FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/wmv2dec.c
Date: 2022-08-10 20:23:34
Exec Total Coverage
Lines: 280 313 89.5%
Branches: 154 189 81.5%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2002 The FFmpeg Project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "libavutil/mem_internal.h"
22
23 #include "avcodec.h"
24 #include "codec_internal.h"
25 #include "h263dec.h"
26 #include "intrax8.h"
27 #include "mathops.h"
28 #include "mpegutils.h"
29 #include "mpegvideo.h"
30 #include "msmpeg4.h"
31 #include "msmpeg4data.h"
32 #include "msmpeg4dec.h"
33 #include "simple_idct.h"
34 #include "wmv2.h"
35 #include "wmv2data.h"
36 #include "wmv2dec.h"
37
38 typedef struct WMV2DecContext {
39 MpegEncContext s;
40 WMV2Context common;
41 IntraX8Context x8;
42 int j_type_bit;
43 int j_type;
44 int abt_flag;
45 int abt_type;
46 int abt_type_table[6];
47 int per_mb_abt;
48 int per_block_abt;
49 int mspel_bit;
50 int cbp_table_index;
51 int top_left_mv_flag;
52 int per_mb_rl_bit;
53 int skip_type;
54
55 ScanTable abt_scantable[2];
56 DECLARE_ALIGNED(32, int16_t, abt_block2)[6][64];
57 } WMV2DecContext;
58
59 1140894 static void wmv2_add_block(WMV2DecContext *w, int16_t *block1,
60 uint8_t *dst, int stride, int n)
61 {
62 1140894 MpegEncContext *const s = &w->s;
63
64
2/2
✓ Branch 0 taken 180589 times.
✓ Branch 1 taken 960305 times.
1140894 if (s->block_last_index[n] >= 0) {
65
3/4
✓ Branch 0 taken 149142 times.
✓ Branch 1 taken 16469 times.
✓ Branch 2 taken 14978 times.
✗ Branch 3 not taken.
180589 switch (w->abt_type_table[n]) {
66 149142 case 0:
67 149142 w->common.wdsp.idct_add(dst, stride, block1);
68 149142 break;
69 16469 case 1:
70 16469 ff_simple_idct84_add(dst, stride, block1);
71 16469 ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
72 16469 s->bdsp.clear_block(w->abt_block2[n]);
73 16469 break;
74 14978 case 2:
75 14978 ff_simple_idct48_add(dst, stride, block1);
76 14978 ff_simple_idct48_add(dst + 4, stride, w->abt_block2[n]);
77 14978 s->bdsp.clear_block(w->abt_block2[n]);
78 14978 break;
79 default:
80 av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
81 }
82 }
83 1140894 }
84
85 190149 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
86 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
87 {
88 190149 WMV2DecContext *const w = (WMV2DecContext *) s;
89
90 190149 wmv2_add_block(w, block1[0], dest_y, s->linesize, 0);
91 190149 wmv2_add_block(w, block1[1], dest_y + 8, s->linesize, 1);
92 190149 wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize, s->linesize, 2);
93 190149 wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
94
95
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 190149 times.
190149 if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
96 return;
97
98 190149 wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
99 190149 wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
100 }
101
102 645 static int parse_mb_skip(WMV2DecContext *w)
103 {
104 int mb_x, mb_y;
105 645 int coded_mb_count = 0;
106 645 MpegEncContext *const s = &w->s;
107 645 uint32_t *const mb_type = s->current_picture_ptr->mb_type;
108
109 645 w->skip_type = get_bits(&s->gb, 2);
110
4/5
✓ Branch 0 taken 230 times.
✓ Branch 1 taken 28 times.
✓ Branch 2 taken 354 times.
✓ Branch 3 taken 33 times.
✗ Branch 4 not taken.
645 switch (w->skip_type) {
111 230 case SKIP_TYPE_NONE:
112
2/2
✓ Branch 0 taken 3315 times.
✓ Branch 1 taken 230 times.
3545 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
113
2/2
✓ Branch 0 taken 68865 times.
