Em 04-07-2011 19:47, Laurent Pinchart escreveu: > Hi Mauro, > > On Monday 04 July 2011 18:09:18 Mauro Carvalho Chehab wrote: > > [snip] > >> 1) PRESET STANDARDS >> ====== ========= >> >> There are 3 specs involved with DV presets: ITU-R BT 709 and BT 1120 and >> CEA 861. >> >> At ITU-R BT.709, both 60Hz and 60/1.001 Hz are equally called as "60 Hz". >> BT.1120 follows the same logic, as it uses BT.709 as a reference for video >> timings. >> >> The CEA-861-E spec says at item 4, that: > > [snip] > >> At the same item, the table 2 describes several video parameters for each >> preset, associating the Video Identification Codes (VIC) for each preset. > > This might be a bit out of scope, but why aren't we using the VICs as DV > presets ? I had the same question after analyzing the specs ;) That's said, abstracting from the spec could be a good idea if we have newer versions of the spec re-defining the VICs. Maybe the right thing to do would be to rename the presets as: V4L2_DV_CEA861_VIC_16 V4L2_DV_CEA861_VIC_35_36 ... (or course, preserving the old names with compatibility macros) Cheers, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
