Function at 0x505a50
Capabilities:
Create thread
Resume thread

Disassembly:
mov eax, dword [esp + 8]
sub esp, 8
cmp eax, 0x24
push ebx
push ebp
push esi
push edi
jl 0x505b6d
mov edi, str.RIFF
or ecx, 0xffffffff
xor eax, eax
mov esi, dword [esp + 0x1c]
repne scasb al, byte es:[edi]
not ecx
dec ecx
push ecx
push str.RIFF
push esi
call fcn.00575db0
add esp, 0xc
test eax, eax
jne 0x505b6d
mov eax, dword [esi + 4]
mov edi, 0x1a3a404
mov dword [esp + 0x14], eax
or ecx, 0xffffffff
xor eax, eax
add esi, 8
repne scasb al, byte es:[edi]
not ecx
dec ecx
push ecx
push 0x1a3a404
push esi
call fcn.00575db0
add esp, 0xc
test eax, eax
jne 0x505b6d
mov ecx, dword [esp + 0x1c]
xor ebx, ebx
xor esi, esi
xor ebp, ebp
lea edi, [ecx + 0xc]
mov dword [esp + 0x10], edi
mov edx, dword [edi + 4]
push 4
push str.fmt
push edi
mov dword [esp + 0x28], edx
call fcn.00575db0
add esp, 0xc
test eax, eax
jne 0x505af3
test esi, esi
lea ebx, [edi + 8]
jne 0x505b2a
jmp 0x505b12
push 4
push 0x1a3a3f4
push edi
call fcn.00575db0
add esp, 0xc
test eax, eax
jne 0x505b12
mov ebp, dword [esp + 0x1c]
lea esi, [edi + 8]
test ebx, ebx
jne 0x505b2e
mov eax, dword [esp + 0x1c]
mov edx, dword [esp + 0x10]
lea edi, [edi + eax + 8]
mov eax, dword [esp + 0x14]
mov ecx, edi
sub ecx, edx
cmp ecx, eax
jb 0x505acf
test ebx, ebx
je 0x505b6d
test esi, esi
je 0x505b6d
test ebp, ebp
jbe 0x505b6d
push 0x4c
call fcn.005ecab3
mov dword [esp + 0x24], eax
mov dword [eax + 8], ebp
mov edx, dword [esp + 0x24]
mov eax, dword [edx + 8]
push eax
call fcn.005774b7
mov ecx, dword [esp + 0x28]
add esp, 8
mov dword [ecx], eax
mov eax, dword [esp + 0x20]
mov edi, dword [eax]
test edi, edi
jne 0x505b77
push eax
call fcn.005ecadc
add esp, 4
pop edi
pop esi
pop ebp
xor eax, eax
pop ebx
add esp, 8
ret
mov ecx, ebp
push 0x14
mov edx, ecx
push 0x3c00
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, edx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov eax, dword [esp + 0x28]
mov ecx, dword [esp + 0x2c]
mov dword [eax + 0x48], ecx
mov edx, dword [esp + 0x28]
mov dword [edx + 0x1c], 0
call fcn.00505840
mov ecx, dword [esp + 0x28]
add esp, 8
push 0
push 0
push 1
push 0
mov dword [ecx + 0xc], eax
call dword [sym.imp.KERNEL32.dll_CreateEventA]
mov edx, dword [esp + 0x20]
push 0
push 0x14
push 0x14
push 0
mov dword [edx + 0x2c], eax
call dword [sym.imp.KERNEL32.dll_CreateSemaphoreA]
mov ecx, dword [esp + 0x20]
mov dword [ecx + 0x28], eax
mov edx, dword [esp + 0x20]
mov dword [edx + 0x14], 0
mov eax, dword [esp + 0x20]
mov dword [eax + 0x10], 0x14
mov ecx, dword [esp + 0x20]
add ecx, 0x30
push ecx
call dword [sym.imp.KERNEL32.dll_InitializeCriticalSection]
mov eax, dword [esp + 0x20]
push 0x506080
push eax
add eax, 4
push ebx
push eax
call fcn.005058b0
mov eax, dword [esp + 0x30]
add esp, 0x10
mov edi, 4
lea edx, [eax + 0x24]
