Libav
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00001 /* 00002 * RV40 decoder 00003 * Copyright (c) 2007 Konstantin Shishkov 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #include "avcodec.h" 00028 #include "dsputil.h" 00029 #include "mpegvideo.h" 00030 #include "golomb.h" 00031 00032 #include "rv34.h" 00033 #include "rv40vlc2.h" 00034 #include "rv40data.h" 00035 00036 static VLC aic_top_vlc; 00037 static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM]; 00038 static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS]; 00039 00040 static const int16_t mode2_offs[] = { 00041 0, 614, 1222, 1794, 2410, 3014, 3586, 4202, 4792, 5382, 5966, 6542, 00042 7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814 00043 }; 00044 00048 static av_cold void rv40_init_tables(void) 00049 { 00050 int i; 00051 static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2]; 00052 static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2]; 00053 static VLC_TYPE aic_mode2_table[11814][2]; 00054 static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2]; 00055 static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2]; 00056 00057 aic_top_vlc.table = aic_table; 00058 aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS; 00059 init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE, 00060 rv40_aic_top_vlc_bits, 1, 1, 00061 rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); 00062 for(i = 0; i < AIC_MODE1_NUM; i++){ 00063 // Every tenth VLC table is empty 00064 if((i % 10) == 9) continue; 00065 aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS]; 00066 aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS; 00067 init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE, 00068 aic_mode1_vlc_bits[i], 1, 1, 00069 aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); 00070 } 00071 for(i = 0; i < AIC_MODE2_NUM; i++){ 00072 aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]]; 00073 aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i]; 00074 init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE, 00075 aic_mode2_vlc_bits[i], 1, 1, 00076 aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); 00077 } 00078 for(i = 0; i < NUM_PTYPE_VLCS; i++){ 00079 ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS]; 00080 ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS; 00081 init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE, 00082 ptype_vlc_bits[i], 1, 1, 00083 ptype_vlc_codes[i], 1, 1, 00084 ptype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); 00085 } 00086 for(i = 0; i < NUM_BTYPE_VLCS; i++){ 00087 btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS]; 00088 btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS; 00089 init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE, 00090 btype_vlc_bits[i], 1, 1, 00091 btype_vlc_codes[i], 1, 1, 00092 btype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); 00093 } 00094 } 00095 00102 static int get_dimension(GetBitContext *gb, const int *dim) 00103 { 00104 int t = get_bits(gb, 3); 00105 int val = dim[t]; 00106 if(val < 0) 00107 val = dim[get_bits1(gb) - val]; 00108 if(!val){ 00109 do{ 00110 t = get_bits(gb, 8); 00111 val += t << 2; 00112 }while(t == 0xFF); 00113 } 00114 return val; 00115 } 00116 00120 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h) 00121 { 00122 *w = get_dimension(gb, rv40_standard_widths); 00123 *h = get_dimension(gb, rv40_standard_heights); 00124 } 00125 00126 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si) 00127 { 00128 int mb_bits; 00129 int w = r->s.width, h = r->s.height; 00130 int mb_size; 00131 