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/*
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 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
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 * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>
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 *
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 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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/**
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 * @file cavs.c
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 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
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 * @author Stefan Gehrer <stefan.gehrer@gmx.de>
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 */
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#include "avcodec.h"
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#include "bitstream.h"
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#include "golomb.h"
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#include "mpegvideo.h"
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#include "cavsdata.h"
31

    
32
typedef struct {
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    MpegEncContext s;
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    Picture picture; ///< currently decoded frame
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    Picture DPB[2];  ///< reference frames
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    int dist[2];     ///< temporal distances from current frame to ref frames
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    int profile, level;
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    int aspect_ratio;
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    int mb_width, mb_height;
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    int pic_type;
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    int progressive;
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    int pic_structure;
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    int skip_mode_flag; ///< select between skip_count or one skip_flag per MB
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    int loop_filter_disable;
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    int alpha_offset, beta_offset;
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    int ref_flag;
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    int mbx, mby;      ///< macroblock coordinates
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    int flags;         ///< availability flags of neighbouring macroblocks
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    int stc;           ///< last start code
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    uint8_t *cy, *cu, *cv; ///< current MB sample pointers
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    int left_qp;
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    uint8_t *top_qp;
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    /** mv motion vector cache
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       0:    D3  B2  B3  C2
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       4:    A1  X0  X1   -
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       8:    A3  X2  X3   -
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       X are the vectors in the current macroblock (5,6,9,10)
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       A is the macroblock to the left (4,8)
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       B is the macroblock to the top (1,2)
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       C is the macroblock to the top-right (3)
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       D is the macroblock to the top-left (0)
64

65
       the same is repeated for backward motion vectors */
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    vector_t mv[2*4*3];
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    vector_t *top_mv[2];
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    vector_t *col_mv;
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    /** luma pred mode cache
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       0:    --  B2  B3
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       3:    A1  X0  X1
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       6:    A3  X2  X3   */
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    int pred_mode_Y[3*3];
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    int *top_pred_Y;
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    int l_stride, c_stride;
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    int luma_scan[4];
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    int qp;
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    int qp_fixed;
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    int cbp;
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    /** intra prediction is done with un-deblocked samples
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     they are saved here before deblocking the MB  */
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    uint8_t *top_border_y, *top_border_u, *top_border_v;
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    uint8_t left_border_y[16], left_border_u[10], left_border_v[10];
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    uint8_t topleft_border_y, topleft_border_u, topleft_border_v;
87

    
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    void (*intra_pred_l[8])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
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    void (*intra_pred_c[7])(uint8_t *d,uint8_t *top,uint8_t *left,int stride);
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    uint8_t *col_type_base;
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    uint8_t *col_type;
92

    
93
    /* scaling factors for MV prediction */
94
    int sym_factor;    ///< for scaling in symmetrical B block
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    int direct_den[2]; ///< for scaling in direct B block
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    int scale_den[2];  ///< for scaling neighbouring MVs
97

    
98
    int got_keyframe;
99
} AVSContext;
100

    
101
/*****************************************************************************
102
 *
103
 * in-loop deblocking filter
104
 *
105
 ****************************************************************************/
106

    
107
static inline int get_bs_p(vector_t *mvP, vector_t *mvQ) {
108
    if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
109
        return 2;
110
    if(mvP->ref != mvQ->ref)
111
        return 1;
112
    if( (abs(mvP->x - mvQ->x) >= 4) ||  (abs(mvP->y - mvQ->y) >= 4) )
113
        return 1;
114
    return 0;
115
}
116

    
117
static inline int get_bs_b(vector_t *mvP, vector_t *mvQ) {
118
    if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA)) {
119
        return 2;
120
    } else {
121
        vector_t *mvPbw = mvP + MV_BWD_OFFS;
122
        vector_t *mvQbw = mvQ + MV_BWD_OFFS;
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        if( (abs(  mvP->x -   mvQ->x) >= 4) ||
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            (abs(  mvP->y -   mvQ->y) >= 4) ||
125
            (abs(mvPbw->x - mvQbw->x) >= 4) ||
126
            (abs(mvPbw->y - mvQbw->y) >= 4) )
127
            return 1;
128
    }
129
    return 0;
130
}
131

    
132
#define SET_PARAMS                                            \
133
    alpha = alpha_tab[clip(qp_avg + h->alpha_offset,0,63)];   \
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    beta  =  beta_tab[clip(qp_avg + h->beta_offset, 0,63)];   \
135
    tc    =    tc_tab[clip(qp_avg + h->alpha_offset,0,63)];
136

    
137
/**
138
 * in-loop deblocking filter for a single macroblock
139
 *
140
 * boundary strength (bs) mapping:
141
 *
142
 * --4---5--
143
 * 0   2   |
144
 * | 6 | 7 |
145
 * 1   3   |
146
 * ---------
147
 *
148
 */
149
static void filter_mb(AVSContext *h, enum mb_t mb_type) {
150
    DECLARE_ALIGNED_8(uint8_t, bs[8]);
151
    int qp_avg, alpha, beta, tc;
152
    int i;
153

    
154
    /* save un-deblocked lines */
155
    h->topleft_border_y = h->top_border_y[h->mbx*16+15];
156
    h->topleft_border_u = h->top_border_u[h->mbx*10+8];
157
    h->topleft_border_v = h->top_border_v[h->mbx*10+8];
158
    memcpy(&h->top_border_y[h->mbx*16], h->cy + 15* h->l_stride,16);
159
    memcpy(&h->top_border_u[h->mbx*10+1], h->cu +  7* h->c_stride,8);
160
    memcpy(&h->top_border_v[h->mbx*10+1], h->cv +  7* h->c_stride,8);
161
    for(i=0;i<8;i++) {
162
        h->left_border_y[i*2+0] = *(h->cy + 15 + (i*2+0)*h->l_stride);
163
        h->left_border_y[i*2+1] = *(h->cy + 15 + (i*2+1)*h->l_stride);
164
        h->left_border_u[i+1] = *(h->cu + 7 + i*h->c_stride);
165
        h->left_border_v[i+1] = *(h->cv + 7 + i*h->c_stride);
166
    }
167
    if(!h->loop_filter_disable) {
168
        /* clear bs */
169
        *((uint64_t *)bs) = 0;
170
        /* determine bs */
171
        switch(mb_type) {
172
        case I_8X8:
173
            *((uint64_t *)bs) = 0x0202020202020202ULL;
174
            break;
175
        case P_8X8:
176
        case P_8X16:
177
            bs[2] = get_bs_p(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1]);
178
            bs[3] = get_bs_p(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3]);
179
        case P_16X8:
180
            bs[6] = get_bs_p(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2]);
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            bs[7] = get_bs_p(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3]);
182
        case P_16X16:
183
        case P_SKIP:
184
            bs[0] = get_bs_p(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0]);
185
            bs[1] = get_bs_p(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2]);
186
            bs[4] = get_bs_p(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0]);
187
            bs[5] = get_bs_p(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1]);
188
            break;
189
        case B_SKIP:
190
        case B_DIRECT:
191
        case B_8X8:
192
            bs[2] = get_bs_b(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1]);
193
            bs[3] = get_bs_b(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3]);
194
            bs[6] = get_bs_b(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2]);
195
            bs[7] = get_bs_b(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3]);
196
        case B_FWD_16X16:
197
        case B_BWD_16X16:
198
        case B_SYM_16X16:
199
            bs[0] = get_bs_b(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0]);
200
            bs[1] = get_bs_b(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2]);
201
            bs[4] = get_bs_b(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0]);
202
            bs[5] = get_bs_b(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1]);
203
            break;
204
        default:
205
            if(mb_type & 1) { //16X8
206
                bs[6] = bs[7] = get_bs_b(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2]);
207
            } else {          //8X16
208
                bs[2] = bs[3] = get_bs_b(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1]);
209
            }
210
            bs[0] = get_bs_b(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0]);
211
            bs[1] = get_bs_b(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2]);
212
            bs[4] = get_bs_b(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0]);
213
            bs[5] = get_bs_b(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1]);
214
        }
215
        if( *((uint64_t *)bs) ) {
216
            if(h->flags & A_AVAIL) {
217
                qp_avg = (h->qp + h->left_qp + 1) >> 1;
218
                SET_PARAMS;
219
                h->s.dsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]);
220
                h->s.dsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
221
                h->s.dsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
222
            }
223
            qp_avg = h->qp;
224
            SET_PARAMS;
225
            h->s.dsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]);
226
            h->s.dsp.cavs_filter_lh(h->cy + 8*h->l_stride,h->l_stride,alpha,beta,tc,
227
                           bs[6],bs[7]);
228

