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Rev | Author | Line No. | Line |
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1 | daniel-mar | 1 | unit Wave; |
2 | |||
3 | interface |
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4 | |||
5 | {$INCLUDE DelphiXcfg.inc} |
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6 | |||
7 | uses |
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8 | Windows, SysUtils, Classes, MMSystem; |
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9 | |||
10 | type |
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11 | |||
12 | { EWaveError } |
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13 | |||
14 | EWaveError = class(Exception); |
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15 | |||
16 | { TWave } |
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17 | |||
18 | TWave = class(TPersistent) |
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19 | private |
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20 | FData: Pointer; |
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21 | FFormat: PWaveFormatEx; |
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22 | FFormatSize: Integer; |
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23 | FSize: Integer; |
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24 | procedure SetFormatSize(Value: Integer); |
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25 | procedure SetSize(Value: Integer); |
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26 | protected |
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27 | procedure DefineProperties(Filer: TFiler); override; |
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28 | procedure ReadData(Stream: TStream); virtual; |
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29 | procedure WriteData(Stream: TStream); virtual; |
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30 | public |
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31 | destructor Destroy; override; |
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32 | procedure Assign(Source: TPersistent); override; |
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33 | procedure Clear; |
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34 | procedure LoadFromFile(const FileName : string); |
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35 | procedure LoadFromStream(Stream: TStream); |
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36 | procedure SaveToFile(const FileName : string); |
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37 | procedure SaveToStream(Stream: TStream); |
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38 | procedure SetPCMFormat(SamplesPerSec, BitsPerSample, Channels: Integer); |
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39 | property Data: Pointer read FData; |
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40 | property Format: PWaveFormatEx read FFormat; |
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41 | property FormatSize: Integer read FFormatSize write SetFormatSize; |
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42 | property Size: Integer read FSize write SetSize; |
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43 | end; |
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44 | |||
45 | { TCustomDXWave } |
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46 | |||
47 | TCustomDXWave = class(TComponent) |
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48 | private |
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49 | FWave: TWave; |
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50 | procedure SetWave(Value: TWave); |
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51 | public |
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52 | constructor Create(AOnwer: TComponent); override; |
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53 | destructor Destroy; override; |
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54 | property Wave: TWave read FWave write SetWave; |
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55 | end; |
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56 | |||
57 | { TDXWave } |
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58 | |||
59 | TDXWave = class(TCustomDXWave) |
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60 | published |
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61 | property Wave; |
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62 | end; |
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63 | |||
64 | { EWaveStreamError } |
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65 | |||
66 | EWaveStreamError = class(Exception); |
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67 | |||
68 | { TCustomWaveStream } |
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69 | |||
70 | TCustomWaveStream = class(TStream) |
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71 | private |
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72 | FPosition: Integer; |
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73 | protected |
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74 | function GetFilledSize: Integer; virtual; |
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75 | function GetFormat: PWaveFormatEx; virtual; abstract; |
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76 | function GetFormatSize: Integer; virtual; |
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77 | function GetSize: Integer; virtual; |
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78 | function ReadWave(var Buffer; Count: Integer): Integer; virtual; |
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79 | procedure SetFormatSize(Value: Integer); virtual; abstract; |
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80 | procedure SetSize(Value: Integer); override; |
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81 | function WriteWave(const Buffer; Count: Integer): Integer; virtual; |
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82 | public |
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83 | function Read(var Buffer; Count: Longint): Longint; override; |
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84 | function Seek(Offset: Longint; Origin: Word): Longint; override; |
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85 | function Write(const Buffer; Count: Longint): Longint; override; |
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86 | procedure SetPCMFormat(SamplesPerSec, BitsPerSample, Channels: Integer); |
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87 | property FilledSize: Integer read GetFilledSize; |
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88 | property Format: PWaveFormatEx read GetFormat; |
