On Saturday 07 January 2012 02:55:08 vkalia@xxxxxxxxxxxxxx wrote: > Thanks Hans. > > Yes it does solve a part of my problem - Pause/Resume. But I dont see any > command defined for Flush yet. Do you think we should add one more command > to Flush. What exactly does flush do? Is it the equivalent of an immediate stop? > Also, I see two more commands > > #define V4L2_DEC_CMD_START (0) > #define V4L2_DEC_CMD_STOP (1) > > How should I use the above two commands for an encoding/decoding session? > I was calling start/stop to hardware in streamon/streamoff earlier. See the documentation of these commands in patch 2/8: a write() or streamon does an implicit decoder start, and close/streamoff() does an implicit immediate stop. For hardware codecs that handle a compressed stream (as opposed to separate compressed frames) it is often very useful to implement the read/write API. That tends to be a natural API to use. E.g. you can just do: cat test.mpg >/dev/videoX Regards, Hans > > Thanks > Vinay > > > On Friday, January 06, 2012 03:31:37 vkalia@xxxxxxxxxxxxxx wrote: > >> Hi > >> > >> I am trying to implement v4l2 driver for video decoders. The problem I > >> am > >> facing is how to send pause/resume and flush commands from user-space to > >> v4l2 driver. I am thinking of using controls for this. Has anyone done > >> this before or if anyone has any ideas please let me know. Appreciate > >> your > >> help. > > > > See this patch series: > > > > http://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg40516.html > > > > Does this give you what you need? > > > > Regards, > > > > Hans > > > >> Thanks > >> Vinay > >> > >> -- > >> 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 > > > > -- > > 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 -- 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
