Mercurial > hg > svcore
view data/fileio/WavFileReader.cpp @ 670:9e29bf7ce1ff
* Permit user CFLAGS, if given, to override our CXXFLAGS if no user CXXFLAGS is given
author | Chris Cannam |
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date | Tue, 08 Mar 2011 10:21:21 +0000 |
parents | ecef2f1bec18 |
children | bd527db65d20 |
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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_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)) { std::cerr << "WavFileReader::initialize: Failed to open file (" << sf_strerror(m_file) << ")" << std::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; } // std::cerr << "WavFileReader: Frame count " << m_frameCount << ", channel count " << m_channelCount << ", sample rate " << m_sampleRate << std::endl; } WavFileReader::~WavFileReader() { if (m_file) sf_close(m_file); delete[] m_buffer; } void WavFileReader::updateFrameCount() { QMutexLocker locker(&m_mutex); size_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) { std::cerr << "WavFileReader::updateFrameCount: Failed to open file (" << sf_strerror(m_file) << ")" << std::endl; } } // std::cerr << "WavFileReader::updateFrameCount: now " << m_fileInfo.frames << std::endl; m_frameCount = m_fileInfo.frames; if (m_channelCount == 0) { m_channelCount = m_fileInfo.channels; m_sampleRate = m_fileInfo.samplerate; } if (m_frameCount != prevCount) { // std::cerr << "frameCountChanged" << std::endl; emit frameCountChanged(); } } void WavFileReader::updateDone() { updateFrameCount(); m_updating = false; } void WavFileReader::getInterleavedFrames(size_t start, size_t 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) { // std::cerr << "WavFileReader::getInterleavedFrames: " << start // << " > " << m_fileInfo.frames << std::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) { // std::cerr << "sf_seek failed" << std::endl; return; } if (count * m_fileInfo.channels > m_bufsiz) { // std::cerr << "WavFileReader: Reallocating buffer for " << count // << " frames, " << m_fileInfo.channels << " channels: " // << m_bufsiz << " floats" << std::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) { // std::cerr << "sf_readf_float failed" << std::endl; return; } m_lastStart = start; m_lastCount = readCount; } for (size_t i = 0; i < count * m_fileInfo.channels; ++i) { if (i >= m_bufsiz) { std::cerr << "INTERNAL ERROR: WavFileReader::getInterleavedFrames: " << i << " >= " << m_bufsiz << std::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))) { extensions.insert(QString(info.extension).toLower()); } } } 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())); }