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1 | /* |
2 | * MPEG4 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/opt.h" | |
26 | #include "error_resilience.h" | |
27 | #include "idctdsp.h" | |
28 | #include "internal.h" | |
29 | #include "mpegutils.h" | |
30 | #include "mpegvideo.h" | |
31 | #include "mpeg4video.h" | |
32 | #include "h263.h" | |
33 | #include "thread.h" | |
34 | #include "xvididct.h" | |
35 | ||
36 | /* The defines below define the number of bits that are read at once for | |
37 | * reading vlc values. Changing these may improve speed and data cache needs | |
38 | * be aware though that decreasing them may need the number of stages that is | |
39 | * passed to get_vlc* to be increased. */ | |
40 | #define SPRITE_TRAJ_VLC_BITS 6 | |
41 | #define DC_VLC_BITS 9 | |
42 | #define MB_TYPE_B_VLC_BITS 4 | |
43 | ||
44 | static VLC dc_lum, dc_chrom; | |
45 | static VLC sprite_trajectory; | |
46 | static VLC mb_type_b_vlc; | |
47 | ||
48 | static const int mb_type_b_map[4] = { | |
49 | MB_TYPE_DIRECT2 | MB_TYPE_L0L1, | |
50 | MB_TYPE_L0L1 | MB_TYPE_16x16, | |
51 | MB_TYPE_L1 | MB_TYPE_16x16, | |
52 | MB_TYPE_L0 | MB_TYPE_16x16, | |
53 | }; | |
54 | ||
55 | /** | |
56 | * Predict the ac. | |
57 | * @param n block index (0-3 are luma, 4-5 are chroma) | |
58 | * @param dir the ac prediction direction | |
59 | */ | |
60 | void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir) | |
61 | { | |
62 | int i; | |
63 | int16_t *ac_val, *ac_val1; | |
64 | int8_t *const qscale_table = s->current_picture.qscale_table; | |
65 | ||
66 | /* find prediction */ | |
67 | ac_val = s->ac_val[0][0] + s->block_index[n] * 16; | |
68 | ac_val1 = ac_val; | |
69 | if (s->ac_pred) { | |
70 | if (dir == 0) { | |
71 | const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride; | |
72 | /* left prediction */ | |
73 | ac_val -= 16; | |
74 | ||
75 | if (s->mb_x == 0 || s->qscale == qscale_table[xy] || | |
76 | n == 1 || n == 3) { | |
77 | /* same qscale */ | |
78 | for (i = 1; i < 8; i++) | |
79 | block[s->idsp.idct_permutation[i << 3]] += ac_val[i]; | |
80 | } else { | |
81 | /* different qscale, we must rescale */ | |
82 | for (i = 1; i < 8; i++) | |
83 | block[s->idsp.idct_permutation[i << 3]] += ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale); | |
84 | } | |
85 | } else { | |
86 | const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride; | |
87 | /* top prediction */ | |
88 | ac_val -= 16 * s->block_wrap[n]; | |
89 | ||
90 | if (s->mb_y == 0 || s->qscale == qscale_table[xy] || | |
91 | n == 2 || n == 3) { | |
92 | /* same qscale */ | |
93 | for (i = 1; i < 8; i++) | |
94 | block[s->idsp.idct_permutation[i]] += ac_val[i + 8]; | |
95 | } else { | |
96 | /* different qscale, we must rescale */ | |
97 | for (i = 1; i < 8; i++) | |
98 | block[s->idsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale); | |
99 | } | |
100 | } | |
101 | } | |
102 | /* left copy */ | |
103 | for (i = 1; i < 8; i++) | |
104 | ac_val1[i] = block[s->idsp.idct_permutation[i << 3]]; | |
105 | ||
106 | /* top copy */ | |
107 | for (i = 1; i < 8; i++) | |
108 | ac_val1[8 + i] = block[s->idsp.idct_permutation[i]]; | |
109 | } | |
110 | ||
111 | /** | |
112 | * check if the next stuff is a resync marker or the end. | |
113 | * @return 0 if not | |
114 | */ | |
115 | static inline int mpeg4_is_resync(Mpeg4DecContext *ctx) | |
116 | { | |
117 | MpegEncContext *s = &ctx->m; | |
118 | int bits_count = get_bits_count(&s->gb); | |
119 | int v = show_bits(&s->gb, 16); | |
120 | ||
121 | if (s->workaround_bugs & FF_BUG_NO_PADDING && !ctx->resync_marker) | |
122 | return 0; | |
123 | ||
124 | while (v <= 0xFF) { | |
125 | if (s->pict_type == AV_PICTURE_TYPE_B || | |
126 | (v >> (8 - s->pict_type) != 1) || s->partitioned_frame) | |
127 | break; | |
128 | skip_bits(&s->gb, 8 + s->pict_type); | |
129 | bits_count += 8 + s->pict_type; | |
130 | v = show_bits(&s->gb, 16); | |
131 | } | |
132 | ||
133 | if (bits_count + 8 >= s->gb.size_in_bits) { | |
134 | v >>= 8; | |
135 | v |= 0x7F >> (7 - (bits_count & 7)); | |
136 | ||
137 | if (v == 0x7F) | |
138 | return s->mb_num; | |
139 | } else { | |
140 | if (v == ff_mpeg4_resync_prefix[bits_count & 7]) { | |
141 | int len, mb_num; | |
142 | int mb_num_bits = av_log2(s->mb_num - 1) + 1; | |
143 | GetBitContext gb = s->gb; | |
144 | ||
145 | skip_bits(&s->gb, 1); | |
146 | align_get_bits(&s->gb); | |
147 | ||
148 | for (len = 0; len < 32; len++) | |
149 | if (get_bits1(&s->gb)) | |
150 | break; | |
151 | ||
152 | mb_num = get_bits(&s->gb, mb_num_bits); | |
153 | if (!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits) | |
154 | mb_num= -1; | |
155 | ||
156 | s->gb = gb; | |
157 | ||
158 | if (len >= ff_mpeg4_get_video_packet_prefix_length(s)) | |
159 | return mb_num; | |
160 | } | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
165 | static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *gb) | |
166 | { | |
167 | MpegEncContext *s = &ctx->m; | |
168 | int a = 2 << s->sprite_warping_accuracy; | |
169 | int rho = 3 - s->sprite_warping_accuracy; | |
170 | int r = 16 / a; | |
171 | int alpha = 0; | |
172 | int beta = 0; | |
173 | int w = s->width; | |
174 | int h = s->height; | |
175 | int min_ab, i, w2, h2, w3, h3; | |
176 | int sprite_ref[4][2]; | |
177 | int virtual_ref[2][2]; | |
178 | ||
179 | // only true for rectangle shapes | |
180 | const int vop_ref[4][2] = { { 0, 0 }, { s->width, 0 }, | |
181 | { 0, s->height }, { s->width, s->height } }; | |
182 | int d[4][2] = { { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 } }; | |
183 | ||
184 | if (w <= 0 || h <= 0) | |
185 | return AVERROR_INVALIDDATA; | |
186 | ||
187 | for (i = 0; i < ctx->num_sprite_warping_points; i++) { | |
188 | int length; | |
189 | int x = 0, y = 0; | |
190 | ||
191 | length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); | |
192 | if (length) | |
193 | x = get_xbits(gb, length); | |
194 | ||
195 | if (!(ctx->divx_version == 500 && ctx->divx_build == 413)) | |
196 | skip_bits1(gb); /* marker bit */ | |
197 | ||
198 | length = get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); | |
199 | if (length) | |
200 | y = get_xbits(gb, length); | |
201 | ||
202 | skip_bits1(gb); /* marker bit */ | |
203 | ctx->sprite_traj[i][0] = d[i][0] = x; | |
204 | ctx->sprite_traj[i][1] = d[i][1] = y; | |
205 | } | |
206 | for (; i < 4; i++) | |
207 | ctx->sprite_traj[i][0] = ctx->sprite_traj[i][1] = 0; | |
208 | ||
209 | while ((1 << alpha) < w) | |
210 | alpha++; | |
211 | while ((1 << beta) < h) | |
212 | beta++; /* typo in the mpeg4 std for the definition of w' and h' */ | |
213 | w2 = 1 << alpha; | |
214 | h2 = 1 << beta; | |
215 | ||
216 | // Note, the 4th point isn't used for GMC | |
217 | if (ctx->divx_version == 500 && ctx->divx_build == 413) { | |
218 | sprite_ref[0][0] = a * vop_ref[0][0] + d[0][0]; | |
219 | sprite_ref[0][1] = a * vop_ref[0][1] + d[0][1]; | |
220 | sprite_ref[1][0] = a * vop_ref[1][0] + d[0][0] + d[1][0]; | |
221 | sprite_ref[1][1] = a * vop_ref[1][1] + d[0][1] + d[1][1]; | |
222 | sprite_ref[2][0] = a * vop_ref[2][0] + d[0][0] + d[2][0]; | |
223 | sprite_ref[2][1] = a * vop_ref[2][1] + d[0][1] + d[2][1]; | |
224 | } else { | |
225 | sprite_ref[0][0] = (a >> 1) * (2 * vop_ref[0][0] + d[0][0]); | |
226 | sprite_ref[0][1] = (a >> 1) * (2 * vop_ref[0][1] + d[0][1]); | |
227 | sprite_ref[1][0] = (a >> 1) * (2 * vop_ref[1][0] + d[0][0] + d[1][0]); | |
228 | sprite_ref[1][1] = (a >> 1) * (2 * vop_ref[1][1] + d[0][1] + d[1][1]); | |
229 | sprite_ref[2][0] = (a >> 1) * (2 * vop_ref[2][0] + d[0][0] + d[2][0]); | |
230 | sprite_ref[2][1] = (a >> 1) * (2 * vop_ref[2][1] + d[0][1] + d[2][1]); | |
231 | } | |
232 | /* sprite_ref[3][0] = (a >> 1) * (2 * vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); | |
233 | * sprite_ref[3][1] = (a >> 1) * (2 * vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ | |
234 | ||
235 | /* this is mostly identical to the mpeg4 std (and is totally unreadable | |
236 | * because of that...). Perhaps it should be reordered to be more readable. | |
237 | * The idea behind this virtual_ref mess is to be able to use shifts later | |
238 | * per pixel instead of divides so the distance between points is converted | |
239 | * from w&h based to w2&h2 based which are of the 2^x form. */ | |
240 | virtual_ref[0][0] = 16 * (vop_ref[0][0] + w2) + | |
241 | ROUNDED_DIV(((w - w2) * | |
242 | (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) + | |
243 | w2 * (r * sprite_ref[1][0] - 16 * vop_ref[1][0])), w); | |
244 | virtual_ref[0][1] = 16 * vop_ref[0][1] + | |
245 | ROUNDED_DIV(((w - w2) * | |
246 | (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) + | |
247 | w2 * (r * sprite_ref[1][1] - 16 * vop_ref[1][1])), w); | |
248 | virtual_ref[1][0] = 16 * vop_ref[0][0] + | |
249 | ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][0] - 16 * vop_ref[0][0]) + | |
250 | h2 * (r * sprite_ref[2][0] - 16 * vop_ref[2][0])), h); | |
251 | virtual_ref[1][1] = 16 * (vop_ref[0][1] + h2) + | |
252 | ROUNDED_DIV(((h - h2) * (r * sprite_ref[0][1] - 16 * vop_ref[0][1]) + | |
253 | h2 * (r * sprite_ref[2][1] - 16 * vop_ref[2][1])), h); | |
254 | ||
255 | switch (ctx->num_sprite_warping_points) { | |
256 | case 0: | |
257 | s->sprite_offset[0][0] = | |
258 | s->sprite_offset[0][1] = | |
259 | s->sprite_offset[1][0] = | |
260 | s->sprite_offset[1][1] = 0; | |
261 | s->sprite_delta[0][0] = a; | |
262 | s->sprite_delta[0][1] = | |
263 | s->sprite_delta[1][0] = 0; | |
264 | s->sprite_delta[1][1] = a; | |
265 | ctx->sprite_shift[0] = | |
266 | ctx->sprite_shift[1] = 0; | |
267 | break; | |
268 | case 1: // GMC only | |
269 | s->sprite_offset[0][0] = sprite_ref[0][0] - a * vop_ref[0][0]; | |
270 | s->sprite_offset[0][1] = sprite_ref[0][1] - a * vop_ref[0][1]; | |
271 | s->sprite_offset[1][0] = ((sprite_ref[0][0] >> 1) | (sprite_ref[0][0] & 1)) - | |
272 | a * (vop_ref[0][0] / 2); | |
273 | s->sprite_offset[1][1] = ((sprite_ref[0][1] >> 1) | (sprite_ref[0][1] & 1)) - | |
274 | a * (vop_ref[0][1] / 2); | |
275 | s->sprite_delta[0][0] = a; | |
276 | s->sprite_delta[0][1] = | |
277 | s->sprite_delta[1][0] = 0; | |
278 | s->sprite_delta[1][1] = a; | |
279 | ctx->sprite_shift[0] = | |
280 | ctx->sprite_shift[1] = 0; | |
281 | break; | |
282 | case 2: | |
283 | s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + rho)) + | |
284 | (-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
285 | (-vop_ref[0][0]) + | |
286 | (r * sprite_ref[0][1] - virtual_ref[0][1]) * | |
287 | (-vop_ref[0][1]) + (1 << (alpha + rho - 1)); | |
288 | s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + rho)) + | |
289 | (-r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
290 | (-vop_ref[0][0]) + | |
291 | (-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
292 | (-vop_ref[0][1]) + (1 << (alpha + rho - 1)); | |
293 | s->sprite_offset[1][0] = ((-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
294 | (-2 * vop_ref[0][0] + 1) + | |
295 | (r * sprite_ref[0][1] - virtual_ref[0][1]) * | |
296 | (-2 * vop_ref[0][1] + 1) + 2 * w2 * r * | |
297 | sprite_ref[0][0] - 16 * w2 + (1 << (alpha + rho + 1))); | |
298 | s->sprite_offset[1][1] = ((-r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
299 | (-2 * vop_ref[0][0] + 1) + | |
300 | (-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
301 | (-2 * vop_ref[0][1] + 1) + 2 * w2 * r * | |
302 | sprite_ref[0][1] - 16 * w2 + (1 << (alpha + rho + 1))); | |
303 | s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); | |
304 | s->sprite_delta[0][1] = (+r * sprite_ref[0][1] - virtual_ref[0][1]); | |
305 | s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]); | |
306 | s->sprite_delta[1][1] = (-r * sprite_ref[0][0] + virtual_ref[0][0]); | |
307 | ||
308 | ctx->sprite_shift[0] = alpha + rho; | |
309 | ctx->sprite_shift[1] = alpha + rho + 2; | |
310 | break; | |
311 | case 3: | |
312 | min_ab = FFMIN(alpha, beta); | |
313 | w3 = w2 >> min_ab; | |
314 | h3 = h2 >> min_ab; | |
315 | s->sprite_offset[0][0] = (sprite_ref[0][0] << (alpha + beta + rho - min_ab)) + | |
316 | (-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
317 | h3 * (-vop_ref[0][0]) + | |
318 | (-r * sprite_ref[0][0] + virtual_ref[1][0]) * | |
319 | w3 * (-vop_ref[0][1]) + | |
320 | (1 << (alpha + beta + rho - min_ab - 1)); | |
321 | s->sprite_offset[0][1] = (sprite_ref[0][1] << (alpha + beta + rho - min_ab)) + | |
322 | (-r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
323 | h3 * (-vop_ref[0][0]) + | |
324 | (-r * sprite_ref[0][1] + virtual_ref[1][1]) * | |
325 | w3 * (-vop_ref[0][1]) + | |
326 | (1 << (alpha + beta + rho - min_ab - 1)); | |
327 | s->sprite_offset[1][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * | |
328 | h3 * (-2 * vop_ref[0][0] + 1) + | |
329 | (-r * sprite_ref[0][0] + virtual_ref[1][0]) * | |
330 | w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 * | |
331 | r * sprite_ref[0][0] - 16 * w2 * h3 + | |
332 | (1 << (alpha + beta + rho - min_ab + 1)); | |
333 | s->sprite_offset[1][1] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * | |
334 | h3 * (-2 * vop_ref[0][0] + 1) + | |
