LAV
/
FFmpeg
1
0
Fork 0
Code

avcodec/vc1: Avoid superfluous VLC structures 

For all VLCs here, the number of bits of the VLC is
write-only, because it is hardcoded at the call site.
Therefore one can replace these VLC structures with
the only thing that is actually used: The pointer
to the VLCElem table. And in some cases one can even
avoid this.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-24 17:14:07 +02:00
parent fd4cb6ebee
commit e5dcde620d
6 changed files with 179 additions and 209 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
libavcodec/vc1.c
View File

@ -104,7 +104,7 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
height = v->s.mb_height >> v->field_mode;
stride = v->s.mb_stride;
invert = get_bits1(gb);
imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
imode = get_vlc2(gb, ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 1);
*raw_flag = 0;
switch (imode) {
@ -126,7 +126,7 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
y = offset = 0;
// decode bitplane as one long line
for (; y < height * width; y += 2) {
code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
code = get_vlc2(gb, ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 1);
*planep++ = code & 1;
offset++;
if (offset == width) {
@ -146,7 +146,7 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
if (!(height % 3) && (width % 3)) { // use 2x3 decoding
for (y = 0; y < height; y += 3) {
for (x = width & 1; x < width; x += 2) {
code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
code = get_vlc2(gb, ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 2);
if (code < 0) {
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
@ -166,7 +166,7 @@ static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
planep += (height & 1) * stride;
for (y = height & 1; y < height; y += 2) {
for (x = width % 3; x < width; x += 3) {
code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
code = get_vlc2(gb, ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 2);
if (code < 0) {
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
@ -765,7 +765,7 @@ int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
/* Hopefully this is correct for P-frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbptab = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[v->cbptab];
v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
if (v->dquant) {
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
@ -804,7 +804,7 @@ int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
v->s.mv_table_index = get_bits(gb, 2);
v->cbptab = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[v->cbptab];
v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
if (v->dquant) {
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
@ -1061,19 +1061,19 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->mbmodetab = get_bits(gb, 2);
if (v->fourmvswitch)
v->mbmode_vlc = &ff_vc1_intfr_4mv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_intfr_4mv_mbmode_vlc[v->mbmodetab];
else
v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
v->imvtab = get_bits(gb, 2);
v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[v->imvtab];
v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
// interlaced p-picture cbpcy range is [1, 63]
v->icbptab = get_bits(gb, 3);
v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[v->icbptab];
v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
v->twomvbptab = get_bits(gb, 2);
v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
if (v->fourmvswitch) {
v->fourmvbptab = get_bits(gb, 2);
v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
}
}
}
@ -1158,7 +1158,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
