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Rev | Author | Line No. | Line |
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576 | serge | 1 | /* |
2 | leyer3.c: the layer 3 decoder |
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3 | |||
4 | copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1 |
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5 | see COPYING and AUTHORS files in distribution or http://mpg123.de |
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6 | initially written by Michael Hipp |
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7 | |||
8 | Optimize-TODO: put short bands into the band-field without the stride of 3 reals |
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9 | Length-optimze: unify long and short band code where it is possible |
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10 | |||
11 | The int-vs-pointer situation has to be cleaned up. |
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12 | */ |
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13 | |||
14 | //#include |
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15 | //#include "config.h" |
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16 | #include "mpg123.h" |
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17 | #include "huffman.h" |
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18 | |||
19 | //#include "common.h" |
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20 | //#include "debug.h" |
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21 | |||
22 | #include "getbits.h" |
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23 | |||
24 | static real ispow[8207]; |
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25 | static real aa_ca[8],aa_cs[8]; |
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26 | static real COS1[12][6]; |
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27 | static real win[4][36]; |
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28 | static real win1[4][36]; |
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29 | static real gainpow2[256+118+4]; |
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30 | #ifdef USE_3DNOW |
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31 | real COS9[9]; |
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32 | static real COS6_1,COS6_2; |
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33 | real tfcos36[9]; |
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34 | #else |
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35 | static real COS9[9]; |
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36 | static real COS6_1,COS6_2; |
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37 | static real tfcos36[9]; |
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38 | #endif |
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39 | static real tfcos12[3]; |
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40 | #define NEW_DCT9 |
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41 | #ifdef NEW_DCT9 |
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42 | static real cos9[3],cos18[3]; |
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43 | #endif |
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44 | |||
45 | struct bandInfoStruct { |
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46 | int longIdx[23]; |
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47 | int longDiff[22]; |
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48 | int shortIdx[14]; |
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49 | int shortDiff[13]; |
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50 | }; |
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51 | |||
52 | int longLimit[9][23]; |
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53 | int shortLimit[9][14]; |
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54 | |||
55 | struct bandInfoStruct bandInfo[9] = { |
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56 | |||
57 | /* MPEG 1.0 */ |
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58 | { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, |
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59 | {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, |
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60 | {0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3}, |
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61 | {4,4,4,4,6,8,10,12,14,18,22,30,56} } , |
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62 | |||
63 | { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, |
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64 | {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, |
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65 | {0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3}, |
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66 | {4,4,4,4,6,6,10,12,14,16,20,26,66} } , |
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67 | |||
68 | { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} , |
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69 | {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} , |
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70 | {0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} , |
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71 | {4,4,4,4,6,8,12,16,20,26,34,42,12} } , |
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72 | |||
73 | /* MPEG 2.0 */ |
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74 | { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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75 | {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , |
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76 | {0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} , |
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77 | {4,4,4,6,6,8,10,14,18,26,32,42,18 } } , |
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78 | |||
79 | /* mhipp trunk has 330 -> 332 without further explanation ... */ |
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80 | { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}, |
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81 | {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } , |
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82 | {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} , |
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83 | {4,4,4,6,8,10,12,14,18,24,32,44,12 } } , |
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84 | |||
85 | { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, |
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86 | {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, |
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87 | {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3}, |
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88 | {4,4,4,6,8,10,12,14,18,24,30,40,18 } } , |
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89 | /* MPEG 2.5 */ |
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90 | { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , |
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91 | {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, |
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92 | {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, |
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93 | {4,4,4,6,8,10,12,14,18,24,30,40,18} }, |
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94 | { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , |
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95 | {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, |
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96 | {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, |
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97 | {4,4,4,6,8,10,12,14,18,24,30,40,18} }, |
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98 | { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, |
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99 | {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, |
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100 | {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, |
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101 | {8,8,8,12,16,20,24,28,36,2,2,2,26} } , |
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102 | }; |
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103 | |||
104 | static int mapbuf0[9][152]; |
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105 | static int mapbuf1[9][156]; |
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106 | static int mapbuf2[9][44]; |
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107 | static int *map[9][3]; |
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108 | static int *mapend[9][3]; |
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109 | |||
110 | static unsigned int n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ |
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111 | static unsigned int i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ |
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112 | |||
113 | static real tan1_1[16],tan2_1[16],tan1_2[16],tan2_2[16]; |
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114 | static real pow1_1[2][16],pow2_1[2][16],pow1_2[2][16],pow2_2[2][16]; |
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115 | |||
116 | #ifdef GAPLESS |
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117 | /* still a dirty hack, places in bytes (zero-based)... */ |
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118 | static unsigned long position; /* position in raw decoder bytestream */ |
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119 | static unsigned long begin; /* first byte to play == number to skip */ |
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120 | static unsigned long end; /* last byte to play */ |
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121 | static unsigned long ignore; /* forcedly ignore stuff in between */ |
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122 | static int bytified; |
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123 | |||
124 | /* input in bytes already */ |
