| 1 | /* |
| 2 | * Copyright (c) 2003-2004 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 | /** |
| 22 | * @file |
| 23 | * On2 VP3 Video Decoder |
| 24 | * |
| 25 | * VP3 Video Decoder by Mike Melanson (mike at multimedia.cx) |
| 26 | * For more information about the VP3 coding process, visit: |
| 27 | * http://wiki.multimedia.cx/index.php?title=On2_VP3 |
| 28 | * |
| 29 | * Theora decoder by Alex Beregszaszi |
| 30 | */ |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include "libavutil/imgutils.h" |
| 37 | |
| 38 | #include "avcodec.h" |
| 39 | #include "get_bits.h" |
| 40 | #include "hpeldsp.h" |
| 41 | #include "internal.h" |
| 42 | #include "mathops.h" |
| 43 | #include "thread.h" |
| 44 | #include "videodsp.h" |
| 45 | #include "vp3data.h" |
| 46 | #include "vp3dsp.h" |
| 47 | #include "xiph.h" |
| 48 | |
| 49 | #define FRAGMENT_PIXELS 8 |
| 50 | |
| 51 | // FIXME split things out into their own arrays |
| 52 | typedef struct Vp3Fragment { |
| 53 | int16_t dc; |
| 54 | uint8_t coding_method; |
| 55 | uint8_t qpi; |
| 56 | } Vp3Fragment; |
| 57 | |
| 58 | #define SB_NOT_CODED 0 |
| 59 | #define SB_PARTIALLY_CODED 1 |
| 60 | #define SB_FULLY_CODED 2 |
| 61 | |
| 62 | // This is the maximum length of a single long bit run that can be encoded |
| 63 | // for superblock coding or block qps. Theora special-cases this to read a |
| 64 | // bit instead of flipping the current bit to allow for runs longer than 4129. |
| 65 | #define MAXIMUM_LONG_BIT_RUN 4129 |
| 66 | |
| 67 | #define MODE_INTER_NO_MV 0 |
| 68 | #define MODE_INTRA 1 |
| 69 | #define MODE_INTER_PLUS_MV 2 |
| 70 | #define MODE_INTER_LAST_MV 3 |
| 71 | #define MODE_INTER_PRIOR_LAST 4 |
| 72 | #define MODE_USING_GOLDEN 5 |
| 73 | #define MODE_GOLDEN_MV 6 |
| 74 | #define MODE_INTER_FOURMV 7 |
| 75 | #define CODING_MODE_COUNT 8 |
| 76 | |
| 77 | /* special internal mode */ |
| 78 | #define MODE_COPY 8 |
| 79 | |
| 80 | static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb); |
| 81 | static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb); |
| 82 | |
| 83 | |
| 84 | /* There are 6 preset schemes, plus a free-form scheme */ |
| 85 | static const int ModeAlphabet[6][CODING_MODE_COUNT] = { |
| 86 | /* scheme 1: Last motion vector dominates */ |
| 87 | { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST, |
| 88 | MODE_INTER_PLUS_MV, MODE_INTER_NO_MV, |
| 89 | MODE_INTRA, MODE_USING_GOLDEN, |
| 90 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 91 | |
| 92 | /* scheme 2 */ |
| 93 | { MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST, |
| 94 | MODE_INTER_NO_MV, MODE_INTER_PLUS_MV, |
| 95 | MODE_INTRA, MODE_USING_GOLDEN, |
| 96 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 97 | |
| 98 | /* scheme 3 */ |
| 99 | { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV, |
| 100 | MODE_INTER_PRIOR_LAST, MODE_INTER_NO_MV, |
| 101 | MODE_INTRA, MODE_USING_GOLDEN, |
| 102 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 103 | |
| 104 | /* scheme 4 */ |
| 105 | { MODE_INTER_LAST_MV, MODE_INTER_PLUS_MV, |
| 106 | MODE_INTER_NO_MV, MODE_INTER_PRIOR_LAST, |
| 107 | MODE_INTRA, MODE_USING_GOLDEN, |
| 108 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 109 | |
| 110 | /* scheme 5: No motion vector dominates */ |
| 111 | { MODE_INTER_NO_MV, MODE_INTER_LAST_MV, |
| 112 | MODE_INTER_PRIOR_LAST, MODE_INTER_PLUS_MV, |
| 113 | MODE_INTRA, MODE_USING_GOLDEN, |
| 114 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 115 | |
| 116 | /* scheme 6 */ |
| 117 | { MODE_INTER_NO_MV, MODE_USING_GOLDEN, |
| 118 | MODE_INTER_LAST_MV, MODE_INTER_PRIOR_LAST, |
| 119 | MODE_INTER_PLUS_MV, MODE_INTRA, |
| 120 | MODE_GOLDEN_MV, MODE_INTER_FOURMV }, |
| 121 | }; |
| 122 | |
| 123 | static const uint8_t hilbert_offset[16][2] = { |
| 124 | { 0, 0 }, { 1, 0 }, { 1, 1 }, { 0, 1 }, |
| 125 | { 0, 2 }, { 0, 3 }, { 1, 3 }, { 1, 2 }, |
| 126 | { 2, 2 }, { 2, 3 }, { 3, 3 }, { 3, 2 }, |
| 127 | { 3, 1 }, { 2, 1 }, { 2, 0 }, { 3, 0 } |
| 128 | }; |
| 129 | |
| 130 | #define MIN_DEQUANT_VAL 2 |
| 131 | |
| 132 | typedef struct Vp3DecodeContext { |
| 133 | AVCodecContext *avctx; |
| 134 | int theora, theora_tables; |
| 135 | int version; |
| 136 | int width, height; |
| 137 | int chroma_x_shift, chroma_y_shift; |
| 138 | ThreadFrame golden_frame; |
| 139 | ThreadFrame last_frame; |
| 140 | ThreadFrame current_frame; |
| 141 | int keyframe; |
| 142 | uint8_t idct_permutation[64]; |
| 143 | uint8_t idct_scantable[64]; |
| 144 | HpelDSPContext hdsp; |
| 145 | VideoDSPContext vdsp; |
| 146 | VP3DSPContext vp3dsp; |
| 147 | DECLARE_ALIGNED(16, int16_t, block)[64]; |
| 148 | int flipped_image; |
| 149 | int last_slice_end; |
| 150 | int skip_loop_filter; |
| 151 | |
| 152 | int qps[3]; |
| 153 | int nqps; |
| 154 | int last_qps[3]; |
| 155 | |
| 156 | int superblock_count; |
| 157 | int y_superblock_width; |
| 158 | int y_superblock_height; |
| 159 | int y_superblock_count; |
| 160 | int c_superblock_width; |
| 161 | int c_superblock_height; |
| 162 | int c_superblock_count; |
| 163 | int u_superblock_start; |
| 164 | int v_superblock_start; |
| 165 | unsigned char *superblock_coding; |
| 166 | |
| 167 | int macroblock_count; |
| 168 | int macroblock_width; |
| 169 | int macroblock_height; |
| 170 | |
| 171 | int fragment_count; |
| 172 | int fragment_width[2]; |
| 173 | int fragment_height[2]; |
| 174 | |
| 175 | Vp3Fragment *all_fragments; |
| 176 | int fragment_start[3]; |
| 177 | int data_offset[3]; |
| 178 | |
| 179 | int8_t (*motion_val[2])[2]; |
| 180 | |
| 181 | /* tables */ |
| 182 | uint16_t coded_dc_scale_factor[64]; |
| 183 | uint32_t coded_ac_scale_factor[64]; |
| 184 | uint8_t base_matrix[384][64]; |
| 185 | uint8_t qr_count[2][3]; |
| 186 | uint8_t qr_size[2][3][64]; |
| 187 | uint16_t qr_base[2][3][64]; |
| 188 | |
| 189 | /** |
| 190 | * This is a list of all tokens in bitstream order. Reordering takes place |
| 191 | * by pulling from each level during IDCT. As a consequence, IDCT must be |
| 192 | * in Hilbert order, making the minimum slice height 64 for 4:2:0 and 32 |
| 193 | * otherwise. The 32 different tokens with up to 12 bits of extradata are |
| 194 | * collapsed into 3 types, packed as follows: |
| 195 | * (from the low to high bits) |
| 196 | * |
| 197 | * 2 bits: type (0,1,2) |
| 198 | * 0: EOB run, 14 bits for run length (12 needed) |
| 199 | * 1: zero run, 7 bits for run length |
| 200 | * 7 bits for the next coefficient (3 needed) |
| 201 | * 2: coefficient, 14 bits (11 needed) |
| 202 | * |
| 203 | * Coefficients are signed, so are packed in the highest bits for automatic |
| 204 | * sign extension. |
| 205 | */ |
| 206 | int16_t *dct_tokens[3][64]; |
| 207 | int16_t *dct_tokens_base; |
| 208 | #define TOKEN_EOB(eob_run) ((eob_run) << 2) |
| 209 | #define TOKEN_ZERO_RUN(coeff, zero_run) (((coeff) << 9) + ((zero_run) << 2) + 1) |
| 210 | #define TOKEN_COEFF(coeff) (((coeff) << 2) + 2) |
| 211 | |
| 212 | /** |
| 213 | * number of blocks that contain DCT coefficients at |
| 214 | * the given level or higher |
| 215 | */ |
| 216 | int num_coded_frags[3][64]; |
| 217 | int total_num_coded_frags; |
| 218 | |
| 219 | /* this is a list of indexes into the all_fragments array indicating |
| 220 | * which of the fragments are coded */ |
| 221 | int *coded_fragment_list[3]; |
| 222 | |
| 223 | VLC dc_vlc[16]; |
| 224 | VLC ac_vlc_1[16]; |
| 225 | VLC ac_vlc_2[16]; |
| 226 | VLC ac_vlc_3[16]; |
| 227 | VLC ac_vlc_4[16]; |
| 228 | |
| 229 | VLC superblock_run_length_vlc; |
| 230 | VLC fragment_run_length_vlc; |
| 231 | VLC mode_code_vlc; |
| 232 | VLC motion_vector_vlc; |
| 233 | |
| 234 | /* these arrays need to be on 16-byte boundaries since SSE2 operations |
| 235 | * index into them */ |
| 236 | DECLARE_ALIGNED(16, int16_t, qmat)[3][2][3][64]; ///< qmat[qpi][is_inter][plane] |
| 237 | |
| 238 | /* This table contains superblock_count * 16 entries. Each set of 16 |
| 239 | * numbers corresponds to the fragment indexes 0..15 of the superblock. |
| 240 | * An entry will be -1 to indicate that no entry corresponds to that |
| 241 | * index. */ |
| 242 | int *superblock_fragments; |
| 243 | |
| 244 | /* This is an array that indicates how a particular macroblock |
| 245 | * is coded. */ |
| 246 | unsigned char *macroblock_coding; |
| 247 | |
| 248 | uint8_t *edge_emu_buffer; |
| 249 | |
| 250 | /* Huffman decode */ |
| 251 | int hti; |
| 252 | unsigned int hbits; |
| 253 | int entries; |
| 254 | int huff_code_size; |
| 255 | uint32_t huffman_table[80][32][2]; |
| 256 | |
| 257 | uint8_t filter_limit_values[64]; |
| 258 | DECLARE_ALIGNED(8, int, bounding_values_array)[256 + 2]; |
| 259 | } Vp3DecodeContext; |
| 260 | |
| 261 | /************************************************************************ |
| 262 | * VP3 specific functions |
| 263 | ************************************************************************/ |
| 264 | |
| 265 | static av_cold void free_tables(AVCodecContext *avctx) |
| 266 | { |
| 267 | Vp3DecodeContext *s = avctx->priv_data; |
| 268 | |
| 269 | av_freep(&s->superblock_coding); |
| 270 | av_freep(&s->all_fragments); |
| 271 | av_freep(&s->coded_fragment_list[0]); |
| 272 | av_freep(&s->dct_tokens_base); |
| 273 | av_freep(&s->superblock_fragments); |
| 274 | av_freep(&s->macroblock_coding); |
| 275 | av_freep(&s->motion_val[0]); |
| 276 | av_freep(&s->motion_val[1]); |
| 277 | } |
| 278 | |
| 279 | static void vp3_decode_flush(AVCodecContext *avctx) |
| 280 | { |
| 281 | Vp3DecodeContext *s = avctx->priv_data; |
| 282 | |
| 283 | if (s->golden_frame.f) |
| 284 | ff_thread_release_buffer(avctx, &s->golden_frame); |
| 285 | if (s->last_frame.f) |
| 286 | ff_thread_release_buffer(avctx, &s->last_frame); |
| 287 | if (s->current_frame.f) |
| 288 | ff_thread_release_buffer(avctx, &s->current_frame); |
| 289 | } |
| 290 | |
| 291 | static av_cold int vp3_decode_end(AVCodecContext *avctx) |
| 292 | { |
| 293 | Vp3DecodeContext *s = avctx->priv_data; |
| 294 | int i; |
| 295 | |
| 296 | free_tables(avctx); |
| 297 | av_freep(&s->edge_emu_buffer); |
| 298 | |
| 299 | s->theora_tables = 0; |
| 300 | |
| 301 | /* release all frames */ |
| 302 | vp3_decode_flush(avctx); |
| 303 | av_frame_free(&s->current_frame.f); |
| 304 | av_frame_free(&s->last_frame.f); |
| 305 | av_frame_free(&s->golden_frame.f); |
| 306 | |
| 307 | if (avctx->internal->is_copy) |
| 308 | return 0; |
| 309 | |
| 310 | for (i = 0; i < 16; i++) { |
| 311 | ff_free_vlc(&s->dc_vlc[i]); |
| 312 | ff_free_vlc(&s->ac_vlc_1[i]); |
| 313 | ff_free_vlc(&s->ac_vlc_2[i]); |
| 314 | ff_free_vlc(&s->ac_vlc_3[i]); |
| 315 | ff_free_vlc(&s->ac_vlc_4[i]); |
| 316 | } |
| 317 | |
| 318 | ff_free_vlc(&s->superblock_run_length_vlc); |
| 319 | ff_free_vlc(&s->fragment_run_length_vlc); |
| 320 | ff_free_vlc(&s->mode_code_vlc); |
| 321 | ff_free_vlc(&s->motion_vector_vlc); |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * This function sets up all of the various blocks mappings: |
| 328 | * superblocks <-> fragments, macroblocks <-> fragments, |
| 329 | * superblocks <-> macroblocks |
| 330 | * |
| 331 | * @return 0 is successful; returns 1 if *anything* went wrong. |
| 332 | */ |
| 333 | static int init_block_mapping(Vp3DecodeContext *s) |
| 334 | { |
| 335 | int sb_x, sb_y, plane; |
| 336 | int x, y, i, j = 0; |
| 337 | |
| 338 | for (plane = 0; plane < 3; plane++) { |
| 339 | int sb_width = plane ? s->c_superblock_width |
| 340 | : s->y_superblock_width; |
| 341 | int sb_height = plane ? s->c_superblock_height |
| 342 | : s->y_superblock_height; |
| 343 | int frag_width = s->fragment_width[!!plane]; |
| 344 | int frag_height = s->fragment_height[!!plane]; |
| 345 | |