/* Hopefully this is correct for P-frames */
v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
v->cbptab = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[v->cbptab];
v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
} else if (v->fcm == ILACE_FRAME) { // frame interlaced
v->qs_last = v->s.quarter_sample;
v->s.quarter_sample = 1;
@ -1167,18 +1167,18 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->mbmodetab = get_bits(gb, 3);
v->imvtab = get_bits(gb, 2 + v->numref);
if (!v->numref)
v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[v->imvtab];
v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
else
v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[v->imvtab];
v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
v->icbptab = get_bits(gb, 3);
v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[v->icbptab];
v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV) || v->mv_mode == MV_PMODE_MIXED_MV) {
v->fourmvbptab = get_bits(gb, 2);
v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
} else {
v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
}
}
if (v->dquant) {
@ -1234,16 +1234,16 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->mbmodetab = get_bits(gb, 3);
if (v->mv_mode == MV_PMODE_MIXED_MV)
v->mbmode_vlc = &ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_if_mmv_mbmode_vlc[v->mbmodetab];
else
v->mbmode_vlc = &ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_if_1mv_mbmode_vlc[v->mbmodetab];
v->imvtab = get_bits(gb, 3);
v->imv_vlc = &ff_vc1_2ref_mvdata_vlc[v->imvtab];
v->imv_vlc = ff_vc1_2ref_mvdata_vlc[v->imvtab];
v->icbptab = get_bits(gb, 3);
v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[v->icbptab];
v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
if (v->mv_mode == MV_PMODE_MIXED_MV) {
v->fourmvbptab = get_bits(gb, 2);
v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
}
v->numref = 1; // interlaced field B pictures are always 2-ref
} else if (v->fcm == ILACE_FRAME) {
@ -1268,16 +1268,16 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->mbmodetab = get_bits(gb, 2);
v->mbmode_vlc = &ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
v->mbmode_vlc = ff_vc1_intfr_non4mv_mbmode_vlc[v->mbmodetab];
v->imvtab = get_bits(gb, 2);
v->imv_vlc = &ff_vc1_1ref_mvdata_vlc[v->imvtab];
v->imv_vlc = ff_vc1_1ref_mvdata_vlc[v->imvtab];
// interlaced p/b-picture cbpcy range is [1, 63]
v->icbptab = get_bits(gb, 3);
v->cbpcy_vlc = &ff_vc1_icbpcy_vlc[v->icbptab];
v->cbpcy_vlc = ff_vc1_icbpcy_vlc[v->icbptab];
v->twomvbptab = get_bits(gb, 2);
v->twomvbp_vlc = &ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
v->twomvbp_vlc = ff_vc1_2mv_block_pattern_vlc[v->twomvbptab];
v->fourmvbptab = get_bits(gb, 2);
v->fourmvbp_vlc = &ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
v->fourmvbp_vlc = ff_vc1_4mv_block_pattern_vlc[v->fourmvbptab];
} else {
v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
v->qs_last = v->s.quarter_sample;
@ -1295,7 +1295,7 @@ int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->s.mv_table_index = get_bits(gb, 2);
v->cbptab = get_bits(gb, 2);
v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[v->cbptab];
v->cbpcy_vlc = ff_vc1_cbpcy_p_vlc[v->cbptab];
}
if (v->dquant) {

10
libavcodec/vc1.h
View File

@ -279,7 +279,7 @@ typedef struct VC1Context{
*/
uint8_t mvrange; ///< Extended MV range flag
uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
VLC *cbpcy_vlc; ///< CBPCY VLC table
const VLCElem *cbpcy_vlc; ///< CBPCY VLC table
int tt_index; ///< Index for Transform Type tables (to decode TTMB)
uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV)
uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs
@ -334,10 +334,10 @@ typedef struct VC1Context{
