| /* | |
| * RV40 decoder | |
| * Copyright (c) 2007 Konstantin Shishkov | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * RV40 decoder | |
| */ | |
| #include "config.h" | |
| #include "libavutil/imgutils.h" | |
| #include "libavutil/thread.h" | |
| #include "avcodec.h" | |
| #include "codec_internal.h" | |
| #include "mpegutils.h" | |
| #include "mpegvideo.h" | |
| #include "mpegvideodec.h" | |
| #include "golomb.h" | |
| #include "rv34.h" | |
| #include "rv40vlc2.h" | |
| #include "rv40data.h" | |
| static VLCElem aic_top_vlc[23590]; | |
| static const VLCElem *aic_mode1_vlc[AIC_MODE1_NUM], *aic_mode2_vlc[AIC_MODE2_NUM]; | |
| static const VLCElem *ptype_vlc[NUM_PTYPE_VLCS], *btype_vlc[NUM_BTYPE_VLCS]; | |
| static av_cold const VLCElem *rv40_init_table(VLCInitState *state, int nb_bits, | |
| int nb_codes, const uint8_t (*tab)[2]) | |
| { | |
| return ff_vlc_init_tables_from_lengths(state, nb_bits, nb_codes, | |
| &tab[0][1], 2, &tab[0][0], 2, 1, | |
| 0, 0); | |
| } | |
| /** | |
| * Initialize all tables. | |
| */ | |
| static av_cold void rv40_init_tables(void) | |
| { | |
| VLCInitState state = VLC_INIT_STATE(aic_top_vlc); | |
| int i; | |
| rv40_init_table(&state, AIC_TOP_BITS, AIC_TOP_SIZE, | |
| rv40_aic_top_vlc_tab); | |
| for(i = 0; i < AIC_MODE1_NUM; i++){ | |
| // Every tenth VLC table is empty | |
| if((i % 10) == 9) continue; | |
| aic_mode1_vlc[i] = | |
| rv40_init_table(&state, AIC_MODE1_BITS, | |
| AIC_MODE1_SIZE, aic_mode1_vlc_tabs[i]); | |
| } | |
| for (unsigned i = 0; i < AIC_MODE2_NUM; i++){ | |
| uint16_t syms[AIC_MODE2_SIZE]; | |
| for (int j = 0; j < AIC_MODE2_SIZE; j++) { | |
| int first = aic_mode2_vlc_syms[i][j] >> 4; | |
| int second = aic_mode2_vlc_syms[i][j] & 0xF; | |
| if (HAVE_BIGENDIAN) | |
| syms[j] = (first << 8) | second; | |
| else | |
| syms[j] = first | (second << 8); | |
| } | |
| aic_mode2_vlc[i] = | |
| ff_vlc_init_tables_from_lengths(&state, AIC_MODE2_BITS, AIC_MODE2_SIZE, | |
| aic_mode2_vlc_bits[i], 1, | |
| syms, 2, 2, 0, 0); | |
| } | |
| for(i = 0; i < NUM_PTYPE_VLCS; i++){ | |
| ptype_vlc[i] = | |
| rv40_init_table(&state, PTYPE_VLC_BITS, PTYPE_VLC_SIZE, | |
| ptype_vlc_tabs[i]); | |
| } | |
| for(i = 0; i < NUM_BTYPE_VLCS; i++){ | |
| btype_vlc[i] = | |
| rv40_init_table(&state, BTYPE_VLC_BITS, BTYPE_VLC_SIZE, | |
| btype_vlc_tabs[i]); | |
| } | |
| } | |
| /** | |
| * Get stored dimension from bitstream. | |
| * | |
| * If the width/height is the standard one then it's coded as a 3-bit index. | |
| * Otherwise it is coded as escaped 8-bit portions. | |
| */ | |
| static int get_dimension(GetBitContext *gb, const int *dim) | |
| { | |
| int t = get_bits(gb, 3); | |
| int val = dim[t]; | |
| if(val < 0) | |
| val = dim[get_bits1(gb) - val]; | |
| if(!val){ | |
| do{ | |
| if (get_bits_left(gb) < 8) | |
| return AVERROR_INVALIDDATA; | |
| t = get_bits(gb, 8); | |
| val += t << 2; | |
| }while(t == 0xFF); | |
| } | |
| return val; | |
| } | |
| /** | |
| * Get encoded picture size - usually this is called from rv40_parse_slice_header. | |
| */ | |
| static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h) | |
| { | |
| *w = get_dimension(gb, rv40_standard_widths); | |
| *h = get_dimension(gb, rv40_standard_heights); | |
| } | |
| static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si) | |
| { | |
| int mb_bits; | |
| int w = r->s.width, h = r->s.height; | |
| int mb_size; | |
| int ret; | |
| memset(si, 0, sizeof(SliceInfo)); | |
| if(get_bits1(gb)) | |
| return AVERROR_INVALIDDATA; | |
| si->type = get_bits(gb, 2); | |
| if(si->type == 1) si->type = 0; | |
| si->quant = get_bits(gb, 5); | |
| if(get_bits(gb, 2)) | |
| return AVERROR_INVALIDDATA; | |
