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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * RV40 decoder |
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| 3 | * Copyright (c) 2007 Konstantin Shishkov |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * RV40 decoder |
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| 25 | */ |
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| 26 | |||
| 27 | #include "libavutil/imgutils.h" |
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| 28 | |||
| 29 | #include "avcodec.h" |
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| 30 | #include "mpegvideo.h" |
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| 31 | #include "golomb.h" |
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| 32 | |||
| 33 | #include "rv34.h" |
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| 34 | #include "rv40vlc2.h" |
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| 35 | #include "rv40data.h" |
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| 36 | |||
| 37 | static VLC aic_top_vlc; |
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| 38 | static VLC aic_mode1_vlc[AIC_MODE1_NUM], aic_mode2_vlc[AIC_MODE2_NUM]; |
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| 39 | static VLC ptype_vlc[NUM_PTYPE_VLCS], btype_vlc[NUM_BTYPE_VLCS]; |
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| 40 | |||
| 41 | static const int16_t mode2_offs[] = { |
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| 42 | 0, 614, 1222, 1794, 2410, 3014, 3586, 4202, 4792, 5382, 5966, 6542, |
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| 43 | 7138, 7716, 8292, 8864, 9444, 10030, 10642, 11212, 11814 |
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| 44 | }; |
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| 45 | |||
| 46 | /** |
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| 47 | * Initialize all tables. |
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| 48 | */ |
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| 49 | static av_cold void rv40_init_tables(void) |
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| 50 | { |
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| 51 | int i; |
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| 52 | static VLC_TYPE aic_table[1 << AIC_TOP_BITS][2]; |
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| 53 | static VLC_TYPE aic_mode1_table[AIC_MODE1_NUM << AIC_MODE1_BITS][2]; |
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| 54 | static VLC_TYPE aic_mode2_table[11814][2]; |
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| 55 | static VLC_TYPE ptype_table[NUM_PTYPE_VLCS << PTYPE_VLC_BITS][2]; |
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| 56 | static VLC_TYPE btype_table[NUM_BTYPE_VLCS << BTYPE_VLC_BITS][2]; |
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| 57 | |||
| 58 | aic_top_vlc.table = aic_table; |
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| 59 | aic_top_vlc.table_allocated = 1 << AIC_TOP_BITS; |
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| 60 | init_vlc(&aic_top_vlc, AIC_TOP_BITS, AIC_TOP_SIZE, |
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| 61 | rv40_aic_top_vlc_bits, 1, 1, |
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| 62 | rv40_aic_top_vlc_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); |
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| 63 | for(i = 0; i < AIC_MODE1_NUM; i++){ |
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| 64 | // Every tenth VLC table is empty |
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| 65 | if((i % 10) == 9) continue; |
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| 66 | aic_mode1_vlc[i].table = &aic_mode1_table[i << AIC_MODE1_BITS]; |
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| 67 | aic_mode1_vlc[i].table_allocated = 1 << AIC_MODE1_BITS; |
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| 68 | init_vlc(&aic_mode1_vlc[i], AIC_MODE1_BITS, AIC_MODE1_SIZE, |
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| 69 | aic_mode1_vlc_bits[i], 1, 1, |
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| 70 | aic_mode1_vlc_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); |
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| 71 | } |
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| 72 | for(i = 0; i < AIC_MODE2_NUM; i++){ |
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| 73 | aic_mode2_vlc[i].table = &aic_mode2_table[mode2_offs[i]]; |
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| 74 | aic_mode2_vlc[i].table_allocated = mode2_offs[i + 1] - mode2_offs[i]; |
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| 75 | init_vlc(&aic_mode2_vlc[i], AIC_MODE2_BITS, AIC_MODE2_SIZE, |
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| 76 | aic_mode2_vlc_bits[i], 1, 1, |
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| 77 | aic_mode2_vlc_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
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| 78 | } |
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| 79 | for(i = 0; i < NUM_PTYPE_VLCS; i++){ |
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| 80 | ptype_vlc[i].table = &ptype_table[i << PTYPE_VLC_BITS]; |
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| 81 | ptype_vlc[i].table_allocated = 1 << PTYPE_VLC_BITS; |
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| 82 | ff_init_vlc_sparse(&ptype_vlc[i], PTYPE_VLC_BITS, PTYPE_VLC_SIZE, |
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| 83 | ptype_vlc_bits[i], 1, 1, |
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| 84 | ptype_vlc_codes[i], 1, 1, |
