在dart:ffi中将Uint8List传递给Pointer<Void>

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在dart:ffi中将Uint8List传递给Pointer<Void>

bool sendFrame(int width, int height, int channelNumber, void *data, bool clone);

  final int Function(int, int, int, Pointer<Void>, int) rPPGSendFrame = rPPGLib
      .lookup<
          NativeFunction<
              Int32 Function(
                  Int32, Int32, Int32, Pointer<Void>, Int32)>>("sendFrame")
      .asFunction();

import "dart:ffi" as ffi;
// 'data' is a Uint8List created by concatenating the planes received from the CameraImage the camera puts out.
// Based on the code found here https://github.com/renancaraujo/bitmap/blob/master/lib/ffi.dart in the execute function
// https://groups.google.com/forum/#!searchin/dart-ffi/list%7Csort:date/dart-ffi/V_6g5hpABec/U9we6UyvBAAJ
  final ffi.Pointer<ffi.Uint8> frameData = allocate<ffi.Uint8>(count: data.length); // Allocate a pointer large enough.
  final pointerList = frameData.asTypedList(data.length); // Create a list that uses our pointer and copy in the image data.
  pointerList.setAll(0, data);

final int Function(ffi.Pointer<ffi.Uint8>, int, int, int) cppFunc = dynamicLibrary
    .lookup<ffi.NativeFunction<ffi.Int32 Function(ffi.Pointer<ffi.Uint8>, ffi.Int32, ffi.Int32, ffi.Int32)>>("cppFunc")

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在dart:ffi中将Uint8List传递给Pointer<Void>

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