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2ba45a60 DM |
1 | /* |
2 | * RV10/RV20 decoder | |
3 | * Copyright (c) 2000,2001 Fabrice Bellard | |
4 | * Copyright (c) 2002-2004 Michael Niedermayer | |
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 | /** | |
24 | * @file | |
25 | * RV10/RV20 decoder | |
26 | */ | |
27 | ||
28 | #include <inttypes.h> | |
29 | ||
30 | #include "libavutil/imgutils.h" | |
31 | ||
32 | #include "avcodec.h" | |
33 | #include "error_resilience.h" | |
34 | #include "h263.h" | |
35 | #include "internal.h" | |
36 | #include "mpeg_er.h" | |
37 | #include "mpegvideo.h" | |
38 | #include "mpeg4video.h" | |
39 | ||
40 | #define RV_GET_MAJOR_VER(x) ((x) >> 28) | |
41 | #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF) | |
42 | #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF) | |
43 | ||
44 | #define DC_VLC_BITS 14 // FIXME find a better solution | |
45 | ||
46 | typedef struct RVDecContext { | |
47 | MpegEncContext m; | |
48 | int sub_id; | |
49 | int orig_width, orig_height; | |
50 | } RVDecContext; | |
51 | ||
52 | static const uint16_t rv_lum_code[256] = { | |
53 | 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06, | |
54 | 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e, | |
55 | 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16, | |
56 | 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e, | |
57 | 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26, | |
58 | 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e, | |
59 | 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36, | |
60 | 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e, | |
61 | 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, | |
62 | 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e, | |
63 | 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, | |
64 | 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, | |
65 | 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, | |
66 | 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, | |
67 | 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, | |
68 | 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004, | |
69 | 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027, | |
70 | 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, | |
71 | 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, | |
72 | 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, | |
73 | 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, | |
74 | 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af, | |
75 | 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7, | |
76 | 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf, | |
77 | 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47, | |
78 | 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f, | |
79 | 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57, | |
80 | 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f, | |
81 | 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67, | |
82 | 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f, | |
83 | 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77, | |
84 | 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f, | |
85 | }; | |
86 | ||
87 | static const uint8_t rv_lum_bits[256] = { | |
88 | 14, 12, 12, 12, 12, 12, 12, 12, | |
89 | 12, 12, 12, 12, 12, 12, 12, 12, | |
90 | 12, 12, 12, 12, 12, 12, 12, 12, | |
91 | 12, 12, 12, 12, 12, 12, 12, 12, | |
92 | 12, 12, 12, 12, 12, 12, 12, 12, | |
93 | 12, 12, 12, 12, 12, 12, 12, 12, | |
94 | 12, 12, 12, 12, 12, 12, 12, 12, | |
95 | 12, 12, 12, 12, 12, 12, 12, 12, | |
96 | 12, 10, 10, 10, 10, 10, 10, 10, | |
97 | 10, 10, 10, 10, 10, 10, 10, 10, | |
