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How to use previewing method in fMBT

Best Python code snippet using fMBT_python
test_attr.py
Source:test_attr.py
1# vim: set et sw=4 sts=4 fileencoding=utf-8:2#3# Python camera library for the Rasperry-Pi camera module4# Copyright (c) 2013-2015 Dave Jones <dave@waveform.org.uk>5#6# Redistribution and use in source and binary forms, with or without7# modification, are permitted provided that the following conditions are met:8#9#     * Redistributions of source code must retain the above copyright10#       notice, this list of conditions and the following disclaimer.11#     * Redistributions in binary form must reproduce the above copyright12#       notice, this list of conditions and the following disclaimer in the13#       documentation and/or other materials provided with the distribution.14#     * Neither the name of the copyright holder nor the15#       names of its contributors may be used to endorse or promote products16#       derived from this software without specific prior written permission.17#18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"19# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE20# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE21# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE22# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR23# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF24# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS25# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN26# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)27# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE28# POSSIBILITY OF SUCH DAMAGE.29from __future__ import (30    unicode_literals,31    print_function,32    division,33    absolute_import,34    )35# Make Py2's str equivalent to Py3's36str = type('')37import picamera38from picamera.color import Color39import pytest40import time41from fractions import Fraction42from decimal import Decimal43def numeric_attr(camera, attr, value_min, value_max, step=1):44    save_value = getattr(camera, attr)45    try:46        for value in range(value_min, value_max + 1, step):47            setattr(camera, attr, value)48            assert value == getattr(camera, attr)49        with pytest.raises(picamera.PiCameraError):50            setattr(camera, attr, value_min - 1)51        with pytest.raises(picamera.PiCameraError):52            setattr(camera, attr, value_max + 1)53    finally:54        setattr(camera, attr, save_value)55def keyword_attr(camera, attr, values):56    save_value = getattr(camera, attr)57    try:58        for value in values:59            setattr(camera, attr, value)60            assert value == getattr(camera, attr)61        with pytest.raises(picamera.PiCameraError):62            setattr(camera, attr, 'foobar')63    finally:64        setattr(camera, attr, save_value)65def boolean_attr(camera, attr):66    save_value = getattr(camera, attr)67    try:68        setattr(camera, attr, False)69        assert not getattr(camera, attr)70        setattr(camera, attr, True)71        assert getattr(camera, attr)72    finally:73        setattr(camera, attr, save_value)74def test_analog_gain(camera, previewing):75    # Just test the read-only property returns something sensible76    assert 0.0 <= camera.analog_gain <= 8.077def test_annotate_text(camera, previewing):78    save_value = camera.annotate_text79    try:80        camera.annotate_text = ''81        assert camera.annotate_text == ''82        camera.annotate_text = 'foo'83        assert camera.annotate_text == u'foo'84        camera.annotate_text = 'foo bar baz quux xyzzy'85        assert camera.annotate_text == u'foo bar baz quux xyzzy'86        with pytest.raises(picamera.PiCameraValueError):87            camera.annotate_text = ('abcd' * 64) + 'a'88        with pytest.raises(picamera.PiCameraValueError):89            camera.annotate_text = 'Oh lÃ¡ lÃ¡'90    finally:91        camera.annotate_text = save_value92def test_annotate_text_size(camera, previewing):93    numeric_attr(camera, 'annotate_text_size', 6, 160)94def test_annotate_foreground(camera, previewing):95    save_value = camera.annotate_foreground96    try:97        camera.annotate_foreground = Color('black')98        camera.annotate_foreground = Color('white')99        camera.annotate_foreground = Color.from_yuv(0.5, 0, 0)100        with pytest.raises(picamera.PiCameraValueError):101            camera.annotate_foreground = 'white'102        with pytest.raises(picamera.PiCameraValueError):103            camera.annotate_foreground = 0104        with pytest.raises(picamera.PiCameraValueError):105            camera.annotate_foreground = None106    finally:107        camera.annotate_foreground = save_value108def test_annotate_background(camera, previewing):109    save_value = camera.annotate_background110    try:111        camera.annotate_background = Color('black')112        camera.annotate_background = Color('white')113        camera.annotate_background = Color(128, 128, 0)114        with pytest.raises(picamera.PiCameraValueError):115            camera.annotate_background = 'black'116        with pytest.raises(picamera.PiCameraValueError):117            camera.annotate_background = 0118        camera.annotate_background = None119    finally:120        camera.annotate_background = save_value121def test_annotate_frame_num(camera, previewing):122    boolean_attr(camera, 'annotate_frame_num')123def test_awb_mode(camera, previewing):124    keyword_attr(camera, 'awb_mode', camera.AWB_MODES)125def test_awb_gains(camera, previewing):126    def check_gains(red, blue):127        # The camera needs some time to let the AWB gains adjust128        time.sleep(0.4)129        # The gains we get back aren't absolutely precise, but they're130        # close (+/- 0.05)131        r, b = camera.awb_gains132        assert red - 0.05 <= r <= red + 0.05133        assert blue - 0.05 <= b <= blue + 0.05134    save_mode = camera.awb_mode135    try:136        # Can't use numeric_attr here as awb_mode is a (red, blue) tuple137        camera.awb_mode = 'off'138        for i in range (1, 9):139            camera.awb_gains = i140            check_gains(i, i)141        camera.awb_gains = 1.5142        check_gains(1.5, 1.5)143        camera.awb_gains = (0.5, 0.5)144        check_gains(0.5, 0.5)145        camera.awb_gains = (Fraction(16, 10), 1.9)146        check_gains(1.6, 1.9)147        with pytest.raises(picamera.PiCameraError):148            camera.awb_gains = Fraction(20, 1)149    finally:150        camera.awb_mode = save_mode151def test_brightness(camera, previewing):152    numeric_attr(camera, 'brightness', 0, 100)153def test_color_effects(camera, previewing):154    save_value = camera.color_effects155    try:156        camera.color_effects = None157        assert camera.color_effects is None158        camera.color_effects = (128, 128)159        assert camera.color_effects == (128, 128)160        camera.color_effects = (0, 255)161        assert camera.color_effects == (0, 255)162        camera.color_effects = (255, 0)163        assert camera.color_effects == (255, 0)164        with pytest.raises(picamera.PiCameraError):165            camera.color_effects = (-1, -1)166        with pytest.raises(picamera.PiCameraError):167            camera.color_effects = (0, 300)168    finally:169        camera.color_effects = save_value170def test_contrast(camera, previewing):171    numeric_attr(camera, 'contrast', -100, 100)172def test_digital_gain(camera, previewing):173    # Just test the read-only property returns something sensible174    assert 0.0 <= camera.digital_gain <= 8.0175def test_exposure_compensation(camera, previewing):176    numeric_attr(camera, 'exposure_compensation', -25, 25)177def test_exposure_mode(camera, previewing):178    keyword_attr(camera, 'exposure_mode', camera.EXPOSURE_MODES)179def test_flash_mode(camera, previewing):180    keyword_attr(camera, 'flash_mode', camera.FLASH_MODES)181def test_image_effects1(camera, previewing):182    valid_combinations = {183        'solarize': [184            (False, 128, 128, 128, 0),185            (True, 128, 128, 128, 0),186            (False, 16, 192, 0, 0),187            (128, 128, 128, 0),188            0,189            ],190        'colorbalance': [191            (0, 1, 1, 1, 0, 0),192            (0, 0.5, 0.5, 0.5),193            (0.451, 1, 1),194            (0, 1.0, 0.5, 0.75, -64, 64),195            ],196        'colorpoint': [0, (1,), (2,), 3],197        'colorswap':  [0, (1,)],198        'posterise':  [2, (30,), 16],199        'blur':       [1, (2,)],200        'film':       [(0, 0, 0), (50, 128, 128)],201        'watercolor': [(), (128, 128)],202        }203    try:204        for effect in camera.IMAGE_EFFECTS:205            camera.image_effect = effect206            assert camera.image_effect_params is None207            if effect in valid_combinations:208                for params in valid_combinations[effect]:209                    camera.image_effect_params = params210                    assert camera.image_effect_params == params211    finally:212        camera.image_effect = 'none'213def test_image_effects2(camera, previewing):214    invalid_combinations = {215        'solarize':     [(3, 3, 3), ()],216        'colorpoint':   [(1, 1), ()],217        'colorbalance': [(1,), False, ()],218        'colorswap':    [(1, 1), ()],219        'posterise':    [(1, 1), ()],220        'blur':         [(1, 1), ()],221        'film':         [(1, 1), (), (12, 2, 3, 4)],222        'watercolor':   [1, (1, 2, 3)],223        }224    try:225        for effect, params_sets in invalid_combinations.items():226            camera.image_effect = effect227            for params in params_sets:228                with pytest.raises(picamera.PiCameraValueError):229                    camera.image_effect_params = params230    finally:231        camera.image_effect = 'none'232def test_drc_strength(camera, previewing):233    keyword_attr(camera, 'drc_strength', camera.DRC_STRENGTHS)234def