dc_state_add_stream
if (dc_state_add_stream(
dc_result = dc_state_add_stream(dc, dc_state, stream);
res = dc_state_add_stream(dc, context, add_streams[i]);
enum dc_status res = dc_state_add_stream(dc, state, phantom_stream);
enum dc_status dc_state_add_stream(const struct dc *dc,