[FFmpeg-devel] [PATCH 28/61] avcodec/vqcdec: Avoid unnecessary VLC structure
Andreas Rheinhardt
andreas.rheinhardt at outlook.com
Wed Sep 27 01:16:59 EEST 2023
Everything besides VLC.table is basically write-only
and even VLC.table can be removed by accessing the
underlying table directly.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
---
libavcodec/vqcdec.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)
diff --git a/libavcodec/vqcdec.c b/libavcodec/vqcdec.c
index 462d810a2f..dc9248d99f 100644
--- a/libavcodec/vqcdec.c
+++ b/libavcodec/vqcdec.c
@@ -49,14 +49,15 @@ static const int8_t vector_symbols[] = {
2, 3, 4, SIGNED_8BIT, -2, -3, -4, SIGNED_6BIT
};
-static VLC vector_vlc;
+static VLCElem vector_vlc[1 << VECTOR_VLC_BITS];
static av_cold void vqc_init_static_data(void)
{
- VLC_INIT_STATIC_FROM_LENGTHS(&vector_vlc, VECTOR_VLC_BITS, FF_ARRAY_ELEMS(vector_nbits),
- vector_nbits, 1,
- vector_symbols, 1, 1,
- 0, 0, 1 << VECTOR_VLC_BITS);
+ VLC_INIT_STATIC_TABLE_FROM_LENGTHS(vector_vlc, VECTOR_VLC_BITS,
+ FF_ARRAY_ELEMS(vector_nbits),
+ vector_nbits, 1,
+ vector_symbols, 1, 1,
+ 0, 0);
}
typedef struct VqcContext {
@@ -171,7 +172,7 @@ static int decode_vectors(VqcContext * s, const uint8_t * buf, int size, int wid
continue;
}
- symbol = get_vlc2(&gb, vector_vlc.table, VECTOR_VLC_BITS, 1);
+ symbol = get_vlc2(&gb, vector_vlc, VECTOR_VLC_BITS, 1);
switch(symbol) {
case SKIP_3: dst += 3; break;
case SKIP_4: dst += 4; break;
--
2.34.1
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