| si->vlc_set = get_bits(gb, 2); | |
| skip_bits1(gb); | |
| si->pts = get_bits(gb, 13); | |
| if(!si->type || !get_bits1(gb)) | |
| rv40_parse_picture_size(gb, &w, &h); | |
| if ((ret = av_image_check_size(w, h, 0, r->s.avctx)) < 0) | |
| return ret; | |
| si->width = w; | |
| si->height = h; | |
| mb_size = ((w + 15) >> 4) * ((h + 15) >> 4); | |
| mb_bits = ff_rv34_get_start_offset(gb, mb_size); | |
| si->start = get_bits(gb, mb_bits); | |
| return 0; | |
| } | |
| /** | |
| * Decode 4x4 intra types array. | |
| */ | |
| static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst) | |
| { | |
| MpegEncContext *s = &r->s; | |
| int i, j, k, v; | |
| int A, B, C; | |
| int pattern; | |
| int8_t *ptr; | |
| for(i = 0; i < 4; i++, dst += r->intra_types_stride){ | |
| if(!i && s->first_slice_line){ | |
| pattern = get_vlc2(gb, aic_top_vlc, AIC_TOP_BITS, 1); | |
| dst[0] = (pattern >> 2) & 2; | |
| dst[1] = (pattern >> 1) & 2; | |
| dst[2] = pattern & 2; | |
| dst[3] = (pattern << 1) & 2; | |
| continue; | |
| } | |
| ptr = dst; | |
| for(j = 0; j < 4; j++){ | |
| /* Coefficients are read using VLC chosen by the prediction pattern | |
| * The first one (used for retrieving a pair of coefficients) is | |
| * constructed from the top, top right and left coefficients | |
| * The second one (used for retrieving only one coefficient) is | |
| * top + 10 * left. | |
| */ | |
| A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row | |
| B = ptr[-r->intra_types_stride]; | |
| C = ptr[-1]; | |
| pattern = A + B * (1 << 4) + C * (1 << 8); | |
| for(k = 0; k < MODE2_PATTERNS_NUM; k++) | |
| if(pattern == rv40_aic_table_index[k]) | |
| break; | |
| if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients | |
| AV_WN16(ptr, get_vlc2(gb, aic_mode2_vlc[k], AIC_MODE2_BITS, 2)); | |
| ptr += 2; | |
| j++; | |
| }else{ | |
| if(B != -1 && C != -1) | |
| v = get_vlc2(gb, aic_mode1_vlc[B + C*10], AIC_MODE1_BITS, 1); | |
| else{ // tricky decoding | |
| v = 0; | |
| switch(C){ | |
| case -1: // code 0 -> 1, 1 -> 0 | |
| if(B < 2) | |
| v = get_bits1(gb) ^ 1; | |
| break; | |
| case 0: | |
| case 2: // code 0 -> 2, 1 -> 0 | |
| v = (get_bits1(gb) ^ 1) << 1; | |
| break; | |
| } | |
| } | |
| *ptr++ = v; | |
| } | |
| } | |
| } | |
| return 0; | |
| } | |
| /** | |
| * Decode macroblock information. | |
| */ | |
| static int rv40_decode_mb_info(RV34DecContext *r) | |
| { | |
| MpegEncContext *s = &r->s; | |
| GetBitContext *gb = &s->gb; | |
| int q, i; | |
| int prev_type = 0; | |
| int mb_pos = s->mb_x + s->mb_y * s->mb_stride; | |
| if(!r->s.mb_skip_run) { | |
| r->s.mb_skip_run = get_interleaved_ue_golomb(gb) + 1; | |
| if(r->s.mb_skip_run > (unsigned)s->mb_num) | |
| return -1; | |
| } | |
| if(--r->s.mb_skip_run) | |
| return RV34_MB_SKIP; | |
| if(r->avail_cache[6-4]){ | |
| int blocks[RV34_MB_TYPES] = {0}; | |
| int count = 0; | |
| if(r->avail_cache[6-1]) | |
| blocks[r->mb_type[mb_pos - 1]]++; | |
| blocks[r->mb_type[mb_pos - s->mb_stride]]++; | |
| if(r->avail_cache[6-2]) | |
| blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; | |
| if(r->avail_cache[6-5]) | |
| blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++; | |
| for(i = 0; i < RV34_MB_TYPES; i++){ | |
| if(blocks[i] > count){ | |
| count = blocks[i]; | |
| prev_type = i; | |
| if(count>1) | |
| break; | |
| } | |
| } | |
| } else if (r->avail_cache[6-1]) | |
| prev_type = r->mb_type[mb_pos - 1]; | |
| if(s->pict_type == AV_PICTURE_TYPE_P){ | |
| prev_type = block_num_to_ptype_vlc_num[prev_type]; | |
| q = get_vlc2(gb, ptype_vlc[prev_type], PTYPE_VLC_BITS, 1); | |
| if(q < PBTYPE_ESCAPE) | |
| return q; | |
| q = get_vlc2(gb, ptype_vlc[prev_type], PTYPE_VLC_BITS, 1); | |
