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FFmpeg/libavcodec/vc1_block.c
Vittorio Giovara 0c6a70873f intrax8: Move error resilience out of intrax8 
The intrax8 decoding process does not imply any kind of error
resilience, and the only call present is more related to how mpegvideo
works rather than anything else.

Therefore have the parent decoders carry out er when actually needed.
2016-03-22 16:51:09 -04:00

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/*
* VC-1 and WMV3 decoder
* Copyright (c) 2011 Mashiat Sarker Shakkhar
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VC-1 and WMV3 block decoding routines
*/
#include "avcodec.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "msmpeg4data.h"
#include "unary.h"
#include "vc1.h"
#include "vc1_pred.h"
#include "vc1acdata.h"
#include "vc1data.h"
#define MB_INTRA_VLC_BITS 9
#define DC_VLC_BITS 9
// offset tables for interlaced picture MVDATA decoding
static const int offset_table1[9] = { 0, 1, 2, 4, 8, 16, 32, 64, 128 };
static const int offset_table2[9] = { 0, 1, 3, 7, 15, 31, 63, 127, 255 };
/***********************************************************************/
/**
* @name VC-1 Bitplane decoding
* @see 8.7, p56
* @{
*/
/**
* Imode types
* @{
*/
enum Imode {
IMODE_RAW,
IMODE_NORM2,
IMODE_DIFF2,
IMODE_NORM6,
IMODE_DIFF6,
IMODE_ROWSKIP,
IMODE_COLSKIP
};
/** @} */ //imode defines
static void init_block_index(VC1Context *v)
{
MpegEncContext *s = &v->s;
ff_init_block_index(s);
if (v->field_mode && !(v->second_field ^ v->tff)) {
s->dest[0] += s->current_picture_ptr->f->linesize[0];
s->dest[1] += s->current_picture_ptr->f->linesize[1];
s->dest[2] += s->current_picture_ptr->f->linesize[2];
}
}
/** @} */ //Bitplane group
static void vc1_put_signed_blocks_clamped(VC1Context *v)
{
MpegEncContext *s = &v->s;
int topleft_mb_pos, top_mb_pos;
int stride_y, fieldtx = 0;
int v_dist;
/* The put pixels loop is always one MB row behind the decoding loop,
* because we can only put pixels when overlap filtering is done, and
* for filtering of the bottom edge of a MB, we need the next MB row
* present as well.
* Within the row, the put pixels loop is also one MB col behind the
* decoding loop. The reason for this is again, because for filtering
* of the right MB edge, we need the next MB present. */
if (!s->first_slice_line) {
if (s->mb_x) {
topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1;
if (v->fcm == ILACE_FRAME)
fieldtx = v->fieldtx_plane[topleft_mb_pos];
stride_y = s->linesize << fieldtx;
v_dist = (16 - fieldtx) >> (fieldtx == 0);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0],
s->dest[0] - 16 * s->linesize - 16,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1],
s->dest[0] - 16 * s->linesize - 8,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2],
s->dest[0] - v_dist * s->linesize - 16,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3],
s->dest[0] - v_dist * s->linesize - 8,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4],
s->dest[1] - 8 * s->uvlinesize - 8,
s->uvlinesize);
s->idsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5],
s->dest[2] - 8 * s->uvlinesize - 8,
s->uvlinesize);
}
if (s->mb_x == s->mb_width - 1) {
top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x;
if (v->fcm == ILACE_FRAME)
fieldtx = v->fieldtx_plane[top_mb_pos];
stride_y = s->linesize << fieldtx;
v_dist = fieldtx ? 15 : 8;
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0],
s->dest[0] - 16 * s->linesize,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1],
s->dest[0] - 16 * s->linesize + 8,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2],
s->dest[0] - v_dist * s->linesize,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3],
s->dest[0] - v_dist * s->linesize + 8,
stride_y);
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4],
s->dest[1] - 8 * s->uvlinesize,
s->uvlinesize);
s->idsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5],
s->dest[2] - 8 * s->uvlinesize,
s->uvlinesize);
}
}
#define inc_blk_idx(idx) do { \
idx++; \
if (idx >= v->n_allocated_blks) \
idx = 0; \
} while (0)
inc_blk_idx(v->topleft_blk_idx);
inc_blk_idx(v->top_blk_idx);
inc_blk_idx(v->left_blk_idx);
inc_blk_idx(v->cur_blk_idx);
}
/***********************************************************************/
/**
* @name VC-1 Block-level functions
* @see 7.1.4, p91 and 8.1.1.7, p(1)04
* @{
*/
/**
* @def GET_MQUANT
* @brief Get macroblock-level quantizer scale
*/
#define GET_MQUANT() \
if (v->dquantfrm) { \
int edges = 0; \
if (v->dqprofile == DQPROFILE_ALL_MBS) { \
if (v->dqbilevel) { \
mquant = (get_bits1(gb)) ? v->altpq : v->pq; \
} else { \
mqdiff = get_bits(gb, 3); \
if (mqdiff != 7) \
mquant = v->pq + mqdiff; \
else \
mquant = get_bits(gb, 5); \
} \
} \
if (v->dqprofile == DQPROFILE_SINGLE_EDGE) \
edges = 1 << v->dqsbedge; \
else if (v->dqprofile == DQPROFILE_DOUBLE_EDGES) \
edges = (3 << v->dqsbedge) % 15; \
else if (v->dqprofile == DQPROFILE_FOUR_EDGES) \
edges = 15; \
if ((edges&1) && !s->mb_x) \
mquant = v->altpq; \
if ((edges&2) && s->first_slice_line) \
mquant = v->altpq; \
if ((edges&4) && s->mb_x == (s->mb_width - 1)) \
mquant = v->altpq; \
if ((edges&8) && s->mb_y == (s->mb_height - 1)) \
mquant = v->altpq; \
if (!mquant || mquant > 31) { \
av_log(v->s.avctx, AV_LOG_ERROR, \
"Overriding invalid mquant %d\n", mquant); \
mquant = 1; \
} \
}
/**
* @def GET_MVDATA(_dmv_x, _dmv_y)
* @brief Get MV differentials
* @see MVDATA decoding from 8.3.5.2, p(1)20
* @param _dmv_x Horizontal differential for decoded MV
* @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, \
VC1_MV_DIFF_VLC_BITS, 2); \
if (index > 36) { \
mb_has_coeffs = 1; \
index -= 37; \
} else \
mb_has_coeffs = 0; \
s->mb_intra = 0; \
if (!index) { \
_dmv_x = _dmv_y = 0; \
} else if (index == 35) { \
_dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
_dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
} else if (index == 36) { \
_dmv_x = 0; \
_dmv_y = 0; \
s->mb_intra = 1; \
} else { \
index1 = index % 6; \
if (!s->quarter_sample && index1 == 5) val = 1; \
else val = 0; \
if (size_table[index1] - val > 0) \
val = get_bits(gb, size_table[index1] - val); \
else val = 0; \
sign = 0 - (val&1); \
_dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
\
index1 = index / 6; \
if (!s->quarter_sample && index1 == 5) val = 1; \
else val = 0; \
if (size_table[index1] - val > 0) \
val = get_bits(gb, size_table[index1] - val); \
else val = 0; \
sign = 0 - (val & 1); \
_dmv_y = (sign ^ ((val >> 1) + offset_table[index1])) - sign; \
}
static av_always_inline void get_mvdata_interlaced(VC1Context *v, int *dmv_x,
int *dmv_y, int *pred_flag)
{
int index, index1;
int extend_x = 0, extend_y = 0;
GetBitContext *gb = &v->s.gb;
int bits, esc;
int val, sign;
const int* offs_tab;
if (v->numref) {
bits = VC1_2REF_MVDATA_VLC_BITS;
esc = 125;
} else {
bits = VC1_1REF_MVDATA_VLC_BITS;
esc = 71;
}
switch (v->dmvrange) {
case 1:
extend_x = 1;
break;
case 2:
extend_y = 1;
break;
case 3:
extend_x = extend_y = 1;
break;
}
index = get_vlc2(gb, v->imv_vlc->table, bits, 3);
if (index == esc) {
*dmv_x = get_bits(gb, v->k_x);
*dmv_y = get_bits(gb, v->k_y);
if (v->numref) {
if (pred_flag) {
*pred_flag = *dmv_y & 1;
*dmv_y = (*dmv_y + *pred_flag) >> 1;
} else {
*dmv_y = (*dmv_y + (*dmv_y & 1)) >> 1;
}
}
}
else {
if (extend_x)
offs_tab = offset_table2;
else
offs_tab = offset_table1;
index1 = (index + 1) % 9;
if (index1 != 0) {
val = get_bits(gb, index1 + extend_x);
sign = 0 -(val & 1);
*dmv_x = (sign ^ ((val >> 1) + offs_tab[index1])) - sign;
} else
*dmv_x = 0;
if (extend_y)
offs_tab = offset_table2;
else
offs_tab = offset_table1;
index1 = (index + 1) / 9;
if (index1 > v->numref) {
val = get_bits(gb, (index1 + (extend_y << v->numref)) >> v->numref);
sign = 0 - (val & 1);
*dmv_y = (sign ^ ((val >> 1) + offs_tab[index1 >> v->numref])) - sign;
} else
*dmv_y = 0;
if (v->numref && pred_flag)
*pred_flag = index1 & 1;
}
}
/** Reconstruct motion vector for B-frame and do motion compensation
*/
static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2],
int direct, int mode)
{
if (direct) {
ff_vc1_mc_1mv(v, 0);
ff_vc1_interp_mc(v);
return;
}
if (mode == BMV_TYPE_INTERPOLATED) {
ff_vc1_mc_1mv(v, 0);
ff_vc1_interp_mc(v);
return;
}
ff_vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));
}
/** Get predicted DC value for I-frames only
* prediction dir: left=0, top=1
* @param s MpegEncContext
* @param overlap flag indicating that overlap filtering is used
* @param pq integer part of picture quantizer
* @param[in] n block index in the current MB
* @param dc_val_ptr Pointer to DC predictor
