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| author | Jon Arne Jørgensen <jonjon.arnearne@gmail.com> | 2017-04-18 20:39:38 +0200 |
|---|---|---|
| committer | Jon Arne Jørgensen <jonjon.arnearne@gmail.com> | 2017-04-18 20:39:38 +0200 |
| commit | 25c3b9e7f0a1c0638362385d2ca23645114d7417 (patch) | |
| tree | cc322e99391080d967fe0077f1cf6b95971bcb77 | |
| parent | 624671cbc940d4c6dbec21ac677e165e77805c25 (diff) | |
Fix a wrong assumption in the xor code
For reasons unknown, it was assumed that the xor key for PT10 -> PT12 would only be 128 bytes long.
This assumption was wrong.
I've encountered a ptx file that needed a 256 byte key to be correctly unxored.
This commit fixes the code so big ptx files can be correctly unxored.
| -rw-r--r-- | ptfformat.cc | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/ptfformat.cc b/ptfformat.cc index ec67fd3..0bc06bf 100644 --- a/ptfformat.cc +++ b/ptfformat.cc @@ -111,17 +111,16 @@ PTFFormat::load(std::string path, int64_t targetsr) { xor_type = ptfunxored[0x12]; xor_value = ptfunxored[0x13]; + xor_len = 256; // xor_type 0x01 = ProTools 5, 6, 7, 8 and 9 // xor_type 0x05 = ProTools 10, 11, 12 switch(xor_type) { case 0x01: xor_delta = gen_xor_delta(xor_value, 53, false); - xor_len = 256; break; case 0x05: xor_delta = gen_xor_delta(xor_value, 11, true); - xor_len = 128; break; default: fclose(fp); @@ -138,7 +137,7 @@ PTFFormat::load(std::string path, int64_t targetsr) { i = 0x14; fseek(fp, i, SEEK_SET); while (fread(&ct, 1, 1, fp) != 0) { - uint8_t xor_index = (xor_type == 0x01) ? i & 0xff : (i >> 12) & 0x7f; + uint8_t xor_index = (xor_type == 0x01) ? i & 0xff : (i >> 12) & 0xff; ptfunxored[i++] = ct ^ xxor[xor_index]; } fclose(fp); |