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| 1 : | Isibaar | 3 | /************************************************************************** |
| 2 : | * | ||
| 3 : | * XVID MPEG-4 VIDEO CODEC | ||
| 4 : | * decoder main | ||
| 5 : | * | ||
| 6 : | * This program is an implementation of a part of one or more MPEG-4 | ||
| 7 : | * Video tools as specified in ISO/IEC 14496-2 standard. Those intending | ||
| 8 : | * to use this software module in hardware or software products are | ||
| 9 : | * advised that its use may infringe existing patents or copyrights, and | ||
| 10 : | * any such use would be at such party's own risk. The original | ||
| 11 : | * developer of this software module and his/her company, and subsequent | ||
| 12 : | * editors and their companies, will have no liability for use of this | ||
| 13 : | * software or modifications or derivatives thereof. | ||
| 14 : | * | ||
| 15 : | Isibaar | 41 | * This program is xvid_free software; you can redistribute it and/or modify |
| 16 : | Isibaar | 3 | * it under the terms of the GNU General Public License as published by |
| 17 : | Isibaar | 41 | * the xvid_free Software Foundation; either version 2 of the License, or |
| 18 : | Isibaar | 3 | * (at your option) any later version. |
| 19 : | * | ||
| 20 : | * This program is distributed in the hope that it will be useful, | ||
| 21 : | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 22 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 23 : | * GNU General Public License for more details. | ||
| 24 : | * | ||
| 25 : | * You should have received a copy of the GNU General Public License | ||
| 26 : | Isibaar | 41 | * along with this program; if not, write to the xvid_free Software |
| 27 : | Isibaar | 3 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 28 : | * | ||
| 29 : | *************************************************************************/ | ||
| 30 : | |||
| 31 : | /************************************************************************** | ||
| 32 : | * | ||
| 33 : | * History: | ||
| 34 : | * | ||
| 35 : | h | 81 | * 29.03.2002 interlacing fix - compensated block wasn't being used when |
| 36 : | * reconstructing blocks, thus artifacts | ||
| 37 : | * interlacing speedup - used transfers to re-interlace | ||
| 38 : | * interlaced decoding should be as fast as progressive now | ||
| 39 : | h | 69 | * 26.03.2002 interlacing support - moved transfers outside decode loop |
| 40 : | Isibaar | 3 | * 26.12.2001 decoder_mbinter: dequant/idct moved within if(coded) block |
| 41 : | * 22.12.2001 block based interpolation | ||
| 42 : | * 01.12.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> | ||
| 43 : | * | ||
| 44 : | *************************************************************************/ | ||
| 45 : | |||
| 46 : | #include <stdlib.h> | ||
| 47 : | #include <string.h> // memset | ||
| 48 : | |||
| 49 : | #include "xvid.h" | ||
| 50 : | #include "portab.h" | ||
| 51 : | |||
| 52 : | #include "decoder.h" | ||
| 53 : | #include "bitstream/bitstream.h" | ||
| 54 : | #include "bitstream/mbcoding.h" | ||
| 55 : | |||
| 56 : | #include "quant/quant_h263.h" | ||
| 57 : | #include "quant/quant_mpeg4.h" | ||
| 58 : | #include "dct/idct.h" | ||
| 59 : | #include "dct/fdct.h" | ||
| 60 : | #include "utils/mem_transfer.h" | ||
| 61 : | #include "image/interpolate8x8.h" | ||