98 | 10, 10, 10, 10, 10, 10, 10, 10, | |
99 | 10, 10, 10, 10, 10, 10, 10, 10, | |
100 | 10, 8, 8, 8, 8, 8, 8, 8, | |
101 | 8, 8, 8, 8, 8, 8, 8, 8, | |
102 | 8, 7, 7, 7, 7, 7, 7, 7, | |
103 | 7, 6, 6, 6, 6, 5, 5, 4, | |
104 | 2, 4, 5, 5, 6, 6, 6, 6, | |
105 | 7, 7, 7, 7, 7, 7, 7, 7, | |
106 | 8, 8, 8, 8, 8, 8, 8, 8, | |
107 | 8, 8, 8, 8, 8, 8, 8, 8, | |
108 | 10, 10, 10, 10, 10, 10, 10, 10, | |
109 | 10, 10, 10, 10, 10, 10, 10, 10, | |
110 | 10, 10, 10, 10, 10, 10, 10, 10, | |
111 | 10, 10, 10, 10, 10, 10, 10, 10, | |
112 | 12, 12, 12, 12, 12, 12, 12, 12, | |
113 | 12, 12, 12, 12, 12, 12, 12, 12, | |
114 | 12, 12, 12, 12, 12, 12, 12, 12, | |
115 | 12, 12, 12, 12, 12, 12, 12, 12, | |
116 | 12, 12, 12, 12, 12, 12, 12, 12, | |
117 | 12, 12, 12, 12, 12, 12, 12, 12, | |
118 | 12, 12, 12, 12, 12, 12, 12, 12, | |
119 | 12, 12, 12, 12, 12, 12, 12, 12, | |
120 | }; | |
121 | ||
122 | static const uint16_t rv_chrom_code[256] = { | |
123 | 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06, | |
124 | 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e, | |
125 | 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16, | |
126 | 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e, | |
127 | 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26, | |
128 | 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e, | |
129 | 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36, | |
130 | 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e, | |
131 | 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86, | |
132 | 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e, | |
133 | 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96, | |
134 | 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e, | |
135 | 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6, | |
136 | 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce, | |
137 | 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, | |
138 | 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002, | |
139 | 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037, | |
140 | 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, | |
141 | 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7, | |
142 | 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df, | |
143 | 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7, | |
144 | 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf, | |
145 | 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7, | |
146 | 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf, | |
147 | 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47, | |
148 | 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f, | |
149 | 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57, | |
150 | 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f, | |
151 | 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67, | |
152 | 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f, | |
153 | 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77, | |
154 | 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f, | |
155 | }; | |
156 | ||
157 | static const uint8_t rv_chrom_bits[256] = { | |
158 | 16, 14, 14, 14, 14, 14, 14, 14, | |
159 | 14, 14, 14, 14, 14, 14, 14, 14, | |
160 | 14, 14, 14, 14, 14, 14, 14, 14, | |
161 | 14, 14, 14, 14, 14, 14, 14, 14, | |
162 | 14, 14, 14, 14, 14, 14, 14, 14, | |
163 | 14, 14, 14, 14, 14, 14, 14, 14, | |
164 | 14, 14, 14, 14, 14, 14, 14, 14, | |
165 | 14, 14, 14, 14, 14, 14, 14, 14, | |
166 | 14, 12, 12, 12, 12, 12, 12, 12, | |
167 | 12, 12, 12, 12, 12, 12, 12, 12, | |
168 | 12, 12, 12, 12, 12, 12, 12, 12, | |
169 | 12, 12, 12, 12, 12, 12, 12, 12, | |
170 | 12, 10, 10, 10, 10, 10, 10, 10, | |
171 | 10, 10, 10, 10, 10, 10, 10, 10, | |