int intcomp;
uint8_t lumscale2; ///< for interlaced field P picture
uint8_t lumshift2;
VLC* mbmode_vlc;
VLC* imv_vlc;
VLC* twomvbp_vlc;
VLC* fourmvbp_vlc;
const VLCElem *mbmode_vlc;
const VLCElem *imv_vlc;
const VLCElem *twomvbp_vlc;
const VLCElem *fourmvbp_vlc;
uint8_t twomvbp;
uint8_t fourmvbp;
uint8_t* fieldtx_plane;

74
libavcodec/vc1_block.c
View File

@ -227,7 +227,7 @@ static void vc1_put_blocks_clamped(VC1Context *v, int put_signed)
* @param _dmv_y Vertical differential for decoded MV
*/
#define GET_MVDATA(_dmv_x, _dmv_y) \
index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index].table, \
index = 1 + get_vlc2(gb, ff_vc1_mv_diff_vlc[s->mv_table_index], \
VC1_MV_DIFF_VLC_BITS, 2); \
if (index > 36) { \
mb_has_coeffs = 1; \
@ -282,7 +282,7 @@ static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
}
extend_x = v->dmvrange & 1;
extend_y = (v->dmvrange >> 1) & 1;
index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
index = get_vlc2(gb, v->imv_vlc, bits, 3);
if (index == esc) {
*dmv_x = get_bits(gb, v->k_x);
*dmv_y = get_bits(gb, v->k_y);
@ -519,7 +519,7 @@ static int vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
GetBitContext *gb = &v->s.gb;
int index, run, level, lst, sign;
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset], AC_VLC_BITS, 3);
if (index < 0)
return index;
if (index != ff_vc1_ac_sizes[codingset] - 1) {
@ -530,7 +530,7 @@ static int vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
} else {
int escape = decode210(gb);
if (escape != 2) {
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset], AC_VLC_BITS, 3);
if (index >= ff_vc1_ac_sizes[codingset] - 1U)
return AVERROR_INVALIDDATA;
run = vc1_index_decode_table[codingset][index][0];
@ -1124,10 +1124,10 @@ static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
s->bdsp.clear_block(block);
if (ttmb == -1) {
ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
ttblk = ff_vc1_ttblk_to_tt[v->tt_index][get_vlc2(gb, ff_vc1_ttblk_vlc[v->tt_index], VC1_TTBLK_VLC_BITS, 1)];
}
if (ttblk == TT_4X4) {
subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index], VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
}
if ((ttblk != TT_8X8 && ttblk != TT_4X4)
&& ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
@ -1328,7 +1328,7 @@ static int vc1_decode_p_mb(VC1Context *v)
} else if (mb_has_coeffs) {
if (s->mb_intra)
s->ac_pred = get_bits1(gb);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
GET_MQUANT();
} else {
mquant = v->pq;
@ -1337,7 +1337,7 @@ static int vc1_decode_p_mb(VC1Context *v)
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table,
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index],
VC1_TTMB_VLC_BITS, 2);
if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
dst_idx = 0;
@ -1393,7 +1393,7 @@ static int vc1_decode_p_mb(VC1Context *v)
int intra_count = 0, coded_inter = 0;
int is_intra[6], is_coded[6];
/* Get CBPCY */
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
for (i = 0; i < 6; i++) {
val = ((cbp >> (5 - i)) & 1);
s->dc_val[0][s->block_index[i]] = 0;
@ -1445,7 +1445,7 @@ static int vc1_decode_p_mb(VC1Context *v)
s->ac_pred = 0;
}
if (!v->ttmbf && coded_inter)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
for (i = 0; i < 6; i++) {
dst_idx += i >> 2;
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
@ -1539,9 +1539,9 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
skipped = v->s.mbskip_table[mb_pos];
if (!skipped) {
if (v->fourmvswitch)
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_INTFR_4MV_MBMODE_VLC_BITS, 2); // try getting this done
else
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
/* store the motion vector type in a flag (useful later) */
case MV_PMODE_INTFR_4MV:
