Problems when scaling a YUV image using libyuv library

Question

I\'m developing a camera app based on Camera API 2 and I have found several problems using the libyuv. I want to convert YUV_420_888 images retriev

Answer 1

You have an issue with the input size of the frame:

It should be:

int input_array_size = env->GetArrayLength(yuvByteArray_);
int input_size = input_array_size * 2 / 3; //This is the frame size

For example, If you have a Frame that is 6x4

Chanel y size: 6*4 = 24

 1 2 3 4 5 6
 _ _ _ _ _ _
|_|_|_|_|_|_| 1
|_|_|_|_|_|_| 2
|_|_|_|_|_|_| 3
|_|_|_|_|_|_| 4

Chanel u size: 3*2 = 6

  1   2   3 
 _ _ _ _ _ _
|   |   |   | 
|_ _|_ _|_ _| 1
|   |   |   | 
|_ _|_ _|_ _| 2

Chanel v size: 3*2 = 6

  1   2   3 
 _ _ _ _ _ _
|   |   |   | 
|_ _|_ _|_ _| 1
|   |   |   | 
|_ _|_ _|_ _| 2

Array Size = 6*4+3*2+3*2 = 36
But actual Frame Size = channel y Size = 36 * 2 / 3 = 24