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125 | void layer3_gapless_init(unsigned long b, unsigned long e) |
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126 | { |
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127 | bytified = 0; |
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128 | position = 0; |
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129 | ignore = 0; |
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130 | begin = b; |
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131 | end = e; |
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132 | debug2("layer3_gapless_init: from %lu to %lu samples", begin, end); |
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133 | } |
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134 | |||
135 | void layer3_gapless_set_position(unsigned long frames, struct frame* fr, struct audio_info_struct *ai) |
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136 | { |
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137 | position = samples_to_bytes(frames*spf(fr), fr, ai); |
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138 | debug1("set; position now %lu", position); |
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139 | } |
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140 | |||
141 | void layer3_gapless_bytify(struct frame *fr, struct audio_info_struct *ai) |
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142 | { |
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143 | if(!bytified) |
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144 | { |
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145 | begin = samples_to_bytes(begin, fr, ai); |
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146 | end = samples_to_bytes(end, fr, ai); |
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147 | bytified = 1; |
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148 | debug2("bytified: begin=%lu; end=%5lu", begin, end); |
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149 | } |
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150 | } |
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151 | |||
152 | /* I need initialized fr here! */ |
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153 | void layer3_gapless_set_ignore(unsigned long frames, struct frame *fr, struct audio_info_struct *ai) |
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154 | { |
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155 | ignore = samples_to_bytes(frames*spf(fr), fr, ai); |
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156 | } |
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157 | |||
158 | /* |
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159 | take the (partially or fully) filled and remove stuff for gapless mode if needed |
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160 | pcm_point may then be smaller than before... |
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161 | */ |
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162 | void layer3_gapless_buffercheck() |
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163 | { |
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164 | /* pcm_point bytes added since last position... */ |
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165 | unsigned long new_pos = position + pcm_point; |
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166 | if(begin && (position < begin)) |
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167 | { |
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168 | debug4("new_pos %lu (old: %lu), begin %lu, pcm_point %i", new_pos, position, begin, pcm_point); |
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169 | if(new_pos < begin) |
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170 | { |
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171 | if(ignore > pcm_point) ignore -= pcm_point; |
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172 | else ignore = 0; |
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173 | pcm_point = 0; /* full of padding/delay */ |
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174 | } |
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175 | else |
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176 | { |
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177 | unsigned long ignored = begin-position; |
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178 | /* we need to shift the memory to the left... */ |
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179 | debug3("old pcm_point: %i, begin %lu; good bytes: %i", pcm_point, begin, (int)(new_pos-begin)); |
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180 | if(ignore > ignored) ignore -= ignored; |
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181 | else ignore = 0; |
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182 | pcm_point -= ignored; |
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183 | debug3("shifting %i bytes from %p to %p", pcm_point, pcm_sample+(int)(begin-position), pcm_sample); |
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184 | memmove(pcm_sample, pcm_sample+(int)(begin-position), pcm_point); |
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185 | } |
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186 | } |
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187 | /* I don't cover the case with both end and begin in chunk! */ |
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188 | else if(end && (new_pos > end)) |
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189 | { |
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190 | ignore = 0; |
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191 | /* either end in current chunk or chunk totally out */ |
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192 | debug2("ending at position %lu / point %i", new_pos, pcm_point); |
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193 | if(position < end) pcm_point -= new_pos-end; |
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194 | else pcm_point = 0; |
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195 | debug1("set pcm_point to %i", pcm_point); |
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196 | } |
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197 | else if(ignore) |
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198 | { |
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199 | if(pcm_point < ignore) |
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200 | { |
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201 | ignore -= pcm_point; |
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202 | debug2("ignored %i bytes; pcm_point = 0; %lu bytes left", pcm_point, ignore); |
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203 | pcm_point = 0; |
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204 | } |
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205 | else |
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206 | { |
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207 | /* we need to shift the memory to the left... */ |
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208 | debug3("old pcm_point: %i, to ignore: %lu; good bytes: %i", pcm_point, ignore, pcm_point-(int)ignore); |
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209 | pcm_point -= ignore; |
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210 | debug3("shifting %i bytes from %p to %p", pcm_point, pcm_sample+ignore, pcm_sample); |
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211 | memmove(pcm_sample, pcm_sample+ignore, pcm_point); |
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212 | ignore = 0; |
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213 | } |
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214 | } |
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215 | position = new_pos; |
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216 | } |
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217 | #endif |
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218 | |||
219 | /* |
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220 | * init tables for layer-3 |
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221 | */ |
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222 | |||
223 | real hybridIn [2][SBLIMIT][SSLIMIT]; |
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224 | real hybridOut[2][SSLIMIT][SBLIMIT]; |
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225 | static real block[2][2][SBLIMIT*SSLIMIT] = { { { 0, } } }; |
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226 | static int blc[2]={0,0}; |
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227 | |||
228 | void reset_mpg() |
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229 | { |
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230 | memset(block,0,sizeof(block)); |
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231 | blc[0]=0; |
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232 | blc[1]=0; |
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233 | init_dct(); |
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234 | }; |
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235 | |||
236 | |||
237 | #pragma warning(disable:4244) |
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238 | void init_layer3(int down_sample_sblimit) |
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239 | { |
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240 | int i,j,k,l; |
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241 | |||
242 | for(i=-256;i<118+4;i++) |
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243 | #ifdef USE_MMX |
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244 | if(!param.down_sample) |
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245 | gainpow2[i+256] = 16384.0 * pow((double)2.0,-0.25 * (double) (i+210) ); |
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246 | else |
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247 | #endif |
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248 | gainpow2[i+256] = DOUBLE_TO_REAL(pow_test((double)2.0,-0.25 * (double) (i+210))); |
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249 | |||
250 | for(i=0;i<8207;i++) |