| av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n"); | |
| }else{ | |
| prev_type = block_num_to_btype_vlc_num[prev_type]; | |
| q = get_vlc2(gb, btype_vlc[prev_type], BTYPE_VLC_BITS, 1); | |
| if(q < PBTYPE_ESCAPE) | |
| return q; | |
| q = get_vlc2(gb, btype_vlc[prev_type], BTYPE_VLC_BITS, 1); | |
| av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); | |
| } | |
| return 0; | |
| } | |
| enum RV40BlockPos{ | |
| POS_CUR, | |
| POS_TOP, | |
| POS_LEFT, | |
| POS_BOTTOM, | |
| }; | |
| #define MASK_CUR 0x0001 | |
| #define MASK_RIGHT 0x0008 | |
| #define MASK_BOTTOM 0x0010 | |
| #define MASK_TOP 0x1000 | |
| #define MASK_Y_TOP_ROW 0x000F | |
| #define MASK_Y_LAST_ROW 0xF000 | |
| #define MASK_Y_LEFT_COL 0x1111 | |
| #define MASK_Y_RIGHT_COL 0x8888 | |
| #define MASK_C_TOP_ROW 0x0003 | |
| #define MASK_C_LAST_ROW 0x000C | |
| #define MASK_C_LEFT_COL 0x0005 | |
| #define MASK_C_RIGHT_COL 0x000A | |
| static const int neighbour_offs_x[4] = { 0, 0, -1, 0 }; | |
| static const int neighbour_offs_y[4] = { 0, -1, 0, 1 }; | |
| static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp, | |
| uint8_t *src, int stride, int dmode, | |
| int lim_q1, int lim_p1, | |
| int alpha, int beta, int beta2, | |
| int chroma, int edge, int dir) | |
| { | |
| int filter_p1, filter_q1; | |
| int strong; | |
| int lims; | |
| strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2, | |
| edge, &filter_p1, &filter_q1); | |
| lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; | |
| if (strong) { | |
| rdsp->rv40_strong_loop_filter[dir](src, stride, alpha, | |
| lims, dmode, chroma); | |
| } else if (filter_p1 & filter_q1) { | |
| rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta, | |
| lims, lim_q1, lim_p1); | |
| } else if (filter_p1 | filter_q1) { | |
| rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1, | |
| alpha, beta, lims >> 1, lim_q1 >> 1, | |
| lim_p1 >> 1); | |
| } | |
| } | |
| /** | |
| * RV40 loop filtering function | |
| */ | |
| static void rv40_loop_filter(RV34DecContext *r, int row) | |
| { | |
| MpegEncContext *s = &r->s; | |
| int mb_pos, mb_x; | |
| int i, j, k; | |
| uint8_t *Y, *C; | |
| int alpha, beta, betaY, betaC; | |
| int q; | |
| int mbtype[4]; ///< current macroblock and its neighbours types | |
| /** | |
| * flags indicating that macroblock can be filtered with strong filter | |
| * it is set only for intra coded MB and MB with DCs coded separately | |
| */ | |
| int mb_strong[4]; | |
| int clip[4]; ///< MB filter clipping value calculated from filtering strength | |
| /** | |
| * coded block patterns for luma part of current macroblock and its neighbours | |
| * Format: | |
| * LSB corresponds to the top left block, | |
| * each nibble represents one row of subblocks. | |
| */ | |
| int cbp[4]; | |
| /** | |
| * coded block patterns for chroma part of current macroblock and its neighbours | |
| * Format is the same as for luma with two subblocks in a row. | |
| */ | |
| int uvcbp[4][2]; | |
| /** | |
| * This mask represents the pattern of luma subblocks that should be filtered | |
| * in addition to the coded ones because they lie at the edge of | |
| * 8x8 block with different enough motion vectors | |
| */ | |
| unsigned mvmasks[4]; | |
| mb_pos = row * s->mb_stride; | |
| for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ | |
| int mbtype = s->current_picture_ptr->mb_type[mb_pos]; | |
| if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype)) | |
| r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF; | |
| if(IS_INTRA(mbtype)) | |
| r->cbp_chroma[mb_pos] = 0xFF; | |
| } | |
| mb_pos = row * s->mb_stride; | |
| for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ | |
