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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * DV decoder |
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3 | * Copyright (c) 2002 Fabrice Bellard |
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4 | * Copyright (c) 2004 Roman Shaposhnik |
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5 | * |
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6 | * DV encoder |
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7 | * Copyright (c) 2003 Roman Shaposhnik |
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8 | * |
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9 | * 50 Mbps (DVCPRO50) support |
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10 | * Copyright (c) 2006 Daniel Maas |
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11 | * |
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12 | * 100 Mbps (DVCPRO HD) support |
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13 | * Initial code by Daniel Maas |
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14 | * Final code by Roman Shaposhnik |
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15 | * |
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16 | * Many thanks to Dan Dennedy |
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17 | * of DV technical info. |
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18 | * |
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19 | * This file is part of FFmpeg. |
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20 | * |
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21 | * FFmpeg is free software; you can redistribute it and/or |
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22 | * modify it under the terms of the GNU Lesser General Public |
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23 | * License as published by the Free Software Foundation; either |
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24 | * version 2.1 of the License, or (at your option) any later version. |
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25 | * |
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26 | * FFmpeg is distributed in the hope that it will be useful, |
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27 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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28 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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29 | * Lesser General Public License for more details. |
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30 | * |
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31 | * You should have received a copy of the GNU Lesser General Public |
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32 | * License along with FFmpeg; if not, write to the Free Software |
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33 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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34 | */ |
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35 | |||
36 | /** |
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37 | * @file |
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38 | * DV codec. |
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39 | */ |
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40 | |||
41 | #include "libavutil/internal.h" |
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42 | #include "libavutil/pixdesc.h" |
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43 | #include "avcodec.h" |
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44 | #include "get_bits.h" |
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45 | #include "internal.h" |
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46 | #include "put_bits.h" |
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47 | #include "simple_idct.h" |
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48 | #include "dvdata.h" |
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49 | #include "dv_tablegen.h" |
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50 | |||
51 | /* XXX: also include quantization */ |
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52 | RL_VLC_ELEM ff_dv_rl_vlc[1184]; |
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53 | |||
54 | static inline void dv_calc_mb_coordinates(const DVprofile *d, int chan, int seq, int slot, |
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55 | uint16_t *tbl) |
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56 | { |
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57 | static const uint8_t off[] = { 2, 6, 8, 0, 4 }; |
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58 | static const uint8_t shuf1[] = { 36, 18, 54, 0, 72 }; |
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59 | static const uint8_t shuf2[] = { 24, 12, 36, 0, 48 }; |
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60 | static const uint8_t shuf3[] = { 18, 9, 27, 0, 36 }; |
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61 | |||
62 | static const uint8_t l_start[] = {0, 4, 9, 13, 18, 22, 27, 31, 36, 40}; |
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63 | static const uint8_t l_start_shuffled[] = { 9, 4, 13, 0, 18 }; |
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64 | |||
65 | static const uint8_t serpent1[] = {0, 1, 2, 2, 1, 0, |
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66 | 0, 1, 2, 2, 1, 0, |
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67 | 0, 1, 2, 2, 1, 0, |
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68 | 0, 1, 2, 2, 1, 0, |
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69 | 0, 1, 2}; |
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70 | static const uint8_t serpent2[] = {0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
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71 | 0, 1, 2, 3, 4, 5, 5, 4, 3, 2, 1, 0, |
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72 | 0, 1, 2, 3, 4, 5}; |
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73 | |||
74 | static const uint8_t remap[][2] = {{ 0, 0}, { 0, 0}, { 0, 0}, { 0, 0}, /* dummy */ |
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75 | { 0, 0}, { 0, 1}, { 0, 2}, { 0, 3}, {10, 0}, |
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76 | {10, 1}, {10, 2}, {10, 3}, {20, 0}, {20, 1}, |
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77 | {20, 2}, {20, 3}, {30, 0}, {30, 1}, {30, 2}, |
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78 | {30, 3}, {40, 0}, {40, 1}, {40, 2}, {40, 3}, |
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79 | {50, 0}, {50, 1}, {50, 2}, {50, 3}, {60, 0}, |
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80 | {60, 1}, {60, 2}, {60, 3}, {70, 0}, {70, 1}, |
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81 | {70, 2}, {70, 3}, { 0,64}, { 0,65}, { 0,66}, |
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82 | {10,64}, {10,65}, {10,66}, {20,64}, {20,65}, |
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83 | {20,66}, {30,64}, {30,65}, {30,66}, {40,64}, |
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84 | {40,65}, {40,66}, {50,64}, {50,65}, {50,66}, |
