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<CsoundSynthesizer>
<CsInstruments>
lua_opdef "luatest", {{
local ffi = require("ffi")
local string = require("string")
local csoundLibrary = ffi.load('csound64.dll.5.2')
ffi.cdef[[
int csoundGetKsmps(void *);
double csoundGetSr(void *);
struct luatest_arguments {double *out; double *stringout; char *stringin; double *in1; double *in2; double sr; int ksmps; };
]]
function luatest_init(csound, opcode, carguments)
local arguments = ffi.cast("struct luatest_arguments *", carguments)
arguments.sr = csoundLibrary.csoundGetSr(csound)
print(string.format('stringin: %s', ffi.string(arguments.stringin)))
print(string.format('sr: %f', arguments.sr))
arguments.ksmps = csoundLibrary.csoundGetKsmps(csound)
print(string.format('ksmps: %d', arguments.ksmps))
arguments.out[0] = arguments.in1[0] * arguments.in2[0]
ffi.copy(arguments.stringout, 'Hello, world!')
return 0
end
function luatest_kontrol(csound, opcode, carguments)
local arguments = ffi.cast("struct luatest_arguments *", carguments)
arguments.out[0] = arguments.in1[0] * arguments.in2[0]
return 0
end
function luatest_noteoff(csound, opcode, carguments)
local arguments = ffi.cast("struct luatest_arguments *", carguments)
arguments.out[0] = arguments.in1[0] * arguments.in2[0]
print('off')
return 0
end
}}
instr 1
iresult = 0
Stringin = "stringin"
Stringout = "stringout"
lua_iopcall "luatest", iresult, Stringout, Stringin, p2, p3
prints Stringout
endin
instr 2
iresult = 0
Stringin = "stringin"
Stringout = "initial value"
lua_iopcall_off "luatest", iresult, Stringout, Stringin, p2, p3
print iresult
prints Stringout
endin
</CsInstruments>
<CsScore>
i 1 1 2
i 2 2 2
i 1 3 2
e
</CsScore>
</CsoundSynthesizer>
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