def __init__(self):
"""build Fake input bin.
Description of pipeline :
| videotestsrc --> capsfilter --> | src pad
"""
super(FakeInputBin, self).__init__()
ImageBinElems = []
MyVideoSrc = LG.element_factory_make('videotestsrc')
ImageBinElems.append(MyVideoSrc)
MyVideoSrcFilter = LG.element_factory_make("capsfilter", "MyVideoSrc")
caps = LG.Caps(
"video/x-raw-yuv, framerate=(fraction)10/1, width=720,height=576")
MyVideoSrcFilter.set_property("caps", caps)
ImageBinElems.append(MyVideoSrcFilter)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(MyVideoSrc, MyVideoSrcFilter)
#this bin has only a src ghostPad
self.add_pad(LG.GhostPad('src', MyVideoSrcFilter.get_pad('src')))
def __init__(self, videowidget, location, framerate="5", nbImages= -1, start_buf=0, on_eos_cb=None) :
""" init of gstreamer player
inputs :
- videowidget : Drawing area widgert, in gstreamer style for playing video
- location : where the image are stored
- framerate : the video framerate
- nbImages : Number of images to play
- start_buf : index of the first image to play
- on_eos_cb : callback for EOS signal
"""
LG.lcl_gstreamer.__init__(self,video_widget =videowidget, pipe_name = 'Play pipe', cb_on_eos = on_eos_cb )
ElementList = []
self._location = location
self._nbImages = nbImages
self._framerate = framerate
self._start_buf = start_buf
# image load
self.MyImageSrc = LG.element_factory_make('multifilesrc')
self.MyImageSrc.set_property('location', self._location)
self.MyImageSrc.set_property('num-buffers', self._nbImages)
self.MyImageSrc.set_property('index', self._start_buf)
ElementList.append(self.MyImageSrc)
# filter
self.ImageFilter = LG.element_factory_make("capsfilter")
caps_string = self._filter_caps_string % self._framerate
caps = LG.gst.Caps(caps_string)
self.ImageFilter.set_property("caps", caps)
ElementList.append(self.ImageFilter)
# decodebin
self.dec = LG.element_factory_make('decodebin')
# Connect handler for 'new-decoded-pad' signal
self.dec.connect('new-decoded-pad', self.on_new_decoded_pad)
ElementList.append(self.dec)
# ffmpegclorspace
self.Myffmpeg = LG.element_factory_make('ffmpegcolorspace')
# Reference used in self.on_new_decoded_pad()
self.vpad = self.Myffmpeg.get_pad('sink')
ElementList.append(self.Myffmpeg)
# Image sink
MyImageSink = LG.element_factory_make('xvimagesink')
ElementList.append(MyImageSink)
#
# Add elements to pipeline
#
for elem in ElementList : self.pipe.add(elem)
# link all elements
LG.element_link_many(self.MyImageSrc, self.ImageFilter)
self.ImageFilter.link(self.dec)
LG.element_link_many(self.Myffmpeg, MyImageSink)
LG.lcl_gstreamer.connect_bus(self)
def __init__(self):
""" Build display bin
"""
super(DisplayBin, self).__init__()
ImageBinElems = []
Myffmpeg = LG.element_factory_make(
'ffmpegcolorspace') # ffmpegcolorspace for display
ImageBinElems.append(Myffmpeg)
# scale image
Myvideoscale = LG.element_factory_make('videoscale',
'DisplayVideoScale')
ImageBinElems.append(Myvideoscale)
MyImageSink = LG.element_factory_make('autovideosink')
ImageBinElems.append(MyImageSink)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(Myffmpeg, Myvideoscale, MyImageSink)
# only a sink (input) pad
self.add_pad(LG.GhostPad('sink', Myffmpeg.get_pad('sink')))
def __init__(self):
"""build Dv cam input bin
Description of pipeline :
| dv1394src --> dvdemux --> dvdec --> ffmpegcolorspace --> | src_pad
"""
super(DvInputBin, self).__init__()
ImageBinElems = []
MyVideoSrc = LG.element_factory_make('dv1394src')
ImageBinElems.append(MyVideoSrc)
#set demuxer ( separation image/sound)
MyDemux = LG.element_factory_make("dvdemux", "demuxer")
ImageBinElems.append(MyDemux)
MyDemux.connect("pad-added", self.MyDemux_callback)
self.MyVideodecoder = LG.element_factory_make("dvdec", "video-decoder")
ImageBinElems.append(self.MyVideodecoder)