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85 | {60,64}, {60,65}, {60,66}, {70,64}, {70,65}, |
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86 | {70,66}, { 0,67}, {20,67}, {40,67}, {60,67}}; |
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87 | |||
88 | int i, k, m; |
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89 | int x, y, blk; |
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90 | |||
91 | for (m=0; m<5; m++) { |
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92 | switch (d->width) { |
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93 | case 1440: |
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94 | blk = (chan*11+seq)*27+slot; |
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95 | |||
96 | if (chan == 0 && seq == 11) { |
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97 | x = m*27+slot; |
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98 | if (x<90) { |
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99 | y = 0; |
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100 | } else { |
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101 | x = (x - 90)*2; |
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102 | y = 67; |
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103 | } |
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104 | } else { |
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105 | i = (4*chan + blk + off[m])%11; |
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106 | k = (blk/11)%27; |
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107 | |||
108 | x = shuf1[m] + (chan&1)*9 + k%9; |
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109 | y = (i*3+k/9)*2 + (chan>>1) + 1; |
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110 | } |
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111 | tbl[m] = (x<<1)|(y<<9); |
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112 | break; |
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113 | case 1280: |
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114 | blk = (chan*10+seq)*27+slot; |
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115 | |||
116 | i = (4*chan + (seq/5) + 2*blk + off[m])%10; |
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117 | k = (blk/5)%27; |
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118 | |||
119 | x = shuf1[m]+(chan&1)*9 + k%9; |
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120 | y = (i*3+k/9)*2 + (chan>>1) + 4; |
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121 | |||
122 | if (x >= 80) { |
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123 | x = remap[y][0]+((x-80)<<(y>59)); |
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124 | y = remap[y][1]; |
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125 | } |
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126 | tbl[m] = (x<<1)|(y<<9); |
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127 | break; |
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128 | case 960: |
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129 | blk = (chan*10+seq)*27+slot; |
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130 | |||
131 | i = (4*chan + (seq/5) + 2*blk + off[m])%10; |
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132 | k = (blk/5)%27 + (i&1)*3; |
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133 | |||
134 | x = shuf2[m] + k%6 + 6*(chan&1); |
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135 | y = l_start[i] + k/6 + 45*(chan>>1); |
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136 | tbl[m] = (x<<1)|(y<<9); |
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137 | break; |
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138 | case 720: |
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139 | switch (d->pix_fmt) { |
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140 | case AV_PIX_FMT_YUV422P: |
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141 | x = shuf3[m] + slot/3; |
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142 | y = serpent1[slot] + |
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143 | ((((seq + off[m]) % d->difseg_size)<<1) + chan)*3; |
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144 | tbl[m] = (x<<1)|(y<<8); |
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145 | break; |
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146 | case AV_PIX_FMT_YUV420P: |
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147 | x = shuf3[m] + slot/3; |
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148 | y = serpent1[slot] + |
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149 | ((seq + off[m]) % d->difseg_size)*3; |
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150 | tbl[m] = (x<<1)|(y<<9); |
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151 | break; |
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152 | case AV_PIX_FMT_YUV411P: |
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153 | i = (seq + off[m]) % d->difseg_size; |
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154 | k = slot + ((m==1||m==2)?3:0); |
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155 | |||
156 | x = l_start_shuffled[m] + k/6; |
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157 | y = serpent2[k] + i*6; |
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158 | if (x>21) |
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159 | y = y*2 - i*6; |
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160 | tbl[m] = (x<<2)|(y<<8); |
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161 | break; |
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162 | } |
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163 | default: |
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164 | break; |
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165 | } |
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166 | } |
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167 | } |
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168 | |||
169 | /* quantization quanta by QNO for DV100 */ |
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170 | static const uint8_t dv100_qstep[16] = { |
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171 | 1, /* QNO = 0 and 1 both have no quantization */ |
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172 | 1, |
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173 | 2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52 |
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174 | }; |
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175 | |||
176 | static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; |
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177 | |||
178 | int ff_dv_init_dynamic_tables(const DVprofile *d) |
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179 | { |
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180 | int j,i,c,s,p; |
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181 | uint32_t *factor1, *factor2; |
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182 | const int *iweight1, *iweight2; |
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183 | |||
184 | if (!d->work_chunks[dv_work_pool_size(d)-1].buf_offset) { |
