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6073 :: Issue with a function signature

• mantielero (orginal) [2020-03-15T20:31:27+01:00] view original

  I am having a problem with a function call:

  Error: type mismatch: got <proc (n: cint, activationReason: cint, instanceData: ptr pointer, frameData: ptr pointer, frameCtx: ptr VSFrameContext, core: ptr VSCore, vsapi: ptr VSAPI): ptr VSFrameRef{.locks: <unknown>.}> but expected 'VSFilterGetFrame = proc (n: cint, activationReason: cint, instanceData: ptr pointer, frameData: ptr pointer, frameCtx: ptr VSFrameContext, core: ptr VSCore, vsapi: ptr VSAPI): ptr VSFrameRef{.cdecl.}'

  Both types look the same to me. What am I missing?:

  got <proc (n: cint,
                        activationReason: cint,
                        instanceData: ptr pointer,
                        frameData: ptr pointer,
                        frameCtx: ptr VSFrameContext,
                        core: ptr VSCore,
                        vsapi: ptr VSAPI): ptr VSFrameRef{.locks: <unknown>.}>
  
  but expected 'VSFilterGetFrame = proc (
                        n: cint,
                        activationReason: cint,
                        instanceData: ptr pointer,
                        frameData: ptr pointer,
                        frameCtx: ptr VSFrameContext,
                        core: ptr VSCore,
                        vsapi: ptr VSAPI): ptr VSFrameRef{.cdecl.}'

  The line that is causing the error is:

  let tmp2:VSFilterGetFrame = cropGetframe
  Run

  where VSFilterGetFrame is defined as:

  type
       VSFilterGetFrame*  = proc(n: cint, activationReason: cint, instanceData: ptr pointer, frameData: ptr pointer, frameCtx: ptr VSFrameContext, core: ptr VSCore, vsapi: ptr VSAPI):ptr VSFrameRef {.cdecl.}
  Run

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• mantielero (orginal) [2020-03-15T22:01:20+01:00] view original

  I was missing the {.cdecl.} in the function declaration.

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