| 62 : | |||
| 63 : | #include "bitstream/mbcoding.h" | ||
| 64 : | #include "prediction/mbprediction.h" | ||
| 65 : | #include "utils/timer.h" | ||
| 66 : | #include "utils/emms.h" | ||
| 67 : | |||
| 68 : | #include "image/image.h" | ||
| 69 : | #include "image/colorspace.h" | ||
| 70 : | Isibaar | 41 | #include "utils/mem_align.h" |
| 71 : | Isibaar | 3 | |
| 72 : | int decoder_create(XVID_DEC_PARAM * param) | ||
| 73 : | { | ||
| 74 : | DECODER * dec; | ||
| 75 : | |||
| 76 : | Isibaar | 42 | dec = xvid_malloc(sizeof(DECODER), CACHE_LINE); |
| 77 : | Isibaar | 3 | if (dec == NULL) |
| 78 : | { | ||
| 79 : | return XVID_ERR_MEMORY; | ||
| 80 : | } | ||
| 81 : | param->handle = dec; | ||
| 82 : | |||
| 83 : | dec->width = param->width; | ||
| 84 : | dec->height = param->height; | ||
| 85 : | |||
| 86 : | dec->mb_width = (dec->width + 15) / 16; | ||
| 87 : | dec->mb_height = (dec->height + 15) / 16; | ||
| 88 : | |||
| 89 : | dec->edged_width = 16 * dec->mb_width + 2 * EDGE_SIZE; | ||
| 90 : | dec->edged_height = 16 * dec->mb_height + 2 * EDGE_SIZE; | ||
| 91 : | |||
| 92 : | if (image_create(&dec->cur, dec->edged_width, dec->edged_height)) | ||
| 93 : | { | ||
| 94 : | Isibaar | 41 | xvid_free(dec); |
| 95 : | Isibaar | 3 | return XVID_ERR_MEMORY; |
| 96 : | } | ||
| 97 : | |||
| 98 : | if (image_create(&dec->refn, dec->edged_width, dec->edged_height)) | ||
| 99 : | { | ||
| 100 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
| 101 : | Isibaar | 41 | xvid_free(dec); |
| 102 : | Isibaar | 3 | return XVID_ERR_MEMORY; |
| 103 : | } | ||
| 104 : | |||
| 105 : | Isibaar | 42 | dec->mbs = xvid_malloc(sizeof(MACROBLOCK) * dec->mb_width * dec->mb_height, CACHE_LINE); |
| 106 : | Isibaar | 3 | if (dec->mbs == NULL) |
| 107 : | { | ||
| 108 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
| 109 : | Isibaar | 41 | xvid_free(dec); |
| 110 : | Isibaar | 3 | return XVID_ERR_MEMORY; |
| 111 : | } | ||
| 112 : | |||
| 113 : | init_timer(); | ||
| 114 : | create_vlc_tables(); | ||
| 115 : | |||
| 116 : | return XVID_ERR_OK; | ||
| 117 : | } | ||
| 118 : | |||
| 119 : | |||
| 120 : | int decoder_destroy(DECODER * dec) | ||
| 121 : | { | ||
| 122 : | Isibaar | 41 | xvid_free(dec->mbs); |
| 123 : | Isibaar | 3 | image_destroy(&dec->refn, dec->edged_width, dec->edged_height); |
| 124 : | image_destroy(&dec->cur, dec->edged_width, dec->edged_height); | ||
| 125 : | Isibaar | 41 | xvid_free(dec); |
| 126 : | Isibaar | 3 | |
| 127 : | destroy_vlc_tables(); | ||
| 128 : | |||
| 129 : | write_timer(); | ||
| 130 : | return XVID_ERR_OK; | ||
| 131 : | } | ||
| 132 : | |||
| 133 : | |||
| 134 : | |||
| 135 : | static const int32_t dquant_table[4] = | ||
| 136 : | { | ||
| 137 : | -1, -2, 1, 2 | ||
| 138 : | }; | ||
| 139 : | |||
| 140 : | |||
| 141 : | // decode an intra macroblock | ||
| 142 : | |||
| 143 : | h | 69 | void decoder_mbintra(DECODER * dec, |
| 144 : | edgomez | 78 | MACROBLOCK * pMB, |
| 145 : | const uint32_t x_pos, | ||
| 146 : | const uint32_t y_pos, | ||
| 147 : | const uint32_t acpred_flag, | ||
| 148 : | const uint32_t cbp, | ||
| 149 : | Bitstream * bs, | ||
| 150 : | const uint32_t quant, | ||
| 151 : | const uint32_t intra_dc_threshold) | ||
| 152 : | Isibaar | 3 | { |
| 153 : | edgomez | 78 | |
| 154 : | DECLARE_ALIGNED_MATRIX(block, 6, 64, int16_t, CACHE_LINE); | ||