    
229
            if(h->flags & B_AVAIL) {
230
                qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
231
                SET_PARAMS;
232
                h->s.dsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]);
233
                h->s.dsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
234
                h->s.dsp.cavs_filter_ch(h->cv,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
235
            }
236
        }
237
    }
238
    h->left_qp = h->qp;
239
    h->top_qp[h->mbx] = h->qp;
240
}
241

    
242
#undef SET_PARAMS
243

    
244
/*****************************************************************************
245
 *
246
 * spatial intra prediction
247
 *
248
 ****************************************************************************/
249

    
250
static inline void load_intra_pred_luma(AVSContext *h, uint8_t *top,
251
                                        uint8_t *left, int block) {
252
    int i;
253

    
254
    switch(block) {
255
    case 0:
256
        memcpy(&left[1],h->left_border_y,16);
257
        left[0] = left[1];
258
        left[17] = left[16];
259
        memcpy(&top[1],&h->top_border_y[h->mbx*16],16);
260
        top[17] = top[16];
261
        top[0] = top[1];
262
        if((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
263
            left[0] = top[0] = h->topleft_border_y;
264
        break;
265
    case 1:
266
        for(i=0;i<8;i++)
267
            left[i+1] = *(h->cy + 7 + i*h->l_stride);
268
        memset(&left[9],left[8],9);
269
        left[0] = left[1];
270
        memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8);
271
        if(h->flags & C_AVAIL)
272
            memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8);
273
        else
274
            memset(&top[9],top[8],9);
275
        top[17] = top[16];
276
        top[0] = top[1];
277
        if(h->flags & B_AVAIL)
278
            left[0] = top[0] = h->top_border_y[h->mbx*16+7];
279
        break;
280
    case 2:
281
        memcpy(&left[1],&h->left_border_y[8],8);
282
        memset(&left[9],left[8],9);
283
        memcpy(&top[1],h->cy + 7*h->l_stride,16);
284
        top[17] = top[16];
285
        left[0] = h->left_border_y[7];
286
        top[0] = top[1];
287
        if(h->flags & A_AVAIL)
288
            top[0] = left[0];
289
        break;
290
    case 3:
291
        for(i=0;i<9;i++)
292
            left[i] = *(h->cy + 7 + (i+7)*h->l_stride);
293
        memset(&left[9],left[8],9);
294
        memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9);
295
        memset(&top[9],top[8],9);
296
        break;
297
    }
298
}
299

    
300
static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
301
    int y;
302
    uint64_t a = *((uint64_t *)(&top[1]));
303
    for(y=0;y<8;y++) {
304
        *((uint64_t *)(d+y*stride)) = a;
305
    }
306
}
307

    
308
static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
309
    int y;
310
    uint64_t a;
311
    for(y=0;y<8;y++) {
312
        a = left[y+1] * 0x0101010101010101ULL;
313
        *((uint64_t *)(d+y*stride)) = a;
314
    }
315
}
316

    
317
static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
318
    int y;
319
    uint64_t a = 0x8080808080808080ULL;
320
    for(y=0;y<8;y++)
321
        *((uint64_t *)(d+y*stride)) = a;
322
}
323

    
324
static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
325
    int x,y,ia;
326
    int ih = 0;
327
    int iv = 0;
328
    uint8_t *cm = cropTbl + MAX_NEG_CROP;
329

    
330
    for(x=0; x<4; x++) {
331
        ih += (x+1)*(top[5+x]-top[3-x]);
332
        iv += (x+1)*(left[5+x]-left[3-x]);
333
    }
334
    ia = (top[8]+left[8])<<4;
335
    ih = (17*ih+16)>>5;
336
    iv = (17*iv+16)>>5;
337
    for(y=0; y<8; y++)
338
        for(x=0; x<8; x++)
339
            d[y*stride+x] = cm[(ia+(x-3)*ih+(y-3)*iv+16)>>5];
340
}
341

    
342
#define LOWPASS(ARRAY,INDEX)                                            \
343
    (( ARRAY[(INDEX)-1] + 2*ARRAY[(INDEX)] + ARRAY[(INDEX)+1] + 2) >> 2)
344

    
345
static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
346
    int x,y;
347
    for(y=0; y<8; y++)
348
        for(x=0; x<8; x++)
349
            d[y*stride+x] = (LOWPASS(top,x+1) + LOWPASS(left,y+1)) >> 1;
350
}
351

    
352
static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
353
    int x,y;
354
    for(y=0; y<8; y++)
355
        for(x=0; x<8; x++)
356
            d[y*stride+x] = (LOWPASS(top,x+y+2) + LOWPASS(left,x+y+2)) >> 1;
357
}
358

    
359
static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
360
    int x,y;
361
    for(y=0; y<8; y++)
362
        for(x=0; x<8; x++)
363
            if(x==y)
364
                d[y*stride+x] = (left[1]+2*top[0]+top[1]+2)>>2;
365
            else if(x>y)
366
                d[y*stride+x] = LOWPASS(top,x-y);
367
            else
368
                d[y*stride+x] = LOWPASS(left,y-x);
369
}
370

    
371
static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
372
    int x,y;
373
    for(y=0; y<8; y++)
374
        for(x=0; x<8; x++)
375
            d[y*stride+x] = LOWPASS(left,y+1);
376
}
377

    
378
static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
379
    int x,y;
380
    for(y=0; y<8; y++)
381
        for(x=0; x<8; x++)
382
            d[y*stride+x] = LOWPASS(top,x+1);
383
}
384

    
385
#undef LOWPASS
386

    
387
static inline void modify_pred(const int_fast8_t *mod_table, int *mode) {
388
    *mode = mod_table[*mode];
389
    if(*mode < 0) {
390
        av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
391
        *mode = 0;
392
    }
393
}
394

    
395
/*****************************************************************************
396
 *
397
 * motion compensation
398
 *
399
 ****************************************************************************/
400

    
401
static inline void mc_dir_part(AVSContext *h,Picture *pic,int square,
402
                        int chroma_height,int delta,int list,uint8_t *dest_y,
403
                        uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset,
404
                        int src_y_offset,qpel_mc_func *qpix_op,
405
                        h264_chroma_mc_func chroma_op,vector_t *mv){
406
    MpegEncContext * const s = &h->s;
407
    const int mx= mv->x + src_x_offset*8;
408
    const int my= mv->y + src_y_offset*8;
409
    const int luma_xy= (mx&3) + ((my&3)<<2);
410
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->l_stride;
411
    uint8_t * src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->c_stride;
412
    uint8_t * src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->c_stride;
413
    int extra_width= 0; //(s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
414
    int extra_height= extra_width;
415
    int emu=0;
416
    const int full_mx= mx>>2;
417
    const int full_my= my>>2;
418
    const int pic_width  = 16*h->mb_width;
419
    const int pic_height = 16*h->mb_height;
420

    
421
    if(!pic->data[0])
422
        return;
423
    if(mx&7) extra_width -= 3;
424
    if(my&7) extra_height -= 3;
425

