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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Sonic Visualiser
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5 An audio file viewer and annotation editor.
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2007 QMUL.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 #include "DecodingWavFileReader.h"
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17
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18 #include "WavFileReader.h"
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19 #include "base/Profiler.h"
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20 #include "base/ProgressReporter.h"
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21
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22 #include <QFileInfo>
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23
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24 DecodingWavFileReader::DecodingWavFileReader(FileSource source,
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25 ResampleMode resampleMode,
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26 CacheMode mode,
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27 sv_samplerate_t targetRate,
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28 bool normalised,
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29 ProgressReporter *reporter) :
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30 CodedAudioFileReader(mode, targetRate, normalised),
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31 m_source(source),
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32 m_path(source.getLocalFilename()),
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33 m_cancelled(false),
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34 m_processed(0),
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35 m_completion(0),
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36 m_original(0),
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37 m_reporter(reporter),
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38 m_decodeThread(0)
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39 {
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40 m_channelCount = 0;
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41 m_fileRate = 0;
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42
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43 SVDEBUG << "DecodingWavFileReader::DecodingWavFileReader(\""
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44 << m_path << "\"): rate " << targetRate << endl;
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45
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46 Profiler profiler("DecodingWavFileReader::DecodingWavFileReader", true);
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47
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48 m_original = new WavFileReader(m_path);
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49 if (!m_original->isOK()) {
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50 m_error = m_original->getError();
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51 return;
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52 }
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53
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54 m_channelCount = m_original->getChannelCount();
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55 m_fileRate = m_original->getSampleRate();
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56
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57 initialiseDecodeCache();
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58
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59 if (resampleMode == ResampleAtOnce) {
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60
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61 if (m_reporter) {
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62 connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled()));
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63 m_reporter->setMessage
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64 (tr("Decoding %1...").arg(QFileInfo(m_path).fileName()));
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65 }
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66
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67 sv_frame_t blockSize = 16384;
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68 sv_frame_t total = m_original->getFrameCount();
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69
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70 SampleBlock block;
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71
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72 for (sv_frame_t i = 0; i < total; i += blockSize) {
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73
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74 sv_frame_t count = blockSize;
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75 if (i + count > total) count = total - i;
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76
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77 block = m_original->getInterleavedFrames(i, count);
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78 addBlock(block);
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79
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80 if (m_cancelled) break;
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81 }
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82
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83 if (isDecodeCacheInitialised()) finishDecodeCache();
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84 endSerialised();
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85
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86 if (m_reporter) m_reporter->setProgress(100);
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87
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88 delete m_original;
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89 m_original = 0;
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90
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91 } else {
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92
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93 if (m_reporter) m_reporter->setProgress(100);
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94
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95 m_decodeThread = new DecodeThread(this);
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96 m_decodeThread->start();
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97 }
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98 }
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99
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100 DecodingWavFileReader::~DecodingWavFileReader()
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101 {
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102 if (m_decodeThread) {
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103 m_cancelled = true;
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104 m_decodeThread->wait();
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105 delete m_decodeThread;
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106 }
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107
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108 delete m_original;
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109 }
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110
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111 void
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112 DecodingWavFileReader::cancelled()
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113 {
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114 m_cancelled = true;
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115 }
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116
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117 void
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118 DecodingWavFileReader::DecodeThread::run()
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119 {
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120 if (m_reader->m_cacheMode == CacheInTemporaryFile) {
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121 m_reader->startSerialised("DecodingWavFileReader::Decode");
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122 }
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123
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124 sv_frame_t blockSize = 16384;
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125 sv_frame_t total = m_reader->m_original->getFrameCount();
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126
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127 SampleBlock block;
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128
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129 for (sv_frame_t i = 0; i < total; i += blockSize) {
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130
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131 sv_frame_t count = blockSize;
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132 if (i + count > total) count = total - i;
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133
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134 block = m_reader->m_original->getInterleavedFrames(i, count);
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135 m_reader->addBlock(block);
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136
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137 if (m_reader->m_cancelled) break;
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138 }
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139
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140 if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache();
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141 m_reader->m_completion = 100;
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142
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143 m_reader->endSerialised();
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144
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145 delete m_reader->m_original;
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146 m_reader->m_original = 0;
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147 }
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148
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149 void
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150 DecodingWavFileReader::addBlock(const SampleBlock &frames)
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151 {
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152 addSamplesToDecodeCache(frames);
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153
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154 m_processed += frames.size();
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155
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156 double ratio = double(m_sampleRate) / double(m_fileRate);
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157
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158 int progress = int(lrint((double(m_processed) * ratio * 100) /
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159 double(m_original->getFrameCount())));
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160
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161 if (progress > 99) progress = 99;
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162 m_completion = progress;
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163
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164 if (m_reporter) {
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165 m_reporter->setProgress(progress);
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166 }
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167 }
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168
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169 void
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170 DecodingWavFileReader::getSupportedExtensions(std::set<QString> &extensions)
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171 {
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172 WavFileReader::getSupportedExtensions(extensions);
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173 }
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174
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175 bool
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176 DecodingWavFileReader::supportsExtension(QString extension)
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177 {
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178 return WavFileReader::supportsExtension(extension);
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179 }
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180
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181 bool
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182 DecodingWavFileReader::supportsContentType(QString type)
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183 {
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184 return WavFileReader::supportsContentType(type);
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185 }
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186
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187 bool
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188 DecodingWavFileReader::supports(FileSource &source)
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189 {
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190 return WavFileReader::supports(source);
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191 }
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192
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193
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