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| 85 | ptype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); |
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| 86 | } |
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| 87 | for(i = 0; i < NUM_BTYPE_VLCS; i++){ |
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| 88 | btype_vlc[i].table = &btype_table[i << BTYPE_VLC_BITS]; |
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| 89 | btype_vlc[i].table_allocated = 1 << BTYPE_VLC_BITS; |
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| 90 | ff_init_vlc_sparse(&btype_vlc[i], BTYPE_VLC_BITS, BTYPE_VLC_SIZE, |
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| 91 | btype_vlc_bits[i], 1, 1, |
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| 92 | btype_vlc_codes[i], 1, 1, |
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| 93 | btype_vlc_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); |
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| 94 | } |
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| 95 | } |
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| 96 | |||
| 97 | /** |
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| 98 | * Get stored dimension from bitstream. |
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| 99 | * |
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| 100 | * If the width/height is the standard one then it's coded as a 3-bit index. |
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| 101 | * Otherwise it is coded as escaped 8-bit portions. |
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| 102 | */ |
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| 103 | static int get_dimension(GetBitContext *gb, const int *dim) |
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| 104 | { |
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| 105 | int t = get_bits(gb, 3); |
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| 106 | int val = dim[t]; |
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| 107 | if(val < 0) |
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| 108 | val = dim[get_bits1(gb) - val]; |
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| 109 | if(!val){ |
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| 110 | do{ |
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| 111 | t = get_bits(gb, 8); |
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| 112 | val += t << 2; |
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| 113 | }while(t == 0xFF); |
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| 114 | } |
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| 115 | return val; |
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| 116 | } |
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| 117 | |||
| 118 | /** |
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| 119 | * Get encoded picture size - usually this is called from rv40_parse_slice_header. |
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| 120 | */ |
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| 121 | static void rv40_parse_picture_size(GetBitContext *gb, int *w, int *h) |
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| 122 | { |
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| 123 | *w = get_dimension(gb, rv40_standard_widths); |
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| 124 | *h = get_dimension(gb, rv40_standard_heights); |
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| 125 | } |
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| 126 | |||
| 127 | static int rv40_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si) |
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| 128 | { |
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| 129 | int mb_bits; |
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| 130 | int w = r->s.width, h = r->s.height; |
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| 131 | int mb_size; |
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| 132 | |||
| 133 | memset(si, 0, sizeof(SliceInfo)); |
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| 134 | if(get_bits1(gb)) |
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| 135 | return -1; |
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| 136 | si->type = get_bits(gb, 2); |
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| 137 | if(si->type == 1) si->type = 0; |
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| 138 | si->quant = get_bits(gb, 5); |
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| 139 | if(get_bits(gb, 2)) |
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| 140 | return -1; |
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| 141 | si->vlc_set = get_bits(gb, 2); |
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| 142 | skip_bits1(gb); |
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| 143 | si->pts = get_bits(gb, 13); |
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| 144 | if(!si->type || !get_bits1(gb)) |
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| 145 | rv40_parse_picture_size(gb, &w, &h); |
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| 146 | if(av_image_check_size(w, h, 0, r->s.avctx) < 0) |
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| 147 | return -1; |
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| 148 | si->width = w; |
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| 149 | si->height = h; |
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| 150 | mb_size = ((w + 15) >> 4) * ((h + 15) >> 4); |
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| 151 | mb_bits = ff_rv34_get_start_offset(gb, mb_size); |
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| 152 | si->start = get_bits(gb, mb_bits); |