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251 | ispow[i] = DOUBLE_TO_REAL(pow_test((double)i,(double)4.0/3.0)); |
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252 | |||
253 | for (i=0;i<8;i++) { |
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254 | static double Ci[8]={-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; |
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255 | double sq=sqrt(1.0+Ci[i]*Ci[i]); |
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256 | aa_cs[i] = DOUBLE_TO_REAL(1.0/sq); |
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257 | aa_ca[i] = DOUBLE_TO_REAL(Ci[i]/sq); |
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258 | } |
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259 | |||
260 | for(i=0;i<18;i++) { |
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261 | win[0][i] = win[1][i] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 72.0 * (double) (2*(i+0) +1) ) / cos ( M_PI * (double) (2*(i+0) +19) / 72.0 )); |
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262 | win[0][i+18] = win[3][i+18] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 72.0 * (double) (2*(i+18)+1) ) / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 )); |
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263 | } |
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264 | for(i=0;i<6;i++) { |
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265 | win[1][i+18] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 )); |
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266 | win[3][i+12] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 )); |
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267 | win[1][i+24] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+13) ) / cos ( M_PI * (double) (2*(i+24)+19) / 72.0 )); |
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268 | win[1][i+30] = win[3][i] = DOUBLE_TO_REAL(0.0); |
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269 | win[3][i+6 ] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*(i+6 )+19) / 72.0 )); |
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270 | } |
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271 | |||
272 | for(i=0;i<9;i++) |
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273 | COS9[i] = DOUBLE_TO_REAL(cos( M_PI / 18.0 * (double) i)); |
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274 | |||
275 | for(i=0;i<9;i++) |
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276 | tfcos36[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 36.0 )); |
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277 | for(i=0;i<3;i++) |
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278 | tfcos12[i] = DOUBLE_TO_REAL(0.5 / cos ( M_PI * (double) (i*2+1) / 12.0 )); |
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279 | |||
280 | COS6_1 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 1)); |
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281 | COS6_2 = DOUBLE_TO_REAL(cos( M_PI / 6.0 * (double) 2)); |
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282 | |||
283 | #ifdef NEW_DCT9 |
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284 | cos9[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/9.0)); |
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285 | cos9[1] = DOUBLE_TO_REAL(cos(5.0*M_PI/9.0)); |
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286 | cos9[2] = DOUBLE_TO_REAL(cos(7.0*M_PI/9.0)); |
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287 | cos18[0] = DOUBLE_TO_REAL(cos(1.0*M_PI/18.0)); |
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288 | cos18[1] = DOUBLE_TO_REAL(cos(11.0*M_PI/18.0)); |
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289 | cos18[2] = DOUBLE_TO_REAL(cos(13.0*M_PI/18.0)); |
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290 | #endif |
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291 | |||
292 | for(i=0;i<12;i++) { |
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293 | win[2][i] = DOUBLE_TO_REAL(0.5 * sin( M_PI / 24.0 * (double) (2*i+1) ) / cos ( M_PI * (double) (2*i+7) / 24.0 )); |
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294 | for(j=0;j<6;j++) |
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295 | COS1[i][j] = DOUBLE_TO_REAL(cos( M_PI / 24.0 * (double) ((2*i+7)*(2*j+1)) )); |
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296 | } |
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297 | |||
298 | for(j=0;j<4;j++) { |
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299 | static int len[4] = { 36,36,12,36 }; |
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300 | for(i=0;i |
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301 | win1[j][i] = + win[j][i]; |
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302 | for(i=1;i |
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303 | win1[j][i] = - win[j][i]; |
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304 | } |
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305 | |||
306 | for(i=0;i<16;i++) { |
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307 | double t = tan( (double) i * M_PI / 12.0 ); |
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308 | tan1_1[i] = DOUBLE_TO_REAL(t / (1.0+t)); |
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309 | tan2_1[i] = DOUBLE_TO_REAL(1.0 / (1.0 + t)); |
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310 | tan1_2[i] = DOUBLE_TO_REAL(M_SQRT2 * t / (1.0+t)); |
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311 | tan2_2[i] = DOUBLE_TO_REAL(M_SQRT2 / (1.0 + t)); |
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312 | |||
313 | for(j=0;j<2;j++) { |
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314 | double base = pow_test(2.0,-0.25*(j+1.0)); |
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315 | double p1=1.0,p2=1.0; |
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316 | if(i > 0) { |
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317 | if( i & 1 ) |
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318 | p1 = pow_test(base,(i+1.0)*0.5); |
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319 | else |
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320 | p2 = pow_test(base,i*0.5); |
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321 | } |
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322 | pow1_1[j][i] = DOUBLE_TO_REAL(p1); |
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323 | pow2_1[j][i] = DOUBLE_TO_REAL(p2); |
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324 | pow1_2[j][i] = DOUBLE_TO_REAL(M_SQRT2 * p1); |
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325 | pow2_2[j][i] = DOUBLE_TO_REAL(M_SQRT2 * p2); |
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326 | } |
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327 | } |
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328 | |||
329 | for(j=0;j<9;j++) { |
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330 | struct bandInfoStruct *bi = &bandInfo[j]; |
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331 | int *mp; |
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332 | int cb,lwin; |
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333 | int *bdf; |
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334 | |||
335 | mp = map[j][0] = mapbuf0[j]; |
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336 | bdf = bi->longDiff; |
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337 | for(i=0,cb = 0; cb < 8 ; cb++,i+=*bdf++) { |
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338 | *mp++ = (*bdf) >> 1; |
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339 | *mp++ = i; |
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340 | *mp++ = 3; |
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341 | *mp++ = cb; |
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342 | } |
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343 | bdf = bi->shortDiff+3; |
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344 | for(cb=3;cb<13;cb++) { |
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345 | int l = (*bdf++) >> 1; |
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346 | for(lwin=0;lwin<3;lwin++) { |
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347 | *mp++ = l; |
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348 | *mp++ = i + lwin; |
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349 | *mp++ = lwin; |
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350 | *mp++ = cb; |
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351 | } |
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352 | i += 6*l; |
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353 | } |
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354 | mapend[j][0] = mp; |
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355 | |||
356 | mp = map[j][1] = mapbuf1[j]; |
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357 | bdf = bi->shortDiff+0; |
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358 | for(i=0,cb=0;cb<13;cb++) { |
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359 | int l = (*bdf++) >> 1; |
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360 | for(lwin=0;lwin<3;lwin++) { |
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361 | *mp++ = l; |
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362 | *mp++ = i + lwin; |
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363 | *mp++ = lwin; |
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364 | *mp++ = cb; |
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365 | } |
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366 | i += 6*l; |
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367 | } |
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368 | mapend[j][1] = mp; |
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369 | |||
370 | mp = map[j][2] = mapbuf2[j]; |
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371 | bdf = bi->longDiff; |
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372 | for(cb = 0; cb < 22 ; cb++) { |
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373 | *mp++ = (*bdf++) >> 1; |
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374 | *mp++ = cb; |
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375 | } |
