def __init__(self, **kwargs):
self.holder = None
self.vCamera = None
self.vRecorder = None
self.recording = False
super(AndroidCamera, self).__init__(**kwargs)
self.holder = AndroidWidgetHolder(size=self.size, pos=self.pos)
self.add_widget(self.holder)
self.helper = CameraHelper()
def __init__(self, **kwargs): self.holder = None self.vCamera = None self.vRecorder = None self.recording = False super(AndroidCamera, self).__init__(**kwargs) self.holder = AndroidWidgetHolder(size = self.size, pos = self.pos) self.add_widget(self.holder) self.helper = CameraHelper()
class AndroidCamera(Widget):
__events__ = ['on_preview_frame']
def __init__(self, **kwargs):
self.holder = None
self.vCamera = None
self.vRecorder = None
self.recording = False
super(AndroidCamera, self).__init__(**kwargs)
self.holder = AndroidWidgetHolder(size = self.size, pos = self.pos)
self.add_widget(self.holder)
self.helper = CameraHelper()
#Stops the recording and then closes the MediaRecorder, Camera and View
@run_on_ui_thread
def stop(self):
#Check if the Camera and MediaRecorder exists and if the App is recording
if self.vCamera is None or self.vRecorder is None or not self.recording:
return
#Stop the MediaRecorder and close it. Lock camera so that it can be modified.
self.vRecorder.stop()
self.vRecorder.reset()
self.vRecorder.release()
self.vRecorder = None
self.recording = False
self.vCamera.lock()
#Remove previewsurface and close the Camera and View
self.vCamera.setPreviewCallback(None)
self.vCamera.release()
self.vCamera = None
self.holder.view = None
#Start the Camera and the SurfaceView
@run_on_ui_thread
def start(self):
#Checks if there is no Camera running
if self.vCamera is not None:
return
#Opens the rear camera (Int value 0) and sets the proper rotation
self.vCamera = Camera.open(0)
self.rotation = PythonActivity.mActivity.getWindowManager().getDefaultDisplay().getRotation()
self.vCamera.setDisplayOrientation(self.helper.rotationDictionary(self.rotation))
#Creates a 'fake' SurfaceView so that the Callback functions can be set
self.surfView = SurfaceView(PythonActivity.mActivity)
surfHolder = self.surfView.getHolder()
#Sets the SurfaceHolderCallback to _on_surface_changed
self.surfHolderCallback = SurfaceHolderCallback(self._on_surface_changed)
surfHolder.addCallback(self.surfHolderCallback)
#Attaches the View to the AndroidWidgetHolder
self.holder.view = self.surfView
#Override function for the SurfaceHolderCallback
def _on_surface_changed(self, frmt, width, height):
#Sets the proper width and height for the preview
params = self.vCamera.getParameters()
wantedSize = self.helper.getOptimalPreviewSize(params.getSupportedPreviewSizes(), width, height)
params.setPreviewSize(wantedSize.width, wantedSize.height)
self.vCamera.setParameters(params)
#Now that we know the camera size, we'll create 2 buffers for faster
#result (using Callback buffer approach, as described in Camera android
#documentation)
#It also reduce the GC collection
bpp = ImageFormat.getBitsPerPixel(params.getPreviewFormat()) / 8.
buf = '\x00' * int(width * height * bpp)
self.vCamera.addCallbackBuffer(buf)
self.vCamera.addCallbackBuffer(buf)
#Create a PreviewCallback to get back the onPreviewFrame into python
self.previewCallback = PreviewCallback(self._on_preview_frame)
#Connect the Buffer and the PreviewDisplay to the Camera
self.vCamera.setPreviewCallbackWithBuffer(self.previewCallback)
self.vCamera.setPreviewDisplay(self.surfView.getHolder())
#Start the MediaRecorder
if self.prepareRecorder():
self.vRecorder.start()
self.recording = True
def _on_preview_frame(self, camera, data):
self.dispatch('on_preview_frame', camera, data)
self.vCamera.addCallbackBuffer(data)
def on_preview_frame(self, camera, data):
pass
def on_size(self, instance, size):
if self.holder:
self.holder.size = size
def on_pos(self, instance, pos):
if self.holder:
self.holder.pos = pos
#Function to set up the MediaRecorder
def prepareRecorder(self):
self.vRecorder = MediaRecorder()
self.vCamera.unlock()
self.vRecorder.setCamera(self.vCamera)
#Sets the proper arguments for the MediaRecorder
self.vRecorder.setAudioSource(AudioSource.CAMCORDER)
self.vRecorder.setVideoSource(VideoSource.CAMERA)
self.vRecorder.setProfile(CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH))
self.vRecorder.setOutputFile(self.helper.getOutputMediaFile().toString())
self.vRecorder.setPreviewDisplay(self.surfView.getHolder().getSurface())
#Tries to connect the MediaRecorder, throws exception if it fails
try:
self.vRecorder.prepare()
except Exception as ex:
template = "An exception of type {0} occured. Arguments:\n{1!r}"
message = template.format(type(ex).__name__, ex.args)
print message
return False
return True
class AndroidCamera(Widget):
__events__ = ['on_preview_frame']
def __init__(self, **kwargs):
self.holder = None
self.vCamera = None
self.vRecorder = None
self.recording = False
super(AndroidCamera, self).__init__(**kwargs)
self.holder = AndroidWidgetHolder(size=self.size, pos=self.pos)
self.add_widget(self.holder)
self.helper = CameraHelper()
#Stops the recording and then closes the MediaRecorder, Camera and View
@run_on_ui_thread
def stop(self):
#Check if the Camera and MediaRecorder exists and if the App is recording
if self.vCamera is None or self.vRecorder is None or not self.recording:
return
#Stop the MediaRecorder and close it. Lock camera so that it can be modified.
