139 lines
2.9 KiB
C
139 lines
2.9 KiB
C
//
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// Copyright(C) 2005-2014 Simon Howard
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// DESCRIPTION:
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// PC speaker interface.
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//
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "pcsound.h"
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#include "pcsound_internal.h"
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#ifdef HAVE_DEV_ISA_SPKRIO_H
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#define HAVE_BSD_SPEAKER
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#endif
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#ifdef HAVE_DEV_SPEAKER_SPEAKER_H
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#define HAVE_BSD_SPEAKER
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#endif
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#ifdef _WIN32
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extern pcsound_driver_t pcsound_win32_driver;
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#endif
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#ifdef HAVE_BSD_SPEAKER
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extern pcsound_driver_t pcsound_bsd_driver;
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#endif
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#ifdef HAVE_LINUX_KD_H
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extern pcsound_driver_t pcsound_linux_driver;
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#endif
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extern pcsound_driver_t pcsound_sdl_driver;
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static pcsound_driver_t *drivers[] =
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{
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#ifdef HAVE_LINUX_KD_H
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&pcsound_linux_driver,
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#endif
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#ifdef HAVE_BSD_SPEAKER
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&pcsound_bsd_driver,
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#endif
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#ifdef _WIN32
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&pcsound_win32_driver,
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#endif
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&pcsound_sdl_driver,
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NULL,
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};
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static pcsound_driver_t *pcsound_driver = NULL;
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int pcsound_sample_rate;
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void PCSound_SetSampleRate(int rate)
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{
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pcsound_sample_rate = rate;
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}
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int PCSound_Init(pcsound_callback_func callback_func)
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{
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char *driver_name;
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int i;
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if (pcsound_driver != NULL)
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{
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return 1;
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}
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// Check if the environment variable is set
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driver_name = getenv("PCSOUND_DRIVER");
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if (driver_name != NULL)
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{
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for (i=0; drivers[i] != NULL; ++i)
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{
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if (!strcmp(drivers[i]->name, driver_name))
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{
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// Found the driver!
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if (drivers[i]->init_func(callback_func))
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{
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pcsound_driver = drivers[i];
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}
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else
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{
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printf("Failed to initialize PC sound driver: %s\n",
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drivers[i]->name);
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break;
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}
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}
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}
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}
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else
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{
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// Try all drivers until we find a working one
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for (i=0; drivers[i] != NULL; ++i)
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{
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if (drivers[i]->init_func(callback_func))
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{
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pcsound_driver = drivers[i];
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break;
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}
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}
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}
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if (pcsound_driver != NULL)
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{
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printf("Using PC sound driver: %s\n", pcsound_driver->name);
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return 1;
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}
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else
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{
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printf("Failed to find a working PC sound driver.\n");
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return 0;
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}
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}
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void PCSound_Shutdown(void)
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{
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pcsound_driver->shutdown_func();
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pcsound_driver = NULL;
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}
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