# ffmpeg needed for pipe ; without the next elements dont understand the stream flow
MyffmpegInput = LG.element_factory_make('ffmpegcolorspace')
ImageBinElems.append(MyffmpegInput)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(MyVideoSrc, MyDemux)
LG.element_link_many(self.MyVideodecoder, MyffmpegInput)
#this bin has only a src ghostPad
self.add_pad(LG.GhostPad('src', MyffmpegInput.get_pad('src')))
def __init__(self, alphaValueStream, image, alphaValueImage):
"""
Description of pipeline :
sink pad | --> queue --> videorate --> videoscale --> capsfilter --> videobox --> videoMixer | src pad
"""
super(MixStreamAndImage, self).__init__()
self.__image2Mix = image
self.__alphaValueImage = alphaValueImage
ImageBinElems = []
queueB2 = LG.element_factory_make("queue",
"queueB2") # queue of branch 2
ImageBinElems.append(queueB2)
Myvideorate = LG.element_factory_make(
'videorate') # rate transformation
ImageBinElems.append(Myvideorate)
Myvideoscale = LG.element_factory_make('videoscale') # scale image
ImageBinElems.append(Myvideoscale)
VideoFilter = LG.element_factory_make("capsfilter")
caps = LG.Caps(
"video/x-raw-yuv, framerate=(fraction)10/1, width=720,height=576"
) # scale image with caps
VideoFilter.set_property("caps", caps)
ImageBinElems.append(VideoFilter)
MyVideoBox = LG.element_factory_make(
'videobox',
"MyVideoBox") # videoBox where input video stream is displayed
MyVideoBox.set_property('border-alpha', 0)
MyVideoBox.set_property('alpha', alphaValueStream)
ImageBinElems.append(MyVideoBox)
# Video mixer : mix input in videobox with image
MyVideomixer = LG.element_factory_make('videomixer',
"MyVideomixer") # video mixer
ImageBinElems.append(MyVideomixer)
# input image to mix
# create Bin for input Image
self.ImageBin = InputImageBin(self.__image2Mix, alphaValueImage)
ImageBinElems.append(self.ImageBin)
for elem in ImageBinElems:
self.add(elem)
#input stream
LG.element_link_many(queueB2, Myvideorate, Myvideoscale, VideoFilter,
MyVideoBox, MyVideomixer)
# mix with image
self.ImageBin.link(MyVideomixer)
# this module has a sink pad and a src pad
self.add_pad(LG.GhostPad('sink', queueB2.get_pad('sink')))
self.add_pad(LG.GhostPad('src', MyVideomixer.get_pad('src')))
def __init__(self, image, alphaValue, framerate=1):
"""
Description of pipeline :
| multifilesrc --> capsfilter --> jpegdec --> videoscale --> capsfilter --> alpha --> | src pad
"""
super(InputImageBin, self).__init__()
self.__image2Mix = image
self.__framerate = framerate
self.__alphaValueImage = alphaValue
ImageBinElems = []
# load input image
self.InputImage = LG.element_factory_make('multifilesrc')
self.InputImage.set_property('location', self.__image2Mix)
ImageBinElems.append(self.InputImage)
# filter to set frame rate
self.ImageFilter = LG.element_factory_make("capsfilter")
self._filter_caps_string = "image/jpeg, framerate=(fraction)%s/1 ,width=%s,height=%s "
caps_string = self._filter_caps_string % (
self.__framerate, MCONST.VIDEO_PAL_RES[0], MCONST.VIDEO_PAL_RES[1])
caps = LG.Caps(caps_string)
self.ImageFilter.set_property("caps", caps)
ImageBinElems.append(self.ImageFilter)
# dec jpeg as stream
MyJpecdec = LG.element_factory_make('jpegdec')
ImageBinElems.append(MyJpecdec)
# scale image
Myvideoscale = LG.element_factory_make('videoscale')
ImageBinElems.append(Myvideoscale)
# needed again for setting aspect ratio
InputImageFilter = LG.element_factory_make(
'capsfilter', "InputImageFilter") # set filter on scale
caps2 = LG.Caps("video/x-raw-yuv, width=%s,height=%s" %
(MCONST.VIDEO_PAL_RES[0], MCONST.VIDEO_PAL_RES[1]))
InputImageFilter.set_property("caps", caps2)
ImageBinElems.append(InputImageFilter)
self.MyAlpha = LG.element_factory_make("alpha") # set alpha of image
self.MyAlpha.set_property("alpha", self.__alphaValueImage)
