class VideoPlaybackDevice(Filter):
playbackStarted = Signal()
playbackPaused = Signal()
sequenceOpened = Signal(str, QDateTime, QDateTime, list)
currentTimestampChanged = Signal(QDateTime)
def __init__(self, environment):
super().__init__(False, False, environment)
self.video_out = OutputPort(False, "video", environment)
self.audio_out = OutputPort(False, "audio", environment)
self.addStaticPort(self.video_out)
self.addStaticPort(self.audio_out)
self.filename = self.propertyCollection().defineProperty(
"filename", "", "avi file name")
def newDuration(self, newDuration):
logger.debug("newDuration %s", newDuration)
self.sequenceOpened.emit(self.filename,
QDateTime.fromMSecsSinceEpoch(0),
QDateTime.fromMSecsSinceEpoch(newDuration),
["video"])
def currentMediaChanged(self, media):
logger.debug("currentMediaChanged videoAv=%s audioAv=%s",
self.player.isVideoAvailable(),
self.player.isAudioAvailable())
def _openVideo(self):
logger.debug("entering _openVideo")
self.player = QMediaPlayer(None, QMediaPlayer.VideoSurface)
self.videoOutput = DummyVideoSurface(self.player)
#self.videoOutput = QVideoWidget()
#self.videoOutput.show()
self.player.setVideoOutput(self.videoOutput)
#self.player.setMuted(True)
self.player.durationChanged.connect(self.newDuration)
self.player.currentMediaChanged.connect(self.currentMediaChanged)
self.player.setMedia(QUrl.fromLocalFile(self.filename))
logger.debug("leaving _openVideo; videoAv=%s audioAv=%s",
self.player.isVideoAvailable(),
self.player.isAudioAvailable())
def _closeVideo(self):
try:
del self.player
del self.playlist
except:
pass
def onStart(self):
ctrlSrv = Services.getService("PlaybackControl")
ctrlSrv.setupConnections(self)
self.playbackPaused.emit()
if self.filename != "":
self._openVideo()
def onStop(self):
ctrlSrv = Services.getService("PlaybackControl")
ctrlSrv.removeConnections(self)
self._closeVideo()
@Slot()
def startPlayback(self):
self.player.play()
self.playbackStarted.emit()
logger.debug("leaving startPlayback; videoAv=%s audioAv=%s",
self.player.isVideoAvailable(),
self.player.isAudioAvailable())
@Slot()
def pausePlayback(self):
self.player.pause()
self.playbackPaused.emit()
def newDataEvent(self):
t = time.monotonic()
if self.lastSendTime is not None:
if t - self.lastSendTime < self.timeout_ms * 1e-3:
# we are still earlier than the requested framerate
return
self.lastSendTime = t
self.counter += 1
c = "Sample %d" % self.counter
s = DataSample(c.encode("utf8"), "text/utf8",
int(time.time() / DataSample.TIMESTAMP_RES))
logging.getLogger(__name__).info("transmit: %s", c)
self.beforeTransmit(s)
self.outPort.transmit(s)
self.afterTransmit()
def stepForward(self):
pass
def stepBackward(self):
pass
def seekBeginning(self):
pass
def seekEnd(self):
pass
def seekTime(self, timestamp):
pass
def setSequence(self, filename):
self.filename
def setTimeFactor(self, factor):
pass
class Sound:
"""Loads a sound from the specified URL.
Supports whatever audio formats that PySide2 supports (depending on locally-installed codecs).
No error is raised if the file isn't found or is of an unsupported format.
Sounds are tracked
:param url: the URL to load the sound from, can be a local file
"""
def __init__(self, url):
# type: (str) -> None
self.__url = url # Only used for debugging
# Tell the app not to quit while this sound is loading, since it is plausible that a user is using sounds
# without using a frame or any timers:
TheApp.add_tracked(self)
self.__player = QMediaPlayer(TheApp, flags=QMediaPlayer.LowLatency)
self.__player.setAudioRole(QAudio.GameRole)
self.__player.mediaStatusChanged.connect(self.__on_status_changed)
self.__player.error.connect(self.__on_status_changed)
req = request(url)
content = QMediaContent(req)
self.__player.setMedia(content)
self.__sound_loaded = False
self.__play_requested = False
def __on_status_changed(self, _):
# type: (QMediaPlayer.MediaStatus) -> None
"""Checks if the sound is loaded.
If the sound has loaded without error, and the user has already told it to start playing, this will start the
sound playing.
If there was any failure in loading the sound, this is recorded, and the sound will never be
able to be played. TheApp will also be notified that it can close if this sound is all it is waiting for.
This event is also triggered by other status changes. The only other one that matters is the EndOfMedia status.
In this case, TheApp is also told that it can close.
:param _: (unused) media status object
"""
error = self.__player.error()
status = self.__player.mediaStatus()
if status < QMediaPlayer.LoadedMedia:
return
if error == QMediaPlayer.NoError and QMediaPlayer.LoadedMedia <= status < QMediaPlayer.InvalidMedia:
# Check if the media is actually an audio file that is playable
if self.__player.isAudioAvailable():
self.__sound_loaded = True
if self.__play_requested and status != QMediaPlayer.EndOfMedia:
# Play and don't do anything else now
self.play()
return
else:
self.__sound_loaded = False
self.__play_requested = False
TheApp.remove_tracked(self)
def play(self):
"""Starts playing a sound, or restarts playing it at the point it was paused."""
if self.__sound_loaded:
self.__player.play()
TheApp.add_tracked(self)
self.__play_requested = True
def pause(self):
"""Stops the playing of the sound. Playing can be restarted at the stopped point with :meth:`play`."""
if self.__sound_loaded:
self.__player.pause()
TheApp.remove_tracked(self)
self.__play_requested = False
def rewind(self):
"""Stops playing the sound, makes it so the next :meth:`play` will start playing the sound at the beginning."""
if self.__sound_loaded:
self.__player.stop()
TheApp.remove_tracked(self)
self.__play_requested = False
def set_volume(self, volume):
# type: (float) -> None
"""Changes the volume for the sound to be the given level on a 0 (silent) – 1.0 (maximum) scale. Default is 1.
:param volume: the volume to set
"""
assert 0.0 <= volume <= 1.0, "volume must be given in range 0-1 inclusive"
self.__player.setVolume(int(100 * volume))
