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4-MV decoding support 

Originally committed as revision 5591 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Kostya Shishkov 19 years ago
parent
b482e2d12f
commit
e4bf0302a3
1 changed files with 368 additions and 81 deletions
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  1. +368
    -81
      libavcodec/vc1.c

+ 368
- 81
libavcodec/vc1.c View File

@@ -288,6 +288,7 @@ typedef struct VC1Context{
int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding
int pqindex; ///< raw pqindex used in coding set selection
int a_avail, c_avail;
uint8_t *mb_type_base, *mb_type[3];


/** Luma compensation parameters */
@@ -845,10 +846,10 @@ static void vc1_v_overlap(uint8_t* src, int stride)
c = src[0];
d = src[stride];

src[-2*stride] = (7*a + d) >> 3;
src[-stride] = (-a + 7*b + c + d) >> 3;
src[0] = (a + b + 7*c - d) >> 3;
src[stride] = (a + 7*d) >> 3;
src[-2*stride] = clip_uint8((7*a + d + 3) >> 3);
src[-stride] = clip_uint8((-a + 7*b + c + d + 3) >> 3);
src[0] = clip_uint8((a + b + 7*c - d + 3) >> 3);
src[stride] = clip_uint8((a + 7*d + 3) >> 3);
src++;
}
}
@@ -863,10 +864,10 @@ static void vc1_h_overlap(uint8_t* src, int stride)
c = src[0];
d = src[1];

src[-2] = (7*a + d) >> 3;
src[-1] = (-a + 7*b + c + d) >> 3;
src[0] = (a + b + 7*c - d) >> 3;
src[1] = (a + 7*d) >> 3;
src[-2] = clip_uint8((7*a + d + 3) >> 3);
src[-1] = clip_uint8((-a + 7*b + c + d + 3) >> 3);
src[0] = clip_uint8((a + b + 7*c - d + 3) >> 3);
src[1] = clip_uint8((a + 7*d + 3) >> 3);
src += stride;
}
}
@@ -973,6 +974,149 @@ static void vc1_mc_1mv(VC1Context *v)
// dsp->put_mspel_pixels_tab[uvdxy](s->dest[2], srcV, s->uvlinesize);
}

/** Do motion compensation for 4-MV macroblock - luminance block
*/
static void vc1_mc_4mv_luma(VC1Context *v, int n)
{
MpegEncContext *s = &v->s;
DSPContext *dsp = &v->s.dsp;
uint8_t *srcY;
int dxy, mx, my, src_x, src_y;
int off;

if(!v->s.last_picture.data[0])return;
mx = s->mv[0][n][0];
my = s->mv[0][n][1];
srcY = s->last_picture.data[0];

off = s->linesize * 4 * (n&2) + (n&1) * 8;

src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);

CLIP_RANGE(src_x, s->mb_x, s->mb_width * 16, 16);
CLIP_RANGE(src_y, s->mb_y, s->mb_height * 16, 16);

srcY += src_y * s->linesize + src_x;

if((unsigned)src_x > s->h_edge_pos - (mx&3) - 16
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 16+1, 16+1,
src_x, src_y, s->h_edge_pos, s->v_edge_pos);
srcY = s->edge_emu_buffer;
}

if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);

dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);
} else {
dxy = ((my & 3) << 2) | (mx & 3);

dsp->put_no_rnd_qpel_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize);
}
}

#define SETMAXMIN(var) \
if(var > ma) ma = var; \
if(var < mi) mi = var;

static inline int median4(int a, int b, int c, int d)
{
int ma, mi;

ma = mi = a;
SETMAXMIN(b);
SETMAXMIN(c);
SETMAXMIN(d);

return (a + b + c + d - ma - mi) >> 1;
}


/** Do motion compensation for 4-MV macroblock - both chroma blocks
*/
static void vc1_mc_4mv_chroma(VC1Context *v)
{
MpegEncContext *s = &v->s;
DSPContext *dsp = &v->s.dsp;
uint8_t *srcU, *srcV;
int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;
int i, idx, tx = 0, ty = 0;
int mvx[4], mvy[4], intra[4];
static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};

if(!v->s.last_picture.data[0])return;

for(i = 0; i < 4; i++) {
mvx[i] = s->mv[0][i][0];
mvy[i] = s->mv[0][i][1];
intra[i] = v->mb_type[0][s->block_index[i]];
}