ImageBinElems.append(self.MyAlpha)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(self.InputImage, self.ImageFilter, MyJpecdec,
Myvideoscale, InputImageFilter, self.MyAlpha)
self.add_pad(LG.GhostPad('src', self.MyAlpha.get_pad('src')))
def __init__(self,
width=640,
height=480,
framerate=(2, 25),
source_input='v4l2src',
device='/dev/video0'):
"""build webcam cam input bin
Description of pipeline :
| v4lsrc or v4l2src --> capsfilter --> ffmpegcolorspace --> ScaleBin | src pad
params :
width : The webcam width. Integer value
height : The webcam width. Integer value
framerate : The webcam framerate. A tuple for fraction representation (denom,num)
source_input : The type of driver input. A string
device : Path to webcam device. A string
"""
super(WebcamInputBin, self).__init__()
ImageBinElems = []
MyVideoSrc = LG.element_factory_make(source_input)
MyVideoSrc.set_property("device", device)
ImageBinElems.append(MyVideoSrc)
MyVideoSrcFilter = LG.element_factory_make("capsfilter", "MyVideoSrc")
# create caps string according, width, height and framerate
caps = LG.Caps(
"video/x-raw-yuv, width=%s,height=%s , framerate=%s/%s " %
(width, height, framerate[0], framerate[1]))
self.logger.debug(" Webcam cap : %s" % caps.to_string())
MyVideoSrcFilter.set_property("caps", caps)
ImageBinElems.append(MyVideoSrcFilter)
MyyuvInput = LG.element_factory_make('ffmpegcolorspace')
ImageBinElems.append(MyyuvInput)
# scale Webcam Display to DV SCALE
MyScaleBin = ScaleBin(width, height)
ImageBinElems.append(MyScaleBin)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(MyVideoSrc, MyVideoSrcFilter, MyyuvInput,
MyScaleBin)
#this bin has only a src ghostPad
self.add_pad(LG.GhostPad('src', MyScaleBin.get_pad('src')))
def __init__(self, _cb_capture_done):
"""
Description of pipeline :
sink pad | videorate --> csp --> capsfilter --> fakesink |
Jpeg conversion is done on demand, when a capture is requested,
on the caalback. Jpeg conversion is done only when necessary
from a pixbuf.
"""
super(PhotoSaveBin, self).__init__()
self._cb_capture_done = _cb_capture_done
self.capture_handler_id = 0
ImageBinElems = []
Myvideorate = LG.element_factory_make(
'videorate', 'ImageRate') # rate transformation
ImageBinElems.append(Myvideorate)
# csp transformation
csp = LG.element_factory_make('ffmpegcolorspace', 'ImageCsp')
ImageBinElems.append(csp)
MyJpegFilter = LG.element_factory_make("capsfilter", "JpegFilter")
# create caps string according, width, height and framerate
caps = LG.Caps(self.JPEG_CAPS_FILTER)
self.logger.debug(" Webcam cap : %s" % caps.to_string())
MyJpegFilter.set_property("caps", caps)
ImageBinElems.append(MyJpegFilter)
#MyJpegenc = LG.element_factory_make("jpegenc","MyJpegenc") # jpeg encoding
#ImageBinElems.append(MyJpegenc)
self.photosink = LG.element_factory_make("fakesink", "PhotoSink")
self.photosink.set_property("signal-handoffs", 'true')
ImageBinElems.append(self.photosink)
for elem in ImageBinElems:
self.add(elem)
LG.element_link_many(Myvideorate, csp, MyJpegFilter, self.photosink)
self.add_pad(LG.GhostPad('sink', Myvideorate.get_pad('sink')))
def __init__(self, width=640, height=480):
"""
Description of pipeline :
sink pad | --> videoscale --> capsfilter --> videobox --> | src pad
"""
super(ScaleBin, self).__init__()
ImageBinElems = []
# compute the image size if neeeded
image_size_d = self.calc_video_size(float(width), float(height),
MCONST.VIDEO_PAL_RES[0],
MCONST.VIDEO_PAL_RES[1])
Myvideoscale = LG.element_factory_make('videoscale') # scale image
ImageBinElems.append(Myvideoscale)
MyVideoFilter = LG.element_factory_make("capsfilter")
caps = LG.Caps("video/x-raw-yuv,width=%s,height=%s" %
(image_size_d['width'],
image_size_d['height'])) # scale image with caps
MyVideoFilter.set_property("caps", caps)
ImageBinElems.append(MyVideoFilter)
