+++ /dev/null
-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- * Copyright (C) 2002 Ben Parnell
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <stdio.h>
-#include "sdl.h"
-
-#ifndef DSPSOUND
-
-//#define BSIZE (32768-1024)
-
-static int32 BSIZE;
-static volatile int16 AudioBuf[32768];
-static volatile uint32 readoffs,writeoffs;
-void fillaudio(void *udata, uint8 *stream, int len)
-{
- int16 *dest=(int16 *)stream;
-
- len>>=1;
- while(len)
- {
- *dest=AudioBuf[readoffs];
- dest++;
- readoffs=(readoffs+1)&32767;
- len--;
- }
-}
-
-void WriteSound(int16 *Buffer, int Count, int NoWaiting)
-{
- while(Count)
- {
- while(writeoffs==((readoffs-BSIZE)&32767))
- if(NoWaiting)
- return;
- AudioBuf[writeoffs]=*Buffer;
- writeoffs=(writeoffs+1)&32767;
- Buffer++;
- Count--;
- }
-}
-
-int InitSound(void)
-{
- if(_sound)
- {
- SDL_AudioSpec spec;
-
- if(_lbufsize<_ebufsize)
- {
- puts("Ack, lbufsize must not be smaller than ebufsize!");
- return(0);
- }
- if(_lbufsize<6 || _lbufsize>13)
- {
- puts("lbufsize out of range");
- return(0);
- }
- if(_ebufsize<5)
- {
- puts("ebufsize out of range");
- return(0);
- }
- memset(&spec,0,sizeof(spec));
- if(SDL_InitSubSystem(SDL_INIT_AUDIO)<0)
- {
- puts(SDL_GetError());
- return(0);
- }
- if(_sound==1) _sound=44100;
- spec.freq=_sound;
- spec.format=AUDIO_S16;
- spec.channels=1;
- spec.samples=1<<_ebufsize;
- spec.callback=fillaudio;
- spec.userdata=0;
-
- if(SDL_OpenAudio(&spec,0)<0)
- {
- puts(SDL_GetError());
- SDL_QuitSubSystem(SDL_INIT_AUDIO);
- return(0);
- }
- FCEUI_Sound(_sound);
- BSIZE=32768-(1<<_lbufsize);
- SDL_PauseAudio(0);
- return(1);
- }
- return(0);
-}
-
-void SilenceSound(int n)
-{
- SDL_PauseAudio(n);
-
-}
-
-void KillSound(void)
-{
- SDL_CloseAudio();
- SDL_QuitSubSystem(SDL_INIT_AUDIO);
-}
-
-#else
-#include "../common/unixdsp.h"
-
-void WriteSound(int32 *Buffer, int Count, int NoWaiting)
-{
- WriteUNIXDSPSound(Buffer, Count, NoWaiting);
-}
-
-int InitSound(void)
-{
- if(_sound)
- {
- int rate;
- if(_sound==1)
- _sound=48000;
- rate=_sound;
- if(InitUNIXDSPSound(&rate,_f8bit?0:1,8,8))
- {
- FCEUI_Sound(rate);
- return(1);
- }
- }
- return(0);
-}
-void KillSound(void)
-{
- KillUNIXDSPSound();
-}
-#endif