✓ Branch 1 taken 3315 times.
72180 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
114 68865 mb_type[mb_y * s->mb_stride + mb_x] =
115 MB_TYPE_16x16 | MB_TYPE_L0;
116 230 break;
117 28 case SKIP_TYPE_MPEG:
118
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 28 times.
28 if (get_bits_left(&s->gb) < s->mb_height * s->mb_width)
119 return AVERROR_INVALIDDATA;
120
2/2
✓ Branch 0 taken 420 times.
✓ Branch 1 taken 28 times.
448 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
121
2/2
✓ Branch 0 taken 8400 times.
✓ Branch 1 taken 420 times.
8820 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
122 8400 mb_type[mb_y * s->mb_stride + mb_x] =
123
2/2
✓ Branch 1 taken 5149 times.
✓ Branch 2 taken 3251 times.
8400 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
124 28 break;
125 354 case SKIP_TYPE_ROW:
126
2/2
✓ Branch 0 taken 5310 times.
✓ Branch 1 taken 354 times.
5664 for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
127
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 5310 times.
5310 if (get_bits_left(&s->gb) < 1)
128 return AVERROR_INVALIDDATA;
129
2/2
✓ Branch 1 taken 820 times.
✓ Branch 2 taken 4490 times.
5310 if (get_bits1(&s->gb)) {
130
2/2
✓ Branch 0 taken 16400 times.
✓ Branch 1 taken 820 times.
17220 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
131 16400 mb_type[mb_y * s->mb_stride + mb_x] =
132 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
133 } else {
134
2/2
✓ Branch 0 taken 89800 times.
✓ Branch 1 taken 4490 times.
94290 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
135 89800 mb_type[mb_y * s->mb_stride + mb_x] =
136
2/2
✓ Branch 1 taken 42505 times.
✓ Branch 2 taken 47295 times.
89800 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
137 }
138 }
139 354 break;
140 33 case SKIP_TYPE_COL:
141
2/2
✓ Branch 0 taken 660 times.
✓ Branch 1 taken 33 times.
693 for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
142
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 660 times.
660 if (get_bits_left(&s->gb) < 1)
143 return AVERROR_INVALIDDATA;
144
2/2
✓ Branch 1 taken 171 times.
✓ Branch 2 taken 489 times.
660 if (get_bits1(&s->gb)) {
145
2/2
✓ Branch 0 taken 2565 times.
✓ Branch 1 taken 171 times.
2736 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
146 2565 mb_type[mb_y * s->mb_stride + mb_x] =
147 MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
148 } else {
149
2/2
✓ Branch 0 taken 7335 times.
✓ Branch 1 taken 489 times.
7824 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
150 7335 mb_type[mb_y * s->mb_stride + mb_x] =
151
2/2
✓ Branch 1 taken 5106 times.
✓ Branch 2 taken 2229 times.
7335 (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
152 }
153 }
154 33 break;
155 }
156
157
2/2
✓ Branch 0 taken 9540 times.
✓ Branch 1 taken 645 times.
10185 for (mb_y = 0; mb_y < s->mb_height; mb_y++)
158
2/2
✓ Branch 0 taken 193365 times.
✓ Branch 1 taken 9540 times.
202905 for (mb_x = 0; mb_x < s->mb_width; mb_x++)
159 193365 coded_mb_count += !IS_SKIP(mb_type[mb_y * s->mb_stride + mb_x]);
160
161
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 645 times.
645 if (coded_mb_count > get_bits_left(&s->gb))
162 return AVERROR_INVALIDDATA;
163
164 645 return 0;
165 }
166
167 5 static int decode_ext_header(WMV2DecContext *w)
168 {
169 5 MpegEncContext *const s = &w->s;
170 GetBitContext gb;
171 int fps;
172 int code;
173
174
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5 times.