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| 153 | |||
| 154 | return 0; |
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| 155 | } |
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| 156 | |||
| 157 | /** |
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| 158 | * Decode 4x4 intra types array. |
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| 159 | */ |
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| 160 | static int rv40_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst) |
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| 161 | { |
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| 162 | MpegEncContext *s = &r->s; |
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| 163 | int i, j, k, v; |
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| 164 | int A, B, C; |
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| 165 | int pattern; |
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| 166 | int8_t *ptr; |
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| 167 | |||
| 168 | for(i = 0; i < 4; i++, dst += r->intra_types_stride){ |
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| 169 | if(!i && s->first_slice_line){ |
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| 170 | pattern = get_vlc2(gb, aic_top_vlc.table, AIC_TOP_BITS, 1); |
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| 171 | dst[0] = (pattern >> 2) & 2; |
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| 172 | dst[1] = (pattern >> 1) & 2; |
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| 173 | dst[2] = pattern & 2; |
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| 174 | dst[3] = (pattern << 1) & 2; |
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| 175 | continue; |
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| 176 | } |
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| 177 | ptr = dst; |
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| 178 | for(j = 0; j < 4; j++){ |
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| 179 | /* Coefficients are read using VLC chosen by the prediction pattern |
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| 180 | * The first one (used for retrieving a pair of coefficients) is |
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| 181 | * constructed from the top, top right and left coefficients |
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| 182 | * The second one (used for retrieving only one coefficient) is |
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| 183 | * top + 10 * left. |
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| 184 | */ |
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| 185 | A = ptr[-r->intra_types_stride + 1]; // it won't be used for the last coefficient in a row |
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| 186 | B = ptr[-r->intra_types_stride]; |
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| 187 | C = ptr[-1]; |
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| 188 | pattern = A + (B << 4) + (C << 8); |
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| 189 | for(k = 0; k < MODE2_PATTERNS_NUM; k++) |
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| 190 | if(pattern == rv40_aic_table_index[k]) |
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| 191 | break; |
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| 192 | if(j < 3 && k < MODE2_PATTERNS_NUM){ //pattern is found, decoding 2 coefficients |
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| 193 | v = get_vlc2(gb, aic_mode2_vlc[k].table, AIC_MODE2_BITS, 2); |
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| 194 | *ptr++ = v/9; |
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| 195 | *ptr++ = v%9; |
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| 196 | j++; |
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| 197 | }else{ |
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| 198 | if(B != -1 && C != -1) |
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| 199 | v = get_vlc2(gb, aic_mode1_vlc[B + C*10].table, AIC_MODE1_BITS, 1); |
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| 200 | else{ // tricky decoding |
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| 201 | v = 0; |
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| 202 | switch(C){ |
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| 203 | case -1: // code 0 -> 1, 1 -> 0 |
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| 204 | if(B < 2) |
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| 205 | v = get_bits1(gb) ^ 1; |
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| 206 | break; |
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| 207 | case 0: |
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| 208 | case 2: // code 0 -> 2, 1 -> 0 |
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| 209 | v = (get_bits1(gb) ^ 1) << 1; |
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| 210 | break; |
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| 211 | } |
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| 212 | } |
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| 213 | *ptr++ = v; |
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| 214 | } |
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| 215 | } |
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| 216 | } |
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| 217 | return 0; |
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| 218 | } |
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| 219 | |||
| 220 | /** |
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| 221 | * Decode macroblock information. |
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| 222 | */ |
