| /* |
| * 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 libavcodec/rv40.c |
| * RV40 decoder |
| */ |
| |
| #include "avcodec.h" |
| #include "dsputil.h" |
| #include "mpegvideo.h" |
| #include "golomb.h" |
| |
| #include "rv34.h" |
| #include "rv40vlc2.h" |
| #include "rv40data.h" |
| |
| static VLC aic_top_vlc; |
| static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM]; |
| static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS]; |
| |
| /** |
| * Initialize all tables. |
| */ |
| static av_cold void rv40_init_tables(void) |
| { |
| int i; |
| |
| init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE, |
| rv40_aic_top_vlc_bits, 1, 1, |
| rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_STATIC); |
| for(i = 0; i < AIC_MODE1_NUM; i++){ |
| // Every tenth VLC table is empty |
| if((i % 10) == 9) continue; |
| init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE, |
| aic_mode1_vlc_bits[i], 1, 1, |
| aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_STATIC); |
| } |
| for(i = 0; i < AIC_MODE2_NUM; i++){ |
| init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE, |
| aic_mode2_vlc_bits[i], 1, 1, |
| aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_STATIC); |
| } |
| for(i = 0; i < NUM_PTYPE_VLCS; i++) |
| init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE, |
| ptype_vlc_bits[i], 1, 1, |
| ptype_vlc_codes[i], 1, 1, |
| ptype_vlc_syms, 1, 1, INIT_VLC_USE_STATIC); |
| for(i = 0; i < NUM_BTYPE_VLCS; i++) |
| init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE, |
| btype_vlc_bits[i], 1, 1, |
| btype_vlc_codes[i], 1, 1, |
| btype_vlc_syms, 1, 1, INIT_VLC_USE_STATIC); |
| } |
| |
| /** |
| * 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{ |
| 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; |
| |
| memset(si, 0, sizeof(SliceInfo)); |
| if(get_bits1(gb)) |
| return -1; |
| 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 -1; |
| 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(avcodec_check_dimensions(r->s.avctx, w, h) < 0) |
| return -1; |
| 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 += s->b4_stride){ |
| if(!i && s->first_slice_line){ |
| pattern = get_vlc2(gb, aic_top_vlc.table, 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[-s->b4_stride + 1]; // it won't be used for the last coefficient in a row |
| B = ptr[-s->b4_stride]; |
| C = ptr[-1]; |
| pattern = A + (B << 4) + (C << 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 |
| v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2); |
| *ptr++ = v/9; |
| *ptr++ = v%9; |
| j++; |
| }else{ |
| if(B != -1 && C != -1) |
| v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, 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; |
| int blocks[RV34_MB_TYPES] = {0}; |
| int count = 0; |
| |
| if(!r->s.mb_skip_run) { |
| r->s.mb_skip_run = svq3_get_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[5-1]) |
| blocks[r->mb_type[mb_pos - 1]]++; |
| if(r->avail_cache[5-4]){ |
| blocks[r->mb_type[mb_pos - s->mb_stride]]++; |
| if(r->avail_cache[5-2]) |
| blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; |
| if(r->avail_cache[5-5]) |
| 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(s->pict_type == FF_P_TYPE){ |
| prev_type = block_num_to_ptype_vlc_num[prev_type]; |
| q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); |
| if(q < PBTYPE_ESCAPE) |
| return q; |
| q = get_vlc2(gb, ptype_vlc[prev_type].table, 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].table, BTYPE_VLC_BITS, 1); |
| if(q < PBTYPE_ESCAPE) |
| return q; |
| q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); |
| av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); |
| } |
| return 0; |
| } |
| |
| #define CLIP_SYMM(a, b) av_clip(a, -(b), b) |
| /** |
