def playMusic(self, songName, volume=None, playheadTime=0.0, timeReference=TimeReference.ABSOLUTE, numRepeats=0, repeatPeriod=0):
'''
Play a piece of music (a sound file) at the SpeakEasy node.
@param songName: Name of sound file. (See getSongNames()).
@type songName: string
@param volume: Loudness at which to play. Default uses current volume. Else must be in range 0.0 to 1.0
@type volume: {None | float}
@param playheadTime: Offset in fractional seconds into where to start the song. Default: start at beginning.
@type playheadTime: float
@param timeReference: If playheadTime is provided, specifies whether the given time is intended as absolute (relative to the
beginning of the song), or relative to the current playhead position.
@type timeReference: TimeReference
@param numRepeats: Number of times the song is to be repeated after the first time. Use -1 to play forever.
@type numRepeats: int
@param repeatPeriod: Time period in fractional seconds to wait between repeats.
@type repeatPeriod: float
@raise TypeError: if any parameters are of incorrect type.
'''
if not SpeakeasyUtils.ensureType(numRepeats, int):
raise TypeError("Number of repeats must be an integer. Was " + str(numRepeats));
if not SpeakeasyUtils.ensureType(repeatPeriod, int) and not SpeakeasyUtils.ensureType(repeatPeriod, float):
raise TypeError("Repeat period must be an integer or a float. Was " + str(repeatPeriod));
if not SpeakeasyUtils.ensureType(playheadTime, int) and not SpeakeasyUtils.ensureType(playheadTime, float):
raise TypeError("Playhead must be an integer or a float. Was " + str(playheadTime));
if (timeReference != TimeReference.ABSOLUTE) and (timeReference != TimeReference.RELATIVE):
raise TypeError("Time reference must be TimeReference.RELATIVE, or TimeReference.ABSOLUTE. Was " + str(timeReference));
musicReqMsg = SpeakEasyMusic();
musicReqMsg.command = MusicCommands.PLAY;
musicReqMsg.song_name = songName;
musicReqMsg.time = playheadTime;
musicReqMsg.timeReference = timeReference;
if volume is None:
musicReqMsg.volume = -1.0;
else:
musicReqMsg.volume = volume;
with self.musicLock:
self.rosMusicRequestor.publish(musicReqMsg);
# Keep this block out of the lock! Thread registration will
# acquire the lock (thus leading to deadlock, if lock is owned here):
if numRepeats > 0 or numRepeats == -1:
musicRepeatThread = RoboComm.MusicReplayDemon(songName, volume, playheadTime, timeReference, numRepeats, repeatPeriod, self);
self.registerMusicRepeaterThread(musicRepeatThread);
musicRepeatThread.start();
def setPlayhead(self, playheadTime, timeReference=TimeReference.ABSOLUTE):
'''
Change the music playhead position to a particular time within a song.
Time may be specified absolute (i.e. relative to the start of the song),
or relative to the current playhead. The playhead may be changed during
playback, or while a song is paused.
@param playheadTime: New time where to position the playhead.
@type playheadTime: float
@param timeReference: TimeReference.ABSOLUTE or TimeReference.RELATIVE
@type timeReference: TimeReference.
@raise TypeError: if any parameters are of incorrect type.
'''
if not SpeakeasyUtils.ensureType(playheadTime, int) and not SpeakeasyUtils.ensureType(playheadTime, float):
raise TypeError("Playhead must be an int or float indicating seconds. Was " + str(playheadTime));
musicReqMsg = SpeakEasyMusic();
musicReqMsg.command = MusicCommands.SET_PLAYHEAD;
musicReqMsg.time = playheadTime;
musicReqMsg.timeReference = timeReference;
with self.musicLock:
self.rosMusicRequestor.publish(musicReqMsg);