* @param dir_ptr Prediction direction for use in AC prediction
*/
static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
int16_t **dc_val_ptr, int *dir_ptr)
{
int a, b, c, wrap, pred, scale;
int16_t *dc_val;
static const uint16_t dcpred[32] = {
-1, 1024, 512, 341, 256, 205, 171, 146, 128,
114, 102, 93, 85, 79, 73, 68, 64,
60, 57, 54, 51, 49, 47, 45, 43,
41, 39, 38, 37, 35, 34, 33
};
/* find prediction - wmv3_dc_scale always used here in fact */
if (n < 4) scale = s->y_dc_scale;
else scale = s->c_dc_scale;
wrap = s->block_wrap[n];
dc_val = s->dc_val[0] + s->block_index[n];
/* B A
* C X
*/
c = dc_val[ - 1];
b = dc_val[ - 1 - wrap];
a = dc_val[ - wrap];
if (pq < 9 || !overlap) {
/* Set outer values */
if (s->first_slice_line && (n != 2 && n != 3))
b = a = dcpred[scale];
if (s->mb_x == 0 && (n != 1 && n != 3))
b = c = dcpred[scale];
} else {
/* Set outer values */
if (s->first_slice_line && (n != 2 && n != 3))
b = a = 0;
if (s->mb_x == 0 && (n != 1 && n != 3))
b = c = 0;
}
if (abs(a - b) <= abs(b - c)) {
pred = c;
*dir_ptr = 1; // left
} else {
pred = a;
*dir_ptr = 0; // top
}
/* update predictor */
*dc_val_ptr = &dc_val[0];
return pred;
}
/** Get predicted DC value
* prediction dir: left=0, top=1
* @param s MpegEncContext
* @param overlap flag indicating that overlap filtering is used
* @param pq integer part of picture quantizer
* @param[in] n block index in the current MB
* @param a_avail flag indicating top block availability
* @param c_avail flag indicating left block availability
* @param dc_val_ptr Pointer to DC predictor
* @param dir_ptr Prediction direction for use in AC prediction
*/
static inline int ff_vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
int a_avail, int c_avail,
int16_t **dc_val_ptr, int *dir_ptr)
{
int a, b, c, wrap, pred;
int16_t *dc_val;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int q1, q2 = 0;
int dqscale_index;
wrap = s->block_wrap[n];
dc_val = s->dc_val[0] + s->block_index[n];
/* B A
* C X
*/
c = dc_val[ - 1];
b = dc_val[ - 1 - wrap];
a = dc_val[ - wrap];
/* scale predictors if needed */
q1 = s->current_picture.qscale_table[mb_pos];
dqscale_index = s->y_dc_scale_table[q1] - 1;
if (dqscale_index < 0)
return 0;
if (c_avail && (n != 1 && n != 3)) {
q2 = s->current_picture.qscale_table[mb_pos - 1];
if (q2 && q2 != q1)
c = (c * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
}
if (a_avail && (n != 2 && n != 3)) {
q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
if (q2 && q2 != q1)
a = (a * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
}
if (a_avail && c_avail && (n != 3)) {
int off = mb_pos;
if (n != 1)
off--;
if (n != 2)
off -= s->mb_stride;
q2 = s->current_picture.qscale_table[off];
if (q2 && q2 != q1)
b = (b * s->y_dc_scale_table[q2] * ff_vc1_dqscale[dqscale_index] + 0x20000) >> 18;
}
if (a_avail && c_avail) {
if (abs(a - b) <= abs(b - c)) {
pred = c;
*dir_ptr = 1; // left
} else {
pred = a;
*dir_ptr = 0; // top
}
} else if (a_avail) {
pred = a;
*dir_ptr = 0; // top
} else if (c_avail) {
pred = c;
*dir_ptr = 1; // left
} else {
pred = 0;
*dir_ptr = 1; // left
}
/* update predictor */
*dc_val_ptr = &dc_val[0];
return pred;
}
/** @} */ // Block group
/**
* @name VC1 Macroblock-level functions in Simple/Main Profiles
* @see 7.1.4, p91 and 8.1.1.7, p(1)04
* @{
*/
static inline int vc1_coded_block_pred(MpegEncContext * s, int n,
uint8_t **coded_block_ptr)
{
int xy, wrap, pred, a, b, c;
xy = s->block_index[n];
wrap = s->b8_stride;
/* B C
* A X
*/
a = s->coded_block[xy - 1 ];
b = s->coded_block[xy - 1 - wrap];
c = s->coded_block[xy - wrap];
if (b == c) {
pred = a;
} else {
pred = c;
}
/* store value */
*coded_block_ptr = &s->coded_block[xy];
return pred;
}
/**
* Decode one AC coefficient
* @param v The VC1 context
* @param last Last coefficient
* @param skip How much zero coefficients to skip
* @param value Decoded AC coefficient value
* @param codingset set of VLC to decode data
* @see 8.1.3.4
*/
static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip,
int *value, int codingset)
{
GetBitContext *gb = &v->s.gb;
int index, escape, run = 0, level = 0, lst = 0;
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
if (index != ff_vc1_ac_sizes[codingset] - 1) {
run = vc1_index_decode_table[codingset][index][0];
level = vc1_index_decode_table[codingset][index][1];
lst = index >= vc1_last_decode_table[codingset] || get_bits_left(gb) < 0;
if (get_bits1(gb))
level = -level;
} else {
escape = decode210(gb);
if (escape != 2) {
index = get_vlc2(gb, ff_vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
run = vc1_index_decode_table[codingset][index][0];
level = vc1_index_decode_table[codingset][index][1];
lst = index >= vc1_last_decode_table[codingset];
if (escape == 0) {
if (lst)
level += vc1_last_delta_level_table[codingset][run];
else
level += vc1_delta_level_table[codingset][run];
} else {
if (lst)
run += vc1_last_delta_run_table[codingset][level] + 1;
else
run += vc1_delta_run_table[codingset][level] + 1;
}
if (get_bits1(gb))
level = -level;
} else {
int sign;
lst = get_bits1(gb);
if (v->s.esc3_level_length == 0) {
if (v->pq < 8 || v->dquantfrm) { // table 59
v->s.esc3_level_length = get_bits(gb, 3);
if (!v->s.esc3_level_length)
v->s.esc3_level_length = get_bits(gb, 2) + 8;
} else { // table 60
v->s.esc3_level_length = get_unary(gb, 1, 6) + 2;
}
v->s.esc3_run_length = 3 + get_bits(gb, 2);
}
run = get_bits(gb, v->s.esc3_run_length);
sign = get_bits1(gb);
level = get_bits(gb, v->s.esc3_level_length);
if (sign)
level = -level;
}
}
*last = lst;
*skip = run;
*value = level;
}
/** Decode intra block in intra frames - should be faster than decode_intra_block
* @param v VC1Context
* @param block block to decode
* @param[in] n subblock index
* @param coded are AC coeffs present or not
* @param codingset set of VLC to decode data
*/
static int vc1_decode_i_block(VC1Context *v, int16_t block[64], int n,
int coded, int codingset)
{
GetBitContext *gb = &v->s.gb;
MpegEncContext *s = &v->s;
int dc_pred_dir = 0; /* Direction of the DC prediction used */
int i;
int16_t *dc_val;
int16_t *ac_val, *ac_val2;
int dcdiff;
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
}
if (dcdiff < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
return -1;
}
if (dcdiff) {
if (dcdiff == 119 /* ESC index value */) {
/* TODO: Optimize */
if (v->pq == 1) dcdiff = get_bits(gb, 10);
else if (v->pq == 2) dcdiff = get_bits(gb, 9);
else dcdiff = get_bits(gb, 8);
} else {
if (v->pq == 1)
dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
else if (v->pq == 2)
dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
}
if (get_bits1(gb))
dcdiff = -dcdiff;
}
/* Prediction */
dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
*dc_val = dcdiff;
/* Store the quantized DC coeff, used for prediction */
if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
block[0] = dcdiff * s->c_dc_scale;
}
/* Skip ? */
if (!coded) {
goto not_coded;
}
// AC Decoding
i = 1;
{
int last = 0, skip, value;
const uint8_t *zz_table;
int scale;
int k;
scale = v->pq * 2 + v->halfpq;
if (v->s.ac_pred) {
if (!dc_pred_dir)
zz_table = v->zz_8x8[2];
else
zz_table = v->zz_8x8[3];
} else
zz_table = v->zz_8x8[1];
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
if (dc_pred_dir) // left
ac_val -= 16;
else // top
ac_val -= 16 * s->block_wrap[n];
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
i += skip;
if (i > 63)
break;
block[zz_table[i++]] = value;
}
/* apply AC prediction if needed */
if (s->ac_pred) {
if (dc_pred_dir) { // left
for (k = 1; k < 8; k++)
block[k << v->left_blk_sh] += ac_val[k];
} else { // top
for (k = 1; k < 8; k++)
block[k << v->top_blk_sh] += ac_val[k + 8];
}
}
/* save AC coeffs for further prediction */
for (k = 1; k < 8; k++) {
ac_val2[k] = block[k << v->left_blk_sh];
ac_val2[k + 8] = block[k << v->top_blk_sh];
}
/* scale AC coeffs */
for (k = 1; k < 64; k++)
if (block[k]) {
block[k] *= scale;
if (!v->pquantizer)
block[k] += (block[k] < 0) ? -v->pq : v->pq;
}
if (s->ac_pred) i = 63;
}
not_coded:
if (!coded) {
int k, scale;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
i = 0;
scale = v->pq * 2 + v->halfpq;
memset(ac_val2, 0, 16 * 2);
if (dc_pred_dir) { // left
ac_val -= 16;
if (s->ac_pred)
memcpy(ac_val2, ac_val, 8 * 2);
} else { // top
ac_val -= 16 * s->block_wrap[n];
if (s->ac_pred)
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
}
/* apply AC prediction if needed */
if (s->ac_pred) {
if (dc_pred_dir) { //left
for (k = 1; k < 8; k++) {
block[k << v->left_blk_sh] = ac_val[k] * scale;
if (!v->pquantizer && block[k << v->left_blk_sh])
