Mercurial > hg > svcore
view data/fileio/ResamplingWavFileReader.cpp @ 335:02d2ad95ea52 spectrogram-cache-rejig
* Get storage advice for each cache in an FFT data server. Allows us to be
more confident about the actual memory situation and cut over from memory
to disc part way through an FFT calculation if necessary. StorageAdviser
is now a bit too optimistic though (it's too keen to allocate large numbers
of small blocks in memory).
author | Chris Cannam |
---|---|
date | Tue, 13 Nov 2007 13:54:10 +0000 |
parents | 1d656dcda8ef |
children | 183ee2a55fc7 |
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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 <QProgressDialog> #include <QFileInfo> #include <QApplication> ResamplingWavFileReader::ResamplingWavFileReader(FileSource source, ResampleMode resampleMode, CacheMode mode, size_t targetRate) : CodedAudioFileReader(mode, targetRate), m_source(source), m_path(source.getLocalFilename()), m_cancelled(false), m_processed(0), m_completion(0), m_original(0), m_progress(0), 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 (dynamic_cast<QApplication *>(QCoreApplication::instance())) { m_progress = new QProgressDialog (QObject::tr("Resampling %1...").arg(QFileInfo(m_path).fileName()), QObject::tr("Stop"), 0, 100); m_progress->hide(); } 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(); delete m_original; m_original = 0; delete m_progress; m_progress = 0; } else { 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::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(); int progress = lrint((float(m_processed) * 100) / float(m_original->getFrameCount())); if (progress > 99) progress = 99; m_completion = progress; if (m_progress) { if (progress > m_progress->value()) { m_progress->setValue(progress); m_progress->show(); m_progress->raise(); qApp->processEvents(); if (m_progress->wasCanceled()) { m_cancelled = true; } } } } 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); }