    
426
    if(   full_mx < 0-extra_width
427
          || full_my < 0-extra_height
428
          || full_mx + 16/*FIXME*/ > pic_width + extra_width
429
          || full_my + 16/*FIXME*/ > pic_height + extra_height){
430
        ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->l_stride, h->l_stride,
431
                            16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
432
        src_y= s->edge_emu_buffer + 2 + 2*h->l_stride;
433
        emu=1;
434
    }
435

    
436
    qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps?
437
    if(!square){
438
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->l_stride);
439
    }
440

    
441
    if(emu){
442
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->c_stride,
443
                            9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
444
        src_cb= s->edge_emu_buffer;
445
    }
446
    chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7);
447

    
448
    if(emu){
449
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->c_stride,
450
                            9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
451
        src_cr= s->edge_emu_buffer;
452
    }
453
    chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7);
454
}
455

    
456
static inline void mc_part_std(AVSContext *h,int square,int chroma_height,int delta,
457
                        uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr,
458
                        int x_offset, int y_offset,qpel_mc_func *qpix_put,
459
                        h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg,
460
                        h264_chroma_mc_func chroma_avg, vector_t *mv){
461
    qpel_mc_func *qpix_op=  qpix_put;
462
    h264_chroma_mc_func chroma_op= chroma_put;
463

    
464
    dest_y  += 2*x_offset + 2*y_offset*h->l_stride;
465
    dest_cb +=   x_offset +   y_offset*h->c_stride;
466
    dest_cr +=   x_offset +   y_offset*h->c_stride;
467
    x_offset += 8*h->mbx;
468
    y_offset += 8*h->mby;
469

    
470
    if(mv->ref >= 0){
471
        Picture *ref= &h->DPB[mv->ref];
472
        mc_dir_part(h, ref, square, chroma_height, delta, 0,
473
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
474
                    qpix_op, chroma_op, mv);
475

    
476
        qpix_op=  qpix_avg;
477
        chroma_op= chroma_avg;
478
    }
479

    
480
    if((mv+MV_BWD_OFFS)->ref >= 0){
481
        Picture *ref= &h->DPB[0];
482
        mc_dir_part(h, ref, square, chroma_height, delta, 1,
483
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
484
                    qpix_op, chroma_op, mv+MV_BWD_OFFS);
485
    }
486
}
487

    
488
static void inter_pred(AVSContext *h) {
489
    /* always do 8x8 blocks TODO: are larger blocks worth it? */
490
    mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 0,
491
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
492
                h->s.dsp.put_h264_chroma_pixels_tab[1],
493
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
494
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]);
495
    mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 0,
496
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
497
                h->s.dsp.put_h264_chroma_pixels_tab[1],
498
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
499
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]);
500
    mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 4,
501
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
502
                h->s.dsp.put_h264_chroma_pixels_tab[1],
503
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
504
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]);
505
    mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 4,
506
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
507
                h->s.dsp.put_h264_chroma_pixels_tab[1],
508
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
509
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X3]);
510
    /* set intra prediction modes to default values */
511
    h->pred_mode_Y[3] =  h->pred_mode_Y[6] = INTRA_L_LP;
512
    h->top_pred_Y[h->mbx*2+0] = h->top_pred_Y[h->mbx*2+1] = INTRA_L_LP;
513
}
514

    
515
/*****************************************************************************
516
 *
517
 * motion vector prediction
518
 *
519
 ****************************************************************************/
520

    
521
static inline void set_mvs(vector_t *mv, enum block_t size) {
522
    switch(size) {
523
    case BLK_16X16:
524
        mv[MV_STRIDE  ] = mv[0];
525
        mv[MV_STRIDE+1] = mv[0];
526
    case BLK_16X8:
527
        mv[1] = mv[0];
528
        break;
529
    case BLK_8X16:
530
        mv[MV_STRIDE] = mv[0];
531
        break;
532
    }
533
}
534

    
535
static inline void store_mvs(AVSContext *h) {
536
    h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 0] = h->mv[MV_FWD_X0];
537
    h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 1] = h->mv[MV_FWD_X1];
538
    h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 2] = h->mv[MV_FWD_X2];
539
    h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 3] = h->mv[MV_FWD_X3];
540
}
541

    
542
static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, vector_t *src, int distp) {
543
    int den = h->scale_den[src->ref];
544

    
545
    *d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9;
546
    *d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9;
547
}
548

    
549
static inline void mv_pred_median(AVSContext *h, vector_t *mvP, vector_t *mvA, vector_t *mvB, vector_t *mvC) {
550
    int ax, ay, bx, by, cx, cy;
551
    int len_ab, len_bc, len_ca, len_mid;
552

    
553
    /* scale candidates according to their temporal span */
554
    scale_mv(h, &ax, &ay, mvA, mvP->dist);
555
    scale_mv(h, &bx, &by, mvB, mvP->dist);
556
    scale_mv(h, &cx, &cy, mvC, mvP->dist);
557
    /* find the geometrical median of the three candidates */
558
    len_ab = abs(ax - bx) + abs(ay - by);
559
    len_bc = abs(bx - cx) + abs(by - cy);
560
    len_ca = abs(cx - ax) + abs(cy - ay);
561
    len_mid = mid_pred(len_ab, len_bc, len_ca);
562
    if(len_mid == len_ab) {
563
        mvP->x = cx;
564
        mvP->y = cy;
565
    } else if(len_mid == len_bc) {
566
        mvP->x = ax;
567
        mvP->y = ay;
568
    } else {
569
        mvP->x = bx;
570
        mvP->y = by;
571
    }
572
}
573

    
574
static inline void mv_pred_direct(AVSContext *h, vector_t *pmv_fw,
575
                                  vector_t *col_mv) {
576
    vector_t *pmv_bw = pmv_fw + MV_BWD_OFFS;
577
    int den = h->direct_den[col_mv->ref];
578
    int m = col_mv->x >> 31;
579

    
580
    pmv_fw->dist = h->dist[1];
581
    pmv_bw->dist = h->dist[0];
582
    pmv_fw->ref = 1;
583
    pmv_bw->ref = 0;
584
    /* scale the co-located motion vector according to its temporal span */
585
    pmv_fw->x = (((den+(den*col_mv->x*pmv_fw->dist^m)-m-1)>>14)^m)-m;
586
    pmv_bw->x = m-(((den+(den*col_mv->x*pmv_bw->dist^m)-m-1)>>14)^m);
587
    m = col_mv->y >> 31;
588
    pmv_fw->y = (((den+(den*col_mv->y*pmv_fw->dist^m)-m-1)>>14)^m)-m;
589
    pmv_bw->y = m-(((den+(den*col_mv->y*pmv_bw->dist^m)-m-1)>>14)^m);
590
}
591

    
592
static inline void mv_pred_sym(AVSContext *h, vector_t *src, enum block_t size) {
593
    vector_t *dst = src + MV_BWD_OFFS;
594

    
595
    /* backward mv is the scaled and negated forward mv */
596
    dst->x = -((src->x * h->sym_factor + 256) >> 9);
597
    dst->y = -((src->y * h->sym_factor + 256) >> 9);
598
    dst->ref = 0;
599
    dst->dist = h->dist[0];
600
    set_mvs(dst, size);
601
}
602

    
603
static void mv_pred(AVSContext *h, enum mv_loc_t nP, enum mv_loc_t nC,
604
                    enum mv_pred_t mode, enum block_t size, int ref) {
605
    vector_t *mvP = &h->mv[nP];
606
    vector_t *mvA = &h->mv[nP-1];
607
    vector_t *mvB = &h->mv[nP-4];
608
    vector_t *mvC = &h->mv[nC];
609
    int mvAref = mvA->ref;
610
    int mvBref = mvB->ref;
611
    int mvCref;
612

