Mercurial > hg > svcore
view data/fileio/WavFileReader.cpp @ 1028:abe13fe10ed6
RealTime frame-conversion test
author | Chris Cannam |
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date | Wed, 14 Jan 2015 14:58:38 +0000 |
parents | 59e7fe1b1003 |
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 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_buffer(0), m_bufsiz(0), 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); delete[] m_buffer; } void WavFileReader::updateFrameCount() { QMutexLocker locker(&m_mutex); int 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; } void WavFileReader::getInterleavedFrames(int start, int count, SampleBlock &results) const { if (count == 0) return; results.clear(); results.reserve(count * m_fileInfo.channels); QMutexLocker locker(&m_mutex); if (!m_file || !m_channelCount) { return; } if ((long)start >= m_fileInfo.frames) { // SVDEBUG << "WavFileReader::getInterleavedFrames: " << start // << " > " << m_fileInfo.frames << endl; return; } if (long(start + count) > m_fileInfo.frames) { count = m_fileInfo.frames - start; } sf_count_t readCount = 0; if (start != m_lastStart || count != m_lastCount) { if (sf_seek(m_file, start, SEEK_SET) < 0) { // cerr << "sf_seek failed" << endl; return; } if (count * m_fileInfo.channels > m_bufsiz) { // cerr << "WavFileReader: Reallocating buffer for " << count // << " frames, " << m_fileInfo.channels << " channels: " // << m_bufsiz << " floats" << endl; m_bufsiz = count * m_fileInfo.channels; delete[] m_buffer; m_buffer = new float[m_bufsiz]; } if ((readCount = sf_readf_float(m_file, m_buffer, count)) < 0) { // cerr << "sf_readf_float failed" << endl; return; } m_lastStart = start; m_lastCount = readCount; } for (int i = 0; i < count * m_fileInfo.channels; ++i) { if (i >= m_bufsiz) { cerr << "INTERNAL ERROR: WavFileReader::getInterleavedFrames: " << i << " >= " << m_bufsiz << endl; } results.push_back(m_buffer[i]); } return; } 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())); }