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4349 | Serge | 1 | /* |
2 | * Copyright (c) 2003 Michael Niedermayer |
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3 | * |
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4 | * This file is part of FFmpeg. |
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5 | * |
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6 | * FFmpeg is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2.1 of the License, or (at your option) any later version. |
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10 | * |
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11 | * FFmpeg is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with FFmpeg; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
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20 | |||
21 | /** |
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22 | * @file |
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23 | * ASUS V1/V2 encoder. |
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24 | */ |
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25 | |||
26 | #include "libavutil/attributes.h" |
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27 | #include "libavutil/mem.h" |
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28 | |||
29 | #include "asv.h" |
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30 | #include "avcodec.h" |
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31 | #include "internal.h" |
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32 | #include "mathops.h" |
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33 | #include "mpeg12data.h" |
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34 | |||
35 | static inline void asv2_put_bits(PutBitContext *pb, int n, int v){ |
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36 | put_bits(pb, n, ff_reverse[ v << (8-n) ]); |
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37 | } |
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38 | |||
39 | static inline void asv1_put_level(PutBitContext *pb, int level){ |
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40 | unsigned int index= level + 3; |
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41 | |||
42 | if(index <= 6) put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]); |
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43 | else{ |
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44 | put_bits(pb, ff_asv_level_tab[3][1], ff_asv_level_tab[3][0]); |
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45 | put_sbits(pb, 8, level); |
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46 | } |
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47 | } |
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48 | |||
49 | static inline void asv2_put_level(PutBitContext *pb, int level){ |
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50 | unsigned int index= level + 31; |
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51 | |||
52 | if(index <= 62) put_bits(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]); |
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53 | else{ |
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54 | put_bits(pb, ff_asv2_level_tab[31][1], ff_asv2_level_tab[31][0]); |
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55 | asv2_put_bits(pb, 8, level&0xFF); |
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56 | } |
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57 | } |
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58 | |||
59 | static inline void asv1_encode_block(ASV1Context *a, int16_t block[64]){ |
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60 | int i; |
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61 | int nc_count=0; |
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62 | |||
63 | put_bits(&a->pb, 8, (block[0] + 32)>>6); |
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64 | block[0]= 0; |
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65 | |||
66 | for(i=0; i<10; i++){ |
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67 | const int index = ff_asv_scantab[4*i]; |
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68 | int ccp=0; |
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69 | |||
70 | if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; |
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71 | if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; |
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72 | if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; |
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73 | if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; |
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74 | |||
75 | if(ccp){ |
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76 | for(;nc_count; nc_count--) |
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77 | put_bits(&a->pb, ff_asv_ccp_tab[0][1], ff_asv_ccp_tab[0][0]); |
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78 | |||
79 | put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]); |
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80 | |||
81 | if(ccp&8) asv1_put_level(&a->pb, block[index + 0]); |
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82 | if(ccp&4) asv1_put_level(&a->pb, block[index + 8]); |
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83 | if(ccp&2) asv1_put_level(&a->pb, block[index + 1]); |
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84 | if(ccp&1) asv1_put_level(&a->pb, block[index + 9]); |
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85 | }else{ |
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86 | nc_count++; |
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87 | } |
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88 | } |
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89 | put_bits(&a->pb, ff_asv_ccp_tab[16][1], ff_asv_ccp_tab[16][0]); |
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90 | } |
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91 | |||
92 | static inline void asv2_encode_block(ASV1Context *a, int16_t block[64]){ |
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93 | int i; |
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94 | int count=0; |
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95 | |||
96 | for(count=63; count>3; count--){ |
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97 | const int index = ff_asv_scantab[count]; |
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98 | |||
99 | if( (block[index]*a->q_intra_matrix[index] + (1<<15))>>16 ) |
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100 | break; |
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101 | } |
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102 | |||
103 | count >>= 2; |
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104 | |||
105 | asv2_put_bits(&a->pb, 4, count); |
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106 | asv2_put_bits(&a->pb, 8, (block[0] + 32)>>6); |