    
613
    mvP->ref = ref;
614
    mvP->dist = h->dist[mvP->ref];
615
    if(mvC->ref == NOT_AVAIL)
616
        mvC = &h->mv[nP-5]; // set to top-left (mvD)
617
    mvCref = mvC->ref;
618
    if(mode == MV_PRED_PSKIP) {
619
        if((mvAref == NOT_AVAIL) || (mvBref == NOT_AVAIL) ||
620
           ((mvA->x | mvA->y | mvA->ref) == 0)  ||
621
           ((mvB->x | mvB->y | mvB->ref) == 0) ) {
622
            mvP->x = mvP->y = 0;
623
            set_mvs(mvP,size);
624
            return;
625
        }
626
    }
627
    /* if there is only one suitable candidate, take it */
628
    if((mvAref >= 0) && (mvBref < 0) && (mvCref < 0)) {
629
        mvP->x = mvA->x;
630
        mvP->y = mvA->y;
631
    } else if((mvAref < 0) && (mvBref >= 0) && (mvCref < 0)) {
632
        mvP->x = mvB->x;
633
        mvP->y = mvB->y;
634
    } else if((mvAref < 0) && (mvBref < 0) && (mvCref >= 0)) {
635
        mvP->x = mvC->x;
636
        mvP->y = mvC->y;
637
    } else {
638
        switch(mode) {
639
        case MV_PRED_LEFT:
640
            if(mvAref == mvP->ref) {
641
                mvP->x = mvA->x;
642
                mvP->y = mvA->y;
643
            } else
644
                mv_pred_median(h, mvP, mvA, mvB, mvC);
645
            break;
646
        case MV_PRED_TOP:
647
            if(mvBref == mvP->ref) {
648
                mvP->x = mvB->x;
649
                mvP->y = mvB->y;
650
            } else
651
                mv_pred_median(h, mvP, mvA, mvB, mvC);
652
            break;
653
        case MV_PRED_TOPRIGHT:
654
            if(mvCref == mvP->ref) {
655
                mvP->x = mvC->x;
656
                mvP->y = mvC->y;
657
            } else
658
                mv_pred_median(h, mvP, mvA, mvB, mvC);
659
            break;
660
        default:
661
            mv_pred_median(h, mvP, mvA, mvB, mvC);
662
            break;
663
        }
664
    }
665
    if(mode < MV_PRED_PSKIP) {
666
        mvP->x += get_se_golomb(&h->s.gb);
667
        mvP->y += get_se_golomb(&h->s.gb);
668
    }
669
    set_mvs(mvP,size);
670
}
671

    
672
/*****************************************************************************
673
 *
674
 * residual data decoding
675
 *
676
 ****************************************************************************/
677

    
678
/** kth-order exponential golomb code */
679
static inline int get_ue_code(GetBitContext *gb, int order) {
680
    if(order) {
681
        int ret = get_ue_golomb(gb) << order;
682
        return ret + get_bits(gb,order);
683
    }
684
    return get_ue_golomb(gb);
685
}
686

    
687
/**
688
 * decode coefficients from one 8x8 block, dequantize, inverse transform
689
 *  and add them to sample block
690
 * @param r pointer to 2D VLC table
691
 * @param esc_golomb_order escape codes are k-golomb with this order k
692
 * @param qp quantizer
693
 * @param dst location of sample block
694
 * @param stride line stride in frame buffer
695
 */
696
static int decode_residual_block(AVSContext *h, GetBitContext *gb,
697
                                 const residual_vlc_t *r, int esc_golomb_order,
698
                                 int qp, uint8_t *dst, int stride) {
699
    int i,pos = -1;
700
    int level_code, esc_code, level, run, mask;
701
    int level_buf[64];
702
    int run_buf[64];
703
    int dqm = dequant_mul[qp];
704
    int dqs = dequant_shift[qp];
705
    int dqa = 1 << (dqs - 1);
706
    const uint8_t *scantab = ff_zigzag_direct;
707
    DCTELEM block[64];
708

    
709
    memset(block,0,64*sizeof(DCTELEM));
710
    for(i=0;i<65;i++) {
711
        level_code = get_ue_code(gb,r->golomb_order);
712
        if(level_code >= ESCAPE_CODE) {
713
            run = (level_code - ESCAPE_CODE) >> 1;
714
            esc_code = get_ue_code(gb,esc_golomb_order);
715
            level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
716
            while(level > r->inc_limit)
717
                r++;
718
            mask = -(level_code & 1);
719
            level = (level^mask) - mask;
720
        } else {
721
            if(level_code < 0)
722
                return -1;
723
            level = r->rltab[level_code][0];
724
            if(!level) //end of block signal
725
                break;
726
            run   = r->rltab[level_code][1];
727
            r += r->rltab[level_code][2];
728
        }
729
        level_buf[i] = level;
730
        run_buf[i] = run;
731
    }
732
    /* inverse scan and dequantization */
733
    while(--i >= 0){
734
        pos += 1 + run_buf[i];
735
        if(pos > 63) {
736
            av_log(h->s.avctx, AV_LOG_ERROR,
737
                   "position out of block bounds at pic %d MB(%d,%d)\n",
738
                   h->picture.poc, h->mbx, h->mby);
739
            return -1;
740
        }
741
        block[scantab[pos]] = (level_buf[i]*dqm + dqa) >> dqs;
742
    }
743
    h->s.dsp.cavs_idct8_add(dst,block,stride);
744
    return 0;
745
}
746

    
747

    
748
static inline void decode_residual_chroma(AVSContext *h) {
749
    if(h->cbp & (1<<4))
750
        decode_residual_block(h,&h->s.gb,chroma_2dvlc,0, chroma_qp[h->qp],
751
                              h->cu,h->c_stride);
752
    if(h->cbp & (1<<5))
753
        decode_residual_block(h,&h->s.gb,chroma_2dvlc,0, chroma_qp[h->qp],
754
                              h->cv,h->c_stride);
755
}
756

    
757
static inline void decode_residual_inter(AVSContext *h) {
758
    int block;
759

    
760
    /* get coded block pattern */
761
    h->cbp = cbp_tab[get_ue_golomb(&h->s.gb)][1];
762
    /* get quantizer */
763
    if(h->cbp && !h->qp_fixed)
764
        h->qp += get_se_golomb(&h->s.gb);
765
    for(block=0;block<4;block++)
766
        if(h->cbp & (1<<block))
767
            decode_residual_block(h,&h->s.gb,inter_2dvlc,0,h->qp,
768
                                  h->cy + h->luma_scan[block], h->l_stride);
769
    decode_residual_chroma(h);
770
}
771

    
772
/*****************************************************************************
773
 *
774
 * macroblock level
775
 *
776
 ****************************************************************************/
777

    
778
/**
779
 * initialise predictors for motion vectors and intra prediction
780
 */
781
static inline void init_mb(AVSContext *h) {
782
    int i;
783

    
784
    /* copy predictors from top line (MB B and C) into cache */
785
    for(i=0;i<3;i++) {
786
        h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
787
        h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
788
    }
789
    h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
790
    h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
791
    /* clear top predictors if MB B is not available */
792
    if(!(h->flags & B_AVAIL)) {
793
        h->mv[MV_FWD_B2] = un_mv;
794
        h->mv[MV_FWD_B3] = un_mv;
795
        h->mv[MV_BWD_B2] = un_mv;
796
        h->mv[MV_BWD_B3] = un_mv;
797
        h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
798
        h->flags &= ~(C_AVAIL|D_AVAIL);
799
    } else if(h->mbx) {
800
        h->flags |= D_AVAIL;
801
    }
802
    if(h->mbx == h->mb_width-1) //MB C not available
803
        h->flags &= ~C_AVAIL;
804
    /* clear top-right predictors if MB C is not available */
805
    if(!(h->flags & C_AVAIL)) {
806
        h->mv[MV_FWD_C2] = un_mv;
807
        h->mv[MV_BWD_C2] = un_mv;
808
    }
809
    /* clear top-left predictors if MB D is not available */
810
    if(!(h->flags & D_AVAIL)) {
811
        h->mv[MV_FWD_D3] = un_mv;
812
        h->mv[MV_BWD_D3] = un_mv;
813
    }
814
    /* set pointer for co-located macroblock type */
815
    h->col_type = &h->col_type_base[h->mby*h->mb_width + h->mbx];
816
}
817

