Libav 0.7.1
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00001 /* 00002 * RV40 decoder 00003 * Copyright (c) 2007 Konstantin Shishkov 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00027 #include "libavutil/imgutils.h" 00028 00029 #include "avcodec.h" 00030 #include "dsputil.h" 00031 #include "mpegvideo.h" 00032 #include "golomb.h" 00033 00034 #include "rv34.h" 00035 #include "rv40vlc2.h" 00036 #include "rv40data.h" 00037 00038 static VLC aic_top_vlc; 00039 static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM]; 00040 static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS]; 00041 00042 static const int16_t mode2_offs[] = { 00043 0, 614, 1222, 1794, 2410, 3014, 3586, 4202, 4792, 5382, 5966, 6542, 00044 7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814 00045 }; 00046 00050 static av_cold void rv40_init_tables(void) 00051 { 00052 int i; 00053 static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2]; 00054 static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2]; 00055 static VLC_TYPE aic_mode2_table[11814][2]; 00056 static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2]; 00057 static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2]; 00058 00059 aic_top_vlc.table = aic_table; 00060 aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS; 00061 init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE, 00062 rv40_aic_top_vlc_bits, 1, 1, 00063 rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); 00064 for(i = 0; i < AIC_MODE1_NUM; i++){ 00065 // Every tenth VLC table is empty 00066 if((i % 10) == 9) continue; 00067 aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS]; 00068 aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS; 00069 init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE, 00070 aic_mode1_vlc_bits[i], 1, 1, 00071 aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); 00072 } 00073 for(i = 0; i < AIC_MODE2_NUM; i++){ 00074 aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]]; 00075 aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i]; 00076 init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE, 00077 aic_mode2_vlc_bits[i], 1, 1, 00078 aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); 00079 } 00080 for(i = 0; i < NUM_PTYPE_VLCS; i++){ 00081 ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS]; 00082 ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS; 00083 init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE, 00084 ptype_vlc_bits[i], 1, 1, 00085 ptype_vlc_codes[i], 1, 1, 00086 ptype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); 00087 } 00088 for(i = 0; i < NUM_BTYPE_VLCS; i++){ 00089 btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS]; 00090 btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS; 00091 init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE, 00092 btype_vlc_bits[i], 1, 1, 00093 btype_vlc_codes[i], 1, 1, 00094 btype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); 00095 } 00096 } 00097 00104 static int get_dimension(GetBitContext *gb, const int *dim) 00105 { 00106 int t = get_bits(gb, 3); 00107 int val = dim[t]; 00108 if(val < 0) 00109 val = dim[get_bits1(gb) - val]; 00110 if(!val){ 00111 do{ 00112 t = get_bits(gb, 8); 00113 val += t << 2; 00114 }while(t == 0xFF); 00115 } 00116 return val; 00117 } 00118 00122 static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h) 00123 { 00124 *w = get_dimension(gb, rv40_standard_widths); 00125 *h = get_dimension(gb, rv40_standard_heights); 00126 } 00127 00128 static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si) 00129 { 00130 int mb_bits; 00131 int w = r->s.width, h = r->s.height; 00132 int mb_size; 00133 00134 memset(si, 0, sizeof(SliceInfo)); 00135 if(get_bits1(gb)) 00136 return -1; 00137 si->type = get_bits(gb, 2); 00138 if(si->type == 1) si->type = 0; 00139 si->quant = get_bits(gb, 5); 00140 if(get_bits(gb, 2)) 00141 return -1; 00142 si->vlc_set = get_bits(gb, 2); 00143 skip_bits1(gb); 00144 si->pts = get_bits(gb, 13); 00145 if(!si->type || !get_bits1(gb)) 00146 rv40_parse_picture_size(gb, &w, &h); 00147 if(av_image_check_size(w, h, 0, r->s.avctx) < 0) 00148 return -1; 00149 si->width = w; 00150 si->height = h; 00151 mb_size = ((w + 15) >> 4) * ((h + 15) >> 4); 00152 mb_bits = ff_rv34_get_start_offset(gb, mb_size); 00153 si->start = get_bits(gb, mb_bits); 00154 00155 return 0; 00156 } 00157 00161 static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst) 00162 { 00163 MpegEncContext *s = &r->s; 00164 int i, j, k, v; 00165 int A, B, C; 00166 int pattern; 00167 int8_t *ptr; 00168 00169 for(i = 0; i < 4; i++, dst += r->intra_types_stride){ 00170 if(!i && s->first_slice_line){ 00171 pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1); 00172 dst[0] = (pattern >> 2) & 2; 00173 dst[1] = (pattern >> 1) & 2; 00174 dst[2] = pattern & 2; 00175 dst[3] = (pattern << 1) & 2; 00176 continue; 00177 } 00178 ptr = dst; 00179 for(j = 0; j < 4; j++){ 00180 /* Coefficients are read using VLC chosen by the prediction pattern 00181 * The first one (used for retrieving a pair of coefficients) is 00182 * constructed from the top, top right and left coefficients 00183 * The second one (used for retrieving only one coefficient) is 00184 * top + 10 * left. 00185 */ 00186 A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row 00187 B = ptr[-r->intra_types_stride]; 00188 C = ptr[-1]; 00189 pattern = A + (B << 4) + (C << 8); 00190 for(k = 0; k < MODE2_PATTERNS_NUM; k++) 00191 if(pattern == rv40_aic_table_index[k]) 00192 break; 00193 if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients 00194 v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2); 00195 *ptr++ = v/9; 00196 *ptr++ = v%9; 00197 j++; 00198 }else{ 00199 if(B != -1 && C != -1) 00200 v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1); 00201 else{ // tricky decoding 00202 v = 0; 00203 switch(C){ 00204 case -1: // code 0 -> 1, 1 -> 0 00205 if(B < 2) 00206 v = get_bits1(gb) ^ 1; 00207 break; 00208 case 0: 00209 case 2: // code 0 -> 2, 1 -> 0 00210 v = (get_bits1(gb) ^ 1) << 1; 00211 break; 00212 } 00213 } 00214 *ptr++ = v; 00215 } 00216 } 00217 } 00218 return 0; 00219 } 00220 00224 static int rv40_decode_mb_info(RV34DecContext *r) 00225 { 00226 MpegEncContext *s = &r->s; 00227 GetBitContext *gb = &s->gb; 00228 int q, i; 00229 int prev_type = 0; 00230 int mb_pos = s->mb_x + s->mb_y * s->mb_stride; 00231 int blocks[RV34_MB_TYPES] = {0}; 00232 int count = 0; 00233 00234 if(!r->s.mb_skip_run) 00235 r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1; 00236 00237 if(--r->s.mb_skip_run) 00238 return RV34_MB_SKIP; 00239 00240 if(r->avail_cache[6-1]) 00241 blocks[r->mb_type[mb_pos - 1]]++; 00242 if(r->avail_cache[6-4]){ 00243 blocks[r->mb_type[mb_pos - s->mb_stride]]++; 00244 if(r->avail_cache[6-2]) 00245 blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; 00246 if(r->avail_cache[6-5]) 00247 blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++; 00248 } 00249 00250 for(i = 0; i < RV34_MB_TYPES; i++){ 00251 if(blocks[i] > count){ 00252 count = blocks[i]; 00253 prev_type = i; 00254 } 00255 } 00256 if(s->pict_type == AV_PICTURE_TYPE_P){ 00257 prev_type = block_num_to_ptype_vlc_num[prev_type]; 00258 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); 00259 if(q < PBTYPE_ESCAPE) 