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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_dma8.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_dma8.c361
1 files changed, 0 insertions, 361 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_dma8.c b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_dma8.c
deleted file mode 100644
index d4c43cf..0000000
--- a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_dma8.c
+++ /dev/null
@@ -1,361 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2004 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-/*
- MiNT audio driver
- using DMA 8bits (hardware access)
-
- Patrice Mandin
-*/
-
-/* Mint includes */
-#include <mint/osbind.h>
-#include <mint/falcon.h>
-#include <mint/cookie.h>
-
-#include "SDL_audio.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_sysaudio.h"
-
-#include "../../video/ataricommon/SDL_atarimxalloc_c.h"
-
-#include "SDL_mintaudio.h"
-#include "SDL_mintaudio_dma8.h"
-
-/*--- Defines ---*/
-
-#define MINT_AUDIO_DRIVER_NAME "mint_dma8"
-
-/* Debug print info */
-#define DEBUG_NAME "audio:dma8: "
-#if 0
-#define DEBUG_PRINT(what) \
- { \
- printf what; \
- }
-#else
-#define DEBUG_PRINT(what)
-#endif
-
-/*--- Static variables ---*/
-
-static unsigned long cookie_snd, cookie_mch;
-
-/*--- Audio driver functions ---*/
-
-static void Mint_CloseAudio(_THIS);
-static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void Mint_LockAudio(_THIS);
-static void Mint_UnlockAudio(_THIS);
-
-/* To check/init hardware audio */
-static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec);
-static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec);
-
-/*--- Audio driver bootstrap functions ---*/
-
-static int Audio_Available(void)
-{
- const char *envr = SDL_getenv("SDL_AUDIODRIVER");
-
- /* Check if user asked a different audio driver */
- if ((envr) && (SDL_strcmp(envr, MINT_AUDIO_DRIVER_NAME)!=0)) {
- DEBUG_PRINT((DEBUG_NAME "user asked a different audio driver\n"));
- return 0;
- }
-
- /* Cookie _MCH present ? if not, assume ST machine */
- if (Getcookie(C__MCH, &cookie_mch) == C_NOTFOUND) {
- cookie_mch = MCH_ST;
- }
-
- /* Cookie _SND present ? if not, assume ST machine */
- if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
- cookie_snd = SND_PSG;
- }
-
- /* Check if we have 8 bits audio */
- if ((cookie_snd & SND_8BIT)==0) {
- DEBUG_PRINT((DEBUG_NAME "no 8 bits sound\n"));
- return(0);
- }
-
- /* Check if audio is lockable */
- if (cookie_snd & SND_16BIT) {
- if (Locksnd()!=1) {
- DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
- return(0);
- }
-
- Unlocksnd();
- }
-
- DEBUG_PRINT((DEBUG_NAME "8 bits audio available!\n"));
- return(1);
-}
-
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
-{
- SDL_free(device->hidden);
- SDL_free(device);
-}
-
-static SDL_AudioDevice *Audio_CreateDevice(int devindex)
-{
- SDL_AudioDevice *this;
-
- /* Initialize all variables that we clean on shutdown */
- this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
- if ( this ) {
- SDL_memset(this, 0, (sizeof *this));
- this->hidden = (struct SDL_PrivateAudioData *)
- SDL_malloc((sizeof *this->hidden));
- }
- if ( (this == NULL) || (this->hidden == NULL) ) {
- SDL_OutOfMemory();
- if ( this ) {
- SDL_free(this);
- }
- return(0);
- }
- SDL_memset(this->hidden, 0, (sizeof *this->hidden));
-
- /* Set the function pointers */
- this->OpenAudio = Mint_OpenAudio;
- this->CloseAudio = Mint_CloseAudio;
- this->LockAudio = Mint_LockAudio;
- this->UnlockAudio = Mint_UnlockAudio;
- this->free = Audio_DeleteDevice;
-
- return this;
-}
-
-AudioBootStrap MINTAUDIO_DMA8_bootstrap = {
- MINT_AUDIO_DRIVER_NAME, "MiNT DMA 8 bits audio driver",
- Audio_Available, Audio_CreateDevice
-};
-
-static void Mint_LockAudio(_THIS)
-{
- void *oldpile;
-
- /* Stop replay */
- oldpile=(void *)Super(0);
- DMAAUDIO_IO.control=0;
- Super(oldpile);
-}
-
-static void Mint_UnlockAudio(_THIS)
-{
- void *oldpile;
-
- /* Restart replay */
- oldpile=(void *)Super(0);
- DMAAUDIO_IO.control=3;
- Super(oldpile);
-}
-
-static void Mint_CloseAudio(_THIS)
-{
- void *oldpile;
-
- /* Stop replay */
- oldpile=(void *)Super(0);
- DMAAUDIO_IO.control=0;
- Super(oldpile);
-
- DEBUG_PRINT((DEBUG_NAME "closeaudio: replay stopped\n"));
-
- /* Disable interrupt */
- Jdisint(MFP_DMASOUND);
-
- DEBUG_PRINT((DEBUG_NAME "closeaudio: interrupt disabled\n"));
-
- /* Wait if currently playing sound */
- while (SDL_MintAudio_mutex != 0) {
- }
-