test_meter_mode(camera, previewing):235    keyword_attr(camera, 'meter_mode', camera.METER_MODES)236def test_rotation(camera, previewing):237    save_value = camera.rotation238    try:239        for value in range(0, 360):240            camera.rotation = value241            assert camera.rotation == [0, 90, 180, 270][value // 90]242        camera.rotation = 360243        assert camera.rotation == 0244    finally:245        camera.rotation = save_value246def test_saturation(camera, previewing):247    numeric_attr(camera, 'saturation', -100, 100)248def test_sharpness(camera, previewing):249    numeric_attr(camera, 'sharpness', -100, 100)250def test_iso(camera, previewing):251    numeric_attr(camera, 'iso', 0, 1600)252def test_video_stabilization(camera, previewing):253    boolean_attr(camera, 'video_stabilization')254def test_video_denoise(camera, previewing):255    boolean_attr(camera, 'video_denoise')256def test_image_denoise(camera, previewing):257    boolean_attr(camera, 'image_denoise')258def test_still_stats(camera, previewing):259    boolean_attr(camera, 'still_stats')260def test_hflip(camera, previewing):261    boolean_attr(camera, 'hflip')262def test_vflip(camera, previewing):263    boolean_attr(camera, 'vflip')264def test_shutter_speed(camera, previewing):265    # Shutter speed is now clamped by frame-rate; set frame-rate to something266    # nice and low to enable the test to run correctly267    save_framerate = camera.framerate268    camera.framerate = 1269    try:270        # When setting shutter speed manually, ensure the actual shutter speed271        # is within 50usec of the specified amount (the value+1 accounts for272        # a rounding error)273        for value in range(0, 700000, 50):274            camera.shutter_speed = value275            assert (value - 50) <= camera.shutter_speed <= (value + 1)276        # Test the shutter speed clamping by framerate277        camera.framerate = 30278        assert 33000 <= camera.shutter_speed <= 33333279    finally:280        camera.framerate = save_framerate281        camera.shutter_speed = 0282def test_zoom(camera, previewing):283    save_zoom = camera.zoom284    try:285        camera.zoom = (0.0, 0.0, 1.0, 1.0)286        assert camera.zoom == (0.0, 0.0, 1.0, 1.0)287        camera.zoom = (0.2, 0.2, 0.6, 0.6)288        assert camera.zoom == (0.2, 0.2, 0.6, 0.6)289        camera.zoom = (0.1, 0.1, 0.8, 0.8)290        # 0.1 doesn't quite make the round trip...291        assert camera.zoom == (int(0.1*65535.0)/65535.0, int(0.1*65535.0)/65535.0, 0.8, 0.8)292    finally:293        camera.zoom = save_zoom294# XXX The preview properties work, but don't return correct values unless the295# preview is actually running; if this isn't expected behaviour then we should296# xfail these tests instead of simply testing for previewing...297def test_preview_alpha(camera, previewing):298    if previewing:299        numeric_attr(camera.preview, 'alpha', 0, 255)300def test_preview_layer(camera, previewing):301    if previewing:302        numeric_attr(camera.preview, 'layer', 0, 255)303def test_preview_fullscreen(camera, previewing):304    if previewing:305        boolean_attr(camera.preview, 'fullscreen')306def test_preview_window(camera, previewing):307    if previewing:308        camera.preview.window = (0, 0, 320, 240)309        assert camera.preview.window == (0, 0, 320, 240)310        camera.preview.window = (1280-320, 720-240, 320, 240)311        assert camera.preview.window == (1280-320, 720-240, 320, 240)312        camera.preview.window = (0, 0, 640, 360)313        assert camera.preview.window == (0, 0, 640, 360)314        camera.preview.window = (0, 720-360, 640, 360)315        assert camera.preview.window == (0, 720-360, 640, 360)316        camera.preview.window = (1280-640, 0, 640, 360)317        assert camera.preview.window == (1280-640, 0, 640, 360)318        camera.preview.window = (1280-640, 720-360, 640, 360)319        assert camera.preview.window == (1280-640, 720-360, 640, 360)320        camera.preview.window = (0, 0, 1920, 1080)321        assert camera.preview.window == (0, 0, 1920, 1080)322def test_preview_resolution(camera, previewing):323    if previewing:324        save_resolution = camera.resolution325        try:326            camera.resolution = (640, 480)327            assert camera.preview.resolution is None328            camera.preview.resolution = (320, 240)329            assert camera.preview.resolution == (320, 240)330            assert camera._camera.outputs[0].framesize == (320, 240)331            assert camera._camera.outputs[2].framesize == (640, 480)332            camera.resolution = (320, 240)333            assert camera.preview.resolution is None334            assert camera._camera.outputs[0].framesize == (320, 240)335            assert camera._camera.outputs[2].framesize == (320, 240)336            camera.resolution = (1280, 720)337            assert camera.resolution == (1280, 720)338            assert camera.preview.resolution