GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/h263.c Lines: 184 195 94.4 %
Date: 2019-11-18 18:00:01 Branches: 120 124 96.8 %

Line Branch Exec Source
1
/*
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 * H.263/MPEG-4 backend for encoder and decoder
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 * Copyright (c) 2000,2001 Fabrice Bellard
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 * H.263+ support.
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 * Copyright (c) 2001 Juan J. Sierralta P
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
7
 *
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 * This file is part of FFmpeg.
9
 *
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 * FFmpeg is free software; you can redistribute it and/or
11
 * modify it under the terms of the GNU Lesser General Public
12
 * License as published by the Free Software Foundation; either
13
 * 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
18
 * 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
23
 */
24
25
/**
26
 * @file
27
 * H.263/MPEG-4 codec.
28
 */
29
30
#include <limits.h>
31
32
#include "avcodec.h"
33
#include "mpegvideo.h"
34
#include "h263.h"
35
#include "h263data.h"
36
#include "mathops.h"
37
#include "mpegutils.h"
38
#include "flv.h"
39
#include "mpeg4video.h"
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41
42
3349201
void ff_h263_update_motion_val(MpegEncContext * s){
43
3349201
    const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
44
               //FIXME a lot of that is only needed for !low_delay
45
3349201
    const int wrap = s->b8_stride;
46
3349201
    const int xy = s->block_index[0];
47
48
3349201
    s->current_picture.mbskip_table[mb_xy] = s->mb_skipped;
49
50
3349201
    if(s->mv_type != MV_TYPE_8X8){
51
        int motion_x, motion_y;
52
3145870
        if (s->mb_intra) {
53
493300
            motion_x = 0;
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493300
            motion_y = 0;
55
2652570
        } else if (s->mv_type == MV_TYPE_16X16) {
56
2652570
            motion_x = s->mv[0][0][0];
57
2652570
            motion_y = s->mv[0][0][1];
58
        } else /*if (s->mv_type == MV_TYPE_FIELD)*/ {
59
            int i;
60
            motion_x = s->mv[0][0][0] + s->mv[0][1][0];
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            motion_y = s->mv[0][0][1] + s->mv[0][1][1];
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            motion_x = (motion_x>>1) | (motion_x&1);
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            for(i=0; i<2; i++){
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                s->p_field_mv_table[i][0][mb_xy][0]= s->mv[0][i][0];
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                s->p_field_mv_table[i][0][mb_xy][1]= s->mv[0][i][1];
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            }
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            s->current_picture.ref_index[0][4*mb_xy    ] =
68
            s->current_picture.ref_index[0][4*mb_xy + 1] = s->field_select[0][0];
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            s->current_picture.ref_index[0][4*mb_xy + 2] =
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            s->current_picture.ref_index[0][4*mb_xy + 3] = s->field_select[0][1];
71
        }
72
73
        /* no update if 8X8 because it has been done during parsing */
74
3145870
        s->current_picture.motion_val[0][xy][0]            = motion_x;
75
3145870
        s->current_picture.motion_val[0][xy][1]            = motion_y;
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3145870
        s->current_picture.motion_val[0][xy + 1][0]        = motion_x;
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3145870
        s->current_picture.motion_val[0][xy + 1][1]        = motion_y;
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3145870
        s->current_picture.motion_val[0][xy + wrap][0]     = motion_x;
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3145870
        s->current_picture.motion_val[0][xy + wrap][1]     = motion_y;
80
3145870
        s->current_picture.motion_val[0][xy + 1 + wrap][0] = motion_x;
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3145870
        s->current_picture.motion_val[0][xy + 1 + wrap][1] = motion_y;
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    }
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3349201
    if(s->encoding){ //FIXME encoding MUST be cleaned up
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1299795
        if (s->mv_type == MV_TYPE_8X8)
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79330
            s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_8x8;
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1220465
        else if(s->mb_intra)
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208843
            s->current_picture.mb_type[mb_xy] = MB_TYPE_INTRA;
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        else
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1011622
            s->current_picture.mb_type[mb_xy] = MB_TYPE_L0 | MB_TYPE_16x16;
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    }
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3349201
}
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82098
int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
95
{
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    int x, y, wrap, a, c, pred_dc;
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    int16_t *dc_val;
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    /* find prediction */
100
82098
    if (n < 4) {
101
54732
        x = 2 * s->mb_x + (n & 1);
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54732
        y = 2 * s->mb_y + ((n & 2) >> 1);
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54732
        wrap = s->b8_stride;
104
54732
        dc_val = s->dc_val[0];
105
    } else {
106
27366
        x = s->mb_x;
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27366
        y = s->mb_y;
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27366
        wrap = s->mb_stride;
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27366
        dc_val = s->dc_val[n - 4 + 1];
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    }
111
    /* B C
112
     * A X
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     */
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82098
    a = dc_val[(x - 1) + (y) * wrap];
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82098
    c = dc_val[(x) + (y - 1) * wrap];
116
117
    /* No prediction outside GOB boundary */
118

