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
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1299666 if (s->ac_pred) {
81
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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
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20713 if (s->mb_x == 0 || s->qscale == qscale_table[xy] ||
87 n == 1 || n == 3) {
88 /* same qscale */
89
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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
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9371 if (s->mb_y == 0 || s->qscale == qscale_table[xy] ||
102
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2 n == 2 || n == 3) {
103 /* same qscale */
104
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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
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10397328 for (i = 1; i < 8; i++)
115 9097662 ac_val1[i] = block[s->idsp.idct_permutation[i << 3]];
116
117 /* top copy */
118
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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
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1427120 if (s->workaround_bugs & FF_BUG_NO_PADDING && !ctx->resync_marker)
133 return 0;
134
135
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1427120 while (v <= 0xFF) {
136
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3299 if (s->pict_type == AV_PICTURE_TYPE_B ||
137
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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
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1427120 if (bits_count + 8 >= s->gb.size_in_bits) {
145 11669 v >>= 8;
146 11669 v |= 0x7F >> (7 - (bits_count & 7));
147
148
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11669 if (v == 0x7F)
149 11352 return s->mb_num;
150 } else {
151
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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
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72133 for (len = 0; len < 32; len++)
160
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72133 if (get_bits1(&s->gb))
161 4098 break;
162
163 4098 mb_num = get_bits(&s->gb, mb_num_bits);
164
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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
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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
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3867 if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20)
454 return AVERROR_INVALIDDATA;
455
456
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68178 for (len = 0; len < 32; len++)
457
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68178 if (get_bits1(&s->gb))
458 3867 break;
459
460
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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
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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
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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
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3867 if (ctx->shape != BIN_ONLY_SHAPE) {
481 3867 int qscale = get_bits(&s->gb, s->quant_precision);
482
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3867 if (qscale)
483 3867 s->chroma_qscale = s->qscale = qscale;
484 }
485
486
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3867 if (ctx->shape == RECT_SHAPE)
487 3867 header_extension = get_bits1(&s->gb);
488
489
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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
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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
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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
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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
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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
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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
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8311 for (; s->mb_y < s->mb_height; s->mb_y++) {
697 7839 ff_init_block_index(s);
698
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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
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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
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139320 if (s->pict_type == AV_PICTURE_TYPE_I) {
709 int i;
710
711 do {
712
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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
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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
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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
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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
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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
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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
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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
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121558 if (bits == MOTION_MARKER)
754 817 return mb_num - 1;
755
756 120741 skip_bits1(&s->gb);
757
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120741 if (bits & 0x10000) {
758 /* skip mb */
759
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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
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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
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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
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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
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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
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113457 if (s->mbintra_table[xy])
813 19851 ff_clean_intra_table_entries(s);
814
815
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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
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113457 if ((cbpc & 16) == 0) {
823 /* 16x16 motion prediction */
824
825 81626 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
826
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81626 if (!s->mcsel) {
827 81626 mx = ff_h263_decode_motion(s, pred_x, s->f_code);
828
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81626 if (mx >= 0xffff)
829 return AVERROR_INVALIDDATA;
830
831 81626 my = ff_h263_decode_motion(s, pred_y, s->f_code);
832
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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
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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
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127324 if (mx >= 0xffff)
860 return AVERROR_INVALIDDATA;
861
862 127324 my = ff_h263_decode_motion(s, pred_y, s->f_code);
863
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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
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7728 for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) {
890 7728 ff_init_block_index(s);
891
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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
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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
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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
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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
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✓ 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
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✓ 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
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✓ 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
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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
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✓ 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.
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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
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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
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✓ 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
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✓ Branch 1 taken 1229 times.
1728 if (s->pict_type == AV_PICTURE_TYPE_I) {
1000
1/2
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499 while (show_bits(&s->gb, 9) == 1)
1001 skip_bits(&s->gb, 9);
1002
1/2
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✓ 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
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✓ Branch 2 taken 1229 times.
1229 while (show_bits(&s->gb, 10) == 1)
1010 skip_bits(&s->gb, 10);
1011
1/2
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✓ 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
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✓ 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
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✓ 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
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✗ 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
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✓ Branch 1 taken 853942 times.
1068954 if (!coded)
1074 215012 goto not_coded;
1075
1076
1/2
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✓ 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
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✓ 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
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✓ 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
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✓ Branch 1 taken 17323 times.
138064 s->pict_type == AV_PICTURE_TYPE_S) {
1329 int i;
1330
2/2
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✓ 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
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✓ Branch 1 taken 119744 times.
120741 if (IS_SKIP(mb_type)) {
1337 /* skip mb */
1338
2/2
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✓ 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
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✗ 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
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✓ 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
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✗ 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
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✓ 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
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✓ Branch 1 taken 921397 times.
1289056 if (s->pict_type == AV_PICTURE_TYPE_P ||
1410
1/2
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✓ 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
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✓ 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
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✓ 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
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✓ 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
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✗ 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
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✓ 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
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✗ Branch 3 not taken.