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376 | mapend[j][2] = mp; |
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377 | |||
378 | } |
||
379 | |||
380 | for(j=0;j<9;j++) { |
||
381 | for(i=0;i<23;i++) { |
||
382 | longLimit[j][i] = (bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; |
||
383 | if(longLimit[j][i] > (down_sample_sblimit) ) |
||
384 | longLimit[j][i] = down_sample_sblimit; |
||
385 | } |
||
386 | for(i=0;i<14;i++) { |
||
387 | shortLimit[j][i] = (bandInfo[j].shortIdx[i] - 1) / 18 + 1; |
||
388 | if(shortLimit[j][i] > (down_sample_sblimit) ) |
||
389 | shortLimit[j][i] = down_sample_sblimit; |
||
390 | } |
||
391 | } |
||
392 | |||
393 | for(i=0;i<5;i++) { |
||
394 | for(j=0;j<6;j++) { |
||
395 | for(k=0;k<6;k++) { |
||
396 | int n = k + j * 6 + i * 36; |
||
397 | i_slen2[n] = i|(j<<3)|(k<<6)|(3<<12); |
||
398 | } |
||
399 | } |
||
400 | } |
||
401 | for(i=0;i<4;i++) { |
||
402 | for(j=0;j<4;j++) { |
||
403 | for(k=0;k<4;k++) { |
||
404 | int n = k + j * 4 + i * 16; |
||
405 | i_slen2[n+180] = i|(j<<3)|(k<<6)|(4<<12); |
||
406 | } |
||
407 | } |
||
408 | } |
||
409 | for(i=0;i<4;i++) { |
||
410 | for(j=0;j<3;j++) { |
||
411 | int n = j + i * 3; |
||
412 | i_slen2[n+244] = i|(j<<3) | (5<<12); |
||
413 | n_slen2[n+500] = i|(j<<3) | (2<<12) | (1<<15); |
||
414 | } |
||
415 | } |
||
416 | |||
417 | for(i=0;i<5;i++) { |
||
418 | for(j=0;j<5;j++) { |
||
419 | for(k=0;k<4;k++) { |
||
420 | for(l=0;l<4;l++) { |
||
421 | int n = l + k * 4 + j * 16 + i * 80; |
||
422 | n_slen2[n] = i|(j<<3)|(k<<6)|(l<<9)|(0<<12); |
||
423 | } |
||
424 | } |
||
425 | } |
||
426 | } |
||
427 | for(i=0;i<5;i++) { |
||
428 | for(j=0;j<5;j++) { |
||
429 | for(k=0;k<4;k++) { |
||
430 | int n = k + j * 4 + i * 20; |
||
431 | n_slen2[n+400] = i|(j<<3)|(k<<6)|(1<<12); |
||
432 | } |
||
433 | } |
||
434 | } |
||
435 | } |
||
436 | |||
437 | /* |
||
438 | * read additional side information (for MPEG 1 and MPEG 2) |
||
439 | */ |
||
440 | static int III_get_side_info(struct III_sideinfo *si,int stereo, |
||
441 | int ms_stereo,long sfreq,int single,int lsf) |
||
442 | { |
||
443 | int ch, gr; |
||
444 | int powdiff = (single == 3) ? 4 : 0; |
||
445 | |||
446 | static const int tabs[2][5] = { { 2,9,5,3,4 } , { 1,8,1,2,9 } }; |
||
447 | const int *tab = tabs[lsf]; |
||
448 | |||
449 | si->main_data_begin = getbits(tab[1]); |
||
450 | if (stereo == 1) |
||
451 | si->private_bits = getbits_fast(tab[2]); |
||
452 | else |
||
453 | si->private_bits = getbits_fast(tab[3]); |
||
454 | |||
455 | if(!lsf) { |
||
456 | for (ch=0; ch |
||
457 | si->ch[ch].gr[0].scfsi = -1; |
||
458 | si->ch[ch].gr[1].scfsi = getbits_fast(4); |
||
459 | } |
||
460 | } |
||
461 | |||
462 | for (gr=0; gr |
||
463 | for (ch=0; ch |
||
464 | register struct gr_info_s *gr_info = &(si->ch[ch].gr[gr]); |
||
465 | |||
466 | gr_info->part2_3_length = getbits(12); |
||
467 | gr_info->big_values = getbits(9); |
||
468 | if(gr_info->big_values > 288) { |
||
469 | gr_info->big_values = 288; |
||
470 | } |
||
471 | gr_info->pow2gain = gainpow2+256 - getbits_fast(8) + powdiff; |
||
472 | if(ms_stereo) |
||
473 | gr_info->pow2gain += 2; |
||
474 | gr_info->scalefac_compress = getbits(tab[4]); |
||
475 | |||
476 | if(get1bit()) { /* window switch flag */ |
||
477 | int i; |
||
478 | gr_info->block_type = getbits_fast(2); |
||
479 | gr_info->mixed_block_flag = get1bit(); |
||
480 | gr_info->table_select[0] = getbits_fast(5); |
||
481 | gr_info->table_select[1] = getbits_fast(5); |
||
482 | /* |
||
483 | * table_select[2] not needed, because there is no region2, |
||
484 | * but to satisfy some verifications tools we set it either. |
||
485 | */ |
||
486 | gr_info->table_select[2] = 0; |
||
487 | for(i=0;i<3;i++) |
||
488 | gr_info->full_gain[i] = gr_info->pow2gain + (getbits_fast(3)<<3); |
||
489 | |||
490 | if(gr_info->block_type == 0) { |
||
491 | /* exit(1); */ |
||
492 | return 1; |
||
493 | } |
||
494 | |||
495 | /* region_count/start parameters are implicit in this case. */ |
||
496 | if(!lsf || gr_info->block_type == 2) |
||
497 | gr_info->region1start = 36>>1; |
||
498 | else { |
||
499 | /* check this again for 2.5 and sfreq=8 */ |
||
500 | if(sfreq == 8) |
||
501 | gr_info->region1start = 108>>1; |
||
502 | else |
||
503 | gr_info->region1start = 54>>1; |
||
504 | } |
||
505 | gr_info->region2start = 576>>1; |
||
506 | } |
||
507 | else { |
||
508 | int i,r0c,r1c; |
||
509 | for (i=0; i<3; i++) |
||
510 | gr_info->table_select[i] = getbits_fast(5); |
||
511 | r0c = getbits_fast(4); |
||
512 | r1c = getbits_fast(3); |
||
513 | gr_info->region1start = bandInfo[sfreq].longIdx[r0c+1] >> 1 ; |
||
514 | gr_info->region2start = bandInfo[sfreq].longIdx[r0c+1+r1c+1] >> 1; |
||
515 | gr_info->block_type = 0; |
||
516 | gr_info->mixed_block_flag = 0; |
||
517 | } |
||
518 | if(!lsf) |
||
519 | gr_info->preflag = get1bit(); |
||
520 | gr_info->scalefac_scale = get1bit(); |
||
521 | gr_info->count1table_select = get1bit(); |
||
522 | } |
||
523 | } |
||
524 | return 0; |
||
525 | } |
||
526 | |||
527 | /* |
||
528 | * read scalefactors |
||
529 | */ |
||
530 | static int III_get_scale_factors_1(int *scf,struct gr_info_s *gr_info,int ch,int gr) |
||
531 | { |
||
532 | static const unsigned char slen[2][16] = { |
||
533 | {0, 0, 0, 0, 3, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4}, |
||
534 | {0, 1, 2, 3, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 2, 3} |
||
535 | }; |
||
536 | int numbits; |
||
537 | int num0 = slen[0][gr_info->scalefac_compress]; |
||
538 | int num1 = slen[1][gr_info->scalefac_compress]; |
||
539 | |||
540 | if (gr_info->block_type == 2) { |
||
541 | int i=18; |
||
542 | numbits = (num0 + num1) * 18; |
||
543 | |||
544 | if (gr_info->mixed_block_flag) { |
||
545 | for (i=8;i;i--) |
||
546 | *scf++ = getbits_fast(num0); |
||
547 | i = 9; |
||
548 | numbits -= num0; /* num0 * 17 + num1 * 18 */ |
||
549 | } |
||
550 | |||
551 | for (;i;i--) |
||
552 | *scf++ = getbits_fast(num0); |
||
553 | for (i = 18; i; i--) |
||
554 | *scf++ = getbits_fast(num1); |
||
555 | *scf++ = 0; *scf++ = 0; *scf++ = 0; /* short[13][0..2] = 0 */ |
||
556 | } |
||
557 | else { |
||
558 | int i; |
||
559 | int scfsi = gr_info->scfsi; |
||
560 | |||
561 | if(scfsi < 0) { /* scfsi < 0 => granule == 0 */ |
||
562 | for(i=11;i;i--) |
||
563 | *scf++ = getbits_fast(num0); |
||
564 | for(i=10;i;i--) |
||
565 | *scf++ = getbits_fast(num1); |
||
566 | numbits = (num0 + num1) * 10 + num0; |
||
567 | *scf++ = 0; |
||
568 | } |
||
569 | else { |
||
570 | numbits = 0; |
||
571 | if(!(scfsi & 0x8)) { |
||
572 | for (i=0;i<6;i++) |
||
573 | *scf++ = getbits_fast(num0); |
||
574 | numbits += num0 * 6; |
||
575 | } |
||
576 | else { |
||
577 | scf += 6; |
||
578 | } |
||
579 | |||
580 | if(!(scfsi & 0x4)) { |
||
581 | for (i=0;i<5;i++) |
||
582 | *scf++ = getbits_fast(num0); |
||
583 | numbits += num0 * 5; |
||
584 | } |
||
585 | else { |
||
586 | scf += 5; |
||
587 | } |
||
588 | |||
589 | if(!(scfsi & 0x2)) { |
||
590 | for(i=0;i<5;i++) |
||
591 | *scf++ = getbits_fast(num1); |
||
592 | numbits += num1 * 5; |
||
593 | } |
||
594 | else { |
||
595 | scf += 5; |
||
596 | } |
||
597 | |||
598 | if(!(scfsi & 0x1)) { |
||
599 | for (i=0;i<5;i++) |
||
600 | *scf++ = getbits_fast(num1); |
||
601 | numbits += num1 * 5; |
||
602 | } |
||
603 | else { |
||
604 | scf += 5; |
||
605 | } |
||
606 | *scf++ = 0; /* no l[21] in original sources */ |
||
607 | } |
||
608 | } |
||
609 | return numbits; |
||
610 | } |
||
611 | |||
612 | static int III_get_scale_factors_2(int *scf,struct gr_info_s *gr_info,int i_stereo) |
||
613 | { |
||
614 | unsigned char *pnt; |
||
615 | int i,j,n=0,numbits=0; |
||
616 | unsigned int slen; |
||
617 | |||
618 | static const unsigned char stab[3][6][4] = { |
||
619 | { { 6, 5, 5,5 } , { 6, 5, 7,3 } , { 11,10,0,0} , |
||
620 | { 7, 7, 7,0 } , { 6, 6, 6,3 } , { 8, 8,5,0} } , |
||
621 | { { 9, 9, 9,9 } , { 9, 9,12,6 } , { 18,18,0,0} , |
||
622 | {12,12,12,0 } , {12, 9, 9,6 } , { 15,12,9,0} } , |
||
623 | { { 6, 9, 9,9 } , { 6, 9,12,6 } , { 15,18,0,0} , |
||
624 | { 6,15,12,0 } , { 6,12, 9,6 } , { 6,18,9,0} } }; |
||
625 | |||
626 | if(i_stereo) /* i_stereo AND second channel -> do_layer3() checks this */ |
||
627 | slen = i_slen2[gr_info->scalefac_compress>>1]; |
||
628 | else |
||
629 | slen = n_slen2[gr_info->scalefac_compress]; |
||
630 | |||
631 | gr_info->preflag = (slen>>15) & 0x1; |
||
632 | |||
633 | n = 0; |
||
634 | if( gr_info->block_type == 2 ) { |
||
635 | n++; |
||
636 | if(gr_info->mixed_block_flag) |
||
637 | n++; |
||
638 | } |
||
639 | |||
640 | pnt = stab[n][(slen>>12)&0x7]; |
||
641 | |||
642 | for(i=0;i<4;i++) { |
||
643 | int num = slen & 0x7; |
||
644 | slen >>= 3; |
||
645 | if(num) { |
||
646 | for(j=0;j<(int)(pnt[i]);j++) |
||
647 | *scf++ = getbits_fast(num); |
||
648 | numbits += pnt[i] * num; |
||
649 | } |
||
650 | else { |
||
651 | for(j=0;j<(int)(pnt[i]);j++) |
||
652 | *scf++ = 0; |
||
653 | } |
||
654 | } |
||
655 | |||
656 | n = (n << 1) + 1; |
||
657 | for(i=0;i |
||
658 | *scf++ = 0; |
||
659 | |||
660 | return numbits; |
||
661 | } |
||
662 | |||
663 | static int pretab1[22] = {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0}; |
||
664 | static int pretab2[22] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; |
||
665 | |||
666 | /* |
||
667 | * Dequantize samples (includes huffman decoding) |
||
668 | */ |
||
669 | /* 24 is enough because tab13 has max. a 19 bit huffvector */ |
||
670 | #define BITSHIFT ((sizeof(long)-1)*8) |
||
671 | #define REFRESH_MASK \ |
||
672 | while(num < BITSHIFT) { \ |
||
673 | mask |= ((unsigned long)getbyte())<<(BITSHIFT-num); \ |
||
674 | num += 8; \ |
||
675 | part2remain -= 8; } |
||
676 | |||
677 | static int III_dequantize_sample(real xr[SBLIMIT][SSLIMIT],int *scf, |
||
678 | struct gr_info_s *gr_info,int sfreq,int part2bits) |
||
679 | { |
||
680 | int shift = 1 + gr_info->scalefac_scale; |
||
681 | real *xrpnt = (real *) xr; |
||
682 | int l[3],l3; |
||
683 | int part2remain = gr_info->part2_3_length - part2bits; |
||
684 | int *me; |
||
685 | |||
686 | /* mhipp tree has this split up a bit... */ |
||
687 | int num=getbitoffset(); |
||
688 | long mask = (long) getbits(num)<<(BITSHIFT+8-num); |
||
689 | part2remain -= num; |
||
690 | |||
691 | { |
||
692 | int bv = gr_info->big_values; |
||
693 | int region1 = gr_info->region1start; |
||
694 | int region2 = gr_info->region2start; |
