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| author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-10-25 23:11:42 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-12-08 17:51:45 +0100 |
| commit | a8646a7b3fc9833c4cb3dfc236264e60ea8bcec7 (patch) | |
| tree | 3ea0cac7490ec71799256bcc6ebed72f28ea193b | |
| parent | f86dcd007ffac5ab8098e6e222418179fe0ce17a (diff) | |
| download | ffmpeg-a8646a7b3fc9833c4cb3dfc236264e60ea8bcec7.tar.gz | |
avcodec/wnv1: Make array for initializing VLC smaller
This is possible by switching to ff_init_vlc_from_lengths() which allows
to replace the table for the codes (which need an uint16_t) by a table
of symbols which fit into an uint8_t. Also switch to an ordinary
INIT_VLC macro while just at it.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
| -rw-r--r-- | libavcodec/wnv1.c | 21 |
1 files changed, 8 insertions, 13 deletions
diff --git a/libavcodec/wnv1.c b/libavcodec/wnv1.c index b5cd0f0f0c..f8a9b94746 100644 --- a/libavcodec/wnv1.c +++ b/libavcodec/wnv1.c @@ -29,11 +29,10 @@ #include "get_bits.h" #include "internal.h" - -static const uint16_t code_tab[16][2] = { - { 0x17F, 9 }, { 0xBF, 8 }, { 0x5F, 7 }, { 0x2F, 6 }, { 0x17, 5 }, { 0x0B, 4 }, { 0x005, 3 }, - { 0x000, 1 }, - { 0x01, 3 }, { 0x03, 4 }, { 0x07, 5 }, { 0x0F, 6 }, { 0x1F, 7 }, { 0x3F, 8 }, { 0x07F, 9 }, { 0xFF, 8 } +static const uint8_t code_tab[16][2] = { + { 7, 1 }, { 8, 3 }, { 6, 3 }, { 9, 4 }, { 5, 4 }, { 10, 5 }, { 4, 5 }, + { 11, 6 }, { 3, 6 }, { 12, 7 }, { 2, 7 }, { 13, 8 }, { 1, 8 }, { 14, 9 }, + { 0, 9 }, { 15, 8 } }; #define CODE_VLC_BITS 9 @@ -115,16 +114,12 @@ static int decode_frame(AVCodecContext *avctx, static av_cold int decode_init(AVCodecContext *avctx) { - static VLC_TYPE code_table[1 << CODE_VLC_BITS][2]; - avctx->pix_fmt = AV_PIX_FMT_YUV422P; - code_vlc.table = code_table; - code_vlc.table_allocated = 1 << CODE_VLC_BITS; - init_vlc(&code_vlc, CODE_VLC_BITS, 16, - &code_tab[0][1], 4, 2, - &code_tab[0][0], 4, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); - + INIT_VLC_STATIC_FROM_LENGTHS(&code_vlc, CODE_VLC_BITS, 16, + &code_tab[0][1], 2, + &code_tab[0][0], 2, 1, + 0, INIT_VLC_OUTPUT_LE, 1 << CODE_VLC_BITS); return 0; } |