5 if (s->avctx->extradata_size < 4)
175 return AVERROR_INVALIDDATA;
176
177 5 init_get_bits(&gb, s->avctx->extradata, 32);
178
179 5 fps = get_bits(&gb, 5);
180 5 s->bit_rate = get_bits(&gb, 11) * 1024;
181 5 w->mspel_bit = get_bits1(&gb);
182 5 s->loop_filter = get_bits1(&gb);
183 5 w->abt_flag = get_bits1(&gb);
184 5 w->j_type_bit = get_bits1(&gb);
185 5 w->top_left_mv_flag = get_bits1(&gb);
186 5 w->per_mb_rl_bit = get_bits1(&gb);
187 5 code = get_bits(&gb, 3);
188
189
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5 times.
5 if (code == 0)
190 return AVERROR_INVALIDDATA;
191
192 5 s->slice_height = s->mb_height / code;
193
194
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5 times.
5 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
195 av_log(s->avctx, AV_LOG_DEBUG,
196 "fps:%d, br:%"PRId64", qpbit:%d, abt_flag:%d, j_type_bit:%d, "
197 "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, "
198 "slices:%d\n",
199 fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit,
200 w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter,
201 code);
202 5 return 0;
203 }
204
205 674 int ff_wmv2_decode_picture_header(MpegEncContext *s)
206 {
207 674 WMV2DecContext *const w = (WMV2DecContext *) s;
208 int code;
209
210
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 669 times.
674 if (s->picture_number == 0)
211 5 decode_ext_header(w);
212
213 674 s->pict_type = get_bits1(&s->gb) + 1;
214
2/2
✓ Branch 0 taken 29 times.
✓ Branch 1 taken 645 times.
674 if (s->pict_type == AV_PICTURE_TYPE_I) {
215 29 code = get_bits(&s->gb, 7);
216 29 av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
217 }
218 674 s->chroma_qscale = s->qscale = get_bits(&s->gb, 5);
219
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 674 times.
674 if (s->qscale <= 0)
220 return AVERROR_INVALIDDATA;
221
222
4/4
✓ Branch 0 taken 645 times.
✓ Branch 1 taken 29 times.
✓ Branch 3 taken 387 times.
✓ Branch 4 taken 258 times.
674 if (s->pict_type != AV_PICTURE_TYPE_I && show_bits(&s->gb, 1)) {
223 387 GetBitContext gb = s->gb;
224 387 int skip_type = get_bits(&gb, 2);
225
2/2
✓ Branch 0 taken 33 times.
✓ Branch 1 taken 354 times.
387 int run = skip_type == SKIP_TYPE_COL ? s->mb_width : s->mb_height;
226
227
1/2
✓ Branch 0 taken 387 times.
✗ Branch 1 not taken.
387 while (run > 0) {
228 387 int block = FFMIN(run, 25);
229
1/2
✓ Branch 1 taken 387 times.
✗ Branch 2 not taken.
387 if (get_bits(&gb, block) + 1 != 1<<block)
230 387 break;
231 run -= block;
232 }
233
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 387 times.
387 if (!run)
234 return FRAME_SKIPPED;
235 }
236
237 674 return 0;
238 }
239
240 674 int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
241 {
242 674 WMV2DecContext *const w = (WMV2DecContext *) s;
243
244
2/2
✓ Branch 0 taken 29 times.
✓ Branch 1 taken 645 times.
674 if (s->pict_type == AV_PICTURE_TYPE_I) {
245
1/2
✓ Branch 0 taken 29 times.
✗ Branch 1 not taken.
29 if (w->j_type_bit)
246 29 w->j_type = get_bits1(&s->gb);
247 else
248 w->j_type = 0; // FIXME check
249
250
2/2
✓ Branch 0 taken 26 times.
✓ Branch 1 taken 3 times.
29 if (!w->j_type) {
251
1/2
✓ Branch 0 taken 26 times.
✗ Branch 1 not taken.
26 if (w->per_mb_rl_bit)
252 26 s->per_mb_rl_table = get_bits1(&s->gb);
253 else
254 s->per_mb_rl_table = 0;
255
256
1/2
✓ Branch 0 taken 26 times.
✗ Branch 1 not taken.