    
818
static inline void check_for_slice(AVSContext *h);
819

    
820
/**
821
 * save predictors for later macroblocks and increase
822
 * macroblock address
823
 * @returns 0 if end of frame is reached, 1 otherwise
824
 */
825
static inline int next_mb(AVSContext *h) {
826
    int i;
827

    
828
    h->flags |= A_AVAIL;
829
    h->cy += 16;
830
    h->cu += 8;
831
    h->cv += 8;
832
    /* copy mvs as predictors to the left */
833
    for(i=0;i<=20;i+=4)
834
        h->mv[i] = h->mv[i+2];
835
    /* copy bottom mvs from cache to top line */
836
    h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
837
    h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
838
    h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
839
    h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
840
    /* next MB address */
841
    h->mbx++;
842
    if(h->mbx == h->mb_width) { //new mb line
843
        h->flags = B_AVAIL|C_AVAIL;
844
        /* clear left pred_modes */
845
        h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
846
        /* clear left mv predictors */
847
        for(i=0;i<=20;i+=4)
848
            h->mv[i] = un_mv;
849
        h->mbx = 0;
850
        h->mby++;
851
        /* re-calculate sample pointers */
852
        h->cy = h->picture.data[0] + h->mby*16*h->l_stride;
853
        h->cu = h->picture.data[1] + h->mby*8*h->c_stride;
854
        h->cv = h->picture.data[2] + h->mby*8*h->c_stride;
855
        if(h->mby == h->mb_height) { //frame end
856
            return 0;
857
        } else {
858
            //check_for_slice(h);
859
        }
860
    }
861
    return 1;
862
}
863

    
864
static void decode_mb_i(AVSContext *h) {
865
    GetBitContext *gb = &h->s.gb;
866
    int block, pred_mode_uv;
867
    uint8_t top[18];
868
    uint8_t left[18];
869
    uint8_t *d;
870

    
871
    init_mb(h);
872

    
873
    /* get intra prediction modes from stream */
874
    for(block=0;block<4;block++) {
875
        int nA,nB,predpred;
876
        int pos = scan3x3[block];
877

    
878
        nA = h->pred_mode_Y[pos-1];
879
        nB = h->pred_mode_Y[pos-3];
880
        if((nA == NOT_AVAIL) || (nB == NOT_AVAIL))
881
            predpred = 2;
882
        else
883
            predpred = FFMIN(nA,nB);
884
        if(get_bits1(gb))
885
            h->pred_mode_Y[pos] = predpred;
886
        else {
887
            h->pred_mode_Y[pos] = get_bits(gb,2);
888
            if(h->pred_mode_Y[pos] >= predpred)
889
                h->pred_mode_Y[pos]++;
890
        }
891
    }
892
    pred_mode_uv = get_ue_golomb(gb);
893
    if(pred_mode_uv > 6) {
894
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
895
        pred_mode_uv = 0;
896
    }
897

    
898
    /* save pred modes before they get modified */
899
    h->pred_mode_Y[3] =  h->pred_mode_Y[5];
900
    h->pred_mode_Y[6] =  h->pred_mode_Y[8];
901
    h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7];
902
    h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8];
903

    
904
    /* modify pred modes according to availability of neighbour samples */
905
    if(!(h->flags & A_AVAIL)) {
906
        modify_pred(left_modifier_l, &h->pred_mode_Y[4] );
907
        modify_pred(left_modifier_l, &h->pred_mode_Y[7] );
908
        modify_pred(left_modifier_c, &pred_mode_uv );
909
    }
910
    if(!(h->flags & B_AVAIL)) {
911
        modify_pred(top_modifier_l, &h->pred_mode_Y[4] );
912
        modify_pred(top_modifier_l, &h->pred_mode_Y[5] );
913
        modify_pred(top_modifier_c, &pred_mode_uv );
914
    }
915

    
916
    /* get coded block pattern */
917
    if(h->pic_type == FF_I_TYPE)
918
        h->cbp = cbp_tab[get_ue_golomb(gb)][0];
919
    if(h->cbp && !h->qp_fixed)
920
        h->qp += get_se_golomb(gb); //qp_delta
921

    
922
    /* luma intra prediction interleaved with residual decode/transform/add */
923
    for(block=0;block<4;block++) {
924
        d = h->cy + h->luma_scan[block];
925
        load_intra_pred_luma(h, top, left, block);
926
        h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
927
            (d, top, left, h->l_stride);
928
        if(h->cbp & (1<<block))
929
            decode_residual_block(h,gb,intra_2dvlc,1,h->qp,d,h->l_stride);
930
    }
931

    
932
    /* chroma intra prediction */
933
    /* extend borders by one pixel */
934
    h->left_border_u[9] = h->left_border_u[8];
935
    h->left_border_v[9] = h->left_border_v[8];
936
    h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8];
937
    h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8];
938
    if(h->mbx && h->mby) {
939
        h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u;
940
        h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v;
941
    } else {
942
        h->left_border_u[0] = h->left_border_u[1];
943
        h->left_border_v[0] = h->left_border_v[1];
944
        h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1];
945
        h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1];
946
    }
947
    h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10],
948
                                  h->left_border_u, h->c_stride);
949
    h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10],
950
                                  h->left_border_v, h->c_stride);
951

    
952
    decode_residual_chroma(h);
953
    filter_mb(h,I_8X8);
954

    
955
    /* mark motion vectors as intra */
956
    h->mv[MV_FWD_X0] = intra_mv;
957
    set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
958
    h->mv[MV_BWD_X0] = intra_mv;
959
    set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
960
    if(h->pic_type != FF_B_TYPE)
961
        *h->col_type = I_8X8;
962
}
963

    
964
static void decode_mb_p(AVSContext *h, enum mb_t mb_type) {
965
    GetBitContext *gb = &h->s.gb;
966
    int ref[4];
967

    
968
    init_mb(h);
969
    switch(mb_type) {
970
    case P_SKIP:
971
        mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
972
        break;
973
    case P_16X16:
974
        ref[0] = h->ref_flag ? 0 : get_bits1(gb);
975
        mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN,   BLK_16X16,ref[0]);
976
        break;
977
    case P_16X8:
978
        ref[0] = h->ref_flag ? 0 : get_bits1(gb);
979
        ref[2] = h->ref_flag ? 0 : get_bits1(gb);
980
        mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,      BLK_16X8, ref[0]);
981
        mv_pred(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT,     BLK_16X8, ref[2]);
982
        break;
983
    case P_8X16:
984
        ref[0] = h->ref_flag ? 0 : get_bits1(gb);
985
        ref[1] = h->ref_flag ? 0 : get_bits1(gb);
986
        mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT,     BLK_8X16, ref[0]);
987
        mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
988
        break;
989
    case P_8X8:
990
        ref[0] = h->ref_flag ? 0 : get_bits1(gb);
991
        ref[1] = h->ref_flag ? 0 : get_bits1(gb);
992
        ref[2] = h->ref_flag ? 0 : get_bits1(gb);
993
        ref[3] = h->ref_flag ? 0 : get_bits1(gb);
994
        mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN,   BLK_8X8, ref[0]);
995
        mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN,   BLK_8X8, ref[1]);
996
        mv_pred(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN,   BLK_8X8, ref[2]);
997
        mv_pred(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN,   BLK_8X8, ref[3]);
998
    }
999
    inter_pred(h);
1000
    store_mvs(h);
1001
    if(mb_type != P_SKIP)
1002
        decode_residual_inter(h);
1003
    filter_mb(h,mb_type);
1004
    *h->col_type = mb_type;
1005
}
1006