82098
    if(s->first_slice_line && n!=3){
119
40365
        if(n!=2) c= 1024;
120

40365
        if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024;
121
    }
122
    /* just DC prediction */
123

82098
    if (a != 1024 && c != 1024)
124
47737
        pred_dc = (a + c) >> 1;
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34361
    else if (a != 1024)
126
29145
        pred_dc = a;
127
    else
128
5216
        pred_dc = c;
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130
    /* we assume pred is positive */
131
82098
    *dc_val_ptr = &dc_val[x + y * wrap];
132
82098
    return pred_dc;
133
}
134
135
260100
void ff_h263_loop_filter(MpegEncContext * s){
136
    int qp_c;
137
260100
    const int linesize  = s->linesize;
138
260100
    const int uvlinesize= s->uvlinesize;
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260100
    const int xy = s->mb_y * s->mb_stride + s->mb_x;
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260100
    uint8_t *dest_y = s->dest[0];
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260100
    uint8_t *dest_cb= s->dest[1];
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260100
    uint8_t *dest_cr= s->dest[2];
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144
    /*
145
       Diag Top
146
       Left Center
147
    */
148
260100
    if (!IS_SKIP(s->current_picture.mb_type[xy])) {
149
186447
        qp_c= s->qscale;
150
186447
        s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize,     linesize, qp_c);
151
186447
        s->h263dsp.h263_v_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
152
    }else
153
73653
        qp_c= 0;
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155
260100
    if(s->mb_y){
156
        int qp_dt, qp_tt, qp_tc;
157
158
244080
        if (IS_SKIP(s->current_picture.mb_type[xy - s->mb_stride]))
159
65553
            qp_tt=0;
160
        else
161
178527
            qp_tt = s->current_picture.qscale_table[xy - s->mb_stride];
162
163
244080
        if(qp_c)
164
178645
            qp_tc= qp_c;
165
        else
166
65435
            qp_tc= qp_tt;
167
168
244080
        if(qp_tc){
169
196681
            const int chroma_qp= s->chroma_qscale_table[qp_tc];
170
196681
            s->h263dsp.h263_v_loop_filter(dest_y,     linesize, qp_tc);
171
196681
            s->h263dsp.h263_v_loop_filter(dest_y + 8, linesize, qp_tc);
172
173
196681
            s->h263dsp.h263_v_loop_filter(dest_cb, uvlinesize, chroma_qp);
174
196681
            s->h263dsp.h263_v_loop_filter(dest_cr, uvlinesize, chroma_qp);
175
        }
176
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244080
        if(qp_tt)
178
178527
            s->h263dsp.h263_h_loop_filter(dest_y - 8 * linesize + 8, linesize, qp_tt);
179
180
244080
        if(s->mb_x){
181