block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -v->pq : v->pq;
}
} else { // top
for (k = 1; k < 8; k++) {
block[k << v->top_blk_sh] = ac_val[k + 8] * scale;
if (!v->pquantizer && block[k << v->top_blk_sh])
block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -v->pq : v->pq;
}
}
i = 63;
}
}
s->block_last_index[n] = i;
return 0;
}
/** Decode intra block in intra frames - should be faster than decode_intra_block
* @param v VC1Context
* @param block block to decode
* @param[in] n subblock number
* @param coded are AC coeffs present or not
* @param codingset set of VLC to decode data
* @param mquant quantizer value for this macroblock
*/
static int vc1_decode_i_block_adv(VC1Context *v, int16_t block[64], int n,
int coded, int codingset, int mquant)
{
GetBitContext *gb = &v->s.gb;
MpegEncContext *s = &v->s;
int dc_pred_dir = 0; /* Direction of the DC prediction used */
int i;
int16_t *dc_val;
int16_t *ac_val, *ac_val2;
int dcdiff;
int a_avail = v->a_avail, c_avail = v->c_avail;
int use_pred = s->ac_pred;
int scale;
int q1, q2 = 0;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
}
if (dcdiff < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
return -1;
}
if (dcdiff) {
if (dcdiff == 119 /* ESC index value */) {
/* TODO: Optimize */
if (mquant == 1) dcdiff = get_bits(gb, 10);
else if (mquant == 2) dcdiff = get_bits(gb, 9);
else dcdiff = get_bits(gb, 8);
} else {
if (mquant == 1)
dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
else if (mquant == 2)
dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
}
if (get_bits1(gb))
dcdiff = -dcdiff;
}
/* Prediction */
dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);
*dc_val = dcdiff;
/* Store the quantized DC coeff, used for prediction */
if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
block[0] = dcdiff * s->c_dc_scale;
}
//AC Decoding
i = 1;
/* check if AC is needed at all */
if (!a_avail && !c_avail)
use_pred = 0;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
scale = mquant * 2 + ((mquant == v->pq) ? v->halfpq : 0);
if (dc_pred_dir) // left
ac_val -= 16;
else // top
ac_val -= 16 * s->block_wrap[n];
q1 = s->current_picture.qscale_table[mb_pos];
if (dc_pred_dir && c_avail && mb_pos)
q2 = s->current_picture.qscale_table[mb_pos - 1];
if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
if (dc_pred_dir && n == 1)
q2 = q1;
if (!dc_pred_dir && n == 2)
q2 = q1;
if (n == 3)
q2 = q1;
if (coded) {
int last = 0, skip, value;
const uint8_t *zz_table;
int k;
if (v->s.ac_pred) {
if (!use_pred && v->fcm == ILACE_FRAME) {
zz_table = v->zzi_8x8;
} else {
if (!dc_pred_dir) // top
zz_table = v->zz_8x8[2];
else // left
zz_table = v->zz_8x8[3];
}
} else {
if (v->fcm != ILACE_FRAME)
zz_table = v->zz_8x8[1];
else
zz_table = v->zzi_8x8;
}
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
i += skip;
if (i > 63)
break;
block[zz_table[i++]] = value;
}
/* apply AC prediction if needed */
if (use_pred) {
/* scale predictors if needed*/
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
if (dc_pred_dir) { // left
for (k = 1; k < 8; k++)
block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
} else { // top
for (k = 1; k < 8; k++)
block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
} else {
if (dc_pred_dir) { //left
for (k = 1; k < 8; k++)
block[k << v->left_blk_sh] += ac_val[k];
} else { //top
for (k = 1; k < 8; k++)
block[k << v->top_blk_sh] += ac_val[k + 8];
}
}
}
/* save AC coeffs for further prediction */
for (k = 1; k < 8; k++) {
ac_val2[k ] = block[k << v->left_blk_sh];
ac_val2[k + 8] = block[k << v->top_blk_sh];
}
/* scale AC coeffs */
for (k = 1; k < 64; k++)
if (block[k]) {
block[k] *= scale;
if (!v->pquantizer)
block[k] += (block[k] < 0) ? -mquant : mquant;
}
if (use_pred) i = 63;
} else { // no AC coeffs
int k;
memset(ac_val2, 0, 16 * 2);
if (dc_pred_dir) { // left
if (use_pred) {
memcpy(ac_val2, ac_val, 8 * 2);
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
for (k = 1; k < 8; k++)
ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
}
} else { // top
if (use_pred) {
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
for (k = 1; k < 8; k++)
ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_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 << v->left_blk_sh] = ac_val2[k] * scale;
if (!v->pquantizer && block[k << v->left_blk_sh])
block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
}
} else { // top
for (k = 1; k < 8; k++) {
block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
if (!v->pquantizer && block[k << v->top_blk_sh])
block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
}
}
i = 63;
}
}
s->block_last_index[n] = i;
return 0;
}
/** Decode intra block in inter frames - more generic version than vc1_decode_i_block
* @param v VC1Context
* @param block block to decode
* @param[in] n subblock index
* @param coded are AC coeffs present or not
* @param mquant block quantizer
* @param codingset set of VLC to decode data
*/
static int vc1_decode_intra_block(VC1Context *v, int16_t block[64], int n,
int coded, int mquant, int codingset)
{
GetBitContext *gb = &v->s.gb;
MpegEncContext *s = &v->s;
int dc_pred_dir = 0; /* Direction of the DC prediction used */
int i;
int16_t *dc_val;
int16_t *ac_val, *ac_val2;
int dcdiff;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int a_avail = v->a_avail, c_avail = v->c_avail;
int use_pred = s->ac_pred;
int scale;
int q1, q2 = 0;
s->bdsp.clear_block(block);
/* XXX: Guard against dumb values of mquant */
mquant = (mquant < 1) ? 0 : ((mquant > 31) ? 31 : mquant);
/* Set DC scale - y and c use the same */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
}
if (dcdiff < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
return -1;
}
if (dcdiff) {
if (dcdiff == 119 /* ESC index value */) {
/* TODO: Optimize */
if (mquant == 1) dcdiff = get_bits(gb, 10);
else if (mquant == 2) dcdiff = get_bits(gb, 9);
else dcdiff = get_bits(gb, 8);
} else {
if (mquant == 1)
dcdiff = (dcdiff << 2) + get_bits(gb, 2) - 3;
else if (mquant == 2)
dcdiff = (dcdiff << 1) + get_bits1(gb) - 1;
}
if (get_bits1(gb))
dcdiff = -dcdiff;
}
/* Prediction */
dcdiff += ff_vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
*dc_val = dcdiff;
/* Store the quantized DC coeff, used for prediction */
if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
block[0] = dcdiff * s->c_dc_scale;
}
//AC Decoding
i = 1;
/* check if AC is needed at all and adjust direction if needed */
if (!a_avail) dc_pred_dir = 1;
if (!c_avail) dc_pred_dir = 0;
if (!a_avail && !c_avail) use_pred = 0;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
scale = mquant * 2 + v->halfpq;
if (dc_pred_dir) //left
ac_val -= 16;
else //top
ac_val -= 16 * s->block_wrap[n];
q1 = s->current_picture.qscale_table[mb_pos];
if (dc_pred_dir && c_avail && mb_pos)
q2 = s->current_picture.qscale_table[mb_pos - 1];
if (!dc_pred_dir && a_avail && mb_pos >= s->mb_stride)
q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];
if (dc_pred_dir && n == 1)
q2 = q1;
if (!dc_pred_dir && n == 2)
q2 = q1;
if (n == 3) q2 = q1;
if (coded) {
int last = 0, skip, value;
int k;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
i += skip;
if (i > 63)
break;
if (v->fcm == PROGRESSIVE)
block[v->zz_8x8[0][i++]] = value;
else {
if (use_pred && (v->fcm == ILACE_FRAME)) {
if (!dc_pred_dir) // top
block[v->zz_8x8[2][i++]] = value;
else // left
block[v->zz_8x8[3][i++]] = value;
} else {
block[v->zzi_8x8[i++]] = value;
}
}
}
/* apply AC prediction if needed */
if (use_pred) {
/* scale predictors if needed*/
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
if (dc_pred_dir) { // left
for (k = 1; k < 8; k++)
block[k << v->left_blk_sh] += (ac_val[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
} else { //top
for (k = 1; k < 8; k++)
block[k << v->top_blk_sh] += (ac_val[k + 8] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
} else {
if (dc_pred_dir) { // left
for (k = 1; k < 8; k++)
block[k << v->left_blk_sh] += ac_val[k];
} else { // top
for (k = 1; k < 8; k++)
block[k << v->top_blk_sh] += ac_val[k + 8];
}
}
}
/* save AC coeffs for further prediction */
for (k = 1; k < 8; k++) {
ac_val2[k ] = block[k << v->left_blk_sh];
ac_val2[k + 8] = block[k << v->top_blk_sh];
}
/* scale AC coeffs */
for (k = 1; k < 64; k++)
if (block[k]) {
block[k] *= scale;
if (!v->pquantizer)
block[k] += (block[k] < 0) ? -mquant : mquant;
}
if (use_pred) i = 63;
} else { // no AC coeffs
int k;
memset(ac_val2, 0, 16 * 2);
if (dc_pred_dir) { // left
if (use_pred) {
memcpy(ac_val2, ac_val, 8 * 2);
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
