add lisp packages

lisp/emacs-application-framework/app/video-player/buffer.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright (C) 2018 Andy Stewart
+#
+# Author:     Andy Stewart <lazycat.manatee@gmail.com>
+# Maintainer: Andy Stewart <lazycat.manatee@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from PyQt5.QtCore import QSizeF, Qt, QUrl
+from PyQt5.QtGui import QBrush, QColor
+from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
+from PyQt5.QtMultimediaWidgets import QGraphicsVideoItem
+from PyQt5.QtWidgets import QWidget, QGraphicsScene, QGraphicsView, QVBoxLayout
+from core.buffer import Buffer
+from core.utils import interactive
+
+class AppBuffer(Buffer):
+    def __init__(self, buffer_id, url, config_dir, arguments, emacs_var_dict, module_path):
+        Buffer.__init__(self, buffer_id, url, arguments, emacs_var_dict, module_path, True)
+
+        self.add_widget(VideoPlayerWidget())
+        self.buffer_widget.play(url)
+
+        self.build_all_methods(self.buffer_widget)
+
+    def all_views_hide(self):
+        # Pause video before all views hdie, otherwise will got error "Internal data stream error".
+        if self.buffer_widget.media_player.state() == QMediaPlayer.PlayingState:
+            self.buffer_widget.media_player.pause()
+            self.buffer_widget.video_need_replay = True
+
+    def some_view_show(self):
+        if self.buffer_widget.video_need_replay is True:
+            self.buffer_widget.media_player.play()
+
+    def save_session_data(self):
+        return str(self.buffer_widget.media_player.position())
+
+    def restore_session_data(self, session_data):
+        position = int(session_data)
+        self.buffer_widget.media_player.setPosition(position)
+
+    def toggle_play(self):
+        if self.buffer_widget.media_player.state() == QMediaPlayer.PlayingState:
+            self.buffer_widget.media_player.pause()
+            self.buffer_widget.video_need_replay = False
+        else:
+            self.buffer_widget.media_player.play()
+            self.buffer_widget.video_need_replay = True
+
+    def destroy_buffer(self):
+        self.buffer_widget.media_player.pause()
+
+        super().destroy_buffer()
+
+class VideoPlayerWidget(QWidget):
+
+    def __init__(self, parent=None):
+        super(VideoPlayerWidget, self).__init__(parent)
+
+        self.scene = QGraphicsScene(self)
+        self.scene.setBackgroundBrush(QBrush(QColor(0, 0, 0, 255)))
+        self.graphics_view = QGraphicsView(self.scene)
+        self.graphics_view.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+        self.graphics_view.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
+        self.graphics_view.setFrameStyle(0)
+        self.graphics_view.setStyleSheet("QGraphicsView {background: transparent; border: 3px; outline: none;}")
+        self.video_item = QGraphicsVideoItem()
+        self.scene.addItem(self.video_item)
+
+        self.layout = QVBoxLayout(self)
+        self.layout.setContentsMargins(0, 0, 0, 0)
+        self.layout.addWidget(self.graphics_view)
+
+        self.media_player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
+        self.media_player.setVideoOutput(self.video_item)
+
+        self.video_need_replay = False
+        self.video_seek_durcation = 3000 # in milliseconds
+
+    def resizeEvent(self, event):
+        self.video_item.setSize(QSizeF(event.size().width(), event.size().height()))
+        QWidget.resizeEvent(self, event)
+
+    def play(self, url):
+        self.media_player.setMedia(QMediaContent(QUrl.fromLocalFile(url)))
+        self.media_player.play()
+
+    @interactive()
+    def play_forward(self):
+        video_position = self.media_player.position()
+        self.media_player.setPosition(video_position + self.video_seek_durcation)
+
+    @interactive()
+    def play_backward(self):
+        video_position = self.media_player.position()
+        self.media_player.setPosition(max(video_position - self.video_seek_durcation, 0))