Dafna Hirschfeld b38c73ca1c media: v4l2: add support for colorspace conversion API (CSC) for video capture ... For video capture it is the driver that reports the colorspace, transfer function, Y'CbCr/HSV encoding and quantization range used by the video, and there is no way to request something different, even though many HDTV receivers have some sort of colorspace conversion capabilities. For output video this feature already exists since the application specifies this information for the video format it will send out, and the transmitter will enable any available CSC if a format conversion has to be performed in order to match the capabilities of the sink. For video capture we propose adding new v4l2_pix_format flag: V4L2_PIX_FMT_FLAG_SET_CSC. The flag is set by the application, the driver will interpret the colorspace, xfer_func, ycbcr_enc/hsv_enc and quantization fields as the requested colorspace information and will attempt to do the conversion it supports. Drivers set the flags V4L2_FMT_FLAG_CSC_COLORSPACE, V4L2_FMT_FLAG_CSC_XFER_FUNC, V4L2_FMT_FLAG_CSC_YCBCR_ENC/V4L2_FMT_FLAG_CSC_HSV_ENC, V4L2_FMT_FLAG_CSC_QUANTIZATION, in the flags field of the struct v4l2_fmtdesc during enumeration to indicate that they support colorspace conversion for the respective field. Drivers do not have to actually look at the flags. If the flags are not set, then the fields 'colorspace', 'xfer_func', 'ycbcr_enc/hsv_enc', and 'quantization' are set to the default values by the core, i.e. just pass on the received format without conversion. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>		2020-09-26 10:20:57 +02:00
..
cec	media: docs: use the new SPDX header for GFDL-1.1 on *.rst files	2020-09-01 14:13:30 +02:00
drivers	media: docs: add an uAPI chapter for driver-specific stuff	2020-04-14 10:36:50 +02:00
dvb	media: docs: use SPDX GPL-2.0 OR GFDL-1.1 instead of text on *.svg files	2020-09-01 14:13:30 +02:00
mediactl	media: docs: use SPDX GPL-2.0 OR GFDL-1.1 instead of text on *.rst files	2020-09-01 14:13:30 +02:00
rc	media: docs: use the new SPDX header for GFDL-1.1 on *.rst files	2020-09-01 14:13:30 +02:00
v4l	media: v4l2: add support for colorspace conversion API (CSC) for video capture	2020-09-26 10:20:57 +02:00
audio.h.rst.exceptions
ca.h.rst.exceptions
cec.h.rst.exceptions
conf_nitpick.py	Documentation: media: convert to use i2c_new_client_device()	2020-06-19 09:20:25 +02:00
dmx.h.rst.exceptions
fdl-appendix.rst	media: docs: use the new SPDX header for GFDL-1.1 on *.rst files	2020-09-01 14:13:30 +02:00
frontend.h.rst.exceptions
gen-errors.rst	media: docs: use the new SPDX header for GFDL-1.1 on *.rst files	2020-09-01 14:13:30 +02:00
glossary.rst	media: docs: add glossary.rst with common terms used at V4L2 spec	2020-09-01 14:13:30 +02:00
index.rst	media: docs: add glossary.rst with common terms used at V4L2 spec	2020-09-01 14:13:30 +02:00
intro.rst
lirc.h.rst.exceptions
Makefile
media.h.rst.exceptions
net.h.rst.exceptions
typical_media_device.svg	media: docs: use the new SPDX header for GFDL-1.1 on *.svg files	2020-09-01 14:13:30 +02:00
video.h.rst.exceptions
videodev2.h.rst.exceptions	media: v4l2: add support for colorspace conversion API (CSC) for video capture	2020-09-26 10:20:57 +02:00