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| 223 | static int rv40_decode_mb_info(RV34DecContext *r) |
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| 224 | { |
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| 225 | MpegEncContext *s = &r->s; |
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| 226 | GetBitContext *gb = &s->gb; |
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| 227 | int q, i; |
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| 228 | int prev_type = 0; |
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| 229 | int mb_pos = s->mb_x + s->mb_y * s->mb_stride; |
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| 230 | |||
| 231 | if(!r->s.mb_skip_run) { |
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| 232 | r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1; |
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| 233 | if(r->s.mb_skip_run > (unsigned)s->mb_num) |
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| 234 | return -1; |
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| 235 | } |
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| 236 | |||
| 237 | if(--r->s.mb_skip_run) |
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| 238 | return RV34_MB_SKIP; |
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| 239 | |||
| 240 | if(r->avail_cache[6-4]){ |
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| 241 | int blocks[RV34_MB_TYPES] = {0}; |
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| 242 | int count = 0; |
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| 243 | if(r->avail_cache[6-1]) |
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| 244 | blocks[r->mb_type[mb_pos - 1]]++; |
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| 245 | blocks[r->mb_type[mb_pos - s->mb_stride]]++; |
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| 246 | if(r->avail_cache[6-2]) |
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| 247 | blocks[r->mb_type[mb_pos - s->mb_stride + 1]]++; |
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| 248 | if(r->avail_cache[6-5]) |
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| 249 | blocks[r->mb_type[mb_pos - s->mb_stride - 1]]++; |
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| 250 | for(i = 0; i < RV34_MB_TYPES; i++){ |
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| 251 | if(blocks[i] > count){ |
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| 252 | count = blocks[i]; |
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| 253 | prev_type = i; |
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| 254 | if(count>1) |
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| 255 | break; |
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| 256 | } |
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| 257 | } |
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| 258 | } else if (r->avail_cache[6-1]) |
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| 259 | prev_type = r->mb_type[mb_pos - 1]; |
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| 260 | |||
| 261 | if(s->pict_type == AV_PICTURE_TYPE_P){ |
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| 262 | prev_type = block_num_to_ptype_vlc_num[prev_type]; |
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| 263 | q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); |
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| 264 | if(q < PBTYPE_ESCAPE) |
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| 265 | return q; |
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| 266 | q = get_vlc2(gb, ptype_vlc[prev_type].table, PTYPE_VLC_BITS, 1); |
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| 267 | av_log(s->avctx, AV_LOG_ERROR, "Dquant for P-frame\n"); |
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| 268 | }else{ |
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| 269 | prev_type = block_num_to_btype_vlc_num[prev_type]; |
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| 270 | q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); |
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| 271 | if(q < PBTYPE_ESCAPE) |
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| 272 | return q; |
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| 273 | q = get_vlc2(gb, btype_vlc[prev_type].table, BTYPE_VLC_BITS, 1); |
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| 274 | av_log(s->avctx, AV_LOG_ERROR, "Dquant for B-frame\n"); |
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| 275 | } |
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| 276 | return 0; |
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| 277 | } |
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| 278 | |||
| 279 | enum RV40BlockPos{ |
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| 280 | POS_CUR, |
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| 281 | POS_TOP, |
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| 282 | POS_LEFT, |
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| 283 | POS_BOTTOM, |
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| 284 | }; |
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| 285 | |||
| 286 | #define MASK_CUR 0x0001 |
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| 287 | #define MASK_RIGHT 0x0008 |
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| 288 | #define MASK_BOTTOM 0x0010 |
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| 289 | #define MASK_TOP 0x1000 |
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| 290 | #define MASK_Y_TOP_ROW 0x000F |
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| 291 | #define MASK_Y_LAST_ROW 0xF000 |
