[FFmpeg-devel] [PATCH 084/114] avcodec/vc1: Use symbols table to parse macroblock mode
Andreas Rheinhardt
andreas.rheinhardt at gmail.com
Tue Nov 10 12:48:21 EET 2020
Expressions like array[get_vlc2()] can be optimized by using a symbols
table if the array is always the same for a given VLC. This requirement
is fulfilled for the VLCs used to parse the macroblock mode (MBMODE)
element for frame P and B pictures. MBMODE consists of four pieces of
information which can easily be encoded on one byte. Doing so not only
avoids a dereference, but also some space as the table containing this
information becomes redundant; furthermore, some of the VLCs used were
initialized with code tables of type uint16_t which are now replaced by
symbol tables of type uint8_t (thanks to ff_init_vlc_from_lengths()),
thereby saving space.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
---
libavcodec/vc1.c | 14 ++--
libavcodec/vc1_block.c | 41 +++++-----
libavcodec/vc1data.c | 177 +++++++++++++++++++++++++++--------------
libavcodec/vc1data.h | 18 +++--
4 files changed, 155 insertions(+), 95 deletions(-)
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 8c8d701ef8..9eb02f88b3 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -1439,15 +1439,17 @@ av_cold int ff_vc1_init_common(VC1Context *v)
/* 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];
- init_vlc(&ff_vc1_intfr_4mv_mbmode_vlc[i], VC1_INTFR_4MV_MBMODE_VLC_BITS, 15,
- ff_vc1_intfr_4mv_mbmode_bits[i], 1, 1,
- ff_vc1_intfr_4mv_mbmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
+ ff_init_vlc_from_lengths(&ff_vc1_intfr_4mv_mbmode_vlc[i], VC1_INTFR_4MV_MBMODE_VLC_BITS, 15,
+ &ff_vc1_intfr_4mv_mbmode_tabs[i][0][1], 2,
+ &ff_vc1_intfr_4mv_mbmode_tabs[i][0][0], 2, 1,
+ 0, INIT_VLC_USE_NEW_STATIC);
/* 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];
- init_vlc(&ff_vc1_intfr_non4mv_mbmode_vlc[i], VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 9,
- ff_vc1_intfr_non4mv_mbmode_bits[i], 1, 1,
- ff_vc1_intfr_non4mv_mbmode_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
+ ff_init_vlc_from_lengths(&ff_vc1_intfr_non4mv_mbmode_vlc[i], VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 9,
+ &ff_vc1_intfr_non4mv_mbmode_tabs[i][0][1], 2,
+ &ff_vc1_intfr_non4mv_mbmode_tabs[i][0][0], 2, 1,
+ 0, INIT_VLC_USE_NEW_STATIC);
/* 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];
diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c
index 6820ffb0d7..18637e75d8 100644
--- a/libavcodec/vc1_block.c
+++ b/libavcodec/vc1_block.c
@@ -1518,7 +1518,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
int dst_idx, off;
int skipped, fourmv = 0, twomv = 0;
int block_cbp = 0, pat, block_tt = 0;
- int idx_mbmode = 0, mvbp;
+ int mvbp;
int fieldtx;
mquant = v->pq; /* Lossy initialization */
@@ -1528,11 +1528,11 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
else
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
- else
- idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2); // in a single line
- switch (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0]) {
+ int bits = v->fourmvswitch ? VC1_INTFR_4MV_MBMODE_VLC_BITS :
+ VC1_INTFR_NON4MV_MBMODE_VLC_BITS;
+ int mbmode = get_vlc2(gb, v->mbmode_vlc->table, bits, 2);
+
+ switch (mbmode & 0x1F) {
/* store the motion vector type in a flag (useful later) */
case MV_PMODE_INTFR_4MV:
fourmv = 1;
@@ -1562,7 +1562,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
v->blk_mv_type[s->block_index[3]] = 0;
break;
}
- if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
+ if ((mbmode & 0x1F) == MV_PMODE_INTFR_INTRA) { // intra MB
for (i = 0; i < 4; i++) {
s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
@@ -1605,21 +1605,21 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
}
} else { // inter MB
