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| author | Mans Rullgard <mans@mansr.com> | 2011-07-22 00:13:27 +0100 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-07-22 23:39:31 +0100 |
| commit | b4cfb8254eeeb2fc0aa2c0c36a5ede208af47a79 (patch) | |
| tree | 4999eea6118df069146f8f4adfdbd2387b5b9d7c /libavcodec/dnxhddec.c | |
| parent | 406fbd24dc62db4853cb24b24f40caf3e70ee2e8 (diff) | |
| download | ffmpeg-b4cfb8254eeeb2fc0aa2c0c36a5ede208af47a79.tar.gz | |
dnxhddec: avoid a branch in 10-bit decode_dct_block()
The minimum weight value is 32 so this test can be skipped for the
10-bit case. Overall speedup 3-4%.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec/dnxhddec.c')
| -rw-r--r-- | libavcodec/dnxhddec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c index 426be2e985..63ccd08b48 100644 --- a/libavcodec/dnxhddec.c +++ b/libavcodec/dnxhddec.c @@ -239,7 +239,7 @@ static av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx, //av_log(ctx->avctx, AV_LOG_DEBUG, "j %d\n", j); //av_log(ctx->avctx, AV_LOG_DEBUG, "level %d, weight %d\n", level, weight_matrix[i]); level = (2*level+1) * qscale * weight_matrix[i]; - if (weight_matrix[i] != level_bias) + if (level_bias < 32 || weight_matrix[i] != level_bias) level += level_bias; level >>= level_shift; |