@ -1583,7 +1583,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
mb_has_coeffs = get_bits1(gb);
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
@ -1617,13 +1617,13 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
} else { // inter MB
mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
v->twomvbp = get_vlc2(gb, v->twomvbp_vlc, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
} else {
if ((ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV)
|| (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_4MV_FIELD)) {
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
}
}
s->mb_intra = v->is_intra[s->mb_x] = 0;
@ -1672,7 +1672,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
GET_MQUANT(); // p. 227
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && cbp)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
@ -1742,7 +1742,7 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
mquant = v->pq; /* Lossy initialization */
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_IF_MBMODE_VLC_BITS, 2);
if (idx_mbmode <= 1) { // intra MB
v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
s->mb_intra = 1;
@ -1757,7 +1757,7 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
mb_has_coeffs = idx_mbmode & 1;
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_ICBPCY_VLC_BITS, 2);
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
@ -1792,7 +1792,7 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
ff_vc1_mc_1mv(v, 0);
mb_has_coeffs = !(idx_mbmode & 2);
} else { // 4-MV
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
for (i = 0; i < 4; i++) {
dmv_x = dmv_y = pred_flag = 0;
if (v->fourmvbp & (8 >> i))
@ -1804,13 +1804,13 @@ static int vc1_decode_p_mb_intfi(VC1Context *v)
mb_has_coeffs = idx_mbmode & 1;
}
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
if (cbp) {
GET_MQUANT();
}
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && cbp) {
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
}
dst_idx = 0;
for (i = 0; i < 6; i++) {
@ -1914,12 +1914,12 @@ static int vc1_decode_b_mb(VC1Context *v)
return 0;
}
if (direct) {
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
GET_MQUANT();
s->mb_intra = 0;
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
@ -1952,11 +1952,11 @@ static int vc1_decode_b_mb(VC1Context *v)
}
if (s->mb_intra)
s->ac_pred = get_bits1(gb);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
}
}
dst_idx = 0;
@ -2025,7 +2025,7 @@ static int vc1_decode_b_mb_intfi(VC1Context *v)
mquant = v->pq; /* Lossy initialization */
s->mb_intra = 0;
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_IF_MBMODE_VLC_BITS, 2);
idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_IF_MBMODE_VLC_BITS, 2);
if (idx_mbmode <= 1) { // intra MB
v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
s->mb_intra = 1;
@ -2040,7 +2040,7 @@ static int vc1_decode_b_mb_intfi(VC1Context *v)
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
mb_has_coeffs = idx_mbmode & 1;
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_ICBPCY_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_ICBPCY_VLC_BITS, 2);
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
@ -2118,7 +2118,7 @@ static int vc1_decode_b_mb_intfi(VC1Context *v)
if (fwd)
bmvtype = BMV_TYPE_FORWARD;
v->bmvtype = bmvtype;
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
for (i = 0; i < 4; i++) {
dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
@ -2134,13 +2134,13 @@ static int vc1_decode_b_mb_intfi(VC1Context *v)
mb_has_coeffs = idx_mbmode & 1;
}
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
if (cbp) {
GET_MQUANT();
}
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && cbp) {
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
