ref: a12d8d28026964e74e5438010432a361d3c28aa6
parent: d0beb6c4a350758dd0a8013c3f3ff6636fab869c
author: lieff <lieff@users.noreply.github.com>
date: Thu Mar 29 13:15:18 EDT 2018
optimization: ~5% speedup at skylake@192kbps, now it's faster than mpg123
--- a/minimp3.h
+++ b/minimp3.h
@@ -812,20 +812,17 @@
for (j = 0; j < 2; j++, dst++, leaf >>= 4)
{int lsb = leaf & 0x0F;
- if (lsb)
+ if (lsb == 15 && linbits)
{- if (lsb == 15 && linbits)
- {- lsb += PEEK_BITS(linbits);
- FLUSH_BITS(linbits);
- CHECK_BITS;
- *dst = one*L3_pow_43(lsb)*((int32_t)bs_cache < 0 ? -1: 1);
- } else
- {- *dst = g_pow43_signed[lsb*2 + (bs_cache >> 31)]*one;
- }
- FLUSH_BITS(1);
+ lsb += PEEK_BITS(linbits);
+ FLUSH_BITS(linbits);
+ CHECK_BITS;
+ *dst = one*L3_pow_43(lsb)*((int32_t)bs_cache < 0 ? -1: 1);
+ } else
+ {+ *dst = g_pow43_signed[lsb*2 + (bs_cache >> 31)]*one;
}
+ FLUSH_BITS(lsb ? 1 : 0);
}
CHECK_BITS;
} while (--pairs_to_decode);