Ajout du GUI

kivy/core/video/video_gstplayer.py

@@ -0,0 +1,140 @@
+'''
+Video Gstplayer
+===============
+
+.. versionadded:: 1.8.0
+
+Implementation of a VideoBase with Kivy :class:`~kivy.lib.gstplayer.GstPlayer`
+This player is the preferred player, using Gstreamer 1.0, working on both
+Python 2 and 3.
+'''
+
+try:
+    from kivy.lib.gstplayer import GstPlayer, get_gst_version
+except ImportError:
+    from kivy.core import handle_win_lib_import_error
+    handle_win_lib_import_error(
+        'VideoGstplayer', 'gst', 'kivy.lib.gstplayer._gstplayer')
+    raise
+from kivy.graphics.texture import Texture
+from kivy.core.video import VideoBase
+from kivy.logger import Logger
+from kivy.clock import Clock
+from kivy.compat import PY2
+from threading import Lock
+from functools import partial
+from os.path import realpath
+from weakref import ref
+
+if PY2:
+    from urllib import pathname2url
+else:
+    from urllib.request import pathname2url
+
+Logger.info('VideoGstplayer: Using Gstreamer {}'.format(
+    '.'.join(map(str, get_gst_version()))))
+
+
+def _on_gstplayer_buffer(video, width, height, data):
+    video = video()
+    # if we still receive the video but no more player, remove it.
+    if not video:
+        return
+    with video._buffer_lock:
+        video._buffer = (width, height, data)
+
+
+def _on_gstplayer_message(mtype, message):
+    if mtype == 'error':
+        Logger.error('VideoGstplayer: {}'.format(message))
+    elif mtype == 'warning':
+        Logger.warning('VideoGstplayer: {}'.format(message))
+    elif mtype == 'info':
+        Logger.info('VideoGstplayer: {}'.format(message))
+
+
+class VideoGstplayer(VideoBase):
+
+    def __init__(self, **kwargs):
+        self.player = None
+        self._buffer = None
+        self._buffer_lock = Lock()
+        super(VideoGstplayer, self).__init__(**kwargs)
+
+    def _on_gst_eos_sync(self):
+        Clock.schedule_once(self._do_eos, 0)
+
+    def load(self):
+        Logger.debug('VideoGstplayer: Load <{}>'.format(self._filename))
+        uri = self._get_uri()
+        wk_self = ref(self)
+        self.player_callback = partial(_on_gstplayer_buffer, wk_self)
+        self.player = GstPlayer(uri, self.player_callback,
+                                self._on_gst_eos_sync, _on_gstplayer_message)
+        self.player.load()
+
+    def unload(self):
+        if self.player:
+            self.player.unload()
+            self.player = None
+        with self._buffer_lock:
+            self._buffer = None
+        self._texture = None
+
+    def stop(self):
+        super(VideoGstplayer, self).stop()
+        self.player.stop()
+
+    def pause(self):
+        super(VideoGstplayer, self).pause()
+        self.player.pause()
+
+    def play(self):
+        super(VideoGstplayer, self).play()
+        self.player.set_volume(self.volume)
+        self.player.play()
+
+    def seek(self, percent, precise=True):
+        self.player.seek(percent)
+
+    def _get_position(self):
+        return self.player.get_position()
+
+    def _get_duration(self):
+        return self.player.get_duration()
+
+    def _set_volume(self, value):
+        self._volume = value
+        if self.player:
+            self.player.set_volume(self._volume)
+
+    def _update(self, dt):
+        buf = None
+        with self._buffer_lock:
+            buf = self._buffer
+            self._buffer = None
+        if buf is not None:
+            self._update_texture(buf)
+            self.dispatch('on_frame')
+
+    def _update_texture(self, buf):
+        width, height, data = buf
+
+        # texture is not allocated yet, create it first
+        if not self._texture:
+            self._texture = Texture.create(size=(width, height),
+                                           colorfmt='rgb')
+            self._texture.flip_vertical()
+            self.dispatch('on_load')
+
+        if self._texture:
+            self._texture.blit_buffer(
+                data, size=(width, height), colorfmt='rgb')
+
+    def _get_uri(self):
+        uri = self.filename
+        if not uri:
+            return
+        if '://' not in uri:
+            uri = 'file:' + pathname2url(realpath(uri))
+        return uri