Hi Hans, On Monday, 1 October 2018 11:43:04 EEST Hans Verkuil wrote: > It turns out that we have both JPEG and Motion-JPEG pixel formats defined. > > Furthermore, some drivers support one, some the other and some both. > > These pixelformats both mean the same. Do they ? I thought MJPEG was JPEG using fixed Huffman tables that were not included in the JPEG headers. > I propose that we settle on JPEG (since it seems to be used most often) and > add JPEG support to those drivers that currently only use MJPEG. > > We also need to update the V4L2_PIX_FMT_JPEG documentation since it just > says TBD: > > https://www.linuxtv.org/downloads/v4l-dvb-apis-new/uapi/v4l/pixfmt-compresse > d.html > > $ git grep -l V4L2_PIX_FMT_MJPEG > drivers/media/pci/meye/meye.c > drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c > drivers/media/platform/sti/delta/delta-cfg.h > drivers/media/platform/sti/delta/delta-mjpeg-dec.c > drivers/media/usb/cpia2/cpia2_v4l.c > drivers/media/usb/go7007/go7007-driver.c > drivers/media/usb/go7007/go7007-fw.c > drivers/media/usb/go7007/go7007-v4l2.c > drivers/media/usb/s2255/s2255drv.c > drivers/media/usb/uvc/uvc_driver.c > drivers/staging/media/zoran/zoran_driver.c > drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c > drivers/usb/gadget/function/uvc_v4l2.c > > It looks like s2255 and cpia2 support both already, so that would leave > 8 drivers that need to be modified, uvc being the most important of the > lot. > > Any comments? -- Regards, Laurent Pinchart
