Message ID | 1478706284-59134-4-git-send-email-ramesh.shanmugasundaram@bp.renesas.com (mailing list archive) |
---|---|
State | Superseded, archived |
Delegated to: | Hans Verkuil |
Headers |
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Commit Message
Ramesh Shanmugasundaram
Nov. 9, 2016, 3:44 p.m. UTC
This patch adds support for the three new SDR formats. These formats
were prefixed with "sliced" indicating I data constitutes the top half and
Q data constitutes the bottom half of the received buffer.
V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian sample
inside 16-bit. V4L2 FourCC: SC16
V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian sample
inside 18-bit. V4L2 FourCC: SC18
V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian sample
inside 20-bit. V4L2 FourCC: SC20
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
---
drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++
include/uapi/linux/videodev2.h | 3 +++
2 files changed, 6 insertions(+)
Comments
On 11/09/2016 04:44 PM, Ramesh Shanmugasundaram wrote: > This patch adds support for the three new SDR formats. These formats > were prefixed with "sliced" indicating I data constitutes the top half and > Q data constitutes the bottom half of the received buffer. The standard terminology for video formats is "planar". I am leaning towards using that here as well. Any opinions on this? Hans > > V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian sample > inside 16-bit. V4L2 FourCC: SC16 > > V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian sample > inside 18-bit. V4L2 FourCC: SC18 > > V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian sample > inside 20-bit. V4L2 FourCC: SC20 > > Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> > --- > drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++ > include/uapi/linux/videodev2.h | 3 +++ > 2 files changed, 6 insertions(+) > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c > index 181381d..d36b386 100644 > --- a/drivers/media/v4l2-core/v4l2-ioctl.c > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c > @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) > case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; > case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; > case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; > + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; > + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; > + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; > case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; > case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; > case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; > diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h > index 4364ce6..34a9c30 100644 > --- a/include/uapi/linux/videodev2.h > +++ b/include/uapi/linux/videodev2.h > @@ -666,6 +666,9 @@ struct v4l2_pix_format { > #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* complex s8 */ > #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', '1', '4') /* complex s14le */ > #define V4L2_SDR_FMT_RU12LE v4l2_fourcc('R', 'U', '1', '2') /* real u12le */ > +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* sliced complex u16be */ > +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', '1', '8') /* sliced complex u18be */ > +#define V4L2_SDR_FMT_SCU20BE v4l2_fourcc('S', 'C', '2', '0') /* sliced complex u20be */ > > /* Touch formats - used for Touch devices */ > #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16-bit signed deltas */ > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Hans, On Friday 11 Nov 2016 14:24:41 Hans Verkuil wrote: > On 11/09/2016 04:44 PM, Ramesh Shanmugasundaram wrote: > > This patch adds support for the three new SDR formats. These formats > > were prefixed with "sliced" indicating I data constitutes the top half and > > Q data constitutes the bottom half of the received buffer. > > The standard terminology for video formats is "planar". I am leaning towards > using that here as well. > > Any opinions on this? I like that as well, but I'm obviously biased :-) > > V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian sample > > inside 16-bit. V4L2 FourCC: SC16 > > > > V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian sample > > inside 18-bit. V4L2 FourCC: SC18 > > > > V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian sample > > inside 20-bit. V4L2 FourCC: SC20 > > > > Signed-off-by: Ramesh Shanmugasundaram > > <ramesh.shanmugasundaram@bp.renesas.com> --- > > > > drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++ > > include/uapi/linux/videodev2.h | 3 +++ > > 2 files changed, 6 insertions(+) > > > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c > > b/drivers/media/v4l2-core/v4l2-ioctl.c index 181381d..d36b386 100644 > > --- a/drivers/media/v4l2-core/v4l2-ioctl.c > > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c > > @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc > > *fmt)> > > case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; > > case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; > > case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; > > > > + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; > > + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; > > + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; > > > > case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; > > case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; > > case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; > > > > diff --git a/include/uapi/linux/videodev2.h > > b/include/uapi/linux/videodev2.h index 4364ce6..34a9c30 100644 > > --- a/include/uapi/linux/videodev2.h > > +++ b/include/uapi/linux/videodev2.h > > @@ -666,6 +666,9 @@ struct v4l2_pix_format { > > > > #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* > > complex s8 */ #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', > > '1', '4') /* complex s14le */ #define V4L2_SDR_FMT_RU12LE > > v4l2_fourcc('R', 'U', '1', '2') /* real u12le */> > > +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* sliced > > complex u16be */ +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', > > '1', '8') /* sliced complex u18be */ +#define V4L2_SDR_FMT_SCU20BE > > v4l2_fourcc('S', 'C', '2', '0') /* sliced complex u20be */> > > /* Touch formats - used for Touch devices */ > > #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16- bit > > signed deltas */