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107 | block[0]= 0; |
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108 | |||
109 | for(i=0; i<=count; i++){ |
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110 | const int index = ff_asv_scantab[4*i]; |
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111 | int ccp=0; |
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112 | |||
113 | if( (block[index + 0] = (block[index + 0]*a->q_intra_matrix[index + 0] + (1<<15))>>16) ) ccp |= 8; |
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114 | if( (block[index + 8] = (block[index + 8]*a->q_intra_matrix[index + 8] + (1<<15))>>16) ) ccp |= 4; |
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115 | if( (block[index + 1] = (block[index + 1]*a->q_intra_matrix[index + 1] + (1<<15))>>16) ) ccp |= 2; |
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116 | if( (block[index + 9] = (block[index + 9]*a->q_intra_matrix[index + 9] + (1<<15))>>16) ) ccp |= 1; |
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117 | |||
118 | av_assert2(i || ccp<8); |
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119 | if(i) put_bits(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]); |
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120 | else put_bits(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]); |
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121 | |||
122 | if(ccp){ |
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123 | if(ccp&8) asv2_put_level(&a->pb, block[index + 0]); |
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124 | if(ccp&4) asv2_put_level(&a->pb, block[index + 8]); |
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125 | if(ccp&2) asv2_put_level(&a->pb, block[index + 1]); |
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126 | if(ccp&1) asv2_put_level(&a->pb, block[index + 9]); |
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127 | } |
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128 | } |
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129 | } |
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130 | |||
131 | #define MAX_MB_SIZE (30*16*16*3/2/8) |
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132 | |||
133 | static inline int encode_mb(ASV1Context *a, int16_t block[6][64]){ |
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134 | int i; |
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135 | |||
136 | if (a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb)>>3) < MAX_MB_SIZE) { |
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137 | av_log(a->avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
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138 | return -1; |
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139 | } |
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140 | |||
141 | if(a->avctx->codec_id == AV_CODEC_ID_ASV1){ |
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142 | for(i=0; i<6; i++) |
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143 | asv1_encode_block(a, block[i]); |
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144 | }else{ |
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145 | for(i=0; i<6; i++) |
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146 | asv2_encode_block(a, block[i]); |
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147 | } |
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148 | return 0; |
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149 | } |
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150 | |||
151 | static inline void dct_get(ASV1Context *a, int mb_x, int mb_y){ |
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152 | int16_t (*block)[64]= a->block; |
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153 | int linesize= a->picture.linesize[0]; |
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154 | int i; |
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155 | |||
156 | uint8_t *ptr_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; |
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157 | uint8_t *ptr_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; |
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158 | uint8_t *ptr_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; |
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159 | |||
160 | a->dsp.get_pixels(block[0], ptr_y , linesize); |
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161 | a->dsp.get_pixels(block[1], ptr_y + 8, linesize); |
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162 | a->dsp.get_pixels(block[2], ptr_y + 8*linesize , linesize); |
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163 | a->dsp.get_pixels(block[3], ptr_y + 8*linesize + 8, linesize); |
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164 | for(i=0; i<4; i++) |
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165 | a->dsp.fdct(block[i]); |
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166 | |||
167 | if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ |
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168 | a->dsp.get_pixels(block[4], ptr_cb, a->picture.linesize[1]); |
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169 | a->dsp.get_pixels(block[5], ptr_cr, a->picture.linesize[2]); |
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170 | for(i=4; i<6; i++) |
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171 | a->dsp.fdct(block[i]); |
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172 | } |
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173 | } |
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174 | |||
175 | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
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176 | const AVFrame *pict, int *got_packet) |
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177 | { |
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178 | ASV1Context * const a = avctx->priv_data; |
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179 | AVFrame * const p= &a->picture; |
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180 | int size, ret; |
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181 | int mb_x, mb_y; |
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182 | |||
183 | if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height*a->mb_width*MAX_MB_SIZE + |
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184 | FF_MIN_BUFFER_SIZE)) < 0) |
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185 | return ret; |
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186 | |||
187 | init_put_bits(&a->pb, pkt->data, pkt->size); |
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188 | |||
189 | *p = *pict; |
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190 | p->pict_type= AV_PICTURE_TYPE_I; |
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191 | p->key_frame= 1; |
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192 | |||
193 | for(mb_y=0; mb_y |