| 346 | for (sb_y = 0; sb_y < sb_height; sb_y++) |
| 347 | for (sb_x = 0; sb_x < sb_width; sb_x++) |
| 348 | for (i = 0; i < 16; i++) { |
| 349 | x = 4 * sb_x + hilbert_offset[i][0]; |
| 350 | y = 4 * sb_y + hilbert_offset[i][1]; |
| 351 | |
| 352 | if (x < frag_width && y < frag_height) |
| 353 | s->superblock_fragments[j++] = s->fragment_start[plane] + |
| 354 | y * frag_width + x; |
| 355 | else |
| 356 | s->superblock_fragments[j++] = -1; |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | return 0; /* successful path out */ |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * This function sets up the dequantization tables used for a particular |
| 365 | * frame. |
| 366 | */ |
| 367 | static void init_dequantizer(Vp3DecodeContext *s, int qpi) |
| 368 | { |
| 369 | int ac_scale_factor = s->coded_ac_scale_factor[s->qps[qpi]]; |
| 370 | int dc_scale_factor = s->coded_dc_scale_factor[s->qps[qpi]]; |
| 371 | int i, plane, inter, qri, bmi, bmj, qistart; |
| 372 | |
| 373 | for (inter = 0; inter < 2; inter++) { |
| 374 | for (plane = 0; plane < 3; plane++) { |
| 375 | int sum = 0; |
| 376 | for (qri = 0; qri < s->qr_count[inter][plane]; qri++) { |
| 377 | sum += s->qr_size[inter][plane][qri]; |
| 378 | if (s->qps[qpi] <= sum) |
| 379 | break; |
| 380 | } |
| 381 | qistart = sum - s->qr_size[inter][plane][qri]; |
| 382 | bmi = s->qr_base[inter][plane][qri]; |
| 383 | bmj = s->qr_base[inter][plane][qri + 1]; |
| 384 | for (i = 0; i < 64; i++) { |
| 385 | int coeff = (2 * (sum - s->qps[qpi]) * s->base_matrix[bmi][i] - |
| 386 | 2 * (qistart - s->qps[qpi]) * s->base_matrix[bmj][i] + |
| 387 | s->qr_size[inter][plane][qri]) / |
| 388 | (2 * s->qr_size[inter][plane][qri]); |
| 389 | |
| 390 | int qmin = 8 << (inter + !i); |
| 391 | int qscale = i ? ac_scale_factor : dc_scale_factor; |
| 392 | |
| 393 | s->qmat[qpi][inter][plane][s->idct_permutation[i]] = |
| 394 | av_clip((qscale * coeff) / 100 * 4, qmin, 4096); |
| 395 | } |
| 396 | /* all DC coefficients use the same quant so as not to interfere |
| 397 | * with DC prediction */ |
| 398 | s->qmat[qpi][inter][plane][0] = s->qmat[0][inter][plane][0]; |
| 399 | } |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * This function initializes the loop filter boundary limits if the frame's |
| 405 | * quality index is different from the previous frame's. |
| 406 | * |
| 407 | * The filter_limit_values may not be larger than 127. |
| 408 | */ |
| 409 | static void init_loop_filter(Vp3DecodeContext *s) |
| 410 | { |
| 411 | int *bounding_values = s->bounding_values_array + 127; |
| 412 | int filter_limit; |
| 413 | int x; |
| 414 | int value; |
| 415 | |
| 416 | filter_limit = s->filter_limit_values[s->qps[0]]; |
| 417 | av_assert0(filter_limit < 128U); |
| 418 | |
| 419 | /* set up the bounding values */ |
| 420 | memset(s->bounding_values_array, 0, 256 * sizeof(int)); |
| 421 | for (x = 0; x < filter_limit; x++) { |
| 422 | bounding_values[-x] = -x; |
| 423 | bounding_values[x] = x; |
| 424 | } |
| 425 | for (x = value = filter_limit; x < 128 && value; x++, value--) { |
| 426 | bounding_values[ x] = value; |
| 427 | bounding_values[-x] = -value; |
| 428 | } |
| 429 | if (value) |
| 430 | bounding_values[128] = value; |
| 431 | bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202; |
| 432 | } |
| 433 | |
| 434 | /* |
| 435 | * This function unpacks all of the superblock/macroblock/fragment coding |
| 436 | * information from the bitstream. |
| 437 | */ |
| 438 | static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb) |
| 439 | { |
| 440 | int superblock_starts[3] = { |
| 441 | 0, s->u_superblock_start, s->v_superblock_start |
| 442 | }; |
| 443 | int bit = 0; |
| 444 | int current_superblock = 0; |
| 445 | int current_run = 0; |
| 446 | int num_partial_superblocks = 0; |
| 447 | |
| 448 | int i, j; |
| 449 | int current_fragment; |
| 450 | int plane; |
| 451 | |
| 452 | if (s->keyframe) { |
| 453 | memset(s->superblock_coding, SB_FULLY_CODED, s->superblock_count); |
| 454 | } else { |
| 455 | /* unpack the list of partially-coded superblocks */ |
| 456 | bit = get_bits1(gb) ^ 1; |
| 457 | current_run = 0; |
| 458 | |
| 459 | while (current_superblock < s->superblock_count && get_bits_left(gb) > 0) { |
| 460 | if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN) |
| 461 | bit = get_bits1(gb); |
| 462 | else |
| 463 | bit ^= 1; |
| 464 | |
| 465 | current_run = get_vlc2(gb, s->superblock_run_length_vlc.table, |
| 466 | 6, 2) + 1; |
| 467 | if (current_run == 34) |
| 468 | current_run += get_bits(gb, 12); |
| 469 | |
| 470 | if (current_superblock + current_run > s->superblock_count) { |
| 471 | av_log(s->avctx, AV_LOG_ERROR, |
| 472 | "Invalid partially coded superblock run length\n"); |
| 473 | return -1; |
| 474 | } |
| 475 | |
| 476 | memset(s->superblock_coding + current_superblock, bit, current_run); |
| 477 | |
| 478 | current_superblock += current_run; |
| 479 | if (bit) |
| 480 | num_partial_superblocks += current_run; |
| 481 | } |
| 482 | |
| 483 | /* unpack the list of fully coded superblocks if any of the blocks were |
| 484 | * not marked as partially coded in the previous step */ |
| 485 | if (num_partial_superblocks < s->superblock_count) { |
| 486 | int superblocks_decoded = 0; |
| 487 | |
| 488 | current_superblock = 0; |
| 489 | bit = get_bits1(gb) ^ 1; |
| 490 | current_run = 0; |
| 491 | |
| 492 | while (superblocks_decoded < s->superblock_count - num_partial_superblocks && |
| 493 | get_bits_left(gb) > 0) { |
| 494 | if (s->theora && current_run == MAXIMUM_LONG_BIT_RUN) |
| 495 | bit = get_bits1(gb); |
| 496 | else |
| 497 | bit ^= 1; |
| 498 | |
| 499 | current_run = get_vlc2(gb, s->superblock_run_length_vlc.table, |
| 500 | 6, 2) + 1; |
| 501 | if (current_run == 34) |
| 502 | current_run += get_bits(gb, 12); |
| 503 | |
| 504 | for (j = 0; j < current_run; current_superblock++) { |
| 505 | if (current_superblock >= s->superblock_count) { |
| 506 | av_log(s->avctx, AV_LOG_ERROR, |
| 507 | "Invalid fully coded superblock run length\n"); |
| 508 | return -1; |
| 509 | } |
| 510 | |
| 511 | /* skip any superblocks already marked as partially coded */ |
| 512 | if (s->superblock_coding[current_superblock] == SB_NOT_CODED) { |
| 513 | s->superblock_coding[current_superblock] = 2 * bit; |
| 514 | j++; |
| 515 | } |
| 516 | } |
| 517 | superblocks_decoded += current_run; |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | /* if there were partial blocks, initialize bitstream for |
| 522 | * unpacking fragment codings */ |
| 523 | if (num_partial_superblocks) { |
| 524 | current_run = 0; |
| 525 | bit = get_bits1(gb); |
| 526 | /* toggle the bit because as soon as the first run length is |
| 527 | * fetched the bit will be toggled again */ |
| 528 | bit ^= 1; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /* figure out which fragments are coded; iterate through each |
| 533 | * superblock (all planes) */ |
| 534 | s->total_num_coded_frags = 0; |
| 535 | memset(s->macroblock_coding, MODE_COPY, s->macroblock_count); |
| 536 | |
| 537 | for (plane = 0; plane < 3; plane++) { |
| 538 | int sb_start = superblock_starts[plane]; |
| 539 | int sb_end = sb_start + (plane ? s->c_superblock_count |
| 540 | : s->y_superblock_count); |
| 541 | int num_coded_frags = 0; |
| 542 | |
| 543 | for (i = sb_start; i < sb_end && get_bits_left(gb) > 0; i++) { |
| 544 | /* iterate through all 16 fragments in a superblock */ |
| 545 | for (j = 0; j < 16; j++) { |
| 546 | /* if the fragment is in bounds, check its coding status */ |
| 547 | current_fragment = s->superblock_fragments[i * 16 + j]; |
| 548 | if (current_fragment != -1) { |
| 549 | int coded = s->superblock_coding[i]; |
| 550 | |
| 551 | if (s->superblock_coding[i] == SB_PARTIALLY_CODED) { |
| 552 | /* fragment may or may not be coded; this is the case |
| 553 | * that cares about the fragment coding runs */ |
| 554 | if (current_run-- == 0) { |
| 555 | bit ^= 1; |
| 556 | current_run = get_vlc2(gb, s->fragment_run_length_vlc.table, 5, 2); |
| 557 | } |
| 558 | coded = bit; |
| 559 | } |
| 560 | |
| 561 | if (coded) { |
| 562 | /* default mode; actual mode will be decoded in |
| 563 | * the next phase */ |
| 564 | s->all_fragments[current_fragment].coding_method = |
| 565 | MODE_INTER_NO_MV; |
| 566 | s->coded_fragment_list[plane][num_coded_frags++] = |
| 567 | current_fragment; |
| 568 | } else { |
| 569 | /* not coded; copy this fragment from the prior frame */ |
| 570 | s->all_fragments[current_fragment].coding_method = |
| 571 | MODE_COPY; |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | } |
| 576 | s->total_num_coded_frags += num_coded_frags; |
| 577 | for (i = 0; i < 64; i++) |
| 578 | s->num_coded_frags[plane][i] = num_coded_frags; |
| 579 | if (plane < 2) |
| 580 | s->coded_fragment_list[plane + 1] = s->coded_fragment_list[plane] + |
| 581 | num_coded_frags; |
| 582 | } |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * This function unpacks all the coding mode data for individual macroblocks |
| 588 | * from the bitstream. |
| 589 | */ |
| 590 | static int unpack_modes(Vp3DecodeContext *s, GetBitContext *gb) |
| 591 | { |
| 592 | int i, j, k, sb_x, sb_y; |
| 593 | int scheme; |
| 594 | int current_macroblock; |
| 595 | int current_fragment; |
| 596 | int coding_mode; |
| 597 | int custom_mode_alphabet[CODING_MODE_COUNT]; |
| 598 | const int *alphabet; |
| 599 | Vp3Fragment *frag; |
| 600 | |
| 601 | if (s->keyframe) { |
| 602 | for (i = 0; i < s->fragment_count; i++) |
| 603 | s->all_fragments[i].coding_method = MODE_INTRA; |
| 604 | } else { |
| 605 | /* fetch the mode coding scheme for this frame */ |
| 606 | scheme = get_bits(gb, 3); |
| 607 | |
| 608 | /* is it a custom coding scheme? */ |
| 609 | if (scheme == 0) { |
| 610 | for (i = 0; i < 8; i++) |
| 611 | custom_mode_alphabet[i] = MODE_INTER_NO_MV; |
| 612 | for (i = 0; i < 8; i++) |
| 613 | custom_mode_alphabet[get_bits(gb, 3)] = i; |
| 614 | alphabet = custom_mode_alphabet; |
| 615 | } else |
| 616 | alphabet = ModeAlphabet[scheme - 1]; |
| 617 | |
| 618 | /* iterate through all of the macroblocks that contain 1 or more |
| 619 | * coded fragments */ |
| 620 | for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) { |
| 621 | for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) { |
| 622 | if (get_bits_left(gb) <= 0) |
| 623 | return -1; |
| 624 | |
| 625 | for (j = 0; j < 4; j++) { |
| 626 | int mb_x = 2 * sb_x + (j >> 1); |
| 627 | int mb_y = 2 * sb_y + (((j >> 1) + j) & 1); |
| 628 | current_macroblock = mb_y * s->macroblock_width + mb_x; |
| 629 | |
| 630 | if (mb_x >= s->macroblock_width || |
| 631 | mb_y >= s->macroblock_height) |
| 632 | continue; |
| 633 | |
| 634 | #define BLOCK_X (2 * mb_x + (k & 1)) |
| 635 | #define BLOCK_Y (2 * mb_y + (k >> 1)) |
| 636 | /* coding modes are only stored if the macroblock has |
| 637 | * at least one luma block coded, otherwise it must be |
| 638 | * INTER_NO_MV */ |
| 639 | for (k = 0; k < 4; k++) { |
| 640 | current_fragment = BLOCK_Y * |
| 641 | s->fragment_width[0] + BLOCK_X; |
| 642 | if (s->all_fragments[current_fragment].coding_method != MODE_COPY) |
| 643 | break; |
| 644 | } |
| 645 | if (k == 4) { |
| 646 | s->macroblock_coding[current_macroblock] = MODE_INTER_NO_MV; |
| 647 | continue; |
| 648 | } |
| 649 | |
| 650 | /* mode 7 means get 3 bits for each coding mode */ |
| 651 | if (scheme == 7) |
| 652 | coding_mode = get_bits(gb, 3); |
| 653 | else |
| 654 | coding_mode = alphabet[get_vlc2(gb, s->mode_code_vlc.table, 3, 3)]; |
| 655 | |
| 656 | s->macroblock_coding[current_macroblock] = coding_mode; |
| 657 | for (k = 0; k < 4; k++) { |
