[FFmpeg-cvslog] avcodec/dnxhddec: Use VLC symbol table to avoid lookup
Andreas Rheinhardt
git at videolan.org
Sat Sep 16 16:06:29 EEST 2023
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Sat Sep 16 02:54:54 2023 +0200| [4dae62f7081eda648adb76d47aef90e872606905] | committer: Andreas Rheinhardt
avcodec/dnxhddec: Use VLC symbol table to avoid lookup
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4dae62f7081eda648adb76d47aef90e872606905
---
libavcodec/dnxhddec.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/libavcodec/dnxhddec.c b/libavcodec/dnxhddec.c
index b5f4e053c0..703d0e341c 100644
--- a/libavcodec/dnxhddec.c
+++ b/libavcodec/dnxhddec.c
@@ -142,9 +142,10 @@ static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
ctx->cid_table->dc_bits, 1, 1,
ctx->cid_table->dc_codes, 1, 1, 0)) < 0)
goto out;
- if ((ret = vlc_init(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
+ if ((ret = ff_vlc_init_sparse(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
ctx->cid_table->run_bits, 1, 1,
- ctx->cid_table->run_codes, 2, 2, 0)) < 0)
+ ctx->cid_table->run_codes, 2, 2,
+ ctx->cid_table->run, 1, 1, 0)) < 0)
goto out;
ctx->cid = cid;
@@ -358,7 +359,7 @@ static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
int level_shift,
int dc_shift)
{
- int i, j, index1, index2, len, flags;
+ int i, j, index1, len, flags;
int level, component, sign;
const int *scale;
const uint8_t *weight_matrix;
@@ -425,10 +426,11 @@ static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
}
if (flags & 2) {
+ int run;
UPDATE_CACHE(bs, &row->gb);
- GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
+ GET_VLC(run, bs, &row->gb, ctx->run_vlc.table,
DNXHD_VLC_BITS, 2);
- i += ctx->cid_table->run[index2];
+ i += run;
}
if (++i > 63) {
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