||
695 | if(region1 > region2) |
||
696 | { |
||
697 | return 1; |
||
698 | } |
||
699 | l3 = ((576>>1)-bv)>>1; |
||
700 | /* |
||
701 | * we may lose the 'odd' bit here !! |
||
702 | * check this later again |
||
703 | */ |
||
704 | if(bv <= region1) { |
||
705 | l[0] = bv; l[1] = 0; l[2] = 0; |
||
706 | } |
||
707 | else { |
||
708 | l[0] = region1; |
||
709 | if(bv <= region2) { |
||
710 | l[1] = bv - l[0]; l[2] = 0; |
||
711 | } |
||
712 | else { |
||
713 | l[1] = region2 - l[0]; l[2] = bv - region2; |
||
714 | } |
||
715 | } |
||
716 | } |
||
717 | |||
718 | if(gr_info->block_type == 2) { |
||
719 | /* |
||
720 | * decoding with short or mixed mode BandIndex table |
||
721 | */ |
||
722 | int i,max[4]; |
||
723 | int step=0,lwin=3,cb=0; |
||
724 | register real v = 0.0; |
||
725 | register int *m,mc; |
||
726 | |||
727 | if(gr_info->mixed_block_flag) { |
||
728 | max[3] = -1; |
||
729 | max[0] = max[1] = max[2] = 2; |
||
730 | m = map[sfreq][0]; |
||
731 | me = mapend[sfreq][0]; |
||
732 | } |
||
733 | else { |
||
734 | max[0] = max[1] = max[2] = max[3] = -1; |
||
735 | /* max[3] not really needed in this case */ |
||
736 | m = map[sfreq][1]; |
||
737 | me = mapend[sfreq][1]; |
||
738 | } |
||
739 | |||
740 | mc = 0; |
||
741 | for(i=0;i<2;i++) { |
||
742 | int lp = l[i]; |
||
743 | struct newhuff *h = ht+gr_info->table_select[i]; |
||
744 | for(;lp;lp--,mc--) { |
||
745 | register int x,y; |
||
746 | if( (!mc) ) { |
||
747 | mc = *m++; |
||
748 | xrpnt = ((real *) xr) + (*m++); |
||
749 | lwin = *m++; |
||
750 | cb = *m++; |
||
751 | if(lwin == 3) { |
||
752 | v = gr_info->pow2gain[(*scf++) << shift]; |
||
753 | step = 1; |
||
754 | } |
||
755 | else { |
||
756 | v = gr_info->full_gain[lwin][(*scf++) << shift]; |
||
757 | step = 3; |
||
758 | } |
||
759 | } |
||
760 | { |
||
761 | register short *val = h->table; |
||
762 | REFRESH_MASK; |
||
763 | while((y=*val++)<0) { |
||
764 | if (mask < 0) |
||
765 | val -= y; |
||
766 | num--; |
||
767 | mask <<= 1; |
||
768 | } |
||
769 | x = y >> 4; |
||
770 | y &= 0xf; |
||
771 | } |
||
772 | if(x == 15 && h->linbits) { |
||
773 | max[lwin] = cb; |
||
774 | REFRESH_MASK; |
||
775 | x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
||
776 | num -= h->linbits+1; |
||
777 | mask <<= h->linbits; |
||
778 | if(mask < 0) |
||
779 | *xrpnt = REAL_MUL(-ispow[x], v); |
||
780 | else |
||
781 | *xrpnt = REAL_MUL(ispow[x], v); |
||
782 | mask <<= 1; |
||
783 | } |
||
784 | else if(x) { |
||
785 | max[lwin] = cb; |
||
786 | if(mask < 0) |
||
787 | *xrpnt = REAL_MUL(-ispow[x], v); |
||
788 | else |
||
789 | *xrpnt = REAL_MUL(ispow[x], v); |
||
790 | num--; |
||
791 | mask <<= 1; |
||
792 | } |
||
793 | else |
||
794 | *xrpnt = DOUBLE_TO_REAL(0.0); |
||
795 | xrpnt += step; |
||
796 | if(y == 15 && h->linbits) { |
||
797 | max[lwin] = cb; |
||
798 | REFRESH_MASK; |
||
799 | y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
||
800 | num -= h->linbits+1; |
||
801 | mask <<= h->linbits; |
||
802 | if(mask < 0) |
||
803 | *xrpnt = REAL_MUL(-ispow[y], v); |
||
804 | else |
||
805 | *xrpnt = REAL_MUL(ispow[y], v); |
||
806 | mask <<= 1; |
||
807 | } |
||
808 | else if(y) { |
||
809 | max[lwin] = cb; |
||
810 | if(mask < 0) |
||
811 | *xrpnt = REAL_MUL(-ispow[y], v); |
||
812 | else |
||
813 | *xrpnt = REAL_MUL(ispow[y], v); |
||
814 | num--; |
||
815 | mask <<= 1; |
||
816 | } |
||
817 | else |
||
818 | *xrpnt = DOUBLE_TO_REAL(0.0); |
||
819 | xrpnt += step; |
||
820 | } |
||
821 | } |
||
822 | |||
823 | for(;l3 && (part2remain+num > 0);l3--) { |
||
824 | /* not mixing code and declarations to keep C89 happy */ |
||
825 | struct newhuff* h; |
||
826 | register short* val; |
||
827 | register short a; |
||
828 | /* This is only a humble hack to prevent a special segfault. */ |
||
829 | /* More insight into the real workings is still needed. */ |
||
830 | /* especially why there are (valid?) files that make xrpnt exceed the array with 4 bytes without segfaulting, more seems to be really bad, though. */ |
||
831 | #ifdef DEBUG |
||
832 | if(!(xrpnt < &xr[SBLIMIT][0])) |
||
833 | { |
||
834 | if(param.verbose) debug2("attempted soft xrpnt overflow (%p !< %p) ?", (void*) xrpnt, (void*) &xr[SBLIMIT][0]); |
||
835 | } |
||
836 | #endif |
||
837 | if(!(xrpnt < &xr[SBLIMIT][0]+5)) |
||
838 | { |
||
839 | return 2; |
||
840 | } |
||
841 | h = htc+gr_info->count1table_select; |
||
842 | val = h->table; |
||
843 | |||
844 | REFRESH_MASK; |
||
845 | while((a=*val++)<0) { |
||
846 | if (mask < 0) |
||
847 | val -= a; |
||
848 | num--; |
||
849 | mask <<= 1; |
||
850 | } |
||
851 | if(part2remain+num <= 0) { |
||
852 | num -= part2remain+num; |
||
853 | break; |
||
854 | } |
||
855 | |||
856 | for(i=0;i<4;i++) { |
||
857 | if(!(i & 1)) { |
||
858 | if(!mc) { |
||
859 | mc = *m++; |
||
860 | xrpnt = ((real *) xr) + (*m++); |
||
861 | lwin = *m++; |
||
862 | cb = *m++; |
||
863 | if(lwin == 3) { |
||
864 | v = gr_info->pow2gain[(*scf++) << shift]; |
||
865 | step = 1; |
||
866 | } |
||
867 | else { |
||
868 | v = gr_info->full_gain[lwin][(*scf++) << shift]; |
||
869 | step = 3; |
||
870 | } |
||
871 | } |
||
872 | mc--; |
||
873 | } |
||
874 | if( (a & (0x8>>i)) ) { |
||
875 | max[lwin] = cb; |
||
876 | if(part2remain+num <= 0) { |
||
877 | break; |
||
878 | } |
||
879 | if(mask < 0) |
||
880 | *xrpnt = -v; |
||
881 | else |
||
882 | *xrpnt = v; |
||
883 | num--; |
||
884 | mask <<= 1; |
||
885 | } |
||
886 | else |
||
887 | *xrpnt = DOUBLE_TO_REAL(0.0); |
||
888 | xrpnt += step; |
||
889 | } |
||
890 | } |
||
891 | |||
892 | if(lwin < 3) { /* short band? */ |
||
893 | while(1) { |
||
894 | for(;mc > 0;mc--) { |
||
895 | *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; /* short band -> step=3 */ |
||
896 | *xrpnt = DOUBLE_TO_REAL(0.0); xrpnt += 3; |
||
897 | } |
||
898 | if(m >= me) |
||
899 | break; |
||
900 | mc = *m++; |
||
901 | xrpnt = ((real *) xr) + *m++; |
||
902 | if(*m++ == 0) |
||
903 | break; /* optimize: field will be set to zero at the end of the function */ |
||
904 | m++; /* cb */ |
||
905 | } |
||
906 | } |
||
907 | |||
908 | gr_info->maxband[0] = max[0]+1; |
||
909 | gr_info->maxband[1] = max[1]+1; |
||
910 | gr_info->maxband[2] = max[2]+1; |
||
911 | gr_info->maxbandl = max[3]+1; |
||
912 | |||
913 | { |
||
914 | int rmax = max[0] > max[1] ? max[0] : max[1]; |
||
915 | rmax = (rmax > max[2] ? rmax : max[2]) + 1; |
||
916 | gr_info->maxb = rmax ? shortLimit[sfreq][rmax] : longLimit[sfreq][max[3]+1]; |
||
917 | } |
||
918 | |||
919 | } |
||
920 | else { |
||
921 | /* |
||
922 | * decoding with 'long' BandIndex table (block_type != 2) |
||
923 | */ |
||
924 | int *pretab = gr_info->preflag ? pretab1 : pretab2; |
||
925 | int i,max = -1; |
||
926 | int cb = 0; |
||
927 | int *m = map[sfreq][2]; |
||
928 | register real v = 0.0; |
||
929 | int mc = 0; |
||
930 | |||
931 | /* |
||
932 | * long hash table values |
||
933 | */ |
||
934 | for(i=0;i<3;i++) { |
||
935 | int lp = l[i]; |
||
936 | struct newhuff *h = ht+gr_info->table_select[i]; |
||
937 | |||
938 | for(;lp;lp--,mc--) { |
||
939 | int x,y; |
||
940 | if(!mc) { |
||
941 | mc = *m++; |
||
942 | cb = *m++; |
||
943 | if(cb == 21) |
||
944 | v = 0.0; |
||
945 | else |
||
946 | v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; |
||
947 | |||
948 | } |
||
949 | { |
||
950 | register short *val = h->table; |
||
951 | REFRESH_MASK; |
||
952 | while((y=*val++)<0) { |
||
953 | if (mask < 0) |
||
954 | val -= y; |
||
955 | num--; |
||
956 | mask <<= 1; |
||
957 | } |
||
958 | x = y >> 4; |
||
959 | y &= 0xf; |
||
960 | } |
||
961 | |||
962 | if (x == 15 && h->linbits) { |
||
963 | max = cb; |
||
964 | REFRESH_MASK; |
||
965 | x += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
||
966 | num -= h->linbits+1; |
||
967 | mask <<= h->linbits; |
||
968 | if(mask < 0) |
||
969 | *xrpnt++ = REAL_MUL(-ispow[x], v); |
||
970 | else |
||
971 | *xrpnt++ = REAL_MUL(ispow[x], v); |
||
972 | mask <<= 1; |
||
973 | } |
||
974 | else if(x) { |
||
975 | max = cb; |
||
976 | if(mask < 0) |
||
977 | *xrpnt++ = REAL_MUL(-ispow[x], v); |
||
978 | else |
||
979 | *xrpnt++ = REAL_MUL(ispow[x], v); |
||
980 | num--; |
||
981 | mask <<= 1; |
||
982 | } |
||
983 | else |
||
984 | *xrpnt++ = DOUBLE_TO_REAL(0.0); |
||
985 | |||
986 | if (y == 15 && h->linbits) { |
||
987 | max = cb; |
||
988 | REFRESH_MASK; |
||
989 | y += ((unsigned long) mask) >> (BITSHIFT+8-h->linbits); |
||
990 | num -= h->linbits+1; |
||
991 | mask <<= h->linbits; |
||
992 | if(mask < 0) |
||
993 | *xrpnt++ = REAL_MUL(-ispow[y], v); |
||
994 | else |
||
995 | *xrpnt++ = REAL_MUL(ispow[y], v); |
||
996 | mask <<= 1; |
||
997 | } |
||
998 | else if(y) { |
||
999 | max = cb; |
||
1000 | if(mask < 0) |
||
1001 | *xrpnt++ = REAL_MUL(-ispow[y], v); |
||
1002 | else |
||
1003 | *xrpnt++ = REAL_MUL(ispow[y], v); |
||
1004 | num--; |
||
1005 | mask <<= 1; |
||
1006 | } |
||
1007 | else |
||
1008 | *xrpnt++ = DOUBLE_TO_REAL(0.0); |
||
1009 | } |
||
1010 | } |
||
1011 | |||
1012 | /* |
||
1013 | * short (count1table) values |
||
1014 | */ |
||
1015 | for(;l3 && (part2remain+num > 0);l3--) { |
||
1016 | struct newhuff *h = htc+gr_info->count1table_select; |
||
1017 | register short *val = h->table,a; |
||
1018 | |||
1019 | REFRESH_MASK; |
||
1020 | while((a=*val++)<0) { |
||
1021 | if (mask < 0) |
||
1022 | val -= a; |
||
1023 | num--; |
||
1024 | mask <<= 1; |
||
1025 | } |
||
1026 | if(part2remain+num <= 0) { |
||
1027 | num -= part2remain+num; |
||
1028 | break; |
||
1029 | } |
||
1030 | |||
1031 | for(i=0;i<4;i++) { |
||
1032 | if(!(i & 1)) { |
||
1033 | if(!mc) { |
||
1034 | mc = *m++; |
||
1035 | cb = *m++; |
||
1036 | if(cb == 21) |
||
1037 | v = 0.0; |
||
1038 | else |
||
1039 | v = gr_info->pow2gain[((*scf++) + (*pretab++)) << shift]; |
||
1040 | } |
||
1041 | mc--; |
||
1042 | } |
||
1043 | if ( (a & (0x8>>i)) ) { |
||
1044 | max = cb; |
||
1045 | if(part2remain+num <= 0) { |
||
1046 | break; |
||
1047 | } |
||
1048 | if(mask < 0) |
||
1049 | *xrpnt++ = -v; |
||
1050 | else |
||
1051 | *xrpnt++ = v; |
||
1052 | num--; |
||
1053 | mask <<= 1; |
||
1054 | } |
||
1055 | else |
||
1056 | *xrpnt++ = DOUBLE_TO_REAL(0.0); |
||
1057 | } |
||
1058 | } |
||
1059 | |||
1060 | gr_info->maxbandl = max+1; |
||
1061 | gr_info->maxb = longLimit[sfreq][gr_info->maxbandl]; |
||
1062 | } |
||
1063 | |||
1064 | part2remain += num; |
