--- /dev/null
+/*
+ * 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 FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; 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
+ * @{
+ */
+
+
+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 {
+ av_assert0(index < esc);
+ 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 = NULL;
+ 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 = NULL;
+ 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->flags & 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->flags & 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->flags & 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->flags & 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; /* Lossy 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->flags & 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->flags & 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 = 0;
+ int block_cbp = 0, pat, block_tt = 0;
+ int idx_mbmode = 0;
+
+ mquant = v->pq; /* Lossy 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->flags & 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->flags & 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->flags & 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->flags & 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;
+
+ mquant = v->pq; /* Lossy 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->flags & 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
+ int interpmvp = 0;
+ 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 (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;
+ if (!s->next_picture_ptr->field_picture) {
+ av_log(s->avctx, AV_LOG_ERROR, "Mixed field/frame direct mode not supported\n");
+ return;
+ }
+ }
+ 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->flags & 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) {
+ if (s->next_picture_ptr->field_picture)
+ av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
+ 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->flags & 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->flags & 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->flags & 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->flags & 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->flags & 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->flags & 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);
+ } 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;
+ }
+ }
+}
repositories / deb_ffmpeg.git / blobdiff