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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_gsxb.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_gsxb.c436
1 files changed, 0 insertions, 436 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_gsxb.c b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_gsxb.c
deleted file mode 100644
index 41f78c9..0000000
--- a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_gsxb.c
+++ /dev/null
@@ -1,436 +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 XBIOS functions (GSXB compatible driver)
-
- 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_gsxb.h"
-
-/*--- Defines ---*/
-
-#define MINT_AUDIO_DRIVER_NAME "mint_gsxb"
-
-/* Debug print info */
-#define DEBUG_NAME "audio:gsxb: "
-#if 0
-#define DEBUG_PRINT(what) \
- { \
- printf what; \
- }
-#else
-#define DEBUG_PRINT(what)
-#endif
-
-/*--- Static variables ---*/
-
-static unsigned long cookie_snd, cookie_gsxb;
-
-/*--- 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);
-
-/* GSXB callbacks */
-static void Mint_GsxbInterrupt(void);
-static void Mint_GsxbNullInterrupt(void);
-
-/*--- 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 _SND present ? if not, assume ST machine */
- if (Getcookie(C__SND, &cookie_snd) == C_NOTFOUND) {
- cookie_snd = SND_PSG;
- }
-
- /* Check if we have 16 bits audio */
- if ((cookie_snd & SND_16BIT)==0) {
- DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n"));
- return(0);
- }
-
- /* Cookie GSXB present ? */
- cookie_gsxb = (Getcookie(C_GSXB, &cookie_gsxb) == C_FOUND);
-
- /* Is it GSXB ? */
- if (((cookie_snd & SND_GSXB)==0) || (cookie_gsxb==0)) {
- DEBUG_PRINT((DEBUG_NAME "no GSXB audio\n"));
- return(0);
- }
-
- /* Check if audio is lockable */
- if (Locksnd()!=1) {
- DEBUG_PRINT((DEBUG_NAME "audio locked by other application\n"));
- return(0);
- }
-
- Unlocksnd();
-
- DEBUG_PRINT((DEBUG_NAME "GSXB 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_GSXB_bootstrap = {
- MINT_AUDIO_DRIVER_NAME, "MiNT GSXB audio driver",
- Audio_Available, Audio_CreateDevice
-};
-
-static void Mint_LockAudio(_THIS)
-{
- /* Stop replay */
- Buffoper(0);
-}
-
-static void Mint_UnlockAudio(_THIS)
-{
- /* Restart replay */
- Buffoper(SB_PLA_ENA|SB_PLA_RPT);
-}
-
-static void Mint_CloseAudio(_THIS)
-{
- /* Stop replay */
- Buffoper(0);
-
- /* Uninstall interrupt */
- if (NSetinterrupt(2, SI_NONE, Mint_GsxbNullInterrupt)<0) {
- DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed in close\n"));
- }
-
- /* Wait if currently playing sound */
- while (SDL_MintAudio_mutex != 0) {
- }
-
- /* Clear buffers */
- if (SDL_MintAudio_audiobuf[0]) {
- Mfree(SDL_MintAudio_audiobuf[0]);
- SDL_MintAudio_audiobuf[0] = SDL_MintAudio_audiobuf[1] = NULL;
- }
-
- /* Unlock sound system */
- Unlocksnd();
-}
-
-static int Mint_CheckAudio(_THIS, SDL_AudioSpec *spec)
-{
- long snd_format;
- int i, resolution, format_signed, format_bigendian;
- Uint16 test_format = SDL_FirstAudioFormat(spec->format);
- int valid_datatype = 0;
-
- resolution = spec->format & 0x00ff;
- format_signed = ((spec->format & 0x8000)!=0);
- format_bigendian = ((spec->format & 0x1000)!=0);
-
- 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; /* no more than stereo! */
- }
-
- while ((!valid_datatype) && (test_format)) {
- /* Check formats available */
- snd_format = Sndstatus(SND_QUERYFORMATS);
- spec->format = test_format;
- resolution = spec->format & 0xff;
- format_signed = (spec->format & (1<<15));