for (k = 1; k < 8; k++)
ac_val2[k] = (ac_val2[k] * q2 * ff_vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
}
} else { // top
if (use_pred) {
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
if (q2 && q1 != q2) {
q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;
q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;
if (q1 < 1)
return AVERROR_INVALIDDATA;
for (k = 1; k < 8; k++)
ac_val2[k + 8] = (ac_val2[k + 8] * q2 * ff_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 << v->left_blk_sh] = ac_val2[k] * scale;
if (!v->pquantizer && block[k << v->left_blk_sh])
block[k << v->left_blk_sh] += (block[k << v->left_blk_sh] < 0) ? -mquant : mquant;
}
} else { // top
for (k = 1; k < 8; k++) {
block[k << v->top_blk_sh] = ac_val2[k + 8] * scale;
if (!v->pquantizer && block[k << v->top_blk_sh])
block[k << v->top_blk_sh] += (block[k << v->top_blk_sh] < 0) ? -mquant : mquant;
}
}
i = 63;
}
}
s->block_last_index[n] = i;
return 0;
}
/** Decode P block
*/
static int vc1_decode_p_block(VC1Context *v, int16_t block[64], int n,
int mquant, int ttmb, int first_block,
uint8_t *dst, int linesize, int skip_block,
int *ttmb_out)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int subblkpat = 0;
int scale, off, idx, last, skip, value;
int ttblk = ttmb & 7;
int pat = 0;
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)];
}
if (ttblk == TT_4X4) {
subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
}
if ((ttblk != TT_8X8 && ttblk != TT_4X4)
&& ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
|| (!v->res_rtm_flag && !first_block))) {
subblkpat = decode012(gb);
if (subblkpat)
subblkpat ^= 3; // swap decoded pattern bits
if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM)
ttblk = TT_8X4;
if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT)
ttblk = TT_4X8;
}
scale = 2 * mquant + ((v->pq == mquant) ? v->halfpq : 0);
// convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
if (ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
subblkpat = 2 - (ttblk == TT_8X4_TOP);
ttblk = TT_8X4;
}
if (ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
subblkpat = 2 - (ttblk == TT_4X8_LEFT);
ttblk = TT_4X8;
}
switch (ttblk) {
case TT_8X8:
pat = 0xF;
i = 0;
last = 0;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if (i > 63)
break;
if (!v->fcm)
idx = v->zz_8x8[0][i++];
else
idx = v->zzi_8x8[i++];
block[idx] = value * scale;
if (!v->pquantizer)
block[idx] += (block[idx] < 0) ? -mquant : mquant;
}
if (!skip_block) {
if (i == 1)
v->vc1dsp.vc1_inv_trans_8x8_dc(dst, linesize, block);
else {
v->vc1dsp.vc1_inv_trans_8x8(block);
s->idsp.add_pixels_clamped(block, dst, linesize);
}
}
break;
case TT_4X4:
pat = ~subblkpat & 0xF;
for (j = 0; j < 4; j++) {
last = subblkpat & (1 << (3 - j));
i = 0;
off = (j & 1) * 4 + (j & 2) * 16;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if (i > 15)
break;
if (!v->fcm)
idx = ff_vc1_simple_progressive_4x4_zz[i++];
else
idx = ff_vc1_adv_interlaced_4x4_zz[i++];
block[idx + off] = value * scale;
if (!v->pquantizer)
block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;
}
if (!(subblkpat & (1 << (3 - j))) && !skip_block) {
if (i == 1)
v->vc1dsp.vc1_inv_trans_4x4_dc(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
else
v->vc1dsp.vc1_inv_trans_4x4(dst + (j & 1) * 4 + (j & 2) * 2 * linesize, linesize, block + off);
}
}
break;
case TT_8X4:
pat = ~((subblkpat & 2) * 6 + (subblkpat & 1) * 3) & 0xF;
for (j = 0; j < 2; j++) {
last = subblkpat & (1 << (1 - j));
i = 0;
off = j * 32;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if (i > 31)
break;
if (!v->fcm)
idx = v->zz_8x4[i++] + off;
else
idx = ff_vc1_adv_interlaced_8x4_zz[i++] + off;
block[idx] = value * scale;
if (!v->pquantizer)
block[idx] += (block[idx] < 0) ? -mquant : mquant;
}
if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
if (i == 1)
v->vc1dsp.vc1_inv_trans_8x4_dc(dst + j * 4 * linesize, linesize, block + off);
else
v->vc1dsp.vc1_inv_trans_8x4(dst + j * 4 * linesize, linesize, block + off);
}
}
break;
case TT_4X8:
pat = ~(subblkpat * 5) & 0xF;
for (j = 0; j < 2; j++) {
last = subblkpat & (1 << (1 - j));
i = 0;
off = j * 4;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if (i > 31)
break;
if (!v->fcm)
idx = v->zz_4x8[i++] + off;
else
idx = ff_vc1_adv_interlaced_4x8_zz[i++] + off;
block[idx] = value * scale;
if (!v->pquantizer)
block[idx] += (block[idx] < 0) ? -mquant : mquant;
}
if (!(subblkpat & (1 << (1 - j))) && !skip_block) {
if (i == 1)
v->vc1dsp.vc1_inv_trans_4x8_dc(dst + j * 4, linesize, block + off);
else
v->vc1dsp.vc1_inv_trans_4x8(dst + j*4, linesize, block + off);
}
}
break;
}
if (ttmb_out)
*ttmb_out |= ttblk << (n * 4);
return pat;
}
/** @} */ // Macroblock group
static const int size_table [6] = { 0, 2, 3, 4, 5, 8 };
static const int offset_table[6] = { 0, 1, 3, 7, 15, 31 };
/** Decode one P-frame MB
*/
static int vc1_decode_p_mb(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mb_has_coeffs = 1; /* last_flag */
int dmv_x, dmv_y; /* Differential MV components */
int index, index1; /* LUT indexes */
int val, sign; /* temp values */
int first_block = 1;
int dst_idx, off;
int skipped, fourmv;
int block_cbp = 0, pat, block_tt = 0, block_intra = 0;
mquant = v->pq; /* lossy initialization */
if (v->mv_type_is_raw)
fourmv = get_bits1(gb);
else
fourmv = v->mv_type_mb_plane[mb_pos];
if (v->skip_is_raw)
skipped = get_bits1(gb);
else
skipped = v->s.mbskip_table[mb_pos];
if (!fourmv) { /* 1MV mode */
if (!skipped) {
GET_MVDATA(dmv_x, dmv_y);
if (s->mb_intra) {
s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
}
s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
/* FIXME Set DC val for inter block ? */
if (s->mb_intra && !mb_has_coeffs) {
GET_MQUANT();
s->ac_pred = get_bits1(gb);
cbp = 0;
} 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);
GET_MQUANT();
} else {
mquant = v->pq;
cbp = 0;
}
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);
if (!s->mb_intra) ff_vc1_mc_1mv(v, 0);
dst_idx = 0;
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
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->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[i][j] <<= 1;
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
i & 4 ? s->uvlinesize
: s->linesize);
if (v->pq >= 9 && v->overlap) {
if (v->c_avail)
v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
if (v->a_avail)
v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
}
block_cbp |= 0xF << (i << 2);
block_intra |= 1 << i;
} else if (val) {
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block,
s->dest[dst_idx] + off, (i & 4) ? s->uvlinesize : s->linesize,
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
block_cbp |= pat << (i << 2);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
} else { // skipped
s->mb_intra = 0;
for (i = 0; i < 6; i++) {
v->mb_type[0][s->block_index[i]] = 0;
s->dc_val[0][s->block_index[i]] = 0;
}
s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
s->current_picture.qscale_table[mb_pos] = 0;
ff_vc1_pred_mv(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0, 0);
ff_vc1_mc_1mv(v, 0);
}
} else { // 4MV mode
if (!skipped /* unskipped MB */) {
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 < 6; i++) {
val = ((cbp >> (5 - i)) & 1);
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);
}
ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
if (!s->mb_intra)
ff_vc1_mc_4mv_luma(v, i, 0, 0);
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 (i == 4)
ff_vc1_mc_4mv_chroma(v, 0);
v->mb_type[0][s->block_index[i]] = is_intra[i];
if (!coded_inter)
coded_inter = !is_intra[i] & is_coded[i];
}
// if there are no coded blocks then don't do anything more
dst_idx = 0;
if (!intra_count && !coded_inter)
goto end;
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 (((!s->first_slice_line || (i == 2 || i == 3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])
|| ((s->mb_x || (i == 1 || i == 3)) && v->mb_type[0][s->block_index[i] - 1])) {
intrapred = 1;
break;
}
}
if (intrapred)
s->ac_pred = get_bits1(gb);
else
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);
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->first_slice_line)
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, s->block[i], i, is_coded[i], mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[i][j] <<= 1;
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize
: s->linesize);
if (v->pq >= 9 && v->overlap) {
if (v->c_avail)
v->vc1dsp.vc1_h_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
if (v->a_avail)
