1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtMultimedia module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "symbianaudiooutput.h" |
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43 #include "symbianaudioutils.h" |
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44 |
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45 QT_BEGIN_NAMESPACE |
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46 |
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47 //----------------------------------------------------------------------------- |
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48 // Constants |
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49 //----------------------------------------------------------------------------- |
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50 |
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51 const int UnderflowTimerInterval = 50; // ms |
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52 |
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53 |
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54 //----------------------------------------------------------------------------- |
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55 // Private class |
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56 //----------------------------------------------------------------------------- |
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57 |
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58 SymbianAudioOutputPrivate::SymbianAudioOutputPrivate( |
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59 SymbianAudioOutput *audioDevice) |
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60 : m_audioDevice(audioDevice) |
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61 { |
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62 |
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63 } |
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64 |
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65 SymbianAudioOutputPrivate::~SymbianAudioOutputPrivate() |
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66 { |
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67 |
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68 } |
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69 |
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70 qint64 SymbianAudioOutputPrivate::readData(char *data, qint64 len) |
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71 { |
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72 Q_UNUSED(data) |
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73 Q_UNUSED(len) |
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74 return 0; |
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75 } |
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76 |
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77 qint64 SymbianAudioOutputPrivate::writeData(const char *data, qint64 len) |
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78 { |
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79 qint64 totalWritten = 0; |
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80 |
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81 if (m_audioDevice->state() == QAudio::ActiveState || |
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82 m_audioDevice->state() == QAudio::IdleState) { |
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83 |
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84 while (totalWritten < len) { |
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85 const qint64 written = m_audioDevice->pushData(data + totalWritten, |
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86 len - totalWritten); |
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87 if (written > 0) |
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88 totalWritten += written; |
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89 else |
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90 break; |
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91 } |
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92 } |
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93 |
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94 return totalWritten; |
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95 } |
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96 |
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97 |
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98 //----------------------------------------------------------------------------- |
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99 // Public functions |
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100 //----------------------------------------------------------------------------- |
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101 |
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102 SymbianAudioOutput::SymbianAudioOutput(const QByteArray &device, |
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103 const QAudioFormat &format) |
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104 : m_device(device) |
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105 , m_format(format) |
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106 , m_clientBufferSize(SymbianAudio::DefaultBufferSize) |
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107 , m_notifyInterval(SymbianAudio::DefaultNotifyInterval) |
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108 , m_notifyTimer(new QTimer(this)) |
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109 , m_error(QAudio::NoError) |
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110 , m_internalState(SymbianAudio::ClosedState) |
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111 , m_externalState(QAudio::StoppedState) |
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112 , m_pullMode(false) |
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113 , m_source(0) |
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114 , m_devSoundBuffer(0) |
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115 , m_devSoundBufferSize(0) |
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116 , m_bytesWritten(0) |
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117 , m_pushDataReady(false) |
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118 , m_bytesPadding(0) |
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119 , m_underflow(false) |
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120 , m_lastBuffer(false) |
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121 , m_underflowTimer(new QTimer(this)) |
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122 , m_samplesPlayed(0) |
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123 , m_totalSamplesPlayed(0) |
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124 { |
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125 connect(m_notifyTimer.data(), SIGNAL(timeout()), this, SIGNAL(notify())); |
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126 |
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127 SymbianAudio::Utils::formatQtToNative(m_format, m_nativeFourCC, |
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128 m_nativeFormat); |
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129 |
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130 m_underflowTimer->setInterval(UnderflowTimerInterval); |
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131 connect(m_underflowTimer.data(), SIGNAL(timeout()), this, |
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132 SLOT(underflowTimerExpired())); |
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133 } |
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134 |
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135 SymbianAudioOutput::~SymbianAudioOutput() |
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136 { |
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137 close(); |
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138 } |
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139 |
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140 QIODevice* SymbianAudioOutput::start(QIODevice *device) |
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141 { |
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142 stop(); |
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143 |
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144 // We have to set these before the call to open() because of the |
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145 // logic in initializingState() |
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146 if (device) { |
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147 m_pullMode = true; |
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148 m_source = device; |