||
1065 | backbits(num); |
||
1066 | num = 0; |
||
1067 | |||
1068 | while(xrpnt < &xr[SBLIMIT][0]) |
||
1069 | *xrpnt++ = DOUBLE_TO_REAL(0.0); |
||
1070 | |||
1071 | while( part2remain > 16 ) { |
||
1072 | getbits(16); /* Dismiss stuffing Bits */ |
||
1073 | part2remain -= 16; |
||
1074 | } |
||
1075 | if(part2remain > 0) |
||
1076 | getbits(part2remain); |
||
1077 | else if(part2remain < 0) { |
||
1078 | return 1; /* -> error */ |
||
1079 | } |
||
1080 | return 0; |
||
1081 | } |
||
1082 | |||
1083 | /* |
||
1084 | * III_stereo: calculate real channel values for Joint-I-Stereo-mode |
||
1085 | */ |
||
1086 | static void III_i_stereo(real xr_buf[2][SBLIMIT][SSLIMIT],int *scalefac, |
||
1087 | struct gr_info_s *gr_info,int sfreq,int ms_stereo,int lsf) |
||
1088 | { |
||
1089 | real (*xr)[SBLIMIT*SSLIMIT] = (real (*)[SBLIMIT*SSLIMIT] ) xr_buf; |
||
1090 | struct bandInfoStruct *bi = &bandInfo[sfreq]; |
||
1091 | |||
1092 | const real *tab1,*tab2; |
||
1093 | |||
1094 | #if 1 |
||
1095 | int tab; |
||
1096 | /* TODO: optimize as static */ |
||
1097 | static const real *tabs[3][2][2] = { |
||
1098 | { { tan1_1,tan2_1 } , { tan1_2,tan2_2 } }, |
||
1099 | { { pow1_1[0],pow2_1[0] } , { pow1_2[0],pow2_2[0] } } , |
||
1100 | { { pow1_1[1],pow2_1[1] } , { pow1_2[1],pow2_2[1] } } |
||
1101 | }; |
||
1102 | |||
1103 | tab = lsf + (gr_info->scalefac_compress & lsf); |
||
1104 | tab1 = tabs[tab][ms_stereo][0]; |
||
1105 | tab2 = tabs[tab][ms_stereo][1]; |
||
1106 | #else |
||
1107 | if(lsf) { |
||
1108 | int p = gr_info->scalefac_compress & 0x1; |
||
1109 | if(ms_stereo) { |
||
1110 | tab1 = pow1_2[p]; tab2 = pow2_2[p]; |
||
1111 | } |
||
1112 | else { |
||
1113 | tab1 = pow1_1[p]; tab2 = pow2_1[p]; |
||
1114 | } |
||
1115 | } |
||
1116 | else { |
||
1117 | if(ms_stereo) { |
||
1118 | tab1 = tan1_2; tab2 = tan2_2; |
||
1119 | } |
||
1120 | else { |
||
1121 | tab1 = tan1_1; tab2 = tan2_1; |
||
1122 | } |
||
1123 | } |
||
1124 | #endif |
||
1125 | |||
1126 | if (gr_info->block_type == 2) { |
||
1127 | int lwin,do_l = 0; |
||
1128 | if( gr_info->mixed_block_flag ) |
||
1129 | do_l = 1; |
||
1130 | |||
1131 | for (lwin=0;lwin<3;lwin++) { /* process each window */ |
||
1132 | /* get first band with zero values */ |
||
1133 | int is_p,sb,idx,sfb = gr_info->maxband[lwin]; /* sfb is minimal 3 for mixed mode */ |
||
1134 | if(sfb > 3) |
||
1135 | do_l = 0; |
||
1136 | |||
1137 | for(;sfb<12;sfb++) { |
||
1138 | is_p = scalefac[sfb*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
||
1139 | if(is_p != 7) { |
||
1140 | real t1,t2; |
||
1141 | sb = bi->shortDiff[sfb]; |
||
1142 | idx = bi->shortIdx[sfb] + lwin; |
||
1143 | t1 = tab1[is_p]; t2 = tab2[is_p]; |
||
1144 | for (; sb > 0; sb--,idx+=3) { |
||
1145 | real v = xr[0][idx]; |
||
1146 | xr[0][idx] = REAL_MUL(v, t1); |
||
1147 | xr[1][idx] = REAL_MUL(v, t2); |
||
1148 | } |
||
1149 | } |
||
1150 | } |
||
1151 | |||
1152 | #if 1 |
||
1153 | /* in the original: copy 10 to 11 , here: copy 11 to 12 |
||
1154 | maybe still wrong??? (copy 12 to 13?) */ |
||
1155 | is_p = scalefac[11*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
||
1156 | sb = bi->shortDiff[12]; |
||
1157 | idx = bi->shortIdx[12] + lwin; |
||
1158 | #else |
||
1159 | is_p = scalefac[10*3+lwin-gr_info->mixed_block_flag]; /* scale: 0-15 */ |
||
1160 | sb = bi->shortDiff[11]; |
||
1161 | idx = bi->shortIdx[11] + lwin; |
||
1162 | #endif |
||
1163 | if(is_p != 7) { |
||
1164 | real t1,t2; |
||
1165 | t1 = tab1[is_p]; t2 = tab2[is_p]; |
||
1166 | for ( ; sb > 0; sb--,idx+=3 ) { |
||
1167 | real v = xr[0][idx]; |
||
1168 | xr[0][idx] = REAL_MUL(v, t1); |
||
1169 | xr[1][idx] = REAL_MUL(v, t2); |
||
1170 | } |
||
1171 | } |
||
1172 | } /* end for(lwin; .. ; . ) */ |
||
1173 | |||
1174 | /* also check l-part, if ALL bands in the three windows are 'empty' |
||
1175 | * and mode = mixed_mode |
||
1176 | */ |
||
1177 | if (do_l) { |
||
1178 | int sfb = gr_info->maxbandl; |
||
1179 | int idx; |
||
1180 | if(sfb > 21) return; /* similarity fix related to CVE-2006-1655 */ |
||
1181 | idx = bi->longIdx[sfb]; |
||
1182 | for ( ; sfb<8; sfb++ ) { |
||
1183 | int sb = bi->longDiff[sfb]; |
||
1184 | int is_p = scalefac[sfb]; /* scale: 0-15 */ |
||
1185 | if(is_p != 7) { |
||
1186 | real t1,t2; |
||
1187 | t1 = tab1[is_p]; t2 = tab2[is_p]; |
||
1188 | for ( ; sb > 0; sb--,idx++) { |
||
1189 | real v = xr[0][idx]; |
||
1190 | xr[0][idx] = REAL_MUL(v, t1); |
||
1191 | xr[1][idx] = REAL_MUL(v, t2); |
||
1192 | } |
||
1193 | } |
||
1194 | else |
||
1195 | idx += sb; |
||
1196 | } |
||
1197 | } |
||
1198 | } |
||
1199 | else { /* ((gr_info->block_type != 2)) */ |
||
1200 | int sfb = gr_info->maxbandl; |
||
1201 | int is_p,idx; |
||
1202 | if(sfb > 21) return; /* tightened fix for CVE-2006-1655 */ |
||
1203 | idx = bi->longIdx[sfb]; |
||
1204 | for ( ; sfb<21; sfb++) { |
||
1205 | int sb = bi->longDiff[sfb]; |
||
1206 | is_p = scalefac[sfb]; /* scale: 0-15 */ |
||
1207 | if(is_p != 7) { |
||
1208 | real t1,t2; |
||
1209 | t1 = tab1[is_p]; t2 = tab2[is_p]; |
||
1210 | for ( ; sb > 0; sb--,idx++) { |
||
1211 | real v = xr[0][idx]; |
||
1212 | xr[0][idx] = REAL_MUL(v, t1); |
||
1213 | xr[1][idx] = REAL_MUL(v, t2); |
||
1214 | } |
||
1215 | } |
||
1216 | else |
||
1217 | idx += sb; |
||
1218 | } |
||
1219 | |||
1220 | is_p = scalefac[20]; |
||
1221 | if(is_p != 7) { /* copy l-band 20 to l-band 21 */ |
||
1222 | int sb; |
||
1223 | real t1 = tab1[is_p],t2 = tab2[is_p]; |
||
1224 | |||
1225 | for ( sb = bi->longDiff[21]; sb > 0; sb--,idx++ ) { |
||
1226 | real v = xr[0][idx]; |
||
1227 | xr[0][idx] = REAL_MUL(v, t1); |
||
1228 | xr[1][idx] = REAL_MUL(v, t2); |
||
1229 | } |
||
1230 | } |
||
1231 | } /* ... */ |
||
1232 | } |
||
1233 | |||
1234 | static void III_antialias(real xr[SBLIMIT][SSLIMIT],struct gr_info_s *gr_info) { |
||
1235 | int sblim; |
||
1236 | |||
1237 | if(gr_info->block_type == 2) { |
||
1238 | if(!gr_info->mixed_block_flag) |
||
1239 | return; |
||
1240 | sblim = 1; |
||
1241 | } |
||
1242 | else { |
||
1243 | sblim = gr_info->maxb-1; |
||
1244 | } |
||
1245 | |||
1246 | /* 31 alias-reduction operations between each pair of sub-bands */ |
||
1247 | /* with 8 butterflies between each pair */ |
||
1248 | |||
1249 | { |
||
1250 | int sb; |
||
1251 | real *xr1=(real *) xr[1]; |
||
1252 | |||
1253 | for(sb=sblim;sb;sb--,xr1+=10) { |
||
1254 | int ss; |
||
1255 | real *cs=aa_cs,*ca=aa_ca; |
||
1256 | real *xr2 = xr1; |
||
1257 | |||
1258 | for(ss=7;ss>=0;ss--) |
||
1259 | { /* upper and lower butterfly inputs */ |
||
1260 | register real bu = *--xr2,bd = *xr1; |
||
1261 | *xr2 = REAL_MUL(bu, *cs) - REAL_MUL(bd, *ca); |
||
1262 | *xr1++ = REAL_MUL(bd, *cs++) + REAL_MUL(bu, *ca++); |
||
1263 | } |
||
1264 | } |
||
1265 | } |
||
1266 | } |
||
1267 | |||
1268 | /* |
||
1269 | // This is an optimized DCT from Jeff Tsay's maplay 1.2+ package. |
||
1270 | // Saved one multiplication by doing the 'twiddle factor' stuff |
||
1271 | // together with the window mul. (MH) |
||
1272 | // |
||
1273 | // This uses Byeong Gi Lee's Fast Cosine Transform algorithm, but the |
||
1274 | // 9 point IDCT needs to be reduced further. Unfortunately, I don't |
||
1275 | // know how to do that, because 9 is not an even number. - Jeff. |
||
1276 | // |
||
1277 | ////////////////////////////////////////////////////////////////// |
||
1278 | // |
||
1279 | // 9 Point Inverse Discrete Cosine Transform |
||
1280 | // |
||
1281 | // This piece of code is Copyright 1997 Mikko Tommila and is freely usable |
||
1282 | // by anybody. The algorithm itself is of course in the public domain. |
||
1283 | // |
||
1284 | // Again derived heuristically from the 9-point WFTA. |
||
1285 | // |
||
1286 | // The algorithm is optimized (?) for speed, not for small rounding errors or |
||
1287 | // good readability. |
||
1288 | // |
||
1289 | // 36 additions, 11 multiplications |
||
1290 | // |
||
1291 | // Again this is very likely sub-optimal. |
||
1292 | // |
||
1293 | // The code is optimized to use a minimum number of temporary variables, |
||
1294 | // so it should compile quite well even on 8-register Intel x86 processors. |
||
1295 | // This makes the code quite obfuscated and very difficult to understand. |
||
1296 | // |
||
1297 | // References: |
||
1298 | // [1] S. Winograd: "On Computing the Discrete Fourier Transform", |
||
1299 | // Mathematics of Computation, Volume 32, Number 141, January 1978, |
||
1300 | // Pages 175-199 |
||
1301 | */ |
||
1302 | |||
1303 | /*------------------------------------------------------------------*/ |
||
1304 | /* */ |
||
1305 | /* Function: Calculation of the inverse MDCT */ |
||
1306 | /* */ |
||
1307 | /*------------------------------------------------------------------*/ |
||
1308 | #ifdef USE_3DNOW |
||
1309 | void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) |
||
1310 | #else |
||
1311 | static void dct36(real *inbuf,real *o1,real *o2,real *wintab,real *tsbuf) |
||
1312 | #endif |
||
1313 | { |
||
1314 | #ifdef NEW_DCT9 |
||
1315 | real tmp[18]; |
||
1316 | #endif |
||
1317 | |||
1318 | { |
||
1319 | register real *in = inbuf; |
||
1320 | |||
1321 | in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14]; |
||
1322 | in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11]; |
||
1323 | in[11]+=in[10]; in[10]+=in[9]; in[9] +=in[8]; |
||
1324 | in[8] +=in[7]; in[7] +=in[6]; in[6] +=in[5]; |
||
1325 | in[5] +=in[4]; in[4] +=in[3]; in[3] +=in[2]; |
||
1326 | in[2] +=in[1]; in[1] +=in[0]; |
||
1327 | |||
1328 | in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9]; |
||
1329 | in[9] +=in[7]; in[7] +=in[5]; in[5] +=in[3]; in[3] +=in[1]; |
||
1330 | |||
1331 | |||
1332 | #ifdef NEW_DCT9 |
||
1333 | #if 1 |
||
1334 | { |
||
1335 | real t3; |
||
1336 | { |
||
1337 | real t0, t1, t2; |
||
1338 | |||
1339 | t0 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4])); |
||
1340 | t1 = REAL_MUL(COS6_2, in[12]); |
||
1341 | |||
1342 | t3 = in[0]; |
||
1343 | t2 = t3 - t1 - t1; |
||
1344 | tmp[1] = tmp[7] = t2 - t0; |
||
1345 | tmp[4] = t2 + t0 + t0; |
||
1346 | t3 += t1; |
||
1347 | |||
1348 | t2 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2])); |
||
1349 | tmp[1] -= t2; |
||
1350 | tmp[7] += t2; |
||
1351 | } |
||
1352 | { |
||
1353 | real t0, t1, t2; |
||
1354 | |||
1355 | t0 = REAL_MUL(cos9[0], (in[4] + in[8] )); |
||
1356 | t1 = REAL_MUL(cos9[1], (in[8] - in[16])); |
