CODEWITHSUNDEEP
c#pointerspinvoke
mnn
mnn

Reputation:

Retrieve data from const int * const buffer[]

I marshalled correctly to:

IntPtr buffer

Buffer is pointer to array of 2 pointers to arrays with respective data. The problem is that I get not accurate data, like if there's something missing in the data retrieved (e.g. missimg samples from stream of audio data).

// length is parameter
IntPtr[] temp = new IntPtr[2];
Marshal.Copy(buffer, temp, 0, 2);
bufferedData = new byte[bufferSize];
byte[] a = new byte[length];
byte[] b = new byte[length];
Marshal.Copy(temp[0], a, 0, length);
Marshal.Copy(temp[1], b, 0, length);

edit: sorry I forgot to write those 2 lines :)

Upvotes: 1

Views: 337

Answers (4)

mnn
mnn

Reputation:

I finally solved it. I wasn't reading full input buffer by mistake. Thanks for all your help!

Upvotes: 1

Zebra North
Zebra North

Reputation: 11492

I don't know anything about C# so this is a complete guess, but - you seem to be copying from ints to bytes, is "length" the count in ints, or the count in bytes? Could there be a mixup there? This can be a problem in regular old C++ sometimes.

Upvotes: 0

leppie
leppie

Reputation: 117290

If buffer is a pointer to an array, you would need to read the pointer once more.

Effectively:

buffer = Marshal.ReadIntPtr(buffer);

Upvotes: 0

leppie
leppie

Reputation: 117290

Yes, you would need to copy the byte buffers too :)

Update: That looks better!

Upvotes: 0

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