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89 | property FormatSize: Integer read GetFormatSize write SetFormatSize; |
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90 | property Size: Integer read GetSize write SetSize; |
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91 | end; |
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92 | |||
93 | { TCustomWaveStream2 } |
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94 | |||
95 | TCustomWaveStream2 = class(TCustomWaveStream) |
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96 | private |
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97 | FFormat: PWaveFormatEx; |
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98 | FFormatSize: Integer; |
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99 | protected |
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100 | function GetFormat: PWaveFormatEx; override; |
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101 | function GetFormatSize: Integer; override; |
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102 | procedure SetFormatSize(Value: Integer); override; |
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103 | public |
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104 | destructor Destroy; override; |
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105 | end; |
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106 | |||
107 | { TWaveObjectStream } |
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108 | |||
109 | TWaveObjectStream = class(TCustomWaveStream) |
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110 | private |
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111 | FWave: TWave; |
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112 | protected |
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113 | function GetFormat: PWaveFormatEx; override; |
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114 | function GetFormatSize: Integer; override; |
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115 | function GetSize: Integer; override; |
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116 | function ReadWave(var Buffer; Count: Integer): Integer; override; |
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117 | procedure SetFormatSize(Value: Integer); override; |
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118 | procedure SetSize(Value: Integer); override; |
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119 | function WriteWave(const Buffer; Count: Integer): Integer; override; |
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120 | public |
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121 | constructor Create(AWave: TWave); |
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122 | end; |
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123 | |||
124 | { TWaveStream } |
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125 | |||
126 | TWaveStream = class(TCustomWaveStream2) |
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127 | private |
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128 | FDataPosition: Integer; |
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129 | FDataHeaderPosition: Integer; |
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130 | FOpened: Boolean; |
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131 | FOriPosition: Integer; |
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132 | FReadMode: Boolean; |
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133 | FSize: Integer; |
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134 | FStream: TStream; |
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135 | procedure CloseWriteMode; |
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136 | procedure OpenReadMode; |
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137 | procedure OpenWriteMode; |
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138 | protected |
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139 | function GetSize: Integer; override; |
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140 | function ReadWave(var Buffer; Count: Integer): Integer; override; |
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141 | function WriteWave(const Buffer; Count: Integer): Integer; override; |
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142 | public |
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143 | constructor Create(AStream: TStream); |
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144 | destructor Destroy; override; |
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145 | procedure Open(WriteMode: Boolean); |
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146 | end; |
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147 | |||
148 | { TWaveFileStream } |
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149 | |||
150 | TWaveFileStream = class(TWaveStream) |
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151 | private |
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152 | FFileStream: TFileStream; |
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153 | public |
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154 | constructor Create(const FileName: string; FileMode: Integer); |
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155 | destructor Destroy; override; |
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156 | end; |
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157 | |||
158 | procedure MakePCMWaveFormatEx(var Format: TWaveFormatEx; |
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159 | SamplesPerSec, BitsPerSample, Channels: Integer); |
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160 | |||
161 | implementation |
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162 | |||
163 | uses DXConsts; |
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164 | |||
165 | procedure MakePCMWaveFormatEx(var Format: TWaveFormatEx; |
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166 | SamplesPerSec, BitsPerSample, Channels: Integer); |
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167 | begin |
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168 | with Format do |
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169 | begin |
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170 | wFormatTag := WAVE_FORMAT_PCM; |
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171 | nChannels := Channels; |
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172 | nSamplesPerSec := SamplesPerSec; |
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173 | wBitsPerSample := BitsPerSample; |
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174 | nBlockAlign := nChannels*(wBitsPerSample div 8); |
