def on_bus_message_sync(bus, message, glsink):
if message.type == Gst.MessageType.NEED_CONTEXT:
_, context_type = message.parse_context_type()
if context_type == GstGL.GL_DISPLAY_CONTEXT_TYPE:
sinkelement = glsink.get_by_interface(GstVideo.VideoOverlay)
gl_context = sinkelement.get_property('context')
if gl_context:
display_context = Gst.Context.new(GstGL.GL_DISPLAY_CONTEXT_TYPE, True)
GstGL.context_set_gl_display(display_context, gl_context.get_display())
message.src.set_context(display_context)
return Gst.BusSyncReply.PASS
def render_to_texture_gl(self, glcontext, dst, render_func, render_arg):
libgstgl.gst_gl_framebuffer_draw_to_texture(
hash(self.fbo),
hash(dst.peek_memory(0)),
GstGLFramebufferFunc(render_func),
render_arg)
meta = GstGL.buffer_add_gl_sync_meta(glcontext, dst)
meta.set_sync_point(glcontext)
def __init__(self, pool, glupload):
self.glcontext = glupload.context
res, self.dmabuf = pool.acquire_buffer()
assert res == Gst.FlowReturn.OK
assert GstAllocators.is_dmabuf_memory(self.dmabuf.peek_memory(0))
with _gst_buffer_map(self.dmabuf, Gst.MapFlags.WRITE) as mapped:
self.ptr = ctypes.addressof(mapped)
self.len = ctypes.sizeof(mapped)
self.clear()
meta = GstVideo.buffer_get_video_meta(self.dmabuf)
assert meta
self.surface = libcairo.cairo_image_surface_create_for_data(
self.ptr, int(cairo.FORMAT_ARGB32), meta.width, meta.height,
meta.stride[0])
self.cairo = libcairo.cairo_create(self.surface)
res, self.gl_buffer = glupload.perform_with_buffer(self.dmabuf)
assert res == GstGL.GLUploadReturn.DONE
memory = self.gl_buffer.peek_memory(0)
assert GstGL.is_gl_memory(memory)
self.texture_id = libgstgl.gst_gl_memory_get_texture_id(hash(memory))
self.sync = GstGL.buffer_add_gl_sync_meta(self.glcontext,
self.gl_buffer)
def is_egl_image(buf):
memory = buf.peek_memory(0)
assert GstGL.is_gl_memory(memory)
return libgstgl.gst_is_gl_memory_egl(hash(memory))
def get_gl_texture_id(buf):
memory = buf.peek_memory(0)
assert GstGL.is_gl_memory(memory)
return libgstgl.gst_gl_memory_get_texture_id(hash(memory))
def get_gl_display_context(self):
if not self.glcontext:
return None
context = Gst.Context.new(GstGL.GL_DISPLAY_CONTEXT_TYPE, True)
GstGL.context_set_gl_display(context, self.glcontext.get_display())
return context