FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg4videodec.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 1015 2145 47.3%
Branches: 610 1449 42.1%
Line Branch Exec Source
1 /*
2 * MPEG-4 decoder
3 * Copyright (c) 2000,2001 Fabrice Bellard
4 * Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #define UNCHECKED_BITSTREAM_READER 1
24
25 #include "libavutil/internal.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/thread.h"
29 #include "error_resilience.h"
30 #include "hwconfig.h"
31 #include "idctdsp.h"
32 #include "internal.h"
33 #include "mpegutils.h"
34 #include "mpegvideo.h"
35 #include "mpegvideodata.h"
36 #include "mpeg4video.h"
37 #include "h263.h"
38 #include "profiles.h"
39 #include "thread.h"
40 #include "xvididct.h"
41 #include "unary.h"
42
43 /* The defines below define the number of bits that are read at once for
44 * reading vlc values. Changing these may improve speed and data cache needs
45 * be aware though that decreasing them may need the number of stages that is
46 * passed to get_vlc* to be increased. */
47 #define SPRITE_TRAJ_VLC_BITS 6
48 #define DC_VLC_BITS 9
49 #define MB_TYPE_B_VLC_BITS 4
50 #define STUDIO_INTRA_BITS 9
51
52 static VLC dc_lum, dc_chrom;
53 static VLC sprite_trajectory;
54 static VLC mb_type_b_vlc;
55 static VLC studio_intra_tab[12];
56 static VLC studio_luma_dc;
57 static VLC studio_chroma_dc;
58
59 static const int mb_type_b_map[4] = {
60 MB_TYPE_DIRECT2 | MB_TYPE_L0L1,
61 MB_TYPE_L0L1 | MB_TYPE_16x16,
62 MB_TYPE_L1 | MB_TYPE_16x16,
63 MB_TYPE_L0 | MB_TYPE_16x16,
64 };
65
66 /**
67 * Predict the ac.
68 * @param n block index (0-3 are luma, 4-5 are chroma)
69 * @param dir the ac prediction direction
70 */
71 1299666 void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir)
72 {
73 int i;
74 int16_t *ac_val, *ac_val1;
75 1299666 int8_t *const qscale_table = s->current_picture.qscale_table;
76
77 /* find prediction */
78 1299666 ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16;
79 1299666 ac_val1 = ac_val;
80
2/2
✓ Branch 0 taken 30084 times.
✓ Branch 1 taken 1269582 times.
 1299666 if (s->ac_pred) {
81
2/2
✓ Branch 0 taken 20713 times.
✓ Branch 1 taken 9371 times.
 30084 if (dir == 0) {
82 20713 const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
83 /* left prediction */
84 20713 ac_val -= 16;
85
86
3/6
✓ Branch 0 taken 20233 times.
✓ Branch 1 taken 480 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 20233 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 20713 if (s->mb_x == 0 || s->qscale == qscale_table[xy] ||
87 ✗ n == 1 || n == 3) {
88 /* same qscale */
89
2/2
✓ Branch 0 taken 144991 times.
✓ Branch 1 taken 20713 times.
 165704 for (i = 1; i < 8; i++)
90 144991 block[s->idsp.idct_permutation[i << 3]] += ac_val[i];
91 } else {
92 /* different qscale, we must rescale */
93 ✗ for (i = 1; i < 8; i++)
94 ✗ block[s->idsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
95 }
96 } else {
97 9371 const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
98 /* top prediction */
99 9371 ac_val -= 16 * s->block_wrap[n];
100
101
6/6
✓ Branch 0 taken 9160 times.
✓ Branch 1 taken 211 times.
✓ Branch 2 taken 3 times.
✓ Branch 3 taken 9157 times.
✓ Branch 4 taken 2 times.
✓ Branch 5 taken 1 times.
 9371 if (s->mb_y == 0 || s->qscale == qscale_table[xy] ||
102
1/2
✓ Branch 0 taken 2 times.
✗ Branch 1 not taken.
 2 n == 2 || n == 3) {
103 /* same qscale */
104
2/2
✓ Branch 0 taken 65597 times.
✓ Branch 1 taken 9371 times.
 74968 for (i = 1; i < 8; i++)
105 65597 block[s->idsp.idct_permutation[i]] += ac_val[i + 8];
106 } else {
107 /* different qscale, we must rescale */
108 ✗ for (i = 1; i < 8; i++)
109 ✗ block[s->idsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
110 }
111 }
112 }
113 /* left copy */
114
2/2
✓ Branch 0 taken 9097662 times.
✓ Branch 1 taken 1299666 times.
 10397328 for (i = 1; i < 8; i++)
115 9097662 ac_val1[i] = block[s->idsp.idct_permutation[i << 3]];
116
117 /* top copy */
118
2/2
✓ Branch 0 taken 9097662 times.
✓ Branch 1 taken 1299666 times.
 10397328 for (i = 1; i < 8; i++)
119 9097662 ac_val1[8 + i] = block[s->idsp.idct_permutation[i]];
120 1299666 }
121
122 /**
123 * check if the next stuff is a resync marker or the end.
124 * @return 0 if not
125 */
126 1427120 static inline int mpeg4_is_resync(Mpeg4DecContext *ctx)
127 {
128 1427120 MpegEncContext *s = &ctx->m;
129 1427120 int bits_count = get_bits_count(&s->gb);
130 1427120 int v = show_bits(&s->gb, 16);
131
132
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 1427120 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 1427120 if (s->workaround_bugs & FF_BUG_NO_PADDING && !ctx->resync_marker)
133 ✗ return 0;
134
135
2/2
✓ Branch 0 taken 3299 times.
✓ Branch 1 taken 1423821 times.
 1427120 while (v <= 0xFF) {
136
2/2
✓ Branch 0 taken 2300 times.
✓ Branch 1 taken 999 times.
 3299 if (s->pict_type == AV_PICTURE_TYPE_B ||
137
3/4
✓ Branch 0 taken 176 times.
✓ Branch 1 taken 2124 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 176 times.
 2300 (v >> (8 - s->pict_type) != 1) || s->partitioned_frame)
138 break;
139 ✗ skip_bits(&s->gb, 8 + s->pict_type);
140 ✗ bits_count += 8 + s->pict_type;
141 ✗ v = show_bits(&s->gb, 16);
142 }
143
144
2/2
✓ Branch 0 taken 11669 times.
✓ Branch 1 taken 1415451 times.
 1427120 if (bits_count + 8 >= s->gb.size_in_bits) {
145 11669 v >>= 8;
146 11669 v |= 0x7F >> (7 - (bits_count & 7));
147
148
2/2
✓ Branch 0 taken 11352 times.
✓ Branch 1 taken 317 times.
 11669 if (v == 0x7F)
149 11352 return s->mb_num;
150 } else {
151
2/2
✓ Branch 0 taken 4098 times.
✓ Branch 1 taken 1411353 times.
 1415451 if (v == ff_mpeg4_resync_prefix[bits_count & 7]) {
152 int len, mb_num;
153 4098 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
154 4098 GetBitContext gb = s->gb;
155
156 4098 skip_bits(&s->gb, 1);
157 4098 align_get_bits(&s->gb);
158
159
1/2
✓ Branch 0 taken 72133 times.
✗ Branch 1 not taken.
 72133 for (len = 0; len < 32; len++)
160
2/2
✓ Branch 1 taken 4098 times.
✓ Branch 2 taken 68035 times.
 72133 if (get_bits1(&s->gb))
161 4098 break;
162
163 4098 mb_num = get_bits(&s->gb, mb_num_bits);
164
3/6
✓ Branch 0 taken 4098 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 4098 times.
✗ Branch 3 not taken.
✗ Branch 5 not taken.
✓ Branch 6 taken 4098 times.
 4098 if (!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits)
165 ✗ mb_num= -1;
166
167 4098 s->gb = gb;
168
169
2/2
✓ Branch 1 taken 4096 times.
✓ Branch 2 taken 2 times.
 4098 if (len >= ff_mpeg4_get_video_packet_prefix_length(s))
170 4096 return mb_num;
171 }
172 }
173 1411672 return 0;
174 }
175
176 ✗ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *gb)
177 {
178 ✗ MpegEncContext *s = &ctx->m;
179 ✗ int a = 2 << s->sprite_warping_accuracy;
180 ✗ int rho = 3 - s->sprite_warping_accuracy;
181 ✗ int r = 16 / a;
182 ✗ int alpha = 1;
183 ✗ int beta = 0;
184 ✗ int w = s->width;
185 ✗ int h = s->height;
186 int min_ab, i, w2, h2, w3, h3;
187 int sprite_ref[4][2];
188 int virtual_ref[2][2];
189 int64_t sprite_offset[2][2];
190 int64_t sprite_delta[2][2];
191
192 // only true for rectangle shapes
193 ✗ const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 },
194 ✗ { 0, s->height }, { s->width, s->height } };
195 ✗ int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } };
196
197 ✗ if (w <= 0 || h <= 0)
198 ✗ return AVERROR_INVALIDDATA;
199
200 ✗ for (i = 0; i < ctx->num_sprite_warping_points; i++) {
201 int length;
202 ✗ int x = 0, y = 0;
203
204 ✗ length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 2);
205 ✗ if (length > 0)
206 ✗ x = get_xbits(gb, length);
207
208 ✗ if (!(ctx->divx_version == 500 && ctx->divx_build == 413))
209 ✗ check_marker(s->avctx, gb, "before sprite_trajectory");
210
211 ✗ length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 2);
212 ✗ if (length > 0)
213 ✗ y = get_xbits(gb, length);
214
215 ✗ check_marker(s->avctx, gb, "after sprite_trajectory");
216 ✗ ctx->sprite_traj[i][0] = d[i][0] = x;
217 ✗ ctx->sprite_traj[i][1] = d[i][1] = y;
218 }
219 ✗ for (; i < 4; i++)
220 ✗ ctx->sprite_traj[i][0] = ctx->sprite_traj[i][1] = 0;
221
222 ✗ while ((1 << alpha) < w)
223 ✗ alpha++;
224 ✗ while ((1 << beta) < h)
225 ✗ beta++; /* typo in the MPEG-4 std for the definition of w' and h' */
226 ✗ w2 = 1 << alpha;
227 ✗ h2 = 1 << beta;
228
229 // Note, the 4th point isn't used for GMC
230 ✗ if (ctx->divx_version == 500 && ctx->divx_build == 413) {
231 ✗ sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0];
232 ✗ sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1];
233 ✗ sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0];
234 ✗ sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1];
235 ✗ sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0];
236 ✗ sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1];
237 } else {
238 ✗ sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]);
239 ✗ sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]);
240 ✗ sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]);
241 ✗ sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]);
242 ✗ sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]);
243 ✗ sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]);
244 }
245 /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
246 * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
247
248 /* This is mostly identical to the MPEG-4 std (and is totally unreadable
249 * because of that...). Perhaps it should be reordered to be more readable.
250 * The idea behind this virtual_ref mess is to be able to use shifts later
251 * per pixel instead of divides so the distance between points is converted
252 * from w&h based to w2&h2 based which are of the 2^x form. */
253 ✗ virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) +
254 ✗ ROUNDED_DIV(((w - w2) *
255 (r * sprite_ref[0][0] - 16LL * vop_ref[0][0]) +
256 w2 * (r * sprite_ref[1][0] - 16LL * vop_ref[1][0])), w);
257 ✗ virtual_ref[0][1] = 16 * vop_ref[0][1] +
258 ✗ ROUNDED_DIV(((w - w2) *
259 (r * sprite_ref[0][1] - 16LL * vop_ref[0][1]) +
260 w2 * (r * sprite_ref[1][1] - 16LL * vop_ref[1][1])), w);
261 ✗ virtual_ref[1][0] = 16 * vop_ref[0][0] +
262 ✗ ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16LL * vop_ref[0][0]) +
263 h2 * (r * sprite_ref[2][0] - 16LL * vop_ref[2][0])), h);
264 ✗ virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) +
265 ✗ ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16LL * vop_ref[0][1]) +
266 h2 * (r * sprite_ref[2][1] - 16LL * vop_ref[2][1])), h);
267
268 ✗ switch (ctx->num_sprite_warping_points) {
269 ✗ case 0:
270 ✗ sprite_offset[0][0] =
271 ✗ sprite_offset[0][1] =
272 ✗ sprite_offset[1][0] =
273 ✗ sprite_offset[1][1] = 0;
274 ✗ sprite_delta[0][0] = a;
275 ✗ sprite_delta[0][1] =
276 ✗ sprite_delta[1][0] = 0;
277 ✗ sprite_delta[1][1] = a;
278 ✗ ctx->sprite_shift[0] =
279 ✗ ctx->sprite_shift[1] = 0;
280 ✗ break;
281 ✗ case 1: // GMC only
282 ✗ sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0];
283 ✗ sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1];
284 ✗ sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) -
285 ✗ a * (vop_ref[0][0] / 2);
286 ✗ sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) -
287 ✗ a * (vop_ref[0][1] / 2);
288 ✗ sprite_delta[0][0] = a;
289 ✗ sprite_delta[0][1] =
290 ✗ sprite_delta[1][0] = 0;
291 ✗ sprite_delta[1][1] = a;
292 ✗ ctx->sprite_shift[0] =
293 ✗ ctx->sprite_shift[1] = 0;
294 ✗ break;
295 ✗ case 2:
296 ✗ sprite_offset[0][0] = ((int64_t) sprite_ref[0][0] * (1 << alpha + rho)) +
297 ✗ ((int64_t) -r * sprite_ref[0][0] + virtual_ref[0][0]) *
298 ✗ ((int64_t) -vop_ref[0][0]) +
299 ✗ ((int64_t) r * sprite_ref[0][1] - virtual_ref[0][1]) *
300 ✗ ((int64_t) -vop_ref[0][1]) + (1 << (alpha + rho - 1));
301 ✗ sprite_offset[0][1] = ((int64_t) sprite_ref[0][1] * (1 << alpha + rho)) +
302 ✗ ((int64_t) -r * sprite_ref[0][1] + virtual_ref[0][1]) *
303 ✗ ((int64_t) -vop_ref[0][0]) +
304 ✗ ((int64_t) -r * sprite_ref[0][0] + virtual_ref[0][0]) *
305 ✗ ((int64_t) -vop_ref[0][1]) + (1 << (alpha + rho - 1));
306 ✗ sprite_offset[1][0] = (((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) *
307 ✗ ((int64_t)-2 * vop_ref[0][0] + 1) +
308 ✗ ((int64_t) r * sprite_ref[0][1] - virtual_ref[0][1]) *
309 ✗ ((int64_t)-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
310 ✗ (int64_t) sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1)));
311 ✗ sprite_offset[1][1] = (((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) *
312 ✗ ((int64_t)-2 * vop_ref[0][0] + 1) +
313 ✗ ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) *
314 ✗ ((int64_t)-2 * vop_ref[0][1] + 1) + 2 * w2 * r *
315 ✗ (int64_t) sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1)));
316 ✗ sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
317 ✗ sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]);
318 ✗ sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]);
319 ✗ sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]);
320
321 ✗ ctx->sprite_shift[0] = alpha + rho;
322 ✗ ctx->sprite_shift[1] = alpha + rho + 2;
323 ✗ break;
324 ✗ case 3:
325 ✗ min_ab = FFMIN(alpha, beta);
326 ✗ w3 = w2 >> min_ab;
327 ✗ h3 = h2 >> min_ab;
328 ✗ sprite_offset[0][0] = ((int64_t)sprite_ref[0][0] * (1 << (alpha + beta + rho - min_ab))) +
329 ✗ ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3 * (-vop_ref[0][0]) +
330 ✗ ((int64_t)-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3 * (-vop_ref[0][1]) +
331 ✗ ((int64_t)1 << (alpha + beta + rho - min_ab - 1));
332 ✗ sprite_offset[0][1] = ((int64_t)sprite_ref[0][1] * (1 << (alpha + beta + rho - min_ab))) +
333 ✗ ((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3 * (-vop_ref[0][0]) +
334 ✗ ((int64_t)-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3 * (-vop_ref[0][1]) +
335 ✗ ((int64_t)1 << (alpha + beta + rho - min_ab - 1));
336 ✗ sprite_offset[1][0] = ((int64_t)-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3 * (-2 * vop_ref[0][0] + 1) +
337 ✗ ((int64_t)-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3 * (-2 * vop_ref[0][1] + 1) +
338 ✗ (int64_t)2 * w2 * h3 * r * sprite_ref[0][0] - 16 * w2 * h3 +
339 ✗ ((int64_t)1 << (alpha + beta + rho - min_ab + 1));
340 ✗ sprite_offset[1][1] = ((int64_t)-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3 * (-2 * vop_ref[0][0] + 1) +
341 ✗ ((int64_t)-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3 * (-2 * vop_ref[0][1] + 1) +
342 ✗ (int64_t)2 * w2 * h3 * r * sprite_ref[0][1] - 16 * w2 * h3 +
343 ✗ ((int64_t)1 << (alpha + beta + rho - min_ab + 1));
344 ✗ sprite_delta[0][0] = (-r * (int64_t)sprite_ref[0][0] + virtual_ref[0][0]) * h3;
345 ✗ sprite_delta[0][1] = (-r * (int64_t)sprite_ref[0][0] + virtual_ref[1][0]) * w3;
346 ✗ sprite_delta[1][0] = (-r * (int64_t)sprite_ref[0][1] + virtual_ref[0][1]) * h3;
347 ✗ sprite_delta[1][1] = (-r * (int64_t)sprite_ref[0][1] + virtual_ref[1][1]) * w3;
348
349 ✗ ctx->sprite_shift[0] = alpha + beta + rho - min_ab;
350 ✗ ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2;
351 ✗ break;
352 }
353 /* try to simplify the situation */
354 ✗ if (sprite_delta[0][0] == a << ctx->sprite_shift[0] &&
355 ✗ sprite_delta[0][1] == 0 &&
356 ✗ sprite_delta[1][0] == 0 &&
357 ✗ sprite_delta[1][1] == a << ctx->sprite_shift[0]) {
358 ✗ sprite_offset[0][0] >>= ctx->sprite_shift[0];
359 ✗ sprite_offset[0][1] >>= ctx->sprite_shift[0];
360 ✗ sprite_offset[1][0] >>= ctx->sprite_shift[1];
361 ✗ sprite_offset[1][1] >>= ctx->sprite_shift[1];
362 ✗ sprite_delta[0][0] = a;
363 ✗ sprite_delta[0][1] = 0;
364 ✗ sprite_delta[1][0] = 0;
365 ✗ sprite_delta[1][1] = a;
366 ✗ ctx->sprite_shift[0] = 0;
367 ✗ ctx->sprite_shift[1] = 0;
368 ✗ s->real_sprite_warping_points = 1;
369 } else {
370 ✗ int shift_y = 16 - ctx->sprite_shift[0];
371 ✗ int shift_c = 16 - ctx->sprite_shift[1];
372
373 ✗ for (i = 0; i < 2; i++) {
374 ✗ if (shift_c < 0 || shift_y < 0 ||
375 ✗ FFABS( sprite_offset[0][i]) >= INT_MAX >> shift_y ||
376 ✗ FFABS( sprite_offset[1][i]) >= INT_MAX >> shift_c ||
377 ✗ FFABS( sprite_delta[0][i]) >= INT_MAX >> shift_y ||
378 ✗ FFABS( sprite_delta[1][i]) >= INT_MAX >> shift_y
379 ) {
380 ✗ avpriv_request_sample(s->avctx, "Too large sprite shift, delta or offset");
381 ✗ goto overflow;
382 }
383 }
384
385 ✗ for (i = 0; i < 2; i++) {
386 ✗ sprite_offset[0][i] *= 1 << shift_y;
387 ✗ sprite_offset[1][i] *= 1 << shift_c;
388 ✗ sprite_delta[0][i] *= 1 << shift_y;
389 ✗ sprite_delta[1][i] *= 1 << shift_y;
390 ✗ ctx->sprite_shift[i] = 16;
391
392 }
393 ✗ for (i = 0; i < 2; i++) {
394 ✗ int64_t sd[2] = {
395 ✗ sprite_delta[i][0] - a * (1LL<<16),
396 ✗ sprite_delta[i][1] - a * (1LL<<16)
397 };
398
399 ✗ if (llabs(sprite_offset[0][i] + sprite_delta[i][0] * (w+16LL)) >= INT_MAX ||
400 ✗ llabs(sprite_offset[0][i] + sprite_delta[i][1] * (h+16LL)) >= INT_MAX ||
401 ✗ llabs(sprite_offset[0][i] + sprite_delta[i][0] * (w+16LL) + sprite_delta[i][1] * (h+16LL)) >= INT_MAX ||
402 ✗ llabs(sprite_delta[i][0] * (w+16LL)) >= INT_MAX ||
403 ✗ llabs(sprite_delta[i][1] * (h+16LL)) >= INT_MAX ||
404 ✗ llabs(sd[0]) >= INT_MAX ||
405 ✗ llabs(sd[1]) >= INT_MAX ||
406 ✗ llabs(sprite_offset[0][i] + sd[0] * (w+16LL)) >= INT_MAX ||
407 ✗ llabs(sprite_offset[0][i] + sd[1] * (h+16LL)) >= INT_MAX ||
408 ✗ llabs(sprite_offset[0][i] + sd[0] * (w+16LL) + sd[1] * (h+16LL)) >= INT_MAX
409 ) {
410 ✗ avpriv_request_sample(s->avctx, "Overflow on sprite points");
411 ✗ goto overflow;
412 }
413 }
414 ✗ s->real_sprite_warping_points = ctx->num_sprite_warping_points;
415 }
416
417 ✗ for (i = 0; i < 4; i++) {
418 ✗ s->sprite_offset[i&1][i>>1] = sprite_offset[i&1][i>>1];
419 ✗ s->sprite_delta [i&1][i>>1] = sprite_delta [i&1][i>>1];
420 }
421
422 ✗ return 0;
423 ✗ overflow:
424 ✗ memset(s->sprite_offset, 0, sizeof(s->sprite_offset));
425 ✗ memset(s->sprite_delta, 0, sizeof(s->sprite_delta));
426 ✗ return AVERROR_PATCHWELCOME;
427 }
428
429 ✗ static int decode_new_pred(Mpeg4DecContext *ctx, GetBitContext *gb) {
430 ✗ MpegEncContext *s = &ctx->m;
431 ✗ int len = FFMIN(ctx->time_increment_bits + 3, 15);
432
433 ✗ get_bits(gb, len);
434 ✗ if (get_bits1(gb))
435 ✗ get_bits(gb, len);
436 ✗ check_marker(s->avctx, gb, "after new_pred");
437
438 ✗ return 0;
439 }
440
441 /**
442 * Decode the next video packet.