v->vc1dsp.vc1_v_overlap(s->dest[dst_idx] + off, i & 4 ? s->uvlinesize : s->linesize);
}
block_cbp |= 0xF << (i << 2);
block_intra |= 1 << i;
} else if (is_coded[i]) {
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : s->linesize,
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
&block_tt);
block_cbp |= pat << (i << 2);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
} else { // skipped MB
s->mb_intra = 0;
s->current_picture.qscale_table[mb_pos] = 0;
for (i = 0; i < 6; i++) {
v->mb_type[0][s->block_index[i]] = 0;
s->dc_val[0][s->block_index[i]] = 0;
}
for (i = 0; i < 4; i++) {
ff_vc1_pred_mv(v, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0], 0, 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
}
ff_vc1_mc_4mv_chroma(v, 0);
s->current_picture.qscale_table[mb_pos] = 0;
}
}
end:
v->cbp[s->mb_x] = block_cbp;
v->ttblk[s->mb_x] = block_tt;
v->is_intra[s->mb_x] = block_intra;
return 0;
}
/* Decode one macroblock in an interlaced frame p picture */
static int vc1_decode_p_mb_intfr(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp = 0; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mb_has_coeffs = 1; /* last_flag */
int dmv_x, dmv_y; /* Differential MV components */
int val; /* temp value */
int first_block = 1;
int dst_idx, off;
int skipped, fourmv = 0, twomv = 0;
int block_cbp = 0, pat, block_tt = 0;
int idx_mbmode = 0, mvbp;
int stride_y, fieldtx;
mquant = v->pq; /* Loosy initialization */
if (v->skip_is_raw)
skipped = get_bits1(gb);
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]) {
/* store the motion vector type in a flag (useful later) */
case MV_PMODE_INTFR_4MV:
fourmv = 1;
v->blk_mv_type[s->block_index[0]] = 0;
v->blk_mv_type[s->block_index[1]] = 0;
v->blk_mv_type[s->block_index[2]] = 0;
v->blk_mv_type[s->block_index[3]] = 0;
break;
case MV_PMODE_INTFR_4MV_FIELD:
fourmv = 1;
v->blk_mv_type[s->block_index[0]] = 1;
v->blk_mv_type[s->block_index[1]] = 1;
v->blk_mv_type[s->block_index[2]] = 1;
v->blk_mv_type[s->block_index[3]] = 1;
break;
case 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;
v->blk_mv_type[s->block_index[2]] = 1;
v->blk_mv_type[s->block_index[3]] = 1;
break;
case MV_PMODE_INTFR_1MV:
v->blk_mv_type[s->block_index[0]] = 0;
v->blk_mv_type[s->block_index[1]] = 0;
v->blk_mv_type[s->block_index[2]] = 0;
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
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;
}
v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
s->mb_intra = 1;
s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
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);
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* Set DC scale - y and c use the same (not sure if necessary here) */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
v->mb_type[0][s->block_index[i]] = 1;
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (i == 2 || i == 3 || !s->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (i < 4) {
stride_y = s->linesize << fieldtx;
off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
} else {
stride_y = s->uvlinesize;
off = 0;
}
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
stride_y);
//TODO: loop filter
}
} 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);
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);
} 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);
}
}
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];
/* for all motion vector read MVDATA and motion compensate each block */
dst_idx = 0;
if (fourmv) {
mvbp = v->fourmvbp;
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x = dmv_y = 0;
val = ((mvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
} else if (i == 4) {
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
}
}
} else if (twomv) {
mvbp = v->twomvbp;
dmv_x = dmv_y = 0;
if (mvbp & 2) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_4mv_luma(v, 0, 0, 0);
ff_vc1_mc_4mv_luma(v, 1, 0, 0);
dmv_x = dmv_y = 0;
if (mvbp & 1) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_4mv_luma(v, 2, 0, 0);
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];
dmv_x = dmv_y = 0;
if (mvbp) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
}
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_1mv(v, 0);
}
if (cbp)
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);
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (!fieldtx)
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
else
off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
if (val) {
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
block_cbp |= pat << (i << 2);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
}
} else { // skipped
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;
s->dc_val[0][s->block_index[i]] = 0;
}
s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
s->current_picture.qscale_table[mb_pos] = 0;
v->blk_mv_type[s->block_index[0]] = 0;
v->blk_mv_type[s->block_index[1]] = 0;
v->blk_mv_type[s->block_index[2]] = 0;
v->blk_mv_type[s->block_index[3]] = 0;
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_1mv(v, 0);
}
if (s->mb_x == s->mb_width - 1)
memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0])*s->mb_stride);
return 0;
}
static int vc1_decode_p_mb_intfi(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp = 0; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mb_has_coeffs = 1; /* last_flag */
int dmv_x, dmv_y; /* Differential MV components */
int val; /* temp values */
int first_block = 1;
int dst_idx, off;
int pred_flag;
int block_cbp = 0, pat, block_tt = 0;
int idx_mbmode = 0;
mquant = v->pq; /* Loosy initialization */
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, 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;
s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* Set DC scale - y and c use the same (not sure if necessary here) */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
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);
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
v->mb_type[0][s->block_index[i]] = 1;
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (i == 2 || i == 3 || !s->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize
: s->linesize);
// TODO: loop filter
}
} else {
s->mb_intra = v->is_intra[s->mb_x] = 0;
s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
if (idx_mbmode <= 5) { // 1-MV
dmv_x = dmv_y = pred_flag = 0;
if (idx_mbmode & 1) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
}
ff_vc1_pred_mv(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
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);
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x = dmv_y = pred_flag = 0;
val = ((v->fourmvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag);
}
ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0);
ff_vc1_mc_4mv_luma(v, i, 0, 0);
} else if (i == 4)
ff_vc1_mc_4mv_chroma(v, 0);
}
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);
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);
}
dst_idx = 0;
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
if (val) {
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : s->linesize,
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY),
&block_tt);
block_cbp |= pat << (i << 2);
if (!v->ttmbf && ttmb < 8) ttmb = -1;
first_block = 0;
}
}
}
if (s->mb_x == s->mb_width - 1)
memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
return 0;
}
/** Decode one B-frame MB (in Main profile)
*/
static void vc1_decode_b_mb(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp = 0; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mb_has_coeffs = 0; /* last_flag */
int index, index1; /* LUT indexes */
int val, sign; /* temp values */
int first_block = 1;
int dst_idx, off;
int skipped, direct;
int dmv_x[2], dmv_y[2];
int bmvtype = BMV_TYPE_BACKWARD;
mquant = v->pq; /* lossy initialization */
s->mb_intra = 0;
if (v->dmb_is_raw)
direct = get_bits1(gb);
else
direct = v->direct_mb_plane[mb_pos];
if (v->skip_is_raw)
skipped = get_bits1(gb);
else
skipped = v->s.mbskip_table[mb_pos];
dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
for (i = 0; i < 6; i++) {
v->mb_type[0][s->block_index[i]] = 0;
s->dc_val[0][s->block_index[i]] = 0;
}
s->current_picture.qscale_table[mb_pos] = 0;
if (!direct) {
if (!skipped) {
GET_MVDATA(dmv_x[0], dmv_y[0]);
dmv_x[1] = dmv_x[0];
dmv_y[1] = dmv_y[0];
}
if (skipped || !s->mb_intra) {
bmvtype = decode012(gb);
switch (bmvtype) {
case 0:
bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
break;
case 1:
bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
break;
case 2:
bmvtype = BMV_TYPE_INTERPOLATED;
