yv12 constant

Android YUV format.

This format is exposed to software decoders and applications.

YV12 is a 4:2:0 YCrCb planar format comprised of a WxH Y plane followed by (W/2) x (H/2) Cr and Cb planes.

This format assumes:

an even width
an even height
a horizontal stride multiple of 16 pixels
a vertical stride equal to the height

 y_size = stride * height
 c_stride = ALIGN(stride/2, 16)
 c_size = c_stride * height/2
 size = y_size + c_size * 2
 cr_offset = y_size
 cb_offset = y_size + c_size
``

This format is guaranteed to be supported for Camera preview images; for
earlier API versions.

Note that for camera preview callback use (see
[Camera.setPreviewCallback]), the stride value is the smallest possible;
that is, it is equal to:

`stride = ALIGN(width, 16)`

See:
  https://developer.android.com/reference/android/graphics/ImageFormat#YV12

Implementation

ImageFormat class