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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@devolution.com |
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21 */ |
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22 |
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23 /* |
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24 SDL_epocaudio.cpp |
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25 Epoc based SDL audio driver implementation |
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26 |
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27 Markus Mertama |
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28 */ |
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29 |
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30 #ifdef SAVE_RCSID |
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31 static char rcsid = |
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32 "@(#) $Id: SDL_epocaudio.c,v 0.0.0.0 2001/06/19 17:19:56 hercules Exp $"; |
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33 #endif |
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34 |
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35 |
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36 #include <stdlib.h> |
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37 #include <stdio.h> |
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38 #include <string.h> |
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39 #include <errno.h> |
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40 #include <unistd.h> |
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41 #include <fcntl.h> |
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42 #include <signal.h> |
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43 #include <sys/time.h> |
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44 #include <sys/ioctl.h> |
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45 #include <sys/stat.h> |
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46 |
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47 #include "epoc_sdl.h" |
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48 |
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49 #include <e32hal.h> |
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50 |
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51 |
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52 extern "C" { |
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53 #include "SDL_audio.h" |
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54 #include "SDL_error.h" |
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55 #include "SDL_audiomem.h" |
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56 #include "SDL_audio_c.h" |
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57 #include "SDL_timer.h" |
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58 #include "SDL_audiodev_c.h" |
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59 } |
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60 |
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61 #include "SDL_epocaudio.h" |
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62 |
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63 #include "streamplayer.h" |
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64 |
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65 |
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66 //#define DEBUG_AUDIO |
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67 |
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68 |
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69 /* Audio driver functions */ |
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70 |
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71 static int EPOC_OpenAudio(SDL_AudioDevice *thisdevice, SDL_AudioSpec *spec); |
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72 static void EPOC_WaitAudio(SDL_AudioDevice *thisdevice); |
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73 static void EPOC_PlayAudio(SDL_AudioDevice *thisdevice); |
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74 static Uint8 *EPOC_GetAudioBuf(SDL_AudioDevice *thisdevice); |
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75 static void EPOC_CloseAudio(SDL_AudioDevice *thisdevice); |
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76 static void EPOC_ThreadInit(SDL_AudioDevice *thisdevice); |
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77 |
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78 static int Audio_Available(void); |
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79 static SDL_AudioDevice *Audio_CreateDevice(int devindex); |
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80 static void Audio_DeleteDevice(SDL_AudioDevice *device); |
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81 |
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82 |
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83 //void sos_adump(SDL_AudioDevice* thisdevice, void* data, int len); |
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84 |
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85 #ifdef __WINS__ |
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86 #define DODUMP |
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87 #endif |
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88 |
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89 #ifdef DODUMP |
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90 NONSHARABLE_CLASS(TDump) |
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91 { |
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92 public: |
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93 TInt Open(); |
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94 void Close(); |
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95 void Dump(const TDesC8& aDes); |
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96 private: |
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97 RFile iFile; |
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98 RFs iFs; |
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99 }; |
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100 |
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101 TInt TDump::Open() |
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102 { |
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103 TInt err = iFs.Connect(); |
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104 if(err == KErrNone) |
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105 { |
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106 #ifdef __WINS__ |
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107 _LIT(target, "C:\\sdlau.raw"); |
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108 #else |
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109 _LIT(target, "E:\\sdlau.raw"); |
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110 #endif |
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111 err = iFile.Replace(iFs, target, EFileWrite); |
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112 } |
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113 return err; |
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114 } |
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115 void TDump::Close() |
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116 { |
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117 iFile.Close(); |
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118 iFs.Close(); |
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119 } |
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120 void TDump::Dump(const TDesC8& aDes) |
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121 { |
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122 iFile.Write(aDes); |
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123 } |
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124 #endif |
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125 |
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126 |
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127 NONSHARABLE_CLASS(CSimpleWait) : public CTimer |
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128 { |
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129 public: |
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130 void Wait(TTimeIntervalMicroSeconds32 aWait); |
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131 static CSimpleWait* NewL(); |
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132 private: |
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133 CSimpleWait(); |
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134 void RunL(); |
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135 }; |
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136 |
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137 |
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138 CSimpleWait* CSimpleWait::NewL() |
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139 { |
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140 CSimpleWait* wait = new (ELeave) CSimpleWait(); |