| 658 | frag = s->all_fragments + BLOCK_Y * s->fragment_width[0] + BLOCK_X; |
| 659 | if (frag->coding_method != MODE_COPY) |
| 660 | frag->coding_method = coding_mode; |
| 661 | } |
| 662 | |
| 663 | #define SET_CHROMA_MODES \ |
| 664 | if (frag[s->fragment_start[1]].coding_method != MODE_COPY) \ |
| 665 | frag[s->fragment_start[1]].coding_method = coding_mode; \ |
| 666 | if (frag[s->fragment_start[2]].coding_method != MODE_COPY) \ |
| 667 | frag[s->fragment_start[2]].coding_method = coding_mode; |
| 668 | |
| 669 | if (s->chroma_y_shift) { |
| 670 | frag = s->all_fragments + mb_y * |
| 671 | s->fragment_width[1] + mb_x; |
| 672 | SET_CHROMA_MODES |
| 673 | } else if (s->chroma_x_shift) { |
| 674 | frag = s->all_fragments + |
| 675 | 2 * mb_y * s->fragment_width[1] + mb_x; |
| 676 | for (k = 0; k < 2; k++) { |
| 677 | SET_CHROMA_MODES |
| 678 | frag += s->fragment_width[1]; |
| 679 | } |
| 680 | } else { |
| 681 | for (k = 0; k < 4; k++) { |
| 682 | frag = s->all_fragments + |
| 683 | BLOCK_Y * s->fragment_width[1] + BLOCK_X; |
| 684 | SET_CHROMA_MODES |
| 685 | } |
| 686 | } |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | /* |
| 696 | * This function unpacks all the motion vectors for the individual |
| 697 | * macroblocks from the bitstream. |
| 698 | */ |
| 699 | static int unpack_vectors(Vp3DecodeContext *s, GetBitContext *gb) |
| 700 | { |
| 701 | int j, k, sb_x, sb_y; |
| 702 | int coding_mode; |
| 703 | int motion_x[4]; |
| 704 | int motion_y[4]; |
| 705 | int last_motion_x = 0; |
| 706 | int last_motion_y = 0; |
| 707 | int prior_last_motion_x = 0; |
| 708 | int prior_last_motion_y = 0; |
| 709 | int current_macroblock; |
| 710 | int current_fragment; |
| 711 | int frag; |
| 712 | |
| 713 | if (s->keyframe) |
| 714 | return 0; |
| 715 | |
| 716 | /* coding mode 0 is the VLC scheme; 1 is the fixed code scheme */ |
| 717 | coding_mode = get_bits1(gb); |
| 718 | |
| 719 | /* iterate through all of the macroblocks that contain 1 or more |
| 720 | * coded fragments */ |
| 721 | for (sb_y = 0; sb_y < s->y_superblock_height; sb_y++) { |
| 722 | for (sb_x = 0; sb_x < s->y_superblock_width; sb_x++) { |
| 723 | if (get_bits_left(gb) <= 0) |
| 724 | return -1; |
| 725 | |
| 726 | for (j = 0; j < 4; j++) { |
| 727 | int mb_x = 2 * sb_x + (j >> 1); |
| 728 | int mb_y = 2 * sb_y + (((j >> 1) + j) & 1); |
| 729 | current_macroblock = mb_y * s->macroblock_width + mb_x; |
| 730 | |
| 731 | if (mb_x >= s->macroblock_width || |
| 732 | mb_y >= s->macroblock_height || |
| 733 | s->macroblock_coding[current_macroblock] == MODE_COPY) |
| 734 | continue; |
| 735 | |
| 736 | switch (s->macroblock_coding[current_macroblock]) { |
| 737 | case MODE_INTER_PLUS_MV: |
| 738 | case MODE_GOLDEN_MV: |
| 739 | /* all 6 fragments use the same motion vector */ |
| 740 | if (coding_mode == 0) { |
| 741 | motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)]; |
| 742 | motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)]; |
| 743 | } else { |
| 744 | motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)]; |
| 745 | motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)]; |
| 746 | } |
| 747 | |
| 748 | /* vector maintenance, only on MODE_INTER_PLUS_MV */ |
| 749 | if (s->macroblock_coding[current_macroblock] == MODE_INTER_PLUS_MV) { |
| 750 | prior_last_motion_x = last_motion_x; |
| 751 | prior_last_motion_y = last_motion_y; |
| 752 | last_motion_x = motion_x[0]; |
| 753 | last_motion_y = motion_y[0]; |
| 754 | } |
| 755 | break; |
| 756 | |
| 757 | case MODE_INTER_FOURMV: |
| 758 | /* vector maintenance */ |
| 759 | prior_last_motion_x = last_motion_x; |
| 760 | prior_last_motion_y = last_motion_y; |
| 761 | |
| 762 | /* fetch 4 vectors from the bitstream, one for each |
| 763 | * Y fragment, then average for the C fragment vectors */ |
| 764 | for (k = 0; k < 4; k++) { |
| 765 | current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X; |
| 766 | if (s->all_fragments[current_fragment].coding_method != MODE_COPY) { |
| 767 | if (coding_mode == 0) { |
| 768 | motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)]; |
| 769 | motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)]; |
| 770 | } else { |
| 771 | motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)]; |
| 772 | motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)]; |
| 773 | } |
| 774 | last_motion_x = motion_x[k]; |
| 775 | last_motion_y = motion_y[k]; |
| 776 | } else { |
| 777 | motion_x[k] = 0; |
| 778 | motion_y[k] = 0; |
| 779 | } |
| 780 | } |
| 781 | break; |
| 782 | |
| 783 | case MODE_INTER_LAST_MV: |
| 784 | /* all 6 fragments use the last motion vector */ |
| 785 | motion_x[0] = last_motion_x; |
| 786 | motion_y[0] = last_motion_y; |
| 787 | |
| 788 | /* no vector maintenance (last vector remains the |
| 789 | * last vector) */ |
| 790 | break; |
| 791 | |
| 792 | case MODE_INTER_PRIOR_LAST: |
| 793 | /* all 6 fragments use the motion vector prior to the |
| 794 | * last motion vector */ |
| 795 | motion_x[0] = prior_last_motion_x; |
| 796 | motion_y[0] = prior_last_motion_y; |
| 797 | |
| 798 | /* vector maintenance */ |
| 799 | prior_last_motion_x = last_motion_x; |
| 800 | prior_last_motion_y = last_motion_y; |
| 801 | last_motion_x = motion_x[0]; |
| 802 | last_motion_y = motion_y[0]; |
| 803 | break; |
| 804 | |
| 805 | default: |
| 806 | /* covers intra, inter without MV, golden without MV */ |
| 807 | motion_x[0] = 0; |
| 808 | motion_y[0] = 0; |
| 809 | |
| 810 | /* no vector maintenance */ |
| 811 | break; |
| 812 | } |
| 813 | |
| 814 | /* assign the motion vectors to the correct fragments */ |
| 815 | for (k = 0; k < 4; k++) { |
| 816 | current_fragment = |
| 817 | BLOCK_Y * s->fragment_width[0] + BLOCK_X; |
| 818 | if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) { |
| 819 | s->motion_val[0][current_fragment][0] = motion_x[k]; |
| 820 | s->motion_val[0][current_fragment][1] = motion_y[k]; |
| 821 | } else { |
| 822 | s->motion_val[0][current_fragment][0] = motion_x[0]; |
| 823 | s->motion_val[0][current_fragment][1] = motion_y[0]; |
| 824 | } |
| 825 | } |
| 826 | |
| 827 | if (s->chroma_y_shift) { |
| 828 | if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) { |
| 829 | motion_x[0] = RSHIFT(motion_x[0] + motion_x[1] + |
| 830 | motion_x[2] + motion_x[3], 2); |
| 831 | motion_y[0] = RSHIFT(motion_y[0] + motion_y[1] + |
| 832 | motion_y[2] + motion_y[3], 2); |
| 833 | } |
| 834 | motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1); |
| 835 | motion_y[0] = (motion_y[0] >> 1) | (motion_y[0] & 1); |
| 836 | frag = mb_y * s->fragment_width[1] + mb_x; |
| 837 | s->motion_val[1][frag][0] = motion_x[0]; |
| 838 | s->motion_val[1][frag][1] = motion_y[0]; |
| 839 | } else if (s->chroma_x_shift) { |
| 840 | if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) { |
| 841 | motion_x[0] = RSHIFT(motion_x[0] + motion_x[1], 1); |
| 842 | motion_y[0] = RSHIFT(motion_y[0] + motion_y[1], 1); |
| 843 | motion_x[1] = RSHIFT(motion_x[2] + motion_x[3], 1); |
| 844 | motion_y[1] = RSHIFT(motion_y[2] + motion_y[3], 1); |
| 845 | } else { |
| 846 | motion_x[1] = motion_x[0]; |
| 847 | motion_y[1] = motion_y[0]; |
| 848 | } |
| 849 | motion_x[0] = (motion_x[0] >> 1) | (motion_x[0] & 1); |
| 850 | motion_x[1] = (motion_x[1] >> 1) | (motion_x[1] & 1); |
| 851 | |
| 852 | frag = 2 * mb_y * s->fragment_width[1] + mb_x; |
| 853 | for (k = 0; k < 2; k++) { |
| 854 | s->motion_val[1][frag][0] = motion_x[k]; |
| 855 | s->motion_val[1][frag][1] = motion_y[k]; |
| 856 | frag += s->fragment_width[1]; |
| 857 | } |
| 858 | } else { |
| 859 | for (k = 0; k < 4; k++) { |
| 860 | frag = BLOCK_Y * s->fragment_width[1] + BLOCK_X; |
| 861 | if (s->macroblock_coding[current_macroblock] == MODE_INTER_FOURMV) { |
| 862 | s->motion_val[1][frag][0] = motion_x[k]; |
| 863 | s->motion_val[1][frag][1] = motion_y[k]; |
| 864 | } else { |
| 865 | s->motion_val[1][frag][0] = motion_x[0]; |
| 866 | s->motion_val[1][frag][1] = motion_y[0]; |
| 867 | } |
| 868 | } |
| 869 | } |
| 870 | } |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | static int unpack_block_qpis(Vp3DecodeContext *s, GetBitContext *gb) |
| 878 | { |
| 879 | int qpi, i, j, bit, run_length, blocks_decoded, num_blocks_at_qpi; |
| 880 | int num_blocks = s->total_num_coded_frags; |
| 881 | |
| 882 | for (qpi = 0; qpi < s->nqps - 1 && num_blocks > 0; qpi++) { |
| 883 | i = blocks_decoded = num_blocks_at_qpi = 0; |
| 884 | |
| 885 | bit = get_bits1(gb) ^ 1; |
| 886 | run_length = 0; |
| 887 | |
| 888 | do { |
| 889 | if (run_length == MAXIMUM_LONG_BIT_RUN) |
| 890 | bit = get_bits1(gb); |
| 891 | else |
| 892 | bit ^= 1; |
| 893 | |
| 894 | run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1; |
| 895 | if (run_length == 34) |
| 896 | run_length += get_bits(gb, 12); |
| 897 | blocks_decoded += run_length; |
| 898 | |
| 899 | if (!bit) |
| 900 | num_blocks_at_qpi += run_length; |
| 901 | |
| 902 | for (j = 0; j < run_length; i++) { |
| 903 | if (i >= s->total_num_coded_frags) |
| 904 | return -1; |
| 905 | |
| 906 | if (s->all_fragments[s->coded_fragment_list[0][i]].qpi == qpi) { |
| 907 | s->all_fragments[s->coded_fragment_list[0][i]].qpi += bit; |
| 908 | j++; |
| 909 | } |
| 910 | } |
| 911 | } while (blocks_decoded < num_blocks && get_bits_left(gb) > 0); |
| 912 | |
| 913 | num_blocks -= num_blocks_at_qpi; |
| 914 | } |
| 915 | |
| 916 | return 0; |
| 917 | } |
| 918 | |
| 919 | /* |
| 920 | * This function is called by unpack_dct_coeffs() to extract the VLCs from |
| 921 | * the bitstream. The VLCs encode tokens which are used to unpack DCT |
| 922 | * data. This function unpacks all the VLCs for either the Y plane or both |
| 923 | * C planes, and is called for DC coefficients or different AC coefficient |
| 924 | * levels (since different coefficient types require different VLC tables. |
| 925 | * |
| 926 | * This function returns a residual eob run. E.g, if a particular token gave |
| 927 | * instructions to EOB the next 5 fragments and there were only 2 fragments |
| 928 | * left in the current fragment range, 3 would be returned so that it could |
| 929 | * be passed into the next call to this same function. |
| 930 | */ |
| 931 | static int unpack_vlcs(Vp3DecodeContext *s, GetBitContext *gb, |
| 932 | VLC *table, int coeff_index, |
| 933 | int plane, |
| 934 | int eob_run) |
| 935 | { |
| 936 | int i, j = 0; |
| 937 | int token; |
| 938 | int zero_run = 0; |
| 939 | int16_t coeff = 0; |
| 940 | int bits_to_get; |
| 941 | int blocks_ended; |
| 942 | int coeff_i = 0; |
| 943 | int num_coeffs = s->num_coded_frags[plane][coeff_index]; |
| 944 | int16_t *dct_tokens = s->dct_tokens[plane][coeff_index]; |
| 945 | |
| 946 | /* local references to structure members to avoid repeated deferences */ |
| 947 | int *coded_fragment_list = s->coded_fragment_list[plane]; |
| 948 | Vp3Fragment *all_fragments = s->all_fragments; |
| 949 | VLC_TYPE(*vlc_table)[2] = table->table; |
| 950 | |
| 951 | if (num_coeffs < 0) |
| 952 | av_log(s->avctx, AV_LOG_ERROR, |
| 953 | "Invalid number of coefficents at level %d\n", coeff_index); |
| 954 | |
| 955 | if (eob_run > num_coeffs) { |
| 956 | coeff_i = |
| 957 | blocks_ended = num_coeffs; |
| 958 | eob_run -= num_coeffs; |
| 959 | } else { |
| 960 | coeff_i = |
| 961 | blocks_ended = eob_run; |
| 962 | eob_run = 0; |
| 963 | } |
| 964 | |
| 965 | // insert fake EOB token to cover the split between planes or zzi |
| 966 | if (blocks_ended) |
| 967 | dct_tokens[j++] = blocks_ended << 2; |
| 968 | |
| 969 | while (coeff_i < num_coeffs && get_bits_left(gb) > 0) { |
| 970 | /* decode a VLC into a token */ |
| 971 | token = get_vlc2(gb, vlc_table, 11, 3); |
