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ffmpeg / libavcodec / cavs.c @ 5d2b15b8

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1
/*
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 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
3
 * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>
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 *
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 * This file is part of FFmpeg.
6
 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/**
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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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 */
27

    
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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 "cavs.h"
32
#include "cavsdata.h"
33

    
34
/*****************************************************************************
35
 *
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 * in-loop deblocking filter
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 *
38
 ****************************************************************************/
39

    
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static inline int get_bs(vector_t *mvP, vector_t *mvQ, int b) {
41
    if((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
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        return 2;
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    if( (abs(mvP->x - mvQ->x) >= 4) ||  (abs(mvP->y - mvQ->y) >= 4) )
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        return 1;
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    if(b){
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        mvP += MV_BWD_OFFS;
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        mvQ += MV_BWD_OFFS;
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        if( (abs(mvP->x - mvQ->x) >= 4) ||  (abs(mvP->y - mvQ->y) >= 4) )
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            return 1;
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    }else{
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        if(mvP->ref != mvQ->ref)
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            return 1;
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    }
54
    return 0;
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}
56

    
57
#define SET_PARAMS                                            \
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    alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset,0,63)];   \
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    beta  =  beta_tab[av_clip(qp_avg + h->beta_offset, 0,63)];   \
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    tc    =    tc_tab[av_clip(qp_avg + h->alpha_offset,0,63)];
61

    
62
/**
63
 * in-loop deblocking filter for a single macroblock
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 *
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 * boundary strength (bs) mapping:
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 *
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 * --4---5--
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 * 0   2   |
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 * | 6 | 7 |
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 * 1   3   |
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 * ---------
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 *
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 */
74
void ff_cavs_filter(AVSContext *h, enum mb_t mb_type) {
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    DECLARE_ALIGNED_8(uint8_t, bs[8]);
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    int qp_avg, alpha, beta, tc;
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    int i;
78

    
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    /* save un-deblocked lines */
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    h->topleft_border_y = h->top_border_y[h->mbx*16+15];
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    h->topleft_border_u = h->top_border_u[h->mbx*10+8];
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    h->topleft_border_v = h->top_border_v[h->mbx*10+8];
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    memcpy(&h->top_border_y[h->mbx*16], h->cy + 15* h->l_stride,16);
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    memcpy(&h->top_border_u[h->mbx*10+1], h->cu +  7* h->c_stride,8);
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    memcpy(&h->top_border_v[h->mbx*10+1], h->cv +  7* h->c_stride,8);
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    for(i=0;i<8;i++) {
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        h->left_border_y[i*2+1] = *(h->cy + 15 + (i*2+0)*h->l_stride);
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        h->left_border_y[i*2+2] = *(h->cy + 15 + (i*2+1)*h->l_stride);
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        h->left_border_u[i+1] = *(h->cu + 7 + i*h->c_stride);
90
        h->left_border_v[i+1] = *(h->cv + 7 + i*h->c_stride);
91
    }
92
    if(!h->loop_filter_disable) {
93
        /* determine bs */
94
        if(mb_type == I_8X8)
95
            *((uint64_t *)bs) = 0x0202020202020202ULL;
96
        else{
97
            *((uint64_t *)bs) = 0;
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            if(ff_cavs_partition_flags[mb_type] & SPLITV){
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                bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
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                bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
101
            }
102
            if(ff_cavs_partition_flags[mb_type] & SPLITH){
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                bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
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                bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
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            }
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            bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
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            bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
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            bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
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            bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
110
        }
111
        if( *((uint64_t *)bs) ) {
112
            if(h->flags & A_AVAIL) {
113
                qp_avg = (h->qp + h->left_qp + 1) >> 1;
114
                SET_PARAMS;
115
                h->s.dsp.cavs_filter_lv(h->cy,h->l_stride,alpha,beta,tc,bs[0],bs[1]);
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                h->s.dsp.cavs_filter_cv(h->cu,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
117
                h->s.dsp.cavs_filter_cv(h->cv,h->c_stride,alpha,beta,tc,bs[0],bs[1]);
118
            }
119
            qp_avg = h->qp;
120
            SET_PARAMS;
121
            h->s.dsp.cavs_filter_lv(h->cy + 8,h->l_stride,alpha,beta,tc,bs[2],bs[3]);
122
            h->s.dsp.cavs_filter_lh(h->cy + 8*h->l_stride,h->l_stride,alpha,beta,tc,
123
                           bs[6],bs[7]);
124