- mb_has_coeffs = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][3];
+ mb_has_coeffs = !!(mbmode & RESIDUAL);
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
- if (ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
+ if ((mbmode & 0x1F) == MV_PMODE_INTFR_2MV_FIELD) {
v->twomvbp = get_vlc2(gb, v->twomvbp_vlc->table, 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)) {
+ if (((mbmode & 0x1F) == MV_PMODE_INTFR_4MV) ||
+ ((mbmode & 0x1F) == MV_PMODE_INTFR_4MV_FIELD)) {
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1);
}
}
s->mb_intra = v->is_intra[s->mb_x] = 0;
for (i = 0; i < 6; i++)
v->mb_type[0][s->block_index[i]] = 0;
- fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][1];
+ fieldtx = v->fieldtx_plane[mb_pos] = !!(mbmode & FIELDTX);
/* for all motion vector read MVDATA and motion compensate each block */
dst_idx = 0;
if (fourmv) {
@@ -1650,7 +1650,7 @@ static int vc1_decode_p_mb_intfr(VC1Context *v)
ff_vc1_mc_4mv_luma(v, 3, 0, 0);
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
} else {
- mvbp = ff_vc1_mbmode_intfrp[v->fourmvswitch][idx_mbmode][2];
+ mvbp = !!(mbmode & MVDIFF);
dmv_x = dmv_y = 0;
if (mvbp) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, NULL);
@@ -2175,7 +2175,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
int dst_idx, off;
int skipped, direct, twomv = 0;
int block_cbp = 0, pat, block_tt = 0;
- int idx_mbmode = 0, mvbp;
+ int mbmode = MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, mvbp;
int stride_y, fieldtx;
int bmvtype = BMV_TYPE_BACKWARD;
int dir, dir2;
@@ -2188,8 +2188,9 @@ 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);
- if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_2MV_FIELD) {
+ mbmode = get_vlc2(gb, v->mbmode_vlc->table,
+ VC1_INTFR_NON4MV_MBMODE_VLC_BITS, 2);
+ if ((mbmode & 0x1F) == MV_PMODE_INTFR_2MV_FIELD) {
twomv = 1;
v->blk_mv_type[s->block_index[0]] = 1;
v->blk_mv_type[s->block_index[1]] = 1;
@@ -2203,7 +2204,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
}
}
- if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == MV_PMODE_INTFR_INTRA) { // intra MB
+ if ((mbmode & 0x1F) == MV_PMODE_INTFR_INTRA) { // intra MB
for (i = 0; i < 4; i++) {
s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = 0;
s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = 0;
@@ -2309,7 +2310,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
}
if (!skipped) { // inter MB
- mb_has_coeffs = ff_vc1_mbmode_intfrp[0][idx_mbmode][3];
+ mb_has_coeffs = !!(mbmode & RESIDUAL);
if (mb_has_coeffs)
cbp = 1 + get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
if (!direct) {
@@ -2322,7 +2323,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
for (i = 0; i < 6; i++)
v->mb_type[0][s->block_index[i]] = 0;
- fieldtx = v->fieldtx_plane[mb_pos] = ff_vc1_mbmode_intfrp[0][idx_mbmode][1];
+ fieldtx = v->fieldtx_plane[mb_pos] = !!(mbmode & FIELDTX);
/* for all motion vector read MVDATA and motion compensate each block */
dst_idx = 0;
if (direct) {
@@ -2404,7 +2405,7 @@ static int vc1_decode_b_mb_intfr(VC1Context *v)
} else {
dir = bmvtype == BMV_TYPE_BACKWARD;
- mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
+ mvbp = !!(mbmode & MVDIFF);
dmv_x = dmv_y = 0;
if (mvbp)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, NULL);
diff --git a/libavcodec/vc1data.c b/libavcodec/vc1data.c
index 701d285561..30d8585723 100644
--- a/libavcodec/vc1data.c
+++ b/libavcodec/vc1data.c
@@ -42,41 +42,6 @@ const uint8_t ff_vc1_mv_pmode_table2[2][4] = {
{ MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_1MV_HPEL_BILIN }
};
-/* MBMODE table for interlaced frame P-picture */
-const uint8_t ff_vc1_mbmode_intfrp[2][15][4] = {
- { /* 1: 4-MV, 0: non-4-MV */
- /* Type, FIELDTX, 1-MV Differential present, Residuals (CBP) present */