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149 } |
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150 |
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151 open(); |
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152 |
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153 if (SymbianAudio::ClosedState != m_internalState) { |
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154 if (device) { |
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155 connect(m_source, SIGNAL(readyRead()), this, SLOT(dataReady())); |
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156 } else { |
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157 m_source = new SymbianAudioOutputPrivate(this); |
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158 m_source->open(QIODevice::WriteOnly | QIODevice::Unbuffered); |
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159 } |
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160 |
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161 m_elapsed.restart(); |
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162 } |
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163 |
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164 return m_source; |
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165 } |
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166 |
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167 void SymbianAudioOutput::stop() |
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168 { |
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169 close(); |
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170 } |
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171 |
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172 void SymbianAudioOutput::reset() |
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173 { |
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174 m_totalSamplesPlayed += getSamplesPlayed(); |
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175 m_devSound->Stop(); |
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176 m_bytesPadding = 0; |
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177 startPlayback(); |
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178 } |
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179 |
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180 void SymbianAudioOutput::suspend() |
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181 { |
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182 if (SymbianAudio::ActiveState == m_internalState |
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183 || SymbianAudio::IdleState == m_internalState) { |
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184 m_notifyTimer->stop(); |
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185 m_underflowTimer->stop(); |
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186 |
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187 const qint64 samplesWritten = SymbianAudio::Utils::bytesToSamples( |
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188 m_format, m_bytesWritten); |
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189 m_bytesWritten = 0; |
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190 |
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191 const qint64 samplesPlayed = getSamplesPlayed(); |
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192 |
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193 // CMMFDevSound::Pause() is not guaranteed to work correctly in all |
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194 // implementations, for play-mode DevSound sessions. We therefore |
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195 // have to implement suspend() by calling CMMFDevSound::Stop(). |
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196 // Because this causes buffered data to be dropped, we replace the |
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197 // lost data with silence following a call to resume(), in order to |
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198 // ensure that processedUSecs() returns the correct value. |
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199 m_devSound->Stop(); |
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200 m_totalSamplesPlayed += samplesPlayed; |
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201 |
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202 // Calculate the amount of data dropped |
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203 const qint64 paddingSamples = samplesWritten - samplesPlayed; |
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204 m_bytesPadding = SymbianAudio::Utils::samplesToBytes(m_format, |
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205 paddingSamples); |
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206 |
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207 setState(SymbianAudio::SuspendedState); |
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208 } |
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209 } |
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210 |
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211 void SymbianAudioOutput::resume() |
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212 { |
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213 if (SymbianAudio::SuspendedState == m_internalState) |
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214 startPlayback(); |
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215 } |
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216 |
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217 int SymbianAudioOutput::bytesFree() const |
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218 { |
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219 int result = 0; |
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220 if (m_devSoundBuffer) { |
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221 const TDes8 &outputBuffer = m_devSoundBuffer->Data(); |
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222 result = outputBuffer.MaxLength() - outputBuffer.Length(); |
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223 } |
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224 return result; |
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225 } |
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226 |
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227 int SymbianAudioOutput::periodSize() const |
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228 { |
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229 return bufferSize(); |
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230 } |
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231 |
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232 void SymbianAudioOutput::setBufferSize(int value) |
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233 { |
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234 // Note that DevSound does not allow its client to specify the buffer size. |
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235 // This functionality is available via custom interfaces, but since these |
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236 // cannot be guaranteed to work across all DevSound implementations, we |
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237 // do not use them here. |
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238 // In order to comply with the expected bevahiour of QAudioOutput, we store |
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239 // the value and return it from bufferSize(), but the underlying DevSound |
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240 // buffer size remains unchanged. |
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241 if (value > 0) |
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242 m_clientBufferSize = value; |
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243 } |
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244 |
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245 int SymbianAudioOutput::bufferSize() const |
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246 { |
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247 return m_devSoundBufferSize ? m_devSoundBufferSize : m_clientBufferSize; |
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248 } |
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249 |
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250 void SymbianAudioOutput::setNotifyInterval(int ms) |
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251 { |
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252 if (ms > 0) { |
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253 const int oldNotifyInterval = m_notifyInterval; |
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254 m_notifyInterval = ms; |