    
125
            if(h->flags & B_AVAIL) {
126
                qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
127
                SET_PARAMS;
128
                h->s.dsp.cavs_filter_lh(h->cy,h->l_stride,alpha,beta,tc,bs[4],bs[5]);
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                h->s.dsp.cavs_filter_ch(h->cu,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
130
                h->s.dsp.cavs_filter_ch(h->cv,h->c_stride,alpha,beta,tc,bs[4],bs[5]);
131
            }
132
        }
133
    }
134
    h->left_qp = h->qp;
135
    h->top_qp[h->mbx] = h->qp;
136
}
137

    
138
#undef SET_PARAMS
139

    
140
/*****************************************************************************
141
 *
142
 * spatial intra prediction
143
 *
144
 ****************************************************************************/
145

    
146
void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
147
                                        uint8_t **left, int block) {
148
    int i;
149

    
150
    switch(block) {
151
    case 0:
152
        *left = h->left_border_y;
153
        h->left_border_y[0] = h->left_border_y[1];
154
        memset(&h->left_border_y[17],h->left_border_y[16],9);
155
        memcpy(&top[1],&h->top_border_y[h->mbx*16],16);
156
        top[17] = top[16];
157
        top[0] = top[1];
158
        if((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
159
            h->left_border_y[0] = top[0] = h->topleft_border_y;
160
        break;
161
    case 1:
162
        *left = h->intern_border_y;
163
        for(i=0;i<8;i++)
164
            h->intern_border_y[i+1] = *(h->cy + 7 + i*h->l_stride);
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        memset(&h->intern_border_y[9],h->intern_border_y[8],9);
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        h->intern_border_y[0] = h->intern_border_y[1];
167
        memcpy(&top[1],&h->top_border_y[h->mbx*16+8],8);
168
        if(h->flags & C_AVAIL)
169
            memcpy(&top[9],&h->top_border_y[(h->mbx + 1)*16],8);
170
        else
171
            memset(&top[9],top[8],9);
172
        top[17] = top[16];
173
        top[0] = top[1];
174
        if(h->flags & B_AVAIL)
175
            h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx*16+7];
176
        break;
177
    case 2:
178
        *left = &h->left_border_y[8];
179
        memcpy(&top[1],h->cy + 7*h->l_stride,16);
180
        top[17] = top[16];
181
        top[0] = top[1];
182
        if(h->flags & A_AVAIL)
183
            top[0] = h->left_border_y[8];
184
        break;
185
    case 3:
186
        *left = &h->intern_border_y[8];
187
        for(i=0;i<8;i++)
188
            h->intern_border_y[i+9] = *(h->cy + 7 + (i+8)*h->l_stride);
189
        memset(&h->intern_border_y[17],h->intern_border_y[16],9);
190
        memcpy(&top[0],h->cy + 7 + 7*h->l_stride,9);
191
        memset(&top[9],top[8],9);
192
        break;
193
    }
194
}
195