172 | 10, 8, 8, 8, 8, 8, 8, 8, | |
173 | 8, 6, 6, 6, 6, 4, 4, 3, | |
174 | 2, 3, 4, 4, 6, 6, 6, 6, | |
175 | 8, 8, 8, 8, 8, 8, 8, 8, | |
176 | 10, 10, 10, 10, 10, 10, 10, 10, | |
177 | 10, 10, 10, 10, 10, 10, 10, 10, | |
178 | 12, 12, 12, 12, 12, 12, 12, 12, | |
179 | 12, 12, 12, 12, 12, 12, 12, 12, | |
180 | 12, 12, 12, 12, 12, 12, 12, 12, | |
181 | 12, 12, 12, 12, 12, 12, 12, 12, | |
182 | 14, 14, 14, 14, 14, 14, 14, 14, | |
183 | 14, 14, 14, 14, 14, 14, 14, 14, | |
184 | 14, 14, 14, 14, 14, 14, 14, 14, | |
185 | 14, 14, 14, 14, 14, 14, 14, 14, | |
186 | 14, 14, 14, 14, 14, 14, 14, 14, | |
187 | 14, 14, 14, 14, 14, 14, 14, 14, | |
188 | 14, 14, 14, 14, 14, 14, 14, 14, | |
189 | 14, 14, 14, 14, 14, 14, 14, 14, | |
190 | }; | |
191 | ||
192 | static VLC rv_dc_lum, rv_dc_chrom; | |
193 | ||
194 | int ff_rv_decode_dc(MpegEncContext *s, int n) | |
195 | { | |
196 | int code; | |
197 | ||
198 | if (n < 4) { | |
199 | code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2); | |
200 | if (code < 0) { | |
201 | /* XXX: I don't understand why they use LONGER codes than | |
202 | * necessary. The following code would be completely useless | |
203 | * if they had thought about it !!! */ | |
204 | code = get_bits(&s->gb, 7); | |
205 | if (code == 0x7c) { | |
206 | code = (int8_t) (get_bits(&s->gb, 7) + 1); | |
207 | } else if (code == 0x7d) { | |
208 | code = -128 + get_bits(&s->gb, 7); | |
209 | } else if (code == 0x7e) { | |
210 | if (get_bits1(&s->gb) == 0) | |
211 | code = (int8_t) (get_bits(&s->gb, 8) + 1); | |
212 | else | |
213 | code = (int8_t) (get_bits(&s->gb, 8)); | |
214 | } else if (code == 0x7f) { | |
215 | skip_bits(&s->gb, 11); | |
216 | code = 1; | |
217 | } | |
218 | } else { | |
219 | code -= 128; | |
220 | } | |
221 | } else { | |
222 | code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2); | |
223 | /* same remark */ | |
224 | if (code < 0) { | |
225 | code = get_bits(&s->gb, 9); | |
226 | if (code == 0x1fc) { | |
227 | code = (int8_t) (get_bits(&s->gb, 7) + 1); | |
228 | } else if (code == 0x1fd) { | |
229 | code = -128 + get_bits(&s->gb, 7); | |
230 | } else if (code == 0x1fe) { | |
231 | skip_bits(&s->gb, 9); | |
232 | code = 1; | |
233 | } else { | |
234 | av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n"); | |
235 | return 0xffff; | |
236 | } | |
237 | } else { | |
238 | code -= 128; | |
239 | } | |
240 | } | |
241 | return -code; | |
242 | } | |
243 | ||
244 | /* read RV 1.0 compatible frame header */ | |
245 | static int rv10_decode_picture_header(MpegEncContext *s) | |
246 | { | |
247 | int mb_count, pb_frame, marker, mb_xy; | |
248 | ||
249 | marker = get_bits1(&s->gb); | |
250 | ||
251 | if (get_bits1(&s->gb)) | |
252 | s->pict_type = AV_PICTURE_TYPE_P; | |
253 | else | |
254 | s->pict_type = AV_PICTURE_TYPE_I; | |
255 | ||
256 | if (!marker) | |
257 | av_log(s->avctx, AV_LOG_ERROR, "marker missing\n"); | |
258 | ||
259 | pb_frame = get_bits1(&s->gb); | |
260 | ||
261 | av_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame); | |
262 | ||
263 | if (pb_frame) { | |
264 | avpriv_request_sample(s->avctx, "pb frame"); | |
265 | return AVERROR_PATCHWELCOME; | |
266 | } | |
267 | ||
268 | s->qscale = get_bits(&s->gb, 5); | |
269 | if (s->qscale == 0) { | |
270 | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
271 | return AVERROR_INVALIDDATA; | |
272 | } | |
273 | ||
274 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
275 | if (s->rv10_version == 3) { | |
276 | /* specific MPEG like DC coding not used */ | |
277 | s->last_dc[0] = get_bits(&s->gb, 8); | |
278 | s->last_dc[1] = get_bits(&s->gb, 8); | |
279 | s->last_dc[2] = get_bits(&s->gb, 8); | |
