From cb69759ccec14f2403024f8702665e16efcb8001 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Sat, 8 Oct 2022 19:14:12 +0300
Subject: [PATCH] Update audio example

---
 examples/audio.cpp | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/examples/audio.cpp b/examples/audio.cpp
index 057f57f8..1de90e36 100644
--- a/examples/audio.cpp
+++ b/examples/audio.cpp
@@ -9,6 +9,8 @@
 #include <psemek/audio/effect/fade_out.hpp>
 #include <psemek/audio/effect/compressor.hpp>
 #include <psemek/audio/effect/pause.hpp>
+#include <psemek/audio/effect/loop.hpp>
+#include <psemek/audio/effect/pitch.hpp>
 #include <psemek/audio/duplicate.hpp>
 #include <psemek/audio/stereo.hpp>
 #include <psemek/audio/mixer.hpp>
@@ -20,6 +22,7 @@
 #include <psemek/geom/constants.hpp>
 #include <psemek/geom/camera.hpp>
 #include <psemek/prof/profiler.hpp>
+#include <psemek/io/file_stream.hpp>
 
 #include <map>
 
@@ -69,8 +72,10 @@ struct audio_app
 		: app::app("Audio example")
 	{
 		mixer_ = audio::make_mixer();
+
 		volume_control_ = audio::volume_stereo(mixer_, 0.5f, 0.5f, 0.1f);
-		auto compressor = audio::compressor(volume_control_, audio::from_db(-2.f), 0.95f, 0.002f, 1.f, audio::from_db(1.f));
+		pitch_control_ = audio::pitch(volume_control_, 1.f, 0.1f);
+		auto compressor = audio::compressor(pitch_control_, audio::from_db(-2.f), 0.95f, 0.002f, 1.f, audio::from_db(1.f));
 		pause_control_ = audio::pause(compressor, false, 0.01f);
 		engine_.output()->stream(pause_control_);
 	}
@@ -90,6 +95,12 @@ struct audio_app
 		{
 			pause_control_->paused(!pause_control_->paused());
 		}
+
+		if (key == SDLK_KP_PLUS)
+			pitch_control_->pitch(std::pow(2.f, 1.f / 12.f));
+
+		if (key == SDLK_KP_MINUS)
+			pitch_control_->pitch(std::pow(2.f, - 1.f / 12.f));
 	}
 
 	void on_key_up(SDL_Keycode key) override
@@ -103,6 +114,12 @@ struct audio_app
 				ch->stream(audio::fade_out(s, 0.01f));
 			channels_.erase(key);
 		}
+
+		if (key == SDLK_KP_PLUS)
+			pitch_control_->pitch(1.f);
+
+		if (key == SDLK_KP_MINUS)
+			pitch_control_->pitch(1.f);
 	}
 
 	void update() override
@@ -139,6 +156,7 @@ private:
 	audio::engine engine_;
 	audio::mixer_ptr mixer_;
 	std::shared_ptr<audio::volume_control_stereo> volume_control_;
+	std::shared_ptr<audio::pitch_control> pitch_control_;
 	std::shared_ptr<audio::pause_control> pause_control_;
 	std::map<SDL_Keycode, audio::channel_ptr> channels_;