pulseaudio/doxygen/direction_8h_source.html

 #ifndef foodirectionhfoo

 #define foodirectionhfoo


 /***

   This file is part of PulseAudio.


   Copyright 2014 Intel Corporation


   PulseAudio is free software; you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as published

   by the Free Software Foundation; either version 2.1 of the License,

   or (at your option) any later version.


   PulseAudio is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

   General Public License for more details.


   You should have received a copy of the GNU Lesser General Public License

   along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.

 ***/


 #include <pulse/def.h>


 int pa_direction_valid(pa_direction_t direction) PA_GCC_CONST;


 const char *pa_direction_to_string(pa_direction_t direction);


 #endif

def.h
Global definitions.

pa_direction_t
enum pa_direction pa_direction_t
Direction bitfield - while we currently do not expose anything bidirectional, one should test against...

pa_direction_valid
int pa_direction_valid(pa_direction_t direction) PA_GCC_CONST
Return non-zero if the given value is a valid direction (either input, output or bidirectional).

pa_direction_to_string
const char * pa_direction_to_string(pa_direction_t direction)
Return a textual representation of the direction.

PA_GCC_CONST
#define PA_GCC_CONST
This function's return value depends only the arguments list (stricter version of PA_GCC_PURE)
Definition: gccmacro.h:80