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185 | p = i = 0; |
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186 | for (c=0; c |
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187 | for (s=0; s |
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188 | p += 6; |
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189 | for (j=0; j<27; j++) { |
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190 | p += !(j%3); |
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191 | if (!(DV_PROFILE_IS_1080i50(d) && c != 0 && s == 11) && |
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192 | !(DV_PROFILE_IS_720p50(d) && s > 9)) { |
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193 | dv_calc_mb_coordinates(d, c, s, j, &d->work_chunks[i].mb_coordinates[0]); |
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194 | d->work_chunks[i++].buf_offset = p; |
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195 | } |
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196 | p += 5; |
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197 | } |
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198 | } |
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199 | } |
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200 | } |
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201 | |||
202 | if (!d->idct_factor[DV_PROFILE_IS_HD(d)?8191:5631]) { |
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203 | factor1 = &d->idct_factor[0]; |
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204 | factor2 = &d->idct_factor[DV_PROFILE_IS_HD(d)?4096:2816]; |
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205 | if (d->height == 720) { |
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206 | iweight1 = &ff_dv_iweight_720_y[0]; |
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207 | iweight2 = &ff_dv_iweight_720_c[0]; |
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208 | } else { |
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209 | iweight1 = &ff_dv_iweight_1080_y[0]; |
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210 | iweight2 = &ff_dv_iweight_1080_c[0]; |
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211 | } |
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212 | if (DV_PROFILE_IS_HD(d)) { |
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213 | for (c = 0; c < 4; c++) { |
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214 | for (s = 0; s < 16; s++) { |
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215 | for (i = 0; i < 64; i++) { |
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216 | *factor1++ = (dv100_qstep[s] << (c + 9)) * iweight1[i]; |
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217 | *factor2++ = (dv100_qstep[s] << (c + 9)) * iweight2[i]; |
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218 | } |
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219 | } |
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220 | } |
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221 | } else { |
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222 | iweight1 = &ff_dv_iweight_88[0]; |
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223 | for (j = 0; j < 2; j++, iweight1 = &ff_dv_iweight_248[0]) { |
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224 | for (s = 0; s < 22; s++) { |
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225 | for (i = c = 0; c < 4; c++) { |
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226 | for (; i < dv_quant_areas[c]; i++) { |
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227 | *factor1 = iweight1[i] << (ff_dv_quant_shifts[s][c] + 1); |
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228 | *factor2++ = (*factor1++) << 1; |
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229 | } |
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230 | } |
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231 | } |
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232 | } |
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233 | } |
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234 | } |
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235 | |||
236 | return 0; |
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237 | } |
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238 | |||
239 | av_cold int ff_dvvideo_init(AVCodecContext *avctx) |
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240 | { |
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241 | DVVideoContext *s = avctx->priv_data; |
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242 | DSPContext dsp; |
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243 | static int done = 0; |
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244 | int i, j; |
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245 | |||
246 | if (!done) { |
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247 | VLC dv_vlc; |
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248 | uint16_t new_dv_vlc_bits[NB_DV_VLC*2]; |
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249 | uint8_t new_dv_vlc_len[NB_DV_VLC*2]; |
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250 | uint8_t new_dv_vlc_run[NB_DV_VLC*2]; |
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251 | int16_t new_dv_vlc_level[NB_DV_VLC*2]; |
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252 | |||
253 | done = 1; |
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254 | |||
255 | /* it's faster to include sign bit in a generic VLC parsing scheme */ |
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256 | for (i = 0, j = 0; i < NB_DV_VLC; i++, j++) { |
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257 | new_dv_vlc_bits[j] = dv_vlc_bits[i]; |
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258 | new_dv_vlc_len[j] = dv_vlc_len[i]; |
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259 | new_dv_vlc_run[j] = dv_vlc_run[i]; |
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260 | new_dv_vlc_level[j] = dv_vlc_level[i]; |
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261 | |||
262 | if (dv_vlc_level[i]) { |
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263 | new_dv_vlc_bits[j] <<= 1; |
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264 | new_dv_vlc_len[j]++; |
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265 | |||
266 | j++; |
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267 | new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1; |
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268 | new_dv_vlc_len[j] = dv_vlc_len[i] + 1; |
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269 | new_dv_vlc_run[j] = dv_vlc_run[i]; |
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270 | new_dv_vlc_level[j] = -dv_vlc_level[i]; |
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271 | } |
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272 | } |
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273 | |||
274 | /* NOTE: as a trick, we use the fact the no codes are unused |
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275 | to accelerate the parsing of partial codes */ |
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276 | init_vlc(&dv_vlc, TEX_VLC_BITS, j, |