| 155 : | DECLARE_ALIGNED_MATRIX(data, 6, 64, int16_t, CACHE_LINE); | ||
| 156 : | |||
| 157 : | h | 81 | uint32_t stride = dec->edged_width; |
| 158 : | uint32_t stride2 = stride / 2; | ||
| 159 : | uint32_t next_block = stride * 8; | ||
| 160 : | h | 69 | uint32_t i; |
| 161 : | uint32_t iQuant = pMB->quant; | ||
| 162 : | uint8_t *pY_Cur, *pU_Cur, *pV_Cur; | ||
| 163 : | |||
| 164 : | edgomez | 78 | pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); |
| 165 : | h | 81 | pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
| 166 : | pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); | ||
| 167 : | h | 69 | |
| 168 : | edgomez | 78 | memset(block, 0, 6*64*sizeof(int16_t)); // clear |
| 169 : | h | 69 | |
| 170 : | for (i = 0; i < 6; i++) | ||
| 171 : | Isibaar | 3 | { |
| 172 : | h | 69 | uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4); |
| 173 : | Isibaar | 3 | int16_t predictors[8]; |
| 174 : | int start_coeff; | ||
| 175 : | |||
| 176 : | start_timer(); | ||
| 177 : | edgomez | 78 | predict_acdc(dec->mbs, x_pos, y_pos, dec->mb_width, i, &block[i*64], iQuant, iDcScaler, predictors); |
| 178 : | Isibaar | 3 | if (!acpred_flag) |
| 179 : | { | ||
| 180 : | h | 69 | pMB->acpred_directions[i] = 0; |
| 181 : | Isibaar | 3 | } |
| 182 : | stop_prediction_timer(); | ||
| 183 : | |||
| 184 : | if (quant < intra_dc_threshold) | ||
| 185 : | { | ||
| 186 : | int dc_size; | ||
| 187 : | int dc_dif; | ||
| 188 : | |||
| 189 : | h | 69 | dc_size = i < 4 ? get_dc_size_lum(bs) : get_dc_size_chrom(bs); |
| 190 : | Isibaar | 3 | dc_dif = dc_size ? get_dc_dif(bs, dc_size) : 0 ; |
| 191 : | |||
| 192 : | if (dc_size > 8) | ||
| 193 : | { | ||
| 194 : | BitstreamSkip(bs, 1); // marker | ||
| 195 : | } | ||
| 196 : | |||
| 197 : | edgomez | 78 | block[i*64 + 0] = dc_dif; |
| 198 : | Isibaar | 3 | start_coeff = 1; |
| 199 : | } | ||
| 200 : | else | ||
| 201 : | { | ||
| 202 : | start_coeff = 0; | ||
| 203 : | } | ||
| 204 : | |||
| 205 : | start_timer(); | ||
| 206 : | h | 69 | if (cbp & (1 << (5-i))) // coded |
| 207 : | Isibaar | 3 | { |
| 208 : | edgomez | 78 | get_intra_block(bs, &block[i*64], pMB->acpred_directions[i], start_coeff); |
| 209 : | Isibaar | 3 | } |
| 210 : | stop_coding_timer(); | ||
| 211 : | |||
| 212 : | start_timer(); | ||
| 213 : | edgomez | 78 | add_acdc(pMB, i, &block[i*64], iDcScaler, predictors); |
| 214 : | Isibaar | 3 | stop_prediction_timer(); |
| 215 : | |||
| 216 : | start_timer(); | ||
| 217 : | if (dec->quant_type == 0) | ||
| 218 : | { | ||
| 219 : | edgomez | 78 | dequant_intra(&data[i*64], &block[i*64], iQuant, iDcScaler); |
| 220 : | Isibaar | 3 | } |
| 221 : | else | ||
| 222 : | { | ||
| 223 : | edgomez | 78 | dequant4_intra(&data[i*64], &block[i*64], iQuant, iDcScaler); |
| 224 : | Isibaar | 3 | } |
| 225 : | stop_iquant_timer(); | ||
| 226 : | |||
| 227 : | start_timer(); | ||
| 228 : | edgomez | 78 | idct(&data[i*64]); |
| 229 : | Isibaar | 3 | stop_idct_timer(); |
| 230 : | h | 69 | } |
| 231 : | Isibaar | 3 | |
| 232 : | h | 81 | if (pMB->field_dct) |
| 233 : | h | 69 | { |
| 234 : | h | 81 | next_block = stride; |
| 235 : | stride *= 2; | ||
| 236 : | Isibaar | 3 | } |
| 237 : | h | 69 | |
| 238 : | start_timer(); | ||
| 239 : | edgomez | 78 | transfer_16to8copy(pY_Cur, &data[0*64], stride); |
| 240 : | transfer_16to8copy(pY_Cur + 8, &data[1*64], stride); | ||
