Mercurial > hg > svcore
view data/fileio/WavFileWriter.cpp @ 264:260032c26c4f
* don't store fft values scaled by fftsize/2; that's a special requirement
for the spectrogram, and other applications will not expect it -- make the
spectrogram do that scaling itself
* add a higher-resolution memory cache (still polar, though) as an alternative
to the 16-bit compact cache
* don't use the memory cache if we want rectangular coords (unless the disc
cache is totally infeasible) as conversion slows it down anyway
* avoid redundant rectangular -> polar -> rectangular conversion when storing
values in a rectangular-mode disc cache
author | Chris Cannam |
---|---|
date | Fri, 01 Jun 2007 13:56:35 +0000 |
parents | 91fdc752e540 |
children | 5877d68815c7 |
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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 "WavFileWriter.h" #include "model/DenseTimeValueModel.h" #include "base/Selection.h" #include <QFileInfo> #include <iostream> WavFileWriter::WavFileWriter(QString path, size_t sampleRate, size_t channels) : m_path(path), m_sampleRate(sampleRate), m_channels(channels), m_file(0) { SF_INFO fileInfo; fileInfo.samplerate = m_sampleRate; fileInfo.channels = m_channels; fileInfo.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT; m_file = sf_open(m_path.toLocal8Bit(), SFM_WRITE, &fileInfo); if (!m_file) { std::cerr << "WavFileWriter: Failed to open file (" << sf_strerror(m_file) << ")" << std::endl; m_error = QString("Failed to open audio file '%1' for writing") .arg(m_path); } } WavFileWriter::~WavFileWriter() { if (m_file) close(); } bool WavFileWriter::isOK() const { return (m_error.isEmpty()); } QString WavFileWriter::getError() const { return m_error; } bool WavFileWriter::writeModel(DenseTimeValueModel *source, MultiSelection *selection) { if (source->getChannelCount() != m_channels) { std::cerr << "WavFileWriter::writeModel: Wrong number of channels (" << source->getChannelCount() << " != " << m_channels << ")" << std::endl; m_error = QString("Failed to write model to audio file '%1'") .arg(m_path); return false; } if (!m_file) { m_error = QString("Failed to write model to audio file '%1': File not open") .arg(m_path); return false; } bool ownSelection = false; if (!selection) { selection = new MultiSelection; selection->setSelection(Selection(source->getStartFrame(), source->getEndFrame())); ownSelection = true; } size_t bs = 2048; float *ub = new float[bs]; // uninterleaved buffer (one channel) float *ib = new float[bs * m_channels]; // interleaved buffer for (MultiSelection::SelectionList::iterator i = selection->getSelections().begin(); i != selection->getSelections().end(); ++i) { size_t f0(i->getStartFrame()), f1(i->getEndFrame()); for (size_t f = f0; f < f1; f += bs) { size_t n = std::min(bs, f1 - f); for (int c = 0; c < int(m_channels); ++c) { source->getValues(c, f, f + n, ub); for (size_t i = 0; i < n; ++i) { ib[i * m_channels + c] = ub[i]; } } sf_count_t written = sf_writef_float(m_file, ib, n); if (written < n) { m_error = QString("Only wrote %1 of %2 frames at file frame %3") .arg(written).arg(n).arg(f); break; } } } delete[] ub; delete[] ib; if (ownSelection) delete selection; return isOK(); } bool WavFileWriter::writeSamples(float **samples, size_t count) { if (!m_file) { m_error = QString("Failed to write model to audio file '%1': File not open") .arg(m_path); return false; } float *b = new float[count * m_channels]; for (size_t i = 0; i < count; ++i) { for (size_t c = 0; c < m_channels; ++c) { b[i * m_channels + c] = samples[c][i]; } } sf_count_t written = sf_writef_float(m_file, b, count); delete[] b; if (written < count) { m_error = QString("Only wrote %1 of %2 frames") .arg(written).arg(count); } return isOK(); } bool WavFileWriter::close() { if (m_file) { sf_close(m_file); m_file = 0; } return true; }