Deinterlacing and Upsampling in PC playback

[Movie_Maker]

When you play a video (or dvd) on a PC, where exactly in the whole flow of data, from the file to the screen, does de-interlacing and chroma upsampling happen during the playback ? Is it in the codec ? or in the Video card ? or in the player software ?

Now I know there are many good and not-so-good ways of doing deinterlacing and chroma upsampling. So a followup question to the above is then what is the a good (codec/card/player - depending on the answer to the question above) that does the deinterlacing and upsampling in the best (or very good) possible manner ?

[Atak_Snajpera]

Player -> MPC-HC
Upsampling -> MPC-HC + shader yv12 chroma upsampling
Deinterlacer -> FFDShow Yadif

[Movie_Maker]

ok thanks I will check those out. I was going to download and play around with MPC-HC after I saw the 'quality tests' thread in the Software section.

So I take it that either the player, codec or hardware(graphics card) can do deinterlacing and upsampling. And if the player does not do it, the codec will and if the codec does not do it then the hardware will. Am I understanding this correctly ?