443 * @return <0 if something went wrong
444 */
445 3867 int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx)
446 {
447 3867 MpegEncContext *s = &ctx->m;
448
449 3867 int mb_num_bits = av_log2(s->mb_num - 1) + 1;
450 3867 int header_extension = 0, mb_num, len;
451
452 /* is there enough space left for a video packet + header */
453
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3867 times.
 3867 if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20)
454 ✗ return AVERROR_INVALIDDATA;
455
456
1/2
✓ Branch 0 taken 68178 times.
✗ Branch 1 not taken.
 68178 for (len = 0; len < 32; len++)
457
2/2
✓ Branch 1 taken 3867 times.
✓ Branch 2 taken 64311 times.
 68178 if (get_bits1(&s->gb))
458 3867 break;
459
460
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3867 times.
 3867 if (len != ff_mpeg4_get_video_packet_prefix_length(s)) {
461 ✗ av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n");
462 ✗ return AVERROR_INVALIDDATA;
463 }
464
465
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3867 times.
 3867 if (ctx->shape != RECT_SHAPE) {
466 ✗ header_extension = get_bits1(&s->gb);
467 // FIXME more stuff here
468 }
469
470 3867 mb_num = get_bits(&s->gb, mb_num_bits);
471
2/4
✓ Branch 0 taken 3867 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 3867 times.
 3867 if (mb_num >= s->mb_num || !mb_num) {
472 ✗ av_log(s->avctx, AV_LOG_ERROR,
473 "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
474 ✗ return AVERROR_INVALIDDATA;
475 }
476
477 3867 s->mb_x = mb_num % s->mb_width;
478 3867 s->mb_y = mb_num / s->mb_width;
479
480
1/2
✓ Branch 0 taken 3867 times.
✗ Branch 1 not taken.
 3867 if (ctx->shape != BIN_ONLY_SHAPE) {
481 3867 int qscale = get_bits(&s->gb, s->quant_precision);
482
1/2
✓ Branch 0 taken 3867 times.
✗ Branch 1 not taken.
 3867 if (qscale)
483 3867 s->chroma_qscale = s->qscale = qscale;
484 }
485
486
1/2
✓ Branch 0 taken 3867 times.
✗ Branch 1 not taken.
 3867 if (ctx->shape == RECT_SHAPE)
487 3867 header_extension = get_bits1(&s->gb);
488
489
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3867 times.
 3867 if (header_extension) {
490 ✗ int time_incr = 0;
491
492 ✗ while (get_bits1(&s->gb) != 0)
493 ✗ time_incr++;
494
495 ✗ check_marker(s->avctx, &s->gb, "before time_increment in video packed header");
496 ✗ skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */
497 ✗ check_marker(s->avctx, &s->gb, "before vop_coding_type in video packed header");
498
499 ✗ skip_bits(&s->gb, 2); /* vop coding type */
500 // FIXME not rect stuff here
501
502 ✗ if (ctx->shape != BIN_ONLY_SHAPE) {
503 ✗ skip_bits(&s->gb, 3); /* intra dc vlc threshold */
504 // FIXME don't just ignore everything
505 ✗ if (s->pict_type == AV_PICTURE_TYPE_S &&
506 ✗ ctx->vol_sprite_usage == GMC_SPRITE) {
507 ✗ if (mpeg4_decode_sprite_trajectory(ctx, &s->gb) < 0)
508 ✗ return AVERROR_INVALIDDATA;
509 ✗ av_log(s->avctx, AV_LOG_ERROR, "untested\n");
510 }
511
512 // FIXME reduced res stuff here
513
514 ✗ if (s->pict_type != AV_PICTURE_TYPE_I) {
515 ✗ int f_code = get_bits(&s->gb, 3); /* fcode_for */
516 ✗ if (f_code == 0)
517 ✗ av_log(s->avctx, AV_LOG_ERROR,
518 "Error, video packet header damaged (f_code=0)\n");
519 }
520 ✗ if (s->pict_type == AV_PICTURE_TYPE_B) {
521 ✗ int b_code = get_bits(&s->gb, 3);
522 ✗ if (b_code == 0)
523 ✗ av_log(s->avctx, AV_LOG_ERROR,
524 "Error, video packet header damaged (b_code=0)\n");
525 }
526 }
527 }
528
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3867 times.
 3867 if (ctx->new_pred)
529 ✗ decode_new_pred(ctx, &s->gb);
530
531 3867 return 0;
532 }
533
534 ✗ static void reset_studio_dc_predictors(MpegEncContext *s)
535 {
536 /* Reset DC Predictors */
537 ✗ s->last_dc[0] =
538 ✗ s->last_dc[1] =
539 ✗ s->last_dc[2] = 1 << (s->avctx->bits_per_raw_sample + s->dct_precision + s->intra_dc_precision - 1);
540 }
541
542 /**
543 * Decode the next video packet.
544 * @return <0 if something went wrong
545 */
546 ✗ int ff_mpeg4_decode_studio_slice_header(Mpeg4DecContext *ctx)
547 {
548 ✗ MpegEncContext *s = &ctx->m;
549 ✗ GetBitContext *gb = &s->gb;
550 unsigned vlc_len;
551 uint16_t mb_num;
552
553 ✗ if (get_bits_left(gb) >= 32 && get_bits_long(gb, 32) == SLICE_STARTCODE) {
554 ✗ vlc_len = av_log2(s->mb_width * s->mb_height) + 1;
555 ✗ mb_num = get_bits(gb, vlc_len);
556
557 ✗ if (mb_num >= s->mb_num)
558 ✗ return AVERROR_INVALIDDATA;
559
560 ✗ s->mb_x = mb_num % s->mb_width;
561 ✗ s->mb_y = mb_num / s->mb_width;
562
563 ✗ if (ctx->shape != BIN_ONLY_SHAPE)
564 ✗ s->qscale = mpeg_get_qscale(s);
565
566 ✗ if (get_bits1(gb)) { /* slice_extension_flag */
567 ✗ skip_bits1(gb); /* intra_slice */
568 ✗ skip_bits1(gb); /* slice_VOP_id_enable */
569 ✗ skip_bits(gb, 6); /* slice_VOP_id */
570 ✗ while (get_bits1(gb)) /* extra_bit_slice */
571 ✗ skip_bits(gb, 8); /* extra_information_slice */
572 }
573
574 ✗ reset_studio_dc_predictors(s);
575 }
576 else {
577 ✗ return AVERROR_INVALIDDATA;
578 }
579
580 ✗ return 0;
581 }
582
583 /**
584 * Get the average motion vector for a GMC MB.
585 * @param n either 0 for the x component or 1 for y
586 * @return the average MV for a GMC MB
587 */
588 ✗ static inline int get_amv(Mpeg4DecContext *ctx, int n)
589 {
590 ✗ MpegEncContext *s = &ctx->m;
591 int x, y, mb_v, sum, dx, dy, shift;
592 ✗ int len = 1 << (s->f_code + 4);
593 ✗ const int a = s->sprite_warping_accuracy;
594
595 ✗ if (s->workaround_bugs & FF_BUG_AMV)
596 ✗ len >>= s->quarter_sample;
597
598 ✗ if (s->real_sprite_warping_points == 1) {
599 ✗ if (ctx->divx_version == 500 && ctx->divx_build == 413 && a >= s->quarter_sample)
600 ✗ sum = s->sprite_offset[0][n] / (1 << (a - s->quarter_sample));
601 else
602 ✗ sum = RSHIFT(s->sprite_offset[0][n] * (1 << s->quarter_sample), a);
603 } else {
604 ✗ dx = s->sprite_delta[n][0];
605 ✗ dy = s->sprite_delta[n][1];
606 ✗ shift = ctx->sprite_shift[0];
607 ✗ if (n)
608 ✗ dy -= 1 << (shift + a + 1);
609 else
610 ✗ dx -= 1 << (shift + a + 1);
611 ✗ mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16U + dy * s->mb_y * 16U;
612
613 ✗ sum = 0;
614 ✗ for (y = 0; y < 16; y++) {
615 int v;
616
617 ✗ v = mb_v + dy * y;
618 // FIXME optimize
619 ✗ for (x = 0; x < 16; x++) {
620 ✗ sum += v >> shift;
621 ✗ v += dx;
622 }
623 }
624 ✗ sum = RSHIFT(sum, a + 8 - s->quarter_sample);
625 }
626
627 ✗ if (sum < -len)
628 ✗ sum = -len;
629 ✗ else if (sum >= len)
630 ✗ sum = len - 1;
631
632 ✗ return sum;
633 }
634
635 /**
636 * Decode the dc value.
637 * @param n block index (0-3 are luma, 4-5 are chroma)
638 * @param dir_ptr the prediction direction will be stored here
639 * @return the quantized dc
640 */
641 1068954 static inline int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr)
642 {
643 int level, code;
644
645
2/2
✓ Branch 0 taken 712636 times.
✓ Branch 1 taken 356318 times.
 1068954 if (n < 4)
646 712636 code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
647 else
648 356318 code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
649
650
2/4
✓ Branch 0 taken 1068954 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 1068954 times.
 1068954 if (code < 0 || code > 9 /* && s->nbit < 9 */) {
651 ✗ av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
652 ✗ return AVERROR_INVALIDDATA;
653 }
654
655
2/2
✓ Branch 0 taken 156549 times.
✓ Branch 1 taken 912405 times.
 1068954 if (code == 0) {
656 156549 level = 0;
657 } else {
658 if (IS_3IV1) {
659 if (code == 1)
660 level = 2 * get_bits1(&s->gb) - 1;
661 else {
662 if (get_bits1(&s->gb))
663 level = get_bits(&s->gb, code - 1) + (1 << (code - 1));
664 else
665 level = -get_bits(&s->gb, code - 1) - (1 << (code - 1));
666 }
667 } else {
668 912405 level = get_xbits(&s->gb, code);
669 }
670
671
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 912405 times.
 912405 if (code > 8) {
672 ✗ if (get_bits1(&s->gb) == 0) { /* marker */
673 ✗ if (s->avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) {
674 ✗ av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
675 ✗ return AVERROR_INVALIDDATA;
676 }
677 }
678 }
679 }
680
681 1068954 return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0);
682 }
683
684 /**
685 * Decode first partition.
686 * @return number of MBs decoded or <0 if an error occurred
687 */
688 1728 static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx)
689 {
690 1728 MpegEncContext *s = &ctx->m;
691 1728 int mb_num = 0;
692 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
693
694 /* decode first partition */
695 1728 s->first_slice_line = 1;
696
2/2
✓ Branch 0 taken 7839 times.
✓ Branch 1 taken 472 times.
 8311 for (; s->mb_y < s->mb_height; s->mb_y++) {
697 7839 ff_init_block_index(s);
698
2/2
✓ Branch 0 taken 139320 times.
✓ Branch 1 taken 6583 times.
 145903 for (; s->mb_x < s->mb_width; s->mb_x++) {
699 139320 const int xy = s->mb_x + s->mb_y * s->mb_stride;
700 int cbpc;
701 139320 int dir = 0;
702
703 139320 mb_num++;
704 139320 ff_update_block_index(s);
705
4/4
✓ Branch 0 taken 7397 times.
✓ Branch 1 taken 131923 times.
✓ Branch 2 taken 1611 times.
✓ Branch 3 taken 5786 times.
 139320 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
706 1611 s->first_slice_line = 0;
707
708
2/2
✓ Branch 0 taken 17762 times.
✓ Branch 1 taken 121558 times.
 139320 if (s->pict_type == AV_PICTURE_TYPE_I) {
709 int i;
710
711 do {
712
2/2
✓ Branch 1 taken 439 times.
✓ Branch 2 taken 17323 times.
 17762 if (show_bits(&s->gb, 19) == DC_MARKER)
713 439 return mb_num - 1;
714
715 17323 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
716
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
 17323 if (cbpc < 0) {
717 ✗ av_log(s->avctx, AV_LOG_ERROR,
718 "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
719 ✗ return AVERROR_INVALIDDATA;
720 }
721
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
 17323 } while (cbpc == 8);
722
723 17323 s->cbp_table[xy] = cbpc & 3;
724 17323 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
725 17323 s->mb_intra = 1;
726
727
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
 17323 if (cbpc & 4)
728 ✗ ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
729
730 17323 s->current_picture.qscale_table[xy] = s->qscale;
731
732 17323 s->mbintra_table[xy] = 1;
733
2/2
✓ Branch 0 taken 103938 times.
✓ Branch 1 taken 17323 times.
 121261 for (i = 0; i < 6; i++) {
734 int dc_pred_dir;
735 103938 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
736
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 103938 times.
 103938 if (dc < 0) {
737 ✗ av_log(s->avctx, AV_LOG_ERROR,
738 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
739 ✗ return dc;
740 }
741 103938 dir <<= 1;
742
2/2
✓ Branch 0 taken 30118 times.
✓ Branch 1 taken 73820 times.
 103938 if (dc_pred_dir)
743 30118 dir |= 1;
744 }
745 17323 s->pred_dir_table[xy] = dir;
746 } else { /* P/S_TYPE */
747 int mx, my, pred_x, pred_y, bits;
748 121558 int16_t *const mot_val = s->current_picture.motion_val[0][s->block_index[0]];
749 121558 const int stride = s->b8_stride * 2;
750
751 121558 try_again:
752 121558 bits = show_bits(&s->gb, 17);
753
2/2
✓ Branch 0 taken 817 times.
✓ Branch 1 taken 120741 times.
 121558 if (bits == MOTION_MARKER)
754 817 return mb_num - 1;
755
756 120741 skip_bits1(&s->gb);
757
2/2
✓ Branch 0 taken 997 times.
✓ Branch 1 taken 119744 times.
 120741 if (bits & 0x10000) {
758 /* skip mb */
759
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 997 times.
 997 if (s->pict_type == AV_PICTURE_TYPE_S &&
760 ✗ ctx->vol_sprite_usage == GMC_SPRITE) {
761 ✗ s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
762 MB_TYPE_16x16 |
763 MB_TYPE_GMC |
764 MB_TYPE_L0;
765 ✗ mx = get_amv(ctx, 0);
766 ✗ my = get_amv(ctx, 1);
767 } else {
768 997 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
769 MB_TYPE_16x16 |
770 MB_TYPE_L0;
771 997 mx = my = 0;
772 }
773 997 mot_val[0] =
774 997 mot_val[2] =
775 997 mot_val[0 + stride] =
776 997 mot_val[2 + stride] = mx;
777 997 mot_val[1] =
778 997 mot_val[3] =
779 997 mot_val[1 + stride] =
780 997 mot_val[3 + stride] = my;
781
782
2/2
✓ Branch 0 taken 224 times.
✓ Branch 1 taken 773 times.
 997 if (s->mbintra_table[xy])
783 224 ff_clean_intra_table_entries(s);
784 997 continue;
785 }
786
787 119744 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
788
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 119744 times.
 119744 if (cbpc < 0) {
789 ✗ av_log(s->avctx, AV_LOG_ERROR,
790 "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
791 ✗ return AVERROR_INVALIDDATA;
792 }
793
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 119744 times.
 119744 if (cbpc == 20)
794 ✗ goto try_again;
795
796 119744 s->cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant
797
798 119744 s->mb_intra = ((cbpc & 4) != 0);
799
800
2/2
✓ Branch 0 taken 6287 times.
✓ Branch 1 taken 113457 times.
 119744 if (s->mb_intra) {
801 6287 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
802 6287 s->mbintra_table[xy] = 1;
803 6287 mot_val[0] =
804 6287 mot_val[2] =
805 6287 mot_val[0 + stride] =
806 6287 mot_val[2 + stride] = 0;
807 6287 mot_val[1] =
808 6287 mot_val[3] =
809 6287 mot_val[1 + stride] =
810 6287 mot_val[3 + stride] = 0;
811 } else {
812
2/2
✓ Branch 0 taken 19851 times.
✓ Branch 1 taken 93606 times.
 113457 if (s->mbintra_table[xy])
813 19851 ff_clean_intra_table_entries(s);
814
815
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 113457 times.
 113457 if (s->pict_type == AV_PICTURE_TYPE_S &&
816 ✗ ctx->vol_sprite_usage == GMC_SPRITE &&
817 ✗ (cbpc & 16) == 0)
818 ✗ s->mcsel = get_bits1(&s->gb);
819 else
820 113457 s->mcsel = 0;
821
822
2/2
✓ Branch 0 taken 81626 times.
✓ Branch 1 taken 31831 times.
 113457 if ((cbpc & 16) == 0) {
823 /* 16x16 motion prediction */
824
825 81626 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
826
1/2
✓ Branch 0 taken 81626 times.
✗ Branch 1 not taken.
 81626 if (!s->mcsel) {
827 81626 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
828
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 81626 times.
 81626 if (mx >= 0xffff)
829 ✗ return AVERROR_INVALIDDATA;
830
831 81626 my = ff_h263_decode_motion(s, pred_y, s->f_code);
832
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 81626 times.
 81626 if (my >= 0xffff)
833 ✗ return AVERROR_INVALIDDATA;
834 81626 s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
835 MB_TYPE_L0;
836 } else {
837 ✗ mx = get_amv(ctx, 0);
838 ✗ my = get_amv(ctx, 1);
839 ✗ s->current_picture.mb_type[xy] = MB_TYPE_16x16 |
840 MB_TYPE_GMC |
841 MB_TYPE_L0;
842 }
843
844 81626 mot_val[0] =
845 81626 mot_val[2] =
846 81626 mot_val[0 + stride] =
847 81626 mot_val[2 + stride] = mx;
848 81626 mot_val[1] =
849 81626 mot_val[3] =
850 81626 mot_val[1 + stride] =
851 81626 mot_val[3 + stride] = my;
852 } else {
853 int i;
854 31831 s->current_picture.mb_type[xy] = MB_TYPE_8x8 |
855 MB_TYPE_L0;
856
2/2
✓ Branch 0 taken 127324 times.
✓ Branch 1 taken 31831 times.
 159155 for (i = 0; i < 4; i++) {
857 127324 int16_t *mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
858 127324 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
859
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 127324 times.
 127324 if (mx >= 0xffff)
860 ✗ return AVERROR_INVALIDDATA;
861
862 127324 my = ff_h263_decode_motion(s, pred_y, s->f_code);
863
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 127324 times.
 127324 if (my >= 0xffff)
864 ✗ return AVERROR_INVALIDDATA;
865 127324 mot_val[0] = mx;
866 127324 mot_val[1] = my;
867 }
868 }
869 }
870 }
871 }
872 6583 s->mb_x = 0;
873 }
874
875 472 return mb_num;
876 }
877
878 /**
879 * decode second partition.
880 * @return <0 if an error occurred
881 */
882 1728 static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
883 {
884 1728 int mb_num = 0;
885 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
886
887 1728 s->mb_x = s->resync_mb_x;
888 1728 s->first_slice_line = 1;
889
1/2
✓ Branch 0 taken 7728 times.
✗ Branch 1 not taken.
 7728 for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) {
890 7728 ff_init_block_index(s);
891
4/4
✓ Branch 0 taken 144064 times.
✓ Branch 1 taken 1728 times.
✓ Branch 2 taken 138064 times.
✓ Branch 3 taken 6000 times.