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| 292 | #define MASK_Y_LEFT_COL 0x1111 |
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| 293 | #define MASK_Y_RIGHT_COL 0x8888 |
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| 294 | #define MASK_C_TOP_ROW 0x0003 |
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| 295 | #define MASK_C_LAST_ROW 0x000C |
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| 296 | #define MASK_C_LEFT_COL 0x0005 |
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| 297 | #define MASK_C_RIGHT_COL 0x000A |
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| 298 | |||
| 299 | static const int neighbour_offs_x[4] = { 0, 0, -1, 0 }; |
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| 300 | static const int neighbour_offs_y[4] = { 0, -1, 0, 1 }; |
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| 301 | |||
| 302 | static void rv40_adaptive_loop_filter(RV34DSPContext *rdsp, |
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| 303 | uint8_t *src, int stride, int dmode, |
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| 304 | int lim_q1, int lim_p1, |
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| 305 | int alpha, int beta, int beta2, |
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| 306 | int chroma, int edge, int dir) |
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| 307 | { |
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| 308 | int filter_p1, filter_q1; |
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| 309 | int strong; |
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| 310 | int lims; |
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| 311 | |||
| 312 | strong = rdsp->rv40_loop_filter_strength[dir](src, stride, beta, beta2, |
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| 313 | edge, &filter_p1, &filter_q1); |
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| 314 | |||
| 315 | lims = filter_p1 + filter_q1 + ((lim_q1 + lim_p1) >> 1) + 1; |
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| 316 | |||
| 317 | if (strong) { |
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| 318 | rdsp->rv40_strong_loop_filter[dir](src, stride, alpha, |
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| 319 | lims, dmode, chroma); |
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| 320 | } else if (filter_p1 & filter_q1) { |
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| 321 | rdsp->rv40_weak_loop_filter[dir](src, stride, 1, 1, alpha, beta, |
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| 322 | lims, lim_q1, lim_p1); |
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| 323 | } else if (filter_p1 | filter_q1) { |
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| 324 | rdsp->rv40_weak_loop_filter[dir](src, stride, filter_p1, filter_q1, |
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| 325 | alpha, beta, lims >> 1, lim_q1 >> 1, |
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| 326 | lim_p1 >> 1); |
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| 327 | } |
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| 328 | } |
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| 329 | |||
| 330 | /** |
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| 331 | * RV40 loop filtering function |
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| 332 | */ |
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| 333 | static void rv40_loop_filter(RV34DecContext *r, int row) |
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| 334 | { |
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| 335 | MpegEncContext *s = &r->s; |
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| 336 | int mb_pos, mb_x; |
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| 337 | int i, j, k; |
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| 338 | uint8_t *Y, *C; |
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| 339 | int alpha, beta, betaY, betaC; |
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| 340 | int q; |
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| 341 | int mbtype[4]; ///< current macroblock and its neighbours types |
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| 342 | /** |
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| 343 | * flags indicating that macroblock can be filtered with strong filter |
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| 344 | * it is set only for intra coded MB and MB with DCs coded separately |
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| 345 | */ |
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| 346 | int mb_strong[4]; |
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| 347 | int clip[4]; ///< MB filter clipping value calculated from filtering strength |
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| 348 | /** |
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| 349 | * coded block patterns for luma part of current macroblock and its neighbours |
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| 350 | * Format: |
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| 351 | * LSB corresponds to the top left block, |
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| 352 | * each nibble represents one row of subblocks. |
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| 353 | */ |
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| 354 | int cbp[4]; |
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| 355 | /** |
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| 356 | * coded block patterns for chroma part of current macroblock and its neighbours |
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| 357 | * Format is the same as for luma with two subblocks in a row. |