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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
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154549 if (dquant)
1729 7107 ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
1730
1731
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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
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1081843 for (i = 0; i < 6; i++) {
1737
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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
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7144788 for (i = 0; i < 6; i++) {
1746
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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
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1289056 if (s->codec_id == AV_CODEC_ID_MPEG4) {
1754 1289056 int next = mpeg4_is_resync(ctx);
1755
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1289056 if (next) {
1756
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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
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13412 } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
1759 5468 return SLICE_END;
1760
1761
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7944 if (s->pict_type == AV_PICTURE_TYPE_B) {
1762
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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
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7944 (s->mb_x + delta >= s->mb_width)
1765
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168 ? FFMIN(s->mb_y + 1, s->mb_height - 1)
1766 : s->mb_y, 0);
1767
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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
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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
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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
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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
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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
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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
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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
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1250 if (s->vo_type == CORE_STUDIO_VO_TYPE ||
2312
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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
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1250 } else if (s->studio_profile) {
2319 return AVERROR_PATCHWELCOME;
2320 }
2321
2322
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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
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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
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1250 if ((ctx->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */
2337 1210 int chroma_format = get_bits(gb, 2);
2338
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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
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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
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40 if (s->picture_number == 0) {
2359
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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
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1250 if (ctx->shape != RECT_SHAPE)
2372 av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n");
2373
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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
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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
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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
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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
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1250 if (ctx->shape != BIN_ONLY_SHAPE) {
2402
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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
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1250 if (width && height && /* they should be non zero but who knows */
2409
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1250 !(s->width && s->codec_tag == AV_RL32("MP4S"))) {
2410
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1250 if (s->width && s->height &&
2411
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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
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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
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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
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1250 if (ctx->vol_sprite_usage == STATIC_SPRITE)
2430 av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n");
2431
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1250 if (ctx->vol_sprite_usage == STATIC_SPRITE ||
2432
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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
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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
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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
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23 if (get_bits1(gb)) {
2481 12 int last = 0;
2482
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360 for (i = 0; i < 64; i++) {
2483 int j;
2484
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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
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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
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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
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23 if (get_bits1(gb)) {
2508 12 int last = 0;
2509
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360 for (i = 0; i < 64; i++) {
2510 int j;
2511
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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
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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
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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
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1250 if (vo_ver_id != 1)
2537 505 s->quarter_sample = get_bits1(gb);
2538 else
2539 745 s->quarter_sample = 0;
2540
2541
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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
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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
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1250 if (s->data_partitioning)
2606 288 ctx->rvlc = get_bits1(gb);
2607
2608
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1250 if (vo_ver_id != 1) {
2609 505 ctx->new_pred = get_bits1(gb);
2610
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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
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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
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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
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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
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747 for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) {
2682
2/2
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✓ 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
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76 if (e < 2)
2691 76 e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
2692
2/2
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76 if (e >= 2) {
2693 11 ctx->divx_version = ver;
2694 11 ctx->divx_build = build;
2695
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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
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76 if (e != 4)
2701 76 e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
2702
1/2
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76 if (e != 4) {
2703 76 e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1;
2704
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76 if (e > 1) {
2705
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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
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76 if (e != 4) {
2715
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65 if (strcmp(buf, "ffmpeg") == 0)
2716 ctx->lavc_build = 4600;
2717 }
2718
2/2
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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
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✓ 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
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3474 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) {
2735
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3323 if (s->codec_tag == AV_RL32("XVID") ||
2736
1/2
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3323 s->codec_tag == AV_RL32("XVIX") ||
2737
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3323 s->codec_tag == AV_RL32("RMP4") ||
2738
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3323 s->codec_tag == AV_RL32("ZMP4") ||
2739
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3323 s->codec_tag == AV_RL32("SIPP"))
2740 ctx->xvid_build = 0;
2741 }
2742
2743
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3474 if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1)
2744
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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
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✓ 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
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3474 if (s->workaround_bugs & FF_BUG_AUTODETECT) {
2754
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3474 if (s->codec_tag == AV_RL32("XVIX"))
2755 s->workaround_bugs |= FF_BUG_XVID_ILACE;
2756
2757
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3474 if (s->codec_tag == AV_RL32("UMP4"))
2758 s->workaround_bugs |= FF_BUG_UMP4;
2759
2760
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3474 if (ctx->divx_version >= 500 && ctx->divx_build < 1814)
2761 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2762
2763
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3474 if (ctx->divx_version > 502 && ctx->divx_build < 1814)
2764 s->workaround_bugs |= FF_BUG_QPEL_CHROMA2;
2765
2766
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3474 if (ctx->xvid_build <= 3U)
2767 s->padding_bug_score = 256 * 256 * 256 * 64;
2768
2769
1/2
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3474 if (ctx->xvid_build <= 1U)
2770 s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
2771
2772
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3474 if (ctx->xvid_build <= 12U)
2773 s->workaround_bugs |= FF_BUG_EDGE;
2774
2775
1/2
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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
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3474 if (ctx->lavc_build < 4653U)
2784 s->workaround_bugs |= FF_BUG_STD_QPEL;
2785
2786
1/2
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3474 if (ctx->lavc_build < 4655U)
2787 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2788
2789
1/2
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3474 if (ctx->lavc_build < 4670U)
2790 s->workaround_bugs |= FF_BUG_EDGE;
2791
2792
1/2
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3474 if (ctx->lavc_build <= 4712U)
2793 s->workaround_bugs |= FF_BUG_DC_CLIP;
2794
2795
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3474 if ((ctx->lavc_build&0xFF) >= 100) {
2796
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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
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3474 if (ctx->divx_version >= 0)
2803 s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
2804
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3474 if (ctx->divx_version == 501 && ctx->divx_build == 20020416)
2805 s->padding_bug_score = 256 * 256 * 256 * 64;
2806
2807
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3474 if (ctx->divx_version < 500U)
2808 s->workaround_bugs |= FF_BUG_EDGE;
2809
2810
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3474 if (ctx->divx_version >= 0)
2811 s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
2812 }
2813
2814
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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
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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
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3474 if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0 &&
2837
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64 s->codec_id == AV_CODEC_ID_MPEG4 &&
2838
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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
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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
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✓ Branch 3 taken 256 times.