| 241 : | h | 81 | transfer_16to8copy(pY_Cur + next_block, &data[2*64], stride); |
| 242 : | transfer_16to8copy(pY_Cur + 8 + next_block, &data[3*64], stride); | ||
| 243 : | transfer_16to8copy(pU_Cur, &data[4*64], stride2); | ||
| 244 : | transfer_16to8copy(pV_Cur, &data[5*64], stride2); | ||
| 245 : | h | 69 | stop_transfer_timer(); |
| 246 : | Isibaar | 3 | } |
| 247 : | |||
| 248 : | |||
| 249 : | |||
| 250 : | |||
| 251 : | |||
| 252 : | #define SIGN(X) (((X)>0)?1:-1) | ||
| 253 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
| 254 : | static const uint32_t roundtab[16] = | ||
| 255 : | edgomez | 78 | { 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; |
| 256 : | Isibaar | 3 | |
| 257 : | |||
| 258 : | // decode an inter macroblock | ||
| 259 : | |||
| 260 : | h | 69 | void decoder_mbinter(DECODER * dec, |
| 261 : | edgomez | 78 | const MACROBLOCK * pMB, |
| 262 : | const uint32_t x_pos, | ||
| 263 : | const uint32_t y_pos, | ||
| 264 : | const uint32_t acpred_flag, | ||
| 265 : | const uint32_t cbp, | ||
| 266 : | Bitstream * bs, | ||
| 267 : | const uint32_t quant, | ||
| 268 : | const uint32_t rounding) | ||
| 269 : | Isibaar | 3 | { |
| 270 : | h | 69 | |
| 271 : | edgomez | 78 | DECLARE_ALIGNED_MATRIX(block,6, 64, int16_t, CACHE_LINE); |
| 272 : | DECLARE_ALIGNED_MATRIX(data, 6, 64, int16_t, CACHE_LINE); | ||
| 273 : | |||
| 274 : | h | 81 | uint32_t stride = dec->edged_width; |
| 275 : | uint32_t stride2 = stride / 2; | ||
| 276 : | uint32_t next_block = stride * 8; | ||
| 277 : | edgomez | 78 | uint32_t i; |
| 278 : | uint32_t iQuant = pMB->quant; | ||
| 279 : | h | 69 | uint8_t *pY_Cur, *pU_Cur, *pV_Cur; |
| 280 : | Isibaar | 3 | int uv_dx, uv_dy; |
| 281 : | |||
| 282 : | edgomez | 78 | pY_Cur = dec->cur.y + (y_pos << 4) * stride + (x_pos << 4); |
| 283 : | h | 81 | pU_Cur = dec->cur.u + (y_pos << 3) * stride2 + (x_pos << 3); |
| 284 : | pV_Cur = dec->cur.v + (y_pos << 3) * stride2 + (x_pos << 3); | ||
| 285 : | h | 69 | |
| 286 : | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) | ||
| 287 : | Isibaar | 3 | { |
| 288 : | h | 69 | uv_dx = pMB->mvs[0].x; |
| 289 : | uv_dy = pMB->mvs[0].y; | ||
| 290 : | Isibaar | 3 | |
| 291 : | uv_dx = (uv_dx & 3) ? (uv_dx >> 1) | 1 : uv_dx / 2; | ||
| 292 : | uv_dy = (uv_dy & 3) ? (uv_dy >> 1) | 1 : uv_dy / 2; | ||
| 293 : | } | ||
| 294 : | else | ||
| 295 : | { | ||
| 296 : | int sum; | ||
| 297 : | h | 69 | sum = pMB->mvs[0].x + pMB->mvs[1].x + pMB->mvs[2].x + pMB->mvs[3].x; |
| 298 : | Isibaar | 3 | uv_dx = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) ); |
| 299 : | |||
| 300 : | h | 69 | sum = pMB->mvs[0].y + pMB->mvs[1].y + pMB->mvs[2].y + pMB->mvs[3].y; |
| 301 : | Isibaar | 3 | uv_dy = (sum == 0 ? 0 : SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) ); |
| 302 : | } | ||
| 303 : | |||
| 304 : | start_timer(); | ||
| 305 : | h | 69 | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos, 16*y_pos , pMB->mvs[0].x, pMB->mvs[0].y, stride, rounding); |
| 306 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos + 8, 16*y_pos , pMB->mvs[1].x, pMB->mvs[1].y, stride, rounding); | ||
| 307 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos, 16*y_pos + 8, pMB->mvs[2].x, pMB->mvs[2].y, stride, rounding); | ||
| 308 : | interpolate8x8_switch(dec->cur.y, dec->refn.y, 16*x_pos + 8, 16*y_pos + 8, pMB->mvs[3].x, pMB->mvs[3].y, stride, rounding); | ||