    
196
void ff_cavs_load_intra_pred_chroma(AVSContext *h) {
197
    /* extend borders by one pixel */
198
    h->left_border_u[9] = h->left_border_u[8];
199
    h->left_border_v[9] = h->left_border_v[8];
200
    h->top_border_u[h->mbx*10+9] = h->top_border_u[h->mbx*10+8];
201
    h->top_border_v[h->mbx*10+9] = h->top_border_v[h->mbx*10+8];
202
    if(h->mbx && h->mby) {
203
        h->top_border_u[h->mbx*10] = h->left_border_u[0] = h->topleft_border_u;
204
        h->top_border_v[h->mbx*10] = h->left_border_v[0] = h->topleft_border_v;
205
    } else {
206
        h->left_border_u[0] = h->left_border_u[1];
207
        h->left_border_v[0] = h->left_border_v[1];
208
        h->top_border_u[h->mbx*10] = h->top_border_u[h->mbx*10+1];
209
        h->top_border_v[h->mbx*10] = h->top_border_v[h->mbx*10+1];
210
    }
211
}
212

    
213
static void intra_pred_vert(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
214
    int y;
215
    uint64_t a = unaligned64(&top[1]);
216
    for(y=0;y<8;y++) {
217
        *((uint64_t *)(d+y*stride)) = a;
218
    }
219
}
220

    
221
static void intra_pred_horiz(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
222
    int y;
223
    uint64_t a;
224
    for(y=0;y<8;y++) {
225
        a = left[y+1] * 0x0101010101010101ULL;
226
        *((uint64_t *)(d+y*stride)) = a;
227
    }
228
}
229

    
230
static void intra_pred_dc_128(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
231
    int y;
232
    uint64_t a = 0x8080808080808080ULL;
233
    for(y=0;y<8;y++)
234
        *((uint64_t *)(d+y*stride)) = a;
235
}
236

    
237
static void intra_pred_plane(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
238
    int x,y,ia;
239
    int ih = 0;
240
    int iv = 0;
241
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
242

    
243
    for(x=0; x<4; x++) {
244
        ih += (x+1)*(top[5+x]-top[3-x]);
245
        iv += (x+1)*(left[5+x]-left[3-x]);
246
    }
247
    ia = (top[8]+left[8])<<4;
248
    ih = (17*ih+16)>>5;
249
    iv = (17*iv+16)>>5;
250
    for(y=0; y<8; y++)
251
        for(x=0; x<8; x++)
252
            d[y*stride+x] = cm[(ia+(x-3)*ih+(y-3)*iv+16)>>5];
253
}
254

    
255
#define LOWPASS(ARRAY,INDEX)                                            \
256
    (( ARRAY[(INDEX)-1] + 2*ARRAY[(INDEX)] + ARRAY[(INDEX)+1] + 2) >> 2)
257

    
258
static void intra_pred_lp(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
259
    int x,y;
260
    for(y=0; y<8; y++)
261
        for(x=0; x<8; x++)
262
            d[y*stride+x] = (LOWPASS(top,x+1) + LOWPASS(left,y+1)) >> 1;
263
}
264

    
265
static void intra_pred_down_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
266
    int x,y;
267
    for(y=0; y<8; y++)
268
        for(x=0; x<8; x++)
269
            d[y*stride+x] = (LOWPASS(top,x+y+2) + LOWPASS(left,x+y+2)) >> 1;
270
}
271

    
272
static void intra_pred_down_right(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
273
    int x,y;
274
    for(y=0; y<8; y++)
275
        for(x=0; x<8; x++)
276
            if(x==y)
277
                d[y*stride+x] = (left[1]+2*top[0]+top[1]+2)>>2;
278
            else if(x>y)
279
                d[y*stride+x] = LOWPASS(top,x-y);
280
            else
281
                d[y*stride+x] = LOWPASS(left,y-x);
282
}
283

    
284
static void intra_pred_lp_left(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
285
    int x,y;
286
    for(y=0; y<8; y++)
287
        for(x=0; x<8; x++)
288
            d[y*stride+x] = LOWPASS(left,y+1);
289
}
290

    
291
static void intra_pred_lp_top(uint8_t *d,uint8_t *top,uint8_t *left,int stride) {
292
    int x,y;
293
    for(y=0; y<8; y++)
294
        for(x=0; x<8; x++)
295
            d[y*stride+x] = LOWPASS(top,x+1);
296
}
297

