#!/usr/bin/env python

# Copyright 2014 by Akkana Peck: share and enjoy under the GPL v2 or later.

'''picamera: find and use cameras of various types.

A pycamera object will have the following methods:

__init__(verbose) # Set verbose to True for chatter on stdout

take_still(outfile=None)

# If outfile is not specified, a name will be

# assigned that incorporates the data and time.

# take_still's other arguments will vary

# with the capability of the camera library.

There may also be other routines, like take_video().

'''

__version__ = "0.1"

__author__ = "Akkana Peck <[email protected]>"

__license__ = "GPL v2"

__all__ = [ 'gphoto', "webcam", "piphoto" ]

# from . import *

import os

def has_webcamera():

return os.path.exists('/dev/video0')

def has_picamera():

# Regular Linux machines may have /dev/fb0,

# but the Pi doesn't seem to have it unless a pi cam is connected.

return os.uname()[4].startswith("arm") and os.path.exists('/dev/fb0')

from . import gphoto

def has_gphoto_camera():

return gphoto.has_camera()

def find_cameras(verbose=False):

'''Find the cameras connected to this machine, and return them

in order of quality. That means

try gphoto2 first, then webcam, then Pi camera.

'''

cameras = []

if has_gphoto_camera():

cameras.append(gphoto.Gphoto(verbose=verbose))

if has_webcamera():

from . import webcam

cameras.append(webcam.WebCam(verbose=verbose))

if has_picamera():

from . import piphoto

cameras.append(piphoto.PiCamera(verbose=verbose))

return cameras