src/audio/mint/SDL_mintaudio_xbios.c
author Patrice Mandin <patmandin@gmail.com>
Tue, 12 Sep 2006 19:23:51 +0000
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parent 2005 45af7d69f8eb
child 2027 d48ead2d2ba5
permissions -rw-r--r--
Disable MiNT thread usage and use hw access for updating DMA audio pointers
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/*
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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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   205
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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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   219
    }
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    oldstack = (void *) Super(0);
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   222
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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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   229
    } else {
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        dev_ctrl |= (INDEX1[sclk] << (src << 4));
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   231
    }
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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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   236
    }
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    if (dst & DSPRECV) {
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        dest_ctrl &= 0xFF8F;
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   240
        dest_ctrl |= (INDEX1[src] << 4);
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   241
    }
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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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   246
    }
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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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   252
        dest_ctrl |= (INDEX2[src] << 12);
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   253
    }
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   255
    sync_div = DMAAUDIO_IO.sync_div;
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   256
    if (sclk == CLKEXT) {
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        pre <<= 8;
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   258
        sync_div &= 0xF0FF;
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   259
    } else {
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   260
        sync_div &= 0xFFF0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   261
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   262
    sync_div |= pre;
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   263
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   264
    DMAAUDIO_IO.dev_ctrl = dev_ctrl;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   265
    DMAAUDIO_IO.dest_ctrl = dest_ctrl;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   266
    DMAAUDIO_IO.sync_div = sync_div;
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   267
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   268
    Super(oldstack);
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   269
}
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   271
static void
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   272
Mint_CheckExternalClock(_THIS)
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   273
{
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   274
#define SIZE_BUF_CLOCK_MEASURE (44100/10)
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   276
    unsigned long cookie_snd;
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   277
    char *buffer;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   278
    int i, j;
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   279
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   280
    /* DSP present with its GPIO port ? */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   281
    if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   282
        return;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   283
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   284
    if ((cookie_snd & SND_DSP) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   285
        return;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   286
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   287
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   288
    buffer = Atari_SysMalloc(SIZE_BUF_CLOCK_MEASURE, MX_STRAM);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   289
    if (buffer == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   290
        DEBUG_PRINT((DEBUG_NAME "Not enough memory for the measure\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   291
        return;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   292
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   293
    SDL_memset(buffer, 0, SIZE_BUF_CLOCK_MEASURE);
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   294
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   295
    Buffoper(0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   296
    Settracks(0, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   297
    Setmontracks(0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   298
    Setmode(MONO8);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   299
    Jdisint(MFP_TIMERA);
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   300
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   301
    for (i = 0; i < 2; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   302
        Gpio(GPIO_SET, 7);      /* DSP port gpio outputs */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   303
        Gpio(GPIO_WRITE, 2 + i);        /* 22.5792/24.576 MHz for 44.1/48KHz */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   304
        Devconnect2(DMAPLAY, DAC, CLKEXT, CLK50K);      /* Matrix and clock source */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   305
        Setbuffer(0, buffer, buffer + SIZE_BUF_CLOCK_MEASURE);  /* Set buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   306
        Xbtimer(XB_TIMERA, 5, 38, SDL_MintAudio_XbiosInterruptMeasureClock);    /* delay mode timer A, prediv /64, 1KHz */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   307
        Jenabint(MFP_TIMERA);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   308
        SDL_MintAudio_clocktics = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   309
        Buffoper(SB_PLA_ENA);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   310
        usleep(110000);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   311
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   312
        if ((Buffoper(-1) & 1) == 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   313
            if (SDL_MintAudio_clocktics) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   314
                unsigned long khz;
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   315
1895
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   316
                khz =
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   317
                    ((SIZE_BUF_CLOCK_MEASURE /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   318
                      SDL_MintAudio_clocktics) + 1) & 0xFFFFFFFE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   319
                DEBUG_PRINT((DEBUG_NAME "measure %d: freq=%lu KHz\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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   320
                             i + 1, khz));
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diff changeset
   321
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   322
                if (khz == 44) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   323
                    for (j = 1; j < 4; j++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   324
                        SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   325
                                                   MASTERCLOCK_44K
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   326
                                                   /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   327
                                                   (MASTERPREDIV_FALCON
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   328
                                                    * (1 << j)),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   329
                                                   MASTERCLOCK_44K,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   330
                                                   (1 << j) - 1, 2 + i);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   331
