[FFmpeg-devel] [RFC 00/10] AV_SAMPLE_FMT_DSD

Michael Niedermayer michaelni at gmx.at
Tue May 6 19:12:59 CEST 2014

On Tue, May 06, 2014 at 10:37:32PM +1000, Peter Ross wrote:
> RFC:
> Direct Stream Digital (DSD), a.k.a One bit audio (OBA), is an alternative to PCM.
> It can be found in Super Audio CDs and hi-res downloadable music.
> Changes:
> - add sample fmt
> - move DSD-to-PCM conversion from libavcodec/dsddec into libswresample
> - DSD-over-PCM encoder, enabling bit perfect playback to external hardware
> Peter Ross (10):
>   swresample/audioconvert: integrate DSD to PCM conversion
>   swresample/audioconvert: display error message if not conversion not
>     supported
>   avfiter/af_aresample: when converting DSD->PCM and no output sample
>     rate is specified, reduce output sample rate by
>     swr_dsd2pcm_sr_factor()
>   avcodec/dsd: rework codecs to use AV_SAMPLE_FMT_DSD
>   avformat/uncodedframecrcenc: process AV_SAMPLE_FMT_DSD and
>   DSD-over-PCM (DoP)
>   avformat/riff: enable DoP muxing
>   avformat/iff: report actual DSD sample rate
>   avformat/dsfdec: report actual DSD sample rate

havnt really looked the patches yet but
fails to build with shared libs
libswresample/libswresample.so: undefined reference to `ff_reverse'
libswresample/libswresample.so: undefined reference to `ff_reverse'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ffprobe_g] Error 1
make: *** Waiting for unfinished jobs....


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The greatest way to live with honor in this world is to be what we pretend
to be. -- Socrates
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