00132 memset(si, 0, sizeof(SliceInfo)); 00133 if(get_bits1(gb)) 00134 return -1; 00135 si->type = get_bits(gb, 2); 00136 if(si->type == 1) si->type = 0; 00137 si->quant = get_bits(gb, 5); 00138 if(get_bits(gb, 2)) 00139 return -1; 00140 si->vlc_set = get_bits(gb, 2); 00141 skip_bits1(gb); 00142 si->pts = get_bits(gb, 13); 00143 if(!si->type || !get_bits1(gb)) 00144 rv40_parse_picture_size(gb, &w, &h); 00145 if(avcodec_check_dimensions(r->s.avctx, w, h) < 0) 00146 return -1; 00147 si->width = w; 00148 si->height = h; 00149 mb_size = ((w + 15) >> 4) * ((h + 15) >> 4); 00150 mb_bits = ff_rv34_get_start_offset(gb, mb_size); 00151 si->start = get_bits(gb, mb_bits); 00152 00153 return 0; 00154 } 00155 00159 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst) 00160 { 00161 MpegEncContext *s = &r->s; 00162 int i, j, k, v; 00163 int A, B, C; 00164 int pattern; 00165 int8_t *ptr; 00166 00167 for(i = 0; i < 4; i++, dst += r->intra_types_stride){ 00168 if(!i && s->first_slice_line){ 00169 pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1); 00170 dst[0] = (pattern >> 2) & 2; 00171 dst[1] = (pattern >> 1) & 2; 00172 dst[2] = pattern & 2; 00173 dst[3] = (pattern << 1) & 2; 00174 continue; 00175 } 00176 ptr = dst; 00177 for(j = 0; j < 4; j++){ 00178 /* Coefficients are read using VLC chosen by the prediction pattern 00179 * The first one (used for retrieving a pair of coefficients) is 00180 * constructed from the top, top right and left coefficients 00181 * The second one (used for retrieving only one coefficient) is 00182 * top + 10 * left. 00183 */ 00184 A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row 00185 B = ptr[-r->intra_types_stride]; 00186 C = ptr[-1]; 00187 pattern = A + (B << 4) + (C << 8); 00188 for(k = 0; k < MODE2_PATTERNS_NUM; k++) 00189 if(pattern == rv40_aic_table_index[k]) 00190 break; 00191 if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients 00192 v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2); 00193 *ptr++ = v/9; 00194 *ptr++ = v%9; 00195 j++; 00196 }else{ 00197 if(B != -1 && C != -1) 00198 v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1); 00199 else{ // tricky decoding 00200 v = 0; 00201 switch(C){ 00202 case -1: // code 0 -> 1, 1 -> 0 00203 if(B < 2) 00204 v = get_bits1(gb) ^ 1; 00205 break; 00206 case 0: 00207 case 2: // code 0 -> 2, 1 -> 0 00208 v = (get_bits1(gb) ^ 1) << 1; 00209 break; 00210 } 00211 } 00212 *ptr++ = v; 00213 } 00214 } 00215 } 00216 return 0; 00217 } 00218 00222 static int rv40_decode_mb_info(RV34DecContext *r) 00223 { 00224 MpegEncContext *s = &r->s; 00225 GetBitContext *gb = &s->gb; 00226 int q, i; 00227 int prev_type = 0; 00228 int mb_pos = s->mb_x + s->mb_y * s->mb_stride; 00229 int blocks[RV34_MB_TYPES] = {0}; 00230 int count = 0; 00231 00232 if(!r->s.mb_skip_run) 00233 r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1; 00234 00235 if(--r->s.mb_skip_run) 00236 return RV34_MB_SKIP; 00237 00238 if(r->avail_cache[6-1]) 00239 blocks[r->mb_type[mb_pos - 1]]++; 00240 if(r->avail_cache[6-4]){ 00241 blocks[r->mb_type[mb_pos - s->mb_stride]]++; 00242 if(r->avail_cache[6-2]) 00243 blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; 00244 if(r->avail_cache[6-5]) 00245 blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++; 00246 } 00247 00248 for(i = 0; i < RV34_MB_TYPES; i++){ 00249 if(blocks[i] > count){ 00250 count = blocks[i]; 00251 prev_type = i; 00252 } 00253 } 00254 if(s->pict_type == FF_P_TYPE){ 00255 prev_type = block_num_to_ptype_vlc_num[prev_type]; 00256 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); 00257 if(q < PBTYPE_ESCAPE) 00258 return q; 00259 