| 309 : | interpolate8x8_switch(dec->cur.u, dec->refn.u, 8*x_pos, 8*y_pos, uv_dx, uv_dy, stride2, rounding); | ||
| 310 : | interpolate8x8_switch(dec->cur.v, dec->refn.v, 8*x_pos, 8*y_pos, uv_dx, uv_dy, stride2, rounding); | ||
| 311 : | Isibaar | 3 | stop_comp_timer(); |
| 312 : | |||
| 313 : | h | 69 | for (i = 0; i < 6; i++) |
| 314 : | Isibaar | 3 | { |
| 315 : | h | 69 | if (cbp & (1 << (5-i))) // coded |
| 316 : | Isibaar | 3 | { |
| 317 : | edgomez | 78 | memset(&block[i*64], 0, 64 * sizeof(int16_t)); // clear |
| 318 : | Isibaar | 3 | |
| 319 : | start_timer(); | ||
| 320 : | edgomez | 78 | get_inter_block(bs, &block[i*64]); |
| 321 : | Isibaar | 3 | stop_coding_timer(); |
| 322 : | |||
| 323 : | start_timer(); | ||
| 324 : | if (dec->quant_type == 0) | ||
| 325 : | { | ||
| 326 : | edgomez | 78 | dequant_inter(&data[i*64], &block[i*64], iQuant); |
| 327 : | Isibaar | 3 | } |
| 328 : | else | ||
| 329 : | { | ||
| 330 : | edgomez | 78 | dequant4_inter(&data[i*64], &block[i*64], iQuant); |
| 331 : | Isibaar | 3 | } |
| 332 : | stop_iquant_timer(); | ||
| 333 : | |||
| 334 : | start_timer(); | ||
| 335 : | edgomez | 78 | idct(&data[i*64]); |
| 336 : | Isibaar | 3 | stop_idct_timer(); |
| 337 : | } | ||
| 338 : | } | ||
| 339 : | h | 69 | |
| 340 : | if (pMB->field_dct) | ||
| 341 : | { | ||
| 342 : | h | 81 | next_block = stride; |
| 343 : | stride *= 2; | ||
| 344 : | h | 69 | } |
| 345 : | |||
| 346 : | start_timer(); | ||
| 347 : | if (cbp & 32) | ||
| 348 : | edgomez | 78 | transfer_16to8add(pY_Cur, &data[0*64], stride); |
| 349 : | h | 69 | if (cbp & 16) |
| 350 : | edgomez | 78 | transfer_16to8add(pY_Cur + 8, &data[1*64], stride); |
| 351 : | h | 69 | if (cbp & 8) |
| 352 : | h | 81 | transfer_16to8add(pY_Cur + next_block, &data[2*64], stride); |
| 353 : | h | 69 | if (cbp & 4) |
| 354 : | h | 81 | transfer_16to8add(pY_Cur + 8 + next_block, &data[3*64], stride); |
| 355 : | h | 69 | if (cbp & 2) |
| 356 : | h | 81 | transfer_16to8add(pU_Cur, &data[4*64], stride2); |
| 357 : | h | 69 | if (cbp & 1) |
| 358 : | h | 81 | transfer_16to8add(pV_Cur, &data[5*64], stride2); |
| 359 : | h | 69 | stop_transfer_timer(); |
| 360 : | Isibaar | 3 | } |
| 361 : | |||
| 362 : | |||
| 363 : | void decoder_iframe(DECODER * dec, Bitstream * bs, int quant, int intra_dc_threshold) | ||
| 364 : | { | ||
| 365 : | edgomez | 78 | |
| 366 : | Isibaar | 3 | uint32_t x, y; |
| 367 : | |||
| 368 : | for (y = 0; y < dec->mb_height; y++) | ||
| 369 : | { | ||
| 370 : | for (x = 0; x < dec->mb_width; x++) | ||
| 371 : | { | ||
| 372 : | MACROBLOCK * mb = &dec->mbs[y*dec->mb_width + x]; | ||
| 373 : | |||
| 374 : | uint32_t mcbpc; | ||
| 375 : | uint32_t cbpc; | ||
| 376 : | uint32_t acpred_flag; | ||
| 377 : | uint32_t cbpy; | ||
| 378 : | uint32_t cbp; | ||
| 379 : | |||
| 380 : | mcbpc = get_mcbpc_intra(bs); | ||
| 381 : | mb->mode = mcbpc & 7; | ||
| 382 : | cbpc = (mcbpc >> 4); | ||
| 383 : | |||
| 384 : | acpred_flag = BitstreamGetBit(bs); | ||
| 385 : | |||
| 386 : | if (mb->mode == MODE_STUFFING) | ||
| 387 : | { | ||
| 388 : | DEBUG("-- STUFFING ?"); | ||
| 389 : | continue; | ||
| 390 : | } | ||
| 391 : | |||
| 392 : | cbpy = get_cbpy(bs, 1); | ||
| 393 : | cbp = (cbpy << 2) | cbpc; | ||
| 394 : | |||
| 395 : | if (mb->mode == MODE_INTRA_Q) | ||
