def writeSong(self, index, song):
'''Writes a song to the ROM, if there is already a song
at the given index, this song will be overwritten.'''
rom = self.rom
voicegroup = song.voicegroup
tracks = song.getTracks()
print("> Writing song %d" %index)
#Step 1, check wheter there is a song to overwrite
self.assertSong(index)
#Step 2, free space: song header and all song tracks
self.truncSong(index)
print(" > Space freed")
#Step 3, find space
# TODO For now this tool stores an entire song at one location
# this could be separated in a later state of this software development.
headerlength = 2+2+4 #short trackscount + short unknown + pointer voicegroup
trackslength = 0
for track in tracks:
headerlength += 4 #pointer to track
trackslength += len(track) #one byte for each track instruction
newchunksize = headerlength+trackslength
newpointer = rom.findSpace(0x6b5640, newchunksize)
print (" > Storing at pointer %X"%newpointer)
#Step 4, write song and tracks
#4.1 Prepare all tracks and their pointers
romtracks = {}
tp = newpointer + headerlength
for track in tracks:
track = self.fixTrackPointer(tp, track)
romtracks[tp] = BBlock.fromBytes(track)
tp += len(track)
#TODO: Add trailing 000 00 or 0 (so song end is aligned at a group of 4 bytes)
#4.2 Generate the header
header = BBlock()
header.addByte(len(tracks)) # Number of tracks
header.addByte(song.numblks)
header.addByte(song.priority)
header.addByte(song.reverb)
header.addPointer(voicegroup) # Used voicegroup for track
for trackpointer in romtracks:
header.addPointer(trackpointer)
#4.3 Write header + tracks to rom
rom.write(newpointer, header)
rom.writeBlocks(romtracks)
#Step 5, update table
# -- todo: set newpointer in table as pointer to track index
self.updateSongTable(index, newpointer)
def writeSong(self, index, song):
'''Writes a song to the ROM, if there is already a song
at the given index, this song will be overwritten.'''
rom = self.rom
voicegroup = song.voicegroup
tracks = song.getTracks()
print("> Writing song %d" % index)
#Step 1, check wheter there is a song to overwrite
self.assertSong(index)
#Step 2, free space: song header and all song tracks
self.truncSong(index)
print(" > Space freed")
#Step 3, find space
# TODO For now this tool stores an entire song at one location
# this could be separated in a later state of this software development.
headerlength = 2 + 2 + 4 #short trackscount + short unknown + pointer voicegroup
trackslength = 0
for track in tracks:
headerlength += 4 #pointer to track
trackslength += len(track) #one byte for each track instruction
newchunksize = headerlength + trackslength
newpointer = rom.findSpace(0x6b5640, newchunksize)
print(" > Storing at pointer %X" % newpointer)
#Step 4, write song and tracks
#4.1 Prepare all tracks and their pointers
romtracks = {}
tp = newpointer + headerlength
for track in tracks:
track = self.fixTrackPointer(tp, track)
romtracks[tp] = BBlock.fromBytes(track)
tp += len(track)
#TODO: Add trailing 000 00 or 0 (so song end is aligned at a group of 4 bytes)
#4.2 Generate the header
header = BBlock()
header.addByte(len(tracks)) # Number of tracks
header.addByte(song.numblks)
header.addByte(song.priority)
header.addByte(song.reverb)
header.addPointer(voicegroup) # Used voicegroup for track
for trackpointer in romtracks:
header.addPointer(trackpointer)
#4.3 Write header + tracks to rom
rom.write(newpointer, header)
rom.writeBlocks(romtracks)
#Step 5, update table
# -- todo: set newpointer in table as pointer to track index
self.updateSongTable(index, newpointer)
def updateSongTable(self, trackid, pointer):
'''Rewrites a value in the songtable, so it plays the song at the given pointer.'''
p = self.tablepointer + 8*trackid
data = BBlock()
data.addPointer(pointer)
data.addInt(0x00)
self.rom.write(p, data)
def updateSongTable(self, trackid, pointer):
'''Rewrites a value in the songtable, so it plays the song at the given pointer.'''
p = self.tablepointer + 8 * trackid
data = BBlock()
data.addPointer(pointer)
data.addInt(0x00)
self.rom.write(p, data)