| 1 | /* |
| 2 | * Copyright (c) 2002 The FFmpeg Project |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include "avcodec.h" |
| 22 | #include "h263.h" |
| 23 | #include "intrax8.h" |
| 24 | #include "mathops.h" |
| 25 | #include "mpegutils.h" |
| 26 | #include "mpegvideo.h" |
| 27 | #include "msmpeg4.h" |
| 28 | #include "msmpeg4data.h" |
| 29 | #include "wmv2.h" |
| 30 | |
| 31 | |
| 32 | static void parse_mb_skip(Wmv2Context *w) |
| 33 | { |
| 34 | int mb_x, mb_y; |
| 35 | MpegEncContext *const s = &w->s; |
| 36 | uint32_t *const mb_type = s->current_picture_ptr->mb_type; |
| 37 | |
| 38 | w->skip_type = get_bits(&s->gb, 2); |
| 39 | switch (w->skip_type) { |
| 40 | case SKIP_TYPE_NONE: |
| 41 | for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| 42 | for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| 43 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 44 | MB_TYPE_16x16 | MB_TYPE_L0; |
| 45 | break; |
| 46 | case SKIP_TYPE_MPEG: |
| 47 | for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| 48 | for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| 49 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 50 | (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| 51 | break; |
| 52 | case SKIP_TYPE_ROW: |
| 53 | for (mb_y = 0; mb_y < s->mb_height; mb_y++) { |
| 54 | if (get_bits1(&s->gb)) { |
| 55 | for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| 56 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 57 | MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| 58 | } else { |
| 59 | for (mb_x = 0; mb_x < s->mb_width; mb_x++) |
| 60 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 61 | (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| 62 | } |
| 63 | } |
| 64 | break; |
| 65 | case SKIP_TYPE_COL: |
| 66 | for (mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 67 | if (get_bits1(&s->gb)) { |
| 68 | for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| 69 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 70 | MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| 71 | } else { |
| 72 | for (mb_y = 0; mb_y < s->mb_height; mb_y++) |
| 73 | mb_type[mb_y * s->mb_stride + mb_x] = |
| 74 | (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0; |
| 75 | } |
| 76 | } |
| 77 | break; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static int decode_ext_header(Wmv2Context *w) |
| 82 | { |
| 83 | MpegEncContext *const s = &w->s; |
| 84 | GetBitContext gb; |
| 85 | int fps; |
| 86 | int code; |
| 87 | |
| 88 | if (s->avctx->extradata_size < 4) |
| 89 | return -1; |
| 90 | |
| 91 | init_get_bits(&gb, s->avctx->extradata, 32); |
| 92 | |
| 93 | fps = get_bits(&gb, 5); |
| 94 | s->bit_rate = get_bits(&gb, 11) * 1024; |
| 95 | w->mspel_bit = get_bits1(&gb); |
| 96 | s->loop_filter = get_bits1(&gb); |
| 97 | w->abt_flag = get_bits1(&gb); |
| 98 | w->j_type_bit = get_bits1(&gb); |
| 99 | w->top_left_mv_flag = get_bits1(&gb); |
| 100 | w->per_mb_rl_bit = get_bits1(&gb); |
| 101 | code = get_bits(&gb, 3); |
| 102 | |
| 103 | if (code == 0) |
| 104 | return -1; |
| 105 | |
| 106 | s->slice_height = s->mb_height / code; |
