| 1 | /* |
| 2 | * Copyright (C) 2007 Marco Gerards <marco@gnu.org> |
| 3 | * Copyright (C) 2009 David Conrad |
| 4 | * Copyright (C) 2011 Jordi Ortiz |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | /** |
| 24 | * @file |
| 25 | * Dirac Decoder |
| 26 | * @author Marco Gerards <marco@gnu.org>, David Conrad, Jordi Ortiz <nenjordi@gmail.com> |
| 27 | */ |
| 28 | |
| 29 | #include "avcodec.h" |
| 30 | #include "get_bits.h" |
| 31 | #include "bytestream.h" |
| 32 | #include "internal.h" |
| 33 | #include "golomb.h" |
| 34 | #include "dirac_arith.h" |
| 35 | #include "mpeg12data.h" |
| 36 | #include "libavcodec/mpegvideo.h" |
| 37 | #include "mpegvideoencdsp.h" |
| 38 | #include "dirac_dwt.h" |
| 39 | #include "dirac.h" |
| 40 | #include "diracdsp.h" |
| 41 | #include "videodsp.h" |
| 42 | |
| 43 | /** |
| 44 | * The spec limits the number of wavelet decompositions to 4 for both |
| 45 | * level 1 (VC-2) and 128 (long-gop default). |
| 46 | * 5 decompositions is the maximum before >16-bit buffers are needed. |
| 47 | * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting |
| 48 | * the others to 4 decompositions (or 3 for the fidelity filter). |
| 49 | * |
| 50 | * We use this instead of MAX_DECOMPOSITIONS to save some memory. |
| 51 | */ |
| 52 | #define MAX_DWT_LEVELS 5 |
| 53 | |
| 54 | /** |
| 55 | * The spec limits this to 3 for frame coding, but in practice can be as high as 6 |
| 56 | */ |
| 57 | #define MAX_REFERENCE_FRAMES 8 |
| 58 | #define MAX_DELAY 5 /* limit for main profile for frame coding (TODO: field coding) */ |
| 59 | #define MAX_FRAMES (MAX_REFERENCE_FRAMES + MAX_DELAY + 1) |
| 60 | #define MAX_QUANT 68 /* max quant for VC-2 */ |
| 61 | #define MAX_BLOCKSIZE 32 /* maximum xblen/yblen we support */ |
| 62 | |
| 63 | /** |
| 64 | * DiracBlock->ref flags, if set then the block does MC from the given ref |
| 65 | */ |
| 66 | #define DIRAC_REF_MASK_REF1 1 |
| 67 | #define DIRAC_REF_MASK_REF2 2 |
| 68 | #define DIRAC_REF_MASK_GLOBAL 4 |
| 69 | |
| 70 | /** |
| 71 | * Value of Picture.reference when Picture is not a reference picture, but |
| 72 | * is held for delayed output. |
| 73 | */ |
| 74 | #define DELAYED_PIC_REF 4 |
| 75 | |
| 76 | #define CALC_PADDING(size, depth) \ |
| 77 | (((size + (1 << depth) - 1) >> depth) << depth) |
| 78 | |
| 79 | #define DIVRNDUP(a, b) (((a) + (b) - 1) / (b)) |
| 80 | |
| 81 | typedef struct { |
| 82 | AVFrame *avframe; |
| 83 | int interpolated[3]; /* 1 if hpel[] is valid */ |
| 84 | uint8_t *hpel[3][4]; |
| 85 | uint8_t *hpel_base[3][4]; |
| 86 | } DiracFrame; |
| 87 | |
| 88 | typedef struct { |
| 89 | union { |
| 90 | int16_t mv[2][2]; |
| 91 | int16_t dc[3]; |
| 92 | } u; /* anonymous unions aren't in C99 :( */ |
| 93 | uint8_t ref; |
| 94 | } DiracBlock; |
| 95 | |
| 96 | typedef struct SubBand { |
| 97 | int level; |
| 98 | int orientation; |
| 99 | int stride; |
| 100 | int width; |
| 101 | int height; |
| 102 | int quant; |
| 103 | IDWTELEM *ibuf; |
| 104 | struct SubBand *parent; |
| 105 | |
| 106 | /* for low delay */ |
| 107 | unsigned length; |
| 108 | const uint8_t *coeff_data; |
| 109 | } SubBand; |
| 110 | |
| 111 | typedef struct Plane { |
| 112 | int width; |
| 113 | int height; |
| 114 | ptrdiff_t stride; |
| 115 | |
| 116 | int idwt_width; |
| 117 | int idwt_height; |
| 118 | int idwt_stride; |
| 119 | IDWTELEM *idwt_buf; |
| 120 | IDWTELEM *idwt_buf_base; |
| 121 | IDWTELEM *idwt_tmp; |
| 122 | |
| 123 | /* block length */ |
| 124 | uint8_t xblen; |
| 125 | uint8_t yblen; |
| 126 | /* block separation (block n+1 starts after this many pixels in block n) */ |
| 127 | uint8_t xbsep; |
| 128 | uint8_t ybsep; |
| 129 | /* amount of overspill on each edge (half of the overlap between blocks) */ |
| 130 | uint8_t xoffset; |
| 131 | uint8_t yoffset; |
| 132 | |
| 133 | SubBand band[MAX_DWT_LEVELS][4]; |
| 134 | } Plane; |
| 135 | |
| 136 | typedef struct DiracContext { |
| 137 | AVCodecContext *avctx; |
| 138 | MpegvideoEncDSPContext mpvencdsp; |
| 139 | VideoDSPContext vdsp; |
| 140 | DiracDSPContext diracdsp; |
| 141 | GetBitContext gb; |
| 142 | dirac_source_params source; |
| 143 | int seen_sequence_header; |
| 144 | int frame_number; /* number of the next frame to display */ |
| 145 | Plane plane[3]; |
| 146 | int chroma_x_shift; |
| 147 | int chroma_y_shift; |
| 148 | |
| 149 | int zero_res; /* zero residue flag */ |
| 150 | int is_arith; /* whether coeffs use arith or golomb coding */ |
| 151 | int low_delay; /* use the low delay syntax */ |
| 152 | int globalmc_flag; /* use global motion compensation */ |
| 153 | int num_refs; /* number of reference pictures */ |
| 154 | |
| 155 | /* wavelet decoding */ |
| 156 | unsigned wavelet_depth; /* depth of the IDWT */ |
| 157 | unsigned wavelet_idx; |
| 158 | |
| 159 | /** |
| 160 | * schroedinger older than 1.0.8 doesn't store |
| 161 | * quant delta if only one codebook exists in a band |
| 162 | */ |
| 163 | unsigned old_delta_quant; |
| 164 | unsigned codeblock_mode; |
| 165 | |
| 166 | struct { |
| 167 | unsigned width; |
| 168 | unsigned height; |
| 169 | } codeblock[MAX_DWT_LEVELS+1]; |
| 170 | |
| 171 | struct { |
| 172 | unsigned num_x; /* number of horizontal slices */ |
| 173 | unsigned num_y; /* number of vertical slices */ |
| 174 | AVRational bytes; /* average bytes per slice */ |
| 175 | uint8_t quant[MAX_DWT_LEVELS][4]; /* [DIRAC_STD] E.1 */ |
| 176 | } lowdelay; |
| 177 | |
| 178 | struct { |
| 179 | int pan_tilt[2]; /* pan/tilt vector */ |
| 180 | int zrs[2][2]; /* zoom/rotate/shear matrix */ |
| 181 | int perspective[2]; /* perspective vector */ |
| 182 | unsigned zrs_exp; |
| 183 | unsigned perspective_exp; |
| 184 | } globalmc[2]; |
| 185 | |
| 186 | /* motion compensation */ |
| 187 | uint8_t mv_precision; /* [DIRAC_STD] REFS_WT_PRECISION */ |
| 188 | int16_t weight[2]; /* [DIRAC_STD] REF1_WT and REF2_WT */ |
| 189 | unsigned weight_log2denom; /* [DIRAC_STD] REFS_WT_PRECISION */ |
| 190 | |
| 191 | int blwidth; /* number of blocks (horizontally) */ |
| 192 | int blheight; /* number of blocks (vertically) */ |
| 193 | int sbwidth; /* number of superblocks (horizontally) */ |
| 194 | int sbheight; /* number of superblocks (vertically) */ |
| 195 | |
| 196 | uint8_t *sbsplit; |
| 197 | DiracBlock *blmotion; |
| 198 | |
| 199 | uint8_t *edge_emu_buffer[4]; |
| 200 | uint8_t *edge_emu_buffer_base; |
| 201 | |
| 202 | uint16_t *mctmp; /* buffer holding the MC data multiplied by OBMC weights */ |
| 203 | uint8_t *mcscratch; |
| 204 | int buffer_stride; |
| 205 | |
| 206 | DECLARE_ALIGNED(16, uint8_t, obmc_weight)[3][MAX_BLOCKSIZE*MAX_BLOCKSIZE]; |
| 207 | |
| 208 | void (*put_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); |
| 209 | void (*avg_pixels_tab[4])(uint8_t *dst, const uint8_t *src[5], int stride, int h); |
| 210 | void (*add_obmc)(uint16_t *dst, const uint8_t *src, int stride, const uint8_t *obmc_weight, int yblen); |
| 211 | dirac_weight_func weight_func; |
| 212 | dirac_biweight_func biweight_func; |
| 213 | |
| 214 | DiracFrame *current_picture; |
| 215 | DiracFrame *ref_pics[2]; |
| 216 | |
| 217 | DiracFrame *ref_frames[MAX_REFERENCE_FRAMES+1]; |
| 218 | DiracFrame *delay_frames[MAX_DELAY+1]; |
| 219 | DiracFrame all_frames[MAX_FRAMES]; |
| 220 | } DiracContext; |
| 221 | |
| 222 | /** |
| 223 | * Dirac Specification -> |
| 224 | * Parse code values. 9.6.1 Table 9.1 |
| 225 | */ |
| 226 | enum dirac_parse_code { |
| 227 | pc_seq_header = 0x00, |
| 228 | pc_eos = 0x10, |
| 229 | pc_aux_data = 0x20, |
| 230 | pc_padding = 0x30, |
| 231 | }; |
| 232 | |
| 233 | enum dirac_subband { |
| 234 | subband_ll = 0, |
| 235 | subband_hl = 1, |
| 236 | subband_lh = 2, |
| 237 | subband_hh = 3, |
| 238 | subband_nb, |
| 239 | }; |
| 240 | |
| 241 | static const uint8_t default_qmat[][4][4] = { |
| 242 | { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, |
| 243 | { { 4, 2, 2, 0}, { 0, 4, 4, 2}, { 0, 5, 5, 3}, { 0, 7, 7, 5} }, |
| 244 | { { 5, 3, 3, 0}, { 0, 4, 4, 1}, { 0, 5, 5, 2}, { 0, 6, 6, 3} }, |
| 245 | { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, |
| 246 | { { 8, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0}, { 0, 4, 4, 0} }, |
| 247 | { { 0, 4, 4, 8}, { 0, 8, 8, 12}, { 0, 13, 13, 17}, { 0, 17, 17, 21} }, |
| 248 | { { 3, 1, 1, 0}, { 0, 4, 4, 2}, { 0, 6, 6, 5}, { 0, 9, 9, 7} }, |
| 249 | }; |
| 250 | |
| 251 | static const int qscale_tab[MAX_QUANT+1] = { |
| 252 | 4, 5, 6, 7, 8, 10, 11, 13, |
| 253 | 16, 19, 23, 27, 32, 38, 45, 54, |
| 254 | 64, 76, 91, 108, 128, 152, 181, 215, |
| 255 | 256, 304, 362, 431, 512, 609, 724, 861, |
| 256 | 1024, 1218, 1448, 1722, 2048, 2435, 2896, 3444, |
| 257 | 4096, 4871, 5793, 6889, 8192, 9742, 11585, 13777, |
| 258 | 16384, 19484, 23170, 27554, 32768, 38968, 46341, 55109, |
| 259 | 65536, 77936 |
| 260 | }; |
| 261 | |
| 262 | static const int qoffset_intra_tab[MAX_QUANT+1] = { |
| 263 | 1, 2, 3, 4, 4, 5, 6, 7, |
| 264 | 8, 10, 12, 14, 16, 19, 23, 27, |
| 265 | 32, 38, 46, 54, 64, 76, 91, 108, |
| 266 | 128, 152, 181, 216, 256, 305, 362, 431, |
| 267 | 512, 609, 724, 861, 1024, 1218, 1448, 1722, |
| 268 | 2048, 2436, 2897, 3445, 4096, 4871, 5793, 6889, |
| 269 | 8192, 9742, 11585, 13777, 16384, 19484, 23171, 27555, |
| 270 | 32768, 38968 |
| 271 | }; |
| 272 | |
| 273 | static const int qoffset_inter_tab[MAX_QUANT+1] = { |
| 274 | 1, 2, 2, 3, 3, 4, 4, 5, |
| 275 | 6, 7, 9, 10, 12, 14, 17, 20, |
| 276 | 24, 29, 34, 41, 48, 57, 68, 81, |
| 277 | 96, 114, 136, 162, 192, 228, 272, 323, |
| 278 | 384, 457, 543, 646, 768, 913, 1086, 1292, |
| 279 | 1536, 1827, 2172, 2583, 3072, 3653, 4344, 5166, |
