Chris@148: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@148: 
Chris@148: /*
Chris@148:     Sonic Visualiser
Chris@148:     An audio file viewer and annotation editor.
Chris@148:     Centre for Digital Music, Queen Mary, University of London.
Chris@148:     This file copyright 2006 Chris Cannam.
Chris@148:     
Chris@148:     This program is free software; you can redistribute it and/or
Chris@148:     modify it under the terms of the GNU General Public License as
Chris@148:     published by the Free Software Foundation; either version 2 of the
Chris@148:     License, or (at your option) any later version.  See the file
Chris@148:     COPYING included with this distribution for more information.
Chris@148: */
Chris@148: 
Chris@148: #include "WavFileReader.h"
Chris@148: 
Chris@148: #include <iostream>
Chris@148: 
Chris@175: #include <QMutexLocker>
Chris@175: 
Chris@176: WavFileReader::WavFileReader(QString path, bool fileUpdating) :
Chris@148:     m_file(0),
Chris@148:     m_path(path),
Chris@148:     m_buffer(0),
Chris@148:     m_bufsiz(0),
Chris@148:     m_lastStart(0),
Chris@176:     m_lastCount(0),
Chris@176:     m_updating(fileUpdating)
Chris@148: {
Chris@148:     m_frameCount = 0;
Chris@148:     m_channelCount = 0;
Chris@148:     m_sampleRate = 0;
Chris@148: 
Chris@148:     m_fileInfo.format = 0;
Chris@148:     m_fileInfo.frames = 0;
Chris@148:     m_file = sf_open(m_path.toLocal8Bit(), SFM_READ, &m_fileInfo);
Chris@148: 
Chris@175:     if (!m_file || m_fileInfo.channels <= 0) {
Chris@148: 	std::cerr << "WavFileReader::initialize: Failed to open file ("
Chris@148: 		  << sf_strerror(m_file) << ")" << std::endl;
Chris@148: 
Chris@148: 	if (m_file) {
Chris@148: 	    m_error = QString("Couldn't load audio file '%1':\n%2")
Chris@148: 		.arg(m_path).arg(sf_strerror(m_file));
Chris@148: 	} else {
Chris@148: 	    m_error = QString("Failed to open audio file '%1'")
Chris@148: 		.arg(m_path);
Chris@148: 	}
Chris@148: 	return;
Chris@148:     }
Chris@148: 
Chris@148:     m_frameCount = m_fileInfo.frames;
Chris@148:     m_channelCount = m_fileInfo.channels;
Chris@148:     m_sampleRate = m_fileInfo.samplerate;
Chris@175: 
Chris@175:     std::cerr << "WavFileReader: Frame count " << m_frameCount << ", channel count " << m_channelCount << ", sample rate " << m_sampleRate << std::endl;
Chris@175: 
Chris@148: }
Chris@148: 
Chris@148: WavFileReader::~WavFileReader()
Chris@148: {
Chris@148:     if (m_file) sf_close(m_file);
Chris@148: }
Chris@148: 
Chris@148: void
Chris@175: WavFileReader::updateFrameCount()
Chris@175: {
Chris@175:     QMutexLocker locker(&m_mutex);
Chris@175: 
Chris@175:     size_t prevCount = m_fileInfo.frames;
Chris@175: 
Chris@175:     if (m_file) {
Chris@175:         sf_close(m_file);
Chris@175:         m_file = sf_open(m_path.toLocal8Bit(), SFM_READ, &m_fileInfo);
Chris@175:         if (!m_file || m_fileInfo.channels <= 0) {
Chris@175:             std::cerr << "WavFileReader::updateFrameCount: Failed to open file ("
Chris@175:                       << sf_strerror(m_file) << ")" << std::endl;
Chris@175:         }
Chris@175:     }
Chris@175: 
Chris@175:     std::cerr << "WavFileReader::updateFrameCount: now " << m_fileInfo.frames << std::endl;
