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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-03-25 17:12:26 -0400 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-03-27 11:30:09 -0400 |
| commit | 991f3de1bb696a55f7604e4b7d53492299fe44b5 (patch) | |
| tree | 993eac29de22803e695d56a72ccb95ec1aefae81 /libavcodec/ac3.h | |
| parent | c6c2dfcf15c1d93b2189adff6f71c5c4b6b05338 (diff) | |
| download | ffmpeg-991f3de1bb696a55f7604e4b7d53492299fe44b5.tar.gz | |
ac3enc: Add codec-specific options for writing AC-3 metadata.
Diffstat (limited to 'libavcodec/ac3.h')
| -rw-r--r-- | libavcodec/ac3.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavcodec/ac3.h b/libavcodec/ac3.h index e653b2e95d..133c5b9a78 100644 --- a/libavcodec/ac3.h +++ b/libavcodec/ac3.h @@ -48,6 +48,17 @@ #define EXP_D25 2 #define EXP_D45 3 +/* pre-defined gain values */ +#define LEVEL_PLUS_3DB 1.4142135623730950 +#define LEVEL_PLUS_1POINT5DB 1.1892071150027209 +#define LEVEL_MINUS_1POINT5DB 0.8408964152537145 +#define LEVEL_MINUS_3DB 0.7071067811865476 +#define LEVEL_MINUS_4POINT5DB 0.5946035575013605 +#define LEVEL_MINUS_6DB 0.5000000000000000 +#define LEVEL_MINUS_9DB 0.3535533905932738 +#define LEVEL_ZERO 0.0000000000000000 +#define LEVEL_ONE 1.0000000000000000 + /** Delta bit allocation strategy */ typedef enum { DBA_REUSE = 0, |