    
1007
static void decode_mb_b(AVSContext *h, enum mb_t mb_type) {
1008
    int block;
1009
    enum sub_mb_t sub_type[4];
1010
    int flags;
1011

    
1012
    init_mb(h);
1013

    
1014
    /* reset all MVs */
1015
    h->mv[MV_FWD_X0] = dir_mv;
1016
    set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
1017
    h->mv[MV_BWD_X0] = dir_mv;
1018
    set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
1019
    switch(mb_type) {
1020
    case B_SKIP:
1021
    case B_DIRECT:
1022
        if(!(*h->col_type)) {
1023
            /* intra MB at co-location, do in-plane prediction */
1024
            mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
1025
            mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
1026
        } else
1027
            /* direct prediction from co-located P MB, block-wise */
1028
            for(block=0;block<4;block++)
1029
                mv_pred_direct(h,&h->mv[mv_scan[block]],
1030
                            &h->col_mv[(h->mby*h->mb_width+h->mbx)*4 + block]);
1031
        break;
1032
    case B_FWD_16X16:
1033
        mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
1034
        break;
1035
    case B_SYM_16X16:
1036
        mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
1037
        mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
1038
        break;
1039
    case B_BWD_16X16:
1040
        mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
1041
        break;
1042
    case B_8X8:
1043
        for(block=0;block<4;block++)
1044
            sub_type[block] = get_bits(&h->s.gb,2);
1045
        for(block=0;block<4;block++) {
1046
            switch(sub_type[block]) {
1047
            case B_SUB_DIRECT:
1048
                if(!(*h->col_type)) {
1049
                    /* intra MB at co-location, do in-plane prediction */
1050
                    mv_pred(h, mv_scan[block], mv_scan[block]-3,
1051
                            MV_PRED_BSKIP, BLK_8X8, 1);
1052
                    mv_pred(h, mv_scan[block]+MV_BWD_OFFS,
1053
                            mv_scan[block]-3+MV_BWD_OFFS,
1054
                            MV_PRED_BSKIP, BLK_8X8, 0);
1055
                } else
1056
                    mv_pred_direct(h,&h->mv[mv_scan[block]],
1057
                                   &h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + block]);
1058
                break;
1059
            case B_SUB_FWD:
1060
                mv_pred(h, mv_scan[block], mv_scan[block]-3,
1061
                        MV_PRED_MEDIAN, BLK_8X8, 1);
1062
                break;
1063
            case B_SUB_SYM:
1064
                mv_pred(h, mv_scan[block], mv_scan[block]-3,
1065
                        MV_PRED_MEDIAN, BLK_8X8, 1);
1066
                mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
1067
                break;
1068
            }
1069
        }
1070
        for(block=0;block<4;block++) {
1071
            if(sub_type[block] == B_SUB_BWD)
1072
                mv_pred(h, mv_scan[block]+MV_BWD_OFFS,
1073
                        mv_scan[block]+MV_BWD_OFFS-3,
1074
                        MV_PRED_MEDIAN, BLK_8X8, 0);
1075
        }
1076
        break;
1077
    default:
1078
        assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
1079
        flags = b_partition_flags[(mb_type-1)>>1];
1080
        if(mb_type & 1) { /* 16x8 macroblock types */
1081
            if(flags & FWD0)
1082
                mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,  BLK_16X8, 1);
1083
            if(flags & SYM0) {
1084
                mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,  BLK_16X8, 1);
1085
                mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
1086
            }
1087
            if(flags & FWD1)
1088
                mv_pred(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
1089
            if(flags & SYM1) {
1090
                mv_pred(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
1091
                mv_pred_sym(h, &h->mv[9], BLK_16X8);
1092
            }
1093
            if(flags & BWD0)
1094
                mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP,  BLK_16X8, 0);
1095
            if(flags & BWD1)
1096
                mv_pred(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
1097
        } else {          /* 8x16 macroblock types */
1098
            if(flags & FWD0)
1099
                mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
1100
            if(flags & SYM0) {
1101
                mv_pred(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
1102
                mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
1103
            }
1104
            if(flags & FWD1)
1105
                mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, 1);
1106
            if(flags & SYM1) {
1107
                mv_pred(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, 1);
1108
                mv_pred_sym(h, &h->mv[6], BLK_8X16);
1109
            }
1110
            if(flags & BWD0)
1111
                mv_pred(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
1112
            if(flags & BWD1)
1113
                mv_pred(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, 0);
1114
        }
1115
    }
1116
    inter_pred(h);
1117
    if(mb_type != B_SKIP)
1118
        decode_residual_inter(h);
1119
    filter_mb(h,mb_type);
1120
}
1121

    
1122
/*****************************************************************************
1123
 *
1124
 * slice level
1125
 *
1126
 ****************************************************************************/
1127

    
1128
static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) {
1129
    if(h->stc > 0xAF)
1130
        av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
1131
    h->mby = h->stc;
1132
    if((h->mby == 0) && (!h->qp_fixed)){
1133
        h->qp_fixed = get_bits1(gb);
1134
        h->qp = get_bits(gb,6);
1135
    }
1136
    /* inter frame or second slice can have weighting params */
1137
    if((h->pic_type != FF_I_TYPE) || (!h->pic_structure && h->mby >= h->mb_width/2))
1138
        if(get_bits1(gb)) { //slice_weighting_flag
1139
            av_log(h->s.avctx, AV_LOG_ERROR,
1140
                   "weighted prediction not yet supported\n");
1141
        }
1142
    return 0;
1143
}
1144

    
1145
static inline void check_for_slice(AVSContext *h) {
1146
    GetBitContext *gb = &h->s.gb;
1147
    int align;
1148
    align = (-get_bits_count(gb)) & 7;
1149
    if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) {
1150
        get_bits_long(gb,24+align);
1151
        h->stc = get_bits(gb,8);
1152
        decode_slice_header(h,gb);
1153
    }
1154
}
1155

    
1156
/*****************************************************************************
1157
 *
1158
 * frame level
1159
 *
1160
 ****************************************************************************/
1161

    
1162
static void init_pic(AVSContext *h) {
1163
    int i;
1164

    
1165
    /* clear some predictors */
1166
    for(i=0;i<=20;i+=4)
1167
        h->mv[i] = un_mv;
1168
    h->mv[MV_BWD_X0] = dir_mv;
1169
    set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
1170
    h->mv[MV_FWD_X0] = dir_mv;
1171
    set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
1172
    h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
1173
    h->cy = h->picture.data[0];
1174
    h->cu = h->picture.data[1];
1175
    h->cv = h->picture.data[2];
1176
    h->l_stride = h->picture.linesize[0];
1177
    h->c_stride = h->picture.linesize[1];
1178
    h->luma_scan[2] = 8*h->l_stride;
1179
    h->luma_scan[3] = 8*h->l_stride+8;
1180
    h->mbx = h->mby = 0;
1181
    h->flags = 0;
1182
}
1183

    
1184
static int decode_pic(AVSContext *h) {
1185
    MpegEncContext *s = &h->s;
1186
    int skip_count;
1187
    enum mb_t mb_type;
1188

    
1189
    if (!s->context_initialized) {
1190
        if (MPV_common_init(s) < 0)
1191
            return -1;
1192
    }
1193
    get_bits(&s->gb,16);//bbv_dwlay
1194
    if(h->stc == PIC_PB_START_CODE) {
1195
        h->pic_type = get_bits(&s->gb,2) + FF_I_TYPE;
1196
        /* make sure we have the reference frames we need */
1197
        if(!h->DPB[0].data[0] ||
1198
          (!h->DPB[1].data[0] && h->pic_type == FF_B_TYPE))
1199
            return -1;
1200
    } else {
1201
        h->pic_type = FF_I_TYPE;
1202
        if(get_bits1(&s->gb))
1203
            get_bits(&s->gb,16);//time_code
1204
    }
1205
    /* release last B frame */
1206
    if(h->picture.data[0])
1207
        s->avctx->release_buffer(s->avctx, (AVFrame *)&h->picture);
1208