||
1357 | t2 = REAL_MUL(cos9[2], (in[4] + in[16])); |
||
1358 | |||
1359 | tmp[2] = tmp[6] = t3 - t0 - t2; |
||
1360 | tmp[0] = tmp[8] = t3 + t0 + t1; |
||
1361 | tmp[3] = tmp[5] = t3 - t1 + t2; |
||
1362 | } |
||
1363 | } |
||
1364 | { |
||
1365 | real t1, t2, t3; |
||
1366 | |||
1367 | t1 = REAL_MUL(cos18[0], (in[2] + in[10])); |
||
1368 | t2 = REAL_MUL(cos18[1], (in[10] - in[14])); |
||
1369 | t3 = REAL_MUL(COS6_1, in[6]); |
||
1370 | |||
1371 | { |
||
1372 | real t0 = t1 + t2 + t3; |
||
1373 | tmp[0] += t0; |
||
1374 | tmp[8] -= t0; |
||
1375 | } |
||
1376 | |||
1377 | t2 -= t3; |
||
1378 | t1 -= t3; |
||
1379 | |||
1380 | t3 = REAL_MUL(cos18[2], (in[2] + in[14])); |
||
1381 | |||
1382 | t1 += t3; |
||
1383 | tmp[3] += t1; |
||
1384 | tmp[5] -= t1; |
||
1385 | |||
1386 | t2 -= t3; |
||
1387 | tmp[2] += t2; |
||
1388 | tmp[6] -= t2; |
||
1389 | } |
||
1390 | |||
1391 | #else |
||
1392 | { |
||
1393 | real t0, t1, t2, t3, t4, t5, t6, t7; |
||
1394 | |||
1395 | t1 = REAL_MUL(COS6_2, in[12]); |
||
1396 | t2 = REAL_MUL(COS6_2, (in[8] + in[16] - in[4])); |
||
1397 | |||
1398 | t3 = in[0] + t1; |
||
1399 | t4 = in[0] - t1 - t1; |
||
1400 | t5 = t4 - t2; |
||
1401 | tmp[4] = t4 + t2 + t2; |
||
1402 | |||
1403 | t0 = REAL_MUL(cos9[0], (in[4] + in[8])); |
||
1404 | t1 = REAL_MUL(cos9[1], (in[8] - in[16])); |
||
1405 | |||
1406 | t2 = REAL_MUL(cos9[2], (in[4] + in[16])); |
||
1407 | |||
1408 | t6 = t3 - t0 - t2; |
||
1409 | t0 += t3 + t1; |
||
1410 | t3 += t2 - t1; |
||
1411 | |||
1412 | t2 = REAL_MUL(cos18[0], (in[2] + in[10])); |
||
1413 | t4 = REAL_MUL(cos18[1], (in[10] - in[14])); |
||
1414 | t7 = REAL_MUL(COS6_1, in[6]); |
||
1415 | |||
1416 | t1 = t2 + t4 + t7; |
||
1417 | tmp[0] = t0 + t1; |
||
1418 | tmp[8] = t0 - t1; |
||
1419 | t1 = REAL_MUL(cos18[2], (in[2] + in[14])); |
||
1420 | t2 += t1 - t7; |
||
1421 | |||
1422 | tmp[3] = t3 + t2; |
||
1423 | t0 = REAL_MUL(COS6_1, (in[10] + in[14] - in[2])); |
||
1424 | tmp[5] = t3 - t2; |
||
1425 | |||
1426 | t4 -= t1 + t7; |
||
1427 | |||
1428 | tmp[1] = t5 - t0; |
||
1429 | tmp[7] = t5 + t0; |
||
1430 | tmp[2] = t6 + t4; |
||
1431 | tmp[6] = t6 - t4; |
||
1432 | } |
||
1433 | #endif |
||
1434 | |||
1435 | { |
||
1436 | real t0, t1, t2, t3, t4, t5, t6, t7; |
||
1437 | |||
1438 | t1 = REAL_MUL(COS6_2, in[13]); |
||
1439 | t2 = REAL_MUL(COS6_2, (in[9] + in[17] - in[5])); |
||
1440 | |||
1441 | t3 = in[1] + t1; |
||
1442 | t4 = in[1] - t1 - t1; |
||
1443 | t5 = t4 - t2; |
||
1444 | |||
1445 | t0 = REAL_MUL(cos9[0], (in[5] + in[9])); |
||
1446 | t1 = REAL_MUL(cos9[1], (in[9] - in[17])); |
||
1447 | |||
1448 | tmp[13] = REAL_MUL((t4 + t2 + t2), tfcos36[17-13]); |
||
1449 | t2 = REAL_MUL(cos9[2], (in[5] + in[17])); |
||
1450 | |||
1451 | t6 = t3 - t0 - t2; |
||
1452 | t0 += t3 + t1; |
||
1453 | t3 += t2 - t1; |
||
1454 | |||
1455 | t2 = REAL_MUL(cos18[0], (in[3] + in[11])); |
||
1456 | t4 = REAL_MUL(cos18[1], (in[11] - in[15])); |
||
1457 | t7 = REAL_MUL(COS6_1, in[7]); |
||
1458 | |||
1459 | t1 = t2 + t4 + t7; |
||
1460 | tmp[17] = REAL_MUL((t0 + t1), tfcos36[17-17]); |
||
1461 | tmp[9] = REAL_MUL((t0 - t1), tfcos36[17-9]); |
||
1462 | t1 = REAL_MUL(cos18[2], (in[3] + in[15])); |
||
1463 | t2 += t1 - t7; |
||
1464 | |||
1465 | tmp[14] = REAL_MUL((t3 + t2), tfcos36[17-14]); |
||
1466 | t0 = REAL_MUL(COS6_1, (in[11] + in[15] - in[3])); |
||
1467 | tmp[12] = REAL_MUL((t3 - t2), tfcos36[17-12]); |
||
1468 | |||
1469 | t4 -= t1 + t7; |
||
1470 | |||
1471 | tmp[16] = REAL_MUL((t5 - t0), tfcos36[17-16]); |
||
1472 | tmp[10] = REAL_MUL((t5 + t0), tfcos36[17-10]); |
||
1473 | tmp[15] = REAL_MUL((t6 + t4), tfcos36[17-15]); |
||
1474 | tmp[11] = REAL_MUL((t6 - t4), tfcos36[17-11]); |
||
1475 | } |
||
1476 | |||
1477 | #define MACRO(v) { \ |
||
1478 | real tmpval; \ |
||
1479 | tmpval = tmp[(v)] + tmp[17-(v)]; \ |
||
1480 | out2[9+(v)] = REAL_MUL(tmpval, w[27+(v)]); \ |
||
1481 | out2[8-(v)] = REAL_MUL(tmpval, w[26-(v)]); \ |
||
1482 | tmpval = tmp[(v)] - tmp[17-(v)]; \ |
||
1483 | ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(tmpval, w[8-(v)]); \ |
||
1484 | ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(tmpval, w[9+(v)]); } |
||
1485 | |||
1486 | { |
||
1487 | register real *out2 = o2; |
||
1488 | register real *w = wintab; |
||
1489 | register real *out1 = o1; |
||
1490 | register real *ts = tsbuf; |
||
1491 | |||
1492 | MACRO(0); |
||
1493 | MACRO(1); |
||
1494 | MACRO(2); |
||
1495 | MACRO(3); |
||
1496 | MACRO(4); |
||
1497 | MACRO(5); |
||
1498 | MACRO(6); |
||
1499 | MACRO(7); |
||
1500 | MACRO(8); |
||
1501 | } |
||
1502 | |||
1503 | #else |
||
1504 | |||
1505 | { |
||
1506 | |||
1507 | #define MACRO0(v) { \ |
||
1508 | real tmp; \ |
||
1509 | out2[9+(v)] = REAL_MUL((tmp = sum0 + sum1), w[27+(v)]); \ |
||
1510 | out2[8-(v)] = REAL_MUL(tmp, w[26-(v)]); } \ |
||
1511 | sum0 -= sum1; \ |
||
1512 | ts[SBLIMIT*(8-(v))] = out1[8-(v)] + REAL_MUL(sum0, w[8-(v)]); \ |
||
1513 | ts[SBLIMIT*(9+(v))] = out1[9+(v)] + REAL_MUL(sum0, w[9+(v)]); |
||
1514 | #define MACRO1(v) { \ |
||
1515 | real sum0,sum1; \ |
||
1516 | sum0 = tmp1a + tmp2a; \ |
||
1517 | sum1 = REAL_MUL((tmp1b + tmp2b), tfcos36[(v)]); \ |
||
1518 | MACRO0(v); } |
||
1519 | #define MACRO2(v) { \ |
||
1520 | real sum0,sum1; \ |
||
1521 | sum0 = tmp2a - tmp1a; \ |
||
1522 | sum1 = REAL_MUL((tmp2b - tmp1b), tfcos36[(v)]); \ |
||
1523 | MACRO0(v); } |
||
1524 | |||
1525 | register const real *c = COS9; |
||
1526 | register real *out2 = o2; |
||
1527 | register real *w = wintab; |
||
1528 | register real *out1 = o1; |
||
1529 | register real *ts = tsbuf; |
||
1530 | |||
1531 | real ta33,ta66,tb33,tb66; |
||
1532 | |||
1533 | ta33 = REAL_MUL(in[2*3+0], c[3]); |
||
1534 | ta66 = REAL_MUL(in[2*6+0], c[6]); |
||
1535 | tb33 = REAL_MUL(in[2*3+1], c[3]); |
||
1536 | tb66 = REAL_MUL(in[2*6+1], c[6]); |
||
1537 | |||
1538 | { |
||
1539 | real tmp1a,tmp2a,tmp1b,tmp2b; |
||
1540 | tmp1a = REAL_MUL(in[2*1+0], c[1]) + ta33 + REAL_MUL(in[2*5+0], c[5]) + REAL_MUL(in[2*7+0], c[7]); |
||
1541 | tmp1b = REAL_MUL(in[2*1+1], c[1]) + tb33 + REAL_MUL(in[2*5+1], c[5]) + REAL_MUL(in[2*7+1], c[7]); |
||
1542 | tmp2a = REAL_MUL(in[2*2+0], c[2]) + REAL_MUL(in[2*4+0], c[4]) + ta66 + REAL_MUL(in[2*8+0], c[8]); |
||
1543 | tmp2b = REAL_MUL(in[2*2+1], c[2]) + REAL_MUL(in[2*4+1], c[4]) + tb66 + REAL_MUL(in[2*8+1], c[8]); |
||
1544 | |||
1545 | MACRO1(0); |
||
1546 | MACRO2(8); |
||
1547 | } |
||
1548 | |||
1549 | { |
||
1550 | real tmp1a,tmp2a,tmp1b,tmp2b; |
||
1551 | tmp1a = REAL_MUL(( in[2*1+0] - in[2*5+0] - in[2*7+0] ), c[3]); |
||
1552 | tmp1b = REAL_MUL(( in[2*1+1] - in[2*5+1] - in[2*7+1] ), c[3]); |
||
1553 | tmp2a = REAL_MUL(( in[2*2+0] - in[2*4+0] - in[2*8+0] ), c[6]) - in[2*6+0] + in[2*0+0]; |
||
1554 | tmp2b = REAL_MUL(( in[2*2+1] - in[2*4+1] - in[2*8+1] ), c[6]) - in[2*6+1] + in[2*0+1]; |
||
1555 | |||
1556 | MACRO1(1); |
||
1557 | MACRO2(7); |
||
1558 | } |
||
1559 | |||
1560 | { |
||
1561 | real tmp1a,tmp2a,tmp1b,tmp2b; |
||
1562 | tmp1a = REAL_MUL(in[2*1+0], c[5]) - ta33 - REAL_MUL(in[2*5+0], c[7]) + REAL_MUL(in[2*7+0], c[1]); |
||
1563 | tmp1b = REAL_MUL(in[2*1+1], c[5]) - tb33 - REAL_MUL(in[2*5+1], c[7]) + REAL_MUL(in[2*7+1], c[1]); |
||
1564 | tmp2a = - REAL_MUL(in[2*2+0], c[8]) - REAL_MUL(in[2*4+0], c[2]) + ta66 + REAL_MUL(in[2*8+0], c[4]); |
||
1565 | tmp2b = - REAL_MUL(in[2*2+1], c[8]) - REAL_MUL(in[2*4+1], c[2]) + tb66 + REAL_MUL(in[2*8+1], c[4]); |
||
1566 | |||
1567 | MACRO1(2); |
||
1568 | MACRO2(6); |
||
1569 | } |
||
1570 | |||
1571 | { |
||
1572 | real tmp1a,tmp2a,tmp1b,tmp2b; |
||
1573 | tmp1a = REAL_MUL(in[2*1+0], c[7]) - ta33 + REAL_MUL(in[2*5+0], c[1]) - REAL_MUL(in[2*7+0], c[5]); |
||
1574 | tmp1b = REAL_MUL(in[2*1+1], c[7]) - tb33 + REAL_MUL(in[2*5+1], c[1]) - REAL_MUL(in[2*7+1], c[5]); |
||
1575 | tmp2a = - REAL_MUL(in[2*2+0], c[4]) + REAL_MUL(in[2*4+0], c[8]) + ta66 - REAL_MUL(in[2*8+0], c[2]); |
||
1576 | tmp2b = - REAL_MUL(in[2*2+1], c[4]) + REAL_MUL(in[2*4+1], c[8]) + tb66 - REAL_MUL(in[2*8+1], c[2]); |
||
1577 | |||
1578 | MACRO1(3); |
||
1579 | MACRO2(5); |
||
1580 | } |
||
1581 | |||
1582 | { |
||
1583 | real sum0,sum1; |
||
1584 | sum0 = in[2*0+0] - in[2*2+0] + in[2*4+0] - in[2*6+0] + in[2*8+0]; |
||
1585 | sum1 = REAL_MUL((in[2*0+1] - in[2*2+1] + in[2*4+1] - in[2*6+1] + in[2*8+1] ), tfcos36[4]); |
||
1586 | MACRO0(4); |
||
1587 | } |
||
1588 | } |
||
1589 | #endif |
||
1590 | |||
1591 | } |
||
1592 | } |
||
1593 | |||
1594 | /* |
||
1595 | * new DCT12 |
||
1596 | */ |
||
1597 | static void dct12(real *in,real *rawout1,real *rawout2,register real *wi,register real *ts) |
||
1598 | { |
||
1599 | #define DCT12_PART1 \ |
||
1600 | in5 = in[5*3]; \ |
||
1601 | in5 += (in4 = in[4*3]); \ |
||
1602 | in4 += (in3 = in[3*3]); \ |
||
1603 | in3 += (in2 = in[2*3]); \ |
||
1604 | in2 += (in1 = in[1*3]); \ |
||
1605 | in1 += (in0 = in[0*3]); \ |
||
1606 | \ |
||
1607 | in5 += in3; in3 += in1; \ |
||
1608 | \ |
||
1609 | in2 = REAL_MUL(in2, COS6_1); \ |
||
1610 | in3 = REAL_MUL(in3, COS6_1); \ |
||
1611 | |||
1612 | #define DCT12_PART2 \ |
||
1613 | in0 += REAL_MUL(in4, COS6_2); \ |
||
1614 | \ |
||
1615 | in4 = in0 + in2; \ |
||
1616 | in0 -= in2; \ |
||
1617 | \ |
||
1618 | in1 += REAL_MUL(in5, COS6_2); \ |
||
1619 | \ |
||
1620 | in5 = REAL_MUL((in1 + in3), tfcos12[0]); \ |
||
1621 | in1 = REAL_MUL((in1 - in3), tfcos12[2]); \ |
||
1622 | \ |
||
1623 | in3 = in4 + in5; \ |
||
1624 | in4 -= in5; \ |
||
1625 | \ |
||
1626 | in2 = in0 + in1; \ |
||
1627 | in0 -= in1; |
||
1628 | |||
1629 | |||
1630 | { |
||
1631 | real in0,in1,in2,in3,in4,in5; |
||
1632 | register real *out1 = rawout1; |
||
1633 | ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2]; |
||
1634 | ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5]; |
||
1635 | |||
1636 | DCT12_PART1 |
||
1637 | |||
1638 | { |
||
1639 | real tmp0,tmp1 = (in0 - in4); |
||
1640 | { |
||
1641 | real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
||
1642 | tmp0 = tmp1 + tmp2; |
||
1643 | tmp1 -= tmp2; |
||
1644 | } |
||
1645 | ts[(17-1)*SBLIMIT] = out1[17-1] + REAL_MUL(tmp0, wi[11-1]); |
||
1646 | ts[(12+1)*SBLIMIT] = out1[12+1] + REAL_MUL(tmp0, wi[6+1]); |
||
1647 | ts[(6 +1)*SBLIMIT] = out1[6 +1] + REAL_MUL(tmp1, wi[1]); |
||
1648 | ts[(11-1)*SBLIMIT] = out1[11-1] + REAL_MUL(tmp1, wi[5-1]); |
||
1649 | } |
||
1650 | |||
1651 | DCT12_PART2 |
||
1652 | |||
1653 | ts[(17-0)*SBLIMIT] = out1[17-0] + REAL_MUL(in2, wi[11-0]); |