 145792 for (; mb_num < mb_count && s->mb_x < s->mb_width; s->mb_x++) {
892 138064 const int xy = s->mb_x + s->mb_y * s->mb_stride;
893
894 138064 mb_num++;
895 138064 ff_update_block_index(s);
896
4/4
✓ Branch 0 taken 7338 times.
✓ Branch 1 taken 130726 times.
✓ Branch 2 taken 1611 times.
✓ Branch 3 taken 5727 times.
 138064 if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1)
897 1611 s->first_slice_line = 0;
898
899
2/2
✓ Branch 0 taken 17323 times.
✓ Branch 1 taken 120741 times.
 138064 if (s->pict_type == AV_PICTURE_TYPE_I) {
900 17323 int ac_pred = get_bits1(&s->gb);
901 17323 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
902
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
 17323 if (cbpy < 0) {
903 ✗ av_log(s->avctx, AV_LOG_ERROR,
904 "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
905 ✗ return AVERROR_INVALIDDATA;
906 }
907
908 17323 s->cbp_table[xy] |= cbpy << 2;
909 17323 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
910 } else { /* P || S_TYPE */
911
2/2
✓ Branch 0 taken 6287 times.
✓ Branch 1 taken 114454 times.
 120741 if (IS_INTRA(s->current_picture.mb_type[xy])) {
912 int i;
913 6287 int dir = 0;
914 6287 int ac_pred = get_bits1(&s->gb);
915 6287 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
916
917
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6287 times.
 6287 if (cbpy < 0) {
918 ✗ av_log(s->avctx, AV_LOG_ERROR,
919 "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
920 ✗ return AVERROR_INVALIDDATA;
921 }
922
923
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6287 times.
 6287 if (s->cbp_table[xy] & 8)
924 ✗ ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
925 6287 s->current_picture.qscale_table[xy] = s->qscale;
926
927
2/2
✓ Branch 0 taken 37722 times.
✓ Branch 1 taken 6287 times.
 44009 for (i = 0; i < 6; i++) {
928 int dc_pred_dir;
929 37722 int dc = mpeg4_decode_dc(s, i, &dc_pred_dir);
930
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 37722 times.
 37722 if (dc < 0) {
931 ✗ av_log(s->avctx, AV_LOG_ERROR,
932 "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
933 ✗ return dc;
934 }
935 37722 dir <<= 1;
936
2/2
✓ Branch 0 taken 11780 times.
✓ Branch 1 taken 25942 times.
 37722 if (dc_pred_dir)
937 11780 dir |= 1;
938 }
939 6287 s->cbp_table[xy] &= 3; // remove dquant
940 6287 s->cbp_table[xy] |= cbpy << 2;
941 6287 s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED;
942 6287 s->pred_dir_table[xy] = dir;
943
2/2
✓ Branch 0 taken 997 times.
✓ Branch 1 taken 113457 times.
 114454 } else if (IS_SKIP(s->current_picture.mb_type[xy])) {
944 997 s->current_picture.qscale_table[xy] = s->qscale;
945 997 s->cbp_table[xy] = 0;
946 } else {
947 113457 int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
948
949
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 113457 times.
 113457 if (cbpy < 0) {
950 ✗ av_log(s->avctx, AV_LOG_ERROR,
951 "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
952 ✗ return AVERROR_INVALIDDATA;
953 }
954
955
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 113457 times.
 113457 if (s->cbp_table[xy] & 8)
956 ✗ ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
957 113457 s->current_picture.qscale_table[xy] = s->qscale;
958
959 113457 s->cbp_table[xy] &= 3; // remove dquant
960 113457 s->cbp_table[xy] |= (cbpy ^ 0xf) << 2;
961 }
962 }
963 }
964
2/2
✓ Branch 0 taken 1728 times.
✓ Branch 1 taken 6000 times.
 7728 if (mb_num >= mb_count)
965 1728 return 0;
966 6000 s->mb_x = 0;
967 }
968 ✗ return 0;
969 }
970
971 /**
972 * Decode the first and second partition.
973 * @return <0 if error (and sets error type in the error_status_table)
974 */
975 1728 int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx)
976 {
977 1728 MpegEncContext *s = &ctx->m;
978 int mb_num;
979 int ret;
980
2/2
✓ Branch 0 taken 499 times.
✓ Branch 1 taken 1229 times.
 1728 const int part_a_error = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR;
981
2/2
✓ Branch 0 taken 499 times.
✓ Branch 1 taken 1229 times.
 1728 const int part_a_end = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END;
982
983 1728 mb_num = mpeg4_decode_partition_a(ctx);
984
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1728 times.
 1728 if (mb_num <= 0) {
985 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
986 s->mb_x, s->mb_y, part_a_error);
987 ✗ return mb_num ? mb_num : AVERROR_INVALIDDATA;
988 }
989
990
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1728 times.
 1728 if (s->resync_mb_x + s->resync_mb_y * s->mb_width + mb_num > s->mb_num) {
991 ✗ av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n");
992 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
993 s->mb_x, s->mb_y, part_a_error);
994 ✗ return AVERROR_INVALIDDATA;
995 }
996
997 1728 s->mb_num_left = mb_num;
998
999
2/2
✓ Branch 0 taken 499 times.
✓ Branch 1 taken 1229 times.
 1728 if (s->pict_type == AV_PICTURE_TYPE_I) {
1000
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 499 times.
 499 while (show_bits(&s->gb, 9) == 1)
1001 ✗ skip_bits(&s->gb, 9);
1002
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 499 times.
 499 if (get_bits(&s->gb, 19) != DC_MARKER) {
1003 ✗ av_log(s->avctx, AV_LOG_ERROR,
1004 "marker missing after first I partition at %d %d\n",
1005 s->mb_x, s->mb_y);
1006 ✗ return AVERROR_INVALIDDATA;
1007 }
1008 } else {
1009
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1229 times.
 1229 while (show_bits(&s->gb, 10) == 1)
1010 ✗ skip_bits(&s->gb, 10);
1011
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1229 times.
 1229 if (get_bits(&s->gb, 17) != MOTION_MARKER) {
1012 ✗ av_log(s->avctx, AV_LOG_ERROR,
1013 "marker missing after first P partition at %d %d\n",
1014 s->mb_x, s->mb_y);
1015 ✗ return AVERROR_INVALIDDATA;
1016 }
1017 }
1018 1728 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1019 1728 s->mb_x - 1, s->mb_y, part_a_end);
1020
1021 1728 ret = mpeg4_decode_partition_b(s, mb_num);
1022
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1728 times.
 1728 if (ret < 0) {
1023 ✗ if (s->pict_type == AV_PICTURE_TYPE_P)
1024 ✗ ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1025 s->mb_x, s->mb_y, ER_DC_ERROR);
1026 ✗ return ret;
1027 } else {
1028
2/2
✓ Branch 0 taken 1229 times.
✓ Branch 1 taken 499 times.
 1728 if (s->pict_type == AV_PICTURE_TYPE_P)
1029 1229 ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
1030 1229 s->mb_x - 1, s->mb_y, ER_DC_END);
1031 }
1032
1033 1728 return 0;
1034 }
1035
1036 /**
1037 * Decode a block.
1038 * @return <0 if an error occurred
1039 */
1040 7873800 static inline int mpeg4_decode_block(Mpeg4DecContext *ctx, int16_t *block,
1041 int n, int coded, int intra, int rvlc)
1042 {
1043 7873800 MpegEncContext *s = &ctx->m;
1044 int level, i, last, run, qmul, qadd;
1045 7873800 int av_uninit(dc_pred_dir);
1046 RLTable *rl;
1047 RL_VLC_ELEM *rl_vlc;
1048 const uint8_t *scan_table;
1049
1050 // Note intra & rvlc should be optimized away if this is inlined
1051
1052
2/2
✓ Branch 0 taken 1068954 times.
✓ Branch 1 taken 6804846 times.
 7873800 if (intra) {
1053
1/2
✓ Branch 0 taken 1068954 times.
✗ Branch 1 not taken.
 1068954 if (ctx->use_intra_dc_vlc) {
1054 /* DC coef */
1055
2/2
✓ Branch 0 taken 141660 times.
✓ Branch 1 taken 927294 times.
 1068954 if (s->partitioned_frame) {
1056 141660 level = s->dc_val[0][s->block_index[n]];
1057
2/2
✓ Branch 0 taken 94440 times.
✓ Branch 1 taken 47220 times.
 141660 if (n < 4)
1058 94440 level = FASTDIV((level + (s->y_dc_scale >> 1)), s->y_dc_scale);
1059 else
1060 47220 level = FASTDIV((level + (s->c_dc_scale >> 1)), s->c_dc_scale);
1061 141660 dc_pred_dir = (s->pred_dir_table[s->mb_x + s->mb_y * s->mb_stride] << n) & 32;
1062 } else {
1063 927294 level = mpeg4_decode_dc(s, n, &dc_pred_dir);
1064
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 927294 times.
 927294 if (level < 0)
1065 ✗ return level;
1066 }
1067 1068954 block[0] = level;
1068 1068954 i = 0;
1069 } else {
1070 ✗ i = -1;
1071 ✗ ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0);
1072 }
1073
2/2
✓ Branch 0 taken 215012 times.
✓ Branch 1 taken 853942 times.
 1068954 if (!coded)
1074 215012 goto not_coded;
1075
1076
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 853942 times.
 853942 if (rvlc) {
1077 ✗ rl = &ff_rvlc_rl_intra;
1078 ✗ rl_vlc = ff_rvlc_rl_intra.rl_vlc[0];
1079 } else {
1080 853942 rl = &ff_mpeg4_rl_intra;
1081 853942 rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0];
1082 }
1083
2/2
✓ Branch 0 taken 22081 times.
✓ Branch 1 taken 831861 times.
 853942 if (s->ac_pred) {
1084
2/2
✓ Branch 0 taken 15515 times.
✓ Branch 1 taken 6566 times.
 22081 if (dc_pred_dir == 0)
1085 15515 scan_table = s->intra_v_scantable.permutated; /* left */
1086 else
1087 6566 scan_table = s->intra_h_scantable.permutated; /* top */
1088 } else {
1089 831861 scan_table = s->intra_scantable.permutated;
1090 }
1091 853942 qmul = 1;
1092 853942 qadd = 0;
1093 } else {
1094 6804846 i = -1;
1095
2/2
✓ Branch 0 taken 4621462 times.
✓ Branch 1 taken 2183384 times.
 6804846 if (!coded) {
1096 4621462 s->block_last_index[n] = i;
1097 4621462 return 0;
1098 }
1099
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2183384 times.
 2183384 if (rvlc)
1100 ✗ rl = &ff_rvlc_rl_inter;
1101 else
1102 2183384 rl = &ff_h263_rl_inter;
1103
1104 2183384 scan_table = s->intra_scantable.permutated;
1105
1106
2/2
✓ Branch 0 taken 11882 times.
✓ Branch 1 taken 2171502 times.
 2183384 if (s->mpeg_quant) {
1107 11882 qmul = 1;
1108 11882 qadd = 0;
1109
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 11882 times.
 11882 if (rvlc)
1110 ✗ rl_vlc = ff_rvlc_rl_inter.rl_vlc[0];
1111 else
1112 11882 rl_vlc = ff_h263_rl_inter.rl_vlc[0];
1113 } else {
1114 2171502 qmul = s->qscale << 1;
1115 2171502 qadd = (s->qscale - 1) | 1;
1116
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2171502 times.
 2171502 if (rvlc)
1117 ✗ rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale];
1118 else
1119 2171502 rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale];
1120 }
1121 }
1122 {
1123 3037326 OPEN_READER(re, &s->gb);
1124 for (;;) {
1125 26282206 UPDATE_CACHE(re, &s->gb);
1126
2/2
✓ Branch 1 taken 1121528 times.
✓ Branch 2 taken 25160678 times.
 26282206 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
1127
2/2
✓ Branch 0 taken 770420 times.
✓ Branch 1 taken 25511786 times.
 26282206 if (level == 0) {
1128 /* escape */
1129
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 770420 times.
 770420 if (rvlc) {
1130 ✗ if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1131 ✗ av_log(s->avctx, AV_LOG_ERROR,
1132 "1. marker bit missing in rvlc esc\n");
1133 ✗ return AVERROR_INVALIDDATA;
1134 }
1135 ✗ SKIP_CACHE(re, &s->gb, 1);
1136
1137 ✗ last = SHOW_UBITS(re, &s->gb, 1);
1138 ✗ SKIP_CACHE(re, &s->gb, 1);
1139 ✗ run = SHOW_UBITS(re, &s->gb, 6);
1140 ✗ SKIP_COUNTER(re, &s->gb, 1 + 1 + 6);
1141 ✗ UPDATE_CACHE(re, &s->gb);
1142
1143 ✗ if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1144 ✗ av_log(s->avctx, AV_LOG_ERROR,
1145 "2. marker bit missing in rvlc esc\n");
1146 ✗ return AVERROR_INVALIDDATA;
1147 }
1148 ✗ SKIP_CACHE(re, &s->gb, 1);
1149
1150 ✗ level = SHOW_UBITS(re, &s->gb, 11);
1151 ✗ SKIP_CACHE(re, &s->gb, 11);
1152
1153 ✗ if (SHOW_UBITS(re, &s->gb, 5) != 0x10) {
1154 ✗ av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n");
1155 ✗ return AVERROR_INVALIDDATA;
1156 }
1157 ✗ SKIP_CACHE(re, &s->gb, 5);
1158
1159 ✗ level = level * qmul + qadd;
1160 ✗ level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1161 ✗ SKIP_COUNTER(re, &s->gb, 1 + 11 + 5 + 1);
1162
1163 ✗ i += run + 1;
1164 ✗ if (last)
1165 ✗ i += 192;
1166 } else {
1167 int cache;
1168 770420 cache = GET_CACHE(re, &s->gb);
1169
1170 if (IS_3IV1)
1171 cache ^= 0xC0000000;
1172
1173
2/2
✓ Branch 0 taken 353524 times.
✓ Branch 1 taken 416896 times.
 770420 if (cache & 0x80000000) {
1174
2/2
✓ Branch 0 taken 137781 times.
✓ Branch 1 taken 215743 times.
 353524 if (cache & 0x40000000) {
1175 /* third escape */
1176 137781 SKIP_CACHE(re, &s->gb, 2);
1177 137781 last = SHOW_UBITS(re, &s->gb, 1);
1178 137781 SKIP_CACHE(re, &s->gb, 1);
1179 137781 run = SHOW_UBITS(re, &s->gb, 6);
1180 137781 SKIP_COUNTER(re, &s->gb, 2 + 1 + 6);
1181 137781 UPDATE_CACHE(re, &s->gb);
1182
1183 if (IS_3IV1) {
1184 level = SHOW_SBITS(re, &s->gb, 12);
1185 LAST_SKIP_BITS(re, &s->gb, 12);
1186 } else {
1187
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 137781 times.
 137781 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1188 ✗ av_log(s->avctx, AV_LOG_ERROR,
1189 "1. marker bit missing in 3. esc\n");
1190 ✗ if (!(s->avctx->err_recognition & AV_EF_IGNORE_ERR))
1191 ✗ return AVERROR_INVALIDDATA;
1192 }
1193 137781 SKIP_CACHE(re, &s->gb, 1);
1194
1195 137781 level = SHOW_SBITS(re, &s->gb, 12);
1196 137781 SKIP_CACHE(re, &s->gb, 12);
1197
1198
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 137781 times.
 137781 if (SHOW_UBITS(re, &s->gb, 1) == 0) {
1199 ✗ av_log(s->avctx, AV_LOG_ERROR,
1200 "2. marker bit missing in 3. esc\n");
1201 ✗ if (!(s->avctx->err_recognition & AV_EF_IGNORE_ERR))
1202 ✗ return AVERROR_INVALIDDATA;
1203 }
1204
1205 137781 SKIP_COUNTER(re, &s->gb, 1 + 12 + 1);
1206 }
1207
1208 #if 0
1209 if (s->error_recognition >= FF_ER_COMPLIANT) {
1210 const int abs_level= FFABS(level);
1211 if (abs_level<=MAX_LEVEL && run<=MAX_RUN) {
1212 const int run1= run - rl->max_run[last][abs_level] - 1;
1213 if (abs_level <= rl->max_level[last][run]) {
1214 av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
1215 return AVERROR_INVALIDDATA;
1216 }
1217 if (s->error_recognition > FF_ER_COMPLIANT) {
1218 if (abs_level <= rl->max_level[last][run]*2) {
1219 av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
1220 return AVERROR_INVALIDDATA;
1221 }
1222 if (run1 >= 0 && abs_level <= rl->max_level[last][run1]) {
1223 av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
1224 return AVERROR_INVALIDDATA;
1225 }
1226 }
1227 }
1228 }
1229 #endif
1230
2/2
✓ Branch 0 taken 69038 times.
✓ Branch 1 taken 68743 times.
 137781 if (level > 0)
1231 69038 level = level * qmul + qadd;
1232 else
1233 68743 level = level * qmul - qadd;
1234
1235
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 137781 times.
 137781 if ((unsigned)(level + 2048) > 4095) {
1236 ✗ if (s->avctx->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)) {
1237 ✗ if (level > 2560 || level < -2560) {
1238 ✗ av_log(s->avctx, AV_LOG_ERROR,
1239 "|level| overflow in 3. esc, qp=%d\n",
1240 s->qscale);
1241 ✗ return AVERROR_INVALIDDATA;
1242 }
1243 }
1244 ✗ level = level < 0 ? -2048 : 2047;
1245 }
1246
1247 137781 i += run + 1;
1248
2/2
✓ Branch 0 taken 44545 times.
✓ Branch 1 taken 93236 times.
 137781 if (last)
1249 44545 i += 192;
1250 } else {
1251 /* second escape */
1252 215743 SKIP_BITS(re, &s->gb, 2);
1253
2/2
✓ Branch 1 taken 23515 times.
✓ Branch 2 taken 192228 times.
 215743 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1254 215743 i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing
1255 215743 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1256 215743 LAST_SKIP_BITS(re, &s->gb, 1);
1257 }
1258 } else {
1259 /* first escape */
1260 416896 SKIP_BITS(re, &s->gb, 1);
1261
2/2
✓ Branch 1 taken 67722 times.
✓ Branch 2 taken 349174 times.
 416896 GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
1262 416896 i += run;
1263 416896 level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing
1264 416896 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1265 416896 LAST_SKIP_BITS(re, &s->gb, 1);
1266 }
1267 }
1268 } else {
1269 25511786 i += run;
1270 25511786 level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
1271 25511786 LAST_SKIP_BITS(re, &s->gb, 1);
1272 }
1273 ff_tlog(s->avctx, "dct[%d][%d] = %- 4d end?:%d\n", scan_table[i&63]&7, scan_table[i&63] >> 3, level, i>62);
1274
2/2
✓ Branch 0 taken 3037326 times.
✓ Branch 1 taken 23244880 times.
 26282206 if (i > 62) {
1275 3037326 i -= 192;
1276
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3037326 times.
 3037326 if (i & (~63)) {
1277 ✗ av_log(s->avctx, AV_LOG_ERROR,
1278 "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
1279 ✗ return AVERROR_INVALIDDATA;
1280 }
1281
1282 3037326 block[scan_table[i]] = level;
1283 3037326 break;
1284 }
1285
1286 23244880 block[scan_table[i]] = level;
1287 }
1288 3037326 CLOSE_READER(re, &s->gb);
1289 }
1290
1291 3252338 not_coded:
1292
2/2
✓ Branch 0 taken 1068954 times.
✓ Branch 1 taken 2183384 times.
 3252338 if (intra) {
1293
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1068954 times.
 1068954 if (!ctx->use_intra_dc_vlc) {
1294 ✗ block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);
1295
1296 ✗ i -= i >> 31; // if (i == -1) i = 0;
1297 }
1298
1299 1068954 ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
1300
2/2
✓ Branch 0 taken 25890 times.
✓ Branch 1 taken 1043064 times.
 1068954 if (s->ac_pred)
1301 25890 i = 63; // FIXME not optimal
1302 }
1303 3252338 s->block_last_index[n] = i;
1304 3252338 return 0;
1305 }
1306
1307 /**
1308 * decode partition C of one MB.
1309 * @return <0 if an error occurred
1310 */
1311 138064 static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
1312 {
1313 138064 Mpeg4DecContext *ctx = s->avctx->priv_data;
1314 int cbp, mb_type;
1315 138064 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1316
1317 av_assert2(s == (void*)ctx);
1318
1319 138064 mb_type = s->current_picture.mb_type[xy];
1320 138064 cbp = s->cbp_table[xy];
1321
1322 138064 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1323
1324
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 138064 times.
 138064 if (s->current_picture.qscale_table[xy] != s->qscale)
1325 ✗ ff_set_qscale(s, s->current_picture.qscale_table[xy]);
1326
1327
2/2
✓ Branch 0 taken 17323 times.
✓ Branch 1 taken 120741 times.
 138064 if (s->pict_type == AV_PICTURE_TYPE_P ||
1328
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 17323 times.