- /* Table 164 - Table 167 */
- { MV_PMODE_INTFR_1MV , 0, 1, 1 },
- { MV_PMODE_INTFR_1MV , 1, 1, 1 },
- { MV_PMODE_INTFR_1MV , 0, 1, 0 },
- { MV_PMODE_INTFR_1MV , 0, 0, 1 },
- { MV_PMODE_INTFR_1MV , 1, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 0, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 1, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 1, 0, 0 },
- { MV_PMODE_INTFR_INTRA , 0, 0, 0 }
- },
- {
- /* Table 160 - Table 163 */
- { MV_PMODE_INTFR_1MV , 0, 1, 1 },
- { MV_PMODE_INTFR_1MV , 1, 1, 1 },
- { MV_PMODE_INTFR_1MV , 0, 1, 0 },
- { MV_PMODE_INTFR_1MV , 0, 0, 1 },
- { MV_PMODE_INTFR_1MV , 1, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 0, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 1, 0, 1 },
- { MV_PMODE_INTFR_2MV_FIELD, 1, 0, 0 },
- { MV_PMODE_INTFR_4MV , 0, 0, 1 },
- { MV_PMODE_INTFR_4MV , 1, 0, 1 },
- { MV_PMODE_INTFR_4MV , 0, 0, 0 },
- { MV_PMODE_INTFR_4MV_FIELD, 0, 0, 1 },
- { MV_PMODE_INTFR_4MV_FIELD, 1, 0, 1 },
- { MV_PMODE_INTFR_4MV_FIELD, 1, 0, 0 },
- { MV_PMODE_INTFR_INTRA , 0, 0, 0 }
- }
-};
-
const int ff_vc1_fps_nr[7] = { 24, 25, 30, 50, 60, 48, 72 },
ff_vc1_fps_dr[2] = { 1000, 1001 };
const uint8_t ff_vc1_pquant_table[3][32] = {
@@ -256,34 +221,124 @@ const uint8_t ff_vc1_2mv_block_pattern_bits[4][4] = {
{ 2, 2, 2, 2 }, { 1, 2, 3, 3 }, { 3, 2, 3, 1 }, { 1, 3, 3, 2 }
};
-/* Interlaced frame picture 4MV MBMODE VLC tables (p. 246, p. 360) */
-const uint16_t ff_vc1_intfr_4mv_mbmode_codes[4][15] = {
- { 22, 17, 0, 47, 32, 10, 1, 3, 67, 133, 132, 92, 19, 93, 18 },
- { 3, 45, 0, 7, 23, 6, 1, 2, 10, 39, 44, 8, 18, 77, 76 },
- { 15, 6, 28, 9, 41, 6, 2, 15, 14, 8, 40, 29, 0, 21, 11 },
- { 7, 198, 1, 2, 193, 13, 25, 0, 97, 1599, 98, 398, 798, 192, 1598 }
-};
-
-const uint8_t ff_vc1_intfr_4mv_mbmode_bits[4][15] = {
- { 5, 5, 2, 6, 6, 4, 2, 2, 7, 8, 8, 7, 5, 7, 5 },
- { 3, 6, 3, 3, 5, 3, 3, 3, 4, 6, 6, 4, 5, 7, 7 },
- { 4, 3, 5, 5, 7, 4, 2, 5, 5, 5, 7, 5, 2, 6, 5 },
- { 4, 9, 1, 3, 9, 5, 6, 2, 8, 12, 8, 10, 11, 9, 12 }
-};
-
-/* Interlaced frame picture NON-4MV MBMODE VLC tables (p. 363) */
-const uint8_t ff_vc1_intfr_non4mv_mbmode_codes[4][9] = {
- { 9, 22, 0, 17, 16, 10, 1, 3, 23 },
- { 7, 0, 5, 2, 1, 1, 6, 3, 4 },
- { 1, 0, 10, 23, 44, 8, 3, 9, 45 },
- { 7, 97, 1, 2, 49, 13, 25, 0, 96 }
+/* Interlaced frame picture 4MV MBMODE VLC tables (tables 160-163) */
+const uint8_t ff_vc1_intfr_4mv_mbmode_tabs[4][15][2] = {
+ {
+ { MV_PMODE_INTFR_1MV | MVDIFF, 2 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_4MV, 8 },
+ { MV_PMODE_INTFR_4MV | FIELDTX | RESIDUAL, 8 },
+ { MV_PMODE_INTFR_4MV | RESIDUAL, 7 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_INTRA, 5 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_4MV_FIELD | RESIDUAL, 7 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX, 7 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 2 },
+ },
+ {
+ { MV_PMODE_INTFR_1MV | MVDIFF, 3 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 3 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_4MV_FIELD | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_INTRA, 7 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX, 7 },
+ { MV_PMODE_INTFR_4MV | FIELDTX | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_4MV | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_4MV, 6 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 3 },
+ },
+ {
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_4MV | FIELDTX | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_4MV, 7 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 7 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX, 6 },
+ { MV_PMODE_INTFR_INTRA, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_4MV | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_1MV | MVDIFF, 5 },