is None339            assert camera._camera.outputs[0].framesize == (1280, 720)340            assert camera._camera.outputs[2].framesize == (1280, 720)341            with pytest.raises(picamera.PiCameraValueError):342                camera.preview.resolution = (1281, 720)343            with pytest.raises(picamera.PiCameraValueError):344                camera.preview.resolution = (1280, 721)345        finally:346            camera.resolution = save_resolution347def test_preview_rotation(camera, previewing):348    if previewing:349        save_value = camera.preview.rotation350        try:351            for value in range(0, 360):352                camera.preview.rotation = value353                assert camera.preview.rotation == [0, 90, 180, 270][value // 90]354            camera.preview.rotation = 360355            assert camera.preview.rotation == 0356        finally:357            camera.preview.rotation = save_value358def test_preview_vflip(camera, previewing):359    if previewing:360        boolean_attr(camera.preview, 'vflip')361def test_preview_hflip(camera, previewing):362    if previewing:363        boolean_attr(camera.preview, 'hflip')364def test_sensor_mode(camera, previewing):365    save_mode = camera.sensor_mode366    try:367        for mode in range(8):368            camera.sensor_mode = mode369            assert camera.sensor_mode == mode370        with pytest.raises(picamera.PiCameraError):371            camera.sensor_mode = 10372    finally:373        camera.sensor_mode = save_mode374def test_framerate_delta(camera, previewing):375    for num in range(-10, 11):376        camera.framerate_delta = num / 10377        assert Fraction(num, 10) - Fraction(1, 256) <= camera.framerate_delta <= Fraction(num, 10) + Fraction(1, 256)378def test_framerate(camera, previewing):379    save_framerate = camera.framerate380    try:381        assert len(camera.framerate) == 2382        camera.framerate = (30, 1)383        n, d = camera.framerate384        assert n/d == 30385        camera.framerate = (15, 1)386        n, d = camera.framerate387        assert n/d == 15388        camera.framerate = 30389        n, d = camera.framerate390        assert n/d == 30391        camera.framerate = 15.0392        n, d = camera.framerate393        assert n/d == 15394        camera.framerate = Fraction(30, 2)395        n, d = camera.framerate396        assert n/d == 15397        camera.framerate = Decimal(30)398        n, d = camera.framerate399        assert n/d == 30400        camera.framerate = 60401        n, d = camera.framerate402        assert n/d == 60403        camera.framerate = 90404        n, d = camera.framerate405        assert n/d == 90406        with pytest.raises(picamera.PiCameraError):407            camera.framerate = (30, 0)408        with pytest.raises(picamera.PiCameraError):409            camera.framerate = -1410        with pytest.raises(picamera.PiCameraError):411            camera.framerate = 200412    finally:413        camera.framerate = save_framerate414def test_resolution(camera, previewing):415    save_resolution = camera.resolution416    try:417        # Test setting some regular resolutions418        camera.resolution = (320, 240)419        assert camera.resolution == (320, 240)420        assert camera._camera.outputs[2].framesize == (320, 240)421        camera.resolution = (640, 480)422        assert camera.resolution == (640, 480)423        assert camera._camera.outputs[2].framesize == (640, 480)424        camera.resolution = (1280, 720)425        assert camera.resolution == (1280, 720)426        assert camera._camera.outputs[2].framesize == (1280, 720)427        camera.resolution = (1920, 1080)428        assert camera.resolution == (1920, 1080)429        # Camera's vertical resolution is always a multiple of 16, and430        # horizontal is a multiple of 32, hence the difference in the video431        # formats here and below432        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.width == 1920433        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.height == 1088434        camera.resolution = (2592, 1944)435        assert camera.resolution == (2592, 1944)436        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.width == 2592437        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.height == 1952438        # Test some irregular resolutions439        camera.resolution = (100, 100)440        assert camera.resolution == (100, 100)441        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.width == 128442        assert camera._camera.outputs[2]._port[0].format[0].es[0].video.height == 112443        # Anything below 16,16 will fail (because the camera's vertical444        # resolution works in increments of 16)445        with pytest.raises(picamera.PiCameraError):446            camera.resolution = (0, 0)447        with pytest.raises(picamera.PiCameraError):448            camera.resolution = (15, 15)449    finally:...
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