| 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 | }; |