 138064 s->pict_type == AV_PICTURE_TYPE_S) {
1329 int i;
1330
2/2
✓ Branch 0 taken 482964 times.
✓ Branch 1 taken 120741 times.
 603705 for (i = 0; i < 4; i++) {
1331 482964 s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
1332 482964 s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
1333 }
1334 120741 s->mb_intra = IS_INTRA(mb_type);
1335
1336
2/2
✓ Branch 0 taken 997 times.
✓ Branch 1 taken 119744 times.
 120741 if (IS_SKIP(mb_type)) {
1337 /* skip mb */
1338
2/2
✓ Branch 0 taken 5982 times.
✓ Branch 1 taken 997 times.
 6979 for (i = 0; i < 6; i++)
1339 5982 s->block_last_index[i] = -1;
1340 997 s->mv_dir = MV_DIR_FORWARD;
1341 997 s->mv_type = MV_TYPE_16X16;
1342
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 997 times.
 997 if (s->pict_type == AV_PICTURE_TYPE_S
1343 ✗ && ctx->vol_sprite_usage == GMC_SPRITE) {
1344 ✗ s->mcsel = 1;
1345 ✗ s->mb_skipped = 0;
1346 } else {
1347 997 s->mcsel = 0;
1348 997 s->mb_skipped = 1;
1349 }
1350
2/2
✓ Branch 0 taken 6287 times.
✓ Branch 1 taken 113457 times.
 119744 } else if (s->mb_intra) {
1351 6287 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1352
1/2
✓ Branch 0 taken 113457 times.
✗ Branch 1 not taken.
 113457 } else if (!s->mb_intra) {
1353 // s->mcsel = 0; // FIXME do we need to init that?
1354
1355 113457 s->mv_dir = MV_DIR_FORWARD;
1356
2/2
✓ Branch 0 taken 31831 times.
✓ Branch 1 taken 81626 times.
 113457 if (IS_8X8(mb_type)) {
1357 31831 s->mv_type = MV_TYPE_8X8;
1358 } else {
1359 81626 s->mv_type = MV_TYPE_16X16;
1360 }
1361 }
1362 } else { /* I-Frame */
1363 17323 s->mb_intra = 1;
1364 17323 s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
1365 }
1366
1367
2/2
✓ Branch 0 taken 137067 times.
✓ Branch 1 taken 997 times.
 138064 if (!IS_SKIP(mb_type)) {
1368 int i;
1369 137067 s->bdsp.clear_blocks(s->block[0]);
1370 /* decode each block */
1371
2/2
✓ Branch 0 taken 822402 times.
✓ Branch 1 taken 137067 times.
 959469 for (i = 0; i < 6; i++) {
1372
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 822402 times.
 822402 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, s->mb_intra, ctx->rvlc) < 0) {
1373 ✗ av_log(s->avctx, AV_LOG_ERROR,
1374 "texture corrupted at %d %d %d\n",
1375 s->mb_x, s->mb_y, s->mb_intra);
1376 ✗ return AVERROR_INVALIDDATA;
1377 }
1378 822402 cbp += cbp;
1379 }
1380 }
1381
1382 /* per-MB end of slice check */
1383
2/2
✓ Branch 0 taken 1728 times.
✓ Branch 1 taken 136336 times.
 138064 if (--s->mb_num_left <= 0) {
1384
1/2
✓ Branch 1 taken 1728 times.
✗ Branch 2 not taken.
 1728 if (mpeg4_is_resync(ctx))
1385 1728 return SLICE_END;
1386 else
1387 ✗ return SLICE_NOEND;
1388 } else {
1389
2/2
✓ Branch 1 taken 308 times.
✓ Branch 2 taken 136028 times.
 136336 if (mpeg4_is_resync(ctx)) {
1390
2/2
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 302 times.
 308 const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1;
1391
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 308 times.
 308 if (s->cbp_table[xy + delta])
1392 ✗ return SLICE_END;
1393 }
1394 136336 return SLICE_OK;
1395 }
1396 }
1397
1398 1289056 static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
1399 {
1400 1289056 Mpeg4DecContext *ctx = s->avctx->priv_data;
1401 int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
1402 int16_t *mot_val;
1403 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
1404 1289056 const int xy = s->mb_x + s->mb_y * s->mb_stride;
1405
1406 av_assert2(s == (void*)ctx);
1407 av_assert2(s->h263_pred);
1408
1409
2/2
✓ Branch 0 taken 367659 times.
✓ Branch 1 taken 921397 times.
 1289056 if (s->pict_type == AV_PICTURE_TYPE_P ||
1410
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 367659 times.
 367659 s->pict_type == AV_PICTURE_TYPE_S) {
1411 do {
1412
2/2
✓ Branch 1 taken 80953 times.
✓ Branch 2 taken 840444 times.
 921397 if (get_bits1(&s->gb)) {
1413 /* skip mb */
1414 80953 s->mb_intra = 0;
1415
2/2
✓ Branch 0 taken 485718 times.
✓ Branch 1 taken 80953 times.
 566671 for (i = 0; i < 6; i++)
1416 485718 s->block_last_index[i] = -1;
1417 80953 s->mv_dir = MV_DIR_FORWARD;
1418 80953 s->mv_type = MV_TYPE_16X16;
1419
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 80953 times.
 80953 if (s->pict_type == AV_PICTURE_TYPE_S &&
1420 ✗ ctx->vol_sprite_usage == GMC_SPRITE) {
1421 ✗ s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1422 MB_TYPE_GMC |
1423 MB_TYPE_16x16 |
1424 MB_TYPE_L0;
1425 ✗ s->mcsel = 1;
1426 ✗ s->mv[0][0][0] = get_amv(ctx, 0);
1427 ✗ s->mv[0][0][1] = get_amv(ctx, 1);
1428 ✗ s->mb_skipped = 0;
1429 } else {
1430 80953 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1431 MB_TYPE_16x16 |
1432 MB_TYPE_L0;
1433 80953 s->mcsel = 0;
1434 80953 s->mv[0][0][0] = 0;
1435 80953 s->mv[0][0][1] = 0;
1436 80953 s->mb_skipped = 1;
1437 }
1438 80953 goto end;
1439 }
1440 840444 cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
1441
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 840444 times.
 840444 if (cbpc < 0) {
1442 ✗ av_log(s->avctx, AV_LOG_ERROR,
1443 "mcbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1444 ✗ return AVERROR_INVALIDDATA;
1445 }
1446
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 840444 times.
 840444 } while (cbpc == 20);
1447
1448 840444 s->bdsp.clear_blocks(s->block[0]);
1449 840444 dquant = cbpc & 8;
1450 840444 s->mb_intra = ((cbpc & 4) != 0);
1451
2/2
✓ Branch 0 taken 27278 times.
✓ Branch 1 taken 813166 times.
 840444 if (s->mb_intra)
1452 27278 goto intra;
1453
1454
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 813166 times.
 813166 if (s->pict_type == AV_PICTURE_TYPE_S &&
1455 ✗ ctx->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0)
1456 ✗ s->mcsel = get_bits1(&s->gb);
1457 else
1458 813166 s->mcsel = 0;
1459 813166 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F;
1460
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 813166 times.
 813166 if (cbpy < 0) {
1461 ✗ av_log(s->avctx, AV_LOG_ERROR,
1462 "P cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
1463 ✗ return AVERROR_INVALIDDATA;
1464 }
1465
1466 813166 cbp = (cbpc & 3) | (cbpy << 2);
1467
2/2
✓ Branch 0 taken 9237 times.
✓ Branch 1 taken 803929 times.
 813166 if (dquant)
1468 9237 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1469
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 813166 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 813166 if ((!s->progressive_sequence) &&
1470 ✗ (cbp || (s->workaround_bugs & FF_BUG_XVID_ILACE)))
1471 ✗ s->interlaced_dct = get_bits1(&s->gb);
1472
1473 813166 s->mv_dir = MV_DIR_FORWARD;
1474
2/2
✓ Branch 0 taken 721166 times.
✓ Branch 1 taken 92000 times.
 813166 if ((cbpc & 16) == 0) {
1475
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 721166 times.
 721166 if (s->mcsel) {
1476 ✗ s->current_picture.mb_type[xy] = MB_TYPE_GMC |
1477 MB_TYPE_16x16 |
1478 MB_TYPE_L0;
1479 /* 16x16 global motion prediction */
1480 ✗ s->mv_type = MV_TYPE_16X16;
1481 ✗ mx = get_amv(ctx, 0);
1482 ✗ my = get_amv(ctx, 1);
1483 ✗ s->mv[0][0][0] = mx;
1484 ✗ s->mv[0][0][1] = my;
1485
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 721166 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
 721166 } else if ((!s->progressive_sequence) && get_bits1(&s->gb)) {
1486 ✗ s->current_picture.mb_type[xy] = MB_TYPE_16x8 |
1487 MB_TYPE_L0 |
1488 MB_TYPE_INTERLACED;
1489 /* 16x8 field motion prediction */
1490 ✗ s->mv_type = MV_TYPE_FIELD;
1491
1492 ✗ s->field_select[0][0] = get_bits1(&s->gb);
1493 ✗ s->field_select[0][1] = get_bits1(&s->gb);
1494
1495 ✗ ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1496
1497 ✗ for (i = 0; i < 2; i++) {
1498 ✗ mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1499 ✗ if (mx >= 0xffff)
1500 ✗ return AVERROR_INVALIDDATA;
1501
1502 ✗ my = ff_h263_decode_motion(s, pred_y / 2, s->f_code);
1503 ✗ if (my >= 0xffff)
1504 ✗ return AVERROR_INVALIDDATA;
1505
1506 ✗ s->mv[0][i][0] = mx;
1507 ✗ s->mv[0][i][1] = my;
1508 }
1509 } else {
1510 721166 s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
1511 /* 16x16 motion prediction */
1512 721166 s->mv_type = MV_TYPE_16X16;
1513 721166 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
1514 721166 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1515
1516
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 721166 times.
 721166 if (mx >= 0xffff)
1517 ✗ return AVERROR_INVALIDDATA;
1518
1519 721166 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1520
1521
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 721166 times.
 721166 if (my >= 0xffff)
1522 ✗ return AVERROR_INVALIDDATA;
1523 721166 s->mv[0][0][0] = mx;
1524 721166 s->mv[0][0][1] = my;
1525 }
1526 } else {
1527 92000 s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
1528 92000 s->mv_type = MV_TYPE_8X8;
1529
2/2
✓ Branch 0 taken 368000 times.
✓ Branch 1 taken 92000 times.
 460000 for (i = 0; i < 4; i++) {
1530 368000 mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
1531 368000 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
1532
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 368000 times.
 368000 if (mx >= 0xffff)
1533 ✗ return AVERROR_INVALIDDATA;
1534
1535 368000 my = ff_h263_decode_motion(s, pred_y, s->f_code);
1536
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 368000 times.
 368000 if (my >= 0xffff)
1537 ✗ return AVERROR_INVALIDDATA;
1538 368000 s->mv[0][i][0] = mx;
1539 368000 s->mv[0][i][1] = my;
1540 368000 mot_val[0] = mx;
1541 368000 mot_val[1] = my;
1542 }
1543 }
1544
2/2
✓ Branch 0 taken 240388 times.
✓ Branch 1 taken 127271 times.
 367659 } else if (s->pict_type == AV_PICTURE_TYPE_B) {
1545 int modb1; // first bit of modb
1546 int modb2; // second bit of modb
1547 int mb_type;
1548
1549 240388 s->mb_intra = 0; // B-frames never contain intra blocks
1550 240388 s->mcsel = 0; // ... true gmc blocks
1551
1552
2/2
✓ Branch 0 taken 10354 times.
✓ Branch 1 taken 230034 times.
 240388 if (s->mb_x == 0) {
1553
2/2
✓ Branch 0 taken 20708 times.
✓ Branch 1 taken 10354 times.
 31062 for (i = 0; i < 2; i++) {
1554 20708 s->last_mv[i][0][0] =
1555 20708 s->last_mv[i][0][1] =
1556 20708 s->last_mv[i][1][0] =
1557 20708 s->last_mv[i][1][1] = 0;
1558 }
1559
1560 10354 ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0);
1561 }
1562
1563 /* if we skipped it in the future P-frame than skip it now too */
1564 240388 s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
1565
1566
2/2
✓ Branch 0 taken 32870 times.
✓ Branch 1 taken 207518 times.
 240388 if (s->mb_skipped) {
1567 /* skip mb */
1568
2/2
✓ Branch 0 taken 197220 times.
✓ Branch 1 taken 32870 times.
 230090 for (i = 0; i < 6; i++)
1569 197220 s->block_last_index[i] = -1;
1570
1571 32870 s->mv_dir = MV_DIR_FORWARD;
1572 32870 s->mv_type = MV_TYPE_16X16;
1573 32870 s->mv[0][0][0] =
1574 32870 s->mv[0][0][1] =
1575 32870 s->mv[1][0][0] =
1576 32870 s->mv[1][0][1] = 0;
1577 32870 s->current_picture.mb_type[xy] = MB_TYPE_SKIP |
1578 MB_TYPE_16x16 |
1579 MB_TYPE_L0;
1580 32870 goto end;
1581 }
1582
1583 207518 modb1 = get_bits1(&s->gb);
1584
2/2
✓ Branch 0 taken 44804 times.
✓ Branch 1 taken 162714 times.
 207518 if (modb1) {
1585 // like MB_TYPE_B_DIRECT but no vectors coded
1586 44804 mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1;
1587 44804 cbp = 0;
1588 } else {
1589 162714 modb2 = get_bits1(&s->gb);
1590 162714 mb_type = get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
1591
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 162714 times.
 162714 if (mb_type < 0) {
1592 ✗ av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n");
1593 ✗ return AVERROR_INVALIDDATA;
1594 }
1595 162714 mb_type = mb_type_b_map[mb_type];
1596
2/2
✓ Branch 0 taken 67183 times.
✓ Branch 1 taken 95531 times.
 162714 if (modb2) {
1597 67183 cbp = 0;
1598 } else {
1599 95531 s->bdsp.clear_blocks(s->block[0]);
1600 95531 cbp = get_bits(&s->gb, 6);
1601 }
1602
1603
4/4
✓ Branch 0 taken 120541 times.
✓ Branch 1 taken 42173 times.
✓ Branch 2 taken 69310 times.
✓ Branch 3 taken 51231 times.
 162714 if ((!IS_DIRECT(mb_type)) && cbp) {
1604
2/2
✓ Branch 1 taken 6992 times.
✓ Branch 2 taken 62318 times.
 69310 if (get_bits1(&s->gb))
1605 6992 ff_set_qscale(s, s->qscale + get_bits1(&s->gb) * 4 - 2);
1606 }
1607
1608
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 162714 times.
 162714 if (!s->progressive_sequence) {
1609 ✗ if (cbp)
1610 ✗ s->interlaced_dct = get_bits1(&s->gb);
1611
1612 ✗ if (!IS_DIRECT(mb_type) && get_bits1(&s->gb)) {
1613 ✗ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
1614 ✗ mb_type &= ~MB_TYPE_16x16;
1615
1616 ✗ if (USES_LIST(mb_type, 0)) {
1617 ✗ s->field_select[0][0] = get_bits1(&s->gb);
1618 ✗ s->field_select[0][1] = get_bits1(&s->gb);
1619 }
1620 ✗ if (USES_LIST(mb_type, 1)) {
1621 ✗ s->field_select[1][0] = get_bits1(&s->gb);
1622 ✗ s->field_select[1][1] = get_bits1(&s->gb);
1623 }
1624 }
1625 }
1626
1627 162714 s->mv_dir = 0;
1628
2/2
✓ Branch 0 taken 120541 times.
✓ Branch 1 taken 42173 times.
 162714 if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) {
1629 120541 s->mv_type = MV_TYPE_16X16;
1630
1631
2/2
✓ Branch 0 taken 82655 times.
✓ Branch 1 taken 37886 times.
 120541 if (USES_LIST(mb_type, 0)) {
1632 82655 s->mv_dir = MV_DIR_FORWARD;
1633
1634 82655 mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
1635 82655 my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
1636 82655 s->last_mv[0][1][0] =
1637 82655 s->last_mv[0][0][0] =
1638 82655 s->mv[0][0][0] = mx;
1639 82655 s->last_mv[0][1][1] =
1640 82655 s->last_mv[0][0][1] =
1641 82655 s->mv[0][0][1] = my;
1642 }
1643
1644
2/2
✓ Branch 0 taken 94596 times.
✓ Branch 1 taken 25945 times.
 120541 if (USES_LIST(mb_type, 1)) {
1645 94596 s->mv_dir |= MV_DIR_BACKWARD;
1646
1647 94596 mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
1648 94596 my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
1649 94596 s->last_mv[1][1][0] =
1650 94596 s->last_mv[1][0][0] =
1651 94596 s->mv[1][0][0] = mx;
1652 94596 s->last_mv[1][1][1] =
1653 94596 s->last_mv[1][0][1] =
1654 94596 s->mv[1][0][1] = my;
1655 }
1656
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 42173 times.
 42173 } else if (!IS_DIRECT(mb_type)) {
1657 ✗ s->mv_type = MV_TYPE_FIELD;
1658
1659 ✗ if (USES_LIST(mb_type, 0)) {
1660 ✗ s->mv_dir = MV_DIR_FORWARD;
1661
1662 ✗ for (i = 0; i < 2; i++) {
1663 ✗ mx = ff_h263_decode_motion(s, s->last_mv[0][i][0], s->f_code);
1664 ✗ my = ff_h263_decode_motion(s, s->last_mv[0][i][1] / 2, s->f_code);
1665 ✗ s->last_mv[0][i][0] =
1666 ✗ s->mv[0][i][0] = mx;
1667 ✗ s->last_mv[0][i][1] = (s->mv[0][i][1] = my) * 2;
1668 }
1669 }
1670
1671 ✗ if (USES_LIST(mb_type, 1)) {
1672 ✗ s->mv_dir |= MV_DIR_BACKWARD;
1673
1674 ✗ for (i = 0; i < 2; i++) {
1675 ✗ mx = ff_h263_decode_motion(s, s->last_mv[1][i][0], s->b_code);
1676 ✗ my = ff_h263_decode_motion(s, s->last_mv[1][i][1] / 2, s->b_code);
1677 ✗ s->last_mv[1][i][0] =
1678 ✗ s->mv[1][i][0] = mx;
1679 ✗ s->last_mv[1][i][1] = (s->mv[1][i][1] = my) * 2;
1680 }
1681 }
1682 }
1683 }
1684
1685
2/2
✓ Branch 0 taken 86977 times.
✓ Branch 1 taken 120541 times.
 207518 if (IS_DIRECT(mb_type)) {
1686
2/2
✓ Branch 0 taken 44804 times.
✓ Branch 1 taken 42173 times.
 86977 if (IS_SKIP(mb_type)) {
1687 44804 mx =
1688 44804 my = 0;
1689 } else {
1690 42173 mx = ff_h263_decode_motion(s, 0, 1);
1691 42173 my = ff_h263_decode_motion(s, 0, 1);
1692 }
1693
1694 86977 s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
1695 86977 mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
1696 }
1697 207518 s->current_picture.mb_type[xy] = mb_type;
1698 } else { /* I-Frame */
1699 do {
1700 127271 cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
1701
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 127271 times.
 127271 if (cbpc < 0) {
1702 ✗ av_log(s->avctx, AV_LOG_ERROR,
1703 "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
1704 ✗ return AVERROR_INVALIDDATA;
1705 }
1706
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 127271 times.
 127271 } while (cbpc == 8);
1707
1708 127271 dquant = cbpc & 4;
1709 127271 s->mb_intra = 1;
1710
1711 154549 intra:
1712 154549 s->ac_pred = get_bits1(&s->gb);
1713
2/2
✓ Branch 0 taken 552 times.
✓ Branch 1 taken 153997 times.
 154549 if (s->ac_pred)
1714 552 s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED;
1715 else
1716 153997 s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
1717
1718 154549 cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
1719
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 154549 times.
 154549 if (cbpy < 0) {
1720 ✗ av_log(s->avctx, AV_LOG_ERROR,
1721 "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
1722 ✗ return AVERROR_INVALIDDATA;
1723 }
1724 154549 cbp = (cbpc & 3) | (cbpy << 2);
1725
1726 154549 ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold;
1727
1728
2/2
✓ Branch 0 taken 7107 times.
✓ Branch 1 taken 147442 times.
 154549 if (dquant)
1729 7107 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1730
1731
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 154549 times.
 154549 if (!s->progressive_sequence)
1732 ✗ s->interlaced_dct = get_bits1(&s->gb);
1733
1734 154549 s->bdsp.clear_blocks(s->block[0]);
1735 /* decode each block */
1736
2/2
✓ Branch 0 taken 927294 times.
✓ Branch 1 taken 154549 times.
 1081843 for (i = 0; i < 6; i++) {
1737
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 927294 times.
