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Date:      Sat, 28 Jan 2012 11:26:03 +0200
From:      Alexander Motin <mav@FreeBSD.org>
To:        =?UTF-8?B?TWlja2HDq2wgTWFpbGxvdA==?= <mickael.maillot@gmail.com>
Cc:        freebsd-multimedia@freebsd.org, FreeBSD current <freebsd-current@freebsd.org>
Subject:   Re: [RFT] Major snd_hda rewrite
Message-ID:  <4F23BF2B.9050100@FreeBSD.org>
In-Reply-To: <CAKT0JB6wuw710qdJUw6UJ0XXQg2B_73MaJVck=PivJjBcrXnDw@mail.gmail.com>
References:  <4F0DE3FD.2020203@FreeBSD.org> <4F171D7A.4080003@FreeBSD.org> <CAKT0JB6u-b1CTcYVphLnEf-rHCmuSLJJFrYOiiqChJKDYtRHtQ@mail.gmail.com> <4F177979.5010106@FreeBSD.org> <CAKT0JB7k0V42w0WGN1mq4sKgQxqbnf_NoDRZAxPrMGebuvUH2g@mail.gmail.com> <CAKT0JB5zOjmy1R13W%2BbY453VySOkYcShpnHwk8kbT=-yAUC2vQ@mail.gmail.com> <CAKT0JB5xHJ7=UFHDhumsiMqfYGEPV6QyNz2YbHb%2BojOUgw23WA@mail.gmail.com> <4F1ACBA8.6000203@FreeBSD.org> <CAKT0JB7Z=pwv9oryCcu2OV7kHnkXjPj-cYY_=0c6PMbNF1BLTw@mail.gmail.com> <4F1EB305.9000105@FreeBSD.org> <4F1EDD3D.6070800@FreeBSD.org> <CAKT0JB5jAr6VP5Q9sBVG6hFrnn%2BWafEDWT43yKhdXJuWv4U8pw@mail.gmail.com> <4F1F31CA.5000507@FreeBSD.org> <4F1F34DB.9040405@FreeBSD.org> <CAKT0JB7KfOepO9C6dBx7TRoR4qDRQ3V=V69zz=9BFtWOwqhpMQ@mail.gmail.com> <4F1F412D.5040009@FreeBSD.org> <CAKT0JB4LbRPF2UjzPBSNSgRwpmuoyjMBs328-qG4XVJtm=WF7g@mail.gmail.com> <4F1FF2AD.9020003@FreeBSD.org> <CAKT0JB6wuw710qdJUw6UJ0XXQg2B_73MaJVck=PivJjBcrXnDw@mail.gmail.com>

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On 28.01.2012 04:58, Mickaƫl Maillot wrote:
> 2012/1/25 Alexander Motin <mav@freebsd.org <mailto:mav@freebsd.org>>
>
>
>     Commenting it appeared not good, as at least mplayer doesn't sets
>     channels for AC3. That makes sound(4) use default 1 channel for AC3,
>     that is definitely not supported. I believe this should be better:
>     http://svn.freebsd.org/__changeset/base/230537
>     <http://svn.freebsd.org/changeset/base/230537>;
>
>     Also, as soon as sound(4) interprets 8 channel as 7.1 by default,
>     I've changed previous patch a bit to allow both "8.0" and "7.1" AC3
>     formats:
>     http://svn.freebsd.org/__changeset/base/230513
>     <http://svn.freebsd.org/changeset/base/230513>;
>
>
> thank, i can set 8 channels without vchan now.
>
>     For me this at least doesn't break normal AC3 operation and when I
>     hacked mplayer to set 8 channels, I can see predictable codec
>     configuration and time in mplayer predictably running 4 times
>     faster. Unluckily mplayer seems doesn't support TrueHD passthrough
>     to ckeck closer -- it always does decoding.
>
>
> ok i think i found the problem: in
> http://svn.freebsd.org/changeset/base/230511
> cchn is equal to 7 for me if i set SNDCTL_DSP_CHANNELS to 8.
> and it's why HBR bit is not set.
>
> it's confirmed in my /v/l/messages where chan_count=0x7:
> Jan 28 03:23:53 htpc kernel: hdac1: 24576Kbps of 92160Kbps bandwidth used
> Jan 28 03:23:53 htpc kernel: pcm4: PCMDIR_PLAY: Stream setup
> fmt=02800400 (7.1) speed=192000
> Jan 28 03:23:53 htpc kernel: pcm4: PCMDIR_PLAY: Stream setup nid=4:
> fmt=0x1817, dfmt=0x0021, chan=0x0010, chan_count=0x07, stripe=1

You are right. Fixed: http://svn.freebsd.org/changeset/base/230641

Thank you!

-- 
Alexander Motin



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