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| author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-10-29 16:13:03 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-12-08 17:51:44 +0100 |
| commit | d2e55e3aa1a1c204dc93c09018779265ac017971 (patch) | |
| tree | aa2f127aaa292f867f9d807429bea2a27bed360e /libavcodec/tscc2.c | |
| parent | f55da066ec82da220b729bd7bc5a9a836baeb68d (diff) | |
| download | ffmpeg-d2e55e3aa1a1c204dc93c09018779265ac017971.tar.gz | |
avcodec/tscc2: Reduce the size of the tables used to initialize VLCs
After permuting both the codes, lengths and symbols tables so that
the codes tables are ordered from left to right in the tree, the codes
tables can be easily computed from the lengths tables at runtime and
therefore omitted. This saves about 2KB from the binary.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Diffstat (limited to 'libavcodec/tscc2.c')
| -rw-r--r-- | libavcodec/tscc2.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/libavcodec/tscc2.c b/libavcodec/tscc2.c index 630e17522c..c4d275bb23 100644 --- a/libavcodec/tscc2.c +++ b/libavcodec/tscc2.c @@ -62,24 +62,24 @@ static av_cold int init_vlcs(TSCC2Context *c) { int i, ret; - ret = ff_init_vlc_sparse(&c->dc_vlc, 9, DC_VLC_COUNT, - tscc2_dc_vlc_bits, 1, 1, - tscc2_dc_vlc_codes, 2, 2, - tscc2_dc_vlc_syms, 2, 2, INIT_VLC_LE); + ret = ff_init_vlc_from_lengths(&c->dc_vlc, 9, DC_VLC_COUNT, + tscc2_dc_vlc_lens, 1, + tscc2_dc_vlc_syms, 2, 2, + 0, INIT_VLC_OUTPUT_LE, c->avctx); if (ret) return ret; for (i = 0; i < NUM_VLC_SETS; i++) { - ret = ff_init_vlc_sparse(c->nc_vlc + i, 9, 16, - tscc2_nc_vlc_bits[i], 1, 1, - tscc2_nc_vlc_codes[i], 2, 2, - tscc2_nc_vlc_syms, 1, 1, INIT_VLC_LE); + ret = ff_init_vlc_from_lengths(c->nc_vlc + i, 9, 16, + tscc2_nc_vlc_lens[i], 1, + tscc2_nc_vlc_syms[i], 1, 1, + 0, INIT_VLC_OUTPUT_LE, c->avctx); if (ret) return ret; - ret = ff_init_vlc_sparse(c->ac_vlc + i, 9, tscc2_ac_vlc_sizes[i], - tscc2_ac_vlc_bits[i], 1, 1, - tscc2_ac_vlc_codes[i], 2, 2, - tscc2_ac_vlc_syms[i], 2, 2, INIT_VLC_LE); + ret = ff_init_vlc_from_lengths(c->ac_vlc + i, 9, tscc2_ac_vlc_sizes[i], + tscc2_ac_vlc_bits[i], 1, + tscc2_ac_vlc_syms[i], 2, 2, + 0, INIT_VLC_OUTPUT_LE, c->avctx); if (ret) return ret; } |