About the method of converting astiav.Frame to Image

[Tryanks]

pre-reading #4 #5 #22
A no matter the cost method is to use astiav.Encoder to encode astiav.Frame to PNG and read it as Image.Image.
Is there a better proposal that doesn't require untangling numerous pixel formats?

[asticode]

Honestly, now I'd like this part to be part of this lib. The way I see it is:

• create a FrameData struct:

type FrameData struct {
    ...
}

func(d *FrameData) Bytes() [NumDataPointers][]byte {}

func(d *FrameData) Image() (image.Image, error) {}

func(d *FrameData) Sample() ("whatever go representation is best suited", error) {}

• Frame.Data() now returns a *FrameData instead of [NumDataPointers][]byte directly
• FrameData.Image() will check the frame is an image, check whether pixel format is handled and either return *image.RGBA, *image.YCbCr, *image.YCbCrA, ... depending on the pixel format

Does that sound even remotely sound?

If so, I'll have some time this weekend to try it out 👍

[asticode]

FYI Frame.Data() now returns a *FrameData that allows to either get data as []byte or, if it's an image, get data as an image.Image 👍

[Tryanks]

Great job! I can't believe you actually did it. I tried converting directly based on bytes once, but I gave up after a couple months long learning curve.