09.03.2015 15:11, Thomas Martitz wrote:
Am 08.03.2015 um 12:42 schrieb Alexander E. Patrakov:
But, why are you using the passthrough mode at all? HDMI, unlike
SPDIF, has enough bandwidth to pass the 7.1 PCM stream. For SPDIF,
passthrough was a necessity due to this bandwidth limitation. For real
HDMI (as opposed to HDMI-to-SPDIF converter that doesn't support
multichannel PCM anyway), it only serves marketing purposes (i.e., in
theory, provides no benefits over software decoding and sending the
resulting multichannel PCM stream). I sometimes think that the proper
fix is to disallow passthrough completely for multichannel HDMI
profiles, i.e. to effectively hide the checkboxes that you have
demonstrated on the screenshot.
1) You might want to decode Dolby Digital / DTS on an external receiver
because decoding on the PC requires a license.
Does not apply here - Xamindar is already willing to install Kodi and
VLC, products that include the decoder. But yes, theoretically, due to
bad laws in some countries, it is valid there.
2) Receivers might only accept spdif-data (plain stereo or encoded)
regardless of HDMI's theoretical capabilities.
Also does not apply here (but yes, it does apply if a TV is connected
via HDMI, and the receiver is connected to that TV via SPDIF, and the TV
does not have a built-in AC3 or DTS encoder). By selecting a
multichannel profile, Xamindar has already indicated that his receiver
is not of this variety.
If PA is actually unable to pass through in multichannel profiles, then
yes, pavucontrol should not show the check boxes, or better yet grey
them out with a "Change to stereo profile" tooltip.
I have already submitted a patch that hides these checkboxes. But it
seems like Arun is going to work on a better solution, so let's wait and
see the result :)
--
Alexander E. Patrakov
_______________________________________________
pulseaudio-discuss mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