 927294 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 1, 0) < 0)
1738 ✗ return AVERROR_INVALIDDATA;
1739 927294 cbp += cbp;
1740 }
1741 154549 goto end;
1742 }
1743
1744 /* decode each block */
1745
2/2
✓ Branch 0 taken 6124104 times.
✓ Branch 1 taken 1020684 times.
 7144788 for (i = 0; i < 6; i++) {
1746
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 6124104 times.
 6124104 if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 0, 0) < 0)
1747 ✗ return AVERROR_INVALIDDATA;
1748 6124104 cbp += cbp;
1749 }
1750
1751 1020684 end:
1752 /* per-MB end of slice check */
1753
1/2
✓ Branch 0 taken 1289056 times.
✗ Branch 1 not taken.
 1289056 if (s->codec_id == AV_CODEC_ID_MPEG4) {
1754 1289056 int next = mpeg4_is_resync(ctx);
1755
2/2
✓ Branch 0 taken 13412 times.
✓ Branch 1 taken 1275644 times.
 1289056 if (next) {
1756
3/4
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 13407 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 5 times.
 13412 if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
1757 ✗ return AVERROR_INVALIDDATA;
1758
2/2
✓ Branch 0 taken 5468 times.
✓ Branch 1 taken 7944 times.
 13412 } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
1759 5468 return SLICE_END;
1760
1761
1/2
✓ Branch 0 taken 7944 times.
✗ Branch 1 not taken.
 7944 if (s->pict_type == AV_PICTURE_TYPE_B) {
1762
2/2
✓ Branch 0 taken 168 times.
✓ Branch 1 taken 7776 times.
 7944 const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
1763 7944 ff_thread_await_progress(&s->next_picture_ptr->tf,
1764
2/2
✓ Branch 0 taken 168 times.
✓ Branch 1 taken 7776 times.
 7944 (s->mb_x + delta >= s->mb_width)
1765
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 168 times.
 168 ? FFMIN(s->mb_y + 1, s->mb_height - 1)
1766 : s->mb_y, 0);
1767
1/2
✓ Branch 0 taken 7944 times.
✗ Branch 1 not taken.
 7944 if (s->next_picture.mbskip_table[xy + delta])
1768 7944 return SLICE_OK;
1769 }
1770
1771 ✗ return SLICE_END;
1772 }
1773 }
1774
1775 1275644 return SLICE_OK;
1776 }
1777
1778 /* As per spec, studio start code search isn't the same as the old type of start code */
1779 ✗ static void next_start_code_studio(GetBitContext *gb)
1780 {
1781 ✗ align_get_bits(gb);
1782
1783 ✗ while (get_bits_left(gb) >= 24 && show_bits(gb, 24) != 0x1) {
1784 ✗ get_bits(gb, 8);
1785 }
1786 }
1787
1788 /* additional_code, vlc index */
1789 static const uint8_t ac_state_tab[22][2] =
1790 {
1791 {0, 0},
1792 {0, 1},
1793 {1, 1},
1794 {2, 1},
1795 {3, 1},
1796 {4, 1},
1797 {5, 1},
1798 {1, 2},
1799 {2, 2},
1800 {3, 2},
1801 {4, 2},
1802 {5, 2},
1803 {6, 2},
1804 {1, 3},
1805 {2, 4},
1806 {3, 5},
1807 {4, 6},
1808 {5, 7},
1809 {6, 8},
1810 {7, 9},
1811 {8, 10},
1812 {0, 11}
1813 };
1814
1815 ✗ static int mpeg4_decode_studio_block(MpegEncContext *s, int32_t block[64], int n)
1816 {
1817 ✗ Mpeg4DecContext *ctx = s->avctx->priv_data;
1818
1819 ✗ int cc, dct_dc_size, dct_diff, code, j, idx = 1, group = 0, run = 0,
1820 additional_code_len, sign, mismatch;
1821 ✗ const VLC *cur_vlc = &studio_intra_tab[0];
1822 ✗ uint8_t *const scantable = s->intra_scantable.permutated;
1823 const uint16_t *quant_matrix;
1824 uint32_t flc;
1825 ✗ const int min = -1 * (1 << (s->avctx->bits_per_raw_sample + 6));
1826 ✗ const int max = ((1 << (s->avctx->bits_per_raw_sample + 6)) - 1);
1827 ✗ int shift = 3 - s->dct_precision;
1828
1829 ✗ mismatch = 1;
1830
1831 ✗ memset(block, 0, 64 * sizeof(int32_t));
1832
1833 ✗ if (n < 4) {
1834 ✗ cc = 0;
1835 ✗ dct_dc_size = get_vlc2(&s->gb, studio_luma_dc.table, STUDIO_INTRA_BITS, 2);
1836 ✗ quant_matrix = s->intra_matrix;
1837 } else {
1838 ✗ cc = (n & 1) + 1;
1839 ✗ if (ctx->rgb)
1840 ✗ dct_dc_size = get_vlc2(&s->gb, studio_luma_dc.table, STUDIO_INTRA_BITS, 2);
1841 else
1842 ✗ dct_dc_size = get_vlc2(&s->gb, studio_chroma_dc.table, STUDIO_INTRA_BITS, 2);
1843 ✗ quant_matrix = s->chroma_intra_matrix;
1844 }
1845
1846 ✗ if (dct_dc_size == 0) {
1847 ✗ dct_diff = 0;
1848 } else {
1849 ✗ dct_diff = get_xbits(&s->gb, dct_dc_size);
1850
1851 ✗ if (dct_dc_size > 8) {
1852 ✗ if(!check_marker(s->avctx, &s->gb, "dct_dc_size > 8"))
1853 ✗ return AVERROR_INVALIDDATA;
1854 }
1855
1856 }
1857
1858 ✗ s->last_dc[cc] += dct_diff;
1859
1860 ✗ if (s->mpeg_quant)
1861 ✗ block[0] = s->last_dc[cc] * (8 >> s->intra_dc_precision);
1862 else
1863 ✗ block[0] = s->last_dc[cc] * (8 >> s->intra_dc_precision) * (8 >> s->dct_precision);
1864 /* TODO: support mpeg_quant for AC coefficients */
1865
1866 ✗ block[0] = av_clip(block[0], min, max);
1867 ✗ mismatch ^= block[0];
1868
1869 /* AC Coefficients */
1870 while (1) {
1871 ✗ group = get_vlc2(&s->gb, cur_vlc->table, STUDIO_INTRA_BITS, 2);
1872
1873 ✗ if (group < 0) {
1874 ✗ av_log(s->avctx, AV_LOG_ERROR, "illegal ac coefficient group vlc\n");
1875 ✗ return AVERROR_INVALIDDATA;
1876 }
1877
1878 ✗ additional_code_len = ac_state_tab[group][0];
1879 ✗ cur_vlc = &studio_intra_tab[ac_state_tab[group][1]];
1880
1881 ✗ if (group == 0) {
1882 /* End of Block */
1883 ✗ break;
1884 ✗ } else if (group >= 1 && group <= 6) {
1885 /* Zero run length (Table B.47) */
1886 ✗ run = 1 << additional_code_len;
1887 ✗ if (additional_code_len)
1888 ✗ run += get_bits(&s->gb, additional_code_len);
1889 ✗ idx += run;
1890 ✗ continue;
1891 ✗ } else if (group >= 7 && group <= 12) {
1892 /* Zero run length and +/-1 level (Table B.48) */
1893 ✗ code = get_bits(&s->gb, additional_code_len);
1894 ✗ sign = code & 1;
1895 ✗ code >>= 1;
1896 ✗ run = (1 << (additional_code_len - 1)) + code;
1897 ✗ idx += run;
1898 ✗ if (idx > 63)
1899 ✗ return AVERROR_INVALIDDATA;
1900 ✗ j = scantable[idx++];
1901 ✗ block[j] = sign ? 1 : -1;
1902 ✗ } else if (group >= 13 && group <= 20) {
1903 /* Level value (Table B.49) */
1904 ✗ if (idx > 63)
1905 ✗ return AVERROR_INVALIDDATA;
1906 ✗ j = scantable[idx++];
1907 ✗ block[j] = get_xbits(&s->gb, additional_code_len);
1908 ✗ } else if (group == 21) {
1909 /* Escape */
1910 ✗ if (idx > 63)
1911 ✗ return AVERROR_INVALIDDATA;
1912 ✗ j = scantable[idx++];
1913 ✗ additional_code_len = s->avctx->bits_per_raw_sample + s->dct_precision + 4;
1914 ✗ flc = get_bits(&s->gb, additional_code_len);
1915 ✗ if (flc >> (additional_code_len-1))
1916 ✗ block[j] = -1 * (( flc ^ ((1 << additional_code_len) -1)) + 1);
1917 else
1918 ✗ block[j] = flc;
1919 }
1920 ✗ block[j] = ((block[j] * quant_matrix[j] * s->qscale) * (1 << shift)) / 16;
1921 ✗ block[j] = av_clip(block[j], min, max);
1922 ✗ mismatch ^= block[j];
1923 }
1924
1925 ✗ block[63] ^= mismatch & 1;
1926
1927 ✗ return 0;
1928 }
1929
1930 ✗ static int mpeg4_decode_dpcm_macroblock(MpegEncContext *s, int16_t macroblock[256], int n)
1931 {
1932 ✗ int i, j, w, h, idx = 0;
1933 int block_mean, rice_parameter, rice_prefix_code, rice_suffix_code,
1934 dpcm_residual, left, top, topleft, min_left_top, max_left_top, p, p2, output;
1935 ✗ h = 16 >> (n ? s->chroma_y_shift : 0);
1936 ✗ w = 16 >> (n ? s->chroma_x_shift : 0);
1937
1938 ✗ block_mean = get_bits(&s->gb, s->avctx->bits_per_raw_sample);
1939 ✗ if (block_mean == 0){
1940 ✗ av_log(s->avctx, AV_LOG_ERROR, "Forbidden block_mean\n");
1941 ✗ return AVERROR_INVALIDDATA;
1942 }
1943 ✗ s->last_dc[n] = block_mean * (1 << (s->dct_precision + s->intra_dc_precision));
1944
1945 ✗ rice_parameter = get_bits(&s->gb, 4);
1946 ✗ if (rice_parameter == 0) {
1947 ✗ av_log(s->avctx, AV_LOG_ERROR, "Forbidden rice_parameter\n");
1948 ✗ return AVERROR_INVALIDDATA;
1949 }
1950
1951 ✗ if (rice_parameter == 15)
1952 ✗ rice_parameter = 0;
1953
1954 ✗ if (rice_parameter > 11) {
1955 ✗ av_log(s->avctx, AV_LOG_ERROR, "Forbidden rice_parameter\n");
1956 ✗ return AVERROR_INVALIDDATA;
1957 }
1958
1959 ✗ for (i = 0; i < h; i++) {
1960 ✗ output = 1 << (s->avctx->bits_per_raw_sample - 1);
1961 ✗ top = 1 << (s->avctx->bits_per_raw_sample - 1);
1962
1963 ✗ for (j = 0; j < w; j++) {
1964 ✗ left = output;
1965 ✗ topleft = top;
1966
1967 ✗ rice_prefix_code = get_unary(&s->gb, 1, 12);
1968
1969 /* Escape */
1970 ✗ if (rice_prefix_code == 11)
1971 ✗ dpcm_residual = get_bits(&s->gb, s->avctx->bits_per_raw_sample);
1972 else {
1973 ✗ if (rice_prefix_code == 12) {
1974 ✗ av_log(s->avctx, AV_LOG_ERROR, "Forbidden rice_prefix_code\n");
1975 ✗ return AVERROR_INVALIDDATA;
1976 }
1977 ✗ rice_suffix_code = get_bitsz(&s->gb, rice_parameter);
1978 ✗ dpcm_residual = (rice_prefix_code << rice_parameter) + rice_suffix_code;
1979 }
1980
1981 /* Map to a signed residual */
1982 ✗ if (dpcm_residual & 1)
1983 ✗ dpcm_residual = (-1 * dpcm_residual) >> 1;
1984 else
1985 ✗ dpcm_residual = (dpcm_residual >> 1);
1986
1987 ✗ if (i != 0)
1988 ✗ top = macroblock[idx-w];
1989
1990 ✗ p = left + top - topleft;
1991 ✗ min_left_top = FFMIN(left, top);
1992 ✗ if (p < min_left_top)
1993 ✗ p = min_left_top;
1994
1995 ✗ max_left_top = FFMAX(left, top);
1996 ✗ if (p > max_left_top)
1997 ✗ p = max_left_top;
1998
1999 ✗ p2 = (FFMIN(min_left_top, topleft) + FFMAX(max_left_top, topleft)) >> 1;
2000 ✗ if (p2 == p)
2001 ✗ p2 = block_mean;
2002
2003 ✗ if (p2 > p)
2004 ✗ dpcm_residual *= -1;
2005
2006 ✗ macroblock[idx++] = output = (dpcm_residual + p) & ((1 << s->avctx->bits_per_raw_sample) - 1);
2007 }
2008 }
2009
2010 ✗ return 0;
2011 }
2012
2013 ✗ static int mpeg4_decode_studio_mb(MpegEncContext *s, int16_t block_[12][64])
2014 {
2015 int i;
2016
2017 ✗ s->dpcm_direction = 0;
2018
2019 /* StudioMacroblock */
2020 /* Assumes I-VOP */
2021 ✗ s->mb_intra = 1;
2022 ✗ if (get_bits1(&s->gb)) { /* compression_mode */
2023 /* DCT */
2024 /* macroblock_type, 1 or 2-bit VLC */
2025 ✗ if (!get_bits1(&s->gb)) {
2026 ✗ skip_bits1(&s->gb);
2027 ✗ s->qscale = mpeg_get_qscale(s);
2028 }
2029
2030 ✗ for (i = 0; i < mpeg4_block_count[s->chroma_format]; i++) {
2031 ✗ if (mpeg4_decode_studio_block(s, (*s->block32)[i], i) < 0)
2032 ✗ return AVERROR_INVALIDDATA;
2033 }
2034 } else {
2035 /* DPCM */
2036 ✗ check_marker(s->avctx, &s->gb, "DPCM block start");
2037 ✗ s->dpcm_direction = get_bits1(&s->gb) ? -1 : 1;
2038 ✗ for (i = 0; i < 3; i++) {
2039 ✗ if (mpeg4_decode_dpcm_macroblock(s, (*s->dpcm_macroblock)[i], i) < 0)
2040 ✗ return AVERROR_INVALIDDATA;
2041 }
2042 }
2043
2044 ✗ if (get_bits_left(&s->gb) >= 24 && show_bits(&s->gb, 23) == 0) {
2045 ✗ next_start_code_studio(&s->gb);
2046 ✗ return SLICE_END;
2047 }
2048
2049 //vcon-stp9L1.bits (first frame)
2050 ✗ if (get_bits_left(&s->gb) == 0)
2051 ✗ return SLICE_END;
2052
2053 //vcon-stp2L1.bits, vcon-stp3L1.bits, vcon-stp6L1.bits, vcon-stp7L1.bits, vcon-stp8L1.bits, vcon-stp10L1.bits (first frame)
2054 ✗ if (get_bits_left(&s->gb) < 8U && show_bits(&s->gb, get_bits_left(&s->gb)) == 0)
2055 ✗ return SLICE_END;
2056
2057 ✗ return SLICE_OK;
2058 }
2059
2060 955 static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
2061 {
2062 int hours, minutes, seconds;
2063
2064
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 955 times.
 955 if (!show_bits(gb, 23)) {
2065 ✗ av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n");
2066 ✗ return AVERROR_INVALIDDATA;
2067 }
2068
2069 955 hours = get_bits(gb, 5);
2070 955 minutes = get_bits(gb, 6);
2071 955 check_marker(s->avctx, gb, "in gop_header");
2072 955 seconds = get_bits(gb, 6);
2073
2074 955 s->time_base = seconds + 60*(minutes + 60*hours);
2075
2076 955 skip_bits1(gb);
2077 955 skip_bits1(gb);
2078
2079 955 return 0;
2080 }
2081
2082 1218 static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb, int *profile, int *level)
2083 {
2084
2085 1218 *profile = get_bits(gb, 4);
2086 1218 *level = get_bits(gb, 4);
2087
2088 // for Simple profile, level 0
2089
3/4
✓ Branch 0 taken 693 times.
✓ Branch 1 taken 525 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 693 times.
 1218 if (*profile == 0 && *level == 8) {
2090 ✗ *level = 0;
2091 }
2092
2093 1218 return 0;
2094 }
2095
2096 1218 static int mpeg4_decode_visual_object(MpegEncContext *s, GetBitContext *gb)
2097 {
2098 int visual_object_type;
2099 1218 int is_visual_object_identifier = get_bits1(gb);
2100
2101
2/2
✓ Branch 0 taken 1184 times.
✓ Branch 1 taken 34 times.
 1218 if (is_visual_object_identifier) {
2102 1184 skip_bits(gb, 4+3);
2103 }
2104 1218 visual_object_type = get_bits(gb, 4);
2105
2106
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 1218 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 1218 if (visual_object_type == VOT_VIDEO_ID ||
2107 visual_object_type == VOT_STILL_TEXTURE_ID) {
2108 1218 int video_signal_type = get_bits1(gb);
2109
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1218 times.
 1218 if (video_signal_type) {
2110 int video_range, color_description;
2111 ✗ skip_bits(gb, 3); // video_format
2112 ✗ video_range = get_bits1(gb);
2113 ✗ color_description = get_bits1(gb);
2114
2115 ✗ s->avctx->color_range = video_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
2116
2117 ✗ if (color_description) {
2118 ✗ s->avctx->color_primaries = get_bits(gb, 8);
2119 ✗ s->avctx->color_trc = get_bits(gb, 8);
2120 ✗ s->avctx->colorspace = get_bits(gb, 8);
2121 }
2122 }
2123 }
2124
2125 1218 return 0;
2126 }
2127
2128 23 static void mpeg4_load_default_matrices(MpegEncContext *s)
2129 {
2130 int i, v;
2131
2132 /* load default matrices */
2133
2/2
✓ Branch 0 taken 1472 times.
✓ Branch 1 taken 23 times.
