providers:checkbox: Use libcheese instead of our own gstreamer pipelines

Maintaining our own pipelines in this script is a mistake as all the small fixes we did are already provided and implemented in a better way in libcheese. Cheese >= 3.6 (Trusty is ok) can be driven from python using GObject Introspection. Fixes: https://bugs.launchpad.net/plainbox-provider-checkbox/+bug/1474199 https://bugs.launchpad.net/plainbox-provider-checkbox/+bug/1568664 

1 files changed, 87 insertions, 78 deletions

diff --git a/bin/camera_test b/bin/camera_test
index 794578b4..6128c0f9 100755
--- a/bin/camera_test
+++ b/bin/camera_test
@@ -164,13 +164,10 @@ class CameraTest:
 """
 A simple class that displays a test image via GStreamer.
 """
- def __init__(self, args, gst_plugin=None, gst_video_type=None):
+ def __init__(self, args):
 self.args = args
- self._mainloop = GObject.MainLoop()
 self._width = 640
 self._height = 480
- self._gst_plugin = gst_plugin
- self._gst_video_type = gst_video_type
 
 def detect(self):
 """
@@ -204,51 +201,62 @@ class CameraTest:
 else '',
 ' ]', sep="")
 
- resolutions = self._get_supported_resolutions(device)
- print(' ',
- self._supported_resolutions_to_string(resolutions).replace(
- "\n", " "),
- sep="")
+ resolutions = self._supported_resolutions_to_string(
+ self._get_supported_resolutions(device))
+ resolutions = resolutions.replace(
+ "Resolutions:", " Resolutions:")
+ resolutions = resolutions.replace("Format:", " Format:")
+ print(resolutions)
 
 if cp.capabilities & V4L2_CAP_VIDEO_CAPTURE:
 cap_status = 0
 return dev_status | cap_status
 
+ def _on_destroy(self, *args):
+ Clutter.main_quit()
+
+ def _take_photo(self, *args):
+ Cheese.Camera.take_photo(self.camera, self.filename)
+
 def led(self):
 """
 Activate camera (switch on led), but don't display any output
 """
- pipespec = ("v4l2src device=%(device)s "
- "! %(type)s "
- "! %(plugin)s "
- "! testsink"
- % {'device': self.args.device,
- 'type': self._gst_video_type,
- 'plugin': self._gst_plugin})
- logging.debug("LED test with pipeline %s", pipespec)
- self._pipeline = Gst.parse_launch(pipespec)
- self._pipeline.set_state(Gst.State.PLAYING)
- time.sleep(3)
- self._pipeline.set_state(Gst.State.NULL)
+ Clutter.threads_add_timeout(0, 3000, self._on_destroy, None, None)
+ video_texture = Clutter.Actor()
+ try:
+ camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ except TypeError: # libcheese < 3.18 still use Clutter.Texture
+ video_texture = Clutter.Texture()
+ camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ Cheese.Camera.setup(camera, None)
+ Cheese.Camera.play(camera)
+ Clutter.main()
 
 def display(self):
 """
 Displays the preview window
 """
- pipespec = ("v4l2src device=%(device)s "
- "! %(type)s,width=%(width)d,height=%(height)d "
- "! %(plugin)s "
- "! autovideosink"
- % {'device': self.args.device,
- 'type': self._gst_video_type,
- 'width': self._width,
- 'height': self._height,
- 'plugin': self._gst_plugin})
- logging.debug("display test with pipeline %s", pipespec)
- self._pipeline = Gst.parse_launch(pipespec)
- self._pipeline.set_state(Gst.State.PLAYING)
- time.sleep(10)
- self._pipeline.set_state(Gst.State.NULL)
+ stage = Clutter.Stage()
+ stage.set_title('Camera test')
+ stage.set_size(self._width, self._height)
+ stage.connect('destroy', self._on_destroy)
+ Clutter.threads_add_timeout(0, 10000, self._on_destroy, None, None)
+ video_texture = Clutter.Actor()
+ try:
+ camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ except TypeError: # libcheese < 3.18 still use Clutter.Texture
+ video_texture = Clutter.Texture()
+ camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ stage.add_actor(video_texture)
+ Cheese.Camera.setup(camera, None)
+ Cheese.Camera.play(camera)
+ stage.show()
+ Clutter.main()
 
