[alsa-devel] [PATCH 0/2] ALSA: hda - support HDMI HBR passthrough
anssi.hannula at iki.fi
Tue Aug 3 12:28:56 CEST 2010
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:
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.
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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