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175 | nAvgBytesPerSec := nBlockAlign*nSamplesPerSec; |
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176 | cbSize := 0; |
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177 | end; |
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178 | end; |
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179 | |||
180 | { TWave } |
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181 | |||
182 | const |
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183 | WavePoolSize = 8096; |
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184 | |||
185 | destructor TWave.Destroy; |
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186 | begin |
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187 | Clear; |
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188 | inherited Destroy; |
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189 | end; |
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190 | |||
191 | procedure TWave.Assign(Source: TPersistent); |
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192 | var |
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193 | AWave: TWave; |
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194 | begin |
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195 | if Source=nil then |
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196 | begin |
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197 | Clear; |
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198 | end else if Source is TWave then |
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199 | begin |
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200 | if Source<>Self then |
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201 | begin |
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202 | AWave := TWave(Source); |
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203 | Size := AWave.Size; |
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204 | FormatSize := AWave.FormatSize; |
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205 | Move(AWave.Data^, FData^, FSize); |
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206 | Move(AWave.Format^, FFormat^, FFormatSize); |
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207 | end; |
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208 | end else |
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209 | inherited Assign(Source); |
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210 | end; |
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211 | |||
212 | procedure TWave.Clear; |
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213 | begin |
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214 | FreeMem(FData, 0); FData := nil; |
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215 | FreeMem(FFormat, 0); FFormat := nil; |
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216 | |||
217 | FSize := 0; |
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218 | FFormatSize := 0; |
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219 | end; |
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220 | |||
221 | procedure TWave.DefineProperties(Filer: TFiler); |
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222 | begin |
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223 | inherited DefineProperties(Filer); |
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224 | Filer.DefineBinaryProperty('WAVE', ReadData, WriteData, True); |
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225 | end; |
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226 | |||
227 | procedure TWave.LoadFromFile(const FileName : string); |
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228 | var |
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229 | Stream: TFileStream; |
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230 | begin |
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231 | Stream := TFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite); |
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232 | try |
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233 | LoadFromStream(Stream); |
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234 | finally |
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235 | Stream.Free; |
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236 | end; |
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237 | end; |
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238 | |||
239 | procedure TWave.LoadFromStream(Stream: TStream); |
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240 | var |
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241 | WaveStream: TWaveStream; |
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242 | begin |
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243 | Clear; |
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244 | |||
245 | WaveStream := TWaveStream.Create(Stream); |
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246 | try |
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247 | WaveStream.Open(False); |
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248 | |||
249 | FormatSize := WaveStream.FormatSize; |
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250 | Move(WaveStream.Format^, Format^, FormatSize); |
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251 | Size := WaveStream.Size; |
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252 | WaveStream.ReadBuffer(FData^, Size); |
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253 | finally |
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254 | WaveStream.Free; |
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255 | end; |
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256 | end; |
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257 | |||
258 | procedure TWave.ReadData(Stream: TStream); |
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259 | begin |
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260 | LoadFromStream(Stream); |
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261 | end; |
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262 | |||
263 | procedure TWave.SaveToFile(const FileName : string); |
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264 | var |
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265 | Stream: TFileStream; |
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266 | begin |
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267 | Stream := TFileStream.Create(FileName, fmCreate); |
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268 | try |
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269 | SaveToStream(Stream); |
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270 | finally |