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255 if (m_notifyTimer->isActive() && ms != oldNotifyInterval) |
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256 m_notifyTimer->start(m_notifyInterval); |
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257 } |
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258 } |
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259 |
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260 int SymbianAudioOutput::notifyInterval() const |
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261 { |
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262 return m_notifyInterval; |
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263 } |
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264 |
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265 qint64 SymbianAudioOutput::processedUSecs() const |
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266 { |
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267 int samplesPlayed = 0; |
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268 if (m_devSound && SymbianAudio::SuspendedState != m_internalState) |
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269 samplesPlayed = getSamplesPlayed(); |
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270 |
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271 // Protect against division by zero |
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272 Q_ASSERT_X(m_format.frequency() > 0, Q_FUNC_INFO, "Invalid frequency"); |
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273 |
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274 const qint64 result = qint64(1000000) * |
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275 (samplesPlayed + m_totalSamplesPlayed) |
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276 / m_format.frequency(); |
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277 |
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278 return result; |
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279 } |
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280 |
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281 qint64 SymbianAudioOutput::elapsedUSecs() const |
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282 { |
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283 const qint64 result = (QAudio::StoppedState == state()) ? |
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284 0 : m_elapsed.elapsed() * 1000; |
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285 return result; |
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286 } |
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287 |
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288 QAudio::Error SymbianAudioOutput::error() const |
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289 { |
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290 return m_error; |
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291 } |
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292 |
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293 QAudio::State SymbianAudioOutput::state() const |
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294 { |
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295 return m_externalState; |
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296 } |
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297 |
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298 QAudioFormat SymbianAudioOutput::format() const |
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299 { |
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300 return m_format; |
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301 } |
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302 |
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303 //----------------------------------------------------------------------------- |
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304 // MDevSoundObserver implementation |
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305 //----------------------------------------------------------------------------- |
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306 |
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307 void SymbianAudioOutput::InitializeComplete(TInt aError) |
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308 { |
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309 Q_ASSERT_X(SymbianAudio::InitializingState == m_internalState, |
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310 Q_FUNC_INFO, "Invalid state"); |
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311 |
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312 if (KErrNone == aError) |
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313 startPlayback(); |
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314 } |
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315 |
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316 void SymbianAudioOutput::ToneFinished(TInt aError) |
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317 { |
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318 Q_UNUSED(aError) |
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319 // This class doesn't use DevSound's tone playback functions, so should |
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320 // never receive this callback. |
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321 Q_ASSERT_X(false, Q_FUNC_INFO, "Unexpected callback"); |
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322 } |
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323 |
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324 void SymbianAudioOutput::BufferToBeFilled(CMMFBuffer *aBuffer) |
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325 { |
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326 // Following receipt of this callback, DevSound should not provide another |
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327 // buffer until we have returned the current one. |
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328 Q_ASSERT_X(!m_devSoundBuffer, Q_FUNC_INFO, "Buffer already held"); |
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329 |
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330 // Will be returned to DevSound by bufferFilled(). |
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331 m_devSoundBuffer = static_cast<CMMFDataBuffer*>(aBuffer); |
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332 |
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333 if (!m_devSoundBufferSize) |
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334 m_devSoundBufferSize = m_devSoundBuffer->Data().MaxLength(); |
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335 |
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336 writePaddingData(); |
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337 |
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338 if (m_pullMode && isDataReady() && !m_bytesPadding) |
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339 pullData(); |
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340 } |
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341 |
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342 void SymbianAudioOutput::PlayError(TInt aError) |
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343 { |
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344 switch (aError) { |
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345 case KErrUnderflow: |
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346 m_underflow = true; |
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347 if (m_pullMode && !m_lastBuffer) |
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348 setError(QAudio::UnderrunError); |
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349 else |
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350 setState(SymbianAudio::IdleState); |
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351 break; |
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352 default: |
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353 setError(QAudio::IOError); |
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354 break; |
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355 } |
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356 } |
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357 |
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358 void SymbianAudioOutput::BufferToBeEmptied(CMMFBuffer *aBuffer) |
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359 { |
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360 Q_UNUSED(aBuffer) |
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361 // This class doesn't use DevSound in record mode, so should never receive |
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362 // this callback. |