}
dst_idx = 0;
for (i = 0; i < 6; i++) {
@ -2200,7 +2200,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
skipped = v->s.mbskip_table[mb_pos];
if (!skipped) {
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
idx_mbmode = get_vlc2(gb, v->mbmode_vlc, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
twomv = 1;
v->blk_mv_type[s->block_index[0]] = 1;
@ -2228,7 +2228,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
fieldtx = v->fieldtx_plane[mb_pos] = get_bits1(gb);
mb_has_coeffs = get_bits1(gb);
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
@ -2323,12 +2323,12 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
if (!skipped) { // inter MB
mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc, VC1_CBPCY_P_VLC_BITS, 2);
if (!direct) {
if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
} else if (bmvtype == BMV_TYPE_INTERPOLATED || twomv) {
v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
v->twomvbp = get_vlc2(gb, v->twomvbp_vlc, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 1);
}
}
@ -2438,7 +2438,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
GET_MQUANT(); // p. 227
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && cbp)
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);
ttmb = get_vlc2(gb, ff_vc1_ttmb_vlc[v->tt_index], VC1_TTMB_VLC_BITS, 2);
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;

36
libavcodec/vc1data.c
View File

@ -102,26 +102,26 @@ const uint8_t ff_vc1_pquant_table[3][32] = {
* @todo TODO move this into the context
*/
//@{
VLC ff_vc1_imode_vlc;
VLC ff_vc1_norm2_vlc;
VLC ff_vc1_norm6_vlc;
VLCElem ff_vc1_imode_vlc[1 << VC1_IMODE_VLC_BITS];
VLCElem ff_vc1_norm2_vlc[1 << VC1_NORM2_VLC_BITS];
VLCElem ff_vc1_norm6_vlc[556];
/* Could be optimized, one table only needs 8 bits */
VLC ff_vc1_ttmb_vlc[3];
VLC ff_vc1_mv_diff_vlc[4];
VLC ff_vc1_cbpcy_p_vlc[4];
VLC ff_vc1_icbpcy_vlc[8];
VLC ff_vc1_4mv_block_pattern_vlc[4];
VLC ff_vc1_2mv_block_pattern_vlc[4];
VLC ff_vc1_ttblk_vlc[3];
VLC ff_vc1_subblkpat_vlc[3];
VLC ff_vc1_intfr_4mv_mbmode_vlc[4];
VLC ff_vc1_intfr_non4mv_mbmode_vlc[4];
VLC ff_vc1_if_mmv_mbmode_vlc[8];
VLC ff_vc1_if_1mv_mbmode_vlc[8];
VLC ff_vc1_1ref_mvdata_vlc[4];
VLC ff_vc1_2ref_mvdata_vlc[8];
const VLCElem *ff_vc1_ttmb_vlc[3];
const VLCElem *ff_vc1_mv_diff_vlc[4];
const VLCElem *ff_vc1_cbpcy_p_vlc[4];
const VLCElem *ff_vc1_icbpcy_vlc[8];
const VLCElem *ff_vc1_4mv_block_pattern_vlc[4];
const VLCElem *ff_vc1_2mv_block_pattern_vlc[4];
const VLCElem *ff_vc1_ttblk_vlc[3];
const VLCElem *ff_vc1_subblkpat_vlc[3];
const VLCElem *ff_vc1_intfr_4mv_mbmode_vlc[4];
const VLCElem *ff_vc1_intfr_non4mv_mbmode_vlc[4];
const VLCElem *ff_vc1_if_mmv_mbmode_vlc[8];
const VLCElem *ff_vc1_if_1mv_mbmode_vlc[8];
const VLCElem *ff_vc1_1ref_mvdata_vlc[4];
const VLCElem *ff_vc1_2ref_mvdata_vlc[8];
VLC ff_vc1_ac_coeff_table[8];
const VLCElem *ff_vc1_ac_coeff_table[8];
//@}

36
libavcodec/vc1data.h
View File

@ -56,42 +56,42 @@ extern const uint8_t ff_vc1_mbmode_intfrp[2][15][4];
*/
//@{
#define VC1_IMODE_VLC_BITS 4
extern VLC ff_vc1_imode_vlc;
extern VLCElem ff_vc1_imode_vlc[1 << VC1_IMODE_VLC_BITS];
#define VC1_NORM2_VLC_BITS 3
extern VLC ff_vc1_norm2_vlc;
extern VLCElem ff_vc1_norm2_vlc[1 << VC1_NORM2_VLC_BITS];
#define VC1_NORM6_VLC_BITS 9
extern VLC ff_vc1_norm6_vlc;
extern VLCElem ff_vc1_norm6_vlc[556];
/* Could be optimized, one table only needs 8 bits */
#define VC1_TTMB_VLC_BITS 9 //12
extern VLC ff_vc1_ttmb_vlc[3];
extern const VLCElem *ff_vc1_ttmb_vlc[3];
#define VC1_MV_DIFF_VLC_BITS 9 //15
extern VLC ff_vc1_mv_diff_vlc[4];
extern const VLCElem *ff_vc1_mv_diff_vlc[4];
#define VC1_CBPCY_P_VLC_BITS 9 //14
extern VLC ff_vc1_cbpcy_p_vlc[4];