| 280 | 6144, 7307, 8689, 10333, 12288, 14613, 17378, 20666, |
| 281 | 24576, 29226 |
| 282 | }; |
| 283 | |
| 284 | /* magic number division by 3 from schroedinger */ |
| 285 | static inline int divide3(int x) |
| 286 | { |
| 287 | return ((x+1)*21845 + 10922) >> 16; |
| 288 | } |
| 289 | |
| 290 | static DiracFrame *remove_frame(DiracFrame *framelist[], int picnum) |
| 291 | { |
| 292 | DiracFrame *remove_pic = NULL; |
| 293 | int i, remove_idx = -1; |
| 294 | |
| 295 | for (i = 0; framelist[i]; i++) |
| 296 | if (framelist[i]->avframe->display_picture_number == picnum) { |
| 297 | remove_pic = framelist[i]; |
| 298 | remove_idx = i; |
| 299 | } |
| 300 | |
| 301 | if (remove_pic) |
| 302 | for (i = remove_idx; framelist[i]; i++) |
| 303 | framelist[i] = framelist[i+1]; |
| 304 | |
| 305 | return remove_pic; |
| 306 | } |
| 307 | |
| 308 | static int add_frame(DiracFrame *framelist[], int maxframes, DiracFrame *frame) |
| 309 | { |
| 310 | int i; |
| 311 | for (i = 0; i < maxframes; i++) |
| 312 | if (!framelist[i]) { |
| 313 | framelist[i] = frame; |
| 314 | return 0; |
| 315 | } |
| 316 | return -1; |
| 317 | } |
| 318 | |
| 319 | static int alloc_sequence_buffers(DiracContext *s) |
| 320 | { |
| 321 | int sbwidth = DIVRNDUP(s->source.width, 4); |
| 322 | int sbheight = DIVRNDUP(s->source.height, 4); |
| 323 | int i, w, h, top_padding; |
| 324 | |
| 325 | /* todo: think more about this / use or set Plane here */ |
| 326 | for (i = 0; i < 3; i++) { |
| 327 | int max_xblen = MAX_BLOCKSIZE >> (i ? s->chroma_x_shift : 0); |
| 328 | int max_yblen = MAX_BLOCKSIZE >> (i ? s->chroma_y_shift : 0); |
| 329 | w = s->source.width >> (i ? s->chroma_x_shift : 0); |
| 330 | h = s->source.height >> (i ? s->chroma_y_shift : 0); |
| 331 | |
| 332 | /* we allocate the max we support here since num decompositions can |
| 333 | * change from frame to frame. Stride is aligned to 16 for SIMD, and |
| 334 | * 1<<MAX_DWT_LEVELS top padding to avoid if(y>0) in arith decoding |
| 335 | * MAX_BLOCKSIZE padding for MC: blocks can spill up to half of that |
| 336 | * on each side */ |
| 337 | top_padding = FFMAX(1<<MAX_DWT_LEVELS, max_yblen/2); |
| 338 | w = FFALIGN(CALC_PADDING(w, MAX_DWT_LEVELS), 8); /* FIXME: Should this be 16 for SSE??? */ |
| 339 | h = top_padding + CALC_PADDING(h, MAX_DWT_LEVELS) + max_yblen/2; |
| 340 | |
| 341 | s->plane[i].idwt_buf_base = av_mallocz_array((w+max_xblen), h * sizeof(IDWTELEM)); |
| 342 | s->plane[i].idwt_tmp = av_malloc_array((w+16), sizeof(IDWTELEM)); |
| 343 | s->plane[i].idwt_buf = s->plane[i].idwt_buf_base + top_padding*w; |
| 344 | if (!s->plane[i].idwt_buf_base || !s->plane[i].idwt_tmp) |
| 345 | return AVERROR(ENOMEM); |
| 346 | } |
| 347 | |
| 348 | /* fixme: allocate using real stride here */ |
| 349 | s->sbsplit = av_malloc_array(sbwidth, sbheight); |
| 350 | s->blmotion = av_malloc_array(sbwidth, sbheight * 16 * sizeof(*s->blmotion)); |
| 351 | |
| 352 | if (!s->sbsplit || !s->blmotion) |
| 353 | return AVERROR(ENOMEM); |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static int alloc_buffers(DiracContext *s, int stride) |
| 358 | { |
| 359 | int w = s->source.width; |
| 360 | int h = s->source.height; |
| 361 | |
| 362 | av_assert0(stride >= w); |
| 363 | stride += 64; |
| 364 | |
| 365 | if (s->buffer_stride >= stride) |
| 366 | return 0; |
| 367 | s->buffer_stride = 0; |
| 368 | |
| 369 | av_freep(&s->edge_emu_buffer_base); |
| 370 | memset(s->edge_emu_buffer, 0, sizeof(s->edge_emu_buffer)); |
| 371 | av_freep(&s->mctmp); |
| 372 | av_freep(&s->mcscratch); |
| 373 | |
| 374 | s->edge_emu_buffer_base = av_malloc_array(stride, MAX_BLOCKSIZE); |
| 375 | |
| 376 | s->mctmp = av_malloc_array((stride+MAX_BLOCKSIZE), (h+MAX_BLOCKSIZE) * sizeof(*s->mctmp)); |
| 377 | s->mcscratch = av_malloc_array(stride, MAX_BLOCKSIZE); |
| 378 | |
| 379 | if (!s->edge_emu_buffer_base || !s->mctmp || !s->mcscratch) |
| 380 | return AVERROR(ENOMEM); |
| 381 | |
| 382 | s->buffer_stride = stride; |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | static void free_sequence_buffers(DiracContext *s) |
| 387 | { |
| 388 | int i, j, k; |
| 389 | |
| 390 | for (i = 0; i < MAX_FRAMES; i++) { |
| 391 | if (s->all_frames[i].avframe->data[0]) { |
| 392 | av_frame_unref(s->all_frames[i].avframe); |
| 393 | memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); |
| 394 | } |
| 395 | |
| 396 | for (j = 0; j < 3; j++) |
| 397 | for (k = 1; k < 4; k++) |
| 398 | av_freep(&s->all_frames[i].hpel_base[j][k]); |
| 399 | } |
| 400 | |
| 401 | memset(s->ref_frames, 0, sizeof(s->ref_frames)); |
| 402 | memset(s->delay_frames, 0, sizeof(s->delay_frames)); |
| 403 | |
| 404 | for (i = 0; i < 3; i++) { |
| 405 | av_freep(&s->plane[i].idwt_buf_base); |
| 406 | av_freep(&s->plane[i].idwt_tmp); |
| 407 | } |
| 408 | |
| 409 | s->buffer_stride = 0; |
| 410 | av_freep(&s->sbsplit); |
| 411 | av_freep(&s->blmotion); |
| 412 | av_freep(&s->edge_emu_buffer_base); |
| 413 | |
| 414 | av_freep(&s->mctmp); |
| 415 | av_freep(&s->mcscratch); |
| 416 | } |
| 417 | |
| 418 | static av_cold int dirac_decode_init(AVCodecContext *avctx) |
| 419 | { |
| 420 | DiracContext *s = avctx->priv_data; |
| 421 | int i; |
| 422 | |
| 423 | s->avctx = avctx; |
| 424 | s->frame_number = -1; |
| 425 | |
| 426 | ff_diracdsp_init(&s->diracdsp); |
| 427 | ff_mpegvideoencdsp_init(&s->mpvencdsp, avctx); |
| 428 | ff_videodsp_init(&s->vdsp, 8); |
| 429 | |
| 430 | for (i = 0; i < MAX_FRAMES; i++) { |
| 431 | s->all_frames[i].avframe = av_frame_alloc(); |
| 432 | if (!s->all_frames[i].avframe) { |
| 433 | while (i > 0) |
| 434 | av_frame_free(&s->all_frames[--i].avframe); |
| 435 | return AVERROR(ENOMEM); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | return 0; |
| 440 | } |
| 441 | |
| 442 | static void dirac_decode_flush(AVCodecContext *avctx) |
| 443 | { |
| 444 | DiracContext *s = avctx->priv_data; |
| 445 | free_sequence_buffers(s); |
| 446 | s->seen_sequence_header = 0; |
| 447 | s->frame_number = -1; |
| 448 | } |
| 449 | |
| 450 | static av_cold int dirac_decode_end(AVCodecContext *avctx) |
| 451 | { |
| 452 | DiracContext *s = avctx->priv_data; |
| 453 | int i; |
| 454 | |
| 455 | dirac_decode_flush(avctx); |
| 456 | for (i = 0; i < MAX_FRAMES; i++) |
| 457 | av_frame_free(&s->all_frames[i].avframe); |
| 458 | |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | #define SIGN_CTX(x) (CTX_SIGN_ZERO + ((x) > 0) - ((x) < 0)) |
| 463 | |
| 464 | static inline void coeff_unpack_arith(DiracArith *c, int qfactor, int qoffset, |
| 465 | SubBand *b, IDWTELEM *buf, int x, int y) |
| 466 | { |
| 467 | int coeff, sign; |
| 468 | int sign_pred = 0; |
| 469 | int pred_ctx = CTX_ZPZN_F1; |
| 470 | |
| 471 | /* Check if the parent subband has a 0 in the corresponding position */ |
| 472 | if (b->parent) |
| 473 | pred_ctx += !!b->parent->ibuf[b->parent->stride * (y>>1) + (x>>1)] << 1; |
| 474 | |
| 475 | if (b->orientation == subband_hl) |
| 476 | sign_pred = buf[-b->stride]; |
| 477 | |
| 478 | /* Determine if the pixel has only zeros in its neighbourhood */ |
| 479 | if (x) { |
| 480 | pred_ctx += !(buf[-1] | buf[-b->stride] | buf[-1-b->stride]); |
| 481 | if (b->orientation == subband_lh) |
| 482 | sign_pred = buf[-1]; |
| 483 | } else { |
| 484 | pred_ctx += !buf[-b->stride]; |
| 485 | } |
| 486 | |
| 487 | coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); |
| 488 | if (coeff) { |
| 489 | coeff = (coeff * qfactor + qoffset + 2) >> 2; |
| 490 | sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); |
| 491 | coeff = (coeff ^ -sign) + sign; |
| 492 | } |
| 493 | *buf = coeff; |
| 494 | } |
| 495 | |
| 496 | static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffset) |
| 497 | { |
| 498 | int sign, coeff; |
| 499 | |
| 500 | coeff = svq3_get_ue_golomb(gb); |
| 501 | if (coeff) { |
| 502 | coeff = (coeff * qfactor + qoffset + 2) >> 2; |
| 503 | sign = get_bits1(gb); |
| 504 | coeff = (coeff ^ -sign) + sign; |
| 505 | } |
| 506 | return coeff; |
| 507 | } |
| 508 | |
| 509 | /** |
| 510 | * Decode the coeffs in the rectangle defined by left, right, top, bottom |
| 511 | * [DIRAC_STD] 13.4.3.2 Codeblock unpacking loop. codeblock() |
| 512 | */ |
| 513 | static inline void codeblock(DiracContext *s, SubBand *b, |
| 514 | GetBitContext *gb, DiracArith *c, |
| 515 | int left, int right, int top, int bottom, |
| 516 | int blockcnt_one, int is_arith) |
| 517 | { |
| 518 | int x, y, zero_block; |
| 519 | int qoffset, qfactor; |
| 520 | IDWTELEM *buf; |
| 521 | |
| 522 | /* check for any coded coefficients in this codeblock */ |
| 523 | if (!blockcnt_one) { |
| 524 | if (is_arith) |
| 525 | zero_block = dirac_get_arith_bit(c, CTX_ZERO_BLOCK); |
| 526 | else |
| 527 | zero_block = get_bits1(gb); |
| 528 | |
| 529 | if (zero_block) |
| 530 | return; |
| 531 | } |
| 532 | |
| 533 | if (s->codeblock_mode && !(s->old_delta_quant && blockcnt_one)) { |
| 534 | int quant = b->quant; |
| 535 | if (is_arith) |
| 536 | quant += dirac_get_arith_int(c, CTX_DELTA_Q_F, CTX_DELTA_Q_DATA); |
| 537 | else |
| 538 | quant += dirac_get_se_golomb(gb); |
| 539 | if (quant < 0) { |
| 540 | av_log(s->avctx, AV_LOG_ERROR, "Invalid quant\n"); |
| 541 | return; |
| 542 | } |
| 543 | b->quant = quant; |
| 544 | } |
| 545 | |
| 546 | b->quant = FFMIN(b->quant, MAX_QUANT); |
| 547 | |
| 548 | qfactor = qscale_tab[b->quant]; |
| 549 | /* TODO: context pointer? */ |
| 550 | if (!s->num_refs) |
| 551 | qoffset = qoffset_intra_tab[b->quant]; |
| 552 | else |
| 553 | qoffset = qoffset_inter_tab[b->quant]; |
| 554 | |