dmv_x[0] = dmv_y[0] = 0;
}
}
}
for (i = 0; i < 6; i++)
v->mb_type[0][s->block_index[i]] = s->mb_intra;
if (skipped) {
if (direct)
bmvtype = BMV_TYPE_INTERPOLATED;
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
return;
}
if (direct) {
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, 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);
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);
} else {
if (!mb_has_coeffs && !s->mb_intra) {
/* no coded blocks - effectively skipped */
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
return;
}
if (s->mb_intra && !mb_has_coeffs) {
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
s->ac_pred = get_bits1(gb);
cbp = 0;
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
} else {
if (bmvtype == BMV_TYPE_INTERPOLATED) {
GET_MVDATA(dmv_x[0], dmv_y[0]);
if (!mb_has_coeffs) {
/* interpolated skipped block */
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
return;
}
}
ff_vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);
if (!s->mb_intra) {
vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);
}
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);
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);
}
}
dst_idx = 0;
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
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->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[i][j] <<= 1;
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
i & 4 ? s->uvlinesize
: s->linesize);
} else if (val) {
vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : s->linesize,
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
}
/** Decode one B-frame MB (in interlaced field B picture)
*/
static void vc1_decode_b_mb_intfi(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp = 0; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mb_has_coeffs = 0; /* last_flag */
int val; /* temp value */
int first_block = 1;
int dst_idx, off;
int fwd;
int dmv_x[2], dmv_y[2], pred_flag[2];
int bmvtype = BMV_TYPE_BACKWARD;
int idx_mbmode, interpmvp;
mquant = v->pq; /* Loosy initialization */
s->mb_intra = 0;
idx_mbmode = get_vlc2(gb, v->mbmode_vlc->table, 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;
s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* Set DC scale - y and c use the same (not sure if necessary here) */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
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);
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
v->mb_type[0][s->block_index[i]] = 1;
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (i == 2 || i == 3 || !s->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if ((i > 3) && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[i][j] <<= 1;
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize
: s->linesize);
// TODO: yet to perform loop filter
}
} else {
s->mb_intra = v->is_intra[s->mb_x] = 0;
s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_16x16;
for (i = 0; i < 6; i++) v->mb_type[0][s->block_index[i]] = 0;
if (v->fmb_is_raw)
fwd = v->forward_mb_plane[mb_pos] = get_bits1(gb);
else
fwd = v->forward_mb_plane[mb_pos];
if (idx_mbmode <= 5) { // 1-MV
dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;
pred_flag[0] = pred_flag[1] = 0;
if (fwd)
bmvtype = BMV_TYPE_FORWARD;
else {
bmvtype = decode012(gb);
switch (bmvtype) {
case 0:
bmvtype = BMV_TYPE_BACKWARD;
break;
case 1:
bmvtype = BMV_TYPE_DIRECT;
break;
case 2:
bmvtype = BMV_TYPE_INTERPOLATED;
interpmvp = get_bits1(gb);
}
}
v->bmvtype = bmvtype;
if (bmvtype != BMV_TYPE_DIRECT && idx_mbmode & 1) {
get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], &dmv_y[bmvtype == BMV_TYPE_BACKWARD], &pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
}
if (bmvtype == BMV_TYPE_INTERPOLATED && interpmvp) {
get_mvdata_interlaced(v, &dmv_x[1], &dmv_y[1], &pred_flag[1]);
}
if (bmvtype == BMV_TYPE_DIRECT) {
dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
dmv_x[1] = dmv_y[1] = pred_flag[0] = 0;
}
ff_vc1_pred_b_mv_intfi(v, 0, dmv_x, dmv_y, 1, pred_flag);
vc1_b_mc(v, dmv_x, dmv_y, (bmvtype == BMV_TYPE_DIRECT), bmvtype);
mb_has_coeffs = !(idx_mbmode & 2);
} else { // 4-MV
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);
for (i = 0; i < 6; i++) {
if (i < 4) {
dmv_x[0] = dmv_y[0] = pred_flag[0] = 0;
dmv_x[1] = dmv_y[1] = pred_flag[1] = 0;
val = ((v->fourmvbp >> (3 - i)) & 1);
if (val) {
get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD],
&dmv_y[bmvtype == BMV_TYPE_BACKWARD],
&pred_flag[bmvtype == BMV_TYPE_BACKWARD]);
}
ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag);
ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0);
} else if (i == 4)
ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD);
}
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);
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);
}
dst_idx = 0;
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
off = (i & 4) ? 0 : (i & 1) * 8 + (i & 2) * 4 * s->linesize;
if (val) {
vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : s->linesize,
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), NULL);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
}
}
/** Decode one B-frame MB (in interlaced frame B picture)
*/
static int vc1_decode_b_mb_intfr(VC1Context *v)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp = 0; /* cbp decoding stuff */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttfrm; /* MB Transform type */
int mvsw = 0; /* motion vector switch */
int mb_has_coeffs = 1; /* last_flag */
int dmv_x, dmv_y; /* Differential MV components */
int val; /* temp value */
int first_block = 1;
int dst_idx, off;
int skipped, direct, twomv = 0;
int block_cbp = 0, pat, block_tt = 0;
int idx_mbmode = 0, mvbp;
int stride_y, fieldtx;
int bmvtype = BMV_TYPE_BACKWARD;
int dir, dir2;
mquant = v->pq; /* Lossy initialization */
s->mb_intra = 0;
if (v->skip_is_raw)
skipped = get_bits1(gb);
else
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) {
twomv = 1;
v->blk_mv_type[s->block_index[0]] = 1;
v->blk_mv_type[s->block_index[1]] = 1;
v->blk_mv_type[s->block_index[2]] = 1;
v->blk_mv_type[s->block_index[3]] = 1;
} else {
v->blk_mv_type[s->block_index[0]] = 0;
v->blk_mv_type[s->block_index[1]] = 0;
v->blk_mv_type[s->block_index[2]] = 0;
v->blk_mv_type[s->block_index[3]] = 0;
}
}
if (v->dmb_is_raw)
direct = get_bits1(gb);
else
direct = v->direct_mb_plane[mb_pos];
if (direct) {
s->mv[0][0][0] = s->current_picture.motion_val[0][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 0, s->quarter_sample);
s->mv[0][0][1] = s->current_picture.motion_val[0][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 0, s->quarter_sample);
s->mv[1][0][0] = s->current_picture.motion_val[1][s->block_index[0]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][0], v->bfraction, 1, s->quarter_sample);
s->mv[1][0][1] = s->current_picture.motion_val[1][s->block_index[0]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[0]][1], v->bfraction, 1, s->quarter_sample);
if (twomv) {
s->mv[0][2][0] = s->current_picture.motion_val[0][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 0, s->quarter_sample);
s->mv[0][2][1] = s->current_picture.motion_val[0][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 0, s->quarter_sample);
s->mv[1][2][0] = s->current_picture.motion_val[1][s->block_index[2]][0] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][0], v->bfraction, 1, s->quarter_sample);
s->mv[1][2][1] = s->current_picture.motion_val[1][s->block_index[2]][1] = scale_mv(s->next_picture.motion_val[1][s->block_index[2]][1], v->bfraction, 1, s->quarter_sample);
for (i = 1; i < 4; i += 2) {
s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][i-1][0];
s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][i-1][1];
s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][i-1][0];
s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][i-1][1];
}
} else {
for (i = 1; i < 4; i++) {
s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0] = s->mv[0][0][0];
s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1] = s->mv[0][0][1];
s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = s->mv[1][0][0];
s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = s->mv[1][0][1];
}
}
}
if (ff_vc1_mbmode_intfrp[0][idx_mbmode][0] == 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;
s->mv[1][i][0] = s->current_picture.motion_val[1][s->block_index[i]][0] = 0;
s->mv[1][i][1] = s->current_picture.motion_val[1][s->block_index[i]][1] = 0;
}
v->is_intra[s->mb_x] = 0x3f; // Set the bitfield to all 1.