| int y_h_deblock, y_v_deblock; | |
| int c_v_deblock[2], c_h_deblock[2]; | |
| int clip_left; | |
| int avail[4]; | |
| unsigned y_to_deblock; | |
| int c_to_deblock[2]; | |
| q = s->current_picture_ptr->qscale_table[mb_pos]; | |
| alpha = rv40_alpha_tab[q]; | |
| beta = rv40_beta_tab [q]; | |
| betaY = betaC = beta * 3; | |
| if(s->width * s->height <= 176*144) | |
| betaY += beta; | |
| avail[0] = 1; | |
| avail[1] = row; | |
| avail[2] = mb_x; | |
| avail[3] = row < s->mb_height - 1; | |
| for(i = 0; i < 4; i++){ | |
| if(avail[i]){ | |
| int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride; | |
| mvmasks[i] = r->deblock_coefs[pos]; | |
| mbtype [i] = s->current_picture_ptr->mb_type[pos]; | |
| cbp [i] = r->cbp_luma[pos]; | |
| uvcbp[i][0] = r->cbp_chroma[pos] & 0xF; | |
| uvcbp[i][1] = r->cbp_chroma[pos] >> 4; | |
| }else{ | |
| mvmasks[i] = 0; | |
| mbtype [i] = mbtype[0]; | |
| cbp [i] = 0; | |
| uvcbp[i][0] = uvcbp[i][1] = 0; | |
| } | |
| mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]); | |
| clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q]; | |
| } | |
| y_to_deblock = mvmasks[POS_CUR] | |
| | (mvmasks[POS_BOTTOM] << 16); | |
| /* This pattern contains bits signalling that horizontal edges of | |
| * the current block can be filtered. | |
| * That happens when either of adjacent subblocks is coded or lies on | |
| * the edge of 8x8 blocks with motion vectors differing by more than | |
| * 3/4 pel in any component (any edge orientation for some reason). | |
| */ | |
| y_h_deblock = y_to_deblock | |
| | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW) | |
| | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12); | |
| /* This pattern contains bits signalling that vertical edges of | |
| * the current block can be filtered. | |
| * That happens when either of adjacent subblocks is coded or lies on | |
| * the edge of 8x8 blocks with motion vectors differing by more than | |
| * 3/4 pel in any component (any edge orientation for some reason). | |
| */ | |
| y_v_deblock = y_to_deblock | |
| | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL) | |
| | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3); | |
| if(!mb_x) | |
| y_v_deblock &= ~MASK_Y_LEFT_COL; | |
| if(!row) | |
| y_h_deblock &= ~MASK_Y_TOP_ROW; | |
| if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM])) | |
| y_h_deblock &= ~(MASK_Y_TOP_ROW << 16); | |
| /* Calculating chroma patterns is similar and easier since there is | |
| * no motion vector pattern for them. | |
| */ | |
| for(i = 0; i < 2; i++){ | |
| c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i]; | |
| c_v_deblock[i] = c_to_deblock[i] | |
| | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL) | |
| | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1); | |
| c_h_deblock[i] = c_to_deblock[i] | |
| | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2) | |
| | (uvcbp[POS_CUR][i] << 2); | |
| if(!mb_x) | |
| c_v_deblock[i] &= ~MASK_C_LEFT_COL; | |
| if(!row) | |
| c_h_deblock[i] &= ~MASK_C_TOP_ROW; | |
| if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM])) | |
| c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4); | |
| } | |
| for(j = 0; j < 16; j += 4){ | |
| Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize; | |
| for(i = 0; i < 4; i++, Y += 4){ | |
| int ij = i + j; | |
| int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0; | |
| int dither = j ? ij : i*4; | |
| // if bottom block is coded then we can filter its top edge | |
| // (or bottom edge of this block, which is the same) | |
| if(y_h_deblock & (MASK_BOTTOM << ij)){ | |
| rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize, | |
