annotate Orchestland/Assets/LeapMotion/Scripts/Utils/LeapRecorder.cs @ 1:f7675884f2a1

Add Orchestland project
author Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:09:20 +0900
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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 }