linux-kernel - Re: [PATCH 0/2] ALSA: hda - support HDMI HBR passthrough

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Date:	Tue, 03 Aug 2010 12:59:09 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Anssi Hannula <anssi.hannula@....fi>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] ALSA: hda - support HDMI HBR passthrough

At Tue,  3 Aug 2010 13:28:56 +0300,
Anssi Hannula wrote:
> 
> Hi all!
> 
> This patchset adds support for passing through IEC 61937 encapsulated
> compressed audio at high bitrates (i.e. those over 6.144Mbps).
> At least TrueHD and DTS-HD are such formats.
> 
> I've tested this using an NVIDIA hdmi codec and the following ffmpeg
> patch which adds support for TrueHD in its IEC 61937 muxer:
> http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2010-August/094317.html
> 
> One needs to set the AES0 & 0x02 (non-audio) bit during playback so that
> the data is not transmitted as normal 8 channel PCM audio.

Thanks, I applied both patches.

There are some magic numbers there like 0x8000, and I'm going to define
them...


Takashi

> 
> ---
> Anssi Hannula (2):
>       ALSA: hda - Set Stream Type in Stream Format according to AES0
>       ALSA: hda - Add support for HDMI HBR passthrough
> 
>  sound/pci/hda/hda_codec.c       |    6 ++++-
>  sound/pci/hda/hda_codec.h       |    6 ++++-
>  sound/pci/hda/hda_intel.c       |    3 +-
>  sound/pci/hda/patch_hdmi.c      |   40 ++++++++++++++++++++++++++++++++++++++-
>  sound/pci/hda/patch_intelhdmi.c |    3 +-
>  sound/pci/hda/patch_nvhdmi.c    |    3 +-
>  6 files changed, 53 insertions(+), 8 deletions(-)
> 
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