mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-06 01:19:38 +00:00
299 lines
9.2 KiB
Python
299 lines
9.2 KiB
Python
#!/usr/bin/env python
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# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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import pygtk
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pygtk.require('2.0')
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import sys
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import gobject
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gobject.threads_init()
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import pygst
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pygst.require('0.10')
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import gst
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import gst.interfaces
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import gtk
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gtk.gdk.threads_init()
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class GstPlayer:
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def __init__(self, videowidget):
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self.playing = False
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self.player = gst.element_factory_make("playbin", "player")
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self.videowidget = videowidget
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self.on_eos = False
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bus = self.player.get_bus()
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bus.enable_sync_message_emission()
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bus.add_signal_watch()
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bus.connect('sync-message::element', self.on_sync_message)
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bus.connect('message', self.on_message)
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def on_sync_message(self, bus, message):
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if message.structure is None:
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return
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if message.structure.get_name() == 'prepare-xwindow-id':
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# Sync with the X server before giving the X-id to the sink
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gtk.gdk.threads_enter()
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gtk.gdk.display_get_default().sync()
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self.videowidget.set_sink(message.src)
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message.src.set_property('force-aspect-ratio', True)
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gtk.gdk.threads_leave()
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def on_message(self, bus, message):
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t = message.type
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if t == gst.MESSAGE_ERROR:
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err, debug = message.parse_error()
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print "Error: %s" % err, debug
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if self.on_eos:
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self.on_eos()
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self.playing = False
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elif t == gst.MESSAGE_EOS:
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if self.on_eos:
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self.on_eos()
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self.playing = False
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def set_location(self, location):
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self.player.set_property('uri', location)
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def query_position(self):
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"Returns a (position, duration) tuple"
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try:
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position, format = self.player.query_position(gst.FORMAT_TIME)
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except:
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position = gst.CLOCK_TIME_NONE
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try:
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duration, format = self.player.query_duration(gst.FORMAT_TIME)
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except:
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duration = gst.CLOCK_TIME_NONE
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return (position, duration)
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def seek(self, location):
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"""
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@param location: time to seek to, in nanoseconds
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"""
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gst.debug("seeking to %r" % location)
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event = gst.event_new_seek(1.0, gst.FORMAT_TIME,
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gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
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gst.SEEK_TYPE_SET, location,
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gst.SEEK_TYPE_NONE, 0)
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res = self.player.send_event(event)
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if res:
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gst.info("setting new stream time to 0")
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self.player.set_new_stream_time(0L)
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else:
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gst.error("seek to %r failed" % location)
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def pause(self):
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gst.info("pausing player")
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self.player.set_state(gst.STATE_PAUSED)
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self.playing = False
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def play(self):
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gst.info("playing player")
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self.player.set_state(gst.STATE_PLAYING)
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self.playing = True
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def stop(self):
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self.player.set_state(gst.STATE_NULL)
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gst.info("stopped player")
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def get_state(self, timeout=1):
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return self.player.get_state(timeout=timeout)
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def is_playing(self):
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return self.playing
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class VideoWidget(gtk.DrawingArea):
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def __init__(self):
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gtk.DrawingArea.__init__(self)
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self.imagesink = None
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self.unset_flags(gtk.DOUBLE_BUFFERED)
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def do_expose_event(self, event):
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if self.imagesink:
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self.imagesink.expose()
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return False
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else:
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return True
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def set_sink(self, sink):
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assert self.window.xid
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self.imagesink = sink
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self.imagesink.set_xwindow_id(self.window.xid)
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class PlayerWindow(gtk.Window):
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UPDATE_INTERVAL = 500
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def __init__(self):
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gtk.Window.__init__(self)
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self.set_default_size(410, 325)
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self.create_ui()
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self.player = GstPlayer(self.videowidget)
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def on_eos():
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self.player.seek(0L)
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self.play_toggled()
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self.player.on_eos = lambda *x: on_eos()
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self.update_id = -1
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self.changed_id = -1
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self.seek_timeout_id = -1
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self.p_position = gst.CLOCK_TIME_NONE
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self.p_duration = gst.CLOCK_TIME_NONE
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def on_delete_event():
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self.player.stop()
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gtk.main_quit()
