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1 (ns com.aurellem.gb.vbm
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2 (:import java.io.File)
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3 (:import org.apache.commons.io.FileUtils)
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4 (:use com.aurellem.gb.gb-driver))
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5
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6 ;;;;;;;;;;;;; read vbm file
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7
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8 (def ^:dynamic *moves-cache*
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9 (File. user-home "proj/vba-clojure/moves/"))
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10
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11 (defn buttons [mask]
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12 (loop [buttons []
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13 masks (seq (dissoc button-code :listen))]
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14 (if (empty? masks) buttons
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15 (let [[button value] (first masks)]
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16 (if (not= 0x0000 (bit-and value mask))
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17 (recur (conj buttons button) (rest masks))
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18 (recur buttons (rest masks)))))))
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19
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20 (defn vbm-bytes [#^File vbm]
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21 (let [bytes (FileUtils/readFileToByteArray vbm)
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22 ints (int-array (count bytes))]
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23 (areduce bytes idx _ nil
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24 (aset ints idx
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25 (bit-and 0xFF (aget bytes idx))))
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26 ints))
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27
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28 (def vbm-header-length 255)
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29
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30 (defn repair-vbm
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31 "Two 0's must be inserted after every reset."
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32 [vbm-masks]
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33 (loop [fixed []
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34 pending vbm-masks]
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35 (if (empty? pending) fixed
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36 (let [mask (first pending)]
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37 (if (not= 0x0000 (bit-and mask (button-code :restart)))
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38 (recur (conj fixed mask 0x0000 0x0000) (next pending))
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39 (recur (conj fixed mask) (next pending)))))))
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40
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41 (defn vbm-masks [#^File vbm]
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42 (repair-vbm
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43 (map (fn [[a b]]
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44 (+ (bit-shift-left a 8) b))
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45 (partition
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46 2 (drop vbm-header-length (vbm-bytes vbm))))))
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47
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48 (defn vbm-buttons [#^File vbm]
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49 (map buttons (vbm-masks vbm)))
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50
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51 (defn convert-buttons
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52 "To write a vbm file, we must remove the last two buttons after any
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53 reset event."
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54 [buttons]
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55 (loop [fixed []
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56 pending buttons]
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57 (if (empty? pending) fixed
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58 (let [mask (first pending)]
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59 (if (contains? (set (first pending)) :reset)
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60 (recur (conj fixed mask) (drop 3 pending))
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61 (recur (conj fixed mask) (next pending)))))))
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62
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63 (defn moves-filename [name]
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64 (File. *moves-cache* (format "%s.vbm" name)))
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65
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66 (defn read-moves [name]
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67 (let [target (moves-filename name)]
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68 (if (.exists target)
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69 (vbm-buttons target))))
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70 ;;;;;;;;;;;;;; write moves to vbm file
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71
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72
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73 (def vbm-header
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74 (byte-array
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75 (map
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76 byte
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77 [86 66 77 26 1 0 0 0 105 74 88 79 89 1 0 0 0 0 0 0 0 1 2 112 0 0 0
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78 0 0 0 0 0 1 0 0 0 80 79 75 69 77 79 78 32 89 69 76 76 1 -105 124 4
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79 3 0 0 0 0 0 0 0 0 1 0 0 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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80 95 95 82 111 98 101 114 116 32 32 77 99 73 110 116 121 114 101 95
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81 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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82 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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83 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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84 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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85 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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86 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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87 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95 95
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88 95 95 95 95])))
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89
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90 (def vbm-trailer
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91 (byte-array
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92 (map byte [0])))
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93
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94 (defn buttons->vbm-bytes [buttons]
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95 (let [bytes-in-ints
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96 (map button-mask (convert-buttons buttons))
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97 high-bits (map #(bit-shift-right (bit-and 0xFF00 %) 8)
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98 bytes-in-ints)
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99 low-bits (map #(bit-and 0xFF %) bytes-in-ints)
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100 convert-byte (fn [i] (byte (if (>= i 128) (- i 256) i)))
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101 contents
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102 (byte-array
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103 (concat
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104 vbm-header
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105 (map convert-byte (interleave high-bits low-bits))
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106 vbm-trailer))]
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107 contents))
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108
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109 (defn write-moves! [moves name]
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110 (let [target (moves-filename name)]
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111 (clojure.java.io/copy (buttons->vbm-bytes moves) target)
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112 target))
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113
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114 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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115
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116 (use 'clojure.java.shell)
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117
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118 (def vba-linux (File. user-home "bin/vba-linux"))
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119
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120 (defn play-vbm [#^File vbm]
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121 (.delete yellow-save-file)
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122 (if (.exists vbm)
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123 (sh (.getCanonicalPath vba-linux)
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124 (str "--playmovie=" (.getCanonicalPath vbm))
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125 (.getCanonicalPath yellow-rom-image)))
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126 nil)
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127
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