Small additions/changes I forgot to commit
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@ -273,6 +273,8 @@ class FF5Reader(QMainWindow):
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#zone_pxs += make_zone_pxs2(blocks, miniblocks, blockmaps, z, zone_px_cache)
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print('Zone pixmap cache results: {misses} misses, {hits} hits'.format(**zone_px_cache))
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perfcount()
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del block_cache
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del zone_px_cache
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print('Generating Battle backgrounds')
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battle_bgs = make_battle_backgrounds(ROM_jp)
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@ -17,18 +17,21 @@
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HEX_PREFIX = '#' # '#' '$' or '0x' are also nice
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def divceil(numerator, denominator):
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'''
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Reverse floor division for fast ceil
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'''
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return -(-numerator // denominator)
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def hex_length(i):
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'''
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String length of hexadecimal representation of integer
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'''
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return divceil(i.bit_length(), 4)
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def hex(num, digits=2):
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'''
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Consolidate hex formatting for consistency
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@ -36,11 +39,13 @@ def hex(num, digits=2):
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#return '{:0{}X}₁₆'.format(num, digits)
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return HEX_PREFIX + '{:0{}X}'.format(num, digits)
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def indirect(rom, start, length=2):
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def indirect(rom, start, length=2, endian='little'):
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'''
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Read little-endian value at start address in rom
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'''
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return int.from_bytes(rom[start:start+length], 'little')
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return int.from_bytes(rom[start:start+length], endian)
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def parse_struct(rom, offset, structure):
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'''
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@ -97,3 +102,81 @@ def decompress_lzss(rom, start, header=False, length=None):
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buffer_p = (buffer_p+1) % 0x800
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offset = (offset+1) % 0x800
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return bytes(output[:uncompressed_length])
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def decompress_lzss_FFVa(rom, start, header=False, length=None):
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'''
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Oops, it's just GBA BIOS decompression functions
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see https://web.archive.org/web/20130323133944/http://nocash.emubase.de/gbatek.htm#biosdecompressionfunctions
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'''
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ptr = start
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if length:
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uncompressed_length = length
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else:
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uncompressed_length = indirect(rom, start, endian='big')
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ptr += 2
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output = []
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while len(output) < uncompressed_length:
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bitmap_byte = rom[ptr]
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ptr += 1
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for i in reversed(range(8)):
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bit = (bitmap_byte >> i) & 1
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if not bit:
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b = rom[ptr]
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ptr += 1
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output.append(b)
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else:
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b1 = rom[ptr]
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b2 = rom[ptr+1]
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ptr += 2
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length = ((b1 & 0xF0) >> 4) + 3
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trackback = -1 - (b2 + ((b1 & 0x0F) << 8))
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try:
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for j in range(length):
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output.append(output[trackback])
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except:
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print(len(output), f'0x{ptr:X}', f'0x{b1:02X}{b2:02X}', trackback)
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raise
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print(f'0x{ptr:X}')
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return bytes(output[:uncompressed_length])
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def findall(rom, string):
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results = []
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start = 0
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while True:
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val = rom.find(string, start)
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if val < 0:
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return results
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results.append(val)
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start = val + 1
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def parse_ips(data):
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assert data[:5] == b'PATCH' and data[-3:] == b'EOF', 'File header and footer missing!'
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patches = {}
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ptr = 5
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while ptr < len(data)-6:
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address = int.from_bytes(data[ptr:ptr+3], 'big')
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length = int.from_bytes(data[ptr+3:ptr+5], 'big')
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if length > 0:
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payload = data[ptr+5:ptr+5+length]
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ptr += 5 + length
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else:
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repeats = data[ptr+5:ptr+7]
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payload = data[ptr+7] * repeats
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ptr += 8
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patches[address] = payload
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return patches
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if __name__ == '__main__':
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with open('2564 - Final Fantasy V Advance (U)(Independent).gba', 'rb') as file:
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ROM = file.read()
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landmark = ROM.find(b'FINAL FANTASY V ADVANCE SYGMAB')
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try:
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with open('Final Fantasy V Advance (Europe) (En,Fr,De,Es,It)-spritehack.ips', 'rb') as file:
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spritehack_ips = file.read()
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print('spritehack_ips loaded')
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except:
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pass
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@ -26,6 +26,8 @@ import sys
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from midiutil import MIDIFile
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from includes.helpers import indirect, hex
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from includes.const import BGM_Tracks_Safe
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import struct
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import wave
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def generate_pointer_set(data):
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'''
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@ -51,14 +53,27 @@ def analyse_sample(data, pointer):
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def decode_brr(data):
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range = data[0] >> 4
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'''
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Decodes a single 9byte BRR packet
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'''
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_range = data[0] >> 4
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filter_designation = (data[0] & 0x0C) >> 2
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loop = bool(data[0] & 0x02)
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end = bool(data[0] & 0x01)
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samples = []
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for i in range(8):
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samples.append((data[1+range] >> 4) << range)
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samples.append((data[1+range] & 0x0F) << range)
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for i in data[1:]:
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b1 = (i >> 4)
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b2 = (i & 0x0F)
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# Sign-extend
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if b1 >= 8:
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b1 |= 0xFFF0
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if b2 >= 8:
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b2 |= 0xFFF0
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samples.append((b1 << _range) & 0xFFFF)
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samples.append((b2 << _range) & 0xFFFF)
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# For filter arithmetic the samples need to be in signed form.
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sample_bytes = struct.pack('<'+'H'*16, *samples)
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samples = struct.unpack('<'+'h'*16, sample_bytes)
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return (samples, loop, end, filter_designation)
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@ -275,6 +290,46 @@ def get_song_data(rom, id):
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#data = rom[offset+2:offset+2+size]
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return tracks
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def get_sample_data(rom, id):
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lookup_offset = 0x043C6F + (id*3)
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offset = indirect(rom, lookup_offset, 3)-0xC00000
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size = indirect(rom, offset)
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data = rom[offset+2:offset+2+size]
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return data
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def clamp_short(num):
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return min(max(num, -0x7FFF), 0x7FFF)
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def make_sample(rom, id):
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data = get_sample_data(rom, id)
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packets = [data[i:i+9] for i in range(0, len(data), 9)]
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samples = [0, 0] # Two zero samples for filter purposes, strip them from the actual output
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for p in packets:
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c_samples, loop, end, filter = decode_brr(p)
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samples += c_samples
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if filter == 1:
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for i in range(-8, 0, 1):
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samples[i] = clamp_short(samples[i] + (samples[i-1]*15)//16)
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elif filter == 2:
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for i in range(-8, 0, 1):
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samples[i] = clamp_short(samples[i] + (samples[i-1]*61)//32 - (samples[i-2]*15)//16 )
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elif filter == 3:
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for i in range(-8, 0, 1):
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samples[i] = clamp_short(samples[i] + (samples[i-1]*115)//64 - (samples[i-2]*13)//16 )
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if end:
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break
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return samples[2:]
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def make_sample_wav(rom, id):
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samples = make_sample(rom, id)
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filename = 'Sample{}.wav'.format(id)
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with wave.open(filename, 'wb') as file:
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file.setnchannels(1)
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file.setframerate(8000)
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file.setsampwidth(2)
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sample_bytes = struct.pack('<'+'h'*len(samples), *samples)
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file.writeframes(sample_bytes)
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def make_midi_file(tracks, filename='test.mid'):
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m = SPCParser().parse(tracks)
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with open(filename, 'wb') as file:
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