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Code Issues Releases Activity

avcodec/dcahuff: Avoid redundant offset table

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-09-05 21:49:23 +02:00
parent 13cddfc453
commit 649a2d8d52
1 changed files with 10 additions and 20 deletions
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30
libavcodec/dcahuff.c
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@ -1232,17 +1232,6 @@ static const uint8_t rsd_bitvals[18] = {
6, 4,
};
static const uint16_t vlc_offs[80] = {
0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364,
5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508,
5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564,
7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240,
12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264,
18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622, 24200, 24748, 25276,
25792, 26306, 26826, 26890, 26954, 27468, 27500, 28038, 28554, 29086, 29630,
30150, 30214
};
DCAVLC ff_dca_vlc_bit_allocation;
DCAVLC ff_dca_vlc_transition_mode;
DCAVLC ff_dca_vlc_scale_factor;
@ -1264,14 +1253,15 @@ VLC ff_dca_vlc_rsd;
av_cold void ff_dca_init_vlcs(void)
{
static VLCElem dca_table[30214];
int i, j, k = 0;
unsigned offset = 0;
int i, j;
#define DCA_INIT_VLC(vlc, a, b, c, d) \
do { \
vlc.table = &dca_table[vlc_offs[k]]; \
vlc.table_allocated = vlc_offs[k + 1] - vlc_offs[k]; \
init_vlc(&vlc, a, b, c, 1, 1, d, 2, 2, INIT_VLC_USE_NEW_STATIC); \
k++; \
vlc.table = &dca_table[offset]; \
vlc.table_allocated = FF_ARRAY_ELEMS(dca_table) - offset; \
init_vlc(&vlc, a, b, c, 1, 1, d, 2, 2, INIT_VLC_STATIC_OVERLONG); \
offset += vlc.table_size; \
} while (0)
ff_dca_vlc_bit_allocation.offset = 1;
@ -1302,14 +1292,14 @@ av_cold void ff_dca_init_vlcs(void)
#define LBR_INIT_VLC(vlc, tab, nb_bits) \
do { \
vlc.table = &dca_table[vlc_offs[k]]; \
vlc.table_allocated = vlc_offs[k + 1] - vlc_offs[k]; \
vlc.table = &dca_table[offset]; \
vlc.table_allocated = FF_ARRAY_ELEMS(dca_table) - offset; \
ff_init_vlc_sparse(&vlc, nb_bits, FF_ARRAY_ELEMS(tab##_codes), \
&tab##_bitvals[0], 2, 1, \
tab##_codes, 2, 2, \
&tab##_bitvals[1], 2, 1, \
INIT_VLC_LE | INIT_VLC_USE_NEW_STATIC); \
k++; \
INIT_VLC_LE | INIT_VLC_STATIC_OVERLONG); \
offset += vlc.table_size; \
} while (0)
LBR_INIT_VLC(ff_dca_vlc_tnl_grp[0], tnl_grp_0, 9);