Mercurial > touhou-doc
annotate 06/t6rp.xhtml @ 13:2925b0e246c6 default tip
Fix a lot of things, and add a TODO.
| author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
|---|---|
| date | Fri, 17 Feb 2012 12:54:08 +0100 |
| parents | 9f0e37b7eeab |
| children |
| rev | line source |
|---|---|
| 8 | 1 <?xml version="1.0" encoding="utf-8"?> |
| 2 <?xml-stylesheet type="text/css" href="../style.css"?> | |
| 3 <!DOCTYPE html> | |
| 4 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> | |
| 5 <head> | |
| 6 <title>T6RP format</title> | |
| 7 </head> | |
| 8 <body> | |
| 9 <h1>T6RP format</h1> | |
| 10 <p>The T6RP format is the replay format used by EoSD.</p> | |
| 11 | |
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2925b0e246c6
Fix a lot of things, and add a TODO.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
11
diff
changeset
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12 <p>It is composed of a header and an “encrypted” data section, which is itself composed of a header, per-stage structures and lists of keystates.</p> |
| 8 | 13 |
| 14 | |
| 15 <h2>Header</h2> | |
| 16 <pre> | |
| 17 typedef struct { | |
| 18 char magic[4]; // T6RP | |
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2925b0e246c6
Fix a lot of things, and add a TODO.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
11
diff
changeset
|
19 uint16_t version; // 0x0102 for 1.02h |
| 8 | 20 uint8_t player; // 0 = ReimuA, 1 = ReimuB, 2 = MarisaA, 3 = MarisaB |
| 21 uint8_t rank; // 0 = Easy, 3 = Lunatic, 4 = Extra | |
| 22 uint32_t checksum; // (0x3f000318 + key + sum(c for c in decrypted_data)) % (2 ** 32) | |
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9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
23 uint16_t unknown2; //TODO: seems to be ignored by the game. |
| 8 | 24 uint8_t key; |
| 25 char crypted_data[]; // crypted(a, i) = (a + key + 7*i) % 256 | |
| 26 // decrypted(c, i) = (c - key - 7*i) % 256 | |
| 27 } thrpy6_header_t; | |
| 28 </pre> | |
| 29 | |
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9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
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30 <h2>Decrypting the data section</h2> |
| 8 | 31 <p>As stated earlier, the data section is encrypted. Luckily, this encryption is quite simplistic, and encrypting/decrypting it is easy (see this snippet of python3 code):</p> |
| 32 <pre> | |
| 33 def decrypt(key, data): | |
| 34 return bytes((c - key - 7 * i) % 256 for i, c in enumerate(data)) | |
| 35 | |
| 36 def encrypt(key, data): | |
| 37 return bytes((c + key + 7 * i) % 256 for i, c in enumerate(data)) | |
| 38 </pre> | |
| 39 | |
| 40 <h2>Encrypted header</h2> | |
| 41 <pre> | |
| 42 typedef struct { | |
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11
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
43 uint8_t unknown; //TODO: seems to be ignored by the game. Padding? |
| 8 | 44 char date[9]; // null-terminated string |
| 45 char name[9]; // null-terminated string | |
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11
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
46 uint16_t unknown2; //TODO: seems to be ignored by the game. Padding? |
|
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
47 uint32_t score; //TODO: Total score. seems to be ignored by the game. |
|
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
48 uint32_t unknown3; //TODO: seems to be ignored by the game. |
| 8 | 49 float slowdown_rate; // As a percentage, not a proper rate |
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11
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
50 uint32_t unknown4; //TODO: seems to be ignored by the game. |
| 8 | 51 uint32_t stage1_offset; // Offset of a thrpy6_stage_t from the start of the file (including the unencrypted header) |
| 52 uint32_t stage2_offset; | |
| 53 uint32_t stage3_offset; | |
| 54 uint32_t stage4_offset; | |
| 55 uint32_t stage5_offset; | |
| 56 uint32_t stage6_offset; | |
| 57 uint32_t stage7_offset; | |
| 58 } thrpy6_encrypted_header; | |
| 59 </pre> | |
| 60 | |
| 61 <h2>Stage entry</h2> | |
| 62 <pre> | |
| 63 typedef struct { | |
| 64 uint32_t score; | |
| 65 uint16_t random_seed; | |
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11
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
66 uint16_t unknown1; //TODO: seems to be ignored by the game. |
| 8 | 67 uint8_t power; |
| 68 int8_t lives; | |
| 69 int8_t bombs; | |
| 70 uint8_t difficulty; //TODO: WARNING: This has a huge effect on the game! | |
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13
2925b0e246c6
Fix a lot of things, and add a TODO.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
11
diff
changeset
|
71 // It is also called rank (but we use the term “difficulty” because “rank” is the official name for Easy/Normal/Hard/Lunatic/Extra) |
| 8 | 72 // See: http://en.touhouwiki.net/wiki/Embodiment_of_Scarlet_Devil/Gameplay#Rank |
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13
2925b0e246c6
Fix a lot of things, and add a TODO.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
11
diff
changeset
|
73 uint32_t unknown3; //TODO: seems to be ignored by the game. Padding? |
| 8 | 74 thrpy6_keystate_t keystates[]; |
| 75 } thrpy6_stage_t; | |
| 76 </pre> | |
| 77 | |
| 78 <h2>Keystates</h2> | |
| 79 <pre> | |
| 80 struct { | |
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11
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
81 uint32_t time; // Time of the event, most probably exprimed in frames. |
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9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
82 uint16_t keys; // 1 = shoot, 2 = bomb, 4 = focus, 8 = ?, 16 = up, 32 = down, 64 = left, 128 = right, 256 = skip dialogs |
|
9f0e37b7eeab
Some fixes in the replay format.
Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
parents:
8
diff
changeset
|
83 uint16_t unknown; //TODO: seems to be ignored by the game. |
| 8 | 84 } thrpy6_keystate_t; |
| 85 </pre> | |
| 86 </body> | |
| 87 </html> |