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| author | Michael Niedermayer <michaelni@gmx.at> | 2010-01-07 03:54:10 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2010-01-07 03:54:10 +0000 |
| commit | 214cb565c053b9c20fb92d859b9a42121ebe5b83 (patch) | |
| tree | 8682cc436588e838974f93b5dad67e3e34f89753 | |
| parent | b0704443f20d5a058634cb8e1ceb08721272b9f0 (diff) | |
| download | ffmpeg-214cb565c053b9c20fb92d859b9a42121ebe5b83.tar.gz | |
Document several more things.
Originally committed as revision 21047 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/h263.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libavcodec/h263.c b/libavcodec/h263.c index 2dd6a15f05..44fa2f90ca 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -61,15 +61,32 @@ #define CBPC_B_VLC_BITS 3 #if CONFIG_ENCODERS +//The uni_DCtab_* tables below contain unified bits+length tables to encode DC +//differences in mpeg4. Unified in the sense that the specification specifies +//this encoding in several steps. static uint8_t uni_DCtab_lum_len[512]; static uint8_t uni_DCtab_chrom_len[512]; static uint16_t uni_DCtab_lum_bits[512]; static uint16_t uni_DCtab_chrom_bits[512]; +/** + * Table of number of bits a motion vector component needs. + */ static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; + +/** + * Minimal fcode that a motion vector component would need. + */ static uint8_t fcode_tab[MAX_MV*2+1]; + +/** + * Minimal fcode that a motion vector component would need in umv. + * All entries in this table are 1. + */ static uint8_t umv_fcode_tab[MAX_MV*2+1]; +//unified encoding tables for run length encoding of coefficients +//unified in the sense that the specification specifies the encoding in several steps. static uint32_t uni_mpeg4_intra_rl_bits[64*64*2*2]; static uint8_t uni_mpeg4_intra_rl_len [64*64*2*2]; static uint32_t uni_mpeg4_inter_rl_bits[64*64*2*2]; |