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add a -partition_limit option to limit the number of bits used by intra4x4

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Although it degrades quality, this option is useful to avoid the 512k
limit for partition #0.
If not enough to reach the lower bound of 4bits per macroblock header,
one should also limit the number of segments used (down to -segments 1)

See the man file for extra details.

Change-Id: Ia59ffac13176c85b809ddd6340d37b54ee9487ea
This commit is contained in:
Pascal Massimino
2011-08-23 15:58:22 -07:00
parent cd12b4b0ac
commit 900286e091
8 changed files with 56 additions and 8 deletions
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5
src/enc/vp8enci.h
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@ -359,8 +359,9 @@ struct VP8Encoder {
int block_count_[3];
// quality/speed settings
int method_; // 0=fastest, 6=best/slowest.
int rd_opt_level_; // Deduced from method_.
int method_; // 0=fastest, 6=best/slowest.
int rd_opt_level_; // Deduced from method_.
int max_i4_header_bits_; // partition #0 safeness factor
// Memory
VP8MBInfo* mb_info_; // contextual macroblock infos (mb_w_ + 1)