    
298
#undef LOWPASS
299

    
300
void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv) {
301
    /* save pred modes before they get modified */
302
    h->pred_mode_Y[3] =  h->pred_mode_Y[5];
303
    h->pred_mode_Y[6] =  h->pred_mode_Y[8];
304
    h->top_pred_Y[h->mbx*2+0] = h->pred_mode_Y[7];
305
    h->top_pred_Y[h->mbx*2+1] = h->pred_mode_Y[8];
306

    
307
    /* modify pred modes according to availability of neighbour samples */
308
    if(!(h->flags & A_AVAIL)) {
309
        modify_pred(ff_left_modifier_l, &h->pred_mode_Y[4] );
310
        modify_pred(ff_left_modifier_l, &h->pred_mode_Y[7] );
311
        modify_pred(ff_left_modifier_c, pred_mode_uv );
312
    }
313
    if(!(h->flags & B_AVAIL)) {
314
        modify_pred(ff_top_modifier_l, &h->pred_mode_Y[4] );
315
        modify_pred(ff_top_modifier_l, &h->pred_mode_Y[5] );
316
        modify_pred(ff_top_modifier_c, pred_mode_uv );
317
    }
318
}
319

    
320
/*****************************************************************************
321
 *
322
 * motion compensation
323
 *
324
 ****************************************************************************/
325

    
326
static inline void mc_dir_part(AVSContext *h,Picture *pic,int square,
327
                        int chroma_height,int delta,int list,uint8_t *dest_y,
328
                        uint8_t *dest_cb,uint8_t *dest_cr,int src_x_offset,
329
                        int src_y_offset,qpel_mc_func *qpix_op,
330
                        h264_chroma_mc_func chroma_op,vector_t *mv){
331
    MpegEncContext * const s = &h->s;
332
    const int mx= mv->x + src_x_offset*8;
333
    const int my= mv->y + src_y_offset*8;
334
    const int luma_xy= (mx&3) + ((my&3)<<2);
335
    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->l_stride;
336
    uint8_t * src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->c_stride;
337
    uint8_t * src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->c_stride;
338
    int extra_width= 0; //(s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
339
    int extra_height= extra_width;
340
    int emu=0;
341
    const int full_mx= mx>>2;
342
    const int full_my= my>>2;
343
    const int pic_width  = 16*h->mb_width;
344
    const int pic_height = 16*h->mb_height;
345

    
346
    if(!pic->data[0])
347
        return;
348
    if(mx&7) extra_width -= 3;
349
    if(my&7) extra_height -= 3;
350

    
351
    if(   full_mx < 0-extra_width
352
          || full_my < 0-extra_height
353
          || full_mx + 16/*FIXME*/ > pic_width + extra_width
354
          || full_my + 16/*FIXME*/ > pic_height + extra_height){
355
        ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->l_stride, h->l_stride,
356
                            16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
357
        src_y= s->edge_emu_buffer + 2 + 2*h->l_stride;
358
        emu=1;
359
    }
360

    
361
    qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps?
362
    if(!square){
363
        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->l_stride);
364
    }
365

    
366
    if(emu){
367
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->c_stride,
368
                            9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
369
        src_cb= s->edge_emu_buffer;
370
    }
371
    chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx&7, my&7);
372

    
373
    if(emu){
374
        ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->c_stride,
375
                            9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
376
        src_cr= s->edge_emu_buffer;
377
    }
378
    chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx&7, my&7);
379
}
380

    
381
static inline void mc_part_std(AVSContext *h,int square,int chroma_height,int delta,
382
                        uint8_t *dest_y,uint8_t *dest_cb,uint8_t *dest_cr,
383
                        int x_offset, int y_offset,qpel_mc_func *qpix_put,
384
                        h264_chroma_mc_func chroma_put,qpel_mc_func *qpix_avg,
385
                        h264_chroma_mc_func chroma_avg, vector_t *mv){
386
    qpel_mc_func *qpix_op=  qpix_put;
387
    h264_chroma_mc_func chroma_op= chroma_put;
388