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141 CleanupStack::PushL(wait); |
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142 wait->ConstructL(); |
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143 CleanupStack::Pop(); |
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144 return wait; |
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145 } |
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146 |
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147 void CSimpleWait::Wait(TTimeIntervalMicroSeconds32 aWait) |
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148 { |
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149 After(aWait); |
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150 CActiveScheduler::Start(); |
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151 } |
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152 |
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153 CSimpleWait::CSimpleWait() : CTimer(CActive::EPriorityStandard) |
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154 { |
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155 CActiveScheduler::Add(this); |
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156 } |
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157 |
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158 void CSimpleWait::RunL() |
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159 { |
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160 CActiveScheduler::Stop(); |
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161 } |
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162 |
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163 const TInt KAudioBuffers(2); |
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164 |
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165 |
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166 NONSHARABLE_CLASS(CEpocAudio) : public CBase, public MStreamObs, public MStreamProvider |
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167 { |
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168 public: |
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169 static void* NewL(TInt BufferSize, TInt aFill); |
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170 inline static CEpocAudio& Current(SDL_AudioDevice* thisdevice); |
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171 |
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172 static void Free(SDL_AudioDevice* thisdevice); |
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173 |
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174 void Wait(); |
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175 void Play(); |
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176 // void SetBuffer(const TDesC8& aBuffer); |
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177 void ThreadInitL(TAny* aDevice); |
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178 void Open(TInt iRate, TInt iChannels, TUint32 aType, TInt aBytes); |
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179 ~CEpocAudio(); |
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180 TUint8* Buffer(); |
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181 TBool SetPause(TBool aPause); |
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182 #ifdef DODUMP |
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183 void Dump(const TDesC8& aBuf) {iDump.Dump(aBuf);} |
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184 #endif |
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185 private: |
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186 CEpocAudio(TInt aBufferSize); |
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187 void Complete(TInt aState, TInt aError); |
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188 TPtrC8 Data(); |
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189 void ConstructL(TInt aFill); |
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190 private: |
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191 TInt iBufferSize; |
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192 CStreamPlayer* iPlayer; |
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193 TInt iBufferRate; |
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194 TInt iRate; |
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195 TInt iChannels; |
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196 TUint32 iType; |
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197 TInt iPosition; |
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198 TThreadId iTid; |
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199 TUint8* iAudioPtr; |
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200 TUint8* iBuffer; |
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201 // TTimeIntervalMicroSeconds iStart; |
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202 TTime iStart; |
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203 TInt iTune; |
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204 CSimpleWait* iWait; |
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205 #ifdef DODUMP |
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206 TDump iDump; |
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207 #endif |
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208 }; |
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209 |
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210 inline CEpocAudio& CEpocAudio::Current(SDL_AudioDevice* thisdevice) |
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211 { |
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212 return *static_cast<CEpocAudio*>((void*)thisdevice->hidden); |
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213 } |
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214 |
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215 /* |
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216 |
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217 TBool EndSc(TAny*) |
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218 { |
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219 CActiveScheduler::Stop(); |
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220 } |
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221 |
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222 LOCAL_C void CleanScL() |
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223 { |
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224 CIdle* d = CIdle::NewLC(CActive:::EPriorityIdle); |
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225 d->Start(TCallBack(EndSc)); |
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226 CActiveScheduler::Start(); |
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227 |
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228 } |
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229 */ |
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230 |
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231 void CEpocAudio::Free(SDL_AudioDevice* thisdevice) |
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232 { |
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233 CEpocAudio* ea = static_cast<CEpocAudio*>((void*)thisdevice->hidden); |
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234 if(ea) |
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235 { |
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236 ASSERT(ea->iTid == RThread().Id()); |
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237 delete ea; |
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238 thisdevice->hidden = NULL; |
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239 |
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240 CActiveScheduler* as = CActiveScheduler::Current(); |
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241 ASSERT(as->StackDepth() == 0); |
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242 delete as; |
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243 CActiveScheduler::Install(NULL); |
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244 } |
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245 ASSERT(thisdevice->hidden == NULL); |
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246 } |
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247 |
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248 CEpocAudio::CEpocAudio(TInt aBufferSize) : iBufferSize(aBufferSize), iPosition(-1) |
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249 { |
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250 } |
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251 |
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252 void* CEpocAudio::NewL(TInt aBufferSize, TInt aFill) |
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253 { |
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254 CEpocAudio* eAudioLib = new (ELeave) CEpocAudio(aBufferSize); |
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255 CleanupStack::PushL(eAudioLib); |
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256 eAudioLib->ConstructL(aFill); |
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257 CleanupStack::Pop(); |
