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avcodec/msmpeg4_vc1_data: Avoid superfluous VLC structures

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Of all these VLCs here, only VLC.table was really used
after init, so use the ff_vlc_init_tables API
to get rid of them.
Also combine the ff_msmp4_dc_(luma|chroma)_vlcs as well
as the tables used to generate them to simplify the code.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-20 20:38:23 +02:00
parent ff886fc282
commit 7902c0df4c
6 changed files with 48 additions and 84 deletions
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61
libavcodec/msmpeg4_vc1_data.c
View File

@ -32,28 +32,25 @@
#include "libavutil/attributes.h"
#include "libavutil/thread.h"
VLC ff_msmp4_mb_i_vlc;
VLC ff_msmp4_dc_luma_vlc[2];
VLC ff_msmp4_dc_chroma_vlc[2];
VLCElem ff_msmp4_mb_i_vlc[536];
const VLCElem *ff_msmp4_dc_vlc[2][2];
static av_cold void msmp4_vc1_vlcs_init(void)
{
VLC_INIT_STATIC(&ff_msmp4_dc_luma_vlc[0], MSMP4_DC_VLC_BITS, 120,
&ff_table0_dc_lum[0][1], 8, 4,
&ff_table0_dc_lum[0][0], 8, 4, 1158);
VLC_INIT_STATIC(&ff_msmp4_dc_chroma_vlc[0], MSMP4_DC_VLC_BITS, 120,
&ff_table0_dc_chroma[0][1], 8, 4,
&ff_table0_dc_chroma[0][0], 8, 4, 1118);
VLC_INIT_STATIC(&ff_msmp4_dc_luma_vlc[1], MSMP4_DC_VLC_BITS, 120,
&ff_table1_dc_lum[0][1], 8, 4,
&ff_table1_dc_lum[0][0], 8, 4, 1476);
VLC_INIT_STATIC(&ff_msmp4_dc_chroma_vlc[1], MSMP4_DC_VLC_BITS, 120,
&ff_table1_dc_chroma[0][1], 8, 4,
&ff_table1_dc_chroma[0][0], 8, 4, 1216);
static VLCElem vlc_buf[1158 + 1118 + 1476 + 1216];
VLCInitState state = VLC_INIT_STATE(vlc_buf);
VLC_INIT_STATIC(&ff_msmp4_mb_i_vlc, MSMP4_MB_INTRA_VLC_BITS, 64,
&ff_msmp4_mb_i_table[0][1], 4, 2,
&ff_msmp4_mb_i_table[0][0], 4, 2, 536);
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
ff_msmp4_dc_vlc[i][j] =
ff_vlc_init_tables(&state, MSMP4_DC_VLC_BITS, 120,
&ff_msmp4_dc_tables[i][j][0][1], 8, 4,
&ff_msmp4_dc_tables[i][j][0][0], 8, 4, 0);
}
}
VLC_INIT_STATIC_TABLE(ff_msmp4_mb_i_vlc, MSMP4_MB_INTRA_VLC_BITS, 64,
&ff_msmp4_mb_i_table[0][1], 4, 2,
&ff_msmp4_mb_i_table[0][0], 4, 2, 0);
}
av_cold void ff_msmp4_vc1_vlcs_init_once(void)
@ -82,9 +79,11 @@ const uint16_t ff_msmp4_mb_i_table[64][2] = {
{ 0xd, 8 }, { 0x713, 13 }, { 0x1da, 10 }, { 0x169, 10 },
};
/* dc table 0 */
const uint32_t ff_table0_dc_lum[120][2] = {
const uint32_t ff_msmp4_dc_tables[2][2][120][2] = {
{
/* dc table 0 */
{
{ 0x1, 1 }, { 0x1, 2 }, { 0x1, 4 }, { 0x1, 5 },
{ 0x5, 5 }, { 0x7, 5 }, { 0x8, 6 }, { 0xc, 6 },
{ 0x0, 7 }, { 0x2, 7 }, { 0x12, 7 }, { 0x1a, 7 },
@ -115,9 +114,8 @@ const uint32_t ff_table0_dc_lum[120][2] = {
{ 0x60784, 24 }, { 0x60785, 24 }, { 0x60786, 24 }, { 0x60787, 24 },
{ 0x60788, 24 }, { 0x60789, 24 }, { 0x6078a, 24 }, { 0x6078b, 24 },
{ 0x6078c, 24 }, { 0x6078d, 24 }, { 0x6078e, 24 }, { 0x6078f, 24 },
};
const uint32_t ff_table0_dc_chroma[120][2] = {
},
{
{ 0x0, 2 }, { 0x1, 2 }, { 0x5, 3 }, { 0x9, 4 },
{ 0xd, 4 }, { 0x11, 5 }, { 0x1d, 5 }, { 0x1f, 5 },
{ 0x21, 6 }, { 0x31, 6 }, { 0x38, 6 }, { 0x33, 6 },
@ -148,11 +146,11 @@ const uint32_t ff_table0_dc_chroma[120][2] = {
{ 0x608884, 23 }, { 0x608885, 23 }, { 0x608886, 23 }, { 0x608887, 23 },
{ 0x608888, 23 }, { 0x608889, 23 }, { 0x60888a, 23 }, { 0x60888b, 23 },
{ 0x60888c, 23 }, { 0x60888d, 23 }, { 0x60888e, 23 }, { 0x60888f, 23 },
};
/* dc table 1 */
const uint32_t ff_table1_dc_lum[120][2] = {
}
},
{
/* dc table 1 */
{
{ 0x2, 2 }, { 0x3, 2 }, { 0x3, 3 }, { 0x2, 4 },
{ 0x5, 4 }, { 0x1, 5 }, { 0x3, 5 }, { 0x8, 5 },
{ 0x0, 6 }, { 0x5, 6 }, { 0xd, 6 }, { 0xf, 6 },
@ -183,9 +181,8 @@ const uint32_t ff_table1_dc_lum[120][2] = {
{ 0x1e695c, 26 }, { 0x1e695d, 26 }, { 0x1e695e, 26 }, { 0x1e695f, 26 },
{ 0x1e6960, 26 }, { 0x1e6961, 26 }, { 0x1e6962, 26 }, { 0x1e6963, 26 },
{ 0x1e6964, 26 }, { 0x1e6965, 26 }, { 0x1e6966, 26 }, { 0x1e6967, 26 },
};
const uint32_t ff_table1_dc_chroma[120][2] = {
},
{
{ 0x0, 2 }, { 0x1, 2 }, { 0x4, 3 }, { 0x7, 3 },
{ 0xb, 4 }, { 0xd, 4 }, { 0x15, 5 }, { 0x28, 6 },
{ 0x30, 6 }, { 0x32, 6 }, { 0x52, 7 }, { 0x62, 7 },
@ -216,6 +213,8 @@ const uint32_t ff_table1_dc_chroma[120][2] = {
{ 0x18f6484, 25 }, { 0x18f6485, 25 }, { 0x18f6486, 25 }, { 0x18f6487, 25 },
{ 0x18f6488, 25 }, { 0x18f6489, 25 }, { 0x18f648a, 25 }, { 0x18f648b, 25 },
{ 0x18f648c, 25 }, { 0x18f648d, 25 }, { 0x18f648e, 25 }, { 0x18f648f, 25 },
}
}
};
const uint8_t ff_wmv1_scantable[WMV1_SCANTABLE_COUNT][64] = {

