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43 lines
1.8 KiB
C++
43 lines
1.8 KiB
C++
#ifndef MOCKTAIL_COMPAT_FMOD_OUTPUT_DEVICE_CONTRACT_H_
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#define MOCKTAIL_COMPAT_FMOD_OUTPUT_DEVICE_CONTRACT_H_
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#include <cstddef>
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#include <initializer_list>
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#include <string_view>
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namespace mocktail::compat {
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// The 2.738 integer-index selector adds a feature-flag dispatch before the
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// count/clamp/setDriver path. Keep the calling convention, count slot (5),
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// object offset (0x28), and branch into that path exact. Only relocated
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// addresses and non-local branch/call targets vary between builds.
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inline constexpr char kFmodDeviceListsSelectContract[] =
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"\x55\x48\x89\xe5\x41\x57\x41\x56\x41\x54\x53\x48\x83\xec\x50\x41"
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"\x89\xf7\x49\x89\xfe\x4c\x8b\x25\x00\x00\x00\x00\x49\x8b\x04\x24"
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"\x48\x89\x45\xd8\x80\x3d\x00\x00\x00\x00\x00\x74\x25\x49\x8b\x04"
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"\x24\x48\x3b\x45\xd8\x0f\x85\x00\x00\x00\x00\x4c\x89\xf7\x44\x89"
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"\xfe\x48\x83\xc4\x50\x5b\x41\x5c\x41\x5e\x41\x5f\x5d\xe9\x00\x00"
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"\x00\x00\x49\x8b\x06\x4c\x89\xf7\xff\x50\x28\x44\x39\xf8\x0f\x8e"
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"\x00\x00\x00\x00\x31\xdb\x45\x85\xff\x41\x0f\x4f\xdf\x49\x8b\x7e"
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"\x28\x89\xde\xe8\x00\x00\x00\x00";
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inline constexpr std::size_t kFmodDeviceListsSelectContractSize =
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sizeof(kFmodDeviceListsSelectContract) - 1;
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inline bool HasFmodDeviceListsSelectContract(std::string_view code) {
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if (code.size() < kFmodDeviceListsSelectContractSize) return false;
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for (std::size_t index = 0; index < kFmodDeviceListsSelectContractSize;
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++index) {
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bool relocated = false;
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for (const std::size_t start : {24, 38, 55, 78, 96, 116}) {
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if (index >= start && index < start + 4) relocated = true;
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}
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if (!relocated && code[index] != kFmodDeviceListsSelectContract[index])
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return false;
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}
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return true;
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}
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} // namespace mocktail::compat
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#endif // MOCKTAIL_COMPAT_FMOD_OUTPUT_DEVICE_CONTRACT_H_
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