diff data/fileio/WavFileWriter.cpp @ 148:1a42221a1522

* Reorganising code base.  This revision will not compile.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/fileio/WavFileWriter.cpp	Mon Jul 31 11:49:58 2006 +0000
@@ -0,0 +1,120 @@
+/* -*- 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.
+    
+    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 <sndfile.h>
+
+#include <iostream>
+
+WavFileWriter::WavFileWriter(QString path,
+			     size_t sampleRate,
+			     DenseTimeValueModel *source,
+			     MultiSelection *selection) :
+    m_path(path),
+    m_sampleRate(sampleRate),
+    m_model(source),
+    m_selection(selection)
+{
+}
+
+WavFileWriter::~WavFileWriter()
+{
+}
+
+bool
+WavFileWriter::isOK() const
+{
+    return (m_error.isEmpty());
+}
+
+QString
+WavFileWriter::getError() const
+{
+    return m_error;
+}
+
+void
+WavFileWriter::write()
+{
+    int channels = m_model->getChannelCount();
+
+    SF_INFO fileInfo;
+    fileInfo.samplerate = m_sampleRate;
+    fileInfo.channels = channels;
+    fileInfo.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
+    
+    SNDFILE *file = sf_open(m_path.toLocal8Bit(), SFM_WRITE, &fileInfo);
+    if (!file) {
+	std::cerr << "WavFileWriter::write: Failed to open file ("
+		  << sf_strerror(file) << ")" << std::endl;
+	m_error = QString("Failed to open audio file '%1' for writing")
+	    .arg(m_path);
+	return;
+    }
+
+    MultiSelection *selection = m_selection;
+
+    if (!m_selection) {
+	selection = new MultiSelection;
+	selection->setSelection(Selection(m_model->getStartFrame(),
+					  m_model->getEndFrame()));
+    }
+
+    size_t bs = 2048;
+    float *ub = new float[bs]; // uninterleaved buffer (one channel)
+    float *ib = new float[bs * 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 < channels; ++c) {
+		m_model->getValues(c, f, f + n, ub);
+		for (size_t i = 0; i < n; ++i) {
+		    ib[i * channels + c] = ub[i];
+		}
+	    }	    
+
+	    sf_count_t written = sf_writef_float(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;
+	    }
+	}
+    }
+
+    sf_close(file);
+
+    delete[] ub;
+    delete[] ib;
+    if (!m_selection) delete selection;
+}
+
+
+	    
+