Chris@175: 
Chris@176:     m_frameCount = m_fileInfo.frames;
Chris@176: 
Chris@176:     if (m_frameCount != prevCount) emit frameCountChanged();
Chris@176: }
Chris@176: 
Chris@176: void
Chris@176: WavFileReader::updateDone()
Chris@176: {
Chris@176:     updateFrameCount();
Chris@176:     m_updating = false;
Chris@175: }
Chris@175: 
Chris@175: void
Chris@148: WavFileReader::getInterleavedFrames(size_t start, size_t count,
Chris@148: 				    SampleBlock &results) const
Chris@148: {
Chris@175:     if (count == 0) return;
Chris@148:     results.clear();
Chris@175: 
Chris@175:     QMutexLocker locker(&m_mutex);
Chris@175: 
Chris@175:     if (!m_file || !m_channelCount) {
Chris@175:         return;
Chris@175:     }
Chris@148: 
Chris@148:     if ((long)start >= m_fileInfo.frames) {
Chris@175: //        std::cerr << "WavFileReader::getInterleavedFrames: " << start
Chris@175: //                  << " > " << m_fileInfo.frames << std::endl;
Chris@148: 	return;
Chris@148:     }
Chris@148: 
Chris@148:     if (long(start + count) > m_fileInfo.frames) {
Chris@148: 	count = m_fileInfo.frames - start;
Chris@148:     }
Chris@148: 
Chris@148:     sf_count_t readCount = 0;
Chris@148: 
Chris@148:     if (start != m_lastStart || count != m_lastCount) {
Chris@148: 
Chris@148: 	if (sf_seek(m_file, start, SEEK_SET) < 0) {
Chris@175: //            std::cerr << "sf_seek failed" << std::endl;
Chris@148: 	    return;
Chris@148: 	}
Chris@148: 	
Chris@148: 	if (count * m_fileInfo.channels > m_bufsiz) {
Chris@148: //	    std::cerr << "WavFileReader: Reallocating buffer for " << count
Chris@148: //		      << " frames, " << m_fileInfo.channels << " channels: "
Chris@148: //		      << m_bufsiz << " floats" << std::endl;
Chris@148: 	    m_bufsiz = count * m_fileInfo.channels;
Chris@148: 	    delete[] m_buffer;
Chris@148: 	    m_buffer = new float[m_bufsiz];
Chris@148: 	}
Chris@148: 	
Chris@148: 	if ((readCount = sf_readf_float(m_file, m_buffer, count)) < 0) {
Chris@175: //            std::cerr << "sf_readf_float failed" << std::endl;
Chris@148: 	    return;
Chris@148: 	}
Chris@148: 
Chris@148: 	m_lastStart = start;
Chris@148: 	m_lastCount = readCount;
Chris@148:     }
Chris@148: 
Chris@148:     for (size_t i = 0; i < count * m_fileInfo.channels; ++i) {
Chris@148: 	results.push_back(m_buffer[i]);
Chris@148:     }
Chris@148: 
Chris@148:     return;
Chris@148: }
Chris@148: 
Chris@157: void
Chris@157: WavFileReader::getSupportedExtensions(std::set<QString> &extensions)
Chris@157: {
Chris@157:     int count;
Chris@157: 
Chris@157:     if (sf_command(0, SFC_GET_FORMAT_MAJOR_COUNT, &count, sizeof(count))) {
Chris@157:         extensions.insert("wav");
Chris@157:         extensions.insert("aiff");
Chris@157:         extensions.insert("aif");
Chris@157:         return;
Chris@157:     }
Chris@157: 
Chris@157:     SF_FORMAT_INFO info;
Chris@157:     for (int i = 0; i < count; ++i) {
Chris@157:         info.format = i;
Chris@157:         if (!sf_command(0, SFC_GET_FORMAT_MAJOR, &info, sizeof(info))) {
Chris@157:             extensions.insert(info.extension);
Chris@157:         }
Chris@157:     }
Chris@157: }