    
1209
    s->avctx->get_buffer(s->avctx, (AVFrame *)&h->picture);
1210
    init_pic(h);
1211
    h->picture.poc = get_bits(&s->gb,8)*2;
1212

    
1213
    /* get temporal distances and MV scaling factors */
1214
    if(h->pic_type != FF_B_TYPE) {
1215
        h->dist[0] = (h->picture.poc - h->DPB[0].poc  + 512) % 512;
1216
    } else {
1217
        h->dist[0] = (h->DPB[0].poc  - h->picture.poc + 512) % 512;
1218
    }
1219
    h->dist[1] = (h->picture.poc - h->DPB[1].poc  + 512) % 512;
1220
    h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
1221
    h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
1222
    if(h->pic_type == FF_B_TYPE) {
1223
        h->sym_factor = h->dist[0]*h->scale_den[1];
1224
    } else {
1225
        h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0;
1226
        h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0;
1227
    }
1228

    
1229
    if(s->low_delay)
1230
        get_ue_golomb(&s->gb); //bbv_check_times
1231
    h->progressive             = get_bits1(&s->gb);
1232
    if(h->progressive)
1233
        h->pic_structure = 1;
1234
    else if(!(h->pic_structure = get_bits1(&s->gb) && (h->stc == PIC_PB_START_CODE)) )
1235
        get_bits1(&s->gb);     //advanced_pred_mode_disable
1236
    skip_bits1(&s->gb);        //top_field_first
1237
    skip_bits1(&s->gb);        //repeat_first_field
1238
    h->qp_fixed                = get_bits1(&s->gb);
1239
    h->qp                      = get_bits(&s->gb,6);
1240
    if(h->pic_type == FF_I_TYPE) {
1241
        if(!h->progressive && !h->pic_structure)
1242
            skip_bits1(&s->gb);//what is this?
1243
        skip_bits(&s->gb,4);   //reserved bits
1244
    } else {
1245
        if(!(h->pic_type == FF_B_TYPE && h->pic_structure == 1))
1246
            h->ref_flag        = get_bits1(&s->gb);
1247
        skip_bits(&s->gb,4);   //reserved bits
1248
        h->skip_mode_flag      = get_bits1(&s->gb);
1249
    }
1250
    h->loop_filter_disable     = get_bits1(&s->gb);
1251
    if(!h->loop_filter_disable && get_bits1(&s->gb)) {
1252
        h->alpha_offset        = get_se_golomb(&s->gb);
1253
        h->beta_offset         = get_se_golomb(&s->gb);
1254
    } else {
1255
        h->alpha_offset = h->beta_offset  = 0;
1256
    }
1257
    check_for_slice(h);
1258
    if(h->pic_type == FF_I_TYPE) {
1259
        do {
1260
            decode_mb_i(h);
1261
        } while(next_mb(h));
1262
    } else if(h->pic_type == FF_P_TYPE) {
1263
        do {
1264
            if(h->skip_mode_flag) {
1265
                skip_count = get_ue_golomb(&s->gb);
1266
                while(skip_count--) {
1267
                    decode_mb_p(h,P_SKIP);
1268
                    if(!next_mb(h))
1269
                        goto done;
1270
                }
1271
                mb_type = get_ue_golomb(&s->gb) + P_16X16;
1272
            } else
1273
                mb_type = get_ue_golomb(&s->gb) + P_SKIP;
1274
            if(mb_type > P_8X8) {
1275
                h->cbp = cbp_tab[mb_type - P_8X8 - 1][0];
1276
                decode_mb_i(h);
1277
            } else
1278
                decode_mb_p(h,mb_type);
1279
        } while(next_mb(h));
1280
    } else { /* FF_B_TYPE */
1281
        do {
1282
            if(h->skip_mode_flag) {
1283
                skip_count = get_ue_golomb(&s->gb);
1284
                while(skip_count--) {
1285
                    decode_mb_b(h,B_SKIP);
1286
                    if(!next_mb(h))
1287
                        goto done;
1288
                }
1289
                mb_type = get_ue_golomb(&s->gb) + B_DIRECT;
1290
            } else
1291
                mb_type = get_ue_golomb(&s->gb) + B_SKIP;
1292
            init_mb(h);
1293
            if(mb_type > B_8X8) {
1294
                h->cbp = cbp_tab[mb_type - B_8X8 - 1][0];
1295
                decode_mb_i(h);
1296
            } else
1297
                decode_mb_b(h,mb_type);
1298
        } while(next_mb(h));
1299
    }
1300
 done:
1301
    if(h->pic_type != FF_B_TYPE) {
1302
        if(h->DPB[1].data[0])
1303
            s->avctx->release_buffer(s->avctx, (AVFrame *)&h->DPB[1]);
1304
        memcpy(&h->DPB[1], &h->DPB[0], sizeof(Picture));
1305
        memcpy(&h->DPB[0], &h->picture, sizeof(Picture));
1306
        memset(&h->picture,0,sizeof(Picture));
1307
    }
1308
    return 0;
1309
}
1310

    
1311
/*****************************************************************************
1312
 *
1313
 * headers and interface
1314
 *
1315
 ****************************************************************************/
1316

    
1317
/**
1318
 * some predictions require data from the top-neighbouring macroblock.
1319
 * this data has to be stored for one complete row of macroblocks
1320
 * and this storage space is allocated here
1321
 */
1322
static void init_top_lines(AVSContext *h) {
1323
    /* alloc top line of predictors */
1324
    h->top_qp       = av_malloc( h->mb_width);
1325
    h->top_mv[0]    = av_malloc((h->mb_width*2+1)*sizeof(vector_t));
1326
    h->top_mv[1]    = av_malloc((h->mb_width*2+1)*sizeof(vector_t));
1327
    h->top_pred_Y   = av_malloc( h->mb_width*2*sizeof(*h->top_pred_Y));
1328
    h->top_border_y = av_malloc((h->mb_width+1)*16);
1329
    h->top_border_u = av_malloc((h->mb_width)*10);
1330
    h->top_border_v = av_malloc((h->mb_width)*10);
1331

    
1332
    /* alloc space for co-located MVs and types */
1333
    h->col_mv       = av_malloc( h->mb_width*h->mb_height*4*sizeof(vector_t));
1334
    h->col_type_base = av_malloc(h->mb_width*h->mb_height);
1335
}
1336

    
1337
static int decode_seq_header(AVSContext *h) {
1338
    MpegEncContext *s = &h->s;
1339
    extern const AVRational ff_frame_rate_tab[];
1340
    int frame_rate_code;
1341

    
1342
    h->profile =         get_bits(&s->gb,8);
1343
    h->level =           get_bits(&s->gb,8);
1344
    skip_bits1(&s->gb); //progressive sequence
1345
    s->width =           get_bits(&s->gb,14);
1346
    s->height =          get_bits(&s->gb,14);
1347
    skip_bits(&s->gb,2); //chroma format
1348
    skip_bits(&s->gb,3); //sample_precision
1349
    h->aspect_ratio =    get_bits(&s->gb,4);
1350
    frame_rate_code =    get_bits(&s->gb,4);
1351
    skip_bits(&s->gb,18);//bit_rate_lower
1352
    skip_bits1(&s->gb);  //marker_bit
1353
    skip_bits(&s->gb,12);//bit_rate_upper
1354
    s->low_delay =       get_bits1(&s->gb);
1355
    h->mb_width  = (s->width  + 15) >> 4;
1356
    h->mb_height = (s->height + 15) >> 4;
1357
    h->s.avctx->time_base.den = ff_frame_rate_tab[frame_rate_code].num;
1358
    h->s.avctx->time_base.num = ff_frame_rate_tab[frame_rate_code].den;
1359
    h->s.avctx->width  = s->width;
1360
    h->s.avctx->height = s->height;
1361
    if(!h->top_qp)
1362
        init_top_lines(h);
1363
    return 0;
1364
}
1365

