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  1. 06 3月, 2014 1 次提交
    • A
      [media] v4l: add new tuner types for SDR · 84099a28
      由 Antti Palosaari 提交于 
      Define tuner types V4L2_TUNER_ADC and V4L2_TUNER_RF for SDR usage.

ADC is used for setting sampling rate (sampling frequency) to SDR
device.

Another tuner type, named as V4L2_TUNER_RF, is possible RF tuner.
Is is used to down-convert RF frequency to range ADC could sample.
Having RF tuner is optional, whilst in practice it is almost always
there.

Also add checks to VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY and
VIDIOC_ENUM_FREQ_BANDS only allow these two tuner types when device
type is SDR (VFL_TYPE_SDR). For VIDIOC_G_FREQUENCY we do not check
tuner type, instead override type with V4L2_TUNER_ADC in every
case (requested by Hans in order to keep functionality in line with
existing tuners and existing API does not specify it).

Prohibit VIDIOC_S_HW_FREQ_SEEK explicitly when device type is SDR,
as device cannot do hardware seek without a hardware demodulator.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>
      84099a28
  3. 07 1月, 2014 1 次提交
  5. 18 8月, 2013 2 次提交
  7. 21 6月, 2013 1 次提交
  9. 27 5月, 2013 1 次提交
  11. 21 5月, 2013 1 次提交
  13. 25 4月, 2013 1 次提交
  15. 15 4月, 2013 4 次提交
  17. 25 3月, 2013 2 次提交
  19. 06 3月, 2013 1 次提交
  21. 06 2月, 2013 2 次提交
  23. 21 12月, 2012 1 次提交
  25. 19 12月, 2012 1 次提交
  27. 26 11月, 2012 2 次提交
  29. 29 10月, 2012 1 次提交
    • K
      [media] v4l2: Fix typo in struct v4l2_captureparm description · 2e74598d
      由 Kirill Smelkov 提交于 
      Judging from what drivers do and from my experience temeperframe
fraction is set in seconds - look e.g. here
    static int bttv_g_parm(struct file *file, void *f,
                                    struct v4l2_streamparm *parm)
    {
            struct bttv_fh *fh = f;
            struct bttv *btv = fh->btv;
            v4l2_video_std_frame_period(bttv_tvnorms[btv->tvnorm].v4l2_id,
                                        &parm->parm.capture.timeperframe);
    ...
    void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
    {
            if (id & V4L2_STD_525_60) {
                    frameperiod->numerator = 1001;
                    frameperiod->denominator = 30000;
            } else {
                    frameperiod->numerator = 1;
                    frameperiod->denominator = 25;
            }
and also v4l2-ctl in userspace decodes this as seconds:
    if (doioctl(fd, VIDIOC_G_PARM, &parm, "VIDIOC_G_PARM") == 0) {
            const struct v4l2_fract &tf = parm.parm.capture.timeperframe;
            ...
            printf("\tFrames per second: %.3f (%d/%d)\n",
                            (1.0 * tf.denominator) / tf.numerator,
                            tf.denominator, tf.numerator);
The typo was there from day 1 - added in 2002 in e028b61b ([PATCH]
add v4l2 api)(*)
(*) found in history tree
    git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.gitSigned-off-by: NKirill Smelkov <kirr@mns.spb.ru>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
      2e74598d
  31. 13 10月, 2012 1 次提交
  33. 06 10月, 2012 2 次提交
  35. 26 9月, 2012 3 次提交
  37. 15 9月, 2012 1 次提交
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  41. 31 7月, 2012 3 次提交
  43. 07 7月, 2012 3 次提交
  45. 06 7月, 2012 1 次提交
  47. 19 6月, 2012 1 次提交
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  51. 20 5月, 2012 1 次提交