void start_mixer(QSurface *surface, QSurface *surface2, QSurface *surface3, QSurface *surface4);
void mixer_quit();
+enum Source {
+ SOURCE_INPUT1,
+ SOURCE_INPUT2,
+ SOURCE_SBS,
+};
+void mixer_cut(Source source);
+
struct DisplayFrame {
GLuint texnum;
RefCountedGLsync ready_fence; // Asserted when the texture is done rendering.