    
389
    dest_y  += 2*x_offset + 2*y_offset*h->l_stride;
390
    dest_cb +=   x_offset +   y_offset*h->c_stride;
391
    dest_cr +=   x_offset +   y_offset*h->c_stride;
392
    x_offset += 8*h->mbx;
393
    y_offset += 8*h->mby;
394

    
395
    if(mv->ref >= 0){
396
        Picture *ref= &h->DPB[mv->ref];
397
        mc_dir_part(h, ref, square, chroma_height, delta, 0,
398
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
399
                    qpix_op, chroma_op, mv);
400

    
401
        qpix_op=  qpix_avg;
402
        chroma_op= chroma_avg;
403
    }
404

    
405
    if((mv+MV_BWD_OFFS)->ref >= 0){
406
        Picture *ref= &h->DPB[0];
407
        mc_dir_part(h, ref, square, chroma_height, delta, 1,
408
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
409
                    qpix_op, chroma_op, mv+MV_BWD_OFFS);
410
    }
411
}
412

    
413
void ff_cavs_inter(AVSContext *h, enum mb_t mb_type) {
414
    if(ff_cavs_partition_flags[mb_type] == 0){ // 16x16
415
        mc_part_std(h, 1, 8, 0, h->cy, h->cu, h->cv, 0, 0,
416
                h->s.dsp.put_cavs_qpel_pixels_tab[0],
417
                h->s.dsp.put_h264_chroma_pixels_tab[0],
418
                h->s.dsp.avg_cavs_qpel_pixels_tab[0],
419
                h->s.dsp.avg_h264_chroma_pixels_tab[0],&h->mv[MV_FWD_X0]);
420
    }else{
421
        mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 0,
422
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
423
                h->s.dsp.put_h264_chroma_pixels_tab[1],
424
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
425
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X0]);
426
        mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 0,
427
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
428
                h->s.dsp.put_h264_chroma_pixels_tab[1],
429
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
430
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X1]);
431
        mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 0, 4,
432
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
433
                h->s.dsp.put_h264_chroma_pixels_tab[1],
434
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
435
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X2]);
436
        mc_part_std(h, 1, 4, 0, h->cy, h->cu, h->cv, 4, 4,
437
                h->s.dsp.put_cavs_qpel_pixels_tab[1],
438
                h->s.dsp.put_h264_chroma_pixels_tab[1],
439
                h->s.dsp.avg_cavs_qpel_pixels_tab[1],
440
                h->s.dsp.avg_h264_chroma_pixels_tab[1],&h->mv[MV_FWD_X3]);
441
    }
442
}
443

    
444
/*****************************************************************************
445
 *
446
 * motion vector prediction
447
 *
448
 ****************************************************************************/
449

    
450
static inline void scale_mv(AVSContext *h, int *d_x, int *d_y, vector_t *src, int distp) {
451
    int den = h->scale_den[src->ref];
452

    
453
    *d_x = (src->x*distp*den + 256 + (src->x>>31)) >> 9;
454
    *d_y = (src->y*distp*den + 256 + (src->y>>31)) >> 9;
455
}
456

    
457
static inline void mv_pred_median(AVSContext *h, vector_t *mvP, vector_t *mvA, vector_t *mvB, vector_t *mvC) {
458
    int ax, ay, bx, by, cx, cy;
459
    int len_ab, len_bc, len_ca, len_mid;
460

    
461
    /* scale candidates according to their temporal span */
462
    scale_mv(h, &ax, &ay, mvA, mvP->dist);
463
    scale_mv(h, &bx, &by, mvB, mvP->dist);
464
    scale_mv(h, &cx, &cy, mvC, mvP->dist);
465
    /* find the geometrical median of the three candidates */
466
    len_ab = abs(ax - bx) + abs(ay - by);
467
    len_bc = abs(bx - cx) + abs(by - cy);
468
    len_ca = abs(cx - ax) + abs(cy - ay);
469
    len_mid = mid_pred(len_ab, len_bc, len_ca);
470
    if(len_mid == len_ab) {
471
        mvP->x = cx;
472
        mvP->y = cy;
473
    } else if(len_mid == len_bc) {
474
        mvP->x = ax;
475
        mvP->y = ay;
476
    } else {
477
        mvP->x = bx;
478
        mvP->y = by;
479
    }
480
}
481