push edx
push edi
push eax
push 0x505e30
push 0
push 0
call dword [sym.imp.KERNEL32.dll_CreateThread]
mov ecx, dword [esp + 0x20]
push 0x1b195f8
mov dword [ecx + 0x20], eax
call dword [sym.imp.KERNEL32.dll_EnterCriticalSection]
mov eax, dword [0x1b19618]
mov edx, dword [0x1b1961c]
sub edx, eax
mov esi, eax
sar edx, 2
cmp edx, 1
jae 0x505d53
mov edx, dword [0x1b19614]
test edx, edx
je 0x505c82
mov ecx, eax
sub ecx, edx
sar ecx, 2
cmp ecx, 1
jbe 0x505c82
mov ecx, eax
sub ecx, edx
sar ecx, 2
jmp 0x505c87
mov ecx, 1
test edx, edx
jne 0x505c8f
xor eax, eax
jmp 0x505c94
sub eax, edx
sar eax, 2
add eax, ecx
test eax, eax
mov dword [esp + 0x1c], eax
jge 0x505ca0
xor eax, eax
lea edx, [eax*4]
push edx
call fcn.005ecab3
mov edi, dword [0x1b19614]
add esp, 4
mov ebp, eax
cmp edi, esi
mov ebx, ebp
je 0x505cd2
push edi
push ebx
call fcn.00506180
add edi, 4
add esp, 8
add ebx, 4
cmp edi, esi
jne 0x505cbe
lea eax, [esp + 0x20]
push eax
push ebx
call fcn.00506180
mov edi, dword [0x1b19618]
add esp, 8
add ebx, 4
cmp esi, edi
je 0x505d01
push esi
push ebx
call fcn.00506180
add esi, 4
add esp, 8
add ebx, 4
cmp esi, edi
jne 0x505ced
mov ecx, dword [0x1b19618]
mov edx, dword [0x1b19614]
push ecx
push edx
mov ecx, 0x1b19610
call fcn.00506110
mov eax, dword [0x1b19614]
push eax
call fcn.005ecadc
mov ecx, dword [esp + 0x20]
add esp, 4
lea edx, [ebp + ecx*4]
mov ecx, 0x1b19610
mov dword [0x1b1961c], edx
call fcn.005060c0
lea eax, [ebp + eax*4 + 4]
mov dword [0x1b19614], ebp
mov dword [0x1b19618], eax
jmp 0x505df0
mov ecx, eax
sub ecx, esi
sar ecx, 2
cmp ecx, 1
jae 0x505dad
lea edx, [esi + 4]
mov ecx, 0x1b19610
push edx
push eax
push esi
call fcn.00506120
lea eax, [esp + 0x20]
mov edx, 1
push eax
mov eax, dword [0x1b19618]
mov ecx, eax
sub ecx, esi
sar ecx, 2
sub edx, ecx
mov ecx, 0x1b19610
push edx
push eax
call fcn.00506150
mov ecx, dword [0x1b19618]
mov eax, esi
cmp esi, ecx
je 0x505dea
mov edx, dword [esp + 0x20]
mov dword [eax], edx
add eax, edi
cmp eax, ecx
jne 0x505d9f
jmp 0x505dea
push eax
push eax
add eax, 0xfffffffc
mov ecx, 0x1b19610
push eax
call fcn.00506120
mov eax, dword [0x1b19618]
mov ecx, eax
add eax, 0xfffffffc
cmp esi, eax
je 0x505dd7
sub eax, edi
sub ecx, edi
cmp eax, esi
mov edx, dword [eax]
mov dword [ecx], edx
jne 0x505dcb
lea eax, [esi + 4]
cmp esi, eax
je 0x505dea
mov ecx, dword [esp + 0x20]
mov dword [esi], ecx
add esi, edi
cmp esi, eax
jne 0x505dde
add dword [0x1b19618], edi
push 0x1b195f8
call dword [sym.imp.KERNEL32.dll_LeaveCriticalSection]
mov edx, dword [esp + 0x20]
mov eax, dword [edx + 0x20]
push eax
call dword [sym.imp.KERNEL32.dll_ResumeThread]
mov ecx, dword [esp + 0x20]
push 0
push 0x14
mov edx, dword [ecx + 0x28]
push edx
call dword [sym.imp.KERNEL32.dll_ReleaseSemaphore]
pop edi
pop esi
pop ebp
mov eax, 1
pop ebx
add esp, 8
ret