335 | (-r * sprite_ref[0][1] + virtual_ref[1][1]) * | |
336 | w3 * (-2 * vop_ref[0][1] + 1) + 2 * w2 * h3 * | |
337 | r * sprite_ref[0][1] - 16 * w2 * h3 + | |
338 | (1 << (alpha + beta + rho - min_ab + 1)); | |
339 | s->sprite_delta[0][0] = (-r * sprite_ref[0][0] + virtual_ref[0][0]) * h3; | |
340 | s->sprite_delta[0][1] = (-r * sprite_ref[0][0] + virtual_ref[1][0]) * w3; | |
341 | s->sprite_delta[1][0] = (-r * sprite_ref[0][1] + virtual_ref[0][1]) * h3; | |
342 | s->sprite_delta[1][1] = (-r * sprite_ref[0][1] + virtual_ref[1][1]) * w3; | |
343 | ||
344 | ctx->sprite_shift[0] = alpha + beta + rho - min_ab; | |
345 | ctx->sprite_shift[1] = alpha + beta + rho - min_ab + 2; | |
346 | break; | |
347 | } | |
348 | /* try to simplify the situation */ | |
349 | if (s->sprite_delta[0][0] == a << ctx->sprite_shift[0] && | |
350 | s->sprite_delta[0][1] == 0 && | |
351 | s->sprite_delta[1][0] == 0 && | |
352 | s->sprite_delta[1][1] == a << ctx->sprite_shift[0]) { | |
353 | s->sprite_offset[0][0] >>= ctx->sprite_shift[0]; | |
354 | s->sprite_offset[0][1] >>= ctx->sprite_shift[0]; | |
355 | s->sprite_offset[1][0] >>= ctx->sprite_shift[1]; | |
356 | s->sprite_offset[1][1] >>= ctx->sprite_shift[1]; | |
357 | s->sprite_delta[0][0] = a; | |
358 | s->sprite_delta[0][1] = 0; | |
359 | s->sprite_delta[1][0] = 0; | |
360 | s->sprite_delta[1][1] = a; | |
361 | ctx->sprite_shift[0] = 0; | |
362 | ctx->sprite_shift[1] = 0; | |
363 | s->real_sprite_warping_points = 1; | |
364 | } else { | |
365 | int shift_y = 16 - ctx->sprite_shift[0]; | |
366 | int shift_c = 16 - ctx->sprite_shift[1]; | |
367 | for (i = 0; i < 2; i++) { | |
368 | s->sprite_offset[0][i] <<= shift_y; | |
369 | s->sprite_offset[1][i] <<= shift_c; | |
370 | s->sprite_delta[0][i] <<= shift_y; | |
371 | s->sprite_delta[1][i] <<= shift_y; | |
372 | ctx->sprite_shift[i] = 16; | |
373 | } | |
374 | s->real_sprite_warping_points = ctx->num_sprite_warping_points; | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
380 | static int decode_new_pred(Mpeg4DecContext *ctx, GetBitContext *gb) { | |
381 | int len = FFMIN(ctx->time_increment_bits + 3, 15); | |
382 | ||
383 | get_bits(gb, len); | |
384 | if (get_bits1(gb)) | |
385 | get_bits(gb, len); | |
386 | check_marker(gb, "after new_pred"); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
391 | /** | |
392 | * Decode the next video packet. | |
393 | * @return <0 if something went wrong | |
394 | */ | |
395 | int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx) | |
396 | { | |
397 | MpegEncContext *s = &ctx->m; | |
398 | ||
399 | int mb_num_bits = av_log2(s->mb_num - 1) + 1; | |
400 | int header_extension = 0, mb_num, len; | |
401 | ||
402 | /* is there enough space left for a video packet + header */ | |
403 | if (get_bits_count(&s->gb) > s->gb.size_in_bits - 20) | |
404 | return -1; | |
405 | ||
406 | for (len = 0; len < 32; len++) | |
407 | if (get_bits1(&s->gb)) | |
408 | break; | |
409 | ||
410 | if (len != ff_mpeg4_get_video_packet_prefix_length(s)) { | |
411 | av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n"); | |
412 | return -1; | |
413 | } | |
414 | ||
415 | if (ctx->shape != RECT_SHAPE) { | |
416 | header_extension = get_bits1(&s->gb); | |
417 | // FIXME more stuff here | |
418 | } | |
419 | ||
420 | mb_num = get_bits(&s->gb, mb_num_bits); | |
421 | if (mb_num >= s->mb_num) { | |
422 | av_log(s->avctx, AV_LOG_ERROR, | |
423 | "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); | |
424 | return -1; | |
425 | } | |
426 | ||
427 | s->mb_x = mb_num % s->mb_width; | |
428 | s->mb_y = mb_num / s->mb_width; | |
429 | ||
430 | if (ctx->shape != BIN_ONLY_SHAPE) { | |
431 | int qscale = get_bits(&s->gb, s->quant_precision); | |
432 | if (qscale) | |
433 | s->chroma_qscale = s->qscale = qscale; | |
434 | } | |
435 | ||
436 | if (ctx->shape == RECT_SHAPE) | |
437 | header_extension = get_bits1(&s->gb); | |
438 | ||
439 | if (header_extension) { | |
440 | int time_incr = 0; | |
441 | ||
442 | while (get_bits1(&s->gb) != 0) | |
443 | time_incr++; | |
444 | ||
445 | check_marker(&s->gb, "before time_increment in video packed header"); | |
446 | skip_bits(&s->gb, ctx->time_increment_bits); /* time_increment */ | |
447 | check_marker(&s->gb, "before vop_coding_type in video packed header"); | |
448 | ||
449 | skip_bits(&s->gb, 2); /* vop coding type */ | |
450 | // FIXME not rect stuff here | |
451 | ||
452 | if (ctx->shape != BIN_ONLY_SHAPE) { | |
453 | skip_bits(&s->gb, 3); /* intra dc vlc threshold */ | |
454 | // FIXME don't just ignore everything | |
455 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
456 | ctx->vol_sprite_usage == GMC_SPRITE) { | |
457 | if (mpeg4_decode_sprite_trajectory(ctx, &s->gb) < 0) | |
458 | return AVERROR_INVALIDDATA; | |
459 | av_log(s->avctx, AV_LOG_ERROR, "untested\n"); | |
460 | } | |
461 | ||
462 | // FIXME reduced res stuff here | |
463 | ||
464 | if (s->pict_type != AV_PICTURE_TYPE_I) { | |
465 | int f_code = get_bits(&s->gb, 3); /* fcode_for */ | |
466 | if (f_code == 0) | |
467 | av_log(s->avctx, AV_LOG_ERROR, | |
468 | "Error, video packet header damaged (f_code=0)\n"); | |
469 | } | |
470 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
471 | int b_code = get_bits(&s->gb, 3); | |
472 | if (b_code == 0) | |
473 | av_log(s->avctx, AV_LOG_ERROR, | |
474 | "Error, video packet header damaged (b_code=0)\n"); | |
475 | } | |
476 | } | |
477 | } | |
478 | if (ctx->new_pred) | |
479 | decode_new_pred(ctx, &s->gb); | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
484 | /** | |
485 | * Get the average motion vector for a GMC MB. | |
486 | * @param n either 0 for the x component or 1 for y | |
487 | * @return the average MV for a GMC MB | |
488 | */ | |
489 | static inline int get_amv(Mpeg4DecContext *ctx, int n) | |
490 | { | |
491 | MpegEncContext *s = &ctx->m; | |
492 | int x, y, mb_v, sum, dx, dy, shift; | |
493 | int len = 1 << (s->f_code + 4); | |
494 | const int a = s->sprite_warping_accuracy; | |
495 | ||
496 | if (s->workaround_bugs & FF_BUG_AMV) | |
497 | len >>= s->quarter_sample; | |
498 | ||
499 | if (s->real_sprite_warping_points == 1) { | |
500 | if (ctx->divx_version == 500 && ctx->divx_build == 413) | |
501 | sum = s->sprite_offset[0][n] / (1 << (a - s->quarter_sample)); | |
502 | else | |
503 | sum = RSHIFT(s->sprite_offset[0][n] << s->quarter_sample, a); | |
504 | } else { | |
505 | dx = s->sprite_delta[n][0]; | |
506 | dy = s->sprite_delta[n][1]; | |
507 | shift = ctx->sprite_shift[0]; | |
508 | if (n) | |
509 | dy -= 1 << (shift + a + 1); | |
510 | else | |
511 | dx -= 1 << (shift + a + 1); | |
512 | mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16 + dy * s->mb_y * 16; | |
513 | ||
514 | sum = 0; | |
515 | for (y = 0; y < 16; y++) { | |
516 | int v; | |
517 | ||
518 | v = mb_v + dy * y; | |
519 | // FIXME optimize | |
520 | for (x = 0; x < 16; x++) { | |
521 | sum += v >> shift; | |
522 | v += dx; | |
523 | } | |
524 | } | |
525 | sum = RSHIFT(sum, a + 8 - s->quarter_sample); | |
526 | } | |
527 | ||
528 | if (sum < -len) | |
529 | sum = -len; | |
530 | else if (sum >= len) | |
531 | sum = len - 1; | |
532 | ||
533 | return sum; | |
534 | } | |
535 | ||
536 | /** | |
537 | * Decode the dc value. | |
538 | * @param n block index (0-3 are luma, 4-5 are chroma) | |
539 | * @param dir_ptr the prediction direction will be stored here | |
540 | * @return the quantized dc | |
541 | */ | |
542 | static inline int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr) | |
543 | { | |
544 | int level, code; | |
545 | ||
546 | if (n < 4) | |
547 | code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1); | |
548 | else | |
549 | code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1); | |
550 | ||
551 | if (code < 0 || code > 9 /* && s->nbit < 9 */) { | |
552 | av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); | |
553 | return -1; | |
554 | } | |
555 | ||
556 | if (code == 0) { | |
557 | level = 0; | |
558 | } else { | |
559 | if (IS_3IV1) { | |
560 | if (code == 1) | |
561 | level = 2 * get_bits1(&s->gb) - 1; | |
562 | else { | |
563 | if (get_bits1(&s->gb)) | |
564 | level = get_bits(&s->gb, code - 1) + (1 << (code - 1)); | |
565 | else | |
566 | level = -get_bits(&s->gb, code - 1) - (1 << (code - 1)); | |
567 | } | |
568 | } else { | |
569 | level = get_xbits(&s->gb, code); | |
570 | } | |
571 | ||
572 | if (code > 8) { | |
573 | if (get_bits1(&s->gb) == 0) { /* marker */ | |
574 | if (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) { | |
575 | av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n"); | |
576 | return -1; | |
577 | } | |
578 | } | |
579 | } | |
580 | } | |
581 | ||
582 | return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0); | |
583 | } | |
584 | ||
585 | /** | |
586 | * Decode first partition. | |
587 | * @return number of MBs decoded or <0 if an error occurred | |
588 | */ | |
589 | static int mpeg4_decode_partition_a(Mpeg4DecContext *ctx) | |
590 | { | |
591 | MpegEncContext *s = &ctx->m; | |
592 | int mb_num = 0; | |
593 | static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; | |
594 | ||
595 | /* decode first partition */ | |
596 | s->first_slice_line = 1; | |
597 | for (; s->mb_y < s->mb_height; s->mb_y++) { | |
598 | ff_init_block_index(s); | |
599 | for (; s->mb_x < s->mb_width; s->mb_x++) { | |
600 | const int xy = s->mb_x + s->mb_y * s->mb_stride; | |
601 | int cbpc; | |
602 | int dir = 0; | |
603 | ||
604 | mb_num++; | |
605 | ff_update_block_index(s); | |
606 | if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) | |
607 | s->first_slice_line = 0; | |
608 | ||
609 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
610 | int i; | |
611 | ||
612 | do { | |
613 | if (show_bits_long(&s->gb, 19) == DC_MARKER) | |
614 | return mb_num - 1; | |
615 | ||
616 | cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); | |
617 | if (cbpc < 0) { | |
618 | av_log(s->avctx, AV_LOG_ERROR, | |
619 | "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y); | |
620 | return -1; | |
621 | } | |
622 | } while (cbpc == 8); | |
623 | ||
624 | s->cbp_table[xy] = cbpc & 3; | |
625 | s->current_picture.mb_type[xy] = MB_TYPE_INTRA; | |
626 | s->mb_intra = 1; | |
627 | ||
628 | if (cbpc & 4) | |
629 | ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); | |
630 | ||
631 | s->current_picture.qscale_table[xy] = s->qscale; | |
632 | ||
633 | s->mbintra_table[xy] = 1; | |
634 | for (i = 0; i < 6; i++) { | |
635 | int dc_pred_dir; | |
636 | int dc = mpeg4_decode_dc(s, i, &dc_pred_dir); | |
637 | if (dc < 0) { | |
638 | av_log(s->avctx, AV_LOG_ERROR, | |
639 | "DC corrupted at %d %d\n", s->mb_x, s->mb_y); | |
640 | return -1; | |
641 | } | |
642 | dir <<= 1; | |
643 | if (dc_pred_dir) | |
644 | dir |= 1; | |
645 | } | |
646 | s->pred_dir_table[xy] = dir; | |
647 | } else { /* P/S_TYPE */ | |
648 | int mx, my, pred_x, pred_y, bits; | |
649 | int16_t *const mot_val = s->current_picture.motion_val[0][s->block_index[0]]; | |
650 | const int stride = s->b8_stride * 2; | |
651 | ||
652 | try_again: | |
653 | bits = show_bits(&s->gb, 17); | |
654 | if (bits == MOTION_MARKER) | |
655 | return mb_num - 1; | |
656 | ||
657 | skip_bits1(&s->gb); | |
658 | if (bits & 0x10000) { | |
659 | /* skip mb */ | |
660 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
661 | ctx->vol_sprite_usage == GMC_SPRITE) { | |
662 | s->current_picture.mb_type[xy] = MB_TYPE_SKIP | | |
663 | MB_TYPE_16x16 | | |
664 | MB_TYPE_GMC | | |
665 | MB_TYPE_L0; | |
666 | mx = get_amv(ctx, 0); | |
667 | my = get_amv(ctx, 1); | |
668 | } else { | |
669 | s->current_picture.mb_type[xy] = MB_TYPE_SKIP | | |
670 | MB_TYPE_16x16 | | |
671 | MB_TYPE_L0; | |
672 | mx = my = 0; | |
673 | } | |
674 | mot_val[0] = | |
675 | mot_val[2] = | |
676 | mot_val[0 + stride] = | |
677 | mot_val[2 + stride] = mx; | |
678 | mot_val[1] = | |
679 | mot_val[3] = | |
680 | mot_val[1 + stride] = | |
681 | mot_val[3 + stride] = my; | |
682 | ||
683 | if (s->mbintra_table[xy]) | |
684 | ff_clean_intra_table_entries(s); | |
685 | continue; | |
686 | } | |
687 | ||
688 | cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); | |
689 | if (cbpc < 0) { | |
690 | av_log(s->avctx, AV_LOG_ERROR, | |
691 | "mcbpc corrupted at %d %d\n", s->mb_x, s->mb_y); | |
692 | return -1; | |
693 | } | |
694 | if (cbpc == 20) | |
695 | goto try_again; | |
696 | ||
697 | s->cbp_table[xy] = cbpc & (8 + 3); // 8 is dquant | |
698 | ||
699 | s->mb_intra = ((cbpc & 4) != 0); | |
700 | ||
701 | if (s->mb_intra) { | |
702 | s->current_picture.mb_type[xy] = MB_TYPE_INTRA; | |
703 | s->mbintra_table[xy] = 1; | |
704 | mot_val[0] = | |
705 | mot_val[2] = | |
706 | mot_val[0 + stride] = | |
707 | mot_val[2 + stride] = 0; | |
708 | mot_val[1] = | |
709 | mot_val[3] = | |
710 | mot_val[1 + stride] = | |
711 | mot_val[3 + stride] = 0; | |
712 | } else { | |
713 | if (s->mbintra_table[xy]) | |
714 | ff_clean_intra_table_entries(s); | |
715 | ||
716 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
717 | ctx->vol_sprite_usage == GMC_SPRITE && | |
718 | (cbpc & 16) == 0) | |
719 | s->mcsel = get_bits1(&s->gb); | |
720 | else | |
721 | s->mcsel = 0; | |
722 | ||