- DEBUG_PRINT((DEBUG_NAME "closeaudio: no more interrupt running\n"));
-
- /* Clear buffers */
- if (SDL_MintAudio_audiobuf[0]) {
- Mfree(SDL_MintAudio_audiobuf[0]);
- SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
- }
-
- DEBUG_PRINT((DEBUG_NAME "closeaudio: buffers freed\n"));
-}
-
-static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
-{
- int i, masterprediv, sfreq;
- unsigned long masterclock;
-
- DEBUG_PRINT((DEBUG_NAME "asked: %d bits, ",spec->format & 0x00ff));
- DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
- DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
- DEBUG_PRINT(("channels=%d, ", spec->channels));
- DEBUG_PRINT(("freq=%d\n", spec->freq));
-
- if (spec->channels > 2)
- spec->channels = 2;
-
- /* Check formats available */
- spec->format = AUDIO_S8;
-
- /* Calculate and select the closest frequency */
- sfreq=0;
- masterclock=MASTERCLOCK_STE;
- masterprediv=MASTERPREDIV_STE;
- switch(cookie_mch>>16) {
-/*
- case MCH_STE:
- masterclock=MASTERCLOCK_STE;
- masterprediv=MASTERPREDIV_STE;
- break;
-*/
- case MCH_TT:
- masterclock=MASTERCLOCK_TT;
- masterprediv=MASTERPREDIV_TT;
- break;
- case MCH_F30:
- case MCH_ARANYM:
- masterclock=MASTERCLOCK_FALCON1;
- masterprediv=MASTERPREDIV_FALCON;
- sfreq=1;
- break;
- }
-
- MINTAUDIO_freqcount=0;
- for (i=sfreq;i<4;i++) {
- SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)),
- masterclock, i-sfreq, -1);
- }
-
-#if 1
- for (i=0; i<MINTAUDIO_freqcount; i++) {
- DEBUG_PRINT((DEBUG_NAME "freq %d: %lu Hz, clock %lu, prediv %d\n",
- i, MINTAUDIO_frequencies[i].frequency, MINTAUDIO_frequencies[i].masterclock,
- MINTAUDIO_frequencies[i].predivisor
- ));
- }
-#endif
-
- MINTAUDIO_numfreq=SDL_MintAudio_SearchFrequency(this, spec->freq);
- spec->freq=MINTAUDIO_frequencies[MINTAUDIO_numfreq].frequency;
-
- DEBUG_PRINT((DEBUG_NAME "obtained: %d bits, ",spec->format & 0x00ff));
- DEBUG_PRINT(("signed=%d, ", ((spec->format & 0x8000)!=0)));
- DEBUG_PRINT(("big endian=%d, ", ((spec->format & 0x1000)!=0)));
- DEBUG_PRINT(("channels=%d, ", spec->channels));
- DEBUG_PRINT(("freq=%d\n", spec->freq));
-
- return 0;
-}
-
-static void Mint_InitAudio(_THIS, SDL_AudioSpec *spec)
-{
- void *oldpile;
- unsigned long buffer;
- unsigned char mode;
-
- /* Set replay tracks */
- if (cookie_snd & SND_16BIT) {
- Settracks(0,0);
- Setmontracks(0);
- }
-
- oldpile=(void *)Super(0);
-
- /* Stop currently playing sound */
- DMAAUDIO_IO.control=0;
-
- /* Set buffer */
- buffer = (unsigned long) SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
- DMAAUDIO_IO.start_high = (buffer>>16) & 255;
- DMAAUDIO_IO.start_mid = (buffer>>8) & 255;
- DMAAUDIO_IO.start_low = buffer & 255;
-
- buffer += SDL_MintAudio_audiosize;
- DMAAUDIO_IO.end_high = (buffer>>16) & 255;
- DMAAUDIO_IO.end_mid = (buffer>>8) & 255;
- DMAAUDIO_IO.end_low = buffer & 255;
-
- mode = 3-MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
- if (spec->channels==1) {
- mode |= 1<<7;
- }
- DMAAUDIO_IO.sound_ctrl = mode;
-
- /* Set interrupt */
- Jdisint(MFP_DMASOUND);
- Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_Dma8Interrupt);
- Jenabint(MFP_DMASOUND);
-
- if (cookie_snd & SND_16BIT) {
- if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) {
- DEBUG_PRINT((DEBUG_NAME "Setinterrupt() failed\n"));
- }
- }
-
- /* Go */
- DMAAUDIO_IO.control = 3; /* playback + repeat */
-
- Super(oldpile);
-}
-
-static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- SDL_MintAudio_device = this;
-
- /* Check audio capabilities */
- if (Mint_CheckAudio(this, spec)==-1) {
- return -1;
- }
-
- SDL_CalculateAudioSpec(spec);
-
- /* Allocate memory for audio buffers in DMA-able RAM */
- DEBUG_PRINT((DEBUG_NAME "buffer size=%d\n", spec->size));
-
- SDL_MintAudio_audiobuf[0] = Atari_SysMalloc(spec->size *2, MX_STRAM);
- if (SDL_MintAudio_audiobuf[0]==NULL) {
- SDL_SetError("MINT_OpenAudio: Not enough memory for audio buffer");
- return (-1);
- }
- SDL_MintAudio_audiobuf[1] = SDL_MintAudio_audiobuf[0] + spec->size ;
- SDL_MintAudio_numbuf=0;
- SDL_memset(SDL_MintAudio_audiobuf[0], spec->silence, spec->size *2);
- SDL_MintAudio_audiosize = spec->size;
- SDL_MintAudio_mutex = 0;
-
- DEBUG_PRINT((DEBUG_NAME "buffer 0 at 0x%08x\n", SDL_MintAudio_audiobuf[0]));
- DEBUG_PRINT((DEBUG_NAME "buffer 1 at 0x%08x\n", SDL_MintAudio_audiobuf[1]));
-
- SDL_MintAudio_CheckFpu();
-
- /* Setup audio hardware */
- Mint_InitAudio(this, spec);
-
- return(1); /* We don't use threaded audio */
-}
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