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); 00260 av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n"); 00261 }else{ 00262 prev_type = block_num_to_btype_vlc_num[prev_type]; 00263 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); 00264 if(q < PBTYPE_ESCAPE) 00265 return q; 00266 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); 00267 av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); 00268 } 00269 return 0; 00270 } 00271 00272 #define CLIP_SYMM(a, b) av_clip(a, -(b), b) 00273 00276 static inline void rv40_weak_loop_filter(uint8_t *src, const int step, 00277 const int filter_p1, const int filter_q1, 00278 const int alpha, const int beta, 00279 const int lim_p0q0, 00280 const int lim_q1, const int lim_p1, 00281 const int diff_p1p0, const int diff_q1q0, 00282 const int diff_p1p2, const int diff_q1q2) 00283 { 00284 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; 00285 int t, u, diff; 00286 00287 t = src[0*step] - src[-1*step]; 00288 if(!t) 00289 return; 00290 u = (alpha * FFABS(t)) >> 7; 00291 if(u > 3 - (filter_p1 && filter_q1)) 00292 return; 00293 00294 t <<= 2; 00295 if(filter_p1 && filter_q1) 00296 t += src[-2*step] - src[1*step]; 00297 diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0); 00298 src[-1*step] = cm[src[-1*step] + diff]; 00299 src[ 0*step] = cm[src[ 0*step] - diff]; 00300 if(FFABS(diff_p1p2) <= beta && filter_p1){ 00301 t = (diff_p1p0 + diff_p1p2 - diff) >> 1; 00302 src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)]; 00303 } 00304 if(FFABS(diff_q1q2) <= beta && filter_q1){ 00305 t = (diff_q1q0 + diff_q1q2 + diff) >> 1; 00306 src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)]; 00307 } 00308 } 00309 00310 static inline void rv40_adaptive_loop_filter(uint8_t *src, const int step, 00311 const int stride, const int dmode, 00312 const int lim_q1, const int lim_p1, 00313 const int alpha, 00314 const int beta, const int beta2, 00315 const int chroma, const int edge) 00316 { 00317 int diff_p1p0[4], diff_q1q0[4], diff_p1p2[4], diff_q1q2[4]; 00318 int sum_p1p0 = 0, sum_q1q0 = 0, sum_p1p2 = 0, sum_q1q2 = 0; 00319 uint8_t *ptr; 00320 int flag_strong0 = 1, flag_strong1 = 1; 00321 int filter_p1, filter_q1; 00322 int i; 00323 int lims; 00324 00325 for(i = 0, ptr = src; i < 4; i++, ptr += stride){ 00326 diff_p1p0[i] = ptr[-2*step] - ptr[-1*step]; 00327 diff_q1q0[i] = ptr[ 1*step] - ptr[ 0*step]; 00328 sum_p1p0 += diff_p1p0[i]; 00329 sum_q1q0 += diff_q1q0[i]; 00330 } 00331 filter_p1 = FFABS(sum_p1p0) < (beta<<2); 00332 filter_q1 = FFABS(sum_q1q0) < (beta<<2); 00333 if(!filter_p1 && !filter_q1) 00334 return; 00335 00336 for(i = 0, ptr = src; i < 4; i++, ptr += stride){ 00337 diff_p1p2[i] = ptr[-2*step] - ptr[-3*step]; 00338 diff_q1q2[i] = ptr[ 1*step] - ptr[ 2*step]; 00339 sum_p1p2 += diff_p1p2[i]; 00340 sum_q1q2 += diff_q1q2[i]; 00341 } 00342 00343 if(edge){ 00344 flag_strong0 = filter_p1 && (FFABS(sum_p1p2) < beta2); 00345 flag_strong1 = filter_q1 && (FFABS(sum_q1q2) < beta2); 00346 }else{ 00347 flag_strong0 = flag_strong1 = 0; 00348 } 00349 00350 lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; 00351 if(flag_strong0 && flag_strong1){ /* strong filtering */ 00352 for(i = 0; i < 4; i++, src += stride){ 00353 int sflag, p0, q0, p1, q1; 00354 int t = src[0*step] - src[-1*step]; 00355 00356 if(!t) continue; 00357 sflag = (alpha * FFABS(t)) >> 7; 00358 if(sflag > 1) continue; 00359 00360 p0 = (25*src[-3*step] + 26*src[-2*step] 00361 + 26*src[-1*step] 00362 + 26*src[ 0*step] + 25*src[ 1*step] + rv40_dither_l[dmode + i]) >> 7; 00363 q0 = (25*src[-2*step] + 26*src[-1*step] 00364 + 26*src[ 