| 107 | |
| 108 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) |
| 109 | av_log(s->avctx, AV_LOG_DEBUG, |
| 110 | "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, " |
| 111 | "tl_mv_flag:%d, mbrl_bit:%d, code:%d, loop_filter:%d, " |
| 112 | "slices:%d\n", |
| 113 | fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, |
| 114 | w->top_left_mv_flag, w->per_mb_rl_bit, code, s->loop_filter, |
| 115 | code); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | int ff_wmv2_decode_picture_header(MpegEncContext *s) |
| 120 | { |
| 121 | Wmv2Context *const w = (Wmv2Context *) s; |
| 122 | int code; |
| 123 | |
| 124 | if (s->picture_number == 0) |
| 125 | decode_ext_header(w); |
| 126 | |
| 127 | s->pict_type = get_bits1(&s->gb) + 1; |
| 128 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
| 129 | code = get_bits(&s->gb, 7); |
| 130 | av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code); |
| 131 | } |
| 132 | s->chroma_qscale = s->qscale = get_bits(&s->gb, 5); |
| 133 | if (s->qscale <= 0) |
| 134 | return -1; |
| 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s) |
| 140 | { |
| 141 | Wmv2Context *const w = (Wmv2Context *) s; |
| 142 | |
| 143 | if (s->pict_type == AV_PICTURE_TYPE_I) { |
| 144 | if (w->j_type_bit) |
| 145 | w->j_type = get_bits1(&s->gb); |
| 146 | else |
| 147 | w->j_type = 0; // FIXME check |
| 148 | |
| 149 | if (!w->j_type) { |
| 150 | if (w->per_mb_rl_bit) |
| 151 | s->per_mb_rl_table = get_bits1(&s->gb); |
| 152 | else |
| 153 | s->per_mb_rl_table = 0; |
| 154 | |
| 155 | if (!s->per_mb_rl_table) { |
| 156 | s->rl_chroma_table_index = decode012(&s->gb); |
| 157 | s->rl_table_index = decode012(&s->gb); |
| 158 | } |
| 159 | |
| 160 | s->dc_table_index = get_bits1(&s->gb); |
| 161 | } |
| 162 | s->inter_intra_pred = 0; |
| 163 | s->no_rounding = 1; |
| 164 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
| 165 | av_log(s->avctx, AV_LOG_DEBUG, |
| 166 | "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", |
| 167 | s->qscale, s->rl_chroma_table_index, s->rl_table_index, |
| 168 | s->dc_table_index, s->per_mb_rl_table, w->j_type); |
| 169 | } |
| 170 | } else { |
| 171 | int cbp_index; |
| 172 | w->j_type = 0; |
| 173 | |
| 174 | parse_mb_skip(w); |
| 175 | cbp_index = decode012(&s->gb); |
| 176 | if (s->qscale <= 10) { |
| 177 | int map[3] = { 0, 2, 1 }; |
| 178 | w->cbp_table_index = map[cbp_index]; |
| 179 | } else if (s->qscale <= 20) { |
| 180 | int map[3] = { 1, 0, 2 }; |
| 181 | w->cbp_table_index = map[cbp_index]; |
| 182 | } else { |
| 183 | int map[3] = {2,1,0}; |
| 184 | w->cbp_table_index = map[cbp_index]; |
| 185 | } |
| 186 | |
| 187 | if (w->mspel_bit) |
| 188 | s->mspel = get_bits1(&s->gb); |
| 189 | else |
| 190 | s->mspel = 0; // FIXME check |
| 191 | |
| 192 | if (w->abt_flag) { |
| 193 | w->per_mb_abt = get_bits1(&s->gb) ^ 1; |
| 194 | if (!w->per_mb_abt) |
| 195 | w->abt_type = decode012(&s->gb); |
| 196 | } |
| 197 | |
| 198 | if (w->per_mb_rl_bit) |
| 199 | s->per_mb_rl_table = get_bits1(&s->gb); |
| 200 | else |
| 201 | s->per_mb_rl_table = 0; |
| 202 | |