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271 | Stream.Free; |
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272 | end; |
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273 | end; |
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274 | |||
275 | procedure TWave.SaveToStream(Stream: TStream); |
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276 | var |
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277 | WaveStream: TWaveStream; |
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278 | begin |
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279 | if (FFormatSize<=0) or (FSize<=0) then Exit; |
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280 | |||
281 | WaveStream := TWaveStream.Create(Stream); |
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282 | try |
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283 | WaveStream.FormatSize := FormatSize; |
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284 | Move(Format^, WaveStream.Format^, FormatSize); |
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285 | |||
286 | WaveStream.Open(True); |
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287 | WaveStream.WriteBuffer(FData^, Size); |
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288 | finally |
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289 | WaveStream.Free; |
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290 | end; |
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291 | end; |
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292 | |||
293 | procedure TWave.SetFormatSize(Value: Integer); |
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294 | begin |
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295 | if Value<=0 then Value := 0; |
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296 | ReAllocMem(FFormat, Value); |
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297 | FFormatSize := Value; |
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298 | end; |
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299 | |||
300 | procedure TWave.SetPCMFormat(SamplesPerSec, BitsPerSample, Channels: Integer); |
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301 | begin |
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302 | FormatSize := SizeOf(TWaveFormatEx); |
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303 | MakePCMWaveFormatEx(Format^, SamplesPerSec, BitsPerSample, Channels); |
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304 | end; |
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305 | |||
306 | procedure TWave.SetSize(Value: Integer); |
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307 | var |
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308 | i: Integer; |
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309 | begin |
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310 | if Value<=0 then Value := 0; |
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311 | |||
312 | i := (Value+WavePoolSize-1) div WavePoolSize; |
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313 | if i<>(FSize+WavePoolSize-1) div WavePoolSize then |
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314 | ReAllocMem(FData, i*WavePoolSize); |
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315 | |||
316 | FSize := Value; |
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317 | end; |
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318 | |||
319 | procedure TWave.WriteData(Stream: TStream); |
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320 | begin |
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321 | SaveToStream(Stream); |
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322 | end; |
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323 | |||
324 | { TCustomDXWave } |
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325 | |||
326 | constructor TCustomDXWave.Create(AOnwer: TComponent); |
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327 | begin |
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328 | inherited Create(AOnwer); |
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329 | FWave := TWave.Create; |
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330 | end; |
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331 | |||
332 | destructor TCustomDXWave.Destroy; |
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333 | begin |
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334 | FWave.Free; |
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335 | inherited Destroy; |
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336 | end; |
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337 | |||
338 | procedure TCustomDXWave.SetWave(Value: TWave); |
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339 | begin |
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340 | FWave.Assign(Value); |
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341 | end; |
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342 | |||
343 | { TCustomWaveStream } |
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344 | |||
345 | function TCustomWaveStream.GetFilledSize: Longint; |
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346 | begin |
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347 | Result := -1; |
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348 | end; |
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349 | |||
350 | function TCustomWaveStream.GetFormatSize: Integer; |
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351 | begin |
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352 | Result := 0; |
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353 | end; |
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354 | |||
355 | function TCustomWaveStream.GetSize: Integer; |
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356 | begin |
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357 | Result := -1; |
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358 | end; |
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359 | |||
360 | function TCustomWaveStream.Read(var Buffer; Count: Longint): Longint; |
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361 | begin |
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362 | if GetSize<0 then |
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363 | Result := ReadWave(Buffer, Count) |
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364 | else |
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365 | begin |
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366 | if FPosition>Size then |
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367 | FPosition := Size; |
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368 | if FPosition+Count>Size then |
