forked from openlp/openlp
313 lines
11 KiB
Python
313 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
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###############################################################################
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# OpenLP - Open Source Lyrics Projection #
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# --------------------------------------------------------------------------- #
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# Copyright (c) 2008-2017 OpenLP Developers #
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# --------------------------------------------------------------------------- #
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# This program is free software; you can redistribute it and/or modify it #
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# under the terms of the GNU General Public License as published by the Free #
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# Software Foundation; version 2 of the License. #
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# #
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# This program is distributed in the hope that it will be useful, but WITHOUT #
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or #
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for #
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# more details. #
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# #
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# You should have received a copy of the GNU General Public License along #
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# with this program; if not, write to the Free Software Foundation, Inc., 59 #
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# Temple Place, Suite 330, Boston, MA 02111-1307 USA #
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###############################################################################
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"""
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The :mod:`~openlp.core.ui.media.webkit` module contains our WebKit video player
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"""
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import logging
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from PyQt5 import QtGui, QtWebKitWidgets
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from openlp.core.common.settings import Settings
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from openlp.core.common.i18n import translate
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from openlp.core.ui.media import MediaState
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from openlp.core.ui.media.mediaplayer import MediaPlayer
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log = logging.getLogger(__name__)
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VIDEO_CSS = """
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#videobackboard {
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z-index:3;
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background-color: %(bgcolor)s;
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}
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#video {
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background-color: %(bgcolor)s;
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z-index:4;
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}
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"""
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VIDEO_JS = """
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function show_video(state, path, volume, variable_value){
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// Sometimes video.currentTime stops slightly short of video.duration and video.ended is intermittent!
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var video = document.getElementById('video');
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if(volume != null){
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video.volume = volume;
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}
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switch(state){
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case 'load':
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video.src = 'file:///' + path;
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video.load();
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break;
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case 'play':
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video.play();
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break;
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case 'pause':
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video.pause();
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break;
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case 'stop':
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show_video('pause');
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video.currentTime = 0;
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break;
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case 'close':
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show_video('stop');
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video.src = '';
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break;
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case 'length':
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return video.duration;
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case 'current_time':
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return video.currentTime;
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case 'seek':
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video.currentTime = variable_value;
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break;
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case 'isEnded':
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return video.ended;
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case 'setVisible':
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video.style.visibility = variable_value;
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break;
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case 'setBackBoard':
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var back = document.getElementById('videobackboard');
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back.style.visibility = variable_value;
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break;
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}
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}
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"""
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VIDEO_HTML = """
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<div id="videobackboard" class="size" style="visibility:hidden"></div>
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<video id="video" class="size" style="visibility:hidden" autobuffer preload></video>
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"""
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VIDEO_EXT = ['*.3gp', '*.3gpp', '*.3g2', '*.3gpp2', '*.aac', '*.flv', '*.f4a', '*.f4b', '*.f4p', '*.f4v', '*.mov',
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'*.m4a', '*.m4b', '*.m4p', '*.m4v', '*.mkv', '*.mp4', '*.ogv', '*.webm', '*.mpg', '*.wmv', '*.mpeg',
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'*.avi', '*.swf']
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AUDIO_EXT = ['*.mp3', '*.ogg']
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class WebkitPlayer(MediaPlayer):
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"""
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A specialised version of the MediaPlayer class, which provides a QtWebKit
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display.
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"""
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def __init__(self, parent):
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"""
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Constructor
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"""
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super(WebkitPlayer, self).__init__(parent, 'webkit')
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self.original_name = 'WebKit'
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self.display_name = '&WebKit'
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self.parent = parent
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self.can_background = True
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self.audio_extensions_list = AUDIO_EXT
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self.video_extensions_list = VIDEO_EXT
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def get_media_display_css(self):
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"""
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Add css style sheets to htmlbuilder
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"""
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background = QtGui.QColor(Settings().value('players/background color')).name()
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css = VIDEO_CSS % {'bgcolor': background}
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return css
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def get_media_display_javascript(self):
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"""
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Add javascript functions to htmlbuilder
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"""
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return VIDEO_JS
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def get_media_display_html(self):
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"""
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Add html code to htmlbuilder
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"""
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return VIDEO_HTML
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def setup(self, display):
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"""
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Set up the player
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:param display: The display to be updated.
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"""
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display.web_view.resize(display.size())
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display.web_view.raise_()
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self.has_own_widget = False
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def check_available(self):
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"""
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Check the availability of the media player.
