YUV & RGB Transformations

[amatiman]

Hi to all,

I am a very new person in the world of Audio & Video Enoding / Decoding.
The current assignment that I have been given is to develop an engine (in C) that would transform various RAW RGB & RAW YUV files from one form to other, i.e. RGB to YUV & vice-versa. ( RGB888 & below and YUV444 & below )

Being a very new professional in the field of Digital Media, I am really stuck up with certain documents that I managed from the net. I read information as to how to use mathematical formulas to transform these files.

The biggest problem Im facing right now is How to identify the format of these YUV & RGB files.What is the format of the Structure that defines its definition.

I hope you would be kind enough to spare some of your time to help me start up with some proper solution to this problem right from the grass root level. (I have just 2 more days to document my work and define the plan that I shall adapt).

Just give me some idea about the Structure that I can use to Decode these files in my programs, coz once I know the Structure, its just the matter of Parsing which is a relatively very easy task.

It wold be great if you can show me a code segment ( preferably in "C" ) that reads & writes RGB & YUV files

Kindly Help me build up my career in a significant manner.

Desperately looking forward to a quick reply from you....

Thanks & Regards

A Matiman

[Wilbert]

Have a look at RawSource (AviSynth plugin) for reading raw RGB & YUV files. Have a look at http://www.avisynth.org/ColorConversions for the RBG <-> YUV conversions. Of course you have to convert it to int based calculations to speed it up.

Btw, I assume YUV444 is planar with full chroma resolution?

[amatiman]

Thanks Wilbert, but it would be more helpful if you can give me the details of the Structure of YUV and RGB files....

[amatiman]

Here is a more precise information about the type of work I want to perform, Take the YUV/RGB file (no information of any sort available inside the file) input with the details mentioned seperately on the basis of the various options available and transform it into any of the desired YUV/RGB format with the maximum possible portability options as possible (444, 422, 421, 420, YUYV or YUY2, YUV12 ...)

Regards

A Matiman