 1495 for (i = 0; i < 64; i++) {
2134 1472 int j = s->idsp.idct_permutation[i];
2135 1472 v = ff_mpeg4_default_intra_matrix[i];
2136 1472 s->intra_matrix[j] = v;
2137 1472 s->chroma_intra_matrix[j] = v;
2138
2139 1472 v = ff_mpeg4_default_non_intra_matrix[i];
2140 1472 s->inter_matrix[j] = v;
2141 1472 s->chroma_inter_matrix[j] = v;
2142 }
2143 23 }
2144
2145 ✗ static int read_quant_matrix_ext(MpegEncContext *s, GetBitContext *gb)
2146 {
2147 int i, j, v;
2148
2149 ✗ if (get_bits1(gb)) {
2150 ✗ if (get_bits_left(gb) < 64*8)
2151 ✗ return AVERROR_INVALIDDATA;
2152 /* intra_quantiser_matrix */
2153 ✗ for (i = 0; i < 64; i++) {
2154 ✗ v = get_bits(gb, 8);
2155 ✗ j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2156 ✗ s->intra_matrix[j] = v;
2157 ✗ s->chroma_intra_matrix[j] = v;
2158 }
2159 }
2160
2161 ✗ if (get_bits1(gb)) {
2162 ✗ if (get_bits_left(gb) < 64*8)
2163 ✗ return AVERROR_INVALIDDATA;
2164 /* non_intra_quantiser_matrix */
2165 ✗ for (i = 0; i < 64; i++) {
2166 ✗ get_bits(gb, 8);
2167 }
2168 }
2169
2170 ✗ if (get_bits1(gb)) {
2171 ✗ if (get_bits_left(gb) < 64*8)
2172 ✗ return AVERROR_INVALIDDATA;
2173 /* chroma_intra_quantiser_matrix */
2174 ✗ for (i = 0; i < 64; i++) {
2175 ✗ v = get_bits(gb, 8);
2176 ✗ j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2177 ✗ s->chroma_intra_matrix[j] = v;
2178 }
2179 }
2180
2181 ✗ if (get_bits1(gb)) {
2182 ✗ if (get_bits_left(gb) < 64*8)
2183 ✗ return AVERROR_INVALIDDATA;
2184 /* chroma_non_intra_quantiser_matrix */
2185 ✗ for (i = 0; i < 64; i++) {
2186 ✗ get_bits(gb, 8);
2187 }
2188 }
2189
2190 ✗ next_start_code_studio(gb);
2191 ✗ return 0;
2192 }
2193
2194 ✗ static void extension_and_user_data(MpegEncContext *s, GetBitContext *gb, int id)
2195 {
2196 uint32_t startcode;
2197 uint8_t extension_type;
2198
2199 ✗ startcode = show_bits_long(gb, 32);
2200 ✗ if (startcode == USER_DATA_STARTCODE || startcode == EXT_STARTCODE) {
2201
2202 ✗ if ((id == 2 || id == 4) && startcode == EXT_STARTCODE) {
2203 ✗ skip_bits_long(gb, 32);
2204 ✗ extension_type = get_bits(gb, 4);
2205 ✗ if (extension_type == QUANT_MATRIX_EXT_ID)
2206 ✗ read_quant_matrix_ext(s, gb);
2207 }
2208 }
2209 }
2210
2211 ✗ static int decode_studio_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2212 {
2213 ✗ MpegEncContext *s = &ctx->m;
2214 int width, height;
2215 int bits_per_raw_sample;
2216 int rgb, chroma_format;
2217
2218 // random_accessible_vol and video_object_type_indication have already
2219 // been read by the caller decode_vol_header()
2220 ✗ skip_bits(gb, 4); /* video_object_layer_verid */
2221 ✗ ctx->shape = get_bits(gb, 2); /* video_object_layer_shape */
2222 ✗ skip_bits(gb, 4); /* video_object_layer_shape_extension */
2223 ✗ skip_bits1(gb); /* progressive_sequence */
2224 ✗ if (ctx->shape != RECT_SHAPE) {
2225 ✗ avpriv_request_sample(s->avctx, "MPEG-4 Studio profile non rectangular shape");
2226 ✗ return AVERROR_PATCHWELCOME;
2227 }
2228 ✗ if (ctx->shape != BIN_ONLY_SHAPE) {
2229 ✗ rgb = get_bits1(gb); /* rgb_components */
2230 ✗ chroma_format = get_bits(gb, 2); /* chroma_format */
2231 ✗ if (!chroma_format || chroma_format == CHROMA_420 || (rgb && chroma_format == CHROMA_422)) {
2232 ✗ av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n");
2233 ✗ return AVERROR_INVALIDDATA;
2234 }
2235
2236 ✗ bits_per_raw_sample = get_bits(gb, 4); /* bit_depth */
2237 ✗ if (bits_per_raw_sample == 10) {
2238 ✗ if (rgb) {
2239 ✗ s->avctx->pix_fmt = AV_PIX_FMT_GBRP10;
2240 } else {
2241 ✗ s->avctx->pix_fmt = chroma_format == CHROMA_422 ? AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV444P10;
2242 }
2243 } else {
2244 ✗ avpriv_request_sample(s->avctx, "MPEG-4 Studio profile bit-depth %u", bits_per_raw_sample);
2245 ✗ return AVERROR_PATCHWELCOME;
2246 }
2247 ✗ if (rgb != ctx->rgb || s->chroma_format != chroma_format)
2248 ✗ s->context_reinit = 1;
2249 ✗ s->avctx->bits_per_raw_sample = bits_per_raw_sample;
2250 ✗ ctx->rgb = rgb;
2251 ✗ s->chroma_format = chroma_format;
2252 }
2253 ✗ if (ctx->shape == RECT_SHAPE) {
2254 ✗ check_marker(s->avctx, gb, "before video_object_layer_width");
2255 ✗ width = get_bits(gb, 14); /* video_object_layer_width */
2256 ✗ check_marker(s->avctx, gb, "before video_object_layer_height");
2257 ✗ height = get_bits(gb, 14); /* video_object_layer_height */
2258 ✗ check_marker(s->avctx, gb, "after video_object_layer_height");
2259
2260 /* Do the same check as non-studio profile */
2261 ✗ if (width && height) {
2262 ✗ if (s->width && s->height &&
2263 ✗ (s->width != width || s->height != height))
2264 ✗ s->context_reinit = 1;
2265 ✗ s->width = width;
2266 ✗ s->height = height;
2267 }
2268 }
2269 ✗ s->aspect_ratio_info = get_bits(gb, 4);
2270 ✗ if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
2271 ✗ s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width
2272 ✗ s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height
2273 } else {
2274 ✗ s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info];
2275 }
2276 ✗ skip_bits(gb, 4); /* frame_rate_code */
2277 ✗ skip_bits(gb, 15); /* first_half_bit_rate */
2278 ✗ check_marker(s->avctx, gb, "after first_half_bit_rate");
2279 ✗ skip_bits(gb, 15); /* latter_half_bit_rate */
2280 ✗ check_marker(s->avctx, gb, "after latter_half_bit_rate");
2281 ✗ skip_bits(gb, 15); /* first_half_vbv_buffer_size */
2282 ✗ check_marker(s->avctx, gb, "after first_half_vbv_buffer_size");
2283 ✗ skip_bits(gb, 3); /* latter_half_vbv_buffer_size */
2284 ✗ skip_bits(gb, 11); /* first_half_vbv_buffer_size */
2285 ✗ check_marker(s->avctx, gb, "after first_half_vbv_buffer_size");
2286 ✗ skip_bits(gb, 15); /* latter_half_vbv_occupancy */
2287 ✗ check_marker(s->avctx, gb, "after latter_half_vbv_occupancy");
2288 ✗ s->low_delay = get_bits1(gb);
2289 ✗ s->mpeg_quant = get_bits1(gb); /* mpeg2_stream */
2290
2291 ✗ next_start_code_studio(gb);
2292 ✗ extension_and_user_data(s, gb, 2);
2293
2294 ✗ return 0;
2295 }
2296
2297 1250 static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2298 {
2299 1250 MpegEncContext *s = &ctx->m;
2300 int width, height, vo_ver_id;
2301
2302 /* vol header */
2303 1250 skip_bits(gb, 1); /* random access */
2304 1250 s->vo_type = get_bits(gb, 8);
2305
2306 /* If we are in studio profile (per vo_type), check if its all consistent
2307 * and if so continue pass control to decode_studio_vol_header().
2308 * elIf something is inconsistent, error out
2309 * else continue with (non studio) vol header decpoding.
2310 */
2311
1/2
✓ Branch 0 taken 1250 times.
✗ Branch 1 not taken.
 1250 if (s->vo_type == CORE_STUDIO_VO_TYPE ||
2312
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 s->vo_type == SIMPLE_STUDIO_VO_TYPE) {
2313 ✗ if (s->avctx->profile != FF_PROFILE_UNKNOWN && s->avctx->profile != FF_PROFILE_MPEG4_SIMPLE_STUDIO)
2314 ✗ return AVERROR_INVALIDDATA;
2315 ✗ s->studio_profile = 1;
2316 ✗ s->avctx->profile = FF_PROFILE_MPEG4_SIMPLE_STUDIO;
2317 ✗ return decode_studio_vol_header(ctx, gb);
2318
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 } else if (s->studio_profile) {
2319 ✗ return AVERROR_PATCHWELCOME;
2320 }
2321
2322
2/2
✓ Branch 1 taken 1214 times.
✓ Branch 2 taken 36 times.
 1250 if (get_bits1(gb) != 0) { /* is_ol_id */
2323 1214 vo_ver_id = get_bits(gb, 4); /* vo_ver_id */
2324 1214 skip_bits(gb, 3); /* vo_priority */
2325 } else {
2326 36 vo_ver_id = 1;
2327 }
2328 1250 s->aspect_ratio_info = get_bits(gb, 4);
2329
2/2
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 1249 times.
 1250 if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
2330 1 s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width
2331 1 s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height
2332 } else {
2333 1249 s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info];
2334 }
2335
2336
2/2
✓ Branch 1 taken 1210 times.
✓ Branch 2 taken 40 times.
 1250 if ((ctx->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */
2337 1210 int chroma_format = get_bits(gb, 2);
2338
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1210 times.
 1210 if (chroma_format != CHROMA_420)
2339 ✗ av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n");
2340
2341 1210 s->low_delay = get_bits1(gb);
2342
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1210 times.
 1210 if (get_bits1(gb)) { /* vbv parameters */
2343 ✗ get_bits(gb, 15); /* first_half_bitrate */
2344 ✗ check_marker(s->avctx, gb, "after first_half_bitrate");
2345 ✗ get_bits(gb, 15); /* latter_half_bitrate */
2346 ✗ check_marker(s->avctx, gb, "after latter_half_bitrate");
2347 ✗ get_bits(gb, 15); /* first_half_vbv_buffer_size */
2348 ✗ check_marker(s->avctx, gb, "after first_half_vbv_buffer_size");
2349 ✗ get_bits(gb, 3); /* latter_half_vbv_buffer_size */
2350 ✗ get_bits(gb, 11); /* first_half_vbv_occupancy */
2351 ✗ check_marker(s->avctx, gb, "after first_half_vbv_occupancy");
2352 ✗ get_bits(gb, 15); /* latter_half_vbv_occupancy */
2353 ✗ check_marker(s->avctx, gb, "after latter_half_vbv_occupancy");
2354 }
2355 } else {
2356 /* is setting low delay flag only once the smartest thing to do?
2357 * low delay detection will not be overridden. */
2358
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 29 times.
 40 if (s->picture_number == 0) {
2359
2/2
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 5 times.
 11 switch(s->vo_type) {
2360 6 case SIMPLE_VO_TYPE:
2361 case ADV_SIMPLE_VO_TYPE:
2362 6 s->low_delay = 1;
2363 6 break;
2364 5 default:
2365 5 s->low_delay = 0;
2366 }
2367 }
2368 }
2369
2370 1250 ctx->shape = get_bits(gb, 2); /* vol shape */
2371
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (ctx->shape != RECT_SHAPE)
2372 ✗ av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n");
2373
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 1250 if (ctx->shape == GRAY_SHAPE && vo_ver_id != 1) {
2374 ✗ av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n");
2375 ✗ skip_bits(gb, 4); /* video_object_layer_shape_extension */
2376 }
2377
2378 1250 check_marker(s->avctx, gb, "before time_increment_resolution");
2379
2380 1250 s->avctx->framerate.num = get_bits(gb, 16);
2381
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (!s->avctx->framerate.num) {
2382 ✗ av_log(s->avctx, AV_LOG_ERROR, "framerate==0\n");
2383 ✗ return AVERROR_INVALIDDATA;
2384 }
2385
2386 1250 ctx->time_increment_bits = av_log2(s->avctx->framerate.num - 1) + 1;
2387
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (ctx->time_increment_bits < 1)
2388 ✗ ctx->time_increment_bits = 1;
2389
2390 1250 check_marker(s->avctx, gb, "before fixed_vop_rate");
2391
2392
2/2
✓ Branch 1 taken 26 times.
✓ Branch 2 taken 1224 times.
 1250 if (get_bits1(gb) != 0) /* fixed_vop_rate */
2393 26 s->avctx->framerate.den = get_bits(gb, ctx->time_increment_bits);
2394 else
2395 1224 s->avctx->framerate.den = 1;
2396
2397 1250 s->avctx->time_base = av_inv_q(av_mul_q(s->avctx->framerate, (AVRational){s->avctx->ticks_per_frame, 1}));
2398
2399 1250 ctx->t_frame = 0;
2400
2401
1/2
✓ Branch 0 taken 1250 times.
✗ Branch 1 not taken.
 1250 if (ctx->shape != BIN_ONLY_SHAPE) {
2402
1/2
✓ Branch 0 taken 1250 times.
✗ Branch 1 not taken.
 1250 if (ctx->shape == RECT_SHAPE) {
2403 1250 check_marker(s->avctx, gb, "before width");
2404 1250 width = get_bits(gb, 13);
2405 1250 check_marker(s->avctx, gb, "before height");
2406 1250 height = get_bits(gb, 13);
2407 1250 check_marker(s->avctx, gb, "after height");
2408
2/4
✓ Branch 0 taken 1250 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
✗ Branch 3 not taken.
 1250 if (width && height && /* they should be non zero but who knows */
2409
3/4
✓ Branch 0 taken 914 times.
✓ Branch 1 taken 336 times.
✓ Branch 2 taken 914 times.
✗ Branch 3 not taken.
 1250 !(s->width && s->codec_tag == AV_RL32("MP4S"))) {
2410
3/4
✓ Branch 0 taken 914 times.
✓ Branch 1 taken 336 times.
✓ Branch 2 taken 914 times.
✗ Branch 3 not taken.
 1250 if (s->width && s->height &&
2411
3/4
✓ Branch 0 taken 894 times.
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 894 times.
 914 (s->width != width || s->height != height))
2412 20 s->context_reinit = 1;
2413 1250 s->width = width;
2414 1250 s->height = height;
2415 }
2416 }
2417
2418 1250 s->progressive_sequence =
2419 1250 s->progressive_frame = get_bits1(gb) ^ 1;
2420 1250 s->interlaced_dct = 0;
2421
1/4
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
 1250 if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
2422 ✗ av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */
2423 "MPEG-4 OBMC not supported (very likely buggy encoder)\n");
2424
2/2
✓ Branch 0 taken 745 times.
✓ Branch 1 taken 505 times.
 1250 if (vo_ver_id == 1)
2425 745 ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
2426 else
2427 505 ctx->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */
2428
2429
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (ctx->vol_sprite_usage == STATIC_SPRITE)
2430 ✗ av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n");
2431
1/2
✓ Branch 0 taken 1250 times.
✗ Branch 1 not taken.
 1250 if (ctx->vol_sprite_usage == STATIC_SPRITE ||
2432
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 ctx->vol_sprite_usage == GMC_SPRITE) {
2433 ✗ if (ctx->vol_sprite_usage == STATIC_SPRITE) {
2434 ✗ skip_bits(gb, 13); // sprite_width
2435 ✗ check_marker(s->avctx, gb, "after sprite_width");
2436 ✗ skip_bits(gb, 13); // sprite_height
2437 ✗ check_marker(s->avctx, gb, "after sprite_height");
2438 ✗ skip_bits(gb, 13); // sprite_left
2439 ✗ check_marker(s->avctx, gb, "after sprite_left");
2440 ✗ skip_bits(gb, 13); // sprite_top
2441 ✗ check_marker(s->avctx, gb, "after sprite_top");
2442 }
2443 ✗ ctx->num_sprite_warping_points = get_bits(gb, 6);
2444 ✗ if (ctx->num_sprite_warping_points > 3) {
2445 ✗ av_log(s->avctx, AV_LOG_ERROR,
2446 "%d sprite_warping_points\n",
2447 ctx->num_sprite_warping_points);
2448 ✗ ctx->num_sprite_warping_points = 0;
2449 ✗ return AVERROR_INVALIDDATA;
2450 }
2451 ✗ s->sprite_warping_accuracy = get_bits(gb, 2);
2452 ✗ ctx->sprite_brightness_change = get_bits1(gb);
2453 ✗ if (ctx->vol_sprite_usage == STATIC_SPRITE)
2454 ✗ skip_bits1(gb); // low_latency_sprite
2455 }
2456 // FIXME sadct disable bit if verid!=1 && shape not rect
2457
2458
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
 1250 if (get_bits1(gb) == 1) { /* not_8_bit */
2459 ✗ s->quant_precision = get_bits(gb, 4); /* quant_precision */
2460 ✗ if (get_bits(gb, 4) != 8) /* bits_per_pixel */
2461 ✗ av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n");
2462 ✗ if (s->quant_precision != 5)
2463 ✗ av_log(s->avctx, AV_LOG_ERROR,
2464 "quant precision %d\n", s->quant_precision);
2465 ✗ if (s->quant_precision<3 || s->quant_precision>9) {
2466 ✗ s->quant_precision = 5;
2467 }
2468 } else {
2469 1250 s->quant_precision = 5;
2470 }
2471
2472 // FIXME a bunch of grayscale shape things
2473
2474
2/2
✓ Branch 1 taken 23 times.
✓ Branch 2 taken 1227 times.
 1250 if ((s->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */
2475 int i, v;
2476
2477 23 mpeg4_load_default_matrices(s);
2478
2479 /* load custom intra matrix */
2480
2/2
✓ Branch 1 taken 12 times.
✓ Branch 2 taken 11 times.
 23 if (get_bits1(gb)) {
2481 12 int last = 0;
2482
1/2
✓ Branch 0 taken 360 times.
✗ Branch 1 not taken.
 360 for (i = 0; i < 64; i++) {
2483 int j;
2484
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 360 times.
 360 if (get_bits_left(gb) < 8) {
2485 ✗ av_log(s->avctx, AV_LOG_ERROR, "insufficient data for custom matrix\n");
2486 ✗ return AVERROR_INVALIDDATA;
2487 }
2488 360 v = get_bits(gb, 8);
2489
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 348 times.
 360 if (v == 0)
2490 12 break;
2491
2492 348 last = v;
2493 348 j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2494 348 s->intra_matrix[j] = last;
2495 348 s->chroma_intra_matrix[j] = last;
2496 }
2497
2498 /* replicate last value */
2499
2/2
✓ Branch 0 taken 420 times.
✓ Branch 1 taken 12 times.
 432 for (; i < 64; i++) {
2500 420 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2501 420 s->intra_matrix[j] = last;
2502 420 s->chroma_intra_matrix[j] = last;
2503 }
2504 }
2505
2506 /* load custom non intra matrix */
2507
2/2
✓ Branch 1 taken 12 times.
✓ Branch 2 taken 11 times.
 23 if (get_bits1(gb)) {
2508 12 int last = 0;
2509
1/2
✓ Branch 0 taken 360 times.
✗ Branch 1 not taken.
 360 for (i = 0; i < 64; i++) {
2510 int j;
2511
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 360 times.
 360 if (get_bits_left(gb) < 8) {
2512 ✗ av_log(s->avctx, AV_LOG_ERROR, "insufficient data for custom matrix\n");
2513 ✗ return AVERROR_INVALIDDATA;
2514 }
2515 360 v = get_bits(gb, 8);
2516
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 348 times.
 360 if (v == 0)
2517 12 break;
2518
2519 348 last = v;
2520 348 j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2521 348 s->inter_matrix[j] = v;
2522 348 s->chroma_inter_matrix[j] = v;
2523 }
2524
2525 /* replicate last value */
2526
2/2
✓ Branch 0 taken 420 times.
✓ Branch 1 taken 12 times.
 432 for (; i < 64; i++) {
2527 420 int j = s->idsp.idct_permutation[ff_zigzag_direct[i]];
2528 420 s->inter_matrix[j] = last;
2529 420 s->chroma_inter_matrix[j] = last;
2530 }
2531 }
2532
2533 // FIXME a bunch of grayscale shape things
2534 }
2535
2536
2/2
✓ Branch 0 taken 505 times.
✓ Branch 1 taken 745 times.
 1250 if (vo_ver_id != 1)
2537 505 s->quarter_sample = get_bits1(gb);
2538 else
2539 745 s->quarter_sample = 0;
2540
2541
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
 1250 if (get_bits_left(gb) < 4) {
2542 ✗ av_log(s->avctx, AV_LOG_ERROR, "VOL Header truncated\n");
2543 ✗ return AVERROR_INVALIDDATA;
2544 }
2545
2546
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
 1250 if (!get_bits1(gb)) {
2547 ✗ int pos = get_bits_count(gb);
2548 ✗ int estimation_method = get_bits(gb, 2);
2549 ✗ if (estimation_method < 2) {
2550 ✗ if (!get_bits1(gb)) {
2551 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */
2552 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */
2553 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */
2554 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */
2555 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */
2556 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upsampling */
2557 }
2558 ✗ if (!get_bits1(gb)) {
2559 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */
2560 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */
2561 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */
2562 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */
2563 }
2564 ✗ if (!check_marker(s->avctx, gb, "in complexity estimation part 1")) {
2565 ✗ skip_bits_long(gb, pos - get_bits_count(gb));
2566 ✗ goto no_cplx_est;
2567 }
2568 ✗ if (!get_bits1(gb)) {
2569 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */
2570 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */
2571 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */
2572 ✗ ctx->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */
2573 }
2574 ✗ if (!get_bits1(gb)) {
2575 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */
2576 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */
2577 ✗ ctx->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */
2578 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */
2579 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */
2580 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */
2581 }
2582 ✗ if (!check_marker(s->avctx, gb, "in complexity estimation part 2")) {
2583 ✗ skip_bits_long(gb, pos - get_bits_count(gb));
2584 ✗ goto no_cplx_est;
2585 }
2586 ✗ if (estimation_method == 1) {
2587 ✗ ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */
2588 ✗ ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */
2589 }
2590 } else
2591 ✗ av_log(s->avctx, AV_LOG_ERROR,
2592 "Invalid Complexity estimation method %d\n",
2593 estimation_method);
2594 } else {
2595
2596 1250 no_cplx_est:
2597 1250 ctx->cplx_estimation_trash_i =
2598 1250 ctx->cplx_estimation_trash_p =
2599 1250 ctx->cplx_estimation_trash_b = 0;
2600 }
2601
2602 1250 ctx->resync_marker = !get_bits1(gb); /* resync_marker_disabled */
2603
2604 1250 s->data_partitioning = get_bits1(gb);
2605
2/2
✓ Branch 0 taken 288 times.
✓ Branch 1 taken 962 times.
 1250 if (s->data_partitioning)
2606 288 ctx->rvlc = get_bits1(gb);
2607
2608
2/2
✓ Branch 0 taken 505 times.
✓ Branch 1 taken 745 times.
 1250 if (vo_ver_id != 1) {
2609 505 ctx->new_pred = get_bits1(gb);
2610
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 505 times.
