ref: 46b0556624aa12ef6067a905707214a1c523d345
dir: /pcsound/pcsound.c/
// // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program 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. // // DESCRIPTION: // PC speaker interface. // #include <stdio.h> #include <stdlib.h> #include <string.h> #include "config.h" #include "pcsound.h" #include "pcsound_internal.h" #ifdef HAVE_DEV_ISA_SPKRIO_H #define HAVE_BSD_SPEAKER #endif #ifdef HAVE_DEV_SPEAKER_SPEAKER_H #define HAVE_BSD_SPEAKER #endif #ifdef _WIN32 extern pcsound_driver_t pcsound_win32_driver; #endif #ifdef HAVE_BSD_SPEAKER extern pcsound_driver_t pcsound_bsd_driver; #endif #ifdef HAVE_LINUX_KD_H extern pcsound_driver_t pcsound_linux_driver; #endif extern pcsound_driver_t pcsound_sdl_driver; static pcsound_driver_t *drivers[] = { #ifdef HAVE_LINUX_KD_H &pcsound_linux_driver, #endif #ifdef HAVE_BSD_SPEAKER &pcsound_bsd_driver, #endif #ifdef _WIN32 &pcsound_win32_driver, #endif &pcsound_sdl_driver, NULL, }; static pcsound_driver_t *pcsound_driver = NULL; int pcsound_sample_rate; void PCSound_SetSampleRate(int rate) { pcsound_sample_rate = rate; } int PCSound_Init(pcsound_callback_func callback_func) { char *driver_name; int i; if (pcsound_driver != NULL) { return 1; } // Check if the environment variable is set driver_name = getenv("PCSOUND_DRIVER"); if (driver_name != NULL) { for (i=0; drivers[i] != NULL; ++i) { if (!strcmp(drivers[i]->name, driver_name)) { // Found the driver! if (drivers[i]->init_func(callback_func)) { pcsound_driver = drivers[i]; } else { printf("Failed to initialize PC sound driver: %s\n", drivers[i]->name); break; } } } } else { // Try all drivers until we find a working one for (i=0; drivers[i] != NULL; ++i) { if (drivers[i]->init_func(callback_func)) { pcsound_driver = drivers[i]; break; } } } if (pcsound_driver != NULL) { printf("Using PC sound driver: %s\n", pcsound_driver->name); return 1; } else { printf("Failed to find a working PC sound driver.\n"); return 0; } } void PCSound_Shutdown(void) { pcsound_driver->shutdown_func(); pcsound_driver = NULL; }