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| 358 | */ |
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| 359 | int uvcbp[4][2]; |
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| 360 | /** |
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| 361 | * This mask represents the pattern of luma subblocks that should be filtered |
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| 362 | * in addition to the coded ones because they lie at the edge of |
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| 363 | * 8x8 block with different enough motion vectors |
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| 364 | */ |
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| 365 | unsigned mvmasks[4]; |
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| 366 | |||
| 367 | mb_pos = row * s->mb_stride; |
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| 368 | for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ |
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| 369 | int mbtype = s->current_picture_ptr->mb_type[mb_pos]; |
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| 370 | if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype)) |
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| 371 | r->cbp_luma [mb_pos] = r->deblock_coefs[mb_pos] = 0xFFFF; |
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| 372 | if(IS_INTRA(mbtype)) |
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| 373 | r->cbp_chroma[mb_pos] = 0xFF; |
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| 374 | } |
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| 375 | mb_pos = row * s->mb_stride; |
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| 376 | for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){ |
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| 377 | int y_h_deblock, y_v_deblock; |
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| 378 | int c_v_deblock[2], c_h_deblock[2]; |
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| 379 | int clip_left; |
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| 380 | int avail[4]; |
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| 381 | unsigned y_to_deblock; |
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| 382 | int c_to_deblock[2]; |
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| 383 | |||
| 384 | q = s->current_picture_ptr->qscale_table[mb_pos]; |
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| 385 | alpha = rv40_alpha_tab[q]; |
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| 386 | beta = rv40_beta_tab [q]; |
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| 387 | betaY = betaC = beta * 3; |
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| 388 | if(s->width * s->height <= 176*144) |
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| 389 | betaY += beta; |
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| 390 | |||
| 391 | avail[0] = 1; |
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| 392 | avail[1] = row; |
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| 393 | avail[2] = mb_x; |
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| 394 | avail[3] = row < s->mb_height - 1; |
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| 395 | for(i = 0; i < 4; i++){ |
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| 396 | if(avail[i]){ |
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| 397 | int pos = mb_pos + neighbour_offs_x[i] + neighbour_offs_y[i]*s->mb_stride; |
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| 398 | mvmasks[i] = r->deblock_coefs[pos]; |
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| 399 | mbtype [i] = s->current_picture_ptr->mb_type[pos]; |
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| 400 | cbp [i] = r->cbp_luma[pos]; |
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| 401 | uvcbp[i][0] = r->cbp_chroma[pos] & 0xF; |
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| 402 | uvcbp[i][1] = r->cbp_chroma[pos] >> 4; |
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| 403 | }else{ |
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| 404 | mvmasks[i] = 0; |
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| 405 | mbtype [i] = mbtype[0]; |
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| 406 | cbp [i] = 0; |
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| 407 | uvcbp[i][0] = uvcbp[i][1] = 0; |
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| 408 | } |
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| 409 | mb_strong[i] = IS_INTRA(mbtype[i]) || IS_SEPARATE_DC(mbtype[i]); |
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| 410 | clip[i] = rv40_filter_clip_tbl[mb_strong[i] + 1][q]; |
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| 411 | } |
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| 412 | y_to_deblock = mvmasks[POS_CUR] |
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| 413 | | (mvmasks[POS_BOTTOM] << 16); |
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| 414 | /* This pattern contains bits signalling that horizontal edges of |
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| 415 | * the current block can be filtered. |
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| 416 | * That happens when either of adjacent subblocks is coded or lies on |
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| 417 | * the edge of 8x8 blocks with motion vectors differing by more than |
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| 418 | * 3/4 pel in any component (any edge orientation for some reason). |
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| 419 | */ |
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| 420 | y_h_deblock = y_to_deblock |