 505 if (ctx->new_pred) {
2611 ✗ av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n");
2612 ✗ skip_bits(gb, 2); /* requested upstream message type */
2613 ✗ skip_bits1(gb); /* newpred segment type */
2614 }
2615
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 505 times.
 505 if (get_bits1(gb)) // reduced_res_vop
2616 ✗ av_log(s->avctx, AV_LOG_ERROR,
2617 "reduced resolution VOP not supported\n");
2618 } else {
2619 745 ctx->new_pred = 0;
2620 }
2621
2622 1250 ctx->scalability = get_bits1(gb);
2623
2624
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (ctx->scalability) {
2625 ✗ GetBitContext bak = *gb;
2626 int h_sampling_factor_n;
2627 int h_sampling_factor_m;
2628 int v_sampling_factor_n;
2629 int v_sampling_factor_m;
2630
2631 ✗ skip_bits1(gb); // hierarchy_type
2632 ✗ skip_bits(gb, 4); /* ref_layer_id */
2633 ✗ skip_bits1(gb); /* ref_layer_sampling_dir */
2634 ✗ h_sampling_factor_n = get_bits(gb, 5);
2635 ✗ h_sampling_factor_m = get_bits(gb, 5);
2636 ✗ v_sampling_factor_n = get_bits(gb, 5);
2637 ✗ v_sampling_factor_m = get_bits(gb, 5);
2638 ✗ ctx->enhancement_type = get_bits1(gb);
2639
2640 ✗ if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 ||
2641 ✗ v_sampling_factor_n == 0 || v_sampling_factor_m == 0) {
2642 /* illegal scalability header (VERY broken encoder),
2643 * trying to workaround */
2644 ✗ ctx->scalability = 0;
2645 ✗ *gb = bak;
2646 } else
2647 ✗ av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n");
2648
2649 // bin shape stuff FIXME
2650 }
2651 }
2652
2653
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (s->avctx->debug&FF_DEBUG_PICT_INFO) {
2654 ✗ av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, low_delay:%d %s%s%s%s\n",
2655 ✗ s->avctx->framerate.den, s->avctx->framerate.num,
2656 ctx->time_increment_bits,
2657 s->quant_precision,
2658 s->progressive_sequence,
2659 s->low_delay,
2660 ✗ ctx->scalability ? "scalability " :"" , s->quarter_sample ? "qpel " : "",
2661 ✗ s->data_partitioning ? "partition " : "", ctx->rvlc ? "rvlc " : ""
2662 );
2663 }
2664
2665 1250 return 0;
2666 }
2667
2668 /**
2669 * Decode the user data stuff in the header.
2670 * Also initializes divx/xvid/lavc_version/build.
2671 */
2672 76 static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb)
2673 {
2674 76 MpegEncContext *s = &ctx->m;
2675 char buf[256];
2676 int i;
2677 int e;
2678 76 int ver = 0, build = 0, ver2 = 0, ver3 = 0;
2679 char last;
2680
2681
3/4
✓ Branch 0 taken 747 times.
✗ Branch 1 not taken.
✓ Branch 3 taken 730 times.
✓ Branch 4 taken 17 times.
 747 for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) {
2682
2/2
✓ Branch 1 taken 59 times.
✓ Branch 2 taken 671 times.
 730 if (show_bits(gb, 23) == 0)
2683 59 break;
2684 671 buf[i] = get_bits(gb, 8);
2685 }
2686 76 buf[i] = 0;
2687
2688 /* divx detection */
2689 76 e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last);
2690
1/2
✓ Branch 0 taken 76 times.
✗ Branch 1 not taken.
 76 if (e < 2)
2691 76 e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
2692
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 65 times.
 76 if (e >= 2) {
2693 11 ctx->divx_version = ver;
2694 11 ctx->divx_build = build;
2695
2/4
✓ Branch 0 taken 11 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 11 times.
✗ Branch 3 not taken.
 11 s->divx_packed = e == 3 && last == 'p';
2696 }
2697
2698 /* libavcodec detection */
2699 76 e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3;
2700
1/2
✓ Branch 0 taken 76 times.
✗ Branch 1 not taken.
 76 if (e != 4)
2701 76 e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
2702
1/2
✓ Branch 0 taken 76 times.
✗ Branch 1 not taken.
 76 if (e != 4) {
2703 76 e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1;
2704
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 65 times.
 76 if (e > 1) {
2705
3/6
✓ Branch 0 taken 11 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 11 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 11 times.
 11 if (ver > 0xFFU || ver2 > 0xFFU || ver3 > 0xFFU) {
2706 ✗ av_log(s->avctx, AV_LOG_WARNING,
2707 "Unknown Lavc version string encountered, %d.%d.%d; "
2708 "clamping sub-version values to 8-bits.\n",
2709 ver, ver2, ver3);
2710 }
2711 11 build = ((ver & 0xFF) << 16) + ((ver2 & 0xFF) << 8) + (ver3 & 0xFF);
2712 }
2713 }
2714
2/2
✓ Branch 0 taken 65 times.
✓ Branch 1 taken 11 times.
 76 if (e != 4) {
2715
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 65 times.
 65 if (strcmp(buf, "ffmpeg") == 0)
2716 ✗ ctx->lavc_build = 4600;
2717 }
2718
2/2
✓ Branch 0 taken 11 times.
✓ Branch 1 taken 65 times.
 76 if (e == 4)
2719 11 ctx->lavc_build = build;
2720
2721 /* Xvid detection */
2722 76 e = sscanf(buf, "XviD%d", &build);
2723
2/2
✓ Branch 0 taken 26 times.
✓ Branch 1 taken 50 times.
 76 if (e == 1)
2724 26 ctx->xvid_build = build;
2725
2726 76 return 0;
2727 }
2728
2729 3474 int ff_mpeg4_workaround_bugs(AVCodecContext *avctx)
2730 {
2731 3474 Mpeg4DecContext *ctx = avctx->priv_data;
2732 3474 MpegEncContext *s = &ctx->m;
2733
2734
5/6
✓ Branch 0 taken 3410 times.
✓ Branch 1 taken 64 times.
✓ Branch 2 taken 3410 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 3323 times.
✓ Branch 5 taken 87 times.
 3474 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
2735
1/2
✓ Branch 0 taken 3323 times.
✗ Branch 1 not taken.
 3323 if (s->codec_tag == AV_RL32("XVID") ||
2736
1/2
✓ Branch 0 taken 3323 times.
✗ Branch 1 not taken.
 3323 s->codec_tag == AV_RL32("XVIX") ||
2737
1/2
✓ Branch 0 taken 3323 times.
✗ Branch 1 not taken.
 3323 s->codec_tag == AV_RL32("RMP4") ||
2738
1/2
✓ Branch 0 taken 3323 times.
✗ Branch 1 not taken.
 3323 s->codec_tag == AV_RL32("ZMP4") ||
2739
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3323 times.
 3323 s->codec_tag == AV_RL32("SIPP"))
2740 ✗ ctx->xvid_build = 0;
2741 }
2742
2743
5/6
✓ Branch 0 taken 3410 times.
✓ Branch 1 taken 64 times.
✓ Branch 2 taken 3410 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 3323 times.
✓ Branch 5 taken 87 times.
 3474 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
2744
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 3323 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 3323 if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
2745 ✗ ctx->vol_control_parameters == 0)
2746 ✗ ctx->divx_version = 400; // divx 4
2747
2748
4/4
✓ Branch 0 taken 64 times.
✓ Branch 1 taken 3410 times.
✓ Branch 2 taken 4 times.
✓ Branch 3 taken 60 times.
 3474 if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) {
2749 4 ctx->divx_version =
2750 4 ctx->divx_build = -1;
2751 }
2752
2753
1/2
✓ Branch 0 taken 3474 times.
✗ Branch 1 not taken.
 3474 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
2754
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (s->codec_tag == AV_RL32("XVIX"))
2755 ✗ s->workaround_bugs |= FF_BUG_XVID_ILACE;
2756
2757
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (s->codec_tag == AV_RL32("UMP4"))
2758 ✗ s->workaround_bugs |= FF_BUG_UMP4;
2759
2760
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 3474 if (ctx->divx_version >= 500 && ctx->divx_build < 1814)
2761 ✗ s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2762
2763
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 3474 if (ctx->divx_version > 502 && ctx->divx_build < 1814)
2764 ✗ s->workaround_bugs |= FF_BUG_QPEL_CHROMA2;
2765
2766
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->xvid_build <= 3U)
2767 ✗ s->padding_bug_score = 256 * 256 * 256 * 64;
2768
2769
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->xvid_build <= 1U)
2770 ✗ s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2771
2772
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->xvid_build <= 12U)
2773 ✗ s->workaround_bugs |= FF_BUG_EDGE;
2774
2775
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->xvid_build <= 32U)
2776 ✗ s->workaround_bugs |= FF_BUG_DC_CLIP;
2777
2778 #define SET_QPEL_FUNC(postfix1, postfix2) \
2779 s->qdsp.put_ ## postfix1 = ff_put_ ## postfix2; \
2780 s->qdsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2; \
2781 s->qdsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
2782
2783
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->lavc_build < 4653U)
2784 ✗ s->workaround_bugs |= FF_BUG_STD_QPEL;
2785
2786
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->lavc_build < 4655U)
2787 ✗ s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2788
2789
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->lavc_build < 4670U)
2790 ✗ s->workaround_bugs |= FF_BUG_EDGE;
2791
2792
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->lavc_build <= 4712U)
2793 ✗ s->workaround_bugs |= FF_BUG_DC_CLIP;
2794
2795
1/2
✓ Branch 0 taken 3474 times.
✗ Branch 1 not taken.
 3474 if ((ctx->lavc_build&0xFF) >= 100) {
2796
3/4
✓ Branch 0 taken 1 times.
✓ Branch 1 taken 3473 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1 times.
 3474 if (ctx->lavc_build > 3621476 && ctx->lavc_build < 3752552 &&
2797 ✗ (ctx->lavc_build < 3752037 || ctx->lavc_build > 3752191) // 3.2.1+
2798 )
2799 ✗ s->workaround_bugs |= FF_BUG_IEDGE;
2800 }
2801
2802
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->divx_version >= 0)
2803 ✗ s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2804
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 3474 if (ctx->divx_version == 501 && ctx->divx_build == 20020416)
2805 ✗ s->padding_bug_score = 256 * 256 * 256 * 64;
2806
2807
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->divx_version < 500U)
2808 ✗ s->workaround_bugs |= FF_BUG_EDGE;
2809
2810
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (ctx->divx_version >= 0)
2811 ✗ s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
2812 }
2813
2814
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (s->workaround_bugs & FF_BUG_STD_QPEL) {
2815 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][5], qpel16_mc11_old_c)
2816 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][7], qpel16_mc31_old_c)
2817 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][9], qpel16_mc12_old_c)
2818 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
2819 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
2820 ✗ SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
2821
2822 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][5], qpel8_mc11_old_c)
2823 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][7], qpel8_mc31_old_c)
2824 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][9], qpel8_mc12_old_c)
2825 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
2826 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
2827 ✗ SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
2828 }
2829
2830
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3474 times.
 3474 if (avctx->debug & FF_DEBUG_BUGS)
2831 ✗ av_log(s->avctx, AV_LOG_DEBUG,
2832 "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
2833 s->workaround_bugs, ctx->lavc_build, ctx->xvid_build,
2834 ✗ ctx->divx_version, ctx->divx_build, s->divx_packed ? "p" : "");
2835
2836
2/2
✓ Branch 0 taken 64 times.
✓ Branch 1 taken 3410 times.
 3474 if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0 &&
2837
1/2
✓ Branch 0 taken 64 times.
✗ Branch 1 not taken.
 64 s->codec_id == AV_CODEC_ID_MPEG4 &&
2838
2/2
✓ Branch 0 taken 4 times.
✓ Branch 1 taken 60 times.
 64 avctx->idct_algo == FF_IDCT_AUTO) {
2839 4 avctx->idct_algo = FF_IDCT_XVID;
2840 4 ff_mpv_idct_init(s);
2841 4 return 1;
2842 }
2843
2844 3470 return 0;
2845 }
2846
2847 6950 static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
2848 {
2849 6950 MpegEncContext *s = &ctx->m;
2850 int time_incr, time_increment;
2851 int64_t pts;
2852
2853 6950 s->mcsel = 0;
2854 6950 s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
2855
3/4
✓ Branch 0 taken 1365 times.
✓ Branch 1 taken 5585 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1365 times.
 6950 if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay &&
2856 ✗ ctx->vol_control_parameters == 0 && !(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)) {
2857 ✗ av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n");
2858 ✗ s->low_delay = 0;
2859 }
2860
2861
4/4
✓ Branch 0 taken 1284 times.
✓ Branch 1 taken 5666 times.
✓ Branch 2 taken 1028 times.
✓ Branch 3 taken 256 times.
 6950 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
2862
2/2
✓ Branch 0 taken 1028 times.
✓ Branch 1 taken 5922 times.
 6950 if (s->partitioned_frame)
2863 1028 s->decode_mb = mpeg4_decode_partitioned_mb;
2864 else
2865 5922 s->decode_mb = mpeg4_decode_mb;
2866
2867 6950 time_incr = 0;
2868
2/2
✓ Branch 1 taken 249 times.
✓ Branch 2 taken 6950 times.
 7199 while (get_bits1(gb) != 0)
2869 249 time_incr++;
2870
2871 6950 check_marker(s->avctx, gb, "before time_increment");
2872
2873
2/2
✓ Branch 0 taken 6948 times.
✓ Branch 1 taken 2 times.
 6950 if (ctx->time_increment_bits == 0 ||
2874
2/2
✓ Branch 1 taken 8 times.
✓ Branch 2 taken 6940 times.
 6948 !(show_bits(gb, ctx->time_increment_bits + 1) & 1)) {
2875 10 av_log(s->avctx, AV_LOG_WARNING,
2876 "time_increment_bits %d is invalid in relation to the current bitstream, this is likely caused by a missing VOL header\n", ctx->time_increment_bits);
2877
2878 10 for (ctx->time_increment_bits = 1;
2879
1/2
✓ Branch 0 taken 110 times.
✗ Branch 1 not taken.
 110 ctx->time_increment_bits < 16;
2880 100 ctx->time_increment_bits++) {
2881
1/2
✓ Branch 0 taken 110 times.
✗ Branch 1 not taken.
 110 if (s->pict_type == AV_PICTURE_TYPE_P ||
2882
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 110 times.
 110 (s->pict_type == AV_PICTURE_TYPE_S &&
2883 ✗ ctx->vol_sprite_usage == GMC_SPRITE)) {
2884 ✗ if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30)
2885 ✗ break;
2886
2/2
✓ Branch 1 taken 10 times.
✓ Branch 2 taken 100 times.
 110 } else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18)
2887 10 break;
2888 }
2889
2890 10 av_log(s->avctx, AV_LOG_WARNING,
2891 "time_increment_bits set to %d bits, based on bitstream analysis\n", ctx->time_increment_bits);
2892
3/4
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 4 times.
✓ Branch 2 taken 6 times.
✗ Branch 3 not taken.
 10 if (s->avctx->framerate.num && 4*s->avctx->framerate.num < 1<<ctx->time_increment_bits) {
2893 6 s->avctx->framerate.num = 1<<ctx->time_increment_bits;
2894 6 s->avctx->time_base = av_inv_q(av_mul_q(s->avctx->framerate, (AVRational){s->avctx->ticks_per_frame, 1}));
2895 }
2896 }
2897
2898 if (IS_3IV1)
2899 time_increment = get_bits1(gb); // FIXME investigate further
2900 else
2901 6950 time_increment = get_bits(gb, ctx->time_increment_bits);
2902
2903
2/2
✓ Branch 0 taken 5585 times.
✓ Branch 1 taken 1365 times.
 6950 if (s->pict_type != AV_PICTURE_TYPE_B) {
2904 5585 s->last_time_base = s->time_base;
2905 5585 s->time_base += time_incr;
2906 5585 s->time = s->time_base * (int64_t)s->avctx->framerate.num + time_increment;
2907
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5585 times.
 5585 if (s->workaround_bugs & FF_BUG_UMP4) {
2908 ✗ if (s->time < s->last_non_b_time) {
2909 /* header is not mpeg-4-compatible, broken encoder,
2910 * trying to workaround */
2911 ✗ s->time_base++;
2912 ✗ s->time += s->avctx->framerate.num;
2913 }
2914 }
2915 5585 s->pp_time = s->time - s->last_non_b_time;
2916 5585 s->last_non_b_time = s->time;
2917 } else {
2918 1365 s->time = (s->last_time_base + time_incr) * (int64_t)s->avctx->framerate.num + time_increment;
2919 1365 s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
2920
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 if (s->pp_time <= s->pb_time ||
2921
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 s->pp_time <= s->pp_time - s->pb_time ||
2922
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1365 times.
 1365 s->pp_time <= 0) {
2923 /* messed up order, maybe after seeking? skipping current B-frame */
2924 ✗ return FRAME_SKIPPED;
2925 }
2926 1365 ff_mpeg4_init_direct_mv(s);
2927
2928
2/2
✓ Branch 0 taken 215 times.
✓ Branch 1 taken 1150 times.
 1365 if (ctx->t_frame == 0)
2929 215 ctx->t_frame = s->pb_time;
2930
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1365 times.
 1365 if (ctx->t_frame == 0)
2931 ✗ ctx->t_frame = 1; // 1/0 protection
2932
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, ctx->t_frame) -
2933
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2934
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 s->pb_field_time = (ROUNDED_DIV(s->time, ctx->t_frame) -
2935
1/2
✓ Branch 0 taken 1365 times.
✗ Branch 1 not taken.
 1365 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2936
3/4
✓ Branch 0 taken 1363 times.
✓ Branch 1 taken 2 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1363 times.
 1365 if (s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) {
2937 2 s->pb_field_time = 2;
2938 2 s->pp_field_time = 4;
2939
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.
 2 if (!s->progressive_sequence)
2940 ✗ return FRAME_SKIPPED;
2941 }
2942 }
2943
2944
1/2
✓ Branch 0 taken 6950 times.
✗ Branch 1 not taken.
 6950 if (s->avctx->framerate.den)
2945
1/2
✓ Branch 0 taken 6950 times.
✗ Branch 1 not taken.
 6950 pts = ROUNDED_DIV(s->time, s->avctx->framerate.den);
2946 else
2947 ✗ pts = AV_NOPTS_VALUE;
2948 ff_dlog(s->avctx, "MPEG4 PTS: %"PRId64"\n", pts);
2949
2950 6950 check_marker(s->avctx, gb, "before vop_coded");
2951
2952 /* vop coded */
2953
2/2
✓ Branch 1 taken 8 times.
✓ Branch 2 taken 6942 times.
 6950 if (get_bits1(gb) != 1) {
2954
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 8 times.
 8 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
2955 ✗ av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
2956 8 return FRAME_SKIPPED;
2957 }
2958
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6942 times.
 6942 if (ctx->new_pred)
2959 ✗ decode_new_pred(ctx, gb);
2960
2961
1/2
✓ Branch 0 taken 6942 times.
✗ Branch 1 not taken.
 6942 if (ctx->shape != BIN_ONLY_SHAPE &&
2962
2/2
✓ Branch 0 taken 2379 times.
✓ Branch 1 taken 4563 times.
 6942 (s->pict_type == AV_PICTURE_TYPE_P ||
2963
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2379 times.
 2379 (s->pict_type == AV_PICTURE_TYPE_S &&
2964 ✗ ctx->vol_sprite_usage == GMC_SPRITE))) {
2965 /* rounding type for motion estimation */
2966 4563 s->no_rounding = get_bits1(gb);
2967 } else {
2968 2379 s->no_rounding = 0;
2969 }
2970 // FIXME reduced res stuff
2971
2972
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6942 times.
 6942 if (ctx->shape != RECT_SHAPE) {
2973 ✗ if (ctx->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) {
2974 ✗ skip_bits(gb, 13); /* width */
2975 ✗ check_marker(s->avctx, gb, "after width");
2976 ✗ skip_bits(gb, 13); /* height */
2977 ✗ check_marker(s->avctx, gb, "after height");
2978 ✗ skip_bits(gb, 13); /* hor_spat_ref */
2979 ✗ check_marker(s->avctx, gb, "after hor_spat_ref");
2980 ✗ skip_bits(gb, 13); /* ver_spat_ref */
2981 }
2982 ✗ skip_bits1(gb); /* change_CR_disable */
2983
2984 ✗ if (get_bits1(gb) != 0)
2985 ✗ skip_bits(gb, 8); /* constant_alpha_value */
2986 }
2987
2988 // FIXME complexity estimation stuff
2989
2990
1/2
✓ Branch 0 taken 6942 times.
✗ Branch 1 not taken.
 6942 if (ctx->shape != BIN_ONLY_SHAPE) {
2991 6942 skip_bits_long(gb, ctx->cplx_estimation_trash_i);
2992
2/2
✓ Branch 0 taken 5928 times.
✓ Branch 1 taken 1014 times.
