[Libexif-devel] How does libexif works with libjpeg to insert exif data in jpeg file?

[n179911 <n1...@gm...>]

How does libexif works with libjpeg to insert exif data in jpeg file?

I think libjpeg creates JPEG header and JPEG image data.
I think EXIF data is after JPEG header and before JPEG image data.

To create a jpeg image with EXIF header, do I need to

0. allocate a new buffer big enough for JPEG header + EXIF header +
JPEG image data
1. memcpy the JPEG header created by libjpeg
2. memcpy the EXIF header created by libexif
3. memcpy the JPEG image date created by libjpeg

Thank you.