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| 421 | | ((cbp[POS_CUR] << 4) & ~MASK_Y_TOP_ROW) |
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| 422 | | ((cbp[POS_TOP] & MASK_Y_LAST_ROW) >> 12); |
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| 423 | /* This pattern contains bits signalling that vertical edges of |
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| 424 | * the current block can be filtered. |
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| 425 | * That happens when either of adjacent subblocks is coded or lies on |
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| 426 | * the edge of 8x8 blocks with motion vectors differing by more than |
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| 427 | * 3/4 pel in any component (any edge orientation for some reason). |
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| 428 | */ |
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| 429 | y_v_deblock = y_to_deblock |
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| 430 | | ((cbp[POS_CUR] << 1) & ~MASK_Y_LEFT_COL) |
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| 431 | | ((cbp[POS_LEFT] & MASK_Y_RIGHT_COL) >> 3); |
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| 432 | if(!mb_x) |
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| 433 | y_v_deblock &= ~MASK_Y_LEFT_COL; |
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| 434 | if(!row) |
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| 435 | y_h_deblock &= ~MASK_Y_TOP_ROW; |
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| 436 | if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM])) |
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| 437 | y_h_deblock &= ~(MASK_Y_TOP_ROW << 16); |
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| 438 | /* Calculating chroma patterns is similar and easier since there is |
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| 439 | * no motion vector pattern for them. |
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| 440 | */ |
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| 441 | for(i = 0; i < 2; i++){ |
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| 442 | c_to_deblock[i] = (uvcbp[POS_BOTTOM][i] << 4) | uvcbp[POS_CUR][i]; |
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| 443 | c_v_deblock[i] = c_to_deblock[i] |
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| 444 | | ((uvcbp[POS_CUR] [i] << 1) & ~MASK_C_LEFT_COL) |
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| 445 | | ((uvcbp[POS_LEFT][i] & MASK_C_RIGHT_COL) >> 1); |
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| 446 | c_h_deblock[i] = c_to_deblock[i] |
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| 447 | | ((uvcbp[POS_TOP][i] & MASK_C_LAST_ROW) >> 2) |
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| 448 | | (uvcbp[POS_CUR][i] << 2); |
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| 449 | if(!mb_x) |
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| 450 | c_v_deblock[i] &= ~MASK_C_LEFT_COL; |
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| 451 | if(!row) |
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| 452 | c_h_deblock[i] &= ~MASK_C_TOP_ROW; |
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| 453 | if(row == s->mb_height - 1 || (mb_strong[POS_CUR] | mb_strong[POS_BOTTOM])) |
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| 454 | c_h_deblock[i] &= ~(MASK_C_TOP_ROW << 4); |
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| 455 | } |
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| 456 | |||
| 457 | for(j = 0; j < 16; j += 4){ |
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| 458 | Y = s->current_picture_ptr->f.data[0] + mb_x*16 + (row*16 + j) * s->linesize; |
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| 459 | for(i = 0; i < 4; i++, Y += 4){ |
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| 460 | int ij = i + j; |
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| 461 | int clip_cur = y_to_deblock & (MASK_CUR << ij) ? clip[POS_CUR] : 0; |
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| 462 | int dither = j ? ij : i*4; |
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| 463 | |||
| 464 | // if bottom block is coded then we can filter its top edge |
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| 465 | // (or bottom edge of this block, which is the same) |
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| 466 | if(y_h_deblock & (MASK_BOTTOM << ij)){ |
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| 467 | rv40_adaptive_loop_filter(&r->rdsp, Y+4*s->linesize, |
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| 468 | s->linesize, dither, |
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| 469 | y_to_deblock & (MASK_BOTTOM << ij) ? clip[POS_CUR] : 0, |
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| 470 | clip_cur, alpha, beta, betaY, |
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| 471 | 0, 0, 0); |
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| 472 | } |
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| 473 | // filter left block edge in ordinary mode (with low filtering strength) |
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| 474 | if(y_v_deblock & (MASK_CUR << ij) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){ |
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| 475 | if(!i) |
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| 476 | clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; |
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| 477 | else |
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| 478 | clip_left = y_to_deblock & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; |
