Attempt to do fade outs and fade ins when seeking source sound, but not working yet. Readme changes.

Source/PS_Source/Input/AInputS.h

@@ -167,6 +167,37 @@ public:
 			if (inchans == 1 && numchans > 0)
 			{
 				float sig = getCrossFadedSampleLambda(m_currentsample, 0, subsect_t0, subsect_t1, xfadelen);
+				if (m_seekfade.state == 1)
+				{
+					//Logger::writeToLog("Seek requested to pos " + String(m_seekfade.requestedpos));
+					m_seekfade.state = 2;
+				}
+				if (m_seekfade.state == 2)
+				{
+					float seekfadegain = 1.0-(1.0 / m_seekfade.length*m_seekfade.counter);
+					sig *= seekfadegain;
+					++m_seekfade.counter;
+					if (m_seekfade.counter >= m_seekfade.length)
+					{
+						//Logger::writeToLog("Doing seek " + String(m_seekfade.requestedpos));
+						m_seekfade.counter = 0;
+						m_seekfade.state = 3;
+						seekImpl(m_seekfade.requestedpos);
+					}
+				}
+				if (m_seekfade.state == 3)
+				{
+					float seekfadegain = 1.0 / m_seekfade.length*m_seekfade.counter;
+					sig *= seekfadegain;
+					++m_seekfade.counter;
+					if (m_seekfade.counter >= m_seekfade.length)
+					{
+						//Logger::writeToLog("Seek cycle finished");
+						m_seekfade.counter = 0;
+						m_seekfade.state = 0;
+						m_seekfade.requestedpos = 0.0;
+					}
+				}
 				for (int j = 0; j < numchans; ++j)
 				{
 					smps[j][i] = sig;
@@ -204,7 +235,7 @@ public:
 		
 		return nsmps;
 	}
-	void seek(double pos) override //0=start,1.0=end
+	void seekImpl(double pos)
 	{
 		if (m_using_memory_buffer == true)
 		{
@@ -230,6 +261,19 @@ public:
 		m_cached_file_range = Range<int64_t>();
 		updateXFadeCache();
 		//m_cached_crossfade_range = Range<int64_t>();
+	}
+	void seek(double pos) override //0=start,1.0=end
+    {
+		std::lock_guard<std::mutex> locker(m_mutex);
+		if (m_seekfade.state == 0)
+		{
+			m_seekfade.state = 1;
+			m_seekfade.counter = 0;
+		}
+		m_seekfade.length = 16384;
+		m_seekfade.requestedpos = pos;
+		
+		
 	}
 	std::pair<Range<double>,Range<double>> getCachedRangesNormalized()
 	{
@@ -312,4 +356,11 @@ private:
 	bool m_using_memory_buffer = true;
 	AudioFormatManager* m_manager = nullptr;
     std::mutex m_mutex;
+	struct
+	{
+		int state = 0; // 0 inactive, 1 seek requested, 2 fade out, 3 fade in
+		int counter = 0;
+		int length = 44100;
+		double requestedpos = 0.0;
+	} m_seekfade;
 };

Source/PS_Source/StretchSource.cpp

@@ -605,6 +605,7 @@ void StretchAudioSource::seekPercent(double pos)
 {
 	ScopedLock locker(m_cs);
 	m_seekpos = pos;
+	//m_resampler->Reset();
 	m_inputfile->seek(pos);
 	++m_param_change_count;
 }

readme.txt

@@ -12,7 +12,7 @@ History :
 	-Show approximate stretched output duration in info label (only valid if the stretch amount is not automated in the host)
 	-Added stretch processing bypass parameter (to play the original sound looped like it is passed into the stretcher)
 	-Waveform selection can be moved by dragging with shift pressed
-	-Waveform should no longer disappear when not intended
+	-Fixes for the waveform graphics disappearing unexpectedly (this probably still isn't entirely fixed, though)
 02-16-2018 1.0.1
 	-Increased maximum number of input channels to 8
 	-Added zoom/scroll bar for waveform