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| author | James Darnley <james.darnley@gmail.com> | 2014-08-12 23:22:03 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-08-13 03:09:26 +0200 |
| commit | 54a51d384055a771ba1eeef3c2f399bd03fa2663 (patch) | |
| tree | 2d7e770fb0fcfebaba0b4ef02f9714e07109f4c2 /libavcodec/flacenc.c | |
| parent | a8592db9bb787e6cd3aece69ce211cb97bd718cd (diff) | |
| download | ffmpeg-54a51d384055a771ba1eeef3c2f399bd03fa2663.tar.gz | |
lavc/flacenc: partially unroll loop in flac_enc_lpc_16
It now does 12 samples per iteration, up from 4.
From 1.8 to 3.2 times faster again. 3.6 to 5.7 times faster overall.
Runtime is reduced by a further 2 to 18%. Overall runtime reduced by
4 to 50%.
Same conditions as before apply.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/flacenc.c')
| -rw-r--r-- | libavcodec/flacenc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c index f37bab8f3e..3b72888966 100644 --- a/libavcodec/flacenc.c +++ b/libavcodec/flacenc.c @@ -80,7 +80,7 @@ typedef struct FlacSubframe { int shift; RiceContext rc; int32_t samples[FLAC_MAX_BLOCKSIZE]; - int32_t residual[FLAC_MAX_BLOCKSIZE+3]; + int32_t residual[FLAC_MAX_BLOCKSIZE+11]; } FlacSubframe; typedef struct FlacFrame { |