280 | av_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0], | |
281 | s->last_dc[1], s->last_dc[2]); | |
282 | } | |
283 | } | |
284 | /* if multiple packets per frame are sent, the position at which | |
285 | * to display the macroblocks is coded here */ | |
286 | ||
287 | mb_xy = s->mb_x + s->mb_y * s->mb_width; | |
288 | if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) { | |
289 | s->mb_x = get_bits(&s->gb, 6); /* mb_x */ | |
290 | s->mb_y = get_bits(&s->gb, 6); /* mb_y */ | |
291 | mb_count = get_bits(&s->gb, 12); | |
292 | } else { | |
293 | s->mb_x = 0; | |
294 | s->mb_y = 0; | |
295 | mb_count = s->mb_width * s->mb_height; | |
296 | } | |
297 | skip_bits(&s->gb, 3); /* ignored */ | |
298 | s->f_code = 1; | |
299 | s->unrestricted_mv = 1; | |
300 | ||
301 | return mb_count; | |
302 | } | |
303 | ||
304 | static int rv20_decode_picture_header(RVDecContext *rv) | |
305 | { | |
306 | MpegEncContext *s = &rv->m; | |
307 | int seq, mb_pos, i, ret; | |
308 | int rpr_max; | |
309 | ||
310 | i = get_bits(&s->gb, 2); | |
311 | switch (i) { | |
312 | case 0: | |
313 | s->pict_type = AV_PICTURE_TYPE_I; | |
314 | break; | |
315 | case 1: | |
316 | s->pict_type = AV_PICTURE_TYPE_I; | |
317 | break; // hmm ... | |
318 | case 2: | |
319 | s->pict_type = AV_PICTURE_TYPE_P; | |
320 | break; | |
321 | case 3: | |
322 | s->pict_type = AV_PICTURE_TYPE_B; | |
323 | break; | |
324 | default: | |
325 | av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n"); | |
326 | return AVERROR_INVALIDDATA; | |
327 | } | |
328 | ||
329 | if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) { | |
330 | av_log(s->avctx, AV_LOG_ERROR, "low delay B\n"); | |
331 | return -1; | |
332 | } | |
333 | if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) { | |
334 | av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n"); | |
335 | return AVERROR_INVALIDDATA; | |
336 | } | |
337 | ||
338 | if (get_bits1(&s->gb)) { | |
339 | av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n"); | |
340 | return AVERROR_INVALIDDATA; | |
341 | } | |
342 | ||
343 | s->qscale = get_bits(&s->gb, 5); | |
344 | if (s->qscale == 0) { | |
345 | av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); | |
346 | return AVERROR_INVALIDDATA; | |
347 | } | |
348 | ||
349 | if (RV_GET_MINOR_VER(rv->sub_id) >= 2) | |
350 | s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres; | |
351 | ||
352 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1) | |
353 | seq = get_bits(&s->gb, 8) << 7; | |
354 | else | |
355 | seq = get_bits(&s->gb, 13) << 2; | |
356 | ||
357 | rpr_max = s->avctx->extradata[1] & 7; | |
358 | if (rpr_max) { | |
359 | int f, new_w, new_h; | |
360 | int rpr_bits = av_log2(rpr_max) + 1; | |
361 | ||
362 | f = get_bits(&s->gb, rpr_bits); | |
363 | ||
364 | if (f) { | |
365 | if (s->avctx->extradata_size < 8 + 2 * f) { | |
366 | av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n"); | |
367 | return AVERROR_INVALIDDATA; | |
368 | } | |
369 | ||
370 | new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f]; | |
371 | new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f]; | |
372 | } else { | |
373 | new_w = rv->orig_width; | |
374 | new_h = rv->orig_height; | |
375 | } | |
376 | if (new_w != s->width || new_h != s->height) { | |
377 | AVRational old_aspect = s->avctx->sample_aspect_ratio; | |
378 | av_log(s->avctx, AV_LOG_DEBUG, | |
379 | "attempting to change resolution to %dx%d\n", new_w, new_h); | |
380 | if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0) | |
381 | return AVERROR_INVALIDDATA; | |
382 | ff_mpv_common_end(s); | |
383 | ||
384 | // attempt to keep aspect during typical resolution switches | |
385 | if (!old_aspect.num) | |
386 | old_aspect = (AVRational){1, 1}; | |