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| 479 | rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, |
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| 480 | clip_cur, |
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| 481 | clip_left, |
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| 482 | alpha, beta, betaY, 0, 0, 1); |
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| 483 | } |
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| 484 | // filter top edge of the current macroblock when filtering strength is high |
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| 485 | if(!j && y_h_deblock & (MASK_CUR << i) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){ |
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| 486 | rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, |
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| 487 | clip_cur, |
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| 488 | mvmasks[POS_TOP] & (MASK_TOP << i) ? clip[POS_TOP] : 0, |
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| 489 | alpha, beta, betaY, 0, 1, 0); |
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| 490 | } |
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| 491 | // filter left block edge in edge mode (with high filtering strength) |
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| 492 | if(y_v_deblock & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){ |
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| 493 | clip_left = mvmasks[POS_LEFT] & (MASK_RIGHT << j) ? clip[POS_LEFT] : 0; |
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| 494 | rv40_adaptive_loop_filter(&r->rdsp, Y, s->linesize, dither, |
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| 495 | clip_cur, |
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| 496 | clip_left, |
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| 497 | alpha, beta, betaY, 0, 1, 1); |
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| 498 | } |
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| 499 | } |
||
| 500 | } |
||
| 501 | for(k = 0; k < 2; k++){ |
||
| 502 | for(j = 0; j < 2; j++){ |
||
| 503 | C = s->current_picture_ptr->f.data[k + 1] + mb_x*8 + (row*8 + j*4) * s->uvlinesize; |
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| 504 | for(i = 0; i < 2; i++, C += 4){ |
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| 505 | int ij = i + j*2; |
||
| 506 | int clip_cur = c_to_deblock[k] & (MASK_CUR << ij) ? clip[POS_CUR] : 0; |
||
| 507 | if(c_h_deblock[k] & (MASK_CUR << (ij+2))){ |
||
| 508 | int clip_bot = c_to_deblock[k] & (MASK_CUR << (ij+2)) ? clip[POS_CUR] : 0; |
||
| 509 | rv40_adaptive_loop_filter(&r->rdsp, C+4*s->uvlinesize, s->uvlinesize, i*8, |
||
| 510 | clip_bot, |
||
| 511 | clip_cur, |
||
| 512 | alpha, beta, betaC, 1, 0, 0); |
||
| 513 | } |
||
| 514 | if((c_v_deblock[k] & (MASK_CUR << ij)) && (i || !(mb_strong[POS_CUR] | mb_strong[POS_LEFT]))){ |
||
| 515 | if(!i) |
||
| 516 | clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; |
||
| 517 | else |
||
| 518 | clip_left = c_to_deblock[k] & (MASK_CUR << (ij-1)) ? clip[POS_CUR] : 0; |
||
| 519 | rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8, |
||
| 520 | clip_cur, |
||
| 521 | clip_left, |
||
| 522 | alpha, beta, betaC, 1, 0, 1); |
||
| 523 | } |
||
| 524 | if(!j && c_h_deblock[k] & (MASK_CUR << ij) && (mb_strong[POS_CUR] | mb_strong[POS_TOP])){ |
||
| 525 | int clip_top = uvcbp[POS_TOP][k] & (MASK_CUR << (ij+2)) ? clip[POS_TOP] : 0; |
||
| 526 | rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, i*8, |
||
| 527 | clip_cur, |
||
| 528 | clip_top, |
||
| 529 | alpha, beta, betaC, 1, 1, 0); |
||
| 530 | } |
||
| 531 | if(c_v_deblock[k] & (MASK_CUR << ij) && !i && (mb_strong[POS_CUR] | mb_strong[POS_LEFT])){ |
||
| 532 | clip_left = uvcbp[POS_LEFT][k] & (MASK_CUR << (2*j+1)) ? clip[POS_LEFT] : 0; |
||
| 533 | rv40_adaptive_loop_filter(&r->rdsp, C, s->uvlinesize, j*8, |
||
| 534 | clip_cur, |
||
| 535 | clip_left, |
||
| 536 | alpha, beta, betaC, 1, 1, 1); |
||
| 537 | } |
||
| 538 | } |
||
| 539 | } |
||
| 540 | } |
||
| 541 | } |
||
| 542 | } |
||
| 543 | |||
| 544 | /** |
||
| 545 | * Initialize decoder. |
||
| 546 | */ |
||
| 547 | static av_cold int rv40_decode_init(AVCodecContext *avctx) |
||
| 548 | { |
||
| 549 | RV34DecContext *r = avctx->priv_data; |
||
| 550 | int ret; |
||
| 551 | |||
| 552 | r->rv30 = 0; |
||
| 553 | if ((ret = ff_rv34_decode_init(avctx)) < 0) |
||
| 554 | return ret; |
||
| 555 | if(!aic_top_vlc.bits) |
||
| 556 | rv40_init_tables(); |
||
| 557 | r->parse_slice_header = rv40_parse_slice_header; |
||
| 558 | r->decode_intra_types = rv40_decode_intra_types; |
||
| 559 | r->decode_mb_info = rv40_decode_mb_info; |
||
| 560 | r->loop_filter = rv40_loop_filter; |
||
| 561 | r->luma_dc_quant_i = rv40_luma_dc_quant[0]; |
||
| 562 | r->luma_dc_quant_p = rv40_luma_dc_quant[1]; |
||
| 563 | return 0; |
||
| 564 | } |
||
| 565 | |||
| 566 | AVCodec ff_rv40_decoder = { |
||
| 567 | .name = "rv40", |
||
| 568 | .long_name = NULL_IF_CONFIG_SMALL("RealVideo 4.0"), |
||
| 569 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 570 | .id = AV_CODEC_ID_RV40, |
||
| 571 | .priv_data_size = sizeof(RV34DecContext), |
||
| 572 | .init = rv40_decode_init, |
||
| 573 | .close = ff_rv34_decode_end, |
||
| 574 | .decode = ff_rv34_decode_frame, |
||
| 575 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY | |
||
| 576 | CODEC_CAP_FRAME_THREADS, |
||
| 577 | .flush = ff_mpeg_flush, |
||
| 578 | .pix_fmts = ff_pixfmt_list_420, |
||
| 579 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_init_thread_copy), |
||
| 580 | .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context), |
||
| 581 | }; |