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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 using namespace std;
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25
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26 DecodingWavFileReader::DecodingWavFileReader(FileSource source,
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27 DecodeMode decodeMode,
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28 CacheMode mode,
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29 sv_samplerate_t targetRate,
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30 bool normalised,
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31 ProgressReporter *reporter) :
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32 CodedAudioFileReader(mode, targetRate, normalised),
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33 m_source(source),
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34 m_path(source.getLocalFilename()),
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35 m_cancelled(false),
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36 m_processed(0),
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37 m_completion(0),
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38 m_original(0),
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39 m_reporter(reporter),
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40 m_decodeThread(0)
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41 {
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42 m_channelCount = 0;
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43 m_fileRate = 0;
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44
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45 SVDEBUG << "DecodingWavFileReader::DecodingWavFileReader(\""
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46 << m_path << "\"): rate " << targetRate << endl;
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47
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48 Profiler profiler("DecodingWavFileReader::DecodingWavFileReader", true);
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49
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50 m_original = new WavFileReader(m_path);
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51 if (!m_original->isOK()) {
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52 m_error = m_original->getError();
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53 return;
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54 }
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55
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56 m_channelCount = m_original->getChannelCount();
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57 m_fileRate = m_original->getSampleRate();
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58
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59 initialiseDecodeCache();
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60
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61 if (decodeMode == DecodeAtOnce) {
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62
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63 if (m_reporter) {
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64 connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled()));
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65 m_reporter->setMessage
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66 (tr("Decoding %1...").arg(QFileInfo(m_path).fileName()));
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67 }
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68
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69 sv_frame_t blockSize = 16384;
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70 sv_frame_t total = m_original->getFrameCount();
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71
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72 vector<float> block;
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73
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74 for (sv_frame_t i = 0; i < total; i += blockSize) {
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75
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76 sv_frame_t count = blockSize;
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77 if (i + count > total) count = total - i;
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78
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79 block = m_original->getInterleavedFrames(i, count);
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80 addBlock(block);
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81
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82 if (m_cancelled) break;
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83 }
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84
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85 if (isDecodeCacheInitialised()) finishDecodeCache();
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86 endSerialised();
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87
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88 if (m_reporter) m_reporter->setProgress(100);
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89
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90 delete m_original;
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91 m_original = 0;
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92
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93 } else {
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94
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95 if (m_reporter) m_reporter->setProgress(100);
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96
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97 m_decodeThread = new DecodeThread(this);
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98 m_decodeThread->start();
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99 }
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100 }
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101
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102 DecodingWavFileReader::~DecodingWavFileReader()
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103 {
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104 if (m_decodeThread) {
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105 m_cancelled = true;
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106 m_decodeThread->wait();
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107 delete m_decodeThread;
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108 }
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109
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110 delete m_original;
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111 }
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112
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113 void
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114 DecodingWavFileReader::cancelled()
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115 {
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116 m_cancelled = true;
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117 }
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118
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119 void
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120 DecodingWavFileReader::DecodeThread::run()
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121 {
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122 if (m_reader->m_cacheMode == CacheInTemporaryFile) {
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123 m_reader->startSerialised("DecodingWavFileReader::Decode");
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124 }
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125
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126 sv_frame_t blockSize = 16384;
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127 sv_frame_t total = m_reader->m_original->getFrameCount();
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128
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129 vector<float> block;
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130
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131 for (sv_frame_t i = 0; i < total; i += blockSize) {
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132
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133 sv_frame_t count = blockSize;
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134 if (i + count > total) count = total - i;
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135
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136 block = m_reader->m_original->getInterleavedFrames(i, count);
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137 m_reader->addBlock(block);
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138
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139 if (m_reader->m_cancelled) break;
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140 }
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141
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142 if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache();
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143 m_reader->m_completion = 100;
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144
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145 m_reader->endSerialised();
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146
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147 delete m_reader->m_original;
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148 m_reader->m_original = 0;
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149 }
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150
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151 void
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152 DecodingWavFileReader::addBlock(const vector<float> &frames)
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153 {
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154 addSamplesToDecodeCache(frames);
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155
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156 m_processed += frames.size();
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157
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158 double ratio = double(m_sampleRate) / double(m_fileRate);
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159
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160 int progress = int(lrint((double(m_processed) * ratio * 100) /
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161 double(m_original->getFrameCount())));
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162
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163 if (progress > 99) progress = 99;
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164 m_completion = progress;
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165
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166 if (m_reporter) {
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167 m_reporter->setProgress(progress);
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168 }
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169 }
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170
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171 void
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172 DecodingWavFileReader::getSupportedExtensions(set<QString> &extensions)
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173 {
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174 WavFileReader::getSupportedExtensions(extensions);
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175 }
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176
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177 bool
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178 DecodingWavFileReader::supportsExtension(QString extension)
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179 {
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180 return WavFileReader::supportsExtension(extension);
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181 }
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182
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183 bool
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184 DecodingWavFileReader::supportsContentType(QString type)
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185 {
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186 return WavFileReader::supportsContentType(type);
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187 }
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188
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189 bool
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190 DecodingWavFileReader::supports(FileSource &source)
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191 {
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192 return WavFileReader::supports(source);
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193 }
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194
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195
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