d32e462e3f
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402075
528 lines
15 KiB
C
528 lines
15 KiB
C
/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 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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#include "SDL_config.h"
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/*
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MiNT audio driver
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using XBIOS functions (Falcon)
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Patrice Mandin, Didier Méquignon
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*/
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#include <unistd.h>
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#include <support.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_audio.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_sysaudio.h"
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#include "../../video/ataricommon/SDL_atarimxalloc_c.h"
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#include "SDL_mintaudio.h"
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#include "SDL_mintaudio_dma8.h"
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/*--- Defines ---*/
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#define MINT_AUDIO_DRIVER_NAME "mint_xbios"
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/* Debug print info */
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#define DEBUG_NAME "audio:xbios: "
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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;
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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
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Audio_Available(void)
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{
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unsigned long dummy;
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const char *envr = SDL_getenv("SDL_AUDIODRIVER");
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/*SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);*/
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SDL_MintAudio_mint_present = SDL_FALSE;
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/* We can't use XBIOS in interrupt with Magic, don't know about thread */
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if (Getcookie(C_MagX, &dummy) == C_FOUND) {
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return (0);
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}
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/* Check if user asked a different audio driver */
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if ((envr) && (SDL_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 _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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/* 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 "XBIOS audio available!\n"));
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return (1);
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}
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static void
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Audio_DeleteDevice(SDL_AudioDevice * device)
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{
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SDL_free(device->hidden);
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SDL_free(device);
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}
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static SDL_AudioDevice *
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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 *) SDL_malloc(sizeof(SDL_AudioDevice));
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if (this) {
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SDL_memset(this, 0, (sizeof *this));
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this->hidden = (struct SDL_PrivateAudioData *)
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SDL_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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SDL_free(this);
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}
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return (0);
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}
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SDL_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_XBIOS_bootstrap = {
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MINT_AUDIO_DRIVER_NAME, "MiNT XBIOS audio driver",
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Audio_Available, Audio_CreateDevice
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};
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static void
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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
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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
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Mint_CloseAudio(_THIS)
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{
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/* Stop replay */
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SDL_MintAudio_WaitThread();
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Buffoper(0);
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if (!SDL_MintAudio_mint_present) {
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/* Uninstall interrupt */
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Jdisint(MFP_DMASOUND);
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}
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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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/* Falcon XBIOS implementation of Devconnect() is buggy with external clock */
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static void
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Devconnect2(int src, int dst, int sclk, int pre)
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{
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static const unsigned short MASK1[3] = { 0, 0x6000, 0 };
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static const unsigned short MASK2[4] = { 0xFFF0, 0xFF8F, 0xF0FF, 0x0FFF };
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static const unsigned short INDEX1[4] = { 1, 3, 5, 7 };
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static const unsigned short INDEX2[4] = { 0, 2, 4, 6 };
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unsigned short sync_div, dev_ctrl, dest_ctrl;
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void *oldstack;
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if (dst == 0) {
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return;
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}
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oldstack = (void *) Super(0);
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dev_ctrl = DMAAUDIO_IO.dev_ctrl;
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dest_ctrl = DMAAUDIO_IO.dest_ctrl;
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dev_ctrl &= MASK2[src];
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if (src == ADC) {
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dev_ctrl |= MASK1[sclk];
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} else {
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dev_ctrl |= (INDEX1[sclk] << (src << 4));
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}
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if (dst & DMAREC) {
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dest_ctrl &= 0xFFF0;
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dest_ctrl |= INDEX1[src];
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}
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if (dst & DSPRECV) {
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dest_ctrl &= 0xFF8F;
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dest_ctrl |= (INDEX1[src] << 4);
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}
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if (dst & EXTOUT) {
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dest_ctrl &= 0xF0FF;
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dest_ctrl |= (INDEX1[src] << 8);
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}
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if (dst & DAC) {
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dev_ctrl &= 0x0FFF;
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dev_ctrl |= MASK1[sclk];
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dest_ctrl &= 0x0FFF;
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dest_ctrl |= (INDEX2[src] << 12);
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}
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sync_div = DMAAUDIO_IO.sync_div;
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if (sclk == CLKEXT) {
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pre <<= 8;
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sync_div &= 0xF0FF;
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} else {
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sync_div &= 0xFFF0;
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}
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sync_div |= pre;
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DMAAUDIO_IO.dev_ctrl = dev_ctrl;
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DMAAUDIO_IO.dest_ctrl = dest_ctrl;
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DMAAUDIO_IO.sync_div = sync_div;
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Super(oldstack);
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}
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static void
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Mint_CheckExternalClock(_THIS)
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{
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#define SIZE_BUF_CLOCK_MEASURE (44100/10)
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unsigned long cookie_snd;
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char *buffer;
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int i, j;
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/* DSP present with its GPIO port ? */
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if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
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return;
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}
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if ((cookie_snd & SND_DSP) == 0) {
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return;
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}
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buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
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if (buffer == NULL) {
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DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
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return;
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}
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SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
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Buffoper(0);
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Settracks(0, 0);
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Setmontracks(0);