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363 Q_ASSERT_X(false, Q_FUNC_INFO, "Unexpected callback"); |
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364 } |
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365 |
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366 void SymbianAudioOutput::RecordError(TInt aError) |
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367 { |
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368 Q_UNUSED(aError) |
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369 // This class doesn't use DevSound in record mode, so should never receive |
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370 // this callback. |
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371 Q_ASSERT_X(false, Q_FUNC_INFO, "Unexpected callback"); |
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372 } |
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373 |
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374 void SymbianAudioOutput::ConvertError(TInt aError) |
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375 { |
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376 Q_UNUSED(aError) |
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377 // This class doesn't use DevSound's format conversion functions, so |
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378 // should never receive this callback. |
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379 Q_ASSERT_X(false, Q_FUNC_INFO, "Unexpected callback"); |
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380 } |
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381 |
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382 void SymbianAudioOutput::DeviceMessage(TUid aMessageType, const TDesC8 &aMsg) |
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383 { |
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384 Q_UNUSED(aMessageType) |
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385 Q_UNUSED(aMsg) |
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386 // Ignore this callback. |
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387 } |
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388 |
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389 //----------------------------------------------------------------------------- |
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390 // Private functions |
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391 //----------------------------------------------------------------------------- |
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392 |
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393 void SymbianAudioOutput::dataReady() |
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394 { |
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395 // Client-provided QIODevice has data ready to read. |
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396 |
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397 Q_ASSERT_X(m_source->bytesAvailable(), Q_FUNC_INFO, |
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398 "readyRead signal received, but no data available"); |
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399 |
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400 if (!m_bytesPadding) |
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401 pullData(); |
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402 } |
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403 |
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404 void SymbianAudioOutput::underflowTimerExpired() |
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405 { |
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406 const TInt samplesPlayed = getSamplesPlayed(); |
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407 if (m_samplesPlayed && (samplesPlayed == m_samplesPlayed)) { |
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408 setError(QAudio::UnderrunError); |
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409 } else { |
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410 m_samplesPlayed = samplesPlayed; |
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411 m_underflowTimer->start(); |
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412 } |
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413 } |
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414 |
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415 void SymbianAudioOutput::open() |
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416 { |
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417 Q_ASSERT_X(SymbianAudio::ClosedState == m_internalState, |
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418 Q_FUNC_INFO, "DevSound already opened"); |
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419 |
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420 QT_TRAP_THROWING( m_devSound.reset(CMMFDevSound::NewL()) ) |
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421 |
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422 QScopedPointer<SymbianAudio::DevSoundCapabilities> caps( |
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423 new SymbianAudio::DevSoundCapabilities(*m_devSound, |
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424 QAudio::AudioOutput)); |
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425 |
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426 int err = SymbianAudio::Utils::isFormatSupported(m_format, *caps) ? |
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427 KErrNone : KErrNotSupported; |
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428 |
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429 if (KErrNone == err) { |
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430 setState(SymbianAudio::InitializingState); |
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431 TRAP(err, m_devSound->InitializeL(*this, m_nativeFourCC, |
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432 EMMFStatePlaying)); |
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433 } |
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434 |
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435 if (KErrNone != err) { |
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436 setError(QAudio::OpenError); |
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437 m_devSound.reset(); |
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438 } |
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439 } |
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440 |
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441 void SymbianAudioOutput::startPlayback() |
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442 { |
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443 TRAPD(err, startDevSoundL()); |
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444 if (KErrNone == err) { |
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445 if (isDataReady()) |
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446 setState(SymbianAudio::ActiveState); |
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447 else |
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448 setState(SymbianAudio::IdleState); |
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449 |
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450 m_notifyTimer->start(m_notifyInterval); |
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451 m_underflow = false; |
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452 |
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453 Q_ASSERT(m_devSound->SamplesPlayed() == 0); |
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454 |
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455 writePaddingData(); |
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456 |
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457 if (m_pullMode && m_source->bytesAvailable() && !m_bytesPadding) |
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458 dataReady(); |
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459 } else { |
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460 setError(QAudio::OpenError); |
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461 close(); |
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462 } |
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463 } |
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464 |
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465 void SymbianAudioOutput::startDevSoundL() |
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466 { |
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467 TMMFCapabilities nativeFormat = m_devSound->Config(); |
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468 m_nativeFormat.iBufferSize = nativeFormat.iBufferSize; |
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469 m_devSound->SetConfigL(m_nativeFormat); |