| 203 | if (!s->per_mb_rl_table) { |
| 204 | s->rl_table_index = decode012(&s->gb); |
| 205 | s->rl_chroma_table_index = s->rl_table_index; |
| 206 | } |
| 207 | |
| 208 | s->dc_table_index = get_bits1(&s->gb); |
| 209 | s->mv_table_index = get_bits1(&s->gb); |
| 210 | |
| 211 | s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE); |
| 212 | s->no_rounding ^= 1; |
| 213 | |
| 214 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) { |
| 215 | av_log(s->avctx, AV_LOG_DEBUG, |
| 216 | "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d " |
| 217 | "per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n", |
| 218 | s->rl_table_index, s->rl_chroma_table_index, |
| 219 | s->dc_table_index, s->mv_table_index, |
| 220 | s->per_mb_rl_table, s->qscale, s->mspel, |
| 221 | w->per_mb_abt, w->abt_type, w->cbp_table_index, |
| 222 | s->inter_intra_pred); |
| 223 | } |
| 224 | } |
| 225 | s->esc3_level_length = 0; |
| 226 | s->esc3_run_length = 0; |
| 227 | s->picture_number++; // FIXME ? |
| 228 | |
| 229 | if (w->j_type) { |
| 230 | ff_intrax8_decode_picture(&w->x8, 2 * s->qscale, (s->qscale - 1) | 1); |
| 231 | return 1; |
| 232 | } |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr) |
| 238 | { |
| 239 | MpegEncContext *const s = &w->s; |
| 240 | int ret; |
| 241 | |
| 242 | ret = ff_msmpeg4_decode_motion(s, mx_ptr, my_ptr); |
| 243 | |
| 244 | if (ret < 0) |
| 245 | return -1; |
| 246 | |
| 247 | if ((((*mx_ptr) | (*my_ptr)) & 1) && s->mspel) |
| 248 | w->hshift = get_bits1(&s->gb); |
| 249 | else |
| 250 | w->hshift = 0; |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py) |
| 256 | { |
| 257 | MpegEncContext *const s = &w->s; |
| 258 | int xy, wrap, diff, type; |
| 259 | int16_t *A, *B, *C, *mot_val; |
| 260 | |
| 261 | wrap = s->b8_stride; |
| 262 | xy = s->block_index[0]; |
| 263 | |
| 264 | mot_val = s->current_picture.motion_val[0][xy]; |
| 265 | |
| 266 | A = s->current_picture.motion_val[0][xy - 1]; |
| 267 | B = s->current_picture.motion_val[0][xy - wrap]; |
| 268 | C = s->current_picture.motion_val[0][xy + 2 - wrap]; |
| 269 | |
| 270 | if (s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag) |
| 271 | diff = FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1])); |
| 272 | else |
| 273 | diff = 0; |
| 274 | |
| 275 | if (diff >= 8) |
| 276 | type = get_bits1(&s->gb); |
| 277 | else |
| 278 | type = 2; |
| 279 | |
| 280 | if (type == 0) { |
| 281 | *px = A[0]; |
| 282 | *py = A[1]; |
| 283 | } else if (type == 1) { |
| 284 | *px = B[0]; |
| 285 | *py = B[1]; |
| 286 | } else { |
| 287 | /* special case for first (slice) line */ |
| 288 | if (s->first_slice_line) { |
| 289 | *px = A[0]; |
| 290 | *py = A[1]; |
| 291 | } else { |
| 292 | *px = mid_pred(A[0], B[0], C[0]); |
| 293 | *py = mid_pred(A[1], B[1], C[1]); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return mot_val; |
| 298 | } |
| 299 | |
| 300 | static inline int wmv2_decode_inter_block(Wmv2Context *w, int16_t *block, |
| 301 | int n, int cbp) |
| 302 | { |
| 303 | MpegEncContext *const s = &w->s; |
| 304 | static const int sub_cbp_table[3] = { 2, 3, 1 }; |