| 555 | buf = b->ibuf + top * b->stride; |
| 556 | for (y = top; y < bottom; y++) { |
| 557 | for (x = left; x < right; x++) { |
| 558 | /* [DIRAC_STD] 13.4.4 Subband coefficients. coeff_unpack() */ |
| 559 | if (is_arith) |
| 560 | coeff_unpack_arith(c, qfactor, qoffset, b, buf+x, x, y); |
| 561 | else |
| 562 | buf[x] = coeff_unpack_golomb(gb, qfactor, qoffset); |
| 563 | } |
| 564 | buf += b->stride; |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Dirac Specification -> |
| 570 | * 13.3 intra_dc_prediction(band) |
| 571 | */ |
| 572 | static inline void intra_dc_prediction(SubBand *b) |
| 573 | { |
| 574 | IDWTELEM *buf = b->ibuf; |
| 575 | int x, y; |
| 576 | |
| 577 | for (x = 1; x < b->width; x++) |
| 578 | buf[x] += buf[x-1]; |
| 579 | buf += b->stride; |
| 580 | |
| 581 | for (y = 1; y < b->height; y++) { |
| 582 | buf[0] += buf[-b->stride]; |
| 583 | |
| 584 | for (x = 1; x < b->width; x++) { |
| 585 | int pred = buf[x - 1] + buf[x - b->stride] + buf[x - b->stride-1]; |
| 586 | buf[x] += divide3(pred); |
| 587 | } |
| 588 | buf += b->stride; |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * Dirac Specification -> |
| 594 | * 13.4.2 Non-skipped subbands. subband_coeffs() |
| 595 | */ |
| 596 | static av_always_inline void decode_subband_internal(DiracContext *s, SubBand *b, int is_arith) |
| 597 | { |
| 598 | int cb_x, cb_y, left, right, top, bottom; |
| 599 | DiracArith c; |
| 600 | GetBitContext gb; |
| 601 | int cb_width = s->codeblock[b->level + (b->orientation != subband_ll)].width; |
| 602 | int cb_height = s->codeblock[b->level + (b->orientation != subband_ll)].height; |
| 603 | int blockcnt_one = (cb_width + cb_height) == 2; |
| 604 | |
| 605 | if (!b->length) |
| 606 | return; |
| 607 | |
| 608 | init_get_bits8(&gb, b->coeff_data, b->length); |
| 609 | |
| 610 | if (is_arith) |
| 611 | ff_dirac_init_arith_decoder(&c, &gb, b->length); |
| 612 | |
| 613 | top = 0; |
| 614 | for (cb_y = 0; cb_y < cb_height; cb_y++) { |
| 615 | bottom = (b->height * (cb_y+1LL)) / cb_height; |
| 616 | left = 0; |
| 617 | for (cb_x = 0; cb_x < cb_width; cb_x++) { |
| 618 | right = (b->width * (cb_x+1LL)) / cb_width; |
| 619 | codeblock(s, b, &gb, &c, left, right, top, bottom, blockcnt_one, is_arith); |
| 620 | left = right; |
| 621 | } |
| 622 | top = bottom; |
| 623 | } |
| 624 | |
| 625 | if (b->orientation == subband_ll && s->num_refs == 0) |
| 626 | intra_dc_prediction(b); |
| 627 | } |
| 628 | |
| 629 | static int decode_subband_arith(AVCodecContext *avctx, void *b) |
| 630 | { |
| 631 | DiracContext *s = avctx->priv_data; |
| 632 | decode_subband_internal(s, b, 1); |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static int decode_subband_golomb(AVCodecContext *avctx, void *arg) |
| 637 | { |
| 638 | DiracContext *s = avctx->priv_data; |
| 639 | SubBand **b = arg; |
| 640 | decode_subband_internal(s, *b, 0); |
| 641 | return 0; |
| 642 | } |
| 643 | |
| 644 | /** |
| 645 | * Dirac Specification -> |
| 646 | * [DIRAC_STD] 13.4.1 core_transform_data() |
| 647 | */ |
| 648 | static void decode_component(DiracContext *s, int comp) |
| 649 | { |
| 650 | AVCodecContext *avctx = s->avctx; |
| 651 | SubBand *bands[3*MAX_DWT_LEVELS+1]; |
| 652 | enum dirac_subband orientation; |
| 653 | int level, num_bands = 0; |
| 654 | |
| 655 | /* Unpack all subbands at all levels. */ |
| 656 | for (level = 0; level < s->wavelet_depth; level++) { |
| 657 | for (orientation = !!level; orientation < 4; orientation++) { |
| 658 | SubBand *b = &s->plane[comp].band[level][orientation]; |
| 659 | bands[num_bands++] = b; |
| 660 | |
| 661 | align_get_bits(&s->gb); |
| 662 | /* [DIRAC_STD] 13.4.2 subband() */ |
| 663 | b->length = svq3_get_ue_golomb(&s->gb); |
| 664 | if (b->length) { |
| 665 | b->quant = svq3_get_ue_golomb(&s->gb); |
| 666 | align_get_bits(&s->gb); |
| 667 | b->coeff_data = s->gb.buffer + get_bits_count(&s->gb)/8; |
| 668 | b->length = FFMIN(b->length, FFMAX(get_bits_left(&s->gb)/8, 0)); |
| 669 | skip_bits_long(&s->gb, b->length*8); |
| 670 | } |
| 671 | } |
| 672 | /* arithmetic coding has inter-level dependencies, so we can only execute one level at a time */ |
| 673 | if (s->is_arith) |
| 674 | avctx->execute(avctx, decode_subband_arith, &s->plane[comp].band[level][!!level], |
| 675 | NULL, 4-!!level, sizeof(SubBand)); |
| 676 | } |
| 677 | /* golomb coding has no inter-level dependencies, so we can execute all subbands in parallel */ |
| 678 | if (!s->is_arith) |
| 679 | avctx->execute(avctx, decode_subband_golomb, bands, NULL, num_bands, sizeof(SubBand*)); |
| 680 | } |
| 681 | |
| 682 | /* [DIRAC_STD] 13.5.5.2 Luma slice subband data. luma_slice_band(level,orient,sx,sy) --> if b2 == NULL */ |
| 683 | /* [DIRAC_STD] 13.5.5.3 Chroma slice subband data. chroma_slice_band(level,orient,sx,sy) --> if b2 != NULL */ |
| 684 | static void lowdelay_subband(DiracContext *s, GetBitContext *gb, int quant, |
| 685 | int slice_x, int slice_y, int bits_end, |
| 686 | SubBand *b1, SubBand *b2) |
| 687 | { |
| 688 | int left = b1->width * slice_x / s->lowdelay.num_x; |
| 689 | int right = b1->width *(slice_x+1) / s->lowdelay.num_x; |
| 690 | int top = b1->height * slice_y / s->lowdelay.num_y; |
| 691 | int bottom = b1->height *(slice_y+1) / s->lowdelay.num_y; |
| 692 | |
| 693 | int qfactor = qscale_tab[FFMIN(quant, MAX_QUANT)]; |
| 694 | int qoffset = qoffset_intra_tab[FFMIN(quant, MAX_QUANT)]; |
| 695 | |
| 696 | IDWTELEM *buf1 = b1->ibuf + top * b1->stride; |
| 697 | IDWTELEM *buf2 = b2 ? b2->ibuf + top * b2->stride : NULL; |
| 698 | int x, y; |
| 699 | /* we have to constantly check for overread since the spec explicitly |
| 700 | requires this, with the meaning that all remaining coeffs are set to 0 */ |
| 701 | if (get_bits_count(gb) >= bits_end) |
| 702 | return; |
| 703 | |
| 704 | for (y = top; y < bottom; y++) { |
| 705 | for (x = left; x < right; x++) { |
| 706 | buf1[x] = coeff_unpack_golomb(gb, qfactor, qoffset); |
| 707 | if (get_bits_count(gb) >= bits_end) |
| 708 | return; |
| 709 | if (buf2) { |
| 710 | buf2[x] = coeff_unpack_golomb(gb, qfactor, qoffset); |
| 711 | if (get_bits_count(gb) >= bits_end) |
| 712 | return; |
| 713 | } |
| 714 | } |
| 715 | buf1 += b1->stride; |
| 716 | if (buf2) |
| 717 | buf2 += b2->stride; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | struct lowdelay_slice { |
| 722 | GetBitContext gb; |
| 723 | int slice_x; |
| 724 | int slice_y; |
| 725 | int bytes; |
| 726 | }; |
| 727 | |
| 728 | |
| 729 | /** |
| 730 | * Dirac Specification -> |
| 731 | * 13.5.2 Slices. slice(sx,sy) |
| 732 | */ |
| 733 | static int decode_lowdelay_slice(AVCodecContext *avctx, void *arg) |
| 734 | { |
| 735 | DiracContext *s = avctx->priv_data; |
| 736 | struct lowdelay_slice *slice = arg; |
| 737 | GetBitContext *gb = &slice->gb; |
| 738 | enum dirac_subband orientation; |
| 739 | int level, quant, chroma_bits, chroma_end; |
| 740 | |
| 741 | int quant_base = get_bits(gb, 7); /*[DIRAC_STD] qindex */ |
| 742 | int length_bits = av_log2(8 * slice->bytes)+1; |
| 743 | int luma_bits = get_bits_long(gb, length_bits); |
| 744 | int luma_end = get_bits_count(gb) + FFMIN(luma_bits, get_bits_left(gb)); |
| 745 | |
| 746 | /* [DIRAC_STD] 13.5.5.2 luma_slice_band */ |
| 747 | for (level = 0; level < s->wavelet_depth; level++) |
| 748 | for (orientation = !!level; orientation < 4; orientation++) { |
| 749 | quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); |
| 750 | lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, luma_end, |
| 751 | &s->plane[0].band[level][orientation], NULL); |
| 752 | } |
| 753 | |
| 754 | /* consume any unused bits from luma */ |
| 755 | skip_bits_long(gb, get_bits_count(gb) - luma_end); |
| 756 | |
| 757 | chroma_bits = 8*slice->bytes - 7 - length_bits - luma_bits; |
| 758 | chroma_end = get_bits_count(gb) + FFMIN(chroma_bits, get_bits_left(gb)); |
| 759 | /* [DIRAC_STD] 13.5.5.3 chroma_slice_band */ |
| 760 | for (level = 0; level < s->wavelet_depth; level++) |
| 761 | for (orientation = !!level; orientation < 4; orientation++) { |
| 762 | quant = FFMAX(quant_base - s->lowdelay.quant[level][orientation], 0); |
| 763 | lowdelay_subband(s, gb, quant, slice->slice_x, slice->slice_y, chroma_end, |
| 764 | &s->plane[1].band[level][orientation], |
| 765 | &s->plane[2].band[level][orientation]); |
| 766 | } |
| 767 | |
| 768 | return 0; |
| 769 | } |
| 770 | |
| 771 | /** |
| 772 | * Dirac Specification -> |
| 773 | * 13.5.1 low_delay_transform_data() |
| 774 | */ |
| 775 | static void decode_lowdelay(DiracContext *s) |
| 776 | { |
| 777 | AVCodecContext *avctx = s->avctx; |
| 778 | int slice_x, slice_y, bytes, bufsize; |
| 779 | const uint8_t *buf; |
| 780 | struct lowdelay_slice *slices; |
| 781 | int slice_num = 0; |
| 782 | |
| 783 | slices = av_mallocz_array(s->lowdelay.num_x, s->lowdelay.num_y * sizeof(struct lowdelay_slice)); |
| 784 | |
| 785 | align_get_bits(&s->gb); |
| 786 | /*[DIRAC_STD] 13.5.2 Slices. slice(sx,sy) */ |
| 787 | buf = s->gb.buffer + get_bits_count(&s->gb)/8; |
| 788 | bufsize = get_bits_left(&s->gb); |
| 789 | |
| 790 | for (slice_y = 0; bufsize > 0 && slice_y < s->lowdelay.num_y; slice_y++) |
| 791 | for (slice_x = 0; bufsize > 0 && slice_x < s->lowdelay.num_x; slice_x++) { |
| 792 | bytes = (slice_num+1) * s->lowdelay.bytes.num / s->lowdelay.bytes.den |
| 793 | - slice_num * s->lowdelay.bytes.num / s->lowdelay.bytes.den; |
| 794 | |
| 795 | slices[slice_num].bytes = bytes; |
| 796 | slices[slice_num].slice_x = slice_x; |
| 797 | slices[slice_num].slice_y = slice_y; |
| 798 | init_get_bits(&slices[slice_num].gb, buf, bufsize); |