| 972 | /* use the token to get a zero run, a coefficient, and an eob run */ |
| 973 | if ((unsigned) token <= 6U) { |
| 974 | eob_run = eob_run_base[token]; |
| 975 | if (eob_run_get_bits[token]) |
| 976 | eob_run += get_bits(gb, eob_run_get_bits[token]); |
| 977 | |
| 978 | // record only the number of blocks ended in this plane, |
| 979 | // any spill will be recorded in the next plane. |
| 980 | if (eob_run > num_coeffs - coeff_i) { |
| 981 | dct_tokens[j++] = TOKEN_EOB(num_coeffs - coeff_i); |
| 982 | blocks_ended += num_coeffs - coeff_i; |
| 983 | eob_run -= num_coeffs - coeff_i; |
| 984 | coeff_i = num_coeffs; |
| 985 | } else { |
| 986 | dct_tokens[j++] = TOKEN_EOB(eob_run); |
| 987 | blocks_ended += eob_run; |
| 988 | coeff_i += eob_run; |
| 989 | eob_run = 0; |
| 990 | } |
| 991 | } else if (token >= 0) { |
| 992 | bits_to_get = coeff_get_bits[token]; |
| 993 | if (bits_to_get) |
| 994 | bits_to_get = get_bits(gb, bits_to_get); |
| 995 | coeff = coeff_tables[token][bits_to_get]; |
| 996 | |
| 997 | zero_run = zero_run_base[token]; |
| 998 | if (zero_run_get_bits[token]) |
| 999 | zero_run += get_bits(gb, zero_run_get_bits[token]); |
| 1000 | |
| 1001 | if (zero_run) { |
| 1002 | dct_tokens[j++] = TOKEN_ZERO_RUN(coeff, zero_run); |
| 1003 | } else { |
| 1004 | // Save DC into the fragment structure. DC prediction is |
| 1005 | // done in raster order, so the actual DC can't be in with |
| 1006 | // other tokens. We still need the token in dct_tokens[] |
| 1007 | // however, or else the structure collapses on itself. |
| 1008 | if (!coeff_index) |
| 1009 | all_fragments[coded_fragment_list[coeff_i]].dc = coeff; |
| 1010 | |
| 1011 | dct_tokens[j++] = TOKEN_COEFF(coeff); |
| 1012 | } |
| 1013 | |
| 1014 | if (coeff_index + zero_run > 64) { |
| 1015 | av_log(s->avctx, AV_LOG_DEBUG, |
| 1016 | "Invalid zero run of %d with %d coeffs left\n", |
| 1017 | zero_run, 64 - coeff_index); |
| 1018 | zero_run = 64 - coeff_index; |
| 1019 | } |
| 1020 | |
| 1021 | // zero runs code multiple coefficients, |
| 1022 | // so don't try to decode coeffs for those higher levels |
| 1023 | for (i = coeff_index + 1; i <= coeff_index + zero_run; i++) |
| 1024 | s->num_coded_frags[plane][i]--; |
| 1025 | coeff_i++; |
| 1026 | } else { |
| 1027 | av_log(s->avctx, AV_LOG_ERROR, "Invalid token %d\n", token); |
| 1028 | return -1; |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | if (blocks_ended > s->num_coded_frags[plane][coeff_index]) |
| 1033 | av_log(s->avctx, AV_LOG_ERROR, "More blocks ended than coded!\n"); |
| 1034 | |
| 1035 | // decrement the number of blocks that have higher coefficients for each |
| 1036 | // EOB run at this level |
| 1037 | if (blocks_ended) |
| 1038 | for (i = coeff_index + 1; i < 64; i++) |
| 1039 | s->num_coded_frags[plane][i] -= blocks_ended; |
| 1040 | |
| 1041 | // setup the next buffer |
| 1042 | if (plane < 2) |
| 1043 | s->dct_tokens[plane + 1][coeff_index] = dct_tokens + j; |
| 1044 | else if (coeff_index < 63) |
| 1045 | s->dct_tokens[0][coeff_index + 1] = dct_tokens + j; |
| 1046 | |
| 1047 | return eob_run; |
| 1048 | } |
| 1049 | |
| 1050 | static void reverse_dc_prediction(Vp3DecodeContext *s, |
| 1051 | int first_fragment, |
| 1052 | int fragment_width, |
| 1053 | int fragment_height); |
| 1054 | /* |
| 1055 | * This function unpacks all of the DCT coefficient data from the |
| 1056 | * bitstream. |
| 1057 | */ |
| 1058 | static int unpack_dct_coeffs(Vp3DecodeContext *s, GetBitContext *gb) |
| 1059 | { |
| 1060 | int i; |
| 1061 | int dc_y_table; |
| 1062 | int dc_c_table; |
| 1063 | int ac_y_table; |
| 1064 | int ac_c_table; |
| 1065 | int residual_eob_run = 0; |
| 1066 | VLC *y_tables[64]; |
| 1067 | VLC *c_tables[64]; |
| 1068 | |
| 1069 | s->dct_tokens[0][0] = s->dct_tokens_base; |
| 1070 | |
| 1071 | /* fetch the DC table indexes */ |
| 1072 | dc_y_table = get_bits(gb, 4); |
| 1073 | dc_c_table = get_bits(gb, 4); |
| 1074 | |
| 1075 | /* unpack the Y plane DC coefficients */ |
| 1076 | residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_y_table], 0, |
| 1077 | 0, residual_eob_run); |
| 1078 | if (residual_eob_run < 0) |
| 1079 | return residual_eob_run; |
| 1080 | |
| 1081 | /* reverse prediction of the Y-plane DC coefficients */ |
| 1082 | reverse_dc_prediction(s, 0, s->fragment_width[0], s->fragment_height[0]); |
| 1083 | |
| 1084 | /* unpack the C plane DC coefficients */ |
| 1085 | residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0, |
| 1086 | 1, residual_eob_run); |
| 1087 | if (residual_eob_run < 0) |
| 1088 | return residual_eob_run; |
| 1089 | residual_eob_run = unpack_vlcs(s, gb, &s->dc_vlc[dc_c_table], 0, |
| 1090 | 2, residual_eob_run); |
| 1091 | if (residual_eob_run < 0) |
| 1092 | return residual_eob_run; |
| 1093 | |
| 1094 | /* reverse prediction of the C-plane DC coefficients */ |
| 1095 | if (!(s->avctx->flags & CODEC_FLAG_GRAY)) { |
| 1096 | reverse_dc_prediction(s, s->fragment_start[1], |
| 1097 | s->fragment_width[1], s->fragment_height[1]); |
| 1098 | reverse_dc_prediction(s, s->fragment_start[2], |
| 1099 | s->fragment_width[1], s->fragment_height[1]); |
| 1100 | } |
| 1101 | |
| 1102 | /* fetch the AC table indexes */ |
| 1103 | ac_y_table = get_bits(gb, 4); |
| 1104 | ac_c_table = get_bits(gb, 4); |
| 1105 | |
| 1106 | /* build tables of AC VLC tables */ |
| 1107 | for (i = 1; i <= 5; i++) { |
| 1108 | y_tables[i] = &s->ac_vlc_1[ac_y_table]; |
| 1109 | c_tables[i] = &s->ac_vlc_1[ac_c_table]; |
| 1110 | } |
| 1111 | for (i = 6; i <= 14; i++) { |
| 1112 | y_tables[i] = &s->ac_vlc_2[ac_y_table]; |
| 1113 | c_tables[i] = &s->ac_vlc_2[ac_c_table]; |
| 1114 | } |
| 1115 | for (i = 15; i <= 27; i++) { |
| 1116 | y_tables[i] = &s->ac_vlc_3[ac_y_table]; |
| 1117 | c_tables[i] = &s->ac_vlc_3[ac_c_table]; |
| 1118 | } |
| 1119 | for (i = 28; i <= 63; i++) { |
| 1120 | y_tables[i] = &s->ac_vlc_4[ac_y_table]; |
| 1121 | c_tables[i] = &s->ac_vlc_4[ac_c_table]; |
| 1122 | } |
| 1123 | |
| 1124 | /* decode all AC coefficents */ |
| 1125 | for (i = 1; i <= 63; i++) { |
| 1126 | residual_eob_run = unpack_vlcs(s, gb, y_tables[i], i, |
| 1127 | 0, residual_eob_run); |
| 1128 | if (residual_eob_run < 0) |
| 1129 | return residual_eob_run; |
| 1130 | |
| 1131 | residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i, |
| 1132 | 1, residual_eob_run); |
| 1133 | if (residual_eob_run < 0) |
| 1134 | return residual_eob_run; |
| 1135 | residual_eob_run = unpack_vlcs(s, gb, c_tables[i], i, |
| 1136 | 2, residual_eob_run); |
| 1137 | if (residual_eob_run < 0) |
| 1138 | return residual_eob_run; |
| 1139 | } |
| 1140 | |
| 1141 | return 0; |
| 1142 | } |
| 1143 | |
| 1144 | /* |
| 1145 | * This function reverses the DC prediction for each coded fragment in |
| 1146 | * the frame. Much of this function is adapted directly from the original |
| 1147 | * VP3 source code. |
| 1148 | */ |
| 1149 | #define COMPATIBLE_FRAME(x) \ |
| 1150 | (compatible_frame[s->all_fragments[x].coding_method] == current_frame_type) |
| 1151 | #define DC_COEFF(u) s->all_fragments[u].dc |
| 1152 | |
| 1153 | static void reverse_dc_prediction(Vp3DecodeContext *s, |
| 1154 | int first_fragment, |
| 1155 | int fragment_width, |
| 1156 | int fragment_height) |
| 1157 | { |
| 1158 | #define PUL 8 |
| 1159 | #define PU 4 |
| 1160 | #define PUR 2 |
| 1161 | #define PL 1 |
| 1162 | |
| 1163 | int x, y; |
| 1164 | int i = first_fragment; |
| 1165 | |
| 1166 | int predicted_dc; |
| 1167 | |
| 1168 | /* DC values for the left, up-left, up, and up-right fragments */ |
| 1169 | int vl, vul, vu, vur; |
| 1170 | |
| 1171 | /* indexes for the left, up-left, up, and up-right fragments */ |
| 1172 | int l, ul, u, ur; |
| 1173 | |
| 1174 | /* |
| 1175 | * The 6 fields mean: |
| 1176 | * 0: up-left multiplier |
| 1177 | * 1: up multiplier |
| 1178 | * 2: up-right multiplier |
| 1179 | * 3: left multiplier |
| 1180 | */ |
| 1181 | static const int predictor_transform[16][4] = { |
| 1182 | { 0, 0, 0, 0 }, |
| 1183 | { 0, 0, 0, 128 }, // PL |
| 1184 | { 0, 0, 128, 0 }, // PUR |
| 1185 | { 0, 0, 53, 75 }, // PUR|PL |
| 1186 | { 0, 128, 0, 0 }, // PU |
| 1187 | { 0, 64, 0, 64 }, // PU |PL |
| 1188 | { 0, 128, 0, 0 }, // PU |PUR |
| 1189 | { 0, 0, 53, 75 }, // PU |PUR|PL |
| 1190 | { 128, 0, 0, 0 }, // PUL |
| 1191 | { 0, 0, 0, 128 }, // PUL|PL |
| 1192 | { 64, 0, 64, 0 }, // PUL|PUR |
| 1193 | { 0, 0, 53, 75 }, // PUL|PUR|PL |
| 1194 | { 0, 128, 0, 0 }, // PUL|PU |
| 1195 | { -104, 116, 0, 116 }, // PUL|PU |PL |
| 1196 | { 24, 80, 24, 0 }, // PUL|PU |PUR |
| 1197 | { -104, 116, 0, 116 } // PUL|PU |PUR|PL |
| 1198 | }; |
| 1199 | |
| 1200 | /* This table shows which types of blocks can use other blocks for |
| 1201 | * prediction. For example, INTRA is the only mode in this table to |
| 1202 | * have a frame number of 0. That means INTRA blocks can only predict |
| 1203 | * from other INTRA blocks. There are 2 golden frame coding types; |
| 1204 | * blocks encoding in these modes can only predict from other blocks |
| 1205 | * that were encoded with these 1 of these 2 modes. */ |
| 1206 | static const unsigned char compatible_frame[9] = { |
| 1207 | 1, /* MODE_INTER_NO_MV */ |
| 1208 | 0, /* MODE_INTRA */ |
| 1209 | 1, /* MODE_INTER_PLUS_MV */ |
| 1210 | 1, /* MODE_INTER_LAST_MV */ |
| 1211 | 1, /* MODE_INTER_PRIOR_MV */ |
| 1212 | 2, /* MODE_USING_GOLDEN */ |
| 1213 | 2, /* MODE_GOLDEN_MV */ |
| 1214 | 1, /* MODE_INTER_FOUR_MV */ |
| 1215 | 3 /* MODE_COPY */ |
| 1216 | }; |
| 1217 | int current_frame_type; |
| 1218 | |
| 1219 | /* there is a last DC predictor for each of the 3 frame types */ |
| 1220 | short last_dc[3]; |
| 1221 | |
| 1222 | int transform = 0; |
| 1223 | |
| 1224 | vul = |
| 1225 | vu = |
| 1226 | vur = |
| 1227 | vl = 0; |
| 1228 | last_dc[0] = |
| 1229 | last_dc[1] = |
| 1230 | last_dc[2] = 0; |
| 1231 | |
| 1232 | /* for each fragment row... */ |
| 1233 | for (y = 0; y < fragment_height; y++) { |
| 1234 | /* for each fragment in a row... */ |
| 1235 | for (x = 0; x < fragment_width; x++, i++) { |
| 1236 | |
| 1237 | /* reverse prediction if this block was coded */ |
| 1238 | if (s->all_fragments[i].coding_method != MODE_COPY) { |
| 1239 | current_frame_type = |
| 1240 | compatible_frame[s->all_fragments[i].coding_method]; |
| 1241 | |
| 1242 | transform = 0; |
| 1243 | if (x) { |
| 1244 | l = i - 1; |
| 1245 | vl = DC_COEFF(l); |
| 1246 | if (COMPATIBLE_FRAME(l)) |
| 1247 | transform |= PL; |
| 1248 | } |
| 1249 | if (y) { |
| 1250 | u = i - fragment_width; |
| 1251 | vu = DC_COEFF(u); |
| 1252 | if (COMPATIBLE_FRAME(u)) |
| 1253 | transform |= PU; |
| 1254 | if (x) { |
| 1255 | ul = i - fragment_width - 1; |
| 1256 | vul = DC_COEFF(ul); |
| 1257 | if (COMPATIBLE_FRAME(ul)) |
| 1258 | transform |= PUL; |
| 1259 | } |
| 1260 | if (x + 1 < fragment_width) { |
| 1261 | ur = i - fragment_width + 1; |
| 1262 | vur = DC_COEFF(ur); |
| 1263 | if (COMPATIBLE_FRAME(ur)) |
| 1264 | transform |= PUR; |
| 1265 | } |
| 1266 | } |
| 1267 | |
| 1268 | if (transform == 0) { |
| 1269 | /* if there were no fragments to predict from, use last |
| 1270 | * DC saved */ |
| 1271 | predicted_dc = last_dc[current_frame_type]; |
| 1272 | } else { |
| 1273 | /* apply the appropriate predictor transform */ |
| 1274 | predicted_dc = |
| 1275 | (predictor_transform[transform][0] * vul) + |
| 1276 | (predictor_transform[transform][1] * vu) + |
| 1277 | (predictor_transform[transform][2] * vur) + |
| 1278 | (predictor_transform[transform][3] * vl); |
| 1279 | |
| 1280 | predicted_dc /= 128; |
| 1281 | |
| 1282 | /* check for outranging on the [ul u l] and |
| 1283 | * [ul u ur l] predictors */ |
| 1284 | if ((transform == 15) || (transform == 13)) { |