/* calculate chroma MV vector from four luma MVs */
idx = (intra[0] << 3) | (intra[1] << 2) | (intra[2] << 1) | intra[3];
if(!idx) { // all blocks are inter
tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);
ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);
} else if(count[idx] == 1) { // 3 inter blocks
switch(idx) {
case 0x1:
tx = mid_pred(mvx[1], mvx[2], mvx[3]);
tx = mid_pred(mvy[1], mvy[2], mvy[3]);
break;
case 0x2:
tx = mid_pred(mvx[0], mvx[2], mvx[3]);
tx = mid_pred(mvy[0], mvy[2], mvy[3]);
break;
case 0x4:
tx = mid_pred(mvx[0], mvx[1], mvx[3]);
tx = mid_pred(mvy[0], mvy[1], mvy[3]);
break;
case 0x8:
tx = mid_pred(mvx[0], mvx[1], mvx[2]);
tx = mid_pred(mvy[0], mvy[1], mvy[2]);
break;
}
} else if(count[idx] == 2) {
int t1 = 0, t2 = 0;
for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}
for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}
tx = (mvx[t1] + mvx[t2]) >> 1;
ty = (mvy[t1] + mvy[t2]) >> 1;
} else
return; //no need to do MC for inter blocks

uvmx = (tx + ((tx&3) == 3)) >> 1;
uvmy = (ty + ((ty&3) == 3)) >> 1;

uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

CLIP_RANGE(uvsrc_x, s->mb_x, s->mb_width * 8, 8);
CLIP_RANGE(uvsrc_y, s->mb_y, s->mb_height * 8, 8);
srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
if((unsigned)uvsrc_x > (s->h_edge_pos >> 1) - ((uvmx >> 1)&1) - 8
|| (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - ((uvmy >> 1)&1) - 8){
ff_emulated_edge_mc(s->edge_emu_buffer , srcU, s->uvlinesize, 8+1, 8+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = s->edge_emu_buffer;
srcV = s->edge_emu_buffer + 16;
}

if(!s->quarter_sample) // hpel mc
uvdxy = 0;
else
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[1], srcU, s->uvlinesize, 8);
dsp->put_no_rnd_pixels_tab[1][uvdxy](s->dest[2], srcV, s->uvlinesize, 8);
}

/**
* Decode Simple/Main Profiles sequence header
* @see Figure 7-8, p16-17
@@ -1189,10 +1333,6 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
else
v->s.quarter_sample = 1;

if(v->mv_mode != MV_PMODE_1MV && v->mv_mode != MV_PMODE_1MV_HPEL && v->mv_mode != MV_PMODE_1MV_HPEL_BILIN) {
av_log(v->s.avctx, AV_LOG_ERROR, "Only 1MV P-frames are supported by now\n");
return -1;
}
if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV)
|| v->mv_mode == MV_PMODE_MIXED_MV)
@@ -1276,6 +1416,48 @@ if(v->mv_mode != MV_PMODE_1MV && v->mv_mode != MV_PMODE_1MV_HPEL && v->mv_mode !
else mquant = get_bits(gb, 5); \
} \
} \
else if(v->dqprofile == DQPROFILE_SINGLE_EDGE) \
{ \
switch(v->dqsbedge){ \
case 0: /* left */ \
mquant = (s->mb_x) ? v->pq : v->altpq; \
break; \
case 1: /* top */ \
mquant = (s->mb_y) ? v->pq : v->altpq; \
break; \
case 2: /* right */ \
mquant = (s->mb_x != (s->mb_width - 1)) ? v->pq : v->altpq; \
break; \
case 3: /* bottom */ \
mquant = (s->mb_y != (s->mb_height-1)) ? v->pq : v->altpq; \
break; \
default: \
mquant = v->pq; \
} \
} \
else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
{ \
switch(v->dqsbedge){ \
case 0: /* left and top */ \
mquant = (s->mb_x && s->mb_y) ? v->pq : v->altpq; \
break; \
case 1: /* top and right */ \
mquant = (s->mb_y && s->mb_x != (s->mb_width - 1)) ? v->pq : v->altpq; \
break; \
case 2: /* right and bottom */ \
mquant = (s->mb_x != (s->mb_width - 1) && s->mb_y != (s->mb_height-1)) ? v->pq : v->altpq; \
break; \
case 3: /* bottom and left */ \
mquant = (s->mb_x && s->mb_y != (s->mb_height-1)) ? v->pq : v->altpq; \
break; \
default: \
mquant = v->pq; \
} \
} \
else if(v->dqprofile == DQPROFILE_FOUR_EDGES) \
{ \
mquant = (s->mb_x && s->mb_y && s->mb_x != (s->mb_width - 1) && s->mb_y != (s->mb_height-1)) ? v->pq : v->altpq; \
} \
else mquant = v->pq; \
}

@@ -1332,27 +1514,57 @@ if(v->mv_mode != MV_PMODE_1MV && v->mv_mode != MV_PMODE_1MV_HPEL && v->mv_mode !