    
1366
/**
1367
 * finds the end of the current frame in the bitstream.
1368
 * @return the position of the first byte of the next frame, or -1
1369
 */
1370
int ff_cavs_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) {
1371
    int pic_found, i;
1372
    uint32_t state;
1373

    
1374
    pic_found= pc->frame_start_found;
1375
    state= pc->state;
1376

    
1377
    i=0;
1378
    if(!pic_found){
1379
        for(i=0; i<buf_size; i++){
1380
            state= (state<<8) | buf[i];
1381
            if(state == PIC_I_START_CODE || state == PIC_PB_START_CODE){
1382
                i++;
1383
                pic_found=1;
1384
                break;
1385
            }
1386
        }
1387
    }
1388

    
1389
    if(pic_found){
1390
        /* EOF considered as end of frame */
1391
        if (buf_size == 0)
1392
            return 0;
1393
        for(; i<buf_size; i++){
1394
            state= (state<<8) | buf[i];
1395
            if((state&0xFFFFFF00) == 0x100){
1396
                if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
1397
                    pc->frame_start_found=0;
1398
                    pc->state=-1;
1399
                    return i-3;
1400
                }
1401
            }
1402
        }
1403
    }
1404
    pc->frame_start_found= pic_found;
1405
    pc->state= state;
1406
    return END_NOT_FOUND;
1407
}
1408

    
1409
void ff_cavs_flush(AVCodecContext * avctx) {
1410
    AVSContext *h = avctx->priv_data;
1411
    h->got_keyframe = 0;
1412
}
1413

    
1414
static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
1415
                             uint8_t * buf, int buf_size) {
1416
    AVSContext *h = avctx->priv_data;
1417
    MpegEncContext *s = &h->s;
1418
    int input_size;
1419
    const uint8_t *buf_end;
1420
    const uint8_t *buf_ptr;
1421
    AVFrame *picture = data;
1422
    uint32_t stc;
1423

    
1424
    s->avctx = avctx;
1425

    
1426
    if (buf_size == 0) {
1427
        if(!s->low_delay && h->DPB[0].data[0]) {
1428
            *data_size = sizeof(AVPicture);
1429
            *picture = *(AVFrame *) &h->DPB[0];
1430
        }
1431
        return 0;
1432
    }
1433

    
1434
    buf_ptr = buf;
1435
    buf_end = buf + buf_size;
1436
    for(;;) {
1437
        buf_ptr = ff_find_start_code(buf_ptr,buf_end, &stc);
1438
        if(stc & 0xFFFFFE00)
1439
            return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
1440
        input_size = (buf_end - buf_ptr)*8;
1441
        switch(stc) {
1442
        case SEQ_START_CODE:
1443
            init_get_bits(&s->gb, buf_ptr, input_size);
1444
            decode_seq_header(h);
1445
            break;
1446
        case PIC_I_START_CODE:
1447
            if(!h->got_keyframe) {
1448
                if(h->DPB[0].data[0])
1449
                    avctx->release_buffer(avctx, (AVFrame *)&h->DPB[0]);
1450
                if(h->DPB[1].data[0])
1451
                    avctx->release_buffer(avctx, (AVFrame *)&h->DPB[1]);
1452
                h->got_keyframe = 1;
1453
            }
1454
        case PIC_PB_START_CODE:
1455
            *data_size = 0;
1456
            if(!h->got_keyframe)
1457
                break;
1458
            init_get_bits(&s->gb, buf_ptr, input_size);
1459
            h->stc = stc;
1460
            if(decode_pic(h))
1461
                break;
1462
            *data_size = sizeof(AVPicture);
1463
            if(h->pic_type != FF_B_TYPE) {
1464
                if(h->DPB[1].data[0]) {
1465
                    *picture = *(AVFrame *) &h->DPB[1];
1466
                } else {
1467
                    *data_size = 0;
1468
                }
1469
            } else
1470
                *picture = *(AVFrame *) &h->picture;
1471
            break;
1472
        case EXT_START_CODE:
1473
            //mpeg_decode_extension(avctx,buf_ptr, input_size);
1474
            break;
1475
        case USER_START_CODE:
1476
            //mpeg_decode_user_data(avctx,buf_ptr, input_size);
1477
            break;
1478
        default:
1479
            if (stc >= SLICE_MIN_START_CODE &&
1480
                stc <= SLICE_MAX_START_CODE) {
1481
                init_get_bits(&s->gb, buf_ptr, input_size);
1482
                decode_slice_header(h, &s->gb);
1483
            }
1484
            break;
1485
        }
1486
    }
1487
}
1488

    
1489
static int cavs_decode_init(AVCodecContext * avctx) {
1490
    AVSContext *h = avctx->priv_data;
1491
    MpegEncContext * const s = &h->s;
1492

    
1493
    MPV_decode_defaults(s);
1494
    s->avctx = avctx;
1495

    
1496
    avctx->pix_fmt= PIX_FMT_YUV420P;
1497

    
1498
    h->luma_scan[0] = 0;
1499
    h->luma_scan[1] = 8;
1500
    h->intra_pred_l[      INTRA_L_VERT] = intra_pred_vert;
1501
    h->intra_pred_l[     INTRA_L_HORIZ] = intra_pred_horiz;
1502
    h->intra_pred_l[        INTRA_L_LP] = intra_pred_lp;
1503
    h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left;
1504
    h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
1505
    h->intra_pred_l[   INTRA_L_LP_LEFT] = intra_pred_lp_left;
1506
    h->intra_pred_l[    INTRA_L_LP_TOP] = intra_pred_lp_top;
1507
    h->intra_pred_l[    INTRA_L_DC_128] = intra_pred_dc_128;
1508
    h->intra_pred_c[        INTRA_C_LP] = intra_pred_lp;
1509
    h->intra_pred_c[     INTRA_C_HORIZ] = intra_pred_horiz;
1510
    h->intra_pred_c[      INTRA_C_VERT] = intra_pred_vert;
1511
    h->intra_pred_c[     INTRA_C_PLANE] = intra_pred_plane;
1512
    h->intra_pred_c[   INTRA_C_LP_LEFT] = intra_pred_lp_left;
1513
    h->intra_pred_c[    INTRA_C_LP_TOP] = intra_pred_lp_top;
1514
    h->intra_pred_c[    INTRA_C_DC_128] = intra_pred_dc_128;
1515
    h->mv[ 7] = un_mv;
1516
    h->mv[19] = un_mv;
1517
    return 0;
1518
}
1519

    
1520
static int cavs_decode_end(AVCodecContext * avctx) {
1521
    AVSContext *h = avctx->priv_data;
1522

    
1523
    av_free(h->top_qp);
1524
    av_free(h->top_mv[0]);
1525
    av_free(h->top_mv[1]);
1526
    av_free(h->top_pred_Y);
1527
    av_free(h->top_border_y);
1528
    av_free(h->top_border_u);
1529
    av_free(h->top_border_v);
1530
    av_free(h->col_mv);
1531
    av_free(h->col_type_base);
1532
    return 0;
1533
}
1534

    
1535
AVCodec cavs_decoder = {
1536
    "cavs",
1537
    CODEC_TYPE_VIDEO,
1538
    CODEC_ID_CAVS,
1539
    sizeof(AVSContext),
1540
    cavs_decode_init,
1541
    NULL,
1542
    cavs_decode_end,
1543
    cavs_decode_frame,
1544
    CODEC_CAP_DR1 | CODEC_CAP_DELAY,
1545
    .flush= ff_cavs_flush,
1546
};