extern const VLCElem *ff_vc1_cbpcy_p_vlc[4];
#define VC1_ICBPCY_VLC_BITS 9
extern VLC ff_vc1_icbpcy_vlc[8];
extern const VLCElem *ff_vc1_icbpcy_vlc[8];
#define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
extern VLC ff_vc1_4mv_block_pattern_vlc[4];
extern const VLCElem *ff_vc1_4mv_block_pattern_vlc[4];
#define VC1_2MV_BLOCK_PATTERN_VLC_BITS 3
extern VLC ff_vc1_2mv_block_pattern_vlc[4];
extern const VLCElem *ff_vc1_2mv_block_pattern_vlc[4];
#define VC1_TTBLK_VLC_BITS 5
extern VLC ff_vc1_ttblk_vlc[3];
extern const VLCElem *ff_vc1_ttblk_vlc[3];
#define VC1_SUBBLKPAT_VLC_BITS 6
extern VLC ff_vc1_subblkpat_vlc[3];
extern const VLCElem *ff_vc1_subblkpat_vlc[3];
#define VC1_INTFR_4MV_MBMODE_VLC_BITS 9
extern VLC ff_vc1_intfr_4mv_mbmode_vlc[4];
extern const VLCElem *ff_vc1_intfr_4mv_mbmode_vlc[4];
#define VC1_INTFR_NON4MV_MBMODE_VLC_BITS 6
extern VLC ff_vc1_intfr_non4mv_mbmode_vlc[4];
extern const VLCElem *ff_vc1_intfr_non4mv_mbmode_vlc[4];
#define VC1_IF_MMV_MBMODE_VLC_BITS 5
extern VLC ff_vc1_if_mmv_mbmode_vlc[8];
extern const VLCElem *ff_vc1_if_mmv_mbmode_vlc[8];
#define VC1_IF_1MV_MBMODE_VLC_BITS 5
extern VLC ff_vc1_if_1mv_mbmode_vlc[8];
extern const VLCElem *ff_vc1_if_1mv_mbmode_vlc[8];
#define VC1_1REF_MVDATA_VLC_BITS 9
extern VLC ff_vc1_1ref_mvdata_vlc[4];
extern const VLCElem *ff_vc1_1ref_mvdata_vlc[4];
#define VC1_2REF_MVDATA_VLC_BITS 9
extern VLC ff_vc1_2ref_mvdata_vlc[8];
extern const VLCElem *ff_vc1_2ref_mvdata_vlc[8];
extern VLC ff_vc1_ac_coeff_table[8];
extern const VLCElem *ff_vc1_ac_coeff_table[8];
#define VC1_IF_MBMODE_VLC_BITS 5 // as a placeholder for VC1_IF_MMV_MBMODE_VLC_BITS
// or VC1_IF_1MV_MBMODE_VLC_BITS since they are the same

172
libavcodec/vc1dec.c
View File

@ -469,122 +469,92 @@ av_cold void ff_vc1_init_transposed_scantables(VC1Context *v)
v->top_blk_sh = 3;
}
static const uint16_t vlc_offs[] = {
0, 520, 552, 616, 1128, 1160, 1224, 1740, 1772, 1836, 1900, 2436,
2986, 3050, 3610, 4154, 4218, 4746, 5326, 5390, 5902, 6554, 7658, 8342,
9304, 9988, 10630, 11234, 12174, 13006, 13560, 14232, 14786, 15432, 16350, 17522,
20372, 21818, 22330, 22394, 23166, 23678, 23742, 24820, 25332, 25396, 26460, 26980,
27048, 27592, 27600, 27608, 27616, 27624, 28224, 28258, 28290, 28802, 28834, 28866,
29378, 29412, 29444, 29960, 29994, 30026, 30538, 30572, 30604, 31120, 31154, 31186,
31714, 31746, 31778, 32306, 32340, 32372
};
static av_cold void vc1_init_static(void)
{
static VLCElem vlc_table[32372];
VLCInitState state = VLC_INIT_STATE(vlc_table);
VLC_INIT_STATIC(&ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
vc1_norm2_bits, 1, 1,
vc1_norm2_codes, 1, 1, 1 << VC1_NORM2_VLC_BITS);
VLC_INIT_STATIC(&ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
vc1_norm6_bits, 1, 1,
vc1_norm6_codes, 2, 2, 556);
VLC_INIT_STATIC(&ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
vc1_imode_bits, 1, 1,
vc1_imode_codes, 1, 1, 1 << VC1_IMODE_VLC_BITS);
VLC_INIT_STATIC_TABLE(ff_vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
vc1_norm2_bits, 1, 1,
vc1_norm2_codes, 1, 1, 0);
VLC_INIT_STATIC_TABLE(ff_vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
vc1_norm6_bits, 1, 1,
vc1_norm6_codes, 2, 2, 0);
VLC_INIT_STATIC_TABLE(ff_vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
vc1_imode_bits, 1, 1,
vc1_imode_codes, 1, 1, 0);
for (int i = 0; i < 3; i++) {
ff_vc1_ttmb_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 0]];
ff_vc1_ttmb_vlc[i].table_allocated = vlc_offs[i * 3 + 1] - vlc_offs[i * 3 + 0];
vlc_init(&ff_vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
vc1_ttmb_bits[i], 1, 1,
vc1_ttmb_codes[i], 2, 2, VLC_INIT_USE_STATIC);
ff_vc1_ttblk_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 1]];
ff_vc1_ttblk_vlc[i].table_allocated = vlc_offs[i * 3 + 2] - vlc_offs[i * 3 + 1];