387 | if (2 * new_w * s->height == new_h * s->width) | |
388 | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1}); | |
389 | if (new_w * s->height == 2 * new_h * s->width) | |
390 | s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2}); | |
391 | ||
392 | ret = ff_set_dimensions(s->avctx, new_w, new_h); | |
393 | if (ret < 0) | |
394 | return ret; | |
395 | ||
396 | s->width = new_w; | |
397 | s->height = new_h; | |
398 | if ((ret = ff_mpv_common_init(s)) < 0) | |
399 | return ret; | |
400 | } | |
401 | ||
402 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { | |
403 | av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max); | |
404 | } | |
405 | } | |
406 | if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0) | |
407 | return AVERROR_INVALIDDATA; | |
408 | ||
409 | mb_pos = ff_h263_decode_mba(s); | |
410 | ||
411 | seq |= s->time & ~0x7FFF; | |
412 | if (seq - s->time > 0x4000) | |
413 | seq -= 0x8000; | |
414 | if (seq - s->time < -0x4000) | |
415 | seq += 0x8000; | |
416 | ||
417 | if (seq != s->time) { | |
418 | if (s->pict_type != AV_PICTURE_TYPE_B) { | |
419 | s->time = seq; | |
420 | s->pp_time = s->time - s->last_non_b_time; | |
421 | s->last_non_b_time = s->time; | |
422 | } else { | |
423 | s->time = seq; | |
424 | s->pb_time = s->pp_time - (s->last_non_b_time - s->time); | |
425 | } | |
426 | } | |
427 | if (s->pict_type == AV_PICTURE_TYPE_B) { | |
428 | if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) { | |
429 | av_log(s->avctx, AV_LOG_DEBUG, | |
430 | "messed up order, possible from seeking? skipping current b frame\n"); | |
431 | #define ERROR_SKIP_FRAME -123 | |
432 | return ERROR_SKIP_FRAME; | |
433 | } | |
434 | ff_mpeg4_init_direct_mv(s); | |
435 | } | |
436 | ||
437 | s->no_rounding = get_bits1(&s->gb); | |
438 | ||
439 | if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B) | |
440 | // binary decoder reads 3+2 bits here but they don't seem to be used | |
441 | skip_bits(&s->gb, 5); | |
442 | ||
443 | s->f_code = 1; | |
444 | s->unrestricted_mv = 1; | |
445 | s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I; | |
446 | s->modified_quant = 1; | |
447 | if (!s->avctx->lowres) | |
448 | s->loop_filter = 1; | |
449 | ||
450 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { | |
451 | av_log(s->avctx, AV_LOG_INFO, | |
452 | "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n", | |
453 | seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, | |
454 | s->no_rounding); | |
455 | } | |
456 | ||
457 | av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay); | |
458 | ||
459 | return s->mb_width * s->mb_height - mb_pos; | |
460 | } | |
461 | ||
462 | static av_cold int rv10_decode_init(AVCodecContext *avctx) | |
463 | { | |
464 | RVDecContext *rv = avctx->priv_data; | |
465 | MpegEncContext *s = &rv->m; | |
466 | static int done = 0; | |
467 | int major_ver, minor_ver, micro_ver, ret; | |
468 | ||
469 | if (avctx->extradata_size < 8) { | |
470 | av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n"); | |
471 | return AVERROR_INVALIDDATA; | |
472 | } | |
473 | if ((ret = av_image_check_size(avctx->coded_width, | |
474 | avctx->coded_height, 0, avctx)) < 0) | |
475 | return ret; | |
476 | ||
477 | ff_mpv_decode_defaults(s); | |
478 | ff_mpv_decode_init(s, avctx); | |
479 | ||
480 | s->out_format = FMT_H263; | |
481 | ||
482 | rv->orig_width = | |
483 | s->width = avctx->coded_width; | |
484 | rv->orig_height = | |
485 | s->height = avctx->coded_height; | |
486 | ||
487 | s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1; | |
488 | rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4); | |
489 | ||
490 | major_ver = RV_GET_MAJOR_VER(rv->sub_id); | |