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258 return eAudioLib; |
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259 } |
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260 |
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261 void CEpocAudio::ConstructL(TInt aFill) |
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262 { |
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263 iBuffer = (TUint8*) User::AllocL(KAudioBuffers * iBufferSize); |
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264 memset(iBuffer, aFill, KAudioBuffers * iBufferSize); |
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265 iAudioPtr = iBuffer; |
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266 } |
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267 |
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268 |
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269 TBool CEpocAudio::SetPause(TBool aPause) |
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270 { |
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271 if(aPause && iPosition >= 0) |
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272 { |
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273 iPosition = -1; |
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274 if(iPlayer != NULL) |
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275 iPlayer->Stop(); |
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276 } |
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277 if(!aPause && iPosition < 0) |
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278 { |
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279 iPosition = 0; |
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280 if(iPlayer != NULL) |
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281 iPlayer->Start(); |
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282 } |
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283 return iPosition < 0; |
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284 } |
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285 |
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286 void CEpocAudio::ThreadInitL(TAny* aDevice) |
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287 { |
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288 iTid = RThread().Id(); |
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289 CActiveScheduler* as = new (ELeave) CActiveScheduler(); |
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290 CActiveScheduler::Install(as); |
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291 |
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292 EpocSdlEnv::AppendCleanupItem(TSdlCleanupItem((TSdlCleanupOperation)EPOC_CloseAudio, aDevice)); |
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293 |
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294 iWait = CSimpleWait::NewL(); |
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295 |
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296 iPlayer = new (ELeave) CStreamPlayer(*this, *this); |
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297 iPlayer->ConstructL(); |
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298 iPlayer->OpenStream(iRate, iChannels, iType); |
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299 |
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300 #ifdef DODUMP |
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301 User::LeaveIfError(iDump.Open()); |
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302 #endif |
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303 } |
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304 |
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305 |
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306 |
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307 TUint8* CEpocAudio::Buffer() |
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308 { |
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309 iStart.UniversalTime(); |
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310 // iStart = iPlayer->Position(); |
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311 return iAudioPtr; |
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312 |
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313 } |
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314 |
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315 CEpocAudio::~CEpocAudio() |
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316 { |
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317 if(iWait != NULL) |
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318 iWait->Cancel(); |
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319 delete iWait; |
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320 if(iPlayer != NULL) |
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321 iPlayer->Close(); |
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322 delete iPlayer; |
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323 delete iBuffer; |
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324 } |
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325 |
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326 void CEpocAudio::Complete(TInt aState, TInt aError) |
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327 { |
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328 if(aState == MStreamObs::EClose) |
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329 { |
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330 } |
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331 if(iPlayer->Closed()) |
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332 return; |
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333 switch(aError) |
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334 { |
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335 case KErrUnderflow: |
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336 case KErrInUse: |
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337 iPlayer->Start(); |
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338 break; |
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339 case KErrAbort: |
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340 iPlayer->Open(); |
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341 } |
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342 } |
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343 |
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344 |
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345 void sos_adump(SDL_AudioDevice* thisdevice, void* data, int len) |
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346 { |
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347 #ifdef DODUMP |
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348 const TPtrC8 buf((TUint8*)data, len); |
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349 CEpocAudio::Current(thisdevice).Dump(buf); |
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350 #endif |
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351 } |
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352 |
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353 const TInt KClip(256); |
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354 |
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355 TPtrC8 CEpocAudio::Data() |
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356 { |
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357 if(iPosition < 0) |
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358 return KNullDesC8(); |
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359 |
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360 TPtrC8 data(iAudioPtr + iPosition, KClip); |
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361 |
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362 #ifdef DODUMP |
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363 iDump.Dump(data); |
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364 #endif |
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365 |
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366 iPosition += KClip; |
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367 if(iPosition >= iBufferSize) |
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368 { |
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369 |
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370 /* if(iAudioPtr == iBuffer) |
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371 iAudioPtr = iBuffer + iBufferSize; |
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372 else |
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373 iAudioPtr = iBuffer; |
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374 */ |
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375 iAudioPtr += iBufferSize; |
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376 |
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377 if((iAudioPtr - iBuffer) >= KAudioBuffers * iBufferSize) |
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378 iAudioPtr = iBuffer; |
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379 |
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380 iPosition = -1; |
