diff data/fileio/WavFileWriter.cpp @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/fileio/WavFileWriter.cpp	Fri May 11 09:08:14 2007 +0000
@@ -0,0 +1,167 @@
+/* -*- 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 "system/System.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::const_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 = 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;
+}
+