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Code Issues Releases Activity

avcodec/asvdec: Reduce the size of some VLCs

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Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-10-12 10:48:29 +02:00
parent 6608ecb1b5
commit 2a8edb1ad3
1 changed files with 15 additions and 12 deletions
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27
libavcodec/asvdec.c
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@ -34,7 +34,10 @@
#include "mathops.h"
#include "mpeg12data.h"
#define VLC_BITS 6
#define CCP_VLC_BITS 5
#define DC_CCP_VLC_BITS 4
#define AC_CCP_VLC_BITS 6
#define ASV1_LEVEL_VLC_BITS 4
#define ASV2_LEVEL_VLC_BITS 10
static VLC ccp_vlc;
@ -50,18 +53,18 @@ static av_cold void init_vlcs(ASV1Context *a)
if (!done) {
done = 1;
INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
INIT_VLC_STATIC(&ccp_vlc, CCP_VLC_BITS, 17,
&ff_asv_ccp_tab[0][1], 2, 1,
&ff_asv_ccp_tab[0][0], 2, 1, 64);
INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
&ff_asv_ccp_tab[0][0], 2, 1, 32);
INIT_VLC_STATIC(&dc_ccp_vlc, DC_CCP_VLC_BITS, 8,
&ff_asv_dc_ccp_tab[0][1], 2, 1,
&ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
&ff_asv_dc_ccp_tab[0][0], 2, 1, 16);
INIT_VLC_STATIC(&ac_ccp_vlc, AC_CCP_VLC_BITS, 16,
&ff_asv_ac_ccp_tab[0][1], 2, 1,
&ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
INIT_VLC_STATIC(&level_vlc, ASV1_LEVEL_VLC_BITS, 7,
&ff_asv_level_tab[0][1], 2, 1,
&ff_asv_level_tab[0][0], 2, 1, 64);
&ff_asv_level_tab[0][0], 2, 1, 16);
INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
&ff_asv2_level_tab[0][1], 2, 1,
&ff_asv2_level_tab[0][0], 2, 1, 1024);
@ -76,7 +79,7 @@ static inline int asv2_get_bits(GetBitContext *gb, int n)
static inline int asv1_get_level(GetBitContext *gb)
{
int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
int code = get_vlc2(gb, level_vlc.table, ASV1_LEVEL_VLC_BITS, 1);
if (code == 3)
return get_sbits(gb, 8);
@ -101,7 +104,7 @@ static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
block[0] = 8 * get_bits(&a->gb, 8);
for (i = 0; i < 11; i++) {
const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
const int ccp = get_vlc2(&a->gb, ccp_vlc.table, CCP_VLC_BITS, 1);
if (ccp) {
if (ccp == 16)
@ -133,7 +136,7 @@ static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
block[0] = 8 * asv2_get_bits(&a->gb, 8);
ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, DC_CCP_VLC_BITS, 1);
if (ccp) {
if (ccp & 4)
block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
@ -144,7 +147,7 @@ static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
}
for (i = 1; i < count + 1; i++) {
const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, AC_CCP_VLC_BITS, 1);
if (ccp) {
if (ccp & 8)