723 | if ((cbpc & 16) == 0) { | |
724 | /* 16x16 motion prediction */ | |
725 | ||
726 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); | |
727 | if (!s->mcsel) { | |
728 | mx = ff_h263_decode_motion(s, pred_x, s->f_code); | |
729 | if (mx >= 0xffff) | |
730 | return -1; | |
731 | ||
732 | my = ff_h263_decode_motion(s, pred_y, s->f_code); | |
733 | if (my >= 0xffff) | |
734 | return -1; | |
735 | s->current_picture.mb_type[xy] = MB_TYPE_16x16 | | |
736 | MB_TYPE_L0; | |
737 | } else { | |
738 | mx = get_amv(ctx, 0); | |
739 | my = get_amv(ctx, 1); | |
740 | s->current_picture.mb_type[xy] = MB_TYPE_16x16 | | |
741 | MB_TYPE_GMC | | |
742 | MB_TYPE_L0; | |
743 | } | |
744 | ||
745 | mot_val[0] = | |
746 | mot_val[2] = | |
747 | mot_val[0 + stride] = | |
748 | mot_val[2 + stride] = mx; | |
749 | mot_val[1] = | |
750 | mot_val[3] = | |
751 | mot_val[1 + stride] = | |
752 | mot_val[3 + stride] = my; | |
753 | } else { | |
754 | int i; | |
755 | s->current_picture.mb_type[xy] = MB_TYPE_8x8 | | |
756 | MB_TYPE_L0; | |
757 | for (i = 0; i < 4; i++) { | |
758 | int16_t *mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); | |
759 | mx = ff_h263_decode_motion(s, pred_x, s->f_code); | |
760 | if (mx >= 0xffff) | |
761 | return -1; | |
762 | ||
763 | my = ff_h263_decode_motion(s, pred_y, s->f_code); | |
764 | if (my >= 0xffff) | |
765 | return -1; | |
766 | mot_val[0] = mx; | |
767 | mot_val[1] = my; | |
768 | } | |
769 | } | |
770 | } | |
771 | } | |
772 | } | |
773 | s->mb_x = 0; | |
774 | } | |
775 | ||
776 | return mb_num; | |
777 | } | |
778 | ||
779 | /** | |
780 | * decode second partition. | |
781 | * @return <0 if an error occurred | |
782 | */ | |
783 | static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count) | |
784 | { | |
785 | int mb_num = 0; | |
786 | static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; | |
787 | ||
788 | s->mb_x = s->resync_mb_x; | |
789 | s->first_slice_line = 1; | |
790 | for (s->mb_y = s->resync_mb_y; mb_num < mb_count; s->mb_y++) { | |
791 | ff_init_block_index(s); | |
792 | for (; mb_num < mb_count && s->mb_x < s->mb_width; s->mb_x++) { | |
793 | const int xy = s->mb_x + s->mb_y * s->mb_stride; | |
794 | ||
795 | mb_num++; | |
796 | ff_update_block_index(s); | |
797 | if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) | |
798 | s->first_slice_line = 0; | |
799 | ||
800 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
801 | int ac_pred = get_bits1(&s->gb); | |
802 | int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); | |
803 | if (cbpy < 0) { | |
804 | av_log(s->avctx, AV_LOG_ERROR, | |
805 | "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); | |
806 | return -1; | |
807 | } | |
808 | ||
809 | s->cbp_table[xy] |= cbpy << 2; | |
810 | s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; | |
811 | } else { /* P || S_TYPE */ | |
812 | if (IS_INTRA(s->current_picture.mb_type[xy])) { | |
813 | int i; | |
814 | int dir = 0; | |
815 | int ac_pred = get_bits1(&s->gb); | |
816 | int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); | |
817 | ||
818 | if (cbpy < 0) { | |
819 | av_log(s->avctx, AV_LOG_ERROR, | |
820 | "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); | |
821 | return -1; | |
822 | } | |
823 | ||
824 | if (s->cbp_table[xy] & 8) | |
825 | ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); | |
826 | s->current_picture.qscale_table[xy] = s->qscale; | |
827 | ||
828 | for (i = 0; i < 6; i++) { | |
829 | int dc_pred_dir; | |
830 | int dc = mpeg4_decode_dc(s, i, &dc_pred_dir); | |
831 | if (dc < 0) { | |
832 | av_log(s->avctx, AV_LOG_ERROR, | |
833 | "DC corrupted at %d %d\n", s->mb_x, s->mb_y); | |
834 | return -1; | |
835 | } | |
836 | dir <<= 1; | |
837 | if (dc_pred_dir) | |
838 | dir |= 1; | |
839 | } | |
840 | s->cbp_table[xy] &= 3; // remove dquant | |
841 | s->cbp_table[xy] |= cbpy << 2; | |
842 | s->current_picture.mb_type[xy] |= ac_pred * MB_TYPE_ACPRED; | |
843 | s->pred_dir_table[xy] = dir; | |
844 | } else if (IS_SKIP(s->current_picture.mb_type[xy])) { | |
845 | s->current_picture.qscale_table[xy] = s->qscale; | |
846 | s->cbp_table[xy] = 0; | |
847 | } else { | |
848 | int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); | |
849 | ||
850 | if (cbpy < 0) { | |
851 | av_log(s->avctx, AV_LOG_ERROR, | |
852 | "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); | |
853 | return -1; | |
854 | } | |
855 | ||
856 | if (s->cbp_table[xy] & 8) | |
857 | ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); | |
858 | s->current_picture.qscale_table[xy] = s->qscale; | |
859 | ||
860 | s->cbp_table[xy] &= 3; // remove dquant | |
861 | s->cbp_table[xy] |= (cbpy ^ 0xf) << 2; | |
862 | } | |
863 | } | |
864 | } | |
865 | if (mb_num >= mb_count) | |
866 | return 0; | |
867 | s->mb_x = 0; | |
868 | } | |
869 | return 0; | |
870 | } | |
871 | ||
872 | /** | |
873 | * Decode the first and second partition. | |
874 | * @return <0 if error (and sets error type in the error_status_table) | |
875 | */ | |
876 | int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx) | |
877 | { | |
878 | MpegEncContext *s = &ctx->m; | |
879 | int mb_num; | |
880 | const int part_a_error = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_ERROR | ER_MV_ERROR) : ER_MV_ERROR; | |
881 | const int part_a_end = s->pict_type == AV_PICTURE_TYPE_I ? (ER_DC_END | ER_MV_END) : ER_MV_END; | |
882 | ||
883 | mb_num = mpeg4_decode_partition_a(ctx); | |
884 | if (mb_num < 0) { | |
885 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
886 | s->mb_x, s->mb_y, part_a_error); | |
887 | return -1; | |
888 | } | |
889 | ||
890 | if (s->resync_mb_x + s->resync_mb_y * s->mb_width + mb_num > s->mb_num) { | |
891 | av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); | |
892 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
893 | s->mb_x, s->mb_y, part_a_error); | |
894 | return -1; | |
895 | } | |
896 | ||
897 | s->mb_num_left = mb_num; | |
898 | ||
899 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
900 | while (show_bits(&s->gb, 9) == 1) | |
901 | skip_bits(&s->gb, 9); | |
902 | if (get_bits_long(&s->gb, 19) != DC_MARKER) { | |
903 | av_log(s->avctx, AV_LOG_ERROR, | |
904 | "marker missing after first I partition at %d %d\n", | |
905 | s->mb_x, s->mb_y); | |
906 | return -1; | |
907 | } | |
908 | } else { | |
909 | while (show_bits(&s->gb, 10) == 1) | |
910 | skip_bits(&s->gb, 10); | |
911 | if (get_bits(&s->gb, 17) != MOTION_MARKER) { | |
912 | av_log(s->avctx, AV_LOG_ERROR, | |
913 | "marker missing after first P partition at %d %d\n", | |
914 | s->mb_x, s->mb_y); | |
915 | return -1; | |
916 | } | |
917 | } | |
918 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
919 | s->mb_x - 1, s->mb_y, part_a_end); | |
920 | ||
921 | if (mpeg4_decode_partition_b(s, mb_num) < 0) { | |
922 | if (s->pict_type == AV_PICTURE_TYPE_P) | |
923 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
924 | s->mb_x, s->mb_y, ER_DC_ERROR); | |
925 | return -1; | |
926 | } else { | |
927 | if (s->pict_type == AV_PICTURE_TYPE_P) | |
928 | ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, | |
929 | s->mb_x - 1, s->mb_y, ER_DC_END); | |
930 | } | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
935 | /** | |
936 | * Decode a block. | |
937 | * @return <0 if an error occurred | |
938 | */ | |
939 | static inline int mpeg4_decode_block(Mpeg4DecContext *ctx, int16_t *block, | |
940 | int n, int coded, int intra, int rvlc) | |
941 | { | |
942 | MpegEncContext *s = &ctx->m; | |
943 | int level, i, last, run, qmul, qadd; | |
944 | int av_uninit(dc_pred_dir); | |
945 | RLTable *rl; | |
946 | RL_VLC_ELEM *rl_vlc; | |
947 | const uint8_t *scan_table; | |
948 | ||
949 | // Note intra & rvlc should be optimized away if this is inlined | |
950 | ||
951 | if (intra) { | |
952 | if (ctx->use_intra_dc_vlc) { | |
953 | /* DC coef */ | |
954 | if (s->partitioned_frame) { | |
955 | level = s->dc_val[0][s->block_index[n]]; | |
956 | if (n < 4) | |
957 | level = FASTDIV((level + (s->y_dc_scale >> 1)), s->y_dc_scale); | |
958 | else | |
959 | level = FASTDIV((level + (s->c_dc_scale >> 1)), s->c_dc_scale); | |
960 | dc_pred_dir = (s->pred_dir_table[s->mb_x + s->mb_y * s->mb_stride] << n) & 32; | |
961 | } else { | |
962 | level = mpeg4_decode_dc(s, n, &dc_pred_dir); | |
963 | if (level < 0) | |
964 | return -1; | |
965 | } | |
966 | block[0] = level; | |
967 | i = 0; | |
968 | } else { | |
969 | i = -1; | |
970 | ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0); | |
971 | } | |
972 | if (!coded) | |
973 | goto not_coded; | |
974 | ||
975 | if (rvlc) { | |
976 | rl = &ff_rvlc_rl_intra; | |
977 | rl_vlc = ff_rvlc_rl_intra.rl_vlc[0]; | |
978 | } else { | |
979 | rl = &ff_mpeg4_rl_intra; | |
980 | rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; | |
981 | } | |
982 | if (s->ac_pred) { | |
983 | if (dc_pred_dir == 0) | |
984 | scan_table = s->intra_v_scantable.permutated; /* left */ | |
985 | else | |
986 | scan_table = s->intra_h_scantable.permutated; /* top */ | |
987 | } else { | |
988 | scan_table = s->intra_scantable.permutated; | |
989 | } | |
990 | qmul = 1; | |
991 | qadd = 0; | |
992 | } else { | |
993 | i = -1; | |
994 | if (!coded) { | |
995 | s->block_last_index[n] = i; | |
996 | return 0; | |
997 | } | |
998 | if (rvlc) | |
999 | rl = &ff_rvlc_rl_inter; | |
1000 | else | |
1001 | rl = &ff_h263_rl_inter; | |
1002 | ||
1003 | scan_table = s->intra_scantable.permutated; | |
1004 | ||
1005 | if (s->mpeg_quant) { | |
1006 | qmul = 1; | |
1007 | qadd = 0; | |
1008 | if (rvlc) | |
1009 | rl_vlc = ff_rvlc_rl_inter.rl_vlc[0]; | |
1010 | else | |
1011 | rl_vlc = ff_h263_rl_inter.rl_vlc[0]; | |
1012 | } else { | |
1013 | qmul = s->qscale << 1; | |
1014 | qadd = (s->qscale - 1) | 1; | |
1015 | if (rvlc) | |
1016 | rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale]; | |
1017 | else | |
1018 | rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale]; | |
1019 | } | |
1020 | } | |
1021 | { | |
1022 | OPEN_READER(re, &s->gb); | |
1023 | for (;;) { | |
1024 | UPDATE_CACHE(re, &s->gb); | |
1025 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); | |
1026 | if (level == 0) { | |
1027 | /* escape */ | |
1028 | if (rvlc) { | |
1029 | if (SHOW_UBITS(re, &s->gb, 1) == 0) { | |
1030 | av_log(s->avctx, AV_LOG_ERROR, | |
1031 | "1. marker bit missing in rvlc esc\n"); | |
1032 | return -1; | |
1033 | } | |
1034 | SKIP_CACHE(re, &s->gb, 1); | |
1035 | ||
1036 | last = SHOW_UBITS(re, &s->gb, 1); | |
1037 | SKIP_CACHE(re, &s->gb, 1); | |
1038 | run = SHOW_UBITS(re, &s->gb, 6); | |
1039 | SKIP_COUNTER(re, &s->gb, 1 + 1 + 6); | |
1040 | UPDATE_CACHE(re, &s->gb); | |
1041 | ||
1042 | if (SHOW_UBITS(re, &s->gb, 1) == 0) { | |
1043 | av_log(s->avctx, AV_LOG_ERROR, | |
1044 | "2. marker bit missing in rvlc esc\n"); | |
1045 | return -1; | |
1046 | } | |
1047 | SKIP_CACHE(re, &s->gb, 1); | |
1048 | ||
1049 | level = SHOW_UBITS(re, &s->gb, 11); | |
1050 | SKIP_CACHE(re, &s->gb, 11); | |
1051 | ||
1052 | if (SHOW_UBITS(re, &s->gb, 5) != 0x10) { | |
1053 | av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); | |
1054 | return -1; | |
1055 | } | |
1056 | SKIP_CACHE(re, &s->gb, 5); | |
1057 | ||
1058 | level = level * qmul + qadd; | |
1059 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
1060 | SKIP_COUNTER(re, &s->gb, 1 + 11 + 5 + 1); | |
1061 | ||
1062 | i += run + 1; | |
1063 | if (last) | |
1064 | i += 192; | |
1065 | } else { | |
1066 | int cache; | |
1067 | cache = GET_CACHE(re, &s->gb); | |
1068 | ||
1069 | if (IS_3IV1) | |
1070 | cache ^= 0xC0000000; | |
1071 | ||
1072 | if (cache & 0x80000000) { | |
1073 | if (cache & 0x40000000) { | |
1074 | /* third escape */ | |
1075 | SKIP_CACHE(re, &s->gb, 2); | |
1076 | last = SHOW_UBITS(re, &s->gb, 1); | |
1077 | SKIP_CACHE(re, &s->gb, 1); | |
1078 | run = SHOW_UBITS(re, &s->gb, 6); | |
1079 | SKIP_COUNTER(re, &s->gb, 2 + 1 + 6); | |
1080 | UPDATE_CACHE(re, &s->gb); | |
1081 | ||
1082 | if (IS_3IV1) { | |
1083 | level = SHOW_SBITS(re, &s->gb, 12); | |
1084 | LAST_SKIP_BITS(re, &s->gb, 12); | |
1085 | } else { | |
1086 | if (SHOW_UBITS(re, &s->gb, 1) == 0) { | |
1087 | av_log(s->avctx, AV_LOG_ERROR, | |
1088 | "1. marker bit missing in 3. esc\n"); | |
1089 | if (!(s->err_recognition & AV_EF_IGNORE_ERR)) | |
1090 | return -1; | |
1091 | } | |
1092 | SKIP_CACHE(re, &s->gb, 1); | |
1093 | ||
1094 | level = SHOW_SBITS(re, &s->gb, 12); | |
1095 | SKIP_CACHE(re, &s->gb, 12); | |
1096 | ||
1097 | if (SHOW_UBITS(re, &s->gb, 1) == 0) { | |
1098 | av_log(s->avctx, AV_LOG_ERROR, | |
1099 | "2. marker bit missing in 3. esc\n"); | |
1100 | if (!(s->err_recognition & AV_EF_IGNORE_ERR)) | |
1101 | return -1; | |
1102 | } | |
1103 | ||
1104 | SKIP_COUNTER(re, &s->gb, 1 + 12 + 1); | |
1105 | } | |
1106 | ||
1107 | #if 0 | |
1108 | if (s->error_recognition >= FF_ER_COMPLIANT) { | |
1109 | const int abs_level= FFABS(level); | |
1110 | if (abs_level<=MAX_LEVEL && run<=MAX_RUN) { | |
1111 | const int run1= run - rl->max_run[last][abs_level] - 1; | |
1112 | if (abs_level <= rl->max_level[last][run]) { | |
1113 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); | |
1114 | return -1; | |