| 799 | slice_num++; |
| 800 | |
| 801 | buf += bytes; |
| 802 | bufsize -= bytes*8; |
| 803 | } |
| 804 | |
| 805 | avctx->execute(avctx, decode_lowdelay_slice, slices, NULL, slice_num, |
| 806 | sizeof(struct lowdelay_slice)); /* [DIRAC_STD] 13.5.2 Slices */ |
| 807 | intra_dc_prediction(&s->plane[0].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ |
| 808 | intra_dc_prediction(&s->plane[1].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ |
| 809 | intra_dc_prediction(&s->plane[2].band[0][0]); /* [DIRAC_STD] 13.3 intra_dc_prediction() */ |
| 810 | av_free(slices); |
| 811 | } |
| 812 | |
| 813 | static void init_planes(DiracContext *s) |
| 814 | { |
| 815 | int i, w, h, level, orientation; |
| 816 | |
| 817 | for (i = 0; i < 3; i++) { |
| 818 | Plane *p = &s->plane[i]; |
| 819 | |
| 820 | p->width = s->source.width >> (i ? s->chroma_x_shift : 0); |
| 821 | p->height = s->source.height >> (i ? s->chroma_y_shift : 0); |
| 822 | p->idwt_width = w = CALC_PADDING(p->width , s->wavelet_depth); |
| 823 | p->idwt_height = h = CALC_PADDING(p->height, s->wavelet_depth); |
| 824 | p->idwt_stride = FFALIGN(p->idwt_width, 8); |
| 825 | |
| 826 | for (level = s->wavelet_depth-1; level >= 0; level--) { |
| 827 | w = w>>1; |
| 828 | h = h>>1; |
| 829 | for (orientation = !!level; orientation < 4; orientation++) { |
| 830 | SubBand *b = &p->band[level][orientation]; |
| 831 | |
| 832 | b->ibuf = p->idwt_buf; |
| 833 | b->level = level; |
| 834 | b->stride = p->idwt_stride << (s->wavelet_depth - level); |
| 835 | b->width = w; |
| 836 | b->height = h; |
| 837 | b->orientation = orientation; |
| 838 | |
| 839 | if (orientation & 1) |
| 840 | b->ibuf += w; |
| 841 | if (orientation > 1) |
| 842 | b->ibuf += b->stride>>1; |
| 843 | |
| 844 | if (level) |
| 845 | b->parent = &p->band[level-1][orientation]; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | if (i > 0) { |
| 850 | p->xblen = s->plane[0].xblen >> s->chroma_x_shift; |
| 851 | p->yblen = s->plane[0].yblen >> s->chroma_y_shift; |
| 852 | p->xbsep = s->plane[0].xbsep >> s->chroma_x_shift; |
| 853 | p->ybsep = s->plane[0].ybsep >> s->chroma_y_shift; |
| 854 | } |
| 855 | |
| 856 | p->xoffset = (p->xblen - p->xbsep)/2; |
| 857 | p->yoffset = (p->yblen - p->ybsep)/2; |
| 858 | } |
| 859 | } |
| 860 | |
| 861 | /** |
| 862 | * Unpack the motion compensation parameters |
| 863 | * Dirac Specification -> |
| 864 | * 11.2 Picture prediction data. picture_prediction() |
| 865 | */ |
| 866 | static int dirac_unpack_prediction_parameters(DiracContext *s) |
| 867 | { |
| 868 | static const uint8_t default_blen[] = { 4, 12, 16, 24 }; |
| 869 | static const uint8_t default_bsep[] = { 4, 8, 12, 16 }; |
| 870 | |
| 871 | GetBitContext *gb = &s->gb; |
| 872 | unsigned idx, ref; |
| 873 | |
| 874 | align_get_bits(gb); |
| 875 | /* [DIRAC_STD] 11.2.2 Block parameters. block_parameters() */ |
| 876 | /* Luma and Chroma are equal. 11.2.3 */ |
| 877 | idx = svq3_get_ue_golomb(gb); /* [DIRAC_STD] index */ |
| 878 | |
| 879 | if (idx > 4) { |
| 880 | av_log(s->avctx, AV_LOG_ERROR, "Block prediction index too high\n"); |
| 881 | return -1; |
| 882 | } |
| 883 | |
| 884 | if (idx == 0) { |
| 885 | s->plane[0].xblen = svq3_get_ue_golomb(gb); |
| 886 | s->plane[0].yblen = svq3_get_ue_golomb(gb); |
| 887 | s->plane[0].xbsep = svq3_get_ue_golomb(gb); |
| 888 | s->plane[0].ybsep = svq3_get_ue_golomb(gb); |
| 889 | } else { |
| 890 | /*[DIRAC_STD] preset_block_params(index). Table 11.1 */ |
| 891 | s->plane[0].xblen = default_blen[idx-1]; |
| 892 | s->plane[0].yblen = default_blen[idx-1]; |
| 893 | s->plane[0].xbsep = default_bsep[idx-1]; |
| 894 | s->plane[0].ybsep = default_bsep[idx-1]; |
| 895 | } |
| 896 | /*[DIRAC_STD] 11.2.4 motion_data_dimensions() |
| 897 | Calculated in function dirac_unpack_block_motion_data */ |
| 898 | |
| 899 | if (!s->plane[0].xbsep || !s->plane[0].ybsep || s->plane[0].xbsep < s->plane[0].xblen/2 || s->plane[0].ybsep < s->plane[0].yblen/2) { |
| 900 | av_log(s->avctx, AV_LOG_ERROR, "Block separation too small\n"); |
| 901 | return -1; |
| 902 | } |
| 903 | if (s->plane[0].xbsep > s->plane[0].xblen || s->plane[0].ybsep > s->plane[0].yblen) { |
| 904 | av_log(s->avctx, AV_LOG_ERROR, "Block separation greater than size\n"); |
| 905 | return -1; |
| 906 | } |
| 907 | if (FFMAX(s->plane[0].xblen, s->plane[0].yblen) > MAX_BLOCKSIZE) { |
| 908 | av_log(s->avctx, AV_LOG_ERROR, "Unsupported large block size\n"); |
| 909 | return -1; |
| 910 | } |
| 911 | |
| 912 | /*[DIRAC_STD] 11.2.5 Motion vector precision. motion_vector_precision() |
| 913 | Read motion vector precision */ |
| 914 | s->mv_precision = svq3_get_ue_golomb(gb); |
| 915 | if (s->mv_precision > 3) { |
| 916 | av_log(s->avctx, AV_LOG_ERROR, "MV precision finer than eighth-pel\n"); |
| 917 | return -1; |
| 918 | } |
| 919 | |
| 920 | /*[DIRAC_STD] 11.2.6 Global motion. global_motion() |
| 921 | Read the global motion compensation parameters */ |
| 922 | s->globalmc_flag = get_bits1(gb); |
| 923 | if (s->globalmc_flag) { |
| 924 | memset(s->globalmc, 0, sizeof(s->globalmc)); |
| 925 | /* [DIRAC_STD] pan_tilt(gparams) */ |
| 926 | for (ref = 0; ref < s->num_refs; ref++) { |
| 927 | if (get_bits1(gb)) { |
| 928 | s->globalmc[ref].pan_tilt[0] = dirac_get_se_golomb(gb); |
| 929 | s->globalmc[ref].pan_tilt[1] = dirac_get_se_golomb(gb); |
| 930 | } |
| 931 | /* [DIRAC_STD] zoom_rotate_shear(gparams) |
| 932 | zoom/rotation/shear parameters */ |
| 933 | if (get_bits1(gb)) { |
| 934 | s->globalmc[ref].zrs_exp = svq3_get_ue_golomb(gb); |
| 935 | s->globalmc[ref].zrs[0][0] = dirac_get_se_golomb(gb); |
| 936 | s->globalmc[ref].zrs[0][1] = dirac_get_se_golomb(gb); |
| 937 | s->globalmc[ref].zrs[1][0] = dirac_get_se_golomb(gb); |
| 938 | s->globalmc[ref].zrs[1][1] = dirac_get_se_golomb(gb); |
| 939 | } else { |
| 940 | s->globalmc[ref].zrs[0][0] = 1; |
| 941 | s->globalmc[ref].zrs[1][1] = 1; |
| 942 | } |
| 943 | /* [DIRAC_STD] perspective(gparams) */ |
| 944 | if (get_bits1(gb)) { |
| 945 | s->globalmc[ref].perspective_exp = svq3_get_ue_golomb(gb); |
| 946 | s->globalmc[ref].perspective[0] = dirac_get_se_golomb(gb); |
| 947 | s->globalmc[ref].perspective[1] = dirac_get_se_golomb(gb); |
| 948 | } |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | /*[DIRAC_STD] 11.2.7 Picture prediction mode. prediction_mode() |
| 953 | Picture prediction mode, not currently used. */ |
| 954 | if (svq3_get_ue_golomb(gb)) { |
| 955 | av_log(s->avctx, AV_LOG_ERROR, "Unknown picture prediction mode\n"); |
| 956 | return -1; |
| 957 | } |
| 958 | |
| 959 | /* [DIRAC_STD] 11.2.8 Reference picture weight. reference_picture_weights() |
| 960 | just data read, weight calculation will be done later on. */ |
| 961 | s->weight_log2denom = 1; |
| 962 | s->weight[0] = 1; |
| 963 | s->weight[1] = 1; |
| 964 | |
| 965 | if (get_bits1(gb)) { |
| 966 | s->weight_log2denom = svq3_get_ue_golomb(gb); |
| 967 | s->weight[0] = dirac_get_se_golomb(gb); |
| 968 | if (s->num_refs == 2) |
| 969 | s->weight[1] = dirac_get_se_golomb(gb); |
| 970 | } |
| 971 | return 0; |
| 972 | } |
| 973 | |
| 974 | /** |
| 975 | * Dirac Specification -> |
| 976 | * 11.3 Wavelet transform data. wavelet_transform() |
| 977 | */ |
| 978 | static int dirac_unpack_idwt_params(DiracContext *s) |
| 979 | { |
| 980 | GetBitContext *gb = &s->gb; |
| 981 | int i, level; |
| 982 | unsigned tmp; |
| 983 | |
| 984 | #define CHECKEDREAD(dst, cond, errmsg) \ |
| 985 | tmp = svq3_get_ue_golomb(gb); \ |
| 986 | if (cond) { \ |
| 987 | av_log(s->avctx, AV_LOG_ERROR, errmsg); \ |
| 988 | return -1; \ |
| 989 | }\ |
| 990 | dst = tmp; |
| 991 | |
| 992 | align_get_bits(gb); |
| 993 | |
| 994 | s->zero_res = s->num_refs ? get_bits1(gb) : 0; |
| 995 | if (s->zero_res) |
| 996 | return 0; |
| 997 | |
| 998 | /*[DIRAC_STD] 11.3.1 Transform parameters. transform_parameters() */ |
| 999 | CHECKEDREAD(s->wavelet_idx, tmp > 6, "wavelet_idx is too big\n") |
| 1000 | |
| 1001 | CHECKEDREAD(s->wavelet_depth, tmp > MAX_DWT_LEVELS || tmp < 1, "invalid number of DWT decompositions\n") |
| 1002 | |
| 1003 | if (!s->low_delay) { |
| 1004 | /* Codeblock parameters (core syntax only) */ |
| 1005 | if (get_bits1(gb)) { |
| 1006 | for (i = 0; i <= s->wavelet_depth; i++) { |
| 1007 | CHECKEDREAD(s->codeblock[i].width , tmp < 1 || tmp > (s->avctx->width >>s->wavelet_depth-i), "codeblock width invalid\n") |
| 1008 | CHECKEDREAD(s->codeblock[i].height, tmp < 1 || tmp > (s->avctx->height>>s->wavelet_depth-i), "codeblock height invalid\n") |
| 1009 | } |
| 1010 | |
| 1011 | CHECKEDREAD(s->codeblock_mode, tmp > 1, "unknown codeblock mode\n") |
| 1012 | } else |
| 1013 | for (i = 0; i <= s->wavelet_depth; i++) |
| 1014 | s->codeblock[i].width = s->codeblock[i].height = 1; |
| 1015 | } else { |
| 1016 | /* Slice parameters + quantization matrix*/ |
| 1017 | /*[DIRAC_STD] 11.3.4 Slice coding Parameters (low delay syntax only). slice_parameters() */ |
| 1018 | s->lowdelay.num_x = svq3_get_ue_golomb(gb); |
| 1019 | s->lowdelay.num_y = svq3_get_ue_golomb(gb); |
| 1020 | s->lowdelay.bytes.num = svq3_get_ue_golomb(gb); |
| 1021 | s->lowdelay.bytes.den = svq3_get_ue_golomb(gb); |
| 1022 | |
| 1023 | if (s->lowdelay.bytes.den <= 0) { |
| 1024 | av_log(s->avctx,AV_LOG_ERROR,"Invalid lowdelay.bytes.den\n"); |
| 1025 | return AVERROR_INVALIDDATA; |
| 1026 | } |
| 1027 | |
| 1028 | /* [DIRAC_STD] 11.3.5 Quantisation matrices (low-delay syntax). quant_matrix() */ |
| 1029 | if (get_bits1(gb)) { |
| 1030 | av_log(s->avctx,AV_LOG_DEBUG,"Low Delay: Has Custom Quantization Matrix!\n"); |