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194 | for(mb_x=0; mb_x |
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195 | dct_get(a, mb_x, mb_y); |
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196 | encode_mb(a, a->block); |
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197 | } |
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198 | } |
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199 | |||
200 | if(a->mb_width2 != a->mb_width){ |
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201 | mb_x= a->mb_width2; |
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202 | for(mb_y=0; mb_y |
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203 | dct_get(a, mb_x, mb_y); |
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204 | encode_mb(a, a->block); |
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205 | } |
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206 | } |
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207 | |||
208 | if(a->mb_height2 != a->mb_height){ |
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209 | mb_y= a->mb_height2; |
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210 | for(mb_x=0; mb_x |
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211 | dct_get(a, mb_x, mb_y); |
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212 | encode_mb(a, a->block); |
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213 | } |
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214 | } |
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215 | emms_c(); |
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216 | |||
217 | avpriv_align_put_bits(&a->pb); |
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218 | while(put_bits_count(&a->pb)&31) |
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219 | put_bits(&a->pb, 8, 0); |
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220 | |||
221 | size= put_bits_count(&a->pb)/32; |
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222 | |||
223 | if(avctx->codec_id == AV_CODEC_ID_ASV1) |
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224 | a->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size); |
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225 | else{ |
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226 | int i; |
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227 | for(i=0; i<4*size; i++) |
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228 | pkt->data[i] = ff_reverse[pkt->data[i]]; |
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229 | } |
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230 | |||
231 | pkt->size = size*4; |
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232 | pkt->flags |= AV_PKT_FLAG_KEY; |
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233 | *got_packet = 1; |
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234 | |||
235 | return 0; |
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236 | } |
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237 | |||
238 | static av_cold int encode_init(AVCodecContext *avctx){ |
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239 | ASV1Context * const a = avctx->priv_data; |
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240 | int i; |
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241 | const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; |
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242 | |||
243 | ff_asv_common_init(avctx); |
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244 | |||
245 | if(avctx->global_quality == 0) avctx->global_quality= 4*FF_QUALITY_SCALE; |
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246 | |||
247 | a->inv_qscale= (32*scale*FF_QUALITY_SCALE + avctx->global_quality/2) / avctx->global_quality; |
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248 | |||
249 | avctx->extradata= av_mallocz(8); |
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250 | avctx->extradata_size=8; |
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251 | ((uint32_t*)avctx->extradata)[0]= av_le2ne32(a->inv_qscale); |
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252 | ((uint32_t*)avctx->extradata)[1]= av_le2ne32(AV_RL32("ASUS")); |
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253 | |||
254 | for(i=0; i<64; i++){ |
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255 | int q= 32*scale*ff_mpeg1_default_intra_matrix[i]; |
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256 | a->q_intra_matrix[i]= ((a->inv_qscale<<16) + q/2) / q; |
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257 | } |
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258 | |||
259 | return 0; |
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260 | } |
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261 | |||
262 | #if CONFIG_ASV1_ENCODER |
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263 | AVCodec ff_asv1_encoder = { |
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264 | .name = "asv1", |
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265 | .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), |
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266 | .type = AVMEDIA_TYPE_VIDEO, |
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267 | .id = AV_CODEC_ID_ASV1, |
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268 | .priv_data_size = sizeof(ASV1Context), |
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269 | .init = encode_init, |
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270 | .encode2 = encode_frame, |
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271 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, |
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272 | AV_PIX_FMT_NONE }, |
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273 | }; |
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274 | #endif |
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275 | |||
276 | #if CONFIG_ASV2_ENCODER |
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277 | AVCodec ff_asv2_encoder = { |
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278 | .name = "asv2", |
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279 | .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), |
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280 | .type = AVMEDIA_TYPE_VIDEO, |
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281 | .id = AV_CODEC_ID_ASV2, |
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282 | .priv_data_size = sizeof(ASV1Context), |
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283 | .init = encode_init, |
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284 | .encode2 = encode_frame, |
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285 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, |
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286 | AV_PIX_FMT_NONE }, |
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287 | }; |
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288 | #endif16)><16)>64;>4*size;>>6;>4;>6;>6;>>8); |