Different gPhoto2 backends implemented. Functionally is working on a very basic level

INSTALL.md

@@ -1,3 +1,8 @@
 pip install pyqt5
 pip install opencv-python
-pip install Pillow
+pip install Pillow
+apt install gphoto2 libgphoto2-dev
+
+pip install gphoto2
+-or-
+pip install gphoto2-cffi

photobooth/Camera.py

@@ -8,6 +8,22 @@ class Camera:
         self.hasPreview = False
         self.hasIdle = False
 
+
+    def __enter__(self):
+
+        return self
+
+
+    def __exit__(self, exc_type, exc_value, traceback):
+
+        self.cleanup()
+
+
+    def cleanup(self):
+
+        pass
+        
+
     @property
     def hasPreview(self):
 

photobooth/CameraGphoto2.py

@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import io, logging
+
+from PIL import Image
+
+import gphoto2 as gp
+
+from Camera import Camera
+
+
+class CameraGphoto2(Camera):
+
+    def __init__(self):
+
+        super().__init__()
+
+        self.hasPreview = True
+        self.hasIdle = False
+        self._isActive = False
+
+        self._setupLogging()
+        self._setupCamera()
+
+
+    def cleanup(self):
+
+        self._cap.exit(self._ctxt)
+        # self.setIdle()
+
+
+    def _setupLogging(self):
+
+        logging.basicConfig(
+            format='%(levelname)s: %(name)s: %(message)s', 
+            level=logging.ERROR)
+        gp.check_result(gp.use_python_logging())
+
+
+    def _setupCamera(self):
+
+        self._ctxt = gp.Context()
+        self._cap = gp.Camera()
+        self._cap.init(self._ctxt)
+
+        self._printSummary()
+
+
+        # get configuration tree
+        config = gp.check_result(gp.gp_camera_get_config(self._cap))
+
+        # find the image format config item
+        OK, image_format = gp.gp_widget_get_child_by_name(config, 'imageformat')
+        if OK >= gp.GP_OK:
+            # get current setting
+            value = gp.check_result(gp.gp_widget_get_value(image_format))
+            # make sure it's not raw
+            if 'raw' in value.lower():
+                raise RuntimeError('Camera file format is set to RAW')
+
+        print(config)
+
+
+    def _printSummary(self):
+
+        # self.setActive()
+
+        text = self._cap.get_summary(self._ctxt)
+        print('Summary')
+        print('=======')
+        print(str(text))
+
+        # self.setIdle()
+
+
+    # def setActive(self):
+
+        # self._cap.init(self._ctxt)
+        # if not self._isActive:
+        #     self._cap.init(self._ctxt)
+        #     self._isActive = True
+
+
+    # def setIdle(self):
+
+        # self._cap.exit(self._ctxt)
+    #     if self._isActive:
+    #         self._cap.exit(self._ctxt)
+    #         self._isActive = False
+
+
+    def getPreview(self):
+
+        # self.setActive()
+        camera_file = self._cap.capture_preview() #gp.check_result(gp.gp_camera_capture_preview(self._cap))
+        file_data = camera_file.get_data_and_size() # gp.check_result(gp.gp_file_get_data_and_size(camera_file))
+        return Image.open(io.BytesIO(file_data))
+
+
+    def getPicture(self):
+        
+        # self.setActive()
+        file_path = self._cap.capture(gp.GP_CAPTURE_IMAGE)
+        camera_file = self._cap.file_get(file_path.folder, file_path.name, gp.GP_FILE_TYPE_NORMAL)
+        file_data = camera_file.get_data_and_size()
+        return Image.open(io.BytesIO(file_data))
+

photobooth/CameraGphoto2Cffi.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import io
+
+from PIL import Image
+
+import gphoto2cffi as gp
+
+from Camera import Camera
+
+
+class CameraGphoto2Cffi(Camera):
+
+    def __init__(self):
+
+        super().__init__()
+
+        self.hasPreview = True
+        self.hasIdle = True
+
+        self._setupCamera()
+
+
+    def _setupCamera(self):
+
+        self._cap = gp.Camera()
+        print(self._cap.supported_operations)
+
+        if 'raw' in self._cap.config['imgsettings']['imageformat'].value.lower():
+            raise RuntimeError('Camera file format is set to RAW')
+
+
+    def setActive(self):
+
+        self._cap._get_config()['actions']['viewfinder'].set(True)
+
+
+    def setIdle(self):
+
+        self._cap._get_config()['actions']['viewfinder'].set(False)
+
+
+    def getPreview(self):
+
+        return Image.open(io.BytesIO(self._cap.get_preview()))
+
+
+    def getPicture(self):
+        
+        return Image.open(io.BytesIO(self._cap.capture()))
+

photobooth/CameraGphoto2CommandLine.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from Camera import Camera
+
+from PIL import Image
+import os, subprocess
+
+class CameraGphoto2CommandLine(Camera):
+
+    def __init__(self):
+
+        super().__init__()
+
+        self.hasPreview = False
+        self.hasIdle = False
+
+        if os.access('/dev/shm', os.W_OK):
+            self._tmp_filename = '/dev/shm/photobooth.jpg'
+        else:
+            self._tmp_filename = '/tmp/photobooth.jpg'
+
+        self.setActive()
+
+
+    def setActive(self):
+
+        print(self._callGphoto('-a', '/dev/null'))
+
+
+    def getPicture(self):
+        
+        self._callGphoto('--capture-image-and-download', self._tmp_filename)
+        return Image.open(self._tmp_filename)
+
+
+    def _callGphoto(self, action, filename):
+
+        cmd = 'gphoto2 --force-overwrite --quiet ' + action + ' --filename ' + filename
+        return subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)

photobooth/Photobooth.py

@@ -9,8 +9,6 @@ from PictureDimensions import PictureDimensions
 import Gui
 from PyQt5Gui import PyQt5Gui
 