1115 | } | |
1116 | if (s->error_recognition > FF_ER_COMPLIANT) { | |
1117 | if (abs_level <= rl->max_level[last][run]*2) { | |
1118 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); | |
1119 | return -1; | |
1120 | } | |
1121 | if (run1 >= 0 && abs_level <= rl->max_level[last][run1]) { | |
1122 | av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); | |
1123 | return -1; | |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | } | |
1128 | #endif | |
1129 | if (level > 0) | |
1130 | level = level * qmul + qadd; | |
1131 | else | |
1132 | level = level * qmul - qadd; | |
1133 | ||
1134 | if ((unsigned)(level + 2048) > 4095) { | |
1135 | if (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)) { | |
1136 | if (level > 2560 || level < -2560) { | |
1137 | av_log(s->avctx, AV_LOG_ERROR, | |
1138 | "|level| overflow in 3. esc, qp=%d\n", | |
1139 | s->qscale); | |
1140 | return -1; | |
1141 | } | |
1142 | } | |
1143 | level = level < 0 ? -2048 : 2047; | |
1144 | } | |
1145 | ||
1146 | i += run + 1; | |
1147 | if (last) | |
1148 | i += 192; | |
1149 | } else { | |
1150 | /* second escape */ | |
1151 | SKIP_BITS(re, &s->gb, 2); | |
1152 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); | |
1153 | i += run + rl->max_run[run >> 7][level / qmul] + 1; // FIXME opt indexing | |
1154 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
1155 | LAST_SKIP_BITS(re, &s->gb, 1); | |
1156 | } | |
1157 | } else { | |
1158 | /* first escape */ | |
1159 | SKIP_BITS(re, &s->gb, 1); | |
1160 | GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); | |
1161 | i += run; | |
1162 | level = level + rl->max_level[run >> 7][(run - 1) & 63] * qmul; // FIXME opt indexing | |
1163 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
1164 | LAST_SKIP_BITS(re, &s->gb, 1); | |
1165 | } | |
1166 | } | |
1167 | } else { | |
1168 | i += run; | |
1169 | level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); | |
1170 | LAST_SKIP_BITS(re, &s->gb, 1); | |
1171 | } | |
1172 | tprintf(s->avctx, "dct[%d][%d] = %- 4d end?:%d\n", scan_table[i&63]&7, scan_table[i&63] >> 3, level, i>62); | |
1173 | if (i > 62) { | |
1174 | i -= 192; | |
1175 | if (i & (~63)) { | |
1176 | av_log(s->avctx, AV_LOG_ERROR, | |
1177 | "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); | |
1178 | return -1; | |
1179 | } | |
1180 | ||
1181 | block[scan_table[i]] = level; | |
1182 | break; | |
1183 | } | |
1184 | ||
1185 | block[scan_table[i]] = level; | |
1186 | } | |
1187 | CLOSE_READER(re, &s->gb); | |
1188 | } | |
1189 | ||
1190 | not_coded: | |
1191 | if (intra) { | |
1192 | if (!ctx->use_intra_dc_vlc) { | |
1193 | block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0); | |
1194 | ||
1195 | i -= i >> 31; // if (i == -1) i = 0; | |
1196 | } | |
1197 | ||
1198 | ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); | |
1199 | if (s->ac_pred) | |
1200 | i = 63; // FIXME not optimal | |
1201 | } | |
1202 | s->block_last_index[n] = i; | |
1203 | return 0; | |
1204 | } | |
1205 | ||
1206 | /** | |
1207 | * decode partition C of one MB. | |
1208 | * @return <0 if an error occurred | |
1209 | */ | |
1210 | static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) | |
1211 | { | |
1212 | Mpeg4DecContext *ctx = (Mpeg4DecContext *)s; | |
1213 | int cbp, mb_type; | |
1214 | const int xy = s->mb_x + s->mb_y * s->mb_stride; | |
1215 | ||
1216 | mb_type = s->current_picture.mb_type[xy]; | |
1217 | cbp = s->cbp_table[xy]; | |
1218 | ||
1219 | ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold; | |
1220 | ||
1221 | if (s->current_picture.qscale_table[xy] != s->qscale) | |
1222 | ff_set_qscale(s, s->current_picture.qscale_table[xy]); | |
1223 | ||
1224 | if (s->pict_type == AV_PICTURE_TYPE_P || | |
1225 | s->pict_type == AV_PICTURE_TYPE_S) { | |
1226 | int i; | |
1227 | for (i = 0; i < 4; i++) { | |
1228 | s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0]; | |
1229 | s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1]; | |
1230 | } | |
1231 | s->mb_intra = IS_INTRA(mb_type); | |
1232 | ||
1233 | if (IS_SKIP(mb_type)) { | |
1234 | /* skip mb */ | |
1235 | for (i = 0; i < 6; i++) | |
1236 | s->block_last_index[i] = -1; | |
1237 | s->mv_dir = MV_DIR_FORWARD; | |
1238 | s->mv_type = MV_TYPE_16X16; | |
1239 | if (s->pict_type == AV_PICTURE_TYPE_S | |
1240 | && ctx->vol_sprite_usage == GMC_SPRITE) { | |
1241 | s->mcsel = 1; | |
1242 | s->mb_skipped = 0; | |
1243 | } else { | |
1244 | s->mcsel = 0; | |
1245 | s->mb_skipped = 1; | |
1246 | } | |
1247 | } else if (s->mb_intra) { | |
1248 | s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); | |
1249 | } else if (!s->mb_intra) { | |
1250 | // s->mcsel = 0; // FIXME do we need to init that? | |
1251 | ||
1252 | s->mv_dir = MV_DIR_FORWARD; | |
1253 | if (IS_8X8(mb_type)) { | |
1254 | s->mv_type = MV_TYPE_8X8; | |
1255 | } else { | |
1256 | s->mv_type = MV_TYPE_16X16; | |
1257 | } | |
1258 | } | |
1259 | } else { /* I-Frame */ | |
1260 | s->mb_intra = 1; | |
1261 | s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); | |
1262 | } | |
1263 | ||
1264 | if (!IS_SKIP(mb_type)) { | |
1265 | int i; | |
1266 | s->bdsp.clear_blocks(s->block[0]); | |
1267 | /* decode each block */ | |
1268 | for (i = 0; i < 6; i++) { | |
1269 | if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, s->mb_intra, ctx->rvlc) < 0) { | |
1270 | av_log(s->avctx, AV_LOG_ERROR, | |
1271 | "texture corrupted at %d %d %d\n", | |
1272 | s->mb_x, s->mb_y, s->mb_intra); | |
1273 | return -1; | |
1274 | } | |
1275 | cbp += cbp; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | /* per-MB end of slice check */ | |
1280 | if (--s->mb_num_left <= 0) { | |
1281 | if (mpeg4_is_resync(ctx)) | |
1282 | return SLICE_END; | |
1283 | else | |
1284 | return SLICE_NOEND; | |
1285 | } else { | |
1286 | if (mpeg4_is_resync(ctx)) { | |
1287 | const int delta = s->mb_x + 1 == s->mb_width ? 2 : 1; | |
1288 | if (s->cbp_table[xy + delta]) | |
1289 | return SLICE_END; | |
1290 | } | |
1291 | return SLICE_OK; | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64]) | |
1296 | { | |
1297 | Mpeg4DecContext *ctx = (Mpeg4DecContext *)s; | |
1298 | int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; | |
1299 | int16_t *mot_val; | |
1300 | static int8_t quant_tab[4] = { -1, -2, 1, 2 }; | |
1301 | const int xy = s->mb_x + s->mb_y * s->mb_stride; | |
1302 | ||
1303 | av_assert2(s->h263_pred); | |
1304 | ||
1305 | if (s->pict_type == AV_PICTURE_TYPE_P || | |
1306 | s->pict_type == AV_PICTURE_TYPE_S) { | |
1307 | do { | |
1308 | if (get_bits1(&s->gb)) { | |
1309 | /* skip mb */ | |
1310 | s->mb_intra = 0; | |
1311 | for (i = 0; i < 6; i++) | |
1312 | s->block_last_index[i] = -1; | |
1313 | s->mv_dir = MV_DIR_FORWARD; | |
1314 | s->mv_type = MV_TYPE_16X16; | |
1315 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
1316 | ctx->vol_sprite_usage == GMC_SPRITE) { | |
1317 | s->current_picture.mb_type[xy] = MB_TYPE_SKIP | | |
1318 | MB_TYPE_GMC | | |
1319 | MB_TYPE_16x16 | | |
1320 | MB_TYPE_L0; | |
1321 | s->mcsel = 1; | |
1322 | s->mv[0][0][0] = get_amv(ctx, 0); | |
1323 | s->mv[0][0][1] = get_amv(ctx, 1); | |
1324 | s->mb_skipped = 0; | |
1325 | } else { | |
1326 | s->current_picture.mb_type[xy] = MB_TYPE_SKIP | | |
1327 | MB_TYPE_16x16 | | |
1328 | MB_TYPE_L0; | |
1329 | s->mcsel = 0; | |
1330 | s->mv[0][0][0] = 0; | |
1331 | s->mv[0][0][1] = 0; | |
1332 | s->mb_skipped = 1; | |
1333 | } | |
1334 | goto end; | |
1335 | } | |
1336 | cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); | |
1337 | if (cbpc < 0) { | |
1338 | av_log(s->avctx, AV_LOG_ERROR, | |
1339 | "mcbpc damaged at %d %d\n", s->mb_x, s->mb_y); | |
1340 | return -1; | |
1341 | } | |
1342 | } while (cbpc == 20); | |
1343 | ||
1344 | s->bdsp.clear_blocks(s->block[0]); | |
1345 | dquant = cbpc & 8; | |
1346 | s->mb_intra = ((cbpc & 4) != 0); | |
1347 | if (s->mb_intra) | |
1348 | goto intra; | |
1349 | ||
1350 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
1351 | ctx->vol_sprite_usage == GMC_SPRITE && (cbpc & 16) == 0) | |
1352 | s->mcsel = get_bits1(&s->gb); | |
1353 | else | |
1354 | s->mcsel = 0; | |
1355 | cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; | |
1356 | ||
1357 | cbp = (cbpc & 3) | (cbpy << 2); | |
1358 | if (dquant) | |
1359 | ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); | |
1360 | if ((!s->progressive_sequence) && | |
1361 | (cbp || (s->workaround_bugs & FF_BUG_XVID_ILACE))) | |
1362 | s->interlaced_dct = get_bits1(&s->gb); | |
1363 | ||
1364 | s->mv_dir = MV_DIR_FORWARD; | |
1365 | if ((cbpc & 16) == 0) { | |
1366 | if (s->mcsel) { | |
1367 | s->current_picture.mb_type[xy] = MB_TYPE_GMC | | |
1368 | MB_TYPE_16x16 | | |
1369 | MB_TYPE_L0; | |
1370 | /* 16x16 global motion prediction */ | |
1371 | s->mv_type = MV_TYPE_16X16; | |
1372 | mx = get_amv(ctx, 0); | |
1373 | my = get_amv(ctx, 1); | |
1374 | s->mv[0][0][0] = mx; | |
1375 | s->mv[0][0][1] = my; | |
1376 | } else if ((!s->progressive_sequence) && get_bits1(&s->gb)) { | |
1377 | s->current_picture.mb_type[xy] = MB_TYPE_16x8 | | |
1378 | MB_TYPE_L0 | | |
1379 | MB_TYPE_INTERLACED; | |
1380 | /* 16x8 field motion prediction */ | |
1381 | s->mv_type = MV_TYPE_FIELD; | |
1382 | ||
1383 | s->field_select[0][0] = get_bits1(&s->gb); | |
1384 | s->field_select[0][1] = get_bits1(&s->gb); | |
1385 | ||
1386 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); | |
1387 | ||
1388 | for (i = 0; i < 2; i++) { | |
1389 | mx = ff_h263_decode_motion(s, pred_x, s->f_code); | |
1390 | if (mx >= 0xffff) | |
1391 | return -1; | |
1392 | ||
1393 | my = ff_h263_decode_motion(s, pred_y / 2, s->f_code); | |
1394 | if (my >= 0xffff) | |
1395 | return -1; | |
1396 | ||
1397 | s->mv[0][i][0] = mx; | |
1398 | s->mv[0][i][1] = my; | |
1399 | } | |
1400 | } else { | |
1401 | s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; | |
1402 | /* 16x16 motion prediction */ | |
1403 | s->mv_type = MV_TYPE_16X16; | |
1404 | ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); | |
1405 | mx = ff_h263_decode_motion(s, pred_x, s->f_code); | |
1406 | ||
1407 | if (mx >= 0xffff) | |
1408 | return -1; | |
1409 | ||
1410 | my = ff_h263_decode_motion(s, pred_y, s->f_code); | |
1411 | ||
1412 | if (my >= 0xffff) | |
1413 | return -1; | |
1414 | s->mv[0][0][0] = mx; | |
1415 | s->mv[0][0][1] = my; | |
1416 | } | |
1417 | } else { | |
1418 | s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; | |
1419 | s->mv_type = MV_TYPE_8X8; | |
1420 | for (i = 0; i < 4; i++) { | |
1421 | mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); | |
1422 | mx = ff_h263_decode_motion(s, pred_x, s->f_code); | |
1423 | if (mx >= 0xffff) | |
1424 | return -1; | |
1425 | ||
1426 | my = ff_h263_decode_motion(s, pred_y, s->f_code); | |
1427 | if (my >= 0xffff) | |
1428 | return -1; | |
1429 | s->mv[0][i][0] = mx; | |
1430 | s->mv[0][i][1] = my; | |
1431 | mot_val[0] = mx; | |
1432 | mot_val[1] = my; | |
1433 | } | |
1434 | } | |
1435 | } else if (s->pict_type == AV_PICTURE_TYPE_B) { | |
1436 | int modb1; // first bit of modb | |
1437 | int modb2; // second bit of modb | |
1438 | int mb_type; | |
1439 | ||
1440 | s->mb_intra = 0; // B-frames never contain intra blocks | |
1441 | s->mcsel = 0; // ... true gmc blocks | |
1442 | ||
1443 | if (s->mb_x == 0) { | |
1444 | for (i = 0; i < 2; i++) { | |
1445 | s->last_mv[i][0][0] = | |
1446 | s->last_mv[i][0][1] = | |
1447 | s->last_mv[i][1][0] = | |
1448 | s->last_mv[i][1][1] = 0; | |
1449 | } | |
1450 | ||
1451 | ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0); | |
1452 | } | |
1453 | ||
1454 | /* if we skipped it in the future P Frame than skip it now too */ | |
1455 | s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC | |
1456 | ||
1457 | if (s->mb_skipped) { | |
1458 | /* skip mb */ | |
1459 | for (i = 0; i < 6; i++) | |
1460 | s->block_last_index[i] = -1; | |
1461 | ||
1462 | s->mv_dir = MV_DIR_FORWARD; | |
1463 | s->mv_type = MV_TYPE_16X16; | |
1464 | s->mv[0][0][0] = | |
1465 | s->mv[0][0][1] = | |
1466 | s->mv[1][0][0] = | |
1467 | s->mv[1][0][1] = 0; | |
1468 | s->current_picture.mb_type[xy] = MB_TYPE_SKIP | | |
1469 | MB_TYPE_16x16 | | |
1470 | MB_TYPE_L0; | |
1471 | goto end; | |
1472 | } | |
1473 | ||
1474 | modb1 = get_bits1(&s->gb); | |
1475 | if (modb1) { | |
1476 | // like MB_TYPE_B_DIRECT but no vectors coded | |
1477 | mb_type = MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; | |
1478 | cbp = 0; | |
1479 | } else { | |
1480 | modb2 = get_bits1(&s->gb); | |
1481 | mb_type = get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); | |
1482 | if (mb_type < 0) { | |
1483 | av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n"); | |
1484 | return -1; | |
1485 | } | |
1486 | mb_type = mb_type_b_map[mb_type]; | |
1487 | if (modb2) { | |
1488 | cbp = 0; | |
1489 | } else { | |
1490 | s->bdsp.clear_blocks(s->block[0]); | |
1491 | cbp = get_bits(&s->gb, 6); | |
1492 | } | |
1493 | ||
1494 | if ((!IS_DIRECT(mb_type)) && cbp) { | |
1495 | if (get_bits1(&s->gb)) | |
1496 | ff_set_qscale(s, s->qscale + get_bits1(&s->gb) * 4 - 2); | |
1497 | } | |
1498 | ||
1499 | if (!s->progressive_sequence) { | |
1500 | if (cbp) | |
