oxtimeline/oxgst/imagesink.py

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2009-01-18 08:39:14 +00:00
# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
# GPL 2008
import gobject
import pygst
pygst.require("0.10")
import gst
import Image
class ImageSink(gst.BaseSink):
__gsignals__ = {
"frame" : (gobject.SIGNAL_RUN_LAST,
gobject.TYPE_NONE,
( gobject.TYPE_PYOBJECT, gobject.TYPE_UINT64 ))
}
__gsttemplates__ = (
gst.PadTemplate ("sink",
gst.PAD_SINK,
gst.PAD_ALWAYS,
gst.Caps("video/x-raw-rgb,"
"bpp = (int) 24, depth = (int) 24,"
"endianness = (int) BIG_ENDIAN,"
"red_mask = (int) 0x00FF0000, "
"green_mask = (int) 0x0000FF00, "
"blue_mask = (int) 0x000000FF, "
"width = (int) [ 1, max ], "
"height = (int) [ 1, max ], "
"framerate = (fraction) [ 0, max ]"))
)
def __init__(self):
gst.BaseSink.__init__(self)
self.width = 1
self.height = 1
self.set_sync(False)
def do_set_caps(self, caps):
self.log("caps %s" % caps.to_string())
self.log("padcaps %s" % self.get_pad("sink").get_caps().to_string())
self.width = caps[0]["width"]
self.height = caps[0]["height"]
self.framerate = caps[0]["framerate"]
if not caps[0].get_name() == "video/x-raw-rgb":
return False
return True
def do_render(self, buf):
self.log("buffer %s %d" % (gst.TIME_ARGS(buf.timestamp),
len(buf.data)))
frame = Image.fromstring('RGB', (self.width, self.height), buf.data)
self.emit('frame', frame, buf.timestamp)
return gst.FLOW_OK
def do_preroll(self, buf):
return self.do_render(buf)
gobject.type_register(ImageSink)