| 1031 | /* custom quantization matrix */ |
| 1032 | s->lowdelay.quant[0][0] = svq3_get_ue_golomb(gb); |
| 1033 | for (level = 0; level < s->wavelet_depth; level++) { |
| 1034 | s->lowdelay.quant[level][1] = svq3_get_ue_golomb(gb); |
| 1035 | s->lowdelay.quant[level][2] = svq3_get_ue_golomb(gb); |
| 1036 | s->lowdelay.quant[level][3] = svq3_get_ue_golomb(gb); |
| 1037 | } |
| 1038 | } else { |
| 1039 | if (s->wavelet_depth > 4) { |
| 1040 | av_log(s->avctx,AV_LOG_ERROR,"Mandatory custom low delay matrix missing for depth %d\n", s->wavelet_depth); |
| 1041 | return AVERROR_INVALIDDATA; |
| 1042 | } |
| 1043 | /* default quantization matrix */ |
| 1044 | for (level = 0; level < s->wavelet_depth; level++) |
| 1045 | for (i = 0; i < 4; i++) { |
| 1046 | s->lowdelay.quant[level][i] = default_qmat[s->wavelet_idx][level][i]; |
| 1047 | /* haar with no shift differs for different depths */ |
| 1048 | if (s->wavelet_idx == 3) |
| 1049 | s->lowdelay.quant[level][i] += 4*(s->wavelet_depth-1 - level); |
| 1050 | } |
| 1051 | } |
| 1052 | } |
| 1053 | return 0; |
| 1054 | } |
| 1055 | |
| 1056 | static inline int pred_sbsplit(uint8_t *sbsplit, int stride, int x, int y) |
| 1057 | { |
| 1058 | static const uint8_t avgsplit[7] = { 0, 0, 1, 1, 1, 2, 2 }; |
| 1059 | |
| 1060 | if (!(x|y)) |
| 1061 | return 0; |
| 1062 | else if (!y) |
| 1063 | return sbsplit[-1]; |
| 1064 | else if (!x) |
| 1065 | return sbsplit[-stride]; |
| 1066 | |
| 1067 | return avgsplit[sbsplit[-1] + sbsplit[-stride] + sbsplit[-stride-1]]; |
| 1068 | } |
| 1069 | |
| 1070 | static inline int pred_block_mode(DiracBlock *block, int stride, int x, int y, int refmask) |
| 1071 | { |
| 1072 | int pred; |
| 1073 | |
| 1074 | if (!(x|y)) |
| 1075 | return 0; |
| 1076 | else if (!y) |
| 1077 | return block[-1].ref & refmask; |
| 1078 | else if (!x) |
| 1079 | return block[-stride].ref & refmask; |
| 1080 | |
| 1081 | /* return the majority */ |
| 1082 | pred = (block[-1].ref & refmask) + (block[-stride].ref & refmask) + (block[-stride-1].ref & refmask); |
| 1083 | return (pred >> 1) & refmask; |
| 1084 | } |
| 1085 | |
| 1086 | static inline void pred_block_dc(DiracBlock *block, int stride, int x, int y) |
| 1087 | { |
| 1088 | int i, n = 0; |
| 1089 | |
| 1090 | memset(block->u.dc, 0, sizeof(block->u.dc)); |
| 1091 | |
| 1092 | if (x && !(block[-1].ref & 3)) { |
| 1093 | for (i = 0; i < 3; i++) |
| 1094 | block->u.dc[i] += block[-1].u.dc[i]; |
| 1095 | n++; |
| 1096 | } |
| 1097 | |
| 1098 | if (y && !(block[-stride].ref & 3)) { |
| 1099 | for (i = 0; i < 3; i++) |
| 1100 | block->u.dc[i] += block[-stride].u.dc[i]; |
| 1101 | n++; |
| 1102 | } |
| 1103 | |
| 1104 | if (x && y && !(block[-1-stride].ref & 3)) { |
| 1105 | for (i = 0; i < 3; i++) |
| 1106 | block->u.dc[i] += block[-1-stride].u.dc[i]; |
| 1107 | n++; |
| 1108 | } |
| 1109 | |
| 1110 | if (n == 2) { |
| 1111 | for (i = 0; i < 3; i++) |
| 1112 | block->u.dc[i] = (block->u.dc[i]+1)>>1; |
| 1113 | } else if (n == 3) { |
| 1114 | for (i = 0; i < 3; i++) |
| 1115 | block->u.dc[i] = divide3(block->u.dc[i]); |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | static inline void pred_mv(DiracBlock *block, int stride, int x, int y, int ref) |
| 1120 | { |
| 1121 | int16_t *pred[3]; |
| 1122 | int refmask = ref+1; |
| 1123 | int mask = refmask | DIRAC_REF_MASK_GLOBAL; /* exclude gmc blocks */ |
| 1124 | int n = 0; |
| 1125 | |
| 1126 | if (x && (block[-1].ref & mask) == refmask) |
| 1127 | pred[n++] = block[-1].u.mv[ref]; |
| 1128 | |
| 1129 | if (y && (block[-stride].ref & mask) == refmask) |
| 1130 | pred[n++] = block[-stride].u.mv[ref]; |
| 1131 | |
| 1132 | if (x && y && (block[-stride-1].ref & mask) == refmask) |
| 1133 | pred[n++] = block[-stride-1].u.mv[ref]; |
| 1134 | |
| 1135 | switch (n) { |
| 1136 | case 0: |
| 1137 | block->u.mv[ref][0] = 0; |
| 1138 | block->u.mv[ref][1] = 0; |
| 1139 | break; |
| 1140 | case 1: |
| 1141 | block->u.mv[ref][0] = pred[0][0]; |
| 1142 | block->u.mv[ref][1] = pred[0][1]; |
| 1143 | break; |
| 1144 | case 2: |
| 1145 | block->u.mv[ref][0] = (pred[0][0] + pred[1][0] + 1) >> 1; |
| 1146 | block->u.mv[ref][1] = (pred[0][1] + pred[1][1] + 1) >> 1; |
| 1147 | break; |
| 1148 | case 3: |
| 1149 | block->u.mv[ref][0] = mid_pred(pred[0][0], pred[1][0], pred[2][0]); |
| 1150 | block->u.mv[ref][1] = mid_pred(pred[0][1], pred[1][1], pred[2][1]); |
| 1151 | break; |
| 1152 | } |
| 1153 | } |
| 1154 | |
| 1155 | static void global_mv(DiracContext *s, DiracBlock *block, int x, int y, int ref) |
| 1156 | { |
| 1157 | int ez = s->globalmc[ref].zrs_exp; |
| 1158 | int ep = s->globalmc[ref].perspective_exp; |
| 1159 | int (*A)[2] = s->globalmc[ref].zrs; |
| 1160 | int *b = s->globalmc[ref].pan_tilt; |
| 1161 | int *c = s->globalmc[ref].perspective; |
| 1162 | |
| 1163 | int m = (1<<ep) - (c[0]*x + c[1]*y); |
| 1164 | int mx = m * ((A[0][0] * x + A[0][1]*y) + (1<<ez) * b[0]); |
| 1165 | int my = m * ((A[1][0] * x + A[1][1]*y) + (1<<ez) * b[1]); |
| 1166 | |
| 1167 | block->u.mv[ref][0] = (mx + (1<<(ez+ep))) >> (ez+ep); |
| 1168 | block->u.mv[ref][1] = (my + (1<<(ez+ep))) >> (ez+ep); |
| 1169 | } |
| 1170 | |
| 1171 | static void decode_block_params(DiracContext *s, DiracArith arith[8], DiracBlock *block, |
| 1172 | int stride, int x, int y) |
| 1173 | { |
| 1174 | int i; |
| 1175 | |
| 1176 | block->ref = pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF1); |
| 1177 | block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF1); |
| 1178 | |
| 1179 | if (s->num_refs == 2) { |
| 1180 | block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_REF2); |
| 1181 | block->ref ^= dirac_get_arith_bit(arith, CTX_PMODE_REF2) << 1; |
| 1182 | } |
| 1183 | |
| 1184 | if (!block->ref) { |
| 1185 | pred_block_dc(block, stride, x, y); |
| 1186 | for (i = 0; i < 3; i++) |
| 1187 | block->u.dc[i] += dirac_get_arith_int(arith+1+i, CTX_DC_F1, CTX_DC_DATA); |
| 1188 | return; |
| 1189 | } |
| 1190 | |
| 1191 | if (s->globalmc_flag) { |
| 1192 | block->ref |= pred_block_mode(block, stride, x, y, DIRAC_REF_MASK_GLOBAL); |
| 1193 | block->ref ^= dirac_get_arith_bit(arith, CTX_GLOBAL_BLOCK) << 2; |
| 1194 | } |
| 1195 | |
| 1196 | for (i = 0; i < s->num_refs; i++) |
| 1197 | if (block->ref & (i+1)) { |
| 1198 | if (block->ref & DIRAC_REF_MASK_GLOBAL) { |
| 1199 | global_mv(s, block, x, y, i); |
| 1200 | } else { |
| 1201 | pred_mv(block, stride, x, y, i); |
| 1202 | block->u.mv[i][0] += dirac_get_arith_int(arith + 4 + 2 * i, CTX_MV_F1, CTX_MV_DATA); |
| 1203 | block->u.mv[i][1] += dirac_get_arith_int(arith + 5 + 2 * i, CTX_MV_F1, CTX_MV_DATA); |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | /** |
| 1209 | * Copies the current block to the other blocks covered by the current superblock split mode |
| 1210 | */ |
| 1211 | static void propagate_block_data(DiracBlock *block, int stride, int size) |
| 1212 | { |
| 1213 | int x, y; |
| 1214 | DiracBlock *dst = block; |
| 1215 | |
| 1216 | for (x = 1; x < size; x++) |
| 1217 | dst[x] = *block; |
| 1218 | |
| 1219 | for (y = 1; y < size; y++) { |
| 1220 | dst += stride; |
| 1221 | for (x = 0; x < size; x++) |
| 1222 | dst[x] = *block; |
| 1223 | } |
| 1224 | } |
| 1225 | |
| 1226 | /** |
| 1227 | * Dirac Specification -> |
| 1228 | * 12. Block motion data syntax |
| 1229 | */ |
| 1230 | static int dirac_unpack_block_motion_data(DiracContext *s) |
| 1231 | { |
| 1232 | GetBitContext *gb = &s->gb; |
| 1233 | uint8_t *sbsplit = s->sbsplit; |
| 1234 | int i, x, y, q, p; |
| 1235 | DiracArith arith[8]; |
| 1236 | |
| 1237 | align_get_bits(gb); |
| 1238 | |
| 1239 | /* [DIRAC_STD] 11.2.4 and 12.2.1 Number of blocks and superblocks */ |
| 1240 | s->sbwidth = DIVRNDUP(s->source.width, 4*s->plane[0].xbsep); |
| 1241 | s->sbheight = DIVRNDUP(s->source.height, 4*s->plane[0].ybsep); |
| 1242 | s->blwidth = 4 * s->sbwidth; |
| 1243 | s->blheight = 4 * s->sbheight; |
| 1244 | |
| 1245 | /* [DIRAC_STD] 12.3.1 Superblock splitting modes. superblock_split_modes() |
| 1246 | decode superblock split modes */ |
| 1247 | ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); /* svq3_get_ue_golomb(gb) is the length */ |
| 1248 | for (y = 0; y < s->sbheight; y++) { |
| 1249 | for (x = 0; x < s->sbwidth; x++) { |
| 1250 | unsigned int split = dirac_get_arith_uint(arith, CTX_SB_F1, CTX_SB_DATA); |
| 1251 | if (split > 2) |
| 1252 | return -1; |
| 1253 | sbsplit[x] = (split + pred_sbsplit(sbsplit+x, s->sbwidth, x, y)) % 3; |
| 1254 | } |
| 1255 | sbsplit += s->sbwidth; |
| 1256 | } |
| 1257 | |
| 1258 | /* setup arith decoding */ |
| 1259 | ff_dirac_init_arith_decoder(arith, gb, svq3_get_ue_golomb(gb)); |
| 1260 | for (i = 0; i < s->num_refs; i++) { |
| 1261 | ff_dirac_init_arith_decoder(arith + 4 + 2 * i, gb, svq3_get_ue_golomb(gb)); |
| 1262 | ff_dirac_init_arith_decoder(arith + 5 + 2 * i, gb, svq3_get_ue_golomb(gb)); |
| 1263 | } |
| 1264 | for (i = 0; i < 3; i++) |
| 1265 | ff_dirac_init_arith_decoder(arith+1+i, gb, svq3_get_ue_golomb(gb)); |
| 1266 | |
| 1267 | for (y = 0; y < s->sbheight; y++) |
| 1268 | for (x = 0; x < s->sbwidth; x++) { |
| 1269 | int blkcnt = 1 << s->sbsplit[y * s->sbwidth + x]; |
| 1270 | int step = 4 >> s->sbsplit[y * s->sbwidth + x]; |
| 1271 | |
| 1272 | for (q = 0; q < blkcnt; q++) |
| 1273 | for (p = 0; p < blkcnt; p++) { |
| 1274 | int bx = 4 * x + p*step; |
| 1275 | int by = 4 * y + q*step; |
| 1276 | DiracBlock *block = &s->blmotion[by*s->blwidth + bx]; |
| 1277 | decode_block_params(s, arith, block, s->blwidth, bx, by); |
| 1278 | propagate_block_data(block, s->blwidth, step); |
| 1279 | } |
| 1280 | } |
| 1281 | |
| 1282 | return 0; |