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277 | new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); |
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278 | av_assert1(dv_vlc.table_size == 1184); |
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279 | |||
280 | for (i = 0; i < dv_vlc.table_size; i++){ |
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281 | int code = dv_vlc.table[i][0]; |
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282 | int len = dv_vlc.table[i][1]; |
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283 | int level, run; |
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284 | |||
285 | if (len < 0){ //more bits needed |
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286 | run = 0; |
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287 | level = code; |
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288 | } else { |
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289 | run = new_dv_vlc_run [code] + 1; |
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290 | level = new_dv_vlc_level[code]; |
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291 | } |
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292 | ff_dv_rl_vlc[i].len = len; |
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293 | ff_dv_rl_vlc[i].level = level; |
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294 | ff_dv_rl_vlc[i].run = run; |
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295 | } |
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296 | ff_free_vlc(&dv_vlc); |
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297 | } |
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298 | |||
299 | /* Generic DSP setup */ |
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300 | memset(&dsp,0, sizeof(dsp)); |
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301 | ff_dsputil_init(&dsp, avctx); |
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302 | ff_set_cmp(&dsp, dsp.ildct_cmp, avctx->ildct_cmp); |
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303 | s->get_pixels = dsp.get_pixels; |
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304 | s->ildct_cmp = dsp.ildct_cmp[5]; |
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305 | |||
306 | /* 88DCT setup */ |
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307 | s->fdct[0] = dsp.fdct; |
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308 | s->idct_put[0] = dsp.idct_put; |
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309 | for (i = 0; i < 64; i++) |
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310 | s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]]; |
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311 | |||
312 | /* 248DCT setup */ |
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313 | s->fdct[1] = dsp.fdct248; |
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314 | s->idct_put[1] = ff_simple_idct248_put; // FIXME: need to add it to DSP |
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315 | if (avctx->lowres){ |
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316 | for (i = 0; i < 64; i++){ |
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317 | int j = ff_zigzag248_direct[i]; |
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318 | s->dv_zigzag[1][i] = dsp.idct_permutation[(j & 7) + (j & 8) * 4 + (j & 48) / 2]; |
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319 | } |
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320 | }else |
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321 | memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64); |
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322 | |||
323 | avcodec_get_frame_defaults(&s->picture); |
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324 | avctx->coded_frame = &s->picture; |
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325 | s->avctx = avctx; |
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326 | avctx->chroma_sample_location = AVCHROMA_LOC_TOPLEFT; |
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327 | |||
328 | return 0; |
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329 | } |
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330 | |||
331 | static av_cold int dvvideo_init_encoder(AVCodecContext *avctx) |
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332 | { |
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333 | if (!avpriv_dv_codec_profile(avctx)) { |
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334 | av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. " |
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335 | "Valid DV profiles are:\n", |
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336 | avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt)); |
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337 | ff_dv_print_profiles(avctx, AV_LOG_ERROR); |
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338 | return AVERROR(EINVAL); |
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339 | } |
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340 | if (avctx->height > 576) { |
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341 | av_log(avctx, AV_LOG_ERROR, "DVCPRO HD encoding is not supported.\n"); |
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342 | return AVERROR_PATCHWELCOME; |
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343 | } |
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344 | |||
345 | dv_vlc_map_tableinit(); |
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346 | |||
347 | return ff_dvvideo_init(avctx); |
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348 | } |
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349 | |||
350 | /* bit budget for AC only in 5 MBs */ |
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351 | static const int vs_total_ac_bits = (100 * 4 + 68*2) * 5; |
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352 | static const int mb_area_start[5] = { 1, 6, 21, 43, 64 }; |
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353 | |||
354 | #if CONFIG_SMALL |
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355 | /* Converts run and level (where level != 0) pair into VLC, returning bit size */ |
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356 | static av_always_inline int dv_rl2vlc(int run, int level, int sign, uint32_t* vlc) |
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357 | { |
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358 | int size; |
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359 | if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { |
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360 | *vlc = dv_vlc_map[run][level].vlc | sign; |
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361 | size = dv_vlc_map[run][level].size; |
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362 | } |
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363 | else { |
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364 | if (level < DV_VLC_MAP_LEV_SIZE) { |
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365 | *vlc = dv_vlc_map[0][level].vlc | sign; |
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366 | size = dv_vlc_map[0][level].size; |