-from CameraOpenCV import CameraOpenCV as Camera
-
 from PIL import Image, ImageOps
 
 from multiprocessing import Pipe, Process
@@ -21,11 +19,11 @@ from time import time, sleep, localtime, strftime
 
 class Photobooth:
 
-    def __init__(self, config):
+    def __init__(self, config, camera):
 
         picture_basename = strftime(config.get('Picture', 'basename'), localtime())
 
-        self._cap = Camera()
+        self._cap = camera
         self._pic_dims = PictureDimensions(config, self._cap.getPicture().size)
         self._pic_list = PictureList(picture_basename)
 
@@ -117,7 +115,9 @@ class Photobooth:
     def showCounterNoPreview(self):
 
         for i in range(self.countdownTime):
-            self._send.send( Gui.PreviewState(str(i)) )
+            self._send.send( Gui.PreviewState(
+                message = str(i),
+                picture = Image.new('RGB', (1,1), 'white') ) )
             sleep(1)
 
 
@@ -165,8 +165,20 @@ class Photobooth:
 
 def main_photobooth(config, send, recv):
 
-    photobooth = Photobooth(config)
+    if config.get('Camera', 'module') == 'python-gphoto2':
-    return photobooth.run(send, recv)
+        from CameraGphoto2 import CameraGphoto2 as Camera
+    elif config.get('Camera', 'module') == 'gphoto2-cffi':
+        from CameraGphoto2Cffi import CameraGphoto2Cffi as Camera
+    elif config.get('Camera', 'module') == 'gphoto2-commandline':
+        from CameraGphoto2CommandLine import CameraGphoto2CommandLine as Camera
+    elif config.get('Camera', 'module') == 'opencv':
+        from CameraOpenCV import CameraOpenCV as Camera
+    else:
+        raise ImportError('Unknown camera module "' + config.get('Camera', 'module') + '"')
+
+    with Camera() as cap:
+        photobooth = Photobooth(config, cap)
+        return photobooth.run(send, recv)
 
 
 def run(argv):

photobooth/PyQt5Gui.py

@@ -324,26 +324,27 @@ class PyQt5Settings(QFrame):
 
         global cfg
 
-        wrapper = QComboBox()
+        self._camera_modules = [
-        wrapper.addItem('command line')
+            ('gphoto2-commandline', 'gphoto2 via command line'),
-        wrapper.addItem('piggyphoto')
+            # ('piggyphoto', 'piggyphoto'),
-        wrapper.addItem('gphoto2-cffi')
+            ('gphoto2-cffi', 'gphoto2-cffi'),
+            ('python-gphoto2', 'python-gphoto2'),
+            ('opencv', 'OpenCV'),
+            ('', 'none') ]
 
-        current_wrapper = cfg.get('Camera', 'gphoto2_wrapper')
+        wrapper = QComboBox()
-        if current_wrapper == 'commandline':
+        for m in self._camera_modules:
-            wrapper.setCurrentIndex(0)
+            wrapper.addItem(m[1])
-        elif current_wrapper == 'piggyphoto':
+
-            wrapper.setCurrentIndex(1)
+        current_wrapper = cfg.get('Camera', 'module')
-        elif current_wrapper == 'gphoto2-cffi':
+        idx = [x for x, m in enumerate(self._camera_modules) if m[0] == current_wrapper]
-            wrapper.setCurrentIndex(2)
+        wrapper.setCurrentIndex(idx[0] if len(idx) > 0 else -1)
-        else:
-            wrapper.setCurrentIndex(-1)
 
         self._value_widgets['Camera'] = {}
-        self._value_widgets['Camera']['gphoto2_wrapper'] = wrapper
+        self._value_widgets['Camera']['module'] = wrapper
 
         layout = QFormLayout()
-        layout.addRow(QLabel('gPhoto2 wrapper:'), self._value_widgets['Camera']['gphoto2_wrapper'])
+        layout.addRow(QLabel('Camera module:'), self._value_widgets['Camera']['module'])
 
         widget = QGroupBox('Camera settings')
         widget.setLayout(layout)
@@ -467,8 +468,9 @@ class PyQt5Settings(QFrame):
         cfg.set('Picture', 'min_dist_y', self._value_widgets['Picture']['min_dist_y'].text())
         cfg.set('Picture', 'basename', self._value_widgets['Picture']['basename'].text())
 
-        wrapper_idx2val = [ 'commandline', 'piggyphoto', 'gphoto2-cffi' ]
+        # wrapper_idx2val = [ 'commandline', 'piggyphoto', 'gphoto2-cffi', '' ]
-        cfg.set('Camera', 'gphoto2_wrapper', wrapper_idx2val[self._value_widgets['Camera']['gphoto2_wrapper'].currentIndex()])
+        # cfg.set('Camera', 'module', wrapper_idx2val[self._value_widgets['Camera']['module'].currentIndex()])
+        cfg.set('Camera', 'module', self._camera_modules[self._value_widgets['Camera']['module'].currentIndex()][0])
 
         cfg.write()
         self._gui.restart()

photobooth/defaults.cfg

@@ -7,8 +7,8 @@ width = 1024
 height = 600
 
 [Camera]
-# Wrapper to use gPhoto2 (gphoto2-cffi, piggyphoto, commandline)
+# Camera module to use (python-gphoto2, gphoto2-cffi, gphoto2-commandline, opencv)
-gphoto2_wrapper = commandline
+module = python-gphoto2
 
 [Gpio]
 # Enable use of GPIO (True/False)