/** Predict and set motion vector
*/
static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1, int r_x, int r_y)
static inline void vc1_pred_mv(MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t* is_intra)
{
int xy, wrap, off;
int xy, wrap, off = 0;
int16_t *A, *B, *C;
int px, py;
int sum;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

/* scale MV difference to be quad-pel */
dmv_x <<= 1 - s->quarter_sample;
dmv_y <<= 1 - s->quarter_sample;

wrap = s->b8_stride;
xy = s->block_index[0];
xy = s->block_index[n];

C = s->current_picture.motion_val[0][xy - (1 << mv1)];
A = s->current_picture.motion_val[0][xy - (wrap << mv1)];
off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
B = s->current_picture.motion_val[0][xy + ((off - wrap) << mv1)];
if(s->mb_intra){
s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;
s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;
if(mv1) { /* duplicate motion data for 1-MV block */
s->current_picture.motion_val[0][xy + 1][0] = 0;
s->current_picture.motion_val[0][xy + 1][1] = 0;
s->current_picture.motion_val[0][xy + wrap][0] = 0;
s->current_picture.motion_val[0][xy + wrap][1] = 0;
s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;
s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;
}
return;
}

C = s->current_picture.motion_val[0][xy - 1];
A = s->current_picture.motion_val[0][xy - wrap];
if(mv1)
off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;
else {
//in 4-MV mode different blocks have different B predictor position
switch(n){
case 0:
off = (s->mb_x > 0) ? -1 : 1;
break;
case 1:
off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
break;
case 2:
off = 1;
break;
case 3:
off = -1;
}
}
B = s->current_picture.motion_val[0][xy - wrap + off];

if(!s->first_slice_line) { // predictor A is not out of bounds
if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds
if(s->mb_width == 1) {
px = A[0];
py = A[1];
@@ -1360,14 +1572,12 @@ static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1,
px = mid_pred(A[0], B[0], C[0]);
py = mid_pred(A[1], B[1], C[1]);
}
} else if(s->mb_x) { // predictor C is not out of bounds
} else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds
px = C[0];
py = C[1];
} else {
px = py = 0;
}
if(s->mb_intra) px = py = 0;

/* Pullback MV as specified in 8.3.5.3.4 */
{
int qx, qy, X, Y;
@@ -1386,8 +1596,8 @@ static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1,
if(qy + py > Y) py = Y - qy;
}
/* Calculate hybrid prediction as specified in 8.3.5.3.5 */
if(!s->mb_intra && !s->first_slice_line && s->mb_x) {
if(IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride]))
if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {
if(is_intra[xy - wrap])
sum = ABS(px) + ABS(py);
else
sum = ABS(px - A[0]) + ABS(py - A[1]);
@@ -1400,7 +1610,7 @@ static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1,
py = C[1];
}
} else {
if(IS_INTRA(s->current_picture.mb_type[mb_pos - 1]))
if(is_intra[xy - 1])
sum = ABS(px) + ABS(py);
else
sum = ABS(px - C[0]) + ABS(py - C[1]);
@@ -1416,8 +1626,16 @@ static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1,
}
}
/* store MV using signed modulus of MV range defined in 4.11 */
s->mv[0][0][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
s->mv[0][0][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
if(mv1) { /* duplicate motion data for 1-MV block */
s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];
s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];
s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];
s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];
s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];
s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];
}
}

/** Get predicted DC value for I-frames only
@@ -1529,15 +1747,13 @@ static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
*dir_ptr = 1;//left
}

/* scale coeffs if needed */
/* scale coeffs if needed
mb_pos2 = mb_pos - *dir_ptr - (1 - *dir_ptr) * s->mb_stride;
q1 = s->current_picture.qscale_table[mb_pos];
q2 = s->current_picture.qscale_table[mb_pos2];
if(0 && q1 && q2 && q1 != q2) {
q1 = s->y_dc_scale_table[q1];
q2 = s->y_dc_scale_table[q2];
q1 = s->y_dc_scale_table[s->current_picture.qscale_table[mb_pos]];
q2 = s->y_dc_scale_table[s->current_picture.qscale_table[mb_pos2]];
if(q2 && q1!=q2 && ((*dir_ptr && c_avail) || (!*dir_ptr && a_avail))) {
pred = (pred * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
} */