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367 | } else { |
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368 | *vlc = 0xfe00 | (level << 1) | sign; |
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369 | size = 16; |
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370 | } |
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371 | if (run) { |
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372 | *vlc |= ((run < 16) ? dv_vlc_map[run-1][0].vlc : |
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373 | (0x1f80 | (run - 1))) << size; |
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374 | size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; |
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375 | } |
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376 | } |
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377 | |||
378 | return size; |
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379 | } |
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380 | |||
381 | static av_always_inline int dv_rl2vlc_size(int run, int level) |
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382 | { |
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383 | int size; |
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384 | |||
385 | if (run < DV_VLC_MAP_RUN_SIZE && level < DV_VLC_MAP_LEV_SIZE) { |
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386 | size = dv_vlc_map[run][level].size; |
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387 | } |
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388 | else { |
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389 | size = (level < DV_VLC_MAP_LEV_SIZE) ? dv_vlc_map[0][level].size : 16; |
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390 | if (run) { |
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391 | size += (run < 16) ? dv_vlc_map[run-1][0].size : 13; |
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392 | } |
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393 | } |
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394 | return size; |
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395 | } |
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396 | #else |
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397 | static av_always_inline int dv_rl2vlc(int run, int l, int sign, uint32_t* vlc) |
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398 | { |
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399 | *vlc = dv_vlc_map[run][l].vlc | sign; |
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400 | return dv_vlc_map[run][l].size; |
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401 | } |
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402 | |||
403 | static av_always_inline int dv_rl2vlc_size(int run, int l) |
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404 | { |
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405 | return dv_vlc_map[run][l].size; |
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406 | } |
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407 | #endif |
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408 | |||
409 | typedef struct EncBlockInfo { |
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410 | int area_q[4]; |
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411 | int bit_size[4]; |
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412 | int prev[5]; |
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413 | int cur_ac; |
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414 | int cno; |
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415 | int dct_mode; |
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416 | int16_t mb[64]; |
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417 | uint8_t next[64]; |
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418 | uint8_t sign[64]; |
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419 | uint8_t partial_bit_count; |
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420 | uint32_t partial_bit_buffer; /* we can't use uint16_t here */ |
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421 | } EncBlockInfo; |
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422 | |||
423 | static av_always_inline PutBitContext* dv_encode_ac(EncBlockInfo* bi, |
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424 | PutBitContext* pb_pool, |
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425 | PutBitContext* pb_end) |
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426 | { |
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427 | int prev, bits_left; |
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428 | PutBitContext* pb = pb_pool; |
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429 | int size = bi->partial_bit_count; |
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430 | uint32_t vlc = bi->partial_bit_buffer; |
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431 | |||
432 | bi->partial_bit_count = bi->partial_bit_buffer = 0; |
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433 | for (;;){ |
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434 | /* Find suitable storage space */ |
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435 | for (; size > (bits_left = put_bits_left(pb)); pb++) { |
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436 | if (bits_left) { |
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437 | size -= bits_left; |
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438 | put_bits(pb, bits_left, vlc >> size); |
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439 | vlc = vlc & ((1 << size) - 1); |
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440 | } |
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441 | if (pb + 1 >= pb_end) { |
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442 | bi->partial_bit_count = size; |
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443 | bi->partial_bit_buffer = vlc; |
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444 | return pb; |
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445 | } |
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446 | } |
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447 | |||
448 | /* Store VLC */ |
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449 | put_bits(pb, size, vlc); |
||
450 | |||
451 | if (bi->cur_ac >= 64) |
||
452 | break; |
||
453 | |||
454 | /* Construct the next VLC */ |
||
455 | prev = bi->cur_ac; |
||
456 | bi->cur_ac = bi->next[prev]; |
||
457 | if (bi->cur_ac < 64){ |
||
458 | size = dv_rl2vlc(bi->cur_ac - prev - 1, bi->mb[bi->cur_ac], bi->sign[bi->cur_ac], &vlc); |
||
459 | } else { |
||
460 | size = 4; vlc = 6; /* End Of Block stamp */ |
||
461 | } |
||
462 | } |
||
463 | return pb; |
||
464 | } |
||
465 | |||
466 | static av_always_inline int dv_guess_dct_mode(DVVideoContext *s, uint8_t *data, int linesize) { |
||
467 | if (s->avctx->flags & CODEC_FLAG_INTERLACED_DCT) { |
||
468 | int ps = s->ildct_cmp(NULL, data, NULL, linesize, 8) - 400; |
||
469 | if (ps > 0) { |
||
470 | int is = s->ildct_cmp(NULL, data , NULL, linesize<<1, 4) + |
||
471 | s->ildct_cmp(NULL, data + linesize, NULL, linesize<<1, 4); |
