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| author | Christophe Gisquet <christophe.gisquet@gmail.com> | 2014-06-04 20:48:58 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2014-06-05 01:47:07 +0200 |
| commit | 6848325acb80bb9a33d154b787db13c9d53b5a63 (patch) | |
| tree | 89164d31c4533459eed63d052a3ca3375ebab474 /libavcodec/huffyuvdec.c | |
| parent | a37020402a4c0c1f375bb7323ed5f79c2c75c538 (diff) | |
| download | ffmpeg-6848325acb80bb9a33d154b787db13c9d53b5a63.tar.gz | |
huffyuvdec: remove superfluous check
An invalid entry already has the property of having a negative number
of bits, so remove the check on the reserved value, and rearrange the
code as a consequence.
346800 decicycles in 422, 262079 runs, 65 skips
168197 decicycles in gray, 262077 runs, 67 skips
Overall time: 7.878s
319076 decicycles in 422, 262096 runs, 48 skips
159875 decicycles in gray, 262057 runs, 87 skips
Overall time: 7.394s
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/huffyuvdec.c')
| -rw-r--r-- | libavcodec/huffyuvdec.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c index 01c01ce00b..dc803cd931 100644 --- a/libavcodec/huffyuvdec.c +++ b/libavcodec/huffyuvdec.c @@ -586,13 +586,13 @@ static av_cold int decode_init_thread_copy(AVCodecContext *avctx) #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \ - bits, max_depth, rsvd ) \ + bits, max_depth) \ do { \ unsigned int index = SHOW_UBITS(name, gb, bits); \ - int code = dtable[index][0]; \ - int n = dtable[index][1]; \ + int code, n = dtable[index][1]; \ \ - if (code != rsvd && n>0) { \ + if (n>0) { \ + code = dtable[index][0]; \ dst0 = code>>8; \ dst1 = code; \ LAST_SKIP_BITS(name, gb, n); \ @@ -609,8 +609,7 @@ static av_cold int decode_init_thread_copy(AVCodecContext *avctx) #define READ_2PIX(dst0, dst1, plane1)\ UPDATE_CACHE(re, &s->gb); \ GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \ - s->vlc[0].table, s->vlc[plane1].table, \ - VLC_BITS, 3, 0xffff) + s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3) static void decode_422_bitstream(HYuvContext *s, int count) { @@ -640,8 +639,7 @@ static void decode_422_bitstream(HYuvContext *s, int count) #define READ_2PIX_PLANE(dst0, dst1, plane) \ UPDATE_CACHE(re, &s->gb); \ GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \ - s->vlc[plane].table, s->vlc[plane].table, \ - VLC_BITS, 3, 0xffff) + s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3) #define READ_2PIX_PLANE14(dst0, dst1, plane){\ int16_t code = get_vlc2(&s->gb, s->vlc[4+plane].table, VLC_BITS, 1);\ |