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369 | Result := Size-FPosition |
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370 | else |
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371 | Result := Count; |
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372 | |||
373 | Result := ReadWave(Buffer, Result); |
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374 | end; |
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375 | |||
376 | Inc(FPosition, Result); |
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377 | end; |
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378 | |||
379 | function TCustomWaveStream.ReadWave(var Buffer; Count: Integer): Integer; |
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380 | begin |
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381 | Result := 0; |
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382 | end; |
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383 | |||
384 | function TCustomWaveStream.Seek(Offset: Longint; Origin: Word): Longint; |
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385 | begin |
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386 | case Origin of |
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387 | soFromBeginning: FPosition := Offset; |
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388 | soFromCurrent : FPosition := FPosition + Offset; |
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389 | soFromEnd : FPosition := GetSize + Offset; |
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390 | end; |
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391 | if FPosition<0 then FPosition := 0; |
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392 | if FPosition>GetSize then FPosition := GetSize; |
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393 | |||
394 | Result := FPosition; |
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395 | end; |
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396 | |||
397 | procedure TCustomWaveStream.SetPCMFormat(SamplesPerSec, BitsPerSample, Channels: Integer); |
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398 | begin |
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399 | FormatSize := SizeOf(TWaveFormatEx); |
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400 | MakePCMWaveFormatEx(Format^, SamplesPerSec, BitsPerSample, Channels); |
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401 | end; |
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402 | |||
403 | procedure TCustomWaveStream.SetSize(Value: Integer); |
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404 | begin |
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405 | end; |
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406 | |||
407 | function TCustomWaveStream.Write(const Buffer; Count: Longint): Longint; |
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408 | begin |
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409 | if FPosition>Size then |
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410 | FPosition := Size; |
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411 | Result := WriteWave(Buffer, Count); |
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412 | Inc(FPosition, Result); |
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413 | end; |
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414 | |||
415 | function TCustomWaveStream.WriteWave(const Buffer; Count: Integer): Integer; |
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416 | begin |
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417 | Result := 0; |
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418 | end; |
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419 | |||
420 | { TCustomWaveStream2 } |
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421 | |||
422 | destructor TCustomWaveStream2.Destroy; |
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423 | begin |
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424 | FormatSize := 0; |
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425 | inherited Destroy; |
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426 | end; |
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427 | |||
428 | function TCustomWaveStream2.GetFormat: PWaveFormatEx; |
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429 | begin |
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430 | Result := FFormat; |
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431 | end; |
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432 | |||
433 | function TCustomWaveStream2.GetFormatSize: Integer; |
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434 | begin |
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435 | Result := FFormatSize; |
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436 | end; |
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437 | |||
438 | procedure TCustomWaveStream2.SetFormatSize(Value: Integer); |
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439 | begin |
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440 | ReAllocMem(FFormat, Value); |
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441 | FFormatSize := Value; |
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442 | end; |
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443 | |||
444 | { TWaveObjectStream } |
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445 | |||
446 | constructor TWaveObjectStream.Create(AWave: TWave); |
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447 | begin |
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448 | inherited Create; |
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449 | FWave := AWave; |
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450 | |||
451 | FormatSize := FWave.FormatSize; |
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452 | Move(FWave.Format^, Format^, FormatSize); |
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453 | end; |
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454 | |||
455 | function TWaveObjectStream.GetFormat: PWaveFormatEx; |
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456 | begin |
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457 | Result := FWave.Format; |
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458 | end; |
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459 | |||
460 | function TWaveObjectStream.GetFormatSize: Integer; |
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461 | begin |
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462 | Result := FWave.FormatSize; |
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463 | end; |
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464 | |||
465 | function TWaveObjectStream.GetSize: Integer; |