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self.connect('delete-event', lambda *x: on_delete_event())
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def load_file(self, location):
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self.player.set_location(location)
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def create_ui(self):
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vbox = gtk.VBox()
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self.add(vbox)
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self.videowidget = VideoWidget()
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vbox.pack_start(self.videowidget)
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hbox = gtk.HBox()
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vbox.pack_start(hbox, fill=False, expand=False)
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self.pause_image = gtk.image_new_from_stock(gtk.STOCK_MEDIA_PAUSE,
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gtk.ICON_SIZE_BUTTON)
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self.pause_image.show()
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self.play_image = gtk.image_new_from_stock(gtk.STOCK_MEDIA_PLAY,
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gtk.ICON_SIZE_BUTTON)
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self.play_image.show()
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self.button = button = gtk.Button()
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button.add(self.play_image)
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button.set_property('can-default', True)
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button.set_focus_on_click(False)
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button.show()
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hbox.pack_start(button, False)
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button.set_property('has-default', True)
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button.connect('clicked', lambda *args: self.play_toggled())
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self.adjustment = gtk.Adjustment(0.0, 0.00, 100.0, 0.1, 1.0, 1.0)
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hscale = gtk.HScale(self.adjustment)
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hscale.set_digits(2)
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hscale.set_update_policy(gtk.UPDATE_CONTINUOUS)
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hscale.connect('button-press-event', self.scale_button_press_cb)
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hscale.connect('button-release-event', self.scale_button_release_cb)
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hscale.connect('format-value', self.scale_format_value_cb)
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hbox.pack_start(hscale)
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self.hscale = hscale
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self.videowidget.connect_after('realize',
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lambda *x: self.play_toggled())
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def play_toggled(self):
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self.button.remove(self.button.child)
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if self.player.is_playing():
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self.player.pause()
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self.button.add(self.play_image)
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else:
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self.player.play()
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if self.update_id == -1:
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self.update_id = gobject.timeout_add(self.UPDATE_INTERVAL,
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self.update_scale_cb)
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self.button.add(self.pause_image)
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def scale_format_value_cb(self, scale, value):
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if self.p_duration == -1:
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real = 0
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else:
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real = value * self.p_duration / 100
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seconds = real / gst.SECOND
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return "%02d:%02d" % (seconds / 60, seconds % 60)
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def scale_button_press_cb(self, widget, event):
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# see seek.c:start_seek
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gst.debug('starting seek')
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self.button.set_sensitive(False)
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self.was_playing = self.player.is_playing()
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if self.was_playing:
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self.player.pause()
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# don't timeout-update position during seek
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if self.update_id != -1:
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gobject.source_remove(self.update_id)
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self.update_id = -1
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# make sure we get changed notifies
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if self.changed_id == -1:
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self.changed_id = self.hscale.connect('value-changed',
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self.scale_value_changed_cb)
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def scale_value_changed_cb(self, scale):
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# see seek.c:seek_cb
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real = long(scale.get_value() * self.p_duration / 100) # in ns
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gst.debug('value changed, perform seek to %r' % real)
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self.player.seek(real)
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# allow for a preroll
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self.player.get_state(timeout=50*gst.MSECOND) # 50 ms
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def scale_button_release_cb(self, widget, event):
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# see seek.cstop_seek
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widget.disconnect(self.changed_id)
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self.changed_id = -1
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self.button.set_sensitive(True)
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if self.seek_timeout_id != -1:
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gobject.source_remove(self.seek_timeout_id)
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self.seek_timeout_id = -1
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else:
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gst.debug('released slider, setting back to playing')
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if self.was_playing:
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self.player.play()
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if self.update_id != -1:
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self.error('Had a previous update timeout id')
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else:
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self.update_id = gobject.timeout_add(self.UPDATE_INTERVAL,
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self.update_scale_cb)
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def update_scale_cb(self):
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self.p_position, self.p_duration = self.player.query_position()
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if self.p_position != gst.CLOCK_TIME_NONE:
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value = self.p_position * 100.0 / self.p_duration
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self.adjustment.set_value(value)
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return True
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def main(args):
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def usage():
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sys.stderr.write("usage: %s URI-OF-MEDIA-FILE\n" % args[0])
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sys.exit(1)
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# Need to register our derived widget types for implicit event
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# handlers to get called.
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gobject.type_register(PlayerWindow)
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gobject.type_register(VideoWidget)
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w = PlayerWindow()
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if len(args) != 2:
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usage()
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if not gst.uri_is_valid(args[1]):
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sys.stderr.write("Error: Invalid URI: %s\n" % args[1])
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sys.exit(1)
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w.load_file(args[1])
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w.show_all()
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gtk.main()
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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