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470 m_devSound->PlayInitL(); |
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471 } |
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472 |
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473 void SymbianAudioOutput::writePaddingData() |
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474 { |
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475 // See comments in suspend() |
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476 |
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477 while (m_devSoundBuffer && m_bytesPadding) { |
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478 if (SymbianAudio::IdleState == m_internalState) |
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479 setState(SymbianAudio::ActiveState); |
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480 |
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481 TDes8 &outputBuffer = m_devSoundBuffer->Data(); |
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482 const qint64 outputBytes = bytesFree(); |
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483 const qint64 paddingBytes = outputBytes < m_bytesPadding ? |
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484 outputBytes : m_bytesPadding; |
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485 unsigned char *ptr = const_cast<unsigned char*>(outputBuffer.Ptr()); |
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486 Mem::FillZ(ptr, paddingBytes); |
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487 outputBuffer.SetLength(outputBuffer.Length() + paddingBytes); |
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488 m_bytesPadding -= paddingBytes; |
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489 |
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490 if (m_pullMode && m_source->atEnd()) |
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491 lastBufferFilled(); |
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492 if (paddingBytes == outputBytes) |
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493 bufferFilled(); |
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494 } |
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495 } |
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496 |
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497 qint64 SymbianAudioOutput::pushData(const char *data, qint64 len) |
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498 { |
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499 // Data has been written to SymbianAudioOutputPrivate |
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500 |
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501 Q_ASSERT_X(!m_pullMode, Q_FUNC_INFO, |
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502 "pushData called when in pull mode"); |
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503 |
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504 const unsigned char *const inputPtr = |
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505 reinterpret_cast<const unsigned char*>(data); |
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506 qint64 bytesWritten = 0; |
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507 |
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508 if (SymbianAudio::IdleState == m_internalState) |
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509 setState(SymbianAudio::ActiveState); |
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510 |
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511 while (m_devSoundBuffer && (bytesWritten < len)) { |
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512 // writePaddingData() is called from BufferToBeFilled(), so we should |
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513 // never have any padding data left at this point. |
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514 Q_ASSERT_X(0 == m_bytesPadding, Q_FUNC_INFO, |
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515 "Padding bytes remaining in pushData"); |
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516 |
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517 TDes8 &outputBuffer = m_devSoundBuffer->Data(); |
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518 |
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519 const qint64 outputBytes = bytesFree(); |
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520 const qint64 inputBytes = len - bytesWritten; |
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521 const qint64 copyBytes = outputBytes < inputBytes ? |
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522 outputBytes : inputBytes; |
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523 |
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524 outputBuffer.Append(inputPtr + bytesWritten, copyBytes); |
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525 bytesWritten += copyBytes; |
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526 |
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527 bufferFilled(); |
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528 } |
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529 |
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530 m_pushDataReady = (bytesWritten < len); |
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531 |
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532 // If DevSound is still initializing (m_internalState == InitializingState), |
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533 // we cannot transition m_internalState to ActiveState, but we must emit |
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534 // an (external) state change from IdleState to ActiveState. The following |
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535 // call triggers this signal. |
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536 setState(m_internalState); |
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537 |
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538 return bytesWritten; |
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539 } |
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540 |
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541 void SymbianAudioOutput::pullData() |
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542 { |
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543 Q_ASSERT_X(m_pullMode, Q_FUNC_INFO, |
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544 "pullData called when in push mode"); |
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545 |
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546 if (m_bytesPadding) |
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547 m_bytesPadding = 1; |
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548 |
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549 // writePaddingData() is called by BufferToBeFilled() before pullData(), |
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550 // so we should never have any padding data left at this point. |
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551 Q_ASSERT_X(0 == m_bytesPadding, Q_FUNC_INFO, |
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552 "Padding bytes remaining in pullData"); |
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553 |
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554 qint64 inputBytes = m_source->bytesAvailable(); |
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555 while (m_devSoundBuffer && inputBytes) { |
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556 if (SymbianAudio::IdleState == m_internalState) |
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557 setState(SymbianAudio::ActiveState); |
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558 |
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559 TDes8 &outputBuffer = m_devSoundBuffer->Data(); |
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560 |
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561 const qint64 outputBytes = bytesFree(); |
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562 const qint64 copyBytes = outputBytes < inputBytes ? |
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563 outputBytes : inputBytes; |
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564 |
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565 char *outputPtr = (char*)(outputBuffer.Ptr() + outputBuffer.Length()); |
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566 const qint64 bytesCopied = m_source->read(outputPtr, copyBytes); |
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567 Q_ASSERT(bytesCopied == copyBytes); |
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568 outputBuffer.SetLength(outputBuffer.Length() + bytesCopied); |
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569 inputBytes -= bytesCopied; |
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570 |
