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Retune FLAC compression levels 

This patch changes a the settings associated with compression
levels 6, 7 and 8. With this patch, -e is no longer used, but
instead apodization functions are added. This should improve
compression with at least 95% of all material while not changing
the speed much. Decoding ways, 6 and 8 stay the same, and 7 is
slowed a bit, which makes it as fast as 8.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
This commit is contained in:
Martijn van Beurden 2014-10-20 16:33:25 +02:00 committed by Erik de Castro Lopo
parent 69c2318b7b
commit 02891daa7a
1 changed files with 3 additions and 3 deletions
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6
src/libFLAC/stream_encoder.c
View File

@ -114,9 +114,9 @@ static struct CompressionLevels {
{ false, false, 6, 0, false, false, false, 0, 4, 0, "tukey(5e-1)" },
{ true , true , 8, 0, false, false, false, 0, 4, 0, "tukey(5e-1)" },
{ true , false, 8, 0, false, false, false, 0, 5, 0, "tukey(5e-1)" },
{ true , false, 8, 0, false, false, false, 0, 6, 0, "tukey(5e-1)" },
{ true , false, 8, 0, false, false, true , 0, 6, 0, "tukey(5e-1)" },
{ true , false, 12, 0, false, false, true , 0, 6, 0, "tukey(5e-1)" }
{ true , false, 8, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2)" },
{ true , false, 12, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2)" },
{ true , false, 12, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2);punchout_tukey(3)" }
/* here we use locale-independent 5e-1 instead of 0.5 or 0,5 */
};