| * weaker deblocking very similar to the one described in 4.4.2 of JVT-A003r1 |
| */ |
| static inline void rv40_weak_loop_filter(uint8_t *src, const int step, |
| const int filter_p1, const int filter_q1, |
| const int alpha, const int beta, |
| const int lim_p0q0, |
| const int lim_q1, const int lim_p1, |
| const int diff_p1p0, const int diff_q1q0, |
| const int diff_p1p2, const int diff_q1q2) |
| { |
| uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| int t, u, diff; |
| |
| t = src[0*step] - src[-1*step]; |
| if(!t) |
| return; |
| u = (alpha * FFABS(t)) >> 7; |
| if(u > 3 - (filter_p1 && filter_q1)) |
| return; |
| |
| t <<= 2; |
| if(filter_p1 && filter_q1) |
| t += src[-2*step] - src[1*step]; |
| diff = CLIP_SYMM((t + 4) >> 3, lim_p0q0); |
| src[-1*step] = cm[src[-1*step] + diff]; |
| src[ 0*step] = cm[src[ 0*step] - diff]; |
| if(FFABS(diff_p1p2) <= beta && filter_p1){ |
| t = (diff_p1p0 + diff_p1p2 - diff) >> 1; |
| src[-2*step] = cm[src[-2*step] - CLIP_SYMM(t, lim_p1)]; |
| } |
| if(FFABS(diff_q1q2) <= beta && filter_q1){ |
| t = (diff_q1q0 + diff_q1q2 + diff) >> 1; |
| src[ 1*step] = cm[src[ 1*step] - CLIP_SYMM(t, lim_q1)]; |
| } |
| } |
| |
| static inline void rv40_adaptive_loop_filter(uint8_t *src, const int step, |
| const int stride, const int dmode, |
| const int lim_q1, const int lim_p1, |
| const int alpha, |
| const int beta, const int beta2, |
| const int chroma, const int edge) |
| { |
| int diff_p1p0[4], diff_q1q0[4], diff_p1p2[4], diff_q1q2[4]; |
| int sum_p1p0 = 0, sum_q1q0 = 0, sum_p1p2 = 0, sum_q1q2 = 0; |
| uint8_t *ptr; |
| int flag_strong0 = 1, flag_strong1 = 1; |
| int filter_p1, filter_q1; |
| int i; |
| int lims; |
| |
| for(i = 0, ptr = src; i < 4; i++, ptr += stride){ |
| diff_p1p0[i] = ptr[-2*step] - ptr[-1*step]; |
| diff_q1q0[i] = ptr[ 1*step] - ptr[ 0*step]; |
| sum_p1p0 += diff_p1p0[i]; |
| sum_q1q0 += diff_q1q0[i]; |
| } |
| filter_p1 = FFABS(sum_p1p0) < (beta<<2); |
| filter_q1 = FFABS(sum_q1q0) < (beta<<2); |
| if(!filter_p1 && !filter_q1) |
| return; |
| |
| for(i = 0, ptr = src; i < 4; i++, ptr += stride){ |
| diff_p1p2[i] = ptr[-2*step] - ptr[-3*step]; |
| diff_q1q2[i] = ptr[ 1*step] - ptr[ 2*step]; |
| sum_p1p2 += diff_p1p2[i]; |
| sum_q1q2 += diff_q1q2[i]; |
| } |
| |
| if(edge){ |
| flag_strong0 = filter_p1 && (FFABS(sum_p1p2) < beta2); |
| flag_strong1 = filter_q1 && (FFABS(sum_q1q2) < beta2); |
| }else{ |
| flag_strong0 = flag_strong1 = 0; |
| } |
| |
| lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; |
| if(flag_strong0 && flag_strong1){ /* strong filtering */ |
| for(i = 0; i < 4; i++, src += stride){ |
| int sflag, p0, q0, p1, q1; |
| int t = src[0*step] - src[-1*step]; |
| |
| if(!t) continue; |
| sflag = (alpha * FFABS(t)) >> 7; |
| if(sflag > 1) continue; |
| |
| p0 = (25*src[-3*step] + 26*src[-2*step] |
| + 26*src[-1*step] |
| + 26*src[ 0*step] + 25*src[ 1*step] + rv40_dither_l[dmode + i]) >> 7; |
| q0 = (25*src[-2*step] + 26*src[-1*step] |
| + 26*src[ 0*step] |
| + 26*src[ 1*step] + 25*src[ 2*step] + rv40_dither_r[dmode + i]) >> 7; |
| if(sflag){ |
| p0 = av_clip(p0, src[-1*step] - lims, src[-1*step] + lims); |
| q0 = av_clip(q0, src[ 0*step] - lims, src[ 0*step] + lims); |
| } |
| p1 = (25*src[-4*step] + 26*src[-3*step] |
| + 26*src[-2*step] |
| + 26*p0 + 25*src[ 0*step] + rv40_dither_l[dmode + i]) >> 7; |
| q1 = (25*src[-1*step] + 26*q0 |
| + 26*src[ 1*step] |
| + 26*src[ 2*step] + 25*src[ 3*step] + rv40_dither_r[dmode + i]) >> 7; |
| if(sflag){ |
| p1 = av_clip(p1, src[-2*step] - lims, src[-2*step] + lims); |
| q1 = av_clip(q1, src[ 1*step] - lims, src[ 1*step] + lims); |
| } |
| src[-2*step] = p1; |
| src[-1*step] = p0; |
| src[ 0*step] = q0; |
| src[ 1*step] = q1; |
| if(!chroma){ |