| 1283 | } |
| 1284 | |
| 1285 | static int weight(int i, int blen, int offset) |
| 1286 | { |
| 1287 | #define ROLLOFF(i) offset == 1 ? ((i) ? 5 : 3) : \ |
| 1288 | (1 + (6*(i) + offset - 1) / (2*offset - 1)) |
| 1289 | |
| 1290 | if (i < 2*offset) |
| 1291 | return ROLLOFF(i); |
| 1292 | else if (i > blen-1 - 2*offset) |
| 1293 | return ROLLOFF(blen-1 - i); |
| 1294 | return 8; |
| 1295 | } |
| 1296 | |
| 1297 | static void init_obmc_weight_row(Plane *p, uint8_t *obmc_weight, int stride, |
| 1298 | int left, int right, int wy) |
| 1299 | { |
| 1300 | int x; |
| 1301 | for (x = 0; left && x < p->xblen >> 1; x++) |
| 1302 | obmc_weight[x] = wy*8; |
| 1303 | for (; x < p->xblen >> right; x++) |
| 1304 | obmc_weight[x] = wy*weight(x, p->xblen, p->xoffset); |
| 1305 | for (; x < p->xblen; x++) |
| 1306 | obmc_weight[x] = wy*8; |
| 1307 | for (; x < stride; x++) |
| 1308 | obmc_weight[x] = 0; |
| 1309 | } |
| 1310 | |
| 1311 | static void init_obmc_weight(Plane *p, uint8_t *obmc_weight, int stride, |
| 1312 | int left, int right, int top, int bottom) |
| 1313 | { |
| 1314 | int y; |
| 1315 | for (y = 0; top && y < p->yblen >> 1; y++) { |
| 1316 | init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); |
| 1317 | obmc_weight += stride; |
| 1318 | } |
| 1319 | for (; y < p->yblen >> bottom; y++) { |
| 1320 | int wy = weight(y, p->yblen, p->yoffset); |
| 1321 | init_obmc_weight_row(p, obmc_weight, stride, left, right, wy); |
| 1322 | obmc_weight += stride; |
| 1323 | } |
| 1324 | for (; y < p->yblen; y++) { |
| 1325 | init_obmc_weight_row(p, obmc_weight, stride, left, right, 8); |
| 1326 | obmc_weight += stride; |
| 1327 | } |
| 1328 | } |
| 1329 | |
| 1330 | static void init_obmc_weights(DiracContext *s, Plane *p, int by) |
| 1331 | { |
| 1332 | int top = !by; |
| 1333 | int bottom = by == s->blheight-1; |
| 1334 | |
| 1335 | /* don't bother re-initing for rows 2 to blheight-2, the weights don't change */ |
| 1336 | if (top || bottom || by == 1) { |
| 1337 | init_obmc_weight(p, s->obmc_weight[0], MAX_BLOCKSIZE, 1, 0, top, bottom); |
| 1338 | init_obmc_weight(p, s->obmc_weight[1], MAX_BLOCKSIZE, 0, 0, top, bottom); |
| 1339 | init_obmc_weight(p, s->obmc_weight[2], MAX_BLOCKSIZE, 0, 1, top, bottom); |
| 1340 | } |
| 1341 | } |
| 1342 | |
| 1343 | static const uint8_t epel_weights[4][4][4] = { |
| 1344 | {{ 16, 0, 0, 0 }, |
| 1345 | { 12, 4, 0, 0 }, |
| 1346 | { 8, 8, 0, 0 }, |
| 1347 | { 4, 12, 0, 0 }}, |
| 1348 | {{ 12, 0, 4, 0 }, |
| 1349 | { 9, 3, 3, 1 }, |
| 1350 | { 6, 6, 2, 2 }, |
| 1351 | { 3, 9, 1, 3 }}, |
| 1352 | {{ 8, 0, 8, 0 }, |
| 1353 | { 6, 2, 6, 2 }, |
| 1354 | { 4, 4, 4, 4 }, |
| 1355 | { 2, 6, 2, 6 }}, |
| 1356 | {{ 4, 0, 12, 0 }, |
| 1357 | { 3, 1, 9, 3 }, |
| 1358 | { 2, 2, 6, 6 }, |
| 1359 | { 1, 3, 3, 9 }} |
| 1360 | }; |
| 1361 | |
| 1362 | /** |
| 1363 | * For block x,y, determine which of the hpel planes to do bilinear |
| 1364 | * interpolation from and set src[] to the location in each hpel plane |
| 1365 | * to MC from. |
| 1366 | * |
| 1367 | * @return the index of the put_dirac_pixels_tab function to use |
| 1368 | * 0 for 1 plane (fpel,hpel), 1 for 2 planes (qpel), 2 for 4 planes (qpel), and 3 for epel |
| 1369 | */ |
| 1370 | static int mc_subpel(DiracContext *s, DiracBlock *block, const uint8_t *src[5], |
| 1371 | int x, int y, int ref, int plane) |
| 1372 | { |
| 1373 | Plane *p = &s->plane[plane]; |
| 1374 | uint8_t **ref_hpel = s->ref_pics[ref]->hpel[plane]; |
| 1375 | int motion_x = block->u.mv[ref][0]; |
| 1376 | int motion_y = block->u.mv[ref][1]; |
| 1377 | int mx, my, i, epel, nplanes = 0; |
| 1378 | |
| 1379 | if (plane) { |
| 1380 | motion_x >>= s->chroma_x_shift; |
| 1381 | motion_y >>= s->chroma_y_shift; |
| 1382 | } |
| 1383 | |
| 1384 | mx = motion_x & ~(-1U << s->mv_precision); |
| 1385 | my = motion_y & ~(-1U << s->mv_precision); |
| 1386 | motion_x >>= s->mv_precision; |
| 1387 | motion_y >>= s->mv_precision; |
| 1388 | /* normalize subpel coordinates to epel */ |
| 1389 | /* TODO: template this function? */ |
| 1390 | mx <<= 3 - s->mv_precision; |
| 1391 | my <<= 3 - s->mv_precision; |
| 1392 | |
| 1393 | x += motion_x; |
| 1394 | y += motion_y; |
| 1395 | epel = (mx|my)&1; |
| 1396 | |
| 1397 | /* hpel position */ |
| 1398 | if (!((mx|my)&3)) { |
| 1399 | nplanes = 1; |
| 1400 | src[0] = ref_hpel[(my>>1)+(mx>>2)] + y*p->stride + x; |
| 1401 | } else { |
| 1402 | /* qpel or epel */ |
| 1403 | nplanes = 4; |
| 1404 | for (i = 0; i < 4; i++) |
| 1405 | src[i] = ref_hpel[i] + y*p->stride + x; |
| 1406 | |
| 1407 | /* if we're interpolating in the right/bottom halves, adjust the planes as needed |
| 1408 | we increment x/y because the edge changes for half of the pixels */ |
| 1409 | if (mx > 4) { |
| 1410 | src[0] += 1; |
| 1411 | src[2] += 1; |
| 1412 | x++; |
| 1413 | } |
| 1414 | if (my > 4) { |
| 1415 | src[0] += p->stride; |
| 1416 | src[1] += p->stride; |
| 1417 | y++; |
| 1418 | } |
| 1419 | |
| 1420 | /* hpel planes are: |
| 1421 | [0]: F [1]: H |
| 1422 | [2]: V [3]: C */ |
| 1423 | if (!epel) { |
| 1424 | /* check if we really only need 2 planes since either mx or my is |
| 1425 | a hpel position. (epel weights of 0 handle this there) */ |
| 1426 | if (!(mx&3)) { |
| 1427 | /* mx == 0: average [0] and [2] |
| 1428 | mx == 4: average [1] and [3] */ |
| 1429 | src[!mx] = src[2 + !!mx]; |
| 1430 | nplanes = 2; |
| 1431 | } else if (!(my&3)) { |
| 1432 | src[0] = src[(my>>1) ]; |
| 1433 | src[1] = src[(my>>1)+1]; |
| 1434 | nplanes = 2; |
| 1435 | } |
| 1436 | } else { |
| 1437 | /* adjust the ordering if needed so the weights work */ |
| 1438 | if (mx > 4) { |
| 1439 | FFSWAP(const uint8_t *, src[0], src[1]); |
| 1440 | FFSWAP(const uint8_t *, src[2], src[3]); |
| 1441 | } |
| 1442 | if (my > 4) { |
| 1443 | FFSWAP(const uint8_t *, src[0], src[2]); |
| 1444 | FFSWAP(const uint8_t *, src[1], src[3]); |
| 1445 | } |
| 1446 | src[4] = epel_weights[my&3][mx&3]; |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | /* fixme: v/h _edge_pos */ |
| 1451 | if (x + p->xblen > p->width +EDGE_WIDTH/2 || |
| 1452 | y + p->yblen > p->height+EDGE_WIDTH/2 || |
| 1453 | x < 0 || y < 0) { |
| 1454 | for (i = 0; i < nplanes; i++) { |
| 1455 | s->vdsp.emulated_edge_mc(s->edge_emu_buffer[i], src[i], |
| 1456 | p->stride, p->stride, |
| 1457 | p->xblen, p->yblen, x, y, |
| 1458 | p->width+EDGE_WIDTH/2, p->height+EDGE_WIDTH/2); |
| 1459 | src[i] = s->edge_emu_buffer[i]; |
| 1460 | } |
| 1461 | } |
| 1462 | return (nplanes>>1) + epel; |
| 1463 | } |
| 1464 | |
| 1465 | static void add_dc(uint16_t *dst, int dc, int stride, |
| 1466 | uint8_t *obmc_weight, int xblen, int yblen) |
| 1467 | { |
| 1468 | int x, y; |
| 1469 | dc += 128; |
| 1470 | |
| 1471 | for (y = 0; y < yblen; y++) { |
| 1472 | for (x = 0; x < xblen; x += 2) { |
| 1473 | dst[x ] += dc * obmc_weight[x ]; |
| 1474 | dst[x+1] += dc * obmc_weight[x+1]; |
| 1475 | } |
| 1476 | dst += stride; |
| 1477 | obmc_weight += MAX_BLOCKSIZE; |
| 1478 | } |
| 1479 | } |
| 1480 | |
| 1481 | static void block_mc(DiracContext *s, DiracBlock *block, |
| 1482 | uint16_t *mctmp, uint8_t *obmc_weight, |
| 1483 | int plane, int dstx, int dsty) |
| 1484 | { |
| 1485 | Plane *p = &s->plane[plane]; |
| 1486 | const uint8_t *src[5]; |
| 1487 | int idx; |
| 1488 | |
| 1489 | switch (block->ref&3) { |
| 1490 | case 0: /* DC */ |
| 1491 | add_dc(mctmp, block->u.dc[plane], p->stride, obmc_weight, p->xblen, p->yblen); |
| 1492 | return; |
| 1493 | case 1: |
| 1494 | case 2: |
| 1495 | idx = mc_subpel(s, block, src, dstx, dsty, (block->ref&3)-1, plane); |
| 1496 | s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); |
| 1497 | if (s->weight_func) |
| 1498 | s->weight_func(s->mcscratch, p->stride, s->weight_log2denom, |
| 1499 | s->weight[0] + s->weight[1], p->yblen); |
| 1500 | break; |
| 1501 | case 3: |
| 1502 | idx = mc_subpel(s, block, src, dstx, dsty, 0, plane); |
| 1503 | s->put_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); |
| 1504 | idx = mc_subpel(s, block, src, dstx, dsty, 1, plane); |
| 1505 | if (s->biweight_func) { |
| 1506 | /* fixme: +32 is a quick hack */ |
| 1507 | s->put_pixels_tab[idx](s->mcscratch + 32, src, p->stride, p->yblen); |
| 1508 | s->biweight_func(s->mcscratch, s->mcscratch+32, p->stride, s->weight_log2denom, |
| 1509 | s->weight[0], s->weight[1], p->yblen); |
| 1510 | } else |
| 1511 | s->avg_pixels_tab[idx](s->mcscratch, src, p->stride, p->yblen); |
| 1512 | break; |
| 1513 | } |
| 1514 | s->add_obmc(mctmp, s->mcscratch, p->stride, obmc_weight, p->yblen); |
| 1515 | } |
| 1516 | |
| 1517 | static void mc_row(DiracContext *s, DiracBlock *block, uint16_t *mctmp, int plane, int dsty) |
| 1518 | { |
| 1519 | Plane *p = &s->plane[plane]; |
| 1520 | int x, dstx = p->xbsep - p->xoffset; |
| 1521 | |
| 1522 | block_mc(s, block, mctmp, s->obmc_weight[0], plane, -p->xoffset, dsty); |
| 1523 | mctmp += p->xbsep; |
| 1524 | |
| 1525 | for (x = 1; x < s->blwidth-1; x++) { |
| 1526 | block_mc(s, block+x, mctmp, s->obmc_weight[1], plane, dstx, dsty); |
| 1527 | dstx += p->xbsep; |
| 1528 | mctmp += p->xbsep; |
| 1529 | } |
| 1530 | block_mc(s, block+x, mctmp, s->obmc_weight[2], plane, dstx, dsty); |
| 1531 | } |
| 1532 | |
| 1533 | static void select_dsp_funcs(DiracContext *s, int width, int height, int xblen, int yblen) |
| 1534 | { |
| 1535 | int idx = 0; |
| 1536 | if (xblen > 8) |
| 1537 | idx = 1; |
| 1538 | if (xblen > 16) |
| 1539 | idx = 2; |
| 1540 | |
| 1541 | memcpy(s->put_pixels_tab, s->diracdsp.put_dirac_pixels_tab[idx], sizeof(s->put_pixels_tab)); |