/* update predictor */
*dc_val_ptr = &dc_val[0];
@@ -1695,7 +1911,6 @@ static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded
*dc_val = dcdiff;

/* Store the quantized DC coeff, used for prediction */

if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
@@ -1926,7 +2141,7 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c
q1 = s->current_picture.qscale_table[mb_pos];
q2 = s->current_picture.qscale_table[mb_pos2];

if(q2 && q1 != q2) {
if(0 && q2 && q1!=q2 && ((dc_pred_dir && c_avail) || (!dc_pred_dir && a_avail))) {
q1 = q1 * 2 - 1;
q2 = q2 * 2 - 1;

@@ -1968,6 +2183,11 @@ not_coded:
if(!coded) {
int k, scale;
int use_pred = s->ac_pred;
int mb_pos2, q1, q2;

mb_pos2 = mb_pos - dc_pred_dir - (1 - dc_pred_dir) * s->mb_stride;
q1 = s->current_picture.qscale_table[mb_pos];
q2 = s->current_picture.qscale_table[mb_pos2];

ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
@@ -1987,25 +2207,39 @@ not_coded:
memset(ac_val2, 0, 16 * 2);
if(dc_pred_dir) {//left
ac_val -= 16;
if(use_pred)
if(use_pred) {
memcpy(ac_val2, ac_val, 8 * 2);
if(0 && q2 && q1!=q2 && c_avail) {
q1 = q1 * 2 - 1;
q2 = q2 * 2 - 1;
for(k = 1; k < 8; k++)
ac_val2[k] = (ac_val2[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
}
} else {//top
ac_val -= 16 * s->block_wrap[n];
if(use_pred)
if(use_pred) {
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
if(0 && q2 && q1!=q2 && a_avail) {
q1 = q1 * 2 - 1;
q2 = q2 * 2 - 1;
for(k = 1; k < 8; k++)
ac_val2[k + 8] = (ac_val2[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
}
}

/* apply AC prediction if needed */
if(use_pred) {
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++) {
block[k << 3] = ac_val[k] * scale;
block[k << 3] = ac_val2[k] * scale;
if(!v->pquantizer)
block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
}
} else { //top
for(k = 1; k < 8; k++) {
block[k] = ac_val[k + 8] * scale;
block[k] = ac_val2[k + 8] * scale;
if(!v->pquantizer)
block[k] += (block[k] < 0) ? -mquant : mquant;
}
@@ -2133,7 +2367,6 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp; /* cbp decoding stuff */
int hybrid_pred; /* Prediction types */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttmb; /* MB Transform type */
int status;
@@ -2159,6 +2392,8 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
else
skipped = v->s.mbskip_table[mb_pos];

s->dsp.clear_blocks(s->block[0]);

if (!fourmv) /* 1MV mode */
{
if (!skipped)
@@ -2166,7 +2401,7 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
GET_MVDATA(dmv_x, dmv_y);

s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
vc1_pred_mv(s, dmv_x, dmv_y, 1, v->range_x, v->range_y);
vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

/* FIXME Set DC val for inter block ? */
if (s->mb_intra && !mb_has_coeffs)
@@ -2191,8 +2426,7 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
VC1_TTMB_VLC_BITS, 2);
s->dsp.clear_blocks(block[0]);
vc1_mc_1mv(v);
if(!s->mb_intra) vc1_mc_1mv(v);
dst_idx = 0;
for (i=0; i<6; i++)
{
@@ -2200,13 +2434,14 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
v->mb_type[0][s->block_index[i]] = s->mb_intra;
if(s->mb_intra) {
/* check if prediction blocks A and C are available */
v->a_avail = v->c_avail = 0;
if((i == 2 || i == 3) || (s->mb_y && IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride])))
v->a_avail = 1;
if((i == 1 || i == 3) || (s->mb_x && IS_INTRA(s->current_picture.mb_type[mb_pos - 1])))
v->c_avail = 1;
if(i == 2 || i == 3 || s->mb_y)
v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
if(i == 1 || i == 3 || s->mb_x)
v->c_avail = v->mb_type[0][s->block_index[i] - 1];