10
libavcodec/msmpeg4_vc1_data.h
View File

@ -34,10 +34,9 @@ FF_VISIBILITY_PUSH_HIDDEN
void ff_msmp4_vc1_vlcs_init_once(void);
#define MSMP4_MB_INTRA_VLC_BITS 9
extern VLC ff_msmp4_mb_i_vlc;
extern VLCElem ff_msmp4_mb_i_vlc[];
#define MSMP4_DC_VLC_BITS 9
extern VLC ff_msmp4_dc_luma_vlc[2];
extern VLC ff_msmp4_dc_chroma_vlc[2];
extern const VLCElem *ff_msmp4_dc_vlc[2 /* dc_table_index */][2 /* 0: luma, 1: chroma */];
/* intra picture macroblock coded block pattern */
extern const uint16_t ff_msmp4_mb_i_table[64][2];
@ -46,10 +45,7 @@ extern const uint16_t ff_msmp4_mb_i_table[64][2];
extern const uint8_t ff_wmv1_scantable[WMV1_SCANTABLE_COUNT][64];
extern const uint32_t ff_table0_dc_lum[120][2];
extern const uint32_t ff_table1_dc_lum[120][2];
extern const uint32_t ff_table0_dc_chroma[120][2];
extern const uint32_t ff_table1_dc_chroma[120][2];
extern const uint32_t ff_msmp4_dc_tables[2 /* dc_table_index */][2 /* 0: luma, 1: chroma */][120][2];
FF_VISIBILITY_POP_HIDDEN
#endif /* AVCODEC_MSMPEG4_VC1_DATA_H */

