more WIP audio facade

10 files changed, 199 insertions, 16 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index cc71435..232d330 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -15,13 +15,22 @@ project(crepe C CXX)
 add_library(crepe SHARED)
 
 target_include_directories(crepe
-	SYSTEM INTERFACE .
+	PUBLIC SYSTEM INTERFACE .
 )
 
-# NOTE: all libraries *must* be linked as PRIVATE
+# TODO: libraries should be linked as PRIVATE
 target_link_libraries(crepe
-	PRIVATE soloud
+	PUBLIC soloud
 )
 
 add_subdirectory(crepe)
 
+install(
+	TARGETS crepe
+	FILE_SET HEADERS DESTINATION include/crepe
+)
+
+
+add_executable(dummy_audio dummy_audio.cpp)
+target_link_libraries(dummy_audio PUBLIC crepe)
+
diff --git a/src/crepe/CMakeLists.txt b/src/crepe/CMakeLists.txt
index aa64262..13d9be5 100644
--- a/src/crepe/CMakeLists.txt
+++ b/src/crepe/CMakeLists.txt
@@ -1,5 +1,11 @@
 target_sources(crepe PUBLIC
 	Sound.cpp
+	SoundSystem.cpp
+)
+
+target_sources(crepe PUBLIC FILE_SET HEADERS FILES
+	Sound.h
+	SoundSystem.h
 )
 
 add_subdirectory(api)
diff --git a/src/crepe/Sound.cpp b/src/crepe/Sound.cpp
index f45a697..d48393c 100644
--- a/src/crepe/Sound.cpp
+++ b/src/crepe/Sound.cpp
@@ -1,9 +1,24 @@
 #include "Sound.h"
+#include "SoundSystem.h"
 
 using namespace crepe;
 
-Sound::Sound(std::unique_ptr<api::Resource> res) {
-	_res = std::move(res);
+Sound::Sound(std::unique_ptr<api::Resource> res, SoundSystem & system) : system(system) {
+	this->res = std::move(res);
 }
 
+void Sound::play() {
+	if (this->system.engine.getPause(this->handle)) {
+		// resume if paused
+		this->system.engine.setPause(this->handle, false);
+	} else {
+		// or start new sound
+		this->handle = this->system.engine.play(this->sample);
+	}
+}
+
+void Sound::pause() {
+	if (this->system.engine.getPause(this->handle)) return;
+	this->system.engine.setPause(this->handle, true);
+}
 
diff --git a/src/crepe/Sound.h b/src/crepe/Sound.h
index ac4b7f4..71fe390 100644
--- a/src/crepe/Sound.h
+++ b/src/crepe/Sound.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <soloud.h>
+#include <soloud_wav.h>
 
 #include <memory>
 
@@ -8,22 +9,61 @@
 
 namespace crepe {
 
-class Sound {
-public:
-	Sound(std::unique_ptr<api::Resource> res);
-	virtual ~Sound() = default;
+class SoundSystem;
 
+class Sound {
 public:
+	/**
+	 * \brief Pause this sample
+	 *
+	 * Pauses this sound if it is playing, or does nothing if it is already
+	 * paused. The playhead position is saved, such that calling \c play() after
+	 * this function makes the sound resume.
+	 */
 	void pause();
+	/**
+	 * \brief Play this sample
+	 *
+	 * Resume playback if this sound is paused, or start from the beginning of
+	 * the sample.
+	 *
+	 * \note This class only saves a reference to the most recent 'voice' of this
+	 * sound. Calling \c play() while the sound is already playing causes
+	 * multiple instances of the sample to play simultaniously. The sample
+	 * started last is the one that is controlled afterwards.
+	 */
 	void play();
+	/**
+	 * \brief Reset playhead position
+	 * 
+	 * Resets the playhead position so that calling \c play() after this function
+	 * makes it play from the start of the sample. If the sound is not paused
+	 * before calling this function, this function will stop playback.
+	 */
 	void rewind();
+	/**
+	 * \brief Set playback volume / gain
+	 *
+	 * \param volume  Volume (0 = muted, 1 = full volume)
+	 */
 	void set_volume(float volume);
+	/**
+	 * \brief Set looping behavior for this sample
+	 *
+	 * \param looping  Looping behavior (false = one-shot, true = loop)
+	 */
 	void set_looping(bool looping);
 
 private:
-	std::unique_ptr<api::Resource> _res;
-	SoLoud::handle _handle;
-	bool _paused;
+	Sound(std::unique_ptr<api::Resource> res, SoundSystem & system);
+	SoundSystem & system;
+	friend class SoundSystem;
+
+private:
+	std::unique_ptr<api::Resource> res;
+	SoLoud::Wav sample;
+	SoLoud::handle handle;
+	bool paused;
 };
 