1501 | s->interlaced_dct = get_bits1(&s->gb); | |
1502 | ||
1503 | if (!IS_DIRECT(mb_type) && get_bits1(&s->gb)) { | |
1504 | mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; | |
1505 | mb_type &= ~MB_TYPE_16x16; | |
1506 | ||
1507 | if (USES_LIST(mb_type, 0)) { | |
1508 | s->field_select[0][0] = get_bits1(&s->gb); | |
1509 | s->field_select[0][1] = get_bits1(&s->gb); | |
1510 | } | |
1511 | if (USES_LIST(mb_type, 1)) { | |
1512 | s->field_select[1][0] = get_bits1(&s->gb); | |
1513 | s->field_select[1][1] = get_bits1(&s->gb); | |
1514 | } | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | s->mv_dir = 0; | |
1519 | if ((mb_type & (MB_TYPE_DIRECT2 | MB_TYPE_INTERLACED)) == 0) { | |
1520 | s->mv_type = MV_TYPE_16X16; | |
1521 | ||
1522 | if (USES_LIST(mb_type, 0)) { | |
1523 | s->mv_dir = MV_DIR_FORWARD; | |
1524 | ||
1525 | mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code); | |
1526 | my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); | |
1527 | s->last_mv[0][1][0] = | |
1528 | s->last_mv[0][0][0] = | |
1529 | s->mv[0][0][0] = mx; | |
1530 | s->last_mv[0][1][1] = | |
1531 | s->last_mv[0][0][1] = | |
1532 | s->mv[0][0][1] = my; | |
1533 | } | |
1534 | ||
1535 | if (USES_LIST(mb_type, 1)) { | |
1536 | s->mv_dir |= MV_DIR_BACKWARD; | |
1537 | ||
1538 | mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code); | |
1539 | my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); | |
1540 | s->last_mv[1][1][0] = | |
1541 | s->last_mv[1][0][0] = | |
1542 | s->mv[1][0][0] = mx; | |
1543 | s->last_mv[1][1][1] = | |
1544 | s->last_mv[1][0][1] = | |
1545 | s->mv[1][0][1] = my; | |
1546 | } | |
1547 | } else if (!IS_DIRECT(mb_type)) { | |
1548 | s->mv_type = MV_TYPE_FIELD; | |
1549 | ||
1550 | if (USES_LIST(mb_type, 0)) { | |
1551 | s->mv_dir = MV_DIR_FORWARD; | |
1552 | ||
1553 | for (i = 0; i < 2; i++) { | |
1554 | mx = ff_h263_decode_motion(s, s->last_mv[0][i][0], s->f_code); | |
1555 | my = ff_h263_decode_motion(s, s->last_mv[0][i][1] / 2, s->f_code); | |
1556 | s->last_mv[0][i][0] = | |
1557 | s->mv[0][i][0] = mx; | |
1558 | s->last_mv[0][i][1] = (s->mv[0][i][1] = my) * 2; | |
1559 | } | |
1560 | } | |
1561 | ||
1562 | if (USES_LIST(mb_type, 1)) { | |
1563 | s->mv_dir |= MV_DIR_BACKWARD; | |
1564 | ||
1565 | for (i = 0; i < 2; i++) { | |
1566 | mx = ff_h263_decode_motion(s, s->last_mv[1][i][0], s->b_code); | |
1567 | my = ff_h263_decode_motion(s, s->last_mv[1][i][1] / 2, s->b_code); | |
1568 | s->last_mv[1][i][0] = | |
1569 | s->mv[1][i][0] = mx; | |
1570 | s->last_mv[1][i][1] = (s->mv[1][i][1] = my) * 2; | |
1571 | } | |
1572 | } | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | if (IS_DIRECT(mb_type)) { | |
1577 | if (IS_SKIP(mb_type)) { | |
1578 | mx = | |
1579 | my = 0; | |
1580 | } else { | |
1581 | mx = ff_h263_decode_motion(s, 0, 1); | |
1582 | my = ff_h263_decode_motion(s, 0, 1); | |
1583 | } | |
1584 | ||
1585 | s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; | |
1586 | mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); | |
1587 | } | |
1588 | s->current_picture.mb_type[xy] = mb_type; | |
1589 | } else { /* I-Frame */ | |
1590 | do { | |
1591 | cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); | |
1592 | if (cbpc < 0) { | |
1593 | av_log(s->avctx, AV_LOG_ERROR, | |
1594 | "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); | |
1595 | return -1; | |
1596 | } | |
1597 | } while (cbpc == 8); | |
1598 | ||
1599 | dquant = cbpc & 4; | |
1600 | s->mb_intra = 1; | |
1601 | ||
1602 | intra: | |
1603 | s->ac_pred = get_bits1(&s->gb); | |
1604 | if (s->ac_pred) | |
1605 | s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; | |
1606 | else | |
1607 | s->current_picture.mb_type[xy] = MB_TYPE_INTRA; | |
1608 | ||
1609 | cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); | |
1610 | if (cbpy < 0) { | |
1611 | av_log(s->avctx, AV_LOG_ERROR, | |
1612 | "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); | |
1613 | return -1; | |
1614 | } | |
1615 | cbp = (cbpc & 3) | (cbpy << 2); | |
1616 | ||
1617 | ctx->use_intra_dc_vlc = s->qscale < ctx->intra_dc_threshold; | |
1618 | ||
1619 | if (dquant) | |
1620 | ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); | |
1621 | ||
1622 | if (!s->progressive_sequence) | |
1623 | s->interlaced_dct = get_bits1(&s->gb); | |
1624 | ||
1625 | s->bdsp.clear_blocks(s->block[0]); | |
1626 | /* decode each block */ | |
1627 | for (i = 0; i < 6; i++) { | |
1628 | if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 1, 0) < 0) | |
1629 | return -1; | |
1630 | cbp += cbp; | |
1631 | } | |
1632 | goto end; | |
1633 | } | |
1634 | ||
1635 | /* decode each block */ | |
1636 | for (i = 0; i < 6; i++) { | |
1637 | if (mpeg4_decode_block(ctx, block[i], i, cbp & 32, 0, 0) < 0) | |
1638 | return -1; | |
1639 | cbp += cbp; | |
1640 | } | |
1641 | ||
1642 | end: | |
1643 | /* per-MB end of slice check */ | |
1644 | if (s->codec_id == AV_CODEC_ID_MPEG4) { | |
1645 | int next = mpeg4_is_resync(ctx); | |
1646 | if (next) { | |
1647 | if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) { | |
1648 | return -1; | |
1649 | } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next) | |
1650 | return SLICE_END; | |
1651 | ||
1652 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
1653 | const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; | |
1654 | ff_thread_await_progress(&s->next_picture_ptr->tf, | |
1655 | (s->mb_x + delta >= s->mb_width) | |
1656 | ? FFMIN(s->mb_y + 1, s->mb_height - 1) | |
1657 | : s->mb_y, 0); | |
1658 | if (s->next_picture.mbskip_table[xy + delta]) | |
1659 | return SLICE_OK; | |
1660 | } | |
1661 | ||
1662 | return SLICE_END; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | return SLICE_OK; | |
1667 | } | |
1668 | ||
1669 | static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb) | |
1670 | { | |
1671 | int hours, minutes, seconds; | |
1672 | ||
1673 | if (!show_bits(gb, 23)) { | |
1674 | av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n"); | |
1675 | return -1; | |
1676 | } | |
1677 | ||
1678 | hours = get_bits(gb, 5); | |
1679 | minutes = get_bits(gb, 6); | |
1680 | skip_bits1(gb); | |
1681 | seconds = get_bits(gb, 6); | |
1682 | ||
1683 | s->time_base = seconds + 60*(minutes + 60*hours); | |
1684 | ||
1685 | skip_bits1(gb); | |
1686 | skip_bits1(gb); | |
1687 | ||
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb) | |
1692 | { | |
1693 | ||
1694 | s->avctx->profile = get_bits(gb, 4); | |
1695 | s->avctx->level = get_bits(gb, 4); | |
1696 | ||
1697 | // for Simple profile, level 0 | |
1698 | if (s->avctx->profile == 0 && s->avctx->level == 8) { | |
1699 | s->avctx->level = 0; | |
1700 | } | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
1705 | static int decode_vol_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
1706 | { | |
1707 | MpegEncContext *s = &ctx->m; | |
1708 | int width, height, vo_ver_id; | |
1709 | ||
1710 | /* vol header */ | |
1711 | skip_bits(gb, 1); /* random access */ | |
1712 | s->vo_type = get_bits(gb, 8); | |
1713 | if (get_bits1(gb) != 0) { /* is_ol_id */ | |
1714 | vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ | |
1715 | skip_bits(gb, 3); /* vo_priority */ | |
1716 | } else { | |
1717 | vo_ver_id = 1; | |
1718 | } | |
1719 | s->aspect_ratio_info = get_bits(gb, 4); | |
1720 | if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) { | |
1721 | s->avctx->sample_aspect_ratio.num = get_bits(gb, 8); // par_width | |
1722 | s->avctx->sample_aspect_ratio.den = get_bits(gb, 8); // par_height | |
1723 | } else { | |
1724 | s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[s->aspect_ratio_info]; | |
1725 | } | |
1726 | ||
1727 | if ((ctx->vol_control_parameters = get_bits1(gb))) { /* vol control parameter */ | |
1728 | int chroma_format = get_bits(gb, 2); | |
1729 | if (chroma_format != CHROMA_420) | |
1730 | av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); | |
1731 | ||
1732 | s->low_delay = get_bits1(gb); | |
1733 | if (get_bits1(gb)) { /* vbv parameters */ | |
1734 | get_bits(gb, 15); /* first_half_bitrate */ | |
1735 | skip_bits1(gb); /* marker */ | |
1736 | get_bits(gb, 15); /* latter_half_bitrate */ | |
1737 | skip_bits1(gb); /* marker */ | |
1738 | get_bits(gb, 15); /* first_half_vbv_buffer_size */ | |
1739 | skip_bits1(gb); /* marker */ | |
1740 | get_bits(gb, 3); /* latter_half_vbv_buffer_size */ | |
1741 | get_bits(gb, 11); /* first_half_vbv_occupancy */ | |
1742 | skip_bits1(gb); /* marker */ | |
1743 | get_bits(gb, 15); /* latter_half_vbv_occupancy */ | |
1744 | skip_bits1(gb); /* marker */ | |
1745 | } | |
1746 | } else { | |
1747 | /* is setting low delay flag only once the smartest thing to do? | |
1748 | * low delay detection won't be overridden. */ | |
1749 | if (s->picture_number == 0) | |
1750 | s->low_delay = 0; | |
1751 | } | |
1752 | ||
1753 | ctx->shape = get_bits(gb, 2); /* vol shape */ | |
1754 | if (ctx->shape != RECT_SHAPE) | |
1755 | av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); | |
1756 | if (ctx->shape == GRAY_SHAPE && vo_ver_id != 1) { | |
1757 | av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n"); | |
1758 | skip_bits(gb, 4); /* video_object_layer_shape_extension */ | |
1759 | } | |
1760 | ||
1761 | check_marker(gb, "before time_increment_resolution"); | |
1762 | ||
f6fa7814 DM |
1763 | s->avctx->framerate.num = get_bits(gb, 16); |
1764 | if (!s->avctx->framerate.num) { | |
1765 | av_log(s->avctx, AV_LOG_ERROR, "framerate==0\n"); | |
1766 | return AVERROR_INVALIDDATA; | |
2ba45a60 DM |
1767 | } |
1768 | ||
f6fa7814 | 1769 | ctx->time_increment_bits = av_log2(s->avctx->framerate.num - 1) + 1; |
2ba45a60 DM |
1770 | if (ctx->time_increment_bits < 1) |
1771 | ctx->time_increment_bits = 1; | |
1772 | ||
1773 | check_marker(gb, "before fixed_vop_rate"); | |
1774 | ||
1775 | if (get_bits1(gb) != 0) /* fixed_vop_rate */ | |
f6fa7814 | 1776 | s->avctx->framerate.den = get_bits(gb, ctx->time_increment_bits); |
2ba45a60 | 1777 | else |
f6fa7814 DM |
1778 | s->avctx->framerate.den = 1; |
1779 | ||
1780 | s->avctx->time_base = av_inv_q(av_mul_q(s->avctx->framerate, (AVRational){s->avctx->ticks_per_frame, 1})); | |
2ba45a60 DM |
1781 | |
1782 | ctx->t_frame = 0; | |
1783 | ||
1784 | if (ctx->shape != BIN_ONLY_SHAPE) { | |
1785 | if (ctx->shape == RECT_SHAPE) { | |
1786 | check_marker(gb, "before width"); | |
1787 | width = get_bits(gb, 13); | |
1788 | check_marker(gb, "before height"); | |
1789 | height = get_bits(gb, 13); | |
1790 | check_marker(gb, "after height"); | |
1791 | if (width && height && /* they should be non zero but who knows */ | |
1792 | !(s->width && s->codec_tag == AV_RL32("MP4S"))) { | |
1793 | if (s->width && s->height && | |
1794 | (s->width != width || s->height != height)) | |
1795 | s->context_reinit = 1; | |
1796 | s->width = width; | |
1797 | s->height = height; | |
1798 | } | |
1799 | } | |
1800 | ||
1801 | s->progressive_sequence = | |
1802 | s->progressive_frame = get_bits1(gb) ^ 1; | |
1803 | s->interlaced_dct = 0; | |
1804 | if (!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) | |
1805 | av_log(s->avctx, AV_LOG_INFO, /* OBMC Disable */ | |
1806 | "MPEG4 OBMC not supported (very likely buggy encoder)\n"); | |
1807 | if (vo_ver_id == 1) | |
1808 | ctx->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ | |
1809 | else | |
1810 | ctx->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ | |
1811 | ||
1812 | if (ctx->vol_sprite_usage == STATIC_SPRITE) | |
1813 | av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); | |
1814 | if (ctx->vol_sprite_usage == STATIC_SPRITE || | |
1815 | ctx->vol_sprite_usage == GMC_SPRITE) { | |
1816 | if (ctx->vol_sprite_usage == STATIC_SPRITE) { | |
1817 | skip_bits(gb, 13); // sprite_width | |
1818 | skip_bits1(gb); /* marker */ | |
1819 | skip_bits(gb, 13); // sprite_height | |
1820 | skip_bits1(gb); /* marker */ | |
1821 | skip_bits(gb, 13); // sprite_left | |
1822 | skip_bits1(gb); /* marker */ | |
1823 | skip_bits(gb, 13); // sprite_top | |
1824 | skip_bits1(gb); /* marker */ | |
1825 | } | |
1826 | ctx->num_sprite_warping_points = get_bits(gb, 6); | |
1827 | if (ctx->num_sprite_warping_points > 3) { | |
1828 | av_log(s->avctx, AV_LOG_ERROR, | |
1829 | "%d sprite_warping_points\n", | |
1830 | ctx->num_sprite_warping_points); | |
1831 | ctx->num_sprite_warping_points = 0; | |
f6fa7814 | 1832 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
1833 | } |
1834 | s->sprite_warping_accuracy = get_bits(gb, 2); | |
1835 | ctx->sprite_brightness_change = get_bits1(gb); | |
1836 | if (ctx->vol_sprite_usage == STATIC_SPRITE) | |
1837 | skip_bits1(gb); // low_latency_sprite | |
1838 | } | |
1839 | // FIXME sadct disable bit if verid!=1 && shape not rect | |
1840 | ||
1841 | if (get_bits1(gb) == 1) { /* not_8_bit */ | |
1842 | s->quant_precision = get_bits(gb, 4); /* quant_precision */ | |
1843 | if (get_bits(gb, 4) != 8) /* bits_per_pixel */ | |
1844 | av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); | |
1845 | if (s->quant_precision != 5) | |
1846 | av_log(s->avctx, AV_LOG_ERROR, | |
1847 | "quant precision %d\n", s->quant_precision); | |