    
482
void ff_cavs_mv(AVSContext *h, enum mv_loc_t nP, enum mv_loc_t nC,
483
                enum mv_pred_t mode, enum block_t size, int ref) {
484
    vector_t *mvP = &h->mv[nP];
485
    vector_t *mvA = &h->mv[nP-1];
486
    vector_t *mvB = &h->mv[nP-4];
487
    vector_t *mvC = &h->mv[nC];
488
    const vector_t *mvP2 = NULL;
489

    
490
    mvP->ref = ref;
491
    mvP->dist = h->dist[mvP->ref];
492
    if(mvC->ref == NOT_AVAIL)
493
        mvC = &h->mv[nP-5]; // set to top-left (mvD)
494
    if((mode == MV_PRED_PSKIP) &&
495
       ((mvA->ref == NOT_AVAIL) || (mvB->ref == NOT_AVAIL) ||
496
           ((mvA->x | mvA->y | mvA->ref) == 0)  ||
497
           ((mvB->x | mvB->y | mvB->ref) == 0) )) {
498
        mvP2 = &ff_cavs_un_mv;
499
    /* if there is only one suitable candidate, take it */
500
    } else if((mvA->ref >= 0) && (mvB->ref < 0) && (mvC->ref < 0)) {
501
        mvP2= mvA;
502
    } else if((mvA->ref < 0) && (mvB->ref >= 0) && (mvC->ref < 0)) {
503
        mvP2= mvB;
504
    } else if((mvA->ref < 0) && (mvB->ref < 0) && (mvC->ref >= 0)) {
505
        mvP2= mvC;
506
    } else if(mode == MV_PRED_LEFT     && mvA->ref == ref){
507
        mvP2= mvA;
508
    } else if(mode == MV_PRED_TOP      && mvB->ref == ref){
509
        mvP2= mvB;
510
    } else if(mode == MV_PRED_TOPRIGHT && mvC->ref == ref){
511
        mvP2= mvC;
512
    }
513
    if(mvP2){
514
        mvP->x = mvP2->x;
515
        mvP->y = mvP2->y;
516
    }else
517
        mv_pred_median(h, mvP, mvA, mvB, mvC);
518

    
519
    if(mode < MV_PRED_PSKIP) {
520
        mvP->x += get_se_golomb(&h->s.gb);
521
        mvP->y += get_se_golomb(&h->s.gb);
522
    }
523
    set_mvs(mvP,size);
524
}
525

    
526
/*****************************************************************************
527
 *
528
 * macroblock level
529
 *
530
 ****************************************************************************/
531

    
532
/**
533
 * initialise predictors for motion vectors and intra prediction
534
 */
535
void ff_cavs_init_mb(AVSContext *h) {
536
    int i;
537

