Module: libav Branch: master Commit: b4cfb8254eeeb2fc0aa2c0c36a5ede208af47a79
Author: Mans Rullgard <[email protected]> Committer: Mans Rullgard <[email protected]> Date: Fri Jul 22 00:13:27 2011 +0100 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 <[email protected]> --- libavcodec/dnxhddec.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c index 426be2e..63ccd08 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; _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