| 396 : | { | ||
| 397 : | quant += dquant_table[BitstreamGetBits(bs,2)]; | ||
| 398 : | if (quant > 31) | ||
| 399 : | { | ||
| 400 : | quant = 31; | ||
| 401 : | } | ||
| 402 : | else if (quant < 1) | ||
| 403 : | { | ||
| 404 : | quant = 1; | ||
| 405 : | } | ||
| 406 : | } | ||
| 407 : | mb->quant = quant; | ||
| 408 : | |||
| 409 : | h | 69 | if (dec->interlacing) |
| 410 : | { | ||
| 411 : | mb->field_dct = BitstreamGetBit(bs); | ||
| 412 : | DEBUG1("deci: field_dct: ", mb->field_dct); | ||
| 413 : | } | ||
| 414 : | |||
| 415 : | Isibaar | 3 | decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, intra_dc_threshold); |
| 416 : | } | ||
| 417 : | } | ||
| 418 : | edgomez | 78 | |
| 419 : | Isibaar | 3 | } |
| 420 : | |||
| 421 : | |||
| 422 : | void get_motion_vector(DECODER *dec, Bitstream *bs, int x, int y, int k, VECTOR * mv, int fcode) | ||
| 423 : | { | ||
| 424 : | edgomez | 78 | |
| 425 : | Isibaar | 3 | int scale_fac = 1 << (fcode - 1); |
| 426 : | int high = (32 * scale_fac) - 1; | ||
| 427 : | int low = ((-32) * scale_fac); | ||
| 428 : | int range = (64 * scale_fac); | ||
| 429 : | |||
| 430 : | VECTOR pmv[4]; | ||
| 431 : | uint32_t psad[4]; | ||
| 432 : | |||
| 433 : | int mv_x, mv_y; | ||
| 434 : | int pmv_x, pmv_y; | ||
| 435 : | |||
| 436 : | |||
| 437 : | get_pmvdata(dec->mbs, x, y, dec->mb_width, k, pmv, psad); | ||
| 438 : | |||
| 439 : | pmv_x = pmv[0].x; | ||
| 440 : | pmv_y = pmv[0].y; | ||
| 441 : | |||
| 442 : | mv_x = get_mv(bs, fcode); | ||
| 443 : | mv_y = get_mv(bs, fcode); | ||
| 444 : | |||
| 445 : | mv_x += pmv_x; | ||
| 446 : | mv_y += pmv_y; | ||
| 447 : | |||
| 448 : | if (mv_x < low) | ||
| 449 : | { | ||
| 450 : | mv_x += range; | ||
| 451 : | } | ||
| 452 : | else if (mv_x > high) | ||
| 453 : | { | ||
| 454 : | mv_x -= range; | ||
| 455 : | } | ||
| 456 : | |||
| 457 : | if (mv_y < low) | ||
| 458 : | { | ||
| 459 : | mv_y += range; | ||
| 460 : | } | ||
| 461 : | else if (mv_y > high) | ||
| 462 : | { | ||
| 463 : | mv_y -= range; | ||
| 464 : | } | ||
| 465 : | |||
| 466 : | mv->x = mv_x; | ||
| 467 : | mv->y = mv_y; | ||
| 468 : | |||
| 469 : | } | ||
| 470 : | |||
| 471 : | |||
| 472 : | void decoder_pframe(DECODER * dec, Bitstream * bs, int rounding, int quant, int fcode, int intra_dc_threshold) | ||
| 473 : | { | ||
| 474 : | edgomez | 78 | |
| 475 : | Isibaar | 3 | uint32_t x, y; |
| 476 : | |||
| 477 : | image_swap(&dec->cur, &dec->refn); | ||
| 478 : | |||
| 479 : | start_timer(); | ||
| 480 : | h | 69 | image_setedges(&dec->refn, dec->edged_width, dec->edged_height, dec->width, dec->height, dec->interlacing); |
| 481 : | Isibaar | 3 | stop_edges_timer(); |
| 482 : | |||
| 483 : | for (y = 0; y < dec->mb_height; y++) | ||
| 484 : | { | ||
| 485 : | for (x = 0; x < dec->mb_width; x++) | ||
| 486 : | { | ||
| 487 : | MACROBLOCK * mb = &dec->mbs[y*dec->mb_width + x]; | ||
| 488 : | |||
| 489 : | if (!BitstreamGetBit(bs)) // not_coded | ||
| 490 : | { | ||
| 491 : | uint32_t mcbpc; | ||
| 492 : | uint32_t cbpc; | ||
| 493 : | uint32_t acpred_flag; | ||
| 494 : | uint32_t cbpy; | ||
| 495 : | uint32_t cbp; | ||
| 496 : | uint32_t intra; | ||
| 497 : | |||
| 498 : | mcbpc = get_mcbpc_inter(bs); | ||
| 499 : | mb->mode = mcbpc & 7; | ||
| 500 : | cbpc = (mcbpc >> 4); | ||
| 501 : | edgomez | 12 | acpred_flag = 0; |
| 502 : | Isibaar | 3 | |
