[FFmpeg-devel] [PATCH 0/5] DTS Express (LBR) decoder

[James Almer]

On 4/27/2016 2:19 PM, foo86 wrote:
> This moves several DCA tables around in preparation and adds decoder for DTS
> Express (LBR) format that is typically used for secondary audio tracks on BDs.
> 
> Current implementation supports decoding mono, stereo and 5.1 tracks at maximum
> sampling rate of 48 kHz. LFE decoding is only supported for 48 kHz tracks. 5.1
> tracks with embedded stereo downmix only decode the downmix because embedded
> channel set (ECS) processing is not supported (too annoying to implement for
> such obscure feature).
> 
> Decoder works reasonably well for various samples I've tested and is already
> quite fast: mono LBR track decodes around 1.8k times faster that realtime here.

Can those samples be used to make fate tests?

> 
> foo86 (5):
>   avcodec/dcaenc: reuse shared quant levels table
>   avcodec/dcaenc: move channel reordering tables to dcaenc.h
>   avcodec/dca: move huffman data into separate object file
>   avcodec/dca: move channel counter utility into dca.h
>   avcodec/dca: add DTS Express (LBR) decoder

Consider also sending a patch to add yourself as maintainer of dcadec (See the
MAINTAINERS file). And if you do you should also ask Michael to get push access
to the git repo.

> 
>  Changelog             |    1 +
>  libavcodec/Makefile   |    4 +-
>  libavcodec/dca.h      |   28 +
>  libavcodec/dca_core.c |   70 +-
>  libavcodec/dca_core.h |    2 +-
>  libavcodec/dca_exss.c |    9 +-
>  libavcodec/dca_lbr.c  | 1858 +++++++++++++++++++++++++++++++++++++++++++++++++
>  libavcodec/dca_lbr.h  |  130 ++++
>  libavcodec/dcadata.c  |  495 +++++++++++--
>  libavcodec/dcadata.h  |   47 +-
>  libavcodec/dcadec.c   |   26 +-
>  libavcodec/dcadec.h   |    5 +-
>  libavcodec/dcadsp.c   |   27 +
>  libavcodec/dcadsp.h   |    4 +
>  libavcodec/dcaenc.c   |   14 +-
>  libavcodec/dcaenc.h   |   45 +-
>  libavcodec/dcahuff.c  | 1337 +++++++++++++++++++++++++++++++++++
>  libavcodec/dcahuff.h  | 1046 +---------------------------
>  18 files changed, 3998 insertions(+), 1150 deletions(-)
>  create mode 100644 libavcodec/dca_lbr.c
>  create mode 100644 libavcodec/dca_lbr.h
>  create mode 100644 libavcodec/dcahuff.c
>