Mercurial > hg > svcore
view data/fileio/ResamplingWavFileReader.cpp @ 510:af7b6e55895b
* Ensure text models are exported with text properties in RDF, and
imported back into text models again (instead of time/value models)
author | Chris Cannam |
---|---|
date | Mon, 08 Dec 2008 11:53:10 +0000 |
parents | 3012af787e4a |
children | b4a8d8221eaf |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2007 QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "ResamplingWavFileReader.h" #include "WavFileReader.h" #include "base/Profiler.h" #include "base/ProgressReporter.h" #include <QFileInfo> ResamplingWavFileReader::ResamplingWavFileReader(FileSource source, ResampleMode resampleMode, CacheMode mode, size_t targetRate, ProgressReporter *reporter) : CodedAudioFileReader(mode, targetRate), m_source(source), m_path(source.getLocalFilename()), m_cancelled(false), m_processed(0), m_completion(0), m_original(0), m_reporter(reporter), m_decodeThread(0) { m_channelCount = 0; m_fileRate = 0; std::cerr << "ResamplingWavFileReader::ResamplingWavFileReader(\"" << m_path.toStdString() << "\"): rate " << targetRate << std::endl; Profiler profiler("ResamplingWavFileReader::ResamplingWavFileReader", true); m_original = new WavFileReader(m_path); if (!m_original->isOK()) { m_error = m_original->getError(); return; } m_channelCount = m_original->getChannelCount(); m_fileRate = m_original->getSampleRate(); initialiseDecodeCache(); if (resampleMode == ResampleAtOnce) { if (m_reporter) { connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled())); m_reporter->setMessage (tr("Resampling %1...").arg(QFileInfo(m_path).fileName())); } size_t blockSize = 16384; size_t total = m_original->getFrameCount(); SampleBlock block; for (size_t i = 0; i < total; i += blockSize) { size_t count = blockSize; if (i + count > total) count = total - i; m_original->getInterleavedFrames(i, count, block); addBlock(block); if (m_cancelled) break; } if (isDecodeCacheInitialised()) finishDecodeCache(); endSerialised(); if (m_reporter) m_reporter->setProgress(100); delete m_original; m_original = 0; } else { if (m_reporter) m_reporter->setProgress(100); m_decodeThread = new DecodeThread(this); m_decodeThread->start(); } } ResamplingWavFileReader::~ResamplingWavFileReader() { if (m_decodeThread) { m_cancelled = true; m_decodeThread->wait(); delete m_decodeThread; } delete m_original; } void ResamplingWavFileReader::cancelled() { m_cancelled = true; } void ResamplingWavFileReader::DecodeThread::run() { if (m_reader->m_cacheMode == CacheInTemporaryFile) { m_reader->startSerialised("ResamplingWavFileReader::Decode"); } size_t blockSize = 16384; size_t total = m_reader->m_original->getFrameCount(); SampleBlock block; for (size_t i = 0; i < total; i += blockSize) { size_t count = blockSize; if (i + count > total) count = total - i; m_reader->m_original->getInterleavedFrames(i, count, block); m_reader->addBlock(block); if (m_reader->m_cancelled) break; } if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache(); m_reader->m_completion = 100; m_reader->endSerialised(); delete m_reader->m_original; m_reader->m_original = 0; } void ResamplingWavFileReader::addBlock(const SampleBlock &frames) { addSamplesToDecodeCache(frames); m_processed += frames.size(); float ratio = float(m_sampleRate) / float(m_fileRate); int progress = lrint((float(m_processed) * ratio * 100) / float(m_original->getFrameCount())); if (progress > 99) progress = 99; m_completion = progress; if (m_reporter) { m_reporter->setProgress(progress); } } void ResamplingWavFileReader::getSupportedExtensions(std::set<QString> &extensions) { WavFileReader::getSupportedExtensions(extensions); } bool ResamplingWavFileReader::supportsExtension(QString extension) { return WavFileReader::supportsExtension(extension); } bool ResamplingWavFileReader::supportsContentType(QString type) { return WavFileReader::supportsContentType(type); } bool ResamplingWavFileReader::supports(FileSource &source) { return WavFileReader::supports(source); }