def test_gstreamer():
try:
gst.Bin()
except AttributeError:
return False
for element in "capsfilter tee appsink autoaudiosink".split():
try:
gst.element_factory_make(element)
except gst.ElementNotFoundError:
return False
return True
def __init_pipeline(self):
if not gstreamer_is_working:
self.stop()
from blaplay.blagui import blaguiutils
blaguiutils.error_dialog(
"Error", "Failed to construct GStreamer pipeline. Make sure "
"GStreamer 0.10, its Python bindings, and gst-plugins-base "
"and gst-plugins-good are installed.")
return False
audio_sink = gst.Bin()
filt = gst.element_factory_make("capsfilter")
filt.set_property(
"caps", gst.caps_from_string("audio/x-raw-float,"
"rate=(int)44100,"
"channels=(int)2,"
"width=(int)32,"
"depth=(int)32,"
"endianness=(int)1234"))
self.__equalizer = gst.element_factory_make("equalizer-10bands")
tee = gst.element_factory_make("tee")
queue = gst.element_factory_make("queue")
queue.set_property("silent", True)
def new_buffer(sink):
self.emit("new_buffer", sink.emit("pull_buffer"))
appsink = gst.element_factory_make("appsink")
appsink.set_property("drop", True)
appsink.set_property("sync", True)
appsink.set_property("emit_signals", True)
appsink.connect("new_buffer", new_buffer)
sink = gst.element_factory_make("autoaudiosink")
self.__volume = gst.element_factory_make("volume")
elements = [filt, self.__equalizer, tee, queue, appsink,
self.__volume, sink]
map(audio_sink.add, elements)
pad = elements[0].get_static_pad("sink")
audio_sink.add_pad(gst.GhostPad("sink", pad))
gst.element_link_many(filt, self.__equalizer, tee)
gst.element_link_many(tee, self.__volume, sink)
gst.element_link_many(tee, queue, appsink)
video_sink = gst.element_factory_make("xvimagesink")
video_sink.set_property("force_aspect_ratio", True)
self.__bin = gst.element_factory_make("playbin2")
self.__bin.set_property("audio_sink", audio_sink)
self.__bin.set_property("buffer_duration", 500 * gst.MSECOND)
self.__bin.set_property("video_sink", video_sink)
self.__bin.connect("about_to_finish", self.__about_to_finish)
self.__bin.set_state(gst.STATE_READY)
bus = self.__bin.get_bus()
bus.add_signal_watch()
bus.enable_sync_message_emission()
self.__message_id = bus.connect("message", self.__message)
self.__sync_message_id = bus.connect(
"sync-message::element", self.__sync_message)
if blacfg.getboolean("player", "muted"):
volume = 0
else:
volume = blacfg.getfloat("player", "volume") * 100
self.set_volume(volume)
self.enable_equalizer(blacfg.getboolean("player", "use.equalizer"))
return True
