From: Clemens Ladisch <clemens@ladisch.de>
To: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: alsa-devel@alsa-project.org
Subject: Re: [RFC] [PATCH] firewire-lib: Use IEC 61883-6 compliant labels for Raw Audio/
Date: Sat, 31 May 2014 09:35:11 +0200 [thread overview]
Message-ID: <5389862F.7060309@ladisch.de> (raw)
In-Reply-To: <5389818C.7080205@sakamocchi.jp>
Takashi Sakamoto wrote:
> I don't touch this label issue with my patchset because there is a bit
> possibility to cause a regression. But now, I have a confidence that
> this modification is reasonable. In detail, please see an attached patch.
> According to AM824 in IEC 61883-6:2002, 2 bits in LSB of label for Raw Audio
> data means Valid Length Code (VBL). Ths value is:
> - b00 for 24 bits sample (label is 0x40)
> - b01 for 20 bits sample (label is 0x41)
> - b10 for 16 bits sample (label is 0x42)
>
> But current firewire-lib apply 24 bits label for both of 16/24 bits samples.
>
> As long as I investigate with BeBoB/Fireworks and OXFW, all of them have a
> behaviour to ignore this label
Same for DICE.
Acked-by: Clemens Ladisch <clemens@ladisch.de>
next prev parent reply other threads:[~2014-05-31 7:35 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-31 7:15 [RFC] [PATCH] firewire-lib: Use IEC 61883-6 compliant labels for Raw Audio/ Takashi Sakamoto
2014-05-31 7:35 ` Clemens Ladisch [this message]
2014-05-31 7:51 ` Takashi Sakamoto
2014-06-01 6:23 ` Takashi Iwai
2014-06-01 15:07 ` Takashi Sakamoto
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