al streaming fix

src/audio/AL/ALAudio.cpp

@@ -200,7 +200,6 @@ void ALSpeaker::stop() {
     if (source) {
         AL_CHECK(alSourceStop(source));
         al->freeSource(source);
-        source = 0;
     }
 }
 

src/audio/audio.cpp

@@ -351,8 +351,8 @@ Channel* audio::get_channel(int index) {
     return channels.at(index).get();
 }
 
-float audio::get_master_volume() {
-    return channels.at(0)->getVolume();
+size_t audio::count_speakers() {
+    return speakers.size();
 }
 
 void audio::update(double delta) {
@@ -362,7 +362,7 @@ void audio::update(double delta) {
         entry.second->update(delta);
     }
 
-    float masterVolume = get_master_volume();
+    float masterVolume = channels.at(0)->getVolume();
     for (auto it = speakers.begin(); it != speakers.end();) {
         auto speaker = it->second.get();
         int speakerChannel = speaker->getChannel();

src/audio/audio.h

@@ -467,8 +467,8 @@ namespace audio {
     /// @return channel or nullptr
     extern Channel* get_channel(int index);
 
-    /// @brief Get volume of the master channel
-    extern float get_master_volume();
+    /// @brief Get alive speakers number (including paused)
+    extern size_t count_speakers();
 
     /// @brief Update audio streams and sound instanced
     /// @param delta time elapsed since the last update (seconds)

src/engine.cpp

@@ -155,8 +155,15 @@ Engine::~Engine() {
 	std::cout << "-- engine finished" << std::endl;
 }
 
-inline const std::string checkPacks(const std::unordered_set<std::string>& packs, const std::vector<std::string>& dependencies) {
-    for (const std::string& str : dependencies) if (packs.find(str) == packs.end()) return str;
+inline const std::string checkPacks(
+    const std::unordered_set<std::string>& packs, 
+    const std::vector<std::string>& dependencies
+) {
+    for (const std::string& str : dependencies) { 
+        if (packs.find(str) == packs.end()) {
+            return str;
+        }
+    }
     return "";
 }
 
@@ -172,15 +179,20 @@ void Engine::loadContent() {
 
 	std::string missingDependency;
 	std::unordered_set<std::string> loadedPacks, existingPacks;
-	for (const auto& item : srcPacks) { existingPacks.insert(item.id); }
+	for (const auto& item : srcPacks) {
+         existingPacks.insert(item.id);
+    }
 
-	while(existingPacks.size() > loadedPacks.size()) {
+	while (existingPacks.size() > loadedPacks.size()) {
 		for (auto& pack : srcPacks) {
-			if(loadedPacks.find(pack.id) != loadedPacks.end()) continue;
+			if(loadedPacks.find(pack.id) != loadedPacks.end()) {
+                continue;
+            }
 			missingDependency = checkPacks(existingPacks, pack.dependencies);
-			if(!missingDependency.empty()) 
+			if (!missingDependency.empty()) { 
                 throw contentpack_error(pack.id, pack.folder, "missing dependency '"+missingDependency+"'");
-			if(pack.dependencies.empty() || checkPacks(loadedPacks, pack.dependencies).empty()) {
+            }
+			if (pack.dependencies.empty() || checkPacks(loadedPacks, pack.dependencies).empty()) {
 				loadedPacks.insert(pack.id);
 				resRoots.push_back(pack.folder);
 				contentPacks.push_back(pack);
@@ -226,6 +238,7 @@ double Engine::getDelta() const {
 }
 
 void Engine::setScreen(std::shared_ptr<Screen> screen) {
+    audio::reset();
 	this->screen = screen;
 }