reorganise folders

[imago.git] / src / capture.py

diff --git a/src/capture.py b/src/capture.py
new file mode 100755 (executable)
index 0000000..dd7f47f
--- /dev/null
+++ b/src/capture.py
@@ -0,0 +1,166 @@
+#!/usr/bin/env python
+
+"""Go image capture.
+
+This module defines a UI for capturing images with a (web)camera and imediately
+proccessing them with Imago.
+"""
+
+import os
+import sys
+import argparse
+import time
+from threading import Thread
+from Queue import Queue, Empty
+
+import pygame
+from pygame.locals import QUIT, KEYDOWN
+import Image
+
+from camera import Camera
+
+class Screen:
+    """Basic PyGame setup."""
+    def __init__(self, res):
+        pygame.init()
+        pygame.display.set_mode(res)
+        pygame.display.set_caption("Go image capture")
+        self._screen = pygame.display.get_surface()
+
+    def display_picture(self, im):
+        """Display image on PyGame screen."""
+        pg_img = pygame.image.frombuffer(im.tostring(), im.size, im.mode)
+        self._screen.blit(pg_img, (0,0))
+        pygame.display.flip()
+
+class Capture:
+    """This object maintains communication between the camera, the PyGame screen
+    and Imago."""
+    def __init__(self, device, res):
+        self.cam = Camera(vid=device, res=res)
+        self.screen = Screen(res)
+
+        self.im_number = 0
+
+        self.saving_dir = "./captured/" + time.strftime("%Y-%m-%d %H:%M/")
+
+        if not os.path.isdir(self.saving_dir):
+            os.makedirs(self.saving_dir)
+
+    def __del__(self):
+        del self.cam
+
+    def live(self, q):
+        """Run live preview on the screen."""
+        clock = pygame.time.Clock()
+        while True: 
+            if q:
+                try:
+                    line = q.get_nowait() # or q.get(timeout=.1)
+                except Empty:
+                    pass
+                else:
+                    if line == "stop\n":
+                        done = True
+                    elif line == "exit\n":
+                        sys.exit()
+            else:
+                for event in pygame.event.get():
+                    if event.type == pygame.QUIT:
+                        sys.exit()
+                    elif event.type == pygame.KEYDOWN:
+                        done = True
+
+            im = self.cam.get_image()
+            self.screen.display_picture(im)
+            clock.tick(5)
+
+    def auto(self, interval):
+        """Take new image every *interval* seconds.""" #TODO or is it milisecs?
+        last = 0
+        clock = pygame.time.Clock()
+
+        while True:
+            for event in pygame.event.get():
+                if event.type == pygame.QUIT:
+                    done = True
+            if time.time() - last > interval:
+                last = time.time()
+                self.take()
+            clock.tick(15)
+
+    def manual(self):
+        """Take images manualy by pressing a key."""
+        while True:
+            event = pygame.event.wait()
+            if event.type == QUIT:
+                break
+            if event.type != KEYDOWN:
+                continue
+            self.take()
+            
+    def take(self):
+        """Take a new image from the camera."""
+        im = self.cam.get_image()
+        self.screen.display_picture(im)
+        im.save(self.saving_dir + "{0:0>3}.jpg".format(self.im_number), 'JPEG')
+        self.im_number += 1
+
+
+def main():
+    """Parse the argument and setup the UI."""
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument('-c', '--cmd', dest='cmd', action='store_true',
+                    help="take commands from stdin")
+    parser.add_argument('-d', type=int, default=0,
+                        help="video device id")
+    parser.add_argument('-a', type=int, default=0,
+                        help="take picture automaticaly every A seconds")
+    parser.add_argument('-r', type=int, nargs=2, default=[640, 480],
+                        help="set camera resolution")
+    args = parser.parse_args()
+
+    res=(args.r[0], args.r[1])
+    capture = Capture(args.d, res)
+
+
+    if args.cmd:
+        def enqueue_input(queue):
+            for line in iter(sys.stdin.readline, b''):
+                queue.put(line)
+
+        q = Queue()
+        t = Thread(target=enqueue_input, args=(q,))
+        t.daemon = True 
+        t.start()
+        
+        capture.live(q)
+
+        clock = pygame.time.Clock()
+
+        while True:
+            try:
+                line = q.get_nowait() # or q.get(timeout=.1)
+            except Empty:
+                pass
+            else: 
+                if line == "take\n":
+                    capture.take()
+                elif line == "exit\n":
+                    break
+            clock.tick(10)
+
+    else:
+        capture.live(None)
+        if args.a > 0:
+            capture.auto(args.a)
+        else:
+            capture.manual()
+
+    del capture
+    
+if __name__ == '__main__':
+    try:
+        main()
+    finally:
+        pygame.quit()