1848 | if (s->quant_precision<3 || s->quant_precision>9) { | |
1849 | s->quant_precision = 5; | |
1850 | } | |
1851 | } else { | |
1852 | s->quant_precision = 5; | |
1853 | } | |
1854 | ||
1855 | // FIXME a bunch of grayscale shape things | |
1856 | ||
1857 | if ((s->mpeg_quant = get_bits1(gb))) { /* vol_quant_type */ | |
1858 | int i, v; | |
1859 | ||
1860 | /* load default matrixes */ | |
1861 | for (i = 0; i < 64; i++) { | |
1862 | int j = s->idsp.idct_permutation[i]; | |
1863 | v = ff_mpeg4_default_intra_matrix[i]; | |
1864 | s->intra_matrix[j] = v; | |
1865 | s->chroma_intra_matrix[j] = v; | |
1866 | ||
1867 | v = ff_mpeg4_default_non_intra_matrix[i]; | |
1868 | s->inter_matrix[j] = v; | |
1869 | s->chroma_inter_matrix[j] = v; | |
1870 | } | |
1871 | ||
1872 | /* load custom intra matrix */ | |
1873 | if (get_bits1(gb)) { | |
1874 | int last = 0; | |
1875 | for (i = 0; i < 64; i++) { | |
1876 | int j; | |
1877 | v = get_bits(gb, 8); | |
1878 | if (v == 0) | |
1879 | break; | |
1880 | ||
1881 | last = v; | |
1882 | j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
1883 | s->intra_matrix[j] = last; | |
1884 | s->chroma_intra_matrix[j] = last; | |
1885 | } | |
1886 | ||
1887 | /* replicate last value */ | |
1888 | for (; i < 64; i++) { | |
1889 | int j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
1890 | s->intra_matrix[j] = last; | |
1891 | s->chroma_intra_matrix[j] = last; | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | /* load custom non intra matrix */ | |
1896 | if (get_bits1(gb)) { | |
1897 | int last = 0; | |
1898 | for (i = 0; i < 64; i++) { | |
1899 | int j; | |
1900 | v = get_bits(gb, 8); | |
1901 | if (v == 0) | |
1902 | break; | |
1903 | ||
1904 | last = v; | |
1905 | j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
1906 | s->inter_matrix[j] = v; | |
1907 | s->chroma_inter_matrix[j] = v; | |
1908 | } | |
1909 | ||
1910 | /* replicate last value */ | |
1911 | for (; i < 64; i++) { | |
1912 | int j = s->idsp.idct_permutation[ff_zigzag_direct[i]]; | |
1913 | s->inter_matrix[j] = last; | |
1914 | s->chroma_inter_matrix[j] = last; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | // FIXME a bunch of grayscale shape things | |
1919 | } | |
1920 | ||
1921 | if (vo_ver_id != 1) | |
1922 | s->quarter_sample = get_bits1(gb); | |
1923 | else | |
1924 | s->quarter_sample = 0; | |
1925 | ||
1926 | if (get_bits_left(gb) < 4) { | |
1927 | av_log(s->avctx, AV_LOG_ERROR, "VOL Header truncated\n"); | |
1928 | return AVERROR_INVALIDDATA; | |
1929 | } | |
1930 | ||
1931 | if (!get_bits1(gb)) { | |
1932 | int pos = get_bits_count(gb); | |
1933 | int estimation_method = get_bits(gb, 2); | |
1934 | if (estimation_method < 2) { | |
1935 | if (!get_bits1(gb)) { | |
1936 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* opaque */ | |
1937 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* transparent */ | |
1938 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_cae */ | |
1939 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* inter_cae */ | |
1940 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* no_update */ | |
1941 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* upampling */ | |
1942 | } | |
1943 | if (!get_bits1(gb)) { | |
1944 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* intra_blocks */ | |
1945 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter_blocks */ | |
1946 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* inter4v_blocks */ | |
1947 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* not coded blocks */ | |
1948 | } | |
1949 | if (!check_marker(gb, "in complexity estimation part 1")) { | |
1950 | skip_bits_long(gb, pos - get_bits_count(gb)); | |
1951 | goto no_cplx_est; | |
1952 | } | |
1953 | if (!get_bits1(gb)) { | |
1954 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_coeffs */ | |
1955 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* dct_lines */ | |
1956 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* vlc_syms */ | |
1957 | ctx->cplx_estimation_trash_i += 4 * get_bits1(gb); /* vlc_bits */ | |
1958 | } | |
1959 | if (!get_bits1(gb)) { | |
1960 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* apm */ | |
1961 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* npm */ | |
1962 | ctx->cplx_estimation_trash_b += 8 * get_bits1(gb); /* interpolate_mc_q */ | |
1963 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* forwback_mc_q */ | |
1964 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel2 */ | |
1965 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* halfpel4 */ | |
1966 | } | |
1967 | if (!check_marker(gb, "in complexity estimation part 2")) { | |
1968 | skip_bits_long(gb, pos - get_bits_count(gb)); | |
1969 | goto no_cplx_est; | |
1970 | } | |
1971 | if (estimation_method == 1) { | |
1972 | ctx->cplx_estimation_trash_i += 8 * get_bits1(gb); /* sadct */ | |
1973 | ctx->cplx_estimation_trash_p += 8 * get_bits1(gb); /* qpel */ | |
1974 | } | |
1975 | } else | |
1976 | av_log(s->avctx, AV_LOG_ERROR, | |
1977 | "Invalid Complexity estimation method %d\n", | |
1978 | estimation_method); | |
1979 | } else { | |
1980 | ||
1981 | no_cplx_est: | |
1982 | ctx->cplx_estimation_trash_i = | |
1983 | ctx->cplx_estimation_trash_p = | |
1984 | ctx->cplx_estimation_trash_b = 0; | |
1985 | } | |
1986 | ||
1987 | ctx->resync_marker = !get_bits1(gb); /* resync_marker_disabled */ | |
1988 | ||
1989 | s->data_partitioning = get_bits1(gb); | |
1990 | if (s->data_partitioning) | |
1991 | ctx->rvlc = get_bits1(gb); | |
1992 | ||
1993 | if (vo_ver_id != 1) { | |
1994 | ctx->new_pred = get_bits1(gb); | |
1995 | if (ctx->new_pred) { | |
1996 | av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n"); | |
1997 | skip_bits(gb, 2); /* requested upstream message type */ | |
1998 | skip_bits1(gb); /* newpred segment type */ | |
1999 | } | |
2000 | if (get_bits1(gb)) // reduced_res_vop | |
2001 | av_log(s->avctx, AV_LOG_ERROR, | |
2002 | "reduced resolution VOP not supported\n"); | |
2003 | } else { | |
2004 | ctx->new_pred = 0; | |
2005 | } | |
2006 | ||
2007 | ctx->scalability = get_bits1(gb); | |
2008 | ||
2009 | if (ctx->scalability) { | |
2010 | GetBitContext bak = *gb; | |
2011 | int h_sampling_factor_n; | |
2012 | int h_sampling_factor_m; | |
2013 | int v_sampling_factor_n; | |
2014 | int v_sampling_factor_m; | |
2015 | ||
2016 | skip_bits1(gb); // hierarchy_type | |
2017 | skip_bits(gb, 4); /* ref_layer_id */ | |
2018 | skip_bits1(gb); /* ref_layer_sampling_dir */ | |
2019 | h_sampling_factor_n = get_bits(gb, 5); | |
2020 | h_sampling_factor_m = get_bits(gb, 5); | |
2021 | v_sampling_factor_n = get_bits(gb, 5); | |
2022 | v_sampling_factor_m = get_bits(gb, 5); | |
2023 | ctx->enhancement_type = get_bits1(gb); | |
2024 | ||
2025 | if (h_sampling_factor_n == 0 || h_sampling_factor_m == 0 || | |
2026 | v_sampling_factor_n == 0 || v_sampling_factor_m == 0) { | |
2027 | /* illegal scalability header (VERY broken encoder), | |
2028 | * trying to workaround */ | |
2029 | ctx->scalability = 0; | |
2030 | *gb = bak; | |
2031 | } else | |
2032 | av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n"); | |
2033 | ||
2034 | // bin shape stuff FIXME | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | if (s->avctx->debug&FF_DEBUG_PICT_INFO) { | |
2039 | av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, %s%s%s%s\n", | |
f6fa7814 | 2040 | s->avctx->framerate.den, s->avctx->framerate.num, |
2ba45a60 DM |
2041 | ctx->time_increment_bits, |
2042 | s->quant_precision, | |
2043 | s->progressive_sequence, | |
2044 | ctx->scalability ? "scalability " :"" , s->quarter_sample ? "qpel " : "", | |
2045 | s->data_partitioning ? "partition " : "", ctx->rvlc ? "rvlc " : "" | |
2046 | ); | |
2047 | } | |
2048 | ||
2049 | return 0; | |
2050 | } | |
2051 | ||
2052 | /** | |
2053 | * Decode the user data stuff in the header. | |
2054 | * Also initializes divx/xvid/lavc_version/build. | |
2055 | */ | |
2056 | static int decode_user_data(Mpeg4DecContext *ctx, GetBitContext *gb) | |
2057 | { | |
2058 | MpegEncContext *s = &ctx->m; | |
2059 | char buf[256]; | |
2060 | int i; | |
2061 | int e; | |
2062 | int ver = 0, build = 0, ver2 = 0, ver3 = 0; | |
2063 | char last; | |
2064 | ||
2065 | for (i = 0; i < 255 && get_bits_count(gb) < gb->size_in_bits; i++) { | |
2066 | if (show_bits(gb, 23) == 0) | |
2067 | break; | |
2068 | buf[i] = get_bits(gb, 8); | |
2069 | } | |
2070 | buf[i] = 0; | |
2071 | ||
2072 | /* divx detection */ | |
2073 | e = sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); | |
2074 | if (e < 2) | |
2075 | e = sscanf(buf, "DivX%db%d%c", &ver, &build, &last); | |
2076 | if (e >= 2) { | |
2077 | ctx->divx_version = ver; | |
2078 | ctx->divx_build = build; | |
2079 | s->divx_packed = e == 3 && last == 'p'; | |
2080 | if (s->divx_packed && !ctx->showed_packed_warning) { | |
2081 | av_log(s->avctx, AV_LOG_INFO, "Video uses a non-standard and " | |
2082 | "wasteful way to store B-frames ('packed B-frames'). " | |
2083 | "Consider using a tool like VirtualDub or avidemux to fix it.\n"); | |
2084 | ctx->showed_packed_warning = 1; | |
2085 | } | |
2086 | } | |
2087 | ||
2088 | /* libavcodec detection */ | |
2089 | e = sscanf(buf, "FFmpe%*[^b]b%d", &build) + 3; | |
2090 | if (e != 4) | |
2091 | e = sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); | |
2092 | if (e != 4) { | |
2093 | e = sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3) + 1; | |
2094 | if (e > 1) | |
2095 | build = (ver << 16) + (ver2 << 8) + ver3; | |
2096 | } | |
2097 | if (e != 4) { | |
2098 | if (strcmp(buf, "ffmpeg") == 0) | |
2099 | ctx->lavc_build = 4600; | |
2100 | } | |
2101 | if (e == 4) | |
2102 | ctx->lavc_build = build; | |
2103 | ||
2104 | /* Xvid detection */ | |
2105 | e = sscanf(buf, "XviD%d", &build); | |
2106 | if (e == 1) | |
2107 | ctx->xvid_build = build; | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | int ff_mpeg4_workaround_bugs(AVCodecContext *avctx) | |
2113 | { | |
2114 | Mpeg4DecContext *ctx = avctx->priv_data; | |
2115 | MpegEncContext *s = &ctx->m; | |
2116 | ||
2117 | if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) { | |
2118 | if (s->stream_codec_tag == AV_RL32("XVID") || | |
2119 | s->codec_tag == AV_RL32("XVID") || | |
2120 | s->codec_tag == AV_RL32("XVIX") || | |
2121 | s->codec_tag == AV_RL32("RMP4") || | |
2122 | s->codec_tag == AV_RL32("ZMP4") || | |
2123 | s->codec_tag == AV_RL32("SIPP")) | |
2124 | ctx->xvid_build = 0; | |
2125 | } | |
2126 | ||
2127 | if (ctx->xvid_build == -1 && ctx->divx_version == -1 && ctx->lavc_build == -1) | |
2128 | if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 && | |
2129 | ctx->vol_control_parameters == 0) | |
2130 | ctx->divx_version = 400; // divx 4 | |
2131 | ||
2132 | if (ctx->xvid_build >= 0 && ctx->divx_version >= 0) { | |
2133 | ctx->divx_version = | |
2134 | ctx->divx_build = -1; | |
2135 | } | |
2136 | ||
2137 | if (s->workaround_bugs & FF_BUG_AUTODETECT) { | |
2138 | if (s->codec_tag == AV_RL32("XVIX")) | |
2139 | s->workaround_bugs |= FF_BUG_XVID_ILACE; | |
2140 | ||
2141 | if (s->codec_tag == AV_RL32("UMP4")) | |
2142 | s->workaround_bugs |= FF_BUG_UMP4; | |
2143 | ||
2144 | if (ctx->divx_version >= 500 && ctx->divx_build < 1814) | |
2145 | s->workaround_bugs |= FF_BUG_QPEL_CHROMA; | |
2146 | ||
2147 | if (ctx->divx_version > 502 && ctx->divx_build < 1814) | |
2148 | s->workaround_bugs |= FF_BUG_QPEL_CHROMA2; | |
2149 | ||
2150 | if (ctx->xvid_build <= 3U) | |
2151 | s->padding_bug_score = 256 * 256 * 256 * 64; | |
2152 | ||
2153 | if (ctx->xvid_build <= 1U) | |
2154 | s->workaround_bugs |= FF_BUG_QPEL_CHROMA; | |
2155 | ||
2156 | if (ctx->xvid_build <= 12U) | |
2157 | s->workaround_bugs |= FF_BUG_EDGE; | |
2158 | ||
2159 | if (ctx->xvid_build <= 32U) | |
2160 | s->workaround_bugs |= FF_BUG_DC_CLIP; | |
2161 | ||
2162 | #define SET_QPEL_FUNC(postfix1, postfix2) \ | |
2163 | s->qdsp.put_ ## postfix1 = ff_put_ ## postfix2; \ | |
2164 | s->qdsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2; \ | |
2165 | s->qdsp.avg_ ## postfix1 = ff_avg_ ## postfix2; | |
2166 | ||
2167 | if (ctx->lavc_build < 4653U) | |
2168 | s->workaround_bugs |= FF_BUG_STD_QPEL; | |
2169 | ||
2170 | if (ctx->lavc_build < 4655U) | |
2171 | s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE; | |
2172 | ||
2173 | if (ctx->lavc_build < 4670U) | |
2174 | s->workaround_bugs |= FF_BUG_EDGE; | |
2175 | ||
2176 | if (ctx->lavc_build <= 4712U) | |
2177 | s->workaround_bugs |= FF_BUG_DC_CLIP; | |
2178 | ||
2179 | if (ctx->divx_version >= 0) | |
2180 | s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE; | |
2181 | if (ctx->divx_version == 501 && ctx->divx_build == 20020416) | |
2182 | s->padding_bug_score = 256 * 256 * 256 * 64; | |
2183 | ||
2184 | if (ctx->divx_version < 500U) | |
2185 | s->workaround_bugs |= FF_BUG_EDGE; | |
2186 | ||
2187 | if (ctx->divx_version >= 0) | |
2188 | s->workaround_bugs |= FF_BUG_HPEL_CHROMA; | |
2189 | } | |
2190 | ||
2191 | if (s->workaround_bugs & FF_BUG_STD_QPEL) { | |
2192 | SET_QPEL_FUNC(qpel_pixels_tab[0][5], qpel16_mc11_old_c) | |
2193 | SET_QPEL_FUNC(qpel_pixels_tab[0][7], qpel16_mc31_old_c) | |
