_or_fast_if_possible(props, req,
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"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 get_fastest_manual_capture_settings(props):
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"""Return a capture request and format spec 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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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_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: the object returned from its.device.get_camera_properties().
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Returns:
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fmt: an output format specification, for the smallest possible yuv
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format 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_yuv_format(props):
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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: the object returned from its.device.get_camera_properties().
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Returns:
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fmt: an output format specification, for the smallest possible yuv
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format for this device.
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"""
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size = get_available_output_sizes("yuv", props)[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_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 zooming possible by the
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camera device.
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"""
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maxz = 1.0
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if props.has_key("android.scaler.availableMaxDigitalZoom"):
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maxz = props["android.scaler.availableMaxDigitalZoom"]
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return maxz
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class __UnitTest(unittest.TestCase):
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"""Run a suite of unit tests on this module.
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"""
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def test_int_to_rational(self):
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"""Unit test for int_to_rational.
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"""
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self.assertEqual(int_to_rational(10),
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{"numerator":10,"denominator":1})
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self.assertEqual(int_to_rational([1,2]),
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[{"numerator":1,"denominator":1},
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{"numerator":2,"denominator":1}])
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def test_float_to_rational(self):
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"""Unit test for float_to_rational.
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"""
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self.assertEqual(float_to_rational(0.5001, 64),
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{"numerator":32, "denominator":64})
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def test_rational_to_float(self):
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"""Unit test for rational_to_float.
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"""
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self.assertTrue(
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abs(rational_to_float({"numerator":32,"denominator":64})-0.5)
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< 0.0001)
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if __name__ == '__main__':
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unittest.main()
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