Here is a list of all files with brief descriptions:

docs
doxygen
other
pydoc_macros.h
include
gnuradio
fosphor
api.h
base_sink_c.h
glfw_sink_c.h
overlap_cc.h
qt_sink_c.h
lib
fosphor
llist.h	Simple double-linked list
resource_internal.h	Internal header for the resource management
lib
fosphor
axis.h	Logic to deal with various axises
cl.h	OpenCL base routines
cl_compat.h	Handle OpenCL 1.1 <> 1.2 fallback and the related uglyness
cl_platform.h	Wrapper to select proper OpenCL headers for various platforms
fosphor.h	Main fosphor entry point
gl.h	OpenGL part of fosphor
gl_cmap.h	OpenGL float texture to color mapping
gl_cmap_gen.h	OpenGL color map generators
gl_font.h	Basic OpenGL font rendering
gl_platform.h	Wrapper to select proper OpenGL headers for various platforms
llist.h	Simple double-linked list
private.h	Private fosphor definitions
resource.h	Resource management header
resource_internal.h	Internal header for the resource management
base_sink_c_impl.h
fifo.h
glfw_sink_c_impl.h
overlap_cc_impl.h
QGLSurface.h
qt_sink_c_impl.h
python
bindings
pydoc_macros.h