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avcodec/msmpeg4: Inline number of motion vectors

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Both motion vector tables have the same number of elements, hence one
can inline said number and remove the field containing the number of
elements from the structure.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2021-01-26 22:19:19 +01:00
parent fbb81ea2c6
commit d8b2fae3c7
4 changed files with 9 additions and 11 deletions
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6
libavcodec/msmpeg4data.c
View File

@ -1771,13 +1771,11 @@ static const uint8_t table1_mvy[1099] = {
};
MVTable ff_mv_tables[2] = {
{ 1099,
table0_mv_code,
{ table0_mv_code,
table0_mv_bits,
table0_mvx,
table0_mvy, },
{ 1099,
table1_mv_code,
{ table1_mv_code,
table1_mv_bits,
table1_mvx,
table1_mvy, }

2
libavcodec/msmpeg4data.h
View File

@ -37,7 +37,6 @@
/* motion vector table */
typedef struct MVTable {
int n;
const uint16_t *table_mv_code;
const uint8_t *table_mv_bits;
const uint8_t *table_mvx;
@ -69,6 +68,7 @@ extern const uint8_t ff_wmv1_y_dc_scale_table[32];
extern const uint8_t ff_wmv1_c_dc_scale_table[32];
extern const uint8_t ff_old_ff_y_dc_scale_table[32];
#define MSMPEG4_MV_TABLES_NB_ELEMS 1099
extern MVTable ff_mv_tables[2];
extern const uint8_t ff_v2_mb_type[8][2];

6
libavcodec/msmpeg4dec.c
View File

@ -321,11 +321,11 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
memcpy(ff_rl_table[5].rl_vlc, ff_h263_rl_inter.rl_vlc, sizeof(ff_rl_table[5].rl_vlc));
mv = &ff_mv_tables[0];
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, MSMPEG4_MV_TABLES_NB_ELEMS + 1,
mv->table_mv_bits, 1, 1,
mv->table_mv_code, 2, 2, 3714);
mv = &ff_mv_tables[1];
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, mv->n + 1,
INIT_VLC_STATIC(&mv->vlc, MV_VLC_BITS, MSMPEG4_MV_TABLES_NB_ELEMS + 1,
mv->table_mv_bits, 1, 1,
mv->table_mv_code, 2, 2, 2694);
@ -836,7 +836,7 @@ void ff_msmpeg4_decode_motion(MpegEncContext *s, int *mx_ptr, int *my_ptr)
mv = &ff_mv_tables[s->mv_table_index];
code = get_vlc2(&s->gb, mv->vlc.table, MV_VLC_BITS, 2);
if (code == mv->n) {
if (code == MSMPEG4_MV_TABLES_NB_ELEMS) {
mx = get_bits(&s->gb, 6);
my = get_bits(&s->gb, 6);
} else {

6
libavcodec/msmpeg4enc.c
View File

@ -56,9 +56,9 @@ static av_cold int init_mv_table(MVTable *tab)
/* mark all entries as not used */
for(i=0;i<4096;i++)
tab->table_mv_index[i] = tab->n;
tab->table_mv_index[i] = MSMPEG4_MV_TABLES_NB_ELEMS;
for(i=0;i<tab->n;i++) {
for (i = 0; i < MSMPEG4_MV_TABLES_NB_ELEMS; i++) {
x = tab->table_mvx[i];
y = tab->table_mvy[i];
tab->table_mv_index[(x << 6) | y] = i;
@ -320,7 +320,7 @@ void ff_msmpeg4_encode_motion(MpegEncContext * s,
put_bits(&s->pb,
mv->table_mv_bits[code],
mv->table_mv_code[code]);
if (code == mv->n) {
if (code == MSMPEG4_MV_TABLES_NB_ELEMS) {
/* escape : code literally */
put_bits(&s->pb, 6, mx);
put_bits(&s->pb, 6, my);