    
538
    /* copy predictors from top line (MB B and C) into cache */
539
    for(i=0;i<3;i++) {
540
        h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i];
541
        h->mv[MV_BWD_B2+i] = h->top_mv[1][h->mbx*2+i];
542
    }
543
    h->pred_mode_Y[1] = h->top_pred_Y[h->mbx*2+0];
544
    h->pred_mode_Y[2] = h->top_pred_Y[h->mbx*2+1];
545
    /* clear top predictors if MB B is not available */
546
    if(!(h->flags & B_AVAIL)) {
547
        h->mv[MV_FWD_B2] = ff_cavs_un_mv;
548
        h->mv[MV_FWD_B3] = ff_cavs_un_mv;
549
        h->mv[MV_BWD_B2] = ff_cavs_un_mv;
550
        h->mv[MV_BWD_B3] = ff_cavs_un_mv;
551
        h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
552
        h->flags &= ~(C_AVAIL|D_AVAIL);
553
    } else if(h->mbx) {
554
        h->flags |= D_AVAIL;
555
    }
556
    if(h->mbx == h->mb_width-1) //MB C not available
557
        h->flags &= ~C_AVAIL;
558
    /* clear top-right predictors if MB C is not available */
559
    if(!(h->flags & C_AVAIL)) {
560
        h->mv[MV_FWD_C2] = ff_cavs_un_mv;
561
        h->mv[MV_BWD_C2] = ff_cavs_un_mv;
562
    }
563
    /* clear top-left predictors if MB D is not available */
564
    if(!(h->flags & D_AVAIL)) {
565
        h->mv[MV_FWD_D3] = ff_cavs_un_mv;
566
        h->mv[MV_BWD_D3] = ff_cavs_un_mv;
567
    }
568
    /* set pointer for co-located macroblock type */
569
    h->col_type = &h->col_type_base[h->mby*h->mb_width + h->mbx];
570
}
571

    
572
/**
573
 * save predictors for later macroblocks and increase
574
 * macroblock address
575
 * @returns 0 if end of frame is reached, 1 otherwise
576
 */
577
int ff_cavs_next_mb(AVSContext *h) {
578
    int i;
579

    
580
    h->flags |= A_AVAIL;
581
    h->cy += 16;
582
    h->cu += 8;
583
    h->cv += 8;
584
    /* copy mvs as predictors to the left */
585
    for(i=0;i<=20;i+=4)
586
        h->mv[i] = h->mv[i+2];
587
    /* copy bottom mvs from cache to top line */
588
    h->top_mv[0][h->mbx*2+0] = h->mv[MV_FWD_X2];
589
    h->top_mv[0][h->mbx*2+1] = h->mv[MV_FWD_X3];
590
    h->top_mv[1][h->mbx*2+0] = h->mv[MV_BWD_X2];
591
    h->top_mv[1][h->mbx*2+1] = h->mv[MV_BWD_X3];
592
    /* next MB address */
593
    h->mbx++;
594
    if(h->mbx == h->mb_width) { //new mb line
595
        h->flags = B_AVAIL|C_AVAIL;
596
        /* clear left pred_modes */
597
        h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
598
        /* clear left mv predictors */
599
        for(i=0;i<=20;i+=4)
600
            h->mv[i] = ff_cavs_un_mv;
601
        h->mbx = 0;
602
        h->mby++;
603
        /* re-calculate sample pointers */
604
        h->cy = h->picture.data[0] + h->mby*16*h->l_stride;
605
        h->cu = h->picture.data[1] + h->mby*8*h->c_stride;
606
        h->cv = h->picture.data[2] + h->mby*8*h->c_stride;
607
        if(h->mby == h->mb_height) { //frame end
608
            return 0;
609
        } else {
610
            //check_for_slice(h);
611
        }
612
    }
613
    return 1;
614
}
615

    
616
/*****************************************************************************
617
 *
618
 * frame level
619
 *
620
 ****************************************************************************/
621

    
622
void ff_cavs_init_pic(AVSContext *h) {
623
    int i;
624

    
625
    /* clear some predictors */
626
    for(i=0;i<=20;i+=4)
627
        h->mv[i] = ff_cavs_un_mv;
628
    h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
629
    set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
630
    h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
631
    set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
632
    h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
633
    h->cy = h->picture.data[0];
634
    h->cu = h->picture.data[1];
635
    h->cv = h->picture.data[2];
636
    h->l_stride = h->picture.linesize[0];
637
    h->c_stride = h->picture.linesize[1];
638
    h->luma_scan[2] = 8*h->l_stride;
639
    h->luma_scan[3] = 8*h->l_stride+8;
640
    h->mbx = h->mby = 0;
641
    h->flags = 0;
642
}
643

