Re: saa7134_empress streaming via v4l2

["Gordon Smith" <spider.karma+video4linux-list@xxxxxxxxx>]

On Tue, Aug 26, 2008 at 2:58 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> On Tuesday 26 August 2008 22:27:03 Gordon Smith wrote:
>> Hello -
>>
>> I have a RTD Technologies VFG7350 (saa7134 based, two channel,
> hardware
>> encoder per channel, no tuner).
>>
>> Should v4l2 show MPEG extended controls for a saa7134_empress device?
>
> Not in that kernel. It was broken.
>
>> If so,
>> any hints about how to restore the controls?
>
> I would love it if you could try this development tree:
> http://linuxtv.org/hg/~hverkuil/v4l-dvb-empress/
>
> I literally merged the last change this evening to 'revive' the empress
> driver after it was solidly broken in recent kernels. It should have
> the MPEG controls and I would really like to know whether it is working
> for you.
>
> For my BeholdTV M6 card I see the standard user controls on both
> devices, I get the private controls on the first device and I get the
> MPEG controls on the second device.
>
> Regards,
>
>        Hans
>

An update after private discussion with Hans Verkuil:

Using either a fresh v4l-dvb (as of today) or the codebase listed
above, saa7134 based card now has MPEG controls restored.

Solution was:
 - Update code
 - Remove i2c address parameters (force and ignore) from saa6752hs
module (that were necessary in the past?)

In 2.6.25-gentoo-r7 + v4l-dvb, MPEG controls have returned:
{{{
$ v4l2-apps/util/v4l2-ctl --list-ctrls --device /dev/video2

User Controls

                     brightness (int)  : min=0 max=255 step=1
default=128 value=128
                       contrast (int)  : min=0 max=127 step=1
default=68 value=68
                     saturation (int)  : min=0 max=127 step=1
default=64 value=64
                            hue (int)  : min=-128 max=127 step=1
default=0 value=0
                         volume (int)  : min=-15 max=15 step=1 default=0 value=0
                           mute (bool) : default=0 value=1
                         mirror (bool) : default=0 value=0

MPEG Encoder Controls

                    stream_type (menu) : min=1 max=1 default=1 value=1
flags=update
       audio_sampling_frequency (menu) : min=1 max=1 default=1 value=1
                 audio_encoding (menu) : min=1 max=1 default=1 value=1
flags=update
         audio_layer_ii_bitrate (menu) : min=11 max=13 default=11 value=11
                 video_encoding (menu) : min=1 max=1 default=1 value=1
                   video_aspect (menu) : min=1 max=2 default=1 value=1
             video_bitrate_mode (menu) : min=0 max=1 default=0 value=0
flags=update
                  video_bitrate (int)  : min=0 max=27000000 step=1
default=6000000 value=0
             video_peak_bitrate (int)  : min=0 max=27000000 step=1
default=8000000 value=0

}}}

>>
>> Below is control listing in 2.6.25-gentoo-r7 + v4l-dvb:
>> ----------------------------------------
>> $ v4l2-ctl  --list-ctrls --device=/dev/video2
>>
>> User Controls
>>
>>                      brightness (int)  : min=0 max=255 step=1
> default=128
>> value=128
>>                        contrast (int)  : min=0 max=127 step=1
> default=68
>> value=68
>>                      saturation (int)  : min=0 max=127 step=1
> default=64
>> value=64
>>                             hue (int)  : min=-128 max=127 step=1
> default=0
>> value=0
>>                          volume (int)  : min=-15 max=15 step=1
> default=0
>> value=0
>>                            mute (bool) : default=0 value=1
>>                          mirror (bool) : default=0 value=0
>>
>> MPEG Encoder Controls
>> ----------------------------------------
>>
>> Below is control listing in 2.6.22-gentoo-r10 (also shows "private
>> controls"):
>> ----------------------------------------
>> $ v4l2-ctl  --list-ctrls --device=/dev/video2
>>                      brightness (int)  : min=0 max=255 step=1
> default=128
>> value=128
>>                        contrast (int)  : min=0 max=127 step=1
> default=68
>> value=68
>>                      saturation (int)  : min=0 max=127 step=1
> default=64
>> value=64
>>                             hue (int)  : min=-128 max=127 step=1
> default=0
>> value=0
>>                          volume (int)  : min=-15 max=15 step=1
> default=0
>> value=0
>>                            mute (bool) : default=0 value=1
>>                          mirror (bool) : default=0 value=0
>>                          invert (bool) : default=0 value=0
>>              y_offset_odd_field (int)  : min=0 max=128 step=0
> default=0
>> value=0
>>             y_offset_even_field (int)  : min=0 max=128 step=0
> default=0
>> value=0
>>                        automute (bool) : default=1 value=1
>> ----------------------------------------
>>
>> Any hints also about how to restore the "private controls" (invert -
>> automute)?
>>
>> Thanks.
>> - Gordon
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