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| author | Justin Ruggles <justin.ruggles@gmail.com> | 2011-07-13 12:20:29 -0400 |
|---|---|---|
| committer | Justin Ruggles <justin.ruggles@gmail.com> | 2011-07-19 14:15:00 -0400 |
| commit | 08a747afb98c11da48b89339c2f1c5fdc56ced7e (patch) | |
| tree | 15266498fd82587fc6540fcc60333c242d317175 /libavcodec/ac3enc.h | |
| parent | 31b69928e5fd3d40dda4091ae7db340c582113af (diff) | |
eac3enc: use frame exponent strategy when applicable.
This checks if the set of selected exponent strategies for all blocks in a
channel are in the frame exponent strategy table, and if so, writes the
table index instead of each strategy. This saves up to 7 bits per channel per
frame, so the overall effect on quality is small.
Diffstat (limited to 'libavcodec/ac3enc.h')
| -rw-r--r-- | libavcodec/ac3enc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/ac3enc.h b/libavcodec/ac3enc.h index 6caf4d80c4..a4a8fd4325 100644 --- a/libavcodec/ac3enc.h +++ b/libavcodec/ac3enc.h @@ -217,6 +217,8 @@ typedef struct AC3EncodeContext { uint8_t *cpl_coord_mant_buffer; uint8_t exp_strategy[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< exponent strategies + uint8_t frame_exp_strategy[AC3_MAX_CHANNELS]; ///< frame exp strategy index + int use_frame_exp_strategy; ///< indicates use of frame exp strategy uint8_t exp_ref_block[AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< reference blocks for EXP_REUSE uint8_t *ref_bap [AC3_MAX_CHANNELS][AC3_MAX_BLOCKS]; ///< bit allocation pointers (bap) int ref_bap_set; ///< indicates if ref_bap pointers have been set |