||
1654 | ts[(12+0)*SBLIMIT] = out1[12+0] + REAL_MUL(in2, wi[6+0]); |
||
1655 | ts[(12+2)*SBLIMIT] = out1[12+2] + REAL_MUL(in3, wi[6+2]); |
||
1656 | ts[(17-2)*SBLIMIT] = out1[17-2] + REAL_MUL(in3, wi[11-2]); |
||
1657 | |||
1658 | ts[(6 +0)*SBLIMIT] = out1[6+0] + REAL_MUL(in0, wi[0]); |
||
1659 | ts[(11-0)*SBLIMIT] = out1[11-0] + REAL_MUL(in0, wi[5-0]); |
||
1660 | ts[(6 +2)*SBLIMIT] = out1[6+2] + REAL_MUL(in4, wi[2]); |
||
1661 | ts[(11-2)*SBLIMIT] = out1[11-2] + REAL_MUL(in4, wi[5-2]); |
||
1662 | } |
||
1663 | |||
1664 | in++; |
||
1665 | |||
1666 | { |
||
1667 | real in0,in1,in2,in3,in4,in5; |
||
1668 | register real *out2 = rawout2; |
||
1669 | |||
1670 | DCT12_PART1 |
||
1671 | |||
1672 | { |
||
1673 | real tmp0,tmp1 = (in0 - in4); |
||
1674 | { |
||
1675 | real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
||
1676 | tmp0 = tmp1 + tmp2; |
||
1677 | tmp1 -= tmp2; |
||
1678 | } |
||
1679 | out2[5-1] = REAL_MUL(tmp0, wi[11-1]); |
||
1680 | out2[0+1] = REAL_MUL(tmp0, wi[6+1]); |
||
1681 | ts[(12+1)*SBLIMIT] += REAL_MUL(tmp1, wi[1]); |
||
1682 | ts[(17-1)*SBLIMIT] += REAL_MUL(tmp1, wi[5-1]); |
||
1683 | } |
||
1684 | |||
1685 | DCT12_PART2 |
||
1686 | |||
1687 | out2[5-0] = REAL_MUL(in2, wi[11-0]); |
||
1688 | out2[0+0] = REAL_MUL(in2, wi[6+0]); |
||
1689 | out2[0+2] = REAL_MUL(in3, wi[6+2]); |
||
1690 | out2[5-2] = REAL_MUL(in3, wi[11-2]); |
||
1691 | |||
1692 | ts[(12+0)*SBLIMIT] += REAL_MUL(in0, wi[0]); |
||
1693 | ts[(17-0)*SBLIMIT] += REAL_MUL(in0, wi[5-0]); |
||
1694 | ts[(12+2)*SBLIMIT] += REAL_MUL(in4, wi[2]); |
||
1695 | ts[(17-2)*SBLIMIT] += REAL_MUL(in4, wi[5-2]); |
||
1696 | } |
||
1697 | |||
1698 | in++; |
||
1699 | |||
1700 | { |
||
1701 | real in0,in1,in2,in3,in4,in5; |
||
1702 | register real *out2 = rawout2; |
||
1703 | out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0; |
||
1704 | |||
1705 | DCT12_PART1 |
||
1706 | |||
1707 | { |
||
1708 | real tmp0,tmp1 = (in0 - in4); |
||
1709 | { |
||
1710 | real tmp2 = REAL_MUL((in1 - in5), tfcos12[1]); |
||
1711 | tmp0 = tmp1 + tmp2; |
||
1712 | tmp1 -= tmp2; |
||
1713 | } |
||
1714 | out2[11-1] = REAL_MUL(tmp0, wi[11-1]); |
||
1715 | out2[6 +1] = REAL_MUL(tmp0, wi[6+1]); |
||
1716 | out2[0+1] += REAL_MUL(tmp1, wi[1]); |
||
1717 | out2[5-1] += REAL_MUL(tmp1, wi[5-1]); |
||
1718 | } |
||
1719 | |||
1720 | DCT12_PART2 |
||
1721 | |||
1722 | out2[11-0] = REAL_MUL(in2, wi[11-0]); |
||
1723 | out2[6 +0] = REAL_MUL(in2, wi[6+0]); |
||
1724 | out2[6 +2] = REAL_MUL(in3, wi[6+2]); |
||
1725 | out2[11-2] = REAL_MUL(in3, wi[11-2]); |
||
1726 | |||
1727 | out2[0+0] += REAL_MUL(in0, wi[0]); |
||
1728 | out2[5-0] += REAL_MUL(in0, wi[5-0]); |
||
1729 | out2[0+2] += REAL_MUL(in4, wi[2]); |
||
1730 | out2[5-2] += REAL_MUL(in4, wi[5-2]); |
||
1731 | } |
||
1732 | } |
||
1733 | |||
1734 | /* |
||
1735 | * III_hybrid |
||
1736 | */ |
||
1737 | #ifdef USE_3DNOW |
||
1738 | static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT],int ch,struct gr_info_s *gr_info,struct frame *fr) |
||
1739 | #else |
||
1740 | static void III_hybrid(real fsIn[SBLIMIT][SSLIMIT],real tsOut[SSLIMIT][SBLIMIT], |
||
1741 | int ch,struct gr_info_s *gr_info) |
||
1742 | #endif |
||
1743 | { |
||
1744 | real *tspnt = (real *) tsOut; |
||
1745 | real *rawout1,*rawout2; |
||
1746 | int bt,sb = 0; |
||
1747 | |||
1748 | { |
||
1749 | int b = blc[ch]; |
||
1750 | rawout1=block[b][ch]; |
||
1751 | b=-b+1; |
||
1752 | rawout2=block[b][ch]; |
||
1753 | blc[ch] = b; |
||
1754 | } |
||
1755 | |||
1756 | if(gr_info->mixed_block_flag) { |
||
1757 | sb = 2; |
||
1758 | #ifdef USE_3DNOW |
||
1759 | (fr->dct36)(fsIn[0],rawout1,rawout2,win[0],tspnt); |
||
1760 | (fr->dct36)(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); |
||
1761 | #else |
||
1762 | dct36(fsIn[0],rawout1,rawout2,win[0],tspnt); |
||
1763 | dct36(fsIn[1],rawout1+18,rawout2+18,win1[0],tspnt+1); |
||
1764 | #endif |
||
1765 | rawout1 += 36; rawout2 += 36; tspnt += 2; |
||
1766 | } |
||
1767 | |||
1768 | bt = gr_info->block_type; |
||
1769 | if(bt == 2) { |
||
1770 | for (; sb |
||
1771 | dct12(fsIn[sb] ,rawout1 ,rawout2 ,win[2] ,tspnt); |
||
1772 | dct12(fsIn[sb+1],rawout1+18,rawout2+18,win1[2],tspnt+1); |
||
1773 | } |
||
1774 | } |
||
1775 | else { |
||
1776 | for (; sb |
||
1777 | #ifdef USE_3DNOW |
||
1778 | (fr->dct36)(fsIn[sb],rawout1,rawout2,win[bt],tspnt); |
||
1779 | (fr->dct36)(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); |
||
1780 | #else |
||
1781 | dct36(fsIn[sb],rawout1,rawout2,win[bt],tspnt); |
||
1782 | dct36(fsIn[sb+1],rawout1+18,rawout2+18,win1[bt],tspnt+1); |
||
1783 | #endif |
||
1784 | } |
||
1785 | } |
||
1786 | |||
1787 | for(;sb |
||
1788 | int i; |
||
1789 | for(i=0;i |
||
1790 | tspnt[i*SBLIMIT] = *rawout1++; |
||
1791 | *rawout2++ = DOUBLE_TO_REAL(0.0); |
||
1792 | } |
||
1793 | } |
||
1794 | } |
||
1795 | |||
1796 | int do_layer3(struct frame *fr,byte *pcm_sample,int *pcm_point) |
||
1797 | { |
||
1798 | int gr, ch, ss,clip=0; |
||
1799 | int scalefacs[2][39]; /* max 39 for short[13][3] mode, mixed: 38, long: 22 */ |
||
1800 | struct III_sideinfo sideinfo; |
||
1801 | int stereo = fr->stereo; |
||
1802 | int single = fr->single; |
||
1803 | int ms_stereo,i_stereo; |
||
1804 | int sfreq = fr->sampling_frequency; |
||
1805 | int stereo1,granules; |
||
1806 | |||
1807 | if(stereo == 1) { /* stream is mono */ |
||
1808 | stereo1 = 1; |
||
1809 | single = 0; |
||
1810 | } |
||
1811 | else if(single >= 0) /* stream is stereo, but force to mono */ |
||
1812 | stereo1 = 1; |
||
1813 | else |
||
1814 | stereo1 = 2; |
||
1815 | |||
1816 | if(fr->mode == MPG_MD_JOINT_STEREO) { |
||
1817 | ms_stereo = (fr->mode_ext & 0x2)>>1; |
||
1818 | i_stereo = fr->mode_ext & 0x1; |
||
1819 | } |
||
1820 | else |
||
1821 | ms_stereo = i_stereo = 0; |
||
1822 | |||
1823 | if(fr->lsf) { |
||
1824 | granules = 1; |
||
1825 | #if 0 |
||
1826 | III_get_side_info_2(&sideinfo,stereo,ms_stereo,sfreq,single); |
||
1827 | #endif |
||
1828 | } |
||
1829 | else { |
||
1830 | granules = 2; |
||
1831 | } |
||
1832 | /* quick hack to keep the music playing */ |
||
1833 | /* after having seen this nasty test file... */ |
||
1834 | if(III_get_side_info(&sideinfo,stereo,ms_stereo,sfreq,single,fr->lsf)) |
||
1835 | { |
||
1836 | return clip; |
||
1837 | } |
||
1838 | |||
1839 | set_pointer(sideinfo.main_data_begin); |
||
1840 | |||
1841 | for (gr=0;gr |
||
1842 | { |
||
1843 | |||
1844 | { |
||
1845 | struct gr_info_s *gr_info = &(sideinfo.ch[0].gr[gr]); |
||
1846 | long part2bits; |
||
1847 | if(fr->lsf) |
||
1848 | part2bits = III_get_scale_factors_2(scalefacs[0],gr_info,0); |
||
1849 | else |
||
1850 | part2bits = III_get_scale_factors_1(scalefacs[0],gr_info,0,gr); |
||
1851 | |||
1852 | if(III_dequantize_sample(hybridIn[0], scalefacs[0],gr_info,sfreq,part2bits)) |
||
1853 | return clip; |
||
1854 | } |
||
1855 | |||
1856 | if(stereo == 2) { |
||
1857 | struct gr_info_s *gr_info = &(sideinfo.ch[1].gr[gr]); |
||
1858 | long part2bits; |
||
1859 | if(fr->lsf) |
||
1860 | part2bits = III_get_scale_factors_2(scalefacs[1],gr_info,i_stereo); |
||
1861 | else |
||
1862 | part2bits = III_get_scale_factors_1(scalefacs[1],gr_info,1,gr); |
||
1863 | |||
1864 | if(III_dequantize_sample(hybridIn[1],scalefacs[1],gr_info,sfreq,part2bits)) |
||
1865 | return clip; |
||
1866 | |||
1867 | if(ms_stereo) { |
||
1868 | int i; |
||
1869 | int maxb = sideinfo.ch[0].gr[gr].maxb; |
||
1870 | if(sideinfo.ch[1].gr[gr].maxb > maxb) |
||
1871 | maxb = sideinfo.ch[1].gr[gr].maxb; |
||
1872 | for(i=0;i |
||
1873 | real tmp0 = ((real *)hybridIn[0])[i]; |
||
1874 | real tmp1 = ((real *)hybridIn[1])[i]; |
||
1875 | ((real *)hybridIn[0])[i] = tmp0 + tmp1; |
||
1876 | ((real *)hybridIn[1])[i] = tmp0 - tmp1; |
||
1877 | } |
||
1878 | } |
||
1879 | |||
1880 | if(i_stereo) |
||
1881 | III_i_stereo(hybridIn,scalefacs[1],gr_info,sfreq,ms_stereo,fr->lsf); |
||
1882 | |||
1883 | if(ms_stereo || i_stereo || (single == 3) ) { |
||
1884 | if(gr_info->maxb > sideinfo.ch[0].gr[gr].maxb) |
||
1885 | sideinfo.ch[0].gr[gr].maxb = gr_info->maxb; |
||
1886 | else |
||
1887 | gr_info->maxb = sideinfo.ch[0].gr[gr].maxb; |
||
1888 | } |
||
1889 | |||
1890 | switch(single) { |
||
1891 | case 3: |
||
1892 | { |
||
1893 | register int i; |
||
1894 | register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; |
||
1895 | for(i=0;i |
||
1896 | *in0 = (*in0 + *in1++); /* *0.5 done by pow-scale */ |
||
1897 | } |
||
1898 | break; |
||
1899 | case 1: |
||
1900 | { |
||
1901 | register int i; |
||
1902 | register real *in0 = (real *) hybridIn[0],*in1 = (real *) hybridIn[1]; |
||
1903 | for(i=0;i |
||
1904 | *in0++ = *in1++; |
||
1905 | } |
||
1906 | break; |
||
1907 | } |
||
1908 | } |
||
1909 | |||
1910 | for(ch=0;ch |
||
1911 | struct gr_info_s *gr_info = &(sideinfo.ch[ch].gr[gr]); |
||
1912 | III_antialias(hybridIn[ch],gr_info); |
||
1913 | #ifdef USE_3DNOW |
||
1914 | III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info,fr); |
||
1915 | #else |
||
1916 | III_hybrid(hybridIn[ch], hybridOut[ch], ch,gr_info); |
||
1917 | #endif |
||
1918 | } |
||
1919 | |||
1920 | #ifdef I486_OPT |
||
1921 | if (fr->synth != synth_1to1 || single >= 0) { |
||
1922 | #endif |
||
1923 | for(ss=0;ss |
||
1924 | if(single >= 0) { |
||
1925 | clip += (fr->synth_mono)(hybridOut[0][ss],pcm_sample,pcm_point); |
||
1926 | } |
||
1927 | else { |
||
1928 | int p1=*pcm_point; |
||
1929 | clip += (fr->synth)(hybridOut[0][ss],0,pcm_sample,&p1); |
||
1930 | clip += (fr->synth)(hybridOut[1][ss],1,pcm_sample,pcm_point); |
||
1931 | } |
||
1932 | |||
1933 | #ifdef VARMODESUPPORT |
||
1934 | if (playlimit < 128) { |
||
1935 | pcm_point -= playlimit >> 1; |
||
1936 | playlimit = 0; |
||
1937 | } |
||
1938 | else |
||
1939 | playlimit -= 128; |
||
1940 | #endif |
||
1941 | } |
||
1942 | #ifdef I486_OPT |
||
1943 | } else { |
||
1944 | /* Only stereo, 16 bits benefit from the 486 optimization. */ |
||
1945 | ss=0; |
||
1946 | while (ss < SSLIMIT) { |
||
1947 | int n; |
||
1948 | n=(0x40000 - *pcm_point) / (2*2*32); |
||
1949 | if (n > (SSLIMIT-ss)) n=SSLIMIT-ss; |
||
1950 | |||
1951 | synth_1to1_486(hybridOut[0][ss],0,pcm_sample+*pcm_point,n); |
||
1952 | synth_1to1_486(hybridOut[1][ss],1,pcm_sample+*pcm_point,n); |
||
1953 | ss+=n; |
||
1954 | *pcm_point+=(2*2*32)*n; |
||
1955 | } |
||
1956 | } |
||
1957 | #endif |
||
1958 | } |
||
1959 | |||
1960 | return clip; |
||
1961 | }>> |