13
libavcodec/msmpeg4dec.c
View File

@ -237,7 +237,7 @@ static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64])
cbp = code & 0x3f;
} else {
s->mb_intra = 1;
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MSMP4_MB_INTRA_VLC_BITS, 2);
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc, MSMP4_MB_INTRA_VLC_BITS, 2);
/* predict coded block pattern */
cbp = 0;
for(i=0;i<6;i++) {
@ -582,14 +582,9 @@ static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
return -1;
}
level-=256;
}else{ //FIXME optimize use unified tables & index
if (n < 4) {
level = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
} else {
level = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
}
} else {
level = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
MSMP4_DC_VLC_BITS, 3);
if (level == DC_MAX) {
level = get_bits(&s->gb, 8);

15
libavcodec/msmpeg4enc.c
View File

@ -544,19 +544,8 @@ static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr
if (code > DC_MAX)
code = DC_MAX;
if (s->dc_table_index == 0) {
if (n < 4) {
put_bits(&s->pb, ff_table0_dc_lum[code][1], ff_table0_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table0_dc_chroma[code][1], ff_table0_dc_chroma[code][0]);
}
} else {
if (n < 4) {
put_bits(&s->pb, ff_table1_dc_lum[code][1], ff_table1_dc_lum[code][0]);
} else {
put_bits(&s->pb, ff_table1_dc_chroma[code][1], ff_table1_dc_chroma[code][0]);
}
}
put_bits(&s->pb, ff_msmp4_dc_tables[s->dc_table_index][n >= 4][code][1],
ff_msmp4_dc_tables[s->dc_table_index][n >= 4][code][0]);
if (code == DC_MAX)
put_bits(&s->pb, 8, level);

31
libavcodec/vc1_block.c
View File

@ -592,13 +592,8 @@ static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
int dcdiff, scale;
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
}
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
MSMP4_DC_VLC_BITS, 3);
if (dcdiff) {
const int m = (v->pq == 1 || v->pq == 2) ? 3 - v->pq : 0;
if (dcdiff == 119 /* ESC index value */) {
@ -738,13 +733,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
int quant = FFABS(mquant);
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
}
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
MSMP4_DC_VLC_BITS, 3);
if (dcdiff) {
const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
if (dcdiff == 119 /* ESC index value */) {
@ -940,13 +930,8 @@ static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
s->c_dc_scale = s->c_dc_scale_table[quant];
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table,
MSMP4_DC_VLC_BITS, 3);
}
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_vlc[s->dc_table_index][n >= 4],
MSMP4_DC_VLC_BITS, 3);
if (dcdiff) {
const int m = (quant == 1 || quant == 2) ? 3 - quant : 0;
if (dcdiff == 119 /* ESC index value */) {
@ -2591,7 +2576,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
}
// do actual MB decoding and displaying
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table,
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc,
MSMP4_MB_INTRA_VLC_BITS, 2);
v->s.ac_pred = get_bits1(&v->s.gb);
@ -2727,7 +2712,7 @@ static int vc1_decode_i_blocks_adv(VC1Context *v)
return 0;
}
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table,
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc,
MSMP4_MB_INTRA_VLC_BITS, 2);
if (v->acpred_is_raw)
v->s.ac_pred = get_bits1(&v->s.gb);

2
libavcodec/wmv2dec.c
View File

@ -477,7 +477,7 @@ static int wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
s->mb_intra = 1;
if (get_bits_left(&s->gb) <= 0)
return AVERROR_INVALIDDATA;
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table,
code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc,
MSMP4_MB_INTRA_VLC_BITS, 2);
/* predict coded block pattern */
cbp = 0;