| 1285 | if (FFABS(predicted_dc - vu) > 128) |
| 1286 | predicted_dc = vu; |
| 1287 | else if (FFABS(predicted_dc - vl) > 128) |
| 1288 | predicted_dc = vl; |
| 1289 | else if (FFABS(predicted_dc - vul) > 128) |
| 1290 | predicted_dc = vul; |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | /* at long last, apply the predictor */ |
| 1295 | DC_COEFF(i) += predicted_dc; |
| 1296 | /* save the DC */ |
| 1297 | last_dc[current_frame_type] = DC_COEFF(i); |
| 1298 | } |
| 1299 | } |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | static void apply_loop_filter(Vp3DecodeContext *s, int plane, |
| 1304 | int ystart, int yend) |
| 1305 | { |
| 1306 | int x, y; |
| 1307 | int *bounding_values = s->bounding_values_array + 127; |
| 1308 | |
| 1309 | int width = s->fragment_width[!!plane]; |
| 1310 | int height = s->fragment_height[!!plane]; |
| 1311 | int fragment = s->fragment_start[plane] + ystart * width; |
| 1312 | ptrdiff_t stride = s->current_frame.f->linesize[plane]; |
| 1313 | uint8_t *plane_data = s->current_frame.f->data[plane]; |
| 1314 | if (!s->flipped_image) |
| 1315 | stride = -stride; |
| 1316 | plane_data += s->data_offset[plane] + 8 * ystart * stride; |
| 1317 | |
| 1318 | for (y = ystart; y < yend; y++) { |
| 1319 | for (x = 0; x < width; x++) { |
| 1320 | /* This code basically just deblocks on the edges of coded blocks. |
| 1321 | * However, it has to be much more complicated because of the |
| 1322 | * braindamaged deblock ordering used in VP3/Theora. Order matters |
| 1323 | * because some pixels get filtered twice. */ |
| 1324 | if (s->all_fragments[fragment].coding_method != MODE_COPY) { |
| 1325 | /* do not perform left edge filter for left columns frags */ |
| 1326 | if (x > 0) { |
| 1327 | s->vp3dsp.h_loop_filter( |
| 1328 | plane_data + 8 * x, |
| 1329 | stride, bounding_values); |
| 1330 | } |
| 1331 | |
| 1332 | /* do not perform top edge filter for top row fragments */ |
| 1333 | if (y > 0) { |
| 1334 | s->vp3dsp.v_loop_filter( |
| 1335 | plane_data + 8 * x, |
| 1336 | stride, bounding_values); |
| 1337 | } |
| 1338 | |
| 1339 | /* do not perform right edge filter for right column |
| 1340 | * fragments or if right fragment neighbor is also coded |
| 1341 | * in this frame (it will be filtered in next iteration) */ |
| 1342 | if ((x < width - 1) && |
| 1343 | (s->all_fragments[fragment + 1].coding_method == MODE_COPY)) { |
| 1344 | s->vp3dsp.h_loop_filter( |
| 1345 | plane_data + 8 * x + 8, |
| 1346 | stride, bounding_values); |
| 1347 | } |
| 1348 | |
| 1349 | /* do not perform bottom edge filter for bottom row |
| 1350 | * fragments or if bottom fragment neighbor is also coded |
| 1351 | * in this frame (it will be filtered in the next row) */ |
| 1352 | if ((y < height - 1) && |
| 1353 | (s->all_fragments[fragment + width].coding_method == MODE_COPY)) { |
| 1354 | s->vp3dsp.v_loop_filter( |
| 1355 | plane_data + 8 * x + 8 * stride, |
| 1356 | stride, bounding_values); |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | fragment++; |
| 1361 | } |
| 1362 | plane_data += 8 * stride; |
| 1363 | } |
| 1364 | } |
| 1365 | |
| 1366 | /** |
| 1367 | * Pull DCT tokens from the 64 levels to decode and dequant the coefficients |
| 1368 | * for the next block in coding order |
| 1369 | */ |
| 1370 | static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag, |
| 1371 | int plane, int inter, int16_t block[64]) |
| 1372 | { |
| 1373 | int16_t *dequantizer = s->qmat[frag->qpi][inter][plane]; |
| 1374 | uint8_t *perm = s->idct_scantable; |
| 1375 | int i = 0; |
| 1376 | |
| 1377 | do { |
| 1378 | int token = *s->dct_tokens[plane][i]; |
| 1379 | switch (token & 3) { |
| 1380 | case 0: // EOB |
| 1381 | if (--token < 4) // 0-3 are token types so the EOB run must now be 0 |
| 1382 | s->dct_tokens[plane][i]++; |
| 1383 | else |
| 1384 | *s->dct_tokens[plane][i] = token & ~3; |
| 1385 | goto end; |
| 1386 | case 1: // zero run |
| 1387 | s->dct_tokens[plane][i]++; |
| 1388 | i += (token >> 2) & 0x7f; |
| 1389 | if (i > 63) { |
| 1390 | av_log(s->avctx, AV_LOG_ERROR, "Coefficient index overflow\n"); |
| 1391 | return i; |
| 1392 | } |
| 1393 | block[perm[i]] = (token >> 9) * dequantizer[perm[i]]; |
| 1394 | i++; |
| 1395 | break; |
| 1396 | case 2: // coeff |
| 1397 | block[perm[i]] = (token >> 2) * dequantizer[perm[i]]; |
| 1398 | s->dct_tokens[plane][i++]++; |
| 1399 | break; |
| 1400 | default: // shouldn't happen |
| 1401 | return i; |
| 1402 | } |
| 1403 | } while (i < 64); |
| 1404 | // return value is expected to be a valid level |
| 1405 | i--; |
| 1406 | end: |
| 1407 | // the actual DC+prediction is in the fragment structure |
| 1408 | block[0] = frag->dc * s->qmat[0][inter][plane][0]; |
| 1409 | return i; |
| 1410 | } |
| 1411 | |
| 1412 | /** |
| 1413 | * called when all pixels up to row y are complete |
| 1414 | */ |
| 1415 | static void vp3_draw_horiz_band(Vp3DecodeContext *s, int y) |
| 1416 | { |
| 1417 | int h, cy, i; |
| 1418 | int offset[AV_NUM_DATA_POINTERS]; |
| 1419 | |
| 1420 | if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) { |
| 1421 | int y_flipped = s->flipped_image ? s->avctx->height - y : y; |
| 1422 | |
| 1423 | /* At the end of the frame, report INT_MAX instead of the height of |
| 1424 | * the frame. This makes the other threads' ff_thread_await_progress() |
| 1425 | * calls cheaper, because they don't have to clip their values. */ |
| 1426 | ff_thread_report_progress(&s->current_frame, |
| 1427 | y_flipped == s->avctx->height ? INT_MAX |
| 1428 | : y_flipped - 1, |
| 1429 | 0); |
| 1430 | } |
| 1431 | |
| 1432 | if (!s->avctx->draw_horiz_band) |
| 1433 | return; |
| 1434 | |
| 1435 | h = y - s->last_slice_end; |
| 1436 | s->last_slice_end = y; |
| 1437 | y -= h; |
| 1438 | |
| 1439 | if (!s->flipped_image) |
| 1440 | y = s->avctx->height - y - h; |
| 1441 | |
| 1442 | cy = y >> s->chroma_y_shift; |
| 1443 | offset[0] = s->current_frame.f->linesize[0] * y; |
| 1444 | offset[1] = s->current_frame.f->linesize[1] * cy; |
| 1445 | offset[2] = s->current_frame.f->linesize[2] * cy; |
| 1446 | for (i = 3; i < AV_NUM_DATA_POINTERS; i++) |
| 1447 | offset[i] = 0; |
| 1448 | |
| 1449 | emms_c(); |
| 1450 | s->avctx->draw_horiz_band(s->avctx, s->current_frame.f, offset, y, 3, h); |
| 1451 | } |
| 1452 | |
| 1453 | /** |
| 1454 | * Wait for the reference frame of the current fragment. |
| 1455 | * The progress value is in luma pixel rows. |
| 1456 | */ |
| 1457 | static void await_reference_row(Vp3DecodeContext *s, Vp3Fragment *fragment, |
| 1458 | int motion_y, int y) |
| 1459 | { |
| 1460 | ThreadFrame *ref_frame; |
| 1461 | int ref_row; |
| 1462 | int border = motion_y & 1; |
| 1463 | |
| 1464 | if (fragment->coding_method == MODE_USING_GOLDEN || |
| 1465 | fragment->coding_method == MODE_GOLDEN_MV) |
| 1466 | ref_frame = &s->golden_frame; |
| 1467 | else |
| 1468 | ref_frame = &s->last_frame; |
| 1469 | |
| 1470 | ref_row = y + (motion_y >> 1); |
| 1471 | ref_row = FFMAX(FFABS(ref_row), ref_row + 8 + border); |
| 1472 | |
| 1473 | ff_thread_await_progress(ref_frame, ref_row, 0); |
| 1474 | } |
| 1475 | |
| 1476 | /* |
| 1477 | * Perform the final rendering for a particular slice of data. |
| 1478 | * The slice number ranges from 0..(c_superblock_height - 1). |
| 1479 | */ |
| 1480 | static void render_slice(Vp3DecodeContext *s, int slice) |
| 1481 | { |
| 1482 | int x, y, i, j, fragment; |
| 1483 | int16_t *block = s->block; |
| 1484 | int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef; |
| 1485 | int motion_halfpel_index; |
| 1486 | uint8_t *motion_source; |
| 1487 | int plane, first_pixel; |
| 1488 | |
| 1489 | if (slice >= s->c_superblock_height) |
| 1490 | return; |
| 1491 | |
| 1492 | for (plane = 0; plane < 3; plane++) { |
| 1493 | uint8_t *output_plane = s->current_frame.f->data[plane] + |
| 1494 | s->data_offset[plane]; |
| 1495 | uint8_t *last_plane = s->last_frame.f->data[plane] + |
| 1496 | s->data_offset[plane]; |
| 1497 | uint8_t *golden_plane = s->golden_frame.f->data[plane] + |
| 1498 | s->data_offset[plane]; |
| 1499 | ptrdiff_t stride = s->current_frame.f->linesize[plane]; |
| 1500 | int plane_width = s->width >> (plane && s->chroma_x_shift); |
| 1501 | int plane_height = s->height >> (plane && s->chroma_y_shift); |
| 1502 | int8_t(*motion_val)[2] = s->motion_val[!!plane]; |
| 1503 | |
| 1504 | int sb_x, sb_y = slice << (!plane && s->chroma_y_shift); |
| 1505 | int slice_height = sb_y + 1 + (!plane && s->chroma_y_shift); |
| 1506 | int slice_width = plane ? s->c_superblock_width |
| 1507 | : s->y_superblock_width; |
| 1508 | |
| 1509 | int fragment_width = s->fragment_width[!!plane]; |
| 1510 | int fragment_height = s->fragment_height[!!plane]; |
| 1511 | int fragment_start = s->fragment_start[plane]; |
| 1512 | |
| 1513 | int do_await = !plane && HAVE_THREADS && |
| 1514 | (s->avctx->active_thread_type & FF_THREAD_FRAME); |
| 1515 | |
| 1516 | if (!s->flipped_image) |
| 1517 | stride = -stride; |
| 1518 | if (CONFIG_GRAY && plane && (s->avctx->flags & CODEC_FLAG_GRAY)) |
| 1519 | continue; |
| 1520 | |
| 1521 | /* for each superblock row in the slice (both of them)... */ |
| 1522 | for (; sb_y < slice_height; sb_y++) { |
| 1523 | /* for each superblock in a row... */ |
| 1524 | for (sb_x = 0; sb_x < slice_width; sb_x++) { |
| 1525 | /* for each block in a superblock... */ |
| 1526 | for (j = 0; j < 16; j++) { |
| 1527 | x = 4 * sb_x + hilbert_offset[j][0]; |
| 1528 | y = 4 * sb_y + hilbert_offset[j][1]; |
| 1529 | fragment = y * fragment_width + x; |
| 1530 | |
| 1531 | i = fragment_start + fragment; |
| 1532 | |
| 1533 | // bounds check |
| 1534 | if (x >= fragment_width || y >= fragment_height) |
| 1535 | continue; |
| 1536 | |
| 1537 | first_pixel = 8 * y * stride + 8 * x; |
| 1538 | |
| 1539 | if (do_await && |
| 1540 | s->all_fragments[i].coding_method != MODE_INTRA) |
| 1541 | await_reference_row(s, &s->all_fragments[i], |
| 1542 | motion_val[fragment][1], |
| 1543 | (16 * y) >> s->chroma_y_shift); |
| 1544 | |
| 1545 | /* transform if this block was coded */ |
| 1546 | if (s->all_fragments[i].coding_method != MODE_COPY) { |
| 1547 | if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) || |
| 1548 | (s->all_fragments[i].coding_method == MODE_GOLDEN_MV)) |
| 1549 | motion_source = golden_plane; |
| 1550 | else |
| 1551 | motion_source = last_plane; |
| 1552 | |
| 1553 | motion_source += first_pixel; |
| 1554 | motion_halfpel_index = 0; |
| 1555 | |
| 1556 | /* sort out the motion vector if this fragment is coded |
| 1557 | * using a motion vector method */ |
| 1558 | if ((s->all_fragments[i].coding_method > MODE_INTRA) && |
| 1559 | (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) { |
| 1560 | int src_x, src_y; |
| 1561 | motion_x = motion_val[fragment][0]; |
| 1562 | motion_y = motion_val[fragment][1]; |
| 1563 | |
| 1564 | src_x = (motion_x >> 1) + 8 * x; |
| 1565 | src_y = (motion_y >> 1) + 8 * y; |
| 1566 | |
| 1567 | motion_halfpel_index = motion_x & 0x01; |
| 1568 | motion_source += (motion_x >> 1); |
| 1569 | |
| 1570 | motion_halfpel_index |= (motion_y & 0x01) << 1; |
| 1571 | motion_source += ((motion_y >> 1) * stride); |
| 1572 | |
| 1573 | if (src_x < 0 || src_y < 0 || |
| 1574 | src_x + 9 >= plane_width || |
| 1575 | src_y + 9 >= plane_height) { |
| 1576 | uint8_t *temp = s->edge_emu_buffer; |
| 1577 | if (stride < 0) |
| 1578 | temp -= 8 * stride; |
| 1579 | |
| 1580 | s->vdsp.emulated_edge_mc(temp, motion_source, |
| 1581 | stride, stride, |
| 1582 | 9, 9, src_x, src_y, |
| 1583 | plane_width, |
| 1584 | plane_height); |
| 1585 | motion_source = temp; |
| 1586 | } |
| 1587 | } |
| 1588 | |