MyVideoBox = LG.element_factory_make(
'videobox',
"MyVideoBox") # videoBox where input video stream is displayed
MyVideoBox.set_property('fill', 0) # fill with black
# borders are negative values for videobox . postive value used dor crop
MyVideoBox.set_property('top', -1 * image_size_d['top'])
MyVideoBox.set_property('bottom', -1 * image_size_d['bottom'])
MyVideoBox.set_property('left', -1 * image_size_d['left'])
MyVideoBox.set_property('right', -1 * image_size_d['right'])
ImageBinElems.append(MyVideoBox)
# add bins
for elem in ImageBinElems:
self.add(elem)
# link bins
LG.element_link_many(Myvideoscale, MyVideoFilter, MyVideoBox)
# this module has a sink pad and a src pad
self.add_pad(LG.GhostPad('sink', Myvideoscale.get_pad('sink')))
self.add_pad(LG.GhostPad('src', MyVideoBox.get_pad('src')))
class Lcl_gst_sound(LG.lcl_gstreamer) :
""" gstreamer : play a sound """
def __init__(self,soundfile,cb_error = None) :
"""
soundfile : The soundfile to play
cb_error : callback arror function
"""
LG.lcl_gstreamer.__init__(self,video_widget = None, pipe_name = 'Sound pipe', cb_on_error = cb_error )
self._soundfile = soundfile
#
# Creation of gstreamer pipeline
#
# Create elements
self.src = LG.element_factory_make('filesrc')
self.src.set_property('location', self._soundfile)
self.dec = LG.element_factory_make('decodebin')
# Connect handler for 'new-decoded-pad' signal
self.dec.connect('new-decoded-pad', self.on_new_decoded_pad)
self.conv = LG.element_factory_make('audioconvert')
self.rsmpl = LG.element_factory_make('audioresample')
self.sink = LG.element_factory_make('alsasink')
#
# Add elements to pipeline
#
self.pipe.add(self.src, self.dec, self.conv, self.rsmpl, self.sink)
# Linkelements
self.src.link(self.dec)
LG.element_link_many(self.conv, self.rsmpl, self.sink)
# Reference used in self.on_new_decoded_pad()
self.apad = self.conv.get_pad('sink')
self._on_error = False
def reset_pipe(self):
""" Gstreamer pipe configuration :
Build the elements according acquisition input,
availablity of mixer, and set output to videop display and file.
"""
ElementList = []
self.pipe = LG.Pipeline(self.pipe_name)
if (self.__inputType == MCONST.WEBCAM):
InputBin = WebcamInputBin(
width=self.__webcam_data['width'],
height=self.__webcam_data['height'],
framerate=self.__webcam_data['framerate_selected'],
source_input=self.__webcam_data['source_input'],
device=self.__webcam_data['device'])
elif (self.__inputType == MCONST.DVCAM):
InputBin = DvInputBin()
else:
InputBin = FakeInputBin()
ElementList.append(InputBin)
#create tee ( One for file sink, the other for video sink)
MyTee = LG.element_factory_make("tee", "MyTee")
ElementList.append(MyTee)
# both "branch" of the tee are queued
#
# File queue
#
queueFile = LG.element_factory_make("queue", "queueFile")
ElementList.append(queueFile)
#fileSink = SaveCapturedImageBin(self.__CaptureImagePath)
self.fileSink = PhotoSaveBin(self._cb_process_frame)
ElementList.append(self.fileSink)
#
# Display queue
#
queueDisplay = LG.element_factory_make("queue", "queueDisplay")
ElementList.append(queueDisplay)
if (self.__mix == self.MIX):
self.MixBin = MixStreamAndImage(self.__alphaStream,
self.__image2Mix,
self.__alphaImage)
ElementList.append(self.MixBin)
DisplaySink = DisplayBin()
ElementList.append(DisplaySink)
#
# Add elements to pipeline
#
for elem in ElementList:
self.pipe.add(elem)
#
# link pipeline elements
#
#link input
LG.element_link_many(InputBin, MyTee)
# link tee File branch
LG.element_link_many(MyTee, queueFile, self.fileSink)
#link tee display Branch
LG.element_link_many(MyTee, queueDisplay)
if (self.__mix == self.MIX):
LG.element_link_many(queueDisplay, self.MixBin, DisplaySink)
else:
LG.element_link_many(queueDisplay, DisplaySink)
self.on_eos = False # usage tbd
# connect bus
LG.lcl_gstreamer.connect_bus(self)