Re: [PATCH v4] venus: venc: Fix enum frameintervals

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Hi Stanimir,

On Thu, 17 Oct 2019 at 17:47, Stanimir Varbanov
<stanimir.varbanov@xxxxxxxxxx> wrote:
>
> Hi Loic,
>
> On 10/17/19 6:08 PM, Loic Poulain wrote:
> > Hi Stanimir,
> >
> > On Thu, 3 Oct 2019 at 12:15, Stanimir Varbanov
> > <stanimir.varbanov@xxxxxxxxxx> wrote:
> >>
> >> I have tested this on db410c with following gst pipeline:
> >>
> >> gst-launch-1.0 -v videotestsrc !
> >> video/x-raw,format=NV12,width=1280,height=960,framerate=24/1 !
> >> v4l2h264enc
> >> extra-controls="controls,h264_profile=4,h264_level="5",video_bitrate=10000000;"
> >> ! filesink location=gstenc.h264
> >>
> >> Loic, could you give it a try on db820c too?
> >>
> >> Here is the info on the bug which I try to fix with current patch:
> >>
> >> https://bugs.96boards.org/show_bug.cgi?id=513
> >>
> >> On 10/3/19 1:10 PM, Stanimir Varbanov wrote:
> >>> This fixes an issue when setting the encoder framerate because of
> >>> missing precision. Now the frameinterval type is changed to
> >>> TYPE_CONTINUOUS and step = 1. Also the math is changed when
> >>> framerate property is called - the firmware side expects the
> >>> framerate in Q16 values.
> >>>
> >>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx>
> >>> ---
> >>>
> >>> Changes since v3:
> >>> Keep min/max numerator one, and divide frate(max/min) to frame
> >>> factor (returned framerate max/min capabilities are in range
> >>> 1 to 120fps but in Q16 i.e. 65536 to 7864320).
> >>>
> >>>  drivers/media/platform/qcom/venus/venc.c | 17 ++++++++++++-----
> >>>  1 file changed, 12 insertions(+), 5 deletions(-)
> >>>
> >>> diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
> >>> index 1b7fb2d5887c..133ff7eceb83 100644
> >>> --- a/drivers/media/platform/qcom/venus/venc.c
> >>> +++ b/drivers/media/platform/qcom/venus/venc.c
> >>> @@ -22,6 +22,7 @@
> >>>  #include "venc.h"
> >>>
> >>>  #define NUM_B_FRAMES_MAX     4
> >>> +#define FRAMERATE_FACTOR     BIT(16)
> >>>
> >>>  /*
> >>>   * Three resons to keep MPLANE formats (despite that the number of planes
> >>> @@ -576,7 +577,7 @@ static int venc_enum_frameintervals(struct file *file, void *fh,
> >>>       struct venus_inst *inst = to_inst(file);
> >>>       const struct venus_format *fmt;
> >>>
> >>> -     fival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
> >>> +     fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
> >>>
> >>>       fmt = find_format(inst, fival->pixel_format,
> >>>                         V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
> >>> @@ -600,11 +601,11 @@ static int venc_enum_frameintervals(struct file *file, void *fh,
> >>>               return -EINVAL;
> >>>
> >>>       fival->stepwise.min.numerator = 1;
> >>> -     fival->stepwise.min.denominator = frate_max(inst);
> >>> +     fival->stepwise.min.denominator = frate_max(inst) / FRAMERATE_FACTOR;
> >
> > On 820c frate_max() returns 120 set denominator to 0, and causes
> > gstreamer failure.
>
> OK, thanks!
>
> We have two options
> - unify frate_min/max() to return in Q16 depending on the hfi version
> - or move frame_factor in frate_min/max() and return the framerate (1..120)

No strong preference...

Regards,
Loic



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