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466 | begin |
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467 | Result := FWave.Size; |
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468 | end; |
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469 | |||
470 | function TWaveObjectStream.ReadWave(var Buffer; Count: Integer): Integer; |
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471 | begin |
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472 | Result := Count; |
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473 | Move(Pointer(Integer(FWave.Data)+Position)^, Buffer, Count); |
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474 | end; |
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475 | |||
476 | procedure TWaveObjectStream.SetFormatSize(Value: Integer); |
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477 | begin |
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478 | FWave.FormatSize := Value; |
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479 | end; |
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480 | |||
481 | procedure TWaveObjectStream.SetSize(Value: Integer); |
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482 | begin |
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483 | FWave.Size := Value; |
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484 | end; |
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485 | |||
486 | function TWaveObjectStream.WriteWave(const Buffer; Count: Integer): Integer; |
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487 | begin |
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488 | Result := Count; |
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489 | if Position+Count>Size then |
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490 | SetSize(Size+(Position+Count+Size)); |
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491 | Move(Buffer, Pointer(Integer(FWave.Data)+Position)^, Count); |
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492 | end; |
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493 | |||
494 | { TWaveStream } |
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495 | |||
496 | const |
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497 | ID_RIFF = Ord('R') + Ord('I')*$100 + Ord('F')*$10000 + Ord('F')*$1000000; |
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498 | ID_WAVE = Ord('W') + Ord('A')*$100 + Ord('V')*$10000 + Ord('E')*$1000000; |
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499 | ID_FMT = Ord('f') + Ord('m')*$100 + Ord('t')*$10000 + Ord(' ')*$1000000; |
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500 | ID_FACT = Ord('f') + Ord('a')*$100 + Ord('c')*$10000 + Ord('t')*$1000000; |
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501 | ID_DATA = Ord('d') + Ord('a')*$100 + Ord('t')*$10000 + Ord('a')*$1000000; |
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502 | |||
503 | type |
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504 | TWaveFileHeader = packed record |
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505 | FType: Integer; |
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506 | Size: Longint; |
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507 | RType: Integer; |
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508 | end; |
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509 | |||
510 | TWaveChunkHeader = packed record |
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511 | CType: Longint; |
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512 | Size: Longint; |
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513 | end; |
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514 | |||
515 | constructor TWaveStream.Create(AStream: TStream); |
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516 | begin |
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517 | inherited Create; |
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518 | FStream := AStream; |
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519 | |||
520 | FOriPosition := FStream.Position; |
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521 | end; |
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522 | |||
523 | destructor TWaveStream.Destroy; |
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524 | begin |
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525 | if FOpened and (not FReadMode) then |
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526 | CloseWriteMode; |
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527 | inherited Destroy; |
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528 | end; |
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529 | |||
530 | function TWaveStream.GetSize: Integer; |
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531 | begin |
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532 | if FOpened then |
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533 | begin |
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534 | if not FReadMode then |
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535 | Result := FStream.Size-FDataPosition |
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536 | else |
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537 | Result := FSize; |
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538 | end else |
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539 | Result := 0; |
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540 | end; |
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541 | |||
542 | function TWaveStream.ReadWave(var Buffer; Count: Integer): Integer; |
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543 | begin |
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544 | if not FOpened then |
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545 | raise EWaveStreamError.Create(SStreamNotOpend); |
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546 | |||
547 | FStream.Position := FDataPosition+Position; |
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548 | Result := FStream.Read(Buffer, Count); |
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549 | end; |
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550 | |||
551 | function TWaveStream.WriteWave(const Buffer; Count: Integer): Integer; |
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552 | begin |
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553 | if not FOpened then |
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554 | raise EWaveStreamError.Create(SStreamNotOpend); |
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555 | |||
556 | if FReadMode then |
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557 | begin |
