[FFmpeg-devel] [PATCH 1/7] lavc/flacenc: add sse4 version of the lpc encoder

[Michael Niedermayer]

On Fri, Feb 14, 2014 at 12:40:06PM +0100, James Darnley wrote:
> From 1.8 to 2.4 times faster.  Runtime is reduced by 2 to 39%.  The
> speed-up generally increases with compression_level.
> 
> This lpc encoder is not used with levels < 3 so it provides no speed-up
> in these cases.
> ---
>  LICENSE                         |    1 +
>  libavcodec/x86/Makefile         |    3 ++
>  libavcodec/x86/flac_dsp_gpl.asm |   76 +++++++++++++++++++++++++++++++++++++++
>  libavcodec/x86/flacdsp_init.c   |    4 ++
>  4 files changed, 84 insertions(+), 0 deletions(-)
>  create mode 100644 libavcodec/x86/flac_dsp_gpl.asm

fails to build

`ff_flac_enc_lpc_16_sse4' referenced in section `.text.unlikely' of libavcodec/libavcodec.a(flacdsp_init.o): defined in discarded section `.note.GNU-stack' of libavcodec/libavcodec.a(flac_dsp_gpl.o)
collect2: ld returned 1 exit status
make: *** [libavformat/seek-test] Error 1
make: *** Waiting for unfinished jobs....
`ff_flac_enc_lpc_16_sse4' referenced in section `.text.unlikely' of libavcodec/libavcodec.a(flacdsp_init.o): defined in discarded section `.note.GNU-stack' of libavcodec/libavcodec.a(flac_dsp_gpl.o)
collect2: ld returned 1 exit status
make: *** [libavfilter/filtfmts-test] Error 1
`ff_flac_enc_lpc_16_sse4' referenced in section `.text.unlikely' of libavcodec/libavcodec.a(flacdsp_init.o): defined in discarded section `.note.GNU-stack' of libavcodec/libavcodec.a(flac_dsp_gpl.o)
collect2: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1
`ff_flac_enc_lpc_16_sse4' referenced in section `.text.unlikely' of libavcodec/libavcodec.a(flacdsp_init.o): defined in discarded section `.note.GNU-stack' of libavcodec/libavcodec.a(flac_dsp_gpl.o)
collect2: ld returned 1 exit status
make: *** [ffprobe_g] Error 1

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

What does censorship reveal? It reveals fear. -- Julian Assange
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