diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_mcsn.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_mcsn.c | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_mcsn.c b/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_mcsn.c deleted file mode 100644 index a464184..0000000 --- a/distrib/sdl-1.2.12/src/audio/mint/SDL_mintaudio_mcsn.c +++ /dev/null @@ -1,404 +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 (MacSound compatible driver) - - Patrice Mandin -*/ - -#include <support.h> - -/* 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_mcsn.h" - -/*--- Defines ---*/ - -#define MINT_AUDIO_DRIVER_NAME "mint_mcsn" - -/* Debug print info */ -#define DEBUG_NAME "audio:mcsn: " -#if 0 -#define DEBUG_PRINT(what) \ - { \ - printf what; \ - } -#else -#define DEBUG_PRINT(what) -#endif - -/*--- Static variables ---*/ - -static unsigned long cookie_snd, cookie_mch; -static cookie_mcsn_t *cookie_mcsn; - -/*--- 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) -{ - unsigned long dummy; - const char *envr = SDL_getenv("SDL_AUDIODRIVER"); - - SDL_MintAudio_mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); - - /* We can't use XBIOS in interrupt with Magic, don't know about thread */ - if (Getcookie(C_MagX, &dummy) == C_FOUND) { - return(0); - } - - /* 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 16 bits audio */ - if ((cookie_snd & SND_16BIT)==0) { - DEBUG_PRINT((DEBUG_NAME "no 16 bits sound\n")); - return(0); - } - - /* Cookie MCSN present ? */ - if (Getcookie(C_McSn, (long *) &cookie_mcsn) != C_FOUND) { - DEBUG_PRINT((DEBUG_NAME "no MCSN audio\n")); - return(0); - } - - /* Check if interrupt at end of replay */ - if (cookie_mcsn->pint == 0) { - DEBUG_PRINT((DEBUG_NAME "no interrupt at end of replay\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 "MCSN 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_MCSN_bootstrap = { - MINT_AUDIO_DRIVER_NAME, "MiNT MCSN 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 */ - SDL_MintAudio_WaitThread(); - Buffoper(0); - - if (!SDL_MintAudio_mint_present) { - /* Uninstall interrupt */ - Jdisint(MFP_DMASOUND); - } - - /* 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) -{ - int i; - unsigned long masterclock, masterprediv; - - 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! */ - } - - /* Check formats available */ - MINTAUDIO_freqcount=0; - switch(cookie_mcsn->play) { - case MCSN_ST: - spec->channels=1; - spec->format=8; /* FIXME: is it signed or unsigned ? */ - SDL_MintAudio_AddFrequency(this, 12500, 0, 0, -1); - break; - case MCSN_TT: /* Also STE, Mega STE */ - spec->format=AUDIO_S8; - masterclock=MASTERCLOCK_STE; - masterprediv=MASTERPREDIV_STE; - if ((cookie_mch>>16)==MCH_TT) { - masterclock=MASTERCLOCK_TT; - masterprediv=MASTERPREDIV_TT; - } - for (i=0; i<4; i++) { - SDL_MintAudio_AddFrequency(this, masterclock/(masterprediv*(1<<i)), - masterclock, 3-i, -1); - } - break; - case MCSN_FALCON: /* Also Mac */ - for (i=1; i<12; i++) { - /* Remove unusable Falcon codec predivisors */ - if ((i==6) || (i==8) || (i==10)) { - continue; - } - SDL_MintAudio_AddFrequency(this, MASTERCLOCK_FALCON1/(MASTERPREDIV_FALCON*(i+1)), - CLK25M, i+1, -1); - } - if (cookie_mcsn->res1 != 0) { - for (i=1; i<4; i++) { - SDL_MintAudio_AddFrequency(this, (cookie_mcsn->res1)/(MASTERPREDIV_FALCON*(1<<i)), - CLKEXT, (1<<i)-1, -1); - } - } - spec->format |= 0x8000; /* Audio is always signed */ - if ((spec->format & 0x00ff)==16) { - spec->format |= 0x1000; /* Audio is always big endian */ - spec->channels=2; /* 16 bits always stereo */ - } - break; - } - -#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, dmaclock; - void *buffer; - - /* Stop currently playing sound */ - SDL_MintAudio_quit_thread = SDL_FALSE; - SDL_MintAudio_thread_finished = SDL_TRUE; - SDL_MintAudio_WaitThread(); - Buffoper(0); - - /* Set replay tracks */ - Settracks(0,0); - Setmontracks(0); - - /* Select replay format */ - channels_mode=STEREO16; - switch (spec->format & 0xff) { - case 8: - if (spec->channels==2) { - channels_mode=STEREO8; - } else { - channels_mode=MONO8; - } - break; - } - if (Setmode(channels_mode)<0) { - DEBUG_PRINT((DEBUG_NAME "Setmode() failed\n")); - } - - dmaclock = MINTAUDIO_frequencies[MINTAUDIO_numfreq].masterclock; - prediv = MINTAUDIO_frequencies[MINTAUDIO_numfreq].predivisor; - switch(cookie_mcsn->play) { - case MCSN_TT: - Devconnect(DMAPLAY, DAC, CLK25M, CLKOLD, 1); - Soundcmd(SETPRESCALE, prediv); - DEBUG_PRINT((DEBUG_NAME "STE/TT prescaler selected\n")); - break; - case MCSN_FALCON: - Devconnect(DMAPLAY, DAC, dmaclock, prediv, 1); - DEBUG_PRINT((DEBUG_NAME "Falcon prescaler selected\n")); - break; - } - - /* Set buffer */ - buffer = SDL_MintAudio_audiobuf[SDL_MintAudio_numbuf]; - if (Setbuffer(0, buffer, buffer + spec->size)<0) { - DEBUG_PRINT((DEBUG_NAME "Setbuffer() failed\n")); - } - - if (SDL_MintAudio_mint_present) { - SDL_MintAudio_thread_pid = tfork(SDL_MintAudio_Thread, 0); - } else { - /* Install interrupt */ - Jdisint(MFP_DMASOUND); - Xbtimer(XB_TIMERA, 8, 1, SDL_MintAudio_XbiosInterrupt); - Jenabint(MFP_DMASOUND); - - if (Setinterrupt(SI_TIMERA, SI_PLAY)<0) { - DEBUG_PRINT((DEBUG_NAME "Setinterrupt() 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 SDL threaded audio */ -} |