491 | minor_ver = RV_GET_MINOR_VER(rv->sub_id); | |
492 | micro_ver = RV_GET_MICRO_VER(rv->sub_id); | |
493 | ||
494 | s->low_delay = 1; | |
495 | switch (major_ver) { | |
496 | case 1: | |
497 | s->rv10_version = micro_ver ? 3 : 1; | |
498 | s->obmc = micro_ver == 2; | |
499 | break; | |
500 | case 2: | |
501 | if (minor_ver >= 2) { | |
502 | s->low_delay = 0; | |
503 | s->avctx->has_b_frames = 1; | |
504 | } | |
505 | break; | |
506 | default: | |
507 | av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id); | |
508 | avpriv_request_sample(avctx, "RV1/2 version"); | |
509 | return AVERROR_PATCHWELCOME; | |
510 | } | |
511 | ||
512 | if (avctx->debug & FF_DEBUG_PICT_INFO) { | |
513 | av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id, | |
514 | ((uint32_t *) avctx->extradata)[0]); | |
515 | } | |
516 | ||
517 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; | |
518 | ||
519 | ff_mpv_idct_init(s); | |
520 | if ((ret = ff_mpv_common_init(s)) < 0) | |
521 | return ret; | |
522 | ||
523 | ff_h263dsp_init(&s->h263dsp); | |
524 | ff_h263_decode_init_vlc(); | |
525 | ||
526 | /* init rv vlc */ | |
527 | if (!done) { | |
528 | INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256, | |
529 | rv_lum_bits, 1, 1, | |
530 | rv_lum_code, 2, 2, 16384); | |
531 | INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256, | |
532 | rv_chrom_bits, 1, 1, | |
533 | rv_chrom_code, 2, 2, 16388); | |
534 | done = 1; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | } | |
539 | ||
540 | static av_cold int rv10_decode_end(AVCodecContext *avctx) | |
541 | { | |
542 | MpegEncContext *s = avctx->priv_data; | |
543 | ||
544 | ff_mpv_common_end(s); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, | |
549 | int buf_size, int buf_size2) | |
550 | { | |
551 | RVDecContext *rv = avctx->priv_data; | |
552 | MpegEncContext *s = &rv->m; | |
553 | int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret; | |
554 | ||
555 | active_bits_size = buf_size * 8; | |
556 | init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8); | |
557 | if (s->codec_id == AV_CODEC_ID_RV10) | |
558 | mb_count = rv10_decode_picture_header(s); | |
559 | else | |
560 | mb_count = rv20_decode_picture_header(rv); | |
561 | if (mb_count < 0) { | |
562 | if (mb_count != ERROR_SKIP_FRAME) | |
563 | av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n"); | |
564 | return AVERROR_INVALIDDATA; | |
565 | } | |
566 | ||
567 | if (s->mb_x >= s->mb_width || | |
568 | s->mb_y >= s->mb_height) { | |
569 | av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y); | |
570 | return AVERROR_INVALIDDATA; | |
571 | } | |
572 | mb_pos = s->mb_y * s->mb_width + s->mb_x; | |
573 | left = s->mb_width * s->mb_height - mb_pos; | |
574 | if (mb_count > left) { | |
575 | av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n"); | |
576 | return AVERROR_INVALIDDATA; | |
577 | } | |
578 | ||
579 | if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) { | |
580 | // FIXME write parser so we always have complete frames? | |
581 | if (s->current_picture_ptr) { | |
582 | ff_er_frame_end(&s->er); | |
583 | ff_mpv_frame_end(s); | |
584 | s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0; | |
585 | } | |
586 | if ((ret = ff_mpv_frame_start(s, avctx)) < 0) | |
587 | return ret; | |
588 | ff_mpeg_er_frame_start(s); | |
589 | } else { | |
590 | if (s->current_picture_ptr->f->pict_type != s->pict_type) { | |
591 | av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n"); | |
592 | return AVERROR_INVALIDDATA; | |
593 | } | |
594 | } | |
595 | ||
596 | ||
597 | av_dlog(avctx, "qscale=%d\n", s->qscale); | |
598 | ||
599 | /* default quantization values */ | |
