mirror of https://github.com/JorjBauer/aiie.git
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*
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* OpenAL Helpers
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*
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* Copyright (c) 2011 by Chris Robinson <chris.kcat@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/* This file contains routines to help with some menial OpenAL-related tasks,
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* such as opening a device and setting up a context, closing the device and
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* destroying its context, converting between frame counts and byte lengths,
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* finding an appropriate buffer format, and getting readable strings for
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* channel configs and sample types. */
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#include "common.h"
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#include "audio/alhelpers.h"
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/* InitAL opens the default device and sets up a context using default
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* attributes, making the program ready to call OpenAL functions. */
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ALCcontext* InitAL(void)
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{
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ALCdevice *device;
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ALCcontext *ctx;
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/* Open and initialize a device with default settings */
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device = alcOpenDevice(NULL);
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if(!device)
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{
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ERRLOG("Could not open a device!");
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return NULL;
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}
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ctx = alcCreateContext(device, NULL);
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if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE)
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{
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if(ctx != NULL)
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{
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alcDestroyContext(ctx);
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}
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alcCloseDevice(device);
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ERRLOG("Could not set a context!");
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return NULL;
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}
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LOG("Opened \"%s\"", alcGetString(device, ALC_DEVICE_SPECIFIER));
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return ctx;
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}
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/* CloseAL closes the device belonging to the current context, and destroys the
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* context. */
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void CloseAL(void)
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{
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ALCdevice *device;
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ALCcontext *ctx;
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ctx = alcGetCurrentContext();
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if(ctx == NULL)
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{
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return;
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}
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device = alcGetContextsDevice(ctx);
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alcMakeContextCurrent(NULL);
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alcDestroyContext(ctx);
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alcCloseDevice(device);
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}
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