src/audio/SDL_audiodev_c.h
author Ryan C. Gordon
Wed, 18 Mar 2015 02:01:17 -0400
changeset 9394 bb28e5281770
parent 8149 681eb46b8ac4
child 9619 b94b6d0bff0f
permissions -rw-r--r--
Bunch of reworking to how we manage audio devices.

Device enumeration now happens at startup and then is managed exclusively
through hotplugging instead of full redetection. The device name list now has
a unique "handle" associated with each item and SDL will pass this to the
backend so they don't have to figure out how a human readable name maps to
real hardware for a second time.

Other cleanups, fixes, improvements, plus all the audio backends updated to
the new interface...largely untested at this point, though.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "SDL.h"
    22 #include "../SDL_internal.h"
    23 #include "SDL_sysaudio.h"
    24 
    25 /* Open the audio device for playback, and don't block if busy */
    26 /* #define USE_BLOCKING_WRITES */
    27 
    28 #ifdef USE_BLOCKING_WRITES
    29 #define OPEN_FLAGS_OUTPUT O_WRONLY
    30 #define OPEN_FLAGS_INPUT O_RDONLY
    31 #else
    32 #define OPEN_FLAGS_OUTPUT (O_WRONLY|O_NONBLOCK)
    33 #define OPEN_FLAGS_INPUT (O_RDONLY|O_NONBLOCK)
    34 #endif
    35 
    36 extern void SDL_EnumUnixAudioDevices(const int classic, int (*test)(int));
    37 
    38 /* vi: set ts=4 sw=4 expandtab: */