vc1_decode_intra_block(v, block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
vc1_inv_trans(block[i], 8, 8);
@@ -2230,62 +2465,107 @@ static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
else //Skipped
{
s->mb_intra = 0;
for(i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
vc1_pred_mv(s, 0, 0, 1, v->range_x, v->range_y);
s->current_picture.qscale_table[mb_pos] = 0;
vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);
vc1_mc_1mv(v);
return 0;
}
} //1MV mode
else //4MV mode
{//FIXME: looks not conforming to standard and is not even theoretically complete
{
if (!skipped /* unskipped MB */)
{
int blk_intra[4], blk_coded[4];
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);
for (i=0; i<4; i++)
for (i=0; i<6; i++)
{
val = ((cbp >> (5 - i)) & 1);
blk_intra[i] = 0;
blk_coded[i] = val;
if(val) {
GET_MVDATA(dmv_x, dmv_y);
blk_intra[i] = s->mb_intra;
s->dc_val[0][s->block_index[i]] = 0;
s->mb_intra = 0;
if(i < 4) {
dmv_x = dmv_y = 0;
s->mb_intra = 0;
mb_has_coeffs = 0;
if(val) {
GET_MVDATA(dmv_x, dmv_y);
}
vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);
if(!s->mb_intra) vc1_mc_4mv_luma(v, i);
intra_count += s->mb_intra;
is_intra[i] = s->mb_intra;
is_coded[i] = mb_has_coeffs;
}
if(i&4){
is_intra[i] = (intra_count >= 3);
is_coded[i] = val;
}
if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
hybrid_pred = get_bits(gb, 1);
if(i == 4) vc1_mc_4mv_chroma(v);
v->mb_type[0][s->block_index[i]] = is_intra[i];
if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];
}
if((blk_intra[0] | blk_intra[1] | blk_intra[2] | blk_intra[3]) ||
(blk_coded[0] | blk_coded[1] | blk_coded[2] | blk_coded[3])) {
GET_MQUANT();
dst_idx = 0;
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* test if block is intra and has pred */
{
int intrapred = 0;
for(i=0; i<6; i++)
if(is_intra[i]) {
if(v->mb_type[0][s->block_index[i] - s->block_wrap[i]] || v->mb_type[0][s->block_index[i] - 1]) {
intrapred = 1;
break;
}
}
if(intrapred)s->ac_pred = get_bits(gb, 1);
else s->ac_pred = 0;
}
if (!v->ttmbf && coded_inter)
ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 12);
for (i=0; i<6; i++)
{
dst_idx += i >> 2;
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
s->mb_intra = is_intra[i];
if (is_intra[i]) {
/* check if prediction blocks A and C are available */
v->a_avail = v->c_avail = 0;
if(i == 2 || i == 3 || s->mb_y)
v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];
if(i == 1 || i == 3 || s->mb_x)
v->c_avail = v->mb_type[0][s->block_index[i] - 1];

if (s->mb_intra /* One of the 4 blocks is intra */
/* non-zero pred for that block */)
s->ac_pred = get_bits(gb, 1);
if (!v->ttmbf)
ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
VC1_TTMB_VLC_BITS, 12);
for(i = 0; i < 6; i++) {
val = ((cbp >> (5 - i)) & 1);
if(i & 4 || blk_intra[i] || val) {
if(i < 4 && blk_intra[i])
status = vc1_decode_intra_block(v, block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
else
status = vc1_decode_p_block(v, block[i], i, mquant, ttmb, 0);
vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);
//s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
/* TODO: proper loop filtering */
if(v->pq >= 9 && v->overlap) {
if(v->a_avail)
s->dsp.h263_v_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
if(v->c_avail)
s->dsp.h263_h_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
}
} else if(is_coded[i]) {
status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);
if(!v->ttmbf && ttmb < 8) ttmb = -1;
first_block = 0;
//s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
}
}
return status;
}
else //Skipped MB
{
/* XXX: Skipped => cbp=0 and mquant doesn't matter ? */
for (i=0; i<4; i++)
{
if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
hybrid_pred = get_bits(gb, 1);
vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);
vc1_mc_4mv_luma(v, i);
}
/* TODO: blah */
vc1_mc_4mv_chroma(v);
for(i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
s->current_picture.qscale_table[mb_pos] = 0;
return 0;
}
}
@@ -2519,6 +2799,12 @@ static int vc1_decode_init(AVCodecContext *avctx)
/* Allocate mb bitplanes */
v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

/* allocate block type info in that way so it could be used with s->block_index[] */
v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);
v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;
v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;
v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

/* Init coded blocks info */
if (v->profile == PROFILE_ADVANCED)
{
@@ -2640,6 +2926,7 @@ static int vc1_decode_end(AVCodecContext *avctx)
av_freep(&v->hrd_buffer);
MPV_common_end(&v->s);
av_freep(&v->mv_type_mb_plane);
av_freep(&v->mb_type_base);
return 0;
}



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