||
472 | return ps > is; |
||
473 | } |
||
474 | } |
||
475 | |||
476 | return 0; |
||
477 | } |
||
478 | |||
479 | static const int dv_weight_bits = 18; |
||
480 | static const int dv_weight_88[64] = { |
||
481 | 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536, |
||
482 | 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935, |
||
483 | 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916, |
||
484 | 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433, |
||
485 | 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704, |
||
486 | 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568, |
||
487 | 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627, |
||
488 | 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258, |
||
489 | }; |
||
490 | static const int dv_weight_248[64] = { |
||
491 | 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754, |
||
492 | 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536, |
||
493 | 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568, |
||
494 | 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965, |
||
495 | 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627, |
||
496 | 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965, |
||
497 | 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364, |
||
498 | 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651, |
||
499 | }; |
||
500 | |||
501 | static av_always_inline int dv_init_enc_block(EncBlockInfo* bi, uint8_t *data, int linesize, DVVideoContext *s, int bias) |
||
502 | { |
||
503 | const int *weight; |
||
504 | const uint8_t* zigzag_scan; |
||
505 | LOCAL_ALIGNED_16(int16_t, blk, [64]); |
||
506 | int i, area; |
||
507 | /* We offer two different methods for class number assignment: the |
||
508 | method suggested in SMPTE 314M Table 22, and an improved |
||
509 | method. The SMPTE method is very conservative; it assigns class |
||
510 | 3 (i.e. severe quantization) to any block where the largest AC |
||
511 | component is greater than 36. FFmpeg's DV encoder tracks AC bit |
||
512 | consumption precisely, so there is no need to bias most blocks |
||
513 | towards strongly lossy compression. Instead, we assign class 2 |
||
514 | to most blocks, and use class 3 only when strictly necessary |
||
515 | (for blocks whose largest AC component exceeds 255). */ |
||
516 | |||
517 | #if 0 /* SMPTE spec method */ |
||
518 | static const int classes[] = {12, 24, 36, 0xffff}; |
||
519 | #else /* improved FFmpeg method */ |
||
520 | static const int classes[] = {-1, -1, 255, 0xffff}; |
||
521 | #endif |
||
522 | int max = classes[0]; |
||
523 | int prev = 0; |
||
524 | |||
525 | av_assert2((((int)blk) & 15) == 0); |
||
526 | |||
527 | bi->area_q[0] = bi->area_q[1] = bi->area_q[2] = bi->area_q[3] = 0; |
||
528 | bi->partial_bit_count = 0; |
||
529 | bi->partial_bit_buffer = 0; |
||
530 | bi->cur_ac = 0; |
||
531 | if (data) { |
||
532 | bi->dct_mode = dv_guess_dct_mode(s, data, linesize); |
||
533 | s->get_pixels(blk, data, linesize); |
||
534 | s->fdct[bi->dct_mode](blk); |
||
535 | } else { |
||
536 | /* We rely on the fact that encoding all zeros leads to an immediate EOB, |
||
537 | which is precisely what the spec calls for in the "dummy" blocks. */ |
||
538 | memset(blk, 0, 64*sizeof(*blk)); |
||
539 | bi->dct_mode = 0; |
||
540 | } |
||
541 | bi->mb[0] = blk[0]; |
||
542 | |||
543 | zigzag_scan = bi->dct_mode ? ff_zigzag248_direct : ff_zigzag_direct; |
||
544 | weight = bi->dct_mode ? dv_weight_248 : dv_weight_88; |
||
545 | |||
546 | for (area = 0; area < 4; area++) { |
||
547 | bi->prev[area] = prev; |
||
548 | bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
||
549 | for (i = mb_area_start[area]; i < mb_area_start[area+1]; i++) { |
||
550 | int level = blk[zigzag_scan[i]]; |
||
551 | |||
552 | if (level + 15 > 30U) { |
||
553 | bi->sign[i] = (level >> 31) & 1; |
||
554 | /* weight it and shift down into range, adding for rounding */ |
||
555 | /* the extra division by a factor of 2^4 reverses the 8x expansion of the DCT |
||
556 | AND the 2x doubling of the weights */ |
||
557 | level = (FFABS(level) * weight[i] + (1 << (dv_weight_bits+3))) >> (dv_weight_bits+4); |
||
558 | bi->mb[i] = level; |
||
559 | if (level > max) |
||
560 | max = level; |
||
561 | bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, level); |
||
562 | bi->next[prev]= i; |
||
563 | prev = i; |
||
564 | } |
||
565 | } |
||
566 | } |
||
567 | bi->next[prev]= i; |
||
568 | for (bi->cno = 0; max > classes[bi->cno]; bi->cno++); |
||
569 | |||
570 | bi->cno += bias; |
||
571 | |||
572 | if (bi->cno >= 3) { |
||
573 | bi->cno = 3; |
||
574 | prev = 0; |
||
575 | i = bi->next[prev]; |
||
576 | for (area = 0; area < 4; area++) { |
||
577 | bi->prev[area] = prev; |
||
578 | bi->bit_size[area] = 1; // 4 areas 4 bits for EOB :) |
||
579 | for (; i < mb_area_start[area+1]; i = bi->next[i]) { |
||
580 | bi->mb[i] >>= 1; |
||
581 | |||
582 | if (bi->mb[i]) { |
||
583 | bi->bit_size[area] += dv_rl2vlc_size(i - prev - 1, bi->mb[i]); |
||
584 | bi->next[prev]= i; |
||
585 | prev = i; |
||
586 | } |
||
587 | } |
||
588 | } |
||
589 | bi->next[prev]= i; |
||
590 | } |
||
591 | |||
592 | return bi->bit_size[0] + bi->bit_size[1] + bi->bit_size[2] + bi->bit_size[3]; |
||
593 | } |
||
594 | |||
595 | static inline void dv_guess_qnos(EncBlockInfo* blks, int* qnos) |
||
596 | { |
||
597 | int size[5]; |
||
598 | int i, j, k, a, prev, a2; |
||
599 | EncBlockInfo* b; |
||
600 | |||
601 | size[0] = size[1] = size[2] = size[3] = size[4] = 1 << 24; |
||
602 | do { |
||
603 | b = blks; |
||
604 | for (i = 0; i < 5; i++) { |
||
605 | if (!qnos[i]) |
||
606 | continue; |
||
607 | |||
608 | qnos[i]--; |
||
609 | size[i] = 0; |
||
610 | for (j = 0; j < 6; j++, b++) { |
||
611 | for (a = 0; a < 4; a++) { |
||
612 | if (b->area_q[a] != ff_dv_quant_shifts[qnos[i] + ff_dv_quant_offset[b->cno]][a]) { |
||
613 | b->bit_size[a] = 1; // 4 areas 4 bits for EOB :) |
||
614 | b->area_q[a]++; |
||
615 | prev = b->prev[a]; |
||
616 | av_assert2(b->next[prev] >= mb_area_start[a+1] || b->mb[prev]); |
||
617 | for (k = b->next[prev] ; k < mb_area_start[a+1]; k = b->next[k]) { |
||
618 | b->mb[k] >>= 1; |
||
619 | if (b->mb[k]) { |
||
620 | b->bit_size[a] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
||
621 | prev = k; |
||
622 | } else { |
||
623 | if (b->next[k] >= mb_area_start[a+1] && b->next[k]<64){ |
||
624 | for (a2 = a + 1; b->next[k] >= mb_area_start[a2+1]; a2++) |
||
625 | b->prev[a2] = prev; |
||
626 | av_assert2(a2 < 4); |
||
627 | av_assert2(b->mb[b->next[k]]); |
||
628 | b->bit_size[a2] += dv_rl2vlc_size(b->next[k] - prev - 1, b->mb[b->next[k]]) |
||
629 | -dv_rl2vlc_size(b->next[k] - k - 1, b->mb[b->next[k]]); |
||
630 | av_assert2(b->prev[a2] == k && (a2 + 1 >= 4 || b->prev[a2+1] != k)); |
||
631 | b->prev[a2] = prev; |
||
632 | } |
||
633 | b->next[prev] = b->next[k]; |
||
634 | } |
||
635 | } |
||
636 | b->prev[a+1]= prev; |
||
637 | } |
||
638 | size[i] += b->bit_size[a]; |
||
639 | } |
||
640 | } |
||
641 | if (vs_total_ac_bits >= size[0] + size[1] + size[2] + size[3] + size[4]) |
||
642 | return; |
||
643 | } |
||
644 | } while (qnos[0]|qnos[1]|qnos[2]|qnos[3]|qnos[4]); |
||
645 | |||
646 | |||
647 | for (a = 2; a == 2 || vs_total_ac_bits < size[0]; a += a){ |