600 | if (s->codec_id == AV_CODEC_ID_RV10) { | |
601 | if (s->mb_y == 0) | |
602 | s->first_slice_line = 1; | |
603 | } else { | |
604 | s->first_slice_line = 1; | |
605 | s->resync_mb_x = s->mb_x; | |
606 | } | |
607 | start_mb_x = s->mb_x; | |
608 | s->resync_mb_y = s->mb_y; | |
609 | if (s->h263_aic) { | |
610 | s->y_dc_scale_table = | |
611 | s->c_dc_scale_table = ff_aic_dc_scale_table; | |
612 | } else { | |
613 | s->y_dc_scale_table = | |
614 | s->c_dc_scale_table = ff_mpeg1_dc_scale_table; | |
615 | } | |
616 | ||
617 | if (s->modified_quant) | |
618 | s->chroma_qscale_table = ff_h263_chroma_qscale_table; | |
619 | ||
620 | ff_set_qscale(s, s->qscale); | |
621 | ||
622 | s->rv10_first_dc_coded[0] = 0; | |
623 | s->rv10_first_dc_coded[1] = 0; | |
624 | s->rv10_first_dc_coded[2] = 0; | |
625 | s->block_wrap[0] = | |
626 | s->block_wrap[1] = | |
627 | s->block_wrap[2] = | |
628 | s->block_wrap[3] = s->b8_stride; | |
629 | s->block_wrap[4] = | |
630 | s->block_wrap[5] = s->mb_stride; | |
631 | ff_init_block_index(s); | |
632 | ||
633 | /* decode each macroblock */ | |
634 | for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) { | |
635 | int ret; | |
636 | ff_update_block_index(s); | |
637 | av_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y); | |
638 | ||
639 | s->mv_dir = MV_DIR_FORWARD; | |
640 | s->mv_type = MV_TYPE_16X16; | |
641 | ret = ff_h263_decode_mb(s, s->block); | |
642 | ||
643 | // Repeat the slice end check from ff_h263_decode_mb with our active | |
644 | // bitstream size | |
645 | if (ret != SLICE_ERROR) { | |
646 | int v = show_bits(&s->gb, 16); | |
647 | ||
648 | if (get_bits_count(&s->gb) + 16 > active_bits_size) | |
649 | v >>= get_bits_count(&s->gb) + 16 - active_bits_size; | |
650 | ||
651 | if (!v) | |
652 | ret = SLICE_END; | |
653 | } | |
654 | if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) && | |
655 | 8 * buf_size2 >= get_bits_count(&s->gb)) { | |
656 | active_bits_size = buf_size2 * 8; | |
657 | av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", | |
658 | 8 * buf_size, active_bits_size); | |
659 | ret = SLICE_OK; | |
660 | } | |
661 | ||
662 | if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) { | |
663 | av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, | |
664 | s->mb_y); | |
665 | return AVERROR_INVALIDDATA; | |
666 | } | |
667 | if (s->pict_type != AV_PICTURE_TYPE_B) | |
668 | ff_h263_update_motion_val(s); | |
669 | ff_mpv_decode_mb(s, s->block); | |
670 | if (s->loop_filter) | |
671 | ff_h263_loop_filter(s); | |
672 | ||
673 | if (++s->mb_x == s->mb_width) { | |
674 | s->mb_x = 0; | |
675 | s->mb_y++; | |
676 | ff_init_block_index(s); | |
677 | } | |
678 | if (s->mb_x == s->resync_mb_x) | |
679 | s->first_slice_line = 0; | |
680 | if (ret == SLICE_END) | |
681 | break; | |
682 | } | |
683 | ||
684 | ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y, | |
685 | ER_MB_END); | |
686 | ||
687 | return active_bits_size; | |
688 | } | |
689 | ||
690 | static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n) | |
691 | { | |
692 | if (avctx->slice_count) | |
693 | return avctx->slice_offset[n]; | |
694 | else | |
695 | return AV_RL32(buf + n * 8); | |
696 | } | |
697 | ||
698 | static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
699 | AVPacket *avpkt) | |
700 | { | |
701 | const uint8_t *buf = avpkt->data; | |
702 | int buf_size = avpkt->size; | |
703 | MpegEncContext *s = avctx->priv_data; | |
704 | AVFrame *pict = data; | |
705 | int i, ret; | |
706 | int slice_count; | |
707 | const uint8_t *slices_hdr = NULL; | |
708 | ||
709 | av_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size); | |
710 | s->flags = avctx->flags; | |
711 | s->flags2 = avctx->flags2; | |
