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avcodec/aacps_common: Apply offset for VLCs during init 

This avoids having to apply it later after every get_vlc2().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-26 18:19:57 +02:00
parent 40a8cb9e6c
commit 5dc31bc67b
2 changed files with 10 additions and 10 deletions
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14
libavcodec/aacps_common.c
View File

@ -60,7 +60,7 @@ static const int huff_iid[] = {
static const VLCElem *vlc_ps[10];
#define READ_PAR_DATA(PAR, OFFSET, MASK, ERR_CONDITION, NB_BITS, MAX_DEPTH) \
#define READ_PAR_DATA(PAR, MASK, ERR_CONDITION, NB_BITS, MAX_DEPTH) \
/** \
* Read Inter-channel Intensity Difference/Inter-Channel Coherence/ \
* Inter-channel Phase Difference/Overall Phase Difference parameters from the \
@ -82,7 +82,7 @@ static int read_ ## PAR ## _data(void *logctx, GetBitContext *gb, PSCommonContex
int e_prev = e ? e - 1 : ps->num_env_old - 1; \
e_prev = FFMAX(e_prev, 0); \
for (b = 0; b < num; b++) { \
int val = PAR[e_prev][b] + get_vlc2(gb, vlc_table, NB_BITS, MAX_DEPTH) - OFFSET; \
int val = PAR[e_prev][b] + get_vlc2(gb, vlc_table, NB_BITS, MAX_DEPTH); \
if (MASK) val &= MASK; \
PAR[e][b] = val; \
if (ERR_CONDITION) \
@ -91,7 +91,7 @@ static int read_ ## PAR ## _data(void *logctx, GetBitContext *gb, PSCommonContex
} else { \
int val = 0; \
for (b = 0; b < num; b++) { \
val += get_vlc2(gb, vlc_table, NB_BITS, MAX_DEPTH) - OFFSET; \
val += get_vlc2(gb, vlc_table, NB_BITS, MAX_DEPTH); \
if (MASK) val &= MASK; \
PAR[e][b] = val; \
if (ERR_CONDITION) \
@ -104,9 +104,9 @@ err: \
return AVERROR_INVALIDDATA; \
}
READ_PAR_DATA(iid, huff_offset[table_idx], 0, FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant, 9, 3)
READ_PAR_DATA(icc, huff_offset[table_idx], 0, ps->icc_par[e][b] > 7U, 9, 2)
READ_PAR_DATA(ipdopd, 0, 0x07, 0, 5, 1)
READ_PAR_DATA(iid, 0, FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant, 9, 3)
READ_PAR_DATA(icc, 0, ps->icc_par[e][b] > 7U, 9, 2)
READ_PAR_DATA(ipdopd, 0x07, 0, 5, 1)
static int ps_read_extension_data(GetBitContext *gb, PSCommonContext *ps,
int ps_extension_id)
@ -300,7 +300,7 @@ av_cold void ff_ps_init_common(void)
ff_vlc_init_tables_from_lengths(&state, i <= 5 ? 9 : 5, huff_sizes[i],
&tab[0][1], 2,
&tab[0][0], 2, 1,
0, 0);
huff_offset[i], 0);
tab += huff_sizes[i];
}
}

6
libavcodec/aacpsdata.c
View File

@ -89,9 +89,9 @@ static const uint8_t aacps_huff_tabs[][2] = {
};
static const int8_t huff_offset[] = {
30, 30,
14, 14,
7, 7,
-30, -30,
-14, -14,
-7, -7,
0, 0,
0, 0,
};