0*step] 00365 + 26*src[ 1*step] + 25*src[ 2*step] + rv40_dither_r[dmode + i]) >> 7; 00366 if(sflag){ 00367 p0 = av_clip(p0, src[-1*step] - lims, src[-1*step] + lims); 00368 q0 = av_clip(q0, src[ 0*step] - lims, src[ 0*step] + lims); 00369 } 00370 p1 = (25*src[-4*step] + 26*src[-3*step] 00371 + 26*src[-2*step] 00372 + 26*p0 + 25*src[ 0*step] + rv40_dither_l[dmode + i]) >> 7; 00373 q1 = (25*src[-1*step] + 26*q0 00374 + 26*src[ 1*step] 00375 + 26*src[ 2*step] + 25*src[ 3*step] + rv40_dither_r[dmode + i]) >> 7; 00376 if(sflag){ 00377 p1 = av_clip(p1, src[-2*step] - lims, src[-2*step] + lims); 00378 q1 = av_clip(q1, src[ 1*step] - lims, src[ 1*step] + lims); 00379 } 00380 src[-2*step] = p1; 00381 src[-1*step] = p0; 00382 src[ 0*step] = q0; 00383 src[ 1*step] = q1; 00384 if(!chroma){ 00385 src[-3*step] = (25*src[-1*step] + 26*src[-2*step] + 51*src[-3*step] + 26*src[-4*step] + 64) >> 7; 00386 src[ 2*step] = (25*src[ 0*step] + 26*src[ 1*step] + 51*src[ 2*step] + 26*src[ 3*step] + 64) >> 7; 00387 } 00388 } 00389 }else if(filter_p1 && filter_q1){ 00390 for(i = 0; i < 4; i++, src += stride) 00391 rv40_weak_loop_filter(src, step, 1, 1, alpha, beta, lims, lim_q1, lim_p1, 00392 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); 00393 }else{ 00394 for(i = 0; i < 4; i++, src += stride) 00395 rv40_weak_loop_filter(src, step, filter_p1, filter_q1, 00396 alpha, beta, lims>>1, lim_q1>>1, lim_p1>>1, 00397 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); 00398 } 00399 } 00400 00401 static void rv40_v_loop_filter(uint8_t *src, int stride, int dmode, 00402 int lim_q1, int lim_p1, 00403 int alpha, int beta, int beta2, int chroma, int edge){ 00404 rv40_adaptive_loop_filter(src, 1, stride, dmode, lim_q1, lim_p1, 00405 alpha, beta, beta2, chroma, edge); 00406 } 00407 static void rv40_h_loop_filter(uint8_t *src, int stride, int dmode, 00408 int lim_q1, int lim_p1, 00409 int alpha, int beta, int beta2, int chroma, int edge){ 00410 rv40_adaptive_loop_filter(src, stride, 1, dmode, lim_q1, lim_p1, 00411 alpha, beta, beta2, chroma, edge); 00412 } 00413 00414 enum RV40BlockPos{ 00415 POS_CUR, 00416 POS_TOP, 00417 POS_LEFT, 00418 POS_BOTTOM, 00419 }; 00420 00421 #define MASK_CUR 0x0001 00422 #define MASK_RIGHT 0x0008 00423 #define MASK_BOTTOM 0x0010 00424 #define MASK_TOP 0x1000 00425 #define MASK_Y_TOP_ROW 0x000F 00426 #define MASK_Y_LAST_ROW 0xF000 00427 #define MASK_Y_LEFT_COL 0x1111 00428 #define MASK_Y_RIGHT_COL 0x8888 00429 #define MASK_C_TOP_ROW 0x0003 00430 #define MASK_C_LAST_ROW 0x000C 00431 #define MASK_C_LEFT_COL 0x0005 00432 #define MASK_C_RIGHT_COL 0x000A 00433 00434 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 }; 00435 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 }; 00436 00440 static void rv40_loop_filter(RV34DecContext *r, int row) 00441 { 00442 MpegEncContext *s = &r->s; 00443 int mb_pos, mb_x; 00444 int i, j, k; 00445 uint8_t *Y, *C; 00446 int alpha, beta, betaY, betaC; 00447 int q; 00448 int mbtype[4]; 00449 00453 int mb_strong[4]; 00454 int clip[4]; 00455 00461 int cbp[4]; 00466 int uvcbp[4][2]; 00472 int mvmasks[4]; 00473 00474 mb_pos = row * s->mb_stride; 00475 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ 00476 int mbtype = s->current_picture_ptr->mb_type[mb_pos]; 00477 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype)) 00478 r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF; 00479 if(IS_INTRA(mbtype)) 00480 r->cbp_chroma[mb_pos] = 0xFF; 00481 } 00482 mb_pos = row * s->mb_stride; 00483 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ 00484 int y_h_deblock, y_v_deblock; 00485 int c_v_deblock[2], c_h_deblock[2]; 