712 | ||
713 | /* no supplementary picture */ | |
714 | if (buf_size == 0) { | |
715 | return 0; | |
716 | } | |
717 | ||
718 | if (!avctx->slice_count) { | |
719 | slice_count = (*buf++) + 1; | |
720 | buf_size--; | |
721 | ||
722 | if (!slice_count || buf_size <= 8 * slice_count) { | |
723 | av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", | |
724 | slice_count); | |
725 | return AVERROR_INVALIDDATA; | |
726 | } | |
727 | ||
728 | slices_hdr = buf + 4; | |
729 | buf += 8 * slice_count; | |
730 | buf_size -= 8 * slice_count; | |
731 | } else | |
732 | slice_count = avctx->slice_count; | |
733 | ||
734 | for (i = 0; i < slice_count; i++) { | |
735 | unsigned offset = get_slice_offset(avctx, slices_hdr, i); | |
736 | int size, size2; | |
737 | ||
738 | if (offset >= buf_size) | |
739 | return AVERROR_INVALIDDATA; | |
740 | ||
741 | if (i + 1 == slice_count) | |
742 | size = buf_size - offset; | |
743 | else | |
744 | size = get_slice_offset(avctx, slices_hdr, i + 1) - offset; | |
745 | ||
746 | if (i + 2 >= slice_count) | |
747 | size2 = buf_size - offset; | |
748 | else | |
749 | size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset; | |
750 | ||
751 | if (size <= 0 || size2 <= 0 || | |
752 | offset + FFMAX(size, size2) > buf_size) | |
753 | return AVERROR_INVALIDDATA; | |
754 | ||
755 | if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2)) < 0) | |
756 | return ret; | |
757 | ||
758 | if (ret > 8 * size) | |
759 | i++; | |
760 | } | |
761 | ||
762 | if (s->current_picture_ptr && s->mb_y >= s->mb_height) { | |
763 | ff_er_frame_end(&s->er); | |
764 | ff_mpv_frame_end(s); | |
765 | ||
766 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { | |
767 | if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0) | |
768 | return ret; | |
769 | ff_print_debug_info(s, s->current_picture_ptr, pict); | |
770 | ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1); | |
771 | } else if (s->last_picture_ptr) { | |
772 | if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0) | |
773 | return ret; | |
774 | ff_print_debug_info(s, s->last_picture_ptr, pict); | |
775 | ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1); | |
776 | } | |
777 | ||
778 | if (s->last_picture_ptr || s->low_delay) { | |
779 | *got_frame = 1; | |
780 | } | |
781 | ||
782 | // so we can detect if frame_end was not called (find some nicer solution...) | |
783 | s->current_picture_ptr = NULL; | |
784 | } | |
785 | ||
786 | return avpkt->size; | |
787 | } | |
788 | ||
789 | AVCodec ff_rv10_decoder = { | |
790 | .name = "rv10", | |
791 | .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"), | |
792 | .type = AVMEDIA_TYPE_VIDEO, | |
793 | .id = AV_CODEC_ID_RV10, | |
794 | .priv_data_size = sizeof(RVDecContext), | |
795 | .init = rv10_decode_init, | |
796 | .close = rv10_decode_end, | |
797 | .decode = rv10_decode_frame, | |
798 | .capabilities = CODEC_CAP_DR1, | |
799 | .max_lowres = 3, | |
800 | .pix_fmts = (const enum AVPixelFormat[]) { | |
801 | AV_PIX_FMT_YUV420P, | |
802 | AV_PIX_FMT_NONE | |
803 | }, | |
804 | }; | |
805 | ||
806 | AVCodec ff_rv20_decoder = { | |
807 | .name = "rv20", | |
808 | .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"), | |
809 | .type = AVMEDIA_TYPE_VIDEO, | |
810 | .id = AV_CODEC_ID_RV20, | |
811 | .priv_data_size = sizeof(RVDecContext), | |
812 | .init = rv10_decode_init, | |
813 | .close = rv10_decode_end, | |
814 | .decode = rv10_decode_frame, | |
815 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY, | |
816 | .flush = ff_mpeg_flush, | |
817 | .max_lowres = 3, | |
818 | .pix_fmts = (const enum AVPixelFormat[]) { | |
819 | AV_PIX_FMT_YUV420P, | |
820 | AV_PIX_FMT_NONE | |
821 | }, | |
822 | }; |