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381 if(iWait->IsActive()) |
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382 { |
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383 iWait->Cancel(); |
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384 CActiveScheduler::Stop(); |
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385 } |
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386 } |
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387 return data; |
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388 } |
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389 |
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390 |
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391 |
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392 |
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393 void CEpocAudio::Play() |
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394 { |
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395 iPosition = 0; |
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396 } |
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397 |
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398 void CEpocAudio::Wait() |
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399 { |
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400 if(iPosition >= 0 /*&& iPlayer->Playing()*/) |
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401 { |
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402 const TInt64 bufMs = TInt64(iBufferSize - KClip) * TInt64(1000000); |
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403 const TInt64 specTime = bufMs / TInt64(iRate * iChannels * 2); |
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404 iWait->After(specTime); |
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405 |
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406 CActiveScheduler::Start(); |
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407 TTime end; |
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408 end.UniversalTime(); |
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409 const TTimeIntervalMicroSeconds delta = end.MicroSecondsFrom(iStart); |
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410 |
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411 |
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412 // const TTimeIntervalMicroSeconds end = iPlayer->Position(); |
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413 |
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414 |
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415 |
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416 |
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417 const TInt diff = specTime - delta.Int64(); |
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418 |
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419 if(diff > 0 && diff < 200000) |
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420 { |
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421 User::After(diff); |
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422 } |
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423 |
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424 } |
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425 else |
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426 { |
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427 User::After(10000); |
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428 // iWait->Wait(10000); //just give some time... |
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429 } |
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430 } |
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431 |
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432 void CEpocAudio::Open(TInt aRate, TInt aChannels, TUint32 aType, TInt aBytes) |
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433 { |
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434 iRate = aRate; |
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435 iChannels = aChannels; |
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436 iType = aType; |
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437 iBufferRate = iRate * iChannels * aBytes; //1/x |
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438 } |
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439 |
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440 |
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441 /* Audio driver bootstrap functions */ |
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442 |
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443 AudioBootStrap EPOCAudio_bootstrap = { |
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444 "epoc\0\0\0", |
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445 "EPOC streaming audio\0\0\0", |
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446 Audio_Available, |
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447 Audio_CreateDevice |
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448 }; |
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449 |
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450 |
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451 static SDL_AudioDevice *Audio_CreateDevice(int /*devindex*/) |
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452 { |
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453 SDL_AudioDevice *thisdevice; |
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454 |
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455 /* Initialize all variables that we clean on shutdown */ |
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456 thisdevice = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
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457 if ( thisdevice ) { |
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458 memset(thisdevice, 0, (sizeof *thisdevice)); |
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459 thisdevice->hidden = NULL; /*(struct SDL_PrivateAudioData *) |
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460 malloc((sizeof thisdevice->hidden)); */ |
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461 } |
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462 if ( (thisdevice == NULL) /*|| (thisdevice->hidden == NULL) */) { |
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463 SDL_OutOfMemory(); |
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464 if ( thisdevice ) { |
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465 free(thisdevice); |
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466 } |
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467 return(0); |
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468 } |
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469 // memset(thisdevice->hidden, 0, (sizeof *thisdevice->hidden)); |
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470 |
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471 /* Set the function pointers */ |
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472 thisdevice->OpenAudio = EPOC_OpenAudio; |
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473 thisdevice->WaitAudio = EPOC_WaitAudio; |
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474 thisdevice->PlayAudio = EPOC_PlayAudio; |
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475 thisdevice->GetAudioBuf = EPOC_GetAudioBuf; |
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476 thisdevice->CloseAudio = EPOC_CloseAudio; |
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477 thisdevice->ThreadInit = EPOC_ThreadInit; |
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478 thisdevice->free = Audio_DeleteDevice; |
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479 |
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480 return thisdevice; |
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481 } |
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482 |
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483 |
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484 static void Audio_DeleteDevice(SDL_AudioDevice *device) |
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485 { |
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486 //free(device->hidden); |
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487 free(device); |
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488 } |
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489 |
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490 static int Audio_Available(void) |
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491 { |
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492 return(1); // Audio stream modules should be always there! |
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493 } |
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494 |
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495 |
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496 static int EPOC_OpenAudio(SDL_AudioDevice *thisdevice, SDL_AudioSpec *spec) |
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497 { |
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498 SDL_TRACE("SDL:EPOC_OpenAudio"); |