| 305 | int sub_cbp; |
| 306 | |
| 307 | if (!cbp) { |
| 308 | s->block_last_index[n] = -1; |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | if (w->per_block_abt) |
| 313 | w->abt_type = decode012(&s->gb); |
| 314 | w->abt_type_table[n] = w->abt_type; |
| 315 | |
| 316 | if (w->abt_type) { |
| 317 | // const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].permutated; |
| 318 | const uint8_t *scantable = w->abt_scantable[w->abt_type - 1].scantable; |
| 319 | // const uint8_t *scantable = w->abt_type - 1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable; |
| 320 | |
| 321 | sub_cbp = sub_cbp_table[decode012(&s->gb)]; |
| 322 | |
| 323 | if (sub_cbp & 1) |
| 324 | if (ff_msmpeg4_decode_block(s, block, n, 1, scantable) < 0) |
| 325 | return -1; |
| 326 | |
| 327 | if (sub_cbp & 2) |
| 328 | if (ff_msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0) |
| 329 | return -1; |
| 330 | |
| 331 | s->block_last_index[n] = 63; |
| 332 | |
| 333 | return 0; |
| 334 | } else { |
| 335 | return ff_msmpeg4_decode_block(s, block, n, 1, |
| 336 | s->inter_scantable.permutated); |
| 337 | } |
| 338 | } |
| 339 | |
| 340 | int ff_wmv2_decode_mb(MpegEncContext *s, int16_t block[6][64]) |
| 341 | { |
| 342 | Wmv2Context *const w = (Wmv2Context *) s; |
| 343 | int cbp, code, i; |
| 344 | uint8_t *coded_val; |
| 345 | |
| 346 | if (w->j_type) |
| 347 | return 0; |
| 348 | |
| 349 | if (s->pict_type == AV_PICTURE_TYPE_P) { |
| 350 | if (IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])) { |
| 351 | /* skip mb */ |
| 352 | s->mb_intra = 0; |
| 353 | for (i = 0; i < 6; i++) |
| 354 | s->block_last_index[i] = -1; |
| 355 | s->mv_dir = MV_DIR_FORWARD; |
| 356 | s->mv_type = MV_TYPE_16X16; |
| 357 | s->mv[0][0][0] = 0; |
| 358 | s->mv[0][0][1] = 0; |
| 359 | s->mb_skipped = 1; |
| 360 | w->hshift = 0; |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | code = get_vlc2(&s->gb, ff_mb_non_intra_vlc[w->cbp_table_index].table, |
| 365 | MB_NON_INTRA_VLC_BITS, 3); |
| 366 | if (code < 0) |
| 367 | return -1; |
| 368 | s->mb_intra = (~code & 0x40) >> 6; |
| 369 | |
| 370 | cbp = code & 0x3f; |
| 371 | } else { |
| 372 | s->mb_intra = 1; |
| 373 | code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2); |
| 374 | if (code < 0) { |
| 375 | av_log(s->avctx, AV_LOG_ERROR, |
| 376 | "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y); |
| 377 | return -1; |
| 378 | } |
| 379 | /* predict coded block pattern */ |
| 380 | cbp = 0; |
| 381 | for (i = 0; i < 6; i++) { |
| 382 | int val = ((code >> (5 - i)) & 1); |
| 383 | if (i < 4) { |
| 384 | int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_val); |
| 385 | val = val ^ pred; |
| 386 | *coded_val = val; |
| 387 | } |
| 388 | cbp |= val << (5 - i); |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | if (!s->mb_intra) { |
| 393 | int mx, my; |
| 394 | wmv2_pred_motion(w, &mx, &my); |
| 395 | |
| 396 | if (cbp) { |
| 397 | s->bdsp.clear_blocks(s->block[0]); |
| 398 | if (s->per_mb_rl_table) { |
| 399 | s->rl_table_index = decode012(&s->gb); |
| 400 | s->rl_chroma_table_index = s->rl_table_index; |
| 401 | } |