232386
            if (qp_tt || IS_SKIP(s->current_picture.mb_type[xy - 1 - s->mb_stride]))
182
217435
                qp_dt= qp_tt;
183
            else
184
14951
                qp_dt = s->current_picture.qscale_table[xy - 1 - s->mb_stride];
185
186
232386
            if(qp_dt){
187
185782
                const int chroma_qp= s->chroma_qscale_table[qp_dt];
188
185782
                s->h263dsp.h263_h_loop_filter(dest_y  - 8 * linesize,   linesize,   qp_dt);
189
185782
                s->h263dsp.h263_h_loop_filter(dest_cb - 8 * uvlinesize, uvlinesize, chroma_qp);
190
185782
                s->h263dsp.h263_h_loop_filter(dest_cr - 8 * uvlinesize, uvlinesize, chroma_qp);
191
            }
192
        }
193
    }
194
195
260100
    if(qp_c){
196
186447
        s->h263dsp.h263_h_loop_filter(dest_y + 8, linesize, qp_c);
197
186447
        if(s->mb_y + 1 == s->mb_height)
198
7920
            s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize + 8, linesize, qp_c);
199
    }
200
201
260100
    if(s->mb_x){
202
        int qp_lc;
203

247635
        if (qp_c || IS_SKIP(s->current_picture.mb_type[xy - 1]))
204
232441
            qp_lc= qp_c;
205
        else
206
15194
            qp_lc = s->current_picture.qscale_table[xy - 1];
207
208
247635
        if(qp_lc){
209
193584
            s->h263dsp.h263_h_loop_filter(dest_y, linesize, qp_lc);
210
193584
            if(s->mb_y + 1 == s->mb_height){
211
7802
                const int chroma_qp= s->chroma_qscale_table[qp_lc];
212
7802
                s->h263dsp.h263_h_loop_filter(dest_y + 8 * linesize, linesize, qp_lc);
213
7802
                s->h263dsp.h263_h_loop_filter(dest_cb, uvlinesize, chroma_qp);
214
7802
                s->h263dsp.h263_h_loop_filter(dest_cr, uvlinesize, chroma_qp);
215
            }
216
        }
217
    }
218
260100
}
219
220
91098
void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n)
221
{
222
    int x, y, wrap, a, c, pred_dc, scale, i;
223
    int16_t *dc_val, *ac_val, *ac_val1;
224
225
    /* find prediction */
226
91098
    if (n < 4) {
227
60732
        x = 2 * s->mb_x + (n & 1);
228
60732
        y = 2 * s->mb_y + (n>> 1);
229
60732
        wrap = s->b8_stride;
230
60732
        dc_val = s->dc_val[0];
231
60732
        ac_val = s->ac_val[0][0];
232
60732
        scale = s->y_dc_scale;
233
    } else {
234
30366
        x = s->mb_x;
235
30366
        y = s->mb_y;
236
30366
        wrap = s->mb_stride;
237
30366
        dc_val = s->dc_val[n - 4 + 1];
238
30366
        ac_val = s->ac_val[n - 4 + 1][0];
239
30366
        scale = s->c_dc_scale;
240
    }
241
242
91098
    ac_val += ((y) * wrap + (x)) * 16;
243
91098
    ac_val1 = ac_val;
244
245
    /* B C
246
     * A X
247
     */
248
91098
    a = dc_val[(x - 1) + (y) * wrap];
249
91098
    c = dc_val[(x) + (y - 1) * wrap];
250
251
    /* No prediction outside GOB boundary */
252

91098
    if(s->first_slice_line && n!=3){
253
45145
        if(n!=2) c= 1024;
254

45145
        if(n!=1 && s->mb_x == s->resync_mb_x) a= 1024;
255
    }
256
257
91098
    if (s->ac_pred) {
258
4434
        pred_dc = 1024;
259
4434
        if (s->h263_aic_dir) {
260
            /* left prediction */
261
1596
            if (a != 1024) {
262
1576
                ac_val -= 16;
263
12608
                for(i=1;i<8;i++) {
264
11032
                    block[s->idsp.idct_permutation[i << 3]] += ac_val[i];
265
                }
266
1576
                pred_dc = a;
267
            }
268
        } else {
269
            /* top prediction */
270
2838
            if (c != 1024) {
271
1910
                ac_val -= 16 * wrap;
272
15280
                for(i=1;i<8;i++) {
273
13370
                    block[s->idsp.idct_permutation[i]] += ac_val[i + 8];
274
                }
275
1910
                pred_dc = c;
276
            }
277
        }
278
    } else {
279
        /* just DC prediction */
280