s->mb_intra = 1;
s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
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);
v->s.ac_pred = v->acpred_plane[mb_pos] = get_bits1(gb);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* Set DC scale - y and c use the same (not sure if necessary here) */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
dst_idx = 0;
for (i = 0; i < 6; i++) {
v->a_avail = v->c_avail = 0;
v->mb_type[0][s->block_index[i]] = 1;
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (i == 2 || i == 3 || !s->first_slice_line)
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, s->block[i], i, val, mquant,
(i & 4) ? v->codingset2 : v->codingset);
if (i > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
if (i < 4) {
stride_y = s->linesize << fieldtx;
off = (fieldtx) ? ((i & 1) * 8) + ((i & 2) >> 1) * s->linesize : (i & 1) * 8 + 4 * (i & 2) * s->linesize;
} else {
stride_y = s->uvlinesize;
off = 0;
}
s->idsp.put_signed_pixels_clamped(s->block[i],
s->dest[dst_idx] + off,
stride_y);
}
} else {
s->mb_intra = v->is_intra[s->mb_x] = 0;
if (!direct) {
if (skipped || !s->mb_intra) {
bmvtype = decode012(gb);
switch (bmvtype) {
case 0:
bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;
break;
case 1:
bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;
break;
case 2:
bmvtype = BMV_TYPE_INTERPOLATED;
}
}
if (twomv && bmvtype != BMV_TYPE_INTERPOLATED)
mvsw = get_bits1(gb);
}
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);
if (!direct) {
if (bmvtype == BMV_TYPE_INTERPOLATED && twomv) {
v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, 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);
}
}
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];
/* for all motion vector read MVDATA and motion compensate each block */
dst_idx = 0;
if (direct) {
if (twomv) {
for (i = 0; i < 4; i++) {
ff_vc1_mc_4mv_luma(v, i, 0, 0);
ff_vc1_mc_4mv_luma(v, i, 1, 1);
}
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
} else {
ff_vc1_mc_1mv(v, 0);
ff_vc1_interp_mc(v);
}
} else if (twomv && bmvtype == BMV_TYPE_INTERPOLATED) {
mvbp = v->fourmvbp;
for (i = 0; i < 4; i++) {
dir = i==1 || i==3;
dmv_x = dmv_y = 0;
val = ((mvbp >> (3 - i)) & 1);
if (val)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
j = i > 1 ? 2 : 0;
ff_vc1_pred_mv_intfr(v, j, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
ff_vc1_mc_4mv_luma(v, j, dir, dir);
ff_vc1_mc_4mv_luma(v, j+1, dir, dir);
}
ff_vc1_mc_4mv_chroma4(v, 0, 0, 0);
ff_vc1_mc_4mv_chroma4(v, 1, 1, 1);
} else if (bmvtype == BMV_TYPE_INTERPOLATED) {
mvbp = v->twomvbp;
dmv_x = dmv_y = 0;
if (mvbp & 2)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_mc_1mv(v, 0);
dmv_x = dmv_y = 0;
if (mvbp & 1)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], 1);
ff_vc1_interp_mc(v);
} else if (twomv) {
dir = bmvtype == BMV_TYPE_BACKWARD;
dir2 = dir;
if (mvsw)
dir2 = !dir;
mvbp = v->twomvbp;
dmv_x = dmv_y = 0;
if (mvbp & 2)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir);
dmv_x = dmv_y = 0;
if (mvbp & 1)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, 2, dmv_x, dmv_y, 2, v->range_x, v->range_y, v->mb_type[0], dir2);
if (mvsw) {
for (i = 0; i < 2; i++) {
s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
}
} else {
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
ff_vc1_pred_mv_intfr(v, 2, 0, 0, 2, v->range_x, v->range_y, v->mb_type[0], !dir);
}
ff_vc1_mc_4mv_luma(v, 0, dir, 0);
ff_vc1_mc_4mv_luma(v, 1, dir, 0);
ff_vc1_mc_4mv_luma(v, 2, dir2, 0);
ff_vc1_mc_4mv_luma(v, 3, dir2, 0);
ff_vc1_mc_4mv_chroma4(v, dir, dir2, 0);
} else {
dir = bmvtype == BMV_TYPE_BACKWARD;
mvbp = ff_vc1_mbmode_intfrp[0][idx_mbmode][2];
dmv_x = dmv_y = 0;
if (mvbp)
get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0);
ff_vc1_pred_mv_intfr(v, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0], dir);
v->blk_mv_type[s->block_index[0]] = 1;
v->blk_mv_type[s->block_index[1]] = 1;
v->blk_mv_type[s->block_index[2]] = 1;
v->blk_mv_type[s->block_index[3]] = 1;
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
for (i = 0; i < 2; i++) {
s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
}
ff_vc1_mc_1mv(v, dir);
}
if (cbp)
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);
for (i = 0; i < 6; i++) {
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
if (!fieldtx)
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
else
off = (i & 4) ? 0 : ((i & 1) * 8 + ((i > 1) * s->linesize));
if (val) {
pat = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb,
first_block, s->dest[dst_idx] + off,
(i & 4) ? s->uvlinesize : (s->linesize << fieldtx),
(i & 4) && (s->avctx->flags & AV_CODEC_FLAG_GRAY), &block_tt);
block_cbp |= pat << (i << 2);
if (!v->ttmbf && ttmb < 8)
ttmb = -1;
first_block = 0;
}
}
} else { // skipped
dir = 0;
for (i = 0; i < 6; i++) {
v->mb_type[0][s->block_index[i]] = 0;
s->dc_val[0][s->block_index[i]] = 0;
}
s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
s->current_picture.qscale_table[mb_pos] = 0;
v->blk_mv_type[s->block_index[0]] = 0;
v->blk_mv_type[s->block_index[1]] = 0;
v->blk_mv_type[s->block_index[2]] = 0;
v->blk_mv_type[s->block_index[3]] = 0;
if (!direct) {
if (bmvtype == BMV_TYPE_INTERPOLATED) {
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 0);
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], 1);
} else {
dir = bmvtype == BMV_TYPE_BACKWARD;
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0], dir);
if (mvsw) {
int dir2 = dir;
if (mvsw)
dir2 = !dir;
for (i = 0; i < 2; i++) {
s->mv[dir][i+2][0] = s->mv[dir][i][0] = s->current_picture.motion_val[dir][s->block_index[i+2]][0] = s->current_picture.motion_val[dir][s->block_index[i]][0];
s->mv[dir][i+2][1] = s->mv[dir][i][1] = s->current_picture.motion_val[dir][s->block_index[i+2]][1] = s->current_picture.motion_val[dir][s->block_index[i]][1];
s->mv[dir2][i+2][0] = s->mv[dir2][i][0] = s->current_picture.motion_val[dir2][s->block_index[i]][0] = s->current_picture.motion_val[dir2][s->block_index[i+2]][0];
s->mv[dir2][i+2][1] = s->mv[dir2][i][1] = s->current_picture.motion_val[dir2][s->block_index[i]][1] = s->current_picture.motion_val[dir2][s->block_index[i+2]][1];
}
} else {
v->blk_mv_type[s->block_index[0]] = 1;
v->blk_mv_type[s->block_index[1]] = 1;
v->blk_mv_type[s->block_index[2]] = 1;
v->blk_mv_type[s->block_index[3]] = 1;
ff_vc1_pred_mv_intfr(v, 0, 0, 0, 2, v->range_x, v->range_y, 0, !dir);
for (i = 0; i < 2; i++) {
s->mv[!dir][i+2][0] = s->mv[!dir][i][0] = s->current_picture.motion_val[!dir][s->block_index[i+2]][0] = s->current_picture.motion_val[!dir][s->block_index[i]][0];
s->mv[!dir][i+2][1] = s->mv[!dir][i][1] = s->current_picture.motion_val[!dir][s->block_index[i+2]][1] = s->current_picture.motion_val[!dir][s->block_index[i]][1];
}
}
}
}
ff_vc1_mc_1mv(v, dir);
if (direct || bmvtype == BMV_TYPE_INTERPOLATED) {
ff_vc1_interp_mc(v);
}
}
}
if (s->mb_x == s->mb_width - 1)
memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
v->cbp[s->mb_x] = block_cbp;
v->ttblk[s->mb_x] = block_tt;
return 0;
}
/** Decode blocks of I-frame
*/
static void vc1_decode_i_blocks(VC1Context *v)
{
int k, j;
MpegEncContext *s = &v->s;
int cbp, val;
uint8_t *coded_val;
int mb_pos;
/* select codingmode used for VLC tables selection */
switch (v->y_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch (v->c_ac_table_index) {
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
/* Set DC scale - y and c use the same */
s->y_dc_scale = s->y_dc_scale_table[v->pq];
s->c_dc_scale = s->c_dc_scale_table[v->pq];
//do frame decode
s->mb_x = s->mb_y = 0;
s->mb_intra = 1;
s->first_slice_line = 1;
for (s->mb_y = 0; s->mb_y < s->end_mb_y; s->mb_y++) {
s->mb_x = 0;
init_block_index(v);
for (; s->mb_x < v->end_mb_x; s->mb_x++) {
uint8_t *dst[6];
ff_update_block_index(s);
dst[0] = s->dest[0];
dst[1] = dst[0] + 8;
dst[2] = s->dest[0] + s->linesize * 8;
dst[3] = dst[2] + 8;
dst[4] = s->dest[1];
dst[5] = s->dest[2];
s->bdsp.clear_blocks(s->block[0]);
mb_pos = s->mb_x + s->mb_y * s->mb_width;
s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
s->current_picture.qscale_table[mb_pos] = v->pq;
s->current_picture.motion_val[1][s->block_index[0]][0] = 0;
s->current_picture.motion_val[1][s->block_index[0]][1] = 0;
// do actual MB decoding and displaying
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
v->s.ac_pred = get_bits1(&v->s.gb);
for (k = 0; k < 6; k++) {
val = ((cbp >> (5 - k)) & 1);
if (k < 4) {
int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
val = val ^ pred;
*coded_val = val;
}
cbp |= val << (5 - k);
vc1_decode_i_block(v, s->block[k], k, val, (k < 4) ? v->codingset : v->codingset2);
if (k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(s->block[k]);
if (v->pq >= 9 && v->overlap) {
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[k][j] <<= 1;
s->idsp.put_signed_pixels_clamped(s->block[k], dst[k],
k & 4 ? s->uvlinesize
: s->linesize);
} else {
if (v->rangeredfrm)
for (j = 0; j < 64; j++)
s->block[k][j] = (s->block[k][j] - 64) << 1;
s->idsp.put_pixels_clamped(s->block[k], dst[k],
k & 4 ? s->uvlinesize
: s->linesize);
}
}
if (v->pq >= 9 && v->overlap) {
if (s->mb_x) {
v->vc1dsp.vc1_h_overlap(s->dest[0], s->linesize);
v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
v->vc1dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);
