Mercurial > hg > svcore
view data/fileio/WavFileReader.cpp @ 1064:c9fdd9921146 tonioni
Implement FillGaps option in SparseModel export
author | Chris Cannam |
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date | Tue, 31 Mar 2015 11:54:57 +0100 |
parents | 48e4ffa9fb48 |
children | 4d9816ba0ebe 1517d4c60e88 |
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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 2006 Chris Cannam and 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 "WavFileReader.h" #include <iostream> #include <QMutexLocker> #include <QFileInfo> WavFileReader::WavFileReader(FileSource source, bool fileUpdating) : m_file(0), m_source(source), m_path(source.getLocalFilename()), m_seekable(false), m_lastStart(0), m_lastCount(0), m_updating(fileUpdating) { m_frameCount = 0; m_channelCount = 0; m_sampleRate = 0; m_fileInfo.format = 0; m_fileInfo.frames = 0; m_file = sf_open(m_path.toLocal8Bit(), SFM_READ, &m_fileInfo); if (!m_file || (!fileUpdating && m_fileInfo.channels <= 0)) { cerr << "WavFileReader::initialize: Failed to open file at \"" << m_path << "\" (" << sf_strerror(m_file) << ")" << endl; if (m_file) { m_error = QString("Couldn't load audio file '%1':\n%2") .arg(m_path).arg(sf_strerror(m_file)); } else { m_error = QString("Failed to open audio file '%1'") .arg(m_path); } return; } if (m_fileInfo.channels > 0) { m_frameCount = m_fileInfo.frames; m_channelCount = m_fileInfo.channels; m_sampleRate = m_fileInfo.samplerate; m_seekable = (m_fileInfo.seekable != 0); // Our m_seekable reports whether a file is rapidly seekable, // so things like Ogg don't qualify. We cautiously report // every file type of "at least" the historical period of Ogg // or FLAC as non-seekable. int type = m_fileInfo.format & SF_FORMAT_TYPEMASK; // cerr << "WavFileReader: format type is " << type << " (flac, ogg are " << SF_FORMAT_FLAC << ", " << SF_FORMAT_OGG << ")" << endl; if (type >= SF_FORMAT_FLAC || type >= SF_FORMAT_OGG) { // cerr << "WavFileReader: Recording as non-seekable" << endl; m_seekable = false; } } // cerr << "WavFileReader: Frame count " << m_frameCount << ", channel count " << m_channelCount << ", sample rate " << m_sampleRate << ", seekable " << m_seekable << endl; } WavFileReader::~WavFileReader() { if (m_file) sf_close(m_file); } void WavFileReader::updateFrameCount() { QMutexLocker locker(&m_mutex); sv_frame_t prevCount = m_fileInfo.frames; if (m_file) { sf_close(m_file); m_file = sf_open(m_path.toLocal8Bit(), SFM_READ, &m_fileInfo); if (!m_file || m_fileInfo.channels <= 0) { cerr << "WavFileReader::updateFrameCount: Failed to open file at \"" << m_path << "\" (" << sf_strerror(m_file) << ")" << endl; } } // SVDEBUG << "WavFileReader::updateFrameCount: now " << m_fileInfo.frames << endl; m_frameCount = m_fileInfo.frames; if (m_channelCount == 0) { m_channelCount = m_fileInfo.channels; m_sampleRate = m_fileInfo.samplerate; } if (m_frameCount != prevCount) { // cerr << "frameCountChanged" << endl; emit frameCountChanged(); } } void WavFileReader::updateDone() { updateFrameCount(); m_updating = false; } SampleBlock WavFileReader::getInterleavedFrames(sv_frame_t start, sv_frame_t count) const { if (count == 0) return SampleBlock(); QMutexLocker locker(&m_mutex); if (!m_file || !m_channelCount) { return SampleBlock(); } if (start >= m_fileInfo.frames) { // SVDEBUG << "WavFileReader::getInterleavedFrames: " << start // << " > " << m_fileInfo.frames << endl; return SampleBlock(); } if (start + count > m_fileInfo.frames) { count = m_fileInfo.frames - start; } if (start != m_lastStart || count != m_lastCount) { if (sf_seek(m_file, start, SEEK_SET) < 0) { return SampleBlock(); } sv_frame_t n = count * m_fileInfo.channels; m_buffer.resize(n); sf_count_t readCount = 0; if ((readCount = sf_readf_float(m_file, m_buffer.data(), count)) < 0) { return SampleBlock(); } m_buffer.resize(readCount * m_fileInfo.channels); m_lastStart = start; m_lastCount = readCount; } return m_buffer; } void WavFileReader::getSupportedExtensions(std::set<QString> &extensions) { int count; if (sf_command(0, SFC_GET_FORMAT_MAJOR_COUNT, &count, sizeof(count))) { extensions.insert("wav"); extensions.insert("aiff"); extensions.insert("aifc"); extensions.insert("aif"); return; } SF_FORMAT_INFO info; for (int i = 0; i < count; ++i) { info.format = i; if (!sf_command(0, SFC_GET_FORMAT_MAJOR, &info, sizeof(info))) { QString ext = QString(info.extension).toLower(); extensions.insert(ext); if (ext == "oga") { // libsndfile is awfully proper, it says it only // supports .oga but lots of Ogg audio files in the // wild are .ogg and it will accept that extensions.insert("ogg"); } } } } bool WavFileReader::supportsExtension(QString extension) { std::set<QString> extensions; getSupportedExtensions(extensions); return (extensions.find(extension.toLower()) != extensions.end()); } bool WavFileReader::supportsContentType(QString type) { return (type == "audio/x-wav" || type == "audio/x-aiff" || type == "audio/basic"); } bool WavFileReader::supports(FileSource &source) { return (supportsExtension(source.getExtension()) || supportsContentType(source.getContentType())); }