Clear the decode queue on mouse lock or focus gain. This closes #5

input.cpp

@@ -27,6 +27,11 @@ static int ConvertPPButtonToLiButton(PP_InputEvent_MouseButton ppButton) {
 
 void MoonlightInstance::DidLockMouse(int32_t result) {
     m_MouseLocked = (result == PP_OK);
+    if (m_MouseLocked) {
+        // Request an IDR frame to dump the frame queue that may have
+        // built up from the GL pipeline being stalled.
+        g_Instance->m_RequestIdrFrame = true;
+    }
 }
 
 void MoonlightInstance::MouseLockLost() {

moonlight.hpp

@@ -39,6 +39,7 @@ class MoonlightInstance : public pp::Instance, public pp::MouseLock {
             pp::Instance(instance),
             pp::MouseLock(this),
             m_IsPainting(false),
+            m_RequestIdrFrame(false),
             m_OpusDecoder(NULL),
             m_CallbackFactory(this),
             m_MouseLocked(false),
@@ -69,6 +70,7 @@ class MoonlightInstance : public pp::Instance, public pp::MouseLock {
         
         void DidLockMouse(int32_t result);
         void MouseLockLost();
+        void DidChangeFocus(bool got_focus);
         
         void OnConnectionStopped(uint32_t unused);
         void OnConnectionStarted(uint32_t error);
@@ -125,6 +127,7 @@ class MoonlightInstance : public pp::Instance, public pp::MouseLock {
         Shader m_ExternalOesShader;
         std::queue<PP_VideoPicture> m_PendingPictureQueue;
         bool m_IsPainting;
+        bool m_RequestIdrFrame;
         
         OpusMSDecoder* m_OpusDecoder;
         pp::Audio m_AudioPlayer;

viddec.cpp

@@ -54,6 +54,14 @@ static const char k_FragmentShaderExternal[] =
       "    gl_FragColor = texture2D(s_texture, v_texCoord); \n"
       "}";
     
+void MoonlightInstance::DidChangeFocus(bool got_focus) {
+    // Request an IDR frame to dump the frame queue that may have
+    // built up from the GL pipeline being stalled.
+    if (got_focus) {
+        g_Instance->m_RequestIdrFrame = true;
+    }
+}
+
 void MoonlightInstance::DidChangeView(const pp::Rect& position,
                                       const pp::Rect& clip) {
                                           
@@ -169,6 +177,12 @@ int MoonlightInstance::VidDecSubmitDecodeUnit(PDECODE_UNIT decodeUnit) {
     PLENTRY entry;
     unsigned int offset;
     
+    // Request an IDR frame if needed
+    if (g_Instance->m_RequestIdrFrame) {
+        g_Instance->m_RequestIdrFrame = false;
+        return DR_NEED_IDR;
+    }
+    
     // Resize the decode buffer if needed
     if (decodeUnit->fullLength > s_DecodeBufferLength) {
         free(s_DecodeBuffer);