26 if (!s->per_mb_rl_table) {
257 26 s->rl_chroma_table_index = decode012(&s->gb);
258 26 s->rl_table_index = decode012(&s->gb);
259 }
260
261 26 s->dc_table_index = get_bits1(&s->gb);
262
263 // at minimum one bit per macroblock is required at least in a valid frame,
264 // we discard frames much smaller than this. Frames smaller than 1/8 of the
265 // smallest "black/skip" frame generally contain not much recoverable content
266 // while at the same time they have the highest computational requirements
267 // per byte
268
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 26 times.
26 if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16))
269 return AVERROR_INVALIDDATA;
270 }
271 29 s->inter_intra_pred = 0;
272 29 s->no_rounding = 1;
273
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 29 times.
29 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
274 av_log(s->avctx, AV_LOG_DEBUG,
275 "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
276 s->qscale, s->rl_chroma_table_index, s->rl_table_index,
277 s->dc_table_index, s->per_mb_rl_table, w->j_type);
278 }
279 } else {
280 int cbp_index;
281 int ret;
282 645 w->j_type = 0;
283
284 645 ret = parse_mb_skip(w);
285
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 645 times.
645 if (ret < 0)
286 return ret;
287 645 cbp_index = decode012(&s->gb);
288 645 w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
289
290
1/2
✓ Branch 0 taken 645 times.
✗ Branch 1 not taken.
645 if (w->mspel_bit)
291 645 s->mspel = get_bits1(&s->gb);
292 else
293 s->mspel = 0; // FIXME check
294
295
1/2
✓ Branch 0 taken 645 times.
✗ Branch 1 not taken.
645 if (w->abt_flag) {
296 645 w->per_mb_abt = get_bits1(&s->gb) ^ 1;
297
2/2
✓ Branch 0 taken 187 times.
✓ Branch 1 taken 458 times.
645 if (!w->per_mb_abt)
298 187 w->abt_type = decode012(&s->gb);
299 }
300
301
1/2
✓ Branch 0 taken 645 times.
✗ Branch 1 not taken.
645 if (w->per_mb_rl_bit)
302 645 s->per_mb_rl_table = get_bits1(&s->gb);
303 else
304 s->per_mb_rl_table = 0;
305
306
2/2
✓ Branch 0 taken 617 times.
✓ Branch 1 taken 28 times.
645 if (!s->per_mb_rl_table) {
307 617 s->rl_table_index = decode012(&s->gb);
308 617 s->rl_chroma_table_index = s->rl_table_index;
309 }
310
311
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 645 times.
645 if (get_bits_left(&s->gb) < 2)
312 return AVERROR_INVALIDDATA;
313
314 645 s->dc_table_index = get_bits1(&s->gb);
315 645 s->mv_table_index = get_bits1(&s->gb);
316
317 645 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
318 645 s->no_rounding ^= 1;
319
320
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 645 times.
645 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
321 av_log(s->avctx, AV_LOG_DEBUG,
322 "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d "
323 "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n",
324 s->rl_table_index, s->rl_chroma_table_index,
325 s->dc_table_index, s->mv_table_index,
326 s->per_mb_rl_table, s->qscale, s->mspel,
327 w->per_mb_abt, w->abt_type, w->cbp_table_index,
328 s->inter_intra_pred);
329 }
330 }
331 674 s->esc3_level_length = 0;
332 674 s->esc3_run_length = 0;
333 674 s->picture_number++; // FIXME ?
334
335
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 671 times.
674 if (w->j_type) {
336 3 ff_intrax8_decode_picture(&w->x8, &s->current_picture,
337 &s->gb, &s->mb_x, &s->mb_y,
338 3 2 * s->qscale, (s->qscale - 1) | 1,
339 s->loop_filter, s->low_delay);
340
341 3 ff_er_add_slice(&w->s.er, 0, 0,
342 3 (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,
343 ER_MB_END);
344 3 return 1;
345 }
346
347 671 return 0;
348 }
349
350 118424 static inline void wmv2_decode_motion(WMV2DecContext *w, int *mx_ptr, int *my_ptr)
351 {
352 118424 MpegEncContext *const s = &w->s;
353
354 118424 ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr);
355
356
4/4
✓ Branch 0 taken 50949 times.
