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annotate Orchestland/Assets/LeapMotion/Scripts/Utils/LeapRecorder.cs @ 1:f7675884f2a1
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author | Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2015 23:09:20 +0900 |
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1
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1 /******************************************************************************\ |
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2 * Copyright (C) Leap Motion, Inc. 2011-2014. * |
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3 * Leap Motion proprietary. Licensed under Apache 2.0 * |
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4 * Available at http://www.apache.org/licenses/LICENSE-2.0.html * |
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5 \******************************************************************************/ |
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6 |
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7 using UnityEngine; |
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8 using System; |
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9 using System.IO; |
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10 using System.Collections.Generic; |
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11 using Leap; |
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12 |
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13 /** The states of the record-playback machine. */ |
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14 public enum RecorderState { |
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15 Idling = 0, |
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16 Recording = 1, |
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17 Playing = 2 |
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18 } |
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19 |
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20 /** |
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21 * Maintains a buffer of recorded frames and tracks the state of playback and recording. |
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22 */ |
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23 public class LeapRecorder { |
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24 |
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25 /** Playback speed. */ |
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26 public float speed = 1.0f; |
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27 /** Whether to lop back to the beginning when the last recorded frame is played.*/ |
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28 public bool loop = true; |
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29 /** The current play state. */ |
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30 public RecorderState state = RecorderState.Playing; |
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31 |
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32 protected List<byte[]> frames_; |
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33 protected float frame_index_; |
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34 protected Frame current_frame_ = new Frame(); |
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35 |
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36 /** Creates a new LeapRecorder object. This doesn't make sense outside the context of a HandController object. */ |
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37 public LeapRecorder() { |
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38 Reset(); |
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39 } |
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40 |
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41 /** Sets the play state to idle. */ |
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42 public void Stop() { |
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43 state = RecorderState.Idling; |
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44 frame_index_ = 0.0f; |
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45 } |
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46 |
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47 /** Sets the play state to idle. */ |
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48 public void Pause() { |
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49 state = RecorderState.Idling; |
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50 } |
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51 |
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52 /** Sets the play state to playing. */ |
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53 public void Play() { |
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54 state = RecorderState.Playing; |
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55 } |
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56 |
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57 /** Sets the play state to recording. */ |
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58 public void Record() { |
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59 state = RecorderState.Recording; |
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60 } |
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61 |
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62 /** Discards any recorded frames. */ |
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63 public void Reset() { |
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64 frames_ = new List<byte[]>(); |
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65 frame_index_ = 0; |
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66 } |
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67 |
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68 /** Restores the default behaviors. */ |
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69 public void SetDefault() { |
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70 speed = 1.0f; |
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71 loop = true; |
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72 } |
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73 |
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74 /** Returns the ratio of the current playback position to the total recording length. */ |
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75 public float GetProgress() { |
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76 return frame_index_ / frames_.Count; |
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77 } |
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78 |
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79 /** Returns the playback position. */ |
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80 public int GetIndex() { |
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81 return (int)frame_index_; |
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82 } |
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83 |
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84 /** |
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85 * Sets the playback position to the specified frame count (or the last frame if the |
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86 * specified index is after the last frame. |
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87 */ |
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88 public void SetIndex(int new_index) { |
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89 if (new_index >= frames_.Count) { |
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90 frame_index_ = frames_.Count - 1; |
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91 } |
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92 else { |
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93 frame_index_ = new_index; |
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94 } |
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95 } |
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96 |
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97 /** Serializes a Leap Frame object and adds it to the end of the recording. */ |
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98 public void AddFrame(Frame frame) { |
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99 frames_.Add(frame.Serialize); |
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100 } |
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101 |
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102 /** Returns the current frame without advancing the playhead. This frame could be invalid. */ |
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103 public Frame GetCurrentFrame() { |
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104 return current_frame_; |
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105 } |
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106 |
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107 /** Advances the playhead, deserializes the frame, and returns it.*/ |
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108 public Frame NextFrame() { |
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109 current_frame_ = new Frame(); |
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110 if (frames_.Count > 0) { |
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111 if (frame_index_ >= frames_.Count && loop) { |
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112 frame_index_ -= frames_.Count; |
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113 } |
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114 else if (frame_index_ < 0 && loop) { |
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115 frame_index_ += frames_.Count; |
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116 } |
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117 if (frame_index_ < frames_.Count && frame_index_ >= 0) { |
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118 current_frame_.Deserialize(frames_[(int)frame_index_]); |
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119 frame_index_ += speed; |
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120 } |
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121 } |
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122 return current_frame_; |
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123 } |
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124 |
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125 /** Deserializes all the recorded frames and returns them in a new list. */ |
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126 public List<Frame> GetFrames() { |
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127 List<Frame> frames = new List<Frame>(); |
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128 for (int i = 0; i < frames_.Count; ++i) { |
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129 Frame frame = new Frame(); |
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130 frame.Deserialize(frames_[i]); |
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131 frames.Add(frame); |
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132 } |
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133 return frames; |
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134 } |
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135 |
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136 /** The number of recorded frames. */ |
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137 public int GetFramesCount() { |
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138 return frames_.Count; |
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139 } |
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140 |
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141 /** Saves the recorded frames to a file, overwriting an existing file. */ |
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142 public string SaveToNewFile() { |
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143 string path = Application.persistentDataPath + "/Recording_" + |
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144 System.DateTime.Now.ToString("yyyyMMdd_hhmmss") + ".bytes"; |
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145 |
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146 if (File.Exists(@path)) { |
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147 File.Delete(@path); |
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148 } |
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149 |
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150 FileStream stream = new FileStream(path, FileMode.Append, FileAccess.Write); |
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151 for (int i = 0; i < frames_.Count; ++i) { |
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152 byte[] frame_size = new byte[4]; |
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153 frame_size = System.BitConverter.GetBytes(frames_[i].Length); |
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154 stream.Write(frame_size, 0, frame_size.Length); |
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155 stream.Write(frames_[i], 0, frames_[i].Length); |
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156 } |
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157 |
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158 stream.Close(); |
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159 return path; |
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160 } |
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161 |
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162 /** Loads saved frames from a file. */ |
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163 public void Load(TextAsset text_asset) { |
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164 byte[] data = text_asset.bytes; |
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165 frame_index_ = 0; |
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166 frames_.Clear(); |
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167 int i = 0; |
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168 while (i < data.Length) { |
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169 byte[] frame_size = new byte[4]; |
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170 Array.Copy(data, i, frame_size, 0, frame_size.Length); |
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171 i += frame_size.Length; |
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172 byte[] frame = new byte[System.BitConverter.ToUInt32(frame_size, 0)]; |
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173 Array.Copy(data, i, frame, 0, frame.Length); |
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174 i += frame.Length; |
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175 frames_.Add(frame); |
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176 } |
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177 } |
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178 } |