Mercurial > hg > forks > pwpunix
view pwplib/snd-sdl.c @ 6:e2f028bf775a
Possibly start SDL audio more sanely.
author | Matti Hamalainen <ccr@tnsp.org> |
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date | Tue, 18 May 2010 05:34:18 +0300 |
parents | acb5694e93d9 |
children | a379d6a2a717 |
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/* * pwplib SDL (Simple Directmedia Layer) audio "driver" * (C) Copyright 2010 ccr/TNSP^PWP <ccr@tnsp.org> * * This file and other changes are distributed under same * license as pwplib itself. */ #include "config.h" #ifdef DRIVE_SDL #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <SDL.h> #include "pwplib.h" #define TIMERHZ 72 static int pwp_sdlaudio_start = 1; extern void gb_sound(int, int, int, int); static void pwp_sdlaudio_fill(void *udata, Uint8 * buf, int len) { pwplib.player(); gb_genwave(buf, len); } static void pwp_sdlaudio_loopflush(void) { if (pwp_sdlaudio_start) { pwp_sdlaudio_start = 0; SDL_PauseAudio(0); } } static void pwp_sdlaudio_close(void) { SDL_CloseAudio(); } int pwp_sdlaudio_init() { SDL_AudioSpec fmt; fmt.freq = 44100; fmt.format = AUDIO_U8; fmt.channels = 1; fmt.samples = fmt.freq / TIMERHZ; fmt.callback = pwp_sdlaudio_fill; if (SDL_OpenAudio(&fmt, NULL) < 0) { pwpwrite("* SDL: Could not get desired audio format.\n"); return 0; } pwpwrite("* SDL sound\n"); pwplib.sound = gb_sound; pwplib.loopflush = pwp_sdlaudio_loopflush; gb_init(fmt.freq); pwp_regdestr(pwp_sdlaudio_close); return 1; } #endif