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558 | if Position+Count>FSize then |
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559 | Count := FSize-Position; |
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560 | end; |
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561 | |||
562 | FStream.Position := FDataPosition+Position; |
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563 | Result := FStream.Write(Buffer, Count); |
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564 | end; |
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565 | |||
566 | procedure TWaveStream.Open(WriteMode: Boolean); |
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567 | begin |
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568 | if WriteMode then |
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569 | OpenWriteMode |
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570 | else |
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571 | OpenReadMode; |
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572 | end; |
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573 | |||
574 | procedure TWaveStream.OpenReadMode; |
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575 | var |
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576 | WF: TWaveFileHeader; |
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577 | WC: TWaveChunkHeader; |
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578 | |||
579 | procedure Readfmt; { fmt } |
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580 | begin |
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581 | FormatSize := WC.Size; |
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582 | FStream.ReadBuffer(Format^, WC.Size); |
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583 | end; |
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584 | |||
585 | procedure Readdata; { data } |
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586 | begin |
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587 | FSize := WC.Size; |
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588 | FDataPosition := FStream.Position; |
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589 | FStream.Seek(FSize, 1); |
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590 | end; |
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591 | |||
592 | begin |
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593 | if FOpened then |
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594 | raise EWaveStreamError.Create(SStreamOpend); |
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595 | |||
596 | FOpened := True; |
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597 | FReadMode := True; |
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598 | |||
599 | FStream.Position := FOriPosition; |
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600 | |||
601 | //if FStream.Size-FStream.Position<=0 then Exit; |
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602 | |||
603 | { File header reading. } |
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604 | FStream.ReadBuffer(WF, SizeOf(TWaveFileHeader)); |
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605 | |||
606 | { Is it Wave file of the file? } |
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607 | if (WF.FType<>ID_RIFF) or (WF.RType<>ID_WAVE) then |
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608 | raise EWaveStreamError.Create(SInvalidWave); |
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609 | |||
610 | { Chunk reading. } |
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611 | FillChar(WC, SizeOf(WC), 0); |
||
612 | FStream.Read(WC, SizeOf(TWaveChunkHeader)); |
||
613 | while WC.CType<>0 do |
||
614 | begin |
||
615 | case WC.CType of |
||
616 | ID_FMT : Readfmt; |
||
617 | ID_DATA: Readdata; |
||
618 | else |
||
619 | { Chunk which does not correspond is disregarded. } |
||
620 | FStream.Seek(WC.Size, 1); |
||
621 | end; |
||
622 | |||
623 | FillChar(WC, SizeOf(WC), 0); |
||
624 | FStream.Read(WC, SizeOf(TWaveChunkHeader)); |
||
625 | end; |
||
626 | end; |
||
627 | |||
628 | procedure TWaveStream.OpenWriteMode; |
||
629 | |||
630 | procedure WriteFmt; { fmt } |
||
631 | var |
||
632 | WC: TWaveChunkHeader; |
||
633 | begin |
||
634 | with WC do |
||
635 | begin |
||
636 | CType := ID_FMT; |
||
637 | Size := FFormatSize; |
||
638 | end; |
||
639 | |||
640 | FStream.WriteBuffer(WC, SizeOf(WC)); |
||
641 | FStream.WriteBuffer(FFormat^, FFormatSize); |
||
642 | end; |
||
643 | |||
644 | procedure WriteData; { data } |
||
645 | var |
||
646 | WC: TWaveChunkHeader; |
||
647 | begin |
||
648 | FDataHeaderPosition := FStream.Position; |
||
649 | |||
650 | with WC do |
||
651 | begin |
||
652 | CType := ID_DATA; |
||
653 | Size := 0; |
||
654 | end; |
||
655 | |||
656 | FStream.WriteBuffer(WC, SizeOf(WC)); |
||
657 | |||
658 | FDataPosition := FStream.Position; |
||
659 | end; |
||
660 | |||
661 | var |
||
662 | WF: TWaveFileHeader; |
||
663 | begin |
||
664 | if FOpened then |
||
665 | raise EWaveStreamError.Create(SStreamOpend); |
||
666 | |||
667 | if FormatSize=0 then |
||
668 | raise EWaveStreamError.Create(SInvalidWaveFormat); |
||
669 | |||
670 | FOpened := True; |
||
671 | FStream.Position := FOriPosition; |
||
672 | |||
673 | FStream.WriteBuffer(WF, SizeOf(TWaveFileHeader)); |
||
674 | |||
675 | { Chunk writing. } |
||
676 | WriteFmt; |
||
677 | WriteData; |
||
678 | end; |
||
679 | |||
680 | procedure TWaveStream.CloseWriteMode; |
||
681 | |||
682 | procedure WriteDataHeader; { data } |
||
683 | var |
||
684 | WC: TWaveChunkHeader; |
||
685 | begin |
||
686 | FStream.Position := FDataHeaderPosition; |
||
687 | |||
688 | with WC do |
||
689 | begin |
||
690 | CType := ID_DATA; |
||
691 | Size := Self.Size; |
||
692 | end; |
||
693 | |||
694 | FStream.WriteBuffer(WC, SizeOf(WC)); |
||
695 | end; |
||
696 | |||
697 | var |
||
698 | WF: TWaveFileHeader; |
||
699 | begin |
||
700 | with WF do |
||
701 | begin |
||
702 | FType := ID_RIFF; |
||
703 | Size := (FStream.Size-FOriPosition)-SizeOf(TWaveChunkHeader); |
||
704 | RType := ID_WAVE; |
||
705 | end; |
||
706 | FStream.Position := FOriPosition; |
||
707 | FStream.WriteBuffer(WF, SizeOf(TWaveFileHeader)); |
||
708 | WriteDataHeader; |
||
709 | FStream.Position := FStream.Size; |
||
710 | end; |
||
711 | |||
712 | { TWaveFileStream } |
||
713 | |||
714 | constructor TWaveFileStream.Create(const FileName: string; FileMode: Integer); |
||
715 | begin |
||
716 | FFileStream := TFileStream.Create(FileName, FileMode); |
||
717 | inherited Create(FFileStream); |
||
718 | end; |
||
719 | |||
720 | destructor TWaveFileStream.Destroy; |
||
721 | begin |
||
722 | inherited Destroy; |
||
723 | FFileStream.Free; |
||
724 | end; |
||
725 | |||
726 | end. |