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499 |
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500 |
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501 TUint32 type = KMMFFourCCCodePCM16; |
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502 TInt bytes = 2; |
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503 |
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504 switch(spec->format) |
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505 { |
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506 case AUDIO_U16LSB: |
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507 type = KMMFFourCCCodePCMU16; |
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508 break; |
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509 case AUDIO_S16LSB: |
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510 type = KMMFFourCCCodePCM16; |
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511 break; |
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512 case AUDIO_U16MSB: |
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513 type = KMMFFourCCCodePCMU16B; |
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514 break; |
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515 case AUDIO_S16MSB: |
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516 type = KMMFFourCCCodePCM16B; |
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517 break; |
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518 //8 bit not supported! |
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519 case AUDIO_U8: |
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520 case AUDIO_S8: |
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521 default: |
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522 spec->format = AUDIO_S16LSB; |
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523 }; |
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524 |
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525 |
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526 |
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527 if(spec->channels > 2) |
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528 spec->channels = 2; |
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529 |
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530 spec->freq = CStreamPlayer::ClosestSupportedRate(spec->freq); |
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531 |
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532 |
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533 /* Allocate mixing buffer */ |
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534 const TInt buflen = spec->size;// * bytes * spec->channels; |
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535 // audiobuf = NULL; |
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536 |
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537 TRAPD(err, thisdevice->hidden = static_cast<SDL_PrivateAudioData*>(CEpocAudio::NewL(buflen, spec->silence))); |
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538 if(err != KErrNone) |
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539 return -1; |
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540 |
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541 CEpocAudio::Current(thisdevice).Open(spec->freq, spec->channels, type, bytes); |
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542 |
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543 CEpocAudio::Current(thisdevice).SetPause(ETrue); |
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544 |
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545 // isSDLAudioPaused = 1; |
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546 |
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547 thisdevice->enabled = 0; /* enable only after audio engine has been initialized!*/ |
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548 |
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549 /* We're ready to rock and roll. :-) */ |
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550 return(0); |
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551 } |
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552 |
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553 |
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554 static void EPOC_CloseAudio(SDL_AudioDevice* thisdevice) |
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555 { |
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556 #ifdef DEBUG_AUDIO |
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557 SDL_TRACE("Close audio\n"); |
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558 #endif |
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559 |
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560 CEpocAudio::Free(thisdevice); |
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561 } |
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562 |
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563 |
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564 static void EPOC_ThreadInit(SDL_AudioDevice *thisdevice) |
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565 { |
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566 SDL_TRACE("SDL:EPOC_ThreadInit"); |
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567 CEpocAudio::Current(thisdevice).ThreadInitL(thisdevice); |
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568 RThread().SetPriority(EPriorityMore); |
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569 thisdevice->enabled = 1; |
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570 } |
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571 |
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572 /* This function waits until it is possible to write a full sound buffer */ |
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573 static void EPOC_WaitAudio(SDL_AudioDevice* thisdevice) |
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574 { |
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575 #ifdef DEBUG_AUDIO |
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576 SDL_TRACE1("wait %d audio\n", CEpocAudio::AudioLib().StreamPlayer(KSfxChannel).SyncTime()); |
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577 TInt tics = User::TickCount(); |
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578 #endif |
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579 |
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580 CEpocAudio::Current(thisdevice).Wait(); |
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581 |
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582 #ifdef DEBUG_AUDIO |
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583 TInt ntics = User::TickCount() - tics; |
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584 SDL_TRACE1("audio waited %d\n", ntics); |
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585 SDL_TRACE1("audio at %d\n", tics); |
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586 #endif |
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587 } |
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588 |
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589 |
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590 |
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591 static void EPOC_PlayAudio(SDL_AudioDevice* thisdevice) |
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592 { |
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593 if(CEpocAudio::Current(thisdevice).SetPause(SDL_GetAudioStatus() == SDL_AUDIO_PAUSED)) |
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594 SDL_Delay(500); //hold on the busy loop |
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595 else |
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596 CEpocAudio::Current(thisdevice).Play(); |
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597 |
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598 #ifdef DEBUG_AUDIO |
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599 SDL_TRACE("buffer has audio data\n"); |
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600 #endif |
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601 |
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602 |
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603 #ifdef DEBUG_AUDIO |
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604 SDL_TRACE1("Wrote %d bytes of audio data\n", buflen); |
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605 #endif |
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606 } |
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607 |
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608 static Uint8 *EPOC_GetAudioBuf(SDL_AudioDevice* thisdevice) |
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609 { |
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610 return CEpocAudio::Current(thisdevice).Buffer(); |
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611 } |
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612 |
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613 |
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614 |