Hi Hans, On Friday 11 Nov 2016 14:24:41 Hans Verkuil wrote: > On 11/09/2016 04:44 PM, Ramesh Shanmugasundaram wrote: > > This patch adds support for the three new SDR formats. These formats > > were prefixed with "sliced" indicating I data constitutes the top half and > > Q data constitutes the bottom half of the received buffer. > > The standard terminology for video formats is "planar". I am leaning towards > using that here as well. Another important question is whether we should introduce an SDR planar API. That's what we would like your opinion on. > > V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian sample > > inside 16-bit. V4L2 FourCC: SC16 > > > > V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian sample > > inside 18-bit. V4L2 FourCC: SC18 > > > > V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian sample > > inside 20-bit. V4L2 FourCC: SC20 > > > > Signed-off-by: Ramesh Shanmugasundaram > > <ramesh.shanmugasundaram@bp.renesas.com> --- > > > > drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++ > > include/uapi/linux/videodev2.h | 3 +++ > > 2 files changed, 6 insertions(+) > > > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c > > b/drivers/media/v4l2-core/v4l2-ioctl.c index 181381d..d36b386 100644 > > --- a/drivers/media/v4l2-core/v4l2-ioctl.c > > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c > > @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc > > *fmt)> > > case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; > > case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; > > case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; > > > > + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; > > + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; > > + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; > > > > case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; > > case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; > > case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; > > > > diff --git a/include/uapi/linux/videodev2.h > > b/include/uapi/linux/videodev2.h index 4364ce6..34a9c30 100644 > > --- a/include/uapi/linux/videodev2.h > > +++ b/include/uapi/linux/videodev2.h > > @@ -666,6 +666,9 @@ struct v4l2_pix_format { > > > > #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* > > complex s8 */ #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', > > '1', '4') /* complex s14le */ #define V4L2_SDR_FMT_RU12LE > > v4l2_fourcc('R', 'U', '1', '2') /* real u12le */> > > +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* sliced > > complex u16be */ +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', > > '1', '8') /* sliced complex u18be */ +#define V4L2_SDR_FMT_SCU20BE > > v4l2_fourcc('S', 'C', '2', '0') /* sliced complex u20be */> > > /* Touch formats - used for Touch devices */ > > #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16- bit > > signed deltas */
Hi Hans, Thanks for the review comments. > Subject: Re: [PATCH 3/5] media: Add new SDR formats SC16, SC18 & SC20 > > On 11/09/2016 04:44 PM, Ramesh Shanmugasundaram wrote: > > This patch adds support for the three new SDR formats. These formats > > were prefixed with "sliced" indicating I data constitutes the top half > > and Q data constitutes the bottom half of the received buffer. > > The standard terminology for video formats is "planar". I am leaning > towards using that here as well. > > Any opinions on this? Shall I rename the formats as "PC16", "PC18" & "PC20"? For formats that do IQ IQ IQ... I shall use the regular formats "CUXX" when I introduce them. Thanks, Ramesh > > Hans > > > > > V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian > > sample inside 16-bit. V4L2 FourCC: SC16 > > > > V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian > > sample inside 18-bit. V4L2 FourCC: SC18 > > > > V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian > > sample inside 20-bit. V4L2 FourCC: SC20 > > > > Signed-off-by: Ramesh Shanmugasundaram > > <ramesh.shanmugasundaram@bp.renesas.com> > > --- > > drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++ > > include/uapi/linux/videodev2.h | 3 +++ > > 2 files changed, 6 insertions(+) > > > > diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c > > b/drivers/media/v4l2-core/v4l2-ioctl.c > > index 181381d..d36b386 100644 > > --- a/drivers/media/v4l2-core/v4l2-ioctl.c > > +++ b/drivers/media/v4l2-core/v4l2-ioctl.c > > @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc > *fmt) > > case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; > > case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; > > case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; > > + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; > > + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; > > + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; > > case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; > > case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; > > case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; > break; > > diff --git a/include/uapi/linux/videodev2.h > > b/include/uapi/linux/videodev2.h index 4364ce6..34a9c30 100644 > > --- a/include/uapi/linux/videodev2.h > > +++ b/include/uapi/linux/videodev2.h > > @@ -666,6 +666,9 @@ struct v4l2_pix_format { > > #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* > complex s8 */ > > #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', '1', '4') /* > complex s14le */ > > #define V4L2_SDR_FMT_RU12LE v4l2_fourcc('R', 'U', '1', '2') /* > real u12le */ > > +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* > sliced complex u16be */ > > +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', '1', '8') /* > sliced complex u18be */ > > +#define V4L2_SDR_FMT_SCU20BE v4l2_fourcc('S', 'C', '2', '0') /* > sliced complex u20be */ > > > > /* Touch formats - used for Touch devices */ > > #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16- > bit signed deltas */ > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 11/14/2016 05:20 PM, Ramesh Shanmugasundaram wrote: > Hi Hans, > > Thanks for the review comments. > >> Subject: Re: [PATCH 3/5] media: Add new SDR formats SC16, SC18 & SC20 >> >> On 11/09/2016 04:44 PM, Ramesh Shanmugasundaram wrote: >>> This patch adds support for the three new SDR formats. These formats >>> were prefixed with "sliced" indicating I data constitutes the top half >>> and Q data constitutes the bottom half of the received buffer. >> >> The standard terminology for video formats is "planar". I am leaning >> towards using that here as well. >> >> Any opinions on this? > > Shall I rename the formats as "PC16", "PC18" & "PC20"? Sounds reasonable to me! Hans > For formats that do IQ IQ IQ... I shall use the regular formats "CUXX" when I introduce them. > > Thanks, > Ramesh > >> >> Hans >> >>> >>> V4L2_SDR_FMT_SCU16BE - 14-bit complex (I & Q) unsigned big-endian >>> sample inside 16-bit. V4L2 FourCC: SC16 >>> >>> V4L2_SDR_FMT_SCU18BE - 16-bit complex (I & Q) unsigned big-endian >>> sample inside 18-bit. V4L2 FourCC: SC18 >>> >>> V4L2_SDR_FMT_SCU20BE - 18-bit complex (I & Q) unsigned big-endian >>> sample inside 20-bit. V4L2 FourCC: SC20 >>> >>> Signed-off-by: Ramesh Shanmugasundaram >>> <ramesh.shanmugasundaram@bp.renesas.com> >>> --- >>> drivers/media/v4l2-core/v4l2-ioctl.c | 3 +++ >>> include/uapi/linux/videodev2.h | 3 +++ >>> 2 files changed, 6 insertions(+) >>> >>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c >>> b/drivers/media/v4l2-core/v4l2-ioctl.c >>> index 181381d..d36b386 100644 >>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c >>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c >>> @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc >> *fmt) >>> case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; >>> case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; >>> case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; >>> + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; >>> + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; >>> + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; >>> case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; >>> case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; >>> case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; >> break; >>> diff --git a/include/uapi/linux/videodev2.h >>> b/include/uapi/linux/videodev2.h index 4364ce6..34a9c30 100644 >>> --- a/include/uapi/linux/videodev2.h >>> +++ b/include/uapi/linux/videodev2.h >>> @@ -666,6 +666,9 @@ struct v4l2_pix_format { >>> #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* >> complex s8 */ >>> #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', '1', '4') /* >> complex s14le */ >>> #define V4L2_SDR_FMT_RU12LE v4l2_fourcc('R', 'U', '1', '2') /* >> real u12le */ >>> +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* >> sliced complex u16be */ >>> +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', '1', '8') /* >> sliced complex u18be */ >>> +#define V4L2_SDR_FMT_SCU20BE v4l2_fourcc('S', 'C', '2', '0') /* >> sliced complex u20be */ >>> >>> /* Touch formats - used for Touch devices */ >>> #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16- >> bit signed deltas */ >>> > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@vger.kernel.org > 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 181381d..d36b386 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1207,6 +1207,9 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; + case V4L2_SDR_FMT_SCU16BE: descr = "Sliced Complex U16BE"; break; + case V4L2_SDR_FMT_SCU18BE: descr = "Sliced Complex U18BE"; break; + case V4L2_SDR_FMT_SCU20BE: descr = "Sliced Complex U20BE"; break; case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 4364ce6..34a9c30 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -666,6 +666,9 @@ struct v4l2_pix_format { #define V4L2_SDR_FMT_CS8 v4l2_fourcc('C', 'S', '0', '8') /* complex s8 */ #define V4L2_SDR_FMT_CS14LE v4l2_fourcc('C', 'S', '1', '4') /* complex s14le */ #define V4L2_SDR_FMT_RU12LE v4l2_fourcc('R', 'U', '1', '2') /* real u12le */ +#define V4L2_SDR_FMT_SCU16BE v4l2_fourcc('S', 'C', '1', '6') /* sliced complex u16be */ +#define V4L2_SDR_FMT_SCU18BE v4l2_fourcc('S', 'C', '1', '8') /* sliced complex u18be */ +#define V4L2_SDR_FMT_SCU20BE v4l2_fourcc('S', 'C', '2', '0') /* sliced complex u20be */ /* Touch formats - used for Touch devices */ #define V4L2_TCH_FMT_DELTA_TD16 v4l2_fourcc('T', 'D', '1', '6') /* 16-bit signed deltas */