 def still(self):
 """
@@ -272,7 +280,7 @@ class CameraTest:
 "-d", self.args.device,
 "-r", "%dx%d"
 % (width, height), filename]
- use_gstreamer = False
+ use_cheese = False
 if pixelformat:
 if 'MJPG' == pixelformat: # special tweak for fswebcam
 pixelformat = 'MJPEG'
@@ -281,40 +289,37 @@ class CameraTest:
 try:
 check_call(command, stdout=open(os.devnull, 'w'), stderr=STDOUT)
 except (CalledProcessError, OSError):
- use_gstreamer = True
-
- if use_gstreamer:
- pipespec = ("v4l2src device=%(device)s "
- "! %(type)s,width=%(width)d,height=%(height)d "
- "! %(plugin)s "
- "! jpegenc "
- "! filesink location=%(filename)s"
- % {'device': self.args.device,
- 'type': self._gst_video_type,
- 'width': width,
- 'height': height,
- 'plugin': self._gst_plugin,
- 'filename': filename})
- logging.debug("still test with gstreamer and "
- "pipeline %s", pipespec)
- self._pipeline = Gst.parse_launch(pipespec)
- self._pipeline.set_state(Gst.State.PLAYING)
- time.sleep(3)
- self._pipeline.set_state(Gst.State.NULL)
+ use_cheese = True
+
+ if use_cheese:
+ stage = Clutter.Stage()
+ stage.connect('destroy', self._on_destroy)
+ video_texture = Clutter.Actor()
+ try:
+ self.camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ except TypeError: # libcheese < 3.18 still use Clutter.Texture
+ video_texture = Clutter.Texture()
+ self.camera = Cheese.Camera.new(
+ video_texture, self.args.device, self._width, self._height)
+ Cheese.Camera.setup(self.camera, None)
+ Cheese.Camera.play(self.camera)
+ self.filename = filename
+ Clutter.threads_add_timeout(0, 3000, self._take_photo , None, None)
+ Clutter.threads_add_timeout(0, 4000, self._on_destroy, None, None)
+ Clutter.main()
+ Cheese.Camera.stop(self.camera)
 
 if not quiet:
- import imghdr
- image_type = imghdr.what(filename)
- pipespec = ("filesrc location=%(filename)s ! "
- "%(type)sdec ! "
- "videoscale ! "
- "imagefreeze ! autovideosink"
- % {'filename': filename,
- 'type': image_type})
- self._pipeline = Gst.parse_launch(pipespec)
- self._pipeline.set_state(Gst.State.PLAYING)
- time.sleep(10)
- self._pipeline.set_state(Gst.State.NULL)
+ stage = Clutter.Stage()
+ stage.set_title('Camera still picture test')
+ stage.set_size(width, height)
+ stage.connect('destroy', self._on_destroy)
+ Clutter.threads_add_timeout(0, 10000, self._on_destroy, None, None)
+ still_texture = Clutter.Texture.new_from_file(filename)
+ stage.add_actor(still_texture)
+ stage.show()
+ Clutter.main()
 
 def _supported_resolutions_to_string(self, supported_resolutions):
 """
@@ -563,16 +568,20 @@ if __name__ == "__main__":
 
 # Import Gst only for the test cases that will need it
 if args.test in ['display', 'still', 'led', 'resolutions']:
+ import contextlib
+ # Workaround to avoid "cluttervideosink missing"
+ # See https://bugzilla.gnome.org/show_bug.cgi?id=721277
+ with contextlib.suppress(FileNotFoundError):
+ gst_registry = '~/.cache/gstreamer-1.0/registry.x86_64.bin'
+ os.remove(os.path.expanduser(gst_registry))
+ import gi
+ gi.require_version('Gst', '1.0')
 from gi.repository import Gst
- if Gst.version()[0] > 0:
- gst_plugin = 'videoconvert'
- gst_video_type = 'video/x-raw'
- else:
- gst_plugin = 'ffmpegcolorspace'
- gst_video_type = 'video/x-raw-yuv'
+ gi.require_version('Cheese', '3.0')
+ from gi.repository import Cheese
+ gi.require_version('Clutter', '1.0')
+ from gi.repository import Clutter
 Gst.init(None)
- camera = CameraTest(args, gst_plugin, gst_video_type)
- else:
- camera = CameraTest(args)
-
+ Clutter.init()
+ camera = CameraTest(args)
 sys.exit(getattr(camera, args.test)())