v->vc1dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);
}
}
v->vc1dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);
v->vc1dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
if (!s->first_slice_line) {
v->vc1dsp.vc1_v_overlap(s->dest[0], s->linesize);
v->vc1dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);
if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
v->vc1dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);
v->vc1dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);
}
}
v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);
v->vc1dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);
}
if (v->s.loop_filter)
ff_vc1_loop_filter_iblk(v, v->pq);
if (get_bits_count(&s->gb) > v->bits) {
ff_er_add_slice(&s->er, 0, 0, s->mb_x, s->mb_y, ER_MB_ERROR);
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
get_bits_count(&s->gb), v->bits);
return;
}
}
if (!v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
else if (s->mb_y)
ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
s->first_slice_line = 0;
}
if (v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
/* This is intentionally mb_height and not end_mb_y - unlike in advanced
* profile, these only differ are when decoding MSS2 rectangles. */
ff_er_add_slice(&s->er, 0, 0, s->mb_width - 1, s->mb_height - 1, ER_MB_END);
}
/** Decode blocks of I-frame for advanced profile
*/
static void vc1_decode_i_blocks_adv(VC1Context *v)
{
int k;
MpegEncContext *s = &v->s;
int cbp, val;
uint8_t *coded_val;
int mb_pos;
int mquant = v->pq;
int mqdiff;
GetBitContext *gb = &s->gb;
/* select codingmode used for VLC tables selection */
switch (v->y_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch (v->c_ac_table_index) {
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
// do frame decode
s->mb_x = s->mb_y = 0;
s->mb_intra = 1;
s->first_slice_line = 1;
s->mb_y = s->start_mb_y;
if (s->start_mb_y) {
s->mb_x = 0;
init_block_index(v);
memset(&s->coded_block[s->block_index[0] - s->b8_stride], 0,
(1 + s->b8_stride) * sizeof(*s->coded_block));
}
for (; s->mb_y < s->end_mb_y; s->mb_y++) {
s->mb_x = 0;
init_block_index(v);
for (;s->mb_x < s->mb_width; s->mb_x++) {
int16_t (*block)[64] = v->block[v->cur_blk_idx];
ff_update_block_index(s);
s->bdsp.clear_blocks(block[0]);
mb_pos = s->mb_x + s->mb_y * s->mb_stride;
s->current_picture.mb_type[mb_pos + v->mb_off] = MB_TYPE_INTRA;
s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][0] = 0;
s->current_picture.motion_val[1][s->block_index[0] + v->blocks_off][1] = 0;
// do actual MB decoding and displaying
if (v->fieldtx_is_raw)
v->fieldtx_plane[mb_pos] = get_bits1(&v->s.gb);
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
if (v->acpred_is_raw)
v->s.ac_pred = get_bits1(&v->s.gb);
else
v->s.ac_pred = v->acpred_plane[mb_pos];
if (v->condover == CONDOVER_SELECT && v->overflg_is_raw)
v->over_flags_plane[mb_pos] = get_bits1(&v->s.gb);
GET_MQUANT();
s->current_picture.qscale_table[mb_pos] = mquant;
/* Set DC scale - y and c use the same */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
for (k = 0; k < 6; k++) {
val = ((cbp >> (5 - k)) & 1);
if (k < 4) {
int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
val = val ^ pred;
*coded_val = val;
}
cbp |= val << (5 - k);
v->a_avail = !s->first_slice_line || (k == 2 || k == 3);
v->c_avail = !!s->mb_x || (k == 1 || k == 3);
vc1_decode_i_block_adv(v, block[k], k, val,
(k < 4) ? v->codingset : v->codingset2, mquant);
if (k > 3 && (s->avctx->flags & AV_CODEC_FLAG_GRAY))
continue;
v->vc1dsp.vc1_inv_trans_8x8(block[k]);
}
ff_vc1_smooth_overlap_filter_iblk(v);
vc1_put_signed_blocks_clamped(v);
if (v->s.loop_filter)
ff_vc1_loop_filter_iblk_delayed(v, v->pq);
if (get_bits_count(&s->gb) > v->bits) {
// TODO: may need modification to handle slice coding
ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n",
get_bits_count(&s->gb), v->bits);
return;
}
}
if (!v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
else if (s->mb_y)
ff_mpeg_draw_horiz_band(s, (s->mb_y-1) * 16, 16);
s->first_slice_line = 0;
}
/* raw bottom MB row */
s->mb_x = 0;
init_block_index(v);
for (;s->mb_x < s->mb_width; s->mb_x++) {
ff_update_block_index(s);
vc1_put_signed_blocks_clamped(v);
if (v->s.loop_filter)
ff_vc1_loop_filter_iblk_delayed(v, v->pq);
}
if (v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, (s->end_mb_y-1)*16, 16);
ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
(s->end_mb_y << v->field_mode) - 1, ER_MB_END);
}
static void vc1_decode_p_blocks(VC1Context *v)
{
MpegEncContext *s = &v->s;
int apply_loop_filter;
/* select codingmode used for VLC tables selection */
switch (v->c_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch (v->c_ac_table_index) {
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
apply_loop_filter = s->loop_filter && !(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY) &&
v->fcm == PROGRESSIVE;
s->first_slice_line = 1;
memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);
for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
s->mb_x = 0;
init_block_index(v);
for (; s->mb_x < s->mb_width; s->mb_x++) {
ff_update_block_index(s);
if (v->fcm == ILACE_FIELD)
vc1_decode_p_mb_intfi(v);
else if (v->fcm == ILACE_FRAME)
vc1_decode_p_mb_intfr(v);
else vc1_decode_p_mb(v);
if (s->mb_y != s->start_mb_y && apply_loop_filter)
ff_vc1_apply_p_loop_filter(v);
if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
// TODO: may need modification to handle slice coding
ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
return;
}
}
memmove(v->cbp_base, v->cbp, sizeof(v->cbp_base[0]) * s->mb_stride);
memmove(v->ttblk_base, v->ttblk, sizeof(v->ttblk_base[0]) * s->mb_stride);
memmove(v->is_intra_base, v->is_intra, sizeof(v->is_intra_base[0]) * s->mb_stride);
memmove(v->luma_mv_base, v->luma_mv, sizeof(v->luma_mv_base[0]) * s->mb_stride);
if (s->mb_y != s->start_mb_y) ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
s->first_slice_line = 0;
}
if (apply_loop_filter) {
s->mb_x = 0;
init_block_index(v);
for (; s->mb_x < s->mb_width; s->mb_x++) {
ff_update_block_index(s);
ff_vc1_apply_p_loop_filter(v);
}
}
if (s->end_mb_y >= s->start_mb_y)
ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
(s->end_mb_y << v->field_mode) - 1, ER_MB_END);
}
static void vc1_decode_b_blocks(VC1Context *v)
{
MpegEncContext *s = &v->s;
/* select codingmode used for VLC tables selection */
switch (v->c_ac_table_index) {
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch (v->c_ac_table_index) {
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
s->first_slice_line = 1;
for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
s->mb_x = 0;
init_block_index(v);
for (; s->mb_x < s->mb_width; s->mb_x++) {
ff_update_block_index(s);
if (v->fcm == ILACE_FIELD)
vc1_decode_b_mb_intfi(v);
else if (v->fcm == ILACE_FRAME)
vc1_decode_b_mb_intfr(v);
else
vc1_decode_b_mb(v);
if (get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
// TODO: may need modification to handle slice coding
ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_x, s->mb_y, ER_MB_ERROR);
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n",
get_bits_count(&s->gb), v->bits, s->mb_x, s->mb_y);
return;
}
if (v->s.loop_filter)
ff_vc1_loop_filter_iblk(v, v->pq);
}
if (!v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
else if (s->mb_y)
ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 16, 16);
s->first_slice_line = 0;
}
if (v->s.loop_filter)
ff_mpeg_draw_horiz_band(s, (s->end_mb_y - 1) * 16, 16);
ff_er_add_slice(&s->er, 0, s->start_mb_y << v->field_mode, s->mb_width - 1,
(s->end_mb_y << v->field_mode) - 1, ER_MB_END);
}
static void vc1_decode_skip_blocks(VC1Context *v)
{
MpegEncContext *s = &v->s;
if (!v->s.last_picture.f->data[0])
return;
ff_er_add_slice(&s->er, 0, s->start_mb_y, s->mb_width - 1, s->end_mb_y - 1, ER_MB_END);
s->first_slice_line = 1;
for (s->mb_y = s->start_mb_y; s->mb_y < s->end_mb_y; s->mb_y++) {
s->mb_x = 0;
init_block_index(v);
ff_update_block_index(s);
memcpy(s->dest[0], s->last_picture.f->data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);
memcpy(s->dest[1], s->last_picture.f->data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
memcpy(s->dest[2], s->last_picture.f->data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);
ff_mpeg_draw_horiz_band(s, s->mb_y * 16, 16);
s->first_slice_line = 0;
}
s->pict_type = AV_PICTURE_TYPE_P;
}
void ff_vc1_decode_blocks(VC1Context *v)
{
v->s.esc3_level_length = 0;
if (v->x8_type) {
ff_intrax8_decode_picture(&v->x8, 2*v->pq + v->halfpq, v->pq * !v->pquantizer);
ff_er_add_slice(&v->s.er, 0, 0,
(v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,
ER_MB_END);
} else {
v->cur_blk_idx = 0;
v->left_blk_idx = -1;
v->topleft_blk_idx = 1;
v->top_blk_idx = 2;
switch (v->s.pict_type) {
case AV_PICTURE_TYPE_I:
if (v->profile == PROFILE_ADVANCED)
vc1_decode_i_blocks_adv(v);
else
vc1_decode_i_blocks(v);
break;
case AV_PICTURE_TYPE_P:
if (v->p_frame_skipped)
vc1_decode_skip_blocks(v);
else
vc1_decode_p_blocks(v);
break;
case AV_PICTURE_TYPE_B:
if (v->bi_type) {
if (v->profile == PROFILE_ADVANCED)
vc1_decode_i_blocks_adv(v);
else
vc1_decode_i_blocks(v);
} else
vc1_decode_b_blocks(v);
break;
}
}
}
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