||
648 | b = blks; |
||
649 | size[0] = 5 * 6 * 4; //EOB |
||
650 | for (j = 0; j < 6 *5; j++, b++) { |
||
651 | prev = b->prev[0]; |
||
652 | for (k = b->next[prev]; k < 64; k = b->next[k]) { |
||
653 | if (b->mb[k] < a && b->mb[k] > -a){ |
||
654 | b->next[prev] = b->next[k]; |
||
655 | }else{ |
||
656 | size[0] += dv_rl2vlc_size(k - prev - 1, b->mb[k]); |
||
657 | prev = k; |
||
658 | } |
||
659 | } |
||
660 | } |
||
661 | } |
||
662 | } |
||
663 | |||
664 | static int dv_encode_video_segment(AVCodecContext *avctx, void *arg) |
||
665 | { |
||
666 | DVVideoContext *s = avctx->priv_data; |
||
667 | DVwork_chunk *work_chunk = arg; |
||
668 | int mb_index, i, j; |
||
669 | int mb_x, mb_y, c_offset, linesize, y_stride; |
||
670 | uint8_t* y_ptr; |
||
671 | uint8_t* dif; |
||
672 | LOCAL_ALIGNED_8(uint8_t, scratch, [128]); |
||
673 | EncBlockInfo enc_blks[5*DV_MAX_BPM]; |
||
674 | PutBitContext pbs[5*DV_MAX_BPM]; |
||
675 | PutBitContext* pb; |
||
676 | EncBlockInfo* enc_blk; |
||
677 | int vs_bit_size = 0; |
||
678 | int qnos[5] = {15, 15, 15, 15, 15}; /* No quantization */ |
||
679 | int* qnosp = &qnos[0]; |
||
680 | |||
681 | dif = &s->buf[work_chunk->buf_offset*80]; |
||
682 | enc_blk = &enc_blks[0]; |
||
683 | for (mb_index = 0; mb_index < 5; mb_index++) { |
||
684 | dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y); |
||
685 | |||
686 | /* initializing luminance blocks */ |
||
687 | if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) || |
||
688 | (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) || |
||
689 | (s->sys->height >= 720 && mb_y != 134)) { |
||
690 | y_stride = s->picture.linesize[0] << 3; |
||
691 | } else { |
||
692 | y_stride = 16; |
||
693 | } |
||
694 | y_ptr = s->picture.data[0] + ((mb_y * s->picture.linesize[0] + mb_x) << 3); |
||
695 | linesize = s->picture.linesize[0]; |
||
696 | |||
697 | if (s->sys->video_stype == 4) { /* SD 422 */ |
||
698 | vs_bit_size += |
||
699 | dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) + |
||
700 | dv_init_enc_block(enc_blk+1, NULL , linesize, s, 0) + |
||
701 | dv_init_enc_block(enc_blk+2, y_ptr + 8 , linesize, s, 0) + |
||
702 | dv_init_enc_block(enc_blk+3, NULL , linesize, s, 0); |
||
703 | } else { |
||
704 | vs_bit_size += |
||
705 | dv_init_enc_block(enc_blk+0, y_ptr , linesize, s, 0) + |
||
706 | dv_init_enc_block(enc_blk+1, y_ptr + 8 , linesize, s, 0) + |
||
707 | dv_init_enc_block(enc_blk+2, y_ptr + y_stride, linesize, s, 0) + |
||
708 | dv_init_enc_block(enc_blk+3, y_ptr + 8 + y_stride, linesize, s, 0); |
||
709 | } |
||
710 | enc_blk += 4; |
||
711 | |||
712 | /* initializing chrominance blocks */ |
||
713 | c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->picture.linesize[1] + |
||
714 | (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << 3); |
||
715 | for (j = 2; j; j--) { |
||
716 | uint8_t *c_ptr = s->picture.data[j] + c_offset; |
||
717 | linesize = s->picture.linesize[j]; |
||
718 | y_stride = (mb_y == 134) ? 8 : (s->picture.linesize[j] << 3); |
||
719 | if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) { |
||
720 | uint8_t* d; |
||
721 | uint8_t* b = scratch; |
||
722 | for (i = 0; i < 8; i++) { |
||
723 | d = c_ptr + (linesize << 3); |
||
724 | b[0] = c_ptr[0]; b[1] = c_ptr[1]; b[2] = c_ptr[2]; b[3] = c_ptr[3]; |
||
725 | b[4] = d[0]; b[5] = d[1]; b[6] = d[2]; b[7] = d[3]; |
||
726 | c_ptr += linesize; |
||
727 | b += 16; |
||
728 | } |
||
729 | c_ptr = scratch; |
||
730 | linesize = 16; |
||
731 | } |
||
732 | |||
733 | vs_bit_size += dv_init_enc_block( enc_blk++, c_ptr , linesize, s, 1); |
||
734 | if (s->sys->bpm == 8) { |
||
735 | vs_bit_size += dv_init_enc_block(enc_blk++, c_ptr + y_stride, linesize, s, 1); |
||
736 | } |
||
737 | } |
||
738 | } |
||
739 | |||
740 | if (vs_total_ac_bits < vs_bit_size) |
||
741 | dv_guess_qnos(&enc_blks[0], qnosp); |
||
742 | |||
743 | /* DIF encoding process */ |
||
744 | for (j=0; j<5*s->sys->bpm;) { |
||
745 | int start_mb = j; |
||
746 | |||
747 | dif[3] = *qnosp++; |
||
748 | dif += 4; |
||
749 | |||
750 | /* First pass over individual cells only */ |
||
751 | for (i=0; i |
||
752 | int sz = s->sys->block_sizes[i]>>3; |
||
753 | |||
754 | init_put_bits(&pbs[j], dif, sz); |
||
755 | put_sbits(&pbs[j], 9, ((enc_blks[j].mb[0] >> 3) - 1024 + 2) >> 2); |
||
756 | put_bits(&pbs[j], 1, enc_blks[j].dct_mode); |
||
757 | put_bits(&pbs[j], 2, enc_blks[j].cno); |
||
758 | |||
759 | dv_encode_ac(&enc_blks[j], &pbs[j], &pbs[j+1]); |
||
760 | dif += sz; |
||
761 | } |
||
762 | |||
763 | /* Second pass over each MB space */ |
||
764 | pb = &pbs[start_mb]; |
||
765 | for (i=0; i |
||
766 | if (enc_blks[start_mb+i].partial_bit_count) |
||
767 | pb = dv_encode_ac(&enc_blks[start_mb+i], pb, &pbs[start_mb+s->sys->bpm]); |
||
768 | } |
||
769 | } |
||
770 | |||
771 | /* Third and final pass over the whole video segment space */ |
||
772 | pb = &pbs[0]; |
||
773 | for (j=0; j<5*s->sys->bpm; j++) { |
||
774 | if (enc_blks[j].partial_bit_count) |
||
775 | pb = dv_encode_ac(&enc_blks[j], pb, &pbs[s->sys->bpm*5]); |
||
776 | if (enc_blks[j].partial_bit_count) |
||
777 | av_log(avctx, AV_LOG_ERROR, "ac bitstream overflow\n"); |
||
778 | } |
||
779 | |||
780 | for (j=0; j<5*s->sys->bpm; j++) { |
||
781 | int pos; |
||
782 | int size = pbs[j].size_in_bits >> 3; |
||
783 | flush_put_bits(&pbs[j]); |
||
784 | pos = put_bits_count(&pbs[j]) >> 3; |
||
785 | if (pos > size) { |
||
786 | av_log(avctx, AV_LOG_ERROR, "bitstream written beyond buffer size\n"); |
||
787 | return -1; |
||
788 | } |
||
789 | memset(pbs[j].buf + pos, 0xff, size - pos); |
||
790 | } |
||
791 | |||
792 | return 0; |
||
793 | } |
||
794 | |||
795 | static inline int dv_write_pack(enum dv_pack_type pack_id, DVVideoContext *c, |
||
796 | uint8_t* buf) |
||
797 | { |
||
798 | /* |
||
799 | * Here's what SMPTE314M says about these two: |
||
800 | * (page 6) APTn, AP1n, AP2n, AP3n: These data shall be identical |
||
801 | * as track application IDs (APTn = 001, AP1n = |
||
802 | * 001, AP2n = 001, AP3n = 001), if the source signal |
||
803 | * comes from a digital VCR. If the signal source is |
||
804 | * unknown, all bits for these data shall be set to 1. |
||
805 | * (page 12) STYPE: STYPE defines a signal type of video signal |
||
806 | * 00000b = 4:1:1 compression |
||
807 | * 00100b = 4:2:2 compression |
||
808 | * XXXXXX = Reserved |
||
809 | * Now, I've got two problems with these statements: |
||
810 | * 1. it looks like APT == 111b should be a safe bet, but it isn't. |
||
811 | * It seems that for PAL as defined in IEC 61834 we have to set |
||
812 | * APT to 000 and for SMPTE314M to 001. |
||
813 | * 2. It is not at all clear what STYPE is used for 4:2:0 PAL |
||
814 | * compression scheme (if any). |
||
815 | */ |
||
816 | int apt = (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0 : 1); |
||
817 | int fs = c->picture.top_field_first ? 0x00 : 0x40; |
||
818 | |||
819 | uint8_t aspect = 0; |
||
820 | if ((int)(av_q2d(c->avctx->sample_aspect_ratio) * c->avctx->width / c->avctx->height * 10) >= 17) /* 16:9 */ |
||
821 | aspect = 0x02; |
||
822 | |||
823 | buf[0] = (uint8_t)pack_id; |
||
824 | switch (pack_id) { |
||
825 | case dv_header525: /* I can't imagine why these two weren't defined as real */ |
||