86664
        if (a != 1024 && c != 1024)
281
50003
            pred_dc = (a + c) >> 1;
282
36661
        else if (a != 1024)
283
31137
            pred_dc = a;
284
        else
285
5524
            pred_dc = c;
286
    }
287
288
    /* we assume pred is positive */
289
91098
    block[0]=block[0]*scale + pred_dc;
290
291
91098
    if (block[0] < 0)
292
        block[0] = 0;
293
    else
294
91098
        block[0] |= 1;
295
296
    /* Update AC/DC tables */
297
91098
    dc_val[(x) + (y) * wrap] = block[0];
298
299
    /* left copy */
300
728784
    for(i=1;i<8;i++)
301
637686
        ac_val1[i]     = block[s->idsp.idct_permutation[i << 3]];
302
    /* top copy */
303
728784
    for(i=1;i<8;i++)
304
637686
        ac_val1[8 + i] = block[s->idsp.idct_permutation[i]];
305
91098
}
306
307
3910395
int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,
308
                             int *px, int *py)
309
{
310
    int wrap;
311
    int16_t *A, *B, *C, (*mot_val)[2];
312
    static const int off[4]= {2, 1, 1, -1};
313
314
3910395
    wrap = s->b8_stride;
315
3910395
    mot_val = s->current_picture.motion_val[dir] + s->block_index[block];
316
317
3910395
    A = mot_val[ - 1];
318
    /* special case for first (slice) line */
319

3910395
    if (s->first_slice_line && block<3) {
320
        // we can't just change some MVs to simulate that as we need them for the B-frames (and ME)
321
        // and if we ever support non rectangular objects than we need to do a few ifs here anyway :(
322
389369
        if(block==0){ //most common case
323
313611
            if(s->mb_x  == s->resync_mb_x){ //rare
324
15181
                *px= *py = 0;
325

298430
            }else if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare
326
1859
                C = mot_val[off[block] - wrap];
327
1859
                if(s->mb_x==0){
328
118
                    *px = C[0];
329
118
                    *py = C[1];
330
                }else{
331
1741
                    *px = mid_pred(A[0], 0, C[0]);
332
1741
                    *py = mid_pred(A[1], 0, C[1]);
333
                }
334
            }else{
335
296571
                *px = A[0];
336
296571
                *py = A[1];
337
            }
338
75758
        }else if(block==1){
339

37879
            if(s->mb_x + 1 == s->resync_mb_x && s->h263_pred){ //rare
340
730
                C = mot_val[off[block] - wrap];
341
730
                *px = mid_pred(A[0], 0, C[0]);
342
730
                *py = mid_pred(A[1], 0, C[1]);
343
            }else{
344
37149
                *px = A[0];
345
37149
                *py = A[1];
346
            }
347
        }else{ /* block==2*/
348
37879
            B = mot_val[ - wrap];
349
37879
            C = mot_val[off[block] - wrap];
350
37879
            if(s->mb_x == s->resync_mb_x) //rare
351
2170
                A[0]=A[1]=0;
352
353
37879
            *px = mid_pred(A[0], B[0], C[0]);
354
37879
            *py = mid_pred(A[1], B[1], C[1]);
355
        }
356
    } else {
357
3521026
        B = mot_val[ - wrap];
358
3521026
        C = mot_val[off[block] - wrap];
359
3521026
        *px = mid_pred(A[0], B[0], C[0]);
360
3521026
        *py = mid_pred(A[1], B[1], C[1]);
361
    }
362
3910395
    return *mot_val;
363
}