00260 return q; 00261 q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); 00262 av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n"); 00263 }else{ 00264 prev_type = block_num_to_btype_vlc_num[prev_type]; 00265 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); 00266 if(q < PBTYPE_ESCAPE) 00267 return q; 00268 q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); 00269 av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); 00270 } 00271 return 0; 00272 } 00273 00274 #define CLIP_SYMM(a, b) av_clip(a, -(b), b) 00275 00278 static inline void rv40_weak_loop_filter(uint8_t *src, const int step, 00279 const int filter_p1, const int filter_q1, 00280 const int alpha, const int beta, 00281 const int lim_p0q0, 00282 const int lim_q1, const int lim_p1, 00283 const int diff_p1p0, const int diff_q1q0, 00284 const int diff_p1p2, const int diff_q1q2) 00285 { 00286 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; 00287 int t, u, diff; 00288 00289 t = src[0*step] - src[-1*step]; 00290 if(!t) 00291 return; 00292 u = (alpha * FFABS(t)) >> 7; 00293 if(u > 3 - (filter_p1 && filter_q1)) 00294 return; 00295 00296 t <<= 2; 00297 if(filter_p1 && filter_q1) 00298 t += src[-2*step] - src[1*step]; 00299 diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0); 00300 src[-1*step] = cm[src[-1*step] + diff]; 00301 src[ 0*step] = cm[src[ 0*step] - diff]; 00302 if(FFABS(diff_p1p2) <= beta && filter_p1){ 00303 t = (diff_p1p0 + diff_p1p2 - diff) >> 1; 00304 src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)]; 00305 } 00306 if(FFABS(diff_q1q2) <= beta && filter_q1){ 00307 t = (diff_q1q0 + diff_q1q2 + diff) >> 1; 00308 src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)]; 00309 } 00310 } 00311 00312 static av_always_inline void rv40_adaptive_loop_filter(uint8_t *src, const int step, 00313 const int stride, const int dmode, 00314 const int lim_q1, const int lim_p1, 00315 const int alpha, 00316 const int beta, const int beta2, 00317 const int chroma, const int edge) 00318 { 00319 int diff_p1p0[4], diff_q1q0[4], diff_p1p2[4], diff_q1q2[4]; 00320 int sum_p1p0 = 0, sum_q1q0 = 0, sum_p1p2 = 0, sum_q1q2 = 0; 00321 uint8_t *ptr; 00322 int flag_strong0 = 1, flag_strong1 = 1; 00323 int filter_p1, filter_q1; 00324 int i; 00325 int lims; 00326 00327 for(i = 0, ptr = src; i < 4; i++, ptr += stride){ 00328 diff_p1p0[i] = ptr[-2*step] - ptr[-1*step]; 00329 diff_q1q0[i] = ptr[ 1*step] - ptr[ 0*step]; 00330 sum_p1p0 += diff_p1p0[i]; 00331 sum_q1q0 += diff_q1q0[i]; 00332 } 00333 filter_p1 = FFABS(sum_p1p0) < (beta<<2); 00334 filter_q1 = FFABS(sum_q1q0) < (beta<<2); 00335 if(!filter_p1 && !filter_q1) 00336 return; 00337 00338 for(i = 0, ptr = src; i < 4; i++, ptr += stride){ 00339 diff_p1p2[i] = ptr[-2*step] - ptr[-3*step]; 00340 diff_q1q2[i] = ptr[ 1*step] - ptr[ 2*step]; 00341 sum_p1p2 += diff_p1p2[i]; 00342 sum_q1q2 += diff_q1q2[i]; 00343 } 00344 00345 if(edge){ 00346 flag_strong0 = filter_p1 && (FFABS(sum_p1p2) < beta2); 00347 flag_strong1 = filter_q1 && (FFABS(sum_q1q2) < beta2); 00348 }else{ 00349 flag_strong0 = flag_strong1 = 0; 00350 } 00351 00352 lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; 00353 if(flag_strong0 && flag_strong1){ /* strong filtering */ 00354 for(i = 0; i < 4; i++, src += stride){ 00355 int sflag, p0, q0, p1, q1; 00356 int t = src[0*step] - src[-1*step]; 00357 00358 if(!t) continue; 00359 sflag = (alpha * FFABS(t)) >> 7; 00360 if(sflag > 1) continue; 00361 00362 p0 = (25*src[-3*step] + 26*src[-2*step] 00363 + 26*src[-1*step] 00364 + 26*src[ 0*step] + 25*src[ 1*step] + rv40_dither_l[dmode + i]) >> 7; 00365 q0 = (25*src[-2*step] + 26*src[-1*step] 00366 + 