                    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   332
                } else if (khz == 48) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   333
                    for (j = 1; j < 4; j++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   334
                        SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   335
                                                   MASTERCLOCK_48K
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   336
                                                   /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   337
                                                   (MASTERPREDIV_FALCON
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   338
                                                    * (1 << j)),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   339
                                                   MASTERCLOCK_48K,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   340
                                                   (1 << j) - 1, 2 + i);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   341
                    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   342
                }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   343
            } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   344
                DEBUG_PRINT((DEBUG_NAME "No measure\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1412
diff changeset
   345
            }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   346
        } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   347
            DEBUG_PRINT((DEBUG_NAME "No SDMA clock\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   348
        }
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diff changeset
   349
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   350
        Buffoper(0);            /* stop */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   351
        Jdisint(MFP_TIMERA);    /* Uninstall interrupt */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   352
    }
961
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diff changeset
   353
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   354
    Mfree(buffer);
961
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diff changeset
   355
}
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
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diff changeset
   356
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   357
static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   358
Mint_CheckAudio(_THIS, SDL_AudioSpec * spec)
644
594422ab8f9f Atari MiNT: added more audio drivers
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parents:
diff changeset
   359
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   360
    int i;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
   361
    Uint32 extclock;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   362
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   363
    DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ", SDL_AUDIO_BITSIZE(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   364
    DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   365
    DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   366
    DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format)));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   367
    DEBUG_PRINT(("channels=%d, ", spec->channels));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   368
    DEBUG_PRINT(("freq=%d\n", spec->freq));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   369
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   370
    spec->format |= SDL_AUDIO_MASK_SIGNED;     /* Audio is always signed */
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   371
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   372
    /* clamp out int32/float32 */
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   373
    if (SDL_AUDIO_BITSIZE(spec->format) >= 16) {
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   374
        spec->format = AUDIO_S16MSB; /* Audio is always big endian */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   375
        spec->channels = 2;     /* 16 bits always stereo */
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   376
    } else if (spec->channels > 2) {
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   377
        spec->channels = 2;  /* no more than stereo! */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   378
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   379
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   380
    MINTAUDIO_freqcount = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   381
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   382
    /* Add external clocks if present */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   383
    Mint_CheckExternalClock(this);
1107
856f76a099c7 Can use both clocks of FDI interface on Falcon, plus digital output
Patrice Mandin <patmandin@gmail.com>
parents: 1106
diff changeset
   384
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   385
    /* Standard clocks */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   386
    for (i = 1; i < 12; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   387
        /* Remove unusable Falcon codec predivisors */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   388
        if ((i == 6) || (i == 8) || (i == 10)) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   389
            continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   390
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   391
        SDL_MintAudio_AddFrequency(this,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   392
                                   MASTERCLOCK_FALCON1 /
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   393
                                   (MASTERPREDIV_FALCON * (i + 1)),
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   394
                                   MASTERCLOCK_FALCON1, i, -1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   395
    }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
   396
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
   397
#if 1
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   398
    for (i = 0; i < MINTAUDIO_freqcount; i++) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   399
        DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   400
                     i, MINTAUDIO_frequencies[i].frequency,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   401
                     MINTAUDIO_frequencies[i].masterclock,
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   402
                     MINTAUDIO_frequencies[i].predivisor));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   403
    }
961
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
   404
#endif
185acc07127a Date: Fri, 29 Oct 2004 11:47:09 +0200
Patrice Mandin <patmandin@gmail.com>
parents: 769
diff changeset
   405
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   406
    MINTAUDIO_numfreq = SDL_MintAudio_SearchFrequency(this, spec->freq);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   407
    spec->freq = MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   408
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   409
    DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ", SDL_AUDIO_BITSIZE(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   410
    DEBUG_PRINT(("float=%d, ", SDL_AUDIO_ISFLOAT(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   411
    DEBUG_PRINT(("signed=%d, ", SDL_AUDIO_ISSIGNED(spec->format)));
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   412
    DEBUG_PRINT(("big endian=%d, ", SDL_AUDIO_ISBIGENDIAN(spec->format)));
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   413
    DEBUG_PRINT(("channels=%d, ", spec->channels));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   414
    DEBUG_PRINT(("freq=%d\n", spec->freq));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   415
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   416
    return 0;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   417
}
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   418
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   419
static void
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   420
Mint_InitAudio(_THIS, SDL_AudioSpec * spec)
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   421
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   422
    int channels_mode, dmaclock, prediv;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   423
    void *buffer;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   424