| 1589 | /* first, take care of copying a block from either the |
| 1590 | * previous or the golden frame */ |
| 1591 | if (s->all_fragments[i].coding_method != MODE_INTRA) { |
| 1592 | /* Note, it is possible to implement all MC cases |
| 1593 | * with put_no_rnd_pixels_l2 which would look more |
| 1594 | * like the VP3 source but this would be slower as |
| 1595 | * put_no_rnd_pixels_tab is better optimzed */ |
| 1596 | if (motion_halfpel_index != 3) { |
| 1597 | s->hdsp.put_no_rnd_pixels_tab[1][motion_halfpel_index]( |
| 1598 | output_plane + first_pixel, |
| 1599 | motion_source, stride, 8); |
| 1600 | } else { |
| 1601 | /* d is 0 if motion_x and _y have the same sign, |
| 1602 | * else -1 */ |
| 1603 | int d = (motion_x ^ motion_y) >> 31; |
| 1604 | s->vp3dsp.put_no_rnd_pixels_l2(output_plane + first_pixel, |
| 1605 | motion_source - d, |
| 1606 | motion_source + stride + 1 + d, |
| 1607 | stride, 8); |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | /* invert DCT and place (or add) in final output */ |
| 1612 | |
| 1613 | if (s->all_fragments[i].coding_method == MODE_INTRA) { |
| 1614 | vp3_dequant(s, s->all_fragments + i, |
| 1615 | plane, 0, block); |
| 1616 | s->vp3dsp.idct_put(output_plane + first_pixel, |
| 1617 | stride, |
| 1618 | block); |
| 1619 | } else { |
| 1620 | if (vp3_dequant(s, s->all_fragments + i, |
| 1621 | plane, 1, block)) { |
| 1622 | s->vp3dsp.idct_add(output_plane + first_pixel, |
| 1623 | stride, |
| 1624 | block); |
| 1625 | } else { |
| 1626 | s->vp3dsp.idct_dc_add(output_plane + first_pixel, |
| 1627 | stride, block); |
| 1628 | } |
| 1629 | } |
| 1630 | } else { |
| 1631 | /* copy directly from the previous frame */ |
| 1632 | s->hdsp.put_pixels_tab[1][0]( |
| 1633 | output_plane + first_pixel, |
| 1634 | last_plane + first_pixel, |
| 1635 | stride, 8); |
| 1636 | } |
| 1637 | } |
| 1638 | } |
| 1639 | |
| 1640 | // Filter up to the last row in the superblock row |
| 1641 | if (!s->skip_loop_filter) |
| 1642 | apply_loop_filter(s, plane, 4 * sb_y - !!sb_y, |
| 1643 | FFMIN(4 * sb_y + 3, fragment_height - 1)); |
| 1644 | } |
| 1645 | } |
| 1646 | |
| 1647 | /* this looks like a good place for slice dispatch... */ |
| 1648 | /* algorithm: |
| 1649 | * if (slice == s->macroblock_height - 1) |
| 1650 | * dispatch (both last slice & 2nd-to-last slice); |
| 1651 | * else if (slice > 0) |
| 1652 | * dispatch (slice - 1); |
| 1653 | */ |
| 1654 | |
| 1655 | vp3_draw_horiz_band(s, FFMIN((32 << s->chroma_y_shift) * (slice + 1) - 16, |
| 1656 | s->height - 16)); |
| 1657 | } |
| 1658 | |
| 1659 | /// Allocate tables for per-frame data in Vp3DecodeContext |
| 1660 | static av_cold int allocate_tables(AVCodecContext *avctx) |
| 1661 | { |
| 1662 | Vp3DecodeContext *s = avctx->priv_data; |
| 1663 | int y_fragment_count, c_fragment_count; |
| 1664 | |
| 1665 | free_tables(avctx); |
| 1666 | |
| 1667 | y_fragment_count = s->fragment_width[0] * s->fragment_height[0]; |
| 1668 | c_fragment_count = s->fragment_width[1] * s->fragment_height[1]; |
| 1669 | |
| 1670 | s->superblock_coding = av_mallocz(s->superblock_count); |
| 1671 | s->all_fragments = av_mallocz_array(s->fragment_count, sizeof(Vp3Fragment)); |
| 1672 | |
| 1673 | s->coded_fragment_list[0] = av_mallocz_array(s->fragment_count, sizeof(int)); |
| 1674 | |
| 1675 | s->dct_tokens_base = av_mallocz_array(s->fragment_count, |
| 1676 | 64 * sizeof(*s->dct_tokens_base)); |
| 1677 | s->motion_val[0] = av_mallocz_array(y_fragment_count, sizeof(*s->motion_val[0])); |
| 1678 | s->motion_val[1] = av_mallocz_array(c_fragment_count, sizeof(*s->motion_val[1])); |
| 1679 | |
| 1680 | /* work out the block mapping tables */ |
| 1681 | s->superblock_fragments = av_mallocz_array(s->superblock_count, 16 * sizeof(int)); |
| 1682 | s->macroblock_coding = av_mallocz(s->macroblock_count + 1); |
| 1683 | |
| 1684 | if (!s->superblock_coding || !s->all_fragments || |
| 1685 | !s->dct_tokens_base || !s->coded_fragment_list[0] || |
| 1686 | !s->superblock_fragments || !s->macroblock_coding || |
| 1687 | !s->motion_val[0] || !s->motion_val[1]) { |
| 1688 | vp3_decode_end(avctx); |
| 1689 | return -1; |
| 1690 | } |
| 1691 | |
| 1692 | init_block_mapping(s); |
| 1693 | |
| 1694 | return 0; |
| 1695 | } |
| 1696 | |
| 1697 | static av_cold int init_frames(Vp3DecodeContext *s) |
| 1698 | { |
| 1699 | s->current_frame.f = av_frame_alloc(); |
| 1700 | s->last_frame.f = av_frame_alloc(); |
| 1701 | s->golden_frame.f = av_frame_alloc(); |
| 1702 | |
| 1703 | if (!s->current_frame.f || !s->last_frame.f || !s->golden_frame.f) { |
| 1704 | av_frame_free(&s->current_frame.f); |
| 1705 | av_frame_free(&s->last_frame.f); |
| 1706 | av_frame_free(&s->golden_frame.f); |
| 1707 | return AVERROR(ENOMEM); |
| 1708 | } |
| 1709 | |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | static av_cold int vp3_decode_init(AVCodecContext *avctx) |
| 1714 | { |
| 1715 | Vp3DecodeContext *s = avctx->priv_data; |
| 1716 | int i, inter, plane, ret; |
| 1717 | int c_width; |
| 1718 | int c_height; |
| 1719 | int y_fragment_count, c_fragment_count; |
| 1720 | |
| 1721 | ret = init_frames(s); |
| 1722 | if (ret < 0) |
| 1723 | return ret; |
| 1724 | |
| 1725 | avctx->internal->allocate_progress = 1; |
| 1726 | |
| 1727 | if (avctx->codec_tag == MKTAG('V', 'P', '3', '0')) |
| 1728 | s->version = 0; |
| 1729 | else |
| 1730 | s->version = 1; |
| 1731 | |
| 1732 | s->avctx = avctx; |
| 1733 | s->width = FFALIGN(avctx->width, 16); |
| 1734 | s->height = FFALIGN(avctx->height, 16); |
| 1735 | if (avctx->codec_id != AV_CODEC_ID_THEORA) |
| 1736 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 1737 | avctx->chroma_sample_location = AVCHROMA_LOC_CENTER; |
| 1738 | ff_hpeldsp_init(&s->hdsp, avctx->flags | CODEC_FLAG_BITEXACT); |
| 1739 | ff_videodsp_init(&s->vdsp, 8); |
| 1740 | ff_vp3dsp_init(&s->vp3dsp, avctx->flags); |
| 1741 | |
| 1742 | for (i = 0; i < 64; i++) { |
| 1743 | #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3)) |
| 1744 | s->idct_permutation[i] = TRANSPOSE(i); |
| 1745 | s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]); |
| 1746 | #undef TRANSPOSE |
| 1747 | } |
| 1748 | |
| 1749 | /* initialize to an impossible value which will force a recalculation |
| 1750 | * in the first frame decode */ |
| 1751 | for (i = 0; i < 3; i++) |
| 1752 | s->qps[i] = -1; |
| 1753 | |
| 1754 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift); |
| 1755 | |
| 1756 | s->y_superblock_width = (s->width + 31) / 32; |
| 1757 | s->y_superblock_height = (s->height + 31) / 32; |
| 1758 | s->y_superblock_count = s->y_superblock_width * s->y_superblock_height; |
| 1759 | |
| 1760 | /* work out the dimensions for the C planes */ |
| 1761 | c_width = s->width >> s->chroma_x_shift; |
| 1762 | c_height = s->height >> s->chroma_y_shift; |
| 1763 | s->c_superblock_width = (c_width + 31) / 32; |
| 1764 | s->c_superblock_height = (c_height + 31) / 32; |
| 1765 | s->c_superblock_count = s->c_superblock_width * s->c_superblock_height; |
| 1766 | |
| 1767 | s->superblock_count = s->y_superblock_count + (s->c_superblock_count * 2); |
| 1768 | s->u_superblock_start = s->y_superblock_count; |
| 1769 | s->v_superblock_start = s->u_superblock_start + s->c_superblock_count; |
| 1770 | |
| 1771 | s->macroblock_width = (s->width + 15) / 16; |
| 1772 | s->macroblock_height = (s->height + 15) / 16; |
| 1773 | s->macroblock_count = s->macroblock_width * s->macroblock_height; |
| 1774 | |
| 1775 | s->fragment_width[0] = s->width / FRAGMENT_PIXELS; |
| 1776 | s->fragment_height[0] = s->height / FRAGMENT_PIXELS; |
| 1777 | s->fragment_width[1] = s->fragment_width[0] >> s->chroma_x_shift; |
| 1778 | s->fragment_height[1] = s->fragment_height[0] >> s->chroma_y_shift; |
| 1779 | |
| 1780 | /* fragment count covers all 8x8 blocks for all 3 planes */ |
| 1781 | y_fragment_count = s->fragment_width[0] * s->fragment_height[0]; |
| 1782 | c_fragment_count = s->fragment_width[1] * s->fragment_height[1]; |
| 1783 | s->fragment_count = y_fragment_count + 2 * c_fragment_count; |
| 1784 | s->fragment_start[1] = y_fragment_count; |
| 1785 | s->fragment_start[2] = y_fragment_count + c_fragment_count; |
| 1786 | |
| 1787 | if (!s->theora_tables) { |
| 1788 | for (i = 0; i < 64; i++) { |
| 1789 | s->coded_dc_scale_factor[i] = vp31_dc_scale_factor[i]; |
| 1790 | s->coded_ac_scale_factor[i] = vp31_ac_scale_factor[i]; |
| 1791 | s->base_matrix[0][i] = vp31_intra_y_dequant[i]; |
| 1792 | s->base_matrix[1][i] = vp31_intra_c_dequant[i]; |
| 1793 | s->base_matrix[2][i] = vp31_inter_dequant[i]; |
| 1794 | s->filter_limit_values[i] = vp31_filter_limit_values[i]; |
| 1795 | } |
| 1796 | |
| 1797 | for (inter = 0; inter < 2; inter++) { |
| 1798 | for (plane = 0; plane < 3; plane++) { |
| 1799 | s->qr_count[inter][plane] = 1; |
| 1800 | s->qr_size[inter][plane][0] = 63; |
| 1801 | s->qr_base[inter][plane][0] = |
| 1802 | s->qr_base[inter][plane][1] = 2 * inter + (!!plane) * !inter; |
| 1803 | } |
| 1804 | } |
| 1805 | |
| 1806 | /* init VLC tables */ |
| 1807 | for (i = 0; i < 16; i++) { |
| 1808 | /* DC histograms */ |
| 1809 | init_vlc(&s->dc_vlc[i], 11, 32, |
| 1810 | &dc_bias[i][0][1], 4, 2, |
| 1811 | &dc_bias[i][0][0], 4, 2, 0); |
| 1812 | |
| 1813 | /* group 1 AC histograms */ |
| 1814 | init_vlc(&s->ac_vlc_1[i], 11, 32, |
| 1815 | &ac_bias_0[i][0][1], 4, 2, |
| 1816 | &ac_bias_0[i][0][0], 4, 2, 0); |
| 1817 | |
| 1818 | /* group 2 AC histograms */ |
| 1819 | init_vlc(&s->ac_vlc_2[i], 11, 32, |
| 1820 | &ac_bias_1[i][0][1], 4, 2, |
| 1821 | &ac_bias_1[i][0][0], 4, 2, 0); |
| 1822 | |
| 1823 | /* group 3 AC histograms */ |
| 1824 | init_vlc(&s->ac_vlc_3[i], 11, 32, |
| 1825 | &ac_bias_2[i][0][1], 4, 2, |
| 1826 | &ac_bias_2[i][0][0], 4, 2, 0); |
| 1827 | |
| 1828 | /* group 4 AC histograms */ |
| 1829 | init_vlc(&s->ac_vlc_4[i], 11, 32, |
| 1830 | &ac_bias_3[i][0][1], 4, 2, |
| 1831 | &ac_bias_3[i][0][0], 4, 2, 0); |
| 1832 | } |
| 1833 | } else { |
| 1834 | for (i = 0; i < 16; i++) { |
| 1835 | /* DC histograms */ |
| 1836 | if (init_vlc(&s->dc_vlc[i], 11, 32, |
| 1837 | &s->huffman_table[i][0][1], 8, 4, |
| 1838 | &s->huffman_table[i][0][0], 8, 4, 0) < 0) |
| 1839 | goto vlc_fail; |
| 1840 | |
| 1841 | /* group 1 AC histograms */ |
| 1842 | if (init_vlc(&s->ac_vlc_1[i], 11, 32, |
| 1843 | &s->huffman_table[i + 16][0][1], 8, 4, |
| 1844 | &s->huffman_table[i + 16][0][0], 8, 4, 0) < 0) |
| 1845 | goto vlc_fail; |
| 1846 | |
| 1847 | /* group 2 AC histograms */ |
| 1848 | if (init_vlc(&s->ac_vlc_2[i], 11, 32, |
| 1849 | &s->huffman_table[i + 16 * 2][0][1], 8, 4, |
| 1850 | &s->huffman_table[i + 16 * 2][0][0], 8, 4, 0) < 0) |
| 1851 | goto vlc_fail; |
| 1852 | |
| 1853 | /* group 3 AC histograms */ |
| 1854 | if (init_vlc(&s->ac_vlc_3[i], 11, 32, |
| 1855 | &s->huffman_table[i + 16 * 3][0][1], 8, 4, |
| 1856 | &s->huffman_table[i + 16 * 3][0][0], 8, 4, 0) < 0) |
| 1857 | goto vlc_fail; |
| 1858 | |
| 1859 | /* group 4 AC histograms */ |
| 1860 | if (init_vlc(&s->ac_vlc_4[i], 11, 32, |
| 1861 | &s->huffman_table[i + 16 * 4][0][1], 8, 4, |
| 1862 | &s->huffman_table[i + 16 * 4][0][0], 8, 4, 0) < 0) |
| 1863 | goto vlc_fail; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | init_vlc(&s->superblock_run_length_vlc, 6, 34, |
| 1868 | &superblock_run_length_vlc_table[0][1], 4, 2, |
| 1869 | &superblock_run_length_vlc_table[0][0], 4, 2, 0); |
| 1870 | |
| 1871 | init_vlc(&s->fragment_run_length_vlc, 5, 30, |
| 1872 | &fragment_run_length_vlc_table[0][1], 4, 2, |
| 1873 | &fragment_run_length_vlc_table[0][0], 4, 2, 0); |
| 1874 | |
| 1875 | init_vlc(&s->mode_code_vlc, 3, 8, |
| 1876 | &mode_code_vlc_table[0][1], 2, 1, |
| 1877 | &mode_code_vlc_table[0][0], 2, 1, 0); |