self.vRecorder.stop()
self.vRecorder.reset()
self.vRecorder.release()
self.vRecorder = None
self.recording = False
self.vCamera.lock()
#Remove previewsurface and close the Camera and View
self.vCamera.setPreviewCallback(None)
self.vCamera.release()
self.vCamera = None
self.holder.view = None
#Start the Camera and the SurfaceView
@run_on_ui_thread
def start(self):
#Checks if there is no Camera running
if self.vCamera is not None:
return
#Opens the rear camera (Int value 0) and sets the proper rotation
self.vCamera = Camera.open(0)
self.rotation = PythonActivity.mActivity.getWindowManager(
).getDefaultDisplay().getRotation()
self.vCamera.setDisplayOrientation(
self.helper.rotationDictionary(self.rotation))
#Creates a 'fake' SurfaceView so that the Callback functions can be set
self.surfView = SurfaceView(PythonActivity.mActivity)
surfHolder = self.surfView.getHolder()
#Sets the SurfaceHolderCallback to _on_surface_changed
self.surfHolderCallback = SurfaceHolderCallback(
self._on_surface_changed)
surfHolder.addCallback(self.surfHolderCallback)
#Attaches the View to the AndroidWidgetHolder
self.holder.view = self.surfView
#Override function for the SurfaceHolderCallback
def _on_surface_changed(self, frmt, width, height):
#Sets the proper width and height for the preview
params = self.vCamera.getParameters()
wantedSize = self.helper.getOptimalPreviewSize(
params.getSupportedPreviewSizes(), width, height)
params.setPreviewSize(wantedSize.width, wantedSize.height)
self.vCamera.setParameters(params)
#Now that we know the camera size, we'll create 2 buffers for faster
#result (using Callback buffer approach, as described in Camera android
#documentation)
#It also reduce the GC collection
bpp = ImageFormat.getBitsPerPixel(params.getPreviewFormat()) / 8.
buf = '\x00' * int(width * height * bpp)
self.vCamera.addCallbackBuffer(buf)
self.vCamera.addCallbackBuffer(buf)
#Create a PreviewCallback to get back the onPreviewFrame into python
self.previewCallback = PreviewCallback(self._on_preview_frame)
#Connect the Buffer and the PreviewDisplay to the Camera
self.vCamera.setPreviewCallbackWithBuffer(self.previewCallback)
self.vCamera.setPreviewDisplay(self.surfView.getHolder())
#Start the MediaRecorder
if self.prepareRecorder():
self.vRecorder.start()
self.recording = True
def _on_preview_frame(self, camera, data):
self.dispatch('on_preview_frame', camera, data)
self.vCamera.addCallbackBuffer(data)
def on_preview_frame(self, camera, data):
pass
def on_size(self, instance, size):
if self.holder:
self.holder.size = size
def on_pos(self, instance, pos):
if self.holder:
self.holder.pos = pos
#Function to set up the MediaRecorder
def prepareRecorder(self):
self.vRecorder = MediaRecorder()
self.vCamera.unlock()
self.vRecorder.setCamera(self.vCamera)
#Sets the proper arguments for the MediaRecorder
self.vRecorder.setAudioSource(AudioSource.CAMCORDER)
self.vRecorder.setVideoSource(VideoSource.CAMERA)
self.vRecorder.setProfile(
CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH))
self.vRecorder.setOutputFile(
self.helper.getOutputMediaFile().toString())
self.vRecorder.setPreviewDisplay(
self.surfView.getHolder().getSurface())
#Tries to connect the MediaRecorder, throws exception if it fails
try:
self.vRecorder.prepare()
except Exception as ex:
template = "An exception of type {0} occured. Arguments:\n{1!r}"
message = template.format(type(ex).__name__, ex.args)
print message
return False
return True
