• Hans de Goede's avatar
    [media] gspca: Add a need_max_bandwidth flag to sd_desc · eb3fb7c9
    Hans de Goede authored
    Some cameras will pretty much entirely fill all the image buffers all the
    time even though they are using compression.
    
    This patch adds a flag to sd_desc, which drivers for such cameras can set.
    
    When this flag is set the bandwidth calculation code will no longer
    assume that the image buffer size is a worst case and less bandwidth than
    imagebufsize * fps will be used on average.
    
    This patch sets this new flag for 3 drivers:
    * For spca561 (for rev12a cameras) and nw80x cams as these simply don't work
      when given less bandwidth than imagebufsize * fps.
    * For sn9c20x cameras, because these show severy jpeg artifacts when
      given less bandwidth than imagebufsize * fps and since these are usb2
      cameras there is plenty bandwidth anyways.
    Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
    Signed-off-by: default avatarJean-François Moine <moinejf@free.fr>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
    eb3fb7c9
nw80x.c 75.9 KB