support multiple listeners based on pid

src/main/cpp/external_texture.cpp

@@ -40,3 +40,8 @@ void ExternalTexture::unbind() const
 {
     glBindTexture(GL_TEXTURE_2D, 0);
 }
+
+GLuint ExternalTexture::texture_id() const
+{
+    return texture;
+}

src/main/cpp/external_texture.h

@@ -11,4 +11,5 @@ public:
     void destroy();
     void bind() const;
     void unbind() const;
+    GLuint texture_id() const;
 };

src/main/cpp/kernel.cpp

@@ -23,10 +23,12 @@ void Kernel::main_loop()
         return;
     }
     m_render_target->bind();
-    m_listener->onServiceInitialized(true);
+    for (const auto& [pid, l] : m_listeners)
+        l->onServiceInitialized(true);
     m_aidl_buffer = std::make_unique<HardwareBuffer>();
     m_aidl_buffer->reset(m_render_target->hardware_buffer());
-    m_listener->onBufferAvailable(*m_aidl_buffer);
+    for (const auto& [pid, l] : m_listeners)
+        l->onBufferAvailable(*m_aidl_buffer);
 
     while (true)
     {
@@ -37,23 +39,25 @@ void Kernel::main_loop()
         glFinish();
         {
             std::lock_guard _lock(m_mutex);
-            m_listener->onFrameAvailable();
+            for (const auto& [pid, l] : m_listeners)
+                l->onFrameAvailable();
         }
         std::this_thread::sleep_for(std::chrono::milliseconds(100));
     }
 }
 
-Kernel::Kernel(const std::shared_ptr<IMosisListener> &listener) : m_listener(listener)
+Kernel::Kernel(const std::shared_ptr<IMosisListener> &listener)
 {
+    m_listeners.emplace(AIBinder_getCallingPid(), listener);
     m_main_loop_thread = std::thread(&Kernel::main_loop, this);
 }
 
-void Kernel::set_listener(const std::shared_ptr<IMosisListener> &listener)
+void Kernel::add_listener(const std::shared_ptr<IMosisListener> &listener)
 {
     std::lock_guard _lock(m_mutex);
-    m_listener = listener;
-    m_listener->onServiceInitialized(true);
-    m_listener->onBufferAvailable(*m_aidl_buffer);
+    m_listeners.emplace(AIBinder_getCallingPid(), listener);
+    listener->onServiceInitialized(true);
+    listener->onBufferAvailable(*m_aidl_buffer);
 }
 
 Kernel::~Kernel() = default;

src/main/cpp/kernel.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <memory>
+#include <unordered_map>
 #include <thread>
 
 class RenderTarget;
@@ -12,7 +13,7 @@ class Kernel
 {
     std::unique_ptr<egl::Context> m_egl_context;
     std::unique_ptr<RenderTarget> m_render_target;
-    std::shared_ptr<aidl::com::omixlab::mosis::IMosisListener> m_listener;
+    std::unordered_map<pid_t, std::shared_ptr<aidl::com::omixlab::mosis::IMosisListener>> m_listeners;
     std::unique_ptr<aidl::android::hardware::HardwareBuffer> m_aidl_buffer;
     std::mutex m_mutex;
     std::thread m_main_loop_thread;
@@ -20,5 +21,5 @@ class Kernel
 public:
     explicit Kernel(const std::shared_ptr<aidl::com::omixlab::mosis::IMosisListener>& listener);
     virtual ~Kernel();
-    void set_listener(const std::shared_ptr<aidl::com::omixlab::mosis::IMosisListener>& listener);
+    void add_listener(const std::shared_ptr<aidl::com::omixlab::mosis::IMosisListener>& listener);
 };

src/main/cpp/mosis-service.cpp

@@ -44,7 +44,7 @@ public:
         }
         else
         {
-            m_kernel->set_listener(listener);
+            m_kernel->add_listener(listener);
             *_aidl_return = true;
         }
         return ndk::ScopedAStatus::ok();

src/main/java/com/omixlab/mosis/NativeService.kt

@@ -39,7 +39,7 @@ class NativeService : Service() {
         val serviceChannel = NotificationChannel(
             CHANNEL_ID,
             "Mosis Service Channel",
-            NotificationManager.IMPORTANCE_LOW
+            NotificationManager.IMPORTANCE_DEFAULT
         )
         val manager = getSystemService(NotificationManager::class.java)
         manager.createNotificationChannel(serviceChannel)