 6942 if (s->pict_type != AV_PICTURE_TYPE_I)
2993 5928 skip_bits_long(gb, ctx->cplx_estimation_trash_p);
2994
2/2
✓ Branch 0 taken 1365 times.
✓ Branch 1 taken 5577 times.
 6942 if (s->pict_type == AV_PICTURE_TYPE_B)
2995 1365 skip_bits_long(gb, ctx->cplx_estimation_trash_b);
2996
2997
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 6942 times.
 6942 if (get_bits_left(gb) < 3) {
2998 ✗ av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n");
2999 ✗ return AVERROR_INVALIDDATA;
3000 }
3001 6942 ctx->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)];
3002
2/2
✓ Branch 0 taken 50 times.
✓ Branch 1 taken 6892 times.
 6942 if (!s->progressive_sequence) {
3003 50 s->top_field_first = get_bits1(gb);
3004 50 s->alternate_scan = get_bits1(gb);
3005 } else
3006 6892 s->alternate_scan = 0;
3007 }
3008
3009
2/2
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 6936 times.
 6942 if (s->alternate_scan) {
3010 6 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
3011 6 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
3012 6 ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
3013 6 ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
3014 } else {
3015 6936 ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
3016 6936 ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
3017 6936 ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
3018 6936 ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
3019 }
3020
3021
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6942 times.
 6942 if (s->pict_type == AV_PICTURE_TYPE_S) {
3022 ✗ if((ctx->vol_sprite_usage == STATIC_SPRITE ||
3023 ✗ ctx->vol_sprite_usage == GMC_SPRITE)) {
3024 ✗ if (mpeg4_decode_sprite_trajectory(ctx, gb) < 0)
3025 ✗ return AVERROR_INVALIDDATA;
3026 ✗ if (ctx->sprite_brightness_change)
3027 ✗ av_log(s->avctx, AV_LOG_ERROR,
3028 "sprite_brightness_change not supported\n");
3029 ✗ if (ctx->vol_sprite_usage == STATIC_SPRITE)
3030 ✗ av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n");
3031 } else {
3032 ✗ memset(s->sprite_offset, 0, sizeof(s->sprite_offset));
3033 ✗ memset(s->sprite_delta, 0, sizeof(s->sprite_delta));
3034 }
3035 }
3036
3037
1/2
✓ Branch 0 taken 6942 times.
✗ Branch 1 not taken.
 6942 if (ctx->shape != BIN_ONLY_SHAPE) {
3038 6942 s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision);
3039
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6942 times.
 6942 if (s->qscale == 0) {
3040 ✗ av_log(s->avctx, AV_LOG_ERROR,
3041 "Error, header damaged or not MPEG-4 header (qscale=0)\n");
3042 ✗ return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then
3043 }
3044
3045
2/2
✓ Branch 0 taken 5928 times.
✓ Branch 1 taken 1014 times.
 6942 if (s->pict_type != AV_PICTURE_TYPE_I) {
3046 5928 s->f_code = get_bits(gb, 3); /* fcode_for */
3047
2/2
✓ Branch 0 taken 4 times.
✓ Branch 1 taken 5924 times.
 5928 if (s->f_code == 0) {
3048 4 av_log(s->avctx, AV_LOG_ERROR,
3049 "Error, header damaged or not MPEG-4 header (f_code=0)\n");
3050 4 s->f_code = 1;
3051 4 return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then
3052 }
3053 } else
3054 1014 s->f_code = 1;
3055
3056
2/2
✓ Branch 0 taken 1365 times.
✓ Branch 1 taken 5573 times.
 6938 if (s->pict_type == AV_PICTURE_TYPE_B) {
3057 1365 s->b_code = get_bits(gb, 3);
3058
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1365 times.
 1365 if (s->b_code == 0) {
3059 ✗ av_log(s->avctx, AV_LOG_ERROR,
3060 "Error, header damaged or not MPEG4 header (b_code=0)\n");
3061 ✗ s->b_code=1;
3062 ✗ return AVERROR_INVALIDDATA; // makes no sense to continue, as the MV decoding will break very quickly
3063 }
3064 } else
3065 5573 s->b_code = 1;
3066
3067
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6938 times.
 6938 if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
3068 ✗ av_log(s->avctx, AV_LOG_DEBUG,
3069 "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64" tincr:%d\n",
3070 s->qscale, s->f_code, s->b_code,
3071 ✗ s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")),
3072 gb->size_in_bits,s->progressive_sequence, s->alternate_scan,
3073 ✗ s->top_field_first, s->quarter_sample ? "q" : "h",
3074 s->data_partitioning, ctx->resync_marker,
3075 ctx->num_sprite_warping_points, s->sprite_warping_accuracy,
3076 ✗ 1 - s->no_rounding, s->vo_type,
3077 ✗ ctx->vol_control_parameters ? " VOLC" : " ", ctx->intra_dc_threshold,
3078 ctx->cplx_estimation_trash_i, ctx->cplx_estimation_trash_p,
3079 ctx->cplx_estimation_trash_b,
3080 s->time,
3081 time_increment
3082 );
3083 }
3084
3085
1/2
✓ Branch 0 taken 6938 times.
✗ Branch 1 not taken.
 6938 if (!ctx->scalability) {
3086
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 6938 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 6938 if (ctx->shape != RECT_SHAPE && s->pict_type != AV_PICTURE_TYPE_I)
3087 ✗ skip_bits1(gb); // vop shape coding type
3088 } else {
3089 ✗ if (ctx->enhancement_type) {
3090 ✗ int load_backward_shape = get_bits1(gb);
3091 ✗ if (load_backward_shape)
3092 ✗ av_log(s->avctx, AV_LOG_ERROR,
3093 "load backward shape isn't supported\n");
3094 }
3095 ✗ skip_bits(gb, 2); // ref_select_code
3096 }
3097 }
3098 /* detect buggy encoders which don't set the low_delay flag
3099 * (divx4/xvid/opendivx). Note we cannot detect divx5 without B-frames
3100 * easily (although it's buggy too) */
3101
3/4
✓ Branch 0 taken 48 times.
✓ Branch 1 taken 6890 times.
✓ Branch 2 taken 48 times.
✗ Branch 3 not taken.
 6938 if (s->vo_type == 0 && ctx->vol_control_parameters == 0 &&
3102
3/4
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 46 times.
✓ Branch 2 taken 2 times.
✗ Branch 3 not taken.
 48 ctx->divx_version == -1 && s->picture_number == 0) {
3103 2 av_log(s->avctx, AV_LOG_WARNING,
3104 "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
3105 2 s->low_delay = 1;
3106 }
3107
3108 6938 s->picture_number++; // better than pic number==0 always ;)
3109
3110 // FIXME add short header support
3111 6938 s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table;
3112 6938 s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table;
3113
3114
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6938 times.
 6938 if (s->workaround_bugs & FF_BUG_EDGE) {
3115 ✗ s->h_edge_pos = s->width;
3116 ✗ s->v_edge_pos = s->height;
3117 }
3118 6938 return 0;
3119 }
3120
3121 ✗ static void decode_smpte_tc(Mpeg4DecContext *ctx, GetBitContext *gb)
3122 {
3123 ✗ MpegEncContext *s = &ctx->m;
3124
3125 ✗ skip_bits(gb, 16); /* Time_code[63..48] */
3126 ✗ check_marker(s->avctx, gb, "after Time_code[63..48]");
3127 ✗ skip_bits(gb, 16); /* Time_code[47..32] */
3128 ✗ check_marker(s->avctx, gb, "after Time_code[47..32]");
3129 ✗ skip_bits(gb, 16); /* Time_code[31..16] */
3130 ✗ check_marker(s->avctx, gb, "after Time_code[31..16]");
3131 ✗ skip_bits(gb, 16); /* Time_code[15..0] */
3132 ✗ check_marker(s->avctx, gb, "after Time_code[15..0]");
3133 ✗ skip_bits(gb, 4); /* reserved_bits */
3134 }
3135
3136 /**
3137 * Decode the next studio vop header.
3138 * @return <0 if something went wrong
3139 */
3140 ✗ static int decode_studio_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb)
3141 {
3142 ✗ MpegEncContext *s = &ctx->m;
3143
3144 ✗ if (get_bits_left(gb) <= 32)
3145 ✗ return 0;
3146
3147 ✗ s->partitioned_frame = 0;
3148 ✗ s->interlaced_dct = 0;
3149 ✗ s->decode_mb = mpeg4_decode_studio_mb;
3150
3151 ✗ decode_smpte_tc(ctx, gb);
3152
3153 ✗ skip_bits(gb, 10); /* temporal_reference */
3154 ✗ skip_bits(gb, 2); /* vop_structure */
3155 ✗ s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* vop_coding_type */
3156 ✗ if (get_bits1(gb)) { /* vop_coded */
3157 ✗ skip_bits1(gb); /* top_field_first */
3158 ✗ skip_bits1(gb); /* repeat_first_field */
3159 ✗ s->progressive_frame = get_bits1(gb) ^ 1; /* progressive_frame */
3160 }
3161
3162 ✗ if (s->pict_type == AV_PICTURE_TYPE_I) {
3163 ✗ if (get_bits1(gb))
3164 ✗ reset_studio_dc_predictors(s);
3165 }
3166
3167 ✗ if (ctx->shape != BIN_ONLY_SHAPE) {
3168 ✗ s->alternate_scan = get_bits1(gb);
3169 ✗ s->frame_pred_frame_dct = get_bits1(gb);
3170 ✗ s->dct_precision = get_bits(gb, 2);
3171 ✗ s->intra_dc_precision = get_bits(gb, 2);
3172 ✗ s->q_scale_type = get_bits1(gb);
3173 }
3174
3175 ✗ if (s->alternate_scan) {
3176 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan);
3177 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan);
3178 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
3179 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
3180 } else {
3181 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct);
3182 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
3183 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
3184 ✗ ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
3185 }
3186
3187 ✗ mpeg4_load_default_matrices(s);
3188
3189 ✗ next_start_code_studio(gb);
3190 ✗ extension_and_user_data(s, gb, 4);
3191
3192 ✗ return 0;
3193 }
3194
3195 ✗ static int decode_studiovisualobject(Mpeg4DecContext *ctx, GetBitContext *gb)
3196 {
3197 ✗ MpegEncContext *s = &ctx->m;
3198 int visual_object_type;
3199
3200 ✗ skip_bits(gb, 4); /* visual_object_verid */
3201 ✗ visual_object_type = get_bits(gb, 4);
3202 ✗ if (visual_object_type != VOT_VIDEO_ID) {
3203 ✗ avpriv_request_sample(s->avctx, "VO type %u", visual_object_type);
3204 ✗ return AVERROR_PATCHWELCOME;
3205 }
3206
3207 ✗ next_start_code_studio(gb);
3208 ✗ extension_and_user_data(s, gb, 1);
3209
3210 ✗ return 0;
3211 }
3212
3213 /**
3214 * Decode MPEG-4 headers.
3215 *
3216 * @param header If set the absence of a VOP is not treated as error; otherwise, it is treated as such.
3217 * @return <0 if an error occurred
3218 * FRAME_SKIPPED if a not coded VOP is found
3219 * 0 else
3220 */
3221 7444 int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb, int header)
3222 {
3223 7444 MpegEncContext *s = &ctx->m;
3224 unsigned startcode, v;
3225 int ret;
3226 7444 int vol = 0;
3227
3228 /* search next start code */
3229 7444 align_get_bits(gb);
3230
3231 // If we have not switched to studio profile than we also did not switch bps
3232 // that means something else (like a previous instance) outside set bps which
3233 // would be inconsistant with the currect state, thus reset it
3234
2/4
✓ Branch 0 taken 7444 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 7444 times.
✗ Branch 3 not taken.
 7444 if (!s->studio_profile && s->avctx->bits_per_raw_sample != 8)
3235 7444 s->avctx->bits_per_raw_sample = 0;
3236
3237
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 7444 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
 7444 if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) {
3238 ✗ skip_bits(gb, 24);
3239 ✗ if (get_bits(gb, 8) == 0xF0)
3240 ✗ goto end;
3241 }
3242
3243 7444 startcode = 0xff;
3244 for (;;) {
3245
2/2
✓ Branch 1 taken 494 times.
✓ Branch 2 taken 51672 times.
 52166 if (get_bits_count(gb) >= gb->size_in_bits) {
3246
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 494 times.
 494 if (gb->size_in_bits == 8 &&
3247
1/6
✗ Branch 0 not taken.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 494 times.
 494 (ctx->divx_version >= 0 || ctx->xvid_build >= 0) || s->codec_tag == AV_RL32("QMP4")) {
3248 ✗ av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits);
3249 ✗ return FRAME_SKIPPED; // divx bug
3250
3/4
✓ Branch 0 taken 403 times.
✓ Branch 1 taken 91 times.
✓ Branch 3 taken 403 times.
✗ Branch 4 not taken.
 494 } else if (header && get_bits_count(gb) == gb->size_in_bits) {
3251 403 return 0; // ordinary return value for parsing of extradata
3252 } else
3253 91 return AVERROR_INVALIDDATA; // end of stream
3254 }
3255
3256 /* use the bits after the test */
3257 51672 v = get_bits(gb, 8);
3258 51672 startcode = ((startcode << 8) | v) & 0xffffffff;
3259
3260
2/2
✓ Branch 0 taken 38755 times.
✓ Branch 1 taken 12917 times.
 51672 if ((startcode & 0xFFFFFF00) != 0x100)
3261 38755 continue; // no startcode
3262
3263
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12917 times.
 12917 if (s->avctx->debug & FF_DEBUG_STARTCODE) {
3264 ✗ av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode);
3265 ✗ if (startcode <= 0x11F)
3266 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start");
3267 ✗ else if (startcode <= 0x12F)
3268 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start");
3269 ✗ else if (startcode <= 0x13F)
3270 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
3271 ✗ else if (startcode <= 0x15F)
3272 ✗ av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start");
3273 ✗ else if (startcode <= 0x1AF)
3274 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
3275 ✗ else if (startcode == 0x1B0)
3276 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start");
3277 ✗ else if (startcode == 0x1B1)
3278 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End");
3279 ✗ else if (startcode == 0x1B2)
3280 ✗ av_log(s->avctx, AV_LOG_DEBUG, "User Data");
3281 ✗ else if (startcode == 0x1B3)
3282 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start");
3283 ✗ else if (startcode == 0x1B4)
3284 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error");
3285 ✗ else if (startcode == 0x1B5)
3286 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start");
3287 ✗ else if (startcode == 0x1B6)
3288 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start");
3289 ✗ else if (startcode == 0x1B7)
3290 ✗ av_log(s->avctx, AV_LOG_DEBUG, "slice start");
3291 ✗ else if (startcode == 0x1B8)
3292 ✗ av_log(s->avctx, AV_LOG_DEBUG, "extension start");
3293 ✗ else if (startcode == 0x1B9)
3294 ✗ av_log(s->avctx, AV_LOG_DEBUG, "fgs start");
3295 ✗ else if (startcode == 0x1BA)
3296 ✗ av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start");
3297 ✗ else if (startcode == 0x1BB)
3298 ✗ av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start");
3299 ✗ else if (startcode == 0x1BC)
3300 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start");
3301 ✗ else if (startcode == 0x1BD)
3302 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start");
3303 ✗ else if (startcode == 0x1BE)
3304 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start");
3305 ✗ else if (startcode == 0x1BF)
3306 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start");
3307 ✗ else if (startcode == 0x1C0)
3308 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start");
3309 ✗ else if (startcode == 0x1C1)
3310 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start");
3311 ✗ else if (startcode == 0x1C2)
3312 ✗ av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start");
3313 ✗ else if (startcode == 0x1C3)
3314 ✗ av_log(s->avctx, AV_LOG_DEBUG, "stuffing start");
3315 ✗ else if (startcode <= 0x1C5)
3316 ✗ av_log(s->avctx, AV_LOG_DEBUG, "reserved");
3317 ✗ else if (startcode <= 0x1FF)
3318 ✗ av_log(s->avctx, AV_LOG_DEBUG, "System start");
3319 ✗ av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb));
3320 }
3321
3322
4/4
✓ Branch 0 taken 11667 times.
✓ Branch 1 taken 1250 times.
✓ Branch 2 taken 1250 times.
✓ Branch 3 taken 10417 times.
 12917 if (startcode >= 0x120 && startcode <= 0x12F) {
3323
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1250 times.
 1250 if (vol) {
3324 ✗ av_log(s->avctx, AV_LOG_WARNING, "Ignoring multiple VOL headers\n");
3325 ✗ continue;
3326 }
3327 1250 vol++;
3328
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1250 times.
 1250 if ((ret = decode_vol_header(ctx, gb)) < 0)
3329 ✗ return ret;
3330
2/2
✓ Branch 0 taken 76 times.
✓ Branch 1 taken 11591 times.
 11667 } else if (startcode == USER_DATA_STARTCODE) {
3331 76 decode_user_data(ctx, gb);
3332
2/2
✓ Branch 0 taken 955 times.
✓ Branch 1 taken 10636 times.
 11591 } else if (startcode == GOP_STARTCODE) {
3333 955 mpeg4_decode_gop_header(s, gb);
3334
2/2
✓ Branch 0 taken 1218 times.
✓ Branch 1 taken 9418 times.
 10636 } else if (startcode == VOS_STARTCODE) {
3335 int profile, level;
3336 1218 mpeg4_decode_profile_level(s, gb, &profile, &level);
3337
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1218 times.
 1218 if (profile == FF_PROFILE_MPEG4_SIMPLE_STUDIO &&
3338 ✗ (level > 0 && level < 9)) {
3339 ✗ s->studio_profile = 1;
3340 ✗ next_start_code_studio(gb);
3341 ✗ extension_and_user_data(s, gb, 0);
3342
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1218 times.
 1218 } else if (s->studio_profile) {
3343 ✗ avpriv_request_sample(s->avctx, "Mix of studio and non studio profile");
3344 ✗ return AVERROR_PATCHWELCOME;
3345 }
3346 1218 s->avctx->profile = profile;
3347 1218 s->avctx->level = level;
3348
2/2
✓ Branch 0 taken 1218 times.
✓ Branch 1 taken 8200 times.
 9418 } else if (startcode == VISUAL_OBJ_STARTCODE) {
3349
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1218 times.
 1218 if (s->studio_profile) {
3350 ✗ if ((ret = decode_studiovisualobject(ctx, gb)) < 0)
3351 ✗ return ret;
3352 } else
3353 1218 mpeg4_decode_visual_object(s, gb);
3354
2/2
✓ Branch 0 taken 6950 times.
✓ Branch 1 taken 1250 times.
 8200 } else if (startcode == VOP_STARTCODE) {
3355 6950 break;
3356 }
3357
3358 5967 align_get_bits(gb);
3359 5967 startcode = 0xff;
3360 }
3361
3362 6950 end:
3363
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6950 times.
 6950 if (s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)
3364 ✗ s->low_delay = 1;
3365 6950 s->avctx->has_b_frames = !s->low_delay;
3366
3367
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 6950 times.
 6950 if (s->studio_profile) {
3368 ✗ if (!s->avctx->bits_per_raw_sample) {
3369 ✗ av_log(s->avctx, AV_LOG_ERROR, "Missing VOL header\n");
3370 ✗ return AVERROR_INVALIDDATA;
3371 }
3372 ✗ return decode_studio_vop_header(ctx, gb);
3373 } else
3374 6950 return decode_vop_header(ctx, gb);
3375 }
3376
3377 423 av_cold void ff_mpeg4videodec_static_init(void) {
3378 static int done = 0;
3379
3380
2/2
✓ Branch 0 taken 94 times.
✓ Branch 1 taken 329 times.
 423 if (!done) {
3381 static uint8_t mpeg4_rvlc_rl_tables[2][2][2 * MAX_RUN + MAX_LEVEL + 3];
3382
3383 94 ff_mpeg4_init_rl_intra();
3384 94 ff_rl_init(&ff_rvlc_rl_inter, mpeg4_rvlc_rl_tables[0]);
3385 94 ff_rl_init(&ff_rvlc_rl_intra, mpeg4_rvlc_rl_tables[1]);
3386 94 INIT_FIRST_VLC_RL(ff_mpeg4_rl_intra, 554);
3387
3/4
✓ Branch 0 taken 94 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 3008 times.
✓ Branch 3 taken 94 times.
 3102 INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
3388 94 INIT_FIRST_VLC_RL(ff_rvlc_rl_intra, 1072);
3389 94 INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
3390 &ff_mpeg4_DCtab_lum[0][1], 2, 1,
3391 &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
3392 94 INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
3393 &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
3394 &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
3395 94 INIT_VLC_STATIC_FROM_LENGTHS(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
3396 ff_sprite_trajectory_lens, 1,
3397 NULL, 0, 0, 0, 0, 128);
3398 94 INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
3399 &ff_mb_type_b_tab[0][1], 2, 1,
3400 &ff_mb_type_b_tab[0][0], 2, 1, 16);
3401 94 done = 1;
3402 }