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eventslistpopulator.py
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eventslistpopulator.py
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from decimal import *
import binascii
import functions
def populate(trackNum, track):
eventsDict = {'trackNum': None,
'allEvents': [],
'f': [],
'8': [],
'9': [],
'a': [],
'b': [],
'c': [],
'd': [],
'e': [],}
#searches through the track string looking for meta and midi events.
#A new object is created for each event found and stored in the dict
#eventsDict.
#########################
#Event class definitions#
#########################
#There is a different class for each type of midi or meta event. Each class
#has a print_properties() method which prints the properties of the event
#and a collapse() method which collapses the event object back into a string
#and returns it.
#Midi events can be in running mode (indicated by runningMode == True,
#this will result in the event type being omitted from the collapsed string.
class MetaEvent(object):
def __init__(self, listLength, d, eventType, t, l, data, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'meta'
self.eventType = eventType
self.metaType = t
self.length = l
self.data = data
self.runningMode = ''
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) MetaEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"metaType: %s\n" % self.metaType + \
"length: %s\n" % self.length + \
"data: %s\n\n" % self.data
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = (self.deltaTime + self.eventType + self.metaType +
self.length + self.data)
return collapsed
class NoteEvent(object):
def __init__(self, listLength, d, eventType, noteNumber, velocity, runningMode, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'note'
self.eventType = eventType
self.noteNumber = noteNumber
self.velocity = velocity
self.runningMode = runningMode
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) NoteEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"eventType: %s\n" % self.eventType + \
"noteNumber: %s\n" % self.noteNumber + \
"velocity: %s\n" % self.velocity + \
"runningMode: %s\n\n" % self.runningMode
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = self.deltaTime
if self.runningMode == False:
collapsed = ''.join([collapsed, self.eventType])
collapsed = ''.join([collapsed, self.noteNumber, self.velocity])
return collapsed
class CcEvent(object):
def __init__(self, listLength, d, eventType, contNum, newVal, runningMode, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'cc'
self.eventType = eventType
self.contNum = contNum
self.newVal = newVal
self.runningMode = runningMode
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) CcEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"eventType: %s\n" % self.eventType + \
"contNumber: %s\n" % self.contNum + \
"new value: %s\n" % self.newVal + \
"runningMode: %s\n\n" % self.runningMode
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = self.deltaTime
if self.runningMode == False:
collapsed = ''.join([collapsed, self.eventType])
collapsed = ''.join([collapsed, self.contNum, self.newVal])
return collapsed
class PcEvent(object):
def __init__(self, listLength, d, eventType, newProgNum, runningMode, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'pc'
self.eventType = eventType
self.newProgNum = newProgNum
self.runningMode = runningMode
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) PcEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"eventType: %s\n" % self.eventType + \
"new prog number: %s\n" % self.newProgNum + \
"runningMode: %s\n\n" % self.runningMode
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = self.deltaTime
if self.runningMode == False:
collapsed = ''.join([collapsed, self.eventType])
collapsed = ''.join([collapsed, self.newProgNum])
return collapsed
class AtEvent(object):
def __init__(self, listLength, d, eventType, channelNum, runningMode, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'at'
self.eventType = eventType
self.channelNum = channelNum
self.runningMode = runningMode
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) AtEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"eventType: %s\n" % self.eventType + \
"channel number: %s\n" % self.channelNum + \
"runningMode: %s\n\n" % self.runningMode
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = self.deltaTime
if self.runningMode == False:
collapsed = ''.join([collapsed, self.eventType])
collapsed = ''.join([collapsed, self.channelNum])
return collapsed
class PwcEvent(object):
def __init__(self, listLength, d, eventType, bottom, top, runningMode, trackNum):
self.id = listLength
self.deltaTime = d
self.type = 'pwc'
self.eventType = eventType
self.bottom = bottom
self.top = top
self.runningMode = runningMode
self.cumulativeDeltaTime = cumulativeDeltaTime
self.realTime = None
self.trackNum = trackNum
def __repr__(self):
return "(%d) PwcEvent %d\n" % (self.trackNum, self.id) + \
"deltaTime: %s\n" % self.deltaTime + \
"cum delta time: %d\n" % self.cumulativeDeltaTime + \
"eventType: %s\n" % self.eventType + \
"bottom: %s\n" % self.bottom + \
"top: %s\n" % self.top + \
"runningMode: %s\n\n" % self.runningMode
def __cmp__(self, other):
if hasattr(other, 'cumulativeDeltaTime'):
return (self.cumulativeDeltaTime).__cmp__(other.cumulativeDeltaTime)
def collapse(self):
collapsed = self.deltaTime
if self.runningMode == False:
collapsed = ''.join([collapsed, self.eventType])
collapsed = ''.join([collapsed, self.bottom + self.top])
return collapsed
###############################################################################
#####################################
#Event object instantiation functions#
#####################################
#These functions create a new object for every midi or meta event found.