26*src[ 0*step] 00367 + 26*src[ 1*step] + 25*src[ 2*step] + rv40_dither_r[dmode + i]) >> 7; 00368 if(sflag){ 00369 p0 = av_clip(p0, src[-1*step] - lims, src[-1*step] + lims); 00370 q0 = av_clip(q0, src[ 0*step] - lims, src[ 0*step] + lims); 00371 } 00372 p1 = (25*src[-4*step] + 26*src[-3*step] 00373 + 26*src[-2*step] 00374 + 26*p0 + 25*src[ 0*step] + rv40_dither_l[dmode + i]) >> 7; 00375 q1 = (25*src[-1*step] + 26*q0 00376 + 26*src[ 1*step] 00377 + 26*src[ 2*step] + 25*src[ 3*step] + rv40_dither_r[dmode + i]) >> 7; 00378 if(sflag){ 00379 p1 = av_clip(p1, src[-2*step] - lims, src[-2*step] + lims); 00380 q1 = av_clip(q1, src[ 1*step] - lims, src[ 1*step] + lims); 00381 } 00382 src[-2*step] = p1; 00383 src[-1*step] = p0; 00384 src[ 0*step] = q0; 00385 src[ 1*step] = q1; 00386 if(!chroma){ 00387 src[-3*step] = (25*src[-1*step] + 26*src[-2*step] + 51*src[-3*step] + 26*src[-4*step] + 64) >> 7; 00388 src[ 2*step] = (25*src[ 0*step] + 26*src[ 1*step] + 51*src[ 2*step] + 26*src[ 3*step] + 64) >> 7; 00389 } 00390 } 00391 }else if(filter_p1 && filter_q1){ 00392 for(i = 0; i < 4; i++, src += stride) 00393 rv40_weak_loop_filter(src, step, 1, 1, alpha, beta, lims, lim_q1, lim_p1, 00394 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); 00395 }else{ 00396 for(i = 0; i < 4; i++, src += stride) 00397 rv40_weak_loop_filter(src, step, filter_p1, filter_q1, 00398 alpha, beta, lims>>1, lim_q1>>1, lim_p1>>1, 00399 diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); 00400 } 00401 } 00402 00403 static void rv40_v_loop_filter(uint8_t *src, int stride, int dmode, 00404 int lim_q1, int lim_p1, 00405 int alpha, int beta, int beta2, int chroma, int edge){ 00406 rv40_adaptive_loop_filter(src, 1, stride, dmode, lim_q1, lim_p1, 00407 alpha, beta, beta2, chroma, edge); 00408 } 00409 static void rv40_h_loop_filter(uint8_t *src, int stride, int dmode, 00410 int lim_q1, int lim_p1, 00411 int alpha, int beta, int beta2, int chroma, int edge){ 00412 rv40_adaptive_loop_filter(src, stride, 1, dmode, lim_q1, lim_p1, 00413 alpha, beta, beta2, chroma, edge); 00414 } 00415 00416 enum RV40BlockPos{ 00417 POS_CUR, 00418 POS_TOP, 00419 POS_LEFT, 00420 POS_BOTTOM, 00421 }; 00422 00423 #define MASK_CUR 0x0001 00424 #define MASK_RIGHT 0x0008 00425 #define MASK_BOTTOM 0x0010 00426 #define MASK_TOP 0x1000 00427 #define MASK_Y_TOP_ROW 0x000F 00428 #define MASK_Y_LAST_ROW 0xF000 00429 #define MASK_Y_LEFT_COL 0x1111 00430 #define MASK_Y_RIGHT_COL 0x8888 00431 #define MASK_C_TOP_ROW 0x0003 00432 #define MASK_C_LAST_ROW 0x000C 00433 #define MASK_C_LEFT_COL 0x0005 00434 #define MASK_C_RIGHT_COL 0x000A 00435 00436 static const int neighbour_offs_x[4] = { 0, 0, -1, 0 }; 00437 static const int neighbour_offs_y[4] = { 0, -1, 0, 1 }; 00438 00442 static void rv40_loop_filter(RV34DecContext *r, int row) 00443 { 00444 MpegEncContext *s = &r->s; 00445 int mb_pos, mb_x; 00446 int i, j, k; 00447 uint8_t *Y, *C; 00448 int alpha, beta, betaY, betaC; 00449 int q; 00450 int mbtype[4]; 00451 00455 int mb_strong[4]; 00456 int clip[4]; 00457 00463 int cbp[4]; 00468 int uvcbp[4][2]; 00474 int mvmasks[4]; 00475 00476 mb_pos = row * s->mb_stride; 00477 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ 00478 int mbtype = s->current_picture_ptr->mb_type[mb_pos]; 00479 if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype)) 00480 r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF; 00481 if(IS_INTRA(mbtype)) 00482 r->cbp_chroma[mb_pos] = 0xFF; 00483 } 00484 mb_pos = row * s->mb_stride; 00485 for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ 00486 int y_h_deblock, y_v_deblock; 00487 int c_v_deblock[2], c_h_deblock[2]; 00488 