| 1878 | |
| 1879 | init_vlc(&s->motion_vector_vlc, 6, 63, |
| 1880 | &motion_vector_vlc_table[0][1], 2, 1, |
| 1881 | &motion_vector_vlc_table[0][0], 2, 1, 0); |
| 1882 | |
| 1883 | return allocate_tables(avctx); |
| 1884 | |
| 1885 | vlc_fail: |
| 1886 | av_log(avctx, AV_LOG_FATAL, "Invalid huffman table\n"); |
| 1887 | return -1; |
| 1888 | } |
| 1889 | |
| 1890 | /// Release and shuffle frames after decode finishes |
| 1891 | static int update_frames(AVCodecContext *avctx) |
| 1892 | { |
| 1893 | Vp3DecodeContext *s = avctx->priv_data; |
| 1894 | int ret = 0; |
| 1895 | |
| 1896 | /* shuffle frames (last = current) */ |
| 1897 | ff_thread_release_buffer(avctx, &s->last_frame); |
| 1898 | ret = ff_thread_ref_frame(&s->last_frame, &s->current_frame); |
| 1899 | if (ret < 0) |
| 1900 | goto fail; |
| 1901 | |
| 1902 | if (s->keyframe) { |
| 1903 | ff_thread_release_buffer(avctx, &s->golden_frame); |
| 1904 | ret = ff_thread_ref_frame(&s->golden_frame, &s->current_frame); |
| 1905 | } |
| 1906 | |
| 1907 | fail: |
| 1908 | ff_thread_release_buffer(avctx, &s->current_frame); |
| 1909 | return ret; |
| 1910 | } |
| 1911 | |
| 1912 | static int ref_frame(Vp3DecodeContext *s, ThreadFrame *dst, ThreadFrame *src) |
| 1913 | { |
| 1914 | ff_thread_release_buffer(s->avctx, dst); |
| 1915 | if (src->f->data[0]) |
| 1916 | return ff_thread_ref_frame(dst, src); |
| 1917 | return 0; |
| 1918 | } |
| 1919 | |
| 1920 | static int ref_frames(Vp3DecodeContext *dst, Vp3DecodeContext *src) |
| 1921 | { |
| 1922 | int ret; |
| 1923 | if ((ret = ref_frame(dst, &dst->current_frame, &src->current_frame)) < 0 || |
| 1924 | (ret = ref_frame(dst, &dst->golden_frame, &src->golden_frame)) < 0 || |
| 1925 | (ret = ref_frame(dst, &dst->last_frame, &src->last_frame)) < 0) |
| 1926 | return ret; |
| 1927 | return 0; |
| 1928 | } |
| 1929 | |
| 1930 | static int vp3_update_thread_context(AVCodecContext *dst, const AVCodecContext *src) |
| 1931 | { |
| 1932 | Vp3DecodeContext *s = dst->priv_data, *s1 = src->priv_data; |
| 1933 | int qps_changed = 0, i, err; |
| 1934 | |
| 1935 | #define copy_fields(to, from, start_field, end_field) \ |
| 1936 | memcpy(&to->start_field, &from->start_field, \ |
| 1937 | (char *) &to->end_field - (char *) &to->start_field) |
| 1938 | |
| 1939 | if (!s1->current_frame.f->data[0] || |
| 1940 | s->width != s1->width || s->height != s1->height) { |
| 1941 | if (s != s1) |
| 1942 | ref_frames(s, s1); |
| 1943 | return -1; |
| 1944 | } |
| 1945 | |
| 1946 | if (s != s1) { |
| 1947 | // init tables if the first frame hasn't been decoded |
| 1948 | if (!s->current_frame.f->data[0]) { |
| 1949 | int y_fragment_count, c_fragment_count; |
| 1950 | s->avctx = dst; |
| 1951 | err = allocate_tables(dst); |
| 1952 | if (err) |
| 1953 | return err; |
| 1954 | y_fragment_count = s->fragment_width[0] * s->fragment_height[0]; |
| 1955 | c_fragment_count = s->fragment_width[1] * s->fragment_height[1]; |
| 1956 | memcpy(s->motion_val[0], s1->motion_val[0], |
| 1957 | y_fragment_count * sizeof(*s->motion_val[0])); |
| 1958 | memcpy(s->motion_val[1], s1->motion_val[1], |
| 1959 | c_fragment_count * sizeof(*s->motion_val[1])); |
| 1960 | } |
| 1961 | |
| 1962 | // copy previous frame data |
| 1963 | if ((err = ref_frames(s, s1)) < 0) |
| 1964 | return err; |
| 1965 | |
| 1966 | s->keyframe = s1->keyframe; |
| 1967 | |
| 1968 | // copy qscale data if necessary |
| 1969 | for (i = 0; i < 3; i++) { |
| 1970 | if (s->qps[i] != s1->qps[1]) { |
| 1971 | qps_changed = 1; |
| 1972 | memcpy(&s->qmat[i], &s1->qmat[i], sizeof(s->qmat[i])); |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | if (s->qps[0] != s1->qps[0]) |
| 1977 | memcpy(&s->bounding_values_array, &s1->bounding_values_array, |
| 1978 | sizeof(s->bounding_values_array)); |
| 1979 | |
| 1980 | if (qps_changed) |
| 1981 | copy_fields(s, s1, qps, superblock_count); |
| 1982 | #undef copy_fields |
| 1983 | } |
| 1984 | |
| 1985 | return update_frames(dst); |
| 1986 | } |
| 1987 | |
| 1988 | static int vp3_decode_frame(AVCodecContext *avctx, |
| 1989 | void *data, int *got_frame, |
| 1990 | AVPacket *avpkt) |
| 1991 | { |
| 1992 | const uint8_t *buf = avpkt->data; |
| 1993 | int buf_size = avpkt->size; |
| 1994 | Vp3DecodeContext *s = avctx->priv_data; |
| 1995 | GetBitContext gb; |
| 1996 | int i, ret; |
| 1997 | |
| 1998 | init_get_bits(&gb, buf, buf_size * 8); |
| 1999 | |
| 2000 | #if CONFIG_THEORA_DECODER |
| 2001 | if (s->theora && get_bits1(&gb)) { |
| 2002 | int type = get_bits(&gb, 7); |
| 2003 | skip_bits_long(&gb, 6*8); /* "theora" */ |
| 2004 | |
| 2005 | if (s->avctx->active_thread_type&FF_THREAD_FRAME) { |
| 2006 | av_log(avctx, AV_LOG_ERROR, "midstream reconfiguration with multithreading is unsupported, try -threads 1\n"); |
| 2007 | return AVERROR_PATCHWELCOME; |
| 2008 | } |
| 2009 | if (type == 0) { |
| 2010 | vp3_decode_end(avctx); |
| 2011 | ret = theora_decode_header(avctx, &gb); |
| 2012 | |
| 2013 | if (ret < 0) { |
| 2014 | vp3_decode_end(avctx); |
| 2015 | } else |
| 2016 | ret = vp3_decode_init(avctx); |
| 2017 | return ret; |
| 2018 | } else if (type == 2) { |
| 2019 | ret = theora_decode_tables(avctx, &gb); |
| 2020 | if (ret < 0) { |
| 2021 | vp3_decode_end(avctx); |
| 2022 | } else |
| 2023 | ret = vp3_decode_init(avctx); |
| 2024 | return ret; |
| 2025 | } |
| 2026 | |
| 2027 | av_log(avctx, AV_LOG_ERROR, |
| 2028 | "Header packet passed to frame decoder, skipping\n"); |
| 2029 | return -1; |
| 2030 | } |
| 2031 | #endif |
| 2032 | |
| 2033 | s->keyframe = !get_bits1(&gb); |
| 2034 | if (!s->all_fragments) { |
| 2035 | av_log(avctx, AV_LOG_ERROR, "Data packet without prior valid headers\n"); |
| 2036 | return -1; |
| 2037 | } |
| 2038 | if (!s->theora) |
| 2039 | skip_bits(&gb, 1); |
| 2040 | for (i = 0; i < 3; i++) |
| 2041 | s->last_qps[i] = s->qps[i]; |
| 2042 | |
| 2043 | s->nqps = 0; |
| 2044 | do { |
| 2045 | s->qps[s->nqps++] = get_bits(&gb, 6); |
| 2046 | } while (s->theora >= 0x030200 && s->nqps < 3 && get_bits1(&gb)); |
| 2047 | for (i = s->nqps; i < 3; i++) |
| 2048 | s->qps[i] = -1; |
| 2049 | |
| 2050 | if (s->avctx->debug & FF_DEBUG_PICT_INFO) |
| 2051 | av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n", |
| 2052 | s->keyframe ? "key" : "", avctx->frame_number + 1, s->qps[0]); |
| 2053 | |
| 2054 | s->skip_loop_filter = !s->filter_limit_values[s->qps[0]] || |
| 2055 | avctx->skip_loop_filter >= (s->keyframe ? AVDISCARD_ALL |
| 2056 | : AVDISCARD_NONKEY); |
| 2057 | |
| 2058 | if (s->qps[0] != s->last_qps[0]) |
| 2059 | init_loop_filter(s); |
| 2060 | |
| 2061 | for (i = 0; i < s->nqps; i++) |
| 2062 | // reinit all dequantizers if the first one changed, because |
| 2063 | // the DC of the first quantizer must be used for all matrices |
| 2064 | if (s->qps[i] != s->last_qps[i] || s->qps[0] != s->last_qps[0]) |
| 2065 | init_dequantizer(s, i); |
| 2066 | |
| 2067 | if (avctx->skip_frame >= AVDISCARD_NONKEY && !s->keyframe) |
| 2068 | return buf_size; |
| 2069 | |
| 2070 | s->current_frame.f->pict_type = s->keyframe ? AV_PICTURE_TYPE_I |
| 2071 | : AV_PICTURE_TYPE_P; |
| 2072 | s->current_frame.f->key_frame = s->keyframe; |
| 2073 | if (ff_thread_get_buffer(avctx, &s->current_frame, AV_GET_BUFFER_FLAG_REF) < 0) |
| 2074 | goto error; |
| 2075 | |
| 2076 | if (!s->edge_emu_buffer) |
| 2077 | s->edge_emu_buffer = av_malloc(9 * FFABS(s->current_frame.f->linesize[0])); |
| 2078 | |
| 2079 | if (s->keyframe) { |
| 2080 | if (!s->theora) { |
| 2081 | skip_bits(&gb, 4); /* width code */ |
| 2082 | skip_bits(&gb, 4); /* height code */ |
| 2083 | if (s->version) { |
| 2084 | s->version = get_bits(&gb, 5); |
| 2085 | if (avctx->frame_number == 0) |
| 2086 | av_log(s->avctx, AV_LOG_DEBUG, |
| 2087 | "VP version: %d\n", s->version); |
| 2088 | } |
| 2089 | } |
| 2090 | if (s->version || s->theora) { |
| 2091 | if (get_bits1(&gb)) |
| 2092 | av_log(s->avctx, AV_LOG_ERROR, |
| 2093 | "Warning, unsupported keyframe coding type?!\n"); |
| 2094 | skip_bits(&gb, 2); /* reserved? */ |
| 2095 | } |
| 2096 | } else { |
| 2097 | if (!s->golden_frame.f->data[0]) { |
| 2098 | av_log(s->avctx, AV_LOG_WARNING, |
| 2099 | "vp3: first frame not a keyframe\n"); |
| 2100 | |
| 2101 | s->golden_frame.f->pict_type = AV_PICTURE_TYPE_I; |
| 2102 | if (ff_thread_get_buffer(avctx, &s->golden_frame, |
| 2103 | AV_GET_BUFFER_FLAG_REF) < 0) |
| 2104 | goto error; |
| 2105 | ff_thread_release_buffer(avctx, &s->last_frame); |
| 2106 | if ((ret = ff_thread_ref_frame(&s->last_frame, |
| 2107 | &s->golden_frame)) < 0) |
| 2108 | goto error; |
| 2109 | ff_thread_report_progress(&s->last_frame, INT_MAX, 0); |
| 2110 | } |
| 2111 | } |
| 2112 | |
| 2113 | memset(s->all_fragments, 0, s->fragment_count * sizeof(Vp3Fragment)); |
| 2114 | ff_thread_finish_setup(avctx); |
| 2115 | |
| 2116 | if (unpack_superblocks(s, &gb)) { |
| 2117 | av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n"); |
| 2118 | goto error; |
| 2119 | } |
| 2120 | if (unpack_modes(s, &gb)) { |
| 2121 | av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n"); |
| 2122 | goto error; |
| 2123 | } |
| 2124 | if (unpack_vectors(s, &gb)) { |
| 2125 | av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n"); |
| 2126 | goto error; |
| 2127 | } |
| 2128 | if (unpack_block_qpis(s, &gb)) { |
| 2129 | av_log(s->avctx, AV_LOG_ERROR, "error in unpack_block_qpis\n"); |
| 2130 | goto error; |
| 2131 | } |
| 2132 | if (unpack_dct_coeffs(s, &gb)) { |
| 2133 | av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n"); |
| 2134 | goto error; |
| 2135 | } |
| 2136 | |
| 2137 | for (i = 0; i < 3; i++) { |
| 2138 | int height = s->height >> (i && s->chroma_y_shift); |
| 2139 | if (s->flipped_image) |
| 2140 | s->data_offset[i] = 0; |
| 2141 | else |
| 2142 | s->data_offset[i] = (height - 1) * s->current_frame.f->linesize[i]; |
| 2143 | } |
| 2144 | |
| 2145 | s->last_slice_end = 0; |
| 2146 | for (i = 0; i < s->c_superblock_height; i++) |
| 2147 | render_slice(s, i); |
| 2148 | |
| 2149 | // filter the last row |
| 2150 | for (i = 0; i < 3; i++) { |
| 2151 | int row = (s->height >> (3 + (i && s->chroma_y_shift))) - 1; |
| 2152 | apply_loop_filter(s, i, row, row + 1); |
| 2153 | } |
| 2154 | vp3_draw_horiz_band(s, s->avctx->height); |
| 2155 | |
| 2156 | if ((ret = av_frame_ref(data, s->current_frame.f)) < 0) |
| 2157 | return ret; |
| 2158 | *got_frame = 1; |
| 2159 | |
| 2160 | if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME)) { |
| 2161 | ret = update_frames(avctx); |
| 2162 | if (ret < 0) |
| 2163 | return ret; |
| 2164 | } |
| 2165 | |
| 2166 | return buf_size; |
| 2167 | |
| 2168 | error: |
| 2169 | ff_thread_report_progress(&s->current_frame, INT_MAX, 0); |
| 2170 | |
| 2171 | if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME)) |
| 2172 | av_frame_unref(s->current_frame.f); |
| 2173 | |
| 2174 | return -1; |
| 2175 | } |
| 2176 | |
| 2177 | static int read_huffman_tree(AVCodecContext *avctx, GetBitContext *gb) |
| 2178 | { |
| 2179 | Vp3DecodeContext *s = avctx->priv_data; |
| 2180 | |
| 2181 | if (get_bits1(gb)) { |
| 2182 | int token; |
| 2183 | if (s->entries >= 32) { /* overflow */ |
| 2184 | av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n"); |
| 2185 | return -1; |
| 2186 | } |
| 2187 | token = get_bits(gb, 5); |
| 2188 | av_dlog(avctx, "hti %d hbits %x token %d entry : %d size %d\n", |
| 2189 | s->hti, s->hbits, token, s->entries, s->huff_code_size); |
| 2190 | s->huffman_table[s->hti][token][0] = s->hbits; |
| 2191 | s->huffman_table[s->hti][token][1] = s->huff_code_size; |
| 2192 | s->entries++; |
| 2193 | } else { |
| 2194 | if (s->huff_code_size >= 32) { /* overflow */ |