| 1542 | memcpy(s->avg_pixels_tab, s->diracdsp.avg_dirac_pixels_tab[idx], sizeof(s->avg_pixels_tab)); |
| 1543 | s->add_obmc = s->diracdsp.add_dirac_obmc[idx]; |
| 1544 | if (s->weight_log2denom > 1 || s->weight[0] != 1 || s->weight[1] != 1) { |
| 1545 | s->weight_func = s->diracdsp.weight_dirac_pixels_tab[idx]; |
| 1546 | s->biweight_func = s->diracdsp.biweight_dirac_pixels_tab[idx]; |
| 1547 | } else { |
| 1548 | s->weight_func = NULL; |
| 1549 | s->biweight_func = NULL; |
| 1550 | } |
| 1551 | } |
| 1552 | |
| 1553 | static void interpolate_refplane(DiracContext *s, DiracFrame *ref, int plane, int width, int height) |
| 1554 | { |
| 1555 | /* chroma allocates an edge of 8 when subsampled |
| 1556 | which for 4:2:2 means an h edge of 16 and v edge of 8 |
| 1557 | just use 8 for everything for the moment */ |
| 1558 | int i, edge = EDGE_WIDTH/2; |
| 1559 | |
| 1560 | ref->hpel[plane][0] = ref->avframe->data[plane]; |
| 1561 | s->mpvencdsp.draw_edges(ref->hpel[plane][0], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); /* EDGE_TOP | EDGE_BOTTOM values just copied to make it build, this needs to be ensured */ |
| 1562 | |
| 1563 | /* no need for hpel if we only have fpel vectors */ |
| 1564 | if (!s->mv_precision) |
| 1565 | return; |
| 1566 | |
| 1567 | for (i = 1; i < 4; i++) { |
| 1568 | if (!ref->hpel_base[plane][i]) |
| 1569 | ref->hpel_base[plane][i] = av_malloc((height+2*edge) * ref->avframe->linesize[plane] + 32); |
| 1570 | /* we need to be 16-byte aligned even for chroma */ |
| 1571 | ref->hpel[plane][i] = ref->hpel_base[plane][i] + edge*ref->avframe->linesize[plane] + 16; |
| 1572 | } |
| 1573 | |
| 1574 | if (!ref->interpolated[plane]) { |
| 1575 | s->diracdsp.dirac_hpel_filter(ref->hpel[plane][1], ref->hpel[plane][2], |
| 1576 | ref->hpel[plane][3], ref->hpel[plane][0], |
| 1577 | ref->avframe->linesize[plane], width, height); |
| 1578 | s->mpvencdsp.draw_edges(ref->hpel[plane][1], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); |
| 1579 | s->mpvencdsp.draw_edges(ref->hpel[plane][2], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); |
| 1580 | s->mpvencdsp.draw_edges(ref->hpel[plane][3], ref->avframe->linesize[plane], width, height, edge, edge, EDGE_TOP | EDGE_BOTTOM); |
| 1581 | } |
| 1582 | ref->interpolated[plane] = 1; |
| 1583 | } |
| 1584 | |
| 1585 | /** |
| 1586 | * Dirac Specification -> |
| 1587 | * 13.0 Transform data syntax. transform_data() |
| 1588 | */ |
| 1589 | static int dirac_decode_frame_internal(DiracContext *s) |
| 1590 | { |
| 1591 | DWTContext d; |
| 1592 | int y, i, comp, dsty; |
| 1593 | |
| 1594 | if (s->low_delay) { |
| 1595 | /* [DIRAC_STD] 13.5.1 low_delay_transform_data() */ |
| 1596 | for (comp = 0; comp < 3; comp++) { |
| 1597 | Plane *p = &s->plane[comp]; |
| 1598 | memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); |
| 1599 | } |
| 1600 | if (!s->zero_res) |
| 1601 | decode_lowdelay(s); |
| 1602 | } |
| 1603 | |
| 1604 | for (comp = 0; comp < 3; comp++) { |
| 1605 | Plane *p = &s->plane[comp]; |
| 1606 | uint8_t *frame = s->current_picture->avframe->data[comp]; |
| 1607 | |
| 1608 | /* FIXME: small resolutions */ |
| 1609 | for (i = 0; i < 4; i++) |
| 1610 | s->edge_emu_buffer[i] = s->edge_emu_buffer_base + i*FFALIGN(p->width, 16); |
| 1611 | |
| 1612 | if (!s->zero_res && !s->low_delay) |
| 1613 | { |
| 1614 | memset(p->idwt_buf, 0, p->idwt_stride * p->idwt_height * sizeof(IDWTELEM)); |
| 1615 | decode_component(s, comp); /* [DIRAC_STD] 13.4.1 core_transform_data() */ |
| 1616 | } |
| 1617 | if (ff_spatial_idwt_init2(&d, p->idwt_buf, p->idwt_width, p->idwt_height, p->idwt_stride, |
| 1618 | s->wavelet_idx+2, s->wavelet_depth, p->idwt_tmp)) |
| 1619 | return -1; |
| 1620 | |
| 1621 | if (!s->num_refs) { /* intra */ |
| 1622 | for (y = 0; y < p->height; y += 16) { |
| 1623 | ff_spatial_idwt_slice2(&d, y+16); /* decode */ |
| 1624 | s->diracdsp.put_signed_rect_clamped(frame + y*p->stride, p->stride, |
| 1625 | p->idwt_buf + y*p->idwt_stride, p->idwt_stride, p->width, 16); |
| 1626 | } |
| 1627 | } else { /* inter */ |
| 1628 | int rowheight = p->ybsep*p->stride; |
| 1629 | |
| 1630 | select_dsp_funcs(s, p->width, p->height, p->xblen, p->yblen); |
| 1631 | |
| 1632 | for (i = 0; i < s->num_refs; i++) |
| 1633 | interpolate_refplane(s, s->ref_pics[i], comp, p->width, p->height); |
| 1634 | |
| 1635 | memset(s->mctmp, 0, 4*p->yoffset*p->stride); |
| 1636 | |
| 1637 | dsty = -p->yoffset; |
| 1638 | for (y = 0; y < s->blheight; y++) { |
| 1639 | int h = 0, |
| 1640 | start = FFMAX(dsty, 0); |
| 1641 | uint16_t *mctmp = s->mctmp + y*rowheight; |
| 1642 | DiracBlock *blocks = s->blmotion + y*s->blwidth; |
| 1643 | |
| 1644 | init_obmc_weights(s, p, y); |
| 1645 | |
| 1646 | if (y == s->blheight-1 || start+p->ybsep > p->height) |
| 1647 | h = p->height - start; |
| 1648 | else |
| 1649 | h = p->ybsep - (start - dsty); |
| 1650 | if (h < 0) |
| 1651 | break; |
| 1652 | |
| 1653 | memset(mctmp+2*p->yoffset*p->stride, 0, 2*rowheight); |
| 1654 | mc_row(s, blocks, mctmp, comp, dsty); |
| 1655 | |
| 1656 | mctmp += (start - dsty)*p->stride + p->xoffset; |
| 1657 | ff_spatial_idwt_slice2(&d, start + h); /* decode */ |
| 1658 | s->diracdsp.add_rect_clamped(frame + start*p->stride, mctmp, p->stride, |
| 1659 | p->idwt_buf + start*p->idwt_stride, p->idwt_stride, p->width, h); |
| 1660 | |
| 1661 | dsty += p->ybsep; |
| 1662 | } |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | return 0; |
| 1668 | } |
| 1669 | |
| 1670 | static int get_buffer_with_edge(AVCodecContext *avctx, AVFrame *f, int flags) |
| 1671 | { |
| 1672 | int ret, i; |
| 1673 | int chroma_x_shift, chroma_y_shift; |
| 1674 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &chroma_x_shift, &chroma_y_shift); |
| 1675 | |
| 1676 | f->width = avctx->width + 2 * EDGE_WIDTH; |
| 1677 | f->height = avctx->height + 2 * EDGE_WIDTH + 2; |
| 1678 | ret = ff_get_buffer(avctx, f, flags); |
| 1679 | if (ret < 0) |
| 1680 | return ret; |
| 1681 | |
| 1682 | for (i = 0; f->data[i]; i++) { |
| 1683 | int offset = (EDGE_WIDTH >> (i && i<3 ? chroma_y_shift : 0)) * |
| 1684 | f->linesize[i] + 32; |
| 1685 | f->data[i] += offset; |
| 1686 | } |
| 1687 | f->width = avctx->width; |
| 1688 | f->height = avctx->height; |
| 1689 | |
| 1690 | return 0; |
| 1691 | } |
| 1692 | |
| 1693 | /** |
| 1694 | * Dirac Specification -> |
| 1695 | * 11.1.1 Picture Header. picture_header() |
| 1696 | */ |
| 1697 | static int dirac_decode_picture_header(DiracContext *s) |
| 1698 | { |
| 1699 | int retire, picnum; |
| 1700 | int i, j, refnum, refdist; |
| 1701 | GetBitContext *gb = &s->gb; |
| 1702 | |
| 1703 | /* [DIRAC_STD] 11.1.1 Picture Header. picture_header() PICTURE_NUM */ |
| 1704 | picnum = s->current_picture->avframe->display_picture_number = get_bits_long(gb, 32); |
| 1705 | |
| 1706 | |
| 1707 | av_log(s->avctx,AV_LOG_DEBUG,"PICTURE_NUM: %d\n",picnum); |
| 1708 | |
| 1709 | /* if this is the first keyframe after a sequence header, start our |
| 1710 | reordering from here */ |
| 1711 | if (s->frame_number < 0) |
| 1712 | s->frame_number = picnum; |
| 1713 | |
| 1714 | s->ref_pics[0] = s->ref_pics[1] = NULL; |
| 1715 | for (i = 0; i < s->num_refs; i++) { |
| 1716 | refnum = picnum + dirac_get_se_golomb(gb); |
| 1717 | refdist = INT_MAX; |
| 1718 | |
| 1719 | /* find the closest reference to the one we want */ |
| 1720 | /* Jordi: this is needed if the referenced picture hasn't yet arrived */ |
| 1721 | for (j = 0; j < MAX_REFERENCE_FRAMES && refdist; j++) |
| 1722 | if (s->ref_frames[j] |
| 1723 | && FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum) < refdist) { |
| 1724 | s->ref_pics[i] = s->ref_frames[j]; |
| 1725 | refdist = FFABS(s->ref_frames[j]->avframe->display_picture_number - refnum); |
| 1726 | } |
| 1727 | |
| 1728 | if (!s->ref_pics[i] || refdist) |
| 1729 | av_log(s->avctx, AV_LOG_DEBUG, "Reference not found\n"); |
| 1730 | |
| 1731 | /* if there were no references at all, allocate one */ |
| 1732 | if (!s->ref_pics[i]) |
| 1733 | for (j = 0; j < MAX_FRAMES; j++) |
| 1734 | if (!s->all_frames[j].avframe->data[0]) { |
| 1735 | s->ref_pics[i] = &s->all_frames[j]; |
| 1736 | get_buffer_with_edge(s->avctx, s->ref_pics[i]->avframe, AV_GET_BUFFER_FLAG_REF); |
| 1737 | break; |
| 1738 | } |
| 1739 | } |
| 1740 | |
| 1741 | /* retire the reference frames that are not used anymore */ |
| 1742 | if (s->current_picture->avframe->reference) { |
| 1743 | retire = picnum + dirac_get_se_golomb(gb); |
| 1744 | if (retire != picnum) { |
| 1745 | DiracFrame *retire_pic = remove_frame(s->ref_frames, retire); |
| 1746 | |
| 1747 | if (retire_pic) |
| 1748 | retire_pic->avframe->reference &= DELAYED_PIC_REF; |
| 1749 | else |
| 1750 | av_log(s->avctx, AV_LOG_DEBUG, "Frame to retire not found\n"); |
| 1751 | } |
| 1752 | |
| 1753 | /* if reference array is full, remove the oldest as per the spec */ |
| 1754 | while (add_frame(s->ref_frames, MAX_REFERENCE_FRAMES, s->current_picture)) { |
| 1755 | av_log(s->avctx, AV_LOG_ERROR, "Reference frame overflow\n"); |
| 1756 | remove_frame(s->ref_frames, s->ref_frames[0]->avframe->display_picture_number)->avframe->reference &= DELAYED_PIC_REF; |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | if (s->num_refs) { |
| 1761 | if (dirac_unpack_prediction_parameters(s)) /* [DIRAC_STD] 11.2 Picture Prediction Data. picture_prediction() */ |
| 1762 | return -1; |
| 1763 | if (dirac_unpack_block_motion_data(s)) /* [DIRAC_STD] 12. Block motion data syntax */ |
| 1764 | return -1; |
| 1765 | } |
| 1766 | if (dirac_unpack_idwt_params(s)) /* [DIRAC_STD] 11.3 Wavelet transform data */ |