| src[-3*step] = (25*src[-1*step] + 26*src[-2*step] + 51*src[-3*step] + 26*src[-4*step] + 64) >> 7; |
| src[ 2*step] = (25*src[ 0*step] + 26*src[ 1*step] + 51*src[ 2*step] + 26*src[ 3*step] + 64) >> 7; |
| } |
| } |
| }else if(filter_p1 && filter_q1){ |
| for(i = 0; i < 4; i++, src += stride) |
| rv40_weak_loop_filter(src, step, 1, 1, alpha, beta, lims, lim_q1, lim_p1, |
| diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); |
| }else{ |
| for(i = 0; i < 4; i++, src += stride) |
| rv40_weak_loop_filter(src, step, filter_p1, filter_q1, |
| alpha, beta, lims>>1, lim_q1>>1, lim_p1>>1, |
| diff_p1p0[i], diff_q1q0[i], diff_p1p2[i], diff_q1q2[i]); |
| } |
| } |
| |
| static void rv40_v_loop_filter(uint8_t *src, int stride, int dmode, |
| int lim_q1, int lim_p1, |
| int alpha, int beta, int beta2, int chroma, int edge){ |
| rv40_adaptive_loop_filter(src, 1, stride, dmode, lim_q1, lim_p1, |
| alpha, beta, beta2, chroma, edge); |
| } |
| static void rv40_h_loop_filter(uint8_t *src, int stride, int dmode, |
| int lim_q1, int lim_p1, |
| int alpha, int beta, int beta2, int chroma, int edge){ |
| rv40_adaptive_loop_filter(src, stride, 1, dmode, lim_q1, lim_p1, |
| alpha, beta, beta2, chroma, edge); |
| } |
| |
| 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 }; |
| |
| /** |
| * 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 because they lie at the edge of |
| * 8x8 block with different enough motion vectors |
| */ |
| int 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]; |
| int y_to_deblock, 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->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_h_loop_filter(Y+4*s->linesize, s->linesize, dither, |
| y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0, |
| clip_cur, |
| alpha, beta, betaY, 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_v_loop_filter(Y, s->linesize, dither, |
| clip_cur, |
| clip_left, |
| alpha, beta, betaY, 0, 0); |
| } |
| // 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_h_loop_filter(Y, s->linesize, dither, |
| clip_cur, |
| mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0, |
| alpha, beta, betaY, 0, 1); |
| } |
| // 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_v_loop_filter(Y, s->linesize, dither, |
| clip_cur, |
| clip_left, |
| alpha, beta, betaY, 0, 1); |
| } |
| } |
| } |
| for(k = 0; k < 2; k++){ |
| for(j = 0; j < 2; j++){ |
| C = s->current_picture_ptr->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_h_loop_filter(C+4*s->uvlinesize, s->uvlinesize, i*8, |
| clip_bot, |
| clip_cur, |
| alpha, beta, betaC, 1, 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_v_loop_filter(C, s->uvlinesize, j*8, |
| clip_cur, |
| clip_left, |
| alpha, beta, betaC, 1, 0); |
| } |
| 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_h_loop_filter(C, s->uvlinesize, i*8, |
| clip_cur, |
| clip_top, |
| alpha, beta, betaC, 1, 1); |
| } |
| 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_v_loop_filter(C, s->uvlinesize, j*8, |
| clip_cur, |
| clip_left, |
| alpha, beta, betaC, 1, 1); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Initialize decoder. |
| */ |
| static av_cold int rv40_decode_init(AVCodecContext *avctx) |
| { |
| RV34DecContext *r = avctx->priv_data; |
| |
| r->rv30 = 0; |
| ff_rv34_decode_init(avctx); |
| if(!aic_top_vlc.bits) |
| rv40_init_tables(); |
| 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]; |
| return 0; |
| } |
| |
| AVCodec rv40_decoder = { |
| "rv40", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_RV40, |
| sizeof(RV34DecContext), |
| rv40_decode_init, |
| NULL, |
| ff_rv34_decode_end, |
| ff_rv34_decode_frame, |
| CODEC_CAP_DR1 | CODEC_CAP_DELAY, |
| .flush = ff_mpeg_flush, |
| .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"), |
| .pix_fmts= ff_pixfmt_list_420, |
| }; |