826 | case dv_header625: /* packs in SMPTE314M -- they definitely look like ones */ |
||
827 | buf[1] = 0xf8 | /* reserved -- always 1 */ |
||
828 | (apt & 0x07); /* APT: Track application ID */ |
||
829 | buf[2] = (0 << 7) | /* TF1: audio data is 0 - valid; 1 - invalid */ |
||
830 | (0x0f << 3) | /* reserved -- always 1 */ |
||
831 | (apt & 0x07); /* AP1: Audio application ID */ |
||
832 | buf[3] = (0 << 7) | /* TF2: video data is 0 - valid; 1 - invalid */ |
||
833 | (0x0f << 3) | /* reserved -- always 1 */ |
||
834 | (apt & 0x07); /* AP2: Video application ID */ |
||
835 | buf[4] = (0 << 7) | /* TF3: subcode(SSYB) is 0 - valid; 1 - invalid */ |
||
836 | (0x0f << 3) | /* reserved -- always 1 */ |
||
837 | (apt & 0x07); /* AP3: Subcode application ID */ |
||
838 | break; |
||
839 | case dv_video_source: |
||
840 | buf[1] = 0xff; /* reserved -- always 1 */ |
||
841 | buf[2] = (1 << 7) | /* B/W: 0 - b/w, 1 - color */ |
||
842 | (1 << 6) | /* following CLF is valid - 0, invalid - 1 */ |
||
843 | (3 << 4) | /* CLF: color frames ID (see ITU-R BT.470-4) */ |
||
844 | 0xf; /* reserved -- always 1 */ |
||
845 | buf[3] = (3 << 6) | /* reserved -- always 1 */ |
||
846 | (c->sys->dsf << 5) | /* system: 60fields/50fields */ |
||
847 | c->sys->video_stype; /* signal type video compression */ |
||
848 | buf[4] = 0xff; /* VISC: 0xff -- no information */ |
||
849 | break; |
||
850 | case dv_video_control: |
||
851 | buf[1] = (0 << 6) | /* Copy generation management (CGMS) 0 -- free */ |
||
852 | 0x3f; /* reserved -- always 1 */ |
||
853 | buf[2] = 0xc8 | /* reserved -- always b11001xxx */ |
||
854 | aspect; |
||
855 | buf[3] = (1 << 7) | /* frame/field flag 1 -- frame, 0 -- field */ |
||
856 | fs | /* first/second field flag 0 -- field 2, 1 -- field 1 */ |
||
857 | (1 << 5) | /* frame change flag 0 -- same picture as before, 1 -- different */ |
||
858 | (1 << 4) | /* 1 - interlaced, 0 - noninterlaced */ |
||
859 | 0xc; /* reserved -- always b1100 */ |
||
860 | buf[4] = 0xff; /* reserved -- always 1 */ |
||
861 | break; |
||
862 | default: |
||
863 | buf[1] = buf[2] = buf[3] = buf[4] = 0xff; |
||
864 | } |
||
865 | return 5; |
||
866 | } |
||
867 | |||
868 | #if CONFIG_DVVIDEO_ENCODER |
||
869 | static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num, |
||
870 | uint8_t seq_num, uint8_t dif_num, |
||
871 | uint8_t* buf) |
||
872 | { |
||
873 | buf[0] = (uint8_t)t; /* Section type */ |
||
874 | buf[1] = (seq_num << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */ |
||
875 | (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */ |
||
876 | 7; /* reserved -- always 1 */ |
||
877 | buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */ |
||
878 | return 3; |
||
879 | } |
||
880 | |||
881 | |||
882 | static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf) |
||
883 | { |
||
884 | if (syb_num == 0 || syb_num == 6) { |
||
885 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
||
886 | (0 << 4) | /* AP3 (Subcode application ID) */ |
||
887 | 0x0f; /* reserved -- always 1 */ |
||
888 | } |
||
889 | else if (syb_num == 11) { |
||
890 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
||
891 | 0x7f; /* reserved -- always 1 */ |
||
892 | } |
||
893 | else { |
||
894 | buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
||
895 | (0 << 4) | /* APT (Track application ID) */ |
||
896 | 0x0f; /* reserved -- always 1 */ |
||
897 | } |
||
898 | buf[1] = 0xf0 | /* reserved -- always 1 */ |
||
899 | (syb_num & 0x0f); /* SSYB number 0 - 11 */ |
||
900 | buf[2] = 0xff; /* reserved -- always 1 */ |
||
901 | return 3; |
||
902 | } |
||
903 | |||
904 | static void dv_format_frame(DVVideoContext* c, uint8_t* buf) |
||
905 | { |
||
906 | int chan, i, j, k; |
||
907 | |||
908 | for (chan = 0; chan < c->sys->n_difchan; chan++) { |
||
909 | for (i = 0; i < c->sys->difseg_size; i++) { |
||
910 | memset(buf, 0xff, 80 * 6); /* first 6 DIF blocks are for control data */ |
||
911 | |||
912 | /* DV header: 1DIF */ |
||
913 | buf += dv_write_dif_id(dv_sect_header, chan, i, 0, buf); |
||
914 | buf += dv_write_pack((c->sys->dsf ? dv_header625 : dv_header525), c, buf); |
||
915 | buf += 72; /* unused bytes */ |
||
916 | |||
917 | /* DV subcode: 2DIFs */ |
||
918 | for (j = 0; j < 2; j++) { |
||
919 | buf += dv_write_dif_id(dv_sect_subcode, chan, i, j, buf); |
||
920 | for (k = 0; k < 6; k++) |
||
921 | buf += dv_write_ssyb_id(k, (i < c->sys->difseg_size/2), buf) + 5; |
||
922 | buf += 29; /* unused bytes */ |
||
923 | } |
||
924 | |||
925 | /* DV VAUX: 3DIFS */ |
||
926 | for (j = 0; j < 3; j++) { |
||
927 | buf += dv_write_dif_id(dv_sect_vaux, chan, i, j, buf); |
||
928 | buf += dv_write_pack(dv_video_source, c, buf); |
||
929 | buf += dv_write_pack(dv_video_control, c, buf); |
||
930 | buf += 7*5; |
||
931 | buf += dv_write_pack(dv_video_source, c, buf); |
||
932 | buf += dv_write_pack(dv_video_control, c, buf); |
||
933 | buf += 4*5 + 2; /* unused bytes */ |
||
934 | } |
||
935 | |||
936 | /* DV Audio/Video: 135 Video DIFs + 9 Audio DIFs */ |
||
937 | for (j = 0; j < 135; j++) { |
||
938 | if (j%15 == 0) { |
||
939 | memset(buf, 0xff, 80); |
||
940 | buf += dv_write_dif_id(dv_sect_audio, chan, i, j/15, buf); |
||
941 | buf += 77; /* audio control & shuffled PCM audio */ |
||
942 | } |
||
943 | buf += dv_write_dif_id(dv_sect_video, chan, i, j, buf); |
||
944 | buf += 77; /* 1 video macroblock: 1 bytes control |
||
945 | 4 * 14 bytes Y 8x8 data |
||
946 | 10 bytes Cr 8x8 data |
||
947 | 10 bytes Cb 8x8 data */ |
||
948 | } |
||
949 | } |
||
950 | } |
||
951 | } |
||
952 | |||
953 | |||
954 | static int dvvideo_encode_frame(AVCodecContext *c, AVPacket *pkt, |
||
955 | const AVFrame *frame, int *got_packet) |
||
956 | { |
||
957 | DVVideoContext *s = c->priv_data; |
||
958 | int ret; |
||
959 | |||
960 | s->sys = avpriv_dv_codec_profile(c); |
||
961 | if (!s->sys || ff_dv_init_dynamic_tables(s->sys)) |
||
962 | return -1; |
||
963 | if ((ret = ff_alloc_packet2(c, pkt, s->sys->frame_size)) < 0) |
||
964 | return ret; |
||
965 | |||
966 | c->pix_fmt = s->sys->pix_fmt; |
||
967 | s->picture = *frame; |
||
968 | s->picture.key_frame = 1; |
||
969 | s->picture.pict_type = AV_PICTURE_TYPE_I; |
||
970 | |||
971 | s->buf = pkt->data; |
||
972 | c->execute(c, dv_encode_video_segment, s->sys->work_chunks, NULL, |
||
973 | dv_work_pool_size(s->sys), sizeof(DVwork_chunk)); |
||
974 | |||
975 | emms_c(); |
||
976 | |||
977 | dv_format_frame(s, pkt->data); |
||
978 | |||
979 | pkt->flags |= AV_PKT_FLAG_KEY; |
||
980 | *got_packet = 1; |
||
981 | |||
982 | return 0; |
||
983 | } |
||
984 | |||
985 | AVCodec ff_dvvideo_encoder = { |
||
986 | .name = "dvvideo", |
||
987 | .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"), |
||
988 | .type = AVMEDIA_TYPE_VIDEO, |
||
989 | .id = AV_CODEC_ID_DVVIDEO, |
||
990 | .priv_data_size = sizeof(DVVideoContext), |
||
991 | .init = dvvideo_init_encoder, |
||
992 | .encode2 = dvvideo_encode_frame, |
||
993 | .capabilities = CODEC_CAP_SLICE_THREADS, |
||
994 | .pix_fmts = (const enum AVPixelFormat[]) { |
||
995 | AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE |
||
996 | }, |
||
997 | }; |
||
998 | #endif // CONFIG_DVVIDEO_ENCODER>>>>>>>>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>><>5*s->5*s->5*s->>><>>><>><>><>><>>>>>>>64){ |