| 1767 | return -1; |
| 1768 | |
| 1769 | init_planes(s); |
| 1770 | return 0; |
| 1771 | } |
| 1772 | |
| 1773 | static int get_delayed_pic(DiracContext *s, AVFrame *picture, int *got_frame) |
| 1774 | { |
| 1775 | DiracFrame *out = s->delay_frames[0]; |
| 1776 | int i, out_idx = 0; |
| 1777 | int ret; |
| 1778 | |
| 1779 | /* find frame with lowest picture number */ |
| 1780 | for (i = 1; s->delay_frames[i]; i++) |
| 1781 | if (s->delay_frames[i]->avframe->display_picture_number < out->avframe->display_picture_number) { |
| 1782 | out = s->delay_frames[i]; |
| 1783 | out_idx = i; |
| 1784 | } |
| 1785 | |
| 1786 | for (i = out_idx; s->delay_frames[i]; i++) |
| 1787 | s->delay_frames[i] = s->delay_frames[i+1]; |
| 1788 | |
| 1789 | if (out) { |
| 1790 | out->avframe->reference ^= DELAYED_PIC_REF; |
| 1791 | *got_frame = 1; |
| 1792 | if((ret = av_frame_ref(picture, out->avframe)) < 0) |
| 1793 | return ret; |
| 1794 | } |
| 1795 | |
| 1796 | return 0; |
| 1797 | } |
| 1798 | |
| 1799 | /** |
| 1800 | * Dirac Specification -> |
| 1801 | * 9.6 Parse Info Header Syntax. parse_info() |
| 1802 | * 4 byte start code + byte parse code + 4 byte size + 4 byte previous size |
| 1803 | */ |
| 1804 | #define DATA_UNIT_HEADER_SIZE 13 |
| 1805 | |
| 1806 | /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 |
| 1807 | inside the function parse_sequence() */ |
| 1808 | static int dirac_decode_data_unit(AVCodecContext *avctx, const uint8_t *buf, int size) |
| 1809 | { |
| 1810 | DiracContext *s = avctx->priv_data; |
| 1811 | DiracFrame *pic = NULL; |
| 1812 | int ret, i, parse_code = buf[4]; |
| 1813 | unsigned tmp; |
| 1814 | |
| 1815 | if (size < DATA_UNIT_HEADER_SIZE) |
| 1816 | return -1; |
| 1817 | |
| 1818 | init_get_bits(&s->gb, &buf[13], 8*(size - DATA_UNIT_HEADER_SIZE)); |
| 1819 | |
| 1820 | if (parse_code == pc_seq_header) { |
| 1821 | if (s->seen_sequence_header) |
| 1822 | return 0; |
| 1823 | |
| 1824 | /* [DIRAC_STD] 10. Sequence header */ |
| 1825 | if (avpriv_dirac_parse_sequence_header(avctx, &s->gb, &s->source)) |
| 1826 | return -1; |
| 1827 | |
| 1828 | avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift); |
| 1829 | |
| 1830 | if (alloc_sequence_buffers(s)) |
| 1831 | return -1; |
| 1832 | |
| 1833 | s->seen_sequence_header = 1; |
| 1834 | } else if (parse_code == pc_eos) { /* [DIRAC_STD] End of Sequence */ |
| 1835 | free_sequence_buffers(s); |
| 1836 | s->seen_sequence_header = 0; |
| 1837 | } else if (parse_code == pc_aux_data) { |
| 1838 | if (buf[13] == 1) { /* encoder implementation/version */ |
| 1839 | int ver[3]; |
| 1840 | /* versions older than 1.0.8 don't store quant delta for |
| 1841 | subbands with only one codeblock */ |
| 1842 | if (sscanf(buf+14, "Schroedinger %d.%d.%d", ver, ver+1, ver+2) == 3) |
| 1843 | if (ver[0] == 1 && ver[1] == 0 && ver[2] <= 7) |
| 1844 | s->old_delta_quant = 1; |
| 1845 | } |
| 1846 | } else if (parse_code & 0x8) { /* picture data unit */ |
| 1847 | if (!s->seen_sequence_header) { |
| 1848 | av_log(avctx, AV_LOG_DEBUG, "Dropping frame without sequence header\n"); |
| 1849 | return -1; |
| 1850 | } |
| 1851 | |
| 1852 | /* find an unused frame */ |
| 1853 | for (i = 0; i < MAX_FRAMES; i++) |
| 1854 | if (s->all_frames[i].avframe->data[0] == NULL) |
| 1855 | pic = &s->all_frames[i]; |
| 1856 | if (!pic) { |
| 1857 | av_log(avctx, AV_LOG_ERROR, "framelist full\n"); |
| 1858 | return -1; |
| 1859 | } |
| 1860 | |
| 1861 | av_frame_unref(pic->avframe); |
| 1862 | |
| 1863 | /* [DIRAC_STD] Defined in 9.6.1 ... */ |
| 1864 | tmp = parse_code & 0x03; /* [DIRAC_STD] num_refs() */ |
| 1865 | if (tmp > 2) { |
| 1866 | av_log(avctx, AV_LOG_ERROR, "num_refs of 3\n"); |
| 1867 | return -1; |
| 1868 | } |
| 1869 | s->num_refs = tmp; |
| 1870 | s->is_arith = (parse_code & 0x48) == 0x08; /* [DIRAC_STD] using_ac() */ |
| 1871 | s->low_delay = (parse_code & 0x88) == 0x88; /* [DIRAC_STD] is_low_delay() */ |
| 1872 | pic->avframe->reference = (parse_code & 0x0C) == 0x0C; /* [DIRAC_STD] is_reference() */ |
| 1873 | pic->avframe->key_frame = s->num_refs == 0; /* [DIRAC_STD] is_intra() */ |
| 1874 | pic->avframe->pict_type = s->num_refs + 1; /* Definition of AVPictureType in avutil.h */ |
| 1875 | |
| 1876 | if ((ret = get_buffer_with_edge(avctx, pic->avframe, (parse_code & 0x0C) == 0x0C ? AV_GET_BUFFER_FLAG_REF : 0)) < 0) |
| 1877 | return ret; |
| 1878 | s->current_picture = pic; |
| 1879 | s->plane[0].stride = pic->avframe->linesize[0]; |
| 1880 | s->plane[1].stride = pic->avframe->linesize[1]; |
| 1881 | s->plane[2].stride = pic->avframe->linesize[2]; |
| 1882 | |
| 1883 | if (alloc_buffers(s, FFMAX3(FFABS(s->plane[0].stride), FFABS(s->plane[1].stride), FFABS(s->plane[2].stride))) < 0) |
| 1884 | return AVERROR(ENOMEM); |
| 1885 | |
| 1886 | /* [DIRAC_STD] 11.1 Picture parse. picture_parse() */ |
| 1887 | if (dirac_decode_picture_header(s)) |
| 1888 | return -1; |
| 1889 | |
| 1890 | /* [DIRAC_STD] 13.0 Transform data syntax. transform_data() */ |
| 1891 | if (dirac_decode_frame_internal(s)) |
| 1892 | return -1; |
| 1893 | } |
| 1894 | return 0; |
| 1895 | } |
| 1896 | |
| 1897 | static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *pkt) |
| 1898 | { |
| 1899 | DiracContext *s = avctx->priv_data; |
| 1900 | AVFrame *picture = data; |
| 1901 | uint8_t *buf = pkt->data; |
| 1902 | int buf_size = pkt->size; |
| 1903 | int i, data_unit_size, buf_idx = 0; |
| 1904 | int ret; |
| 1905 | |
| 1906 | /* release unused frames */ |
| 1907 | for (i = 0; i < MAX_FRAMES; i++) |
| 1908 | if (s->all_frames[i].avframe->data[0] && !s->all_frames[i].avframe->reference) { |
| 1909 | av_frame_unref(s->all_frames[i].avframe); |
| 1910 | memset(s->all_frames[i].interpolated, 0, sizeof(s->all_frames[i].interpolated)); |
| 1911 | } |
| 1912 | |
| 1913 | s->current_picture = NULL; |
| 1914 | *got_frame = 0; |
| 1915 | |
| 1916 | /* end of stream, so flush delayed pics */ |
| 1917 | if (buf_size == 0) |
| 1918 | return get_delayed_pic(s, (AVFrame *)data, got_frame); |
| 1919 | |
| 1920 | for (;;) { |
| 1921 | /*[DIRAC_STD] Here starts the code from parse_info() defined in 9.6 |
| 1922 | [DIRAC_STD] PARSE_INFO_PREFIX = "BBCD" as defined in ISO/IEC 646 |
| 1923 | BBCD start code search */ |
| 1924 | for (; buf_idx + DATA_UNIT_HEADER_SIZE < buf_size; buf_idx++) { |
| 1925 | if (buf[buf_idx ] == 'B' && buf[buf_idx+1] == 'B' && |
| 1926 | buf[buf_idx+2] == 'C' && buf[buf_idx+3] == 'D') |
| 1927 | break; |
| 1928 | } |
| 1929 | /* BBCD found or end of data */ |
| 1930 | if (buf_idx + DATA_UNIT_HEADER_SIZE >= buf_size) |
| 1931 | break; |
| 1932 | |
| 1933 | data_unit_size = AV_RB32(buf+buf_idx+5); |
| 1934 | if (buf_idx + data_unit_size > buf_size || !data_unit_size) { |
| 1935 | if(buf_idx + data_unit_size > buf_size) |
| 1936 | av_log(s->avctx, AV_LOG_ERROR, |
| 1937 | "Data unit with size %d is larger than input buffer, discarding\n", |
| 1938 | data_unit_size); |
| 1939 | buf_idx += 4; |
| 1940 | continue; |
| 1941 | } |
| 1942 | /* [DIRAC_STD] dirac_decode_data_unit makes reference to the while defined in 9.3 inside the function parse_sequence() */ |
| 1943 | if (dirac_decode_data_unit(avctx, buf+buf_idx, data_unit_size)) |
| 1944 | { |
| 1945 | av_log(s->avctx, AV_LOG_ERROR,"Error in dirac_decode_data_unit\n"); |
| 1946 | return -1; |
| 1947 | } |
| 1948 | buf_idx += data_unit_size; |
| 1949 | } |
| 1950 | |
| 1951 | if (!s->current_picture) |
| 1952 | return buf_size; |
| 1953 | |
| 1954 | if (s->current_picture->avframe->display_picture_number > s->frame_number) { |
| 1955 | DiracFrame *delayed_frame = remove_frame(s->delay_frames, s->frame_number); |
| 1956 | |
| 1957 | s->current_picture->avframe->reference |= DELAYED_PIC_REF; |
| 1958 | |
| 1959 | if (add_frame(s->delay_frames, MAX_DELAY, s->current_picture)) { |
| 1960 | int min_num = s->delay_frames[0]->avframe->display_picture_number; |
| 1961 | /* Too many delayed frames, so we display the frame with the lowest pts */ |
| 1962 | av_log(avctx, AV_LOG_ERROR, "Delay frame overflow\n"); |
| 1963 | |
| 1964 | for (i = 1; s->delay_frames[i]; i++) |
| 1965 | if (s->delay_frames[i]->avframe->display_picture_number < min_num) |
| 1966 | min_num = s->delay_frames[i]->avframe->display_picture_number; |
| 1967 | |
| 1968 | delayed_frame = remove_frame(s->delay_frames, min_num); |
| 1969 | add_frame(s->delay_frames, MAX_DELAY, s->current_picture); |
| 1970 | } |
| 1971 | |
| 1972 | if (delayed_frame) { |
| 1973 | delayed_frame->avframe->reference ^= DELAYED_PIC_REF; |
| 1974 | if((ret=av_frame_ref(data, delayed_frame->avframe)) < 0) |
| 1975 | return ret; |
| 1976 | *got_frame = 1; |
| 1977 | } |
| 1978 | } else if (s->current_picture->avframe->display_picture_number == s->frame_number) { |
| 1979 | /* The right frame at the right time :-) */ |
| 1980 | if((ret=av_frame_ref(data, s->current_picture->avframe)) < 0) |
| 1981 | return ret; |
| 1982 | *got_frame = 1; |
| 1983 | } |
| 1984 | |
| 1985 | if (*got_frame) |
| 1986 | s->frame_number = picture->display_picture_number + 1; |
| 1987 | |
| 1988 | return buf_idx; |
| 1989 | } |
| 1990 | |
| 1991 | AVCodec ff_dirac_decoder = { |
| 1992 | .name = "dirac", |
| 1993 | .long_name = NULL_IF_CONFIG_SMALL("BBC Dirac VC-2"), |
| 1994 | .type = AVMEDIA_TYPE_VIDEO, |
| 1995 | .id = AV_CODEC_ID_DIRAC, |
| 1996 | .priv_data_size = sizeof(DiracContext), |
| 1997 | .init = dirac_decode_init, |
| 1998 | .close = dirac_decode_end, |
| 1999 | .decode = dirac_decode_frame, |
| 2000 | .capabilities = CODEC_CAP_DELAY, |
| 2001 | .flush = dirac_decode_flush, |
| 2002 | }; |