int clip_left; 00489 int avail[4]; 00490 int y_to_deblock, c_to_deblock[2]; 00491 00492 q = s->current_picture_ptr->qscale_table[mb_pos]; 00493 alpha = rv40_alpha_tab[q]; 00494 beta = rv40_beta_tab [q]; 00495 betaY = betaC = beta * 3; 00496 if(s->width * s->height <= 176*144) 00497 betaY += beta; 00498 00499 avail[0] = 1; 00500 avail[1] = row; 00501 avail[2] = mb_x; 00502 avail[3] = row < s->mb_height - 1; 00503 for(i = 0; i < 4; i++){ 00504 if(avail[i]){ 00505 int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride; 00506 mvmasks[i] = r->deblock_coefs[pos]; 00507 mbtype [i] = s->current_picture_ptr->mb_type[pos]; 00508 cbp [i] = r->cbp_luma[pos]; 00509 uvcbp[i][0] = r->cbp_chroma[pos] & 0xF; 00510 uvcbp[i][1] = r->cbp_chroma[pos] >> 4; 00511 }else{ 00512 mvmasks[i] = 0; 00513 mbtype [i] = mbtype[0]; 00514 cbp [i] = 0; 00515 uvcbp[i][0] = uvcbp[i][1] = 0; 00516 } 00517 mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]); 00518 clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q]; 00519 } 00520 y_to_deblock = mvmasks[POS_CUR] 00521 | (mvmasks[POS_BOTTOM] << 16); 00522 /* This pattern contains bits signalling that horizontal edges of 00523 * the current block can be filtered. 00524 * That happens when either of adjacent subblocks is coded or lies on 00525 * the edge of 8x8 blocks with motion vectors differing by more than 00526 * 3/4 pel in any component (any edge orientation for some reason). 00527 */ 00528 y_h_deblock = y_to_deblock 00529 | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW) 00530 | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12); 00531 /* This pattern contains bits signalling that vertical edges of 00532 * the current block can be filtered. 00533 * That happens when either of adjacent subblocks is coded or lies on 00534 * the edge of 8x8 blocks with motion vectors differing by more than 00535 * 3/4 pel in any component (any edge orientation for some reason). 00536 */ 00537 y_v_deblock = y_to_deblock 00538 | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL) 00539 | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3); 00540 if(!mb_x) 00541 y_v_deblock &= ~MASK_Y_LEFT_COL; 00542 if(!row) 00543 y_h_deblock &= ~MASK_Y_TOP_ROW; 00544 if(row == s->mb_height - 1 || (mb_strong[POS_CUR] || mb_strong[POS_BOTTOM])) 00545 y_h_deblock &= ~(MASK_Y_TOP_ROW << 16); 00546 /* Calculating chroma patterns is similar and easier since there is 00547 * no motion vector pattern for them. 00548 */ 00549 for(i = 0; i < 2; i++){ 00550 c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i]; 00551 c_v_deblock[i] = c_to_deblock[i] 00552 | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL) 00553 | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1); 00554 c_h_deblock[i] = c_to_deblock[i] 00555 | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2) 00556 | (uvcbp[POS_CUR][i] << 2); 00557 if(!mb_x) 00558 c_v_deblock[i] &= ~MASK_C_LEFT_COL; 00559 if(!row) 00560 c_h_deblock[i] &= ~MASK_C_TOP_ROW; 00561 if(row == s->mb_height - 1 || mb_strong[POS_CUR] || mb_strong[POS_BOTTOM]) 00562 c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4); 00563 } 00564 00565 for(j = 0; j < 16; j += 4){ 00566 Y = s->current_picture_ptr->data[0] + mb_x*16 + (row*16 + j) * s->linesize; 00567 for(i = 0; i < 4; i++, Y += 4){ 00568 int ij = i + j; 00569 int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0; 00570 int dither = j ? ij : i*4; 00571 00572 // if bottom block is coded then we can filter its top edge 00573 // (or bottom edge of this block, which is the same) 00574 if(y_h_deblock & (MASK_BOTTOM << ij)){ 00575 rv40_h_loop_filter(Y+4*s->linesize, s->linesize, dither, 