| 503 : | intra = (mb->mode == MODE_INTRA || mb->mode == MODE_INTRA_Q); | ||
| 504 : | |||
| 505 : | if (intra) | ||
| 506 : | { | ||
| 507 : | acpred_flag = BitstreamGetBit(bs); | ||
| 508 : | } | ||
| 509 : | |||
| 510 : | if (mb->mode == MODE_STUFFING) | ||
| 511 : | { | ||
| 512 : | DEBUG("-- STUFFING ?"); | ||
| 513 : | continue; | ||
| 514 : | } | ||
| 515 : | |||
| 516 : | cbpy = get_cbpy(bs, intra); | ||
| 517 : | cbp = (cbpy << 2) | cbpc; | ||
| 518 : | |||
| 519 : | if (mb->mode == MODE_INTER_Q || mb->mode == MODE_INTRA_Q) | ||
| 520 : | { | ||
| 521 : | quant += dquant_table[BitstreamGetBits(bs,2)]; | ||
| 522 : | if (quant > 31) | ||
| 523 : | { | ||
| 524 : | quant = 31; | ||
| 525 : | } | ||
| 526 : | else if (mb->quant < 1) | ||
| 527 : | { | ||
| 528 : | quant = 1; | ||
| 529 : | } | ||
| 530 : | } | ||
| 531 : | mb->quant = quant; | ||
| 532 : | h | 69 | |
| 533 : | if (dec->interlacing) | ||
| 534 : | Isibaar | 3 | { |
| 535 : | h | 69 | mb->field_dct = BitstreamGetBit(bs); |
| 536 : | DEBUG1("decp: field_dct: ", mb->field_dct); | ||
| 537 : | Isibaar | 3 | |
| 538 : | h | 69 | if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) |
| 539 : | { | ||
| 540 : | mb->field_pred = BitstreamGetBit(bs); | ||
| 541 : | DEBUG1("decp: field_pred: ", mb->field_pred); | ||
| 542 : | |||
| 543 : | if (mb->field_pred) | ||
| 544 : | { | ||
| 545 : | mb->field_for_top = BitstreamGetBit(bs); | ||
| 546 : | DEBUG1("decp: field_for_top: ", mb->field_for_top); | ||
| 547 : | mb->field_for_bot = BitstreamGetBit(bs); | ||
| 548 : | DEBUG1("decp: field_for_bot: ", mb->field_for_bot); | ||
| 549 : | } | ||
| 550 : | } | ||
| 551 : | Isibaar | 3 | } |
| 552 : | h | 69 | |
| 553 : | if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) | ||
| 554 : | { | ||
| 555 : | if (dec->interlacing && mb->field_pred) | ||
| 556 : | { | ||
| 557 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
| 558 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[1], fcode); | ||
| 559 : | } | ||
| 560 : | else | ||
| 561 : | { | ||
| 562 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
| 563 : | mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = mb->mvs[0].x; | ||
| 564 : | mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = mb->mvs[0].y; | ||
| 565 : | } | ||
| 566 : | } | ||
| 567 : | Isibaar | 3 | else if (mb->mode == MODE_INTER4V /* || mb->mode == MODE_INTER4V_Q */) |
| 568 : | { | ||
| 569 : | get_motion_vector(dec, bs, x, y, 0, &mb->mvs[0], fcode); | ||
| 570 : | get_motion_vector(dec, bs, x, y, 1, &mb->mvs[1], fcode); | ||
| 571 : | get_motion_vector(dec, bs, x, y, 2, &mb->mvs[2], fcode); | ||
| 572 : | get_motion_vector(dec, bs, x, y, 3, &mb->mvs[3], fcode); | ||
| 573 : | } | ||
| 574 : | else // MODE_INTRA, MODE_INTRA_Q | ||
| 575 : | { | ||
| 576 : | mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; | ||
| 577 : | mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; | ||
| 578 : | decoder_mbintra(dec, mb, x, y, acpred_flag, cbp, bs, quant, intra_dc_threshold); | ||
| 579 : | continue; | ||
| 580 : | } | ||
| 581 : | |||
| 582 : | decoder_mbinter(dec, mb, x, y, acpred_flag, cbp, bs, quant, rounding); | ||
| 583 : | } | ||
| 584 : | else // not coded | ||
| 585 : | { | ||
| 586 : | |||
| 587 : | mb->mode = MODE_NOT_CODED; | ||
| 588 : | mb->mvs[0].x = mb->mvs[1].x = mb->mvs[2].x = mb->mvs[3].x = 0; | ||