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:return: boolean. True if available
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"""
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web = QtWebKitWidgets.QWebPage()
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# This script should return '[object HTMLVideoElement]' if the html5 video is available in webkit. Otherwise it
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# should return '[object HTMLUnknownElement]'
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return web.mainFrame().evaluateJavaScript(
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"Object.prototype.toString.call(document.createElement('video'));") == '[object HTMLVideoElement]'
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def load(self, display):
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"""
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Load a video
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:param display: The display to be updated.
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"""
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log.debug('load vid in Webkit Controller')
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controller = display.controller
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if display.has_audio and not controller.media_info.is_background:
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volume = controller.media_info.volume
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vol = float(volume) / float(100)
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else:
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vol = 0
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path = controller.media_info.file_info.absoluteFilePath()
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display.web_view.setVisible(True)
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js = 'show_video("load", "{path}", {vol});'.format(path=path.replace('\\', '\\\\'), vol=str(vol))
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display.frame.evaluateJavaScript(js)
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return True
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def resize(self, display):
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"""
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Resize the player
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:param display: The display to be updated.
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"""
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display.web_view.resize(display.size())
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def play(self, display):
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"""
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Play a video
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:param display: The display to be updated.
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"""
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controller = display.controller
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display.web_loaded = True
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start_time = 0
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if display.controller.is_live:
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if self.get_live_state() != MediaState.Paused and controller.media_info.start_time > 0:
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start_time = controller.media_info.start_time
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else:
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if self.get_preview_state() != MediaState.Paused and controller.media_info.start_time > 0:
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start_time = controller.media_info.start_time
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self.set_visible(display, True)
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display.frame.evaluateJavaScript('show_video("play");')
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if start_time > 0:
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self.seek(display, controller.media_info.start_time * 1000)
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self.set_state(MediaState.Playing, display)
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display.web_view.raise_()
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return True
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def pause(self, display):
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"""
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Pause a video
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:param display: The display to be updated.
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"""
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display.frame.evaluateJavaScript('show_video("pause");')
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self.set_state(MediaState.Paused, display)
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def stop(self, display):
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"""
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Stop a video
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:param display: The display to be updated.
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"""
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display.frame.evaluateJavaScript('show_video("stop");')
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self.set_state(MediaState.Stopped, display)
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def volume(self, display, volume):
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"""
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Set the volume
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:param display: The display to be updated.
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:param volume: The volume to be set.
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"""
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# 1.0 is the highest value
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if display.has_audio:
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vol = float(volume) / float(100)
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display.frame.evaluateJavaScript('show_video(null, null, %s);' % str(vol))
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def seek(self, display, seek_value):
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"""
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Go to a position in the video
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:param display: The display to be updated.
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:param seek_value: The value to be set.
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"""
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seek = float(seek_value) / 1000
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display.frame.evaluateJavaScript('show_video("seek", null, null, null, "%f");' % seek)
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def reset(self, display):
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"""
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Reset the player
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:param display: The display to be updated.
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"""
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display.frame.evaluateJavaScript('show_video("close");')
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self.set_state(MediaState.Off, display)
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def set_visible(self, display, visibility):
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"""
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Set the visibility
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:param display: The display to be updated.
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:param visibility: The visibility to be set.
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"""
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if visibility:
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is_visible = "visible"
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else:
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is_visible = "hidden"
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display.frame.evaluateJavaScript('show_video("setVisible", null, null, null, "%s");' % is_visible)
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def update_ui(self, display):
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"""
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Update the UI
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:param display: The display to be updated.
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"""
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controller = display.controller
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if display.frame.evaluateJavaScript('show_video("isEnded");'):
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self.stop(display)
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current_time = display.frame.evaluateJavaScript('show_video("current_time");')
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# check if conversion was ok and value is not 'NaN'
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if current_time and current_time != float('inf'):
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current_time = int(current_time * 1000)
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length = display.frame.evaluateJavaScript('show_video("length");')
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# check if conversion was ok and value is not 'NaN'
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if length and length != float('inf'):
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length = int(length * 1000)
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if current_time and length:
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controller.media_info.length = length
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controller.seek_slider.setMaximum(length)
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if not controller.seek_slider.isSliderDown():
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controller.seek_slider.blockSignals(True)
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controller.seek_slider.setSliderPosition(current_time)
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controller.seek_slider.blockSignals(False)
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def get_info(self):
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"""
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Return some information about this player
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"""
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part1 = translate('Media.player', 'Webkit is a media player which runs inside a web browser. This player '
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'allows text over video to be rendered.')
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part2 = translate('Media.player', 'Audio')
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part3 = translate('Media.player', 'Video')
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return part1 + '<br/> <strong>' + part2 + '</strong><br/>' + str(AUDIO_EXT) + '<br/><strong>' + part3 + \
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'</strong><br/>' + str(VIDEO_EXT) + '<br/>'
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