00576 y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0, 00577 clip_cur, 00578 alpha, beta, betaY, 0, 0); 00579 } 00580 // filter left block edge in ordinary mode (with low filtering strength) 00581 if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){ 00582 if(!i) 00583 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; 00584 else 00585 clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; 00586 rv40_v_loop_filter(Y, s->linesize, dither, 00587 clip_cur, 00588 clip_left, 00589 alpha, beta, betaY, 0, 0); 00590 } 00591 // filter top edge of the current macroblock when filtering strength is high 00592 if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){ 00593 rv40_h_loop_filter(Y, s->linesize, dither, 00594 clip_cur, 00595 mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0, 00596 alpha, beta, betaY, 0, 1); 00597 } 00598 // filter left block edge in edge mode (with high filtering strength) 00599 if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){ 00600 clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; 00601 rv40_v_loop_filter(Y, s->linesize, dither, 00602 clip_cur, 00603 clip_left, 00604 alpha, beta, betaY, 0, 1); 00605 } 00606 } 00607 } 00608 for(k = 0; k < 2; k++){ 00609 for(j = 0; j < 2; j++){ 00610 C = s->current_picture_ptr->data[k+1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize; 00611 for(i = 0; i < 2; i++, C += 4){ 00612 int ij = i + j*2; 00613 int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0; 00614 if(c_h_deblock[k] & (MASK_CUR << (ij+2))){ 00615 int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0; 00616 rv40_h_loop_filter(C+4*s->uvlinesize, s->uvlinesize, i*8, 00617 clip_bot, 00618 clip_cur, 00619 alpha, beta, betaC, 1, 0); 00620 } 00621 if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] || mb_strong[POS_LEFT]))){ 00622 if(!i) 00623 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; 00624 else 00625 clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; 00626 rv40_v_loop_filter(C, s->uvlinesize, j*8, 00627 clip_cur, 00628 clip_left, 00629 alpha, beta, betaC, 1, 0); 00630 } 00631 if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] || mb_strong[POS_TOP])){ 00632 int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0; 00633 rv40_h_loop_filter(C, s->uvlinesize, i*8, 00634 clip_cur, 00635 clip_top, 00636 alpha, beta, betaC, 1, 1); 00637 } 00638 if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] || mb_strong[POS_LEFT])){ 00639 clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; 00640 rv40_v_loop_filter(C, s->uvlinesize, j*8, 00641 clip_cur, 00642 clip_left, 00643 alpha, beta, betaC, 1, 1); 00644 } 00645 } 00646 } 00647 } 00648 } 00649 } 00650 00654 static av_cold int rv40_decode_init(AVCodecContext *avctx) 00655 { 00656 RV34DecContext *r = avctx->priv_data; 00657 00658 r->rv30 = 0; 00659 ff_rv34_decode_init(avctx); 00660 if(!aic_top_vlc.bits) 00661 rv40_init_tables(); 00662 r->parse_slice_header = rv40_parse_slice_header; 00663 r->decode_intra_types = rv40_decode_intra_types; 00664 r->decode_mb_info = rv40_decode_mb_info; 00665 r->loop_filter = rv40_loop_filter; 00666 r->luma_dc_quant_i = rv40_luma_dc_quant[0]; 00667 r->luma_dc_quant_p = rv40_luma_dc_quant[1]; 00668 return 0; 00669 } 00670 00671 AVCodec ff_rv40_decoder = { 00672 "rv40", 00673 AVMEDIA_TYPE_VIDEO, 00674 CODEC_ID_RV40, 00675 sizeof(RV34DecContext), 00676 rv40_decode_init, 00677 NULL, 00678 ff_rv34_decode_end, 00679 ff_rv34_decode_frame, 00680 CODEC_CAP_DR1 | CODEC_CAP_DELAY, 00681 .flush = ff_mpeg_flush, 00682 .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"), 00683 .pix_fmts= ff_pixfmt_list_420, 00684 };