✓ Branch 1 taken 67475 times.
✓ Branch 2 taken 19528 times.
✓ Branch 3 taken 31421 times.
118424 if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel)
357 19528 w->common.hshift = get_bits1(&s->gb);
358 else
359 98896 w->common.hshift = 0;
360 118424 }
361
362 118424 static int16_t *wmv2_pred_motion(WMV2DecContext *w, int *px, int *py)
363 {
364 118424 MpegEncContext *const s = &w->s;
365 int xy, wrap, diff, type;
366 int16_t *A, *B, *C, *mot_val;
367
368 118424 wrap = s->b8_stride;
369 118424 xy = s->block_index[0];
370
371 118424 mot_val = s->current_picture.motion_val[0][xy];
372
373 118424 A = s->current_picture.motion_val[0][xy - 1];
374 118424 B = s->current_picture.motion_val[0][xy - wrap];
375 118424 C = s->current_picture.motion_val[0][xy + 2 - wrap];
376
377
8/8
✓ Branch 0 taken 113312 times.
✓ Branch 1 taken 5112 times.
✓ Branch 2 taken 109268 times.
✓ Branch 3 taken 4044 times.
✓ Branch 4 taken 68720 times.
✓ Branch 5 taken 40548 times.
✓ Branch 6 taken 22431 times.
✓ Branch 7 taken 46289 times.
118424 if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
378 22431 diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
379 else
380 95993 diff = 0;
381
382
2/2
✓ Branch 0 taken 3203 times.
✓ Branch 1 taken 115221 times.
118424 if (diff >= 8)
383 3203 type = get_bits1(&s->gb);
384 else
385 115221 type = 2;
386
387
2/2
✓ Branch 0 taken 1698 times.
✓ Branch 1 taken 116726 times.
118424 if (type == 0) {
388 1698 *px = A[0];
389 1698 *py = A[1];
390
2/2
✓ Branch 0 taken 1505 times.
✓ Branch 1 taken 115221 times.
116726 } else if (type == 1) {
391 1505 *px = B[0];
392 1505 *py = B[1];
393 } else {
394 /* special case for first (slice) line */
395
2/2
✓ Branch 0 taken 4281 times.
✓ Branch 1 taken 110940 times.
115221 if (s->first_slice_line) {
396 4281 *px = A[0];
397 4281 *py = A[1];
398 } else {
399 110940 *px = mid_pred(A[0], B[0], C[0]);
400 110940 *py = mid_pred(A[1], B[1], C[1]);
401 }
402 }
403
404 118424 return mot_val;
405 }
406
407 710544 static inline int wmv2_decode_inter_block(WMV2DecContext *w, int16_t *block,
408 int n, int cbp)
409 {
410 710544 MpegEncContext *const s = &w->s;
411 static const int sub_cbp_table[3] = { 2, 3, 1 };
412 int sub_cbp, ret;
413
414
2/2
✓ Branch 0 taken 529955 times.
✓ Branch 1 taken 180589 times.
710544 if (!cbp) {
415 529955 s->block_last_index[n] = -1;
416 529955 return 0;
417 }
418
419
2/2
✓ Branch 0 taken 20828 times.
✓ Branch 1 taken 159761 times.
180589 if (w->per_block_abt)
420 20828 w->abt_type = decode012(&s->gb);
421 180589 w->abt_type_table[n] = w->abt_type;
422
423
2/2
✓ Branch 0 taken 31447 times.
✓ Branch 1 taken 149142 times.
180589 if (w->abt_type) {
424 // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated;
425 31447 const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable;
426 // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
427
428 31447 sub_cbp = sub_cbp_table[decode012(&s->gb)];
429
430
2/2
✓ Branch 0 taken 18950 times.
✓ Branch 1 taken 12497 times.
31447 if (sub_cbp & 1)
431
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 18950 times.
18950 if ((ret = ff_msmpeg4_decode_block(s, block, n, 1, scantable)) < 0)
432 return ret;
433
434
2/2
✓ Branch 0 taken 19090 times.
