From 9a0abf4a45c516b15d74ab41f8dab8348d6b00c9 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Wed, 15 Jun 2016 07:53:25 +0200
Subject: Make sure we abide the samplerate in all input/output engines.

---
 drumgizmo/input/midifile.cc |  7 ++++++-
 drumgizmo/input/midifile.h  |  1 +
 drumgizmo/input/test.cc     | 21 +++++++++++++--------
 drumgizmo/input/test.h      |  2 ++
 src/audioinputengine.h      |  3 +++
 src/drumgizmo.cc            |  4 ++++
 6 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/drumgizmo/input/midifile.cc b/drumgizmo/input/midifile.cc
index 27a8e04..6a24a00 100644
--- a/drumgizmo/input/midifile.cc
+++ b/drumgizmo/input/midifile.cc
@@ -40,7 +40,7 @@ MidifileInputEngine::MidifileInputEngine()
 	, track{-1} // all tracks
 	, loop{false}
 	, offset{0.0}
-	, samplerate{44100.0} // todo: via ctor arg
+	, samplerate{44100.0}
 {
 }
 
@@ -190,3 +190,8 @@ void MidifileInputEngine::run(size_t pos, size_t len, std::vector<event_t>& even
 void MidifileInputEngine::post()
 {
 }
+
+void MidifileInputEngine::setSampleRate(double sample_rate)
+{
+	this->samplerate = sample_rate;
+}
diff --git a/drumgizmo/input/midifile.h b/drumgizmo/input/midifile.h
index a0e8fa6..518d8d2 100644
--- a/drumgizmo/input/midifile.h
+++ b/drumgizmo/input/midifile.h
@@ -49,6 +49,7 @@ public:
 	void pre() override;
 	void run(size_t pos, size_t len, std::vector<event_t>& events) override;
 	void post() override;
+	void setSampleRate(double sample_rate) override;
 
 private:
 	smf_t* smf;
diff --git a/drumgizmo/input/test.cc b/drumgizmo/input/test.cc
index 4789119..6767769 100644
--- a/drumgizmo/input/test.cc
+++ b/drumgizmo/input/test.cc
@@ -35,6 +35,7 @@ TestInputEngine::TestInputEngine()
 	, probability{0.1}
 	, instrument{-1}
 	, length{-1}
+	, sample_rate{44100.0}
 {
 }
 
@@ -44,14 +45,14 @@ TestInputEngine::~TestInputEngine()
 
 bool TestInputEngine::init(const Instruments& instruments)
 {
-  return true;
+	return true;
 }
 
 void TestInputEngine::setParm(const std::string& parm, const std::string& value)
 {
 	if(parm == "p")
 	{
-  		probability = atof(value.c_str());
+		probability = atof(value.c_str());
 	}
 	if(parm == "instr")
 	{
@@ -65,7 +66,7 @@ void TestInputEngine::setParm(const std::string& parm, const std::string& value)
 
 bool TestInputEngine::start()
 {
-  return true;
+	return true;
 }
 
 void TestInputEngine::stop()
@@ -78,7 +79,7 @@ void TestInputEngine::pre()
 
 void TestInputEngine::run(size_t pos, size_t len, std::vector<event_t>& events)
 {
-	if((float)rand() / (float)RAND_MAX > probability) 
+	if((float)rand() / (float)RAND_MAX > probability)
 	{
 		return;
 	}
@@ -87,17 +88,16 @@ void TestInputEngine::run(size_t pos, size_t len, std::vector<event_t>& events)
 	auto& event = events.back();
 	event.type = TYPE_ONSET;
 
-	if(length != -1 && (int)pos > length * 44100) 
+	if((length != -1) && (pos > std::llround(length * sample_rate)))
 	{
 		event.type = TYPE_STOP;
 	}
-	else 
+	else
 	{
 		event.type = TYPE_ONSET;
 	}
 
-
-	if(instrument != -1) 
+	if(instrument != -1)
 	{
 		event.instrument = instrument;
 	}
@@ -113,3 +113,8 @@ void TestInputEngine::run(size_t pos, size_t len, std::vector<event_t>& events)
 void TestInputEngine::post()
 {
 }
+
+void TestInputEngine::setSampleRate(double sample_rate)
+{
+	this->sample_rate = sample_rate;
+}
diff --git a/drumgizmo/input/test.h b/drumgizmo/input/test.h
index 1edf386..70936ea 100644
--- a/drumgizmo/input/test.h
+++ b/drumgizmo/input/test.h
@@ -45,9 +45,11 @@ public:
 	void pre() override;
 	void run(size_t pos, size_t len, std::vector<event_t>& events) override;
 	void post() override;
+	void setSampleRate(double sample_rate) override;
 
 private:
 	float probability;
 	int instrument;
 	int length;
+	double sample_rate;
 };
diff --git a/src/audioinputengine.h b/src/audioinputengine.h
index bb7131c..72fa57d 100644
--- a/src/audioinputengine.h
+++ b/src/audioinputengine.h
@@ -48,4 +48,7 @@ public:
 	virtual void pre() = 0;
 	virtual void run(size_t pos, size_t len, std::vector<event_t>& events) = 0;
 	virtual void post() = 0;
+
+	//! Reimplement to receive sample rate changes.
+	virtual void setSampleRate(double sample_rate) {}
 };
diff --git a/src/drumgizmo.cc b/src/drumgizmo.cc
index e07b7a1..d6dc028 100644
--- a/src/drumgizmo.cc
+++ b/src/drumgizmo.cc
@@ -426,6 +426,10 @@ void DrumGizmo::setSamplerate(int samplerate)
 {
 	DEBUG(dgeditor, "%s samplerate: %d\n", __PRETTY_FUNCTION__, samplerate);
 	settings.samplerate.store(samplerate);
+
+	// Notify input engine of the samplerate change.
+	ie.setSampleRate(samplerate);
+
 #ifdef WITH_RESAMPLER
 	resamplers.setup(kit.getSamplerate(), settings.samplerate.load());
 
-- 
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