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   425
    /* Stop currently playing sound */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   426
    SDL_MintAudio_quit_thread = SDL_FALSE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   427
    SDL_MintAudio_thread_finished = SDL_TRUE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   428
    SDL_MintAudio_WaitThread();
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   429
    Buffoper(0);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   430
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   431
    /* Set replay tracks */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   432
    Settracks(0, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   433
    Setmontracks(0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   434
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   435
    /* Select replay format */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   436
    channels_mode = STEREO16;
2005
45af7d69f8eb MiNT audio driver cleanups for clamping types and channels to supported
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   437
    switch (SDL_AUDIO_BITSIZE(spec->format)) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   438
    case 8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   439
        if (spec->channels == 2) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   440
            channels_mode = STEREO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   441
        } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   442
            channels_mode = MONO8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   443
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   444
        break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   445
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   446
    if (Setmode(channels_mode) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   447
        DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   448
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   449
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   450
    dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   451
    prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   452
    if (MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits != -1) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   453
        Gpio(GPIO_SET, 7);      /* DSP port gpio outputs */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   454
        Gpio(GPIO_WRITE, MINTAUDIO_frequencies[MINTAUDIO_numfreq].gpio_bits);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   455
        Devconnect2(DMAPLAY, DAC | EXTOUT, CLKEXT, prediv);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   456
    } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   457
        Devconnect2(DMAPLAY, DAC, CLK25M, prediv);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   458
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   459
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   460
    /* Set buffer */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   461
    buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   462
    if (Setbuffer(0, buffer, buffer + spec->size) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   463
        DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   464
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   465
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   466
    if (SDL_MintAudio_mint_present) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   467
        SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   468
    } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   469
        /* Install interrupt */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   470
        Jdisint(MFP_DMASOUND);
2022
649e9ac39f74 Disable MiNT thread usage and use hw access for updating DMA audio pointers
Patrice Mandin <patmandin@gmail.com>
parents: 2005
diff changeset
   471
        /*Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt);*/
649e9ac39f74 Disable MiNT thread usage and use hw access for updating DMA audio pointers
Patrice Mandin <patmandin@gmail.com>
parents: 2005
diff changeset
   472
        Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   473
        Jenabint(MFP_DMASOUND);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   474
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   475
        if (Setinterrupt(SI_TIMERA, SI_PLAY) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   476
            DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   477
        }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   478
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   479
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   480
    /* Go */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   481
    Buffoper(SB_PLA_ENA | SB_PLA_RPT);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   482
    DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   483
}
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   484
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   485
static int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   486
Mint_OpenAudio(_THIS, SDL_AudioSpec * spec)
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   487
{
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   488
    /* Lock sound system */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   489
    if (Locksnd() != 1) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   490
        SDL_SetError("Mint_OpenAudio: Audio system already in use");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   491
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   492
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   493
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   494
    SDL_MintAudio_device = this;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   495
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   496
    /* Check audio capabilities */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   497
    if (Mint_CheckAudio(this, spec) == -1) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   498
        return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   499
    }
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   500
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   501
    SDL_CalculateAudioSpec(spec);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   502
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   503
    /* Allocate memory for audio buffers in DMA-able RAM */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   504
    DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   505
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   506
    SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size * 2, MX_STRAM);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   507
    if (SDL_MintAudio_audiobuf[0] == NULL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   508
        SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   509
        return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   510
    }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   511
    SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   512
    SDL_MintAudio_numbuf = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   513
    SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size * 2);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   514
    SDL_MintAudio_audiosize = spec->size;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   515
    SDL_MintAudio_mutex = 0;
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   516
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   517
    DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   518
                 SDL_MintAudio_audiobuf[0]));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   519
    DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n",
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   520
                 SDL_MintAudio_audiobuf[1]));
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   521
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   522
    /* Setup audio hardware */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   523
    Mint_InitAudio(this, spec);
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   524
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   525
    return (1);                 /* We don't use SDL threaded audio */
644
594422ab8f9f Atari MiNT: added more audio drivers
Patrice Mandin <patmandin@gmail.com>
parents:
diff changeset
   526
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   527
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1412
diff changeset
   528
/* vi: set ts=4 sw=4 expandtab: */