✓ Branch 1 taken 12357 times.
31447 if (sub_cbp & 2)
435
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 19090 times.
19090 if ((ret = ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable)) < 0)
436 return ret;
437
438 31447 s->block_last_index[n] = 63;
439
440 31447 return 0;
441 } else {
442 149142 return ff_msmpeg4_decode_block(s, block, n, 1,
443 149142 s->inter_scantable.permutated);
444 }
445 }
446
447 201150 int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64])
448 {
449 /* The following is only allowed because this encoder
450 * does not use slice threading. */
451 201150 WMV2DecContext *const w = (WMV2DecContext *) s;
452 int cbp, code, i, ret;
453 uint8_t *coded_val;
454
455
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 201150 times.
201150 if (w->j_type)
456 return 0;
457
458
2/2
✓ Branch 0 taken 193365 times.
✓ Branch 1 taken 7785 times.
201150 if (s->pict_type == AV_PICTURE_TYPE_P) {
459
2/2
✓ Branch 0 taken 71725 times.
✓ Branch 1 taken 121640 times.
193365 if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) {
460 /* skip mb */
461 71725 s->mb_intra = 0;
462
2/2
✓ Branch 0 taken 430350 times.
✓ Branch 1 taken 71725 times.
502075 for (i = 0; i < 6; i++)
463 430350 s->block_last_index[i] = -1;
464 71725 s->mv_dir = MV_DIR_FORWARD;
465 71725 s->mv_type = MV_TYPE_16X16;
466 71725 s->mv[0][0][0] = 0;
467 71725 s->mv[0][0][1] = 0;
468 71725 s->mb_skipped = 1;
469 71725 w->common.hshift = 0;
470 71725 return 0;
471 }
472
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 121640 times.
121640 if (get_bits_left(&s->gb) <= 0)
473 return AVERROR_INVALIDDATA;
474
475 121640 code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table,
476 MB_NON_INTRA_VLC_BITS, 3);
477 121640 s->mb_intra = (~code & 0x40) >> 6;
478
479 121640 cbp = code & 0x3f;
480 } else {
481 7785 s->mb_intra = 1;
482
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 7785 times.
7785 if (get_bits_left(&s->gb) <= 0)
483 return AVERROR_INVALIDDATA;
484 7785 code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
485 /* predict coded block pattern */
486 7785 cbp = 0;
487
2/2
✓ Branch 0 taken 46710 times.
✓ Branch 1 taken 7785 times.
54495 for (i = 0; i < 6; i++) {
488 46710 int val = ((code >> (5 - i)) & 1);
489
2/2
✓ Branch 0 taken 31140 times.
✓ Branch 1 taken 15570 times.
46710 if (i < 4) {
490 31140 int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val);
491 31140 val = val ^ pred;
492 31140 *coded_val = val;
493 }
494 46710 cbp |= val << (5 - i);
495 }
496 }
497
498
2/2
✓ Branch 0 taken 118424 times.
✓ Branch 1 taken 11001 times.
129425 if (!s->mb_intra) {
499 int mx, my;
500 118424 wmv2_pred_motion(w, &mx, &my);
501
502
2/2
✓ Branch 0 taken 76773 times.
✓ Branch 1 taken 41651 times.
118424 if (cbp) {
503 76773 s->bdsp.clear_blocks(s->block[0]);
504
2/2
✓ Branch 0 taken 1656 times.
✓ Branch 1 taken 75117 times.
76773 if (s->per_mb_rl_table) {
505 1656 s->rl_table_index = decode012(&s->gb);
506 1656 s->rl_chroma_table_index = s->rl_table_index;
507 }
508
509
3/4
✓ Branch 0 taken 76773 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 37493 times.
✓ Branch 3 taken 39280 times.
76773 if (w->abt_flag && w->per_mb_abt) {
510 37493 w->per_block_abt = get_bits1(&s->gb);
511
2/2
✓ Branch 0 taken 30618 times.
✓ Branch 1 taken 6875 times.
