1 files changed, 61 insertions, 0 deletions
diff --git a/examples/luaopcode.csd b/examples/luaopcode.csd
new file mode 100644
index 0000000..1a3612a
--- /dev/null
+++ b/examples/luaopcode.csd
@@ -0,0 +1,61 @@
+<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>