| 2195 | av_log(avctx, AV_LOG_ERROR, "huffman tree overflow\n"); |
| 2196 | return -1; |
| 2197 | } |
| 2198 | s->huff_code_size++; |
| 2199 | s->hbits <<= 1; |
| 2200 | if (read_huffman_tree(avctx, gb)) |
| 2201 | return -1; |
| 2202 | s->hbits |= 1; |
| 2203 | if (read_huffman_tree(avctx, gb)) |
| 2204 | return -1; |
| 2205 | s->hbits >>= 1; |
| 2206 | s->huff_code_size--; |
| 2207 | } |
| 2208 | return 0; |
| 2209 | } |
| 2210 | |
| 2211 | static int vp3_init_thread_copy(AVCodecContext *avctx) |
| 2212 | { |
| 2213 | Vp3DecodeContext *s = avctx->priv_data; |
| 2214 | |
| 2215 | s->superblock_coding = NULL; |
| 2216 | s->all_fragments = NULL; |
| 2217 | s->coded_fragment_list[0] = NULL; |
| 2218 | s->dct_tokens_base = NULL; |
| 2219 | s->superblock_fragments = NULL; |
| 2220 | s->macroblock_coding = NULL; |
| 2221 | s->motion_val[0] = NULL; |
| 2222 | s->motion_val[1] = NULL; |
| 2223 | s->edge_emu_buffer = NULL; |
| 2224 | |
| 2225 | return init_frames(s); |
| 2226 | } |
| 2227 | |
| 2228 | #if CONFIG_THEORA_DECODER |
| 2229 | static const enum AVPixelFormat theora_pix_fmts[4] = { |
| 2230 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P |
| 2231 | }; |
| 2232 | |
| 2233 | static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb) |
| 2234 | { |
| 2235 | Vp3DecodeContext *s = avctx->priv_data; |
| 2236 | int visible_width, visible_height, colorspace; |
| 2237 | int offset_x = 0, offset_y = 0; |
| 2238 | int ret; |
| 2239 | AVRational fps, aspect; |
| 2240 | |
| 2241 | s->theora = get_bits_long(gb, 24); |
| 2242 | av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora); |
| 2243 | |
| 2244 | /* 3.2.0 aka alpha3 has the same frame orientation as original vp3 |
| 2245 | * but previous versions have the image flipped relative to vp3 */ |
| 2246 | if (s->theora < 0x030200) { |
| 2247 | s->flipped_image = 1; |
| 2248 | av_log(avctx, AV_LOG_DEBUG, |
| 2249 | "Old (<alpha3) Theora bitstream, flipped image\n"); |
| 2250 | } |
| 2251 | |
| 2252 | visible_width = |
| 2253 | s->width = get_bits(gb, 16) << 4; |
| 2254 | visible_height = |
| 2255 | s->height = get_bits(gb, 16) << 4; |
| 2256 | |
| 2257 | if (s->theora >= 0x030200) { |
| 2258 | visible_width = get_bits_long(gb, 24); |
| 2259 | visible_height = get_bits_long(gb, 24); |
| 2260 | |
| 2261 | offset_x = get_bits(gb, 8); /* offset x */ |
| 2262 | offset_y = get_bits(gb, 8); /* offset y, from bottom */ |
| 2263 | } |
| 2264 | |
| 2265 | fps.num = get_bits_long(gb, 32); |
| 2266 | fps.den = get_bits_long(gb, 32); |
| 2267 | if (fps.num && fps.den) { |
| 2268 | if (fps.num < 0 || fps.den < 0) { |
| 2269 | av_log(avctx, AV_LOG_ERROR, "Invalid framerate\n"); |
| 2270 | return AVERROR_INVALIDDATA; |
| 2271 | } |
| 2272 | av_reduce(&avctx->time_base.num, &avctx->time_base.den, |
| 2273 | fps.den, fps.num, 1 << 30); |
| 2274 | } |
| 2275 | |
| 2276 | aspect.num = get_bits_long(gb, 24); |
| 2277 | aspect.den = get_bits_long(gb, 24); |
| 2278 | if (aspect.num && aspect.den) { |
| 2279 | av_reduce(&avctx->sample_aspect_ratio.num, |
| 2280 | &avctx->sample_aspect_ratio.den, |
| 2281 | aspect.num, aspect.den, 1 << 30); |
| 2282 | ff_set_sar(avctx, avctx->sample_aspect_ratio); |
| 2283 | } |
| 2284 | |
| 2285 | if (s->theora < 0x030200) |
| 2286 | skip_bits(gb, 5); /* keyframe frequency force */ |
| 2287 | colorspace = get_bits(gb, 8); |
| 2288 | skip_bits(gb, 24); /* bitrate */ |
| 2289 | |
| 2290 | skip_bits(gb, 6); /* quality hint */ |
| 2291 | |
| 2292 | if (s->theora >= 0x030200) { |
| 2293 | skip_bits(gb, 5); /* keyframe frequency force */ |
| 2294 | avctx->pix_fmt = theora_pix_fmts[get_bits(gb, 2)]; |
| 2295 | if (avctx->pix_fmt == AV_PIX_FMT_NONE) { |
| 2296 | av_log(avctx, AV_LOG_ERROR, "Invalid pixel format\n"); |
| 2297 | return AVERROR_INVALIDDATA; |
| 2298 | } |
| 2299 | skip_bits(gb, 3); /* reserved */ |
| 2300 | } |
| 2301 | |
| 2302 | // align_get_bits(gb); |
| 2303 | |
| 2304 | if (visible_width <= s->width && visible_width > s->width - 16 && |
| 2305 | visible_height <= s->height && visible_height > s->height - 16 && |
| 2306 | !offset_x && (offset_y == s->height - visible_height)) |
| 2307 | ret = ff_set_dimensions(avctx, visible_width, visible_height); |
| 2308 | else |
| 2309 | ret = ff_set_dimensions(avctx, s->width, s->height); |
| 2310 | if (ret < 0) |
| 2311 | return ret; |
| 2312 | |
| 2313 | if (colorspace == 1) |
| 2314 | avctx->color_primaries = AVCOL_PRI_BT470M; |
| 2315 | else if (colorspace == 2) |
| 2316 | avctx->color_primaries = AVCOL_PRI_BT470BG; |
| 2317 | |
| 2318 | if (colorspace == 1 || colorspace == 2) { |
| 2319 | avctx->colorspace = AVCOL_SPC_BT470BG; |
| 2320 | avctx->color_trc = AVCOL_TRC_BT709; |
| 2321 | } |
| 2322 | |
| 2323 | return 0; |
| 2324 | } |
| 2325 | |
| 2326 | static int theora_decode_tables(AVCodecContext *avctx, GetBitContext *gb) |
| 2327 | { |
| 2328 | Vp3DecodeContext *s = avctx->priv_data; |
| 2329 | int i, n, matrices, inter, plane; |
| 2330 | |
| 2331 | if (s->theora >= 0x030200) { |
| 2332 | n = get_bits(gb, 3); |
| 2333 | /* loop filter limit values table */ |
| 2334 | if (n) |
| 2335 | for (i = 0; i < 64; i++) |
| 2336 | s->filter_limit_values[i] = get_bits(gb, n); |
| 2337 | } |
| 2338 | |
| 2339 | if (s->theora >= 0x030200) |
| 2340 | n = get_bits(gb, 4) + 1; |
| 2341 | else |
| 2342 | n = 16; |
| 2343 | /* quality threshold table */ |
| 2344 | for (i = 0; i < 64; i++) |
| 2345 | s->coded_ac_scale_factor[i] = get_bits(gb, n); |
| 2346 | |
| 2347 | if (s->theora >= 0x030200) |
| 2348 | n = get_bits(gb, 4) + 1; |
| 2349 | else |
| 2350 | n = 16; |
| 2351 | /* dc scale factor table */ |
| 2352 | for (i = 0; i < 64; i++) |
| 2353 | s->coded_dc_scale_factor[i] = get_bits(gb, n); |
| 2354 | |
| 2355 | if (s->theora >= 0x030200) |
| 2356 | matrices = get_bits(gb, 9) + 1; |
| 2357 | else |
| 2358 | matrices = 3; |
| 2359 | |
| 2360 | if (matrices > 384) { |
| 2361 | av_log(avctx, AV_LOG_ERROR, "invalid number of base matrixes\n"); |
| 2362 | return -1; |
| 2363 | } |
| 2364 | |
| 2365 | for (n = 0; n < matrices; n++) |
| 2366 | for (i = 0; i < 64; i++) |
| 2367 | s->base_matrix[n][i] = get_bits(gb, 8); |
| 2368 | |
| 2369 | for (inter = 0; inter <= 1; inter++) { |
| 2370 | for (plane = 0; plane <= 2; plane++) { |
| 2371 | int newqr = 1; |
| 2372 | if (inter || plane > 0) |
| 2373 | newqr = get_bits1(gb); |
| 2374 | if (!newqr) { |
| 2375 | int qtj, plj; |
| 2376 | if (inter && get_bits1(gb)) { |
| 2377 | qtj = 0; |
| 2378 | plj = plane; |
| 2379 | } else { |
| 2380 | qtj = (3 * inter + plane - 1) / 3; |
| 2381 | plj = (plane + 2) % 3; |
| 2382 | } |
| 2383 | s->qr_count[inter][plane] = s->qr_count[qtj][plj]; |
| 2384 | memcpy(s->qr_size[inter][plane], s->qr_size[qtj][plj], |
| 2385 | sizeof(s->qr_size[0][0])); |
| 2386 | memcpy(s->qr_base[inter][plane], s->qr_base[qtj][plj], |
| 2387 | sizeof(s->qr_base[0][0])); |
| 2388 | } else { |
| 2389 | int qri = 0; |
| 2390 | int qi = 0; |
| 2391 | |
| 2392 | for (;;) { |
| 2393 | i = get_bits(gb, av_log2(matrices - 1) + 1); |
| 2394 | if (i >= matrices) { |
| 2395 | av_log(avctx, AV_LOG_ERROR, |
| 2396 | "invalid base matrix index\n"); |
| 2397 | return -1; |
| 2398 | } |
| 2399 | s->qr_base[inter][plane][qri] = i; |
| 2400 | if (qi >= 63) |
| 2401 | break; |
| 2402 | i = get_bits(gb, av_log2(63 - qi) + 1) + 1; |
| 2403 | s->qr_size[inter][plane][qri++] = i; |
| 2404 | qi += i; |
| 2405 | } |
| 2406 | |
| 2407 | if (qi > 63) { |
| 2408 | av_log(avctx, AV_LOG_ERROR, "invalid qi %d > 63\n", qi); |
| 2409 | return -1; |
| 2410 | } |
| 2411 | s->qr_count[inter][plane] = qri; |
| 2412 | } |
| 2413 | } |
| 2414 | } |
| 2415 | |
| 2416 | /* Huffman tables */ |
| 2417 | for (s->hti = 0; s->hti < 80; s->hti++) { |
| 2418 | s->entries = 0; |
| 2419 | s->huff_code_size = 1; |
| 2420 | if (!get_bits1(gb)) { |
| 2421 | s->hbits = 0; |
| 2422 | if (read_huffman_tree(avctx, gb)) |
| 2423 | return -1; |
| 2424 | s->hbits = 1; |
| 2425 | if (read_huffman_tree(avctx, gb)) |
| 2426 | return -1; |
| 2427 | } |
| 2428 | } |
| 2429 | |
| 2430 | s->theora_tables = 1; |
| 2431 | |
| 2432 | return 0; |
| 2433 | } |
| 2434 | |
| 2435 | static av_cold int theora_decode_init(AVCodecContext *avctx) |
| 2436 | { |
| 2437 | Vp3DecodeContext *s = avctx->priv_data; |
| 2438 | GetBitContext gb; |
| 2439 | int ptype; |
| 2440 | uint8_t *header_start[3]; |
| 2441 | int header_len[3]; |
| 2442 | int i; |
| 2443 | |
| 2444 | avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 2445 | |
| 2446 | s->theora = 1; |
| 2447 | |
| 2448 | if (!avctx->extradata_size) { |
| 2449 | av_log(avctx, AV_LOG_ERROR, "Missing extradata!\n"); |
| 2450 | return -1; |
| 2451 | } |
| 2452 | |
| 2453 | if (avpriv_split_xiph_headers(avctx->extradata, avctx->extradata_size, |
| 2454 | 42, header_start, header_len) < 0) { |
| 2455 | av_log(avctx, AV_LOG_ERROR, "Corrupt extradata\n"); |
| 2456 | return -1; |
| 2457 | } |
| 2458 | |
| 2459 | for (i = 0; i < 3; i++) { |
| 2460 | if (header_len[i] <= 0) |
| 2461 | continue; |
| 2462 | init_get_bits(&gb, header_start[i], header_len[i] * 8); |
| 2463 | |
| 2464 | ptype = get_bits(&gb, 8); |
| 2465 | |
| 2466 | if (!(ptype & 0x80)) { |
| 2467 | av_log(avctx, AV_LOG_ERROR, "Invalid extradata!\n"); |
| 2468 | // return -1; |
| 2469 | } |
| 2470 | |
| 2471 | // FIXME: Check for this as well. |
| 2472 | skip_bits_long(&gb, 6 * 8); /* "theora" */ |
| 2473 | |
| 2474 | switch (ptype) { |
| 2475 | case 0x80: |
| 2476 | if (theora_decode_header(avctx, &gb) < 0) |
| 2477 | return -1; |
| 2478 | break; |
| 2479 | case 0x81: |
| 2480 | // FIXME: is this needed? it breaks sometimes |
| 2481 | // theora_decode_comments(avctx, gb); |
| 2482 | break; |
| 2483 | case 0x82: |
| 2484 | if (theora_decode_tables(avctx, &gb)) |
| 2485 | return -1; |
| 2486 | break; |
| 2487 | default: |
| 2488 | av_log(avctx, AV_LOG_ERROR, |
| 2489 | "Unknown Theora config packet: %d\n", ptype & ~0x80); |
| 2490 | break; |
| 2491 | } |
| 2492 | if (ptype != 0x81 && 8 * header_len[i] != get_bits_count(&gb)) |
| 2493 | av_log(avctx, AV_LOG_WARNING, |
| 2494 | "%d bits left in packet %X\n", |
| 2495 | 8 * header_len[i] - get_bits_count(&gb), ptype); |
| 2496 | if (s->theora < 0x030200) |
| 2497 | break; |
| 2498 | } |
| 2499 | |
| 2500 | return vp3_decode_init(avctx); |
| 2501 | } |
| 2502 | |
| 2503 | AVCodec ff_theora_decoder = { |
| 2504 | .name = "theora", |
| 2505 | .long_name = NULL_IF_CONFIG_SMALL("Theora"), |
| 2506 | .type = AVMEDIA_TYPE_VIDEO, |
| 2507 | .id = AV_CODEC_ID_THEORA, |
| 2508 | .priv_data_size = sizeof(Vp3DecodeContext), |
| 2509 | .init = theora_decode_init, |
| 2510 | .close = vp3_decode_end, |
| 2511 | .decode = vp3_decode_frame, |
| 2512 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | |
| 2513 | CODEC_CAP_FRAME_THREADS, |
| 2514 | .flush = vp3_decode_flush, |
| 2515 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy), |
| 2516 | .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context) |
| 2517 | }; |
| 2518 | #endif |
| 2519 | |
| 2520 | AVCodec ff_vp3_decoder = { |
| 2521 | .name = "vp3", |
| 2522 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP3"), |
| 2523 | .type = AVMEDIA_TYPE_VIDEO, |
| 2524 | .id = AV_CODEC_ID_VP3, |
| 2525 | .priv_data_size = sizeof(Vp3DecodeContext), |
| 2526 | .init = vp3_decode_init, |
| 2527 | .close = vp3_decode_end, |
| 2528 | .decode = vp3_decode_frame, |
| 2529 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | |
| 2530 | CODEC_CAP_FRAME_THREADS, |
| 2531 | .flush = vp3_decode_flush, |
| 2532 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy), |
| 2533 | .update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context), |
| 2534 | }; |