| 589 : | mb->mvs[0].y = mb->mvs[1].y = mb->mvs[2].y = mb->mvs[3].y = 0; | ||
| 590 : | |||
| 591 : | // copy macroblock directly from ref to cur | ||
| 592 : | |||
| 593 : | start_timer(); | ||
| 594 : | |||
| 595 : | transfer8x8_copy(dec->cur.y + (16*y)*dec->edged_width + (16*x), | ||
| 596 : | edgomez | 78 | dec->refn.y + (16*y)*dec->edged_width + (16*x), |
| 597 : | dec->edged_width); | ||
| 598 : | Isibaar | 3 | |
| 599 : | transfer8x8_copy(dec->cur.y + (16*y)*dec->edged_width + (16*x+8), | ||
| 600 : | edgomez | 78 | dec->refn.y + (16*y)*dec->edged_width + (16*x+8), |
| 601 : | dec->edged_width); | ||
| 602 : | Isibaar | 3 | |
| 603 : | transfer8x8_copy(dec->cur.y + (16*y+8)*dec->edged_width + (16*x), | ||
| 604 : | edgomez | 78 | dec->refn.y + (16*y+8)*dec->edged_width + (16*x), |
| 605 : | dec->edged_width); | ||
| 606 : | Isibaar | 3 | |
| 607 : | transfer8x8_copy(dec->cur.y + (16*y+8)*dec->edged_width + (16*x+8), | ||
| 608 : | edgomez | 78 | dec->refn.y + (16*y+8)*dec->edged_width + (16*x+8), |
| 609 : | dec->edged_width); | ||
| 610 : | Isibaar | 3 | |
| 611 : | transfer8x8_copy(dec->cur.u + (8*y)*dec->edged_width/2 + (8*x), | ||
| 612 : | edgomez | 78 | dec->refn.u + (8*y)*dec->edged_width/2 + (8*x), |
| 613 : | dec->edged_width/2); | ||
| 614 : | Isibaar | 3 | |
| 615 : | transfer8x8_copy(dec->cur.v + (8*y)*dec->edged_width/2 + (8*x), | ||
| 616 : | edgomez | 78 | dec->refn.v + (8*y)*dec->edged_width/2 + (8*x), |
| 617 : | dec->edged_width/2); | ||
| 618 : | Isibaar | 3 | |
| 619 : | stop_transfer_timer(); | ||
| 620 : | } | ||
| 621 : | } | ||
| 622 : | } | ||
| 623 : | } | ||
| 624 : | |||
| 625 : | int decoder_decode(DECODER * dec, XVID_DEC_FRAME * frame) | ||
| 626 : | { | ||
| 627 : | edgomez | 78 | |
| 628 : | Isibaar | 3 | Bitstream bs; |
| 629 : | uint32_t rounding; | ||
| 630 : | uint32_t quant; | ||
| 631 : | uint32_t fcode; | ||
| 632 : | uint32_t intra_dc_threshold; | ||
| 633 : | |||
| 634 : | start_global_timer(); | ||
| 635 : | |||
| 636 : | BitstreamInit(&bs, frame->bitstream, frame->length); | ||
| 637 : | |||
| 638 : | switch (BitstreamReadHeaders(&bs, dec, &rounding, &quant, &fcode, &intra_dc_threshold)) | ||
| 639 : | { | ||
| 640 : | case P_VOP : | ||
| 641 : | decoder_pframe(dec, &bs, rounding, quant, fcode, intra_dc_threshold); | ||
| 642 : | break; | ||
| 643 : | |||
| 644 : | case I_VOP : | ||
| 645 : | //DEBUG1("",intra_dc_threshold); | ||
| 646 : | decoder_iframe(dec, &bs, quant, intra_dc_threshold); | ||
| 647 : | break; | ||
| 648 : | |||
| 649 : | case B_VOP : // ignore | ||
| 650 : | break; | ||
| 651 : | |||
| 652 : | case N_VOP : // vop not coded | ||
| 653 : | break; | ||
| 654 : | |||
| 655 : | default : | ||
| 656 : | return XVID_ERR_FAIL; | ||
| 657 : | } | ||
| 658 : | |||
| 659 : | frame->length = BitstreamPos(&bs) / 8; | ||
| 660 : | |||
| 661 : | start_timer(); | ||
| 662 : | image_output(&dec->cur, dec->width, dec->height, dec->edged_width, | ||
| 663 : | edgomez | 78 | frame->image, frame->stride, frame->colorspace); |
| 664 : | Isibaar | 3 | stop_conv_timer(); |
| 665 : | |||
| 666 : | emms(); | ||
| 667 : | |||
| 668 : | stop_global_timer(); | ||
| 669 : | |||
| 670 : | return XVID_ERR_OK; | ||
| 671 : | edgomez | 78 | |
| 672 : | Isibaar | 3 | } |
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