00486 int clip_left; 00487 int avail[4]; 00488 int y_to_deblock, c_to_deblock[2]; 00489 00490 q = s->current_picture_ptr->qscale_table[mb_pos]; 00491 alpha = rv40_alpha_tab[q]; 00492 beta = rv40_beta_tab [q]; 00493 betaY = betaC = beta * 3; 00494 if(s->width * s->height <= 176*144) 00495 betaY += beta; 00496 00497 avail[0] = 1; 00498 avail[1] = row; 00499 avail[2] = mb_x; 00500 avail[3] = row < s->mb_height - 1; 00501 for(i = 0; i < 4; i++){ 00502 if(avail[i]){ 00503 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride; 00504 mvmasks[i] = r->deblock_coefs[pos]; 00505 mbtype [i] = s->current_picture_ptr->mb_type[pos]; 00506 cbp [i] = r->cbp_luma[pos]; 00507 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF; 00508 uvcbp[i][1] = r->cbp_chroma[pos] >> 4; 00509 }else{ 00510 mvmasks[i] = 0; 00511 mbtype [i] = mbtype[0]; 00512 cbp [i] = 0; 00513 uvcbp[i][0] = uvcbp[i][1] = 0; 00514 } 00515 mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]); 00516 clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q]; 00517 } 00518 y_to_deblock = mvmasks[POS_CUR] 00519 | (mvmasks[POS_BOTTOM] << 16); 00520 /* This pattern contains bits signalling that horizontal edges of 00521 * the current block can be filtered. 00522 * That happens when either of adjacent subblocks is coded or lies on 00523 * the edge of 8x8 blocks with motion vectors differing by more than 00524 * 3/4 pel in any component (any edge orientation for some reason). 00525 */ 00526 y_h_deblock = y_to_deblock 00527 | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW) 00528 | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12); 00529 /* This pattern contains bits signalling that vertical edges of 00530 * the current block can be filtered. 00531 * That happens when either of adjacent subblocks is coded or lies on 00532 * the edge of 8x8 blocks with motion vectors differing by more than 00533 * 3/4 pel in any component (any edge orientation for some reason). 00534 */ 00535 y_v_deblock = y_to_deblock 00536 | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL) 00537 | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3); 00538 if(!mb_x) 00539 y_v_deblock &= ~MASK_Y_LEFT_COL; 00540 if(!row) 00541 y_h_deblock &= ~MASK_Y_TOP_ROW; 00542 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] || mb_strong[POS_BOTTOM])) 00543 y_h_deblock &= ~(MASK_Y_TOP_ROW << 16); 00544 /* Calculating chroma patterns is similar and easier since there is 00545 * no motion vector pattern for them. 00546 */ 00547 for(i = 0; i < 2; i++){ 00548 c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i]; 00549 c_v_deblock[i] = c_to_deblock[i] 00550 | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL) 00551 | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1); 00552 c_h_deblock[i] = c_to_deblock[i] 00553 | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2) 00554 | (uvcbp[POS_CUR][i] << 2); 00555 if(!mb_x) 00556 c_v_deblock[i] &= ~MASK_C_LEFT_COL; 00557 if(!row) 00558 c_h_deblock[i] &= ~MASK_C_TOP_ROW; 00559 if(row == s->mb_height - 1 || mb_strong[POS_CUR] || mb_strong[POS_BOTTOM]) 00560 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4); 00561 } 00562 00563 for(j = 0; j < 16; j += 4){ 00564 Y = s->current_picture_ptr->data[0] + mb_x*16 + (row*16 + j) * s->linesize; 00565 for(i = 0; i < 4; i++, Y += 4){ 00566 int ij = i + j; 00567 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0; 00568 int dither = j ? ij : i*4; 00569 00570 // if bottom block is coded then we can filter its top edge 00571 // (or bottom edge of this block, which is the same) 00572 if(y_h_deblock & (MASK_BOTTOM << ij)){ 