"""SoundInterval module: contains the SoundInterval class"""

from PandaModules import *
from Interval import *

class SoundInterval(Interval):
    # Name counter
    soundNum = 1
    # Class methods
    # Create a sound interval
    # If loop = 0, sound will play once, duration of the interval
    # equals the duration of the sound
    # If loop = 1, the sound will loop for the specified duration
    # If no duration is specified, sound will loop for the duration
    # of the sound, i.e. it will only play once.....usually, there
    # seems to be some timing in the audio such that the stop doesn't
    # kill the looping sound until the next time around if duration
    # of the interval equals duration of the sound
    def __init__(self, sound, loop = 0, duration = 0.0, name = None):
        """__init__(sound, loop, name)
        """
        # Record instance variables
	self.sound = sound
	self.loop = loop
        # If no duration given use sound's duration as interval's duration
        if duration == 0.0:
            duration = self.sound.length()
        # Generate unique name if necessary
	if (name == None):
	    name = 'Sound-%d' % SoundInterval.soundNum
	    SoundInterval.soundNum += 1
        # Initialize superclass
	Interval.__init__(self, name, duration)
    def updateFunc(self, t, event = IVAL_NONE):
	""" updateFunc(t, event)
        Go to time t
	"""
        # Update sound based on current time
        if (t >= self.getDuration()) or (event == IVAL_STOP):
            # If end of sound reached or stop event received, stop sound
            AudioManager.stop(self.sound)
        elif (event == IVAL_INIT):
            # IVAL_INIT event, start new sound
            # If its within a 10th of a second of the start,
            # start at the beginning
            if (t < 0.1):
                t = 0.0
            # Start sound
            AudioManager.play(self.sound, t)
            # Loop in necessary
	    if (self.loop):
		AudioManager.setLoop(self.sound, 1)