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571 if (m_source->atEnd()) |
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572 lastBufferFilled(); |
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573 else if (copyBytes == outputBytes) |
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574 bufferFilled(); |
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575 } |
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576 } |
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577 |
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578 void SymbianAudioOutput::bufferFilled() |
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579 { |
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580 Q_ASSERT_X(m_devSoundBuffer, Q_FUNC_INFO, "No buffer to return"); |
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581 |
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582 const TDes8 &outputBuffer = m_devSoundBuffer->Data(); |
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583 m_bytesWritten += outputBuffer.Length(); |
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584 |
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585 m_devSoundBuffer = 0; |
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586 |
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587 m_samplesPlayed = getSamplesPlayed(); |
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588 m_underflowTimer->start(); |
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589 |
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590 if (QAudio::UnderrunError == m_error) |
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591 m_error = QAudio::NoError; |
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592 |
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593 m_devSound->PlayData(); |
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594 } |
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595 |
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596 void SymbianAudioOutput::lastBufferFilled() |
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597 { |
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598 Q_ASSERT_X(m_devSoundBuffer, Q_FUNC_INFO, "No buffer to fill"); |
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599 Q_ASSERT_X(!m_lastBuffer, Q_FUNC_INFO, "Last buffer already sent"); |
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600 m_lastBuffer = true; |
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601 m_devSoundBuffer->SetLastBuffer(ETrue); |
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602 bufferFilled(); |
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603 } |
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604 |
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605 void SymbianAudioOutput::close() |
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606 { |
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607 m_notifyTimer->stop(); |
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608 m_underflowTimer->stop(); |
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609 |
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610 m_error = QAudio::NoError; |
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611 |
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612 if (m_devSound) |
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613 m_devSound->Stop(); |
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614 m_devSound.reset(); |
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615 m_devSoundBuffer = 0; |
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616 m_devSoundBufferSize = 0; |
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617 |
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618 if (!m_pullMode) // m_source is owned |
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619 delete m_source; |
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620 m_pullMode = false; |
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621 m_source = 0; |
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622 |
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623 m_bytesWritten = 0; |
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624 m_pushDataReady = false; |
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625 m_bytesPadding = 0; |
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626 m_underflow = false; |
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627 m_lastBuffer = false; |
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628 m_samplesPlayed = 0; |
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629 m_totalSamplesPlayed = 0; |
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630 |
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631 setState(SymbianAudio::ClosedState); |
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632 } |
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633 |
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634 qint64 SymbianAudioOutput::getSamplesPlayed() const |
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635 { |
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636 qint64 result = 0; |
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637 if (m_devSound) { |
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638 const qint64 samplesWritten = SymbianAudio::Utils::bytesToSamples( |
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639 m_format, m_bytesWritten); |
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640 |
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641 if (m_underflow) { |
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642 result = samplesWritten; |
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643 } else { |
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644 // This is necessary because some DevSound implementations report |
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645 // that they have played more data than has actually been provided to them |
|
646 // by the client. |
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647 const qint64 devSoundSamplesPlayed(m_devSound->SamplesPlayed()); |
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648 result = qMin(devSoundSamplesPlayed, samplesWritten); |
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649 } |
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650 } |
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651 return result; |
|
652 } |
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653 |
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654 void SymbianAudioOutput::setError(QAudio::Error error) |
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655 { |
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656 m_error = error; |
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657 |
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658 // Although no state transition actually occurs here, a stateChanged event |
|
659 // must be emitted to inform the client that the call to start() was |
|
660 // unsuccessful. |
|
661 if (QAudio::OpenError == error) |
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662 emit stateChanged(QAudio::StoppedState); |
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663 |
|
664 if (QAudio::UnderrunError == error) |
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665 setState(SymbianAudio::IdleState); |
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666 else |
|
667 // Close the DevSound instance. This causes a transition to |
|
668 // StoppedState. This must be done asynchronously in case the |
|
669 // current function was called from a DevSound event handler, in which |
|
670 // case deleting the DevSound instance may cause an exception. |
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671 QMetaObject::invokeMethod(this, "close", Qt::QueuedConnection); |
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672 } |
|
673 |
|
674 void SymbianAudioOutput::setState(SymbianAudio::State newInternalState) |
|
675 { |
|
676 const QAudio::State oldExternalState = m_externalState; |
|
677 m_internalState = newInternalState; |
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678 m_externalState = SymbianAudio::Utils::stateNativeToQt( |
|
679 m_internalState, initializingState()); |
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680 |
|
681 if (m_externalState != oldExternalState) |
|
682 emit stateChanged(m_externalState); |
|
683 } |
|
684 |
|
685 bool SymbianAudioOutput::isDataReady() const |
|
686 { |
|
687 return (m_source && m_source->bytesAvailable()) |
|
688 || m_bytesPadding |
|
689 || m_pushDataReady; |
|
690 } |
|
691 |
|
692 QAudio::State SymbianAudioOutput::initializingState() const |
|
693 { |
|
694 return isDataReady() ? QAudio::ActiveState : QAudio::IdleState; |
|
695 } |
|
696 |
|
697 QT_END_NAMESPACE |
|