#They return the newly created object and advance the counter (i) by the
#correct amount for that object and return it.
#If an event is in running mode, the counter will be advanced by 2 less
#than otherwise.
def pop_meta_events(i, d, eventType, track, runningMode, trackNum):
dataEnd = 6+2*int(functions.return_range(track,i,4,6), 16)
metaEvent = MetaEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,2,4),
functions.return_range(track,i,4,6),
functions.return_range(track,i,6,dataEnd),
trackNum)
i += dataEnd
return (i, metaEvent)
def pop_note_events(i, d, eventType, track, runningMode, trackNum):
adj = functions.return_adjustment(runningMode)
#NoteEvent(listLength, d, eventType, noteNumber, velocity, runningMode, trackNum)
noteEvent = NoteEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,(2+adj),(4+adj)),
functions.return_range(track,i,(4+adj),(6+adj)),
runningMode, trackNum)
i += (6 + adj)
return (i, noteEvent)
def pop_cc_events(i, d, eventType, track, runningMode, trackNum):
adj = functions.return_adjustment(runningMode)
ccEvent = CcEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,(2+adj),(4+adj)),
functions.return_range(track,i,(4+adj),(6+adj)),
runningMode, trackNum)
i += (6 + adj)
return (i, ccEvent)
def pop_pc_events(i, d, eventType, track, runningMode, trackNum):
adj = functions.return_adjustment(runningMode)
pcEvent = PcEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,(2+adj),(4+adj)),
runningMode, trackNum)
i += (4 + adj)
return (i, pcEvent)
def pop_at_events(i, d, eventType, track, runningMode, trackNum):
adj = functions.return_adjustment(runningMode)
atEvent = AtEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,(2+adj),(4+adj)),
runningMode, trackNum)
i += (4 + adj)
return (i, atEvent)
def pop_pwc_events(i, d, eventType, track, runningMode, trackNum):
adj = functions.return_adjustment(runningMode)
pwcEvent = PwcEvent(len(eventsDict[eventType[0]]), d, eventType,
functions.return_range(track,i,(2+adj),(4+adj)),
functions.return_range(track,i,(4+adj),(6+adj)),
runningMode, trackNum)
i += (6 + adj)
return (i, pwcEvent)
###############################################################################
i=0
def event_decider(i, d, track, eventType, eventBuffer, runningMode, trackNum):
#This if statement decides which function to call based on eventType
#which is the byte (two characters) after the delta-time bytes. It also
#decides if the event is in running mode and if so, sets the
#runningMode boolean to True.
if int(eventType, 16) < 128:
#if eventType is less than 0x80 (128 in base 10) then the status
#byte of the event must have been omitted, the event is in running
#mode and takes the value of the status byte of the event before it.
runningMode = True
i, d, eventBuffer = event_decider(i, d, track, eventBuffer,
eventBuffer, runningMode, trackNum)
elif eventType == 'ff':
#meta event
i, event = pop_meta_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] in ['8','9','a']:
#note event
i, event = pop_note_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] == 'b':
#control change
i, event = pop_cc_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] == 'c':
#program change
i, event = pop_pc_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] == 'd':
#channel after-touch
i, event = pop_at_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] == 'e':
#pitch wheel change
i, event = pop_pwc_events(i, d, eventType, track, runningMode, trackNum)
eventBuffer = pop_eventsDict(event, eventType)
runningMode = False
elif eventType[0] == 'f' and eventType[1] != 'f':
#system common events, these should not be found in midi files
print "fx event found"
else:
print "This shouldn't have happened."
return (i, d, eventBuffer)
def pop_eventsDict(event, eventType):
eventsDict[eventType[0]].append(event)
eventsDict['allEvents'].append(event)
return eventType
eventBuffer = ''
runningMode = False
eventsDict['trackNum'] = trackNum
cumulativeDeltaTime = 0
while i < functions.check_length(track):
#takes account of the variable length of the delta time portion.
i, d = functions.get_delta_time(i, track)
cumulativeDeltaTime += d
#print "Cumulative Delta Time: ", cumulativeDeltaTime, "Delta Time: "
eventType = functions.get_event_type(i, track)
i, d, eventBuffer = event_decider(i, d, track, eventType, eventBuffer, runningMode, trackNum)
return eventsDict