| s->linesize, dither, | |
| y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0, | |
| clip_cur, alpha, beta, betaY, | |
| 0, 0, 0); | |
| } | |
| // filter left block edge in ordinary mode (with low filtering strength) | |
| if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){ | |
| if(!i) | |
| clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; | |
| else | |
| clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, | |
| clip_cur, | |
| clip_left, | |
| alpha, beta, betaY, 0, 0, 1); | |
| } | |
| // filter top edge of the current macroblock when filtering strength is high | |
| if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){ | |
| rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, | |
| clip_cur, | |
| mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0, | |
| alpha, beta, betaY, 0, 1, 0); | |
| } | |
| // filter left block edge in edge mode (with high filtering strength) | |
| if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){ | |
| clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, | |
| clip_cur, | |
| clip_left, | |
| alpha, beta, betaY, 0, 1, 1); | |
| } | |
| } | |
| } | |
| for(k = 0; k < 2; k++){ | |
| for(j = 0; j < 2; j++){ | |
| C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize; | |
| for(i = 0; i < 2; i++, C += 4){ | |
| int ij = i + j*2; | |
| int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0; | |
| if(c_h_deblock[k] & (MASK_CUR << (ij+2))){ | |
| int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8, | |
| clip_bot, | |
| clip_cur, | |
| alpha, beta, betaC, 1, 0, 0); | |
| } | |
| if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){ | |
| if(!i) | |
| clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; | |
| else | |
| clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8, | |
| clip_cur, | |
| clip_left, | |
| alpha, beta, betaC, 1, 0, 1); | |
| } | |
| if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){ | |
| int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8, | |
| clip_cur, | |
| clip_top, | |
| alpha, beta, betaC, 1, 1, 0); | |
| } | |
| if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){ | |
| clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; | |
| rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8, | |
| clip_cur, | |
| clip_left, | |
| alpha, beta, betaC, 1, 1, 1); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| /** | |
| * Initialize decoder. | |
| */ | |
| static av_cold int rv40_decode_init(AVCodecContext *avctx) | |
| { | |
| static AVOnce init_static_once = AV_ONCE_INIT; | |
| RV34DecContext *r = avctx->priv_data; | |
| int ret; | |
| r->rv30 = 0; | |
| if ((ret = ff_rv34_decode_init(avctx)) < 0) | |
| return ret; | |
| r->parse_slice_header = rv40_parse_slice_header; | |
| r->decode_intra_types = rv40_decode_intra_types; | |
| r->decode_mb_info = rv40_decode_mb_info; | |
| r->loop_filter = rv40_loop_filter; | |
| r->luma_dc_quant_i = rv40_luma_dc_quant[0]; | |
| r->luma_dc_quant_p = rv40_luma_dc_quant[1]; | |
| ff_rv40dsp_init(&r->rdsp); | |
| ff_thread_once(&init_static_once, rv40_init_tables); | |
| return 0; | |
| } | |
| const FFCodec ff_rv40_decoder = { | |
| .p.name = "rv40", | |
| CODEC_LONG_NAME("RealVideo 4.0"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_RV40, | |
| .priv_data_size = sizeof(RV34DecContext), | |
| .init = rv40_decode_init, | |
| .close = ff_rv34_decode_end, | |
| FF_CODEC_DECODE_CB(ff_rv34_decode_frame), | |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | | |
| AV_CODEC_CAP_FRAME_THREADS, | |
| .flush = ff_mpeg_flush, | |
| UPDATE_THREAD_CONTEXT(ff_rv34_decode_update_thread_context), | |
| .caps_internal = FF_CODEC_CAP_ALLOCATE_PROGRESS, | |
| }; |