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Setmode(MONO8);
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Jdisint(MFP_TIMERA);
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for (i = 0; i < 2; i++) {
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Gpio(GPIO_SET, 7); /* DSP port gpio outputs */
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Gpio(GPIO_WRITE, 2 + i); /* 22.5792/24.576 MHz for 44.1/48KHz */
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Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K); /* Matrix and clock source */
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Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE); /* Set buffer */
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Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock); /* delay mode timer A, prediv /64, 1KHz */
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Jenabint(MFP_TIMERA);
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SDL_MintAudio_clocktics = 0;
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Buffoper(SB_PLA_ENA);
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usleep(110000);
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if ((Buffoper(-1) & 1) == 0) {
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if (SDL_MintAudio_clocktics) {
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unsigned long khz;
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khz =
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((SIZE_BUF_CLOCK_MEASURE /
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SDL_MintAudio_clocktics) + 1) & 0xFFFFFFFE;
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DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n",
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i + 1, khz));
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if (khz == 44) {
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for (j = 1; j < 4; j++) {
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SDL_MintAudio_AddFrequency(this,
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MASTERCLOCK_44K
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/
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(MASTERPREDIV_FALCON
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* (1 << j)),
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MASTERCLOCK_44K,
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(1 << j) - 1, 2 + i);
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}
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} else if (khz == 48) {
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for (j = 1; j < 4; j++) {
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SDL_MintAudio_AddFrequency(this,
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MASTERCLOCK_48K
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/
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(MASTERPREDIV_FALCON
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* (1 << j)),
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MASTERCLOCK_48K,
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(1 << j) - 1, 2 + i);
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}
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}
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} else {
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DEBUG_PRINT((DEBUG_NAME "No measure\n"));
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}
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} else {
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DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
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}
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Buffoper(0); /* stop */
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Jdisint(MFP_TIMERA); /* Uninstall interrupt */
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}
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Mfree(buffer);
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}
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static int
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Mint_CheckAudio(_THIS, SDL_AudioSpec * spec)
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{
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int i;
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Uint32 extclock;
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DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", SDL_AUDIO_BITSIZE(spec->format)));
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DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
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DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format)));
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DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format)));
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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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spec->format |= SDL_AUDIO_MASK_SIGNED; /* Audio is always signed */
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/* clamp out int32/float32 */
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if (SDL_AUDIO_BITSIZE(spec->format) >= 16) {
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spec->format = AUDIO_S16MSB; /* Audio is always big endian */
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spec->channels = 2; /* 16 bits always stereo */
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} else if (spec->channels > 2) {
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spec->channels = 2; /* no more than stereo! */
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}
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MINTAUDIO_freqcount = 0;
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/* Add external clocks if present */
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Mint_CheckExternalClock(this);
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/* Standard clocks */
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for (i = 1; i < 12; i++) {
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/* Remove unusable Falcon codec predivisors */
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if ((i == 6) || (i == 8) || (i == 10)) {
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continue;
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}
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SDL_MintAudio_AddFrequency(this,
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MASTERCLOCK_FALCON1 /
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(MASTERPREDIV_FALCON * (i + 1)),
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MASTERCLOCK_FALCON1, i, -1);
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}
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#if 1
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for (i = 0; i < MINTAUDIO_freqcount; i++) {
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DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
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i, MINTAUDIO_frequencies[i].frequency,
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MINTAUDIO_frequencies[i].masterclock,
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MINTAUDIO_frequencies[i].predivisor));
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}
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#endif
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MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, spec->freq);
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spec->freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
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DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", SDL_AUDIO_BITSIZE(spec->format)));
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DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
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DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format)));
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DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format)));
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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
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Mint_InitAudio(_THIS, SDL_AudioSpec * spec)
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{
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int channels_mode, dmaclock, prediv;
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void *buffer;
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/* Stop currently playing sound */
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SDL_MintAudio_quit_thread = SDL_FALSE;
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SDL_MintAudio_thread_finished = SDL_TRUE;
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SDL_MintAudio_WaitThread();
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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 (SDL_AUDIO_BITSIZE(spec->format)) {
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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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dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
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prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
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if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
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Gpio(GPIO_SET, 7); /* DSP port gpio outputs */
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Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
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Devconnect2(DMAPLAY, DAC | EXTOUT, CLKEXT, prediv);
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} else {
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Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
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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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if (SDL_MintAudio_mint_present) {
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SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
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} else {
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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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Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
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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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}
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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
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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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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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SDL_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",
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SDL_MintAudio_audiobuf[0]));
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|
DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
|
|
SDL_MintAudio_audiobuf[1]));
|
|
|
|
/* Setup audio hardware */
|
|
Mint_InitAudio(this, spec);
|
|
|
|
return (1); /* We don't use SDL threaded audio */
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|