- format_bigendian = (spec->format & (1<<12));
- switch (test_format) {
- case AUDIO_U8:
- case AUDIO_S8:
- if (snd_format & SND_FORMAT8) {
- valid_datatype = 1;
- snd_format = Sndstatus(SND_QUERY8BIT);
- }
- break;
-
- case AUDIO_U16LSB:
- case AUDIO_S16LSB:
- case AUDIO_U16MSB:
- case AUDIO_S16MSB:
- if (snd_format & SND_FORMAT16) {
- valid_datatype = 1;
- snd_format = Sndstatus(SND_QUERY16BIT);
- }
- break;
-
- default:
- test_format = SDL_NextAudioFormat();
- break;
- }
- }
-
- if (!valid_datatype) {
- SDL_SetError("Unsupported audio format");
- return (-1);
- }
-
- /* Check signed/unsigned format */
- if (format_signed) {
- if (snd_format & SND_FORMATSIGNED) {
- /* Ok */
- } else if (snd_format & SND_FORMATUNSIGNED) {
- /* Give unsigned format */
- spec->format = spec->format & (~0x8000);
- }
- } else {
- if (snd_format & SND_FORMATUNSIGNED) {
- /* Ok */
- } else if (snd_format & SND_FORMATSIGNED) {
- /* Give signed format */
- spec->format |= 0x8000;
- }
- }
-
- if (format_bigendian) {
- if (snd_format & SND_FORMATBIGENDIAN) {
- /* Ok */
- } else if (snd_format & SND_FORMATLITTLEENDIAN) {
- /* Give little endian format */
- spec->format = spec->format & (~0x1000);
- }
- } else {
- if (snd_format & SND_FORMATLITTLEENDIAN) {
- /* Ok */
- } else if (snd_format & SND_FORMATBIGENDIAN) {
- /* Give big endian format */
- spec->format |= 0x1000;
- }
- }
-
- /* Calculate and select the closest frequency */
- MINTAUDIO_freqcount=0;
- for (i=1;i<4;i++) {
- SDL_MintAudio_AddFrequency(this,
- MASTERCLOCK_44K/(MASTERPREDIV_MILAN*(1<<i)), MASTERCLOCK_44K,
- (1<<i)-1, -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)
-{
- int channels_mode, prediv;
- void *buffer;
-
- /* Stop currently playing sound */
- Buffoper(0);
-
- /* Set replay tracks */
- Settracks(0,0);
- Setmontracks(0);
-
- /* Select replay format */
- switch (spec->format & 0xff) {
- case 8:
- if (spec->channels==2) {
- channels_mode=STEREO8;
- } else {
- channels_mode=MONO8;
- }
- break;
- case 16:
- if (spec->channels==2) {
- channels_mode=STEREO16;
- } else {
- channels_mode=MONO16;
- }
- break;
- default:
- channels_mode=STEREO16;
- break;
- }
- if (Setmode(channels_mode)<0) {
- DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n"));
- }
-
- prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor;
- Devconnect(DMAPLAY, DAC, CLKEXT, prediv, 1);
-
- /* Set buffer */
- buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
- if (Setbuffer(0, buffer, buffer + spec->size)<0) {
- DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n"));
- }
-
- /* Install interrupt */
- if (NSetinterrupt(2, SI_PLAY, Mint_GsxbInterrupt)<0) {
- DEBUG_PRINT((DEBUG_NAME "NSetinterrupt() failed\n"));
- }
-
- /* Go */
- Buffoper(SB_PLA_ENA|SB_PLA_RPT);
- DEBUG_PRINT((DEBUG_NAME "hardware initialized\n"));
-}
-
-static int Mint_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- /* Lock sound system */
- if (Locksnd()!=1) {
- SDL_SetError("Mint_OpenAudio: Audio system already in use");
- return(-1);
- }
-
- 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 */
-}
-
-static void Mint_GsxbInterrupt(void)
-{
- Uint8 *newbuf;
-
- if (SDL_MintAudio_mutex)
- return;
-
- SDL_MintAudio_mutex=1;
-
- SDL_MintAudio_numbuf ^= 1;
- SDL_MintAudio_Callback();
- newbuf = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf];
- Setbuffer(0, newbuf, newbuf + SDL_MintAudio_audiosize);
-
- SDL_MintAudio_mutex=0;
-}
-
-static void Mint_GsxbNullInterrupt(void)
-{
-}
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