 }
diff --git a/src/crepe/SoundSystem.cpp b/src/crepe/SoundSystem.cpp
new file mode 100644
index 0000000..30b0157
--- /dev/null
+++ b/src/crepe/SoundSystem.cpp
@@ -0,0 +1,25 @@
+#include "SoundSystem.h"
+#include <memory>
+
+using namespace crepe;
+
+SoundSystem SoundSystem::instance { };
+
+std::unique_ptr<Sound> SoundSystem::sound(const std::string & src) {
+	auto res = std::make_unique<api::Resource>(src);
+	return SoundSystem::sound(std::move(res));
+}
+
+std::unique_ptr<Sound> SoundSystem::sound(std::unique_ptr<api::Resource> res) {
+	Sound * out = new Sound(std::move(res), SoundSystem::instance);
+	return std::unique_ptr<Sound>(out);
+}
+
+SoundSystem::SoundSystem() {
+	engine.init();
+}
+
+SoundSystem::~SoundSystem() {
+	engine.deinit();
+}
+
diff --git a/src/crepe/SoundSystem.h b/src/crepe/SoundSystem.h
new file mode 100644
index 0000000..23bb00a
--- /dev/null
+++ b/src/crepe/SoundSystem.h
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <soloud.h>
+
+#include <memory>
+
+#include "Sound.h"
+
+namespace crepe {
+
+class SoundSystem {
+public:
+	static std::unique_ptr<Sound> sound(const std::string & res);
+	static std::unique_ptr<Sound> sound(std::unique_ptr<api::Resource> res);
+
+private:
+	SoundSystem();
+	virtual ~SoundSystem();
+	static SoundSystem instance;
+
+private:
+	SoLoud::Soloud engine;
+	friend class Sound;
+};
+
+}
+
diff --git a/src/crepe/api/CMakeLists.txt b/src/crepe/api/CMakeLists.txt
index 94617a4..feb03ef 100644
--- a/src/crepe/api/CMakeLists.txt
+++ b/src/crepe/api/CMakeLists.txt
@@ -1,4 +1,11 @@
 target_sources(crepe PUBLIC
-	AudioSource.cpp
+	# AudioSource.cpp
+	Resource.cpp
+)
+
+target_sources(crepe PUBLIC FILE_SET HEADERS FILES
+	AudioSource.h
+	Component.h
+	Resource.h
 )
 
diff --git a/src/crepe/api/Resource.cpp b/src/crepe/api/Resource.cpp
new file mode 100644
index 0000000..a38900b
--- /dev/null
+++ b/src/crepe/api/Resource.cpp
@@ -0,0 +1,12 @@
+#include "Resource.h"
+
+using namespace crepe::api;
+
+Resource::Resource(const std::string & src) : src(src) {
+	this->file = std::ifstream(src, std::ios::in | std::ios::binary);
+}
+
+const std::istream & Resource::read() {
+	return this->file;
+}
+
diff --git a/src/crepe/api/Resource.h b/src/crepe/api/Resource.h
index 620a10e..2260b1a 100644
--- a/src/crepe/api/Resource.h
+++ b/src/crepe/api/Resource.h
@@ -1,16 +1,21 @@
 #pragma once
 
 #include <string>
+#include <fstream>
+#include <iostream>
 
 namespace crepe::api {
 
 class Resource {
 public:
-	Resource(const std::string & source);
-	virtual ~Resource();
+	Resource(const std::string & src);
+
+public:
+	const std::istream & read();
 
 private:
-	std::string _source;
+	std::string src;
+	std::ifstream file;
 };
 
 }
diff --git a/src/dummy_audio.cpp b/src/dummy_audio.cpp
new file mode 100644
index 0000000..5e0000e
--- /dev/null
+++ b/src/dummy_audio.cpp
@@ -0,0 +1,37 @@
+#include "crepe/SoundSystem.h"
+
+#include <chrono>
+#include <thread>
+
+using namespace crepe;
+using namespace std;
+using namespace std::chrono_literals;
+
+int main() {
+	auto bgm = SoundSystem::sound("../mwe/audio/bgm.ogg");
+	auto sfx1 = SoundSystem::sound("../mwe/audio/sfx1.wav");
+	auto sfx2 = SoundSystem::sound("../mwe/audio/sfx2.wav");
+	auto sfx3 = SoundSystem::sound("../mwe/audio/sfx3.wav");
+
+	bgm->play();
+
+	// play each sample sequentially
+	this_thread::sleep_for(500ms);
+	sfx1->play();
+	this_thread::sleep_for(500ms);
+	sfx2->play();
+	bgm->pause();
+	this_thread::sleep_for(500ms);
+	sfx3->play();
+	bgm->play();
+	this_thread::sleep_for(500ms);
+
+	// play all samples simultaniously
+	sfx1->play();
+	sfx2->play();
+	sfx3->play();
+	this_thread::sleep_for(1000ms);
+
+	return 0;
+}
+