MPV should respect volume levels now

Signed-off-by: Alexis Maiquez <almamu@almamu.com>

main.cpp

@@ -66,5 +66,7 @@ int main (int argc, char* argv[])
     // show the wallpaper application
     app.show ();
 
+    appPointer = nullptr;
+
     return 0;
 }

src/WallpaperEngine/Application/CWallpaperApplication.cpp

@@ -20,6 +20,9 @@ using namespace WallpaperEngine::Application;
 CWallpaperApplication::CWallpaperApplication (CApplicationContext& context) :
     m_context (context)
 {
+    // copy state to global variables for now
+    g_AudioVolume = context.audioVolume;
+    g_AudioEnabled = context.audioEnabled;
     this->setupContainer ();
     this->loadProject ();
     this->setupProperties ();

src/WallpaperEngine/Audio/Drivers/CSDLAudioDriver.cpp

@@ -12,7 +12,7 @@ using namespace WallpaperEngine::Audio::Drivers;
 
 void audio_callback (void* userdata, uint8_t* streamData, int length)
 {
-    CSDLAudioDriver* driver = reinterpret_cast <CSDLAudioDriver*> (userdata);
+    auto* driver = reinterpret_cast <CSDLAudioDriver*> (userdata);
 
     memset (streamData, 0, length);
 

src/WallpaperEngine/Render/CVideo.cpp

@@ -5,6 +5,7 @@
 #include <GL/glew.h>
 
 extern bool g_AudioEnabled;
+extern int g_AudioVolume;
 
 using namespace WallpaperEngine;
 using namespace WallpaperEngine::Render;
@@ -19,6 +20,8 @@ CVideo::CVideo (Core::CVideo* video, CRenderContext* context, CAudioContext* aud
     m_width (16),
     m_height (16)
 {
+    double volume = g_AudioVolume * 100.0 / 128.0;
+
     // create mpv contexts
     this->m_mpv = mpv_create ();
 
@@ -37,6 +40,7 @@ CVideo::CVideo (Core::CVideo* video, CRenderContext* context, CAudioContext* aud
 
     mpv_set_option_string (this->m_mpv, "hwdec", "auto");
     mpv_set_option_string (this->m_mpv, "loop", "inf");
+    mpv_set_option (this->m_mpv, "volume", MPV_FORMAT_DOUBLE, &volume);
 
     // initialize gl context for mpv
     mpv_opengl_init_params gl_init_params {get_proc_address, nullptr};