Mercurial > touhou
comparison pytouhou/formats/fmt.py @ 325:cddfd3cb4797
Add music support for >PCB.
| author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
|---|---|
| date | Thu, 21 Jun 2012 15:01:01 +0200 |
| parents | |
| children | d8aab27a2ab2 |
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| 324:c412df42aa15 | 325:cddfd3cb4797 |
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| 1 # -*- encoding: utf-8 -*- | |
| 2 ## | |
| 3 ## Copyright (C) 2012 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> | |
| 4 ## | |
| 5 ## This program is free software; you can redistribute it and/or modify | |
| 6 ## it under the terms of the GNU General Public License as published | |
| 7 ## by the Free Software Foundation; version 3 only. | |
| 8 ## | |
| 9 ## This program is distributed in the hope that it will be useful, | |
| 10 ## but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 ## GNU General Public License for more details. | |
| 13 ## | |
| 14 | |
| 15 | |
| 16 from struct import unpack | |
| 17 | |
| 18 | |
| 19 class Track(object): | |
| 20 def __init__(self): | |
| 21 self.name = '' | |
| 22 | |
| 23 # loop info | |
| 24 self.intro = 0 | |
| 25 #self.unknown | |
| 26 self.start = 0 | |
| 27 self.duration = 0 | |
| 28 | |
| 29 # WAVE header | |
| 30 self.wFormatTag = 1 | |
| 31 self.wChannels = 2 | |
| 32 self.dwSamplesPerSec = 44100 | |
| 33 self.dwAvgBytesPerSec = 176400 | |
| 34 self.wBlockAlign = 4 | |
| 35 self.wBitsPerSample = 16 | |
| 36 | |
| 37 | |
| 38 class FMT(list): | |
| 39 @classmethod | |
| 40 def read(cls, file): | |
| 41 self = cls() | |
| 42 | |
| 43 file.seek(0) | |
| 44 while True: | |
| 45 track = Track() | |
| 46 track.name = unpack('<16s', file.read(16))[0] | |
| 47 if not ord(track.name[0]): | |
| 48 break | |
| 49 | |
| 50 # loop info | |
| 51 track.intro, unknown, track.start, track.duration = unpack('<IIII', file.read(16)) | |
| 52 | |
| 53 # WAVE header | |
| 54 (track.wFormatTag, | |
| 55 track.wChannels, | |
| 56 track.dwSamplesPerSec, | |
| 57 track.dwAvgBytesPerSec, | |
| 58 track.wBlockAlign, | |
| 59 track.wBitsPerSample) = unpack('<HHLLHH', file.read(16)) | |
| 60 | |
| 61 assert track.wFormatTag == 1 # We don’t support non-PCM formats | |
| 62 assert track.dwAvgBytesPerSec == track.dwSamplesPerSec * track.wBlockAlign | |
| 63 assert track.wBlockAlign == track.wChannels * track.wBitsPerSample // 8 | |
| 64 assert b'\00\00\00\00' == file.read(4) | |
| 65 | |
| 66 self.append(track) | |
| 67 | |
| 68 return self | |
| 69 |