From 0e2db9214ff3d6cbe4388224f405bc5d67d6a8d3 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 6 Oct 2018 11:13:03 +0200
Subject: Add (automatic) samplerate detection to the project.

---
 src/filelist.cc          | 38 ++++++++++++++++++++++++++++++++++++++
 src/project.cc           | 18 ++++++++++++++++++
 src/project.h            |  6 +++++-
 src/projectrenderer.cc   |  1 +
 src/projectserialiser.cc |  2 ++
 5 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/src/filelist.cc b/src/filelist.cc
index da7f399..9c6f591 100644
--- a/src/filelist.cc
+++ b/src/filelist.cc
@@ -47,6 +47,8 @@
 #include <QPainter>
 #include <QHeaderView>
 
+#include <sndfile.h>
+
 class ChannelMapDeligate
 	: public QStyledItemDelegate
 {
@@ -423,6 +425,18 @@ FileList::FileList(Instrument& instrument)
 	createMenus();
 }
 
+static double getSamplerate(const QString& file)
+{
+	SF_INFO sf_info;
+	SNDFILE *fh = sf_open(file.toStdString().c_str(), SFM_READ, &sf_info);
+	if(!fh)
+	{
+		return -1.0;
+	}
+
+	return sf_info.samplerate;
+}
+
 void FileList::addFiles()
 {
 	auto root = instrument.getProject().getRawFileRoot();
@@ -441,6 +455,30 @@ void FileList::addFiles()
 		QFileInfo fi(file);
 		QString name = fi.baseName();
 		path = fi.absolutePath();
+
+		double samplerate = getSamplerate(file);
+		if(samplerate == -1.0)
+		{
+			// Error reading file. Skip it.
+			std::cout << "Error reading file. Skip it.\n";
+			++i;
+			continue;
+		}
+
+		if(instrument.getProject().getProjectSamplerate() == -1.0)
+		{
+			// Samplerate not yet set
+			instrument.getProject().setProjectSamplerate(samplerate);
+		}
+
+		if(instrument.getProject().getProjectSamplerate() != samplerate)
+		{
+			// Samplerate of file differs from the projeft samplerate
+			std::cout << "Samplerate of file differs from the project samplerate:\n";
+			std::cout << " project: " << instrument.getProject().getProjectSamplerate() << std::endl;
+			std::cout << " file: " << samplerate << std::endl;
+		}
+
 		if(root == file.left(root.length()))
 		{
 			file = file.mid(root.length() + 1);
diff --git a/src/project.cc b/src/project.cc
index 5cadcd4..e592439 100644
--- a/src/project.cc
+++ b/src/project.cc
@@ -501,6 +501,24 @@ void Project::setProjectDescription(const QString& description)
 	}
 }
 
+double Project::getProjectSamplerate() const
+{
+	return samplerate;
+}
+
+void Project::setProjectSamplerate(double samplerate)
+{
+	if(this->samplerate == samplerate)
+	{
+		return;
+	}
+
+	{
+		Project::RAIIBulkUpdate bulkUpdate(*this);
+		this->samplerate = samplerate;
+	}
+}
+
 Instrument& Project::getInstrument(int id)
 {
 	for(auto& instrument : instruments)
diff --git a/src/project.h b/src/project.h
index b3456f6..3e2b886 100644
--- a/src/project.h
+++ b/src/project.h
@@ -202,7 +202,10 @@ public:
 	void setExportPath(const QString& prefix);
 
 	QString getProjectDescription() const;
-	void setProjectDescription(const QString& prefix);
+	void setProjectDescription(const QString& description);
+
+	double getProjectSamplerate() const;
+	void setProjectSamplerate(double samplerate);
 
 	Instrument& getInstrument(int id);
 	int createInstrument();
@@ -228,6 +231,7 @@ private:
 	QString raw_file_root;
 	QString export_path;
 	QString description;
+	double samplerate{-1.0};
 
 	std::list<Instrument> instruments;
 	std::list<Channel> channels;
diff --git a/src/projectrenderer.cc b/src/projectrenderer.cc
index d266fef..4d87b73 100644
--- a/src/projectrenderer.cc
+++ b/src/projectrenderer.cc
@@ -55,6 +55,7 @@ void ProjectRenderer::render()
 	drumkit.setAttribute("version", "1.0");
 	drumkit.setAttribute("name", project.getProjectName());
 	drumkit.setAttribute("description", project.getProjectDescription());
+	drumkit.setAttribute("smaplerate", project.getProjectSamplerate());
 	doc.appendChild(drumkit);
 
 	QDomElement channels = doc.createElement("channels");
diff --git a/src/projectserialiser.cc b/src/projectserialiser.cc
index 8985daa..64824dd 100644
--- a/src/projectserialiser.cc
+++ b/src/projectserialiser.cc
@@ -137,6 +137,7 @@ QString ProjectSerialiser::serialise(const Project& project)
 	dgedit.appendChild(export_path);
 
 	dgedit.setAttribute("next_id", project.next_id);
+	dgedit.setAttribute("samplerate", project.samplerate);
 
 	auto channels = doc.createElement("channels");
 	dgedit.appendChild(channels);
@@ -237,6 +238,7 @@ bool ProjectSerialiser::deserialise(const QString& data, Project& project)
 	}
 
 	project.next_id = dom["next_id"].toInt();
+	project.samplerate = dom["samplerate"].toDouble();
 	project.project_name = dom("project_name").text();
 	project.raw_file_root = dom("raw_file_root").text();
 	project.description = dom("description").text();
-- 
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