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decompress Yay0s and extract PRESJPEGs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| #!/usr/bin/env python3 | ||
|
|
||
| import sys | ||
| import re | ||
| import os | ||
| from pathlib import Path | ||
| import crunch64 | ||
|
|
||
| # PERS-SZP decompressor v0.1 (WIP) | ||
| # Usage: decompress_persszp.py [path to PERS-SZP file] | ||
|
|
||
| # Read a big endian 32-bit value from a bytearray file with a given offset. | ||
| def read_32_be_value(file_arr, i): | ||
| return (file_arr[i + 0] << 24) + (file_arr[i + 1] << 16) \ | ||
| + (file_arr[i + 2] << 8) + (file_arr[i + 3]) | ||
|
|
||
| assets_path = "assets/us/" | ||
|
|
||
| filepath = Path(sys.argv[1]) | ||
| filename = os.path.splitext(os.path.basename(filepath))[0] | ||
|
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| file = open(filepath, 'rb') | ||
| file_header = bytearray(file.read(0xC)) # First, we need to fetch the header size. This is right after the magic part of the header. | ||
|
|
||
| # Check for 50 45 52 53 2D 53 5A 50, which is "PERS-SZP" | ||
| if file_header[0] != 0x50 or file_header[1] != 0x45 or file_header[2] != 0x52 or file_header[3] != 0x53 or file_header[4] != 0x2D or file_header[5] != 0x53 or file_header[6] != 0x5A or file_header[7] != 0x50: | ||
| print(filepath, "File magic is NOT 'PERS-SZP'. Please pass a valid file.") | ||
| sys.exit(1) | ||
|
|
||
| header_size = read_32_be_value(file_header, 8) | ||
| # Now that we have the header size, seek past the header. | ||
| file.seek(header_size, os.SEEK_SET) | ||
| yay0_file = file.read() | ||
|
|
||
| decompressed = crunch64.yay0.decompress(yay0_file) | ||
| file.close() | ||
| file = open(filepath, 'wb') | ||
| file.write(decompressed) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| #!/usr/bin/env python3 | ||
|
|
||
| import sys | ||
| import re | ||
| import os | ||
| from pathlib import Path | ||
| import crunch64 | ||
|
|
||
| # PRESJPEG extractor | ||
| # Usage: decompress_presjpeg.py [path to PRESJPEG file] | ||
|
|
||
| # Read a big endian 32-bit value from a bytearray file with a given offset. | ||
| def read_32_be_value(file_arr, i): | ||
| return (file_arr[i + 0] << 24) + (file_arr[i + 1] << 16) \ | ||
| + (file_arr[i + 2] << 8) + (file_arr[i + 3]) | ||
|
|
||
| assets_path = "assets/us/" | ||
|
|
||
| filepath = Path(sys.argv[1]) | ||
| filename = os.path.splitext(os.path.basename(filepath))[0] | ||
|
|
||
| file = open(filepath, 'rb') | ||
| file_header = bytearray(file.read(0xC)) # First, we need to fetch the header size. This is right after the magic part of the header. | ||
|
|
||
| # Check for 50 52 45 53 4A 50 45 47, which is "PRESJPEG" | ||
| if file_header[0] != 0x50 or file_header[1] != 0x52 or file_header[2] != 0x45 or file_header[3] != 0x53 or file_header[4] != 0x4A or file_header[5] != 0x50 or file_header[6] != 0x45 or file_header[7] != 0x47: | ||
| print(filepath, "File magic is NOT 'PRESJPEG'. Please pass a valid file.") | ||
| sys.exit(1) | ||
|
|
||
| header_size = read_32_be_value(file_header, 8) | ||
| file.seek(header_size, os.SEEK_SET) | ||
| jpeg_file = bytearray(file.read()) | ||
| file.close() | ||
| file = open(filepath, 'wb') | ||
| file.write(jpeg_file) | ||
| filepath.rename(filepath.with_suffix('.jpeg')) |
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