2194 | SET_QPEL_FUNC(qpel_pixels_tab[0][9], qpel16_mc12_old_c) | |
2195 | SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c) | |
2196 | SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c) | |
2197 | SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c) | |
2198 | ||
2199 | SET_QPEL_FUNC(qpel_pixels_tab[1][5], qpel8_mc11_old_c) | |
2200 | SET_QPEL_FUNC(qpel_pixels_tab[1][7], qpel8_mc31_old_c) | |
2201 | SET_QPEL_FUNC(qpel_pixels_tab[1][9], qpel8_mc12_old_c) | |
2202 | SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c) | |
2203 | SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c) | |
2204 | SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c) | |
2205 | } | |
2206 | ||
2207 | if (avctx->debug & FF_DEBUG_BUGS) | |
2208 | av_log(s->avctx, AV_LOG_DEBUG, | |
2209 | "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n", | |
2210 | s->workaround_bugs, ctx->lavc_build, ctx->xvid_build, | |
2211 | ctx->divx_version, ctx->divx_build, s->divx_packed ? "p" : ""); | |
2212 | ||
2213 | if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0 && | |
2214 | s->codec_id == AV_CODEC_ID_MPEG4 && | |
2215 | avctx->idct_algo == FF_IDCT_AUTO) { | |
2216 | avctx->idct_algo = FF_IDCT_XVID; | |
2217 | ff_mpv_idct_init(s); | |
2218 | return 1; | |
2219 | } | |
2220 | ||
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
2225 | { | |
2226 | MpegEncContext *s = &ctx->m; | |
2227 | int time_incr, time_increment; | |
2228 | int64_t pts; | |
2229 | ||
2230 | s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ | |
2231 | if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay && | |
2232 | ctx->vol_control_parameters == 0 && !(s->flags & CODEC_FLAG_LOW_DELAY)) { | |
2233 | av_log(s->avctx, AV_LOG_ERROR, "low_delay flag set incorrectly, clearing it\n"); | |
2234 | s->low_delay = 0; | |
2235 | } | |
2236 | ||
2237 | s->partitioned_frame = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B; | |
2238 | if (s->partitioned_frame) | |
2239 | s->decode_mb = mpeg4_decode_partitioned_mb; | |
2240 | else | |
2241 | s->decode_mb = mpeg4_decode_mb; | |
2242 | ||
2243 | time_incr = 0; | |
2244 | while (get_bits1(gb) != 0) | |
2245 | time_incr++; | |
2246 | ||
2247 | check_marker(gb, "before time_increment"); | |
2248 | ||
2249 | if (ctx->time_increment_bits == 0 || | |
2250 | !(show_bits(gb, ctx->time_increment_bits + 1) & 1)) { | |
2251 | av_log(s->avctx, AV_LOG_ERROR, | |
2252 | "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); | |
2253 | ||
2254 | for (ctx->time_increment_bits = 1; | |
2255 | ctx->time_increment_bits < 16; | |
2256 | ctx->time_increment_bits++) { | |
2257 | if (s->pict_type == AV_PICTURE_TYPE_P || | |
2258 | (s->pict_type == AV_PICTURE_TYPE_S && | |
2259 | ctx->vol_sprite_usage == GMC_SPRITE)) { | |
2260 | if ((show_bits(gb, ctx->time_increment_bits + 6) & 0x37) == 0x30) | |
2261 | break; | |
2262 | } else if ((show_bits(gb, ctx->time_increment_bits + 5) & 0x1F) == 0x18) | |
2263 | break; | |
2264 | } | |
2265 | ||
2266 | av_log(s->avctx, AV_LOG_ERROR, | |
2267 | "my guess is %d bits ;)\n", ctx->time_increment_bits); | |
f6fa7814 DM |
2268 | if (s->avctx->framerate.num && 4*s->avctx->framerate.num < 1<<ctx->time_increment_bits) { |
2269 | s->avctx->framerate.num = 1<<ctx->time_increment_bits; | |
2270 | s->avctx->time_base = av_inv_q(av_mul_q(s->avctx->framerate, (AVRational){s->avctx->ticks_per_frame, 1})); | |
2ba45a60 DM |
2271 | } |
2272 | } | |
2273 | ||
2274 | if (IS_3IV1) | |
2275 | time_increment = get_bits1(gb); // FIXME investigate further | |
2276 | else | |
2277 | time_increment = get_bits(gb, ctx->time_increment_bits); | |
2278 | ||
2279 | if (s->pict_type != AV_PICTURE_TYPE_B) { | |
2280 | s->last_time_base = s->time_base; | |
2281 | s->time_base += time_incr; | |
f6fa7814 | 2282 | s->time = s->time_base * s->avctx->framerate.num + time_increment; |
2ba45a60 DM |
2283 | if (s->workaround_bugs & FF_BUG_UMP4) { |
2284 | if (s->time < s->last_non_b_time) { | |
2285 | /* header is not mpeg-4-compatible, broken encoder, | |
2286 | * trying to workaround */ | |
2287 | s->time_base++; | |
f6fa7814 | 2288 | s->time += s->avctx->framerate.num; |
2ba45a60 DM |
2289 | } |
2290 | } | |
2291 | s->pp_time = s->time - s->last_non_b_time; | |
2292 | s->last_non_b_time = s->time; | |
2293 | } else { | |
f6fa7814 | 2294 | s->time = (s->last_time_base + time_incr) * s->avctx->framerate.num + time_increment; |
2ba45a60 DM |
2295 | s->pb_time = s->pp_time - (s->last_non_b_time - s->time); |
2296 | if (s->pp_time <= s->pb_time || | |
2297 | s->pp_time <= s->pp_time - s->pb_time || | |
2298 | s->pp_time <= 0) { | |
2299 | /* messed up order, maybe after seeking? skipping current b-frame */ | |
2300 | return FRAME_SKIPPED; | |
2301 | } | |
2302 | ff_mpeg4_init_direct_mv(s); | |
2303 | ||
2304 | if (ctx->t_frame == 0) | |
2305 | ctx->t_frame = s->pb_time; | |
2306 | if (ctx->t_frame == 0) | |
2307 | ctx->t_frame = 1; // 1/0 protection | |
2308 | s->pp_field_time = (ROUNDED_DIV(s->last_non_b_time, ctx->t_frame) - | |
2309 | ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2; | |
2310 | s->pb_field_time = (ROUNDED_DIV(s->time, ctx->t_frame) - | |
2311 | ROUNDED_DIV(s->last_non_b_time - s->pp_time, ctx->t_frame)) * 2; | |
2312 | if (s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) { | |
2313 | s->pb_field_time = 2; | |
2314 | s->pp_field_time = 4; | |
2315 | if (!s->progressive_sequence) | |
2316 | return FRAME_SKIPPED; | |
2317 | } | |
2318 | } | |
2319 | ||
f6fa7814 DM |
2320 | if (s->avctx->framerate.den) |
2321 | pts = ROUNDED_DIV(s->time, s->avctx->framerate.den); | |
2ba45a60 DM |
2322 | else |
2323 | pts = AV_NOPTS_VALUE; | |
2324 | if (s->avctx->debug&FF_DEBUG_PTS) | |
2325 | av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n", | |
2326 | pts); | |
2327 | ||
2328 | check_marker(gb, "before vop_coded"); | |
2329 | ||
2330 | /* vop coded */ | |
2331 | if (get_bits1(gb) != 1) { | |
2332 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) | |
2333 | av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n"); | |
2334 | return FRAME_SKIPPED; | |
2335 | } | |
2336 | if (ctx->new_pred) | |
2337 | decode_new_pred(ctx, gb); | |
2338 | ||
2339 | if (ctx->shape != BIN_ONLY_SHAPE && | |
2340 | (s->pict_type == AV_PICTURE_TYPE_P || | |
2341 | (s->pict_type == AV_PICTURE_TYPE_S && | |
2342 | ctx->vol_sprite_usage == GMC_SPRITE))) { | |
2343 | /* rounding type for motion estimation */ | |
2344 | s->no_rounding = get_bits1(gb); | |
2345 | } else { | |
2346 | s->no_rounding = 0; | |
2347 | } | |
2348 | // FIXME reduced res stuff | |
2349 | ||
2350 | if (ctx->shape != RECT_SHAPE) { | |
2351 | if (ctx->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { | |
2352 | skip_bits(gb, 13); /* width */ | |
2353 | skip_bits1(gb); /* marker */ | |
2354 | skip_bits(gb, 13); /* height */ | |
2355 | skip_bits1(gb); /* marker */ | |
2356 | skip_bits(gb, 13); /* hor_spat_ref */ | |
2357 | skip_bits1(gb); /* marker */ | |
2358 | skip_bits(gb, 13); /* ver_spat_ref */ | |
2359 | } | |
2360 | skip_bits1(gb); /* change_CR_disable */ | |
2361 | ||
2362 | if (get_bits1(gb) != 0) | |
2363 | skip_bits(gb, 8); /* constant_alpha_value */ | |
2364 | } | |
2365 | ||
2366 | // FIXME complexity estimation stuff | |
2367 | ||
2368 | if (ctx->shape != BIN_ONLY_SHAPE) { | |
2369 | skip_bits_long(gb, ctx->cplx_estimation_trash_i); | |
2370 | if (s->pict_type != AV_PICTURE_TYPE_I) | |
2371 | skip_bits_long(gb, ctx->cplx_estimation_trash_p); | |
2372 | if (s->pict_type == AV_PICTURE_TYPE_B) | |
2373 | skip_bits_long(gb, ctx->cplx_estimation_trash_b); | |
2374 | ||
2375 | if (get_bits_left(gb) < 3) { | |
2376 | av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n"); | |
f6fa7814 | 2377 | return AVERROR_INVALIDDATA; |
2ba45a60 DM |
2378 | } |
2379 | ctx->intra_dc_threshold = ff_mpeg4_dc_threshold[get_bits(gb, 3)]; | |
2380 | if (!s->progressive_sequence) { | |
2381 | s->top_field_first = get_bits1(gb); | |
2382 | s->alternate_scan = get_bits1(gb); | |
2383 | } else | |
2384 | s->alternate_scan = 0; | |
2385 | } | |
2386 | ||
2387 | if (s->alternate_scan) { | |
2388 | ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_alternate_vertical_scan); | |
2389 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_alternate_vertical_scan); | |
2390 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); | |
2391 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); | |
2392 | } else { | |
2393 | ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable, ff_zigzag_direct); | |
2394 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct); | |
2395 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); | |
2396 | ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); | |
2397 | } | |
2398 | ||
2399 | if (s->pict_type == AV_PICTURE_TYPE_S && | |
2400 | (ctx->vol_sprite_usage == STATIC_SPRITE || | |
2401 | ctx->vol_sprite_usage == GMC_SPRITE)) { | |
2402 | if (mpeg4_decode_sprite_trajectory(ctx, gb) < 0) | |
2403 | return AVERROR_INVALIDDATA; | |
2404 | if (ctx->sprite_brightness_change) | |
2405 | av_log(s->avctx, AV_LOG_ERROR, | |
2406 | "sprite_brightness_change not supported\n"); | |
2407 | if (ctx->vol_sprite_usage == STATIC_SPRITE) | |
2408 | av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); | |
2409 | } | |
2410 | ||
2411 | if (ctx->shape != BIN_ONLY_SHAPE) { | |
2412 | s->chroma_qscale = s->qscale = get_bits(gb, s->quant_precision); | |
2413 | if (s->qscale == 0) { | |
2414 | av_log(s->avctx, AV_LOG_ERROR, | |
2415 | "Error, header damaged or not MPEG4 header (qscale=0)\n"); | |
f6fa7814 | 2416 | return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then |
2ba45a60 DM |
2417 | } |
2418 | ||
2419 | if (s->pict_type != AV_PICTURE_TYPE_I) { | |
2420 | s->f_code = get_bits(gb, 3); /* fcode_for */ | |
2421 | if (s->f_code == 0) { | |
2422 | av_log(s->avctx, AV_LOG_ERROR, | |
2423 | "Error, header damaged or not MPEG4 header (f_code=0)\n"); | |
2424 | s->f_code = 1; | |
f6fa7814 | 2425 | return AVERROR_INVALIDDATA; // makes no sense to continue, as there is nothing left from the image then |
2ba45a60 DM |
2426 | } |
2427 | } else | |
2428 | s->f_code = 1; | |
2429 | ||
2430 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
2431 | s->b_code = get_bits(gb, 3); | |
2432 | if (s->b_code == 0) { | |
2433 | av_log(s->avctx, AV_LOG_ERROR, | |
2434 | "Error, header damaged or not MPEG4 header (b_code=0)\n"); | |
2435 | s->b_code=1; | |
f6fa7814 | 2436 | return AVERROR_INVALIDDATA; // makes no sense to continue, as the MV decoding will break very quickly |
2ba45a60 DM |
2437 | } |
2438 | } else | |
2439 | s->b_code = 1; | |
2440 | ||
2441 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { | |
2442 | av_log(s->avctx, AV_LOG_DEBUG, | |
2443 | "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", | |
2444 | s->qscale, s->f_code, s->b_code, | |
2445 | 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")), | |
2446 | gb->size_in_bits,s->progressive_sequence, s->alternate_scan, | |
2447 | s->top_field_first, s->quarter_sample ? "q" : "h", | |
2448 | s->data_partitioning, ctx->resync_marker, | |
2449 | ctx->num_sprite_warping_points, s->sprite_warping_accuracy, | |
2450 | 1 - s->no_rounding, s->vo_type, | |
2451 | ctx->vol_control_parameters ? " VOLC" : " ", ctx->intra_dc_threshold, | |
2452 | ctx->cplx_estimation_trash_i, ctx->cplx_estimation_trash_p, | |
2453 | ctx->cplx_estimation_trash_b, | |
2454 | s->time, | |
2455 | time_increment | |
2456 | ); | |
2457 | } | |
2458 | ||
2459 | if (!ctx->scalability) { | |
2460 | if (ctx->shape != RECT_SHAPE && s->pict_type != AV_PICTURE_TYPE_I) | |
2461 | skip_bits1(gb); // vop shape coding type | |
2462 | } else { | |
2463 | if (ctx->enhancement_type) { | |
2464 | int load_backward_shape = get_bits1(gb); | |
2465 | if (load_backward_shape) | |
2466 | av_log(s->avctx, AV_LOG_ERROR, | |
2467 | "load backward shape isn't supported\n"); | |
2468 | } | |
2469 | skip_bits(gb, 2); // ref_select_code | |
2470 | } | |
2471 | } | |
2472 | /* detect buggy encoders which don't set the low_delay flag | |
2473 | * (divx4/xvid/opendivx). Note we cannot detect divx5 without b-frames | |
2474 | * easily (although it's buggy too) */ | |
2475 | if (s->vo_type == 0 && ctx->vol_control_parameters == 0 && | |
2476 | ctx->divx_version == -1 && s->picture_number == 0) { | |
2477 | av_log(s->avctx, AV_LOG_WARNING, | |
2478 | "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); | |
2479 | s->low_delay = 1; | |
2480 | } | |
2481 | ||
2482 | s->picture_number++; // better than pic number==0 always ;) | |
2483 | ||
2484 | // FIXME add short header support | |
2485 | s->y_dc_scale_table = ff_mpeg4_y_dc_scale_table; | |
2486 | s->c_dc_scale_table = ff_mpeg4_c_dc_scale_table; | |
2487 | ||
2488 | if (s->workaround_bugs & FF_BUG_EDGE) { | |
2489 | s->h_edge_pos = s->width; | |
2490 | s->v_edge_pos = s->height; | |
2491 | } | |
2492 | return 0; | |
2493 | } | |
2494 | ||
2495 | /** | |
2496 | * Decode mpeg4 headers. | |
2497 | * @return <0 if no VOP found (or a damaged one) | |
2498 | * FRAME_SKIPPED if a not coded VOP is found | |
2499 | * 0 if a VOP is found | |
