Atari MiNT: added more audio drivers
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40645
This commit is contained in:
Patrice Mandin
parent
ae6427430d
commit
e1695a4b13
16 changed files with 2541 additions and 621 deletions
379
src/audio/mint/SDL_mintaudio_mcsn.c
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379
src/audio/mint/SDL_mintaudio_mcsn.c
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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/*
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MiNT audio driver
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using XBIOS functions (MacSound compatible driver)
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Patrice Mandin
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/* Mint includes */
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#include <mint/osbind.h>
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#include <mint/falcon.h>
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#include <mint/cookie.h>
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#include "SDL_endian.h"
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#include "SDL_audio.h"
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#include "SDL_audio_c.h"
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#include "SDL_audiomem.h"
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#include "SDL_sysaudio.h"
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#include "SDL_atarimxalloc_c.h"
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#include "SDL_mintaudio.h"
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#include "SDL_mintaudio_mcsn.h"
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/*--- Defines ---*/
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#define MINT_AUDIO_DRIVER_NAME "mint_mcsn"
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/* Debug print info */
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#define DEBUG_NAME "audio:mcsn: "
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#if 0
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#define DEBUG_PRINT(what) \
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{ \
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printf what; \
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}
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#else
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#define DEBUG_PRINT(what)
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#endif
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/*--- Static variables ---*/
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static unsigned long cookie_snd, cookie_mch;
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static cookie_mcsn_t *cookie_mcsn;
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/*--- Audio driver functions ---*/
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static void Mint_CloseAudio(_THIS);
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static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
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static void Mint_LockAudio(_THIS);
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static void Mint_UnlockAudio(_THIS);
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/* To check/init hardware audio */
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static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
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static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
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/*--- Audio driver bootstrap functions ---*/
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static int Audio_Available(void)
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{
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const char *envr = getenv("SDL_AUDIODRIVER");
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/* Check if user asked a different audio driver */
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if ((envr) && (strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
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DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
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return(0);
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}
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/* Cookie _MCH present ? if not, assume ST machine */
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if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
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cookie_mch = MCH_ST;
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}
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/* Cookie _SND present ? if not, assume ST machine */
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if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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cookie_snd = SND_PSG;
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}
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/* Check if we have 16 bits audio */
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if ((cookie_snd & SND_16BIT)==0) {
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DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
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return(0);
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}
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/* Cookie MCSN present ? */
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if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) {
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DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n"));
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return(0);
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}
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/* Check if interrupt at end of replay */
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if (cookie_mcsn->pint == 0) {
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DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\n"));
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return(0);
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}
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/* Check if audio is lockable */
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if (Locksnd()!=1) {
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DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
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return(0);
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}
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Unlocksnd();
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DEBUG_PRINT((DEBUG_NAME "MCSN audio available!\n"));
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return(1);
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}
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static void Audio_DeleteDevice(SDL_AudioDevice *device)
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{
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free(device->hidden);
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free(device);
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}
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static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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{
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SDL_AudioDevice *this;
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/* Initialize all variables that we clean on shutdown */
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this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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if ( this ) {
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memset(this, 0, (sizeof *this));
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this->hidden = (struct SDL_PrivateAudioData *)
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malloc((sizeof *this->hidden));
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}
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if ( (this == NULL) || (this->hidden == NULL) ) {
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SDL_OutOfMemory();
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if ( this ) {
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free(this);
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}
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return(0);
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}
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memset(this->hidden, 0, (sizeof *this->hidden));
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/* Set the function pointers */
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this->OpenAudio = Mint_OpenAudio;
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this->CloseAudio = Mint_CloseAudio;
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this->LockAudio = Mint_LockAudio;
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this->UnlockAudio = Mint_UnlockAudio;
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this->free = Audio_DeleteDevice;
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return this;
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}
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AudioBootStrap MINTAUDIO_MCSN_bootstrap = {
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MINT_AUDIO_DRIVER_NAME, "MiNT MCSN audio driver",
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Audio_Available, Audio_CreateDevice
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};
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static void Mint_LockAudio(_THIS)
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{
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/* Stop replay */
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Buffoper(0);
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}
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static void Mint_UnlockAudio(_THIS)
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{
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/* Restart replay */
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Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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}
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static void Mint_CloseAudio(_THIS)
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{
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/* Stop replay */
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Buffoper(0);
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/* Uninstall interrupt */
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Jdisint(MFP_DMASOUND);
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/* Wait if currently playing sound */
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while (SDL_MintAudio_mutex != 0) {
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}
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/* Clear buffers */
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if (SDL_MintAudio_audiobuf[0]) {
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Mfree(SDL_MintAudio_audiobuf[0]);
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SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
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}
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/* Unlock sound system */
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Unlocksnd();
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}
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static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
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{
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int i;
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unsigned long masterclock, masterprediv;
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DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