37493 if (!w->per_block_abt)
512 30618 w->abt_type = decode012(&s->gb);
513 } else
514 39280 w->per_block_abt = 0;
515 }
516
517 118424 wmv2_decode_motion(w, &mx, &my);
518
519 118424 s->mv_dir = MV_DIR_FORWARD;
520 118424 s->mv_type = MV_TYPE_16X16;
521 118424 s->mv[0][0][0] = mx;
522 118424 s->mv[0][0][1] = my;
523
524
2/2
✓ Branch 0 taken 710544 times.
✓ Branch 1 taken 118424 times.
828968 for (i = 0; i < 6; i++) {
525
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 710544 times.
710544 if ((ret = wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1)) < 0) {
526 av_log(s->avctx, AV_LOG_ERROR,
527 "\nerror while decoding inter block: %d x %d (%d)\n",
528 s->mb_x, s->mb_y, i);
529 return ret;
530 }
531 }
532 } else {
533 11001 if (s->pict_type == AV_PICTURE_TYPE_P)
534 ff_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp);
535 ff_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y,
536 ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0),
537 show_bits(&s->gb, 24));
538 11001 s->ac_pred = get_bits1(&s->gb);
539
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 11001 times.
11001 if (s->inter_intra_pred) {
540 s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table,
541 INTER_INTRA_VLC_BITS, 1);
542 ff_dlog(s->avctx, "%d%d %d %d/",
543 s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
544 }
545
4/4
✓ Branch 0 taken 261 times.
✓ Branch 1 taken 10740 times.
✓ Branch 2 taken 128 times.
✓ Branch 3 taken 133 times.
11001 if (s->per_mb_rl_table && cbp) {
546 128 s->rl_table_index = decode012(&s->gb);
547 128 s->rl_chroma_table_index = s->rl_table_index;
548 }
549
550 11001 s->bdsp.clear_blocks(s->block[0]);
551
2/2
✓ Branch 0 taken 66006 times.
✓ Branch 1 taken 11001 times.
77007 for (i = 0; i < 6; i++) {
552
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 66006 times.
66006 if ((ret = ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL)) < 0) {
553 av_log(s->avctx, AV_LOG_ERROR,
554 "\nerror while decoding intra block: %d x %d (%d)\n",
555 s->mb_x, s->mb_y, i);
556 return ret;
557 }
558 }
559 }
560
561 129425 return 0;
562 }
563
564 12 static av_cold int wmv2_decode_init(AVCodecContext *avctx)
565 {
566 12 WMV2DecContext *const w = avctx->priv_data;
567 12 MpegEncContext *const s = &w->s;
568 int ret;
569
570 12 s->private_ctx = &w->common;
571
572
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 12 times.
12 if ((ret = ff_msmpeg4_decode_init(avctx)) < 0)
573 return ret;
574
575 12 ff_wmv2_common_init(s);
576 12 ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[0],
577 ff_wmv2_scantableA);
578 12 ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[1],
579 ff_wmv2_scantableB);
580
581 12 return ff_intrax8_common_init(avctx, &w->x8,
582 12 w->s.block, w->s.block_last_index,
583 w->s.mb_width, w->s.mb_height);
584 }
585
586 12 static av_cold int wmv2_decode_end(AVCodecContext *avctx)
587 {
588 12 WMV2DecContext *const w = avctx->priv_data;
589
590 12 ff_intrax8_common_end(&w->x8);
591 12 return ff_h263_decode_end(avctx);
592 }
593
594 const FFCodec ff_wmv2_decoder = {
595 .p.name = "wmv2",
596 .p.long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
597 .p.type = AVMEDIA_TYPE_VIDEO,
598 .p.id = AV_CODEC_ID_WMV2,
599 .priv_data_size = sizeof(WMV2DecContext),
600 .init = wmv2_decode_init,
601 .close = wmv2_decode_end,
602 FF_CODEC_DECODE_CB(ff_h263_decode_frame),
603 .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
604 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
605 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
606 AV_PIX_FMT_NONE },
607 };
608