vlc_init(&ff_vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
vc1_ttblk_bits[i], 1, 1,
vc1_ttblk_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_subblkpat_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 2]];
ff_vc1_subblkpat_vlc[i].table_allocated = vlc_offs[i * 3 + 3] - vlc_offs[i * 3 + 2];
vlc_init(&ff_vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
vc1_subblkpat_bits[i], 1, 1,
vc1_subblkpat_codes[i], 1, 1, VLC_INIT_USE_STATIC);
}
for (int i = 0; i < 4; i++) {
ff_vc1_4mv_block_pattern_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 9]];
ff_vc1_4mv_block_pattern_vlc[i].table_allocated = vlc_offs[i * 3 + 10] - vlc_offs[i * 3 + 9];
vlc_init(&ff_vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
vc1_4mv_block_pattern_bits[i], 1, 1,
vc1_4mv_block_pattern_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_cbpcy_p_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 10]];
ff_vc1_cbpcy_p_vlc[i].table_allocated = vlc_offs[i * 3 + 11] - vlc_offs[i * 3 + 10];
vlc_init(&ff_vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
vc1_cbpcy_p_bits[i], 1, 1,
vc1_cbpcy_p_codes[i], 2, 2, VLC_INIT_USE_STATIC);
ff_vc1_mv_diff_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 11]];
ff_vc1_mv_diff_vlc[i].table_allocated = vlc_offs[i * 3 + 12] - vlc_offs[i * 3 + 11];
vlc_init(&ff_vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
vc1_mv_diff_bits[i], 1, 1,
vc1_mv_diff_codes[i], 2, 2, VLC_INIT_USE_STATIC);
}
for (int i = 0; i < 8; i++) {
ff_vc1_ac_coeff_table[i].table = &vlc_table[vlc_offs[i * 2 + 21]];
ff_vc1_ac_coeff_table[i].table_allocated = vlc_offs[i * 2 + 22] - vlc_offs[i * 2 + 21];
vlc_init(&ff_vc1_ac_coeff_table[i], AC_VLC_BITS, ff_vc1_ac_sizes[i],
&vc1_ac_tables[i][0][1], 8, 4,
&vc1_ac_tables[i][0][0], 8, 4, VLC_INIT_USE_STATIC);
/* initialize interlaced MVDATA tables (2-Ref) */
ff_vc1_2ref_mvdata_vlc[i].table = &vlc_table[vlc_offs[i * 2 + 22]];
ff_vc1_2ref_mvdata_vlc[i].table_allocated = vlc_offs[i * 2 + 23] - vlc_offs[i * 2 + 22];
vlc_init(&ff_vc1_2ref_mvdata_vlc[i], VC1_2REF_MVDATA_VLC_BITS, 126,
vc1_2ref_mvdata_bits[i], 1, 1,
vc1_2ref_mvdata_codes[i], 4, 4, VLC_INIT_USE_STATIC);
ff_vc1_ttmb_vlc[i] =
ff_vlc_init_tables(&state, VC1_TTMB_VLC_BITS, 16,
vc1_ttmb_bits[i], 1, 1,
vc1_ttmb_codes[i], 2, 2, 0);
ff_vc1_ttblk_vlc[i] =
ff_vlc_init_tables(&state, VC1_TTBLK_VLC_BITS, 8,
vc1_ttblk_bits[i], 1, 1,
vc1_ttblk_codes[i], 1, 1, 0);
ff_vc1_subblkpat_vlc[i] =
ff_vlc_init_tables(&state, VC1_SUBBLKPAT_VLC_BITS, 15,
vc1_subblkpat_bits[i], 1, 1,
vc1_subblkpat_codes[i], 1, 1, 0);
}
for (int i = 0; i < 4; i++) {
ff_vc1_4mv_block_pattern_vlc[i] =
ff_vlc_init_tables(&state, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
vc1_4mv_block_pattern_bits[i], 1, 1,
vc1_4mv_block_pattern_codes[i], 1, 1, 0);
ff_vc1_cbpcy_p_vlc[i] =
ff_vlc_init_tables(&state, VC1_CBPCY_P_VLC_BITS, 64,
vc1_cbpcy_p_bits[i], 1, 1,
vc1_cbpcy_p_codes[i], 2, 2, 0);
ff_vc1_mv_diff_vlc[i] =
ff_vlc_init_tables(&state, VC1_MV_DIFF_VLC_BITS, 73,
vc1_mv_diff_bits[i], 1, 1,
vc1_mv_diff_codes[i], 2, 2, 0);
/* initialize 4MV MBMODE VLC tables for interlaced frame P picture */
ff_vc1_intfr_4mv_mbmode_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 37]];
ff_vc1_intfr_4mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 38] - vlc_offs[i * 3 + 37];
vlc_init(&ff_vc1_intfr_4mv_mbmode_vlc[i], VC1_INTFR_4MV_MBMODE_VLC_BITS, 15,
vc1_intfr_4mv_mbmode_bits[i], 1, 1,
vc1_intfr_4mv_mbmode_codes[i], 2, 2, VLC_INIT_USE_STATIC);
ff_vc1_intfr_4mv_mbmode_vlc[i] =
ff_vlc_init_tables(&state, VC1_INTFR_4MV_MBMODE_VLC_BITS, 15,
vc1_intfr_4mv_mbmode_bits[i], 1, 1,
vc1_intfr_4mv_mbmode_codes[i], 2, 2, 0);
/* initialize NON-4MV MBMODE VLC tables for the same */
