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Author: jernej

Audio pass through (AC3, DTS-HD, ...)

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Post time 2016-5-18 08:50:14 | Show all posts
I have made a clean build but I am experiencing video problems (switching between normal state and "no input signal" every few seconds). It looks familiar to issue reported by xonex here:
http://www.orangepi.org/orangepi ... &fromuid=914597

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 Author| Post time 2016-5-19 06:59:52 | Show all posts
I updated passthrough patches. Please pull latest sources and try again.

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Post time 2016-5-19 12:58:16 | Show all posts
I see it , and will tell you result tonight.

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Post time 2016-5-19 22:14:41 | Show all posts
Edited by manatouboji at 2016-5-20 00:43

Good news:  sounds are back , in the GUI.  for 2-channal AAC soundtrack MP4 files, sounds OK.

Bad news:
for  DD 5.1 track, AV Receiver display "Dolby Digital" , but sounds bad.

for DTS-HD MA track, no sound and no "DTS HD" displayed. but after turnoff Passthrough, stereo sound can be heard.

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 Author| Post time 2016-5-20 03:32:26 | Show all posts
Ok, thanks for testing. Can you delete patch projects/H3/patches/linux/linux-93-hdmi-fix-raw-output.patch, rebuild and retest?

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Post time 2016-5-20 11:14:29 | Show all posts
even worse,no any sound at all, no Dolby Digital 5.1 , no DTS.

Turn off Passtrough , no sound .

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 Author| Post time 2016-5-20 22:42:34 | Show all posts
Please test latest changes.  Can you also test latest released build? Now I'm beginning to understand what is needed for that and I'm just curious if it's working.

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Post time 2016-5-20 23:06:30 | Show all posts
The “even worse” one is just your asked one that  disabled the  linux-93 patch.

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 Author| Post time 2016-5-20 23:13:34 | Show all posts
Edited by jernej at 2016-5-20 16:23
manatouboji replied at 2016-5-20 16:06
The “even worse” one is just your asked one that  disabled the  linux-93 patch.

I know. In the mean time I pushed new code. However, it seems that there might not be need to do anything at all and latest pre-build images should work with passtrough.

Following formats should be supported:
PCM = 1,
        AC3 = 2,
        MPEG1 = 3,
        MP3 = 4,
        MPEG2 = 5,
        AAC = 6,
        DTS = 7,
        ATRAC = 8,
        ONE_BIT_AUDIO = 9,
        DOLBY_DIGITAL_PLUS = 10,
        DTS_HD = 11,
        MAT = 12,
        DST = 13,
        WMAPRO = 14.

TrueHD and DTS MA are obviously unsupported.

EDIT: Kodi doesn't support passthrough for all above formats.
EDIT2: Is MAT actually TrueHD?

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 Author| Post time 2016-5-20 23:31:23 | Show all posts
One github user confirmed working passthrough on unmodified images. It works for most formats except for DTS MA and TrueHD. At this point is unclear if this is HW limitation. Because it is very hard to do anything without actual HW and some passtrough formats work, I will put this effort on hold.
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