| 402 | |
| 403 | if (w->abt_flag && w->per_mb_abt) { |
| 404 | w->per_block_abt = get_bits1(&s->gb); |
| 405 | if (!w->per_block_abt) |
| 406 | w->abt_type = decode012(&s->gb); |
| 407 | } else |
| 408 | w->per_block_abt = 0; |
| 409 | } |
| 410 | |
| 411 | if (wmv2_decode_motion(w, &mx, &my) < 0) |
| 412 | return -1; |
| 413 | |
| 414 | s->mv_dir = MV_DIR_FORWARD; |
| 415 | s->mv_type = MV_TYPE_16X16; |
| 416 | s->mv[0][0][0] = mx; |
| 417 | s->mv[0][0][1] = my; |
| 418 | |
| 419 | for (i = 0; i < 6; i++) { |
| 420 | if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0) { |
| 421 | av_log(s->avctx, AV_LOG_ERROR, |
| 422 | "\nerror while decoding inter block: %d x %d (%d)\n", |
| 423 | s->mb_x, s->mb_y, i); |
| 424 | return -1; |
| 425 | } |
| 426 | } |
| 427 | } else { |
| 428 | if (s->pict_type == AV_PICTURE_TYPE_P) |
| 429 | av_dlog(s->avctx, "%d%d ", s->inter_intra_pred, cbp); |
| 430 | av_dlog(s->avctx, "I at %d %d %d %06X\n", s->mb_x, s->mb_y, |
| 431 | ((cbp & 3) ? 1 : 0) + ((cbp & 0x3C) ? 2 : 0), |
| 432 | show_bits(&s->gb, 24)); |
| 433 | s->ac_pred = get_bits1(&s->gb); |
| 434 | if (s->inter_intra_pred) { |
| 435 | s->h263_aic_dir = get_vlc2(&s->gb, ff_inter_intra_vlc.table, |
| 436 | INTER_INTRA_VLC_BITS, 1); |
| 437 | av_dlog(s->avctx, "%d%d %d %d/", |
| 438 | s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y); |
| 439 | } |
| 440 | if (s->per_mb_rl_table && cbp) { |
| 441 | s->rl_table_index = decode012(&s->gb); |
| 442 | s->rl_chroma_table_index = s->rl_table_index; |
| 443 | } |
| 444 | |
| 445 | s->bdsp.clear_blocks(s->block[0]); |
| 446 | for (i = 0; i < 6; i++) { |
| 447 | if (ff_msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0) { |
| 448 | av_log(s->avctx, AV_LOG_ERROR, |
| 449 | "\nerror while decoding intra block: %d x %d (%d)\n", |
| 450 | s->mb_x, s->mb_y, i); |
| 451 | return -1; |
| 452 | } |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | static av_cold int wmv2_decode_init(AVCodecContext *avctx) |
| 460 | { |
| 461 | Wmv2Context *const w = avctx->priv_data; |
| 462 | |
| 463 | avctx->flags |= CODEC_FLAG_EMU_EDGE; |
| 464 | |
| 465 | if (ff_msmpeg4_decode_init(avctx) < 0) |
| 466 | return -1; |
| 467 | |
| 468 | ff_wmv2_common_init(w); |
| 469 | |
| 470 | ff_intrax8_common_init(&w->x8, &w->s); |
| 471 | |
| 472 | return 0; |
| 473 | } |
| 474 | |
| 475 | static av_cold int wmv2_decode_end(AVCodecContext *avctx) |
| 476 | { |
| 477 | Wmv2Context *w = avctx->priv_data; |
| 478 | |
| 479 | ff_intrax8_common_end(&w->x8); |
| 480 | return ff_h263_decode_end(avctx); |
| 481 | } |
| 482 | |
| 483 | AVCodec ff_wmv2_decoder = { |
| 484 | .name = "wmv2", |
| 485 | .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"), |
| 486 | .type = AVMEDIA_TYPE_VIDEO, |
| 487 | .id = AV_CODEC_ID_WMV2, |
| 488 | .priv_data_size = sizeof(Wmv2Context), |
| 489 | .init = wmv2_decode_init, |
| 490 | .close = wmv2_decode_end, |
| 491 | .decode = ff_h263_decode_frame, |
| 492 | .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1, |
| 493 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, |
| 494 | AV_PIX_FMT_NONE }, |
| 495 | }; |