ff_vc1_intfr_non4mv_mbmode_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 38]];
ff_vc1_intfr_non4mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 39] - vlc_offs[i * 3 + 38];
vlc_init(&ff_vc1_intfr_non4mv_mbmode_vlc[i], VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 9,
vc1_intfr_non4mv_mbmode_bits[i], 1, 1,
vc1_intfr_non4mv_mbmode_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_intfr_non4mv_mbmode_vlc[i] =
ff_vlc_init_tables(&state, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 9,
vc1_intfr_non4mv_mbmode_bits[i], 1, 1,
vc1_intfr_non4mv_mbmode_codes[i], 1, 1, 0);
/* initialize interlaced MVDATA tables (1-Ref) */
ff_vc1_1ref_mvdata_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 39]];
ff_vc1_1ref_mvdata_vlc[i].table_allocated = vlc_offs[i * 3 + 40] - vlc_offs[i * 3 + 39];
vlc_init(&ff_vc1_1ref_mvdata_vlc[i], VC1_1REF_MVDATA_VLC_BITS, 72,
vc1_1ref_mvdata_bits[i], 1, 1,
vc1_1ref_mvdata_codes[i], 4, 4, VLC_INIT_USE_STATIC);
}
for (int i = 0; i < 4; i++) {
ff_vc1_1ref_mvdata_vlc[i] =
ff_vlc_init_tables(&state, VC1_1REF_MVDATA_VLC_BITS, 72,
vc1_1ref_mvdata_bits[i], 1, 1,
vc1_1ref_mvdata_codes[i], 4, 4, 0);
/* Initialize 2MV Block pattern VLC tables */
ff_vc1_2mv_block_pattern_vlc[i].table = &vlc_table[vlc_offs[i + 49]];
ff_vc1_2mv_block_pattern_vlc[i].table_allocated = vlc_offs[i + 50] - vlc_offs[i + 49];
vlc_init(&ff_vc1_2mv_block_pattern_vlc[i], VC1_2MV_BLOCK_PATTERN_VLC_BITS, 4,
vc1_2mv_block_pattern_bits[i], 1, 1,
vc1_2mv_block_pattern_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_2mv_block_pattern_vlc[i] =
ff_vlc_init_tables(&state, VC1_2MV_BLOCK_PATTERN_VLC_BITS, 4,
vc1_2mv_block_pattern_bits[i], 1, 1,
vc1_2mv_block_pattern_codes[i], 1, 1, 0);
}
for (int i = 0; i < 8; i++) {
ff_vc1_ac_coeff_table[i] =
ff_vlc_init_tables(&state, AC_VLC_BITS, ff_vc1_ac_sizes[i],
&vc1_ac_tables[i][0][1], 8, 4,
&vc1_ac_tables[i][0][0], 8, 4, 0);
/* initialize interlaced MVDATA tables (2-Ref) */
ff_vc1_2ref_mvdata_vlc[i] =
ff_vlc_init_tables(&state, VC1_2REF_MVDATA_VLC_BITS, 126,
vc1_2ref_mvdata_bits[i], 1, 1,
vc1_2ref_mvdata_codes[i], 4, 4, 0);
/* Initialize interlaced CBPCY VLC tables (Table 124 - Table 131) */
ff_vc1_icbpcy_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 53]];
ff_vc1_icbpcy_vlc[i].table_allocated = vlc_offs[i * 3 + 54] - vlc_offs[i * 3 + 53];
vlc_init(&ff_vc1_icbpcy_vlc[i], VC1_ICBPCY_VLC_BITS, 63,
vc1_icbpcy_p_bits[i], 1, 1,
vc1_icbpcy_p_codes[i], 2, 2, VLC_INIT_USE_STATIC);
ff_vc1_icbpcy_vlc[i] =
ff_vlc_init_tables(&state, VC1_ICBPCY_VLC_BITS, 63,
vc1_icbpcy_p_bits[i], 1, 1,
vc1_icbpcy_p_codes[i], 2, 2, 0);
/* Initialize interlaced field picture MBMODE VLC tables */
ff_vc1_if_mmv_mbmode_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 54]];
ff_vc1_if_mmv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 55] - vlc_offs[i * 3 + 54];
vlc_init(&ff_vc1_if_mmv_mbmode_vlc[i], VC1_IF_MMV_MBMODE_VLC_BITS, 8,
vc1_if_mmv_mbmode_bits[i], 1, 1,
vc1_if_mmv_mbmode_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_if_1mv_mbmode_vlc[i].table = &vlc_table[vlc_offs[i * 3 + 55]];
ff_vc1_if_1mv_mbmode_vlc[i].table_allocated = vlc_offs[i * 3 + 56] - vlc_offs[i * 3 + 55];
vlc_init(&ff_vc1_if_1mv_mbmode_vlc[i], VC1_IF_1MV_MBMODE_VLC_BITS, 6,
vc1_if_1mv_mbmode_bits[i], 1, 1,
vc1_if_1mv_mbmode_codes[i], 1, 1, VLC_INIT_USE_STATIC);
ff_vc1_if_mmv_mbmode_vlc[i] =
ff_vlc_init_tables(&state, VC1_IF_MMV_MBMODE_VLC_BITS, 8,
vc1_if_mmv_mbmode_bits[i], 1, 1,
vc1_if_mmv_mbmode_codes[i], 1, 1, 0);
ff_vc1_if_1mv_mbmode_vlc[i] =
ff_vlc_init_tables(&state, VC1_IF_1MV_MBMODE_VLC_BITS, 6,
vc1_if_1mv_mbmode_bits[i], 1, 1,
vc1_if_1mv_mbmode_codes[i], 1, 1, 0);
}
ff_msmp4_vc1_vlcs_init_once();
}