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DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
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DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x8000)!=0)));
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DEBUG_PRINT(("channels=%d, ", spec->channels));
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DEBUG_PRINT(("freq=%d\n", spec->freq));
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/* Check formats available */
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MINTAUDIO_nfreq=4;
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MINTAUDIO_sfreq=0;
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switch(cookie_mcsn->play) {
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case MCSN_ST:
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spec->channels=1;
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spec->format=8; /* FIXME: is it signed or unsigned ? */
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MINTAUDIO_nfreq=1;
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MINTAUDIO_hardfreq[0]=12500;
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break;
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case MCSN_TT: /* Also STE, Mega STE */
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spec->format=AUDIO_S8;
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masterclock=MASTERCLOCK_STE;
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masterprediv=MASTERPREDIV_STE;
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if ((cookie_mch>>16)==MCH_TT) {
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masterclock=MASTERCLOCK_TT;
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masterprediv=MASTERPREDIV_TT;
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}
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for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) {
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MINTAUDIO_hardfreq[i]=masterclock/(masterprediv*(1<<i));
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DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i]));
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}
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break;
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case MCSN_FALCON: /* Also Mac */
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MINTAUDIO_nfreq=12;
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MINTAUDIO_sfreq=1;
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masterclock=MASTERCLOCK_FALCON1;
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if (cookie_mcsn->res1 != 0) {
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masterclock=cookie_mcsn->res1;
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}
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for (i=MINTAUDIO_sfreq;i<MINTAUDIO_nfreq;i++) {
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MINTAUDIO_hardfreq[i]=masterclock/(MASTERPREDIV_FALCON*(i+1));
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DEBUG_PRINT((DEBUG_NAME "calc:freq(%d)=%lu\n", i, MINTAUDIO_hardfreq[i]));
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}
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spec->format |= 0x8000; /* Audio is always signed */
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if ((spec->format & 0x00ff)==16) {
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spec->format |= 0x1000; /* Audio is always big endian */
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spec->channels=2; /* 16 bits always stereo */
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}
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break;
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}
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MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, (cookie_mch>>16)==MCH_F30, spec->freq);
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spec->freq=MINTAUDIO_hardfreq[MINTAUDIO_numfreq];
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DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
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DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
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DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x8000)!=0)));
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DEBUG_PRINT(("channels=%d, ", spec->channels));
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DEBUG_PRINT(("freq=%d\n", spec->freq));
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return 0;
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}
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static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
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{
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int channels_mode;
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void *buffer;
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/* Stop currently playing sound */
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Buffoper(0);
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/* Set replay tracks */
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Settracks(0,0);
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Setmontracks(0);
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/* Select replay format */
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channels_mode=STEREO16;
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switch (spec->format & 0xff) {
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case 8:
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if (spec->channels==2) {
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channels_mode=STEREO8;
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} else {
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channels_mode=MONO8;
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}
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break;
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}
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if (Setmode(channels_mode)<0) {
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DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
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}
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switch(cookie_mcsn->play) {
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case MCSN_TT:
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Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1);
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Soundcmd(SETPRESCALE, 3-MINTAUDIO_numfreq);
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DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n"));
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break;
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case MCSN_FALCON:
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if (cookie_mcsn->res1 != 0) {
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Devconnect(DMAPLAY, DAC, CLKEXT, MINTAUDIO_numfreq, 1);
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DEBUG_PRINT((DEBUG_NAME "External clock selected, prescaler %d\n", MINTAUDIO_numfreq));
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} else {
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Devconnect(DMAPLAY, DAC, CLK25M, MINTAUDIO_numfreq, 1);
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DEBUG_PRINT((DEBUG_NAME "25.175 MHz clock selected, prescaler %d\n", MINTAUDIO_numfreq));
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}
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break;
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}
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/* Set buffer */
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buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
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if (Setbuffer(0, buffer, buffer + spec->size)<0) {
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DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
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}
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/* Install interrupt */
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Jdisint(MFP_DMASOUND);
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Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);
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Jenabint(MFP_DMASOUND);
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if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
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DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
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}
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/* Go */
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Buffoper(SB_PLA_ENA|SB_PLA_RPT);
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DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
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}
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static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
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{
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/* Lock sound system */
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if (Locksnd()!=1) {
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SDL_SetError("Mint_OpenAudio: Audio system already in use");
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return(-1);
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}
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SDL_MintAudio_device = this;
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/* Check audio capabilities */
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if (Mint_CheckAudio(this, spec)==-1) {
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return -1;
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}
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SDL_CalculateAudioSpec(spec);
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/* Allocate memory for audio buffers in DMA-able RAM */
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spec->size = spec->samples;
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spec->size *= spec->channels;
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spec->size *= (spec->format & 0xFF)/8;
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DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
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SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
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if (SDL_MintAudio_audiobuf[0]==NULL) {
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SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
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return (-1);
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}
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SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
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SDL_MintAudio_numbuf=0;
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memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
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SDL_MintAudio_audiosize = spec->size;
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SDL_MintAudio_mutex = 0;
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DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
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DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
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/* Setup audio hardware */
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Mint_InitAudio(this, spec);
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return(1); /* We don't use threaded audio */
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}
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