From 855fe70255e55ac1d760151cad6fb9dbcca7d733 Mon Sep 17 00:00:00 2001
From: "sigonasr2, Sig, Sigo" <sigonasr2@gmail.com>
Date: Thu, 25 Aug 2022 16:05:18 -0500
Subject: [PATCH 1/2] Update olc_swe_template.h

Include compile instructions for emscripten.
---
 source/olc_swe_template.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/source/olc_swe_template.h b/source/olc_swe_template.h
index 18255cd..5d426a1 100644
--- a/source/olc_swe_template.h
+++ b/source/olc_swe_template.h
@@ -118,6 +118,19 @@
 	
 */
 
+/*
+
+	Compiling with Emscripten
+	~~~~~~~~~~~~~~~~~~~~~~~~~
+	When compiling with Emscripten, you will include SDL mixer in your setting flags:
+	Add: -s USE_SDL_MIXER=2 
+	
+	Your command should look something like:
+
+	em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_SDL_MIXER=2 -s USE_LIBPNG=1 ./YourSource.cpp -o pge.html
+
+*/
+
 /*
 	Using in multiple-file projects
 	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

From 0343865caa5a4ce06dea07b0393ed3de77ac37b2 Mon Sep 17 00:00:00 2001
From: sigonasr2 <sigonasr2@gmail.com>
Date: Mon, 17 Apr 2023 21:53:12 -0500
Subject: [PATCH 2/2] Add in functionality for PauseWaveform, ResumeWaveform,
 and RewindWaveform

---
 source/olc_swe_template.h  | 13 -------------
 source/swe_wave_engine.cpp | 22 ++++++++++++++++++++--
 source/swe_wave_engine.h   |  4 ++++
 3 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/source/olc_swe_template.h b/source/olc_swe_template.h
index 5d426a1..18255cd 100644
--- a/source/olc_swe_template.h
+++ b/source/olc_swe_template.h
@@ -118,19 +118,6 @@
 	
 */
 
-/*
-
-	Compiling with Emscripten
-	~~~~~~~~~~~~~~~~~~~~~~~~~
-	When compiling with Emscripten, you will include SDL mixer in your setting flags:
-	Add: -s USE_SDL_MIXER=2 
-	
-	Your command should look something like:
-
-	em++ -std=c++17 -O2 -s ALLOW_MEMORY_GROWTH=1 -s MAX_WEBGL_VERSION=2 -s MIN_WEBGL_VERSION=2 -s USE_SDL_MIXER=2 -s USE_LIBPNG=1 ./YourSource.cpp -o pge.html
-
-*/
-
 /*
 	Using in multiple-file projects
 	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diff --git a/source/swe_wave_engine.cpp b/source/swe_wave_engine.cpp
index 27498e6..23e8efc 100644
--- a/source/swe_wave_engine.cpp
+++ b/source/swe_wave_engine.cpp
@@ -112,6 +112,18 @@ namespace olc::sound
 		return std::prev(m_listWaves.end());
 	}
 
+	void WaveEngine::PauseWaveform(const PlayingWave& w) {
+		w->bPaused = true;
+	}
+
+	void WaveEngine::ResumeWaveform(const PlayingWave& w) {
+		w->bPaused = false;
+	}
+
+	void WaveEngine::RewindWaveform(const PlayingWave& w) {
+		w->dInstanceTime = m_dGlobalTime;
+	}
+
 	void WaveEngine::StopWaveform(const PlayingWave& w)
 	{
 		w->bFlagForStop = true;
@@ -173,8 +185,14 @@ namespace olc::sound
 						}
 						else
 						{
-							// OR, sample the waveform from the correct channel
-							fSample += float(wave.pWave->vChannelView[nChannel % wave.pWave->file.channels()].GetSample(dTimeOffset * m_dSamplePerTime * wave.dSpeedModifier));
+							// OR, if waveform is not paused, then sample the waveform from the correct channel
+							if (!wave.bPaused) {
+								fSample += float(wave.pWave->vChannelView[nChannel % wave.pWave->file.channels()].GetSample(dTimeOffset * m_dSamplePerTime * wave.dSpeedModifier));
+							}
+							else {
+								// Account for paused waiting time.
+								wave.dInstanceTime += m_dTimePerSample;
+							}
 						}
 					}
 				}
diff --git a/source/swe_wave_engine.h b/source/swe_wave_engine.h
index 05a39d5..6d3117b 100644
--- a/source/swe_wave_engine.h
+++ b/source/swe_wave_engine.h
@@ -21,6 +21,7 @@ namespace olc::sound
 		bool bFinished = false;
 		bool bLoop = false;
 		bool bFlagForStop = false;
+		bool bPaused = false;
 	};
 
 	typedef std::list<WaveInstance>::iterator PlayingWave;
@@ -69,6 +70,9 @@ namespace olc::sound
 
 
 		PlayingWave PlayWaveform(Wave* pWave, bool bLoop = false, double dSpeed = 1.0);
+		void PauseWaveform(const PlayingWave& w);
+		void ResumeWaveform(const PlayingWave& w);
+		void RewindWaveform(const PlayingWave& w);
 		void StopWaveform(const PlayingWave& w);
 		void StopAll();