2500 | */ | |
2501 | int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb) | |
2502 | { | |
2503 | MpegEncContext *s = &ctx->m; | |
2504 | unsigned startcode, v; | |
f6fa7814 | 2505 | int ret; |
2ba45a60 DM |
2506 | |
2507 | /* search next start code */ | |
2508 | align_get_bits(gb); | |
2509 | ||
2510 | if (s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630) { | |
2511 | skip_bits(gb, 24); | |
2512 | if (get_bits(gb, 8) == 0xF0) | |
2513 | goto end; | |
2514 | } | |
2515 | ||
2516 | startcode = 0xff; | |
2517 | for (;;) { | |
2518 | if (get_bits_count(gb) >= gb->size_in_bits) { | |
2519 | if (gb->size_in_bits == 8 && | |
2520 | (ctx->divx_version >= 0 || ctx->xvid_build >= 0) || s->codec_tag == AV_RL32("QMP4")) { | |
2521 | av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits); | |
2522 | return FRAME_SKIPPED; // divx bug | |
2523 | } else | |
2524 | return -1; // end of stream | |
2525 | } | |
2526 | ||
2527 | /* use the bits after the test */ | |
2528 | v = get_bits(gb, 8); | |
2529 | startcode = ((startcode << 8) | v) & 0xffffffff; | |
2530 | ||
2531 | if ((startcode & 0xFFFFFF00) != 0x100) | |
2532 | continue; // no startcode | |
2533 | ||
2534 | if (s->avctx->debug & FF_DEBUG_STARTCODE) { | |
2535 | av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode); | |
2536 | if (startcode <= 0x11F) | |
2537 | av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); | |
2538 | else if (startcode <= 0x12F) | |
2539 | av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); | |
2540 | else if (startcode <= 0x13F) | |
2541 | av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); | |
2542 | else if (startcode <= 0x15F) | |
2543 | av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); | |
2544 | else if (startcode <= 0x1AF) | |
2545 | av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); | |
2546 | else if (startcode == 0x1B0) | |
2547 | av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); | |
2548 | else if (startcode == 0x1B1) | |
2549 | av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); | |
2550 | else if (startcode == 0x1B2) | |
2551 | av_log(s->avctx, AV_LOG_DEBUG, "User Data"); | |
2552 | else if (startcode == 0x1B3) | |
2553 | av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); | |
2554 | else if (startcode == 0x1B4) | |
2555 | av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); | |
2556 | else if (startcode == 0x1B5) | |
2557 | av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); | |
2558 | else if (startcode == 0x1B6) | |
2559 | av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); | |
2560 | else if (startcode == 0x1B7) | |
2561 | av_log(s->avctx, AV_LOG_DEBUG, "slice start"); | |
2562 | else if (startcode == 0x1B8) | |
2563 | av_log(s->avctx, AV_LOG_DEBUG, "extension start"); | |
2564 | else if (startcode == 0x1B9) | |
2565 | av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); | |
2566 | else if (startcode == 0x1BA) | |
2567 | av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); | |
2568 | else if (startcode == 0x1BB) | |
2569 | av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); | |
2570 | else if (startcode == 0x1BC) | |
2571 | av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); | |
2572 | else if (startcode == 0x1BD) | |
2573 | av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); | |
2574 | else if (startcode == 0x1BE) | |
2575 | av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); | |
2576 | else if (startcode == 0x1BF) | |
2577 | av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); | |
2578 | else if (startcode == 0x1C0) | |
2579 | av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); | |
2580 | else if (startcode == 0x1C1) | |
2581 | av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); | |
2582 | else if (startcode == 0x1C2) | |
2583 | av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); | |
2584 | else if (startcode == 0x1C3) | |
2585 | av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); | |
2586 | else if (startcode <= 0x1C5) | |
2587 | av_log(s->avctx, AV_LOG_DEBUG, "reserved"); | |
2588 | else if (startcode <= 0x1FF) | |
2589 | av_log(s->avctx, AV_LOG_DEBUG, "System start"); | |
2590 | av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb)); | |
2591 | } | |
2592 | ||
2593 | if (startcode >= 0x120 && startcode <= 0x12F) { | |
f6fa7814 DM |
2594 | if ((ret = decode_vol_header(ctx, gb)) < 0) |
2595 | return ret; | |
2ba45a60 DM |
2596 | } else if (startcode == USER_DATA_STARTCODE) { |
2597 | decode_user_data(ctx, gb); | |
2598 | } else if (startcode == GOP_STARTCODE) { | |
2599 | mpeg4_decode_gop_header(s, gb); | |
2600 | } else if (startcode == VOS_STARTCODE) { | |
2601 | mpeg4_decode_profile_level(s, gb); | |
2602 | } else if (startcode == VOP_STARTCODE) { | |
2603 | break; | |
2604 | } | |
2605 | ||
2606 | align_get_bits(gb); | |
2607 | startcode = 0xff; | |
2608 | } | |
2609 | ||
2610 | end: | |
2611 | if (s->flags & CODEC_FLAG_LOW_DELAY) | |
2612 | s->low_delay = 1; | |
2613 | s->avctx->has_b_frames = !s->low_delay; | |
2614 | ||
2615 | return decode_vop_header(ctx, gb); | |
2616 | } | |
2617 | ||
2618 | av_cold void ff_mpeg4videodec_static_init(void) { | |
2619 | static int done = 0; | |
2620 | ||
2621 | if (!done) { | |
2622 | ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); | |
2623 | ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]); | |
2624 | ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]); | |
2625 | INIT_VLC_RL(ff_mpeg4_rl_intra, 554); | |
2626 | INIT_VLC_RL(ff_rvlc_rl_inter, 1072); | |
2627 | INIT_VLC_RL(ff_rvlc_rl_intra, 1072); | |
2628 | INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */, | |
2629 | &ff_mpeg4_DCtab_lum[0][1], 2, 1, | |
2630 | &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); | |
2631 | INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, | |
2632 | &ff_mpeg4_DCtab_chrom[0][1], 2, 1, | |
2633 | &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); | |
2634 | INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, | |
2635 | &ff_sprite_trajectory_tab[0][1], 4, 2, | |
2636 | &ff_sprite_trajectory_tab[0][0], 4, 2, 128); | |
2637 | INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, | |
2638 | &ff_mb_type_b_tab[0][1], 2, 1, | |
2639 | &ff_mb_type_b_tab[0][0], 2, 1, 16); | |
2640 | done = 1; | |
2641 | } | |
2642 | } | |
2643 | ||
2644 | int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size) | |
2645 | { | |
2646 | Mpeg4DecContext *ctx = avctx->priv_data; | |
2647 | MpegEncContext *s = &ctx->m; | |
2648 | ||
2649 | /* divx 5.01+ bitstream reorder stuff */ | |
2650 | /* Since this clobbers the input buffer and hwaccel codecs still need the | |
2651 | * data during hwaccel->end_frame we should not do this any earlier */ | |
2652 | if (s->divx_packed) { | |
2653 | int current_pos = s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb) >> 3); | |
2654 | int startcode_found = 0; | |
2655 | ||
2656 | if (buf_size - current_pos > 7) { | |
2657 | ||
2658 | int i; | |
2659 | for (i = current_pos; i < buf_size - 4; i++) | |
2660 | ||
2661 | if (buf[i] == 0 && | |
2662 | buf[i + 1] == 0 && | |
2663 | buf[i + 2] == 1 && | |
2664 | buf[i + 3] == 0xB6) { | |
2665 | startcode_found = !(buf[i + 4] & 0x40); | |
2666 | break; | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | if (startcode_found) { | |
2671 | av_fast_padded_malloc(&s->bitstream_buffer, | |
2672 | &s->allocated_bitstream_buffer_size, | |
2673 | buf_size - current_pos); | |
2674 | if (!s->bitstream_buffer) | |
2675 | return AVERROR(ENOMEM); | |
2676 | memcpy(s->bitstream_buffer, buf + current_pos, | |
2677 | buf_size - current_pos); | |
2678 | s->bitstream_buffer_size = buf_size - current_pos; | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | return 0; | |
2683 | } | |
2684 | ||
2685 | static int mpeg4_update_thread_context(AVCodecContext *dst, | |
2686 | const AVCodecContext *src) | |
2687 | { | |
2688 | Mpeg4DecContext *s = dst->priv_data; | |
2689 | const Mpeg4DecContext *s1 = src->priv_data; | |
2690 | int init = s->m.context_initialized; | |
2691 | ||
2692 | int ret = ff_mpeg_update_thread_context(dst, src); | |
2693 | ||
2694 | if (ret < 0) | |
2695 | return ret; | |
2696 | ||
2697 | memcpy(((uint8_t*)s) + sizeof(MpegEncContext), ((uint8_t*)s1) + sizeof(MpegEncContext), sizeof(Mpeg4DecContext) - sizeof(MpegEncContext)); | |
2698 | ||
2699 | if (CONFIG_MPEG4_DECODER && !init && s1->xvid_build >= 0) | |
2700 | ff_xvid_idct_init(&s->m.idsp, dst); | |
2701 | ||
2702 | return 0; | |
2703 | } | |
2704 | ||
2705 | static av_cold int decode_init(AVCodecContext *avctx) | |
2706 | { | |
2707 | Mpeg4DecContext *ctx = avctx->priv_data; | |
2708 | MpegEncContext *s = &ctx->m; | |
2709 | int ret; | |
2710 | ||
2711 | ctx->divx_version = | |
2712 | ctx->divx_build = | |
2713 | ctx->xvid_build = | |
2714 | ctx->lavc_build = -1; | |
2715 | ||
2716 | if ((ret = ff_h263_decode_init(avctx)) < 0) | |
2717 | return ret; | |
2718 | ||
2719 | ff_mpeg4videodec_static_init(); | |
2720 | ||
2721 | s->h263_pred = 1; | |
2722 | s->low_delay = 0; /* default, might be overridden in the vol header during header parsing */ | |
2723 | s->decode_mb = mpeg4_decode_mb; | |
2724 | ctx->time_increment_bits = 4; /* default value for broken headers */ | |
2725 | ||
2726 | avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; | |
2727 | avctx->internal->allocate_progress = 1; | |
2728 | ||
2729 | return 0; | |
2730 | } | |
2731 | ||
2732 | static const AVProfile mpeg4_video_profiles[] = { | |
2733 | { FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" }, | |
2734 | { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" }, | |
2735 | { FF_PROFILE_MPEG4_CORE, "Core Profile" }, | |
2736 | { FF_PROFILE_MPEG4_MAIN, "Main Profile" }, | |
2737 | { FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" }, | |
2738 | { FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" }, | |
2739 | { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" }, | |
2740 | { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" }, | |
2741 | { FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" }, | |
2742 | { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" }, | |
2743 | { FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" }, | |
2744 | { FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" }, | |
2745 | { FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" }, | |
2746 | { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" }, | |
2747 | { FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" }, | |
2748 | { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" }, | |
2749 | { FF_PROFILE_UNKNOWN }, | |
2750 | }; | |
2751 | ||
2752 | static const AVOption mpeg4_options[] = { | |
2753 | {"quarter_sample", "1/4 subpel MC", offsetof(MpegEncContext, quarter_sample), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0}, | |
2754 | {"divx_packed", "divx style packed b frames", offsetof(MpegEncContext, divx_packed), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0}, | |
2755 | {NULL} | |
2756 | }; | |
2757 | ||
2758 | static const AVClass mpeg4_class = { | |
2759 | "MPEG4 Video Decoder", | |
2760 | av_default_item_name, | |
2761 | mpeg4_options, | |
2762 | LIBAVUTIL_VERSION_INT, | |
2763 | }; | |
2764 | ||
2765 | AVCodec ff_mpeg4_decoder = { | |
2766 | .name = "mpeg4", | |
2767 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), | |
2768 | .type = AVMEDIA_TYPE_VIDEO, | |
2769 | .id = AV_CODEC_ID_MPEG4, | |
2770 | .priv_data_size = sizeof(Mpeg4DecContext), | |
2771 | .init = decode_init, | |
2772 | .close = ff_h263_decode_end, | |
2773 | .decode = ff_h263_decode_frame, | |
2774 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | | |
2775 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | | |
2776 | CODEC_CAP_FRAME_THREADS, | |
2777 | .flush = ff_mpeg_flush, | |
2778 | .max_lowres = 3, | |
2779 | .pix_fmts = ff_h263_hwaccel_pixfmt_list_420, | |
2780 | .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles), | |
2781 | .update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg4_update_thread_context), | |
2782 | .priv_class = &mpeg4_class, | |
2783 | }; | |
2784 | ||
2785 | ||
2786 | #if CONFIG_MPEG4_VDPAU_DECODER | |
2787 | static const AVClass mpeg4_vdpau_class = { | |
2788 | "MPEG4 Video VDPAU Decoder", | |
2789 | av_default_item_name, | |
2790 | mpeg4_options, | |
2791 | LIBAVUTIL_VERSION_INT, | |
2792 | }; | |
2793 | ||
2794 | AVCodec ff_mpeg4_vdpau_decoder = { | |
2795 | .name = "mpeg4_vdpau", | |
2796 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"), | |
2797 | .type = AVMEDIA_TYPE_VIDEO, | |
2798 | .id = AV_CODEC_ID_MPEG4, | |
2799 | .priv_data_size = sizeof(Mpeg4DecContext), | |
2800 | .init = decode_init, | |
2801 | .close = ff_h263_decode_end, | |
2802 | .decode = ff_h263_decode_frame, | |
2803 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | | |
2804 | CODEC_CAP_HWACCEL_VDPAU, | |
2805 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_VDPAU_MPEG4, | |
2806 | AV_PIX_FMT_NONE }, | |
2807 | .priv_class = &mpeg4_vdpau_class, | |
2808 | }; | |
2809 | #endif |