+ { MV_PMODE_INTFR_4MV_FIELD | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 4 },
+ },
+ {
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 2 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX, 9 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 9 },
+ { MV_PMODE_INTFR_4MV | RESIDUAL, 8 },
+ { MV_PMODE_INTFR_4MV, 8 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 9 },
+ { MV_PMODE_INTFR_4MV_FIELD | RESIDUAL, 10 },
+ { MV_PMODE_INTFR_4MV_FIELD | FIELDTX | RESIDUAL, 11 },
+ { MV_PMODE_INTFR_INTRA, 12 },
+ { MV_PMODE_INTFR_4MV | FIELDTX | RESIDUAL, 12 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_1MV | MVDIFF, 1 },
+ },
};
-const uint8_t ff_vc1_intfr_non4mv_mbmode_bits[4][9] = {
- { 4, 5, 2, 5, 5, 4, 2, 2, 5 },
- { 3, 4, 6, 2, 3, 2, 3, 5, 6 },
- { 2, 2, 4, 5, 6, 4, 2, 4, 6 },
- { 4, 8, 1, 3, 7, 5, 6, 2, 8 }
+/* Interlaced frame picture NON-4MV MBMODE VLC tables (tables 164-167) */
+const uint8_t ff_vc1_intfr_non4mv_mbmode_tabs[4][9][2] = {
+ {
+ { MV_PMODE_INTFR_1MV | MVDIFF, 2 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_INTRA, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 2 },
+ },
+ {
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_INTRA, 6 },
+ { MV_PMODE_INTFR_1MV | MVDIFF, 6 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 5 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 3 },
+ },
+ {
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 2 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 4 },
+ { MV_PMODE_INTFR_1MV | MVDIFF, 4 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_INTRA, 6 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 2 },
+ },
+ {
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX, 2 },
+ { MV_PMODE_INTFR_1MV | RESIDUAL, 3 },
+ { MV_PMODE_INTFR_INTRA, 8 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | MVDIFF | RESIDUAL, 8 },
+ { MV_PMODE_INTFR_1MV | FIELDTX | RESIDUAL, 7 },
+ { MV_PMODE_INTFR_2MV_FIELD | FIELDTX | RESIDUAL, 6 },
+ { MV_PMODE_INTFR_2MV_FIELD | RESIDUAL, 5 },
+ { MV_PMODE_INTFR_1MV | MVDIFF | RESIDUAL, 4 },
+ { MV_PMODE_INTFR_1MV | MVDIFF, 1 },
+ },
};
/* Interlaced field picture MBMODE VLC tables (p. 356 - 11.4.1, 11.4.2) */
diff --git a/libavcodec/vc1data.h b/libavcodec/vc1data.h
index 5a071eb972..935ff4f44d 100644
--- a/libavcodec/vc1data.h
+++ b/libavcodec/vc1data.h
@@ -43,9 +43,6 @@ extern const uint8_t ff_vc1_mv_pmode_table2[2][4];
extern const int ff_vc1_fps_nr[7], ff_vc1_fps_dr[2];
extern const uint8_t ff_vc1_pquant_table[3][32];
-/* MBMODE table for interlaced frame P-picture */
-extern const uint8_t ff_vc1_mbmode_intfrp[2][15][4];
-
/** @name VC-1 VLC tables and defines
* @todo TODO move this into the context
*/
@@ -154,11 +151,16 @@ extern const uint8_t ff_vc1_subblkpat_tabs[3][15][2];
/* MV differential tables, p265 */
extern const uint8_t ff_vc1_mv_diff_tabs[4][73][2];
-/* Interlaced frame picture MBMODE VLC tables (p. 246, p. 360) */
-extern const uint16_t ff_vc1_intfr_4mv_mbmode_codes[4][15];
-extern const uint8_t ff_vc1_intfr_4mv_mbmode_bits[4][15];
-extern const uint8_t ff_vc1_intfr_non4mv_mbmode_codes[4][9];
-extern const uint8_t ff_vc1_intfr_non4mv_mbmode_bits[4][9];
+/* Interlaced frame picture MBMODE VLC tables (tables 160-167)
+ * The lowest five bits of the symbol contain the MBMODE,
+ * the next three bits the following properties: */
+enum MBModeProperties {
+ FIELDTX = 1 << 5,
+ MVDIFF = 1 << 6,
+ RESIDUAL = 1 << 7,
+};
+extern const uint8_t ff_vc1_intfr_4mv_mbmode_tabs[4][15][2];
+extern const uint8_t ff_vc1_intfr_non4mv_mbmode_tabs[4][9][2];
/* Interlaced field picture MBMODE VLC tables (p. 356 - 11.4.1, 11.4.2) */
extern const uint8_t ff_vc1_if_mmv_mbmode_codes[8][8];
--
2.25.1
More information about the ffmpeg-devel
mailing list