00573 rv40_h_loop_filter(Y+4*s->linesize, s->linesize, dither, 00574 y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0, 00575 clip_cur, 00576 alpha, beta, betaY, 0, 0); 00577 } 00578 // filter left block edge in ordinary mode (with low filtering strength) 00579 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){ 00580 if(!i) 00581 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; 00582 else 00583 clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; 00584 rv40_v_loop_filter(Y, s->linesize, dither, 00585 clip_cur, 00586 clip_left, 00587 alpha, beta, betaY, 0, 0); 00588 } 00589 // filter top edge of the current macroblock when filtering strength is high 00590 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){ 00591 rv40_h_loop_filter(Y, s->linesize, dither, 00592 clip_cur, 00593 mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0, 00594 alpha, beta, betaY, 0, 1); 00595 } 00596 // filter left block edge in edge mode (with high filtering strength) 00597 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){ 00598 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; 00599 rv40_v_loop_filter(Y, s->linesize, dither, 00600 clip_cur, 00601 clip_left, 00602 alpha, beta, betaY, 0, 1); 00603 } 00604 } 00605 } 00606 for(k = 0; k < 2; k++){ 00607 for(j = 0; j < 2; j++){ 00608 C = s->current_picture_ptr->data[k+1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize; 00609 for(i = 0; i < 2; i++, C += 4){ 00610 int ij = i + j*2; 00611 int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0; 00612 if(c_h_deblock[k] & (MASK_CUR << (ij+2))){ 00613 int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0; 00614 rv40_h_loop_filter(C+4*s->uvlinesize, s->uvlinesize, i*8, 00615 clip_bot, 00616 clip_cur, 00617 alpha, beta, betaC, 1, 0); 00618 } 00619 if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){ 00620 if(!i) 00621 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; 00622 else 00623 clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; 00624 rv40_v_loop_filter(C, s->uvlinesize, j*8, 00625 clip_cur, 00626 clip_left, 00627 alpha, beta, betaC, 1, 0); 00628 } 00629 if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){ 00630 int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0; 00631 rv40_h_loop_filter(C, s->uvlinesize, i*8, 00632 clip_cur, 00633 clip_top, 00634 alpha, beta, betaC, 1, 1); 00635 } 00636 if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){ 00637 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; 00638 rv40_v_loop_filter(C, s->uvlinesize, j*8, 00639 clip_cur, 00640 clip_left, 00641 alpha, beta, betaC, 1, 1); 00642 } 00643 } 00644 } 00645 } 00646 } 00647 } 00648 00652 static av_cold int rv40_decode_init(AVCodecContext *avctx) 00653 { 00654 RV34DecContext *r = avctx->priv_data; 00655 00656 r->rv30 = 0; 00657 ff_rv34_decode_init(avctx); 00658 if(!aic_top_vlc.bits) 00659 rv40_init_tables(); 00660 r->parse_slice_header = rv40_parse_slice_header; 00661 r->decode_intra_types = rv40_decode_intra_types; 00662 r->decode_mb_info = rv40_decode_mb_info; 00663 r->loop_filter = rv40_loop_filter; 00664 r->luma_dc_quant_i = rv40_luma_dc_quant[0]; 00665 r->luma_dc_quant_p = rv40_luma_dc_quant[1]; 00666 return 0; 00667 } 00668 00669 AVCodec rv40_decoder = { 00670 "rv40", 00671 AVMEDIA_TYPE_VIDEO, 00672 CODEC_ID_RV40, 00673 sizeof(RV34DecContext), 00674 rv40_decode_init, 00675 NULL, 00676 ff_rv34_decode_end, 00677 ff_rv34_decode_frame, 00678 CODEC_CAP_DR1 | CODEC_CAP_DELAY, 00679 .flush = ff_mpeg_flush, 00680 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"), 00681 .pix_fmts= ff_pixfmt_list_420, 00682 };