    
644
/*****************************************************************************
645
 *
646
 * headers and interface
647
 *
648
 ****************************************************************************/
649

    
650
/**
651
 * some predictions require data from the top-neighbouring macroblock.
652
 * this data has to be stored for one complete row of macroblocks
653
 * and this storage space is allocated here
654
 */
655
void ff_cavs_init_top_lines(AVSContext *h) {
656
    /* alloc top line of predictors */
657
    h->top_qp       = av_malloc( h->mb_width);
658
    h->top_mv[0]    = av_malloc((h->mb_width*2+1)*sizeof(vector_t));
659
    h->top_mv[1]    = av_malloc((h->mb_width*2+1)*sizeof(vector_t));
660
    h->top_pred_Y   = av_malloc( h->mb_width*2*sizeof(*h->top_pred_Y));
661
    h->top_border_y = av_malloc((h->mb_width+1)*16);
662
    h->top_border_u = av_malloc((h->mb_width)*10);
663
    h->top_border_v = av_malloc((h->mb_width)*10);
664

    
665
    /* alloc space for co-located MVs and types */
666
    h->col_mv       = av_malloc( h->mb_width*h->mb_height*4*sizeof(vector_t));
667
    h->col_type_base = av_malloc(h->mb_width*h->mb_height);
668
    h->block        = av_mallocz(64*sizeof(DCTELEM));
669
}
670

    
671
int ff_cavs_init(AVCodecContext *avctx) {
672
    AVSContext *h = avctx->priv_data;
673
    MpegEncContext * const s = &h->s;
674

    
675
    MPV_decode_defaults(s);
676
    s->avctx = avctx;
677

    
678
    avctx->pix_fmt= PIX_FMT_YUV420P;
679

    
680
    h->luma_scan[0] = 0;
681
    h->luma_scan[1] = 8;
682
    h->intra_pred_l[      INTRA_L_VERT] = intra_pred_vert;
683
    h->intra_pred_l[     INTRA_L_HORIZ] = intra_pred_horiz;
684
    h->intra_pred_l[        INTRA_L_LP] = intra_pred_lp;
685
    h->intra_pred_l[ INTRA_L_DOWN_LEFT] = intra_pred_down_left;
686
    h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
687
    h->intra_pred_l[   INTRA_L_LP_LEFT] = intra_pred_lp_left;
688
    h->intra_pred_l[    INTRA_L_LP_TOP] = intra_pred_lp_top;
689
    h->intra_pred_l[    INTRA_L_DC_128] = intra_pred_dc_128;
690
    h->intra_pred_c[        INTRA_C_LP] = intra_pred_lp;
691
    h->intra_pred_c[     INTRA_C_HORIZ] = intra_pred_horiz;
692
    h->intra_pred_c[      INTRA_C_VERT] = intra_pred_vert;
693
    h->intra_pred_c[     INTRA_C_PLANE] = intra_pred_plane;
694
    h->intra_pred_c[   INTRA_C_LP_LEFT] = intra_pred_lp_left;
695
    h->intra_pred_c[    INTRA_C_LP_TOP] = intra_pred_lp_top;
696
    h->intra_pred_c[    INTRA_C_DC_128] = intra_pred_dc_128;
697
    h->mv[ 7] = ff_cavs_un_mv;
698
    h->mv[19] = ff_cavs_un_mv;
699
    return 0;
700
}
701

    
702
int ff_cavs_end(AVCodecContext *avctx) {
703
    AVSContext *h = avctx->priv_data;
704

    
705
    av_free(h->top_qp);
706
    av_free(h->top_mv[0]);
707
    av_free(h->top_mv[1]);
708
    av_free(h->top_pred_Y);
709
    av_free(h->top_border_y);
710
    av_free(h->top_border_u);
711
    av_free(h->top_border_v);
712
    av_free(h->col_mv);
713
    av_free(h->col_type_base);
714
    av_free(h->block);
715
    return 0;
716
}