6950 s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B;
2862
2/2
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✓ 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
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✓ 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
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✓ Branch 1 taken 2 times.
6950 if (ctx->time_increment_bits == 0 ||
2874
2/2
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✓ 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
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110 ctx->time_increment_bits < 16;
2880 100 ctx->time_increment_bits++) {
2881
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110 if (s->pict_type == AV_PICTURE_TYPE_P ||
2882
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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
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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
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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
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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
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1365 if (s->pp_time <= s->pb_time ||
2921
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1365 s->pp_time <= s->pp_time - s->pb_time ||
2922
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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
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✓ Branch 1 taken 1150 times.
1365 if (ctx->t_frame == 0)
2929 215 ctx->t_frame = s->pb_time;
2930
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1365 if (ctx->t_frame == 0)
2931 ctx->t_frame = 1; // 1/0 protection
2932
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1365 s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, ctx->t_frame) -
2933
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1365 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2934
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1365 s->pb_field_time = (ROUNDED_DIV(s->time, ctx->t_frame) -
2935
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1365 ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2;
2936
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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
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2 if (!s->progressive_sequence)
2940 return FRAME_SKIPPED;
2941 }
2942 }
2943
2944
1/2
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6950 if (s->avctx->framerate.den)
2945
1/2
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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
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✓ Branch 2 taken 6942 times.
6950 if (get_bits1(gb) != 1) {
2954
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✓ 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
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6942 if (ctx->new_pred)
2959 decode_new_pred(ctx, gb);
2960
2961
1/2
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6942 if (ctx->shape != BIN_ONLY_SHAPE &&
2962
2/2
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✓ Branch 1 taken 4563 times.
6942 (s->pict_type == AV_PICTURE_TYPE_P ||
2963
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✓ 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
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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
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6942 if (ctx->shape != BIN_ONLY_SHAPE) {
2991 6942 skip_bits_long(gb, ctx->cplx_estimation_trash_i);
2992
2/2
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✓ 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
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✓ 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
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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
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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
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✓ 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
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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
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6942 if (ctx->shape != BIN_ONLY_SHAPE) {
3038 6942 s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision);
3039
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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
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6942 if (s->pict_type != AV_PICTURE_TYPE_I) {
3046 5928 s->f_code = get_bits(gb, 3); /* fcode_for */
3047
2/2
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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
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6938 if (s->pict_type == AV_PICTURE_TYPE_B) {
3057 1365 s->b_code = get_bits(gb, 3);
3058
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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
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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
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6938 if (!ctx->scalability) {
3086
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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
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6938 if (s->vo_type == 0 && ctx->vol_control_parameters == 0 &&
3102
3/4
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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
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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
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7444 if (!s->studio_profile && s->avctx->bits_per_raw_sample != 8)
3235 7444 s->avctx->bits_per_raw_sample = 0;
3236
3237
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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
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✓ Branch 2 taken 51672 times.
52166 if (get_bits_count(gb) >= gb->size_in_bits) {
3246
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494 if (gb->size_in_bits == 8 &&
3247
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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
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✗ 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
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51672 if ((startcode & 0xFFFFFF00) != 0x100)
3261 38755 continue; // no startcode
3262
3263
1/2
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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
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12917 if (startcode >= 0x120 && startcode <= 0x12F) {
3323
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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
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1250 if ((ret = decode_vol_header(ctx, gb)) < 0)
3329 return ret;
3330
2/2
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✓ Branch 1 taken 11591 times.
11667 } else if (startcode == USER_DATA_STARTCODE) {
3331 76 decode_user_data(ctx, gb);
3332
2/2
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✓ Branch 1 taken 10636 times.
11591 } else if (startcode == GOP_STARTCODE) {
3333 955 mpeg4_decode_gop_header(s, gb);
3334
2/2
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✓ 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
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✓ 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
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✓ 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
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✓ Branch 1 taken 8200 times.
9418 } else if (startcode == VISUAL_OBJ_STARTCODE) {
3349
1/2
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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
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✓ 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
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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
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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
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✓ 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
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✓ Branch 2 taken 3008 times.
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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 }