Mercurial > hg > svcore
view data/fileio/DecodingWavFileReader.cpp @ 1008:d9e0e59a1581
When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)
author | Chris Cannam |
---|---|
date | Fri, 14 Nov 2014 13:51:33 +0000 |
parents | d03b3d956358 |
children | cc27f35aa75c |
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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 "DecodingWavFileReader.h" #include "WavFileReader.h" #include "base/Profiler.h" #include "base/ProgressReporter.h" #include <QFileInfo> DecodingWavFileReader::DecodingWavFileReader(FileSource source, ResampleMode resampleMode, CacheMode mode, int targetRate, bool normalised, ProgressReporter *reporter) : CodedAudioFileReader(mode, targetRate, normalised), 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; SVDEBUG << "DecodingWavFileReader::DecodingWavFileReader(\"" << m_path << "\"): rate " << targetRate << endl; Profiler profiler("DecodingWavFileReader::DecodingWavFileReader", 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("Decoding %1...").arg(QFileInfo(m_path).fileName())); } int blockSize = 16384; int total = m_original->getFrameCount(); SampleBlock block; for (int i = 0; i < total; i += blockSize) { int 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(); } } DecodingWavFileReader::~DecodingWavFileReader() { if (m_decodeThread) { m_cancelled = true; m_decodeThread->wait(); delete m_decodeThread; } delete m_original; } void DecodingWavFileReader::cancelled() { m_cancelled = true; } void DecodingWavFileReader::DecodeThread::run() { if (m_reader->m_cacheMode == CacheInTemporaryFile) { m_reader->startSerialised("DecodingWavFileReader::Decode"); } int blockSize = 16384; int total = m_reader->m_original->getFrameCount(); SampleBlock block; for (int i = 0; i < total; i += blockSize) { int 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 DecodingWavFileReader::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 DecodingWavFileReader::getSupportedExtensions(std::set<QString> &extensions) { WavFileReader::getSupportedExtensions(extensions); } bool DecodingWavFileReader::supportsExtension(QString extension) { return WavFileReader::supportsExtension(extension); } bool DecodingWavFileReader::supportsContentType(QString type) { return WavFileReader::supportsContentType(type); } bool DecodingWavFileReader::supports(FileSource &source) { return WavFileReader::supports(source); }